| /* |
| * MPEG-DASH ISO BMFF segmenter |
| * Copyright (c) 2014 Martin Storsjo |
| * Copyright (c) 2018 Akamai Technologies, Inc. |
| * |
| * 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 "config.h" |
| #if HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif |
| |
| #include "libavutil/avassert.h" |
| #include "libavutil/avutil.h" |
| #include "libavutil/avstring.h" |
| #include "libavutil/intreadwrite.h" |
| #include "libavutil/mathematics.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/rational.h" |
| #include "libavutil/time_internal.h" |
| |
| #include "avc.h" |
| #include "avformat.h" |
| #include "avio_internal.h" |
| #include "hlsplaylist.h" |
| #if CONFIG_HTTP_PROTOCOL |
| #include "http.h" |
| #endif |
| #include "internal.h" |
| #include "isom.h" |
| #include "os_support.h" |
| #include "url.h" |
| #include "vpcc.h" |
| #include "dash.h" |
| |
| typedef enum { |
| SEGMENT_TYPE_MP4 = 0, |
| SEGMENT_TYPE_WEBM, |
| SEGMENT_TYPE_NB |
| } SegmentType; |
| |
| typedef struct Segment { |
| char file[1024]; |
| int64_t start_pos; |
| int range_length, index_length; |
| int64_t time; |
| int duration; |
| int n; |
| } Segment; |
| |
| typedef struct AdaptationSet { |
| char id[10]; |
| enum AVMediaType media_type; |
| AVDictionary *metadata; |
| AVRational min_frame_rate, max_frame_rate; |
| int ambiguous_frame_rate; |
| } AdaptationSet; |
| |
| typedef struct OutputStream { |
| AVFormatContext *ctx; |
| int ctx_inited, as_idx; |
| AVIOContext *out; |
| int packets_written; |
| char initfile[1024]; |
| int64_t init_start_pos, pos; |
| int init_range_length; |
| int nb_segments, segments_size, segment_index; |
| Segment **segments; |
| int64_t first_pts, start_pts, max_pts; |
| int64_t last_dts, last_pts; |
| int bit_rate; |
| |
| char codec_str[100]; |
| int written_len; |
| char filename[1024]; |
| char full_path[1024]; |
| char temp_path[1024]; |
| double availability_time_offset; |
| int total_pkt_size; |
| int muxer_overhead; |
| } OutputStream; |
| |
| typedef struct DASHContext { |
| const AVClass *class; /* Class for private options. */ |
| char *adaptation_sets; |
| AdaptationSet *as; |
| int nb_as; |
| int window_size; |
| int extra_window_size; |
| #if FF_API_DASH_MIN_SEG_DURATION |
| int min_seg_duration; |
| #endif |
| int64_t seg_duration; |
| int remove_at_exit; |
| int use_template; |
| int use_timeline; |
| int single_file; |
| OutputStream *streams; |
| int has_video; |
| int64_t last_duration; |
| int64_t total_duration; |
| char availability_start_time[100]; |
| char dirname[1024]; |
| const char *single_file_name; |
| const char *init_seg_name; |
| const char *media_seg_name; |
| const char *utc_timing_url; |
| const char *method; |
| const char *user_agent; |
| int hls_playlist; |
| int http_persistent; |
| int master_playlist_created; |
| AVIOContext *mpd_out; |
| AVIOContext *m3u8_out; |
| int streaming; |
| int64_t timeout; |
| int index_correction; |
| char *format_options_str; |
| SegmentType segment_type; |
| const char *format_name; |
| } DASHContext; |
| |
| static struct codec_string { |
| int id; |
| const char *str; |
| } codecs[] = { |
| { AV_CODEC_ID_VP8, "vp8" }, |
| { AV_CODEC_ID_VP9, "vp9" }, |
| { AV_CODEC_ID_VORBIS, "vorbis" }, |
| { AV_CODEC_ID_OPUS, "opus" }, |
| { 0, NULL } |
| }; |
| |
| static struct format_string { |
| SegmentType segment_type; |
| const char *str; |
| } formats[] = { |
| { SEGMENT_TYPE_MP4, "mp4" }, |
| { SEGMENT_TYPE_WEBM, "webm" }, |
| { 0, NULL } |
| }; |
| |
| static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename, |
| AVDictionary **options) { |
| DASHContext *c = s->priv_data; |
| int http_base_proto = filename ? ff_is_http_proto(filename) : 0; |
| int err = AVERROR_MUXER_NOT_FOUND; |
| if (!*pb || !http_base_proto || !c->http_persistent) { |
| err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options); |
| #if CONFIG_HTTP_PROTOCOL |
| } else { |
| URLContext *http_url_context = ffio_geturlcontext(*pb); |
| av_assert0(http_url_context); |
| err = ff_http_do_new_request(http_url_context, filename); |
| #endif |
| } |
| return err; |
| } |
| |
| static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) { |
| DASHContext *c = s->priv_data; |
| int http_base_proto = filename ? ff_is_http_proto(filename) : 0; |
| |
| if (!http_base_proto || !c->http_persistent) { |
| ff_format_io_close(s, pb); |
| #if CONFIG_HTTP_PROTOCOL |
| } else { |
| URLContext *http_url_context = ffio_geturlcontext(*pb); |
| av_assert0(http_url_context); |
| avio_flush(*pb); |
| ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE); |
| #endif |
| } |
| } |
| |
| static const char *get_format_str(SegmentType segment_type) { |
| int i; |
| for (i = 0; i < SEGMENT_TYPE_NB; i++) |
| if (formats[i].segment_type == segment_type) |
| return formats[i].str; |
| return NULL; |
| } |
| |
| static int check_file_extension(const char *filename, const char *extension) { |
| char *dot; |
| if (!filename || !extension) |
| return -1; |
| dot = strrchr(filename, '.'); |
| if (dot && !strcmp(dot + 1, extension)) |
| return 0; |
| return -1; |
| } |
| |
| static void set_vp9_codec_str(AVFormatContext *s, AVCodecParameters *par, |
| AVRational *frame_rate, char *str, int size) { |
| VPCC vpcc; |
| int ret = ff_isom_get_vpcc_features(s, par, frame_rate, &vpcc); |
| if (ret == 0) { |
| av_strlcatf(str, size, "vp09.%02d.%02d.%02d", |
| vpcc.profile, vpcc.level, vpcc.bitdepth); |
| } else { |
| // Default to just vp9 in case of error while finding out profile or level |
| av_log(s, AV_LOG_WARNING, "Could not find VP9 profile and/or level\n"); |
| av_strlcpy(str, "vp9", size); |
| } |
| return; |
| } |
| |
| static void set_codec_str(AVFormatContext *s, AVCodecParameters *par, |
| AVRational *frame_rate, char *str, int size) |
| { |
| const AVCodecTag *tags[2] = { NULL, NULL }; |
| uint32_t tag; |
| int i; |
| |
| // common Webm codecs are not part of RFC 6381 |
| for (i = 0; codecs[i].id; i++) |
| if (codecs[i].id == par->codec_id) { |
| if (codecs[i].id == AV_CODEC_ID_VP9) { |
| set_vp9_codec_str(s, par, frame_rate, str, size); |
| } else { |
| av_strlcpy(str, codecs[i].str, size); |
| } |
| return; |
| } |
| |
| // for codecs part of RFC 6381 |
| if (par->codec_type == AVMEDIA_TYPE_VIDEO) |
| tags[0] = ff_codec_movvideo_tags; |
| else if (par->codec_type == AVMEDIA_TYPE_AUDIO) |
| tags[0] = ff_codec_movaudio_tags; |
| else |
| return; |
| |
| tag = av_codec_get_tag(tags, par->codec_id); |
| if (!tag) |
| return; |
| if (size < 5) |
| return; |
| |
| AV_WL32(str, tag); |
| str[4] = '\0'; |
