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Fixed some weirdness when reading CDDA data in Windows. The beginning of

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tracks don't seem skip anymore.
This commit is contained in:
casey langen 2017-03-27 23:07:51 -07:00
parent e49506fe3c
commit 8c9117f437
3 changed files with 46 additions and 78 deletions
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79
src/contrib/cddadecoder/CddaDataStream.cpp
View File

@ -38,31 +38,16 @@
#include <set>
#include <mutex>
#define FRAMES_PER_SECOND 75
#define FRAMES_PER_MINUTE (60 * FRAMES_PER_SECOND)
#define FRAMES_PER_PREGAP (2 * FRAMES_PER_SECOND)
#define RAW_SECTOR_SIZE 2352
#define MSF2UINT(hgs) ((hgs[1]*4500) + (hgs[2]*75) + (hgs[3]))
#define MSF2UINT(hgs) ((hgs[1] * FRAMES_PER_MINUTE) + (hgs[2] * FRAMES_PER_SECOND) + (hgs[3]))
static CddaDataStream* active = NULL;
static std::mutex activeMutex;
static void setActive(CddaDataStream* stream) {
std::unique_lock<std::mutex> lock(activeMutex);
if (active != NULL) {
active->Close();
active = NULL;
}
active = stream;
}
static void resetIfActive(CddaDataStream* stream) {
std::unique_lock<std::mutex> lock(activeMutex);
if (stream == active) {
active = NULL;
}
}
CddaDataStream::CddaDataStream() {
this->closed = false;
this->drive = INVALID_HANDLE_VALUE;
@ -73,7 +58,6 @@ CddaDataStream::CddaDataStream() {
CddaDataStream::~CddaDataStream() {
this->Close();
resetIfActive(this);
}
int CddaDataStream::GetChannelCount() {
@ -107,10 +91,10 @@ bool CddaDataStream::Open(const char *uri, unsigned int options) {
drivePath.c_str(),
GENERIC_READ,
FILE_SHARE_READ,
NULL,
nullptr,
OPEN_EXISTING,
FILE_ATTRIBUTE_READONLY | FILE_FLAG_SEQUENTIAL_SCAN,
(HANDLE) NULL);
0,
(HANDLE) nullptr);
if (this->drive == INVALID_HANDLE_VALUE) {
return false;
@ -134,7 +118,7 @@ bool CddaDataStream::Open(const char *uri, unsigned int options) {
this->toc.FirstTrack <= trackIndex &&
trackIndex <= this->toc.LastTrack;
if (!canReadFromDevice && !trackIndexValid) {
if (!canReadFromDevice || !trackIndexValid) {
this->Close();
return false;
}
@ -154,12 +138,9 @@ bool CddaDataStream::Open(const char *uri, unsigned int options) {
this->channels = 4;
}
this->startSector = MSF2UINT(this->toc.TrackData[trackIndex - 1].Address) - 150;
this->stopSector = MSF2UINT(this->toc.TrackData[trackIndex].Address) - 150;
this->startSector = MSF2UINT(this->toc.TrackData[trackIndex - 1].Address) - FRAMES_PER_PREGAP;
this->stopSector = MSF2UINT(this->toc.TrackData[trackIndex].Address) - FRAMES_PER_PREGAP;
this->length = (this->stopSector - this->startSector) * RAW_SECTOR_SIZE;
setActive(this);
this->uri = uri;
return true;
@ -234,45 +215,33 @@ HRESULT CddaDataStream::Read(PBYTE pbBuffer, DWORD dwBytesToRead, BOOL bAlign, L
return S_FALSE;
}
BYTE buff[RAW_SECTOR_SIZE];
PBYTE pbBufferOrg = pbBuffer;
LONGLONG pos = this->position;
size_t len = (size_t) dwBytesToRead;
while (pos >= 0 && pos < this->length && len > 0) {
RAW_READ_INFO rawreadinfo;
rawreadinfo.SectorCount = 1;
rawreadinfo.TrackMode = CDDA;
UINT sectorOffset = this->startSector + (int)(pos / RAW_SECTOR_SIZE);
UINT sector = this->startSector + int(pos / RAW_SECTOR_SIZE);
__int64 offset = pos % RAW_SECTOR_SIZE;
RAW_READ_INFO rawReadInfo;
rawReadInfo.SectorCount = 1;
rawReadInfo.TrackMode = CDDA;
rawReadInfo.DiskOffset.QuadPart = sectorOffset * 2048;
rawreadinfo.DiskOffset.QuadPart = sector * 2048;
DWORD bytesRead = 0;
DWORD bytesActuallyRead = 0;
DeviceIoControl(
this->drive,
IOCTL_CDROM_RAW_READ,
&rawreadinfo,
sizeof(rawreadinfo),
buff, RAW_SECTOR_SIZE,
&bytesRead,
&rawReadInfo,
sizeof(rawReadInfo),
pbBuffer,
dwBytesToRead,
&bytesActuallyRead,
0);
size_t l = (size_t)min(min(len, RAW_SECTOR_SIZE - offset), this->length - pos);
memcpy(pbBuffer, &buff[offset], l);
pbBuffer += l;
pos += l;
len -= l;
}
if (pdwBytesRead) {
*pdwBytesRead = pbBuffer - pbBufferOrg;
*pdwBytesRead = bytesActuallyRead;
}
this->position += pbBuffer - pbBufferOrg;
this->position += bytesActuallyRead;
return S_OK;
}

8
src/contrib/cddadecoder/CddaDecoder.cpp
View File

@ -55,7 +55,6 @@ void CddaDecoder::Destroy() {
bool CddaDecoder::Open(IDataStream* data) {
this->data = (CddaDataStream *) data;
this->duration = (double)(data->Length() / sizeof(int)) / 44100.0f;
return (data != NULL);
}
@ -70,6 +69,10 @@ double CddaDecoder::SetPosition(double seconds) {
}
double CddaDecoder::GetDuration() {
if (this->duration == -1.0f) {
this->duration = (double)(data->Length() / data->GetChannelCount() / sizeof(short)) / 44100.0f;
}
return this->duration;
}
@ -87,8 +90,7 @@ bool CddaDecoder::GetBuffer(IBuffer *buffer) {
if (count > 0) {
short* t = (short*) this->buffer;
for (int x = 0; x < (count / BYTES_PER_RAW_SAMPLE); x++)
{
for (int x = 0; x < (count / BYTES_PER_RAW_SAMPLE); x++) {
target[x] = (float) t[x] / 16384.0f;
}

9
src/contrib/cddadecoder/CddaDecoder.h
View File

@ -42,11 +42,8 @@
using namespace musik::core::sdk;
class CddaDecoder : public IDecoder
{
private:
public:
class CddaDecoder : public IDecoder {
public:
CddaDecoder();
~CddaDecoder();
@ -56,7 +53,7 @@ public:
double GetDuration();
bool GetBuffer(IBuffer *buffer);
private:
private:
CddaDataStream* data;
double duration;
BYTE* buffer;