| /* |
| * AVI demuxer |
| * Copyright (c) 2001 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 |
| */ |
| |
| #include "libavutil/intreadwrite.h" |
| #include "libavutil/mathematics.h" |
| #include "libavutil/bswap.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/dict.h" |
| #include "libavutil/avstring.h" |
| #include "libavutil/avassert.h" |
| #include "avformat.h" |
| #include "internal.h" |
| #include "avi.h" |
| #include "dv.h" |
| #include "riff.h" |
| |
| typedef struct AVIStream { |
| int64_t frame_offset; /* current frame (video) or byte (audio) counter |
| (used to compute the pts) */ |
| int remaining; |
| int packet_size; |
| |
| uint32_t scale; |
| uint32_t rate; |
| int sample_size; /* size of one sample (or packet) (in the rate/scale sense) in bytes */ |
| |
| int64_t cum_len; /* temporary storage (used during seek) */ |
| |
| int prefix; ///< normally 'd'<<8 + 'c' or 'w'<<8 + 'b' |
| int prefix_count; |
| uint32_t pal[256]; |
| int has_pal; |
| int dshow_block_align; ///< block align variable used to emulate bugs in the MS dshow demuxer |
| |
| AVFormatContext *sub_ctx; |
| AVPacket sub_pkt; |
| uint8_t *sub_buffer; |
| |
| int64_t seek_pos; |
| } AVIStream; |
| |
| typedef struct { |
| const AVClass *class; |
| int64_t riff_end; |
| int64_t movi_end; |
| int64_t fsize; |
| int64_t io_fsize; |
| int64_t movi_list; |
| int64_t last_pkt_pos; |
| int index_loaded; |
| int is_odml; |
| int non_interleaved; |
| int stream_index; |
| DVDemuxContext* dv_demux; |
| int odml_depth; |
| int use_odml; |
| #define MAX_ODML_DEPTH 1000 |
| int64_t dts_max; |
| } AVIContext; |
| |
| |
| static const AVOption options[] = { |
| { "use_odml", "use odml index", offsetof(AVIContext, use_odml), AV_OPT_TYPE_INT, {.i64 = 1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM}, |
| { NULL }, |
| }; |
| |
| static const AVClass demuxer_class = { |
| .class_name = "avi", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| .category = AV_CLASS_CATEGORY_DEMUXER, |
| }; |
| |
| |
| static const char avi_headers[][8] = { |
| { 'R', 'I', 'F', 'F', 'A', 'V', 'I', ' ' }, |
| { 'R', 'I', 'F', 'F', 'A', 'V', 'I', 'X' }, |
| { 'R', 'I', 'F', 'F', 'A', 'V', 'I', 0x19}, |
| { 'O', 'N', '2', ' ', 'O', 'N', '2', 'f' }, |
| { 'R', 'I', 'F', 'F', 'A', 'M', 'V', ' ' }, |
| { 0 } |
| }; |
| |
| static const AVMetadataConv avi_metadata_conv[] = { |
| { "strn", "title" }, |
| { 0 }, |
| }; |
| |
| static int avi_load_index(AVFormatContext *s); |
| static int guess_ni_flag(AVFormatContext *s); |
| |
| #define print_tag(str, tag, size) \ |
| av_dlog(NULL, "%s: tag=%c%c%c%c size=0x%x\n", \ |
| str, tag & 0xff, \ |
| (tag >> 8) & 0xff, \ |
| (tag >> 16) & 0xff, \ |
| (tag >> 24) & 0xff, \ |
| size) |
| |
| static inline int get_duration(AVIStream *ast, int len){ |
| if(ast->sample_size){ |
| return len; |
| }else if (ast->dshow_block_align){ |
| return (len + ast->dshow_block_align - 1)/ast->dshow_block_align; |
| }else |
| return 1; |
| } |
| |
| static int get_riff(AVFormatContext *s, AVIOContext *pb) |
| { |
| AVIContext *avi = s->priv_data; |
| char header[8]; |
| int i; |
| |
| /* check RIFF header */ |
| avio_read(pb, header, 4); |
| avi->riff_end = avio_rl32(pb); /* RIFF chunk size */ |
| avi->riff_end += avio_tell(pb); /* RIFF chunk end */ |
| avio_read(pb, header+4, 4); |
| |
| for(i=0; avi_headers[i][0]; i++) |
| if(!memcmp(header, avi_headers[i], 8)) |
| break; |
| if(!avi_headers[i][0]) |
| return AVERROR_INVALIDDATA; |
| |
| if(header[7] == 0x19) |
| av_log(s, AV_LOG_INFO, "This file has been generated by a totally broken muxer.\n"); |
| |
| return 0; |
| } |
| |
| static int read_braindead_odml_indx(AVFormatContext *s, int frame_num){ |
| AVIContext *avi = s->priv_data; |
| AVIOContext *pb = s->pb; |
| int longs_pre_entry= avio_rl16(pb); |
| int index_sub_type = avio_r8(pb); |
| int index_type = avio_r8(pb); |
| int entries_in_use = avio_rl32(pb); |
| int chunk_id = avio_rl32(pb); |
| int64_t base = avio_rl64(pb); |
| int stream_id= 10*((chunk_id&0xFF) - '0') + (((chunk_id>>8)&0xFF) - '0'); |
| AVStream *st; |
| AVIStream *ast; |
| int i; |
| int64_t last_pos= -1; |
| int64_t filesize= avi->fsize; |
| |
| av_dlog(s, "longs_pre_entry:%d index_type:%d entries_in_use:%d chunk_id:%X base:%16"PRIX64"\n", |
| longs_pre_entry,index_type, entries_in_use, chunk_id, base); |
| |
| if(stream_id >= s->nb_streams || stream_id < 0) |
| return AVERROR_INVALIDDATA; |
| st= s->streams[stream_id]; |
| ast = st->priv_data; |
| |
| if(index_sub_type) |
| return AVERROR_INVALIDDATA; |
| |
| avio_rl32(pb); |
| |
| if(index_type && longs_pre_entry != 2) |
| return AVERROR_INVALIDDATA; |
| if(index_type>1) |
| return AVERROR_INVALIDDATA; |
| |
| if(filesize > 0 && base >= filesize){ |
| av_log(s, AV_LOG_ERROR, "ODML index invalid\n"); |
| if(base>>32 == (base & 0xFFFFFFFF) && (base & 0xFFFFFFFF) < filesize && filesize <= 0xFFFFFFFF) |
| base &= 0xFFFFFFFF; |
| else |
| return AVERROR_INVALIDDATA; |
| } |
| |
| for(i=0; i<entries_in_use; i++){ |
| if(index_type){ |
| int64_t pos= avio_rl32(pb) + base - 8; |
| int len = avio_rl32(pb); |
| int key= len >= 0; |
| len &= 0x7FFFFFFF; |
| |
| #ifdef DEBUG_SEEK |
| av_log(s, AV_LOG_ERROR, "pos:%"PRId64", len:%X\n", pos, len); |
| #endif |
| if(url_feof(pb)) |
| return AVERROR_INVALIDDATA; |
| |
| if(last_pos == pos || pos == base - 8) |
| avi->non_interleaved= 1; |
| if(last_pos != pos && (len || !ast->sample_size)) |
| av_add_index_entry(st, pos, ast->cum_len, len, 0, key ? AVINDEX_KEYFRAME : 0); |
| |
| ast->cum_len += get_duration(ast, len); |
| last_pos= pos; |
| }else{ |
| int64_t offset, pos; |
| int duration; |
| offset = avio_rl64(pb); |
| avio_rl32(pb); /* size */ |
| duration = avio_rl32(pb); |
| |
| if(url_feof(pb)) |
| return AVERROR_INVALIDDATA; |
| |
| pos = avio_tell(pb); |
| |
| if(avi->odml_depth > MAX_ODML_DEPTH){ |
