/// Reads the specified data from the aliased file, using libsndfile,
/// and converts it to the given sample format.
/// Copied from PCMAliasBlockFIle but wxLog calls taken out for thread safety
///
/// @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 ODPCMAliasBlockFile::ReadData(samplePtr data, sampleFormat format,
size_t start, size_t len) const
{
LockRead();
SF_INFO info;
if(!mAliasedFileName.IsOk()){ // intentionally silenced
memset(data,0,SAMPLE_SIZE(format)*len);
UnlockRead();
return len;
}
memset(&info, 0, sizeof(info));
wxString aliasPath = mAliasedFileName.GetFullPath();
wxFile f; // will be closed when it goes out of scope
SFFile sf;
if (f.Exists(aliasPath) && f.Open(aliasPath)) {
// Even though there is an sf_open() that takes a filename, use the one that
// takes a file descriptor since wxWidgets can open a file with a Unicode name and
// libsndfile can't (under Windows).
sf.reset(SFCall<SNDFILE*>(sf_open_fd, f.fd(), SFM_READ, &info, FALSE));
}
// FIXME: TRAP_ERR failure of wxFile open incompletely handled in ODPCMAliasBlockFile::ReadData.
if (!sf) {
memset(data,0,SAMPLE_SIZE(format)*len);
mSilentAliasLog = TRUE;
// Set a marker to display an error message
if (!wxGetApp().ShouldShowMissingAliasedFileWarning())
wxGetApp().MarkAliasedFilesMissingWarning(this);
UnlockRead();
return len;
}
mSilentAliasLog=FALSE;
// Third party library has its own type alias, check it
static_assert(sizeof(sampleCount::type) <= sizeof(sf_count_t),
"Type sf_count_t is too narrow to hold a sampleCount");
SFCall<sf_count_t>(sf_seek, sf.get(),
( mAliasStart + start ).as_long_long(), SEEK_SET);
wxASSERT(info.channels >= 0);
SampleBuffer buffer(len * info.channels, floatSample);
size_t framesRead = 0;
if (format == int16Sample &&
!sf_subtype_more_than_16_bits(info.format)) {
// Special case: if the file is in 16-bit (or less) format,
// and the calling method wants 16-bit data, go ahead and
// read 16-bit data directly. This is a pretty common
// case, as most audio files are 16-bit.
framesRead = SFCall<sf_count_t>(sf_readf_short, sf.get(), (short *)buffer.ptr(), len);
for (int i = 0; i < framesRead; i++)
((short *)data)[i] =
((short *)buffer.ptr())[(info.channels * i) + mAliasChannel];
}
else {
// Otherwise, let libsndfile handle the conversion and
// scaling, and pass us normalized data as floats. We can
// then convert to whatever format we want.
framesRead = SFCall<sf_count_t>(sf_readf_float, sf.get(), (float *)buffer.ptr(), len);
float *bufferPtr = &((float *)buffer.ptr())[mAliasChannel];
CopySamples((samplePtr)bufferPtr, floatSample,
(samplePtr)data, format,
framesRead, true, info.channels);
}
UnlockRead();
return framesRead;
}
/// Read the data portion of the block file using libsndfile. Convert it
/// to the given format if it is not already.
///
/// @param data The buffer where the data will be stored
/// @param format The format the data will be stored in
/// @param start The offset in this block file
/// @param len The number of samples to read
int LegacyBlockFile::ReadData(samplePtr data, sampleFormat format,
sampleCount start, sampleCount len) const
{
SF_INFO info;
memset(&info, 0, sizeof(info));
switch(mFormat) {
case int16Sample:
info.format =
SF_FORMAT_RAW | SF_FORMAT_PCM_16 | SF_ENDIAN_CPU;
break;
default:
case floatSample:
info.format =
SF_FORMAT_RAW | SF_FORMAT_FLOAT | SF_ENDIAN_CPU;
break;
case int24Sample:
info.format = SF_FORMAT_RAW | SF_FORMAT_PCM_32 | SF_ENDIAN_CPU;
break;
}
info.samplerate = 44100; // Doesn't matter
info.channels = 1;
info.frames = mLen + (mSummaryInfo.totalSummaryBytes /
SAMPLE_SIZE(mFormat));
wxFile f; // will be closed when it goes out of scope
SFFile sf;
if (f.Open(mFileName.GetFullPath())) {
// Even though there is an sf_open() that takes a filename, use the one that
// takes a file descriptor since wxWidgets can open a file with a Unicode name and
// libsndfile can't (under Windows).
