Add xas_object call table to mixer

2 files changed, 26 insertions, 0 deletions

diff --git a/include/xas/mixer.h b/include/xas/mixer.h
index 79d6ffb..3cf8067 100644
--- a/include/xas/mixer.h
+++ b/include/xas/mixer.h
@@ -21,6 +21,7 @@ typedef struct _xas_mixer_input {
 } xas_mixer_input;
 
 typedef struct _xas_mixer {
+    xas_object obj;
     xas_mixer_input *inputs,
                       *last;
 
diff --git a/src/mixer.c b/src/mixer.c
index a60118d..60233de 100644
--- a/src/mixer.c
+++ b/src/mixer.c
@@ -133,6 +133,25 @@ error_audio_read_stream:
     return -1;
 }
 
+/* TODO: Implement a single output gain, don't adjust gain on all inputs */
+static int set_gain(xas_mixer *mixer, float gain) {
+    xas_mixer_input *input = mixer->inputs;
+
+    while (input) {
+        xas_mixer_input *next = input->next;
+
+        xas_mixer_input_set_gain(input, gain);
+
+        input = next;
+    }
+
+    return 0;
+}
+
+static int noop(xas_mixer *mixer) {
+    return 0;
+}
+
 xas_mixer *xas_mixer_new(xas_audio_format format, size_t buffer_size) {
     xas_mixer *mixer;
 
@@ -154,6 +173,12 @@ xas_mixer *xas_mixer_new(xas_audio_format format, size_t buffer_size) {
         goto error_audio_stream_new_source;
     }
 
+    mixer->obj.start      = (xas_object_start_callback)noop;
+    mixer->obj.stop       = (xas_object_stop_callback)noop;
+    mixer->obj.set_gain   = (xas_object_set_gain_callback)set_gain;
+    mixer->obj.stream_new = (xas_object_stream_new_callback)xas_mixer_output;
+    mixer->obj.destroy    = (xas_object_destroy_callback)xas_mixer_destroy;
+
     mixer->inputs      = NULL;
     mixer->last        = NULL;
     mixer->buffer_size = buffer_size;