1 /* Copyright (C) 2021-2023 Harry Godden (hgn) - All Rights Reserved */
9 #include "vg/vg_stdint.h"
10 #include "vg/vg_platform.h"
14 #include "vg/vg_console.h"
15 #include "vg/vg_store.h"
16 #include "vg/vg_profiler.h"
23 #pragma GCC push_options
24 #pragma GCC optimize ("O3")
25 #pragma GCC diagnostic push
26 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
30 #define STB_VORBIS_MAX_CHANNELS 2
31 #include "submodules/stb/stb_vorbis.c"
38 #pragma GCC pop_options
39 #pragma GCC diagnostic pop
43 #define AUDIO_FRAME_SIZE 512
44 #define AUDIO_MIX_FRAME_SIZE 256
46 #define AUDIO_CHANNELS 32
48 #define AUDIO_FILTERS 16
49 #define AUDIO_FLAG_LOOP 0x1
50 #define AUDIO_FLAG_SPACIAL_3D 0x4
51 #define AUDIO_FLAG_AUTO_START 0x8
53 /* Vorbis will ALWAYS use the maximum amount of channels it can */
54 //#define AUDIO_FLAG_MONO 0x100 NOTE: This is the default, so its not used
55 #define AUDIO_FLAG_STEREO 0x200
56 #define AUDIO_FLAG_VORBIS 0x400
58 #define AUDIO_DECODE_SIZE (1024*256) /* 256 kb decoding buffers */
59 #define AUDIO_MUTE_VOLUME 0.0f
60 #define AUDIO_BASE_VOLUME 1.0f
62 typedef struct audio_clip audio_clip
;
63 typedef struct audio_channel audio_channel
;
64 typedef struct audio_lfo audio_lfo
;
75 static struct vg_audio_system
77 SDL_AudioDeviceID sdl_output_device
;
86 SDL_mutex
*mux_checker
,
91 u32 time
, time_startframe
;
92 float sqrt_polynomial_coefficient
;
101 k_lfo_polynomial_bipolar
106 float polynomial_coefficient
;
109 u32 editble_state_write_mask
;
111 oscillators
[ AUDIO_LFOS
];
116 char name
[32]; /* only editable while allocated == 0 */
117 audio_clip
*source
; /* ... */
119 u32 colour
; /* ... */
121 /* internal non-readable state
122 * -----------------------------*/
123 u32 cursor
, source_length
;
125 float volume_movement_start
,
131 stb_vorbis
*vorbis_handle
;
132 stb_vorbis_alloc vorbis_alloc
;
134 enum channel_activity
136 k_channel_activity_reset
, /* will advance if allocated==1, to wake */
137 k_channel_activity_wake
, /* will advance to either of next two */
138 k_channel_activity_alive
,
139 k_channel_activity_end
,
140 k_channel_activity_error
146 * editable structure, can be modified inside _lock and _unlock
147 * the edit mask tells which to copy into internal _, or to discard
148 * ----------------------------------------------------------------------
154 float volume
, /* current volume */
155 volume_target
, /* target volume */
163 v4f spacial_falloff
; /* xyz, range */
169 u32 editble_state_write_mask
;
171 channels
[ AUDIO_CHANNELS
];
173 /* System queue, and access from thread 0 */
174 int debug_ui
, debug_ui_3d
;
181 volume_target_internal
,
184 vg_audio
= { .volume_console
= 1.0f
};
186 #include "vg/vg_audio_dsp.h"
188 static struct vg_profile
189 _vg_prof_audio_decode
= {.mode
= k_profile_mode_accum
,
190 .name
= "[T2] audio_decode()"},
191 _vg_prof_audio_mix
= {.mode
= k_profile_mode_accum
,
192 .name
= "[T2] audio_mix()"},
193 _vg_prof_dsp
= {.mode
= k_profile_mode_accum
,
194 .name
= "[T2] dsp_process()"},
195 vg_prof_audio_decode
,
200 * These functions are called from the main thread and used to prevent bad
201 * access. TODO: They should be no-ops in release builds.
