diff options
Diffstat (limited to 'libavcodec/pcm.c')
| -rw-r--r-- | libavcodec/pcm.c | 16 |
1 files changed, 4 insertions, 12 deletions
diff --git a/libavcodec/pcm.c b/libavcodec/pcm.c index 7f3d630f08..a6c0d343b0 100644 --- a/libavcodec/pcm.c +++ b/libavcodec/pcm.c @@ -45,19 +45,11 @@ static int alaw2linear(unsigned char a_val) a_val ^= 0x55; - t = (a_val & QUANT_MASK) << 4; + t = a_val & QUANT_MASK; seg = ((unsigned)a_val & SEG_MASK) >> SEG_SHIFT; - switch (seg) { - case 0: - t += 8; - break; - case 1: - t += 0x108; - break; - default: - t += 0x108; - t <<= seg - 1; - } + if(seg) t= (t + t + 1 + 32) << (seg + 2); + else t= (t + t + 1 ) << 3; + return ((a_val & SIGN_BIT) ? t : -t); } |