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#pragma once
#include <memory>
#include <string>
#include <sndfile.hh>
#include "pcmengin.h"
class TFileAlreadyExists : public std::exception {
};
class TWavIOError : public std::exception {
const int ErrNum = 0;
const char* Text;
public:
TWavIOError(const char* str, int err)
: ErrNum(err)
, Text(str)
{
(void)ErrNum;
}
virtual const char* what() const throw() {
return Text;
}
};
template<class T>
class TWavPcmReader : public IPCMReader<T> {
public:
typedef std::function<void(TPCMBuffer<T>& data, const uint32_t size)> TLambda;
TLambda Lambda;
TWavPcmReader(TLambda lambda)
: Lambda(lambda)
{}
void Read(TPCMBuffer<T>& data , const uint32_t size) const override {
Lambda(data, size);
}
};
template<class T>
class TWavPcmWriter : public IPCMWriter<T> {
public:
typedef std::function<void(const TPCMBuffer<T>& data, const uint32_t size)> TLambda;
TLambda Lambda;
TWavPcmWriter(TLambda lambda)
: Lambda(lambda)
{}
void Write(const TPCMBuffer<T>& data , const uint32_t size) const override {
Lambda(data, size);
}
};
class TWav {
mutable SndfileHandle File;
public:
enum Mode {
E_READ,
E_WRITE
};
TWav(const std::string& filename); // reading
TWav(const std::string& filename, int channels, int sampleRate); //writing
~TWav();
uint32_t GetChannelNum() const;
uint32_t GetSampleRate() const;
uint64_t GetTotalSamples() const;
template<class T>
IPCMReader<T>* GetPCMReader() const;
template<class T>
IPCMWriter<T>* GetPCMWriter();
};
typedef std::unique_ptr<TWav> TWavPtr;
template<class T>
IPCMReader<T>* TWav::GetPCMReader() const {
return new TWavPcmReader<T>([this](TPCMBuffer<T>& data, const uint32_t size) {
if (data.Channels() != File.channels())
throw TWrongReadBuffer();
if (size_t read = File.readf(data[0], size) != size) {
assert(read < size);
//fprintf(stderr, "to zero: %d\n", size-read);
data.Zero(read, size - read);
}
});
}
template<class T>
IPCMWriter<T>* TWav::GetPCMWriter() {
return new TWavPcmWriter<T>([this](const TPCMBuffer<T>& data, const uint32_t size) {
if (data.Channels() != File.channels())
throw TWrongReadBuffer();
if (File.writef(data[0], size) != size) {
fprintf(stderr, "can't write block\n");
}
});
}
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