virtualx-engine/modules/mpc/audio_stream_mpc.h

/*************************************************************************/
/*  audio_stream_mpc.h                                                   */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
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#ifndef AUDIO_STREAM_MPC_H
#define AUDIO_STREAM_MPC_H

#include "io/resource_loader.h"
#include "os/file_access.h"
#include "os/thread_safe.h"
#include "scene/resources/audio_stream.h"

#include <mpc/mpcdec.h>

class AudioStreamPlaybackMPC : public AudioStreamPlayback {

	OBJ_TYPE(AudioStreamPlaybackMPC, AudioStreamPlayback);

	bool preload;
	FileAccess *f;
	String file;
	DVector<uint8_t> data;
	int data_ofs;
	int streamlen;

	bool active;
	bool paused;
	bool loop;
	int loops;

	// mpc
	mpc_reader reader;
	mpc_demux *demux;
	mpc_streaminfo si;
	MPC_SAMPLE_FORMAT sample_buffer[MPC_DECODER_BUFFER_LENGTH];

	static mpc_int32_t _mpc_read(mpc_reader *p_reader, void *p_dst, mpc_int32_t p_bytes);
	static mpc_bool_t _mpc_seek(mpc_reader *p_reader, mpc_int32_t p_offset);
	static mpc_int32_t _mpc_tell(mpc_reader *p_reader);
	static mpc_int32_t _mpc_get_size(mpc_reader *p_reader);
	static mpc_bool_t _mpc_canseek(mpc_reader *p_reader);

	int stream_min_size;
	int stream_rate;
	int stream_channels;

protected:
	Error _open_file();
	void _close_file();
	int _read_file(void *p_dst, int p_bytes);
	bool _seek_file(int p_pos);
	int _tell_file() const;
	int _sizeof_file() const;
	bool _canseek_file() const;

	Error _reload();
	static void _bind_methods();

public:
	void set_file(const String &p_file);
	String get_file() const;

	virtual void play(float p_offset = 0);
	virtual void stop();
	virtual bool is_playing() const;

	virtual void set_loop(bool p_enable);
	virtual bool has_loop() const;

	virtual float get_length() const;

	virtual String get_stream_name() const;

	virtual int get_loop_count() const;

	virtual float get_pos() const;
	virtual void seek_pos(float p_time);

	virtual int get_channels() const { return stream_channels; }
	virtual int get_mix_rate() const { return stream_rate; }

	virtual int get_minimum_buffer_size() const { return stream_min_size; }
	virtual int mix(int16_t *p_bufer, int p_frames);

	virtual void set_loop_restart_time(float p_time) {}

	AudioStreamPlaybackMPC();
	~AudioStreamPlaybackMPC();
};

class AudioStreamMPC : public AudioStream {

	OBJ_TYPE(AudioStreamMPC, AudioStream);

	String file;

public:
	Ref<AudioStreamPlayback> instance_playback() {
		Ref<AudioStreamPlaybackMPC> pb = memnew(AudioStreamPlaybackMPC);
		pb->set_file(file);
		return pb;
	}

	void set_file(const String &p_file) { file = p_file; }
};

class ResourceFormatLoaderAudioStreamMPC : public ResourceFormatLoader {
public:
	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = NULL);
	virtual void get_recognized_extensions(List<String> *p_extensions) const;
	virtual bool handles_type(const String &p_type) const;
	virtual String get_resource_type(const String &p_path) const;
};

#endif // AUDIO_STREAM_MPC_H