Fix decoding of G.726 in AIFF.

Fixes ticket #1973.

libavformat/aiff.h

@@ -46,7 +46,7 @@ static const AVCodecTag ff_codec_aiff_tags[] = {
     { AV_CODEC_ID_MACE6,        MKTAG('M','A','C','6') },
     { AV_CODEC_ID_GSM,          MKTAG('G','S','M',' ') },
     { AV_CODEC_ID_ADPCM_G722,   MKTAG('G','7','2','2') },
-    { AV_CODEC_ID_ADPCM_G726,   MKTAG('G','7','2','6') },
+    { AV_CODEC_ID_ADPCM_G726LE, MKTAG('G','7','2','6') },
     { AV_CODEC_ID_PCM_S16BE,    MKTAG('t','w','o','s') },
     { AV_CODEC_ID_PCM_S16LE,    MKTAG('s','o','w','t') },
     { AV_CODEC_ID_ADPCM_IMA_QT, MKTAG('i','m','a','4') },

libavformat/aiffdec.c

@@ -141,6 +141,8 @@ static unsigned int get_aiff_header(AVFormatContext *s, int size,
         case AV_CODEC_ID_MACE3:
             codec->block_align = 2*codec->channels;
             break;
+        case AV_CODEC_ID_ADPCM_G726LE:
+            codec->bits_per_coded_sample = 5;
         case AV_CODEC_ID_ADPCM_G722:
         case AV_CODEC_ID_MACE6:
             codec->block_align = 1*codec->channels;