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lavf/webm_dash: some fields should go into Representation
Width, Height and Sample Rate should be in the AdaptationSet tag only if all the contained representations have the same width, height and sampling rate. Otherwise they should go into the Representation tag. This patch adds this functionality and a fate test for the same. Signed-off-by: Vignesh Venkatasubramanian <vigneshv@google.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Vignesh Venkatasubramanian
Michael Niedermayer
parent
0d92b0d5f4
commit
a9b10e1510
@ -132,6 +132,80 @@ static int bitstream_switching(AVFormatContext *s, AdaptationSet *as) {
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return 1;
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}
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/*
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* Writes a Representation within an Adaptation Set. Returns 0 on success and
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* < 0 on failure.
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*/
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static int write_representation(AVFormatContext *s, AVStream *stream, int id,
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int output_width, int output_height,
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int output_sample_rate) {
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AVDictionaryEntry *irange = av_dict_get(stream->metadata, INITIALIZATION_RANGE, NULL, 0);
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AVDictionaryEntry *cues_start = av_dict_get(stream->metadata, CUES_START, NULL, 0);
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AVDictionaryEntry *cues_end = av_dict_get(stream->metadata, CUES_END, NULL, 0);
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AVDictionaryEntry *filename = av_dict_get(stream->metadata, FILENAME, NULL, 0);
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AVDictionaryEntry *bandwidth = av_dict_get(stream->metadata, BANDWIDTH, NULL, 0);
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if (!irange || cues_start == NULL || cues_end == NULL || filename == NULL ||
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!bandwidth) {
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return -1;
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}
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avio_printf(s->pb, "<Representation id=\"%d\"", id);
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avio_printf(s->pb, " bandwidth=\"%s\"", bandwidth->value);
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if (stream->codec->codec_type == AVMEDIA_TYPE_VIDEO && output_width)
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avio_printf(s->pb, " width=\"%d\"", stream->codec->width);
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if (stream->codec->codec_type == AVMEDIA_TYPE_VIDEO && output_height)
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avio_printf(s->pb, " height=\"%d\"", stream->codec->height);
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if (stream->codec->codec_type = AVMEDIA_TYPE_AUDIO && output_sample_rate)
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avio_printf(s->pb, " audioSamplingRate=\"%d\"", stream->codec->sample_rate);
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avio_printf(s->pb, ">\n");
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avio_printf(s->pb, "<BaseURL>%s</BaseURL>\n", filename->value);
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avio_printf(s->pb, "<SegmentBase\n");
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avio_printf(s->pb, " indexRange=\"%s-%s\">\n", cues_start->value, cues_end->value);
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avio_printf(s->pb, "<Initialization\n");
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avio_printf(s->pb, " range=\"0-%s\" />\n", irange->value);
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avio_printf(s->pb, "</SegmentBase>\n");
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avio_printf(s->pb, "</Representation>\n");
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return 0;
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}
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/*
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* Checks if width of all streams are the same. Returns 1 if true, 0 otherwise.
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*/
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static int check_matching_width(AVFormatContext *s, AdaptationSet *as) {
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int first_width, i;
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if (as->nb_streams < 2) return 1;
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first_width = s->streams[as->streams[0]]->codec->width;
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for (i = 1; i < as->nb_streams; i++)
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if (first_width != s->streams[as->streams[i]]->codec->width)
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return 0;
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return 1;
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}
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/*
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* Checks if height of all streams are the same. Returns 1 if true, 0 otherwise.
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*/
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static int check_matching_height(AVFormatContext *s, AdaptationSet *as) {
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int first_height, i;
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if (as->nb_streams < 2) return 1;
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first_height = s->streams[as->streams[0]]->codec->height;
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for (i = 1; i < as->nb_streams; i++)
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if (first_height != s->streams[as->streams[i]]->codec->height)
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return 0;
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return 1;
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}
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/*
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* Checks if sample rate of all streams are the same. Returns 1 if true, 0 otherwise.
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*/
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static int check_matching_sample_rate(AVFormatContext *s, AdaptationSet *as) {
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int first_sample_rate, i;
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if (as->nb_streams < 2) return 1;
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first_sample_rate = s->streams[as->streams[0]]->codec->sample_rate;
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for (i = 1; i < as->nb_streams; i++)
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if (first_sample_rate != s->streams[as->streams[i]]->codec->sample_rate)
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return 0;
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return 1;
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}
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/*
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* Writes an Adaptation Set. Returns 0 on success and < 0 on failure.
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*/
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@ -140,10 +214,22 @@ static int write_adaptation_set(AVFormatContext *s, int as_index)
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WebMDashMuxContext *w = s->priv_data;
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AdaptationSet *as = &w->as[as_index];
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AVCodecContext *codec = s->streams[as->streams[0]]->codec;
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AVDictionaryEntry *lang;
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int i;
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static const char boolean[2][6] = { "false", "true" };
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int subsegmentStartsWithSAP = 1;
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AVDictionaryEntry *lang;
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// Width, Height and Sample Rate will go in the AdaptationSet tag if they
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// are the same for all contained Representations. otherwise, they will go
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// on their respective Representation tag.
