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https://git.ffmpeg.org/ffmpeg.git
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dashenc: add support for assigning streams to AdaptationSets
Also makes sure all streams are assigned to exactly one AdaptationSet. This patch is originally based partially on code by Vignesh Venkatasubramanian. Signed-off-by: Peter Große <pegro@friiks.de> Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Peter Große
Martin Storsjö
parent
9df9309d23
commit
3d23a5f96a
@ -24,6 +24,7 @@
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#include <unistd.h>
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#endif
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#include "libavutil/avutil.h"
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#include "libavutil/avstring.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/mathematics.h"
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@ -57,9 +58,14 @@ typedef struct Segment {
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int n;
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} Segment;
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typedef struct AdaptationSet {
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char id[10];
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enum AVMediaType media_type;
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} AdaptationSet;
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typedef struct OutputStream {
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AVFormatContext *ctx;
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int ctx_inited;
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int ctx_inited, as_idx;
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uint8_t iobuf[32768];
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AVIOContext *out;
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int packets_written;
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@ -78,6 +84,9 @@ typedef struct OutputStream {
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typedef struct DASHContext {
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const AVClass *class; /* Class for private options. */
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char *adaptation_sets;
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AdaptationSet *as;
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int nb_as;
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int window_size;
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int extra_window_size;
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int min_seg_duration;
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@ -86,7 +95,7 @@ typedef struct DASHContext {
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int use_timeline;
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int single_file;
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OutputStream *streams;
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int has_video, has_audio;
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int has_video;
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int64_t last_duration;
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int64_t total_duration;
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char availability_start_time[100];
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@ -175,6 +184,12 @@ static void dash_free(AVFormatContext *s)
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{
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DASHContext *c = s->priv_data;
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int i, j;
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if (c->as) {
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av_freep(&c->as);
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c->nb_as = 0;
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}
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if (!c->streams)
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return;
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for (i = 0; i < s->nb_streams; i++) {
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@ -435,12 +450,160 @@ static void format_date_now(char *buf, int size)
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}
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}
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static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index)
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{
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DASHContext *c = s->priv_data;
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AdaptationSet *as = &c->as[as_index];
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int i;
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avio_printf(out, "\t\t<AdaptationSet id=\"%s\" contentType=\"%s\" segmentAlignment=\"true\" bitstreamSwitching=\"true\">\n",
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as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
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for (i = 0; i < s->nb_streams; i++) {
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OutputStream *os = &c->streams[i];
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if (os->as_idx - 1 != as_index)
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continue;
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if (as->media_type == AVMEDIA_TYPE_VIDEO) {
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avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/mp4\" codecs=\"%s\"%s width=\"%d\" height=\"%d\">\n",
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i, os->codec_str, os->bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
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} else {
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avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/mp4\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
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i, os->codec_str, os->bandwidth_str, s->streams[i]->codecpar->sample_rate);
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avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
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s->streams[i]->codecpar->channels);
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}
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output_segment_list(os, out, c);
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avio_printf(out, "\t\t\t</Representation>\n");
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}
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avio_printf(out, "\t\t</AdaptationSet>\n");
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return 0;
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}
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static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
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{
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DASHContext *c = s->priv_data;
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void *mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
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if (!mem)
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return AVERROR(ENOMEM);
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c->as = mem;
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++c->nb_as;
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*as = &c->as[c->nb_as - 1];
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memset(*as, 0, sizeof(**as));
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(*as)->media_type = type;
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return 0;
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}
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static int parse_adaptation_sets(AVFormatContext *s)
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{
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DASHContext *c = s->priv_data;
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const char *p = c->adaptation_sets;
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enum { new_set, parse_id, parsing_streams } state;
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AdaptationSet *as;
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int i, n, ret;
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enum AVMediaType types[] = { AVMEDIA_TYPE_VIDEO, AVMEDIA_TYPE_AUDIO, AVMEDIA_TYPE_UNKNOWN };
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// default: one AdaptationSet for each media type
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if (!p) {
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for (n = 0; types[n] != AVMEDIA_TYPE_UNKNOWN; n++) {
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int as_idx = 0;
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for (i = 0; i < s->nb_streams; i++) {
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if (s->streams[i]->codecpar->codec_type != types[n])
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continue;
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if (!as_idx) {
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if ((ret = add_adaptation_set(s, &as, types[n])) < 0)
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return ret;
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as_idx = c->nb_as;
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snprintf(as->id, sizeof(as->id), "%d", i);
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}
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c->streams[i].as_idx = as_idx;
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}
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}
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goto end;
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}
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// syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
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state = new_set;
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while (*p) {
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if (*p == ' ') {
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p++;
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continue;
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} else if (state == new_set && av_strstart(p, "id=", &p)) {
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if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
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return ret;
