void A2MPHandleReadLocalAMPInfo(const BtEvent *Event)
{
BtA2MPGetInfoRsp result;
U8 *parm;
U8 controllerId;
U8 i=0;
A2MP_MAIN_CONN *main_channel;
parm = (U8 *)Event->p.hciAmpEvent.parms;
result.controllerId = Event->p.hciAmpEvent.controllerId;
if(Event->errCode ==0)
result.status = 0x00; /* AMP get info response success*/
else
result.status = 0x01; /* AMP get info response failed */
result.total_bandwidth = LEtoHost32(parm+2);
result.max_guarantee_bandwidth = LEtoHost32(parm+6);
result.min_latency = LEtoHost32(parm+10);
result.max_pdu_size = LEtoHost32(parm+14);
result.controller_type = parm[18];
result.pal_capability = LEtoHost16(parm+19);
result.max_amp_assoc_length = LEtoHost16(parm+21);
result.max_flush_timeout = LEtoHost32(parm+23);
result.best_effort_flush_timeout= LEtoHost32(parm+27);
for(i=0;i<NUM_BT_DEVICES; i++)
{
if(A2MPC(a2mp_main_channel)[i].state == A2MP_STATE_ALLOCATED)
{
main_channel = &A2MPC(a2mp_main_channel)[i];
if(main_channel->last_rxCmdopcode == A2MP_CODE_GET_INFO_REQ)
{
BTA2MP_SendGetInfoResponse(main_channel->remDev, &result);
main_channel->last_rxCmdopcode = A2MP_CODE_INVALID;
}
}
}
}
int encodec_sbc(
U8 min_bit_pool,
U8 block_len, // b0: 16, b1: 12, b2: 8, b3: 4
U8 subband_num, // b0: 8, b1: 4
U8 alloc_method, // b0: loudness, b1: SNR
U8 sample_rate, // b0: 48000, b1: 44100, b2: 32000, b3: 16000
U8 channel_mode // b0: joint stereo, b1: stereo, b2: dual channel, b3: mono
)
{
FILE *wavIn, *sbcOut;
SbcPcmData pcmData;
SbcEncoder encoder;
U16 bytesToRead;
U16 bytesToEncode;
U16 bytesEncoded;
XaStatus status;
U8 *fNameIn;
U8 *fNameOut;
U32 sampleFreq = 0;
U32 chunk2Size = 0;
U16 sbcLen;
U8 pathBuf[_MAX_PATH] = {0};
int encodedFrameLen;
/* Initialize default encoder settings */
SBC_InitEncoder(&encoder);
fNameOut = BT_A2DP_SBC_FILE;
switch(sample_rate)
{
case 0x01: /* 48.0K*/
fNameIn = (U8 *)&BT_A2DP_SRC48_FILE;
break;
case 0x02:
fNameIn = (U8 *)&BT_A2DP_SRC44_FILE;
break;
case 0x04:
fNameIn = (U8 *)&BT_A2DP_SRC32_FILE;
break;
case 0x08:
fNameIn = (U8 *)&BT_A2DP_SRC16_FILE;
break;
}
switch(block_len)
{
case 0x01:
encoder.streamInfo.numBlocks = 16;
break;
case 0x02:
encoder.streamInfo.numBlocks = 12;
break;
case 0x04:
encoder.streamInfo.numBlocks = 8;
break;
case 0x08:
encoder.streamInfo.numBlocks = 4;
break;
}
switch(subband_num)
{
case 0x01:
encoder.streamInfo.numSubBands = 8;
break;
case 0x02:
encoder.streamInfo.numSubBands = 4;
break;
}
switch(alloc_method)
{
case 0x01:
encoder.streamInfo.allocMethod = SBC_ALLOC_METHOD_LOUDNESS;
break;
case 0x02:
encoder.streamInfo.allocMethod = SBC_ALLOC_METHOD_SNR;
break;
}
switch(channel_mode)
{
case 0x01:
encoder.streamInfo.channelMode = SBC_CHNL_MODE_JOINT_STEREO;
break;
case 0x02:
encoder.streamInfo.channelMode = SBC_CHNL_MODE_STEREO;
break;
case 0x04:
encoder.streamInfo.channelMode = SBC_CHNL_MODE_DUAL_CHNL;
break;
case 0x08:
encoder.streamInfo.channelMode = SBC_CHNL_MODE_MONO;
break;
}
encoder.streamInfo.bitPool = min_bit_pool;
#if 0
encoder.streamInfo.numBlocks = 16;
encoder.streamInfo.numSubBands = 8;
encoder.streamInfo.allocMethod = SBC_ALLOC_METHOD_LOUDNESS;
encoder.streamInfo.channelMode = SBC_CHNL_MODE_JOINT_STEREO;
encoder.streamInfo.bitPool = 35;
#endif
/* Open the WAV file */
memset(pathBuf, 0, sizeof(pathBuf));
translateFilePath(fNameIn, pathBuf);
wavIn = fopen(pathBuf, "rb");
if(wavIn == NULL)
return -1;
memset(pathBuf, 0, sizeof(pathBuf));
OS_MemSet(pathBuf, 0, sizeof(pathBuf));
translateFilePath(fNameOut, pathBuf);
sbcOut = fopen(pathBuf, "wb");
if(sbcOut == NULL)
return -1;
/**** Parse the WAV header ****/
if (fread(pcmBuffer, 1, 4, wavIn) == 4) {
if (memcmp(pcmBuffer, "RIFF", 4) != 0) {
printf("Invalid RIFF file format\n");
return -1;
}
} else {
printf("Error reading WAV file\n");
return -1;
}
/* Read format */
