char *CAStreamBasicDescription::AsString(char *buf, size_t bufsize) const
{
char *theBuffer = buf;
int nc;
char formatID[5];
*(UInt32 *)formatID = CFSwapInt32HostToBig(mFormatID);
formatID[4] = '\0';
nc = snprintf(buf, bufsize, "%2d ch, %6.0f Hz, '%-4.4s' (0x%08X) ", (int)NumberChannels(), mSampleRate, formatID, (int)mFormatFlags);
buf += nc; bufsize -= nc;
if (mFormatID == kAudioFormatLinearPCM)
{
bool isInt = !(mFormatFlags & kLinearPCMFormatFlagIsFloat);
int wordSize = SampleWordSize();
const char *endian = (wordSize > 1) ?
((mFormatFlags & kLinearPCMFormatFlagIsBigEndian) ? " big-endian" : " little-endian" ) : "";
const char *sign = isInt ?
((mFormatFlags & kLinearPCMFormatFlagIsSignedInteger) ? " signed" : " unsigned") : "";
const char *floatInt = isInt ? "integer" : "float";
char packed[32];
if (wordSize > 0 && PackednessIsSignificant())
{
if (mFormatFlags & kLinearPCMFormatFlagIsPacked)
sprintf(packed, "packed in %d bytes", wordSize);
else
sprintf(packed, "unpacked in %d bytes", wordSize);
} else
packed[0] = '\0';
const char *align = (wordSize > 0 && AlignmentIsSignificant()) ?
((mFormatFlags & kLinearPCMFormatFlagIsAlignedHigh) ? " high-aligned" : " low-aligned") : "";
const char *deinter = (mFormatFlags & kAudioFormatFlagIsNonInterleaved) ? ", deinterleaved" : "";
const char *commaSpace = (packed[0]!='\0') || (align[0]!='\0') ? ", " : "";
char bitdepth[20];
#if CA_PREFER_FIXED_POINT
int fracbits = (mFormatFlags & kLinearPCMFormatFlagsSampleFractionMask) >> kLinearPCMFormatFlagsSampleFractionShift;
if (fracbits > 0)
sprintf(bitdepth, "%d.%d", (int)mBitsPerChannel - fracbits, fracbits);
else
#endif
sprintf(bitdepth, "%d", (int)mBitsPerChannel);
nc = snprintf(buf, bufsize, "%s-bit%s%s %s%s%s%s%s",
bitdepth, endian, sign, floatInt,
commaSpace, packed, align, deinter);
//buf += nc; bufsize -= nc;
} else if (mFormatID == 'alac') { // kAudioFormatAppleLossless
char *CAStreamBasicDescription::AsString(char *buf, size_t _bufsize) const
{
int bufsize = (int)_bufsize; // must be signed to protect against overflow
char *theBuffer = buf;
int nc;
char formatID[24];
CAStringForOSType (mFormatID, formatID);
nc = snprintf(buf, bufsize, "%2d ch, %6.0f Hz, %s (0x%08X) ", (int)NumberChannels(), mSampleRate, formatID, (int)mFormatFlags);
buf += nc;
if ((bufsize -= nc) <= 0) goto exit;
if (mFormatID == kAudioFormatLinearPCM) {
bool isInt = !(mFormatFlags & kLinearPCMFormatFlagIsFloat);
int wordSize = SampleWordSize();
const char *endian = (wordSize > 1) ?
((mFormatFlags & kLinearPCMFormatFlagIsBigEndian) ? " big-endian" : " little-endian" ) : "";
const char *sign = isInt ?
((mFormatFlags & kLinearPCMFormatFlagIsSignedInteger) ? " signed" : " unsigned") : "";
const char *floatInt = isInt ? "integer" : "float";
char packed[32];
if (wordSize > 0 && PackednessIsSignificant()) {
if (mFormatFlags & kLinearPCMFormatFlagIsPacked)
snprintf(packed, sizeof(packed), "packed in %d bytes", wordSize);
else
snprintf(packed, sizeof(packed), "unpacked in %d bytes", wordSize);
} else
packed[0] = '\0';
const char *align = (wordSize > 0 && AlignmentIsSignificant()) ?
