bool WaveTrack::Get(samplePtr buffer, sampleFormat format,
longSampleCount start, sampleCount len)
{
longSampleCount startTime = (longSampleCount)floor(mOffset*mRate + 0.5);
longSampleCount endTime = startTime + mSequence->GetNumSamples();
if (start+len < startTime || start>=endTime) {
ClearSamples(buffer, format, 0, len);
return true;
}
sampleCount s0 = (sampleCount)(start - startTime);
sampleCount soffset = 0;
sampleCount getlen = len;
if (s0 < 0) {
soffset = -s0;
getlen -= soffset;
s0 = 0;
}
if (s0+getlen > mSequence->GetNumSamples())
getlen = mSequence->GetNumSamples() - s0;
if (!mSequence->Get(buffer + soffset*SAMPLE_SIZE(format), format,
s0, getlen)) {
ClearSamples(buffer, format, 0, len);
return false;
}
ClearSamples(buffer, format, 0, soffset);
ClearSamples(buffer, format, soffset+getlen, len-(soffset+getlen));
return true;
}
void Mixer::GetSamples(WaveTrack *src, int s0, int slen)
{
// Retrieves samples from a track, even outside of the range which
// contains samples. (Fills in extra space with zeros.)
// Puts samples in mTemp
if (slen > mTempBufferSize) {
mTempBufferSize = slen;
DeleteSamples(mTemp);
mTemp = NewSamples(mTempBufferSize, mFormat);
}
int soffset = 0;
int getlen = slen;
if (s0 < 0) {
soffset = -s0;
getlen -= soffset;
s0 = 0;
}
if (s0+getlen > src->GetNumSamples()) {
getlen = src->GetNumSamples() - s0;
}
src->Get(mTemp + soffset*SAMPLE_SIZE(mFormat), mFormat,
(sampleCount)s0, (sampleCount)getlen);
ClearSamples(mTemp, mFormat, 0, soffset);
ClearSamples(mTemp, mFormat, soffset+getlen, slen-(soffset+getlen));
}
size_t SilentBlockFile::ReadData(samplePtr data, sampleFormat format,
size_t WXUNUSED(start), size_t len, bool) const
{
ClearSamples(data, format, 0, len);
return len;
}
int SilentBlockFile::ReadData(samplePtr data, sampleFormat format,
sampleCount start, sampleCount len)
{
ClearSamples(data, format, 0, len);
return len;
}
// Pass NULL to set silence
bool Sequence::Set(samplePtr buffer, sampleFormat format,
sampleCount start, sampleCount len)
{
if (start < 0 || start > mNumSamples ||
start+len > mNumSamples)
return false;
samplePtr temp = NULL;
if (format != mSampleFormat) {
temp = NewSamples(mMaxSamples, mSampleFormat);
wxASSERT(temp);
}
samplePtr silence = NULL;
if (!buffer) {
silence = NewSamples(mMaxSamples, format);
wxASSERT(silence);
ClearSamples(silence, format, 0, mMaxSamples);
}
int b = FindBlock(start);
while (len) {
int blen = mBlock->Item(b)->start + mBlock->Item(b)->len - start;
if (blen > len)
blen = len;
if (buffer) {
if (format == mSampleFormat)
CopyWrite(buffer, mBlock->Item(b), start - mBlock->Item(b)->start,
blen);
else {
CopySamples(buffer, format, temp, mSampleFormat, blen);
CopyWrite(temp, mBlock->Item(b), start - mBlock->Item(b)->start,
blen);
}
buffer += (blen * SAMPLE_SIZE(format));
} else
CopyWrite(silence, mBlock->Item(b), start - mBlock->Item(b)->start,
blen);
len -= blen;
start += blen;
b++;
}
if (!buffer)
DeleteSamples(silence);
if (format != mSampleFormat)
DeleteSamples(temp);
return ConsistencyCheck("Set");
}
bool WaveTrack::Get(samplePtr buffer, sampleFormat format,
longSampleCount start, sampleCount len)
{
// Simple optimization: When this buffer is completely contained within one clip,
// don't clear anything (because we never won't have to). Otherwise, just clear
// everything to be on the safe side.