| if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) { |
| uint32_t oti; |
| tags[0] = ff_mp4_obj_type; |
| oti = av_codec_get_tag(tags, par->codec_id); |
| if (oti) |
| av_strlcatf(str, size, ".%02"PRIx32, oti); |
| else |
| return; |
| |
| if (tag == MKTAG('m', 'p', '4', 'a')) { |
| if (par->extradata_size >= 2) { |
| int aot = par->extradata[0] >> 3; |
| if (aot == 31) |
| aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32; |
| av_strlcatf(str, size, ".%d", aot); |
| } |
| } else if (tag == MKTAG('m', 'p', '4', 'v')) { |
| // Unimplemented, should output ProfileLevelIndication as a decimal number |
| av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n"); |
| } |
| } else if (!strcmp(str, "avc1")) { |
| uint8_t *tmpbuf = NULL; |
| uint8_t *extradata = par->extradata; |
| int extradata_size = par->extradata_size; |
| if (!extradata_size) |
| return; |
| if (extradata[0] != 1) { |
| AVIOContext *pb; |
| if (avio_open_dyn_buf(&pb) < 0) |
| return; |
| if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) { |
| ffio_free_dyn_buf(&pb); |
| return; |
| } |
| extradata_size = avio_close_dyn_buf(pb, &extradata); |
| tmpbuf = extradata; |
| } |
| |
| if (extradata_size >= 4) |
| av_strlcatf(str, size, ".%02x%02x%02x", |
| extradata[1], extradata[2], extradata[3]); |
| av_free(tmpbuf); |
| } |
| } |
| |
| static int flush_dynbuf(OutputStream *os, int *range_length) |
| { |
| uint8_t *buffer; |
| |
| if (!os->ctx->pb) { |
| return AVERROR(EINVAL); |
| } |
| |
| // flush |
| av_write_frame(os->ctx, NULL); |
| avio_flush(os->ctx->pb); |
| |
| // write out to file |
| *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer); |
| os->ctx->pb = NULL; |
| avio_write(os->out, buffer + os->written_len, *range_length - os->written_len); |
| os->written_len = 0; |
| av_free(buffer); |
| |
| // re-open buffer |
| return avio_open_dyn_buf(&os->ctx->pb); |
| } |
| |
| static void set_http_options(AVDictionary **options, DASHContext *c) |
| { |
| if (c->method) |
| av_dict_set(options, "method", c->method, 0); |
| if (c->user_agent) |
| av_dict_set(options, "user_agent", c->user_agent, 0); |
| if (c->http_persistent) |
| av_dict_set_int(options, "multiple_requests", 1, 0); |
| if (c->timeout >= 0) |
| av_dict_set_int(options, "timeout", c->timeout, 0); |
| } |
| |
| static void get_hls_playlist_name(char *playlist_name, int string_size, |
| const char *base_url, int id) { |
| if (base_url) |
| snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id); |
| else |
| snprintf(playlist_name, string_size, "media_%d.m3u8", id); |
| } |
| |
| static int flush_init_segment(AVFormatContext *s, OutputStream *os) |
| { |
| DASHContext *c = s->priv_data; |
| int ret, range_length; |
| |
| ret = flush_dynbuf(os, &range_length); |
| if (ret < 0) |
| return ret; |
| |
| os->pos = os->init_range_length = range_length; |
| if (!c->single_file) |
| ff_format_io_close(s, &os->out); |
| return 0; |
| } |
| |
| static void dash_free(AVFormatContext *s) |
| { |
| DASHContext *c = s->priv_data; |
| int i, j; |
| |
| if (c->as) { |
| for (i = 0; i < c->nb_as; i++) |
| av_dict_free(&c->as[i].metadata); |
| av_freep(&c->as); |
| c->nb_as = 0; |
| } |
| |
| if (!c->streams) |
| return; |
| for (i = 0; i < s->nb_streams; i++) { |
| OutputStream *os = &c->streams[i]; |
| if (os->ctx && os->ctx_inited) |
| av_write_trailer(os->ctx); |
| if (os->ctx && os->ctx->pb) |
| ffio_free_dyn_buf(&os->ctx->pb); |
| ff_format_io_close(s, &os->out); |
| if (os->ctx) |
| avformat_free_context(os->ctx); |
| for (j = 0; j < os->nb_segments; j++) |
| av_free(os->segments[j]); |
| av_free(os->segments); |
| } |
| av_freep(&c->streams); |
| |
| ff_format_io_close(s, &c->mpd_out); |
| ff_format_io_close(s, &c->m3u8_out); |
| } |
| |
| static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s, |
| int representation_id, int final) |
| { |
| DASHContext *c = s->priv_data; |
| int i, start_index = 0, start_number = 1; |
| if (c->window_size) { |
| start_index = FFMAX(os->nb_segments - c->window_size, 0); |
| start_number = FFMAX(os->segment_index - c->window_size, 1); |
| } |
| |
| if (c->use_template) { |
| int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE; |
| avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale); |
| if (!c->use_timeline) { |
| avio_printf(out, "duration=\"%"PRId64"\" ", c->seg_duration); |
| if (c->streaming && os->availability_time_offset) |
| avio_printf(out, "availabilityTimeOffset=\"%.3f\" ", |
| os->availability_time_offset); |
| } |
| avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\">\n", c->init_seg_name, c->media_seg_name, c->use_timeline ? start_number : 1); |
| if (c->use_timeline) { |
| int64_t cur_time = 0; |
| avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n"); |
| for (i = start_index; i < os->nb_segments; ) { |
| Segment *seg = os->segments[i]; |
| int repeat = 0; |
| avio_printf(out, "\t\t\t\t\t\t<S "); |
| if (i == start_index || seg->time != cur_time) { |
| cur_time = seg->time; |
| avio_printf(out, "t=\"%"PRId64"\" ", seg->time); |
| } |
| avio_printf(out, "d=\"%d\" ", seg->duration); |
| while (i + repeat + 1 < os->nb_segments && |
| os->segments[i + repeat + 1]->duration == seg->duration && |
| os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration) |
| repeat++; |
| if (repeat > 0) |
| avio_printf(out, "r=\"%d\" ", repeat); |
| avio_printf(out, "/>\n"); |
| i += 1 + repeat; |
| cur_time += (1 + repeat) * seg->duration; |
| } |
| avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n"); |
| } |
| avio_printf(out, "\t\t\t\t</SegmentTemplate>\n"); |
| } else if (c->single_file) { |
| avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile); |
| avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number); |
| avio_printf(out, "\t\t\t\t\t<Initialization range=\"%"PRId64"-%"PRId64"\" />\n", os->init_start_pos, os->init_start_pos + os->init_range_length - 1); |
| for (i = start_index; i < os->nb_segments; i++) { |
| Segment *seg = os->segments[i]; |
| avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1); |
| if (seg->index_length) |
| avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1); |
| avio_printf(out, "/>\n"); |
| } |
| avio_printf(out, "\t\t\t\t</SegmentList>\n"); |
| } else { |
| avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number); |
| avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile); |
| for (i = start_index; i < os->nb_segments; i++) { |
| Segment *seg = os->segments[i]; |
| avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file); |
| } |
| avio_printf(out, "\t\t\t\t</SegmentList>\n"); |
