| /* |
| * various utility functions for use within FFmpeg |
| * Copyright (c) 2000, 2001, 2002 Fabrice Bellard |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* #define DEBUG */ |
| |
| #include "avformat.h" |
| #include "avio_internal.h" |
| #include "internal.h" |
| #include "libavcodec/internal.h" |
| #include "libavcodec/raw.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/dict.h" |
| #include "libavutil/pixdesc.h" |
| #include "metadata.h" |
| #include "id3v2.h" |
| #include "libavutil/avstring.h" |
| #include "riff.h" |
| #include "audiointerleave.h" |
| #include "url.h" |
| #include <sys/time.h> |
| #include <time.h> |
| #include <strings.h> |
| #include <stdarg.h> |
| #if CONFIG_NETWORK |
| #include "network.h" |
| #endif |
| |
| #undef NDEBUG |
| #include <assert.h> |
| |
| /** |
| * @file |
| * various utility functions for use within FFmpeg |
| */ |
| |
| unsigned avformat_version(void) |
| { |
| return LIBAVFORMAT_VERSION_INT; |
| } |
| |
| const char *avformat_configuration(void) |
| { |
| return FFMPEG_CONFIGURATION; |
| } |
| |
| const char *avformat_license(void) |
| { |
| #define LICENSE_PREFIX "libavformat license: " |
| return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1; |
| } |
| |
| /* fraction handling */ |
| |
| /** |
| * f = val + (num / den) + 0.5. |
| * |
| * 'num' is normalized so that it is such as 0 <= num < den. |
| * |
| * @param f fractional number |
| * @param val integer value |
| * @param num must be >= 0 |
| * @param den must be >= 1 |
| */ |
| static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den) |
| { |
| num += (den >> 1); |
| if (num >= den) { |
| val += num / den; |
| num = num % den; |
| } |
| f->val = val; |
| f->num = num; |
| f->den = den; |
| } |
| |
| /** |
| * Fractional addition to f: f = f + (incr / f->den). |
| * |
| * @param f fractional number |
| * @param incr increment, can be positive or negative |
| */ |
| static void av_frac_add(AVFrac *f, int64_t incr) |
| { |
| int64_t num, den; |
| |
| num = f->num + incr; |
| den = f->den; |
| if (num < 0) { |
| f->val += num / den; |
| num = num % den; |
| if (num < 0) { |
| num += den; |
| f->val--; |
| } |
| } else if (num >= den) { |
| f->val += num / den; |
| num = num % den; |
| } |
| f->num = num; |
| } |
| |
| /** head of registered input format linked list */ |
| static AVInputFormat *first_iformat = NULL; |
| /** head of registered output format linked list */ |
| static AVOutputFormat *first_oformat = NULL; |
| |
| AVInputFormat *av_iformat_next(AVInputFormat *f) |
| { |
| if(f) return f->next; |
| else return first_iformat; |
| } |
| |
| AVOutputFormat *av_oformat_next(AVOutputFormat *f) |
| { |
| if(f) return f->next; |
| else return first_oformat; |
| } |
| |
| void av_register_input_format(AVInputFormat *format) |
| { |
| AVInputFormat **p; |
| p = &first_iformat; |
| while (*p != NULL) p = &(*p)->next; |
| *p = format; |
| format->next = NULL; |
| } |
| |
| void av_register_output_format(AVOutputFormat *format) |
| { |
| AVOutputFormat **p; |
| p = &first_oformat; |
| while (*p != NULL) p = &(*p)->next; |
| *p = format; |
| format->next = NULL; |
| } |
| |
| int av_match_ext(const char *filename, const char *extensions) |
| { |
| const char *ext, *p; |
| char ext1[32], *q; |
| |
| if(!filename) |
| return 0; |
| |
| ext = strrchr(filename, '.'); |
| if (ext) { |
| ext++; |
| p = extensions; |
| for(;;) { |
| q = ext1; |
| while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1) |
| *q++ = *p++; |
| *q = '\0'; |
| if (!strcasecmp(ext1, ext)) |
| return 1; |
| if (*p == '\0') |
| break; |
| p++; |
| } |
| } |
| return 0; |
| } |
| |
| static int match_format(const char *name, const char *names) |
| { |
| const char *p; |
| int len, namelen; |
| |
| if (!name || !names) |
| return 0; |
| |
| namelen = strlen(name); |
| while ((p = strchr(names, ','))) { |
| len = FFMAX(p - names, namelen); |
| if (!strncasecmp(name, names, len)) |
| return 1; |
| names = p+1; |
| } |
| return !strcasecmp(name, names); |
| } |
| |
| AVOutputFormat *av_guess_format(const char *short_name, const char *filename, |
| const char *mime_type) |
| { |
| AVOutputFormat *fmt = NULL, *fmt_found; |
| int score_max, score; |
| |
| /* specific test for image sequences */ |
| #if CONFIG_IMAGE2_MUXER |
| if (!short_name && filename && |
| av_filename_number_test(filename) && |
| ff_guess_image2_codec(filename) != CODEC_ID_NONE) { |
| return av_guess_format("image2", NULL, NULL); |
| } |
| #endif |
| /* Find the proper file type. */ |
| fmt_found = NULL; |
| score_max = 0; |
| while ((fmt = av_oformat_next(fmt))) { |
| score = 0; |
| if (fmt->name && short_name && !strcmp(fmt->name, short_name)) |
| score += 100; |
| if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type)) |
| score += 10; |
| if (filename && fmt->extensions && |
| av_match_ext(filename, fmt->extensions)) { |
| score += 5; |
| } |
| if (score > score_max) { |
| score_max = score; |
| fmt_found = fmt; |
| } |
| } |
| return fmt_found; |
| } |
| |
| enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name, |
| const char *filename, const char *mime_type, enum AVMediaType type){ |
| if(type == AVMEDIA_TYPE_VIDEO){ |
| enum CodecID codec_id= CODEC_ID_NONE; |
| |
| #if CONFIG_IMAGE2_MUXER |
| if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){ |
| codec_id= ff_guess_image2_codec(filename); |
| } |
| #endif |
| if(codec_id == CODEC_ID_NONE) |
| codec_id= fmt->video_codec; |
| return codec_id; |
| }else if(type == AVMEDIA_TYPE_AUDIO) |
| return fmt->audio_codec; |
| else if (type == AVMEDIA_TYPE_SUBTITLE) |
| return fmt->subtitle_codec; |
| else |
| return CODEC_ID_NONE; |
| } |
| |
| AVInputFormat *av_find_input_format(const char *short_name) |
| { |
| AVInputFormat *fmt = NULL; |
| while ((fmt = av_iformat_next(fmt))) { |
| if (match_format(short_name, fmt->name)) |
| return fmt; |
| } |
| return NULL; |
| } |
| |
| |
| int av_get_packet(AVIOContext *s, AVPacket *pkt, int size) |
| { |
| int ret= av_new_packet(pkt, size); |
| |
| if(ret<0) |
| return ret; |
| |
| pkt->pos= avio_tell(s); |
| |
| ret= avio_read(s, pkt->data, size); |
| if(ret<=0) |
| av_free_packet(pkt); |
| else |
| av_shrink_packet(pkt, ret); |
| |
| return ret; |
| } |
| |
| int av_append_packet(AVIOContext *s, AVPacket *pkt, int size) |
| { |
| int ret; |
| int old_size; |
| if (!pkt->size) |
| return av_get_packet(s, pkt, size); |
| old_size = pkt->size; |
| ret = av_grow_packet(pkt, size); |
| if (ret < 0) |
| return ret; |
| ret = avio_read(s, pkt->data + old_size, size); |
| av_shrink_packet(pkt, old_size + FFMAX(ret, 0)); |
| return ret; |
| } |
| |
| |
| int av_filename_number_test(const char *filename) |
| { |
| char buf[1024]; |
| return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0); |
| } |
| |
| AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret) |
| { |
| AVProbeData lpd = *pd; |
| AVInputFormat *fmt1 = NULL, *fmt; |
| int score, score_max=0; |
| |
| if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) { |
| int id3len = ff_id3v2_tag_len(lpd.buf); |
| if (lpd.buf_size > id3len + 16) { |
| lpd.buf += id3len; |
| lpd.buf_size -= id3len; |
| } |
| } |
| |
| fmt = NULL; |
| while ((fmt1 = av_iformat_next(fmt1))) { |
| if (!is_opened == !(fmt1->flags & AVFMT_NOFILE)) |
| continue; |
| score = 0; |
| if (fmt1->read_probe) { |
| score = fmt1->read_probe(&lpd); |
| if(!score && fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions)) |
| score = 1; |
| } else if (fmt1->extensions) { |
| if (av_match_ext(lpd.filename, fmt1->extensions)) { |
| score = 50; |
| } |
| } |
| if (score > score_max) { |
| score_max = score; |
| fmt = fmt1; |
| }else if (score == score_max) |
| fmt = NULL; |
| } |
| *score_ret= score_max; |
| return fmt; |
| } |
| |
| AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max) |
| { |
| int score_ret; |
| AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret); |
| if(score_ret > *score_max){ |
| *score_max= score_ret; |
| return fmt; |
| }else |
| return NULL; |
| } |
| |
| AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){ |
| int score=0; |
| return av_probe_input_format2(pd, is_opened, &score); |
| } |
| |
| static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd) |
| { |
| static const struct { |
| const char *name; enum CodecID id; enum AVMediaType type; |
| } fmt_id_type[] = { |
| { "aac" , CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO }, |
| { "ac3" , CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO }, |
| { "dts" , CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO }, |
| { "eac3" , CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO }, |
| { "h264" , CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO }, |
| { "m4v" , CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO }, |
| { "mp3" , CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO }, |
| { "mpegvideo", CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO }, |
| { 0 } |
| }; |
| int score; |
| AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score); |
| |
| if (fmt) { |
| int i; |
| av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n", |
| pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score); |
| for (i = 0; fmt_id_type[i].name; i++) { |
| if (!strcmp(fmt->name, fmt_id_type[i].name)) { |
| st->codec->codec_id = fmt_id_type[i].id; |
| st->codec->codec_type = fmt_id_type[i].type; |
| break; |
| } |
| } |
| } |
| return score; |
| } |
| |
| /************************************************************/ |
| /* input media file */ |
| |
| #if FF_API_FORMAT_PARAMETERS |
| static AVDictionary *convert_format_parameters(AVFormatParameters *ap) |
| { |
| char buf[1024]; |
| AVDictionary *opts = NULL; |
| |
| if (!ap) |
| return NULL; |
| |
| if (ap->time_base.num) { |
| snprintf(buf, sizeof(buf), "%d/%d", ap->time_base.den, ap->time_base.num); |
| av_dict_set(&opts, "framerate", buf, 0); |
| } |
| if (ap->sample_rate) { |
| snprintf(buf, sizeof(buf), "%d", ap->sample_rate); |
| av_dict_set(&opts, "sample_rate", buf, 0); |
| } |
| if (ap->channels) { |
| snprintf(buf, sizeof(buf), "%d", ap->channels); |
| av_dict_set(&opts, "channels", buf, 0); |
| } |
| if (ap->width || ap->height) { |
| snprintf(buf, sizeof(buf), "%dx%d", ap->width, ap->height); |
| av_dict_set(&opts, "video_size", buf, 0); |
| } |
| if (ap->pix_fmt != PIX_FMT_NONE) { |
| av_dict_set(&opts, "pixel_format", av_get_pix_fmt_name(ap->pix_fmt), 0); |
| } |
| if (ap->channel) { |
| snprintf(buf, sizeof(buf), "%d", ap->channel); |
| av_dict_set(&opts, "channel", buf, 0); |
| } |
| if (ap->standard) { |
| av_dict_set(&opts, "standard", ap->standard, 0); |
| } |
| if (ap->mpeg2ts_compute_pcr) { |
| av_dict_set(&opts, "mpeg2ts_compute_pcr", "1", 0); |
| } |
| if (ap->initial_pause) { |
| av_dict_set(&opts, "initial_pause", "1", 0); |
| } |
| return opts; |
| } |
| |
| /** |
| * Open a media file from an IO stream. 'fmt' must be specified. |
| */ |
| int av_open_input_stream(AVFormatContext **ic_ptr, |
| AVIOContext *pb, const char *filename, |
| AVInputFormat *fmt, AVFormatParameters *ap) |
| { |
| int err; |
| AVDictionary *opts; |
| AVFormatContext *ic; |
| AVFormatParameters default_ap; |
| |
| if(!ap){ |
| ap=&default_ap; |
| memset(ap, 0, sizeof(default_ap)); |
| } |
| opts = convert_format_parameters(ap); |
| |
| if(!ap->prealloced_context) |
| *ic_ptr = ic = avformat_alloc_context(); |
| else |
| ic = *ic_ptr; |
| if (!ic) { |
| err = AVERROR(ENOMEM); |
| goto fail; |
| } |
| if (pb && fmt && fmt->flags & AVFMT_NOFILE) |
| av_log(ic, AV_LOG_WARNING, "Custom AVIOContext makes no sense and " |
| "will be ignored with AVFMT_NOFILE format.\n"); |
| else |
| ic->pb = pb; |
| |
| if ((err = avformat_open_input(&ic, filename, fmt, &opts)) < 0) |
| goto fail; |
| ic->pb = ic->pb ? ic->pb : pb; // don't leak custom pb if it wasn't set above |
| |
| fail: |
| *ic_ptr = ic; |
| av_dict_free(&opts); |
| return err; |
| } |
| #endif |
| |
| int av_demuxer_open(AVFormatContext *ic, AVFormatParameters *ap){ |
| int err; |
| |
| if (ic->iformat->read_header) { |
| err = ic->iformat->read_header(ic, ap); |
| if (err < 0) |
| return err; |
| } |
| |
| if (ic->pb && !ic->data_offset) |
| ic->data_offset = avio_tell(ic->pb); |
| |
| return 0; |
| } |
| |
| |
| /** size of probe buffer, for guessing file type from file contents */ |
| #define PROBE_BUF_MIN 2048 |
| #define PROBE_BUF_MAX (1<<20) |
| |
| int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt, |
| const char *filename, void *logctx, |
| unsigned int offset, unsigned int max_probe_size) |
| { |
| AVProbeData pd = { filename ? filename : "", NULL, -offset }; |
| unsigned char *buf = NULL; |
| int ret = 0, probe_size; |
| |
| if (!max_probe_size) { |
| max_probe_size = PROBE_BUF_MAX; |
| } else if (max_probe_size > PROBE_BUF_MAX) { |
| max_probe_size = PROBE_BUF_MAX; |
| } else if (max_probe_size < PROBE_BUF_MIN) { |
| return AVERROR(EINVAL); |
| } |
| |
| if (offset >= max_probe_size) { |
| return AVERROR(EINVAL); |
| } |
| |
| for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt && ret >= 0; |
| probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) { |
| int ret, score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX/4 : 0; |
| int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1; |
| void *buftmp; |
| |
| if (probe_size < offset) { |
| continue; |
| } |
| |
| /* read probe data */ |
| buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE); |
| if(!buftmp){ |
| av_free(buf); |
| return AVERROR(ENOMEM); |
| } |
| buf=buftmp; |
| if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) { |
| /* fail if error was not end of file, otherwise, lower score */ |
| if (ret != AVERROR_EOF) { |
| av_free(buf); |
| return ret; |
| } |
| score = 0; |
| ret = 0; /* error was end of file, nothing read */ |
| } |
| pd.buf_size += ret; |
| pd.buf = &buf[offset]; |
| |
| memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE); |
| |
| /* guess file format */ |
| *fmt = av_probe_input_format2(&pd, 1, &score); |
| if(*fmt){ |
| if(score <= AVPROBE_SCORE_MAX/4){ //this can only be true in the last iteration |
| av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score); |
| }else |
| av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score); |
| } |
| } |
| |
| if (!*fmt) { |