| av_log(s, AV_LOG_ERROR, "Too deeply nested ODML indexes\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if(avio_seek(pb, offset+8, SEEK_SET) < 0) |
| return -1; |
| avi->odml_depth++; |
| read_braindead_odml_indx(s, frame_num); |
| avi->odml_depth--; |
| frame_num += duration; |
| |
| if(avio_seek(pb, pos, SEEK_SET) < 0) { |
| av_log(s, AV_LOG_ERROR, "Failed to restore position after reading index\n"); |
| return -1; |
| } |
| |
| } |
| } |
| avi->index_loaded=2; |
| return 0; |
| } |
| |
| static void clean_index(AVFormatContext *s){ |
| int i; |
| int64_t j; |
| |
| for(i=0; i<s->nb_streams; i++){ |
| AVStream *st = s->streams[i]; |
| AVIStream *ast = st->priv_data; |
| int n= st->nb_index_entries; |
| int max= ast->sample_size; |
| int64_t pos, size, ts; |
| |
| if(n != 1 || ast->sample_size==0) |
| continue; |
| |
| while(max < 1024) max+=max; |
| |
| pos= st->index_entries[0].pos; |
| size= st->index_entries[0].size; |
| ts= st->index_entries[0].timestamp; |
| |
| for(j=0; j<size; j+=max){ |
| av_add_index_entry(st, pos+j, ts+j, FFMIN(max, size-j), 0, AVINDEX_KEYFRAME); |
| } |
| } |
| } |
| |
| static int avi_read_tag(AVFormatContext *s, AVStream *st, uint32_t tag, uint32_t size) |
| { |
| AVIOContext *pb = s->pb; |
| char key[5] = {0}, *value; |
| |
| size += (size & 1); |
| |
| if (size == UINT_MAX) |
| return AVERROR(EINVAL); |
| value = av_malloc(size+1); |
| if (!value) |
| return AVERROR(ENOMEM); |
| avio_read(pb, value, size); |
| value[size]=0; |
| |
| AV_WL32(key, tag); |
| |
| return av_dict_set(st ? &st->metadata : &s->metadata, key, value, |
| AV_DICT_DONT_STRDUP_VAL); |
| } |
| |
| static const char months[12][4] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", |
| "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }; |
| |
| static void avi_metadata_creation_time(AVDictionary **metadata, char *date) |
| { |
| char month[4], time[9], buffer[64]; |
| int i, day, year; |
| /* parse standard AVI date format (ie. "Mon Mar 10 15:04:43 2003") */ |
| if (sscanf(date, "%*3s%*[ ]%3s%*[ ]%2d%*[ ]%8s%*[ ]%4d", |
| month, &day, time, &year) == 4) { |
| for (i=0; i<12; i++) |
| if (!av_strcasecmp(month, months[i])) { |
| snprintf(buffer, sizeof(buffer), "%.4d-%.2d-%.2d %s", |
| year, i+1, day, time); |
| av_dict_set(metadata, "creation_time", buffer, 0); |
| } |
| } else if (date[4] == '/' && date[7] == '/') { |
| date[4] = date[7] = '-'; |
| av_dict_set(metadata, "creation_time", date, 0); |
| } |
| } |
| |
| static void avi_read_nikon(AVFormatContext *s, uint64_t end) |
| { |
| while (avio_tell(s->pb) < end) { |
| uint32_t tag = avio_rl32(s->pb); |
| uint32_t size = avio_rl32(s->pb); |
| switch (tag) { |
| case MKTAG('n', 'c', 't', 'g'): { /* Nikon Tags */ |
| uint64_t tag_end = avio_tell(s->pb) + size; |
| while (avio_tell(s->pb) < tag_end) { |
| uint16_t tag = avio_rl16(s->pb); |
| uint16_t size = avio_rl16(s->pb); |
| const char *name = NULL; |
| char buffer[64] = {0}; |
| size -= avio_read(s->pb, buffer, |
| FFMIN(size, sizeof(buffer)-1)); |
| switch (tag) { |
| case 0x03: name = "maker"; break; |
| case 0x04: name = "model"; break; |
| case 0x13: name = "creation_time"; |
| if (buffer[4] == ':' && buffer[7] == ':') |
| buffer[4] = buffer[7] = '-'; |
| break; |
| } |
| if (name) |
| av_dict_set(&s->metadata, name, buffer, 0); |
| avio_skip(s->pb, size); |
| } |
| break; |
| } |
| default: |
| avio_skip(s->pb, size); |
| break; |
| } |
| } |
| } |
| |
| static int avi_read_header(AVFormatContext *s) |
| { |
| AVIContext *avi = s->priv_data; |
| AVIOContext *pb = s->pb; |
| unsigned int tag, tag1, handler; |
| int codec_type, stream_index, frame_period; |
| unsigned int size; |
| int i; |
| AVStream *st; |
| AVIStream *ast = NULL; |
| int avih_width=0, avih_height=0; |
| int amv_file_format=0; |
| uint64_t list_end = 0; |
| int ret; |
| AVDictionaryEntry *dict_entry; |
| |
| avi->stream_index= -1; |
| |
| ret = get_riff(s, pb); |
| if (ret < 0) |
| return ret; |
| |
| av_log(avi, AV_LOG_DEBUG, "use odml:%d\n", avi->use_odml); |
| |
| avi->io_fsize = avi->fsize = avio_size(pb); |
| if(avi->fsize<=0 || avi->fsize < avi->riff_end) |
| avi->fsize= avi->riff_end == 8 ? INT64_MAX : avi->riff_end; |
| |
| /* first list tag */ |
| stream_index = -1; |
| codec_type = -1; |
| frame_period = 0; |
| for(;;) { |
| if (url_feof(pb)) |
| goto fail; |
| tag = avio_rl32(pb); |
| size = avio_rl32(pb); |
| |
| print_tag("tag", tag, size); |
| |
| switch(tag) { |
| case MKTAG('L', 'I', 'S', 'T'): |
| list_end = avio_tell(pb) + size; |
| /* Ignored, except at start of video packets. */ |
| tag1 = avio_rl32(pb); |
| |
| print_tag("list", tag1, 0); |
| |
| if (tag1 == MKTAG('m', 'o', 'v', 'i')) { |
| avi->movi_list = avio_tell(pb) - 4; |
| if(size) avi->movi_end = avi->movi_list + size + (size & 1); |
| else avi->movi_end = avi->fsize; |
| av_dlog(NULL, "movi end=%"PRIx64"\n", avi->movi_end); |
| goto end_of_header; |
| } |
| else if (tag1 == MKTAG('I', 'N', 'F', 'O')) |
| ff_read_riff_info(s, size - 4); |
| else if (tag1 == MKTAG('n', 'c', 'd', 't')) |
| avi_read_nikon(s, list_end); |
| |
| break; |
| case MKTAG('I', 'D', 'I', 'T'): { |
| unsigned char date[64] = {0}; |
| size += (size & 1); |
| size -= avio_read(pb, date, FFMIN(size, sizeof(date)-1)); |
| avio_skip(pb, size); |
| avi_metadata_creation_time(&s->metadata, date); |
| break; |
| } |
| case MKTAG('d', 'm', 'l', 'h'): |
| avi->is_odml = 1; |
| avio_skip(pb, size + (size & 1)); |
| break; |
| case MKTAG('a', 'm', 'v', 'h'): |
| amv_file_format=1; |
| case MKTAG('a', 'v', 'i', 'h'): |
| /* AVI header */ |
| /* using frame_period is bad idea */ |
| frame_period = avio_rl32(pb); |
| avio_rl32(pb); /* max. bytes per second */ |
| avio_rl32(pb); |
| avi->non_interleaved |= avio_rl32(pb) & AVIF_MUSTUSEINDEX; |
| |
| avio_skip(pb, 2 * 4); |
| avio_rl32(pb); |
| avio_rl32(pb); |
| avih_width=avio_rl32(pb); |
| avih_height=avio_rl32(pb); |
| |
| avio_skip(pb, size - 10 * 4); |
| break; |
| case MKTAG('s', 't', 'r', 'h'): |
| /* stream header */ |
