ao_coreaudio: move device related functions to the new AO

1 files changed, 255 insertions, 0 deletions

diff --git a/audio/out/ao_coreaudio_device.c b/audio/out/ao_coreaudio_device.c
index 89fd9305f0..a0610a34d5 100644
--- a/audio/out/ao_coreaudio_device.c
+++ b/audio/out/ao_coreaudio_device.c
@@ -50,6 +50,261 @@ static void audio_pause(struct ao *ao);
 static void audio_resume(struct ao *ao);
 static void reset(struct ao *ao);
 
+static bool ca_format_is_digital(AudioStreamBasicDescription asbd)
+{
+    switch (asbd.mFormatID)
+    case 'IAC3':
+    case 'iac3':
+    case  kAudioFormat60958AC3:
+    case  kAudioFormatAC3:
+        return true;
+    return false;
+}
+
+static bool ca_stream_supports_digital(struct ao *ao, AudioStreamID stream)
+{
+    AudioStreamRangedDescription *formats = NULL;
+    size_t n_formats;
+
+    OSStatus err =
+        CA_GET_ARY(stream, kAudioStreamPropertyAvailablePhysicalFormats,
+                   &formats, &n_formats);
+
+    CHECK_CA_ERROR("Could not get number of stream formats.");
+
+    for (int i = 0; i < n_formats; i++) {
+        AudioStreamBasicDescription asbd = formats[i].mFormat;
+        ca_print_asbd(ao, "supported format:", &(asbd));
+        if (ca_format_is_digital(asbd)) {
+            talloc_free(formats);
+            return true;
+        }
+    }
+
+    talloc_free(formats);
+coreaudio_error:
+    return false;
+}
+
+static bool ca_device_supports_digital(struct ao *ao, AudioDeviceID device)
+{
+    AudioStreamID *streams = NULL;
+    size_t n_streams;
+
+    /* Retrieve all the output streams. */
+    OSStatus err =
+        CA_GET_ARY_O(device, kAudioDevicePropertyStreams, &streams, &n_streams);
+
+    CHECK_CA_ERROR("could not get number of streams.");
+
+    for (int i = 0; i < n_streams; i++) {
+        if (ca_stream_supports_digital(ao, streams[i])) {
+            talloc_free(streams);
+            return true;
+        }
+    }
+
+    talloc_free(streams);
+
+coreaudio_error:
+    return false;
+}
+
+static OSStatus ca_property_listener(
+    AudioObjectPropertySelector selector,
+    AudioObjectID object, uint32_t n_addresses,
+    const AudioObjectPropertyAddress addresses[],
+    void *data)
+{
+    void *talloc_ctx = talloc_new(NULL);
+
+    for (int i = 0; i < n_addresses; i++) {
+        if (addresses[i].mSelector == selector) {
+            if (data) *(volatile int *)data = 1;
+            break;
+        }
+    }
+    talloc_free(talloc_ctx);
+    return noErr;
+}
+
+static OSStatus ca_stream_listener(
+    AudioObjectID object, uint32_t n_addresses,
+    const AudioObjectPropertyAddress addresses[],
+    void *data)
+{
+    return ca_property_listener(kAudioStreamPropertyPhysicalFormat,
+                                object, n_addresses, addresses, data);
+}
+
+static OSStatus ca_device_listener(
+    AudioObjectID object, uint32_t n_addresses,
+    const AudioObjectPropertyAddress addresses[],
+    void *data)
+{
+    return ca_property_listener(kAudioDevicePropertyDeviceHasChanged,
+                                object, n_addresses, addresses, data);
+}
+
+static OSStatus ca_lock_device(AudioDeviceID device, pid_t *pid) {
+    *pid = getpid();
+    OSStatus err = CA_SET(device, kAudioDevicePropertyHogMode, pid);
+    if (err != noErr)
+        *pid = -1;
+
+    return err;
+}
+
+static OSStatus ca_unlock_device(AudioDeviceID device, pid_t *pid) {
+    if (*pid == getpid()) {
+        *pid = -1;
+        return CA_SET(device, kAudioDevicePropertyHogMode, &pid);
+    }
+    return noErr;
+}
+
+static OSStatus ca_change_mixing(struct ao *ao, AudioDeviceID device,
+                                 uint32_t val, bool *changed) {
+    *changed = false;
+
+    AudioObjectPropertyAddress p_addr = (AudioObjectPropertyAddress) {
+        .mSelector = kAudioDevicePropertySupportsMixing,
+        .mScope    = kAudioObjectPropertyScopeGlobal,
+        .mElement  = kAudioObjectPropertyElementMaster,
+    };
+
+    if (AudioObjectHasProperty(device, &p_addr)) {
+        OSStatus err;
+        Boolean writeable = 0;
+        err = CA_SETTABLE(device, kAudioDevicePropertySupportsMixing,
+                          &writeable);
+