| av_free(buf); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| /* rewind. reuse probe buffer to avoid seeking */ |
| if ((ret = ffio_rewind_with_probe_data(pb, buf, pd.buf_size)) < 0) |
| av_free(buf); |
| |
| return ret; |
| } |
| |
| #if FF_API_FORMAT_PARAMETERS |
| int av_open_input_file(AVFormatContext **ic_ptr, const char *filename, |
| AVInputFormat *fmt, |
| int buf_size, |
| AVFormatParameters *ap) |
| { |
| int err; |
| AVDictionary *opts = convert_format_parameters(ap); |
| |
| if (!ap || !ap->prealloced_context) |
| *ic_ptr = NULL; |
| |
| err = avformat_open_input(ic_ptr, filename, fmt, &opts); |
| |
| av_dict_free(&opts); |
| return err; |
| } |
| #endif |
| |
| /* open input file and probe the format if necessary */ |
| static int init_input(AVFormatContext *s, const char *filename) |
| { |
| int ret; |
| AVProbeData pd = {filename, NULL, 0}; |
| |
| if (s->pb) { |
| s->flags |= AVFMT_FLAG_CUSTOM_IO; |
| if (!s->iformat) |
| return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0); |
| else if (s->iformat->flags & AVFMT_NOFILE) |
| return AVERROR(EINVAL); |
| return 0; |
| } |
| |
| if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) || |
| (!s->iformat && (s->iformat = av_probe_input_format(&pd, 0)))) |
| return 0; |
| |
| if ((ret = avio_open(&s->pb, filename, AVIO_FLAG_READ)) < 0) |
| return ret; |
| if (s->iformat) |
| return 0; |
| return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, 0); |
| } |
| |
| int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options) |
| { |
| AVFormatContext *s = *ps; |
| int ret = 0; |
| AVFormatParameters ap = { 0 }; |
| AVDictionary *tmp = NULL; |
| |
| if (!s && !(s = avformat_alloc_context())) |
| return AVERROR(ENOMEM); |
| if (fmt) |
| s->iformat = fmt; |
| |
| if (options) |
| av_dict_copy(&tmp, *options, 0); |
| |
| if ((ret = av_opt_set_dict(s, &tmp)) < 0) |
| goto fail; |
| |
| if ((ret = init_input(s, filename)) < 0) |
| goto fail; |
| |
| /* check filename in case an image number is expected */ |
| if (s->iformat->flags & AVFMT_NEEDNUMBER) { |
| if (!av_filename_number_test(filename)) { |
| ret = AVERROR(EINVAL); |
| goto fail; |
| } |
| } |
| |
| s->duration = s->start_time = AV_NOPTS_VALUE; |
| av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename)); |
| |
| /* allocate private data */ |
| if (s->iformat->priv_data_size > 0) { |
| if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| if (s->iformat->priv_class) { |
| *(const AVClass**)s->priv_data = s->iformat->priv_class; |
| av_opt_set_defaults(s->priv_data); |
| if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0) |
| goto fail; |
| } |
| } |
| |
| /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */ |
| if (s->pb) |
| ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC); |
| |
| if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header) |
| if ((ret = s->iformat->read_header(s, &ap)) < 0) |
| goto fail; |
| |
| if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset) |
| s->data_offset = avio_tell(s->pb); |
| |
| s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE; |
| |
| if (options) { |
| av_dict_free(options); |
| *options = tmp; |
| } |
| *ps = s; |
| return 0; |
| |
| fail: |
| av_dict_free(&tmp); |
| if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO)) |
| avio_close(s->pb); |
| avformat_free_context(s); |
| *ps = NULL; |
| return ret; |
| } |
| |
| /*******************************************************/ |
| |
| static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt, |
| AVPacketList **plast_pktl){ |
| AVPacketList *pktl = av_mallocz(sizeof(AVPacketList)); |
| if (!pktl) |
| return NULL; |
| |
| if (*packet_buffer) |
| (*plast_pktl)->next = pktl; |
| else |
| *packet_buffer = pktl; |
| |
| /* add the packet in the buffered packet list */ |
| *plast_pktl = pktl; |
| pktl->pkt= *pkt; |
| return &pktl->pkt; |
| } |
| |
| int av_read_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| int ret, i; |
| AVStream *st; |
| |
| for(;;){ |
| AVPacketList *pktl = s->raw_packet_buffer; |
| |
| if (pktl) { |
| *pkt = pktl->pkt; |
| if(s->streams[pkt->stream_index]->request_probe <= 0){ |
| s->raw_packet_buffer = pktl->next; |
| s->raw_packet_buffer_remaining_size += pkt->size; |
| av_free(pktl); |
| return 0; |
| } |
| } |
| |
| av_init_packet(pkt); |
| ret= s->iformat->read_packet(s, pkt); |
| if (ret < 0) { |
| if (!pktl || ret == AVERROR(EAGAIN)) |
| return ret; |
| for (i = 0; i < s->nb_streams; i++) |
| if(s->streams[i]->request_probe > 0) |
| s->streams[i]->request_probe = -1; |
| continue; |
| } |
| |
| if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA)) |
| av_packet_merge_side_data(pkt); |
| st= s->streams[pkt->stream_index]; |
| |
| switch(st->codec->codec_type){ |
| case AVMEDIA_TYPE_VIDEO: |
| if(s->video_codec_id) st->codec->codec_id= s->video_codec_id; |
| break; |
| case AVMEDIA_TYPE_AUDIO: |
| if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id; |
| break; |
| case AVMEDIA_TYPE_SUBTITLE: |
| if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id; |
| break; |
| } |
| |
| if(!pktl && st->request_probe <= 0) |
| return ret; |
| |
| add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end); |
| s->raw_packet_buffer_remaining_size -= pkt->size; |
| |
| if(st->request_probe>0){ |
| AVProbeData *pd = &st->probe_data; |
| int end; |
| av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets); |
| --st->probe_packets; |
| |
| pd->buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE); |
| memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size); |
| pd->buf_size += pkt->size; |
| memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE); |
| |
| end= s->raw_packet_buffer_remaining_size <= 0 |
| || st->probe_packets<=0; |
| |
| if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){ |
| int score= set_codec_from_probe_data(s, st, pd); |
| if( (st->codec->codec_id != CODEC_ID_NONE && score > AVPROBE_SCORE_MAX/4) |
| || end){ |
| pd->buf_size=0; |
| av_freep(&pd->buf); |
| st->request_probe= -1; |
| if(st->codec->codec_id != CODEC_ID_NONE){ |
| av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index); |
| }else |
| av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index); |
| } |
| } |
| } |
| } |
| } |
| |
| /**********************************************************/ |
| |
| /** |
| * Get the number of samples of an audio frame. Return -1 on error. |
| */ |
| static int get_audio_frame_size(AVCodecContext *enc, int size) |
| { |
| int frame_size; |
| |
| if(enc->codec_id == CODEC_ID_VORBIS) |
| return -1; |
| |
| if (enc->frame_size <= 1) { |
| int bits_per_sample = av_get_bits_per_sample(enc->codec_id); |
| |
| if (bits_per_sample) { |
| if (enc->channels == 0) |
| return -1; |
| frame_size = (size << 3) / (bits_per_sample * enc->channels); |
| } else { |
| /* used for example by ADPCM codecs */ |
| if (enc->bit_rate == 0) |
| return -1; |
| frame_size = ((int64_t)size * 8 * enc->sample_rate) / enc->bit_rate; |
| } |
| } else { |
| frame_size = enc->frame_size; |
| } |
| return frame_size; |
| } |
| |
| |
| /** |
| * Return the frame duration in seconds. Return 0 if not available. |
| */ |
| static void compute_frame_duration(int *pnum, int *pden, AVStream *st, |
| AVCodecParserContext *pc, AVPacket *pkt) |
| { |
| int frame_size; |
| |
| *pnum = 0; |
| *pden = 0; |
| switch(st->codec->codec_type) { |
| case AVMEDIA_TYPE_VIDEO: |
| if(st->time_base.num*1000LL > st->time_base.den){ |
| *pnum = st->time_base.num; |
| *pden = st->time_base.den; |
| }else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){ |
| *pnum = st->codec->time_base.num; |
| *pden = st->codec->time_base.den; |
| if (pc && pc->repeat_pict) { |
| if (*pnum > INT_MAX / (1 + pc->repeat_pict)) |
| *pden /= 1 + pc->repeat_pict; |
| else |
| *pnum *= 1 + pc->repeat_pict; |
| } |
| //If this codec can be interlaced or progressive then we need a parser to compute duration of a packet |
| //Thus if we have no parser in such case leave duration undefined. |
| if(st->codec->ticks_per_frame>1 && !pc){ |
| *pnum = *pden = 0; |
| } |
| } |
| break; |
| case AVMEDIA_TYPE_AUDIO: |
| frame_size = get_audio_frame_size(st->codec, pkt->size); |
| if (frame_size <= 0 || st->codec->sample_rate <= 0) |
| break; |
| *pnum = frame_size; |
| *pden = st->codec->sample_rate; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static int is_intra_only(AVCodecContext *enc){ |
| if(enc->codec_type == AVMEDIA_TYPE_AUDIO){ |
| return 1; |
| }else if(enc->codec_type == AVMEDIA_TYPE_VIDEO){ |
| switch(enc->codec_id){ |
| case CODEC_ID_MJPEG: |
| case CODEC_ID_MJPEGB: |
| case CODEC_ID_LJPEG: |
| case CODEC_ID_RAWVIDEO: |
| case CODEC_ID_DVVIDEO: |
| case CODEC_ID_HUFFYUV: |
| case CODEC_ID_FFVHUFF: |
| case CODEC_ID_ASV1: |
| case CODEC_ID_ASV2: |
| case CODEC_ID_VCR1: |
| case CODEC_ID_DNXHD: |
| case CODEC_ID_JPEG2000: |
| return 1; |
| default: break; |
| } |
| } |
| return 0; |
| } |
| |
| static void update_initial_timestamps(AVFormatContext *s, int stream_index, |
| int64_t dts, int64_t pts) |
| { |
| AVStream *st= s->streams[stream_index]; |
| AVPacketList *pktl= s->packet_buffer; |
| |
| if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE) |
| return; |
| |
| st->first_dts= dts - st->cur_dts; |
| st->cur_dts= dts; |
| |
| for(; pktl; pktl= pktl->next){ |
| if(pktl->pkt.stream_index != stream_index) |
| continue; |
| //FIXME think more about this check |
| if(pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts) |
| pktl->pkt.pts += st->first_dts; |
| |
| if(pktl->pkt.dts != AV_NOPTS_VALUE) |
| pktl->pkt.dts += st->first_dts; |
| |
| if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE) |
| st->start_time= pktl->pkt.pts; |
| } |
| if (st->start_time == AV_NOPTS_VALUE) |
| st->start_time = pts; |
| } |
| |
| static void update_initial_durations(AVFormatContext *s, AVStream *st, AVPacket *pkt) |
| { |
| AVPacketList *pktl= s->packet_buffer; |
| int64_t cur_dts= 0; |
| |
| if(st->first_dts != AV_NOPTS_VALUE){ |
| cur_dts= st->first_dts; |
| for(; pktl; pktl= pktl->next){ |
| if(pktl->pkt.stream_index == pkt->stream_index){ |
| if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration) |
| break; |
| cur_dts -= pkt->duration; |
| } |
| } |
| pktl= s->packet_buffer; |
| st->first_dts = cur_dts; |
| }else if(st->cur_dts) |
| return; |
| |
| for(; pktl; pktl= pktl->next){ |
| if(pktl->pkt.stream_index != pkt->stream_index) |
| continue; |
| if(pktl->pkt.pts == pktl->pkt.dts && pktl->pkt.dts == AV_NOPTS_VALUE |
| && !pktl->pkt.duration){ |
| pktl->pkt.dts= cur_dts; |
| if(!st->codec->has_b_frames) |
| pktl->pkt.pts= cur_dts; |
| cur_dts += pkt->duration; |
| pktl->pkt.duration= pkt->duration; |
| }else |
| break; |
| } |
| if(st->first_dts == AV_NOPTS_VALUE) |
| st->cur_dts= cur_dts; |
| } |
| |
| static void compute_pkt_fields(AVFormatContext *s, AVStream *st, |
| AVCodecParserContext *pc, AVPacket *pkt) |
| { |
| int num, den, presentation_delayed, delay, i; |
| int64_t offset; |
| |
| if (s->flags & AVFMT_FLAG_NOFILLIN) |
| return; |
| |
| if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE) |
| pkt->dts= AV_NOPTS_VALUE; |
| |
| if (st->codec->codec_id != CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B) |
| //FIXME Set low_delay = 0 when has_b_frames = 1 |
| st->codec->has_b_frames = 1; |
| |
| /* do we have a video B-frame ? */ |
| delay= st->codec->has_b_frames; |
| presentation_delayed = 0; |
| |
| // ignore delay caused by frame threading so that the mpeg2-without-dts |
| // warning will not trigger |
| if (delay && st->codec->active_thread_type&FF_THREAD_FRAME) |
| delay -= st->codec->thread_count-1; |
| |
| /* XXX: need has_b_frame, but cannot get it if the codec is |
| not initialized */ |
| if (delay && |
| pc && pc->pict_type != AV_PICTURE_TYPE_B) |
| presentation_delayed = 1; |
| |
| if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && pkt->dts > pkt->pts && st->pts_wrap_bits<63 |
| /*&& pkt->dts-(1LL<<st->pts_wrap_bits) < pkt->pts*/){ |
| pkt->dts -= 1LL<<st->pts_wrap_bits; |
| } |
| |
| // some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg) |
| // we take the conservative approach and discard both |
| // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly. |
| if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){ |
| av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %Ld\n", pkt->dts); |
| pkt->dts= pkt->pts= AV_NOPTS_VALUE; |
| } |
| |
| if (pkt->duration == 0) { |
| compute_frame_duration(&num, &den, st, pc, pkt); |
| if (den && num) { |
| pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN); |
| |
| if(pkt->duration != 0 && s->packet_buffer) |
| update_initial_durations(s, st, pkt); |
| } |
| } |
| |
| /* correct timestamps with byte offset if demuxers only have timestamps |
| on packet boundaries */ |
| if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){ |
| /* this will estimate bitrate based on this frame's duration and size */ |
| offset = av_rescale(pc->offset, pkt->duration, pkt->size); |
| if(pkt->pts != AV_NOPTS_VALUE) |
| pkt->pts += offset; |
| if(pkt->dts != AV_NOPTS_VALUE) |
| pkt->dts += offset; |
| } |
| |
| if (pc && pc->dts_sync_point >= 0) { |
| // we have synchronization info from the parser |
| int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num; |
| if (den > 0) { |
| int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den; |
| if (pkt->dts != AV_NOPTS_VALUE) { |
| // got DTS from the stream, update reference timestamp |
| st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den; |
| } else if (st->reference_dts != AV_NOPTS_VALUE) { |
| // compute DTS based on reference timestamp |
| pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den; |
| } |
| |
| if (st->reference_dts != AV_NOPTS_VALUE && pkt->pts == AV_NOPTS_VALUE) |
| pkt->pts = pkt->dts + pc->pts_dts_delta * num / den; |
| |
| if (pc->dts_sync_point > 0) |
| st->reference_dts = pkt->dts; // new reference |
| } |
| } |
| |
| /* This may be redundant, but it should not hurt. */ |
| if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts) |
| presentation_delayed = 1; |
| |
| // av_log(NULL, AV_LOG_DEBUG, "IN delayed:%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64" st:%d pc:%p\n", presentation_delayed, pkt->pts, pkt->dts, st->cur_dts, pkt->stream_index, pc); |
| /* interpolate PTS and DTS if they are not present */ |
| //We skip H264 currently because delay and has_b_frames are not reliably set |