| } |
| if (c->hls_playlist && start_index < os->nb_segments) |
| { |
| int timescale = os->ctx->streams[0]->time_base.den; |
| char temp_filename_hls[1024]; |
| char filename_hls[1024]; |
| AVDictionary *http_opts = NULL; |
| int target_duration = 0; |
| int ret = 0; |
| const char *proto = avio_find_protocol_name(c->dirname); |
| int use_rename = proto && !strcmp(proto, "file"); |
| |
| get_hls_playlist_name(filename_hls, sizeof(filename_hls), |
| c->dirname, representation_id); |
| |
| snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls); |
| |
| set_http_options(&http_opts, c); |
| dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts); |
| av_dict_free(&http_opts); |
| for (i = start_index; i < os->nb_segments; i++) { |
| Segment *seg = os->segments[i]; |
| double duration = (double) seg->duration / timescale; |
| if (target_duration <= duration) |
| target_duration = lrint(duration); |
| } |
| |
| ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration, |
| start_number, PLAYLIST_TYPE_NONE); |
| |
| ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file, |
| os->init_range_length, os->init_start_pos); |
| |
| for (i = start_index; i < os->nb_segments; i++) { |
| Segment *seg = os->segments[i]; |
| ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file, |
| (double) seg->duration / timescale, 0, |
| seg->range_length, seg->start_pos, NULL, |
| c->single_file ? os->initfile : seg->file, |
| NULL); |
| if (ret < 0) { |
| av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n"); |
| } |
| } |
| |
| if (final) |
| ff_hls_write_end_list(c->m3u8_out); |
| |
| dashenc_io_close(s, &c->m3u8_out, temp_filename_hls); |
| |
| if (use_rename) |
| if (avpriv_io_move(temp_filename_hls, filename_hls) < 0) { |
| av_log(os->ctx, AV_LOG_WARNING, "renaming file %s to %s failed\n\n", temp_filename_hls, filename_hls); |
| } |
| } |
| |
| } |
| |
| static char *xmlescape(const char *str) { |
| int outlen = strlen(str)*3/2 + 6; |
| char *out = av_realloc(NULL, outlen + 1); |
| int pos = 0; |
| if (!out) |
| return NULL; |
| for (; *str; str++) { |
| if (pos + 6 > outlen) { |
| char *tmp; |
| outlen = 2 * outlen + 6; |
| tmp = av_realloc(out, outlen + 1); |
| if (!tmp) { |
| av_free(out); |
| return NULL; |
| } |
| out = tmp; |
| } |
| if (*str == '&') { |
| memcpy(&out[pos], "&", 5); |
| pos += 5; |
| } else if (*str == '<') { |
| memcpy(&out[pos], "<", 4); |
| pos += 4; |
| } else if (*str == '>') { |
| memcpy(&out[pos], ">", 4); |
| pos += 4; |
| } else if (*str == '\'') { |
| memcpy(&out[pos], "'", 6); |
| pos += 6; |
| } else if (*str == '\"') { |
| memcpy(&out[pos], """, 6); |
| pos += 6; |
| } else { |
| out[pos++] = *str; |
| } |
| } |
| out[pos] = '\0'; |
| return out; |
| } |
| |
| static void write_time(AVIOContext *out, int64_t time) |
| { |
| int seconds = time / AV_TIME_BASE; |
| int fractions = time % AV_TIME_BASE; |
| int minutes = seconds / 60; |
| int hours = minutes / 60; |
| seconds %= 60; |
| minutes %= 60; |
| avio_printf(out, "PT"); |
| if (hours) |
| avio_printf(out, "%dH", hours); |
| if (hours || minutes) |
| avio_printf(out, "%dM", minutes); |
| avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10)); |
| } |
| |
| static void format_date_now(char *buf, int size) |
| { |
| time_t t = time(NULL); |
| struct tm *ptm, tmbuf; |
| ptm = gmtime_r(&t, &tmbuf); |
| if (ptm) { |
| if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%SZ", ptm)) |
| buf[0] = '\0'; |
| } |
| } |
| |
| static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index, |
| int final) |
| { |
| DASHContext *c = s->priv_data; |
| AdaptationSet *as = &c->as[as_index]; |
| AVDictionaryEntry *lang, *role; |
| int i; |
| |
| avio_printf(out, "\t\t<AdaptationSet id=\"%s\" contentType=\"%s\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"", |
| as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio"); |
| if (as->media_type == AVMEDIA_TYPE_VIDEO && as->max_frame_rate.num && !as->ambiguous_frame_rate && av_cmp_q(as->min_frame_rate, as->max_frame_rate) < 0) |
| avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den); |
| lang = av_dict_get(as->metadata, "language", NULL, 0); |
| if (lang) |
| avio_printf(out, " lang=\"%s\"", lang->value); |
| avio_printf(out, ">\n"); |
| |
| role = av_dict_get(as->metadata, "role", NULL, 0); |
| if (role) |
| avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value); |
| |
| for (i = 0; i < s->nb_streams; i++) { |
| OutputStream *os = &c->streams[i]; |
| char bandwidth_str[64] = {'\0'}; |
| |
| if (os->as_idx - 1 != as_index) |
| continue; |
| |
| if (os->bit_rate > 0) |
| snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"", |
| os->bit_rate); |
| |
| if (as->media_type == AVMEDIA_TYPE_VIDEO) { |
| AVStream *st = s->streams[i]; |
| avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"", |
| i, c->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height); |
| if (st->avg_frame_rate.num) |
| avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den); |
| avio_printf(out, ">\n"); |
| } else { |
| avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n", |
| i, c->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate); |
| avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n", |
| s->streams[i]->codecpar->channels); |
| } |
| output_segment_list(os, out, s, i, final); |
| avio_printf(out, "\t\t\t</Representation>\n"); |
| } |
| avio_printf(out, "\t\t</AdaptationSet>\n"); |
| |
| return 0; |
| } |
| |
| static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type) |
| { |
| DASHContext *c = s->priv_data; |
| |
| void *mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1)); |
| if (!mem) |
| return AVERROR(ENOMEM); |
| c->as = mem; |
| ++c->nb_as; |
| |
| *as = &c->as[c->nb_as - 1]; |
| memset(*as, 0, sizeof(**as)); |
| (*as)->media_type = type; |
| |
| return 0; |
| } |
| |
| static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i) |
| { |
| DASHContext *c = s->priv_data; |
| AdaptationSet *as = &c->as[as_idx - 1]; |
| OutputStream *os = &c->streams[i]; |
| |
| if (as->media_type != s->streams[i]->codecpar->codec_type) { |
| av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i); |
| return AVERROR(EINVAL); |
| } else if (os->as_idx) { |
| av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i); |
| return AVERROR(EINVAL); |
| } |
| os->as_idx = as_idx; |
| |
| return 0; |
| } |
| |
| static int parse_adaptation_sets(AVFormatContext *s) |
| { |
| DASHContext *c = s->priv_data; |
| const char *p = c->adaptation_sets; |
| enum { new_set, parse_id, parsing_streams } state; |
