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#include "main.h"
#include "ExtendedRead.h"
extern WM_MEDIA_TYPE *NewMediaType(IWMOutputMediaProps *props);
ExtendedReadStruct::ExtendedReadStruct() : buffer(0), reader(0), streamNum(0), bufferUsed(0), endOfFile(false), length(0)
{}
ExtendedReadStruct::ExtendedReadStruct(IWMSyncReader *_reader) : buffer(0), reader(0), streamNum(0), bufferUsed(0), endOfFile(false), length(0)
{
reader = _reader;
reader->AddRef();
}
#define CBCLASS ExtendedReadStruct
START_DISPATCH;
CB(IFC_AUDIOSTREAM_READAUDIO, ReadAudio)
END_DISPATCH;
ExtendedReadStruct::~ExtendedReadStruct()
{
if (reader)
{
reader->Close();
reader->Release();
}
if (buffer)
buffer->Release();
}
size_t ExtendedReadStruct::ReadAudio(void *_buffer, size_t len)
{
__int8 *dest = reinterpret_cast<__int8 *>(_buffer);
int bytesCopied = 0;
/*
while we still have bytes left
{
read a buffer
copy buffer to user passed buffer
if we have stuff left in the buffer, save it and return
if we hit EOF, return
}
*/
size_t frameSize = (BitSize()/8)*Channels();
len -= (len % frameSize); // only do whole frames
while (len)
{
if (buffer)
{
BYTE *bufferBytes;
DWORD bufferTotal;
buffer->GetBufferAndLength(&bufferBytes, &bufferTotal);
if (bufferUsed < bufferTotal)
{
size_t toCopy = min(bufferTotal - bufferUsed, len);
memcpy(dest, bufferBytes + bufferUsed, toCopy);
bufferUsed += toCopy;
len -= toCopy;
dest += toCopy;
bytesCopied += toCopy;
if (bufferUsed == bufferTotal)
{
bufferUsed = 0;
buffer->Release();
buffer = 0;
}
}
}
else if (!endOfFile)
{
QWORD sampleTime, duration;
DWORD flags;
DWORD outputNum;
WORD streamNum2;
HRESULT hr;
hr = reader->GetNextSample(streamNum, &buffer, &sampleTime, &duration, &flags, & outputNum, &streamNum2);
if (hr == NS_E_NO_MORE_SAMPLES)
endOfFile = true;
}
else
return bytesCopied;
}
return bytesCopied;
}
bool ExtendedReadStruct::Open(const wchar_t *filename)
{
//mod.InitWM();
if (!reader)
{
if (!SUCCEEDED(WMCreateSyncReader(NULL, 0, &reader)))
{
reader = 0;
return false;
}
}
if (SUCCEEDED(reader->Open(filename)))
{
return true;
}
else
{
reader->Release();
reader = 0;
return false;
}
}
bool ExtendedReadStruct::FindOutput(int bits, int channels)
{
DWORD numOutputs, output, format, numFormats;
IWMOutputMediaProps *formatProperties;
GUID mediaType;
DWORD audioOutputNum;
if (FAILED((reader->GetOutputCount(&numOutputs))))
return false;
for (output = 0;output < numOutputs;output++)
{
HRESULT hr;
DWORD speakerConfig;
switch (channels)
{
case 1:
speakerConfig = DSSPEAKER_MONO;
break;
case 2:
speakerConfig = DSSPEAKER_STEREO;
break;
case 0:
default:
speakerConfig = config_audio_num_channels; // TODO: force max channels?
}
hr = reader->SetOutputSetting(output, g_wszSpeakerConfig, WMT_TYPE_DWORD, (BYTE *) & speakerConfig, sizeof(speakerConfig));
assert(hr == S_OK);
BOOL discreteChannels = TRUE;
hr = reader->SetOutputSetting(output, g_wszEnableDiscreteOutput, WMT_TYPE_BOOL, (BYTE *) & discreteChannels , sizeof(discreteChannels));
assert(hr == S_OK);
if (FAILED(reader->GetOutputFormatCount(output, &numFormats)))
continue;
for (format = 0;format < numFormats;format++)
{
reader->GetOutputFormat(output, format, &formatProperties);
formatProperties->GetType(&mediaType);
if (mediaType != WMMEDIATYPE_Audio)
continue;
WM_MEDIA_TYPE *mediaType = NewMediaType(formatProperties);
if (mediaType->subtype == WMMEDIASUBTYPE_PCM)
{
if (bits)
{
WAVEFORMATEXTENSIBLE *waveFormat = (WAVEFORMATEXTENSIBLE *) mediaType->pbFormat;
if (waveFormat->Format.cbSize >= 22)
waveFormat->Samples.wValidBitsPerSample = bits;
waveFormat->Format.wBitsPerSample = bits;
waveFormat->Format.nBlockAlign = (waveFormat->Format.wBitsPerSample / 8) * waveFormat->Format.nChannels;
waveFormat->Format.nAvgBytesPerSec = waveFormat->Format.nSamplesPerSec * waveFormat->Format.nBlockAlign;
if (FAILED(formatProperties->SetMediaType(mediaType)))
{
// blah, just use the default settings then
delete[] mediaType;
mediaType = NewMediaType(formatProperties);
}
}
AudioFormat::Open(mediaType);
delete[] mediaType;
audioOutputNum = output;
reader->SetOutputProps(audioOutputNum, formatProperties);
reader->GetStreamNumberForOutput(audioOutputNum, &streamNum);
formatProperties->Release();
reader->SetReadStreamSamples(streamNum, FALSE);
IWMHeaderInfo *headerInfo = 0;
reader->QueryInterface(&headerInfo);
WMT_ATTR_DATATYPE type = WMT_TYPE_QWORD;
WORD byteLength = sizeof(QWORD);
WORD blah = 0;
headerInfo->GetAttributeByName(&blah, g_wszWMDuration, &type, (BYTE *)&length, &byteLength);
headerInfo->Release();
return true;
}
delete[] mediaType;
formatProperties->Release();
}
}
return false;
}
extern "C"
__declspec(dllexport) intptr_t winampGetExtendedRead_openW(const wchar_t *fn, int *size, int *bps, int *nch, int *srate)
{
ExtendedReadStruct *read = new ExtendedReadStruct;
if (read->Open(fn)
&& read->FindOutput(*bps, *nch))
{
*nch = read->Channels();
*bps = read->BitSize();
*srate = read->SampleRate();
__int64 bytespersec = ((*nch) * (*bps / 8) * (*srate));
__int64 s = (bytespersec * ((__int64)read->length)) / (__int64)(1000 * 10000);
*size = (int)s;
return reinterpret_cast<intptr_t>(read);
}
else
{
delete read;
return 0;
}
}
extern "C"
__declspec(dllexport) intptr_t winampGetExtendedRead_getData(intptr_t handle, char *dest, int len, int *killswitch)
{
ExtendedReadStruct *read = reinterpret_cast<ExtendedReadStruct *>(handle);
return read->ReadAudio(dest, len);
}
extern "C"
__declspec(dllexport) void winampGetExtendedRead_close(intptr_t handle)
{
ExtendedReadStruct *read = reinterpret_cast<ExtendedReadStruct *>(handle);
delete read;
}
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