((mFormatFlags & kLinearPCMFormatFlagIsAlignedHigh) ? " high-aligned" : " low-aligned") : "";
const char *deinter = (mFormatFlags & kAudioFormatFlagIsNonInterleaved) ? ", deinterleaved" : "";
const char *commaSpace = (packed[0]!='\0') || (align[0]!='\0') ? ", " : "";
char bitdepth[20];
int fracbits = (mFormatFlags & kLinearPCMFormatFlagsSampleFractionMask) >> kLinearPCMFormatFlagsSampleFractionShift;
if (fracbits > 0)
snprintf(bitdepth, sizeof(bitdepth), "%d.%d", (int)mBitsPerChannel - fracbits, fracbits);
else
snprintf(bitdepth, sizeof(bitdepth), "%d", (int)mBitsPerChannel);
/* nc =*/ snprintf(buf, bufsize, "%s-bit%s%s %s%s%s%s%s",
bitdepth, endian, sign, floatInt,
commaSpace, packed, align, deinter);
// buf += nc; if ((bufsize -= nc) <= 0) goto exit;
} else if (mFormatID == 'alac') { // kAudioFormatAppleLossless
OSStatus PrintBuses (FILE* file, const char* str, AudioUnit au, AudioUnitScope inScope)
{
OSStatus result;
UInt32 busCount;
UInt32 theSize = sizeof(busCount);
ca_require_noerr (result = AudioUnitGetProperty (au, kAudioUnitProperty_ElementCount,
inScope, 0, &busCount, &theSize), home);
fprintf (file, "\t%s Elements:\n\t\t", str);
for (UInt32 i = 0; i < busCount; ++i) {
Float32 val;
ca_require_noerr (result = AudioUnitGetParameter (au, kMatrixMixerParam_Enable, inScope, i, &val), home);
UInt32 numChans;
ca_require_noerr (result = NumberChannels (au, inScope, i, numChans), home);
char frameCharStart = (val != 0 ? '[' : '{');
char frameCharEnd = (val != 0 ? ']' : '}');
fprintf (file, "%d:%c%d, %c%c ", (int)i, frameCharStart, (int)numChans, (val != 0 ? 'T' : 'F'), frameCharEnd);
}
fprintf (file, "\n");
home:
return result;
}
void CAStreamBasicDescription::PrintFormat2(FILE *f, const char *indent, const char *name) const
{
fprintf(f, "%s%s ", indent, name);
char formatID[5];
*(UInt32 *)formatID = CFSwapInt32HostToBig(mFormatID);
formatID[4] = '\0';
fprintf(f, "%2d ch, %6.0f Hz, '%-4.4s' (0x%08X) ",
(int)NumberChannels(), mSampleRate, formatID,
(int)mFormatFlags);
if (mFormatID == kAudioFormatLinearPCM) {
bool isInt = !(mFormatFlags & kLinearPCMFormatFlagIsFloat);
int wordSize = SampleWordSize();
const char *endian = (wordSize > 1) ?
((mFormatFlags & kLinearPCMFormatFlagIsBigEndian) ? " big-endian" : " little-endian" ) : "";
const char *sign = isInt ?
((mFormatFlags & kLinearPCMFormatFlagIsSignedInteger) ? " signed" : " unsigned") : "";
const char *floatInt = isInt ? "integer" : "float";
char packed[32];
if (wordSize > 0 && PackednessIsSignificant()) {
if (mFormatFlags & kLinearPCMFormatFlagIsPacked)
sprintf(packed, "packed in %d bytes", wordSize);
else
sprintf(packed, "unpacked in %d bytes", wordSize);
} else
packed[0] = '\0';
const char *align = (wordSize > 0 && AlignmentIsSignificant()) ?
