audio policy: add option to use new policy manager

Add build option USE_LEGACY_AUDIO_POLICY to use either new
audio policy manager in local AudioPolicyManager.cpp
or the legacy AudioPolicyManagerBase.cpp via the policy HAL.

New features will be implemented only by the new audio policy manager.
Platform customiization will be by config file or new policy HAL.

AudioPolicyClientImplLegacy.cpp copied from AudioPolicyClientImpl.cpp
AudioPolicyInterfaceImplLegacy.cpp copied from AudioPolicyInterfaceImpl.cpp

New implementations of AudioPolicyInterface and AudioPolicyClient talking directly to
AudioPolicyManager.

Change-Id: I7a320883a1de13de2c9295343e996addf2f3c154

1 files changed, 90 insertions, 1 deletions

diff --git a/services/audiopolicy/AudioPolicyService.h b/services/audiopolicy/AudioPolicyService.h
index ae053a9..cdc90d0 100644
--- a/services/audiopolicy/AudioPolicyService.h
+++ b/services/audiopolicy/AudioPolicyService.h
@@ -30,6 +30,8 @@
 #include <media/IAudioPolicyService.h>
 #include <media/ToneGenerator.h>
 #include <media/AudioEffect.h>
+#include <hardware_legacy/AudioPolicyInterface.h>
+#include "AudioPolicyManager.h"
 
 namespace android {
 
@@ -38,7 +40,6 @@ namespace android {
 class AudioPolicyService :
     public BinderService<AudioPolicyService>,
     public BnAudioPolicyService,
-//    public AudioPolicyClientInterface,
     public IBinder::DeathRecipient
 {
     friend class BinderService<AudioPolicyService>;
@@ -313,6 +314,91 @@ private:
         Vector< sp<AudioEffect> >mEffects;
     };
 
+    class AudioPolicyClient : public AudioPolicyClientInterface
+    {
+     public:
+        AudioPolicyClient(AudioPolicyService *service) : mAudioPolicyService(service) {}
+        virtual ~AudioPolicyClient() {}
+
+        //
+        // Audio HW module functions
+        //
+
+        // loads a HW module.
+        virtual audio_module_handle_t loadHwModule(const char *name);
+
+        //
+        // Audio output Control functions
+        //
+
+        // opens an audio output with the requested parameters. The parameter values can indicate to use the default values
+        // in case the audio policy manager has no specific requirements for the output being opened.
+        // When the function returns, the parameter values reflect the actual values used by the audio hardware output stream.
+        // The audio policy manager can check if the proposed parameters are suitable or not and act accordingly.
+        virtual audio_io_handle_t openOutput(audio_module_handle_t module,
+                                             audio_devices_t *pDevices,
+                                             uint32_t *pSamplingRate,
+                                             audio_format_t *pFormat,
+                                             audio_channel_mask_t *pChannelMask,
+                                             uint32_t *pLatencyMs,
+                                             audio_output_flags_t flags,
+                                             const audio_offload_info_t *offloadInfo = NULL);
+        // creates a special output that is duplicated to the two outputs passed as arguments. The duplication is performed by
+        // a special mixer thread in the AudioFlinger.
+        virtual audio_io_handle_t openDuplicateOutput(audio_io_handle_t output1, audio_io_handle_t output2);
+        // closes the output stream
+        virtual status_t closeOutput(audio_io_handle_t output);
+        // suspends the output. When an output is suspended, the corresponding audio hardware output stream is placed in
+        // standby and the AudioTracks attached to the mixer thread are still processed but the output mix is discarded.
+        virtual status_t suspendOutput(audio_io_handle_t output);
+        // restores a suspended output.
+        virtual status_t restoreOutput(audio_io_handle_t output);
+
+        //
+        // Audio input Control functions
+        //
+
+        // opens an audio input
+        virtual audio_io_handle_t openInput(audio_module_handle_t module,
+                                            audio_devices_t *pDevices,
+                                            uint32_t *pSamplingRate,
+                                            audio_format_t *pFormat,
+                                            audio_channel_mask_t *pChannelMask);
+        // closes an audio input
+        virtual status_t closeInput(audio_io_handle_t input);
+        //
+        // misc control functions
+        //
+
+        // set a stream volume for a particular output. For the same user setting, a given stream type can have different volumes
+        // for each output (destination device) it is attached to.
+        virtual status_t setStreamVolume(audio_stream_type_t stream, float volume, audio_io_handle_t output, int delayMs = 0);
+
+        // invalidate a stream type, causing a reroute to an unspecified new output
+        virtual status_t invalidateStream(audio_stream_type_t stream);
+
+        // function enabling to send proprietary informations directly from audio policy manager to audio hardware interface.
+        virtual void setParameters(audio_io_handle_t ioHandle, const String8& keyValuePairs, int delayMs = 0);
+        // function enabling to receive proprietary informations directly from audio hardware interface to audio policy manager.
+        virtual String8 getParameters(audio_io_handle_t ioHandle, const String8& keys);
+
+        // request the playback of a tone on the specified stream: used for instance to replace notification sounds when playing
+        // over a telephony device during a phone call.
+        virtual status_t startTone(audio_policy_tone_t tone, audio_stream_type_t stream);
+        virtual status_t stopTone();
+
+        // set down link audio volume.
+        virtual status_t setVoiceVolume(float volume, int delayMs = 0);
+
+        // move effect to the specified output
+        virtual status_t moveEffects(int session,
+                                         audio_io_handle_t srcOutput,
+                                         audio_io_handle_t dstOutput);
+
+     private:
+        AudioPolicyService *mAudioPolicyService;
+    };
+
     static const char * const kInputSourceNames[AUDIO_SOURCE_CNT -1];
 
     void setPreProcessorEnabled(const InputDesc *inputDesc, bool enabled);
@@ -344,6 +430,9 @@ private:
     sp<AudioCommandThread> mOutputCommandThread;    // process stop and release output
     struct audio_policy_device *mpAudioPolicyDev;
     struct audio_policy *mpAudioPolicy;
+    AudioPolicyManager *mAudioPolicyManager;
+    AudioPolicyClient *mAudioPolicyClient;
+
     KeyedVector< audio_source_t, InputSourceDesc* > mInputSources;
     KeyedVector< audio_io_handle_t, InputDesc* > mInputs;
 };