[FFmpeg-cvslog] bink: pass Bink version to audio decoder through extradata instead of codec_tag.

[Kostya]

ffmpeg | branch: master | Kostya <kostya.shishkov at gmail.com> | Fri Jun 17 07:28:58 2011 +0000| [df64da3b1ef0c7014135bce44e5f82becf81fe79] | committer: Anton Khirnov

bink: pass Bink version to audio decoder through extradata instead of codec_tag.

This is needed because not all players (e.g. MPlayer) are able to distinguish
two different Bink audio decoders when codec_tag is set.

Signed-off-by: Anton Khirnov <anton at khirnov.net>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=df64da3b1ef0c7014135bce44e5f82becf81fe79
---

 libavcodec/binkaudio.c |    2 +-
 libavformat/bink.c     |    7 ++++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/libavcodec/binkaudio.c b/libavcodec/binkaudio.c
index a05b0b5..9722bdf 100644
--- a/libavcodec/binkaudio.c
+++ b/libavcodec/binkaudio.c
@@ -90,7 +90,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
         return -1;
     }
 
-    s->version_b = avctx->codec_tag == MKTAG('B','I','K','b');
+    s->version_b = avctx->extradata && avctx->extradata[3] == 'b';
 
     if (avctx->codec->id == CODEC_ID_BINKAUDIO_RDFT) {
         // audio is already interleaved for the RDFT format variant
diff --git a/libavformat/bink.c b/libavformat/bink.c
index 76b457c..0676738 100644
--- a/libavformat/bink.c
+++ b/libavformat/bink.c
@@ -134,13 +134,18 @@ static int read_header(AVFormatContext *s, AVFormatParameters *ap)
             if (!ast)
                 return AVERROR(ENOMEM);
             ast->codec->codec_type  = AVMEDIA_TYPE_AUDIO;
-            ast->codec->codec_tag   = vst->codec->codec_tag;
+            ast->codec->codec_tag   = 0;
             ast->codec->sample_rate = avio_rl16(pb);
             av_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
             flags = avio_rl16(pb);
             ast->codec->codec_id = flags & BINK_AUD_USEDCT ?
                                    CODEC_ID_BINKAUDIO_DCT : CODEC_ID_BINKAUDIO_RDFT;
             ast->codec->channels = flags & BINK_AUD_STEREO ? 2 : 1;
+            ast->codec->extradata = av_mallocz(4 + FF_INPUT_BUFFER_PADDING_SIZE);
+            if (!ast->codec->extradata)
+                return AVERROR(ENOMEM);
+            ast->codec->extradata_size = 4;
+            AV_WL32(ast->codec->extradata, vst->codec->codec_tag);
         }
 
         for (i = 0; i < bink->num_audio_tracks; i++)