WaveClipList::Node* it;
bool doClear = true;
for (it=GetClipIterator(); it; it=it->GetNext())
{
WaveClip *clip = it->GetData();
if (start >= clip->GetStartSample() && start+len <= clip->GetEndSample())
{
doClear = false;
break;
}
}
if (doClear)
ClearSamples(buffer, format, 0, len);
for (it=GetClipIterator(); it; it=it->GetNext())
{
WaveClip *clip = it->GetData();
longSampleCount clipStart = clip->GetStartSample();
longSampleCount clipEnd = clip->GetEndSample();
if (clipEnd > start && clipStart < start+len)
{
// Clip sample region and Get/Put sample region overlap
sampleCount samplesToCopy = start+len - clipStart;
if (samplesToCopy > clip->GetNumSamples())
samplesToCopy = clip->GetNumSamples();
longSampleCount inclipDelta = 0;
longSampleCount startDelta = clipStart - start;
if (startDelta < 0)
{
inclipDelta = -startDelta; // make positive value
samplesToCopy -= inclipDelta;
startDelta = 0;
}
if (!clip->GetSamples((samplePtr)(((char*)buffer)+startDelta*SAMPLE_SIZE(format)),
format, inclipDelta, samplesToCopy))
{
wxASSERT(false); // should always work
return false;
}
}
}
return true;
}
/// Returns the 64K summary data block
/// Fill with zeroes and return false if data are unavailable for any reason.
bool ODDecodeBlockFile::Read64K(float *buffer, size_t start, size_t len)
{
if(IsSummaryAvailable())
{
return SimpleBlockFile::Read64K(buffer,start,len);
}
else
{
ClearSamples((samplePtr)buffer, floatSample, 0, len);
return false;
}
}
/// Returns the 64K summary data block.
/// Fill with zeroes and return false if data are unavailable for any reason.
bool ODPCMAliasBlockFile::Read64K(float *buffer, size_t start, size_t len)
{
if(IsSummaryAvailable())
{
return PCMAliasBlockFile::Read64K(buffer,start,len);
}
else
{
//return nothing - it hasn't been calculated yet
ClearSamples((samplePtr)buffer, floatSample, 0, len);
return false;
}
}
/// Returns the 256 byte summary data block.
/// Fill with zeroes and return false if data are unavailable for any reason.
bool ODPCMAliasBlockFile::Read256(float *buffer, size_t start, size_t len)
{
if(IsSummaryAvailable())
{
return PCMAliasBlockFile::Read256(buffer,start,len);
}
else
{
//return nothing.
ClearSamples((samplePtr)buffer, floatSample, 0, len);
return false;
}
}
bool Sequence::InsertSilence(sampleCount s0, sampleCount len)
{
// Create a new track containing as much silence as we
// need to insert, and then call Paste to do the insertion
Sequence *sTrack = new Sequence(mDirManager, mSampleFormat);
sampleCount idealSamples = GetIdealBlockSize();
// Allocate a zeroed buffer
samplePtr buffer = NewSamples(idealSamples, mSampleFormat);
ClearSamples(buffer, mSampleFormat, 0, idealSamples);
sampleCount pos = 0;
BlockFile *firstBlockFile = NULL;
while (len) {
sampleCount l = (len > idealSamples ? idealSamples : len);
SeqBlock *w = new SeqBlock();
w->start = pos;
w->len = l;
w->min = float(0.0);
w->max = float(0.0);
w->rms = float(0.0);
if (pos == 0 || len == l) {
w->f = mDirManager->NewBlockFile(mSummary->totalSummaryBytes);
firstBlockFile = w->f;
FirstWrite(buffer, w, l);
} else {
w->f = mDirManager->CopyBlockFile(firstBlockFile);
if (!w->f) {
// TODO set error message
return false;
}
}
sTrack->mBlock->Add(w);
pos += l;
len -= l;
}
sTrack->mNumSamples = pos;
Paste(s0, sTrack);
delete sTrack;
DeleteSamples(buffer);
return ConsistencyCheck("InsertSilence");
}
/// Reads the specified data from the aliased file, using libsndfile,
/// and converts it to the given sample format.
