diff options
Diffstat (limited to 'libavcodec/adpcm.c')
-rw-r--r-- | libavcodec/adpcm.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c index b77f4b8ef6..1366932352 100644 --- a/libavcodec/adpcm.c +++ b/libavcodec/adpcm.c @@ -689,11 +689,11 @@ static void adpcm_swf_decode(AVCodecContext *avctx, const uint8_t *buf, int buf_ } } -static inline int16_t adpcm_argo_expand_nibble(ADPCMChannelStatus *cs, int nibble, int control, int shift) +int16_t ff_adpcm_argo_expand_nibble(ADPCMChannelStatus *cs, int nibble, int shift, int flag) { - int sample = nibble * (1 << shift); + int sample = sign_extend(nibble, 4) * (1 << shift); - if (control & 0x04) + if (flag) sample += (8 * cs->sample1) - (4 * cs->sample2); else sample += 4 * cs->sample1; @@ -2007,8 +2007,8 @@ static int adpcm_decode_frame(AVCodecContext *avctx, void *data, for (n = 0; n < nb_samples / 2; n++) { int sample = bytestream2_get_byteu(&gb); - *samples++ = adpcm_argo_expand_nibble(cs, sign_extend(sample >> 4, 4), control, shift); - *samples++ = adpcm_argo_expand_nibble(cs, sign_extend(sample >> 0, 4), control, shift); + *samples++ = ff_adpcm_argo_expand_nibble(cs, sample >> 4, shift, control & 0x04); + *samples++ = ff_adpcm_argo_expand_nibble(cs, sample >> 0, shift, control & 0x04); } } break; |