Code changes for audio offload support

- Share existing offload output if compatible instead of
  creating a new one. Hardware has limited number of
  offload channels (possible only 1) so we must use as
  few as possible

- Changes to routing handling for offloaded outputs

Change-Id: I11111d8f504828595bd8dbf66444cbd1202e7192
Signed-off-by: Eric Laurent <elaurent@google.com>

1 files changed, 4 insertions, 10 deletions

diff --git a/include/hardware_legacy/AudioPolicyManagerBase.h b/include/hardware_legacy/AudioPolicyManagerBase.h
index cb2a7fa..e580e1e 100644
--- a/include/hardware_legacy/AudioPolicyManagerBase.h
+++ b/include/hardware_legacy/AudioPolicyManagerBase.h
@@ -52,6 +52,10 @@ namespace android_audio_legacy {
 
 #define NUM_VOL_CURVE_KNEES 2
 
+// Default minimum length allowed for offloading a compressed track
+// Can be overridden by the audio.offload.min.duration.secs property
+#define OFFLOAD_DEFAULT_MIN_DURATION_SECS 5
+
 // ----------------------------------------------------------------------------
 // AudioPolicyManagerBase implements audio policy manager behavior common to all platforms.
 // Each platform must implement an AudioPolicyManager class derived from AudioPolicyManagerBase
@@ -444,16 +448,6 @@ protected:
 
         void updateDevicesAndOutputs();
 
-        // true if current platform requires a specific output to be opened for this particular
-        // set of parameters. This function is called by getOutput() and is implemented by platform
-        // specific audio policy manager.
-        virtual bool needsDirectOuput(audio_stream_type_t stream,
-                                      uint32_t samplingRate,
-                                      audio_format_t format,
-                                      audio_channel_mask_t channelMask,
-                                      audio_output_flags_t flags,
-                                      audio_devices_t device);
-
         virtual uint32_t getMaxEffectsCpuLoad();
         virtual uint32_t getMaxEffectsMemory();
 #ifdef AUDIO_POLICY_TEST