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More fine-tuned buffer handling, and better debug info

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@2948 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Linus Nielsen Feltzing 2002-12-05 14:11:48 +00:00
parent 49d2190bd0
commit d29248d992
3 changed files with 26 additions and 14 deletions
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34
firmware/mpeg.c
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@ -47,6 +47,7 @@ static void stop_recording(void);
#ifndef SIMULATOR
static int get_unplayed_space(void);
static int get_playable_space(void);
static int get_unswapped_space(void);
#endif
@ -493,7 +494,7 @@ static void recalculate_watermark(int bitrate)
{
if(ata_spinup_time)
{
low_watermark = (low_watermark_margin + ata_spinup_time * 3 / HZ) *
low_watermark = (low_watermark_margin + ata_spinup_time * 2 / HZ) *
bitrate*1000 / 8;
}
else
@ -524,6 +525,7 @@ void mpeg_get_debugdata(struct mpeg_debug *dbgdata)
dbgdata->dma_underrun = dma_underrun;
dbgdata->unplayed_space = get_unplayed_space();
dbgdata->playable_space = get_playable_space();
dbgdata->unswapped_space = get_unswapped_space();
dbgdata->low_watermark_level = low_watermark;
@ -593,6 +595,14 @@ static int get_unplayed_space(void)
return space;
}
static int get_playable_space(void)
{
int space = mp3buf_swapwrite - mp3buf_read;
if (space < 0)
space += mp3buflen;
return space;
}
static int get_unplayed_space_current_song(void)
{
int space;
@ -861,6 +871,10 @@ void DEI3(void)
DTCR3 = last_dma_chunk_size & 0xffff;
SAR3 = (unsigned int)mp3buf + mp3buf_read;
id3tags[tag_read_idx]->id3.offset += last_dma_chunk_size;
/* Update the watermark debug level */
if(unplayed_space_left < lowest_watermark_level)
lowest_watermark_level = unplayed_space_left;
}
else
{
@ -870,6 +884,11 @@ void DEI3(void)
closed. */
if(mpeg_file >= 0)
{
/* Update the watermark debug level */
if(unplayed_space_left < lowest_watermark_level)
lowest_watermark_level = unplayed_space_left;
DEBUGF("DMA underrun.\n");
dma_underrun = true;
}
@ -883,10 +902,6 @@ void DEI3(void)
}
CHCR3 &= ~0x0001; /* Disable the DMA interrupt */
}
/* Update the watermark debug level */
if(unplayed_space_left < lowest_watermark_level)
lowest_watermark_level = unplayed_space_left;
}
CHCR3 &= ~0x0002; /* Clear DMA interrupt */
@ -1128,12 +1143,7 @@ static bool swap_one_chunk(void)
{
int free_space_left;
int amount_to_swap;
int playable_space;
playable_space = mp3buf_swapwrite - mp3buf_read;
if(playable_space < 0)
playable_space += mp3buflen;
free_space_left = get_unswapped_space();
if(free_space_left == 0 && !play_pending)
@ -1141,8 +1151,8 @@ static bool swap_one_chunk(void)
/* Swap in larger chunks when the user is waiting for the playback
to start, or when there is dangerously little playable data left */
if(play_pending || playable_space < MPEG_LOW_WATER_CHUNKSIZE)
amount_to_swap = MIN(MPEG_LOW_WATER_CHUNKSIZE, free_space_left);
if(play_pending || get_playable_space() < MPEG_LOW_WATER_SWAP_CHUNKSIZE)
amount_to_swap = MIN(MPEG_LOW_WATER_SWAP_CHUNKSIZE, free_space_left);
else
amount_to_swap = MIN(MPEG_SWAP_CHUNKSIZE, free_space_left);