| if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != CODEC_ID_H264){ |
| if (presentation_delayed) { |
| /* DTS = decompression timestamp */ |
| /* PTS = presentation timestamp */ |
| if (pkt->dts == AV_NOPTS_VALUE) |
| pkt->dts = st->last_IP_pts; |
| update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); |
| if (pkt->dts == AV_NOPTS_VALUE) |
| pkt->dts = st->cur_dts; |
| |
| /* this is tricky: the dts must be incremented by the duration |
| of the frame we are displaying, i.e. the last I- or P-frame */ |
| if (st->last_IP_duration == 0) |
| st->last_IP_duration = pkt->duration; |
| if(pkt->dts != AV_NOPTS_VALUE) |
| st->cur_dts = pkt->dts + st->last_IP_duration; |
| st->last_IP_duration = pkt->duration; |
| st->last_IP_pts= pkt->pts; |
| /* cannot compute PTS if not present (we can compute it only |
| by knowing the future */ |
| } else if(pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE || pkt->duration){ |
| if(pkt->pts != AV_NOPTS_VALUE && pkt->duration){ |
| int64_t old_diff= FFABS(st->cur_dts - pkt->duration - pkt->pts); |
| int64_t new_diff= FFABS(st->cur_dts - pkt->pts); |
| if(old_diff < new_diff && old_diff < (pkt->duration>>3)){ |
| pkt->pts += pkt->duration; |
| // av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%"PRId64" size:%d\n", pkt->stream_index, old_diff, new_diff, pkt->duration, st->cur_dts, pkt->size); |
| } |
| } |
| |
| /* presentation is not delayed : PTS and DTS are the same */ |
| if(pkt->pts == AV_NOPTS_VALUE) |
| pkt->pts = pkt->dts; |
| update_initial_timestamps(s, pkt->stream_index, pkt->pts, pkt->pts); |
| if(pkt->pts == AV_NOPTS_VALUE) |
| pkt->pts = st->cur_dts; |
| pkt->dts = pkt->pts; |
| if(pkt->pts != AV_NOPTS_VALUE) |
| st->cur_dts = pkt->pts + pkt->duration; |
| } |
| } |
| |
| if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){ |
| st->pts_buffer[0]= pkt->pts; |
| for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++) |
| FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]); |
| if(pkt->dts == AV_NOPTS_VALUE) |
| pkt->dts= st->pts_buffer[0]; |
| if(st->codec->codec_id == CODEC_ID_H264){ //we skiped it above so we try here |
| update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet |
| } |
| if(pkt->dts > st->cur_dts) |
| st->cur_dts = pkt->dts; |
| } |
| |
| // av_log(NULL, AV_LOG_ERROR, "OUTdelayed:%d/%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64"\n", presentation_delayed, delay, pkt->pts, pkt->dts, st->cur_dts); |
| |
| /* update flags */ |
| if(is_intra_only(st->codec)) |
| pkt->flags |= AV_PKT_FLAG_KEY; |
| else if (pc) { |
| pkt->flags = 0; |
| /* keyframe computation */ |
| if (pc->key_frame == 1) |
| pkt->flags |= AV_PKT_FLAG_KEY; |
| else if (pc->key_frame == -1 && pc->pict_type == AV_PICTURE_TYPE_I) |
| pkt->flags |= AV_PKT_FLAG_KEY; |
| } |
| if (pc) |
| pkt->convergence_duration = pc->convergence_duration; |
| } |
| |
| |
| static int av_read_frame_internal(AVFormatContext *s, AVPacket *pkt) |
| { |
| AVStream *st; |
| int len, ret, i; |
| |
| av_init_packet(pkt); |
| |
| for(;;) { |
| /* select current input stream component */ |
| st = s->cur_st; |
| if (st) { |
| if (!st->need_parsing || !st->parser) { |
| /* no parsing needed: we just output the packet as is */ |
| /* raw data support */ |
| *pkt = st->cur_pkt; |
| st->cur_pkt.data= NULL; |
| st->cur_pkt.side_data_elems = 0; |
| st->cur_pkt.side_data = NULL; |
| compute_pkt_fields(s, st, NULL, pkt); |
| s->cur_st = NULL; |
| if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && |
| (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) { |
| ff_reduce_index(s, st->index); |
| av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME); |
| } |
| break; |
| } else if (st->cur_len > 0 && st->discard < AVDISCARD_ALL) { |
| len = av_parser_parse2(st->parser, st->codec, &pkt->data, &pkt->size, |
| st->cur_ptr, st->cur_len, |
| st->cur_pkt.pts, st->cur_pkt.dts, |
| st->cur_pkt.pos); |
| st->cur_pkt.pts = AV_NOPTS_VALUE; |
| st->cur_pkt.dts = AV_NOPTS_VALUE; |
| /* increment read pointer */ |
| st->cur_ptr += len; |
| st->cur_len -= len; |
| |
| /* return packet if any */ |
| if (pkt->size) { |
| got_packet: |
| pkt->duration = 0; |
| pkt->stream_index = st->index; |
| pkt->pts = st->parser->pts; |
| pkt->dts = st->parser->dts; |
| pkt->pos = st->parser->pos; |
| if(pkt->data == st->cur_pkt.data && pkt->size == st->cur_pkt.size){ |
| s->cur_st = NULL; |
| pkt->destruct= st->cur_pkt.destruct; |
| st->cur_pkt.destruct= NULL; |
| st->cur_pkt.data = NULL; |
| assert(st->cur_len == 0); |
| }else{ |
| pkt->destruct = NULL; |
| } |
| compute_pkt_fields(s, st, st->parser, pkt); |
| |
| if((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY){ |
| int64_t pos= (st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) ? pkt->pos : st->parser->frame_offset; |
| ff_reduce_index(s, st->index); |
| av_add_index_entry(st, pos, pkt->dts, |
| 0, 0, AVINDEX_KEYFRAME); |
| } |
| |
| break; |
| } |
| } else { |
| /* free packet */ |
| av_free_packet(&st->cur_pkt); |
| s->cur_st = NULL; |
| } |
| } else { |
| AVPacket cur_pkt; |
| /* read next packet */ |
| ret = av_read_packet(s, &cur_pkt); |
| if (ret < 0) { |
| if (ret == AVERROR(EAGAIN)) |
| return ret; |
| /* return the last frames, if any */ |
| for(i = 0; i < s->nb_streams; i++) { |
| st = s->streams[i]; |
| if (st->parser && st->need_parsing) { |
| av_parser_parse2(st->parser, st->codec, |
| &pkt->data, &pkt->size, |
| NULL, 0, |
| AV_NOPTS_VALUE, AV_NOPTS_VALUE, |
| AV_NOPTS_VALUE); |
| if (pkt->size) |
| goto got_packet; |
| } |
| } |
| /* no more packets: really terminate parsing */ |
| return ret; |
| } |
| st = s->streams[cur_pkt.stream_index]; |
| st->cur_pkt= cur_pkt; |
| |
| if(st->cur_pkt.pts != AV_NOPTS_VALUE && |
| st->cur_pkt.dts != AV_NOPTS_VALUE && |
| st->cur_pkt.pts < st->cur_pkt.dts){ |
| av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d\n", |
| st->cur_pkt.stream_index, |
| st->cur_pkt.pts, |
| st->cur_pkt.dts, |
| st->cur_pkt.size); |
| // av_free_packet(&st->cur_pkt); |
| // return -1; |
| } |
| |
| if(s->debug & FF_FDEBUG_TS) |
| av_log(s, AV_LOG_DEBUG, "av_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n", |
| st->cur_pkt.stream_index, |
| st->cur_pkt.pts, |
| st->cur_pkt.dts, |
| st->cur_pkt.size, |
| st->cur_pkt.duration, |
| st->cur_pkt.flags); |
| |
| s->cur_st = st; |
| st->cur_ptr = st->cur_pkt.data; |
| st->cur_len = st->cur_pkt.size; |
| if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) { |
| st->parser = av_parser_init(st->codec->codec_id); |
| if (!st->parser) { |
| /* no parser available: just output the raw packets */ |
| st->need_parsing = AVSTREAM_PARSE_NONE; |
| }else if(st->need_parsing == AVSTREAM_PARSE_HEADERS){ |
| st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES; |
| }else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE){ |
| st->parser->flags |= PARSER_FLAG_ONCE; |
| } |
| } |
| } |
| } |
| if(s->debug & FF_FDEBUG_TS) |
| av_log(s, AV_LOG_DEBUG, "av_read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", size=%d, duration=%d, flags=%d\n", |
| pkt->stream_index, |
| pkt->pts, |
| pkt->dts, |
| pkt->size, |
| pkt->duration, |
| pkt->flags); |
| |
| return 0; |
| } |
| |
| int av_read_frame(AVFormatContext *s, AVPacket *pkt) |
| { |
| AVPacketList *pktl; |
| int eof=0; |
| const int genpts= s->flags & AVFMT_FLAG_GENPTS; |
| |
| for(;;){ |
| pktl = s->packet_buffer; |
| if (pktl) { |
| AVPacket *next_pkt= &pktl->pkt; |
| |
| if(genpts && next_pkt->dts != AV_NOPTS_VALUE){ |
| int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits; |
| while(pktl && next_pkt->pts == AV_NOPTS_VALUE){ |
| if( pktl->pkt.stream_index == next_pkt->stream_index |
| && (0 > av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) |
| && av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame |
| next_pkt->pts= pktl->pkt.dts; |
| } |
| pktl= pktl->next; |
| } |
| pktl = s->packet_buffer; |
| } |
| |
| if( next_pkt->pts != AV_NOPTS_VALUE |
| || next_pkt->dts == AV_NOPTS_VALUE |
| || !genpts || eof){ |
| /* read packet from packet buffer, if there is data */ |
| *pkt = *next_pkt; |
| s->packet_buffer = pktl->next; |
| av_free(pktl); |
| return 0; |
| } |
| } |
| if(genpts){ |
| int ret= av_read_frame_internal(s, pkt); |
| if(ret<0){ |
| if(pktl && ret != AVERROR(EAGAIN)){ |
| eof=1; |
| continue; |
| }else |
| return ret; |
| } |
| |
| if(av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt, |
| &s->packet_buffer_end)) < 0) |
| return AVERROR(ENOMEM); |
| }else{ |
| assert(!s->packet_buffer); |
| return av_read_frame_internal(s, pkt); |
| } |
| } |
| } |
| |
| /* XXX: suppress the packet queue */ |
| static void flush_packet_queue(AVFormatContext *s) |
| { |
| AVPacketList *pktl; |
| |
| for(;;) { |
| pktl = s->packet_buffer; |
| if (!pktl) |
| break; |
| s->packet_buffer = pktl->next; |
| av_free_packet(&pktl->pkt); |
| av_free(pktl); |
| } |
| while(s->raw_packet_buffer){ |
| pktl = s->raw_packet_buffer; |
| s->raw_packet_buffer = pktl->next; |
| av_free_packet(&pktl->pkt); |
| av_free(pktl); |
| } |
| s->packet_buffer_end= |
| s->raw_packet_buffer_end= NULL; |
| s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE; |
| } |
| |
| /*******************************************************/ |
| /* seek support */ |
| |
| int av_find_default_stream_index(AVFormatContext *s) |
| { |
| int first_audio_index = -1; |
| int i; |
| AVStream *st; |
| |
| if (s->nb_streams <= 0) |
| return -1; |
| for(i = 0; i < s->nb_streams; i++) { |
| st = s->streams[i]; |
| if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
| return i; |
| } |
| if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO) |
| first_audio_index = i; |
| } |
| return first_audio_index >= 0 ? first_audio_index : 0; |
| } |
| |
| /** |
| * Flush the frame reader. |
| */ |
| void ff_read_frame_flush(AVFormatContext *s) |
| { |
| AVStream *st; |
| int i, j; |
| |
| flush_packet_queue(s); |
| |
| s->cur_st = NULL; |
| |
| /* for each stream, reset read state */ |
| for(i = 0; i < s->nb_streams; i++) { |
| st = s->streams[i]; |
| |
| if (st->parser) { |
| av_parser_close(st->parser); |
| st->parser = NULL; |
| av_free_packet(&st->cur_pkt); |
| } |
| st->last_IP_pts = AV_NOPTS_VALUE; |
| st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */ |
| st->reference_dts = AV_NOPTS_VALUE; |
| /* fail safe */ |
| st->cur_ptr = NULL; |
| st->cur_len = 0; |
| |
| st->probe_packets = MAX_PROBE_PACKETS; |
| |
| for(j=0; j<MAX_REORDER_DELAY+1; j++) |
| st->pts_buffer[j]= AV_NOPTS_VALUE; |
| } |
| } |
| |
| void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp){ |
| int i; |
| |
| for(i = 0; i < s->nb_streams; i++) { |
| AVStream *st = s->streams[i]; |
| |
| st->cur_dts = av_rescale(timestamp, |
| st->time_base.den * (int64_t)ref_st->time_base.num, |
| st->time_base.num * (int64_t)ref_st->time_base.den); |
| } |
| } |
| |
| void ff_reduce_index(AVFormatContext *s, int stream_index) |
| { |
| AVStream *st= s->streams[stream_index]; |
| unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry); |
| |
| if((unsigned)st->nb_index_entries >= max_entries){ |
| int i; |
| for(i=0; 2*i<st->nb_index_entries; i++) |
| st->index_entries[i]= st->index_entries[2*i]; |
| st->nb_index_entries= i; |
| } |
| } |
| |
| int ff_add_index_entry(AVIndexEntry **index_entries, |
| int *nb_index_entries, |
| unsigned int *index_entries_allocated_size, |
| int64_t pos, int64_t timestamp, int size, int distance, int flags) |
| { |
| AVIndexEntry *entries, *ie; |
| int index; |
| |
| if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry)) |
| return -1; |
| |
| entries = av_fast_realloc(*index_entries, |
| index_entries_allocated_size, |
| (*nb_index_entries + 1) * |
| sizeof(AVIndexEntry)); |
| if(!entries) |
| return -1; |
| |
| *index_entries= entries; |
| |
| index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY); |
| |
| if(index<0){ |
| index= (*nb_index_entries)++; |
| ie= &entries[index]; |
| assert(index==0 || ie[-1].timestamp < timestamp); |
| }else{ |
| ie= &entries[index]; |
| if(ie->timestamp != timestamp){ |
| if(ie->timestamp <= timestamp) |
| return -1; |
| memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index)); |
| (*nb_index_entries)++; |
| }else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance |
| distance= ie->min_distance; |
| } |
| |
| ie->pos = pos; |
| ie->timestamp = timestamp; |
| ie->min_distance= distance; |
| ie->size= size; |
| ie->flags = flags; |
| |
| return index; |
| } |
| |
| int av_add_index_entry(AVStream *st, |
| int64_t pos, int64_t timestamp, int size, int distance, int flags) |
| { |
| return ff_add_index_entry(&st->index_entries, &st->nb_index_entries, |
| &st->index_entries_allocated_size, pos, |
| timestamp, size, distance, flags); |
| } |
| |
| int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries, |
| int64_t wanted_timestamp, int flags) |
| { |
| int a, b, m; |
| int64_t timestamp; |
| |
| a = - 1; |
| b = nb_entries; |
| |
| //optimize appending index entries at the end |
| if(b && entries[b-1].timestamp < wanted_timestamp) |
| a= b-1; |
| |
| while (b - a > 1) { |
| m = (a + b) >> 1; |
| timestamp = entries[m].timestamp; |
| if(timestamp >= wanted_timestamp) |
| b = m; |
| if(timestamp <= wanted_timestamp) |
| a = m; |
| } |
| m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b; |
| |
| if(!(flags & AVSEEK_FLAG_ANY)){ |
| while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){ |
| m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1; |
| } |
| } |
| |
| if(m == nb_entries) |
| return -1; |
| return m; |
| } |
| |
| int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp, |
| int flags) |
| { |
| return ff_index_search_timestamp(st->index_entries, st->nb_index_entries, |
| wanted_timestamp, flags); |
| } |
| |
| int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags){ |
| AVInputFormat *avif= s->iformat; |
| int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit; |
| int64_t ts_min, ts_max, ts; |
| int index; |
| int64_t ret; |
| AVStream *st; |
| |
| if (stream_index < 0) |
| return -1; |
| |
| av_dlog(s, "read_seek: %d %"PRId64"\n", stream_index, target_ts); |
| |
| ts_max= |
| ts_min= AV_NOPTS_VALUE; |
| pos_limit= -1; //gcc falsely says it may be uninitialized |
| |
| st= s->streams[stream_index]; |
| if(st->index_entries){ |
| AVIndexEntry *e; |
| |
