CSR867x — Source支持一拖二时codec配置的优化

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写在前面：CSR的平台做Source，可以支持一拖二的场景；但在一拖二时两个从机必须配置为相同的codec，且只能为SBC, FASTSTREAM和 APTX其中一种。局限于平台的资源，一拖二时两个从机的声音会有不一致，一快一慢。

1、参考文档，第5章节有关dual stream的部分；

2、Source端会根据自身支持的codec，针对每一个从机协商出对应的codec类型，当两个从机协商的codec不一致时，就需要reconfig；原生代码中，重新配置时还是无法达到从机codec一致的结果，所以就会出现两个从机都没有声音或者一个从机没有声音的问题。如图

3、所以修改为下面这样，如图

    此时配置过程和打印的log如下：

设备0：只能支持SBC
设备1：同时支持SBC、APTX、APTX-LL

                          设备0    设备1       状态      结果
第一次配置：        1          4            不同    没声音
第二次配置：        1          3            不同    没声音
第三次配置：        1          1            相同    有声音

bdaddr [0x2:0x5b:0xff04]
app  memory =14
    got free instance
A2DP: a2dp_start_connection bdaddr [0x2:0x5b:0xff04]
app  memory =15
A2DP_INTERNAL_SIGNALLING_CONNECT_REQ:
        inst[0x200f]
A2DP STATE: new state [Connecting Local]
A2DP_INTERNAL_MEDIA_SUSPEND_REQ:
        inst[0x2000]
A2DP STATE: new state [Media Suspending Local]
A2DP CL_SDP_SERVICE_SEARCH_CFM status = 0
A2DP SDP ok, issue connect
A2DP_SIGNALLING_CONNECT_CFM 0:
    instance from bdaddr
        inst[0x200f]
  device ID:[0x1]
A2DP STATE: new state [Connected Signalling]
 bdaddr [0x2:0x5b:0xff04]
PS: Write new device - addr already exists as main device
A2DP_SIGNALLING_CONNECT_CFM 0:
    instance from bdaddr
        inst[0x200f]
A2DP MSG Ignored; state[3] inst[0x200f]
app  memory =16
app  memory =16
A2DP a2dp_route_all_audio   Start ind = 0 ; statue1 
A2DP a2dp_route_all_audio   Start ind = 1 ; statue1 
    instance from bdaddr
A2DP SBC bitpool [48] bad_link_bitpool[48]
A2DP new role [0]
A2DP_INTERNAL_CONNECT_AUDIO_REQ:
        inst[0x2000]
suspend: send media start
A2DP_INTERNAL_CONNECT_AUDIO_REQ:
        inst[0x200f]
SetState conn_media_local
A2DP STATE: new state [Connecting Media Local]
A2DP: Preferred List:
    ID:[0x4] Pref:[0x1]
    ID:[0x3] Pref:[0x2]
    ID:[0x1] Pref:[0x3]
A2DP: A2dpMediaOpenRequest True:
A2DP CL_DM_REMOTE_FEATURES_CFM
A2DP SBC bitpool [48] bad_link_bitpool[48]
A2DP link quality [3]
app  memory =16
A2DP a2dp_route_all_audio   Start ind = 0 ; statue1 
A2DP a2dp_route_all_audio   Start ind = 1 ; statue1 
A2DP_INTERNAL_CONNECT_AUDIO_REQ:
        inst[0x2000]
suspend: send media start
A2DP_INTERNAL_CONNECT_AUDIO_REQ:
        inst[0x200f]
a2dp_msg_internal_connect_audio_req unhandled 4
A2DP MSG Ignored; state[4] inst[0x200f]
A2DP_MEDIA_OPEN_CFM 0:
    instance from deviceID 1
        inst[0x200f]
  device ID:[0x1]
  stream ID [0x0]
  stream end point ID [0x4]
AUDIO: audio_a2dp_set_plugin [4]
A2DP STATE: new state [Connected Media]
 &&&&&A2DP_INTERN 1 ,4:
 &&&&&A2DP_INTERN  xcscAL_MEDIA_CLOSE_REQ:
 &&&&&A2DP_INTERN  xcscAL_MEDIA_CLOSE_REQ:
