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"
17 #include "vg/vg_audio_synth_bird.h"
24 #pragma GCC push_options
25 #pragma GCC optimize ("O3")
26 #pragma GCC diagnostic push
27 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
31 #define STB_VORBIS_MAX_CHANNELS 2
32 #include "submodules/stb/stb_vorbis.c"
39 #pragma GCC pop_options
40 #pragma GCC diagnostic pop
44 #define AUDIO_FRAME_SIZE 512
45 #define AUDIO_MIX_FRAME_SIZE 256
47 #define AUDIO_CHANNELS 32
49 #define AUDIO_FILTERS 16
50 #define AUDIO_FLAG_LOOP 0x1
51 #define AUDIO_FLAG_NO_DOPPLER 0x2
52 #define AUDIO_FLAG_SPACIAL_3D 0x4
53 #define AUDIO_FLAG_AUTO_START 0x8
55 /* Vorbis will ALWAYS use the maximum amount of channels it can */
56 //#define AUDIO_FLAG_MONO 0x100 NOTE: This is the default, so its not used
57 //#define AUDIO_FLAG_STEREO 0x200
58 //#define AUDIO_FLAG_VORBIS 0x400
59 //#define AUDIO_FLAG_BIRD_SYNTH 0x800
61 #define AUDIO_FLAG_FORMAT 0x1E00
65 k_audio_format_mono
= 0x000u
,
66 k_audio_format_stereo
= 0x200u
,
67 k_audio_format_vorbis
= 0x400u
,
68 k_audio_format_none0
= 0x600u
,
69 k_audio_format_none1
= 0x800u
,
70 k_audio_format_none2
= 0xA00u
,
71 k_audio_format_none3
= 0xC00u
,
72 k_audio_format_none4
= 0xE00u
,
74 k_audio_format_bird
= 0x1000u
,
75 k_audio_format_none5
= 0x1200u
,
76 k_audio_format_none6
= 0x1400u
,
77 k_audio_format_none7
= 0x1600u
,
78 k_audio_format_none8
= 0x1800u
,
79 k_audio_format_none9
= 0x1A00u
,
80 k_audio_format_none10
= 0x1C00u
,
81 k_audio_format_none11
= 0x1E00u
,
84 #define AUDIO_DECODE_SIZE (1024*256) /* 256 kb decoding buffers */
85 #define AUDIO_MUTE_VOLUME 0.0f
86 #define AUDIO_BASE_VOLUME 1.0f
88 typedef struct audio_clip audio_clip
;
89 typedef struct audio_channel audio_channel
;
90 typedef struct audio_lfo audio_lfo
;
99 static struct vg_audio_system
{
100 SDL_AudioDeviceID sdl_output_device
;
109 SDL_SpinLock sl_checker
,
113 u32 time
, time_startframe
;
114 float sqrt_polynomial_coefficient
;
121 k_lfo_polynomial_bipolar
126 float polynomial_coefficient
;
129 u32 editble_state_write_mask
;
131 oscillators
[ AUDIO_LFOS
];
133 struct audio_channel
{
137 char name
[32]; /* only editable while allocated == 0 */
138 audio_clip
*source
; /* ... */
140 u32 colour
; /* ... */
142 /* internal non-readable state
143 * -----------------------------*/
144 u32 cursor
, source_length
;
146 float volume_movement_start
,
153 struct synth_bird
*bird_handle
;
154 stb_vorbis
*vorbis_handle
;
157 stb_vorbis_alloc vorbis_alloc
;
159 enum channel_activity
{
160 k_channel_activity_reset
, /* will advance if allocated==1, to wake */
161 k_channel_activity_wake
, /* will advance to either of next two */
162 k_channel_activity_alive
,
163 k_channel_activity_end
,
164 k_channel_activity_error
170 * editable structure, can be modified inside _lock and _unlock
171 * the edit mask tells which to copy into internal _, or to discard
172 * ----------------------------------------------------------------------
174 struct channel_state
{
177 float volume
, /* current volume */
178 volume_target
, /* target volume */
186 v4f spacial_falloff
; /* xyz, range */
192 u32 editble_state_write_mask
;
194 channels
[ AUDIO_CHANNELS
];
196 int debug_ui
, debug_ui_3d
;
198 v3f internal_listener_pos
,
199 internal_listener_ears
,
200 internal_listener_velocity
,
202 external_listener_pos
,
203 external_listener_ears
,
204 external_lister_velocity
;
206 float internal_global_volume
,
207 external_global_volume
;
209 vg_audio
= { .external_global_volume
= 1.0f
};
211 #include "vg/vg_audio_dsp.h"
213 static struct vg_profile
214 _vg_prof_audio_decode
= {.mode
= k_profile_mode_accum
,
215 .name
= "[T2] audio_decode()"},
216 _vg_prof_audio_mix
= {.mode
= k_profile_mode_accum
,
217 .name
= "[T2] audio_mix()"},
218 _vg_prof_dsp
= {.mode
= k_profile_mode_accum
,
219 .name
= "[T2] dsp_process()"},
220 vg_prof_audio_decode
,
225 * These functions are called from the main thread and used to prevent bad
226 * access. TODO: They should be no-ops in release builds.
