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resample: fix start position of new samples

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When we finished processing the history it might be possible that we
need to skip some samples from the input. Implement this by adding
a start offset for the samples in the buffer.
This commit is contained in:
Wim Taymans 2020-02-13 16:43:06 +01:00
parent 0a26c478f7
commit 761119f640
2 changed files with 19 additions and 17 deletions
Download patch file Download diff file Expand all files Collapse all files

29
spa/plugins/audioconvert/resample-native-impl.h
View file

@ -29,8 +29,8 @@
#include "resample.h"
typedef void (*resample_func_t)(struct resample *r,
const void * SPA_RESTRICT src[], uint32_t *in_len,
void * SPA_RESTRICT dst[], uint32_t offs, uint32_t *out_len);
const void * SPA_RESTRICT src[], uint32_t ioffs, uint32_t *in_len,
void * SPA_RESTRICT dst[], uint32_t ooffs, uint32_t *out_len);
struct native_data {
double rate;
@ -52,8 +52,8 @@ struct native_data {
#define DEFINE_RESAMPLER(type,arch) \
void do_resample_##type##_##arch(struct resample *r, \
const void * SPA_RESTRICT src[], uint32_t *in_len, \
void * SPA_RESTRICT dst[], uint32_t offs, uint32_t *out_len)
const void * SPA_RESTRICT src[], uint32_t ioffs, uint32_t *in_len, \
void * SPA_RESTRICT dst[], uint32_t ooffs, uint32_t *out_len)
#define MAKE_RESAMPLER_COPY(arch) \
DEFINE_RESAMPLER(copy,arch) \
@ -65,21 +65,21 @@ DEFINE_RESAMPLER(copy,arch) \
if (r->channels == 0) \
return; \
\
index = 0; \
if (offs < olen && index + n_taps <= ilen) { \
uint32_t to_copy = SPA_MIN(olen - offs, \
index = ioffs; \
if (ooffs < olen && index + n_taps <= ilen) { \
uint32_t to_copy = SPA_MIN(olen - ooffs, \
ilen - (index + n_taps) + 1); \
for (c = 0; c < r->channels; c++) { \
const float *s = src[c]; \
float *d = dst[c]; \
spa_memcpy(&d[offs], &s[index + n_taps2], \
spa_memcpy(&d[ooffs], &s[index + n_taps2], \
to_copy * sizeof(float)); \
} \
index += to_copy; \
offs += to_copy; \
ooffs += to_copy; \
} \
*in_len = index; \
*out_len = offs; \
*out_len = ooffs; \
}
#define MAKE_RESAMPLER_FULL(arch) \
@ -90,6 +90,7 @@ DEFINE_RESAMPLER(full,arch) \
uint32_t index, phase, n_phases = data->out_rate; \
uint32_t c, o, olen = *out_len, ilen = *in_len; \
uint32_t inc = data->inc, frac = data->frac; \
static int cnt = 0; \
\
if (r->channels == 0) \
return; \
@ -98,10 +99,10 @@ DEFINE_RESAMPLER(full,arch) \
const float *s = src[c]; \
float *d = dst[c]; \
\
index = 0; \
index = ioffs; \
phase = data->phase; \
\
for (o = offs; o < olen && index + n_taps <= ilen; o++) { \
for (o = ooffs; o < olen && index + n_taps <= ilen; o++) { \
const float *ip, *taps; \
\
ip = &s[index]; \
@ -137,10 +138,10 @@ DEFINE_RESAMPLER(inter,arch) \
const float *s = src[c]; \
float *d = dst[c]; \
\
index = 0; \
index = ioffs; \
phase = data->phase; \
\
for (o = offs; o < olen && index + n_taps <= ilen; o++) { \
for (o = ooffs; o < olen && index + n_taps <= ilen; o++) { \
const float *ip, *t0, *t1; \
float ph, x; \
uint32_t offset; \

7
spa/plugins/audioconvert/resample-native.h
View file

@ -184,7 +184,7 @@ static void impl_native_process(struct resample *r,
* and we try to process it */
in = hist + refill;
out = *out_len;
data->func(r, (const void**)history, &in, dst, 0, &out);
data->func(r, (const void**)history, 0, &in, dst, 0, &out);
spa_log_trace_fp(r->log, "native %p: in:%d/%d out %d/%d hist:%d",
r, hist + refill, in, *out_len, out, hist);
} else {
@ -192,10 +192,11 @@ static void impl_native_process(struct resample *r,
}
if (in >= hist) {
int skip = in - hist;
/* we are past the history and can now work on the new
* input data */
in = *in_len;
data->func(r, src, &in, dst, out, out_len);
in = *in_len - skip;
data->func(r, src, skip, &in, dst, out, out_len);
spa_log_trace_fp(r->log, "native %p: in:%d/%d out %d/%d",
r, *in_len, in, *out_len, out);