fseek(wavIn, 8, 0);
if (fread(pcmBuffer, 1, 4, wavIn) == 4) {
if (memcmp(pcmBuffer, "WAVE", 4) != 0) {
printf("Invalid WAV format\n");
return -1;
}
} else {
printf("Error reading WAV file\n");
return -1;
}
/**** Start subchunk 1 ****/
fseek(wavIn, 12, 0);
if (fread(pcmBuffer, 1, 4, wavIn) == 4) {
if (memcmp(pcmBuffer, "fmt", 3) != 0) {
printf("Invalid format chunk\n");
return -1;
}
} else {
printf("Error reading WAV file\n");
return -1;
}
/* PCM */
fseek(wavIn, 20, 0);
if (fread(pcmBuffer, 1, 2, wavIn) == 2) {
if (LEtoHost16(pcmBuffer) != 1) {
printf("Unsupported audio format\n");
return -1;
}
} else {
printf("Error reading WAV file\n");
return -1;
}
/* Channels */
if (fread(pcmBuffer, 1, 2, wavIn) == 2) {
encoder.streamInfo.numChannels = pcmBuffer[0];
} else {
printf("Error reading WAV file\n");
return -1;
}
/* Sample frequency */
if (fread(pcmBuffer, 1, 4, wavIn) == 4) {
sampleFreq = LEtoHost32(pcmBuffer);
switch (sampleFreq) {
case 48000:
encoder.streamInfo.sampleFreq = SBC_CHNL_SAMPLE_FREQ_48;
break;
case 44100:
encoder.streamInfo.sampleFreq = SBC_CHNL_SAMPLE_FREQ_44_1;
break;
case 32000:
encoder.streamInfo.sampleFreq = SBC_CHNL_SAMPLE_FREQ_32;
break;
case 16000:
encoder.streamInfo.sampleFreq = SBC_CHNL_SAMPLE_FREQ_16;
break;
default:
printf("Unsupported sampling frequency %d\n", sampleFreq);
return -1;
}
} else {
printf("Error reading WAV file\n");
return -1;
}
/* Bits per sample */
fseek(wavIn, 34, 0);
if (fread(pcmBuffer, 1, 2, wavIn) == 2) {
if (LEtoHost32(pcmBuffer) != 16) {
printf("Unsupported sample size\n");
}
}
/**** Data chunk ****/
fseek(wavIn, 44, 0);
/* Print out SBC format */
printf("Start\n");
printf("Sampling Frequency = %d\n", sampleFreq);
if (encoder.streamInfo.numChannels == 1) {
if (encoder.streamInfo.channelMode != SBC_CHNL_MODE_MONO) {
printf("Switching to mono mode...\n");
}
encoder.streamInfo.channelMode = SBC_CHNL_MODE_MONO;
printf("Mode = Mono\n");
} else {
switch (encoder.streamInfo.channelMode) {
case SBC_CHNL_MODE_JOINT_STEREO:
printf("Mode = Joint Stereo\n");
break;
case SBC_CHNL_MODE_STEREO:
printf("Mode = Stereo\n");
break;
case SBC_CHNL_MODE_DUAL_CHNL:
printf("Mode = Dual Channel\n");
break;
default:
printf("Mode = Unknown\n");
}
}
printf("Blocks = %d\n", encoder.streamInfo.numBlocks);
printf("Subbands = %d\n", encoder.streamInfo.numSubBands);
if (encoder.streamInfo.allocMethod == SBC_ALLOC_METHOD_SNR) {
printf("Allocation = SNR\n");
} else if(encoder.streamInfo.allocMethod == SBC_ALLOC_METHOD_LOUDNESS) {
printf("Allocation = LOUDNESS\n");
} else {
printf("Allocation = Unknown\n");
}
printf("Bitpool = %d\n", encoder.streamInfo.bitPool);
/* Initialize PCM data structure */
pcmData.data = pcmBuffer;
bytesToRead = encoder.streamInfo.numChannels *
encoder.streamInfo.numSubBands *
encoder.streamInfo.numBlocks * 2;
bytesToRead = (PCM_BUFF_SIZE / bytesToRead) * bytesToRead;
/* Start reading the SBC data and encoding */
while ((bytesToEncode = fread(pcmBuffer, 1, bytesToRead, wavIn))) {
pcmData.data = pcmBuffer;
pcmData.dataLen = bytesToEncode;
while (bytesToEncode) {
/* Encode the PCM buffer into the SBC buffer */
status = SBC_EncodeFrames(&encoder, &pcmData, &bytesEncoded,
sbcBuffer, &sbcLen, SBC_BUFF_SIZE);
bytesToEncode -= bytesEncoded;
pcmData.data += bytesEncoded;
pcmData.dataLen -= bytesEncoded;
if (status == XA_STATUS_SUCCESS) {
/* Block encoded */
if (fwrite(sbcBuffer, 1, sbcLen, sbcOut) != sbcLen) {
printf("Error writing SBC data\n");
return -1;
}
} else if (status != XA_STATUS_CONTINUE) {
/* Parsing error */
printf("Error encoding SBC stream\n");
return -1;
} else {
/* Not enough data left to encode a frame */
break;
}
}
}
printf("Done\n");
fclose(wavIn);
fclose(sbcOut);
encodedFrameLen = SBC_FrameLen(&encoder.streamInfo);
return encodedFrameLen;
}