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#ifndef AUDIOGRAPHER_CMDPIPE_WRITER_H
#define AUDIOGRAPHER_CMDPIPE_WRITER_H
#include <string>
#include <boost/format.hpp>
#include "audiographer/flag_debuggable.h"
#include "audiographer/sink.h"
#include "audiographer/types.h"
#include "pbd/signals.h"
#include "pbd/system_exec.h"
namespace AudioGrapher
{
/** Writer for audio files using libsndfile.
* Only short, int and float are valid template parameters
*/
template <typename T = DefaultSampleType>
class CmdPipeWriter
: public Sink<T>
, public Throwing<>
, public FlagDebuggable<>
{
public:
CmdPipeWriter (PBD::SystemExec* proc, std::string const& path)
: samples_written (0)
, _proc (proc)
, _path (path)
{
add_supported_flag (ProcessContext<T>::EndOfInput);
}
virtual ~CmdPipeWriter () {
delete _proc;
}
samplecnt_t get_samples_written() const { return samples_written; }
void reset_samples_written_count() { samples_written = 0; }
void close (void)
{
_proc->terminate ();
}
virtual void process (ProcessContext<T> const & c)
{
check_flags (*this, c);
if (!_proc || !_proc->is_running()) {
throw Exception (*this, boost::str (boost::format
("Target encoder process is not running")));
}
const size_t bytes_per_sample = sizeof (T);
samplecnt_t const written = _proc->write_to_stdin ((const void*) c.data(), c.samples() * bytes_per_sample) / bytes_per_sample;
samples_written += written;
if (throw_level (ThrowProcess) && written != c.samples()) {
throw Exception (*this, boost::str (boost::format
("Could not write data to output file")));
}
if (c.has_flag(ProcessContext<T>::EndOfInput)) {
_proc->close_stdin ();
FileWritten (_path);
}
}
using Sink<T>::process;
PBD::Signal1<void, std::string> FileWritten;
private:
CmdPipeWriter (CmdPipeWriter const & other) {}
samplecnt_t samples_written;
PBD::SystemExec* _proc;
std::string _path;
};
} // namespace
#endif
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