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n = strcspn(p, ",");
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snprintf(as->id, sizeof(as->id), "%.*s", n, p);
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p += n;
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if (*p)
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p++;
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state = parse_id;
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} else if (state == parse_id && av_strstart(p, "streams=", &p)) {
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state = parsing_streams;
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} else if (state == parsing_streams) {
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AdaptationSet *as = &c->as[c->nb_as - 1];
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OutputStream *os;
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char idx_str[8], *end_str;
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n = strcspn(p, " ,");
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snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
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p += n;
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i = strtol(idx_str, &end_str, 10);
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if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
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av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
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return AVERROR(EINVAL);
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}
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os = &c->streams[i];
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if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
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as->media_type = s->streams[i]->codecpar->codec_type;
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} else if (as->media_type != s->streams[i]->codecpar->codec_type) {
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av_log(s, AV_LOG_ERROR, "Mixing codec types within an AdaptationSet is not allowed\n");
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return AVERROR(EINVAL);
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} else if (os->as_idx) {
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av_log(s, AV_LOG_ERROR, "Assigning a stream to more than one AdaptationSet is not allowed\n");
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return AVERROR(EINVAL);
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}
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os->as_idx = c->nb_as;
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if (*p == ' ')
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state = new_set;
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if (*p)
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p++;
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} else {
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return AVERROR(EINVAL);
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}
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}
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end:
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// check for unassigned streams
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for (i = 0; i < s->nb_streams; i++) {
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OutputStream *os = &c->streams[i];
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if (!os->as_idx) {
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av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
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return AVERROR(EINVAL);
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}
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}
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return 0;
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}
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static int write_manifest(AVFormatContext *s, int final)
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{
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DASHContext *c = s->priv_data;
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AVIOContext *out;
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char temp_filename[1024];
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int ret, i, as_id = 0;
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int ret, i;
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AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
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snprintf(temp_filename, sizeof(temp_filename), "%s.tmp", s->filename);
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@ -505,32 +668,9 @@ static int write_manifest(AVFormatContext *s, int final)
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avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
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}
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if (c->has_video) {
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avio_printf(out, "\t\t<AdaptationSet id=\"%d\" contentType=\"video\" segmentAlignment=\"true\" bitstreamSwitching=\"true\">\n", as_id++);
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for (i = 0; i < s->nb_streams; i++) {
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AVStream *st = s->streams[i];
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OutputStream *os = &c->streams[i];
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if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
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continue;
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avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/mp4\" codecs=\"%s\"%s width=\"%d\" height=\"%d\">\n", i, os->codec_str, os->bandwidth_str, st->codecpar->width, st->codecpar->height);
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output_segment_list(&c->streams[i], out, c);
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avio_printf(out, "\t\t\t</Representation>\n");
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}
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avio_printf(out, "\t\t</AdaptationSet>\n");
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}
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if (c->has_audio) {
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avio_printf(out, "\t\t<AdaptationSet id=\"%d\" contentType=\"audio\" segmentAlignment=\"true\" bitstreamSwitching=\"true\">\n", as_id++);
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for (i = 0; i < s->nb_streams; i++) {
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AVStream *st = s->streams[i];
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OutputStream *os = &c->streams[i];
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if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
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continue;
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avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/mp4\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n", i, os->codec_str, os->bandwidth_str, st->codecpar->sample_rate);
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avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n", st->codecpar->channels);
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output_segment_list(&c->streams[i], out, c);
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avio_printf(out, "\t\t\t</Representation>\n");
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}
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avio_printf(out, "\t\t</AdaptationSet>\n");
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for (i = 0; i < c->nb_as; i++) {
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if ((ret = write_adaptation_set(s, out, i)) < 0)
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return ret;
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}
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avio_printf(out, "\t</Period>\n");
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avio_printf(out, "</MPD>\n");
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@ -578,6 +718,9 @@ static int dash_write_header(AVFormatContext *s)
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goto fail;
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}
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if ((ret = parse_adaptation_sets(s)) < 0)
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goto fail;
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for (i = 0; i < s->nb_streams; i++) {
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OutputStream *os = &c->streams[i];
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AVFormatContext *ctx;
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@ -657,8 +800,6 @@ static int dash_write_header(AVFormatContext *s)
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s->avoid_negative_ts = ctx->avoid_negative_ts;
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if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
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c->has_video = 1;
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else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
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c->has_audio = 1;
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set_codec_str(s, st->codecpar, os->codec_str, sizeof(os->codec_str));
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os->first_pts = AV_NOPTS_VALUE;
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@ -984,6 +1125,7 @@ static int dash_write_trailer(AVFormatContext *s)
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#define OFFSET(x) offsetof(DASHContext, x)
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#define E AV_OPT_FLAG_ENCODING_PARAM
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static const AVOption options[] = {
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{ "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 },
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{ "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
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{ "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 },
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{ "min_seg_duration", "minimum segment duration (in microseconds)", OFFSET(min_seg_duration), AV_OPT_TYPE_INT64, { .i64 = 5000000 }, 0, INT_MAX, E },
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