audio/out: prepare for non-interleaved audio

This comes with two internal AO API changes:

1. ao_driver.play now can take non-interleaved audio. For this purpose,
the data pointer is changed to void **data, where data[0] corresponds to
the pointer in the old API. Also, the len argument as well as the return
value are now in samples, not bytes. "Sample" in this context means the
unit of the smallest possible audio frame, i.e. sample_size * channels.

2. ao_driver.get_space now returns samples instead of bytes. (Similar to
the play function.)

Change all AOs to use the new API.

The AO API as exposed to the rest of the player still uses the old API.
It's emulated in ao.c. This is purely to split the commits changing all
AOs and the commits adding actual support for outputting N-I audio.

1 files changed, 6 insertions, 7 deletions

diff --git a/audio/out/ao_wasapi.c b/audio/out/ao_wasapi.c
index 5d9f33278c..b43bf04753 100644
--- a/audio/out/ao_wasapi.c
+++ b/audio/out/ao_wasapi.c
@@ -1197,7 +1197,7 @@ static int get_space(struct ao *ao)
     if (!ao || !ao->priv)
         return -1;
     struct wasapi_state *state = (struct wasapi_state *)ao->priv;
-    return mp_ring_available(state->ringbuff);
+    return mp_ring_available(state->ringbuff) / ao->sstride;
 }
 
 static void reset_buffers(struct wasapi_state *state)
@@ -1339,25 +1339,24 @@ static void reset(struct ao *ao)
     reset_buffers(state);
 }
 
-static int play(struct ao *ao, void *data, int len, int flags)
+static int play(struct ao *ao, void **data, int samples, int flags)
 {
-    int ret = 0;
     if (!ao || !ao->priv)
-        return ret;
+        return 0;
     struct wasapi_state *state = (struct wasapi_state *)ao->priv;
     if (WaitForSingleObject(state->fatal_error, 0) == WAIT_OBJECT_0) {
         /* something bad happened */
-        return ret;
+        return 0;
     }
 
-    ret = mp_ring_write(state->ringbuff, data, len);
+    int ret = mp_ring_write(state->ringbuff, data[0], samples * ao->sstride);
 
     if (!state->is_playing) {
         /* start playing */
         state->is_playing = 1;
         SetEvent(state->hPlay);
     }
-    return ret;
+    return ret / ao->sstride;
 }
 
 static float get_delay(struct ao *ao)