[FFmpeg-devel] [PATCH] hls: create an AVProgram for each variant

[LYF]

Without the information, application may choose audio from one variant
and video from another variant, which leads to fetch two variants from
network. This enables av_find_best_stream() to find matching audio and
video streams, so that only one variant is fetched from network.

Signed-off-by: LYF <yefei.li at gmail.com>
---
 libavformat/hls.c |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/libavformat/hls.c b/libavformat/hls.c
index ef5803b..e29ab02 100644
--- a/libavformat/hls.c
+++ b/libavformat/hls.c
@@ -504,6 +504,7 @@ static int hls_read_header(AVFormatContext *s)
         struct variant *v = c->variants[i];
         AVInputFormat *in_fmt = NULL;
         char bitrate_str[20];
+        AVProgram * program = NULL;
         if (v->n_segments == 0)
             continue;
 
@@ -549,6 +550,13 @@ static int hls_read_header(AVFormatContext *s)
         if (ret < 0)
             goto fail;
         snprintf(bitrate_str, sizeof(bitrate_str), "%d", v->bandwidth);
+
+        /* Create new AVprogram for variant i */
+        program = av_new_program(s, i);
+        if ( !program )
+            goto fail;
+        av_dict_set(&program->metadata, "variant_bitrate", bitrate_str, 0);
+
         /* Create new AVStreams for each stream in this variant */
         for (j = 0; j < v->ctx->nb_streams; j++) {
             AVStream *st = avformat_new_stream(s, NULL);
@@ -556,6 +564,7 @@ static int hls_read_header(AVFormatContext *s)
                 ret = AVERROR(ENOMEM);
                 goto fail;
             }
+            ff_program_add_stream_index(s, i, stream_offset + j);
             st->id = i;
             avcodec_copy_context(st->codec, v->ctx->streams[j]->codec);
             if (v->bandwidth)
-- 
1.7.9.5