commit df05eea69b32c30a85e62a6cb46089df65c64b9d
author Derek Chen <chenche@codeaurora.org> Thu Aug 01 13:57:49 2019 -0700
committer Derek Chen <chenche@codeaurora.org> Thu Aug 01 13:57:49 2019 -0700
tree df95da7b6b0c28d12a75d5cd595054493e08ce57
parent 538f5d667802de9b4caeb74ee4f743639f28200e

hal: add rear seat playback support for automotive

Add rear seat playback support for multi-zone
audio support on automotive platform.

Change-Id: Ia3d4c4a4f78950e99a8d4955e910cc8902b6bb17

hal/audio_extn/audio_extn.h

diff --git a/hal/audio_extn/audio_extn.h b/hal/audio_extn/audio_extn.h
index 4fa96da..2a7d70a 100644
--- a/hal/audio_extn/audio_extn.h
+++ b/hal/audio_extn/audio_extn.h
@@ -1286,6 +1286,9 @@
 #ifndef AUDIO_OUTPUT_FLAG_PHONE
 #define AUDIO_OUTPUT_FLAG_PHONE 0x800000
 #endif
+#ifndef AUDIO_OUTPUT_FLAG_REAR_SEAT
+#define AUDIO_OUTPUT_FLAG_REAR_SEAT 0x1000000
+#endif
 int audio_extn_auto_hal_init(struct audio_device *adev);
 void audio_extn_auto_hal_deinit(void);
 int audio_extn_auto_hal_create_audio_patch(struct audio_hw_device *dev,

hal/audio_extn/auto_hal.c

diff --git a/hal/audio_extn/auto_hal.c b/hal/audio_extn/auto_hal.c
index 81ef46c..a295a4d 100644
--- a/hal/audio_extn/auto_hal.c
+++ b/hal/audio_extn/auto_hal.c
@@ -89,6 +89,7 @@
     USECASE_AUDIO_PLAYBACK_SYS_NOTIFICATION,
     USECASE_AUDIO_PLAYBACK_NAV_GUIDANCE,
     USECASE_AUDIO_PLAYBACK_PHONE,
+    USECASE_AUDIO_PLAYBACK_REAR_SEAT,
 };
 
 int auto_hal_release_audio_patch(struct audio_hw_device *dev,
@@ -505,6 +506,19 @@
         if (out->flags == AUDIO_OUTPUT_FLAG_NONE)
             out->flags |= AUDIO_OUTPUT_FLAG_PHONE;
         break;
+    case CAR_AUDIO_STREAM_REAR_SEAT:
+        out->usecase = USECASE_AUDIO_PLAYBACK_REAR_SEAT;
+        out->config = pcm_config_deep_buffer;
+        out->config.period_size = fp_get_output_period_size(out->sample_rate, out->format,
+                                        channels, DEEP_BUFFER_OUTPUT_PERIOD_DURATION);
+        if (out->config.period_size <= 0) {
+            ALOGE("Invalid configuration period size is not valid");
+            ret = -EINVAL;
+            goto error;
+        }
+        if (out->flags == AUDIO_OUTPUT_FLAG_NONE)
+            out->flags |= AUDIO_OUTPUT_FLAG_REAR_SEAT;
+        break;
     default:
         ALOGE("%s: Car audio stream %x not supported", __func__,
             out->car_audio_stream);
@@ -543,6 +557,9 @@
     case CAR_AUDIO_STREAM_PHONE:
         snd_device = SND_DEVICE_OUT_BUS_PHN;
         break;
+    case CAR_AUDIO_STREAM_REAR_SEAT:
+        snd_device = SND_DEVICE_OUT_BUS_RSE;
+        break;
     default:
         ALOGE("%s: Unknown car audio stream (%x)",
             __func__, out->car_audio_stream);

hal/audio_extn/utils.c

diff --git a/hal/audio_extn/utils.c b/hal/audio_extn/utils.c
index fe368e9..a29b6e5 100644
--- a/hal/audio_extn/utils.c
+++ b/hal/audio_extn/utils.c
@@ -150,6 +150,7 @@
     STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_SYS_NOTIFICATION),
     STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_NAV_GUIDANCE),
     STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_PHONE),
+    STRING_TO_ENUM(AUDIO_OUTPUT_FLAG_REAR_SEAT),
     STRING_TO_ENUM(AUDIO_INPUT_FLAG_NONE),
     STRING_TO_ENUM(AUDIO_INPUT_FLAG_FAST),
     STRING_TO_ENUM(AUDIO_INPUT_FLAG_HW_HOTWORD),