const void *
pcm_convert(struct pcm_convert_state *state,
const struct audio_format *src_format,
const void *src, size_t src_size,
const struct audio_format *dest_format,
size_t *dest_size_r,
GError **error_r)
{
switch (dest_format->format) {
case SAMPLE_FORMAT_S16:
return pcm_convert_16(state,
src_format, src, src_size,
dest_format, dest_size_r,
error_r);
case SAMPLE_FORMAT_S24:
return pcm_convert_24_packed(state,
src_format, src, src_size,
dest_format, dest_size_r,
error_r);
case SAMPLE_FORMAT_S24_P32:
return pcm_convert_24(state,
src_format, src, src_size,
dest_format, dest_size_r,
error_r);
case SAMPLE_FORMAT_S32:
return pcm_convert_32(state,
src_format, src, src_size,
dest_format, dest_size_r,
error_r);
default:
g_set_error(error_r, pcm_convert_quark(), 0,
"PCM conversion to %s is not implemented",
sample_format_to_string(dest_format->format));
return NULL;
}
}
const void *
pcm_convert(struct pcm_convert_state *state,
const struct audio_format *src_format,
const void *src, size_t src_size,
const struct audio_format *dest_format,
size_t *dest_size_r,
GError **error_r)
{
if (src_format->reverse_endian) {
/* convert to host byte order, because all of our
conversion libraries assume host byte order */
src = pcm_byteswap(&state->byteswap_buffer, src_format->format,
src, src_size);
if (src == NULL) {
g_set_error(error_r, pcm_convert_quark(), 0,
"PCM byte order change of format '%s' is not implemented",
sample_format_to_string(src_format->format));
return NULL;
}
}
struct audio_format float_format;
if (src_format->format == SAMPLE_FORMAT_DSD ||
src_format->format == SAMPLE_FORMAT_DSD_LSBFIRST) {
size_t f_size;
const bool lsbfirst =
src_format->format == SAMPLE_FORMAT_DSD_LSBFIRST;
const float *f = pcm_dsd_to_float(&state->dsd,
src_format->channels,
lsbfirst, src, src_size,
&f_size);
if (f == NULL) {
g_set_error_literal(error_r, pcm_convert_quark(), 0,
"DSD to PCM conversion failed");
return NULL;
}
float_format = *src_format;
float_format.format = SAMPLE_FORMAT_FLOAT;
src_format = &float_format;
src = f;
src_size = f_size;
}
switch (dest_format->format) {
case SAMPLE_FORMAT_S16:
return pcm_convert_16(state,
src_format, src, src_size,
dest_format, dest_size_r,
error_r);
case SAMPLE_FORMAT_S24:
return pcm_convert_24_packed(state,
src_format, src, src_size,
dest_format, dest_size_r,
error_r);
case SAMPLE_FORMAT_S24_P32:
return pcm_convert_24(state,
src_format, src, src_size,
dest_format, dest_size_r,
error_r);
case SAMPLE_FORMAT_S32:
return pcm_convert_32(state,
src_format, src, src_size,
dest_format, dest_size_r,
error_r);
case SAMPLE_FORMAT_FLOAT:
return pcm_convert_float(state,
src_format, src, src_size,
dest_format, dest_size_r,
error_r);
default:
g_set_error(error_r, pcm_convert_quark(), 0,
"PCM conversion to %s is not implemented",
sample_format_to_string(dest_format->format));
return NULL;
}
}