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pcm_convert: add function pcm_convert_channels()

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For future internal use.
This commit is contained in:
Max Kellermann 2011-10-08 18:19:43 +02:00
parent e71a652985
commit 42e248a8da
1 changed files with 50 additions and 0 deletions
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50
src/pcm_convert.c
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@ -56,6 +56,56 @@ void pcm_convert_deinit(struct pcm_convert_state *state)
pcm_buffer_deinit(&state->byteswap_buffer);
}
G_GNUC_UNUSED
static const void *
pcm_convert_channels(struct pcm_buffer *buffer, enum sample_format format,
uint8_t dest_channels,
uint8_t src_channels, const void *src,
size_t src_size, size_t *dest_size_r,
GError **error_r)
{
const void *dest = NULL;
switch (format) {
case SAMPLE_FORMAT_UNDEFINED:
case SAMPLE_FORMAT_S8:
case SAMPLE_FORMAT_S24:
case SAMPLE_FORMAT_FLOAT:
g_set_error(error_r, pcm_convert_quark(), 0,
"Channel conversion not implemented for format '%s'",
sample_format_to_string(format));
return NULL;
case SAMPLE_FORMAT_S16:
dest = pcm_convert_channels_16(buffer, dest_channels,
src_channels, src,
src_size, dest_size_r);
break;
case SAMPLE_FORMAT_S24_P32:
dest = pcm_convert_channels_24(buffer, dest_channels,
src_channels, src,
src_size, dest_size_r);
break;
case SAMPLE_FORMAT_S32:
dest = pcm_convert_channels_32(buffer, dest_channels,
src_channels, src,
src_size, dest_size_r);
break;
}
if (dest == NULL) {
g_set_error(error_r, pcm_convert_quark(), 0,
"Conversion from %u to %u channels "
"is not implemented",
src_channels, dest_channels);
return NULL;
}
return dest;
}
static const int16_t *
pcm_convert_16(struct pcm_convert_state *state,
const struct audio_format *src_format,