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-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,