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virtual-surround: Add silence to hrir if necessary.

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Otherwise, the hrir might be too short to get completely resampled

v2: take different sample rates into account
This commit is contained in:
Niels Ole Salscheider 2012-10-05 21:46:48 +02:00 • committed by Tanu Kaskinen
parent e98f748573
commit e32a408b3c
1 changed files with 38 additions and 9 deletions
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47
src/modules/module-virtual-surround-sink.c
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@ -550,10 +550,13 @@ int pa__init(pa_module*m) {
pa_channel_map hrir_map;
pa_sample_spec hrir_temp_ss;
pa_memchunk hrir_temp_chunk;
pa_memchunk hrir_temp_chunk, hrir_temp_chunk_resampled;
pa_resampler *resampler;
size_t hrir_copied_length, hrir_total_length;
hrir_temp_chunk.memblock = NULL;
hrir_temp_chunk_resampled.memblock = NULL;
pa_assert(m);
@ -719,17 +722,40 @@ int pa__init(pa_module*m) {
/* resample hrir */
resampler = pa_resampler_new(u->sink->core->mempool, &hrir_temp_ss, &hrir_map, &hrir_ss, &hrir_map,
PA_RESAMPLER_SRC_SINC_BEST_QUALITY, PA_RESAMPLER_NO_REMAP);
pa_resampler_run(resampler, &hrir_temp_chunk, &hrir_temp_chunk);
pa_resampler_free(resampler);
u->hrir_samples = hrir_temp_chunk.length / pa_frame_size(&hrir_ss);
u->hrir_samples = hrir_temp_chunk.length / pa_frame_size(&hrir_temp_ss) * hrir_ss.rate / hrir_temp_ss.rate;
hrir_total_length = u->hrir_samples * pa_frame_size(&hrir_ss);
u->hrir_channels = hrir_ss.channels;
/* copy hrir data */
hrir_data = (float *) pa_memblock_acquire(hrir_temp_chunk.memblock);
u->hrir_data = (float *) pa_xmalloc(hrir_temp_chunk.length);
memcpy(u->hrir_data, hrir_data, hrir_temp_chunk.length);
pa_memblock_release(hrir_temp_chunk.memblock);
u->hrir_data = (float *) pa_xmalloc(hrir_total_length);
hrir_copied_length = 0;
/* add silence to the hrir until we get enough samples out of the resampler */
while (hrir_copied_length < hrir_total_length) {
pa_resampler_run(resampler, &hrir_temp_chunk, &hrir_temp_chunk_resampled);
/* Silence input block */
pa_silence_memblock(hrir_temp_chunk.memblock, &hrir_temp_ss);
if (hrir_temp_chunk_resampled.memblock) {
/* Copy hrir data */
hrir_data = (float *) pa_memblock_acquire(hrir_temp_chunk_resampled.memblock);
if (hrir_total_length - hrir_copied_length >= hrir_temp_chunk_resampled.length) {
memcpy(u->hrir_data + hrir_copied_length, hrir_data, hrir_temp_chunk_resampled.length);
hrir_copied_length += hrir_temp_chunk_resampled.length;
} else {
memcpy(u->hrir_data + hrir_copied_length, hrir_data, hrir_total_length - hrir_copied_length);
hrir_copied_length = hrir_total_length;
}
pa_memblock_release(hrir_temp_chunk_resampled.memblock);
pa_memblock_unref(hrir_temp_chunk_resampled.memblock);
hrir_temp_chunk_resampled.memblock = NULL;
}
}
pa_resampler_free(resampler);
pa_memblock_unref(hrir_temp_chunk.memblock);
hrir_temp_chunk.memblock = NULL;
@ -797,6 +823,9 @@ fail:
if (hrir_temp_chunk.memblock)
pa_memblock_unref(hrir_temp_chunk.memblock);
if (hrir_temp_chunk_resampled.memblock)
pa_memblock_unref(hrir_temp_chunk_resampled.memblock);
if (ma)
pa_modargs_free(ma);