203 VG_STATIC
int audio_lock_checker_load(void)
206 SDL_LockMutex( vg_audio
.mux_checker
);
207 value
= vg_audio
.sync_locked
;
208 SDL_UnlockMutex( vg_audio
.mux_checker
);
212 VG_STATIC
void audio_lock_checker_store( int value
)
214 SDL_LockMutex( vg_audio
.mux_checker
);
215 vg_audio
.sync_locked
= value
;
216 SDL_UnlockMutex( vg_audio
.mux_checker
);
219 VG_STATIC
void audio_require_lock(void)
221 if( audio_lock_checker_load() )
224 vg_error( "Modifying sound effects systems requires locking\n" );
228 VG_STATIC
void audio_lock(void)
230 SDL_LockMutex( vg_audio
.mux_sync
);
231 audio_lock_checker_store(1);
234 VG_STATIC
void audio_unlock(void)
236 audio_lock_checker_store(0);
237 SDL_UnlockMutex( vg_audio
.mux_sync
);
240 VG_STATIC
void audio_mixer_callback( void *user
, u8
*stream
, int frame_count
);
241 VG_STATIC
void vg_audio_init(void)
243 vg_audio
.mux_checker
= SDL_CreateMutex();
244 vg_audio
.mux_sync
= SDL_CreateMutex();
246 /* TODO: Move here? */
247 vg_var_push( (struct vg_var
){
248 .name
= "debug_audio",
249 .data
= &vg_audio
.debug_ui
,
250 .data_type
= k_var_dtype_i32
,
251 .opt_i32
= { .min
=0, .max
=1, .clamp
=1 },
255 vg_var_push( (struct vg_var
){
257 .data
= &vg_audio
.volume_console
,
258 .data_type
= k_var_dtype_f32
,
259 .opt_f32
= { .min
=0.0f
, .max
=2.0f
, .clamp
=1 },
263 /* allocate memory */
266 vg_audio
.audio_pool
=
267 vg_create_linear_allocator( vg_mem
.rtmemory
, 1024*1024*32,
271 u32 decode_size
= AUDIO_DECODE_SIZE
* AUDIO_CHANNELS
;
272 vg_audio
.decode_buffer
= vg_linear_alloc( vg_mem
.rtmemory
, decode_size
);
276 SDL_AudioSpec spec_desired
, spec_got
;
277 spec_desired
.callback
= audio_mixer_callback
;
278 spec_desired
.channels
= 2;
279 spec_desired
.format
= AUDIO_F32
;
280 spec_desired
.freq
= 44100;
281 spec_desired
.padding
= 0;
282 spec_desired
.samples
= AUDIO_FRAME_SIZE
;
283 spec_desired
.silence
= 0;
284 spec_desired
.size
= 0;
285 spec_desired
.userdata
= NULL
;
287 vg_audio
.sdl_output_device
=
288 SDL_OpenAudioDevice( NULL
, 0, &spec_desired
, &spec_got
,0 );
290 if( vg_audio
.sdl_output_device
)
292 SDL_PauseAudioDevice( vg_audio
.sdl_output_device
, 0 );
297 "SDL_OpenAudioDevice failed. Your default audio device must support:\n"
298 " Frequency: 44100 hz\n"
299 " Buffer size: 512\n"
301 " Format: s16 or f32\n" );
304 vg_success( "Ready\n" );
307 VG_STATIC
void vg_audio_free(void)
310 SDL_CloseAudioDevice( vg_audio
.sdl_output_device
);
317 #define AUDIO_EDIT_VOLUME_SLOPE 0x1
318 #define AUDIO_EDIT_VOLUME 0x2
319 #define AUDIO_EDIT_LFO_PERIOD 0x4
320 #define AUDIO_EDIT_LFO_WAVE 0x8
321 #define AUDIO_EDIT_LFO_ATTACHMENT 0x10
322 #define AUDIO_EDIT_SPACIAL 0x20
323 #define AUDIO_EDIT_OWNERSHIP 0x40
324 #define AUDIO_EDIT_SAMPLING_RATE 0x80
326 static audio_channel
*audio_request_channel( audio_clip
*clip
, u32 flags
)
328 for( int i
=0; i
<AUDIO_CHANNELS
; i
++ )
330 audio_channel
*ch
= &vg_audio
.channels
[i
];
336 ch
->colour
= 0x00333333;
337 strcpy( ch
->name
, clip
->path
);
341 ch
->editable_state
.relinquished
= 0;
342 ch
->editable_state
.volume
= 1.0f
;
343 ch
->editable_state
.volume_target
= 1.0f
;
344 ch
->editable_state
.pan
= 0.0f
;
345 ch
->editable_state
.pan_target
= 0.0f
;
346 ch
->editable_state
.volume_rate
= 0;
347 ch
->editable_state
.pan_rate
= 0;
348 v4_copy((v4f
){0.0f
,0.0f
,0.0f
,1.0f
},ch
->editable_state
.spacial_falloff
);
349 ch
->editable_state
.lfo
= NULL
;
350 ch
->editable_state
.lfo_amount
= 0.0f
;
351 ch
->editable_state
.sampling_rate
= 1.0f
;
352 ch
->editble_state_write_mask
= 0x00;
360 static int audio_channel_finished( audio_channel
*ch
)
362 if( ch
->readable_activity
== k_channel_activity_end
)
368 static audio_channel
*audio_relinquish_channel( audio_channel
*ch
)
370 ch
->editable_state
.relinquished
= 1;
371 ch
->editble_state_write_mask
|= AUDIO_EDIT_OWNERSHIP
;
375 static void audio_channel_slope_volume( audio_channel
*ch
, float length
,
378 ch
->editable_state
.volume_target
= new_volume
;
379 ch
->editable_state
.volume_rate
= length
* 44100.0f
;
380 ch
->editble_state_write_mask
|= AUDIO_EDIT_VOLUME_SLOPE
;
383 static void audio_channel_set_sampling_rate( audio_channel
*ch
, float rate
)
385 ch
->editable_state
.sampling_rate
= rate
;
386 ch
->editble_state_write_mask
|= AUDIO_EDIT_SAMPLING_RATE
;
389 static void audio_channel_edit_volume( audio_channel
*ch
,
390 float new_volume
