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authorMax Kellermann <max@duempel.org>2011-10-08 18:19:43 +0200
committerMax Kellermann <max@duempel.org>2011-10-20 02:55:05 +0200
commit42e248a8da0f2043e752166d4a34615c850384ec (patch)
tree4ddc2a8d349fd28dd1529900c83437aa57fc9033 /src/pcm_convert.c
parente71a652985768e5f4ad78f23786dff08081214db (diff)
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pcm_convert: add function pcm_convert_channels()
For future internal use.
Diffstat (limited to 'src/pcm_convert.c')
-rw-r--r--src/pcm_convert.c50
1 files changed, 50 insertions, 0 deletions
diff --git a/src/pcm_convert.c b/src/pcm_convert.c
index c145e437a..58137fd0e 100644
--- a/src/pcm_convert.c
+++ b/src/pcm_convert.c
@@ -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,