godot/modules/vorbis/audio_stream_ogg_vorbis.h
reduz d1ddee2258 Implement BPM support
Based on #62896, only implements the BPM support part.

* Implements BPM support in the AudioStreamOGG/MP3 importers.
* Can select BPM/Bar Size and total beats in a song file, as well as edit looping points.
* Looping is now BPM aware
* Added a special importer UI for configuring this.
* Added a special preview showing the audio waveform as well as the playback position in the resource picker.
* Renamed `AudioStream::instance` to `instantiate` for correctness.
2022-07-23 07:31:17 +02:00

157 lines
5.5 KiB
C++

/*************************************************************************/
/* audio_stream_ogg_vorbis.h */
/*************************************************************************/
/* This file is part of: */
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/* https://godotengine.org */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
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#ifndef AUDIO_STREAM_LIBVORBIS_H
#define AUDIO_STREAM_LIBVORBIS_H
#include "core/variant/variant.h"
#include "modules/ogg/ogg_packet_sequence.h"
#include "servers/audio/audio_stream.h"
#include "thirdparty/libvorbis/vorbis/codec.h"
class AudioStreamOGGVorbis;
class AudioStreamPlaybackOGGVorbis : public AudioStreamPlaybackResampled {
GDCLASS(AudioStreamPlaybackOGGVorbis, AudioStreamPlaybackResampled);
uint32_t frames_mixed = 0;
bool active = false;
int loops = 0;
enum {
FADE_SIZE = 256
};
AudioFrame loop_fade[FADE_SIZE];
int loop_fade_remaining = FADE_SIZE;
vorbis_info info;
vorbis_comment comment;
vorbis_dsp_state dsp_state;
vorbis_block block;
bool info_is_allocated = false;
bool comment_is_allocated = false;
bool dsp_state_is_allocated = false;
bool block_is_allocated = false;
bool ready = false;
bool have_samples_left = false;
bool have_packets_left = false;
friend class AudioStreamOGGVorbis;
Ref<OGGPacketSequence> vorbis_data;
Ref<OGGPacketSequencePlayback> vorbis_data_playback;
Ref<AudioStreamOGGVorbis> vorbis_stream;
int _mix_frames(AudioFrame *p_buffer, int p_frames);
int _mix_frames_vorbis(AudioFrame *p_buffer, int p_frames);
// Allocates vorbis data structures. Returns true upon success, false on failure.
bool _alloc_vorbis();
protected:
virtual int _mix_internal(AudioFrame *p_buffer, int p_frames) override;
virtual float get_stream_sampling_rate() override;
public:
virtual void start(float p_from_pos = 0.0) override;
virtual void stop() override;
virtual bool is_playing() const override;
virtual int get_loop_count() const override; //times it looped
virtual float get_playback_position() const override;
virtual void seek(float p_time) override;
virtual void tag_used_streams() override;
AudioStreamPlaybackOGGVorbis() {}
~AudioStreamPlaybackOGGVorbis();
};
class AudioStreamOGGVorbis : public AudioStream {
GDCLASS(AudioStreamOGGVorbis, AudioStream);
OBJ_SAVE_TYPE(AudioStream); // Saves derived classes with common type so they can be interchanged.
RES_BASE_EXTENSION("oggvorbisstr");
friend class AudioStreamPlaybackOGGVorbis;
int channels = 1;
float length = 0.0;
bool loop = false;
float loop_offset = 0.0;
// Performs a seek to the beginning of the stream, should not be called during playback!
// Also causes allocation and deallocation.
void maybe_update_info();
Ref<OGGPacketSequence> packet_sequence;
double bpm = 0;
int beat_count = 0;
int bar_beats = 4;
protected:
static void _bind_methods();
public:
void set_loop(bool p_enable);
virtual bool has_loop() const override;
void set_loop_offset(float p_seconds);
float get_loop_offset() const;
void set_bpm(double p_bpm);
virtual double get_bpm() const override;
void set_beat_count(int p_beat_count);
virtual int get_beat_count() const override;
void set_bar_beats(int p_bar_beats);
virtual int get_bar_beats() const override;
virtual Ref<AudioStreamPlayback> instantiate_playback() override;
virtual String get_stream_name() const override;
void set_packet_sequence(Ref<OGGPacketSequence> p_packet_sequence);
Ref<OGGPacketSequence> get_packet_sequence() const;
virtual float get_length() const override; //if supported, otherwise return 0
virtual bool is_monophonic() const override;
AudioStreamOGGVorbis();
virtual ~AudioStreamOGGVorbis();
};
#endif // AUDIO_STREAM_LIBVORBIS_H