, int instant
)
394 ch
->editable_state
.volume
= new_volume
;
395 ch
->editble_state_write_mask
|= AUDIO_EDIT_VOLUME
;
399 audio_channel_slope_volume( ch
, 0.05f
, new_volume
);
403 static audio_channel
*audio_channel_fadeout( audio_channel
*ch
, float length
)
405 audio_channel_slope_volume( ch
, length
, 0.0f
);
406 return audio_relinquish_channel( ch
);
409 static void audio_channel_fadein( audio_channel
*ch
, float length
)
411 audio_channel_edit_volume( ch
, 0.0f
, 1 );
412 audio_channel_slope_volume( ch
, length
, 1.0f
);
415 static audio_channel
*audio_channel_crossfade( audio_channel
*ch
,
416 audio_clip
*new_clip
,
417 float length
, u32 flags
)
422 ch
= audio_channel_fadeout( ch
, length
);
424 audio_channel
*replacement
= audio_request_channel( new_clip
, flags
);
427 audio_channel_fadein( replacement
, length
);
432 static void audio_channel_sidechain_lfo( audio_channel
*ch
, int lfo_id
,
435 ch
->editable_state
.lfo
= &vg_audio
.oscillators
[ lfo_id
];
436 ch
->editable_state
.lfo_amount
= amount
;
437 ch
->editble_state_write_mask
|= AUDIO_EDIT_LFO_ATTACHMENT
;
440 static void audio_channel_set_spacial( audio_channel
*ch
, v3f co
, float range
)
442 if( ch
->flags
& AUDIO_FLAG_SPACIAL_3D
)
444 v3_copy( co
, ch
->editable_state
.spacial_falloff
);
447 ch
->editable_state
.spacial_falloff
[3] = 1.0f
;
449 ch
->editable_state
.spacial_falloff
[3] = 1.0f
/range
;
451 ch
->editble_state_write_mask
|= AUDIO_EDIT_SPACIAL
;
455 vg_warn( "Tried to set spacialization paramaters for 2D channel (%s)\n",
460 static int audio_oneshot_3d( audio_clip
*clip
, v3f position
,
461 float range
, float volume
)
463 audio_channel
*ch
= audio_request_channel( clip
, AUDIO_FLAG_SPACIAL_3D
);
467 audio_channel_set_spacial( ch
, position
, range
);
468 audio_channel_edit_volume( ch
, volume
, 1 );
469 ch
= audio_relinquish_channel( ch
);
477 static int audio_oneshot( audio_clip
*clip
, float volume
, float pan
)
479 audio_channel
*ch
= audio_request_channel( clip
, 0x00 );
483 audio_channel_edit_volume( ch
, volume
, 1 );
484 ch
= audio_relinquish_channel( ch
);
492 static void audio_set_lfo_wave( int id
, enum lfo_wave_type type
,
495 audio_lfo
*lfo
= &vg_audio
.oscillators
[ id
];
496 lfo
->editable_state
.polynomial_coefficient
= coefficient
;
497 lfo
->editable_state
.wave_type
= type
;
499 lfo
->editble_state_write_mask
|= AUDIO_EDIT_LFO_WAVE
;
502 static void audio_set_lfo_frequency( int id
, float freq
)
504 audio_lfo
*lfo
= &vg_audio
.oscillators
[ id
];
505 lfo
->editable_state
.period
= 44100.0f
/ freq
;
506 lfo
->editble_state_write_mask
|= AUDIO_EDIT_LFO_PERIOD
;
511 * -----------------------------------------------------------------------------
513 static int audio_channel_load_source( audio_channel
*ch
)
515 if( ch
->source
->flags
& AUDIO_FLAG_VORBIS
)
517 /* Setup vorbis decoder */
518 u32 index
= ch
- vg_audio
.channels
;
520 u8
*buf
= (u8
*)vg_audio
.decode_buffer
,
521 *loc
= &buf
[AUDIO_DECODE_SIZE
*index
];
523 stb_vorbis_alloc alloc
= {
524 .alloc_buffer
= (char *)loc
,
525 .alloc_buffer_length_in_bytes
= AUDIO_DECODE_SIZE
529 stb_vorbis
*decoder
= stb_vorbis_open_memory(
531 ch
->source
->size
, &err
, &alloc
);
535 vg_error( "stb_vorbis_open_memory failed on '%s' (%d)\n",
536 ch
->source
->path
, err
);
541 ch
->source_length
= stb_vorbis_stream_length_in_samples( decoder
);
542 ch
->vorbis_handle
= decoder
;
545 else if( ch
->source
->flags
& AUDIO_FLAG_STEREO
)
547 ch
->source_length
= ch
->source
->size
/ 2;
551 ch
->source_length
= ch
->source
->size
;
557 VG_STATIC
void audio_decode_uncompressed_mono( i16
*src
, u32 count
, float *dst
)
559 for( u32 i
=0; i
<count
; i
++ )
561 dst
[ i
*2 + 0 ] = ((float)src
[i
]) * (1.0f
/32767.0f
);
562 dst
[ i
*2 + 1 ] = ((float)src
[i
]) * (1.0f
/32767.0f
);
567 * adapted from stb_vorbis.h, since the original does not handle mono->stereo
570 stb_vorbis_get_samples_float_interleaved_stereo( stb_vorbis
*f
, float *buffer
,
574 c
= VG_MIN( 1, f
->channels
- 1 );
578 int k
= f
->channel_buffer_end
- f
->channel_buffer_start
;
583 for( int j
=0; j
< k
; ++j
)
585 *buffer
++ = f
->channel_buffers
[ 0 ][f
->channel_buffer_start
+j
];
586 *buffer
++ = f
->channel_buffers
[ c
][f
->channel_buffer_start
+j
];
590 f
->channel_buffer_start
+= k
;
595 if( !stb_vorbis_get_frame_float( f
, NULL
, NULL
))
603 * ........ more wrecked code sorry!
