void AUD_FileWriter::writeReader(AUD_Reference<AUD_IReader> reader, AUD_Reference<AUD_IWriter> writer, unsigned int length, unsigned int buffersize)
{
AUD_Buffer buffer(buffersize * AUD_SAMPLE_SIZE(writer->getSpecs()));
sample_t* buf = buffer.getBuffer();
int len;
bool eos = false;
int channels = writer->getSpecs().channels;
for(unsigned int pos = 0; ((pos < length) || (length <= 0)) && !eos; pos += len)
{
len = buffersize;
if((len > length - pos) && (length > 0))
len = length - pos;
reader->read(len, eos, buf);
for(int i = 0; i < len * channels; i++)
{
// clamping!
if(buf[i] > 1)
buf[i] = 1;
else if(buf[i] < -1)
buf[i] = -1;
}
writer->write(len, buf);
}
}
void AUD_FileWriter::writeReader(AUD_Reference<AUD_IReader> reader, std::vector<AUD_Reference<AUD_IWriter> >& writers, unsigned int length, unsigned int buffersize)
{
AUD_Buffer buffer(buffersize * AUD_SAMPLE_SIZE(reader->getSpecs()));
AUD_Buffer buffer2(buffersize * sizeof(sample_t));
sample_t* buf = buffer.getBuffer();
sample_t* buf2 = buffer2.getBuffer();
int len;
bool eos = false;
int channels = reader->getSpecs().channels;
for(unsigned int pos = 0; ((pos < length) || (length <= 0)) && !eos; pos += len)
{
len = buffersize;
if((len > length - pos) && (length > 0))
len = length - pos;
reader->read(len, eos, buf);
for(int channel = 0; channel < channels; channel++)
{
for(int i = 0; i < len; i++)
{
// clamping!
if(buf[i * channels + channel] > 1)
buf2[i] = 1;
else if(buf[i * channels + channel] < -1)
buf2[i] = -1;
else
buf2[i] = buf[i * channels + channel];
}
writers[channel]->write(len, buf2);
}
}
}
AUD_DoubleReader::AUD_DoubleReader(AUD_Reference<AUD_IReader> reader1,
AUD_Reference<AUD_IReader> reader2) :
m_reader1(reader1), m_reader2(reader2), m_finished1(false)
{
AUD_Specs s1, s2;
s1 = reader1->getSpecs();
s2 = reader2->getSpecs();
}
AUD_Reference<AUD_IReader> AUD_EnvelopeFactory::createReader()
{
AUD_Reference<AUD_IReader> reader = getReader();
EnvelopeParameters* param = new EnvelopeParameters();
param->arthreshold = m_arthreshold;
param->attack = pow(m_arthreshold, 1.0f/(static_cast<float>(reader->getSpecs().rate) * m_attack));
param->release = pow(m_arthreshold, 1.0f/(static_cast<float>(reader->getSpecs().rate) * m_release));
param->threshold = m_threshold;
return new AUD_CallbackIIRFilterReader(reader, 1, 2,
(doFilterIIR) envelopeFilter,
(endFilterIIR) endEnvelopeFilter,
param);
}
AUD_SoundInfo AUD_getInfo(AUD_Sound* sound)
{
assert(sound);
AUD_SoundInfo info;
info.specs.channels = AUD_CHANNELS_INVALID;
info.specs.rate = AUD_RATE_INVALID;
info.length = 0.0f;
try
{
AUD_Reference<AUD_IReader> reader = (*sound)->createReader();
if(!reader.isNull())
{
info.specs = reader->getSpecs();
info.length = reader->getLength() / (float) info.specs.rate;
}
}
catch(AUD_Exception&)
{
}
return info;
}
float* AUD_readSoundBuffer(const char* filename, float low, float high,
float attack, float release, float threshold,
int accumulate, int additive, int square,
float sthreshold, double samplerate, int* length)
{
AUD_Buffer buffer;
AUD_DeviceSpecs specs;
specs.channels = AUD_CHANNELS_MONO;
specs.rate = (AUD_SampleRate)samplerate;
AUD_Reference<AUD_IFactory> sound;
AUD_Reference<AUD_IFactory> file = new AUD_FileFactory(filename);
AUD_Reference<AUD_IReader> reader = file->createReader();
AUD_SampleRate rate = reader->getSpecs().rate;
sound = new AUD_ChannelMapperFactory(file, specs);
if(high < rate)
sound = new AUD_LowpassFactory(sound, high);
if(low > 0)
sound = new AUD_HighpassFactory(sound, low);
