commit 707ff7722f258c3704622888f69030e88fea8eb3
author Karthik Reddy Katta <a_katta@codeaurora.org> Tue Jul 14 16:05:18 2015 +0530
committer Gerrit - the friendly Code Review server <code-review@localhost> Thu Jul 30 22:03:01 2015 -0700
tree 6fc170728650cb6f69e7c0ed31506d49cd3ee513
parent 5b062b5e6ec3e5ca0c905f96ca366b5db104b9db

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 applications.

Change-Id: Ie451ea683c90e02fdcdc5b9702649e73a55ab8c2

policy_hal/AudioPolicyManager.cpp

diff --git a/policy_hal/AudioPolicyManager.cpp b/policy_hal/AudioPolicyManager.cpp
index 381f394..bb11e84 100755
--- a/policy_hal/AudioPolicyManager.cpp
+++ b/policy_hal/AudioPolicyManager.cpp
@@ -1186,6 +1186,52 @@
         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 VOICE_CONCURRENCY
     char propValue[PROPERTY_VALUE_MAX];
     bool prop_play_enabled=false, prop_voip_enabled = false;