void AUBufferList::Allocate(const CAStreamBasicDescription &format, UInt32 nFrames)
{
UInt32 nStreams;
UInt32 channelsPerStream;
if (format.IsInterleaved()) {
nStreams = 1;
channelsPerStream = format.mChannelsPerFrame;
} else {
nStreams = format.mChannelsPerFrame;
channelsPerStream = 1;
}
// careful -- the I/O thread could be running!
if (nStreams > mAllocatedStreams) {
mPtrs = (AudioBufferList *)CA_realloc(mPtrs, offsetof(AudioBufferList, mBuffers) + nStreams * sizeof(AudioBuffer));
mAllocatedStreams = nStreams;
}
UInt32 bytesPerStream = (nFrames * format.mBytesPerFrame + 0xF) & ~0xF;
UInt32 nBytes = nStreams * bytesPerStream;
if (nBytes > mAllocatedBytes) {
if (mExternalMemory) {
mExternalMemory = false;
mMemory = NULL;
}
mMemory = (Byte *)CA_realloc(mMemory, nBytes);
mAllocatedBytes = nBytes;
}
mAllocatedFrames = nFrames;
mPtrState = kPtrsInvalid;
}
void AUBufferList::Allocate(const CAStreamBasicDescription &format, UInt32 nFrames)
{
UInt32 nStreams;
if (format.IsInterleaved()) {
nStreams = 1;
} else {
nStreams = format.mChannelsPerFrame;
}
// careful -- the I/O thread could be running!
if (nStreams > mAllocatedStreams) {
size_t theHeaderSize = sizeof(AudioBufferList) - sizeof(AudioBuffer);
mPtrs = (AudioBufferList *)CA_realloc(mPtrs,
SafeMultiplyAddUInt32(nStreams, sizeof(AudioBuffer), theHeaderSize));
mAllocatedStreams = nStreams;
}
UInt32 bytesPerStream = SafeMultiplyAddUInt32(nFrames, format.mBytesPerFrame, 0xF) & ~0xF;
UInt32 nBytes = SafeMultiplyAddUInt32(nStreams, bytesPerStream, 0);
if (nBytes > mAllocatedBytes) {
if (mExternalMemory) {
mExternalMemory = false;
mMemory = NULL;
}
mMemory = (Byte *)CA_realloc(mMemory, nBytes);
mAllocatedBytes = nBytes;
}
mAllocatedFrames = nFrames;
mPtrState = kPtrsInvalid;
}