((mFormatFlags & kLinearPCMFormatFlagIsAlignedHigh) ? " high-aligned" : " low-aligned") : "";
const char *deinter = (mFormatFlags & kAudioFormatFlagIsNonInterleaved) ? ", deinterleaved" : "";
const char *commaSpace = (packed[0]!='\0') || (align[0]!='\0') ? ", " : "";
fprintf(f, "%d-bit%s%s %s%s%s%s%s",
(int)mBitsPerChannel, endian, sign, floatInt,
commaSpace, packed, align, deinter);
} else if (mFormatID == 'alac') { // kAudioFormatAppleLossless
int sourceBits = 0;
switch (mFormatFlags)
{
case 1: // kAppleLosslessFormatFlag_16BitSourceData
sourceBits = 16;
break;
case 2: // kAppleLosslessFormatFlag_20BitSourceData
sourceBits = 20;
break;
case 3: // kAppleLosslessFormatFlag_24BitSourceData
sourceBits = 24;
break;
case 4: // kAppleLosslessFormatFlag_32BitSourceData
sourceBits = 32;
break;
}
if (sourceBits)
fprintf(f, "from %d-bit source, ", sourceBits);
else
fprintf(f, "from UNKNOWN source bit depth, ");
fprintf(f, "%d frames/packet", (int)mFramesPerPacket);
}
else
fprintf(f, "%d bits/channel, %d bytes/packet, %d frames/packet, %d bytes/frame",
(int)mBitsPerChannel, (int)mBytesPerPacket, (int)mFramesPerPacket, (int)mBytesPerFrame);
}
char *CAStreamBasicDescription::AsString(char *buf, size_t _bufsize, bool brief /*=false*/) const
{
int bufsize = (int)_bufsize; // must be signed to protect against overflow
char *theBuffer = buf;
int nc;
char formatID[24];
CAStringForOSType(mFormatID, formatID, sizeof(formatID));
if (brief) {
CommonPCMFormat com;
bool interleaved;
if (IdentifyCommonPCMFormat(com, &interleaved) && com != kPCMFormatOther) {
const char *desc;
switch (com) {
case kPCMFormatInt16:
desc = "Int16";
break;
case kPCMFormatFixed824:
desc = "Int8.24";
break;
case kPCMFormatFloat32:
desc = "Float32";
break;
case kPCMFormatFloat64:
desc = "Float64";
break;
default:
desc = NULL;
break;
}
if (desc) {
const char *inter ="";
if (mChannelsPerFrame > 1)
inter = !interleaved ? ", non-inter" : ", inter";
snprintf(buf, static_cast<size_t>(bufsize), "%2d ch, %6.0f Hz, %s%s", (int)mChannelsPerFrame, mSampleRate, desc, inter);
return theBuffer;
}
}
if (mChannelsPerFrame == 0 && mSampleRate == 0.0 && mFormatID == 0) {
snprintf(buf, static_cast<size_t>(bufsize), "%2d ch, %6.0f Hz", (int)mChannelsPerFrame, mSampleRate);
return theBuffer;
}
}
nc = snprintf(buf, static_cast<size_t>(bufsize), "%2d ch, %6.0f Hz, %s (0x%08X) ", (int)NumberChannels(), mSampleRate, formatID, (int)mFormatFlags);
buf += nc; if ((bufsize -= nc) <= 0) goto exit;
if (mFormatID == kAudioFormatLinearPCM) {
bool isInt = !(mFormatFlags & kLinearPCMFormatFlagIsFloat);
int wordSize = static_cast<int>(SampleWordSize());
const char *endian = (wordSize > 1) ?
((mFormatFlags & kLinearPCMFormatFlagIsBigEndian) ? " big-endian" : " little-endian" ) : "";
const char *sign = isInt ?
((mFormatFlags & kLinearPCMFormatFlagIsSignedInteger) ? " signed" : " unsigned") : "";
const char *floatInt = isInt ? "integer" : "float";
char packed[32];
if (wordSize > 0 && PackednessIsSignificant()) {
if (mFormatFlags & kLinearPCMFormatFlagIsPacked)
snprintf(packed, sizeof(packed), "packed in %d bytes", wordSize);
else
snprintf(packed, sizeof(packed), "unpacked in %d bytes", wordSize);
} else
packed[0] = '\0';
const char *align = (wordSize > 0 && AlignmentIsSignificant()) ?
