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#ifndef AUDIOGRAPHER_SNDFILE_WRITER_H
#define AUDIOGRAPHER_SNDFILE_WRITER_H
#include <boost/signals2.hpp>
#include <boost/format.hpp>
#include <string>
#include "audiographer/flag_debuggable.h"
#include "audiographer/sink.h"
#include "audiographer/types.h"
#include "audiographer/sndfile/sndfile_base.h"
#include "audiographer/broadcast_info.h"
#include "pbd/signals.h"
namespace AudioGrapher
{
/** Writer for audio files using libsndfile.
* Only short, int and float are valid template parameters
*/
template <typename T = DefaultSampleType>
class SndfileWriter
: public virtual SndfileBase
, public Sink<T>
, public Throwing<>
, public FlagDebuggable<>
{
public:
SndfileWriter (std::string const & path, int format, ChannelCount channels, nframes_t samplerate, boost::shared_ptr<BroadcastInfo> broadcast_info)
: SndfileHandle (path, Write, format, channels, samplerate)
, path (path)
{
add_supported_flag (ProcessContext<T>::EndOfInput);
if (broadcast_info) {
broadcast_info->write_to_file (this);
}
}
virtual ~SndfileWriter () {}
SndfileWriter (SndfileWriter const & other) : SndfileHandle (other) {}
using SndfileHandle::operator=;
/// Writes data to file
void process (ProcessContext<T> const & c)
{
check_flags (*this, c);
if (throw_level (ThrowStrict) && c.channels() != channels()) {
throw Exception (*this, boost::str (boost::format
("Wrong number of channels given to process(), %1% instead of %2%")
% c.channels() % channels()));
}
nframes_t written = write (c.data(), c.frames());
if (throw_level (ThrowProcess) && written != c.frames()) {
throw Exception (*this, boost::str (boost::format
("Could not write data to output file (%1%)")
% strError()));
}
if (c.has_flag(ProcessContext<T>::EndOfInput)) {
writeSync();
FileWritten (path);
}
}
using Sink<T>::process;
PBD::Signal1<void, std::string> FileWritten;
protected:
/// SndfileHandle has to be constructed directly by deriving classes
SndfileWriter ()
{
add_supported_flag (ProcessContext<T>::EndOfInput);
}
protected:
std::string path;
};
} // namespace
#endif // AUDIOGRAPHER_SNDFILE_WRITER_H
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