///
/// @param data The buffer to read the sample data into.
/// @param format The format to convert the data into
/// @param start The offset within the block to begin reading
/// @param len The number of samples to read
int ODDecodeBlockFile::ReadData(samplePtr data, sampleFormat format,
sampleCount start, sampleCount len)
{
int ret;
LockRead();
if(IsSummaryAvailable())
ret= SimpleBlockFile::ReadData(data,format,start,len);
else
{
//we should do an ODRequest to start processing the data here, and wait till it finishes. and just do a SimpleBlockFIle
//ReadData.
ClearSamples(data, format, 0, len);
ret= len;
}
UnlockRead();
return ret;
}
/// Reads the specified data from the aliased file, using libsndfile,
/// and converts it to the given sample format.
///
/// @param data The buffer to read the sample data into.
/// @param format The format to convert the data into
/// @param start The offset within the block to begin reading
/// @param len The number of samples to read
size_t ODDecodeBlockFile::ReadData(samplePtr data, sampleFormat format,
size_t start, size_t len, bool mayThrow) const
{
auto locker = LockForRead();
if(IsSummaryAvailable())
return SimpleBlockFile::ReadData(data, format, start, len, mayThrow);
else
{
if (mayThrow)
throw NotYetAvailableException{ mAudioFileName };
//we should do an ODRequest to start processing the data here, and wait till it finishes. and just do a SimpleBlockFile
//ReadData.
ClearSamples(data, format, 0, len);
return 0;
}
}
size_t RingBuffer::Clear(sampleFormat format, size_t samplesToClear)
{
samplesToClear = std::min( samplesToClear, AvailForPut() );
size_t cleared = 0;
auto pos = mEnd;
while(samplesToClear) {
auto block = std::min( samplesToClear, mBufferSize - pos );
ClearSamples(mBuffer.ptr(), format, pos, block);
pos = (pos + block) % mBufferSize;
samplesToClear -= block;
cleared += block;
}
mEnd = pos;
return cleared;
}
bool Sequence::Read(samplePtr buffer, sampleFormat format,
SeqBlock * b, sampleCount start, sampleCount len) const
{
wxASSERT(b);
wxASSERT(start >= 0);
wxASSERT(start + len <= b->f->GetLength());
BlockFile *f = b->f;
int result = f->ReadData(buffer, format, start, len);
if (result != len)
{
wxLogError(wxT("Expected to read %d samples, got %d samples.\n"), len, result);
if (result < 0)
result = 0;
ClearSamples(buffer, format, result, len-result);
}
return true;
}
// Pass NULL to set silence
bool Sequence::Set(samplePtr buffer, sampleFormat format,
sampleCount start, sampleCount len)
{
if (start < 0 || start > mNumSamples ||
start+len > mNumSamples)
return false;
samplePtr temp = NULL;
if (format != mSampleFormat) {
temp = NewSamples(mMaxSamples, mSampleFormat);
wxASSERT(temp);
}
samplePtr silence = NULL;
if (!buffer) {
silence = NewSamples(mMaxSamples, format);
wxASSERT(silence);
ClearSamples(silence, format, 0, mMaxSamples);
}
int b = FindBlock(start);
while (len) {
int blen = mBlock->Item(b)->start + mBlock->Item(b)->f->GetLength() - start;
