policy_hal: hal: add support to enable Direct PCM
- add support for direct pcm output
- add support for direct pcm in hal
if output flag is direct_pcm choose compress offload path
- add support for direct pcm in custom audio policy manager
force add direct flag when we detect pcm track in music and
game use case
Change-Id: Ie69c988ef9cd0477efa77611ceddccdd6b17a163
diff --git a/policy_hal/AudioPolicyManager.cpp b/policy_hal/AudioPolicyManager.cpp
index f4c0722..3b307f8 100755
--- a/policy_hal/AudioPolicyManager.cpp
+++ b/policy_hal/AudioPolicyManager.cpp
@@ -983,6 +983,45 @@
}
return false;
}
+
+status_t AudioPolicyManagerCustom::getOutputForAttr(const audio_attributes_t *attr,
+ audio_io_handle_t *output,
+ audio_session_t session,
+ audio_stream_type_t *stream,
+ uid_t uid,
+ uint32_t samplingRate,
+ audio_format_t format,
+ audio_channel_mask_t channelMask,
+ audio_output_flags_t flags,
+ audio_port_handle_t selectedDeviceId,
+ const audio_offload_info_t *offloadInfo)
+{
+ audio_offload_info_t tOffloadInfo = AUDIO_INFO_INITIALIZER;
+
+ bool pcmOffloadEnabled = property_get_bool("audio.offload.track.enable", false);
+
+ if (offloadInfo == NULL && pcmOffloadEnabled) {
+ tOffloadInfo.sample_rate = samplingRate;
+ tOffloadInfo.channel_mask = channelMask;
+ tOffloadInfo.format = format;
+ tOffloadInfo.stream_type = *stream;
+ tOffloadInfo.bit_width = 16; //hard coded for PCM_16
+ if (attr != NULL) {
+ ALOGV("found attribute .. setting usage %d ", attr->usage);
+ tOffloadInfo.usage = attr->usage;
+ } else {
+ ALOGD("%s:: attribute is NULL .. no usage set", __func__);
+ }
+ offloadInfo = &tOffloadInfo;
+ }
+
+ return AudioPolicyManager::getOutputForAttr(attr, output, session, stream,
+ (uid_t)uid, (uint32_t)samplingRate,
+ format, (audio_channel_mask_t)channelMask,
+ flags, (audio_port_handle_t)selectedDeviceId,
+ offloadInfo);
+}
+
audio_io_handle_t AudioPolicyManagerCustom::getOutputForDevice(
audio_devices_t device,
audio_session_t session __unused,
@@ -1112,7 +1151,7 @@
}
#endif
// open a direct output if required by specified parameters
- //force direct flag if offload flag is set: offloading implies a direct output stream
+ // force direct flag if offload flag is set: offloading implies a direct output stream
// and all common behaviors are driven by checking only the direct flag
// this should normally be set appropriately in the policy configuration file
if ((flags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0) {
@@ -1121,6 +1160,18 @@
if ((flags & AUDIO_OUTPUT_FLAG_HW_AV_SYNC) != 0) {
flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
}
+
+ // Do offload magic here
+ if ((flags == AUDIO_OUTPUT_FLAG_NONE) && (stream == AUDIO_STREAM_MUSIC) &&
+ (offloadInfo != NULL) &&
+ ((offloadInfo->usage == AUDIO_USAGE_MEDIA ||
+ (offloadInfo->usage == AUDIO_USAGE_GAME)))) {
+ if ((flags & AUDIO_OUTPUT_FLAG_DIRECT) == 0) {
+ ALOGD("AudioCustomHAL --> Force Direct Flag ..");
+ flags = (audio_output_flags_t)(flags | AUDIO_OUTPUT_FLAG_DIRECT);
+ }
+ }
+
// only allow deep buffering for music stream type
if (stream != AUDIO_STREAM_MUSIC) {
flags = (audio_output_flags_t)(flags &~AUDIO_OUTPUT_FLAG_DEEP_BUFFER);
@@ -1272,7 +1323,7 @@
ALOGW_IF((output == 0), "getOutput() could not find output for stream %d, samplingRate %d,"
"format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
- ALOGV(" getOutputForDevice() returns output %d", output);
+ ALOGV("getOutputForDevice() returns output %d", output);
return output;
}
diff --git a/policy_hal/AudioPolicyManager.h b/policy_hal/AudioPolicyManager.h
index 91b7e39..2e5951c 100644
--- a/policy_hal/AudioPolicyManager.h
+++ b/policy_hal/AudioPolicyManager.h
@@ -91,6 +91,7 @@
status_t stopSource(sp<AudioOutputDescriptor> outputDesc,
audio_stream_type_t stream,
bool forceDeviceUpdate);
+
// event is one of STARTING_OUTPUT, STARTING_BEACON, STOPPING_OUTPUT, STOPPING_BEACON 313
// returns 0 if no mute/unmute event happened, the largest latency of the device where 314
// the mute/unmute happened 315
@@ -123,6 +124,18 @@
audio_channel_mask_t channelMask,
audio_output_flags_t flags,
const audio_offload_info_t *offloadInfo);
+ // internal method to fill offload info in case of Direct PCM
+ status_t getOutputForAttr(const audio_attributes_t *attr,
+ audio_io_handle_t *output,
+ audio_session_t session,
+ audio_stream_type_t *stream,
+ uid_t uid,
+ uint32_t samplingRate,
+ audio_format_t format,
+ audio_channel_mask_t channelMask,
+ audio_output_flags_t flags,
+ audio_port_handle_t selectedDeviceId,
+ const audio_offload_info_t *offloadInfo);
// Used for voip + voice concurrency usecase
int mPrevPhoneState;
int mvoice_call_state;