| index= av_index_search_timestamp(st, target_ts, flags | AVSEEK_FLAG_BACKWARD); //FIXME whole func must be checked for non-keyframe entries in index case, especially read_timestamp() |
| index= FFMAX(index, 0); |
| e= &st->index_entries[index]; |
| |
| if(e->timestamp <= target_ts || e->pos == e->min_distance){ |
| pos_min= e->pos; |
| ts_min= e->timestamp; |
| av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n", |
| pos_min,ts_min); |
| }else{ |
| assert(index==0); |
| } |
| |
| index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD); |
| assert(index < st->nb_index_entries); |
| if(index >= 0){ |
| e= &st->index_entries[index]; |
| assert(e->timestamp >= target_ts); |
| pos_max= e->pos; |
| ts_max= e->timestamp; |
| pos_limit= pos_max - e->min_distance; |
| av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%"PRId64"\n", |
| pos_max,pos_limit, ts_max); |
| } |
| } |
| |
| pos= av_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp); |
| if(pos<0) |
| return -1; |
| |
| /* do the seek */ |
| if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0) |
| return ret; |
| |
| av_update_cur_dts(s, st, ts); |
| |
| return 0; |
| } |
| |
| int64_t av_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )){ |
| int64_t pos, ts; |
| int64_t start_pos, filesize; |
| int no_change; |
| |
| av_dlog(s, "gen_seek: %d %"PRId64"\n", stream_index, target_ts); |
| |
| if(ts_min == AV_NOPTS_VALUE){ |
| pos_min = s->data_offset; |
| ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX); |
| if (ts_min == AV_NOPTS_VALUE) |
| return -1; |
| } |
| |
| if(ts_max == AV_NOPTS_VALUE){ |
| int step= 1024; |
| filesize = avio_size(s->pb); |
| pos_max = filesize - 1; |
| do{ |
| pos_max -= step; |
| ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step); |
| step += step; |
| }while(ts_max == AV_NOPTS_VALUE && pos_max >= step); |
| if (ts_max == AV_NOPTS_VALUE) |
| return -1; |
| |
| for(;;){ |
| int64_t tmp_pos= pos_max + 1; |
| int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX); |
| if(tmp_ts == AV_NOPTS_VALUE) |
| break; |
| ts_max= tmp_ts; |
| pos_max= tmp_pos; |
| if(tmp_pos >= filesize) |
| break; |
| } |
| pos_limit= pos_max; |
| } |
| |
| if(ts_min > ts_max){ |
| return -1; |
| }else if(ts_min == ts_max){ |
| pos_limit= pos_min; |
| } |
| |
| no_change=0; |
| while (pos_min < pos_limit) { |
| av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64" dts_max=%"PRId64"\n", |
| pos_min, pos_max, ts_min, ts_max); |
| assert(pos_limit <= pos_max); |
| |
| if(no_change==0){ |
| int64_t approximate_keyframe_distance= pos_max - pos_limit; |
| // interpolate position (better than dichotomy) |
| pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min) |
| + pos_min - approximate_keyframe_distance; |
| }else if(no_change==1){ |
| // bisection, if interpolation failed to change min or max pos last time |
| pos = (pos_min + pos_limit)>>1; |
| }else{ |
| /* linear search if bisection failed, can only happen if there |
| are very few or no keyframes between min/max */ |
| pos=pos_min; |
| } |
| if(pos <= pos_min) |
| pos= pos_min + 1; |
| else if(pos > pos_limit) |
| pos= pos_limit; |
| start_pos= pos; |
| |
| ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1 |
| if(pos == pos_max) |
| no_change++; |
| else |
| no_change=0; |
| av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n", |
| pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts, |
| pos_limit, start_pos, no_change); |
| if(ts == AV_NOPTS_VALUE){ |
| av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n"); |
| return -1; |
| } |
| assert(ts != AV_NOPTS_VALUE); |
| if (target_ts <= ts) { |
| pos_limit = start_pos - 1; |
| pos_max = pos; |
| ts_max = ts; |
| } |
| if (target_ts >= ts) { |
| pos_min = pos; |
| ts_min = ts; |
| } |
| } |
| |
| pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max; |
| ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max; |
| pos_min = pos; |
| ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX); |
| pos_min++; |
| ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX); |
| av_dlog(s, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n", |
| pos, ts_min, target_ts, ts_max); |
| *ts_ret= ts; |
| return pos; |
| } |
| |
| static int av_seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){ |
| int64_t pos_min, pos_max; |
| #if 0 |
| AVStream *st; |
| |
| if (stream_index < 0) |
| return -1; |
| |
| st= s->streams[stream_index]; |
| #endif |
| |
| pos_min = s->data_offset; |
| pos_max = avio_size(s->pb) - 1; |
| |
| if (pos < pos_min) pos= pos_min; |
| else if(pos > pos_max) pos= pos_max; |
| |
| avio_seek(s->pb, pos, SEEK_SET); |
| |
| #if 0 |
| av_update_cur_dts(s, st, ts); |
| #endif |
| return 0; |
| } |
| |
| static int av_seek_frame_generic(AVFormatContext *s, |
| int stream_index, int64_t timestamp, int flags) |
| { |
| int index; |
| int64_t ret; |
| AVStream *st; |
| AVIndexEntry *ie; |
| |
| st = s->streams[stream_index]; |
| |
| index = av_index_search_timestamp(st, timestamp, flags); |
| |
| if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp) |
| return -1; |
| |
| if(index < 0 || index==st->nb_index_entries-1){ |
| int i; |
| AVPacket pkt; |
| |
| if(st->nb_index_entries){ |
| assert(st->index_entries); |
| ie= &st->index_entries[st->nb_index_entries-1]; |
| if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0) |
| return ret; |
| av_update_cur_dts(s, st, ie->timestamp); |
| }else{ |
| if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0) |
| return ret; |
| } |
| for(i=0;; i++) { |
| int ret; |
| do{ |
| ret = av_read_frame(s, &pkt); |
| }while(ret == AVERROR(EAGAIN)); |
| if(ret<0) |
| break; |
| av_free_packet(&pkt); |
| if(stream_index == pkt.stream_index){ |
| if((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp) |
| break; |
| } |
| } |
| index = av_index_search_timestamp(st, timestamp, flags); |
| } |
| if (index < 0) |
| return -1; |
| |
| ff_read_frame_flush(s); |
| if (s->iformat->read_seek){ |
| if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0) |
| return 0; |
| } |
| ie = &st->index_entries[index]; |
| if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0) |
| return ret; |
| av_update_cur_dts(s, st, ie->timestamp); |
| |
| return 0; |
| } |
| |
| int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) |
| { |
| int ret; |
| AVStream *st; |
| |
| ff_read_frame_flush(s); |
| |
| if(flags & AVSEEK_FLAG_BYTE) |
| return av_seek_frame_byte(s, stream_index, timestamp, flags); |
| |
| if(stream_index < 0){ |
| stream_index= av_find_default_stream_index(s); |
| if(stream_index < 0) |
| return -1; |
| |
| st= s->streams[stream_index]; |
| /* timestamp for default must be expressed in AV_TIME_BASE units */ |
| timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num); |
| } |
| |
| /* first, we try the format specific seek */ |
| if (s->iformat->read_seek) |
| ret = s->iformat->read_seek(s, stream_index, timestamp, flags); |
| else |
| ret = -1; |
| if (ret >= 0) { |
| return 0; |
| } |
| |
| if(s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) |
| return av_seek_frame_binary(s, stream_index, timestamp, flags); |
| else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) |
| return av_seek_frame_generic(s, stream_index, timestamp, flags); |
| else |
| return -1; |
| } |
| |
| int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags) |
| { |
| if(min_ts > ts || max_ts < ts) |
| return -1; |
| |
| ff_read_frame_flush(s); |
| |
| if (s->iformat->read_seek2) |
| return s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags); |
| |
| if(s->iformat->read_timestamp){ |
| //try to seek via read_timestamp() |
| } |
| |
| //Fallback to old API if new is not implemented but old is |
| //Note the old has somewat different sematics |
| if(s->iformat->read_seek || 1) |
| return av_seek_frame(s, stream_index, ts, flags | ((uint64_t)ts - min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0)); |
| |
| // try some generic seek like av_seek_frame_generic() but with new ts semantics |
| } |
| |
| /*******************************************************/ |
| |
| /** |
| * Return TRUE if the stream has accurate duration in any stream. |
| * |
| * @return TRUE if the stream has accurate duration for at least one component. |
| */ |
| static int av_has_duration(AVFormatContext *ic) |
| { |
| int i; |
| AVStream *st; |
| |
| for(i = 0;i < ic->nb_streams; i++) { |
| st = ic->streams[i]; |
| if (st->duration != AV_NOPTS_VALUE) |
| return 1; |
| } |
| return 0; |
| } |
| |
| /** |
| * Estimate the stream timings from the one of each components. |
| * |
| * Also computes the global bitrate if possible. |
| */ |
| static void av_update_stream_timings(AVFormatContext *ic) |
| { |
| int64_t start_time, start_time1, start_time_text, end_time, end_time1; |
| int64_t duration, duration1; |
| int i; |
| AVStream *st; |
| |
| start_time = INT64_MAX; |
| start_time_text = INT64_MAX; |
| end_time = INT64_MIN; |
| duration = INT64_MIN; |
| for(i = 0;i < ic->nb_streams; i++) { |
| st = ic->streams[i]; |
| if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) { |
| start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q); |
| if (st->codec->codec_id == CODEC_ID_DVB_TELETEXT) { |
| if (start_time1 < start_time_text) |
| start_time_text = start_time1; |
| } else |
| if (start_time1 < start_time) |
| start_time = start_time1; |
| if (st->duration != AV_NOPTS_VALUE) { |
| end_time1 = start_time1 |
| + av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q); |
| if (end_time1 > end_time) |
| end_time = end_time1; |
| } |
| } |
| if (st->duration != AV_NOPTS_VALUE) { |
| duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q); |
| if (duration1 > duration) |
| duration = duration1; |
| } |
| } |
| if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE)) |
| start_time = start_time_text; |
| if (start_time != INT64_MAX) { |
| ic->start_time = start_time; |
| if (end_time != INT64_MIN) { |
| if (end_time - start_time > duration) |
| duration = end_time - start_time; |
| } |
| } |
| if (duration != INT64_MIN) { |
| ic->duration = duration; |
| if (ic->file_size > 0) { |
| /* compute the bitrate */ |
| ic->bit_rate = (double)ic->file_size * 8.0 * AV_TIME_BASE / |
| (double)ic->duration; |
| } |
| } |
| } |
| |
| static void fill_all_stream_timings(AVFormatContext *ic) |
| { |
| int i; |
| AVStream *st; |
| |
| av_update_stream_timings(ic); |
| for(i = 0;i < ic->nb_streams; i++) { |
| st = ic->streams[i]; |
| if (st->start_time == AV_NOPTS_VALUE) { |
| if(ic->start_time != AV_NOPTS_VALUE) |
| st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base); |
| if(ic->duration != AV_NOPTS_VALUE) |
| st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base); |
| } |
| } |
| } |
| |
| static void av_estimate_timings_from_bit_rate(AVFormatContext *ic) |
| { |
| int64_t filesize, duration; |
| int bit_rate, i; |
| AVStream *st; |
| |
| /* if bit_rate is already set, we believe it */ |
| if (ic->bit_rate <= 0) { |
| bit_rate = 0; |
| for(i=0;i<ic->nb_streams;i++) { |
| st = ic->streams[i]; |
| if (st->codec->bit_rate > 0) |
| bit_rate += st->codec->bit_rate; |
| } |
| ic->bit_rate = bit_rate; |
| } |
| |
| /* if duration is already set, we believe it */ |
| if (ic->duration == AV_NOPTS_VALUE && |
| ic->bit_rate != 0 && |
| ic->file_size != 0) { |
| filesize = ic->file_size; |
| if (filesize > 0) { |
| for(i = 0; i < ic->nb_streams; i++) { |
| st = ic->streams[i]; |
| duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num); |
| if (st->duration == AV_NOPTS_VALUE) |
| st->duration = duration; |
| } |
| } |
| } |
| } |
| |
| #define DURATION_MAX_READ_SIZE 250000 |
| #define DURATION_MAX_RETRY 3 |
| |
| /* only usable for MPEG-PS streams */ |
| static void av_estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset) |
| { |
| AVPacket pkt1, *pkt = &pkt1; |
| AVStream *st; |
| int read_size, i, ret; |
| int64_t end_time; |
| int64_t filesize, offset, duration; |
| int retry=0; |
| |
| ic->cur_st = NULL; |
| |
| /* flush packet queue */ |
| flush_packet_queue(ic); |
| |
| for (i=0; i<ic->nb_streams; i++) { |
| st = ic->streams[i]; |
| if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE) |
| av_log(st->codec, AV_LOG_WARNING, "start time is not set in av_estimate_timings_from_pts\n"); |
| |
| if (st->parser) { |
| av_parser_close(st->parser); |
| st->parser= NULL; |
| av_free_packet(&st->cur_pkt); |
| } |
| } |
| |
| /* estimate the end time (duration) */ |
| /* XXX: may need to support wrapping */ |
| filesize = ic->file_size; |
| end_time = AV_NOPTS_VALUE; |
| do{ |
| offset = filesize - (DURATION_MAX_READ_SIZE<<retry); |
| if (offset < 0) |
| offset = 0; |
| |
| avio_seek(ic->pb, offset, SEEK_SET); |
| read_size = 0; |
| for(;;) { |
| if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0))) |
| break; |
| |
| do{ |
| ret = av_read_packet(ic, pkt); |
| }while(ret == AVERROR(EAGAIN)); |
| if (ret != 0) |
| break; |
| read_size += pkt->size; |
| st = ic->streams[pkt->stream_index]; |
| if (pkt->pts != AV_NOPTS_VALUE && |
| (st->start_time != AV_NOPTS_VALUE || |
| st->first_dts != AV_NOPTS_VALUE)) { |
| duration = end_time = pkt->pts; |
| if (st->start_time != AV_NOPTS_VALUE) duration -= st->start_time; |
| else duration -= st->first_dts; |
| if (duration < 0) |
| duration += 1LL<<st->pts_wrap_bits; |
| if (duration > 0) { |
| if (st->duration == AV_NOPTS_VALUE || |
| st->duration < duration) |
| st->duration = duration; |
| } |
| } |
| av_free_packet(pkt); |
| } |
| }while( end_time==AV_NOPTS_VALUE |
| && filesize > (DURATION_MAX_READ_SIZE<<retry) |
| && ++retry <= DURATION_MAX_RETRY); |
| |
| fill_all_stream_timings(ic); |
| |
| avio_seek(ic->pb, old_offset, SEEK_SET); |
| for (i=0; i<ic->nb_streams; i++) { |
| st= ic->streams[i]; |
| st->cur_dts= st->first_dts; |
| st->last_IP_pts = AV_NOPTS_VALUE; |
| st->reference_dts = AV_NOPTS_VALUE; |
| } |
| } |
| |
| static void av_estimate_timings(AVFormatContext *ic, int64_t old_offset) |
| { |
| int64_t file_size; |
| |
| /* get the file size, if possible */ |
| if (ic->iformat->flags & AVFMT_NOFILE) { |
| file_size = 0; |
| } else { |
| file_size = avio_size(ic->pb); |
| if (file_size < 0) |
| file_size = 0; |
| } |
| ic->file_size = file_size; |
| |
| if ((!strcmp(ic->iformat->name, "mpeg") || |
| !strcmp(ic->iformat->name, "mpegts")) && |
| file_size && ic->pb->seekable) { |
| /* get accurate estimate from the PTSes */ |
