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snd_dma.c fixes for non-power-of-two values. From Jacob Meuser.

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This commit is contained in:
Antti Harri 2011-06-04 09:47:15 +03:00
parent 67c7796c0b
commit 8d1bd58ade
1 changed files with 11 additions and 7 deletions
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18
libs/audio/renderer/snd_dma.c
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@ -75,14 +75,16 @@ static snd_output_funcs_t *snd_output_funcs;
static void
s_xfer_paint_buffer (int endtime)
{
int count, out_idx, out_mask, step, val;
int count, out_idx, out_max, step, val;
float snd_vol;
float *p;
p = (float *) snd_paintbuffer;
count = (endtime - snd_paintedtime) * snd_shm->channels;
out_mask = (snd_shm->frames * snd_shm->channels) - 1;
out_idx = (snd_paintedtime * snd_shm->channels) & out_mask;
out_max = (snd_shm->frames * snd_shm->channels) - 1;
out_idx = snd_paintedtime * snd_shm->channels;
while (out_idx > out_max)
out_idx -= out_max + 1;
step = 3 - snd_shm->channels;
snd_vol = snd_volume->value;
@ -96,8 +98,9 @@ s_xfer_paint_buffer (int endtime)
val = 0x7fff;
else if (val < -0x8000)
val = -0x8000;
out[out_idx] = val;
out_idx = (out_idx + 1) & out_mask;
out[out_idx++] = val;
if (out_idx > out_max)
out_idx = 0;
}
} else if (snd_shm->samplebits == 8) {
unsigned char *out = (unsigned char *) snd_shm->buffer;
@ -109,8 +112,9 @@ s_xfer_paint_buffer (int endtime)
val = 0x7f;
else if (val < -0x80)
val = -0x80;
out[out_idx] = val + 0x80;
out_idx = (out_idx + 1) & out_mask;
out[out_idx++] = val + 0x80;
if (out_idx > out_max)
out_idx = 0;
}
}
}