QCC 音频输入输出

QCC蓝牙芯片（QCC3040 QCC3083 QCC3084 QCC5181 等等）支持DAC、I2S、SPDIF输出，AUX、I2S、SPDIF、A2DP 输入

蓝牙音频输入，模拟输出是最常见的方式。
也可以再此基础上动态切换输入方式。
输入方式切换参考
static void kymeraWiredAnalog_StartChains(kymeraTaskData *theKymera)
{
bool connected;

Source line_in_l = SourcekymeraWiredAnalog_GetSource(appConfigLeftAudioChannel(), appConfigLeftAudioInstance(), KymeraOutput_GetMainSampleRate() /* for now input/output rate are same */);
Source line_in_r = SourcekymeraWiredAnalog_GetSource(appConfigRightAudioChannel(), appConfigRightAudioInstance(), KymeraOutput_GetMainSampleRate() /* for now input/output rate are same */);
/* if stereo, then synchronize */
if(line_in_r)
    SourceSynchronise(line_in_l, line_in_r);

DEBUG_LOG("kymeraWiredAnalog_StartChains");
/* The media source may fail to connect to the input chain if the source
disconnects between the time wired analog audio asks Kymera to start and this
function being called. wired analog audio will subsequently ask Kymera to stop. */
connected = ChainConnectInput(theKymera->chain_input_handle, line_in_l, EPR_WIRED_STEREO_INPUT_L);
if(line_in_r)
    connected = ChainConnectInput(theKymera->chain_input_handle, line_in_r, EPR_WIRED_STEREO_INPUT_R);

/* Start the output chain regardless of whether the source was connected
to the input chain. Failing to do so would mean audio would be unable
to play a tone. This would cause kymera to lock, since it would never
receive a KYMERA_OP_MSG_ID_TONE_END and the kymera lock would never
be cleared. */
KymeraOutput_ChainStart();
Kymera_StartMusicProcessingChain();

if (connected)
    ChainStart(theKymera->chain_input_handle);

} 在这里插入图片描述