| |
| tag1 = avio_rl32(pb); |
| handler = avio_rl32(pb); /* codec tag */ |
| |
| if(tag1 == MKTAG('p', 'a', 'd', 's')){ |
| avio_skip(pb, size - 8); |
| break; |
| }else{ |
| stream_index++; |
| st = avformat_new_stream(s, NULL); |
| if (!st) |
| goto fail; |
| |
| st->id = stream_index; |
| ast = av_mallocz(sizeof(AVIStream)); |
| if (!ast) |
| goto fail; |
| st->priv_data = ast; |
| } |
| if(amv_file_format) |
| tag1 = stream_index ? MKTAG('a','u','d','s') : MKTAG('v','i','d','s'); |
| |
| print_tag("strh", tag1, -1); |
| |
| if(tag1 == MKTAG('i', 'a', 'v', 's') || tag1 == MKTAG('i', 'v', 'a', 's')){ |
| int64_t dv_dur; |
| |
| /* |
| * After some consideration -- I don't think we |
| * have to support anything but DV in type1 AVIs. |
| */ |
| if (s->nb_streams != 1) |
| goto fail; |
| |
| if (handler != MKTAG('d', 'v', 's', 'd') && |
| handler != MKTAG('d', 'v', 'h', 'd') && |
| handler != MKTAG('d', 'v', 's', 'l')) |
| goto fail; |
| |
| ast = s->streams[0]->priv_data; |
| av_freep(&s->streams[0]->codec->extradata); |
| av_freep(&s->streams[0]->codec); |
| if (s->streams[0]->info) |
| av_freep(&s->streams[0]->info->duration_error); |
| av_freep(&s->streams[0]->info); |
| av_freep(&s->streams[0]); |
| s->nb_streams = 0; |
| if (CONFIG_DV_DEMUXER) { |
| avi->dv_demux = avpriv_dv_init_demux(s); |
| if (!avi->dv_demux) |
| goto fail; |
| } |
| s->streams[0]->priv_data = ast; |
| avio_skip(pb, 3 * 4); |
| ast->scale = avio_rl32(pb); |
| ast->rate = avio_rl32(pb); |
| avio_skip(pb, 4); /* start time */ |
| |
| dv_dur = avio_rl32(pb); |
| if (ast->scale > 0 && ast->rate > 0 && dv_dur > 0) { |
| dv_dur *= AV_TIME_BASE; |
| s->duration = av_rescale(dv_dur, ast->scale, ast->rate); |
| } |
| /* |
| * else, leave duration alone; timing estimation in utils.c |
| * will make a guess based on bitrate. |
| */ |
| |
| stream_index = s->nb_streams - 1; |
| avio_skip(pb, size - 9*4); |
| break; |
| } |
| |
| av_assert0(stream_index < s->nb_streams); |
| st->codec->stream_codec_tag= handler; |
| |
| avio_rl32(pb); /* flags */ |
| avio_rl16(pb); /* priority */ |
| avio_rl16(pb); /* language */ |
| avio_rl32(pb); /* initial frame */ |
| ast->scale = avio_rl32(pb); |
| ast->rate = avio_rl32(pb); |
| if(!(ast->scale && ast->rate)){ |
| av_log(s, AV_LOG_WARNING, "scale/rate is %u/%u which is invalid. (This file has been generated by broken software.)\n", ast->scale, ast->rate); |
| if(frame_period){ |
| ast->rate = 1000000; |
| ast->scale = frame_period; |
| }else{ |
| ast->rate = 25; |
| ast->scale = 1; |
| } |
| } |
| avpriv_set_pts_info(st, 64, ast->scale, ast->rate); |
| |
| ast->cum_len=avio_rl32(pb); /* start */ |
| st->nb_frames = avio_rl32(pb); |
| |
| st->start_time = 0; |
| avio_rl32(pb); /* buffer size */ |
| avio_rl32(pb); /* quality */ |
| if (ast->cum_len*ast->scale/ast->rate > 3600) { |
| av_log(s, AV_LOG_ERROR, "crazy start time, iam scared, giving up\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| ast->sample_size = avio_rl32(pb); /* sample ssize */ |
| ast->cum_len *= FFMAX(1, ast->sample_size); |
| av_dlog(s, "%"PRIu32" %"PRIu32" %d\n", |
| ast->rate, ast->scale, ast->sample_size); |
| |
| switch(tag1) { |
| case MKTAG('v', 'i', 'd', 's'): |
| codec_type = AVMEDIA_TYPE_VIDEO; |
| |
| ast->sample_size = 0; |
| break; |
| case MKTAG('a', 'u', 'd', 's'): |
| codec_type = AVMEDIA_TYPE_AUDIO; |
| break; |
| case MKTAG('t', 'x', 't', 's'): |
| codec_type = AVMEDIA_TYPE_SUBTITLE; |
| break; |
| case MKTAG('d', 'a', 't', 's'): |
| codec_type = AVMEDIA_TYPE_DATA; |
| break; |
| default: |
| av_log(s, AV_LOG_INFO, "unknown stream type %X\n", tag1); |
| } |
| if(ast->sample_size == 0) { |
| st->duration = st->nb_frames; |
| if (st->duration > 0 && avi->io_fsize > 0 && avi->riff_end > avi->io_fsize) { |
| av_log(s, AV_LOG_DEBUG, "File is truncated adjusting duration\n"); |
| st->duration = av_rescale(st->duration, avi->io_fsize, avi->riff_end); |
| } |
| } |
| ast->frame_offset= ast->cum_len; |
| avio_skip(pb, size - 12 * 4); |
| break; |
| case MKTAG('s', 't', 'r', 'f'): |
| /* stream header */ |
| if (!size) |
| break; |
| if (stream_index >= (unsigned)s->nb_streams || avi->dv_demux) { |
| avio_skip(pb, size); |
| } else { |
| uint64_t cur_pos = avio_tell(pb); |
| unsigned esize; |
| if (cur_pos < list_end) |
| size = FFMIN(size, list_end - cur_pos); |
| st = s->streams[stream_index]; |
| switch(codec_type) { |
| case AVMEDIA_TYPE_VIDEO: |
| if(amv_file_format){ |
| st->codec->width=avih_width; |
| st->codec->height=avih_height; |
| st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
| st->codec->codec_id = AV_CODEC_ID_AMV; |
| avio_skip(pb, size); |
| break; |
| } |
| tag1 = ff_get_bmp_header(pb, st, &esize); |
| |
| if (tag1 == MKTAG('D', 'X', 'S', 'B') || tag1 == MKTAG('D','X','S','A')) { |
| st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; |
| st->codec->codec_tag = tag1; |
| st->codec->codec_id = AV_CODEC_ID_XSUB; |
| break; |
| } |
| |
| if(size > 10*4 && size<(1<<30) && size < avi->fsize){ |
| if(esize == size-1 && (esize&1)) st->codec->extradata_size= esize - 10*4; |
| else st->codec->extradata_size= size - 10*4; |
| st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
| if (!st->codec->extradata) { |
| st->codec->extradata_size= 0; |
| return AVERROR(ENOMEM); |
| } |
| avio_read(pb, st->codec->extradata, st->codec->extradata_size); |
| } |
| |
| if(st->codec->extradata_size & 1) //FIXME check if the encoder really did this correctly |
| avio_r8(pb); |
| |
| /* Extract palette from extradata if bpp <= 8. */ |
| /* This code assumes that extradata contains only palette. */ |
| /* This is true for all paletted codecs implemented in FFmpeg. */ |
| if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) { |
| int pal_size = (1 << st->codec->bits_per_coded_sample) << 2; |
| const uint8_t *pal_src; |
| |
| pal_size = FFMIN(pal_size, st->codec->extradata_size); |
