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resampler: Handle leftover samples, use new return value

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Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
This commit is contained in:
Peter Meerwald 2013-07-21 23:14:41 +02:00 • committed by Tanu Kaskinen
parent 79b237ca02
commit 53104b36e6
1 changed files with 37 additions and 44 deletions
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81
src/pulsecore/resampler.c
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@ -1243,9 +1243,36 @@ static pa_memchunk *remap_channels(pa_resampler *r, pa_memchunk *input) {
return &r->remap_buf;
}
static void save_leftover(pa_resampler *r, void *buf, size_t len) {
void *dst;
pa_assert(r);
pa_assert(buf);
pa_assert(len > 0);
/* Store the leftover to remap_buf. */
r->remap_buf.length = len;
if (!r->remap_buf.memblock || r->remap_buf_size < r->remap_buf.length) {
if (r->remap_buf.memblock)
pa_memblock_unref(r->remap_buf.memblock);
r->remap_buf_size = r->remap_buf.length;
r->remap_buf.memblock = pa_memblock_new(r->mempool, r->remap_buf.length);
}
dst = pa_memblock_acquire(r->remap_buf.memblock);
memcpy(dst, buf, r->remap_buf.length);
pa_memblock_release(r->remap_buf.memblock);
r->remap_buf_contains_leftover_data = true;
}
static pa_memchunk *resample(pa_resampler *r, pa_memchunk *input) {
unsigned in_n_frames, in_n_samples;
unsigned out_n_frames, out_n_samples;
unsigned leftover_n_frames;
pa_assert(r);
pa_assert(input);
@ -1272,7 +1299,14 @@ static pa_memchunk *resample(pa_resampler *r, pa_memchunk *input) {
r->resample_buf.memblock = pa_memblock_new(r->mempool, r->resample_buf.length);
}
r->impl.resample(r, input, in_n_frames, &r->resample_buf, &out_n_frames);
leftover_n_frames = r->impl.resample(r, input, in_n_frames, &r->resample_buf, &out_n_frames);
if (leftover_n_frames > 0) {
void *leftover_data = (uint8_t *) pa_memblock_acquire_chunk(input) + (in_n_frames - leftover_n_frames) * r->w_fz;
save_leftover(r, leftover_data, leftover_n_frames * r->w_fz);
pa_memblock_release(input->memblock);
}
r->resample_buf.length = out_n_frames * r->w_fz;
return &r->resample_buf;
@ -1341,32 +1375,6 @@ void pa_resampler_run(pa_resampler *r, const pa_memchunk *in, pa_memchunk *out)
pa_memchunk_reset(out);
}
static void save_leftover(pa_resampler *r, void *buf, size_t len) {
void *dst;
pa_assert(r);
pa_assert(buf);
pa_assert(len > 0);
/* Store the leftover to remap_buf. */
r->remap_buf.length = len;
if (!r->remap_buf.memblock || r->remap_buf_size < r->remap_buf.length) {
if (r->remap_buf.memblock)
pa_memblock_unref(r->remap_buf.memblock);
r->remap_buf_size = r->remap_buf.length;
r->remap_buf.memblock = pa_memblock_new(r->mempool, r->remap_buf.length);
}
dst = pa_memblock_acquire(r->remap_buf.memblock);
memcpy(dst, buf, r->remap_buf.length);
pa_memblock_release(r->remap_buf.memblock);
r->remap_buf_contains_leftover_data = true;
}
/*** libsamplerate based implementation ***/
#ifdef HAVE_LIBSAMPLERATE
@ -1393,19 +1401,12 @@ static unsigned libsamplerate_resample(pa_resampler *r, const pa_memchunk *input
pa_assert_se(src_process(state, &data) == 0);
if (data.input_frames_used < in_n_frames) {
void *leftover_data = data.data_in + data.input_frames_used * r->work_channels;
size_t leftover_length = (in_n_frames - data.input_frames_used) * r->w_fz;
save_leftover(r, leftover_data, leftover_length);
}
pa_memblock_release(input->memblock);
pa_memblock_release(output->memblock);
*out_n_frames = (unsigned) data.output_frames_gen;
return 0;
return in_n_frames - data.input_frames_used;
}
static void libsamplerate_update_rates(pa_resampler *r) {
@ -1832,17 +1833,9 @@ static unsigned ffmpeg_resample(pa_resampler *r, const pa_memchunk *input, unsig
pa_memblock_unref(w);
}
if (previous_consumed_frames < (int) in_n_frames) {
void *leftover_data = (int16_t *) pa_memblock_acquire_chunk(input) + previous_consumed_frames * r->work_channels;
size_t leftover_length = (in_n_frames - previous_consumed_frames) * r->w_fz;
save_leftover(r, leftover_data, leftover_length);
pa_memblock_release(input->memblock);
}
*out_n_frames = used_frames;
return 0;
return in_n_frames - previous_consumed_frames;
}
static void ffmpeg_free(pa_resampler *r) {