policy_hal: Add voip changes to audio policy
Add support for voip path where voip driver is
used instead of audio playback/record path for
voip application.
Change-Id: Ie451ea683c90e02fdcdc5b9702649e73a55ab8c2
diff --git a/policy_hal/AudioPolicyManager.cpp b/policy_hal/AudioPolicyManager.cpp
index 033610f..9f5d7ca 100644
--- a/policy_hal/AudioPolicyManager.cpp
+++ b/policy_hal/AudioPolicyManager.cpp
@@ -995,7 +995,53 @@
// compress should not be used for non-music streams
ALOGE("Offloading only allowed with music stream");
return 0;
+ }
+
+ if ((stream == AUDIO_STREAM_VOICE_CALL) &&
+ (channelMask == 1) &&
+ (samplingRate == 8000 || samplingRate == 16000)) {
+ // Allow Voip direct output only if:
+ // audio mode is MODE_IN_COMMUNCATION; AND
+ // voip output is not opened already; AND
+ // requested sample rate matches with that of voip input stream (if opened already)
+ int value = 0;
+ uint32_t mode = 0, voipOutCount = 1, voipSampleRate = 1;
+ String8 valueStr = mpClientInterface->getParameters((audio_io_handle_t)0,
+ String8("audio_mode"));
+ AudioParameter result = AudioParameter(valueStr);
+ if (result.getInt(String8("audio_mode"), value) == NO_ERROR) {
+ mode = value;
+ }
+
+ valueStr = mpClientInterface->getParameters((audio_io_handle_t)0,
+ String8("voip_out_stream_count"));
+ result = AudioParameter(valueStr);
+ if (result.getInt(String8("voip_out_stream_count"), value) == NO_ERROR) {
+ voipOutCount = value;
+ }
+
+ valueStr = mpClientInterface->getParameters((audio_io_handle_t)0,
+ String8("voip_sample_rate"));
+ result = AudioParameter(valueStr);
+ if (result.getInt(String8("voip_sample_rate"), value) == NO_ERROR) {
+ voipSampleRate = value;
+ }
+
+ if ((mode == AUDIO_MODE_IN_COMMUNICATION) && (voipOutCount == 0) &&
+ ((voipSampleRate == 0) || (voipSampleRate == samplingRate))) {
+ if (audio_is_linear_pcm(format)) {
+ char propValue[PROPERTY_VALUE_MAX] = {0};
+ property_get("use.voice.path.for.pcm.voip", propValue, "0");
+ bool voipPcmSysPropEnabled = !strncmp("true", propValue, sizeof("true"));
+ if (voipPcmSysPropEnabled && (format == AUDIO_FORMAT_PCM_16_BIT)) {
+ flags = (audio_output_flags_t)((flags &~AUDIO_OUTPUT_FLAG_FAST) |
+ AUDIO_OUTPUT_FLAG_VOIP_RX | AUDIO_OUTPUT_FLAG_DIRECT);
+ ALOGD("Set VoIP and Direct output flags for PCM format");
+ }
+ }
+ }
}
+
#ifdef AUDIO_EXTN_AFE_PROXY_ENABLED
/*
* WFD audio routes back to target speaker when starting a ringtone playback.