129 lines
2.8 KiB
C++
129 lines
2.8 KiB
C++
#ifndef AUDIO_STREAM_SAMPLE_H
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#define AUDIO_STREAM_SAMPLE_H
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/* audio_stream_sample.h */
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#include "servers/audio/audio_stream.h"
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class AudioStreamSample;
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class AudioStreamPlaybackSample : public AudioStreamPlayback {
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GDCLASS(AudioStreamPlaybackSample, AudioStreamPlayback);
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enum {
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MIX_FRAC_BITS = 13,
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MIX_FRAC_LEN = (1 << MIX_FRAC_BITS),
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MIX_FRAC_MASK = MIX_FRAC_LEN - 1,
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};
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struct IMA_ADPCM_State {
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int16_t step_index;
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int32_t predictor;
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/* values at loop point */
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int16_t loop_step_index;
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int32_t loop_predictor;
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int32_t last_nibble;
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int32_t loop_pos;
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int32_t window_ofs;
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} ima_adpcm[2];
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int64_t offset;
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int sign;
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bool active;
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friend class AudioStreamSample;
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Ref<AudioStreamSample> base;
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template <class Depth, bool is_stereo, bool is_ima_adpcm>
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void do_resample(const Depth *p_src, AudioFrame *p_dst, int64_t &offset, int32_t &increment, uint32_t amount, IMA_ADPCM_State *ima_adpcm);
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public:
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virtual void start(float p_from_pos = 0.0);
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virtual void stop();
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virtual bool is_playing() const;
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virtual int get_loop_count() const; //times it looped
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virtual float get_playback_position() const;
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virtual void seek(float p_time);
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virtual void mix(AudioFrame *p_buffer, float p_rate_scale, int p_frames);
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AudioStreamPlaybackSample();
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};
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class AudioStreamSample : public AudioStream {
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GDCLASS(AudioStreamSample, AudioStream);
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RES_BASE_EXTENSION("sample")
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public:
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enum Format {
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FORMAT_8_BITS,
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FORMAT_16_BITS,
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FORMAT_IMA_ADPCM
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};
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// Keep the ResourceImporterWAV `edit/loop_mode` enum hint in sync with these options.
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enum LoopMode {
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LOOP_DISABLED,
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LOOP_FORWARD,
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LOOP_PING_PONG,
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LOOP_BACKWARD
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};
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private:
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friend class AudioStreamPlaybackSample;
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enum {
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DATA_PAD = 16 //padding for interpolation
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};
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Format format;
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LoopMode loop_mode;
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bool stereo;
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int loop_begin;
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int loop_end;
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int mix_rate;
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void *data;
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uint32_t data_bytes;
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protected:
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static void _bind_methods();
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public:
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void set_format(Format p_format);
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Format get_format() const;
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void set_loop_mode(LoopMode p_loop_mode);
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LoopMode get_loop_mode() const;
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void set_loop_begin(int p_frame);
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int get_loop_begin() const;
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void set_loop_end(int p_frame);
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int get_loop_end() const;
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void set_mix_rate(int p_hz);
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int get_mix_rate() const;
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void set_stereo(bool p_enable);
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bool is_stereo() const;
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virtual float get_length() const; //if supported, otherwise return 0
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void set_data(const PoolVector<uint8_t> &p_data);
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PoolVector<uint8_t> get_data() const;
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Error save_to_wav(const String &p_path);
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virtual Ref<AudioStreamPlayback> instance_playback();
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virtual String get_stream_name() const;
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AudioStreamSample();
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~AudioStreamSample();
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};
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VARIANT_ENUM_CAST(AudioStreamSample::Format)
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VARIANT_ENUM_CAST(AudioStreamSample::LoopMode)
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#endif // AUDIO_STREAM_SAMPLE_H
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