1 files changed, 46 insertions, 0 deletions
diff --git a/include/xas/mixer.h b/include/xas/mixer.h
new file mode 100644
index 0000000..9fd77cb
--- /dev/null
+++ b/include/xas/mixer.h
@@ -0,0 +1,46 @@
+#ifndef _XAS_MIXER_H
+#define _XAS_MIXER_H
+
+#include <sys/types.h>
+
+#include <xas/audio.h>
+
+typedef struct _xas_mixer_input {
+    xas_audio_stream *stream;
+
+    float gain,
+          bias_l,
+          bias_r;
+
+    struct _xas_mixer_input *next;
+} xas_mixer_input;
+
+typedef struct _xas_mixer {
+    xas_mixer_input *inputs,
+                      *last;
+
+    xas_audio_stream *output;
+
+    void *buf;
+    size_t buffer_size;
+} xas_mixer;
+
+xas_mixer *xas_mixer_new(size_t sample_size,
+                             size_t sample_rate,
+                             size_t channels,
+                             size_t buffer_size);
+
+void xas_mixer_destroy(xas_mixer *mixer);
+
+xas_audio_stream *xas_mixer_output(xas_mixer *mixer);
+
+xas_mixer_input *xas_mixer_input_add(xas_mixer *mixer,
+                                         xas_audio_stream *stream,
+                                         float gain,
+                                         float pan);
+
+void xas_mixer_input_set_gain(xas_mixer_input *input, float gain);
+
+void xas_mixer_input_set_pan(xas_mixer_input *input, float pan);
+
+#endif /* _XAS_MIXER_H */