if (blen > len)
blen = len;
if (buffer) {
if (format == mSampleFormat)
CopyWrite(buffer, mBlock->Item(b), start - mBlock->Item(b)->start,
blen);
else {
CopySamples(buffer, format, temp, mSampleFormat, blen);
CopyWrite(temp, mBlock->Item(b), start - mBlock->Item(b)->start,
blen);
}
buffer += (blen * SAMPLE_SIZE(format));
}
else {
// If it's a full block of silence
if (start == mBlock->Item(b)->start &&
blen == mBlock->Item(b)->f->GetLength()) {
mDirManager->Deref(mBlock->Item(b)->f);
mBlock->Item(b)->f = new SilentBlockFile(blen);
}
else {
// Otherwise write silence just to the portion of the block
CopyWrite(silence, mBlock->Item(b),
start - mBlock->Item(b)->start, blen);
}
}
len -= blen;
start += blen;
b++;
}
if (!buffer)
DeleteSamples(silence);
if (format != mSampleFormat)
DeleteSamples(temp);
return ConsistencyCheck(wxT("Set"));
}
int audacityAudioCallback(
void *inputBuffer, void *outputBuffer,
unsigned long framesPerBuffer,
PaTimestamp outTime, void *userData )
{
int numOutChannels = gAudioIO->mNumOutChannels;
int numInChannels = gAudioIO->mNumInChannels;
int minIndex = 0, minID = 0;
unsigned int i;
//
// Copy from our pool of output buffers to PortAudio's output buffer
//
if (outputBuffer && numOutChannels > 0) {
for(i=0; i<gAudioIO->mNumOutBuffers; i++) {
if (gAudioIO->mOutBuffer[i].ID>0 &&
(minID==0 || gAudioIO->mOutBuffer[i].ID < minID)) {
minID = gAudioIO->mOutBuffer[i].ID;
minIndex = i;
}
}
if (minID > 0) {
AudioIOBuffer *b = &gAudioIO->mOutBuffer[minIndex];
sampleCount len = b->len;
memcpy(outputBuffer, b->data,
len * numOutChannels * SAMPLE_SIZE(gAudioIO->GetFormat()));
// Fill rest of buffer with silence
if (len < (sampleCount) framesPerBuffer)
ClearSamples((samplePtr)outputBuffer, gAudioIO->GetFormat(),
len*numOutChannels,
(framesPerBuffer-len)*numOutChannels);
b->ID = 0;
}
else {
// we had a buffer underrun!
// play silence
ClearSamples((samplePtr)outputBuffer, gAudioIO->GetFormat(),
0, framesPerBuffer * numOutChannels);
// increase number of output buffers to prevent another underrun!
if (gAudioIO->mNumOutBuffers < gAudioIO->mMaxBuffers)
gAudioIO->mNumOutBuffers++;
}
}
//
// Copy from PortAudio's input buffer to one of our input buffers.
//
if (inputBuffer && numInChannels > 0) {
bool found = false;
for(i=0; i<gAudioIO->mNumInBuffers; i++) {
if (gAudioIO->mInBuffer[i].ID == 0) {
int len = framesPerBuffer;
int sampleSize = SAMPLE_SIZE(gAudioIO->GetFormat());
AudioIOBuffer *b = &gAudioIO->mInBuffer[i];
memcpy(b->data, inputBuffer,
len * numInChannels * sampleSize);
b->len = len;
b->ID = gAudioIO->mInID;
gAudioIO->mInID++;
found = true;
int checksum = 0;
for(int k=0; k<len*numInChannels*sampleSize; k++)
checksum += ((char *)inputBuffer)[k];
if (checksum == gAudioIO->mLastChecksum) {
gAudioIO->mRepeats++;
gAudioIO->mRepeatPoint = gAudioIO->mT;
}
gAudioIO->mLastChecksum = checksum;
break;
}
}
if (!found) {
// we had a buffer underrun!
gAudioIO->mInUnderruns++;
}
}
return 0;
}