+        if (!CHECK_CA_WARN("can't tell if mixing property is settable")) {
+            return err;
+        }
+
+        if (!writeable)
+            return noErr;
+
+        err = CA_SET(device, kAudioDevicePropertySupportsMixing, &val);
+        if (err != noErr)
+            return err;
+
+        if (!CHECK_CA_WARN("can't set mix mode")) {
+            return err;
+        }
+
+        *changed = true;
+    }
+
+    return noErr;
+}
+
+static OSStatus ca_disable_mixing(struct ao *ao,
+                                  AudioDeviceID device, bool *changed) {
+    return ca_change_mixing(ao, device, 0, changed);
+}
+
+static OSStatus ca_enable_mixing(struct ao *ao,
+                                 AudioDeviceID device, bool changed) {
+    if (changed) {
+        bool dont_care = false;
+        return ca_change_mixing(ao, device, 1, &dont_care);
+    }
+
+    return noErr;
+}
+
+static OSStatus ca_change_device_listening(AudioDeviceID device,
+                                           void *flag, bool enabled)
+{
+    AudioObjectPropertyAddress p_addr = (AudioObjectPropertyAddress) {
+        .mSelector = kAudioDevicePropertyDeviceHasChanged,
+        .mScope    = kAudioObjectPropertyScopeGlobal,
+        .mElement  = kAudioObjectPropertyElementMaster,
+    };
+
+    if (enabled) {
+        return AudioObjectAddPropertyListener(
+            device, &p_addr, ca_device_listener, flag);
+    } else {
+        return AudioObjectRemovePropertyListener(
+            device, &p_addr, ca_device_listener, flag);
+    }
+}
+
+static OSStatus ca_enable_device_listener(AudioDeviceID device, void *flag) {
+    return ca_change_device_listening(device, flag, true);
+}
+
+static OSStatus ca_disable_device_listener(AudioDeviceID device, void *flag) {
+    return ca_change_device_listening(device, flag, false);
+}
+
+static bool ca_change_format(struct ao *ao, AudioStreamID stream,
+                             AudioStreamBasicDescription change_format)
+{
+    OSStatus err = noErr;
+    AudioObjectPropertyAddress p_addr;
+    volatile int stream_format_changed = 0;
+
+    ca_print_asbd(ao, "setting stream format:", &change_format);
+
+    /* Install the callback. */
+    p_addr = (AudioObjectPropertyAddress) {
+        .mSelector = kAudioStreamPropertyPhysicalFormat,
+        .mScope    = kAudioObjectPropertyScopeGlobal,
+        .mElement  = kAudioObjectPropertyElementMaster,
+    };
+
+    err = AudioObjectAddPropertyListener(stream, &p_addr, ca_stream_listener,
+                                         (void *)&stream_format_changed);
+    if (!CHECK_CA_WARN("can't add property listener during format change")) {
+        return false;
+    }
+
+    /* Change the format. */
+    err = CA_SET(stream, kAudioStreamPropertyPhysicalFormat, &change_format);
+    if (!CHECK_CA_WARN("error changing physical format")) {
+        return false;
+    }
+
+    /* The AudioStreamSetProperty is not only asynchronious,
+     * it is also not Atomic, in its behaviour.
+     * Therefore we check 5 times before we really give up. */
+    bool format_set = false;
+    for (int i = 0; !format_set && i < 5; i++) {
+        for (int j = 0; !stream_format_changed && j < 50; j++)
+            mp_sleep_us(10000);
+
+        if (stream_format_changed) {
+            stream_format_changed = 0;
+        } else {
+            MP_VERBOSE(ao, "reached timeout\n");
+        }
+
+        AudioStreamBasicDescription actual_format;
+        err = CA_GET(stream, kAudioStreamPropertyPhysicalFormat, &actual_format);
+
+        ca_print_asbd(ao, "actual format in use:", &actual_format);
+        if (actual_format.mSampleRate == change_format.mSampleRate &&
+            actual_format.mFormatID == change_format.mFormatID &&
+            actual_format.mFramesPerPacket == change_format.mFramesPerPacket) {
+            format_set = true;
+        }
+    }
+
+    err = AudioObjectRemovePropertyListener(stream, &p_addr, ca_stream_listener,
+                                            (void *)&stream_format_changed);
+
+    if (!CHECK_CA_WARN("can't remove property listener")) {
+        return false;
+    }
+
+    return format_set;
+}
+
+
 struct priv {
     AudioDeviceID device;   // selected device