sound = new AUD_EnvelopeFactory(sound, attack, release, threshold, 0.1f);
sound = new AUD_LinearResampleFactory(sound, specs);
if(square)
sound = new AUD_SquareFactory(sound, sthreshold);
if(accumulate)
sound = new AUD_AccumulatorFactory(sound, additive);
else if(additive)
sound = new AUD_SumFactory(sound);
reader = sound->createReader();
if(reader.isNull())
return NULL;
int len;
int position = 0;
bool eos;
do
{
len = samplerate;
buffer.resize((position + len) * sizeof(float), true);
reader->read(len, eos, buffer.getBuffer() + position);
position += len;
} while(!eos);
float* result = (float*)malloc(position * sizeof(float));
memcpy(result, buffer.getBuffer(), position * sizeof(float));
*length = position;
return result;
}
AUD_BaseIIRFilterReader::AUD_BaseIIRFilterReader(AUD_Reference<AUD_IReader> reader, int in,
int out) :
AUD_EffectReader(reader),
m_specs(reader->getSpecs()),
m_xlen(in), m_ylen(out),
m_xpos(0), m_ypos(0), m_channel(0)
{
m_x = new sample_t[m_xlen * m_specs.channels];
m_y = new sample_t[m_ylen * m_specs.channels];
memset(m_x, 0, sizeof(sample_t) * m_xlen * m_specs.channels);
memset(m_y, 0, sizeof(sample_t) * m_ylen * m_specs.channels);
}
int AUD_readSound(AUD_Sound* sound, sample_t* buffer, int length, int samples_per_second)
{
AUD_DeviceSpecs specs;
sample_t* buf;
AUD_Buffer aBuffer;
specs.rate = AUD_RATE_INVALID;
specs.channels = AUD_CHANNELS_MONO;
specs.format = AUD_FORMAT_INVALID;
AUD_Reference<AUD_IReader> reader = AUD_ChannelMapperFactory(*sound, specs).createReader();
specs.specs = reader->getSpecs();
int len;
float samplejump = specs.rate / samples_per_second;
float min, max, power;
bool eos;
for(int i = 0; i < length; i++)
{
len = floor(samplejump * (i+1)) - floor(samplejump * i);
aBuffer.assureSize(len * AUD_SAMPLE_SIZE(specs));
buf = aBuffer.getBuffer();
reader->read(len, eos, buf);
max = min = *buf;
power = *buf * *buf;
for(int j = 1; j < len; j++)
{
if(buf[j] < min)
min = buf[j];
if(buf[j] > max)
max = buf[j];
power += buf[j] * buf[j];
}
buffer[i * 3] = min;
buffer[i * 3 + 1] = max;
buffer[i * 3 + 2] = sqrt(power) / len;
if(eos)
{
length = i;
break;
}
}
return length;
}
AUD_Reference<AUD_IHandle> AUD_OpenALDevice::play(AUD_Reference<AUD_IReader> reader, bool keep)
{
AUD_Specs specs = reader->getSpecs();
// check format
if(specs.channels == AUD_CHANNELS_INVALID)
return AUD_Reference<AUD_IHandle>();
if(m_specs.format != AUD_FORMAT_FLOAT32)
reader = new AUD_ConverterReader(reader, m_specs);
ALenum format;
if(!getFormat(format, specs))
return AUD_Reference<AUD_IHandle>();
lock();
alcSuspendContext(m_context);
AUD_Reference<AUD_OpenALDevice::AUD_OpenALHandle> sound;
try
{
// create the handle
sound = new AUD_OpenALDevice::AUD_OpenALHandle(this, format, reader, keep);
}
catch(AUD_Exception&)
{
alcProcessContext(m_context);
unlock();
throw;
}
alcProcessContext(m_context);
// play sound
m_playingSounds.push_back(sound);
start();
unlock();
return AUD_Reference<AUD_IHandle>(sound);
}
AUD_SRCResampleReader::AUD_SRCResampleReader(AUD_Reference<AUD_IReader> reader,
AUD_Specs specs) :
AUD_ResampleReader(reader, specs.rate),
m_channels(reader->getSpecs().channels),
m_position(0)
{
int error;
m_src = src_callback_new(src_callback,
SRC_SINC_MEDIUM_QUALITY,
m_channels,
&error,
this);
if(!m_src)
{
// XXX printf("%s\n", src_strerror(error));
AUD_THROW(AUD_ERROR_SRC, state_error);
}
}
void AUD_setSequencerDeviceSpecs(AUD_Sound* sequencer)
{
dynamic_cast<AUD_SequencerFactory*>(sequencer->get())->setSpecs(AUD_device->getSpecs().specs);
}
