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Make the IMDCT temporary working buffer a local variable instead of keeping one for each channel. Saves 4KB of RAM.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22339 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Giacomelli 2009-08-16 02:24:09 +00:00
parent c74319b2f4
commit 415546921b
2 changed files with 5 additions and 5 deletions
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9
apps/codecs/libatrac/atrac3.c
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@ -665,17 +665,18 @@ static int decodeChannelSoundUnit (GetBitContext *gb, channel_unit *pSnd, int32_
if (lastTonal >= 0)
numBands = FFMAX((lastTonal + 256) >> 8, numBands);
/* Reconstruct time domain samples. */
for (band=0; band<4; band++) {
int32_t IMDCT_buf[1024];
/* Perform the IMDCT step without overlapping. */
if (band <= numBands) {
IMLT(&(pSnd->spectrum[band*256]), pSnd->IMDCT_buf, band&1);
IMLT(&(pSnd->spectrum[band*256]), IMDCT_buf, band&1);
} else
memset(pSnd->IMDCT_buf, 0, 512 * sizeof(int32_t));
memset(IMDCT_buf, 0, 512 * sizeof(int32_t));
/* gain compensation and overlapping */
gainCompensateAndOverlap (pSnd->IMDCT_buf, &(pSnd->prevFrame[band*256]), &(pOut[band*256]),
gainCompensateAndOverlap (IMDCT_buf, &(pSnd->prevFrame[band*256]), &(pOut[band*256]),
&((pSnd->gainBlock[1 - (pSnd->gcBlkSwitch)]).gBlock[band]),
&((pSnd->gainBlock[pSnd->gcBlkSwitch]).gBlock[band]));
}

1
apps/codecs/libatrac/atrac3.h
View file

@ -27,7 +27,6 @@ typedef struct {
gain_block gainBlock[2];
int32_t spectrum[1024] __attribute__((aligned(16)));
int32_t IMDCT_buf[1024] __attribute__((aligned(16)));
int32_t delayBuf1[46]; ///<qmf delay buffers
int32_t delayBuf2[46];