| av_estimate_timings_from_pts(ic, old_offset); |
| } else if (av_has_duration(ic)) { |
| /* at least one component has timings - we use them for all |
| the components */ |
| fill_all_stream_timings(ic); |
| } else { |
| av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n"); |
| /* less precise: use bitrate info */ |
| av_estimate_timings_from_bit_rate(ic); |
| } |
| av_update_stream_timings(ic); |
| |
| #if 0 |
| { |
| int i; |
| AVStream av_unused *st; |
| for(i = 0;i < ic->nb_streams; i++) { |
| st = ic->streams[i]; |
| printf("%d: start_time: %0.3f duration: %0.3f\n", |
| i, (double)st->start_time / AV_TIME_BASE, |
| (double)st->duration / AV_TIME_BASE); |
| } |
| printf("stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n", |
| (double)ic->start_time / AV_TIME_BASE, |
| (double)ic->duration / AV_TIME_BASE, |
| ic->bit_rate / 1000); |
| } |
| #endif |
| } |
| |
| static int has_codec_parameters(AVCodecContext *enc) |
| { |
| int val; |
| switch(enc->codec_type) { |
| case AVMEDIA_TYPE_AUDIO: |
| val = enc->sample_rate && enc->channels && enc->sample_fmt != AV_SAMPLE_FMT_NONE; |
| if(!enc->frame_size && |
| (enc->codec_id == CODEC_ID_VORBIS || |
| enc->codec_id == CODEC_ID_AAC || |
| enc->codec_id == CODEC_ID_MP1 || |
| enc->codec_id == CODEC_ID_MP2 || |
| enc->codec_id == CODEC_ID_MP3 || |
| enc->codec_id == CODEC_ID_SPEEX || |
| enc->codec_id == CODEC_ID_CELT)) |
| return 0; |
| break; |
| case AVMEDIA_TYPE_VIDEO: |
| val = enc->width && enc->pix_fmt != PIX_FMT_NONE; |
| break; |
| default: |
| val = 1; |
| break; |
| } |
| return enc->codec_id != CODEC_ID_NONE && val != 0; |
| } |
| |
| static int has_decode_delay_been_guessed(AVStream *st) |
| { |
| return st->codec->codec_id != CODEC_ID_H264 || |
| st->codec_info_nb_frames >= 6 + st->codec->has_b_frames; |
| } |
| |
| static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options) |
| { |
| int16_t *samples; |
| AVCodec *codec; |
| int got_picture, data_size, ret=0; |
| AVFrame picture; |
| |
| if(!st->codec->codec){ |
| codec = avcodec_find_decoder(st->codec->codec_id); |
| if (!codec) |
| return -1; |
| ret = avcodec_open2(st->codec, codec, options); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if(!has_codec_parameters(st->codec) || !has_decode_delay_been_guessed(st)){ |
| switch(st->codec->codec_type) { |
| case AVMEDIA_TYPE_VIDEO: |
| avcodec_get_frame_defaults(&picture); |
| ret = avcodec_decode_video2(st->codec, &picture, |
| &got_picture, avpkt); |
| break; |
| case AVMEDIA_TYPE_AUDIO: |
| data_size = FFMAX(avpkt->size, AVCODEC_MAX_AUDIO_FRAME_SIZE); |
| samples = av_malloc(data_size); |
| if (!samples) |
| goto fail; |
| ret = avcodec_decode_audio3(st->codec, samples, |
| &data_size, avpkt); |
| av_free(samples); |
| break; |
| default: |
| break; |
| } |
| } |
| fail: |
| return ret; |
| } |
| |
| unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum CodecID id) |
| { |
| while (tags->id != CODEC_ID_NONE) { |
| if (tags->id == id) |
| return tags->tag; |
| tags++; |
| } |
| return 0; |
| } |
| |
| enum CodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag) |
| { |
| int i; |
| for(i=0; tags[i].id != CODEC_ID_NONE;i++) { |
| if(tag == tags[i].tag) |
| return tags[i].id; |
| } |
| for(i=0; tags[i].id != CODEC_ID_NONE; i++) { |
| if (ff_toupper4(tag) == ff_toupper4(tags[i].tag)) |
| return tags[i].id; |
| } |
| return CODEC_ID_NONE; |
| } |
| |
| unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum CodecID id) |
| { |
| int i; |
| for(i=0; tags && tags[i]; i++){ |
| int tag= ff_codec_get_tag(tags[i], id); |
| if(tag) return tag; |
| } |
| return 0; |
| } |
| |
| enum CodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag) |
| { |
| int i; |
| for(i=0; tags && tags[i]; i++){ |
| enum CodecID id= ff_codec_get_id(tags[i], tag); |
| if(id!=CODEC_ID_NONE) return id; |
| } |
| return CODEC_ID_NONE; |
| } |
| |
| static void compute_chapters_end(AVFormatContext *s) |
| { |
| unsigned int i, j; |
| int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time); |
| |
| for (i = 0; i < s->nb_chapters; i++) |
| if (s->chapters[i]->end == AV_NOPTS_VALUE) { |
| AVChapter *ch = s->chapters[i]; |
| int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base) |
| : INT64_MAX; |
| |
| for (j = 0; j < s->nb_chapters; j++) { |
| AVChapter *ch1 = s->chapters[j]; |
| int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base); |
| if (j != i && next_start > ch->start && next_start < end) |
| end = next_start; |
| } |
| ch->end = (end == INT64_MAX) ? ch->start : end; |
| } |
| } |
| |
| static int get_std_framerate(int i){ |
| if(i<60*12) return i*1001; |
| else return ((const int[]){24,30,60,12,15})[i-60*12]*1000*12; |
| } |
| |
| /* |
| * Is the time base unreliable. |
| * This is a heuristic to balance between quick acceptance of the values in |
| * the headers vs. some extra checks. |
| * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps. |
| * MPEG-2 commonly misuses field repeat flags to store different framerates. |
| * And there are "variable" fps files this needs to detect as well. |
| */ |
| static int tb_unreliable(AVCodecContext *c){ |
| if( c->time_base.den >= 101L*c->time_base.num |
| || c->time_base.den < 5L*c->time_base.num |
| /* || c->codec_tag == AV_RL32("DIVX") |
| || c->codec_tag == AV_RL32("XVID")*/ |
| || c->codec_id == CODEC_ID_MPEG2VIDEO |
| || c->codec_id == CODEC_ID_H264 |
| ) |
| return 1; |
| return 0; |
| } |
| |
| #if FF_API_FORMAT_PARAMETERS |
| int av_find_stream_info(AVFormatContext *ic) |
| { |
| return avformat_find_stream_info(ic, NULL); |
| } |
| #endif |
| |
| int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options) |
| { |
| int i, count, ret, read_size, j; |
| AVStream *st; |
| AVPacket pkt1, *pkt; |
| int64_t old_offset = avio_tell(ic->pb); |
| int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those |
| |
| for(i=0;i<ic->nb_streams;i++) { |
| AVCodec *codec; |
| st = ic->streams[i]; |
| if (st->codec->codec_id == CODEC_ID_AAC) { |
| st->codec->sample_rate = 0; |
| st->codec->frame_size = 0; |
| st->codec->channels = 0; |
| } |
| if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO || |
| st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) { |
| /* if(!st->time_base.num) |
| st->time_base= */ |
| if(!st->codec->time_base.num) |
| st->codec->time_base= st->time_base; |
| } |
| //only for the split stuff |
| if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) { |
| st->parser = av_parser_init(st->codec->codec_id); |
| if(st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser){ |
| st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES; |
| } |
| } |
| assert(!st->codec->codec); |
| codec = avcodec_find_decoder(st->codec->codec_id); |
| |
| /* Force decoding of at least one frame of codec data |
| * this makes sure the codec initializes the channel configuration |
| * and does not trust the values from the container. |
| */ |
| if (codec && codec->capabilities & CODEC_CAP_CHANNEL_CONF) |
| st->codec->channels = 0; |
| |
| /* Ensure that subtitle_header is properly set. */ |
| if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE |
| && codec && !st->codec->codec) |
| avcodec_open2(st->codec, codec, options ? &options[i] : NULL); |
| |
| //try to just open decoders, in case this is enough to get parameters |
| if(!has_codec_parameters(st->codec)){ |
| if (codec && !st->codec->codec) |
| avcodec_open2(st->codec, codec, options ? &options[i] : NULL); |
| } |
| } |
| |
| for (i=0; i<ic->nb_streams; i++) { |
| ic->streams[i]->info->last_dts = AV_NOPTS_VALUE; |
| } |
| |
| count = 0; |
| read_size = 0; |
| for(;;) { |
| if(url_interrupt_cb()){ |
| ret= AVERROR_EXIT; |
| av_log(ic, AV_LOG_DEBUG, "interrupted\n"); |
| break; |
| } |
| |
| /* check if one codec still needs to be handled */ |
| for(i=0;i<ic->nb_streams;i++) { |
| int fps_analyze_framecount = 20; |
| |
| st = ic->streams[i]; |
| if (!has_codec_parameters(st->codec)) |
| break; |
| /* if the timebase is coarse (like the usual millisecond precision |
| of mkv), we need to analyze more frames to reliably arrive at |
| the correct fps */ |
| if (av_q2d(st->time_base) > 0.0005) |
| fps_analyze_framecount *= 2; |
| if (ic->fps_probe_size >= 0) |
| fps_analyze_framecount = ic->fps_probe_size; |
| /* variable fps and no guess at the real fps */ |
| if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num) |
| && st->info->duration_count < fps_analyze_framecount |
| && st->codec->codec_type == AVMEDIA_TYPE_VIDEO) |
| break; |
| if(st->parser && st->parser->parser->split && !st->codec->extradata) |
| break; |
| if(st->first_dts == AV_NOPTS_VALUE) |
| break; |
| } |
| if (i == ic->nb_streams) { |
| /* NOTE: if the format has no header, then we need to read |
| some packets to get most of the streams, so we cannot |
| stop here */ |
| if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) { |
| /* if we found the info for all the codecs, we can stop */ |
| ret = count; |
| av_log(ic, AV_LOG_DEBUG, "All info found\n"); |
| break; |
| } |
| } |
| /* we did not get all the codec info, but we read too much data */ |
| if (read_size >= ic->probesize) { |
| ret = count; |
| av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize); |
| break; |
| } |
| |
| /* NOTE: a new stream can be added there if no header in file |
| (AVFMTCTX_NOHEADER) */ |
| ret = av_read_frame_internal(ic, &pkt1); |
| if (ret < 0 && ret != AVERROR(EAGAIN)) { |
| /* EOF or error */ |
| ret = -1; /* we could not have all the codec parameters before EOF */ |
| for(i=0;i<ic->nb_streams;i++) { |
| st = ic->streams[i]; |
| if (!has_codec_parameters(st->codec)){ |
| char buf[256]; |
| avcodec_string(buf, sizeof(buf), st->codec, 0); |
| av_log(ic, AV_LOG_WARNING, "Could not find codec parameters (%s)\n", buf); |
| } else { |
| ret = 0; |
| } |
| } |
| break; |
| } |
| |
| if (ret == AVERROR(EAGAIN)) |
| continue; |
| |
| pkt= add_to_pktbuf(&ic->packet_buffer, &pkt1, &ic->packet_buffer_end); |
| if ((ret = av_dup_packet(pkt)) < 0) |
| goto find_stream_info_err; |
| |
| read_size += pkt->size; |
| |
| st = ic->streams[pkt->stream_index]; |
| if (st->codec_info_nb_frames>1) { |
| int64_t t; |
| if (st->time_base.den > 0 && (t=av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q)) >= ic->max_analyze_duration) { |
| av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t); |
| break; |
| } |
| st->info->codec_info_duration += pkt->duration; |
| } |
| { |
| int64_t last = st->info->last_dts; |
| |
| if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){ |
| int64_t duration= pkt->dts - last; |
| double dur= duration * av_q2d(st->time_base); |
| |
| // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO) |
| // av_log(NULL, AV_LOG_ERROR, "%f\n", dur); |
| if (st->info->duration_count < 2) |
| memset(st->info->duration_error, 0, sizeof(st->info->duration_error)); |
| for (i=1; i<FF_ARRAY_ELEMS(st->info->duration_error); i++) { |
| int framerate= get_std_framerate(i); |
| int ticks= lrintf(dur*framerate/(1001*12)); |
| double error = dur - (double)ticks*1001*12 / framerate; |
| st->info->duration_error[i] += error*error; |
| } |
| st->info->duration_count++; |
| // ignore the first 4 values, they might have some random jitter |
| if (st->info->duration_count > 3) |
| st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration); |
| } |
| if (last == AV_NOPTS_VALUE || st->info->duration_count <= 1) |
| st->info->last_dts = pkt->dts; |
| } |
| if(st->parser && st->parser->parser->split && !st->codec->extradata){ |
| int i= st->parser->parser->split(st->codec, pkt->data, pkt->size); |
| if(i){ |
| st->codec->extradata_size= i; |
| st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
| memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size); |
| memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE); |
| } |
| } |
| |
| /* if still no information, we try to open the codec and to |
| decompress the frame. We try to avoid that in most cases as |
| it takes longer and uses more memory. For MPEG-4, we need to |
| decompress for QuickTime. */ |
| if (!has_codec_parameters(st->codec) || !has_decode_delay_been_guessed(st)) |
| try_decode_frame(st, pkt, (options && i < orig_nb_streams )? &options[i] : NULL); |
| |
| st->codec_info_nb_frames++; |
| count++; |
| } |
| |
| // close codecs which were opened in try_decode_frame() |
| for(i=0;i<ic->nb_streams;i++) { |
| st = ic->streams[i]; |
| if(st->codec->codec) |
| avcodec_close(st->codec); |
| } |
| for(i=0;i<ic->nb_streams;i++) { |
| st = ic->streams[i]; |
| if (st->codec_info_nb_frames>2 && !st->avg_frame_rate.num && st->info->codec_info_duration) |
| av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den, |
| (st->codec_info_nb_frames-2)*(int64_t)st->time_base.den, |
| st->info->codec_info_duration*(int64_t)st->time_base.num, 60000); |
| if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
| if(st->codec->codec_id == CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){ |
| uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt); |
| if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt) |
| st->codec->codec_tag= tag; |
| } |
| |
| // the check for tb_unreliable() is not completely correct, since this is not about handling |
| // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g. |
| // ipmovie.c produces. |
| if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > FFMAX(1, st->time_base.den/(500LL*st->time_base.num)) && !st->r_frame_rate.num) |
| av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, st->time_base.den, st->time_base.num * st->info->duration_gcd, INT_MAX); |
| if (st->info->duration_count && !st->r_frame_rate.num |
| && tb_unreliable(st->codec) /*&& |
| //FIXME we should not special-case MPEG-2, but this needs testing with non-MPEG-2 ... |
| st->time_base.num*duration_sum[i]/st->info->duration_count*101LL > st->time_base.den*/){ |
| int num = 0; |
| double best_error= 2*av_q2d(st->time_base); |
| best_error = best_error*best_error*st->info->duration_count*1000*12*30; |
| |
| for (j=1; j<FF_ARRAY_ELEMS(st->info->duration_error); j++) { |
| double error = st->info->duration_error[j] * get_std_framerate(j); |
| // if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO) |
| // av_log(NULL, AV_LOG_ERROR, "%f %f\n", get_std_framerate(j) / 12.0/1001, error); |
| if(error < best_error){ |
| best_error= error; |
