[SCM] libav/experimental: Only 4-bit ADPCM IMA WAV files are supported.

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit b9542223a3f338e98e1d795273c2aaae775ae898
Author: Carl Eugen Hoyos <cehoyos at rainbow.studorg.tuwien.ac.at>
Date:   Sun Jul 25 14:33:16 2010 +0000

    Only 4-bit ADPCM IMA WAV files are supported.
    
    Originally committed as revision 24493 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c
index eb044ba..dbb57e5 100644
--- a/libavcodec/adpcm.c
+++ b/libavcodec/adpcm.c
@@ -721,6 +721,12 @@ static av_cold int adpcm_decode_init(AVCodecContext * avctx)
     case CODEC_ID_ADPCM_CT:
         c->status[0].step = c->status[1].step = 511;
         break;
+    case CODEC_ID_ADPCM_IMA_WAV:
+        if (avctx->bits_per_coded_sample != 4) {
+            av_log(avctx, AV_LOG_ERROR, "Only 4-bit ADPCM IMA WAV files are supported\n");
+            return -1;
+        }
+        break;
     case CODEC_ID_ADPCM_IMA_WS:
         if (avctx->extradata && avctx->extradata_size == 2 * 4) {
             c->status[0].predictor = AV_RL32(avctx->extradata);

-- 
Libav/FFmpeg packaging