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corrections in the last changes.

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samples are exapnded properly in linear interpolation now.
This commit is contained in:
Takashi Iwai 2003-09-10 11:02:57 +00:00
parent 60585e25fc
commit 1adfe9fd0d
1 changed files with 17 additions and 12 deletions
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29
src/pcm/pcm_rate.c
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@ -126,29 +126,25 @@ static snd_pcm_uframes_t snd_pcm_rate_expand(const snd_pcm_channel_area_t *dst_a
dst_step = snd_pcm_channel_area_step(dst_area);
src_frames1 = 0;
dst_frames1 = 0;
if (states->init) {
if (! states->init) {
sample = initial_sample(src, getidx);
src_frames1++;
states->init = 0;
old_sample = new_sample = sample;
goto put_sample;
src += src_step;
src_frames1++;
states->init = 2; /* get a new sample */
}
while (dst_frames1 < dst_frames && src_frames1 < src_frames) {
pos += DIV;
if (pos >= get_threshold) {
while (dst_frames1 < dst_frames) {
if (states->init == 2) {
old_sample = new_sample;
pos -= get_threshold;
goto *get;
#define GET16_END after_get
#include "plugin_ops.h"
#undef GET16_END
after_get:
new_sample = sample;
src += src_step;
src_frames1++;
states->init = 1;
}
sample = (((int64_t)old_sample * (int64_t)(get_threshold - pos)) + ((int64_t)new_sample * pos)) / get_threshold;
put_sample:
goto *put;
#define PUT16_END after_put
#include "plugin_ops.h"
@ -156,7 +152,16 @@ static snd_pcm_uframes_t snd_pcm_rate_expand(const snd_pcm_channel_area_t *dst_a
after_put:
dst += dst_step;
dst_frames1++;
}
pos += DIV;
if (pos >= get_threshold) {
pos -= get_threshold;
src += src_step;
src_frames1++;
states->init = 2; /* get a new sample */
if (src_frames1 >= src_frames)
break;
}
}
states->old_sample = old_sample;
states->new_sample = new_sample;
states->pos = pos;