228 VG_STATIC
int audio_lock_checker_load(void)
231 SDL_AtomicLock( &vg_audio
.sl_checker
);
232 value
= vg_audio
.sync_locked
;
233 SDL_AtomicUnlock( &vg_audio
.sl_checker
);
237 VG_STATIC
void audio_lock_checker_store( int value
)
239 SDL_AtomicLock( &vg_audio
.sl_checker
);
240 vg_audio
.sync_locked
= value
;
241 SDL_AtomicUnlock( &vg_audio
.sl_checker
);
244 VG_STATIC
void audio_require_lock(void)
246 if( audio_lock_checker_load() )
249 vg_error( "Modifying sound effects systems requires locking\n" );
253 VG_STATIC
void audio_lock(void)
255 SDL_AtomicLock( &vg_audio
.sl_sync
);
256 audio_lock_checker_store(1);
259 VG_STATIC
void audio_unlock(void)
261 audio_lock_checker_store(0);
262 SDL_AtomicUnlock( &vg_audio
.sl_sync
);
265 VG_STATIC
void audio_mixer_callback( void *user
, u8
*stream
, int frame_count
);
266 VG_STATIC
void vg_audio_init(void)
268 /* TODO: Move here? */
269 vg_var_push( (struct vg_var
){
270 .name
= "debug_audio",
271 .data
= &vg_audio
.debug_ui
,
272 .data_type
= k_var_dtype_i32
,
273 .opt_i32
= { .min
=0, .max
=1, .clamp
=1 },
277 vg_var_push( (struct vg_var
){
279 .data
= &vg_audio
.external_global_volume
,
280 .data_type
= k_var_dtype_f32
,
281 .opt_f32
= { .min
=0.0f
, .max
=2.0f
, .clamp
=1 },
285 /* allocate memory */
288 vg_audio
.audio_pool
=
289 vg_create_linear_allocator( vg_mem
.rtmemory
, 1024*1024*32,
293 u32 decode_size
= AUDIO_DECODE_SIZE
* AUDIO_CHANNELS
;
294 vg_audio
.decode_buffer
= vg_linear_alloc( vg_mem
.rtmemory
, decode_size
);
298 SDL_AudioSpec spec_desired
, spec_got
;
299 spec_desired
.callback
= audio_mixer_callback
;
300 spec_desired
.channels
= 2;
301 spec_desired
.format
= AUDIO_F32
;
302 spec_desired
.freq
= 44100;
303 spec_desired
.padding
= 0;
304 spec_desired
.samples
= AUDIO_FRAME_SIZE
;
305 spec_desired
.silence
= 0;
306 spec_desired
.size
= 0;
307 spec_desired
.userdata
= NULL
;
309 vg_audio
.sdl_output_device
=
310 SDL_OpenAudioDevice( NULL
, 0, &spec_desired
, &spec_got
,0 );
312 if( vg_audio
.sdl_output_device
){
313 SDL_PauseAudioDevice( vg_audio
.sdl_output_device
, 0 );
317 "SDL_OpenAudioDevice failed. Your default audio device must support:\n"
318 " Frequency: 44100 hz\n"
319 " Buffer size: 512\n"
321 " Format: s16 or f32\n" );
324 vg_success( "Ready\n" );
327 VG_STATIC
void vg_audio_free(void)
330 SDL_CloseAudioDevice( vg_audio
.sdl_output_device
);
337 #define AUDIO_EDIT_VOLUME_SLOPE 0x1
338 #define AUDIO_EDIT_VOLUME 0x2
339 #define AUDIO_EDIT_LFO_PERIOD 0x4