| num = get_std_framerate(j); |
| } |
| } |
| // do not increase frame rate by more than 1 % in order to match a standard rate. |
| if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate))) |
| av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX); |
| } |
| |
| if (!st->r_frame_rate.num){ |
| if( st->codec->time_base.den * (int64_t)st->time_base.num |
| <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){ |
| st->r_frame_rate.num = st->codec->time_base.den; |
| st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame; |
| }else{ |
| st->r_frame_rate.num = st->time_base.den; |
| st->r_frame_rate.den = st->time_base.num; |
| } |
| } |
| }else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
| if(!st->codec->bits_per_coded_sample) |
| st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id); |
| // set stream disposition based on audio service type |
| switch (st->codec->audio_service_type) { |
| case AV_AUDIO_SERVICE_TYPE_EFFECTS: |
| st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break; |
| case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED: |
| st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break; |
| case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED: |
| st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break; |
| case AV_AUDIO_SERVICE_TYPE_COMMENTARY: |
| st->disposition = AV_DISPOSITION_COMMENT; break; |
| case AV_AUDIO_SERVICE_TYPE_KARAOKE: |
| st->disposition = AV_DISPOSITION_KARAOKE; break; |
| } |
| } |
| } |
| |
| av_estimate_timings(ic, old_offset); |
| |
| compute_chapters_end(ic); |
| |
| #if 0 |
| /* correct DTS for B-frame streams with no timestamps */ |
| for(i=0;i<ic->nb_streams;i++) { |
| st = ic->streams[i]; |
| if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
| if(b-frames){ |
| ppktl = &ic->packet_buffer; |
| while(ppkt1){ |
| if(ppkt1->stream_index != i) |
| continue; |
| if(ppkt1->pkt->dts < 0) |
| break; |
| if(ppkt1->pkt->pts != AV_NOPTS_VALUE) |
| break; |
| ppkt1->pkt->dts -= delta; |
| ppkt1= ppkt1->next; |
| } |
| if(ppkt1) |
| continue; |
| st->cur_dts -= delta; |
| } |
| } |
| } |
| #endif |
| |
| find_stream_info_err: |
| for (i=0; i < ic->nb_streams; i++) |
| av_freep(&ic->streams[i]->info); |
| return ret; |
| } |
| |
| static AVProgram *find_program_from_stream(AVFormatContext *ic, int s) |
| { |
| int i, j; |
| |
| for (i = 0; i < ic->nb_programs; i++) |
| for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++) |
| if (ic->programs[i]->stream_index[j] == s) |
| return ic->programs[i]; |
| return NULL; |
| } |
| |
| int av_find_best_stream(AVFormatContext *ic, |
| enum AVMediaType type, |
| int wanted_stream_nb, |
| int related_stream, |
| AVCodec **decoder_ret, |
| int flags) |
| { |
| int i, nb_streams = ic->nb_streams; |
| int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1; |
| unsigned *program = NULL; |
| AVCodec *decoder = NULL, *best_decoder = NULL; |
| |
| if (related_stream >= 0 && wanted_stream_nb < 0) { |
| AVProgram *p = find_program_from_stream(ic, related_stream); |
| if (p) { |
| program = p->stream_index; |
| nb_streams = p->nb_stream_indexes; |
| } |
| } |
| for (i = 0; i < nb_streams; i++) { |
| int real_stream_index = program ? program[i] : i; |
| AVStream *st = ic->streams[real_stream_index]; |
| AVCodecContext *avctx = st->codec; |
| if (avctx->codec_type != type) |
| continue; |
| if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb) |
| continue; |
| if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED)) |
| continue; |
| if (decoder_ret) { |
| decoder = avcodec_find_decoder(st->codec->codec_id); |
| if (!decoder) { |
| if (ret < 0) |
| ret = AVERROR_DECODER_NOT_FOUND; |
| continue; |
| } |
| } |
| if (best_count >= st->codec_info_nb_frames) |
| continue; |
| best_count = st->codec_info_nb_frames; |
| ret = real_stream_index; |
| best_decoder = decoder; |
| if (program && i == nb_streams - 1 && ret < 0) { |
| program = NULL; |
| nb_streams = ic->nb_streams; |
| i = 0; /* no related stream found, try again with everything */ |
| } |
| } |
| if (decoder_ret) |
| *decoder_ret = best_decoder; |
| return ret; |
| } |
| |
| /*******************************************************/ |
| |
| int av_read_play(AVFormatContext *s) |
| { |
| if (s->iformat->read_play) |
| return s->iformat->read_play(s); |
| if (s->pb) |
| return avio_pause(s->pb, 0); |
| return AVERROR(ENOSYS); |
| } |
| |
| int av_read_pause(AVFormatContext *s) |
| { |
| if (s->iformat->read_pause) |
| return s->iformat->read_pause(s); |
| if (s->pb) |
| return avio_pause(s->pb, 1); |
| return AVERROR(ENOSYS); |
| } |
| |
| void av_close_input_stream(AVFormatContext *s) |
| { |
| flush_packet_queue(s); |
| if (s->iformat->read_close) |
| s->iformat->read_close(s); |
| avformat_free_context(s); |
| } |
| |
| void avformat_free_context(AVFormatContext *s) |
| { |
| int i; |
| AVStream *st; |
| |
| av_opt_free(s); |
| if (s->iformat && s->iformat->priv_class && s->priv_data) |
| av_opt_free(s->priv_data); |
| |
| for(i=0;i<s->nb_streams;i++) { |
| /* free all data in a stream component */ |
| st = s->streams[i]; |
| if (st->parser) { |
| av_parser_close(st->parser); |
| av_free_packet(&st->cur_pkt); |
| } |
| av_dict_free(&st->metadata); |
| av_freep(&st->probe_data.buf); |
| av_freep(&st->index_entries); |
| av_freep(&st->codec->extradata); |
| av_freep(&st->codec->subtitle_header); |
| av_freep(&st->codec); |
| av_freep(&st->priv_data); |
| av_freep(&st->info); |
| av_freep(&st); |
| } |
| for(i=s->nb_programs-1; i>=0; i--) { |
| av_dict_free(&s->programs[i]->metadata); |
| av_freep(&s->programs[i]->stream_index); |
| av_freep(&s->programs[i]); |
| } |
| av_freep(&s->programs); |
| av_freep(&s->priv_data); |
| while(s->nb_chapters--) { |
| av_dict_free(&s->chapters[s->nb_chapters]->metadata); |
| av_freep(&s->chapters[s->nb_chapters]); |
| } |
| av_freep(&s->chapters); |
| av_dict_free(&s->metadata); |
| av_freep(&s->streams); |
| av_free(s); |
| } |
| |
| void av_close_input_file(AVFormatContext *s) |
| { |
| AVIOContext *pb = (s->iformat->flags & AVFMT_NOFILE) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ? |
| NULL : s->pb; |
| av_close_input_stream(s); |
| if (pb) |
| avio_close(pb); |
| } |
| |
| AVStream *av_new_stream(AVFormatContext *s, int id) |
| { |
| AVStream *st; |
| int i; |
| AVStream **streams; |
| |
| if (s->nb_streams >= INT_MAX/sizeof(*streams)) |
| return NULL; |
| streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams)); |
| if (!streams) |
| return NULL; |
| s->streams = streams; |
| |
| st = av_mallocz(sizeof(AVStream)); |
| if (!st) |
| return NULL; |
| if (!(st->info = av_mallocz(sizeof(*st->info)))) { |
| av_free(st); |
| return NULL; |
| } |
| |
| st->codec= avcodec_alloc_context(); |
| if (s->iformat) { |
| /* no default bitrate if decoding */ |
| st->codec->bit_rate = 0; |
| } |
| st->index = s->nb_streams; |
| st->id = id; |
| st->start_time = AV_NOPTS_VALUE; |
| st->duration = AV_NOPTS_VALUE; |
| /* we set the current DTS to 0 so that formats without any timestamps |
| but durations get some timestamps, formats with some unknown |
| timestamps have their first few packets buffered and the |
| timestamps corrected before they are returned to the user */ |
| st->cur_dts = 0; |
| st->first_dts = AV_NOPTS_VALUE; |
| st->probe_packets = MAX_PROBE_PACKETS; |
| |
| /* default pts setting is MPEG-like */ |
| av_set_pts_info(st, 33, 1, 90000); |
| st->last_IP_pts = AV_NOPTS_VALUE; |
| for(i=0; i<MAX_REORDER_DELAY+1; i++) |
| st->pts_buffer[i]= AV_NOPTS_VALUE; |
| st->reference_dts = AV_NOPTS_VALUE; |
| |
| st->sample_aspect_ratio = (AVRational){0,1}; |
| |
| s->streams[s->nb_streams++] = st; |
| return st; |
| } |
| |
| AVProgram *av_new_program(AVFormatContext *ac, int id) |
| { |
| AVProgram *program=NULL; |
| int i; |
| |
| av_dlog(ac, "new_program: id=0x%04x\n", id); |
| |
| for(i=0; i<ac->nb_programs; i++) |
| if(ac->programs[i]->id == id) |
| program = ac->programs[i]; |
| |
| if(!program){ |
| program = av_mallocz(sizeof(AVProgram)); |
| if (!program) |
| return NULL; |
| dynarray_add(&ac->programs, &ac->nb_programs, program); |
| program->discard = AVDISCARD_NONE; |
| } |
| program->id = id; |
| |
| return program; |
| } |
| |
| AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title) |
| { |
| AVChapter *chapter = NULL; |
| int i; |
| |
| for(i=0; i<s->nb_chapters; i++) |
| if(s->chapters[i]->id == id) |
| chapter = s->chapters[i]; |
| |
| if(!chapter){ |
| chapter= av_mallocz(sizeof(AVChapter)); |
| if(!chapter) |
| return NULL; |
| dynarray_add(&s->chapters, &s->nb_chapters, chapter); |
| } |
| av_dict_set(&chapter->metadata, "title", title, 0); |
| chapter->id = id; |
| chapter->time_base= time_base; |
| chapter->start = start; |
| chapter->end = end; |
| |
| return chapter; |
| } |
| |
| /************************************************************/ |
| /* output media file */ |
| |
| #if FF_API_FORMAT_PARAMETERS |
| int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap) |
| { |
| if (s->oformat->priv_data_size > 0) { |
| s->priv_data = av_mallocz(s->oformat->priv_data_size); |
| if (!s->priv_data) |
| return AVERROR(ENOMEM); |
| if (s->oformat->priv_class) { |
| *(const AVClass**)s->priv_data= s->oformat->priv_class; |
| av_opt_set_defaults(s->priv_data); |
| } |
| } else |
| s->priv_data = NULL; |
| |
| return 0; |
| } |
| #endif |
| |
| int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat, |
| const char *format, const char *filename) |
| { |
| AVFormatContext *s = avformat_alloc_context(); |
| int ret = 0; |
| |
| *avctx = NULL; |
| if (!s) |
| goto nomem; |
| |
| if (!oformat) { |
| if (format) { |
| oformat = av_guess_format(format, NULL, NULL); |
| if (!oformat) { |
| av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format); |
| ret = AVERROR(EINVAL); |
| goto error; |
| } |
| } else { |
| oformat = av_guess_format(NULL, filename, NULL); |
| if (!oformat) { |
| ret = AVERROR(EINVAL); |
| av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n", |
| filename); |
| goto error; |
| } |
| } |
| } |
| |
| s->oformat = oformat; |
| if (s->oformat->priv_data_size > 0) { |
| s->priv_data = av_mallocz(s->oformat->priv_data_size); |
| if (!s->priv_data) |
| goto nomem; |
| if (s->oformat->priv_class) { |
| *(const AVClass**)s->priv_data= s->oformat->priv_class; |
| av_opt_set_defaults(s->priv_data); |
| } |
| } else |
| s->priv_data = NULL; |
| |
| if (filename) |
| av_strlcpy(s->filename, filename, sizeof(s->filename)); |
| *avctx = s; |
| return 0; |
| nomem: |
| av_log(s, AV_LOG_ERROR, "Out of memory\n"); |
| ret = AVERROR(ENOMEM); |
| error: |
| avformat_free_context(s); |
| return ret; |
| } |
| |
| #if FF_API_ALLOC_OUTPUT_CONTEXT |
| AVFormatContext *avformat_alloc_output_context(const char *format, |
| AVOutputFormat *oformat, const char *filename) |
| { |
| AVFormatContext *avctx; |
| int ret = avformat_alloc_output_context2(&avctx, oformat, format, filename); |
| return ret < 0 ? NULL : avctx; |
| } |
| #endif |
| |
| static int validate_codec_tag(AVFormatContext *s, AVStream *st) |
| { |
| const AVCodecTag *avctag; |
| int n; |
| enum CodecID id = CODEC_ID_NONE; |
| unsigned int tag = 0; |
| |
| /** |
| * Check that tag + id is in the table |
| * If neither is in the table -> OK |
| * If tag is in the table with another id -> FAIL |
| * If id is in the table with another tag -> FAIL unless strict < normal |
| */ |
| for (n = 0; s->oformat->codec_tag[n]; n++) { |
| avctag = s->oformat->codec_tag[n]; |
| while (avctag->id != CODEC_ID_NONE) { |
| if (ff_toupper4(avctag->tag) == ff_toupper4(st->codec->codec_tag)) { |
| id = avctag->id; |
| if (id == st->codec->codec_id) |
| return 1; |
| } |
| if (avctag->id == st->codec->codec_id) |
| tag = avctag->tag; |
| avctag++; |
| } |
| } |
| if (id != CODEC_ID_NONE) |
| return 0; |
| if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL)) |
| return 0; |
| return 1; |
| } |
| |
| #if FF_API_FORMAT_PARAMETERS |
| int av_write_header(AVFormatContext *s) |
| { |
| return avformat_write_header(s, NULL); |
| } |
| #endif |
| |
| int avformat_write_header(AVFormatContext *s, AVDictionary **options) |
| { |
| int ret = 0, i; |
| AVStream *st; |
| AVDictionary *tmp = NULL; |
| |
| if (options) |
| av_dict_copy(&tmp, *options, 0); |
| if ((ret = av_opt_set_dict(s, &tmp)) < 0) |
| goto fail; |
| |
| // some sanity checks |
| if (s->nb_streams == 0 && !(s->oformat->flags & AVFMT_NOSTREAMS)) { |
| av_log(s, AV_LOG_ERROR, "no streams\n"); |
| ret = AVERROR(EINVAL); |
| goto fail; |
| } |
| |
| for(i=0;i<s->nb_streams;i++) { |
| st = s->streams[i]; |
| |
| switch (st->codec->codec_type) { |
| case AVMEDIA_TYPE_AUDIO: |
| if(st->codec->sample_rate<=0){ |
| av_log(s, AV_LOG_ERROR, "sample rate not set\n"); |
| ret = AVERROR(EINVAL); |
| goto fail; |
| } |
| if(!st->codec->block_align) |
| st->codec->block_align = st->codec->channels * |
| av_get_bits_per_sample(st->codec->codec_id) >> 3; |
| break; |
| case AVMEDIA_TYPE_VIDEO: |
| if(st->codec->time_base.num<=0 || st->codec->time_base.den<=0){ //FIXME audio too? |
| av_log(s, AV_LOG_ERROR, "time base not set\n"); |
| ret = AVERROR(EINVAL); |
| goto fail; |
| } |
| if((st->codec->width<=0 || st->codec->height<=0) && !(s->oformat->flags & AVFMT_NODIMENSIONS)){ |
| av_log(s, AV_LOG_ERROR, "dimensions not set\n"); |
| ret = AVERROR(EINVAL); |
| goto fail; |
| } |
| if(av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio) |
| && FFABS(av_q2d(st->sample_aspect_ratio) - av_q2d(st->codec->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio) |
| ){ |
| av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between encoder and muxer layer\n"); |
| ret = AVERROR(EINVAL); |
| goto fail; |
| } |
| break; |
| } |
| |
| if(s->oformat->codec_tag){ |
| if(st->codec->codec_tag && st->codec->codec_id == CODEC_ID_RAWVIDEO && av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id) == 0 && !validate_codec_tag(s, st)){ |
| //the current rawvideo encoding system ends up setting the wrong codec_tag for avi, we override it here |
| st->codec->codec_tag= 0; |
| } |
| if(st->codec->codec_tag){ |
| if (!validate_codec_tag(s, st)) { |
| char tagbuf[32]; |
| av_get_codec_tag_string(tagbuf, sizeof(tagbuf), st->codec->codec_tag); |
| av_log(s, AV_LOG_ERROR, |
| "Tag %s/0x%08x incompatible with output codec id '%d'\n", |
| tagbuf, st->codec->codec_tag, st->codec->codec_id); |