| pal_src = st->codec->extradata + st->codec->extradata_size - pal_size; |
| for (i = 0; i < pal_size/4; i++) |
| ast->pal[i] = 0xFFU<<24 | AV_RL32(pal_src+4*i); |
| ast->has_pal = 1; |
| } |
| |
| print_tag("video", tag1, 0); |
| |
| st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
| st->codec->codec_tag = tag1; |
| st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1); |
| st->need_parsing = AVSTREAM_PARSE_HEADERS; // This is needed to get the pict type which is necessary for generating correct pts. |
| |
| if(st->codec->codec_tag==0 && st->codec->height > 0 && st->codec->extradata_size < 1U<<30){ |
| st->codec->extradata_size+= 9; |
| st->codec->extradata= av_realloc_f(st->codec->extradata, 1, st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
| if(st->codec->extradata) |
| memcpy(st->codec->extradata + st->codec->extradata_size - 9, "BottomUp", 9); |
| } |
| st->codec->height= FFABS(st->codec->height); |
| |
| // avio_skip(pb, size - 5 * 4); |
| break; |
| case AVMEDIA_TYPE_AUDIO: |
| ret = ff_get_wav_header(pb, st->codec, size); |
| if (ret < 0) |
| return ret; |
| ast->dshow_block_align= st->codec->block_align; |
| if(ast->sample_size && st->codec->block_align && ast->sample_size != st->codec->block_align){ |
| av_log(s, AV_LOG_WARNING, "sample size (%d) != block align (%d)\n", ast->sample_size, st->codec->block_align); |
| ast->sample_size= st->codec->block_align; |
| } |
| if (size&1) /* 2-aligned (fix for Stargate SG-1 - 3x18 - Shades of Grey.avi) */ |
| avio_skip(pb, 1); |
| /* Force parsing as several audio frames can be in |
| * one packet and timestamps refer to packet start. */ |
| st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS; |
| /* ADTS header is in extradata, AAC without header must be |
| * stored as exact frames. Parser not needed and it will |
| * fail. */ |
| if (st->codec->codec_id == AV_CODEC_ID_AAC && st->codec->extradata_size) |
| st->need_parsing = AVSTREAM_PARSE_NONE; |
| /* AVI files with Xan DPCM audio (wrongly) declare PCM |
| * audio in the header but have Axan as stream_code_tag. */ |
| if (st->codec->stream_codec_tag == AV_RL32("Axan")){ |
| st->codec->codec_id = AV_CODEC_ID_XAN_DPCM; |
| st->codec->codec_tag = 0; |
| ast->dshow_block_align = 0; |
| } |
| if (amv_file_format){ |
| st->codec->codec_id = AV_CODEC_ID_ADPCM_IMA_AMV; |
| ast->dshow_block_align = 0; |
| } |
| if(st->codec->codec_id == AV_CODEC_ID_AAC && ast->dshow_block_align <= 4 && ast->dshow_block_align) { |
| av_log(s, AV_LOG_DEBUG, "overriding invalid dshow_block_align of %d\n", ast->dshow_block_align); |
| ast->dshow_block_align = 0; |
| } |
| if(st->codec->codec_id == AV_CODEC_ID_AAC && ast->dshow_block_align == 1024 && ast->sample_size == 1024 || |
| st->codec->codec_id == AV_CODEC_ID_AAC && ast->dshow_block_align == 4096 && ast->sample_size == 4096 || |
| st->codec->codec_id == AV_CODEC_ID_MP3 && ast->dshow_block_align == 1152 && ast->sample_size == 1152) { |
| av_log(s, AV_LOG_DEBUG, "overriding sample_size\n"); |
| ast->sample_size = 0; |
| } |
| break; |
| case AVMEDIA_TYPE_SUBTITLE: |
| st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; |
| st->request_probe= 1; |
| avio_skip(pb, size); |
| break; |
| default: |
| st->codec->codec_type = AVMEDIA_TYPE_DATA; |
| st->codec->codec_id= AV_CODEC_ID_NONE; |
| st->codec->codec_tag= 0; |
| avio_skip(pb, size); |
| break; |
| } |
| } |
| break; |
| case MKTAG('s', 't', 'r', 'd'): |
| if (stream_index >= (unsigned)s->nb_streams |
| || s->streams[stream_index]->codec->extradata_size |
| || s->streams[stream_index]->codec->codec_tag == MKTAG('H','2','6','4')) { |
| avio_skip(pb, size); |
| } else { |
| uint64_t cur_pos = avio_tell(pb); |
| if (cur_pos < list_end) |
| size = FFMIN(size, list_end - cur_pos); |
| st = s->streams[stream_index]; |
| |
| if(size<(1<<30)){ |
| st->codec->extradata_size= size; |
| st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
| if (!st->codec->extradata) { |
| st->codec->extradata_size= 0; |
| return AVERROR(ENOMEM); |
| } |
| avio_read(pb, st->codec->extradata, st->codec->extradata_size); |
| } |
| |
| if(st->codec->extradata_size & 1) //FIXME check if the encoder really did this correctly |
| avio_r8(pb); |
| } |
| break; |
| case MKTAG('i', 'n', 'd', 'x'): |
| i= avio_tell(pb); |
| if(pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) && avi->use_odml && |
| read_braindead_odml_indx(s, 0) < 0 && (s->error_recognition & AV_EF_EXPLODE)) |
| goto fail; |
| avio_seek(pb, i+size, SEEK_SET); |
| break; |
| case MKTAG('v', 'p', 'r', 'p'): |
| if(stream_index < (unsigned)s->nb_streams && size > 9*4){ |
| AVRational active, active_aspect; |
| |
| st = s->streams[stream_index]; |
| avio_rl32(pb); |
| avio_rl32(pb); |
| avio_rl32(pb); |
| avio_rl32(pb); |
| avio_rl32(pb); |
| |
| active_aspect.den= avio_rl16(pb); |
| active_aspect.num= avio_rl16(pb); |
| active.num = avio_rl32(pb); |
| active.den = avio_rl32(pb); |
| avio_rl32(pb); //nbFieldsPerFrame |
| |
| if(active_aspect.num && active_aspect.den && active.num && active.den){ |
| st->sample_aspect_ratio= av_div_q(active_aspect, active); |
| av_dlog(s, "vprp %d/%d %d/%d\n", |
| active_aspect.num, active_aspect.den, |
| active.num, active.den); |
| } |
| size -= 9*4; |
| } |
| avio_skip(pb, size); |
| break; |
| case MKTAG('s', 't', 'r', 'n'): |
| if(s->nb_streams){ |
| ret = avi_read_tag(s, s->streams[s->nb_streams-1], tag, size); |
| if (ret < 0) |
| return ret; |
| break; |
| } |
| default: |
| if(size > 1000000){ |
| av_log(s, AV_LOG_ERROR, "Something went wrong during header parsing, " |
| "I will ignore it and try to continue anyway.\n"); |
| if (s->error_recognition & AV_EF_EXPLODE) |
| goto fail; |
| avi->movi_list = avio_tell(pb) - 4; |
| avi->movi_end = avi->fsize; |
| goto end_of_header; |
| } |
| /* skip tag */ |
| size += (size & 1); |
| avio_skip(pb, size); |
| break; |
| } |
| } |
| end_of_header: |
| /* check stream number */ |
| if (stream_index != s->nb_streams - 1) { |