| AdaptationSet *as; |
| int i, n, ret; |
| |
| // default: one AdaptationSet for each stream |
| if (!p) { |
| for (i = 0; i < s->nb_streams; i++) { |
| if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0) |
| return ret; |
| snprintf(as->id, sizeof(as->id), "%d", i); |
| |
| c->streams[i].as_idx = c->nb_as; |
| } |
| goto end; |
| } |
| |
| // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on |
| state = new_set; |
| while (*p) { |
| if (*p == ' ') { |
| p++; |
| continue; |
| } else if (state == new_set && av_strstart(p, "id=", &p)) { |
| |
| if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0) |
| return ret; |
| |
| n = strcspn(p, ","); |
| snprintf(as->id, sizeof(as->id), "%.*s", n, p); |
| |
| p += n; |
| if (*p) |
| p++; |
| state = parse_id; |
| } else if (state == parse_id && av_strstart(p, "streams=", &p)) { |
| state = parsing_streams; |
| } else if (state == parsing_streams) { |
| AdaptationSet *as = &c->as[c->nb_as - 1]; |
| char idx_str[8], *end_str; |
| |
| n = strcspn(p, " ,"); |
| snprintf(idx_str, sizeof(idx_str), "%.*s", n, p); |
| p += n; |
| |
| // if value is "a" or "v", map all streams of that type |
| if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) { |
| enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO; |
| av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str); |
| |
| for (i = 0; i < s->nb_streams; i++) { |
| if (s->streams[i]->codecpar->codec_type != type) |
| continue; |
| |
| as->media_type = s->streams[i]->codecpar->codec_type; |
| |
| if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0) |
| return ret; |
| } |
| } else { // select single stream |
| i = strtol(idx_str, &end_str, 10); |
| if (idx_str == end_str || i < 0 || i >= s->nb_streams) { |
| av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str); |
| return AVERROR(EINVAL); |
| } |
| av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i); |
| |
| if (as->media_type == AVMEDIA_TYPE_UNKNOWN) { |
| as->media_type = s->streams[i]->codecpar->codec_type; |
| } |
| |
| if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0) |
| return ret; |
| } |
| |
| if (*p == ' ') |
| state = new_set; |
| if (*p) |
| p++; |
| } else { |
| return AVERROR(EINVAL); |
| } |
| } |
| |
| end: |
| // check for unassigned streams |
| for (i = 0; i < s->nb_streams; i++) { |
| OutputStream *os = &c->streams[i]; |
| if (!os->as_idx) { |
| av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i); |
| return AVERROR(EINVAL); |
| } |
| } |
| return 0; |
| } |
| |
| static int write_manifest(AVFormatContext *s, int final) |
| { |
| DASHContext *c = s->priv_data; |
| AVIOContext *out; |
| char temp_filename[1024]; |
| int ret, i; |
| const char *proto = avio_find_protocol_name(s->url); |
| int use_rename = proto && !strcmp(proto, "file"); |
| static unsigned int warned_non_file = 0; |
| AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0); |
| AVDictionary *opts = NULL; |
| |
| if (!use_rename && !warned_non_file++) |
| av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n"); |
| |
| snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url); |
| set_http_options(&opts, c); |
| ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts); |
| if (ret < 0) { |
| av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename); |
| return ret; |
| } |
| out = c->mpd_out; |
| av_dict_free(&opts); |
| avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"); |
| avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n" |
| "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n" |
| "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n" |
| "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n" |
| "\tprofiles=\"urn:mpeg:dash:profile:isoff-live:2011\"\n" |
| "\ttype=\"%s\"\n", final ? "static" : "dynamic"); |
| if (final) { |
| avio_printf(out, "\tmediaPresentationDuration=\""); |
| write_time(out, c->total_duration); |
| avio_printf(out, "\"\n"); |
| } else { |
| int64_t update_period = c->last_duration / AV_TIME_BASE; |
| char now_str[100]; |
| if (c->use_template && !c->use_timeline) |
| update_period = 500; |
| avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period); |
| avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE); |
| if (c->availability_start_time[0]) |
| avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time); |
| format_date_now(now_str, sizeof(now_str)); |
| if (now_str[0]) |
| avio_printf(out, "\tpublishTime=\"%s\"\n", now_str); |
| if (c->window_size && c->use_template) { |
| avio_printf(out, "\ttimeShiftBufferDepth=\""); |
| write_time(out, c->last_duration * c->window_size); |
| avio_printf(out, "\"\n"); |
| } |
| } |
| avio_printf(out, "\tminBufferTime=\""); |
| write_time(out, c->last_duration * 2); |
| avio_printf(out, "\">\n"); |
| avio_printf(out, "\t<ProgramInformation>\n"); |
| if (title) { |
| char *escaped = xmlescape(title->value); |
| avio_printf(out, "\t\t<Title>%s</Title>\n", escaped); |
| av_free(escaped); |
| } |
| avio_printf(out, "\t</ProgramInformation>\n"); |
| |
| if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) { |
| OutputStream *os = &c->streams[0]; |
| int start_index = FFMAX(os->nb_segments - c->window_size, 0); |
| int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q); |
| avio_printf(out, "\t<Period id=\"0\" start=\""); |
| write_time(out, start_time); |
| avio_printf(out, "\">\n"); |
| } else { |
| avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n"); |
| } |
| |
| for (i = 0; i < c->nb_as; i++) { |
| if ((ret = write_adaptation_set(s, out, i, final)) < 0) |
| return ret; |
| } |
| avio_printf(out, "\t</Period>\n"); |
| |
| if (c->utc_timing_url) |
| avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url); |
| |
| avio_printf(out, "</MPD>\n"); |
| avio_flush(out); |
| dashenc_io_close(s, &c->mpd_out, temp_filename); |
| |
| if (use_rename) { |
| if ((ret = avpriv_io_move(temp_filename, s->url)) < 0) |
| return ret; |
| } |
| |
| if (c->hls_playlist && !c->master_playlist_created) { |
| char filename_hls[1024]; |
| const char *audio_group = "A1"; |
| char audio_codec_str[128] = "\0"; |
| int is_default = 1; |
| int max_audio_bitrate = 0; |
| |
| if (*c->dirname) |
| snprintf(filename_hls, sizeof(filename_hls), "%smaster.m3u8", c->dirname); |
| else |
| snprintf(filename_hls, sizeof(filename_hls), "master.m3u8"); |
| |
| snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls); |
| |
| set_http_options(&opts, c); |
| ret = avio_open2(&out, temp_filename, AVIO_FLAG_WRITE, NULL, &opts); |
| if (ret < 0) { |
| av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename); |
