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https://github.com/Divested-Mobile/DivestOS-Build.git
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51 lines
1.7 KiB
Diff
51 lines
1.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: ValdikSS <iam@valdikss.org.ru>
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Date: Fri, 21 Sep 2018 13:53:11 +0300
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Subject: [PATCH] Increase maximum Bluetooth SBC codec bitrate for SBC HD
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This commit increases maximum possible bitrate to 452 kbit/s for 44.1 kHz,
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492 kbit/s for 48 kHz, which is optimal for both
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EDR 2 mbit/s (4 audio frames, 11.7 ms, 6 wasted bytes) and
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EDR 3 mbit/s (6 audio frames, 17.5 ms, 20 wasted bytes).
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It does not increase bitpool value and won't introduce higher bitrates for
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modes other than SBC Dual Channel.
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Test: manual, with various headphones, receivers, and speakers
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Change-Id: I5c9dec8848a8017da5b1fc6a5edfbbea5bdcb7eb
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---
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btif/src/btif_media_task.c | 8 ++++----
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1 file changed, 4 insertions(+), 4 deletions(-)
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diff --git a/btif/src/btif_media_task.c b/btif/src/btif_media_task.c
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index 977d2668d..cac0c2211 100644
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--- a/btif/src/btif_media_task.c
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+++ b/btif/src/btif_media_task.c
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@@ -208,13 +208,13 @@ enum {
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#endif
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#ifdef BTA_AV_SPLIT_A2DP_DEF_FREQ_48KHZ
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-#define BTIF_A2DP_DEFAULT_BITRATE 345
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+#define BTIF_A2DP_DEFAULT_BITRATE 496
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#ifndef BTIF_A2DP_NON_EDR_MAX_RATE
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#define BTIF_A2DP_NON_EDR_MAX_RATE 237
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#endif
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#else
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-#define BTIF_A2DP_DEFAULT_BITRATE 328
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+#define BTIF_A2DP_DEFAULT_BITRATE 455
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#ifndef BTIF_A2DP_NON_EDR_MAX_RATE
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#define BTIF_A2DP_NON_EDR_MAX_RATE 229
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@@ -227,8 +227,8 @@ enum {
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#else
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#define A2DP_HDR_SIZE 1
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#endif
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-#define MAX_SBC_HQ_FRAME_SIZE_44_1 119
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-#define MAX_SBC_HQ_FRAME_SIZE_48 115
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+#define MAX_SBC_HQ_FRAME_SIZE_44_1 165
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+#define MAX_SBC_HQ_FRAME_SIZE_48 165
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/* 2DH5 payload size of 679 bytes - (4 bytes L2CAP Header + 12 bytes AVDTP Header) */
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#define MAX_2MBPS_AVDTP_MTU 663
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