| fail: |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if(!avi->index_loaded && pb->seekable) |
| avi_load_index(s); |
| avi->index_loaded |= 1; |
| avi->non_interleaved |= guess_ni_flag(s) | (s->flags & AVFMT_FLAG_SORT_DTS); |
| |
| dict_entry = av_dict_get(s->metadata, "ISFT", NULL, 0); |
| if (dict_entry && !strcmp(dict_entry->value, "PotEncoder")) |
| for (i=0; i<s->nb_streams; i++) { |
| AVStream *st = s->streams[i]; |
| if ( st->codec->codec_id == AV_CODEC_ID_MPEG1VIDEO |
| || st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO) |
| st->need_parsing = AVSTREAM_PARSE_FULL; |
| } |
| |
| for(i=0; i<s->nb_streams; i++){ |
| AVStream *st = s->streams[i]; |
| if(st->nb_index_entries) |
| break; |
| } |
| // DV-in-AVI cannot be non-interleaved, if set this must be |
| // a mis-detection. |
| if(avi->dv_demux) |
| avi->non_interleaved=0; |
| if(i==s->nb_streams && avi->non_interleaved) { |
| av_log(s, AV_LOG_WARNING, "non-interleaved AVI without index, switching to interleaved\n"); |
| avi->non_interleaved=0; |
| } |
| |
| if(avi->non_interleaved) { |
| av_log(s, AV_LOG_INFO, "non-interleaved AVI\n"); |
| clean_index(s); |
| } |
| |
| ff_metadata_conv_ctx(s, NULL, avi_metadata_conv); |
| ff_metadata_conv_ctx(s, NULL, ff_riff_info_conv); |
| |
| return 0; |
| } |
| |
| static int read_gab2_sub(AVStream *st, AVPacket *pkt) { |
| if (pkt->data && !strcmp(pkt->data, "GAB2") && AV_RL16(pkt->data+5) == 2) { |
| uint8_t desc[256]; |
| int score = AVPROBE_SCORE_EXTENSION, ret; |
| AVIStream *ast = st->priv_data; |
| AVInputFormat *sub_demuxer; |
| AVRational time_base; |
| AVIOContext *pb = avio_alloc_context( pkt->data + 7, |
| pkt->size - 7, |
| 0, NULL, NULL, NULL, NULL); |
| AVProbeData pd; |
| unsigned int desc_len = avio_rl32(pb); |
| |
| if (desc_len > pb->buf_end - pb->buf_ptr) |
| goto error; |
| |
| ret = avio_get_str16le(pb, desc_len, desc, sizeof(desc)); |
| avio_skip(pb, desc_len - ret); |
| if (*desc) |
| av_dict_set(&st->metadata, "title", desc, 0); |
| |
| avio_rl16(pb); /* flags? */ |
| avio_rl32(pb); /* data size */ |
| |
| pd = (AVProbeData) { .buf = pb->buf_ptr, .buf_size = pb->buf_end - pb->buf_ptr }; |
| if (!(sub_demuxer = av_probe_input_format2(&pd, 1, &score))) |
| goto error; |
| |
| if (!(ast->sub_ctx = avformat_alloc_context())) |
| goto error; |
| |
| ast->sub_ctx->pb = pb; |
| if (!avformat_open_input(&ast->sub_ctx, "", sub_demuxer, NULL)) { |
| ff_read_packet(ast->sub_ctx, &ast->sub_pkt); |
| *st->codec = *ast->sub_ctx->streams[0]->codec; |
| ast->sub_ctx->streams[0]->codec->extradata = NULL; |
| time_base = ast->sub_ctx->streams[0]->time_base; |
| avpriv_set_pts_info(st, 64, time_base.num, time_base.den); |
| } |
| ast->sub_buffer = pkt->data; |
| memset(pkt, 0, sizeof(*pkt)); |
| return 1; |
| error: |
| av_freep(&pb); |
| } |
| return 0; |
| } |
| |
| static AVStream *get_subtitle_pkt(AVFormatContext *s, AVStream *next_st, |
| AVPacket *pkt) |
| { |
| AVIStream *ast, *next_ast = next_st->priv_data; |
| int64_t ts, next_ts, ts_min = INT64_MAX; |
| AVStream *st, *sub_st = NULL; |
| int i; |
| |
| next_ts = av_rescale_q(next_ast->frame_offset, next_st->time_base, |
| AV_TIME_BASE_Q); |
| |
| for (i=0; i<s->nb_streams; i++) { |
| st = s->streams[i]; |
| ast = st->priv_data; |
| if (st->discard < AVDISCARD_ALL && ast && ast->sub_pkt.data) { |
| ts = av_rescale_q(ast->sub_pkt.dts, st->time_base, AV_TIME_BASE_Q); |
| if (ts <= next_ts && ts < ts_min) { |
| ts_min = ts; |
| sub_st = st; |
| } |
| } |
| } |
| |
| if (sub_st) { |
| ast = sub_st->priv_data; |
| *pkt = ast->sub_pkt; |
| pkt->stream_index = sub_st->index; |
| if (ff_read_packet(ast->sub_ctx, &ast->sub_pkt) < 0) |
| ast->sub_pkt.data = NULL; |
| } |
| return sub_st; |
| } |
| |
| static int get_stream_idx(int *d){ |
| if( d[0] >= '0' && d[0] <= '9' |
| && d[1] >= '0' && d[1] <= '9'){ |
| return (d[0] - '0') * 10 + (d[1] - '0'); |
| }else{ |
| return 100; //invalid stream ID |
| } |
| } |
| |
| /** |
| * |
| * @param exit_early set to 1 to just gather packet position without making the changes needed to actually read & return the packet |
| */ |
| static int avi_sync(AVFormatContext *s, int exit_early) |
| { |
| AVIContext *avi = s->priv_data; |
| AVIOContext *pb = s->pb; |
| int n; |
| unsigned int d[8]; |
| unsigned int size; |
| int64_t i, sync; |
| |
| start_sync: |
| memset(d, -1, sizeof(d)); |
| for(i=sync=avio_tell(pb); !url_feof(pb); i++) { |
| int j; |
| |
| for(j=0; j<7; j++) |
| d[j]= d[j+1]; |
| d[7]= avio_r8(pb); |
| |
| size= d[4] + (d[5]<<8) + (d[6]<<16) + (d[7]<<24); |
| |
| n= get_stream_idx(d+2); |
| av_dlog(s, "%X %X %X %X %X %X %X %X %"PRId64" %u %d\n", |
| d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7], i, size, n); |
| if(i*(avi->io_fsize>0) + (uint64_t)size > avi->fsize || d[0] > 127) |
| continue; |
| |
| //parse ix## |
| if( (d[0] == 'i' && d[1] == 'x' && n < s->nb_streams) |
| //parse JUNK |
| ||(d[0] == 'J' && d[1] == 'U' && d[2] == 'N' && d[3] == 'K') |
| ||(d[0] == 'i' && d[1] == 'd' && d[2] == 'x' && d[3] == '1')){ |
| avio_skip(pb, size); |
| goto start_sync; |
| } |
| |
| //parse stray LIST |
| if(d[0] == 'L' && d[1] == 'I' && d[2] == 'S' && d[3] == 'T'){ |
| avio_skip(pb, 4); |
| goto start_sync; |
| } |
| |
| n= get_stream_idx(d); |
| |
| if(!((i-avi->last_pkt_pos)&1) && get_stream_idx(d+1) < s->nb_streams) |
| continue; |
| |
| //detect ##ix chunk and skip |
| if(d[2] == 'i' && d[3] == 'x' && n < s->nb_streams){ |
| avio_skip(pb, size); |
| goto start_sync; |
| } |
| |
| //parse ##dc/##wb |
| if(n < s->nb_streams){ |
| AVStream *st; |
| AVIStream *ast; |
| st = s->streams[n]; |
| ast = st->priv_data; |
| |
| if (!ast) { |
| av_log(s, AV_LOG_WARNING, "Skiping foreign stream %d packet\n", n); |
| continue; |
| } |
| |
| if(s->nb_streams>=2){ |
| AVStream *st1 = s->streams[1]; |
| AVIStream *ast1= st1->priv_data; |
| //workaround for broken small-file-bug402.avi |
| if( d[2] == 'w' && d[3] == 'b' |
