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#ifndef AUDIOGRAPHER_CHUNKER_H
#define AUDIOGRAPHER_CHUNKER_H
#include "audiographer/visibility.h"
#include "audiographer/flag_debuggable.h"
#include "audiographer/sink.h"
#include "audiographer/type_utils.h"
#include "audiographer/utils/listed_source.h"
namespace AudioGrapher
{
/// A class that chunks process cycles into equal sized frames
template<typename T = DefaultSampleType>
class /*LIBAUDIOGRAPHER_API*/ Chunker
: public ListedSource<T>
, public Sink<T>
, public FlagDebuggable<>
{
public:
/** Constructs a new Chunker with a constant chunk size.
* \n NOT RT safe
*/
Chunker (framecnt_t chunk_size)
: chunk_size (chunk_size)
, position (0)
{
buffer = new T[chunk_size];
add_supported_flag (ProcessContext<T>::EndOfInput);
}
~Chunker()
{
delete [] buffer;
}
/** Outputs data in \a context in chunks with the size specified in the constructor.
* Note that some calls might not produce any output, while others may produce several.
* \n RT safe
*/
void process (ProcessContext<T> const & context)
{
check_flags (*this, context);
framecnt_t frames_left = context.frames();
framecnt_t input_position = 0;
while (position + frames_left >= chunk_size) {
// Copy from context to buffer
framecnt_t const frames_to_copy = chunk_size - position;
TypeUtils<T>::copy (&context.data()[input_position], &buffer[position], frames_to_copy);
// Update counters
position = 0;
input_position += frames_to_copy;
frames_left -= frames_to_copy;
// Output whole buffer
ProcessContext<T> c_out (context, buffer, chunk_size);
if (frames_left) { c_out.remove_flag(ProcessContext<T>::EndOfInput); }
ListedSource<T>::output (c_out);
}
if (frames_left) {
// Copy the rest of the data
TypeUtils<T>::copy (&context.data()[input_position], &buffer[position], frames_left);
position += frames_left;
}
if (context.has_flag (ProcessContext<T>::EndOfInput) && position > 0) {
ProcessContext<T> c_out (context, buffer, position);
ListedSource<T>::output (c_out);
}
}
using Sink<T>::process;
private:
framecnt_t chunk_size;
framecnt_t position;
T * buffer;
};
} // namespace
#endif // AUDIOGRAPHER_CHUNKER_H
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