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Fix iPod Classic playback slowness

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28989 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sparmann 2011-01-07 13:55:33 +00:00
parent 03da54bde2
commit c7b8d07181
1 changed files with 4 additions and 3 deletions
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7
firmware/target/arm/s5l8702/pcm-s5l8702.c
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@ -41,6 +41,7 @@ static const int zerosample = 0;
static unsigned char dblbuf[WATERMARK * 4] IBSS_ATTR;
struct dma_lli lli[(CHUNKSIZE - WATERMARK + LLIMAX - 1) / LLIMAX + 1]
__attribute__((aligned(16)));
struct dma_lli* lastlli;
static const unsigned char* dataptr;
static size_t remaining;
@ -75,7 +76,6 @@ void INT_DMAC0C0(void)
}
uint32_t lastsize = MIN(WATERMARK * 4, remaining);
remaining -= lastsize;
struct dma_lli* lastlli;
if (remaining) lastlli = &lli[ARRAYLEN(lli) - 1];
else lastlli = lli;
uint32_t chunksize = MIN(CHUNKSIZE * 4 - lastsize, remaining);
@ -155,11 +155,12 @@ void pcm_dma_apply_settings(void)
size_t pcm_get_bytes_waiting(void)
{
int bytes = remaining + (DMAC0C0LLI.control & 0xfff) * 2;
const struct dma_lli* lli = DMAC0C0LLI.nextlli;
int bytes = remaining;
const struct dma_lli* lli = &DMAC0C0LLI;
while (lli)
{
bytes += (lli->control & 0xfff) * 2;
if (lli == lastlli) break;
lli = lli->nextlli;
}
return bytes;