| return ret; |
| } |
| av_dict_free(&opts); |
| |
| ff_hls_write_playlist_version(out, 7); |
| |
| for (i = 0; i < s->nb_streams; i++) { |
| char playlist_file[64]; |
| AVStream *st = s->streams[i]; |
| OutputStream *os = &c->streams[i]; |
| if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO) |
| continue; |
| get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i); |
| ff_hls_write_audio_rendition(out, (char *)audio_group, |
| playlist_file, i, is_default); |
| max_audio_bitrate = FFMAX(st->codecpar->bit_rate + |
| os->muxer_overhead, max_audio_bitrate); |
| if (!av_strnstr(audio_codec_str, os->codec_str, sizeof(audio_codec_str))) { |
| if (strlen(audio_codec_str)) |
| av_strlcat(audio_codec_str, ",", sizeof(audio_codec_str)); |
| av_strlcat(audio_codec_str, os->codec_str, sizeof(audio_codec_str)); |
| } |
| is_default = 0; |
| } |
| |
| for (i = 0; i < s->nb_streams; i++) { |
| char playlist_file[64]; |
| char codec_str[128]; |
| AVStream *st = s->streams[i]; |
| OutputStream *os = &c->streams[i]; |
| char *agroup = NULL; |
| int stream_bitrate = st->codecpar->bit_rate + os->muxer_overhead; |
| if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO) |
| continue; |
| av_strlcpy(codec_str, os->codec_str, sizeof(codec_str)); |
| if (max_audio_bitrate) { |
| agroup = (char *)audio_group; |
| stream_bitrate += max_audio_bitrate; |
| av_strlcat(codec_str, ",", sizeof(codec_str)); |
| av_strlcat(codec_str, audio_codec_str, sizeof(codec_str)); |
| } |
| get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i); |
| ff_hls_write_stream_info(st, out, stream_bitrate, playlist_file, agroup, |
| codec_str, NULL); |
| } |
| avio_close(out); |
| if (use_rename) |
| if ((ret = avpriv_io_move(temp_filename, filename_hls)) < 0) |
| return ret; |
| c->master_playlist_created = 1; |
| } |
| |
| return 0; |
| } |
| |
| static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key) |
| { |
| AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0); |
| if (entry) |
| av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE); |
| return 0; |
| } |
| |
| static int dash_init(AVFormatContext *s) |
| { |
| DASHContext *c = s->priv_data; |
| int ret = 0, i; |
| char *ptr; |
| char basename[1024]; |
| |
| if (c->single_file_name) |
| c->single_file = 1; |
| if (c->single_file) |
| c->use_template = 0; |
| |
| #if FF_API_DASH_MIN_SEG_DURATION |
| if (c->min_seg_duration != 5000000) { |
| av_log(s, AV_LOG_WARNING, "The min_seg_duration option is deprecated and will be removed. Please use the -seg_duration\n"); |
| c->seg_duration = c->min_seg_duration; |
| } |
| #endif |
| |
| av_strlcpy(c->dirname, s->url, sizeof(c->dirname)); |
| ptr = strrchr(c->dirname, '/'); |
| if (ptr) { |
| av_strlcpy(basename, &ptr[1], sizeof(basename)); |
| ptr[1] = '\0'; |
| } else { |
| c->dirname[0] = '\0'; |
| av_strlcpy(basename, s->url, sizeof(basename)); |
| } |
| |
| ptr = strrchr(basename, '.'); |
| if (ptr) |
| *ptr = '\0'; |
| |
| c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams); |
| if (!c->streams) |
| return AVERROR(ENOMEM); |
| |
| if ((ret = parse_adaptation_sets(s)) < 0) |
| return ret; |
| |
| for (i = 0; i < s->nb_streams; i++) { |
| OutputStream *os = &c->streams[i]; |
| AdaptationSet *as = &c->as[os->as_idx - 1]; |
| AVFormatContext *ctx; |
| AVStream *st; |
| AVDictionary *opts = NULL; |
| char filename[1024]; |
| |
| os->bit_rate = s->streams[i]->codecpar->bit_rate; |
| if (!os->bit_rate) { |
| int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ? |
| AV_LOG_ERROR : AV_LOG_WARNING; |
| av_log(s, level, "No bit rate set for stream %d\n", i); |
| if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT) |
| return AVERROR(EINVAL); |
| } |
| |
| // copy AdaptationSet language and role from stream metadata |
| dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language"); |
| dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role"); |
| |
| ctx = avformat_alloc_context(); |
| if (!ctx) |
| return AVERROR(ENOMEM); |
| |
| c->format_name = get_format_str(c->segment_type); |
| if (!c->format_name) |
| return AVERROR_MUXER_NOT_FOUND; |
| if (c->segment_type == SEGMENT_TYPE_WEBM) { |
| if ((!c->single_file && check_file_extension(c->init_seg_name, c->format_name) != 0) || |
| (!c->single_file && check_file_extension(c->media_seg_name, c->format_name) != 0) || |
| (c->single_file && check_file_extension(c->single_file_name, c->format_name) != 0)) { |
| av_log(s, AV_LOG_WARNING, |
| "One or many segment file names doesn't end with .webm. " |
| "Override -init_seg_name and/or -media_seg_name and/or " |
| "-single_file_name to end with the extension .webm\n"); |
| } |
| } |
| |
| ctx->oformat = av_guess_format(c->format_name, NULL, NULL); |
| if (!ctx->oformat) |
| return AVERROR_MUXER_NOT_FOUND; |
| os->ctx = ctx; |
| ctx->interrupt_callback = s->interrupt_callback; |
| ctx->opaque = s->opaque; |
| ctx->io_close = s->io_close; |
| ctx->io_open = s->io_open; |
| ctx->strict_std_compliance = s->strict_std_compliance; |
| |
| if (!(st = avformat_new_stream(ctx, NULL))) |
| return AVERROR(ENOMEM); |
| avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar); |
| st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio; |
| st->time_base = s->streams[i]->time_base; |
| st->avg_frame_rate = s->streams[i]->avg_frame_rate; |
| ctx->avoid_negative_ts = s->avoid_negative_ts; |
| ctx->flags = s->flags; |
| |
| if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0) |
| return ret; |
| |
| if (c->single_file) { |
| if (c->single_file_name) |
| ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->single_file_name, i, 0, os->bit_rate, 0); |
| else |
| snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.m4s", basename, i); |
| } else { |
| ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->init_seg_name, i, 0, os->bit_rate, 0); |
| } |
| snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile); |
| set_http_options(&opts, c); |
| ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts); |
| if (ret < 0) |
| return ret; |
| av_dict_free(&opts); |
| os->init_start_pos = 0; |
| |
| if (c->format_options_str) { |
| ret = av_dict_parse_string(&opts, c->format_options_str, "=", ":", 0); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if (c->segment_type == SEGMENT_TYPE_MP4) { |
| if (c->streaming) |
| av_dict_set(&opts, "movflags", "frag_every_frame+dash+delay_moov+global_sidx", 0); |
| else |
| av_dict_set(&opts, "movflags", "frag_custom+dash+delay_moov", 0); |
| } else { |
| av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0); |