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int width_in_as = 1, height_in_as = 1, sample_rate_in_as = 1;
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if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
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width_in_as = check_matching_width(s, as);
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height_in_as = check_matching_height(s, as);
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} else {
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sample_rate_in_as = check_matching_sample_rate(s, as);
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}
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avio_printf(s->pb, "<AdaptationSet id=\"%s\"", as->id);
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avio_printf(s->pb, " mimeType=\"%s/webm\"",
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codec->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
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@ -152,12 +238,12 @@ static int write_adaptation_set(AVFormatContext *s, int as_index)
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lang = av_dict_get(s->streams[as->streams[0]]->metadata, "language", NULL, 0);
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if (lang) avio_printf(s->pb, " lang=\"%s\"", lang->value);
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if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
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if (codec->codec_type == AVMEDIA_TYPE_VIDEO && width_in_as)
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avio_printf(s->pb, " width=\"%d\"", codec->width);
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if (codec->codec_type == AVMEDIA_TYPE_VIDEO && height_in_as)
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avio_printf(s->pb, " height=\"%d\"", codec->height);
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} else {
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if (codec->codec_type == AVMEDIA_TYPE_AUDIO && sample_rate_in_as)
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avio_printf(s->pb, " audioSamplingRate=\"%d\"", codec->sample_rate);
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}
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avio_printf(s->pb, " bitstreamSwitching=\"%s\"",
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boolean[bitstream_switching(s, as)]);
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@ -173,26 +259,8 @@ static int write_adaptation_set(AVFormatContext *s, int as_index)
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avio_printf(s->pb, ">\n");
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for (i = 0; i < as->nb_streams; i++) {
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AVStream *stream = s->streams[as->streams[i]];
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AVDictionaryEntry *irange = av_dict_get(stream->metadata, INITIALIZATION_RANGE, NULL, 0);
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AVDictionaryEntry *cues_start = av_dict_get(stream->metadata, CUES_START, NULL, 0);
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AVDictionaryEntry *cues_end = av_dict_get(stream->metadata, CUES_END, NULL, 0);
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AVDictionaryEntry *filename = av_dict_get(stream->metadata, FILENAME, NULL, 0);
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AVDictionaryEntry *bandwidth = av_dict_get(stream->metadata, BANDWIDTH, NULL, 0);
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if (!irange || cues_start == NULL || cues_end == NULL || filename == NULL ||
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!bandwidth) {
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return -1;
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}
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avio_printf(s->pb, "<Representation id=\"%d\"", i);
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avio_printf(s->pb, " bandwidth=\"%s\"", bandwidth->value);
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avio_printf(s->pb, ">\n");
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avio_printf(s->pb, "<BaseURL>%s</BaseURL>\n", filename->value);
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avio_printf(s->pb, "<SegmentBase\n");
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avio_printf(s->pb, " indexRange=\"%s-%s\">\n", cues_start->value, cues_end->value);
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avio_printf(s->pb, "<Initialization\n");
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avio_printf(s->pb, " range=\"0-%s\" />\n", irange->value);
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avio_printf(s->pb, "</SegmentBase>\n");
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avio_printf(s->pb, "</Representation>\n");
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write_representation(s, s->streams[as->streams[i]], i,
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!width_in_as, !height_in_as, !sample_rate_in_as);
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}
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avio_printf(s->pb, "</AdaptationSet>\n");
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return 0;
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@ -37,6 +37,9 @@ fate-webm-dash-manifest-unaligned-video-streams: CMD = run ffmpeg -f webm_dash_m
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FATE_VP8-$(call DEMDEC, WEBM_DASH_MANIFEST, VP8) += fate-webm-dash-manifest-unaligned-audio-streams
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fate-webm-dash-manifest-unaligned-audio-streams: CMD = run ffmpeg -f webm_dash_manifest -i $(TARGET_SAMPLES)/vp8/dash_audio1.webm -f webm_dash_manifest -i $(TARGET_SAMPLES)/vp8/dash_audio3.webm -c copy -map 0 -map 1 -f webm_dash_manifest -adaptation_sets "id=0,streams=0,1" -
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FATE_VP8-$(call DEMDEC, WEBM_DASH_MANIFEST, VP8) += fate-webm-dash-manifest-representations
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fate-webm-dash-manifest-representations: CMD = run ffmpeg -f webm_dash_manifest -i $(TARGET_SAMPLES)/vp8/dash_video1.webm -f webm_dash_manifest -i $(TARGET_SAMPLES)/vp8/dash_video4.webm -c copy -map 0 -map 1 -f webm_dash_manifest -adaptation_sets "id=0,streams=0,1" -
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FATE_SAMPLES_AVCONV += $(FATE_VP6-yes)
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fate-vp6: $(FATE_VP6-yes)
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30
tests/ref/fate/webm-dash-manifest-representations
Normal file
30
tests/ref/fate/webm-dash-manifest-representations
Normal file
@ -0,0 +1,30 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<MPD
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xmlns="urn:mpeg:DASH:schema:MPD:2011"
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xsi:schemaLocation="urn:mpeg:DASH:schema:MPD:2011"
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type="static"
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mediaPresentationDuration="PT32.48S"
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minBufferTime="PT1S"
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profiles="urn:webm:dash:profile:webm-on-demand:2012">
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<Period id="0" start="PT0S" duration="PT32.48S" >
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<AdaptationSet id="0" mimeType="video/webm" codecs="vp8" lang="eng" bitstreamSwitching="true" subsegmentAlignment="false" subsegmentStartsWithSAP="1">
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<Representation id="0" bandwidth="302355" width="640" height="360">
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<BaseURL>dash_video1.webm</BaseURL>
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<SegmentBase
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indexRange="1115974-1116097">
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<Initialization
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range="0-441" />
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</SegmentBase>
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</Representation>
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<Representation id="1" bandwidth="243938" width="320" height="240">
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<BaseURL>dash_video4.webm</BaseURL>
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<SegmentBase
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indexRange="871124-871645">
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<Initialization
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range="0-437" />
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</SegmentBase>
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</Representation>
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</AdaptationSet>
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</Period>
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</MPD>
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