| && n==0 |
| && st ->codec->codec_type == AVMEDIA_TYPE_VIDEO |
| && st1->codec->codec_type == AVMEDIA_TYPE_AUDIO |
| && ast->prefix == 'd'*256+'c' |
| && (d[2]*256+d[3] == ast1->prefix || !ast1->prefix_count) |
| ){ |
| n=1; |
| st = st1; |
| ast = ast1; |
| av_log(s, AV_LOG_WARNING, "Invalid stream + prefix combination, assuming audio.\n"); |
| } |
| } |
| |
| |
| if( (st->discard >= AVDISCARD_DEFAULT && size==0) |
| /*|| (st->discard >= AVDISCARD_NONKEY && !(pkt->flags & AV_PKT_FLAG_KEY))*/ //FIXME needs a little reordering |
| || st->discard >= AVDISCARD_ALL){ |
| if (!exit_early) { |
| ast->frame_offset += get_duration(ast, size); |
| avio_skip(pb, size); |
| goto start_sync; |
| } |
| } |
| |
| if (d[2] == 'p' && d[3] == 'c' && size<=4*256+4) { |
| int k = avio_r8(pb); |
| int last = (k + avio_r8(pb) - 1) & 0xFF; |
| |
| avio_rl16(pb); //flags |
| |
| for (; k <= last; k++) |
| ast->pal[k] = 0xFFU<<24 | avio_rb32(pb)>>8;// b + (g << 8) + (r << 16); |
| ast->has_pal= 1; |
| goto start_sync; |
| } else if( ((ast->prefix_count<5 || sync+9 > i) && d[2]<128 && d[3]<128) || |
| d[2]*256+d[3] == ast->prefix /*|| |
| (d[2] == 'd' && d[3] == 'c') || |
| (d[2] == 'w' && d[3] == 'b')*/) { |
| |
| if (exit_early) |
| return 0; |
| if(d[2]*256+d[3] == ast->prefix) |
| ast->prefix_count++; |
| else{ |
| ast->prefix= d[2]*256+d[3]; |
| ast->prefix_count= 0; |
| } |
| |
| avi->stream_index= n; |
| ast->packet_size= size + 8; |
| ast->remaining= size; |
| |
| if(size || !ast->sample_size){ |
| uint64_t pos= avio_tell(pb) - 8; |
| if(!st->index_entries || !st->nb_index_entries || st->index_entries[st->nb_index_entries - 1].pos < pos){ |
| av_add_index_entry(st, pos, ast->frame_offset, size, 0, AVINDEX_KEYFRAME); |
| } |
| } |
| return 0; |
| } |
| } |
| } |
| |
| if(pb->error) |
| return pb->error; |
| return AVERROR_EOF; |
| } |
| |
| static int avi_read_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| AVIContext *avi = s->priv_data; |
| AVIOContext *pb = s->pb; |
| int err; |
| #if FF_API_DESTRUCT_PACKET |
| void* dstr; |
| #endif |
| |
| if (CONFIG_DV_DEMUXER && avi->dv_demux) { |
| int size = avpriv_dv_get_packet(avi->dv_demux, pkt); |
| if (size >= 0) |
| return size; |
| } |
| |
| if(avi->non_interleaved){ |
| int best_stream_index = 0; |
| AVStream *best_st= NULL; |
| AVIStream *best_ast; |
| int64_t best_ts= INT64_MAX; |
| int i; |
| |
| for(i=0; i<s->nb_streams; i++){ |
| AVStream *st = s->streams[i]; |
| AVIStream *ast = st->priv_data; |
| int64_t ts= ast->frame_offset; |
| int64_t last_ts; |
| |
| if(!st->nb_index_entries) |
| continue; |
| |
| last_ts = st->index_entries[st->nb_index_entries - 1].timestamp; |
| if(!ast->remaining && ts > last_ts) |
| continue; |
| |
| ts = av_rescale_q(ts, st->time_base, (AVRational){FFMAX(1, ast->sample_size), AV_TIME_BASE}); |
| |
| av_dlog(s, "%"PRId64" %d/%d %"PRId64"\n", ts, |
| st->time_base.num, st->time_base.den, ast->frame_offset); |
| if(ts < best_ts){ |
| best_ts= ts; |
| best_st= st; |
| best_stream_index= i; |
| } |
| } |
| if(!best_st) |
| return AVERROR_EOF; |
| |
| best_ast = best_st->priv_data; |
| best_ts = best_ast->frame_offset; |
| if(best_ast->remaining) |
| i= av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY | AVSEEK_FLAG_BACKWARD); |
| else{ |
| i= av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY); |
| if(i>=0) |
| best_ast->frame_offset= best_st->index_entries[i].timestamp; |
| } |
| |
| if(i>=0){ |
| int64_t pos= best_st->index_entries[i].pos; |
| pos += best_ast->packet_size - best_ast->remaining; |
| if(avio_seek(s->pb, pos + 8, SEEK_SET) < 0) |
| return AVERROR_EOF; |
| |
| av_assert0(best_ast->remaining <= best_ast->packet_size); |
| |
| avi->stream_index= best_stream_index; |
| if(!best_ast->remaining) |
| best_ast->packet_size= |
| best_ast->remaining= best_st->index_entries[i].size; |
| } |
| else |
| return AVERROR_EOF; |
| } |
| |
| resync: |
| if(avi->stream_index >= 0){ |
| AVStream *st= s->streams[ avi->stream_index ]; |
| AVIStream *ast= st->priv_data; |
| int size, err; |
| |
| if(get_subtitle_pkt(s, st, pkt)) |
| return 0; |
| |
| if(ast->sample_size <= 1) // minorityreport.AVI block_align=1024 sample_size=1 IMA-ADPCM |
| size= INT_MAX; |
| else if(ast->sample_size < 32) |
| // arbitrary multiplier to avoid tiny packets for raw PCM data |
| size= 1024*ast->sample_size; |
| else |
| size= ast->sample_size; |
| |
| if(size > ast->remaining) |
| size= ast->remaining; |
| avi->last_pkt_pos= avio_tell(pb); |
| err= av_get_packet(pb, pkt, size); |
| if(err<0) |
| return err; |
| size = err; |
| |
| if(ast->has_pal && pkt->size<(unsigned)INT_MAX/2){ |
| uint8_t *pal; |
| pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE); |
| if(!pal){ |
| av_log(s, AV_LOG_ERROR, "Failed to allocate data for palette\n"); |
| }else{ |
| memcpy(pal, ast->pal, AVPALETTE_SIZE); |
| ast->has_pal = 0; |
| } |
| } |
| |
| if (CONFIG_DV_DEMUXER && avi->dv_demux) { |
| AVBufferRef *avbuf = pkt->buf; |
| #if FF_API_DESTRUCT_PACKET |
| dstr = pkt->destruct; |
| #endif |
| size = avpriv_dv_produce_packet(avi->dv_demux, pkt, |
| pkt->data, pkt->size, pkt->pos); |
| #if FF_API_DESTRUCT_PACKET |
| pkt->destruct = dstr; |
| #endif |
| pkt->buf = avbuf; |
| pkt->flags |= AV_PKT_FLAG_KEY; |
| if (size < 0) |
| av_free_packet(pkt); |
| } else if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE |
| && !st->codec->codec_tag && read_gab2_sub(st, pkt)) { |
| ast->frame_offset++; |
| avi->stream_index = -1; |
| ast->remaining = 0; |
| goto resync; |
| } else { |
| /* XXX: How to handle B-frames in AVI? */ |
| pkt->dts = ast->frame_offset; |
| // pkt->dts += ast->start; |
| if(ast->sample_size) |
| pkt->dts /= ast->sample_size; |
| av_dlog(s, "dts:%"PRId64" offset:%"PRId64" %d/%d smpl_siz:%d base:%d st:%d size:%d\n", |
| pkt->dts, ast->frame_offset, ast->scale, ast->rate, |
| ast->sample_size, AV_TIME_BASE, avi->stream_index, size); |
| pkt->stream_index = avi->stream_index; |
