Bug 1598148 - P2: Update cubeb to a971bf1. r=kinetik

Pick commits:
a971bf1 - Bump the priority of audiounit-rust in default init
ea39471 - Merge branch 'Filoppi-patch-1'
2cc3a02 - Fix conversion from com_heap_ptr.
0bd0338 - Merge branch 'patch-1' of https://github.com/Filoppi/cubeb into Filoppi-patch-1
b69886c - As suggested
20cb7e0 - Fixed small memory leak
Applying a patch on top of a971bf1a045b0e5dcaffd2a15c3255677f43cd2d

Differential Revision: https://phabricator.services.mozilla.com/D54055

media/libcubeb/moz.yaml

@@ -19,5 +19,5 @@ origin:
   license: "ISC"
 
   # update.sh will update this value
-  release: "575bd443893638da4a88468576e4e10b706c7a6c (2020-06-30 22:57:45 +1200)"
+  release: "a971bf1a045b0e5dcaffd2a15c3255677f43cd2d (2020-07-07 11:53:43 +1200)"
 

media/libcubeb/src/cubeb.c

@@ -200,12 +200,12 @@ cubeb_init(cubeb ** context, char const * context_name, char const * backend_nam
 #if defined(USE_ALSA)
     alsa_init,
 #endif
-#if defined(USE_AUDIOUNIT)
-    audiounit_init,
-#endif
 #if defined(USE_AUDIOUNIT_RUST)
     audiounit_rust_init,
 #endif
+#if defined(USE_AUDIOUNIT)
+    audiounit_init,
+#endif
 #if defined(USE_WASAPI)
     wasapi_init,
 #endif

media/libcubeb/src/cubeb_wasapi.cpp

@@ -1777,17 +1777,18 @@ handle_channel_layout(cubeb_stream * stm,  EDataFlow direction, com_heap_ptr<WAV
   waveformatex_update_derived_properties(mix_format.get());
 
   /* Check if wasapi will accept our channel layout request. */
-  WAVEFORMATEX * closest;
+  WAVEFORMATEX * tmp = nullptr;
   HRESULT hr = audio_client->IsFormatSupported(AUDCLNT_SHAREMODE_SHARED,
                                                mix_format.get(),
-                                               &closest);
+                                               &tmp);
+  com_heap_ptr<WAVEFORMATEX> closest(tmp);
   if (hr == S_FALSE) {
     /* Channel layout not supported, but WASAPI gives us a suggestion. Use it,
        and handle the eventual upmix/downmix ourselves. Ignore the subformat of
        the suggestion, since it seems to always be IEEE_FLOAT. */
     LOG("Using WASAPI suggested format: channels: %d", closest->nChannels);
     XASSERT(closest->wFormatTag == WAVE_FORMAT_EXTENSIBLE);
-    WAVEFORMATEXTENSIBLE * closest_pcm = reinterpret_cast<WAVEFORMATEXTENSIBLE *>(closest);
+    WAVEFORMATEXTENSIBLE * closest_pcm = reinterpret_cast<WAVEFORMATEXTENSIBLE *>(closest.get());
     format_pcm->dwChannelMask = closest_pcm->dwChannelMask;
     mix_format->nChannels = closest->nChannels;
     waveformatex_update_derived_properties(mix_format.get());