| av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit |
| av_dict_set_int(&opts, "dash", 1, 0); |
| av_dict_set_int(&opts, "dash_track_number", i + 1, 0); |
| av_dict_set_int(&opts, "live", 1, 0); |
| } |
| if ((ret = avformat_init_output(ctx, &opts)) < 0) |
| return ret; |
| os->ctx_inited = 1; |
| avio_flush(ctx->pb); |
| av_dict_free(&opts); |
| |
| av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename); |
| |
| s->streams[i]->time_base = st->time_base; |
| // If the muxer wants to shift timestamps, request to have them shifted |
| // already before being handed to this muxer, so we don't have mismatches |
| // between the MPD and the actual segments. |
| s->avoid_negative_ts = ctx->avoid_negative_ts; |
| if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) { |
| AVRational avg_frame_rate = s->streams[i]->avg_frame_rate; |
| if (avg_frame_rate.num > 0) { |
| if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0) |
| as->min_frame_rate = avg_frame_rate; |
| if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0) |
| as->max_frame_rate = avg_frame_rate; |
| } else { |
| as->ambiguous_frame_rate = 1; |
| } |
| c->has_video = 1; |
| } |
| |
| set_codec_str(s, st->codecpar, &st->avg_frame_rate, os->codec_str, |
| sizeof(os->codec_str)); |
| os->first_pts = AV_NOPTS_VALUE; |
| os->max_pts = AV_NOPTS_VALUE; |
| os->last_dts = AV_NOPTS_VALUE; |
| os->segment_index = 1; |
| } |
| |
| if (!c->has_video && c->seg_duration <= 0) { |
| av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n"); |
| return AVERROR(EINVAL); |
| } |
| return 0; |
| } |
| |
| static int dash_write_header(AVFormatContext *s) |
| { |
| DASHContext *c = s->priv_data; |
| int i, ret; |
| for (i = 0; i < s->nb_streams; i++) { |
| OutputStream *os = &c->streams[i]; |
| if ((ret = avformat_write_header(os->ctx, NULL)) < 0) |
| return ret; |
| |
| // Flush init segment |
| // Only for WebM segment, since for mp4 delay_moov is set and |
| // the init segment is thus flushed after the first packets. |
| if (c->segment_type == SEGMENT_TYPE_WEBM && |
| (ret = flush_init_segment(s, os)) < 0) |
| return ret; |
| } |
| return ret; |
| } |
| |
| static int add_segment(OutputStream *os, const char *file, |
| int64_t time, int duration, |
| int64_t start_pos, int64_t range_length, |
| int64_t index_length, int next_exp_index) |
| { |
| int err; |
| Segment *seg; |
| if (os->nb_segments >= os->segments_size) { |
| os->segments_size = (os->segments_size + 1) * 2; |
| if ((err = av_reallocp(&os->segments, sizeof(*os->segments) * |
| os->segments_size)) < 0) { |
| os->segments_size = 0; |
| os->nb_segments = 0; |
| return err; |
| } |
| } |
| seg = av_mallocz(sizeof(*seg)); |
| if (!seg) |
| return AVERROR(ENOMEM); |
| av_strlcpy(seg->file, file, sizeof(seg->file)); |
| seg->time = time; |
| seg->duration = duration; |
| if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list |
| seg->duration += seg->time; |
| seg->time = 0; |
| } |
| seg->start_pos = start_pos; |
| seg->range_length = range_length; |
| seg->index_length = index_length; |
| os->segments[os->nb_segments++] = seg; |
| os->segment_index++; |
| //correcting the segment index if it has fallen behind the expected value |
| if (os->segment_index < next_exp_index) { |
| av_log(NULL, AV_LOG_WARNING, "Correcting the segment index after file %s: current=%d corrected=%d\n", |
| file, os->segment_index, next_exp_index); |
| os->segment_index = next_exp_index; |
| } |
| return 0; |
| } |
| |
| static void write_styp(AVIOContext *pb) |
| { |
| avio_wb32(pb, 24); |
| ffio_wfourcc(pb, "styp"); |
| ffio_wfourcc(pb, "msdh"); |
| avio_wb32(pb, 0); /* minor */ |
| ffio_wfourcc(pb, "msdh"); |
| ffio_wfourcc(pb, "msix"); |
| } |
| |
| static void find_index_range(AVFormatContext *s, const char *full_path, |
| int64_t pos, int *index_length) |
| { |
| uint8_t buf[8]; |
| AVIOContext *pb; |
| int ret; |
| |
| ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL); |
| if (ret < 0) |
| return; |
| if (avio_seek(pb, pos, SEEK_SET) != pos) { |
| ff_format_io_close(s, &pb); |
| return; |
| } |
| ret = avio_read(pb, buf, 8); |
| ff_format_io_close(s, &pb); |
| if (ret < 8) |
| return; |
| if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x')) |
| return; |
| *index_length = AV_RB32(&buf[0]); |
| } |
| |
| static int update_stream_extradata(AVFormatContext *s, OutputStream *os, |
| AVCodecParameters *par, |
| AVRational *frame_rate) |
| { |
| uint8_t *extradata; |
| |
| if (os->ctx->streams[0]->codecpar->extradata_size || !par->extradata_size) |
| return 0; |
| |
| extradata = av_malloc(par->extradata_size); |
| |
| if (!extradata) |
| return AVERROR(ENOMEM); |
| |
| memcpy(extradata, par->extradata, par->extradata_size); |
| |
| os->ctx->streams[0]->codecpar->extradata = extradata; |
| os->ctx->streams[0]->codecpar->extradata_size = par->extradata_size; |
| |
| set_codec_str(s, par, frame_rate, os->codec_str, sizeof(os->codec_str)); |
| |
| return 0; |
| } |
| |
| static void dashenc_delete_file(AVFormatContext *s, char *filename) { |
| DASHContext *c = s->priv_data; |
| int http_base_proto = ff_is_http_proto(filename); |
| |
| if (http_base_proto) { |
| AVIOContext *out = NULL; |
| AVDictionary *http_opts = NULL; |
| |
| set_http_options(&http_opts, c); |
| av_dict_set(&http_opts, "method", "DELETE", 0); |
| |
| if (dashenc_io_open(s, &out, filename, &http_opts) < 0) { |
| av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename); |
| } |
| |
| av_dict_free(&http_opts); |
| dashenc_io_close(s, &out, filename); |
| } else if (unlink(filename) < 0) { |
| av_log(s, AV_LOG_ERROR, "failed to delete %s: %s\n", filename, strerror(errno)); |
| } |
| } |
| |
| static int dash_flush(AVFormatContext *s, int final, int stream) |
| { |
| DASHContext *c = s->priv_data; |
| int i, ret = 0; |
| |
| const char *proto = avio_find_protocol_name(s->url); |
| int use_rename = proto && !strcmp(proto, "file"); |
| |
| int cur_flush_segment_index = 0, next_exp_index = -1; |
| if (stream >= 0) { |
| cur_flush_segment_index = c->streams[stream].segment_index; |
| |
| //finding the next segment's expected index, based on the current pts value |
| if (c->use_template && !c->use_timeline && c->index_correction && |
| c->streams[stream].last_pts != AV_NOPTS_VALUE && |
| c->streams[stream].first_pts != AV_NOPTS_VALUE) { |
| int64_t pts_diff = av_rescale_q(c->streams[stream].last_pts - |
| c->streams[stream].first_pts, |
| s->streams[stream]->time_base, |
| AV_TIME_BASE_Q); |
| next_exp_index = (pts_diff / c->seg_duration) + 1; |
| } |
| } |
| |
