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#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;
const uint8_t *ptr;
} 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("smp")
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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