commit 4b084132f041c701227982bb11f4c321a4ffe072
author Eric Laurent <elaurent@google.com> Fri Oct 19 17:33:43 2018 -0700
committer Aniket Kumar Lata <alata@codeaurora.org> Sun May 05 10:34:47 2019 -0700
tree 29595657fc557db94f171ab8aa202ba13d7034e2
parent 94c7597422e8195ae3b6e0504af2e2c461bab6f5

audio: select camcorder snd device according to camera orientation

Add audio parameter indicating use of front or back camera to select
proper input path tuning in camcorder mode.
Also take device orientation for stereo channel swaping.

Bug: 118022272

Test: verified with camera service patch sending camera facing parameter
Change-Id: If24b47d922aeedaaa144f4a5f4cacddce2c9eeaf
(cherry picked from commit 5f4ca9505df8177127c1f1a7d292d684ec30ff50)
(cherry picked from commit 5727439e2f5302a225310f4af3f373e9e8424495)

hal/audio_hw.h

diff --git a/hal/audio_hw.h b/hal/audio_hw.h
index 1a04cff..8df4437 100644
--- a/hal/audio_hw.h
+++ b/hal/audio_hw.h
@@ -245,6 +245,33 @@
     OFFLOAD_CMD_ERROR,              /* offload playback hit some error */
 };
 
+/*
+ * Camera selection indicated via set_parameters "cameraFacing=front|back and
+ * "rotation=0|90|180|270""
+ */
+enum {
+  CAMERA_FACING_BACK = 0x0,
+  CAMERA_FACING_FRONT = 0x1,
+  CAMERA_FACING_MASK = 0x0F,
+  CAMERA_ROTATION_LANDSCAPE = 0x0,
+  CAMERA_ROTATION_INVERT_LANDSCAPE = 0x10,
+  CAMERA_ROTATION_PORTRAIT = 0x20,
+  CAMERA_ROTATION_MASK = 0xF0,
+  CAMERA_BACK_LANDSCAPE = (CAMERA_FACING_BACK|CAMERA_ROTATION_LANDSCAPE),
+  CAMERA_BACK_INVERT_LANDSCAPE = (CAMERA_FACING_BACK|CAMERA_ROTATION_INVERT_LANDSCAPE),
+  CAMERA_BACK_PORTRAIT = (CAMERA_FACING_BACK|CAMERA_ROTATION_PORTRAIT),
+  CAMERA_FRONT_LANDSCAPE = (CAMERA_FACING_FRONT|CAMERA_ROTATION_LANDSCAPE),
+  CAMERA_FRONT_INVERT_LANDSCAPE = (CAMERA_FACING_FRONT|CAMERA_ROTATION_INVERT_LANDSCAPE),
+  CAMERA_FRONT_PORTRAIT = (CAMERA_FACING_FRONT|CAMERA_ROTATION_PORTRAIT),
+
+  CAMERA_DEFAULT = CAMERA_BACK_LANDSCAPE,
+};
+
+//FIXME: to be replaced by proper video capture properties API
+#define AUDIO_PARAMETER_KEY_CAMERA_FACING "cameraFacing"
+#define AUDIO_PARAMETER_VALUE_FRONT "front"
+#define AUDIO_PARAMETER_VALUE_BACK "back"
+
 enum {
     OFFLOAD_STATE_IDLE,
     OFFLOAD_STATE_PLAYING,
@@ -505,6 +532,7 @@
 
 struct audio_device {
     struct audio_hw_device device;
+
     pthread_mutex_t lock; /* see note below on mutex acquisition order */
     pthread_mutex_t cal_lock;
     struct mixer *mixer;
@@ -609,6 +637,7 @@
     struct listnode active_inputs_list;
     struct listnode active_outputs_list;
     bool use_old_pspd_mix_ctrl;
+    int camera_orientation; /* CAMERA_BACK_LANDSCAPE ... CAMERA_FRONT_PORTRAIT */
 };
 
 int select_devices(struct audio_device *adev,