| ret = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| }else |
| st->codec->codec_tag= av_codec_get_tag(s->oformat->codec_tag, st->codec->codec_id); |
| } |
| |
| if(s->oformat->flags & AVFMT_GLOBALHEADER && |
| !(st->codec->flags & CODEC_FLAG_GLOBAL_HEADER)) |
| av_log(s, AV_LOG_WARNING, "Codec for stream %d does not use global headers but container format requires global headers\n", i); |
| } |
| |
| if (!s->priv_data && s->oformat->priv_data_size > 0) { |
| s->priv_data = av_mallocz(s->oformat->priv_data_size); |
| if (!s->priv_data) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| if (s->oformat->priv_class) { |
| *(const AVClass**)s->priv_data= s->oformat->priv_class; |
| av_opt_set_defaults(s->priv_data); |
| if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0) |
| goto fail; |
| } |
| } |
| |
| /* set muxer identification string */ |
| if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) { |
| av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0); |
| } |
| |
| if(s->oformat->write_header){ |
| ret = s->oformat->write_header(s); |
| if (ret < 0) |
| goto fail; |
| } |
| |
| /* init PTS generation */ |
| for(i=0;i<s->nb_streams;i++) { |
| int64_t den = AV_NOPTS_VALUE; |
| st = s->streams[i]; |
| |
| switch (st->codec->codec_type) { |
| case AVMEDIA_TYPE_AUDIO: |
| den = (int64_t)st->time_base.num * st->codec->sample_rate; |
| break; |
| case AVMEDIA_TYPE_VIDEO: |
| den = (int64_t)st->time_base.num * st->codec->time_base.den; |
| break; |
| default: |
| break; |
| } |
| if (den != AV_NOPTS_VALUE) { |
| if (den <= 0) { |
| ret = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| av_frac_init(&st->pts, 0, 0, den); |
| } |
| } |
| |
| if (options) { |
| av_dict_free(options); |
| *options = tmp; |
| } |
| return 0; |
| fail: |
| av_dict_free(&tmp); |
| return ret; |
| } |
| |
| //FIXME merge with compute_pkt_fields |
| static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt){ |
| int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames); |
| int num, den, frame_size, i; |
| |
| av_dlog(s, "compute_pkt_fields2: pts:%"PRId64" dts:%"PRId64" cur_dts:%"PRId64" b:%d size:%d st:%d\n", |
| pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index); |
| |
| /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE) |
| return AVERROR(EINVAL);*/ |
| |
| /* duration field */ |
| if (pkt->duration == 0) { |
| compute_frame_duration(&num, &den, st, NULL, pkt); |
| if (den && num) { |
| pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num); |
| } |
| } |
| |
| if(pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay==0) |
| pkt->pts= pkt->dts; |
| |
| //XXX/FIXME this is a temporary hack until all encoders output pts |
| if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay){ |
| pkt->dts= |
| // pkt->pts= st->cur_dts; |
| pkt->pts= st->pts.val; |
| } |
| |
| //calculate dts from pts |
| if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY){ |
| st->pts_buffer[0]= pkt->pts; |
| for(i=1; i<delay+1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++) |
| st->pts_buffer[i]= pkt->pts + (i-delay-1) * pkt->duration; |
| for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++) |
| FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]); |
| |
| pkt->dts= st->pts_buffer[0]; |
| } |
| |
| if(st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)){ |
| av_log(s, AV_LOG_ERROR, |
| "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %"PRId64" >= %"PRId64"\n", |
| st->index, st->cur_dts, pkt->dts); |
| return AVERROR(EINVAL); |
| } |
| if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts){ |
| av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index); |
| return AVERROR(EINVAL); |
| } |
| |
| // av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n", pkt->pts, pkt->dts); |
| st->cur_dts= pkt->dts; |
| st->pts.val= pkt->dts; |
| |
| /* update pts */ |
| switch (st->codec->codec_type) { |
| case AVMEDIA_TYPE_AUDIO: |
| frame_size = get_audio_frame_size(st->codec, pkt->size); |
| |
| /* HACK/FIXME, we skip the initial 0 size packets as they are most |
| likely equal to the encoder delay, but it would be better if we |
| had the real timestamps from the encoder */ |
| if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) { |
| av_frac_add(&st->pts, (int64_t)st->time_base.den * frame_size); |
| } |
| break; |
| case AVMEDIA_TYPE_VIDEO: |
| av_frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num); |
| break; |
| default: |
| break; |
| } |
| return 0; |
| } |
| |
| int av_write_frame(AVFormatContext *s, AVPacket *pkt) |
| { |
| int ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt); |
| |
| if(ret<0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) |
| return ret; |
| |
| ret= s->oformat->write_packet(s, pkt); |
| if(!ret) |
| ret= url_ferror(s->pb); |
| return ret; |
| } |
| |
| void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt, |
| int (*compare)(AVFormatContext *, AVPacket *, AVPacket *)) |
| { |
| AVPacketList **next_point, *this_pktl; |
| |
| this_pktl = av_mallocz(sizeof(AVPacketList)); |
| this_pktl->pkt= *pkt; |
| pkt->destruct= NULL; // do not free original but only the copy |
| av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory |
| |
| if(s->streams[pkt->stream_index]->last_in_packet_buffer){ |
| next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next); |
| }else |
| next_point = &s->packet_buffer; |
| |
| if(*next_point){ |
| if(compare(s, &s->packet_buffer_end->pkt, pkt)){ |
| while(!compare(s, &(*next_point)->pkt, pkt)){ |
| next_point= &(*next_point)->next; |
| } |
| goto next_non_null; |
| }else{ |
| next_point = &(s->packet_buffer_end->next); |
| } |
| } |
| assert(!*next_point); |
| |
| s->packet_buffer_end= this_pktl; |
| next_non_null: |
| |
| this_pktl->next= *next_point; |
| |
| s->streams[pkt->stream_index]->last_in_packet_buffer= |
| *next_point= this_pktl; |
| } |
| |
| static int ff_interleave_compare_dts(AVFormatContext *s, AVPacket *next, AVPacket *pkt) |
| { |
| AVStream *st = s->streams[ pkt ->stream_index]; |
| AVStream *st2= s->streams[ next->stream_index]; |
| int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts, |
| st->time_base); |
| |
| if (comp == 0) |
| return pkt->stream_index < next->stream_index; |
| return comp > 0; |
| } |
| |
| int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush){ |
| AVPacketList *pktl; |
| int stream_count=0; |
| int i; |
| |
| if(pkt){ |
| ff_interleave_add_packet(s, pkt, ff_interleave_compare_dts); |
| } |
| |
| for(i=0; i < s->nb_streams; i++) |
| stream_count+= !!s->streams[i]->last_in_packet_buffer; |
| |
| if(stream_count && (s->nb_streams == stream_count || flush)){ |
| pktl= s->packet_buffer; |
| *out= pktl->pkt; |
| |
| s->packet_buffer= pktl->next; |
| if(!s->packet_buffer) |
| s->packet_buffer_end= NULL; |
| |
| if(s->streams[out->stream_index]->last_in_packet_buffer == pktl) |
| s->streams[out->stream_index]->last_in_packet_buffer= NULL; |
| av_freep(&pktl); |
| return 1; |
| }else{ |
| av_init_packet(out); |
| return 0; |
| } |
| } |
| |
| /** |
| * Interleave an AVPacket correctly so it can be muxed. |
| * @param out the interleaved packet will be output here |
| * @param in the input packet |
| * @param flush 1 if no further packets are available as input and all |
| * remaining packets should be output |
| * @return 1 if a packet was output, 0 if no packet could be output, |
| * < 0 if an error occurred |
| */ |
| static int av_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush){ |
| if(s->oformat->interleave_packet) |
| return s->oformat->interleave_packet(s, out, in, flush); |
| else |
| return av_interleave_packet_per_dts(s, out, in, flush); |
| } |
| |
| int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt){ |
| AVStream *st= s->streams[ pkt->stream_index]; |
| int ret; |
| |
| //FIXME/XXX/HACK drop zero sized packets |
| if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size==0) |
| return 0; |
| |
| av_dlog(s, "av_interleaved_write_frame size:%d dts:%"PRId64" pts:%"PRId64"\n", |
| pkt->size, pkt->dts, pkt->pts); |
| if((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) |
| return ret; |
| |
| if(pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) |
| return AVERROR(EINVAL); |
| |
| for(;;){ |
| AVPacket opkt; |
| int ret= av_interleave_packet(s, &opkt, pkt, 0); |
| if(ret<=0) //FIXME cleanup needed for ret<0 ? |
| return ret; |
| |
| ret= s->oformat->write_packet(s, &opkt); |
| |
| av_free_packet(&opkt); |
| pkt= NULL; |
| |
| if(ret<0) |
| return ret; |
| if(url_ferror(s->pb)) |
| return url_ferror(s->pb); |
| } |
| } |
| |
| int av_write_trailer(AVFormatContext *s) |
| { |
| int ret, i; |
| |
| for(;;){ |
| AVPacket pkt; |
| ret= av_interleave_packet(s, &pkt, NULL, 1); |
| if(ret<0) //FIXME cleanup needed for ret<0 ? |
| goto fail; |
| if(!ret) |
| break; |
| |
| ret= s->oformat->write_packet(s, &pkt); |
| |
| av_free_packet(&pkt); |
| |
| if(ret<0) |
| goto fail; |
| if(url_ferror(s->pb)) |
| goto fail; |
| } |
| |
| if(s->oformat->write_trailer) |
| ret = s->oformat->write_trailer(s); |
| fail: |
| if(ret == 0) |
| ret=url_ferror(s->pb); |
| for(i=0;i<s->nb_streams;i++) { |
| av_freep(&s->streams[i]->priv_data); |
| av_freep(&s->streams[i]->index_entries); |
| } |
| if (s->iformat && s->iformat->priv_class) |
| av_opt_free(s->priv_data); |
| av_freep(&s->priv_data); |
| return ret; |
| } |
| |
| void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx) |
| { |
| int i, j; |
| AVProgram *program=NULL; |
| void *tmp; |
| |
| if (idx >= ac->nb_streams) { |
| av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx); |
| return; |
| } |
| |
| for(i=0; i<ac->nb_programs; i++){ |
| if(ac->programs[i]->id != progid) |
| continue; |
| program = ac->programs[i]; |
| for(j=0; j<program->nb_stream_indexes; j++) |
| if(program->stream_index[j] == idx) |
| return; |
| |
| tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1)); |
| if(!tmp) |
| return; |
| program->stream_index = tmp; |
| program->stream_index[program->nb_stream_indexes++] = idx; |
| return; |
| } |
| } |
| |
| static void print_fps(double d, const char *postfix){ |
| uint64_t v= lrintf(d*100); |
| if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix); |
| else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix); |
| else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix); |
| } |
| |
| static void dump_metadata(void *ctx, AVDictionary *m, const char *indent) |
| { |
| if(m && !(m->count == 1 && av_dict_get(m, "language", NULL, 0))){ |
| AVDictionaryEntry *tag=NULL; |
| |
| av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent); |
| while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) { |
| if(strcmp("language", tag->key)){ |
| char tmp[256]; |
| int i; |
| av_strlcpy(tmp, tag->value, sizeof(tmp)); |
| for(i=0; i<strlen(tmp); i++) if(tmp[i]==0xd) tmp[i]=' '; |
| av_log(ctx, AV_LOG_INFO, "%s %-16s: %s\n", indent, tag->key, tmp); |
| } |
| } |
| } |
| } |
| |
| /* "user interface" functions */ |
| static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output) |
| { |
| char buf[256]; |
| int flags = (is_output ? ic->oformat->flags : ic->iformat->flags); |
| AVStream *st = ic->streams[i]; |
| int g = av_gcd(st->time_base.num, st->time_base.den); |
| AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0); |
| avcodec_string(buf, sizeof(buf), st->codec, is_output); |
| av_log(NULL, AV_LOG_INFO, " Stream #%d.%d", index, i); |
| /* the pid is an important information, so we display it */ |
| /* XXX: add a generic system */ |
| if (flags & AVFMT_SHOW_IDS) |
| av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id); |
| if (lang) |
| av_log(NULL, AV_LOG_INFO, "(%s)", lang->value); |
| av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g); |
| av_log(NULL, AV_LOG_INFO, ": %s", buf); |
| if (st->sample_aspect_ratio.num && // default |
| av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) { |
| AVRational display_aspect_ratio; |
| av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den, |
| st->codec->width*st->sample_aspect_ratio.num, |
| st->codec->height*st->sample_aspect_ratio.den, |
| 1024*1024); |
| av_log(NULL, AV_LOG_INFO, ", PAR %d:%d DAR %d:%d", |
| st->sample_aspect_ratio.num, st->sample_aspect_ratio.den, |
| display_aspect_ratio.num, display_aspect_ratio.den); |
| } |
| if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){ |
| if(st->avg_frame_rate.den && st->avg_frame_rate.num) |
| print_fps(av_q2d(st->avg_frame_rate), "fps"); |
| if(st->r_frame_rate.den && st->r_frame_rate.num) |
| print_fps(av_q2d(st->r_frame_rate), "tbr"); |
| if(st->time_base.den && st->time_base.num) |
| print_fps(1/av_q2d(st->time_base), "tbn"); |
| if(st->codec->time_base.den && st->codec->time_base.num) |
| print_fps(1/av_q2d(st->codec->time_base), "tbc"); |
| } |
| if (st->disposition & AV_DISPOSITION_DEFAULT) |
| av_log(NULL, AV_LOG_INFO, " (default)"); |
| if (st->disposition & AV_DISPOSITION_DUB) |
| av_log(NULL, AV_LOG_INFO, " (dub)"); |
| if (st->disposition & AV_DISPOSITION_ORIGINAL) |
| av_log(NULL, AV_LOG_INFO, " (original)"); |
| if (st->disposition & AV_DISPOSITION_COMMENT) |
| av_log(NULL, AV_LOG_INFO, " (comment)"); |
| if (st->disposition & AV_DISPOSITION_LYRICS) |
| av_log(NULL, AV_LOG_INFO, " (lyrics)"); |
| if (st->disposition & AV_DISPOSITION_KARAOKE) |
| av_log(NULL, AV_LOG_INFO, " (karaoke)"); |
| if (st->disposition & AV_DISPOSITION_FORCED) |
| av_log(NULL, AV_LOG_INFO, " (forced)"); |
| if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) |
| av_log(NULL, AV_LOG_INFO, " (hearing impaired)"); |
| if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED) |
| av_log(NULL, AV_LOG_INFO, " (visual impaired)"); |
| if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS) |
| av_log(NULL, AV_LOG_INFO, " (clean effects)"); |
| av_log(NULL, AV_LOG_INFO, "\n"); |
| dump_metadata(NULL, st->metadata, " "); |
| } |
| |
| #if FF_API_DUMP_FORMAT |
| void dump_format(AVFormatContext *ic, |
| int index, |
| const char *url, |
| int is_output) |
| { |
| av_dump_format(ic, index, url, is_output); |
| } |
| #endif |
| |
| void av_dump_format(AVFormatContext *ic, |
| int index, |
| const char *url, |
| int is_output) |
| { |
| int i; |
| uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL; |
| if (ic->nb_streams && !printed) |
| return; |
| |
| av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n", |