sf.reset(SFCall<SNDFILE*>(sf_open_fd, f.fd(), SFM_READ, &info, FALSE));
}
{
Maybe<wxLogNull> silence{};
if (mSilentLog)
silence.create();
if (!sf) {
memset(data, 0, SAMPLE_SIZE(format)*len);
mSilentLog = TRUE;
return len;
}
}
mSilentLog=FALSE;
sf_count_t seekstart = start +
(mSummaryInfo.totalSummaryBytes / SAMPLE_SIZE(mFormat));
SFCall<sf_count_t>(sf_seek, sf.get(), seekstart , SEEK_SET);
SampleBuffer buffer(len, floatSample);
int framesRead = 0;
// If both the src and dest formats are integer formats,
// read integers from the file (otherwise we would be
// converting to float and back, which is unneccesary)
if (format == int16Sample &&
sf_subtype_is_integer(info.format)) {
framesRead = SFCall<sf_count_t>(sf_readf_short, sf.get(), (short *)data, len);
}
else if (format == int24Sample &&
sf_subtype_is_integer(info.format)) {
framesRead = SFCall<sf_count_t>(sf_readf_int, sf.get(), (int *)data, len);
// libsndfile gave us the 3 byte sample in the 3 most
// significant bytes -- we want it in the 3 least
// significant bytes.
int *intPtr = (int *)data;
for( int i = 0; i < framesRead; i++ )
intPtr[i] = intPtr[i] >> 8;
} else {
/// Read the data portion of the block file using libsndfile. Convert it
/// to the given format if it is not already.
///
/// @param data The buffer where the data will be stored
/// @param format The format the data will be stored in
/// @param start The offset in this block file
/// @param len The number of samples to read
int SimpleBlockFile::ReadData(samplePtr data, sampleFormat format,
sampleCount start, sampleCount len) const
{
if (mCache.active)
{
//wxLogDebug("SimpleBlockFile::ReadData(): Data are already in cache.");
if (len > mLen - start)
len = mLen - start;
CopySamples(
(samplePtr)(((char*)mCache.sampleData) +
start * SAMPLE_SIZE(mCache.format)),
mCache.format, data, format, len);
return len;
} else
{
//wxLogDebug("SimpleBlockFile::ReadData(): Reading data from disk.");
SF_INFO info;
wxFile f; // will be closed when it goes out of scope
SFFile sf;
{
Maybe<wxLogNull> silence{};
if (mSilentLog)
silence.create();
memset(&info, 0, sizeof(info));
if (f.Open(mFileName.GetFullPath())) {
// Even though there is an sf_open() that takes a filename, use the one that
// takes a file descriptor since wxWidgets can open a file with a Unicode name and
// libsndfile can't (under Windows).
sf.reset(SFCall<SNDFILE*>(sf_open_fd, f.fd(), SFM_READ, &info, FALSE));
}
// FIXME: TRAP_ERR failure of wxFile open incompletely handled in SimpleBlockFile::ReadData.
// FIXME: Too much cut and paste code between the different block file types.
if (!sf) {
memset(data, 0, SAMPLE_SIZE(format)*len);
mSilentLog = TRUE;
return len;
}
}
mSilentLog=FALSE;
SFCall<sf_count_t>(sf_seek, sf.get(), start, SEEK_SET);
SampleBuffer buffer(len, floatSample);
int framesRead = 0;
// If both the src and dest formats are integer formats,
// read integers from the file (otherwise we would be
// converting to float and back, which is unneccesary)
if (format == int16Sample &&
sf_subtype_is_integer(info.format)) {
framesRead = SFCall<sf_count_t>(sf_readf_short, sf.get(), (short *)data, len);
}
else
if (format == int24Sample &&
sf_subtype_is_integer(info.format))
{
framesRead = SFCall<sf_count_t>(sf_readf_int, sf.get(), (int *)data, len);
// libsndfile gave us the 3 byte sample in the 3 most
// significant bytes -- we want it in the 3 least
// significant bytes.
int *intPtr = (int *)data;
for( int i = 0; i < framesRead; i++ )
intPtr[i] = intPtr[i] >> 8;
}
else {