Add a bridge implementation of get_master_volume.

Add an implementation of the new get_master_volume method to bridge from the new
C only audio HAL to the old C++ legacy audio HAL.

Change-Id: Ib66bdcd3bee50949047e7ad51388e15491a71724

4 files changed, 21 insertions, 0 deletions

diff --git a/audio/AudioHardwareInterface.cpp b/audio/AudioHardwareInterface.cpp
index 9cec267..4997a6a 100644
--- a/audio/AudioHardwareInterface.cpp
+++ b/audio/AudioHardwareInterface.cpp
@@ -125,6 +125,11 @@ size_t AudioHardwareBase::getInputBufferSize(uint32_t sampleRate, int format, in
     return 320;
 }
 
+status_t AudioHardwareBase::getMasterVolume(float *volume)
+{
+    return INVALID_OPERATION;
+}
+
 status_t AudioHardwareBase::dumpState(int fd, const Vector<String16>& args)
 {
     const size_t SIZE = 256;
diff --git a/audio/audio_hw_hal.cpp b/audio/audio_hw_hal.cpp
index e6805c5..f249f88 100644
--- a/audio/audio_hw_hal.cpp
+++ b/audio/audio_hw_hal.cpp
@@ -346,6 +346,12 @@ static int adev_set_master_volume(struct audio_hw_device *dev, float volume)
     return ladev->hwif->setMasterVolume(volume);
 }
 
+static int adev_get_master_volume(struct audio_hw_device *dev, float* volume)
+{
+    struct legacy_audio_device *ladev = to_ladev(dev);
+    return ladev->hwif->getMasterVolume(volume);
+}
+
 static int adev_set_mode(struct audio_hw_device *dev, int mode)
 {
     struct legacy_audio_device *ladev = to_ladev(dev);
@@ -553,6 +559,7 @@ static int legacy_adev_open(const hw_module_t* module, const char* name,
     ladev->device.init_check = adev_init_check;
     ladev->device.set_voice_volume = adev_set_voice_volume;
     ladev->device.set_master_volume = adev_set_master_volume;
+    ladev->device.get_master_volume = adev_get_master_volume;
     ladev->device.set_mode = adev_set_mode;
     ladev->device.set_mic_mute = adev_set_mic_mute;
     ladev->device.get_mic_mute = adev_get_mic_mute;
diff --git a/include/hardware_legacy/AudioHardwareBase.h b/include/hardware_legacy/AudioHardwareBase.h
index 3dec357..eac40dc 100644
--- a/include/hardware_legacy/AudioHardwareBase.h
+++ b/include/hardware_legacy/AudioHardwareBase.h
@@ -46,6 +46,7 @@ public:
     virtual String8     getParameters(const String8& keys);
 
     virtual  size_t     getInputBufferSize(uint32_t sampleRate, int format, int channelCount);
+    virtual status_t    getMasterVolume(float *volume);
 
     /**This method dumps the state of the audio hardware */
     virtual status_t dumpState(int fd, const Vector<String16>& args);
diff --git a/include/hardware_legacy/AudioHardwareInterface.h b/include/hardware_legacy/AudioHardwareInterface.h
index 847fe6b..425b0a5 100644
--- a/include/hardware_legacy/AudioHardwareInterface.h
+++ b/include/hardware_legacy/AudioHardwareInterface.h
@@ -210,6 +210,14 @@ public:
     virtual status_t    setMasterVolume(float volume) = 0;
 
     /**
+     * Get the current master volume value for the HAL, if the HAL supports
+     * master volume control.  AudioFlinger will query this value from the
+     * primary audio HAL when the service starts and use the value for setting
+     * the initial master volume across all HALs.
+     */
+    virtual status_t    getMasterVolume(float *volume) = 0;
+
+    /**
      * setMode is called when the audio mode changes. NORMAL mode is for
      * standard audio playback, RINGTONE when a ringtone is playing, and IN_CALL
      * when a call is in progress.