606 stb_vorbis_get_samples_i16_downmixed( stb_vorbis
*f
, i16
*buffer
, int len
)
609 c
= VG_MIN( 1, f
->channels
- 1 );
613 int k
= f
->channel_buffer_end
- f
->channel_buffer_start
;
618 for( int j
=0; j
< k
; ++j
)
620 float sl
= f
->channel_buffers
[ 0 ][f
->channel_buffer_start
+j
],
621 sr
= f
->channel_buffers
[ c
][f
->channel_buffer_start
+j
];
623 *buffer
++ = vg_clampf( 0.5f
*(sl
+sr
), -1.0f
, 1.0f
) * 32767.0f
;
624 //*buffer++ = vg_clampf( sr, -1.0f, 1.0f ) * 32767.0f;
628 f
->channel_buffer_start
+= k
;
633 if( !stb_vorbis_get_frame_float( f
, NULL
, NULL
))
640 static inline float audio_lfo_pull_sample( audio_lfo
*lfo
)
644 if( lfo
->time
>= lfo
->_
.period
)
648 t
/= (float)lfo
->_
.period
;
650 if( lfo
->_
.wave_type
== k_lfo_polynomial_bipolar
)
667 return (( 2.0f
* lfo
->sqrt_polynomial_coefficient
* t
) /
668 /* --------------------------------------- */
669 ( 1.0f
+ lfo
->_
.polynomial_coefficient
* t
*t
)
679 static void audio_channel_get_samples( audio_channel
*ch
,
680 u32 count
, float *buf
)
682 vg_profile_begin( &_vg_prof_audio_decode
);
684 u32 remaining
= count
;
689 u32 samples_this_run
= VG_MIN( remaining
, ch
->source_length
-ch
->cursor
);
690 remaining
-= samples_this_run
;
692 float *dst
= &buf
[ buffer_pos
* 2 ];
694 if( ch
->source
->flags
& AUDIO_FLAG_STEREO
)
696 for( int i
=0;i
<samples_this_run
; i
++ )
702 else if( ch
->source
->flags
& AUDIO_FLAG_VORBIS
)
704 int read_samples
= stb_vorbis_get_samples_float_interleaved_stereo(
709 if( read_samples
!= samples_this_run
)
711 vg_warn( "Invalid samples read (%s)\n", ch
->source
->path
);
713 for( int i
=0; i
<samples_this_run
; i
++ )
722 i16
*src_buffer
= ch
->source
->data
,
723 *src
= &src_buffer
[ch
->cursor
];
725 audio_decode_uncompressed_mono( src
, samples_this_run
, dst
);
728 ch
->cursor
+= samples_this_run
;
729 buffer_pos
+= samples_this_run
;
731 if( (ch
->flags
& AUDIO_FLAG_LOOP
) && remaining
)
733 if( ch
->source
->flags
& AUDIO_FLAG_VORBIS
)
734 stb_vorbis_seek_start( ch
->vorbis_handle
);
745 buf
[ buffer_pos
*2 + 0 ] = 0.0f
;
746 buf
[ buffer_pos
*2 + 1 ] = 0.0f
;
752 vg_profile_end( &_vg_prof_audio_decode
);
755 static void audio_channel_mix( audio_channel
*ch
, float *buffer
)
757 u32 buffer_length
= AUDIO_MIX_FRAME_SIZE
;
758 if( ch
->_
.sampling_rate
!= 1.0f
)
760 float l
= ceilf( (float)(AUDIO_MIX_FRAME_SIZE
) * ch
->_
.sampling_rate
);
764 float pcf
[ AUDIO_MIX_FRAME_SIZE
* 2 * 2 ];
766 audio_channel_get_samples( ch
, buffer_length
, pcf
);
768 float framevol_l
= 1.0f
,
771 if( ch
->flags
& AUDIO_FLAG_SPACIAL_3D
)
773 if( !vg_validf(vg_audio
.listener_pos
[0]) ||
774 !vg_validf(vg_audio
.listener_pos
[1]) ||
775 !vg_validf(vg_audio
.listener_pos
[2]) ||
776 !vg_validf(ch
->_
.spacial_falloff
[0]) ||
777 !vg_validf(ch
->_
.spacial_falloff
[1]) ||
778 !vg_validf(ch
->_
.spacial_falloff
[2]) )
780 vg_error( "NaN listener/world position (%s)\n", ch
->name
);
787 v3_sub( ch
->_
.spacial_falloff
, vg_audio
.listener_pos
, delta
);
789 float dist
= v3_length( delta
),
790 vol
= vg_maxf( 0.0f
, 1.0f
- ch
->_
.spacial_falloff
[3]*dist
);
792 v3_muls( delta
, 1.0f
/dist
, delta
);