| |
| if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
| AVIndexEntry *e; |
| int index; |
| av_assert0(st->index_entries); |
| |
| index= av_index_search_timestamp(st, ast->frame_offset, 0); |
| e= &st->index_entries[index]; |
| |
| if(index >= 0 && e->timestamp == ast->frame_offset){ |
| if (index == st->nb_index_entries-1){ |
| int key=1; |
| int i; |
| uint32_t state=-1; |
| for(i=0; i<FFMIN(size,256); i++){ |
| if(st->codec->codec_id == AV_CODEC_ID_MPEG4){ |
| if(state == 0x1B6){ |
| key= !(pkt->data[i]&0xC0); |
| break; |
| } |
| }else |
| break; |
| state= (state<<8) + pkt->data[i]; |
| } |
| if(!key) |
| e->flags &= ~AVINDEX_KEYFRAME; |
| } |
| if (e->flags & AVINDEX_KEYFRAME) |
| pkt->flags |= AV_PKT_FLAG_KEY; |
| } |
| } else { |
| pkt->flags |= AV_PKT_FLAG_KEY; |
| } |
| ast->frame_offset += get_duration(ast, pkt->size); |
| } |
| ast->remaining -= err; |
| if(!ast->remaining){ |
| avi->stream_index= -1; |
| ast->packet_size= 0; |
| } |
| |
| if(!avi->non_interleaved && pkt->pos >= 0 && ast->seek_pos > pkt->pos){ |
| av_free_packet(pkt); |
| goto resync; |
| } |
| ast->seek_pos= 0; |
| |
| if(!avi->non_interleaved && st->nb_index_entries>1 && avi->index_loaded>1){ |
| int64_t dts= av_rescale_q(pkt->dts, st->time_base, AV_TIME_BASE_Q); |
| |
| if(avi->dts_max - dts > 2*AV_TIME_BASE){ |
| avi->non_interleaved= 1; |
| av_log(s, AV_LOG_INFO, "Switching to NI mode, due to poor interleaving\n"); |
| }else if(avi->dts_max < dts) |
| avi->dts_max = dts; |
| } |
| |
| return 0; |
| } |
| |
| if ((err = avi_sync(s, 0)) < 0) |
| return err; |
| goto resync; |
| } |
| |
| /* XXX: We make the implicit supposition that the positions are sorted |
| for each stream. */ |
| static int avi_read_idx1(AVFormatContext *s, int size) |
| { |
| AVIContext *avi = s->priv_data; |
| AVIOContext *pb = s->pb; |
| int nb_index_entries, i; |
| AVStream *st; |
| AVIStream *ast; |
| unsigned int index, tag, flags, pos, len, first_packet = 1; |
| unsigned last_pos= -1; |
| unsigned last_idx= -1; |
| int64_t idx1_pos, first_packet_pos = 0, data_offset = 0; |
| int anykey = 0; |
| |
| nb_index_entries = size / 16; |
| if (nb_index_entries <= 0) |
| return AVERROR_INVALIDDATA; |
| |
| idx1_pos = avio_tell(pb); |
| avio_seek(pb, avi->movi_list+4, SEEK_SET); |
| if (avi_sync(s, 1) == 0) { |
| first_packet_pos = avio_tell(pb) - 8; |
| } |
| avi->stream_index = -1; |
| avio_seek(pb, idx1_pos, SEEK_SET); |
| |
| if (s->nb_streams == 1 && s->streams[0]->codec->codec_tag == AV_RL32("MMES")){ |
| first_packet_pos = 0; |
| data_offset = avi->movi_list; |
| } |
| |
| /* Read the entries and sort them in each stream component. */ |
| for(i = 0; i < nb_index_entries; i++) { |
| if(url_feof(pb)) |
| return -1; |
| |
| tag = avio_rl32(pb); |
| flags = avio_rl32(pb); |
| pos = avio_rl32(pb); |
| len = avio_rl32(pb); |
| av_dlog(s, "%d: tag=0x%x flags=0x%x pos=0x%x len=%d/", |
| i, tag, flags, pos, len); |
| |
| index = ((tag & 0xff) - '0') * 10; |
| index += ((tag >> 8) & 0xff) - '0'; |
| if (index >= s->nb_streams) |
| continue; |
| st = s->streams[index]; |
| ast = st->priv_data; |
| |
| if (first_packet && first_packet_pos) { |
| data_offset = first_packet_pos - pos; |
| first_packet = 0; |
| } |
| pos += data_offset; |
| |
| av_dlog(s, "%d cum_len=%"PRId64"\n", len, ast->cum_len); |
| |
| // even if we have only a single stream, we should |
| // switch to non-interleaved to get correct timestamps |
| if(last_pos == pos) |
| avi->non_interleaved= 1; |
| if(last_idx != pos && len) { |
| av_add_index_entry(st, pos, ast->cum_len, len, 0, (flags&AVIIF_INDEX) ? AVINDEX_KEYFRAME : 0); |
| last_idx= pos; |
| } |
| ast->cum_len += get_duration(ast, len); |
| last_pos= pos; |
| anykey |= flags&AVIIF_INDEX; |
| } |
| if (!anykey) { |
| for (index = 0; index < s->nb_streams; index++) { |
| st = s->streams[index]; |
| if (st->nb_index_entries) |
| st->index_entries[0].flags |= AVINDEX_KEYFRAME; |
| } |
| } |
| return 0; |
| } |
| |
| static int guess_ni_flag(AVFormatContext *s){ |
| int i; |
| int64_t last_start=0; |
| int64_t first_end= INT64_MAX; |
| int64_t oldpos= avio_tell(s->pb); |
| int *idx; |
| int64_t min_pos, pos; |
| |
| for(i=0; i<s->nb_streams; i++){ |
| AVStream *st = s->streams[i]; |
| int n= st->nb_index_entries; |
| unsigned int size; |
| |
| if(n <= 0) |
| continue; |
| |
| if(n >= 2){ |
| int64_t pos= st->index_entries[0].pos; |
| avio_seek(s->pb, pos + 4, SEEK_SET); |
| size= avio_rl32(s->pb); |
| if(pos + size > st->index_entries[1].pos) |
| last_start= INT64_MAX; |
| } |
| |
| if(st->index_entries[0].pos > last_start) |
| last_start= st->index_entries[0].pos; |
| if(st->index_entries[n-1].pos < first_end) |
| first_end= st->index_entries[n-1].pos; |
| } |
| avio_seek(s->pb, oldpos, SEEK_SET); |
| if (last_start > first_end) |
| return 1; |
| idx= av_mallocz(sizeof(*idx) * s->nb_streams); |
| for (min_pos=pos=0; min_pos!=INT64_MAX; pos= min_pos+1LU) { |
| int64_t max_dts = INT64_MIN/2, min_dts= INT64_MAX/2; |
| min_pos = INT64_MAX; |
| |
| for (i=0; i<s->nb_streams; i++) { |
| AVStream *st = s->streams[i]; |
| AVIStream *ast = st->priv_data; |
| int n= st->nb_index_entries; |
| while (idx[i]<n && st->index_entries[idx[i]].pos < pos) |
| idx[i]++; |
| if (idx[i] < n) { |
| min_dts = FFMIN(min_dts, av_rescale_q(st->index_entries[idx[i]].timestamp/FFMAX(ast->sample_size, 1), st->time_base, AV_TIME_BASE_Q)); |
| min_pos = FFMIN(min_pos, st->index_entries[idx[i]].pos); |
| } |
| if (idx[i]) |
| max_dts = FFMAX(max_dts, av_rescale_q(st->index_entries[idx[i]-1].timestamp/FFMAX(ast->sample_size, 1), st->time_base, AV_TIME_BASE_Q)); |
| } |
| if(max_dts - min_dts > 2*AV_TIME_BASE) { |
| av_free(idx); |
| return 1; |
| } |
| } |
| av_free(idx); |
| return 0; |
| } |
| |
| static int avi_load_index(AVFormatContext *s) |
| { |
| AVIContext *avi = s->priv_data; |
| AVIOContext *pb = s->pb; |
| uint32_t tag, size; |
| int64_t pos= avio_tell(pb); |