((mFormatFlags & kLinearPCMFormatFlagIsAlignedHigh) ? " high-aligned" : " low-aligned") : "";
const char *deinter = (mFormatFlags & kAudioFormatFlagIsNonInterleaved) ? ", deinterleaved" : "";
const char *commaSpace = (packed[0]!='\0') || (align[0]!='\0') ? ", " : "";
char bitdepth[20];
int fracbits = (mFormatFlags & kLinearPCMFormatFlagsSampleFractionMask) >> kLinearPCMFormatFlagsSampleFractionShift;
if (fracbits > 0)
snprintf(bitdepth, sizeof(bitdepth), "%d.%d", (int)mBitsPerChannel - fracbits, fracbits);
else
snprintf(bitdepth, sizeof(bitdepth), "%d", (int)mBitsPerChannel);
/*nc =*/ snprintf(buf, static_cast<size_t>(bufsize), "%s-bit%s%s %s%s%s%s%s",
bitdepth, endian, sign, floatInt,
commaSpace, packed, align, deinter);
// buf += nc; if ((bufsize -= nc) <= 0) goto exit;
} else if (mFormatID == 'alac') { // kAudioFormatAppleLossless
bool CAAudioUnit::CanDo (const CAAUChanHelper &inputs,
const CAAUChanHelper &outputs) const
{
// first check our state
// huh!
if (inputs.mNumEls == 0 && outputs.mNumEls == 0) return false;
UInt32 elCount;
if (GetElementCount (kAudioUnitScope_Input, elCount)) { return false; }
if (elCount != inputs.mNumEls) return false;
if (GetElementCount (kAudioUnitScope_Output, elCount)) { return false; }
if (elCount != outputs.mNumEls) return false;
// (1) special cases (effects and sources (generators and instruments) only)
UInt32 dataSize = 0;
if (GetPropertyInfo (kAudioUnitProperty_SupportedNumChannels,
kAudioUnitScope_Global, 0, &dataSize, NULL) != noErr)
{
if (Comp().Desc().IsEffect() || Comp().Desc().IsOffline()) {
UInt32 numChan = outputs.mNumEls > 0 ? outputs.mChans[0] : inputs.mChans[0];
for (unsigned int in = 0; in < inputs.mNumEls; ++in)
if (numChan != inputs.mChans[in]) return false;
for (unsigned int out = 0; out < outputs.mNumEls; ++out)
if (numChan != outputs.mChans[out]) return false;
return true;
}
// in this case, all the channels have to match the current config
if (Comp().Desc().IsGenerator() || Comp().Desc().IsMusicDevice()) {
for (unsigned int in = 0; in < inputs.mNumEls; ++in) {
UInt32 chan;
if (NumberChannels (kAudioUnitScope_Input, in, chan)) return false;
if (chan != UInt32(inputs.mChans[in])) return false;
}
for (unsigned int out = 0; out < outputs.mNumEls; ++out) {
UInt32 chan;
if (NumberChannels (kAudioUnitScope_Output, out, chan)) return false;
if (chan != UInt32(outputs.mChans[out])) return false;
}
return true;
}
// if we get here we can't determine anything about channel capabilities
return false;
}
StackAUChannelInfo info (dataSize);
if (GetProperty (kAudioUnitProperty_SupportedNumChannels,
kAudioUnitScope_Global, 0,
info.mChanInfo, &dataSize) != noErr)
{
return false;
}
int numInfo = dataSize / sizeof(AUChannelInfo);
// (2) Test for dynamic capability (or no elements on that scope)
SInt32 dynInChans = 0;
if (ValidateDynamicScope (kAudioUnitScope_Input, dynInChans, info.mChanInfo, numInfo)) {
if (CheckDynCount (dynInChans, inputs) == false) return false;
}
SInt32 dynOutChans = 0;
if (ValidateDynamicScope (kAudioUnitScope_Output, dynOutChans, info.mChanInfo, numInfo)) {
if (CheckDynCount (dynOutChans, outputs) == false) return false;
}
if (dynOutChans && dynInChans) { return true; }
// (3) Just need to test one side
if (dynInChans || (inputs.mNumEls == 0)) {
return CheckOneSide (outputs, true, info.mChanInfo, numInfo);
}
if (dynOutChans || (outputs.mNumEls == 0)) {
return CheckOneSide (inputs, false, info.mChanInfo, numInfo);
}
// (4) - not a dynamic AU, has ins and outs, and has channel constraints so we test every possible pairing
for (unsigned int in = 0; in < inputs.mNumEls; ++in)
{
bool testInAlready = false;
for (unsigned int i = 0; i < in; ++i) {
if (inputs.mChans[i] == inputs.mChans[in]) {
testInAlready = true;
break;
}
}
if (!testInAlready) {
for (unsigned int out = 0; out < outputs.mNumEls; ++out) {
// try to save a little bit and not test the same pairing multiple times...