793 float pan
= v3_dot( vg_audio
.listener_ears
, delta
);
794 vol
= powf( vol
, 5.0f
);
796 framevol_l
*= (vol
* 0.5f
) * (1.0f
- pan
);
797 framevol_r
*= (vol
* 0.5f
) * (1.0f
+ pan
);
800 vg_profile_begin( &_vg_prof_audio_mix
);
802 float volume_movement
= ch
->volume_movement
;
803 float const fvolume_rate
= vg_maxf( 1.0f
, ch
->_
.volume_rate
);
804 const float inv_volume_rate
= 1.0f
/fvolume_rate
;
806 float volume
= ch
->_
.volume
;
807 const float volume_start
= ch
->volume_movement_start
;
808 const float volume_target
= ch
->_
.volume_target
;
810 for( u32 j
=0; j
<AUDIO_MIX_FRAME_SIZE
; j
++ )
813 * there is some REALLY weird behaviour with minss,
814 * i cannot begin to guess what the cause is, but the bahaviour when
815 * the second argument is not 1.0 would seemingly tripple or up to
816 * eight times this routine.
818 * the times it would happen are when moving from empty space into areas
819 * with geometry. in the bvh for skate rift.
821 * it should be completely unrelated to this, but somehow -- it is
822 * effecting the speed of minss. and severely at that too.
825 volume_movement
+= 1.0f
;
826 float movement_t
= volume_movement
* inv_volume_rate
;
827 movement_t
= vg_minf( volume_movement
, 1.0f
);
828 volume
= vg_lerpf( volume_start
, volume_target
, movement_t
);
830 float vol_norm
= volume
* volume
;
833 vol_norm
*= 1.0f
+ audio_lfo_pull_sample(ch
->_
.lfo
) * ch
->_
.lfo_amount
;
835 float vol_l
= vol_norm
* framevol_l
,
836 vol_r
= vol_norm
* framevol_r
,
840 if( ch
->_
.sampling_rate
!= 1.0f
)
842 /* absolutely garbage resampling, but it will do
845 float sample_index
= ch
->_
.sampling_rate
* (float)j
;
846 float t
= vg_fractf( sample_index
);
848 u32 i0
= floorf( sample_index
),
851 sample_l
= pcf
[ i0
*2+0 ]*(1.0f
-t
) + pcf
[ i1
*2+0 ]*t
;
852 sample_r
= pcf
[ i0
*2+1 ]*(1.0f
-t
) + pcf
[ i1
*2+1 ]*t
;
856 sample_l
= pcf
[ j
*2+0 ];
857 sample_r
= pcf
[ j
*2+1 ];
860 buffer
[ j
*2+0 ] += sample_l
* vol_l
;
861 buffer
[ j
*2+1 ] += sample_r
* vol_r
;
864 ch
->volume_movement
+= AUDIO_MIX_FRAME_SIZE
;
865 ch
->volume_movement
= VG_MIN( ch
->volume_movement
, ch
->_
.volume_rate
);
866 ch
->_
.volume
= volume
;
868 vg_profile_end( &_vg_prof_audio_mix
);
871 VG_STATIC
void audio_mixer_callback( void *user
, u8
*stream
, int byte_count
)
874 * Copy data and move edit flags to commit flags
875 * ------------------------------------------------------------- */
877 for( int i
=0; i
<AUDIO_CHANNELS
; i
++ )
879 audio_channel
*ch
= &vg_audio
.channels
[i
];
884 if( ch
->activity
== k_channel_activity_alive
)
886 if( (ch
->cursor
>= ch
->source_length
) &&
887 !(ch
->flags
& AUDIO_FLAG_LOOP
) )
889 ch
->activity
= k_channel_activity_end
;
893 /* process relinquishments */
894 if( (ch
->activity
!= k_channel_activity_reset
) && ch
->_
.relinquished
)
896 if( (ch
->activity
== k_channel_activity_end
)
897 || (ch
->_
.volume
== 0.0f
)
898 || (ch
->activity
== k_channel_activity_error
) )
900 ch
->_
.relinquished
= 0;
902 ch
->activity
= k_channel_activity_reset
;
907 /* process new channels */
908 if( ch
->activity
== k_channel_activity_reset
)
910 ch
->_
= ch
->editable_state
;
