ao_coreaudio: explicitly skip input streams

This may or may not fix some issues with the format switching
code. Actually, it seems somewhat unlikely, but then checking
the stream type isn't incorrect either, and is probably
something the API user should always be doing.

1 files changed, 14 insertions, 4 deletions

diff --git a/audio/out/ao_coreaudio.c b/audio/out/ao_coreaudio.c
index ea780a9d1e..d3d2bf046e 100644
--- a/audio/out/ao_coreaudio.c
+++ b/audio/out/ao_coreaudio.c
@@ -192,18 +192,28 @@ static void init_physical_format(struct ao *ao)
                        &streams, &n_streams);
     CHECK_CA_ERROR("could not get number of streams");
 
+    MP_VERBOSE(ao, "Found %zd substream(s).\n", n_streams);
+
     for (int i = 0; i < n_streams; i++) {
         AudioStreamRangedDescription *formats;
         size_t n_formats;
 
-        err = CA_GET_ARY(streams[i],
-                            kAudioStreamPropertyAvailablePhysicalFormats,
-                            &formats, &n_formats);
+        MP_VERBOSE(ao, "Looking at formats in substream %d...\n", i);
+
+        err = CA_GET_ARY(streams[i], kAudioStreamPropertyAvailablePhysicalFormats,
+                         &formats, &n_formats);
 
         if (!CHECK_CA_WARN("could not get number of stream formats"))
             continue; // try next one
 
-        MP_VERBOSE(ao, "Looking at formats in substream %d...\n", i);
+
+        uint32_t direction;
+        err = CA_GET(streams[i], kAudioStreamPropertyDirection, &direction);
+        CHECK_CA_ERROR("could not get stream direction");
+        if (direction != 0) {
+            MP_VERBOSE(ao, "Not an output stream.\n");
+            continue;
+        }
 
         AudioStreamBasicDescription best_asbd = {0};