void pa_transcode_init(pa_transcode *transcode, pa_encoding_t encoding, pa_transcode_flags_t flags, pa_format_info *transcode_format_info, pa_sample_spec *transcode_sink_spec) {
pa_assert((flags & PA_TRANSCODE_DECODER) || (flags & PA_TRANSCODE_ENCODER));
transcode->flags = flags;
transcode->encoding = encoding;
switch(encoding) {
#ifdef HAVE_OPUS
case PA_ENCODING_OPUS:
transcode->sample_size = OPUS_DEFAULT_SAMPLE_SIZE;
if(flags & PA_TRANSCODE_DECODER) {
if(pa_format_info_get_prop_int(transcode_format_info, "max_frame_size", (int *)&transcode->max_frame_size) != 0)
transcode->max_frame_size = OPUS_DEFAULT_FRAME_SIZE;
if(pa_format_info_get_prop_int(transcode_format_info, "frame_size", (int *)&transcode->frame_size) != 0)
transcode->frame_size = OPUS_DEFAULT_FRAME_SIZE;
if(pa_format_info_get_prop_int(transcode_format_info, "bitrate", (int *)&transcode->bitrate) != 0)
transcode->bitrate = OPUS_DEFAULT_BITRATE;
pa_format_info_get_rate(transcode_format_info, &transcode->rate);
pa_format_info_get_channels(transcode_format_info, &transcode->channels);
transcode->decoder = tc_opus_create_decoder(transcode->rate, transcode->channels);
}
else {
if(transcode->bitrate == 0)
transcode->bitrate = OPUS_DEFAULT_BITRATE;
if(transcode->frame_size == 0)
transcode->frame_size = OPUS_DEFAULT_FRAME_SIZE;
transcode->channels = transcode_sink_spec->channels;
transcode->rate = OPUS_DEFAULT_SAMPLE_RATE;
transcode->encoder = tc_opus_create_encoder(transcode->rate, transcode->channels, transcode->bitrate);
transcode_sink_spec->rate = transcode->rate;
transcode_sink_spec->format = PA_SAMPLE_S16LE;
}
break;
#endif
default:
transcode->decoder = NULL;
transcode->encoder = NULL;
}
}
/* For PCM streams */
int pa_format_info_to_sample_spec(const pa_format_info *f, pa_sample_spec *ss, pa_channel_map *map) {
pa_assert(f);
pa_assert(ss);
if (!pa_format_info_is_pcm(f))
return pa_format_info_to_sample_spec_fake(f, ss, map);
if (pa_format_info_get_sample_format(f, &ss->format) < 0)
return -PA_ERR_INVALID;
if (pa_format_info_get_rate(f, &ss->rate) < 0)
return -PA_ERR_INVALID;
if (pa_format_info_get_channels(f, &ss->channels) < 0)
return -PA_ERR_INVALID;
if (map && pa_format_info_get_channel_map(f, map) < 0)
return -PA_ERR_INVALID;
return 0;
}