| is_output ? "Output" : "Input", |
| index, |
| is_output ? ic->oformat->name : ic->iformat->name, |
| is_output ? "to" : "from", url); |
| dump_metadata(NULL, ic->metadata, " "); |
| if (!is_output) { |
| av_log(NULL, AV_LOG_INFO, " Duration: "); |
| if (ic->duration != AV_NOPTS_VALUE) { |
| int hours, mins, secs, us; |
| secs = ic->duration / AV_TIME_BASE; |
| us = ic->duration % AV_TIME_BASE; |
| mins = secs / 60; |
| secs %= 60; |
| hours = mins / 60; |
| mins %= 60; |
| av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs, |
| (100 * us) / AV_TIME_BASE); |
| } else { |
| av_log(NULL, AV_LOG_INFO, "N/A"); |
| } |
| if (ic->start_time != AV_NOPTS_VALUE) { |
| int secs, us; |
| av_log(NULL, AV_LOG_INFO, ", start: "); |
| secs = ic->start_time / AV_TIME_BASE; |
| us = abs(ic->start_time % AV_TIME_BASE); |
| av_log(NULL, AV_LOG_INFO, "%d.%06d", |
| secs, (int)av_rescale(us, 1000000, AV_TIME_BASE)); |
| } |
| av_log(NULL, AV_LOG_INFO, ", bitrate: "); |
| if (ic->bit_rate) { |
| av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000); |
| } else { |
| av_log(NULL, AV_LOG_INFO, "N/A"); |
| } |
| av_log(NULL, AV_LOG_INFO, "\n"); |
| } |
| for (i = 0; i < ic->nb_chapters; i++) { |
| AVChapter *ch = ic->chapters[i]; |
| av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i); |
| av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base)); |
| av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base)); |
| |
| dump_metadata(NULL, ch->metadata, " "); |
| } |
| if(ic->nb_programs) { |
| int j, k, total = 0; |
| for(j=0; j<ic->nb_programs; j++) { |
| AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata, |
| "name", NULL, 0); |
| av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id, |
| name ? name->value : ""); |
| dump_metadata(NULL, ic->programs[j]->metadata, " "); |
| for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) { |
| dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output); |
| printed[ic->programs[j]->stream_index[k]] = 1; |
| } |
| total += ic->programs[j]->nb_stream_indexes; |
| } |
| if (total < ic->nb_streams) |
| av_log(NULL, AV_LOG_INFO, " No Program\n"); |
| } |
| for(i=0;i<ic->nb_streams;i++) |
| if (!printed[i]) |
| dump_stream_format(ic, i, index, is_output); |
| |
| av_free(printed); |
| } |
| |
| int64_t av_gettime(void) |
| { |
| struct timeval tv; |
| gettimeofday(&tv,NULL); |
| return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec; |
| } |
| |
| uint64_t ff_ntp_time(void) |
| { |
| return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US; |
| } |
| |
| #if FF_API_PARSE_DATE |
| #include "libavutil/parseutils.h" |
| |
| int64_t parse_date(const char *timestr, int duration) |
| { |
| int64_t timeval; |
| av_parse_time(&timeval, timestr, duration); |
| return timeval; |
| } |
| #endif |
| |
| #if FF_API_FIND_INFO_TAG |
| #include "libavutil/parseutils.h" |
| |
| int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info) |
| { |
| return av_find_info_tag(arg, arg_size, tag1, info); |
| } |
| #endif |
| |
| int av_get_frame_filename(char *buf, int buf_size, |
| const char *path, int number) |
| { |
| const char *p; |
| char *q, buf1[20], c; |
| int nd, len, percentd_found; |
| |
| q = buf; |
| p = path; |
| percentd_found = 0; |
| for(;;) { |
| c = *p++; |
| if (c == '\0') |
| break; |
| if (c == '%') { |
| do { |
| nd = 0; |
| while (isdigit(*p)) { |
| nd = nd * 10 + *p++ - '0'; |
| } |
| c = *p++; |
| } while (isdigit(c)); |
| |
| switch(c) { |
| case '%': |
| goto addchar; |
| case 'd': |
| if (percentd_found) |
| goto fail; |
| percentd_found = 1; |
| snprintf(buf1, sizeof(buf1), "%0*d", nd, number); |
| len = strlen(buf1); |
| if ((q - buf + len) > buf_size - 1) |
| goto fail; |
| memcpy(q, buf1, len); |
| q += len; |
| break; |
| default: |
| goto fail; |
| } |
| } else { |
| addchar: |
| if ((q - buf) < buf_size - 1) |
| *q++ = c; |
| } |
| } |
| if (!percentd_found) |
| goto fail; |
| *q = '\0'; |
| return 0; |
| fail: |
| *q = '\0'; |
| return -1; |
| } |
| |
| static void hex_dump_internal(void *avcl, FILE *f, int level, uint8_t *buf, int size) |
| { |
| int len, i, j, c; |
| #undef fprintf |
| #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0) |
| |
| for(i=0;i<size;i+=16) { |
| len = size - i; |
| if (len > 16) |
| len = 16; |
| PRINT("%08x ", i); |
| for(j=0;j<16;j++) { |
| if (j < len) |
| PRINT(" %02x", buf[i+j]); |
| else |
| PRINT(" "); |
| } |
| PRINT(" "); |
| for(j=0;j<len;j++) { |
| c = buf[i+j]; |
| if (c < ' ' || c > '~') |
| c = '.'; |
| PRINT("%c", c); |
| } |
| PRINT("\n"); |
| } |
| #undef PRINT |
| } |
| |
| void av_hex_dump(FILE *f, uint8_t *buf, int size) |
| { |
| hex_dump_internal(NULL, f, 0, buf, size); |
| } |
| |
| void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size) |
| { |
| hex_dump_internal(avcl, NULL, level, buf, size); |
| } |
| |
| static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base) |
| { |
| #undef fprintf |
| #define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0) |
| PRINT("stream #%d:\n", pkt->stream_index); |
| PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0)); |
| PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base)); |
| /* DTS is _always_ valid after av_read_frame() */ |
| PRINT(" dts="); |
| if (pkt->dts == AV_NOPTS_VALUE) |
| PRINT("N/A"); |
| else |
| PRINT("%0.3f", pkt->dts * av_q2d(time_base)); |
| /* PTS may not be known if B-frames are present. */ |
| PRINT(" pts="); |
| if (pkt->pts == AV_NOPTS_VALUE) |
| PRINT("N/A"); |
| else |
| PRINT("%0.3f", pkt->pts * av_q2d(time_base)); |
| PRINT("\n"); |
| PRINT(" size=%d\n", pkt->size); |
| #undef PRINT |
| if (dump_payload) |
| av_hex_dump(f, pkt->data, pkt->size); |
| } |
| |
| #if FF_API_PKT_DUMP |
| void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload) |
| { |
| AVRational tb = { 1, AV_TIME_BASE }; |
| pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb); |
| } |
| #endif |
| |
| void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st) |
| { |
| pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base); |
| } |
| |
| #if FF_API_PKT_DUMP |
| void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload) |
| { |
| AVRational tb = { 1, AV_TIME_BASE }; |
| pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb); |
| } |
| #endif |
| |
| void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload, |
| AVStream *st) |
| { |
| pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base); |
| } |
| |
| void av_url_split(char *proto, int proto_size, |
| char *authorization, int authorization_size, |
| char *hostname, int hostname_size, |
| int *port_ptr, |
| char *path, int path_size, |
| const char *url) |
| { |
| const char *p, *ls, *at, *col, *brk; |
| |
| if (port_ptr) *port_ptr = -1; |
| if (proto_size > 0) proto[0] = 0; |
| if (authorization_size > 0) authorization[0] = 0; |
| if (hostname_size > 0) hostname[0] = 0; |
| if (path_size > 0) path[0] = 0; |
| |
| /* parse protocol */ |
| if ((p = strchr(url, ':'))) { |
| av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url)); |
| p++; /* skip ':' */ |
| if (*p == '/') p++; |
| if (*p == '/') p++; |
| } else { |
| /* no protocol means plain filename */ |
| av_strlcpy(path, url, path_size); |
| return; |
| } |
| |
| /* separate path from hostname */ |
| ls = strchr(p, '/'); |
| if(!ls) |
| ls = strchr(p, '?'); |
| if(ls) |
| av_strlcpy(path, ls, path_size); |
| else |
| ls = &p[strlen(p)]; // XXX |
| |
| /* the rest is hostname, use that to parse auth/port */ |
| if (ls != p) { |
| /* authorization (user[:pass]@hostname) */ |
| if ((at = strchr(p, '@')) && at < ls) { |
| av_strlcpy(authorization, p, |
| FFMIN(authorization_size, at + 1 - p)); |
| p = at + 1; /* skip '@' */ |
| } |
| |
| if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) { |
| /* [host]:port */ |
| av_strlcpy(hostname, p + 1, |
| FFMIN(hostname_size, brk - p)); |
| if (brk[1] == ':' && port_ptr) |
| *port_ptr = atoi(brk + 2); |
| } else if ((col = strchr(p, ':')) && col < ls) { |
| av_strlcpy(hostname, p, |
| FFMIN(col + 1 - p, hostname_size)); |
| if (port_ptr) *port_ptr = atoi(col + 1); |
| } else |
| av_strlcpy(hostname, p, |
| FFMIN(ls + 1 - p, hostname_size)); |
| } |
| } |
| |
| char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase) |
| { |
| int i; |
| static const char hex_table_uc[16] = { '0', '1', '2', '3', |
| '4', '5', '6', '7', |
| '8', '9', 'A', 'B', |
| 'C', 'D', 'E', 'F' }; |
| static const char hex_table_lc[16] = { '0', '1', '2', '3', |
| '4', '5', '6', '7', |
| '8', '9', 'a', 'b', |
| 'c', 'd', 'e', 'f' }; |
| const char *hex_table = lowercase ? hex_table_lc : hex_table_uc; |
| |
| for(i = 0; i < s; i++) { |
| buff[i * 2] = hex_table[src[i] >> 4]; |
| buff[i * 2 + 1] = hex_table[src[i] & 0xF]; |
| } |
| |
| return buff; |
| } |
| |
| int ff_hex_to_data(uint8_t *data, const char *p) |
| { |
| int c, len, v; |
| |
| len = 0; |
| v = 1; |
| for (;;) { |
| p += strspn(p, SPACE_CHARS); |
| if (*p == '\0') |
| break; |
| c = toupper((unsigned char) *p++); |
| if (c >= '0' && c <= '9') |
| c = c - '0'; |
| else if (c >= 'A' && c <= 'F') |
| c = c - 'A' + 10; |
| else |
| break; |
| v = (v << 4) | c; |
| if (v & 0x100) { |
| if (data) |
| data[len] = v; |
| len++; |
| v = 1; |
| } |
| } |
| return len; |
| } |
| |
| void av_set_pts_info(AVStream *s, int pts_wrap_bits, |
| unsigned int pts_num, unsigned int pts_den) |
| { |
| AVRational new_tb; |
| if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){ |
| if(new_tb.num != pts_num) |
| av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num); |
| }else |
| av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index); |
| |
| if(new_tb.num <= 0 || new_tb.den <= 0) { |
| av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase for st:%d\n", s->index); |
| return; |
| } |
| s->time_base = new_tb; |
| s->pts_wrap_bits = pts_wrap_bits; |
| } |
| |
| int ff_url_join(char *str, int size, const char *proto, |
| const char *authorization, const char *hostname, |
| int port, const char *fmt, ...) |
| { |
| #if CONFIG_NETWORK |
| struct addrinfo hints, *ai; |
| #endif |
| |
| str[0] = '\0'; |
| if (proto) |
| av_strlcatf(str, size, "%s://", proto); |
| if (authorization && authorization[0]) |
| av_strlcatf(str, size, "%s@", authorization); |
| #if CONFIG_NETWORK && defined(AF_INET6) |
| /* Determine if hostname is a numerical IPv6 address, |
| * properly escape it within [] in that case. */ |
| memset(&hints, 0, sizeof(hints)); |
| hints.ai_flags = AI_NUMERICHOST; |
| if (!getaddrinfo(hostname, NULL, &hints, &ai)) { |
| if (ai->ai_family == AF_INET6) { |
| av_strlcat(str, "[", size); |
| av_strlcat(str, hostname, size); |
| av_strlcat(str, "]", size); |
| } else { |
| av_strlcat(str, hostname, size); |
| } |
| freeaddrinfo(ai); |
| } else |
| #endif |
| /* Not an IPv6 address, just output the plain string. */ |
| av_strlcat(str, hostname, size); |
| |
| if (port >= 0) |
| av_strlcatf(str, size, ":%d", port); |
| if (fmt) { |
| va_list vl; |
| int len = strlen(str); |
| |
| va_start(vl, fmt); |
| vsnprintf(str + len, size > len ? size - len : 0, fmt, vl); |
| va_end(vl); |
| } |
| return strlen(str); |
| } |
| |
| int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt, |
| AVFormatContext *src) |
| { |
| AVPacket local_pkt; |
| |
| local_pkt = *pkt; |
| local_pkt.stream_index = dst_stream; |
| if (pkt->pts != AV_NOPTS_VALUE) |
| local_pkt.pts = av_rescale_q(pkt->pts, |
| src->streams[pkt->stream_index]->time_base, |
| dst->streams[dst_stream]->time_base); |
| if (pkt->dts != AV_NOPTS_VALUE) |
| local_pkt.dts = av_rescale_q(pkt->dts, |
| src->streams[pkt->stream_index]->time_base, |
| dst->streams[dst_stream]->time_base); |
| return av_write_frame(dst, &local_pkt); |
| } |
| |
| void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf, |
| void *context) |
| { |
| const char *ptr = str; |
| |
| /* Parse key=value pairs. */ |
| for (;;) { |
| const char *key; |
| char *dest = NULL, *dest_end; |
| int key_len, dest_len = 0; |
| |
| /* Skip whitespace and potential commas. */ |
| while (*ptr && (isspace(*ptr) || *ptr == ',')) |
| ptr++; |
| if (!*ptr) |
| break; |
| |
| key = ptr; |
| |
| if (!(ptr = strchr(key, '='))) |
| break; |
| ptr++; |
| key_len = ptr - key; |
| |
| callback_get_buf(context, key, key_len, &dest, &dest_len); |
| dest_end = dest + dest_len - 1; |
| |
| if (*ptr == '\"') { |
| ptr++; |
| while (*ptr && *ptr != '\"') { |
| if (*ptr == '\\') { |
| if (!ptr[1]) |
| break; |
| if (dest && dest < dest_end) |
| *dest++ = ptr[1]; |
| ptr += 2; |
| } else { |
| if (dest && dest < dest_end) |
| *dest++ = *ptr; |
| ptr++; |
| } |
| } |
| if (*ptr == '\"') |
| ptr++; |
| } else { |
| for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++) |
| if (dest && dest < dest_end) |
| *dest++ = *ptr; |
| } |
| if (dest) |
| *dest = 0; |
| } |
| } |
| |
| int ff_find_stream_index(AVFormatContext *s, int id) |
| { |
| int i; |
| for (i = 0; i < s->nb_streams; i++) { |
| if (s->streams[i]->id == id) |
| return i; |
| } |
| return -1; |
| } |
| |
| void ff_make_absolute_url(char *buf, int size, const char *base, |
| const char *rel) |
| { |
| char *sep; |
| /* Absolute path, relative to the current server */ |
| if (base && strstr(base, "://") && rel[0] == '/') { |
| if (base != buf) |
| av_strlcpy(buf, base, size); |
| sep = strstr(buf, "://"); |
| if (sep) { |
| sep += 3; |
| sep = strchr(sep, '/'); |
| if (sep) |
| *sep = '\0'; |
| } |
| av_strlcat(buf, rel, size); |
| return; |
| } |
| /* If rel actually is an absolute url, just copy it */ |
| if (!base || strstr(rel, "://") || rel[0] == '/') { |
| av_strlcpy(buf, rel, size); |
| return; |
| } |
| if (base != buf) |
| av_strlcpy(buf, base, size); |
| /* Remove the file name from the base url */ |
| sep = strrchr(buf, '/'); |
| if (sep) |
| sep[1] = '\0'; |
| else |
| buf[0] = '\0'; |
| while (av_strstart(rel, "../", NULL) && sep) { |
| /* Remove the path delimiter at the end */ |
| sep[0] = '\0'; |
| sep = strrchr(buf, '/'); |
| /* If the next directory name to pop off is "..", break here */ |
| if (!strcmp(sep ? &sep[1] : buf, "..")) { |
| /* Readd the slash we just removed */ |
| av_strlcat(buf, "/", size); |
| break; |
| } |
| /* Cut off the directory name */ |
| if (sep) |
| sep[1] = '\0'; |
| else |
| buf[0] = '\0'; |
| rel += 3; |
| } |
| av_strlcat(buf, rel, size); |
| } |