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/*************************************************************************/
/* audio_stream_sample.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef AUDIOSTREAMSAMPLE_H
#define AUDIOSTREAMSAMPLE_H
#include "servers/audio/audio_stream.h"
class AudioStreamSample;
class AudioStreamPlaybackSample : public AudioStreamPlayback {
GDCLASS(AudioStreamPlaybackSample, AudioStreamPlayback)
enum {
MIX_FRAC_BITS = 13,
MIX_FRAC_LEN = (1 << MIX_FRAC_BITS),
MIX_FRAC_MASK = MIX_FRAC_LEN - 1,
};
struct IMA_ADPCM_State {
int16_t step_index;
int32_t predictor;
/* values at loop point */
int16_t loop_step_index;
int32_t loop_predictor;
int32_t last_nibble;
int32_t loop_pos;
int32_t window_ofs;
} ima_adpcm[2];
int64_t offset;
int sign;
bool active;
friend class AudioStreamSample;
Ref<AudioStreamSample> base;
template <class Depth, bool is_stereo, bool is_ima_adpcm>
void do_resample(const Depth *p_src, AudioFrame *p_dst, int64_t &offset, int32_t &increment, uint32_t amount, IMA_ADPCM_State *ima_adpcm);
public:
virtual void start(float p_from_pos = 0.0);
virtual void stop();
virtual bool is_playing() const;
virtual int get_loop_count() const; //times it looped
virtual float get_pos() const;
virtual void seek_pos(float p_time);
virtual void mix(AudioFrame *p_buffer, float p_rate_scale, int p_frames);
virtual float get_length() const; //if supported, otherwise return 0
AudioStreamPlaybackSample();
};
class AudioStreamSample : public AudioStream {
GDCLASS(AudioStreamSample, AudioStream)
RES_BASE_EXTENSION("sample")
public:
enum Format {
FORMAT_8_BITS,
FORMAT_16_BITS,
FORMAT_IMA_ADPCM
};
enum LoopMode {
LOOP_DISABLED,
LOOP_FORWARD,
LOOP_PING_PONG
};
private:
friend class AudioStreamPlaybackSample;
enum {
DATA_PAD = 16 //padding for interpolation
};
Format format;
LoopMode loop_mode;
bool stereo;
int loop_begin;
int loop_end;
int mix_rate;
void *data;
uint32_t data_bytes;
protected:
static void _bind_methods();
public:
void set_format(Format p_format);
Format get_format() const;
void set_loop_mode(LoopMode p_loop_mode);
LoopMode get_loop_mode() const;
void set_loop_begin(int p_frame);
int get_loop_begin() const;
void set_loop_end(int p_frame);
int get_loop_end() const;
void set_mix_rate(int p_hz);
int get_mix_rate() const;
void set_stereo(bool p_enable);
bool is_stereo() const;
void set_data(const PoolVector<uint8_t> &p_data);
PoolVector<uint8_t> get_data() const;
virtual Ref<AudioStreamPlayback> instance_playback();
virtual String get_stream_name() const;
AudioStreamSample();
~AudioStreamSample();
};
VARIANT_ENUM_CAST(AudioStreamSample::Format)
VARIANT_ENUM_CAST(AudioStreamSample::LoopMode)
#endif // AUDIOSTREAMSample_H
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