Add audio policy API changes for audio offload

Changes to the API of audio policy for audio offload support:
- Add isOffloadSupported() function
- Add OUTPUT_FLAG_OFFLOAD
- Extend AudioOutputDescriptor to include a sharing count for direct outputs
- Pass audio_offload_info_t when opening output streams

Change-Id: I5ad26418fdb286eb7ae299d586dd1fd525d48ab9
Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
Signed-off-by: Eric Laurent <elaurent@google.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/include/hardware_legacy/AudioPolicyInterface.h b/include/hardware_legacy/AudioPolicyInterface.h
index d2dd430..3e447c4 100644
--- a/include/hardware_legacy/AudioPolicyInterface.h
+++ b/include/hardware_legacy/AudioPolicyInterface.h
@@ -92,7 +92,9 @@ public:
                                         uint32_t samplingRate = 0,
                                         uint32_t format = AudioSystem::FORMAT_DEFAULT,
                                         uint32_t channels = 0,
-                                        AudioSystem::output_flags flags = AudioSystem::OUTPUT_FLAG_INDIRECT) = 0;
+                                        AudioSystem::output_flags flags =
+                                                AudioSystem::OUTPUT_FLAG_INDIRECT,
+                                        const audio_offload_info_t *offloadInfo = NULL) = 0;
     // indicates to the audio policy manager that the output starts being used by corresponding stream.
     virtual status_t startOutput(audio_io_handle_t output,
                                  AudioSystem::stream_type stream,
@@ -162,6 +164,8 @@ public:
 
     //dump state
     virtual status_t    dump(int fd) = 0;
+
+    virtual bool isOffloadSupported(const audio_offload_info_t& offloadInfo) = 0;
 };
 
 
@@ -192,7 +196,8 @@ public:
                                          audio_format_t *pFormat,
                                          audio_channel_mask_t *pChannelMask,
                                          uint32_t *pLatencyMs,
-                                         audio_output_flags_t flags) = 0;
+                                         audio_output_flags_t flags,
+                                         const audio_offload_info_t *offloadInfo = NULL) = 0;
     // 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) = 0;