912 ch
->source_length
= 0;
913 ch
->activity
= k_channel_activity_wake
;
916 if( ch
->editble_state_write_mask
& AUDIO_EDIT_OWNERSHIP
)
917 ch
->_
.relinquished
= ch
->editable_state
.relinquished
;
919 ch
->editable_state
.relinquished
= ch
->_
.relinquished
;
922 if( ch
->editble_state_write_mask
& AUDIO_EDIT_VOLUME
)
923 ch
->_
.volume
= ch
->editable_state
.volume
;
925 ch
->editable_state
.volume
= ch
->_
.volume
;
928 if( ch
->editble_state_write_mask
& AUDIO_EDIT_VOLUME_SLOPE
)
930 ch
->volume_movement_start
= ch
->_
.volume
;
931 ch
->volume_movement
= 0;
933 ch
->_
.volume_target
= ch
->editable_state
.volume_target
;
934 ch
->_
.volume_rate
= ch
->editable_state
.volume_rate
;
938 ch
->editable_state
.volume_target
= ch
->_
.volume_target
;
939 ch
->editable_state
.volume_rate
= ch
->_
.volume_rate
;
943 if( ch
->editble_state_write_mask
& AUDIO_EDIT_SAMPLING_RATE
)
944 ch
->_
.sampling_rate
= ch
->editable_state
.sampling_rate
;
946 ch
->editable_state
.sampling_rate
= ch
->_
.sampling_rate
;
949 if( ch
->editble_state_write_mask
& AUDIO_EDIT_LFO_ATTACHMENT
)
951 ch
->_
.lfo
= ch
->editable_state
.lfo
;
952 ch
->_
.lfo_amount
= ch
->editable_state
.lfo_amount
;
956 ch
->editable_state
.lfo
= ch
->_
.lfo
;
957 ch
->editable_state
.lfo_amount
= ch
->_
.lfo_amount
;
961 if( ch
->editble_state_write_mask
& AUDIO_EDIT_SPACIAL
)
962 v4_copy( ch
->editable_state
.spacial_falloff
,ch
->_
.spacial_falloff
);
964 v4_copy( ch
->_
.spacial_falloff
,ch
->editable_state
.spacial_falloff
);
967 /* currently readonly, i guess */
968 ch
->editable_state
.pan_target
= ch
->_
.pan_target
;
969 ch
->editable_state
.pan
= ch
->_
.pan
;
970 ch
->editble_state_write_mask
= 0x00;
973 for( int i
=0; i
<AUDIO_LFOS
; i
++ )
975 audio_lfo
*lfo
= &vg_audio
.oscillators
[ i
];
977 if( lfo
->editble_state_write_mask
& AUDIO_EDIT_LFO_WAVE
)
979 lfo
->_
.wave_type
= lfo
->editable_state
.wave_type
;
981 if( lfo
->_
.wave_type
== k_lfo_polynomial_bipolar
)
983 lfo
->_
.polynomial_coefficient
=
984 lfo
->editable_state
.polynomial_coefficient
;
985 lfo
->sqrt_polynomial_coefficient
=
986 sqrtf(lfo
->_
.polynomial_coefficient
);
990 if( lfo
->editble_state_write_mask
& AUDIO_EDIT_LFO_PERIOD
)
995 t
/= (float)lfo
->_
.period
;
997 lfo
->_
.period
= lfo
->editable_state
.period
;
998 lfo
->time
= lfo
->_
.period
* t
;
1003 lfo
->_
.period
= lfo
->editable_state
.period
;
1007 lfo
->editble_state_write_mask
= 0x00;
1010 dsp_update_tunings();
1015 * ------------------------------------------------------------- */
1016 for( int i
=0; i
<AUDIO_CHANNELS
; i
++ )
1018 audio_channel
*ch
= &vg_audio
.channels
[i
];
1020 if( ch
->activity
== k_channel_activity_wake
)
1022 if( audio_channel_load_source( ch
) )
1023 ch
->activity
= k_channel_activity_alive
;
1025 ch
->activity
= k_channel_activity_error
;
1031 * -------------------------------------------------------- */
1032 int frame_count
= byte_count
/(2*sizeof(float));
1035 float *pOut32F
= (float *)stream
;
1036 for( int i
=0; i
<frame_count
*2; i
++ )
1039 for( int i
=0; i
<AUDIO_LFOS
; i
++ )
1041 audio_lfo
*lfo
= &vg_audio
.oscillators
[i
];
1042 lfo
->time_startframe
