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-rw-r--r--src/pcm_byteswap.c26
-rw-r--r--src/pcm_byteswap.h17
2 files changed, 43 insertions, 0 deletions
diff --git a/src/pcm_byteswap.c b/src/pcm_byteswap.c
index 4e604c79a..63f116211 100644
--- a/src/pcm_byteswap.c
+++ b/src/pcm_byteswap.c
@@ -68,3 +68,29 @@ const int32_t *pcm_byteswap_32(struct pcm_buffer *buffer,
return buf;
}
+
+const void *
+pcm_byteswap(struct pcm_buffer *buffer, enum sample_format format,
+ const void *src, size_t size)
+{
+ switch (format) {
+ case SAMPLE_FORMAT_UNDEFINED:
+ case SAMPLE_FORMAT_S24:
+ /* not implemented */
+ return NULL;
+
+ case SAMPLE_FORMAT_S8:
+ return src;
+
+ case SAMPLE_FORMAT_S16:
+ return pcm_byteswap_16(buffer, src, size);
+
+ case SAMPLE_FORMAT_S24_P32:
+ case SAMPLE_FORMAT_S32:
+ return pcm_byteswap_32(buffer, src, size);
+ }
+
+ /* unreachable */
+ assert(false);
+ return NULL;
+}
diff --git a/src/pcm_byteswap.h b/src/pcm_byteswap.h
index 1098a2fe1..0836a2512 100644
--- a/src/pcm_byteswap.h
+++ b/src/pcm_byteswap.h
@@ -20,6 +20,8 @@
#ifndef MPD_PCM_BYTESWAP_H
#define MPD_PCM_BYTESWAP_H
+#include "audio_format.h"
+
#include <stdint.h>
#include <stddef.h>
@@ -47,4 +49,19 @@ const int16_t *pcm_byteswap_16(struct pcm_buffer *buffer,
const int32_t *pcm_byteswap_32(struct pcm_buffer *buffer,
const int32_t *src, size_t len);
+/**
+ * Changes the endianness of PCM data.
+ *
+ * @param buffer the destination pcm_buffer object
+ * @param format the sample format (both input and output)
+ * @param src the source PCM buffer
+ * @param src_size the number of bytes in #src
+ * @return the destination buffer, or NULL if the sample format is not
+ * supported
+ */
+G_GNUC_MALLOC
+const void *
+pcm_byteswap(struct pcm_buffer *buffer, enum sample_format format,
+ const void *src, size_t size);
+
#endif