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Faster start of playback

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@2953 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Linus Nielsen Feltzing 2002-12-05 17:14:35 +00:00
parent 9367862246
commit 7fed4a0f35
2 changed files with 12 additions and 4 deletions
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14
firmware/mpeg.c
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@ -1124,7 +1124,7 @@ static void start_playback_if_ready(void)
/* If the filling has stopped, and we still haven't reached
the watermark, the file must be smaller than the
watermark. We must still play it. */
if((playable_space >= low_watermark) ||
if((playable_space >= MPEG_PLAY_PENDING_THRESHOLD) ||
!filling || dma_underrun)
{
DEBUGF("P\n");
@ -1159,10 +1159,16 @@ 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 || get_playable_space() < MPEG_LOW_WATER_SWAP_CHUNKSIZE)
amount_to_swap = MIN(MPEG_LOW_WATER_SWAP_CHUNKSIZE, free_space_left);
if(play_pending)
amount_to_swap = MIN(MPEG_PLAY_PENDING_SWAPSIZE, free_space_left);
else
amount_to_swap = MIN(MPEG_SWAP_CHUNKSIZE, free_space_left);
{
if(get_playable_space() < low_watermark)
amount_to_swap = MIN(MPEG_LOW_WATER_SWAP_CHUNKSIZE,
free_space_left);
else
amount_to_swap = MIN(MPEG_SWAP_CHUNKSIZE, free_space_left);
}
if(mp3buf_write < mp3buf_swapwrite)
amount_to_swap = MIN(mp3buflen - mp3buf_swapwrite,

2
firmware/mpeg.h
View file

@ -28,6 +28,8 @@
#define MPEG_LOW_WATER 0x60000
#define MPEG_LOW_WATER_CHUNKSIZE 0x40000
#define MPEG_LOW_WATER_SWAP_CHUNKSIZE 0x10000
#define MPEG_PLAY_PENDING_THRESHOLD 0x10000
#define MPEG_PLAY_PENDING_SWAPSIZE 0x10000
struct mpeg_debug
{