| for (i = 0; i < s->nb_streams; i++) { |
| OutputStream *os = &c->streams[i]; |
| AVStream *st = s->streams[i]; |
| int range_length, index_length = 0; |
| |
| if (!os->packets_written) |
| continue; |
| |
| // Flush the single stream that got a keyframe right now. |
| // Flush all audio streams as well, in sync with video keyframes, |
| // but not the other video streams. |
| if (stream >= 0 && i != stream) { |
| if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO) |
| continue; |
| // Make sure we don't flush audio streams multiple times, when |
| // all video streams are flushed one at a time. |
| if (c->has_video && os->segment_index > cur_flush_segment_index) |
| continue; |
| } |
| |
| if (!c->single_file) { |
| if (c->segment_type == SEGMENT_TYPE_MP4 && !os->written_len) |
| write_styp(os->ctx->pb); |
| } else { |
| snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile); |
| } |
| |
| ret = flush_dynbuf(os, &range_length); |
| if (ret < 0) |
| break; |
| os->packets_written = 0; |
| |
| if (c->single_file) { |
| find_index_range(s, os->full_path, os->pos, &index_length); |
| } else { |
| dashenc_io_close(s, &os->out, os->temp_path); |
| |
| if (use_rename) { |
| ret = avpriv_io_move(os->temp_path, os->full_path); |
| if (ret < 0) |
| break; |
| } |
| } |
| |
| if (!os->muxer_overhead) |
| os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) * |
| 8 * AV_TIME_BASE) / |
| av_rescale_q(os->max_pts - os->start_pts, |
| st->time_base, AV_TIME_BASE_Q); |
| os->total_pkt_size = 0; |
| |
| if (!os->bit_rate) { |
| // calculate average bitrate of first segment |
| int64_t bitrate = (int64_t) range_length * 8 * AV_TIME_BASE / av_rescale_q(os->max_pts - os->start_pts, |
| st->time_base, |
| AV_TIME_BASE_Q); |
| if (bitrate >= 0) |
| os->bit_rate = bitrate; |
| } |
| add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length, next_exp_index); |
| av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path); |
| |
| os->pos += range_length; |
| } |
| |
| if (c->window_size || (final && c->remove_at_exit)) { |
| for (i = 0; i < s->nb_streams; i++) { |
| OutputStream *os = &c->streams[i]; |
| int j; |
| int remove = os->nb_segments - c->window_size - c->extra_window_size; |
| if (final && c->remove_at_exit) |
| remove = os->nb_segments; |
| if (remove > 0) { |
| for (j = 0; j < remove; j++) { |
| char filename[1024]; |
| snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->segments[j]->file); |
| dashenc_delete_file(s, filename); |
| av_free(os->segments[j]); |
| } |
| os->nb_segments -= remove; |
| memmove(os->segments, os->segments + remove, os->nb_segments * sizeof(*os->segments)); |
| } |
| } |
| } |
| |
| if (ret >= 0) |
| ret = write_manifest(s, final); |
| return ret; |
| } |
| |
| static int dash_write_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| DASHContext *c = s->priv_data; |
| AVStream *st = s->streams[pkt->stream_index]; |
| OutputStream *os = &c->streams[pkt->stream_index]; |
| int64_t seg_end_duration, elapsed_duration; |
| int ret; |
| |
| ret = update_stream_extradata(s, os, st->codecpar, &st->avg_frame_rate); |
| if (ret < 0) |
| return ret; |
| |
| // Fill in a heuristic guess of the packet duration, if none is available. |
| // The mp4 muxer will do something similar (for the last packet in a fragment) |
| // if nothing is set (setting it for the other packets doesn't hurt). |
| // By setting a nonzero duration here, we can be sure that the mp4 muxer won't |
| // invoke its heuristic (this doesn't have to be identical to that algorithm), |
| // so that we know the exact timestamps of fragments. |
| if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE) |
| pkt->duration = pkt->dts - os->last_dts; |
| os->last_dts = pkt->dts; |
| |
| // If forcing the stream to start at 0, the mp4 muxer will set the start |
| // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps. |
| if (os->first_pts == AV_NOPTS_VALUE && |
| s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) { |
| pkt->pts -= pkt->dts; |
| pkt->dts = 0; |
| } |
| |
| if (os->first_pts == AV_NOPTS_VALUE) |
| os->first_pts = pkt->pts; |
| os->last_pts = pkt->pts; |
| |
| if (!c->availability_start_time[0]) |
| format_date_now(c->availability_start_time, |
| sizeof(c->availability_start_time)); |
| |
| if (!os->availability_time_offset && pkt->duration) { |
| int64_t frame_duration = av_rescale_q(pkt->duration, st->time_base, |
| AV_TIME_BASE_Q); |
| os->availability_time_offset = ((double) c->seg_duration - |
| frame_duration) / AV_TIME_BASE; |
| } |
| |
| if (c->use_template && !c->use_timeline) { |
| elapsed_duration = pkt->pts - os->first_pts; |
| seg_end_duration = (int64_t) os->segment_index * c->seg_duration; |
| } else { |
| elapsed_duration = pkt->pts - os->start_pts; |
| seg_end_duration = c->seg_duration; |
| } |
| |
| if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) && |
| pkt->flags & AV_PKT_FLAG_KEY && os->packets_written && |
| av_compare_ts(elapsed_duration, st->time_base, |
| seg_end_duration, AV_TIME_BASE_Q) >= 0) { |
| int64_t prev_duration = c->last_duration; |
| |
| c->last_duration = av_rescale_q(pkt->pts - os->start_pts, |
| st->time_base, |
| AV_TIME_BASE_Q); |
| c->total_duration = av_rescale_q(pkt->pts - os->first_pts, |
| st->time_base, |
| AV_TIME_BASE_Q); |
| |
| if ((!c->use_timeline || !c->use_template) && prev_duration) { |
| if (c->last_duration < prev_duration*9/10 || |
| c->last_duration > prev_duration*11/10) { |
| av_log(s, AV_LOG_WARNING, |
| "Segment durations differ too much, enable use_timeline " |
| "and use_template, or keep a stricter keyframe interval\n"); |
| } |
| } |
| |
| if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0) |
| return ret; |
| } |
| |
| if (!os->packets_written) { |
| // If we wrote a previous segment, adjust the start time of the segment |
| // to the end of the previous one (which is the same as the mp4 muxer |
| // does). This avoids gaps in the timeline. |
| if (os->max_pts != AV_NOPTS_VALUE) |
| os->start_pts = os->max_pts; |
| else |
| os->start_pts = pkt->pts; |
| } |
| if (os->max_pts == AV_NOPTS_VALUE) |
| os->max_pts = pkt->pts + pkt->duration; |
| else |
| os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration); |
| os->packets_written++; |
| os->total_pkt_size += pkt->size; |
| if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0) |
| return ret; |
| |
| if (!os->init_range_length) |
| flush_init_segment(s, os); |
| |
| //open the output context when the first frame of a segment is ready |
| if (!c->single_file && os->packets_written == 1) { |
| AVDictionary *opts = NULL; |
