[PULL 7/7] coreaudio: Fix output stream format settings

[Gerd Hoffmann <kraxel@redhat.com>]

From: Akihiko Odaki <akihiko.odaki@gmail.com>

Before commit 7d6948cd98cf5ad8a3458a4ce7fdbcb79bcd1212, it was coded to
retrieve the initial output stream format settings, modify the frame
rate, and set again. However, I removed a frame rate modification code by
mistake in the commit. It also assumes the initial output stream format
is consistent with what QEMU expects, but that expectation is not in the
code, which makes it harder to understand and will lead to breakage if
the initial settings change.

This change explicitly sets all of the output stream settings to solve
these problems.

Signed-off-by: Akihiko Odaki <akihiko.odaki@gmail.com>
Message-Id: <20210616141721.54091-1-akihiko.odaki@gmail.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 audio/coreaudio.c | 48 +++++++++++++----------------------------------
 1 file changed, 13 insertions(+), 35 deletions(-)

diff --git a/audio/coreaudio.c b/audio/coreaudio.c
index 578ec9b8b2e6..f570e1ee60ef 100644
--- a/audio/coreaudio.c
+++ b/audio/coreaudio.c
@@ -39,7 +39,6 @@ typedef struct coreaudioVoiceOut {
     int frameSizeSetting;
     uint32_t bufferCount;
     UInt32 audioDevicePropertyBufferFrameSize;
-    AudioStreamBasicDescription outputStreamBasicDescription;
     AudioDeviceIOProcID ioprocid;
     bool enabled;
 } coreaudioVoiceOut;
@@ -114,24 +113,6 @@ static OSStatus coreaudio_set_framesize(AudioDeviceID id, UInt32 *framesize)
                                       framesize);
 }
 
-static OSStatus coreaudio_get_streamformat(AudioDeviceID id,
-                                           AudioStreamBasicDescription *d)
-{
-    UInt32 size = sizeof(*d);
-    AudioObjectPropertyAddress addr = {
-        kAudioDevicePropertyStreamFormat,
-        kAudioDevicePropertyScopeOutput,
-        kAudioObjectPropertyElementMaster
-    };
-
-    return AudioObjectGetPropertyData(id,
-                                      &addr,
-                                      0,
-                                      NULL,
-                                      &size,
-                                      d);
-}
-
 static OSStatus coreaudio_set_streamformat(AudioDeviceID id,
                                            AudioStreamBasicDescription *d)
 {
@@ -373,6 +354,17 @@ static OSStatus init_out_device(coreaudioVoiceOut *core)
     OSStatus status;
     AudioValueRange frameRange;
 
+    AudioStreamBasicDescription streamBasicDescription = {
+        .mBitsPerChannel = core->hw.info.bits,
+        .mBytesPerFrame = core->hw.info.bytes_per_frame,
+        .mBytesPerPacket = core->hw.info.bytes_per_frame,
+        .mChannelsPerFrame = core->hw.info.nchannels,
+        .mFormatFlags = kLinearPCMFormatFlagIsFloat,
+        .mFormatID = kAudioFormatLinearPCM,
+        .mFramesPerPacket = 1,
+        .mSampleRate = core->hw.info.freq
+    };
+
     status = coreaudio_get_voice(&core->outputDeviceID);
     if (status != kAudioHardwareNoError) {
         coreaudio_playback_logerr (status,
@@ -432,29 +424,16 @@ static OSStatus init_out_device(coreaudioVoiceOut *core)
     }
     core->hw.samples = core->bufferCount * core->audioDevicePropertyBufferFrameSize;
 
-    /* get StreamFormat */
-    status = coreaudio_get_streamformat(core->outputDeviceID,
-                                        &core->outputStreamBasicDescription);
-    if (status == kAudioHardwareBadObjectError) {
-        return 0;
-    }
-    if (status != kAudioHardwareNoError) {
-        coreaudio_playback_logerr (status,
-                                    "Could not get Device Stream properties\n");
-        core->outputDeviceID = kAudioDeviceUnknown;
-        return status;
-    }
-
     /* set Samplerate */
     status = coreaudio_set_streamformat(core->outputDeviceID,
-                                        &core->outputStreamBasicDescription);
+                                        &streamBasicDescription);
     if (status == kAudioHardwareBadObjectError) {
         return 0;
     }
     if (status != kAudioHardwareNoError) {
         coreaudio_playback_logerr (status,
                                    "Could not set samplerate %lf\n",
-                                   core->outputStreamBasicDescription.mSampleRate);
+                                   streamBasicDescription.mSampleRate);
         core->outputDeviceID = kAudioDeviceUnknown;
         return status;
     }
@@ -598,7 +577,6 @@ static int coreaudio_init_out(HWVoiceOut *hw, struct audsettings *as,
         qapi_AudiodevCoreaudioPerDirectionOptions_base(cpdo), as, 11610);
 
     core->bufferCount = cpdo->has_buffer_count ? cpdo->buffer_count : 4;
-    core->outputStreamBasicDescription.mSampleRate = (Float64) as->freq;
 
     status = AudioObjectAddPropertyListener(kAudioObjectSystemObject,
                                             &voice_addr, handle_voice_change,
-- 
2.31.1