| int64_t next; |
| int ret = -1; |
| |
| if (avio_seek(pb, avi->movi_end, SEEK_SET) < 0) |
| goto the_end; // maybe truncated file |
| av_dlog(s, "movi_end=0x%"PRIx64"\n", avi->movi_end); |
| for(;;) { |
| tag = avio_rl32(pb); |
| size = avio_rl32(pb); |
| if (url_feof(pb)) |
| break; |
| next = avio_tell(pb) + size + (size & 1); |
| |
| av_dlog(s, "tag=%c%c%c%c size=0x%x\n", |
| tag & 0xff, |
| (tag >> 8) & 0xff, |
| (tag >> 16) & 0xff, |
| (tag >> 24) & 0xff, |
| size); |
| |
| if (tag == MKTAG('i', 'd', 'x', '1') && |
| avi_read_idx1(s, size) >= 0) { |
| avi->index_loaded=2; |
| ret = 0; |
| }else if(tag == MKTAG('L', 'I', 'S', 'T')) { |
| uint32_t tag1 = avio_rl32(pb); |
| |
| if (tag1 == MKTAG('I', 'N', 'F', 'O')) |
| ff_read_riff_info(s, size - 4); |
| }else if(!ret) |
| break; |
| |
| if (avio_seek(pb, next, SEEK_SET) < 0) |
| break; // something is wrong here |
| } |
| the_end: |
| avio_seek(pb, pos, SEEK_SET); |
| return ret; |
| } |
| |
| static void seek_subtitle(AVStream *st, AVStream *st2, int64_t timestamp) |
| { |
| AVIStream *ast2 = st2->priv_data; |
| int64_t ts2 = av_rescale_q(timestamp, st->time_base, st2->time_base); |
| av_free_packet(&ast2->sub_pkt); |
| if (avformat_seek_file(ast2->sub_ctx, 0, INT64_MIN, ts2, ts2, 0) >= 0 || |
| avformat_seek_file(ast2->sub_ctx, 0, ts2, ts2, INT64_MAX, 0) >= 0) |
| ff_read_packet(ast2->sub_ctx, &ast2->sub_pkt); |
| } |
| |
| static int avi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) |
| { |
| AVIContext *avi = s->priv_data; |
| AVStream *st; |
| int i, index; |
| int64_t pos, pos_min; |
| AVIStream *ast; |
| |
| if (!avi->index_loaded) { |
| /* we only load the index on demand */ |
| avi_load_index(s); |
| avi->index_loaded |= 1; |
| } |
| av_assert0(stream_index>= 0); |
| |
| st = s->streams[stream_index]; |
| ast= st->priv_data; |
| index= av_index_search_timestamp(st, timestamp * FFMAX(ast->sample_size, 1), flags); |
| if (index<0) { |
| if (st->nb_index_entries > 0) |
| av_log(s, AV_LOG_DEBUG, "Failed to find timestamp %"PRId64 " in index %"PRId64 " .. %"PRId64 "\n", |
| timestamp * FFMAX(ast->sample_size, 1), |
| st->index_entries[0].timestamp, |
| st->index_entries[st->nb_index_entries - 1].timestamp); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| /* find the position */ |
| pos = st->index_entries[index].pos; |
| timestamp = st->index_entries[index].timestamp / FFMAX(ast->sample_size, 1); |
| |
| av_dlog(s, "XX %"PRId64" %d %"PRId64"\n", |
| timestamp, index, st->index_entries[index].timestamp); |
| |
| if (CONFIG_DV_DEMUXER && avi->dv_demux) { |
| /* One and only one real stream for DV in AVI, and it has video */ |
| /* offsets. Calling with other stream indexes should have failed */ |
| /* the av_index_search_timestamp call above. */ |
| av_assert0(stream_index == 0); |
| |
| if(avio_seek(s->pb, pos, SEEK_SET) < 0) |
| return -1; |
| |
| /* Feed the DV video stream version of the timestamp to the */ |
| /* DV demux so it can synthesize correct timestamps. */ |
| ff_dv_offset_reset(avi->dv_demux, timestamp); |
| |
| avi->stream_index= -1; |
| return 0; |
| } |
| |
| pos_min= pos; |
| for(i = 0; i < s->nb_streams; i++) { |
| AVStream *st2 = s->streams[i]; |
| AVIStream *ast2 = st2->priv_data; |
| |
| ast2->packet_size= |
| ast2->remaining= 0; |
| |
| if (ast2->sub_ctx) { |
| seek_subtitle(st, st2, timestamp); |
| continue; |
| } |
| |
| if (st2->nb_index_entries <= 0) |
| continue; |
| |
| // av_assert1(st2->codec->block_align); |
| av_assert0((int64_t)st2->time_base.num*ast2->rate == (int64_t)st2->time_base.den*ast2->scale); |
| index = av_index_search_timestamp( |
| st2, |
| av_rescale_q(timestamp, st->time_base, st2->time_base) * FFMAX(ast2->sample_size, 1), |
| flags | AVSEEK_FLAG_BACKWARD | (st2->codec->codec_type != AVMEDIA_TYPE_VIDEO ? AVSEEK_FLAG_ANY : 0)); |
| if(index<0) |
| index=0; |
| ast2->seek_pos= st2->index_entries[index].pos; |
| pos_min= FFMIN(pos_min,ast2->seek_pos); |
| } |
| for(i = 0; i < s->nb_streams; i++) { |
| AVStream *st2 = s->streams[i]; |
| AVIStream *ast2 = st2->priv_data; |
| |
| if (ast2->sub_ctx || st2->nb_index_entries <= 0) |
| continue; |
| |
| index = av_index_search_timestamp( |
| st2, |
| av_rescale_q(timestamp, st->time_base, st2->time_base) * FFMAX(ast2->sample_size, 1), |
| flags | AVSEEK_FLAG_BACKWARD | (st2->codec->codec_type != AVMEDIA_TYPE_VIDEO ? AVSEEK_FLAG_ANY : 0)); |
| if(index<0) |
| index=0; |
| while(!avi->non_interleaved && index>0 && st2->index_entries[index-1].pos >= pos_min) |
| index--; |
| ast2->frame_offset = st2->index_entries[index].timestamp; |
| } |
| |
| /* do the seek */ |
| if (avio_seek(s->pb, pos_min, SEEK_SET) < 0) { |
| av_log(s, AV_LOG_ERROR, "Seek failed\n"); |
| return -1; |
| } |
| avi->stream_index= -1; |
| avi->dts_max= INT_MIN; |
| return 0; |
| } |
| |
| static int avi_read_close(AVFormatContext *s) |
| { |
| int i; |
| AVIContext *avi = s->priv_data; |
| |
| for(i=0;i<s->nb_streams;i++) { |
| AVStream *st = s->streams[i]; |
| AVIStream *ast = st->priv_data; |
| if (ast) { |
| if (ast->sub_ctx) { |
| av_freep(&ast->sub_ctx->pb); |
| avformat_close_input(&ast->sub_ctx); |
| } |
| av_free(ast->sub_buffer); |
| av_free_packet(&ast->sub_pkt); |
| } |
| } |
| |
| av_free(avi->dv_demux); |
| |
| return 0; |
| } |
| |
| static int avi_probe(AVProbeData *p) |
| { |
| int i; |
| |
| /* check file header */ |
| for(i=0; avi_headers[i][0]; i++) |
| if(!memcmp(p->buf , avi_headers[i] , 4) && |
| !memcmp(p->buf+8, avi_headers[i]+4, 4)) |
| return AVPROBE_SCORE_MAX; |
| |
| return 0; |
| } |
| |
| AVInputFormat ff_avi_demuxer = { |
| .name = "avi", |
| .long_name = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"), |
| .priv_data_size = sizeof(AVIContext), |
| .read_probe = avi_probe, |
| .read_header = avi_read_header, |
| .read_packet = avi_read_packet, |
| .read_close = avi_read_close, |
| .read_seek = avi_read_seek, |
| .priv_class = &demuxer_class, |
| }; |