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/*
* This file is part of AtracDEnc.
*
* AtracDEnc is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* AtracDEnc is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with AtracDEnc; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "../../../wav.h"
#include "../../../env.h"
#include <endian_tools.h>
#include "pcm_io_win32.h"
#include "../pcm_io_impl.h"
#include<windows.h>
static std::string GetLastErrorAsString()
{
DWORD errorMessageID = ::GetLastError();
if (errorMessageID == 0)
return std::string();
LPSTR messageBuffer = nullptr;
size_t size = FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, errorMessageID, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR)&messageBuffer, 0, NULL);
std::string message(messageBuffer, size);
LocalFree(messageBuffer);
return message;
}
class TPCMIOStreamWin32 : public IPCMProviderImpl {
public:
TPCMIOStreamWin32() {
ReadHandle_ = GetStdHandle(STD_INPUT_HANDLE);
if (ReadHandle_ == INVALID_HANDLE_VALUE) {
const std::string msg = "Unable to open input stream " + GetLastErrorAsString();
throw std::exception(msg.data());
}
static const DWORD headerSz = 24;
Buf_.resize(headerSz);
DWORD read;
if (ReadFile(ReadHandle_, Buf_.data(), headerSz, &read, NULL)) {
if (read != headerSz) {
throw std::exception("Not enough data to determinate format.");
}
const uint32_t offset = ParseHeader();
if (offset < headerSz) {
throw std::exception("incorrect data offset");
}
uint32_t toSkip = offset - headerSz;
while (toSkip) {
char c;
bool success;
success = ReadFile(ReadHandle_, &c, 1, &read, NULL);
if (!success || !read) {
throw std::exception("Unable to seek to data position");
}
toSkip--;
}
} else {
const std::string msg = "Unable to read header from pipe " + GetLastErrorAsString();
throw std::exception(msg.data());
}
}
size_t Read(TPCMBuffer& buf, size_t sz) override {
if (Finished_)
return 0;
DWORD bytesToRead = sz * 2 * ChannelsNum_; // 16 bit per sampple
Buf_.resize(bytesToRead);
DWORD pos = 0;
while (pos < bytesToRead) {
DWORD read;
bool success;
success = ReadFile(ReadHandle_, Buf_.data() + pos, bytesToRead - pos, &read, NULL);
if (!success || !read) {
Finished_ = true;
break;
}
pos += read;
}
size_t toConvert = pos / 2 / ChannelsNum_;
ConvertToPcmBufferFromBE(Buf_.data(), buf, toConvert, 0, ChannelsNum_);
return toConvert;
}
size_t Write(const TPCMBuffer& buf, size_t sz) override {
abort();
return 0;
}
size_t GetChannelsNum() const override {
return ChannelsNum_;
}
size_t GetSampleRate() const override {
return SampleRate_;
}
size_t GetTotalSamples() const override {
return (size_t)-1;
}
private:
static uint32_t ExtractValue(BYTE* buf) {
uint32_t tmp;
memcpy(&tmp, buf, 4);
return conv_ntoh(tmp);
}
uint32_t ParseHeader() {
static const std::vector<BYTE> magic = { '.', 's', 'n', 'd' };
if (!std::equal(Buf_.begin(), Buf_.begin() + magic.size(), magic.begin())) {
throw std::exception("Input stream must have AU(SND) format");
}
uint32_t dataOffset = ExtractValue(&Buf_[4]);
//uint32_t dataSize = ExtractValue(&Buf_[8]);
uint32_t encoding = ExtractValue(&Buf_[12]);
if (encoding != 3) {
throw std::exception("Expected PCM 16 bit format");
}
uint32_t sampleRate = ExtractValue(&Buf_[16]);
if (sampleRate != 44100) {
throw std::exception("Expected 44100Hz sampe rate");
}
ChannelsNum_ = ExtractValue(&Buf_[20]);
if (ChannelsNum_ != 1 && ChannelsNum_ != 2) {
throw std::exception("Expected 1 or 2 channels");
}
return dataOffset;
}
HANDLE ReadHandle_;
uint32_t ChannelsNum_ = 2;
const uint32_t SampleRate_ = 44100;
std::vector<BYTE> Buf_;
bool Finished_ = false;
};
IPCMProviderImpl* CreatePCMIOStreamWin32ReadImpl() {
return new TPCMIOStreamWin32();
}
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