commit fb16b599c587ccb067e7af5658c5b7038444a7b4
author Sidha Kothari <quic_sidhkoth@quicinc.com> Wed Apr 10 11:35:14 2024 +0530
committer Trinath Thammishetty <quic_tthamish@quicinc.com> Tue May 21 23:46:56 2024 -0700
tree ac12dc5c061fc2989247c848e20a1ff0c98cb666
parent 7d13d4867bfe79bc8c9836c26cab372b5572bcf8

AHAL: enable true stereo record

    - Add true stereo support for ravelin.
    - Dmic-endfire fluence module mixes the data received from both
      channels. To support true stereo, EANS module has to be used.
    - Add custom config to pick default topology with EANS module

Change-Id: I617d5b0418bc1033edae5dc1e3bb800aabb12ba1

configs/parrot/parrot.mk

diff --git a/configs/parrot/parrot.mk b/configs/parrot/parrot.mk
index 6e989a5..7c7604e 100644
--- a/configs/parrot/parrot.mk
+++ b/configs/parrot/parrot.mk
@@ -84,7 +84,8 @@
 AUDIO_FEATURE_ENABLED_USB_BURST_MODE := true
 AUDIO_FEATURE_ENABLED_SVA_MULTI_STAGE := true
 AUDIO_FEATURE_ENABLED_BATTERY_LISTENER := true
-AUDIO_FEATURE_ENABLED_DYNAMIC_SR := false 
+AUDIO_FEATURE_ENABLED_DYNAMIC_SR := false
+AUDIO_FEATURE_ENABLED_TRUE_STEREO := false
 BUILD_AUDIO_TECHPACK_SOURCE := true
 AUDIO_FEATURE_ENABLED_MCS := true
 ##AUDIO_FEATURE_FLAGS

hal/Android.mk

diff --git a/hal/Android.mk b/hal/Android.mk
index 5514ae6..c92c574 100644
--- a/hal/Android.mk
+++ b/hal/Android.mk
@@ -37,6 +37,10 @@
 LOCAL_CFLAGS += -DDYNAMIC_SR_ENABLED
 endif
 
+ifeq ($(strip $(AUDIO_FEATURE_ENABLED_TRUE_STEREO)),true)
+LOCAL_CFLAGS += -DTRUE_STEREO_ENABLED
+endif
+
 LOCAL_CFLAGS += -Wno-macro-redefined
 LOCAL_CFLAGS += -DSOUND_TRIGGER_PLATFORM_NAME=$(TARGET_BOARD_PLATFORM)
 LOCAL_CFLAGS += -D_GNU_SOURCE

hal/AudioStream.cpp

diff --git a/hal/AudioStream.cpp b/hal/AudioStream.cpp
index ab8d53d..106186e 100644
--- a/hal/AudioStream.cpp
+++ b/hal/AudioStream.cpp
@@ -4979,6 +4979,18 @@
             AHAL_DBG("setting SR for usecase %d as %d", usecase_, config_.sample_rate);
         }
 #endif
+
+#ifdef TRUE_STEREO_ENABLED
+        if (source_ == AUDIO_SOURCE_DEFAULT || source_ == AUDIO_SOURCE_MIC || source_ == AUDIO_SOURCE_CAMCORDER) {
+            uint8_t channels =
+                audio_channel_count_from_in_mask(config_.channel_mask);
+            if (channels == 2) {
+                strlcpy(mPalInDevice[i].custom_config.custom_key, "dual-mic-eans",
+                        sizeof(mPalInDevice[i].custom_config.custom_key));
+                AHAL_INFO("Setting custom key as %s", mPalInDevice[i].custom_config.custom_key);
+            }
+        }
+#endif
     }
 
     if (flags & AUDIO_INPUT_FLAG_MMAP_NOIRQ) {