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resample: add functions to calculate in/out length

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Add test for this as well
This commit is contained in:
Wim Taymans 2019-07-08 18:26:08 +02:00
parent 0154e6eaac
commit a6a7b3ab54
3 changed files with 76 additions and 0 deletions
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14
spa/plugins/audioconvert/resample-native.h
View file

@ -134,6 +134,19 @@ static void impl_native_update_rate(struct resample *r, double rate)
}
}
static uint32_t impl_native_in_len(struct resample *r, uint32_t out_len)
{
struct native_data *data = r->data; \
uint32_t in_len;
in_len = (data->phase + out_len * data->frac) / data->out_rate;
in_len += out_len * data->inc + (data->n_taps - data->hist);
spa_log_trace_fp(r->log, "native %p: hist:%d %d->%d", r, data->hist, out_len, in_len);
return in_len;
}
static void impl_native_process(struct resample *r,
const void * SPA_RESTRICT src[], uint32_t *in_len,
void * SPA_RESTRICT dst[], uint32_t *out_len)
@ -245,6 +258,7 @@ static int impl_native_init(struct resample *r)
r->free = impl_native_free;
r->update_rate = impl_native_update_rate;
r->in_len = impl_native_in_len;
r->process = impl_native_process;
r->reset = impl_native_reset;
r->delay = impl_native_delay;

4
spa/plugins/audioconvert/resample.h
View file

@ -38,6 +38,8 @@ struct resample {
void (*free) (struct resample *r);
void (*update_rate) (struct resample *r, double rate);
uint32_t (*in_len) (struct resample *r, uint32_t out_len);
uint32_t (*out_len) (struct resample *r, uint32_t in_len);
void (*process) (struct resample *r,
const void * SPA_RESTRICT src[], uint32_t *in_len,
void * SPA_RESTRICT dst[], uint32_t *out_len);
@ -48,6 +50,8 @@ struct resample {
#define resample_free(r) (r)->free(r)
#define resample_update_rate(r,...) (r)->update_rate(r,__VA_ARGS__)
#define resample_in_len(r,...) (r)->in_len(r,__VA_ARGS__)
#define resample_out_len(r,...) (r)->out_len(r,__VA_ARGS__)
#define resample_process(r,...) (r)->process(r,__VA_ARGS__)
#define resample_reset(r) (r)->reset(r)
#define resample_delay(r) (r)->delay(r)

58
spa/plugins/audioconvert/test-resample.c
View file

@ -81,9 +81,67 @@ static void test_native(void)
feed_1(&r);
}
static void pull_blocks(struct resample *r, uint32_t size)
{
uint32_t i;
float in[size];
float out[size];
const void *src[1];
void *dst[1];
uint32_t in_len, out_len;
uint32_t pin_len, pout_len;
src[0] = in;
dst[0] = out;
for (i = 0; i < 500; i++) {
pout_len = out_len = size;
pin_len = in_len = resample_in_len(r, out_len);
resample_process(r, src, &pin_len, dst, &pout_len);
fprintf(stderr, "%d: %d %d %d %d %d\n", i,
in_len, pin_len, out_len, pout_len,
resample_in_len(r, size));
spa_assert(in_len == pin_len + resample_delay(r));
spa_assert(out_len == pout_len);
}
}
static void test_in_len(void)
{
struct resample r;
spa_zero(r);
r.channels = 1;
r.i_rate = 32000;
r.o_rate = 48000;
impl_native_init(&r);
pull_blocks(&r, 1024);
spa_zero(r);
r.channels = 1;
r.i_rate = 44100;
r.o_rate = 48000;
impl_native_init(&r);
pull_blocks(&r, 1024);
spa_zero(r);
r.channels = 1;
r.i_rate = 48000;
r.o_rate = 44100;
impl_native_init(&r);
pull_blocks(&r, 1024);
}
int main(int argc, char *argv[])
{
test_native();
test_in_len();
return 0;
}