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(pa_format_info *f, pa_sample_spec *ss, pa_channel_map *map) {
char *sf = NULL, *m = NULL;
int rate, channels;
int ret = -PA_ERR_INVALID;
pa_assert(f);
pa_assert(ss);
if (!pa_format_info_is_pcm(f))
return pa_format_info_to_sample_spec_fake(f, ss);
if (pa_format_info_get_prop_string(f, PA_PROP_FORMAT_SAMPLE_FORMAT, &sf))
goto out;
if (pa_format_info_get_prop_int(f, PA_PROP_FORMAT_RATE, &rate))
goto out;
if (pa_format_info_get_prop_int(f, PA_PROP_FORMAT_CHANNELS, &channels))
goto out;
if ((ss->format = pa_parse_sample_format(sf)) == PA_SAMPLE_INVALID)
goto out;
ss->rate = (uint32_t) rate;
ss->channels = (uint8_t) channels;
if (map) {
pa_channel_map_init(map);
if (pa_format_info_get_prop_string(f, PA_PROP_FORMAT_CHANNEL_MAP, &m) == 0)
if (pa_channel_map_parse(map, m) == NULL)
goto out;
}
ret = 0;
out:
if (sf)
pa_xfree(sf);
if (m)
pa_xfree(m);
return ret;
}
/* For PCM streams */
pa_bool_t pa_format_info_to_sample_spec(pa_format_info *f, pa_sample_spec *ss, pa_channel_map *map) {
char *sf = NULL, *m = NULL;
int rate, channels;
pa_bool_t ret = FALSE;
pa_assert(f);
pa_assert(ss);
pa_return_val_if_fail(f->encoding == PA_ENCODING_PCM, FALSE);
if (!pa_format_info_get_prop_string(f, PA_PROP_FORMAT_SAMPLE_FORMAT, &sf))
goto out;
if (!pa_format_info_get_prop_int(f, PA_PROP_FORMAT_RATE, &rate))
goto out;
if (!pa_format_info_get_prop_int(f, PA_PROP_FORMAT_CHANNELS, &channels))
goto out;
if ((ss->format = pa_parse_sample_format(sf)) == PA_SAMPLE_INVALID)
goto out;
ss->rate = (uint32_t) rate;
ss->channels = (uint8_t) channels;
if (map) {
pa_channel_map_init(map);
if (pa_format_info_get_prop_string(f, PA_PROP_FORMAT_CHANNEL_MAP, &m))
if (pa_channel_map_parse(map, m) == NULL)
goto out;
}
ret = TRUE;
out:
if (sf)
pa_xfree(sf);
if (m)
pa_xfree(m);
return ret;
}
/* For compressed streams */
pa_bool_t pa_format_info_to_sample_spec_fake(pa_format_info *f, pa_sample_spec *ss) {
int rate;
pa_assert(f);
pa_assert(ss);
pa_return_val_if_fail(f->encoding != PA_ENCODING_PCM, FALSE);
ss->format = PA_SAMPLE_S16LE;
ss->channels = 2;
pa_return_val_if_fail(pa_format_info_get_prop_int(f, PA_PROP_FORMAT_RATE, &rate), FALSE);
ss->rate = (uint32_t) rate;
if (f->encoding == PA_ENCODING_EAC3_IEC61937)
ss->rate *= 4;
return TRUE;
}
/* For compressed streams */
static int pa_format_info_to_sample_spec_fake(pa_format_info *f, pa_sample_spec *ss) {
int rate;
pa_assert(f);
pa_assert(ss);
/* Note: When we add support for non-IEC61937 encapsulated compressed
* formats, this function should return a non-zero values for these. */
ss->format = PA_SAMPLE_S16LE;
ss->channels = 2;
pa_return_val_if_fail(pa_format_info_get_prop_int(f, PA_PROP_FORMAT_RATE, &rate) == 0, -PA_ERR_INVALID);
ss->rate = (uint32_t) rate;
if (f->encoding == PA_ENCODING_EAC3_IEC61937)
ss->rate *= 4;
return 0;
}
