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make streams work in chunks of 256 samples (won't work so well for non power

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of 2 resample rates :/)
This commit is contained in:
Bill Currie 2003-04-20 03:42:19 +00:00
parent e4ba0ad5e5
commit 52f41f8095
4 changed files with 10 additions and 2 deletions
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1
include/snd_render.h
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@ -68,6 +68,7 @@ typedef struct sfxstream_s {
sfx_t *sfx;
void *file;
wavinfo_t wavinfo;
int pos;
void (*resample)(sfxbuffer_t *, byte *, int, void *);
int (*read)(void *file, byte *data, int bytes, wavinfo_t *info);
int (*seek)(void *file, int pos, wavinfo_t *info);

7
libs/audio/renderer/snd_mem.c
View file

@ -157,6 +157,11 @@ SND_StreamAdvance (sfxbuffer_t *buffer, unsigned int count)
wavinfo_t *info = &stream->wavinfo;
void *prev;
stream->pos += count;
count = (stream->pos - buffer->pos) & ~255;
if (!count)
return;
stepscale = (float) info->rate / shm->speed; // usually 0.5, 1, or 2
// find out how many samples the buffer currently holds
@ -185,6 +190,7 @@ SND_StreamAdvance (sfxbuffer_t *buffer, unsigned int count)
buffer->pos %= sfx->length - sfx->loopstart;
buffer->pos += sfx->loopstart;
}
stream->pos = buffer->pos;
}
headpos = buffer->pos;
stream->seek (stream->file, buffer->pos * stepscale, info);
@ -200,6 +206,7 @@ SND_StreamAdvance (sfxbuffer_t *buffer, unsigned int count)
} else {
buffer->pos -= sfx->length - sfx->loopstart;
}
stream->pos = buffer->pos;
}
buffer->tail += count;

2
libs/audio/renderer/vorbis.c
View file

@ -248,7 +248,7 @@ vorbis_stream (sfx_t *sfx, char *realname, OggVorbis_File *vf, wavinfo_t info)
int size;
samples = shm->speed * 0.3;
size = samples = (samples + 3) & ~3;
size = samples = (samples + 255) & ~255;
if (!snd_loadas8bit->int_val)
size *= 2;
if (info.channels == 2)

2
libs/audio/renderer/wav.c
View file

@ -119,7 +119,7 @@ wav_stream (sfx_t *sfx, char *realname, void *file, wavinfo_t info)
int size;
samples = shm->speed * 0.3;
size = samples = (samples + 3) & ~3;
size = samples = (samples + 255) & ~255;
if (!snd_loadas8bit->int_val)
size *= 2;
if (info.channels == 2)