mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-12-18 20:34:23 -05:00
75 lines
3.2 KiB
Diff
75 lines
3.2 KiB
Diff
|
From 133e43eb4f5339e584dc2dcc3f02a34711c93571 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Tad <tad@spotco.us>
|
||
|
|
Date: Thu, 23 Aug 2018 22:16:42 -0400
|
||
|
|
Subject: [PATCH] Improve Bluetooth audio quality, credit @ValdikSS
|
||
|
|
|
||
|
|
Change-Id: I98f5b84982aaf446e5adfb622993ee11f4592f64
|
||
|
|
See: https://forum.xda-developers.com/android/software-hacking/improve-bluetooth-audio-quality-t3832615
|
||
|
|
---
|
||
|
|
stack/a2dp/a2dp_sbc.cc | 14 +++++++-------
|
||
|
|
stack/a2dp/a2dp_sbc_encoder.cc | 2 +-
|
||
|
|
2 files changed, 8 insertions(+), 8 deletions(-)
|
||
|
|
|
||
|
|
diff --git a/stack/a2dp/a2dp_sbc.cc b/stack/a2dp/a2dp_sbc.cc
|
||
|
|
index cfdaad4c..1416d4c3 100644
|
||
|
|
--- a/stack/a2dp/a2dp_sbc.cc
|
||
|
|
+++ b/stack/a2dp/a2dp_sbc.cc
|
||
|
|
@@ -55,7 +55,7 @@ typedef struct {
|
||
|
|
/* SBC SRC codec capabilities */
|
||
|
|
static const tA2DP_SBC_CIE a2dp_sbc_caps = {
|
||
|
|
A2DP_SBC_IE_SAMP_FREQ_44, /* samp_freq */
|
||
|
|
- (A2DP_SBC_IE_CH_MD_MONO | A2DP_SBC_IE_CH_MD_JOINT), /* ch_mode */
|
||
|
|
+ (A2DP_SBC_IE_CH_MD_MONO | A2DP_SBC_IE_CH_MD_JOINT | A2DP_SBC_IE_CH_MD_DUAL), /* ch_mode */
|
||
|
|
(A2DP_SBC_IE_BLOCKS_16 | A2DP_SBC_IE_BLOCKS_12 | A2DP_SBC_IE_BLOCKS_8 |
|
||
|
|
A2DP_SBC_IE_BLOCKS_4), /* block_len */
|
||
|
|
A2DP_SBC_IE_SUBBAND_8, /* num_subbands */
|
||
|
|
@@ -82,7 +82,7 @@ static const tA2DP_SBC_CIE a2dp_sbc_sink_caps = {
|
||
|
|
/* Default SBC codec configuration */
|
||
|
|
const tA2DP_SBC_CIE a2dp_sbc_default_config = {
|
||
|
|
A2DP_SBC_IE_SAMP_FREQ_44, /* samp_freq */
|
||
|
|
- A2DP_SBC_IE_CH_MD_JOINT, /* ch_mode */
|
||
|
|
+ A2DP_SBC_IE_CH_MD_DUAL, /* ch_mode */
|
||
|
|
A2DP_SBC_IE_BLOCKS_16, /* block_len */
|
||
|
|
A2DP_SBC_IE_SUBBAND_8, /* num_subbands */
|
||
|
|
A2DP_SBC_IE_ALLOC_MD_L, /* alloc_method */
|
||
|
|
@@ -1154,6 +1154,11 @@ static bool select_audio_bits_per_sample(
|
||
|
|
//
|
||
|
|
static bool select_best_channel_mode(uint8_t ch_mode, tA2DP_SBC_CIE* p_result,
|
||
|
|
btav_a2dp_codec_config_t* p_codec_config) {
|
||
|
|
+ if (ch_mode & A2DP_SBC_IE_CH_MD_DUAL) {
|
||
|
|
+ p_result->ch_mode = A2DP_SBC_IE_CH_MD_DUAL;
|
||
|
|
+ p_codec_config->channel_mode = BTAV_A2DP_CODEC_CHANNEL_MODE_STEREO;
|
||
|
|
+ return true;
|
||
|
|
+ }
|
||
|
|
if (ch_mode & A2DP_SBC_IE_CH_MD_JOINT) {
|
||
|
|
p_result->ch_mode = A2DP_SBC_IE_CH_MD_JOINT;
|
||
|
|
p_codec_config->channel_mode = BTAV_A2DP_CODEC_CHANNEL_MODE_STEREO;
|
||
|
|
@@ -1164,11 +1169,6 @@ static bool select_best_channel_mode(uint8_t ch_mode, tA2DP_SBC_CIE* p_result,
|
||
|
|
p_codec_config->channel_mode = BTAV_A2DP_CODEC_CHANNEL_MODE_STEREO;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
- if (ch_mode & A2DP_SBC_IE_CH_MD_DUAL) {
|
||
|
|
- p_result->ch_mode = A2DP_SBC_IE_CH_MD_DUAL;
|
||
|
|
- p_codec_config->channel_mode = BTAV_A2DP_CODEC_CHANNEL_MODE_STEREO;
|
||
|
|
- return true;
|
||
|
|
- }
|
||
|
|
if (ch_mode & A2DP_SBC_IE_CH_MD_MONO) {
|
||
|
|
p_result->ch_mode = A2DP_SBC_IE_CH_MD_MONO;
|
||
|
|
p_codec_config->channel_mode = BTAV_A2DP_CODEC_CHANNEL_MODE_MONO;
|
||
|
|
diff --git a/stack/a2dp/a2dp_sbc_encoder.cc b/stack/a2dp/a2dp_sbc_encoder.cc
|
||
|
|
index e4c20499..8b3731d1 100644
|
||
|
|
--- a/stack/a2dp/a2dp_sbc_encoder.cc
|
||
|
|
+++ b/stack/a2dp/a2dp_sbc_encoder.cc
|
||
|
|
@@ -39,7 +39,7 @@
|
||
|
|
#define A2DP_SBC_ENCODER_INTERVAL_MS 20
|
||
|
|
|
||
|
|
/* High quality quality setting @ 44.1 khz */
|
||
|
|
-#define A2DP_SBC_DEFAULT_BITRATE 328
|
||
|
|
+#define A2DP_SBC_DEFAULT_BITRATE 512
|
||
|
|
|
||
|
|
#define A2DP_SBC_NON_EDR_MAX_RATE 229
|
||
|
|
|
||
|
|
--
|
||
|
|
2.18.0
|
||
|
|
|