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Code Issues Releases Wiki Activity

Get rid of 16-bit sign extension macro

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@27151 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
reimar 2008-06-29 08:47:56 +00:00
parent 6767061f8b
commit 8532066166
1 changed files with 4 additions and 9 deletions
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13
libmpcodecs/ad_imaadpcm.c
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@ -63,8 +63,6 @@ static const int8_t adpcm_index[16] =
#define CLAMP_S16(x) x = av_clip_int16(x);
// clamp a number above 16
#define CLAMP_ABOVE_16(x) if (x < 16) x = 16;
// sign extend a 16-bit value
#define SE_16BIT(x) x = (int16_t)x;
// sign extend a 4-bit value
#define SE_4BIT(x) if (x & 0x8) x -= 0x10;
@ -185,11 +183,10 @@ static int qt_ima_adpcm_decode_block(unsigned short *output,
return -1;
for (i = 0; i < channels; i++) {
initial_index[i] = initial_predictor[i] = BE_16(&input[i * QT_IMA_ADPCM_BLOCK_SIZE]);
initial_index[i] = initial_predictor[i] = (int16_t)BE_16(&input[i * QT_IMA_ADPCM_BLOCK_SIZE]);
// mask, sign-extend, and clamp the predictor portion
initial_predictor[i] &= 0xFF80;
SE_16BIT(initial_predictor[i]);
initial_predictor[i] &= ~0x7F;
CLAMP_S16(initial_predictor[i]);
// mask and clamp the index portion
@ -236,8 +233,7 @@ static int ms_ima_adpcm_decode_block(unsigned short *output,
return -1;
for (i = 0; i < channels; i++) {
predictor[i] = LE_16(&input[i * 4]);
SE_16BIT(predictor[i]);
predictor[i] = (int16_t)LE_16(&input[i * 4]);
index[i] = input[i * 4 + 2];
}
@ -301,8 +297,7 @@ static int dk4_ima_adpcm_decode_block(unsigned short *output,
for (i = 0; i < channels; i++) {
// the first predictor value goes straight to the output
predictor[i] = output[i] = LE_16(&input[i * 4]);
SE_16BIT(predictor[i]);
predictor[i] = output[i] = (int16_t)LE_16(&input[i * 4]);
index[i] = input[i * 4 + 2];
}