Imported Debian version 2.5.2~trusty

[deb_ffmpeg.git] / ffmpeg / libavformat / flvdec.c

diff --git a/ffmpeg/libavformat/flvdec.c b/ffmpeg/libavformat/flvdec.c
index 12d25b20ae1e7e694945e69ad819b9334d6505c3..54f2f56dba2bf644617ef986f776a6d4450f0453 100644 (file)
--- a/ffmpeg/libavformat/flvdec.c
+++ b/ffmpeg/libavformat/flvdec.c
@@ -459,11 +459,11 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream,
     }
 
     if (key) {
+        acodec = astream ? astream->codec : NULL;
+        vcodec = vstream ? vstream->codec : NULL;
+
         // stream info doesn't live any deeper than the first object
         if (depth == 1) {
-            acodec = astream ? astream->codec : NULL;
-            vcodec = vstream ? vstream->codec : NULL;
-
             if (amf_type == AMF_DATA_TYPE_NUMBER ||
                 amf_type == AMF_DATA_TYPE_BOOL) {
                 if (!strcmp(key, "duration"))
@@ -623,7 +623,7 @@ static int flv_read_close(AVFormatContext *s)
 
 static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
 {
-    av_free(st->codec->extradata);
+    av_freep(&st->codec->extradata);
     if (ff_get_extradata(st->codec, s->pb, size) < 0)
         return AVERROR(ENOMEM);
     return 0;
@@ -746,7 +746,7 @@ static int flv_data_packet(AVFormatContext *s, AVPacket *pkt,
     if (i == s->nb_streams) {
         st = create_stream(s, AVMEDIA_TYPE_DATA);
         if (!st)
-            return AVERROR_INVALIDDATA;
+            return AVERROR(ENOMEM);
         st->codec->codec_id = AV_CODEC_ID_TEXT;
     }
 
@@ -885,10 +885,14 @@ skip:
     if (s->pb->seekable && (!s->duration || s->duration == AV_NOPTS_VALUE) && !flv->searched_for_end) {
         int size;
         const int64_t pos   = avio_tell(s->pb);
+        // Read the last 4 bytes of the file, this should be the size of the
+        // previous FLV tag. Use the timestamp of its payload as duration.
         int64_t fsize       = avio_size(s->pb);
 retry_duration:
         avio_seek(s->pb, fsize - 4, SEEK_SET);
         size = avio_rb32(s->pb);
+        // Seek to the start of the last FLV tag at position (fsize - 4 - size)
+        // but skip the byte indicating the type.
         avio_seek(s->pb, fsize - 3 - size, SEEK_SET);
         if (size == avio_rb24(s->pb) + 11) {
             uint32_t ts = avio_rb24(s->pb);
@@ -930,6 +934,7 @@ retry_duration:
         } else {
             AVCodecContext ctx = {0};
             ctx.sample_rate = sample_rate;
+            ctx.bits_per_coded_sample = bits_per_coded_sample;
             flv_set_audio_codec(s, st, &ctx, flags & FLV_AUDIO_CODECID_MASK);
             sample_rate = ctx.sample_rate;
         }