= lfo
->time
;
1045 for( int i
=0; i
<AUDIO_CHANNELS
; i
++ )
1047 audio_channel
*ch
= &vg_audio
.channels
[i
];
1049 if( ch
->activity
== k_channel_activity_alive
)
1052 ch
->_
.lfo
->time
= ch
->_
.lfo
->time_startframe
;
1054 u32 remaining
= frame_count
,
1059 audio_channel_mix( ch
, pOut32F
+subpos
);
1060 remaining
-= AUDIO_MIX_FRAME_SIZE
;
1061 subpos
+= AUDIO_MIX_FRAME_SIZE
*2;
1066 vg_profile_begin( &_vg_prof_dsp
);
1068 for( int i
=0; i
<frame_count
; i
++ )
1069 vg_dsp_process( pOut32F
+ i
*2, pOut32F
+ i
*2 );
1071 vg_profile_end( &_vg_prof_dsp
);
1075 for( int i
=0; i
<AUDIO_CHANNELS
; i
++ )
1077 audio_channel
*ch
= &vg_audio
.channels
[i
];
1078 ch
->readable_activity
= ch
->activity
;
1081 /* Profiling information
1082 * ----------------------------------------------- */
1083 vg_profile_increment( &_vg_prof_audio_decode
);
1084 vg_profile_increment( &_vg_prof_audio_mix
);
1085 vg_profile_increment( &_vg_prof_dsp
);
1087 vg_prof_audio_mix
= _vg_prof_audio_mix
;
1088 vg_prof_audio_decode
= _vg_prof_audio_decode
;
1089 vg_prof_audio_dsp
= _vg_prof_dsp
;
1091 vg_audio
.samples_last
= frame_count
;
1093 if( vg_audio
.debug_ui
)
1095 vg_dsp_update_texture();
1101 VG_STATIC
void audio_clip_load( audio_clip
*clip
, void *lin_alloc
)
1103 if( lin_alloc
== NULL
)
1104 lin_alloc
= vg_audio
.audio_pool
;
1107 /* load in directly */
1108 if( clip
->flags
& AUDIO_FLAG_VORBIS
)
1111 clip
->data
= vg_file_read( lin_alloc
, clip
->path
, &clip
->size
);
1115 vg_fatal_exit_loop( "Audio failed to load" );
1117 float mb
= (float)(clip
->size
) / (1024.0f
*1024.0f
);
1118 vg_info( "Loaded audio clip '%s' (%.1fmb)\n", clip
->path
, mb
);
1120 else if( clip
->flags
& AUDIO_FLAG_STEREO
)
1122 vg_fatal_exit_loop( "Unsupported format (Stereo uncompressed)" );
1126 vg_linear_clear( vg_mem
.scratch
);
1129 stb_vorbis_alloc alloc
= {
1130 .alloc_buffer
= vg_linear_alloc( vg_mem
.scratch
, AUDIO_DECODE_SIZE
),
1131 .alloc_buffer_length_in_bytes
= AUDIO_DECODE_SIZE
1134 void *filedata
= vg_file_read( vg_mem
.scratch
, clip
->path
, &fsize
);
1137 stb_vorbis
*decoder
= stb_vorbis_open_memory(
1138 filedata
, fsize
, &err
, &alloc
);
1142 vg_error( "stb_vorbis_open_memory failed on '%s' (%d)\n",
1144 vg_fatal_exit_loop( "Vorbis decode error" );
1147 /* only mono is supported in uncompressed */
1148 u32 length_samples
= stb_vorbis_stream_length_in_samples( decoder
),
1149 data_size
= length_samples
* sizeof(i16
);
1152 clip
->data
= vg_linear_alloc( lin_alloc
, vg_align8(data_size
) );
1153 clip
->size
= length_samples
;
1156 int read_samples
= stb_vorbis_get_samples_i16_downmixed(
1157 decoder
, clip
->data
, length_samples
);
1159 if( read_samples
!= length_samples
)
1160 vg_fatal_exit_loop( "Decode error" );
1162 float mb
= (float)(data_size
) / (1024.0f
*1024.0f
);
1163 vg_info( "Loaded audio clip '%s' (%.1fmb) %u samples\n", clip
->path
, mb
,
1168 VG_STATIC
void audio_clip_loadn( audio_clip
*arr
, int count
, void *lin_alloc
)
1170 for( int i
=0; i
<count
; i
++ )
1171 audio_clip_load( &arr
[i
], lin_alloc
);
1174 VG_STATIC
void audio_require_clip_loaded( audio_clip
*clip
)
1176 if( clip
->data
&& clip