A2DP_INTERNAL_MEDIA_CLOSE_REQ:
        inst[0x2000]
A2DP STATE: new state [Disconnecting Media]
A2DP_INTERNAL_MEDIA_CLOSE_REQ:
        inst[0x200f]
A2DP STATE: new state [Disconnecting Media]
A2DP_MEDIA_CLOSE_IND:
    instance from deviceID 1
        inst[0x200f]
A2DP STATE: new state [Connected Signalling]
A2DP_INTERNAL_MEDIA_OPEN_REQ:
        inst[0x200f]
A2DP STATE: new state [Connecting Media Local]
A2DP: Preferred List:
    ID:[0x3] Pref:[0x1]
    ID:[0x1] Pref:[0x2]
A2DP: A2dpMediaOpenRequest True:
A2DP_MEDIA_CLOSE_IND:
    instance from deviceID 0
        inst[0x2000]
A2DP STATE: new state [Connected Signalling]
A2DP_INTERNAL_MEDIA_START_REQ:
        inst[0x2000]
A2DP MSG Ignored; state[3] inst[0x2000]
A2DP_INTERNAL_MEDIA_START_REQ:
        inst[0x2000]
A2DP MSG Ignored; state[3] inst[0x2000]
A2DP_SIGNALLING_DISCONNECT_IND:
    instance from deviceID 0
        inst[0x2000]
A2DP: a2dp_init_instance inst[0x2000]
A2DP STATE: new state [Disconnected]
AUDIO: Switch Audio Mode
app  memory =16
app  memory =15
app  memory =16
 bdaddr [0x2:0x5b:0xff04]
A2DP_MEDIA_OPEN_CFM 0:
    instance from deviceID 1
        inst[0x200f]
  device ID:[0x1]
  stream ID [0x0]
  stream end point ID [0x3]
AUDIO: audio_a2dp_set_plugin [3]
A2DP STATE: new state [Connected Media]
A2DP_INTERNAL_MEDIA_START_REQ:
        inst[0x200f]
A2DP STATE: new state [Media Starting Local]
A2DP_MEDIA_START_CFM 0:
    instance from deviceID 1
        inst[0x200f]
A2DP STATE: new state [Media Streaming]
AUDIO: audio_a2dp_connect
  audio_routed [0] input_source [0x2ea5] input_sink [0x0] a2dp_sink_0 [0x0] a2dp_sink_1 [0xba7f]
  codec ; voice_rate[0x0] packet_size[0x29c] bitpool[0x0] format[0x0]
PS: Write new device - addr already exists as main device
 bdaddr [0xfc58:0xfa:0x3111b9]
 bdaddr [0xfc58:0xfa:0x3111b9]
PS: Write new device - addr already exists as 2nd device
app  memory =15
A2DP_SIGNALLING_CONNECT_IND:
    got free instance
        inst[0x2000]
 bdaddr [0xfc58:0xfa:0x3111b9]
A2DP STATE: new state [Connecting Remote]
 bdaddr [0xfc58:0xfa:0x3111b9]
  accept = 1
A2DP_SIGNALLING_CONNECT_CFM 0:
    instance from bdaddr
        inst[0x2000]
  device ID:[0x0]
A2DP STATE: new state [Connected Signalling]
 bdaddr [0xfc58:0xfa:0x3111b9]
PS: Write new device - addr already exists as 2nd device
app  memory =15
    instance from bdaddr
A2DP new role [1]
A2DP CL_DM_REMOTE_FEATURES_CFM
A2DP link quality [3]
app  memory =15
A2DP a2dp_route_all_audio   Start ind = 0 ; statue1 
A2DP a2dp_route_all_audio   Start ind = 1 ; statue1 
    instance from bdaddr
A2DP new role [0]
A2DP_INTERNAL_CONNECT_AUDIO_REQ:
        inst[0x2000]
SetState conn_media_local
A2DP STATE: new state [Connecting Media Local]
A2DP: Preferred List:
