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Encoders: Mixdown to mono should round towards zero not -infinity.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11634 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2006-12-01 00:39:37 +00:00
parent 416acea2d8
commit 3b7d703329
4 changed files with 6 additions and 6 deletions
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4
apps/codecs/aiff_enc.c
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@ -240,10 +240,10 @@ static void chunk_to_aiff_format(uint32_t *src, uint32_t *dst)
int32_t lr1, lr2;
lr1 = *(*src)++;
lr1 = ((int16_t)lr1 + (lr1 >> 16)) >> 1;
lr1 = ((int16_t)lr1 + (lr1 >> 16)) / 2;
lr2 = *(*src)++;
lr2 = ((int16_t)lr2 + (lr2 >> 16)) >> 1;
lr2 = ((int16_t)lr2 + (lr2 >> 16)) / 2;
*(*dst)++ = swap_odd_even_le32((lr1 << 16) | (uint16_t)lr2);
} /* to_mono */

2
apps/codecs/mp3_enc.c
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@ -2055,7 +2055,7 @@ static void to_mono_mm(void)
inline void to_mono(uint32_t **samp)
{
int32_t lr = **samp;
int32_t m = ((int16_t)lr + (lr >> 16)) >> 1;
int32_t m = ((int16_t)lr + (lr >> 16)) / 2;
*(*samp)++ = (m << 16) | (uint16_t)m;
} /* to_mono */

4
apps/codecs/wav_enc.c
View file

@ -229,10 +229,10 @@ static void chunk_to_wav_format(uint32_t *src, uint32_t *dst)
int32_t lr1, lr2;
lr1 = *(*src)++;
lr1 = ((int16_t)lr1 + (lr1 >> 16)) >> 1;
lr1 = ((int16_t)lr1 + (lr1 >> 16)) / 2;
lr2 = *(*src)++;
lr2 = ((int16_t)lr2 + (lr2 >> 16)) >> 1;
lr2 = ((int16_t)lr2 + (lr2 >> 16)) / 2;
*(*dst)++ = swap_odd_even_be32((lr1 << 16) | (uint16_t)lr2);
} /* to_mono */

2
apps/codecs/wavpack_enc.c
View file

@ -126,7 +126,7 @@ static void chunk_to_int32(int32_t *src)
{
int32_t t = *(*src)++;
/* endianness irrelevant */
*(*dst)++ = ((int16_t)t + (t >> 16)) >> 1;
*(*dst)++ = ((int16_t)t + (t >> 16)) / 2;
} /* to_int32 */
do