| const char *proto = avio_find_protocol_name(s->url); |
| int use_rename = proto && !strcmp(proto, "file"); |
| os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0'; |
| ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename), |
| c->media_seg_name, pkt->stream_index, |
| os->segment_index, os->bit_rate, os->start_pts); |
| snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, |
| os->filename); |
| snprintf(os->temp_path, sizeof(os->temp_path), |
| use_rename ? "%s.tmp" : "%s", os->full_path); |
| set_http_options(&opts, c); |
| ret = dashenc_io_open(s, &os->out, os->temp_path, &opts); |
| if (ret < 0) |
| return ret; |
| av_dict_free(&opts); |
| } |
| |
| //write out the data immediately in streaming mode |
| if (c->streaming && c->segment_type == SEGMENT_TYPE_MP4) { |
| int len = 0; |
| uint8_t *buf = NULL; |
| if (!os->written_len) |
| write_styp(os->ctx->pb); |
| avio_flush(os->ctx->pb); |
| len = avio_get_dyn_buf (os->ctx->pb, &buf); |
| avio_write(os->out, buf + os->written_len, len - os->written_len); |
| os->written_len = len; |
| avio_flush(os->out); |
| } |
| |
| return ret; |
| } |
| |
| static int dash_write_trailer(AVFormatContext *s) |
| { |
| DASHContext *c = s->priv_data; |
| |
| if (s->nb_streams > 0) { |
| OutputStream *os = &c->streams[0]; |
| // If no segments have been written so far, try to do a crude |
| // guess of the segment duration |
| if (!c->last_duration) |
| c->last_duration = av_rescale_q(os->max_pts - os->start_pts, |
| s->streams[0]->time_base, |
| AV_TIME_BASE_Q); |
| c->total_duration = av_rescale_q(os->max_pts - os->first_pts, |
| s->streams[0]->time_base, |
| AV_TIME_BASE_Q); |
| } |
| dash_flush(s, 1, -1); |
| |
| if (c->remove_at_exit) { |
| char filename[1024]; |
| int i; |
| for (i = 0; i < s->nb_streams; i++) { |
| OutputStream *os = &c->streams[i]; |
| snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile); |
| dashenc_delete_file(s, filename); |
| } |
| dashenc_delete_file(s, s->url); |
| } |
| |
| return 0; |
| } |
| |
| static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt) |
| { |
| DASHContext *c = s->priv_data; |
| OutputStream *os = &c->streams[avpkt->stream_index]; |
| AVFormatContext *oc = os->ctx; |
| if (oc->oformat->check_bitstream) { |
| int ret; |
| AVPacket pkt = *avpkt; |
| pkt.stream_index = 0; |
| ret = oc->oformat->check_bitstream(oc, &pkt); |
| if (ret == 1) { |
| AVStream *st = s->streams[avpkt->stream_index]; |
| AVStream *ost = oc->streams[0]; |
| st->internal->bsfcs = ost->internal->bsfcs; |
| st->internal->nb_bsfcs = ost->internal->nb_bsfcs; |
| ost->internal->bsfcs = NULL; |
| ost->internal->nb_bsfcs = 0; |
| } |
| return ret; |
| } |
| return 1; |
| } |
| |
| #define OFFSET(x) offsetof(DASHContext, x) |
| #define E AV_OPT_FLAG_ENCODING_PARAM |
| static const AVOption options[] = { |
| { "adaptation_sets", "Adaptation sets. Syntax: id=0,streams=0,1,2 id=1,streams=3,4 and so on", OFFSET(adaptation_sets), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, |
| { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E }, |
| { "extra_window_size", "number of segments kept outside of the manifest before removing from disk", OFFSET(extra_window_size), AV_OPT_TYPE_INT, { .i64 = 5 }, 0, INT_MAX, E }, |
| #if FF_API_DASH_MIN_SEG_DURATION |
| { "min_seg_duration", "minimum segment duration (in microseconds) (will be deprecated)", OFFSET(min_seg_duration), AV_OPT_TYPE_INT, { .i64 = 5000000 }, 0, INT_MAX, E }, |
| #endif |
| { "seg_duration", "segment duration (in seconds, fractional value can be set)", OFFSET(seg_duration), AV_OPT_TYPE_DURATION, { .i64 = 5000000 }, 0, INT_MAX, E }, |
| { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E }, |
| { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E }, |
| { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E }, |
| { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E }, |
| { "single_file_name", "DASH-templated name to be used for baseURL. Implies storing all segments in one file, accessed using byte ranges", OFFSET(single_file_name), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E }, |
| { "init_seg_name", "DASH-templated name to used for the initialization segment", OFFSET(init_seg_name), AV_OPT_TYPE_STRING, {.str = "init-stream$RepresentationID$.m4s"}, 0, 0, E }, |
| { "media_seg_name", "DASH-templated name to used for the media segments", OFFSET(media_seg_name), AV_OPT_TYPE_STRING, {.str = "chunk-stream$RepresentationID$-$Number%05d$.m4s"}, 0, 0, E }, |
| { "utc_timing_url", "URL of the page that will return the UTC timestamp in ISO format", OFFSET(utc_timing_url), AV_OPT_TYPE_STRING, { 0 }, 0, 0, E }, |
| { "method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E }, |
| { "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E}, |
| { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E }, |
| { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E }, |
| { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E }, |
| { "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E }, |
| { "index_correction", "Enable/Disable segment index correction logic", OFFSET(index_correction), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E }, |
| { "format_options","set list of options for the container format (mp4/webm) used for dash", OFFSET(format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E}, |
| { "dash_segment_type", "set dash segment files type", OFFSET(segment_type), AV_OPT_TYPE_INT, {.i64 = SEGMENT_TYPE_MP4 }, 0, SEGMENT_TYPE_NB - 1, E, "segment_type"}, |
| { "mp4", "make segment file in ISOBMFF format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_MP4 }, 0, UINT_MAX, E, "segment_type"}, |
| { "webm", "make segment file in WebM format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_WEBM }, 0, UINT_MAX, E, "segment_type"}, |
| { NULL }, |
| }; |
| |
| static const AVClass dash_class = { |
| .class_name = "dash muxer", |
| .item_name = av_default_item_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| AVOutputFormat ff_dash_muxer = { |
| .name = "dash", |
| .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"), |
| .extensions = "mpd", |
| .priv_data_size = sizeof(DASHContext), |
| .audio_codec = AV_CODEC_ID_AAC, |
| .video_codec = AV_CODEC_ID_H264, |
| .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE, |
| .init = dash_init, |
| .write_header = dash_write_header, |
| .write_packet = dash_write_packet, |
| .write_trailer = dash_write_trailer, |
| .deinit = dash_free, |
| .check_bitstream = dash_check_bitstream, |
| .priv_class = &dash_class, |
| }; |