    ID:[0x4] Pref:[0x1]
    ID:[0x3] Pref:[0x2]
    ID:[0x1] Pref:[0x3]
A2DP: A2dpMediaOpenRequest True:
A2DP_INTERNAL_CONNECT_AUDIO_REQ:
        inst[0x200f]
media streaming
A2DP_MEDIA_OPEN_CFM 0:
    instance from deviceID 0
        inst[0x2000]
  device ID:[0x0]
  stream ID [0x0]
  stream end point ID [0x1]
AUDIO: audio_a2dp_set_plugin [1]
A2DP STATE: new state [Connected Media]
 &&&&&A2DP_INTERN 1 ,3:
 &&&&&A2DP_INTERN  xcscAL_MEDIA_CLOSE_REQ:
 &&&&&A2DP_INTERN  xcscAL_MEDIA_CLOSE_REQ:
A2DP_INTERNAL_MEDIA_CLOSE_REQ:
        inst[0x2000]
A2DP STATE: new state [Disconnecting Media]
A2DP_INTERNAL_MEDIA_CLOSE_REQ:
        inst[0x200f]
A2DP STATE: new state [Disconnecting Media]
 bdaddr [0xfc58:0xfa:0x3111b9]
A2DP_MEDIA_CLOSE_IND:
    instance from deviceID 0
        inst[0x2000]
A2DP STATE: new state [Connected Signalling]
A2DP_INTERNAL_MEDIA_OPEN_REQ:
        inst[0x2000]
A2DP STATE: new state [Connecting Media Local]
A2DP: Preferred List:
    ID:[0x3] Pref:[0x1]
    ID:[0x1] Pref:[0x2]
A2DP: A2dpMediaOpenRequest True:
A2DP_MEDIA_CLOSE_IND:
    instance from deviceID 1
        inst[0x200f]
A2DP STATE: new state [Connected Signalling]
A2DP_INTERNAL_MEDIA_OPEN_REQ:
        inst[0x200f]
A2DP STATE: new state [Connecting Media Local]
A2DP: Preferred List:
    ID:[0x1] Pref:[0x1]
A2DP: A2dpMediaOpenRequest True:
A2DP_MEDIA_OPEN_CFM 0:
    instance from deviceID 0
        inst[0x2000]
  device ID:[0x0]
  stream ID [0x0]
  stream end point ID [0x1]
AUDIO: audio_a2dp_set_plugin [1]
A2DP STATE: new state [Connected Media]
A2DP_INTERNAL_MEDIA_START_REQ:
        inst[0x2000]
A2DP STATE: new state [Media Starting Local]
A2DP_MEDIA_START_CFM 0:
    instance from deviceID 0
        inst[0x2000]
A2DP STATE: new state [Media Streaming]
AUDIO: audio_a2dp_connect
  audio_routed [0] input_source [0x2ea5] input_sink [0x0] a2dp_sink_0 [0xba72] a2dp_sink_1 [0x0]
  codec ; voice_rate[0x0] packet_size[0x29c] bitpool[0x30] format[0xfd]
A2DP SBC bitpool [48] bad_link_bitpool[48]
PS: Write new device - addr already exists as 2nd device
A2DP_MEDIA_OPEN_CFM 0:
    instance from deviceID 1
        inst[0x200f]
  device ID:[0x1]
  stream ID [0x0]
  stream end point ID [0x1]
AUDIO: audio_a2dp_set_plugin [1]
A2DP STATE: new state [Connected Media]
 &&&&&A2DP_INTERN 1 ,1:
A2DP_INTERNAL_MEDIA_START_REQ:
        inst[0x200f]
A2DP STATE: new state [Media Starting Local]
A2DP_MEDIA_START_CFM 0:
    instance from deviceID 1
        inst[0x200f]
A2DP STATE: new state [Media Streaming]
 &&&&&A2DP_INTERN 1 ,1:
AUDIO: audio_a2dp_connect
A2DP SBC bitpool [48] bad_link_bitpool[48]
  audio_routed [1] connect_sink [0xba6e] bitpool [48] bad_link_bitpool [48]
PS: Write new device - addr already exists as main device