[FFmpeg-devel] [PATCH 2/5] lavf: inject sample skip side data when requested by the demuxer

[Michael Niedermayer]

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
---
 libavformat/avformat.h |    5 +++++
 libavformat/utils.c    |    8 ++++++++
 2 files changed, 13 insertions(+)

diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 807c7ac..457845d 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -805,6 +805,11 @@ typedef struct AVStream {
      * should be discarded.
      */
     int skip_to_keyframe;
+
+    /**
+     * Number of samples to skip.
+     */
+    int skip_samples;
 } AVStream;
 
 #define AV_PROGRAM_RUNNING 1
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 70f8d46..931e3fb 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -1449,6 +1449,14 @@ int av_read_frame(AVFormatContext *s, AVPacket *pkt)
     }
 
 return_packet:
+
+    if(s->streams[pkt->stream_index]->skip_samples) {
+        uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
+        AV_WL32(p  , s->streams[pkt->stream_index]->skip_samples);
+        av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", s->streams[pkt->stream_index]->skip_samples);
+        s->streams[pkt->stream_index]->skip_samples = 0;
+    }
+
     if (is_relative(pkt->dts))
         pkt->dts -= RELATIVE_TS_BASE;
     if (is_relative(pkt->pts))
-- 
1.7.9.5