From 69f86c8d0f1f2d1adfd04f94bfd4580a3bc61d4c Mon Sep 17 00:00:00 2001
From: Sunny Kapdi <sunnyk@codeaurora.org>
Date: Tue, 22 Jan 2013 13:21:26 -0800
Subject: Bluetooth: Change Sampling Frequency to 48 kHz

Change Default Sampling Frequency to 48 kHz by default to
match Audio Source.
CRs-fixed: 436686
Change-Id: I0a4aa9ca61964e76220c77fa60c281f7a5df58b4
---
 audio_a2dp_hw/Android.mk      | 6 ++++++
 audio_a2dp_hw/audio_a2dp_hw.h | 5 +++++
 btif/co/bta_av_co.c           | 9 +++++++++
 btif/src/btif_media_task.c    | 7 ++++++-
 main/Android.mk               | 6 ++++++
 5 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/audio_a2dp_hw/Android.mk b/audio_a2dp_hw/Android.mk
index d98e4bb..bf00342 100644
--- a/audio_a2dp_hw/Android.mk
+++ b/audio_a2dp_hw/Android.mk
@@ -2,6 +2,12 @@ LOCAL_PATH:= $(call my-dir)
 
 include $(CLEAR_VARS)
 
+ifeq ($(BOARD_USES_ALSA_AUDIO),true)
+ifeq ($(TARGET_QCOM_AUDIO_VARIANT),caf)
+	LOCAL_CFLAGS += -DSAMPLE_RATE_48K
+endif
+endif
+
 LOCAL_SRC_FILES:= \
 	audio_a2dp_hw.c
 
diff --git a/audio_a2dp_hw/audio_a2dp_hw.h b/audio_a2dp_hw/audio_a2dp_hw.h
index 2015591..3076a6d 100644
--- a/audio_a2dp_hw/audio_a2dp_hw.h
+++ b/audio_a2dp_hw/audio_a2dp_hw.h
@@ -1,6 +1,7 @@
 /******************************************************************************
  *
  *  Copyright (C) 2009-2012 Broadcom Corporation
+ *  Copyright (c) 2013, Linux Foundation. All rights reserved.
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -35,7 +36,11 @@
 #define A2DP_CTRL_PATH "/data/misc/bluedroid/.a2dp_ctrl"
 #define A2DP_DATA_PATH "/data/misc/bluedroid/.a2dp_data"
 
+#ifdef SAMPLE_RATE_48K
+#define AUDIO_STREAM_DEFAULT_RATE          48000
+#else
 #define AUDIO_STREAM_DEFAULT_RATE          44100
+#endif
 #define AUDIO_STREAM_DEFAULT_FORMAT        AUDIO_FORMAT_PCM_16_BIT
 #define AUDIO_STREAM_DEFAULT_CHANNEL_FLAG  AUDIO_CHANNEL_OUT_STEREO
 #define AUDIO_STREAM_OUTPUT_BUFFER_SZ      (20*512)
diff --git a/btif/co/bta_av_co.c b/btif/co/bta_av_co.c
index 6089532..98f3708 100644
--- a/btif/co/bta_av_co.c
+++ b/btif/co/bta_av_co.c
@@ -1,6 +1,7 @@
 /******************************************************************************
  *
  *  Copyright (C) 2004-2012 Broadcom Corporation
+ *  Copyright (c) 2013, Linux Foundation. All rights reserved.
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -69,7 +70,11 @@ const UINT8 bta_av_co_cp_scmst[BTA_AV_CP_INFO_LEN] = "\x02\x02\x00";
 /* SBC codec capabilities */
 const tA2D_SBC_CIE bta_av_co_sbc_caps =
 {
+#ifdef SAMPLE_RATE_48K
+    (A2D_SBC_IE_SAMP_FREQ_48), /* samp_freq */
+#else
     (A2D_SBC_IE_SAMP_FREQ_44), /* samp_freq */
+#endif
     (A2D_SBC_IE_CH_MD_MONO | A2D_SBC_IE_CH_MD_STEREO | A2D_SBC_IE_CH_MD_JOINT | A2D_SBC_IE_CH_MD_DUAL), /* ch_mode */
     (A2D_SBC_IE_BLOCKS_16 | A2D_SBC_IE_BLOCKS_12 | A2D_SBC_IE_BLOCKS_8 | A2D_SBC_IE_BLOCKS_4), /* block_len */
     (A2D_SBC_IE_SUBBAND_4 | A2D_SBC_IE_SUBBAND_8), /* num_subbands */
@@ -79,8 +84,12 @@ const tA2D_SBC_CIE bta_av_co_sbc_caps =
 };
 
 #if !defined(BTIF_AV_SBC_DEFAULT_SAMP_FREQ)
+#ifdef SAMPLE_RATE_48K
+#define BTIF_AV_SBC_DEFAULT_SAMP_FREQ A2D_SBC_IE_SAMP_FREQ_48
+#else
 #define BTIF_AV_SBC_DEFAULT_SAMP_FREQ A2D_SBC_IE_SAMP_FREQ_44
 #endif
+#endif
 
 /* Default SBC codec configuration */
 const tA2D_SBC_CIE btif_av_sbc_default_config =
diff --git a/btif/src/btif_media_task.c b/btif/src/btif_media_task.c
index 8978cf6..bda0d9f 100755
--- a/btif/src/btif_media_task.c
+++ b/btif/src/btif_media_task.c
@@ -1,6 +1,7 @@
 /******************************************************************************
  *
  *  Copyright (C) 2009-2012 Broadcom Corporation
+ *  Copyright (c) 2013, Linux Foundation. All rights reserved.
  *
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -764,8 +765,12 @@ void btif_a2dp_setup_codec(void)
 
     GKI_disable();
 
-    /* for now hardcode 44.1 khz 16 bit stereo */
+    /* for now hardcode 44/48 khz 16 bit stereo */
+#ifdef SAMPLE_RATE_48K
+    media_feeding.cfg.pcm.sampling_freq = 48000;
+#else
     media_feeding.cfg.pcm.sampling_freq = 44100;
+#endif
     media_feeding.cfg.pcm.bit_per_sample = 16;
     media_feeding.cfg.pcm.num_channel = 2;
     media_feeding.format = BTIF_AV_CODEC_PCM;
diff --git a/main/Android.mk b/main/Android.mk
index 8ecb3c3..23a9783 100644
--- a/main/Android.mk
+++ b/main/Android.mk
@@ -6,6 +6,12 @@ LOCAL_PATH:= $(call my-dir)
 
 include $(CLEAR_VARS)
 
+ifeq ($(BOARD_USES_ALSA_AUDIO),true)
+ifeq ($(TARGET_QCOM_AUDIO_VARIANT),caf)
+	LOCAL_CFLAGS += -DSAMPLE_RATE_48K
+endif
+endif
+
 # HAL layer
 LOCAL_SRC_FILES:= \
 	../btif/src/bluetooth.c
-- 
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