->size
)
1180 vg_fatal_exit_loop( "Must load audio clip before playing! \n" );
1187 VG_STATIC
void audio_debug_ui( m4x4f mtx_pv
)
1189 if( !vg_audio
.debug_ui
)
1194 glBindTexture( GL_TEXTURE_2D
, vg_dsp
.view_texture
);
1195 glTexSubImage2D( GL_TEXTURE_2D
, 0, 0, 0, 256, 256,
1196 GL_RGBA
, GL_UNSIGNED_BYTE
,
1197 vg_dsp
.view_texture_buffer
);
1201 * -----------------------------------------------------------------------
1204 float budget
= ((double)vg_audio
.samples_last
/ 44100.0) * 1000.0;
1205 vg_profile_drawn( (struct vg_profile
*[]){ &vg_prof_audio_decode
,
1207 &vg_prof_audio_dsp
}, 3,
1208 budget
, (ui_rect
){ 4, VG_PROFILE_SAMPLE_COUNT
*2 + 8,
1215 vg_uictx
.cursor
[0] = 512 + 8;
1216 vg_uictx
.cursor
[1] = VG_PROFILE_SAMPLE_COUNT
*2+8+24+12+12;
1217 vg_uictx
.cursor
[2] = 150;
1218 vg_uictx
.cursor
[3] = 12;
1220 ui_rect view_thing
= { 4, vg
.window_y
-512-4, 512, 512 };
1221 ui_push_image( view_thing
, vg_dsp
.view_texture
);
1223 float mb1
= 1024.0f
*1024.0f
,
1224 usage
= vg_linear_get_cur( vg_audio
.audio_pool
) / mb1
,
1225 total
= vg_linear_get_capacity( vg_audio
.audio_pool
) / mb1
,
1226 percent
= (usage
/total
) * 100.0f
;
1228 snprintf( perf
, 127, "Mem: %.1f/%.1fmb (%.1f%%)\n", usage
, total
, percent
);
1230 ui_text( vg_uictx
.cursor
, perf
, 1, 0 );
1231 vg_uictx
.cursor
[1] += 20;
1233 ui_rect overlap_buffer
[ AUDIO_CHANNELS
];
1234 u32 overlap_length
= 0;
1236 /* Draw audio stack */
1237 for( int i
=0; i
<AUDIO_CHANNELS
; i
++ )
1239 audio_channel
*ch
= &vg_audio
.channels
[i
];
1241 vg_uictx
.cursor
[2] = 400;
1242 vg_uictx
.cursor
[3] = 18;
1246 if( !ch
->allocated
)
1248 ui_fill_rect( vg_uictx
.cursor
, 0x50333333 );
1251 vg_uictx
.cursor
[1] += 1;
1255 const char *formats
[] =
1263 const char *activties
[] =
1272 int format_index
= 0;
1274 if( ch
->source
->flags
& AUDIO_FLAG_STEREO
)
1276 else if( ch
->source
->flags
& AUDIO_FLAG_VORBIS
)
1281 snprintf( perf
, 127, "%02d %c%c%cD %s [%s] %4.2fv'%s'",
1283 (ch
->editable_state
.relinquished
)? 'r': '_',
1286 formats
[format_index
],
1287 activties
[ch
->readable_activity
],
1288 ch
->editable_state
.volume
,
1291 if( format_index
== 0 )
1293 ui_fill_rect( vg_uictx
.cursor
, 0xa00000ff );
1297 ui_fill_rect( vg_uictx
.cursor
, 0xa0000000 | ch
->colour
);
1300 vg_uictx
.cursor
[0] += 2;
1301 vg_uictx
.cursor
[1] += 2;
1302 ui_text( vg_uictx
.cursor
, perf
, 1, 0 );
1305 vg_uictx
.cursor
[1] += 1;
1307 if( AUDIO_FLAG_SPACIAL_3D
)
1310 v3_copy( ch
->editable_state
.spacial_falloff
, wpos
);
1313 m4x4_mulv( mtx_pv
, wpos
, wpos
);
1315 if( wpos
[3] > 0.0f
)
1317 v2_muls( wpos
, (1.0f
/wpos
[3]) * 0.5f
, wpos
);
1318 v2_add( wpos
, (v2f
){ 0.5f
, 0.5f
}, wpos
);
1321 wr
[0] = wpos
[0] * vg
.window_x
;
1322 wr
[1] = (1.0f
-wpos
[1]) * vg
.window_y
;
1326 for( int j
=0; j
<12; j
++ )
1329 for( int k
=0; k
<overlap_length
; k
++ )
1331 ui_px
*wk
= overlap_buffer
[k
];
1332 if( ((wr
[0] <= wk
[0]+wk
[2]) && (wr
[0]+wr
[2] >= wk
[0])) &&
1333 ((wr
[1] <= wk
[1]+wk
[3]) && (wr
[1]+wr
[3] >= wk
[1])) )
1346 ui_text( wr
, perf
, 1, 0 );
1348 ui_rect_copy( wr
, overlap_buffer
[ overlap_length
++ ] );
1356 #endif /* VG_AUDIO_H */