bool testOutAlready = false;
for (unsigned int i = 0; i < out; ++i) {
if (outputs.mChans[i] == outputs.mChans[out]) {
testOutAlready = true;
break;
}
}
if (!testOutAlready) {
if (!ValidateChannelPair (inputs.mChans[in], outputs.mChans[out],info.mChanInfo, numInfo)) {
return false;
}
}
}
}
}
return true;
}
int CAAudioUnit::GetChannelInfo (AUChannelInfo** chaninfo, UInt32& cnt)
{
// this is the default assumption of an audio effect unit
Boolean* isWritable = 0;
UInt32 dataSize = 0;
// lets see if the unit has any channel restrictions
OSStatus result = AudioUnitGetPropertyInfo (AU(),
kAudioUnitProperty_SupportedNumChannels,
kAudioUnitScope_Global, 0,
&dataSize, isWritable); //don't care if this is writable
// if this property is NOT implemented an FX unit
// is expected to deal with same channel valance in and out
if (result)
{
if (Comp().Desc().IsEffect())
{
return 1;
}
else if (Comp().Desc().IsGenerator() || Comp().Desc().IsMusicDevice()) {
// directly query Bus Formats
// Note that that these may refer to different subBusses
// (eg. Kick, Snare,.. on a Drummachine)
// eventually the Bus-Name for each configuration should be exposed
// for the User to select..
UInt32 elCountIn, elCountOut;
if (GetElementCount (kAudioUnitScope_Input, elCountIn)) return -1;
if (GetElementCount (kAudioUnitScope_Output, elCountOut)) return -1;
cnt = std::max(elCountIn, elCountOut);
*chaninfo = (AUChannelInfo*) malloc (sizeof (AUChannelInfo) * cnt);
for (unsigned int i = 0; i < elCountIn; ++i) {
UInt32 numChans;
if (NumberChannels (kAudioUnitScope_Input, i, numChans)) return -1;
(*chaninfo)[i].inChannels = numChans;
}
for (unsigned int i = elCountIn; i < cnt; ++i) {
(*chaninfo)[i].inChannels = 0;
}
for (unsigned int i = 0; i < elCountOut; ++i) {
UInt32 numChans;
if (NumberChannels (kAudioUnitScope_Output, i, numChans)) return -1;
(*chaninfo)[i].outChannels = numChans;
}
for (unsigned int i = elCountOut; i < cnt; ++i) {
(*chaninfo)[i].outChannels = 0;
}
return 0;
}
else
{
// the au should either really tell us about this
// or we will assume the worst
return -1;
}
}
*chaninfo = (AUChannelInfo*) malloc (dataSize);
cnt = dataSize / sizeof (AUChannelInfo);
result = GetProperty (kAudioUnitProperty_SupportedNumChannels,
kAudioUnitScope_Global, 0,
*chaninfo, &dataSize);
if (result) { return -1; }
return 0;
}