340 #define AUDIO_EDIT_LFO_WAVE 0x8
341 #define AUDIO_EDIT_LFO_ATTACHMENT 0x10
342 #define AUDIO_EDIT_SPACIAL 0x20
343 #define AUDIO_EDIT_OWNERSHIP 0x40
344 #define AUDIO_EDIT_SAMPLING_RATE 0x80
346 static void audio_channel_init( audio_channel
*ch
, audio_clip
*clip
, u32 flags
)
351 ch
->colour
= 0x00333333;
353 if( (ch
->source
->flags
& AUDIO_FLAG_FORMAT
) == k_audio_format_bird
)
354 strcpy( ch
->name
, "[array]" );
356 strncpy( ch
->name
, clip
->path
, 31 );
360 ch
->editable_state
.relinquished
= 0;
361 ch
->editable_state
.volume
= 1.0f
;
362 ch
->editable_state
.volume_target
= 1.0f
;
363 ch
->editable_state
.pan
= 0.0f
;
364 ch
->editable_state
.pan_target
= 0.0f
;
365 ch
->editable_state
.volume_rate
= 0;
366 ch
->editable_state
.pan_rate
= 0;
367 v4_copy((v4f
){0.0f
,0.0f
,0.0f
,1.0f
},ch
->editable_state
.spacial_falloff
);
368 ch
->editable_state
.lfo
= NULL
;
369 ch
->editable_state
.lfo_amount
= 0.0f
;
370 ch
->editable_state
.sampling_rate
= 1.0f
;
371 ch
->editble_state_write_mask
= 0x00;
374 static void audio_channel_group( audio_channel
*ch
, u32 group
)
377 ch
->colour
= ((group
* 29986577) & 0x00ffffff) | 0xff000000;
380 static audio_channel
*audio_get_first_idle_channel(void)
382 for( int i
=0; i
<AUDIO_CHANNELS
; i
++ ){
383 audio_channel
*ch
= &vg_audio
.channels
[i
];
385 if( !ch
->allocated
){
393 static audio_channel
*audio_get_group_idle_channel( u32 group
, u32 max_count
)
396 audio_channel
*dest
= NULL
;
398 for( int i
=0; i
<AUDIO_CHANNELS
; i
++ ){
399 audio_channel
*ch
= &vg_audio
.channels
[i
];
402 if( ch
->group
== group
){
412 if( dest
&& (count
< max_count
) ){
419 static audio_channel
*audio_get_group_first_active_channel( u32 group
)
421 for( int i
=0; i
<AUDIO_CHANNELS
; i
++ ){
422 audio_channel
*ch
= &vg_audio
.channels
[i
];
423 if( ch
->allocated
&& (ch
->group
== group
) )
429 static int audio_channel_finished( audio_channel
*ch
)
431 if( ch
->readable_activity
== k_channel_activity_end
)
437 static audio_channel
*audio_relinquish_channel( audio_channel
*ch
)
439 ch
->editable_state
.relinquished
= 1;
440 ch
->editble_state_write_mask
|= AUDIO_EDIT_OWNERSHIP
;
444 static void audio_channel_slope_volume( audio_channel
*ch
, float length
,
447 ch
->editable_state
.volume_target
= new_volume
;
448 ch
->editable_state
.volume_rate
= length
* 44100.0f
;
449 ch
->editble_state_write_mask
|= AUDIO_EDIT_VOLUME_SLOPE
;
452 static void audio_channel_set_sampling_rate( audio_channel
*ch
, float rate
)
454 ch
->editable_state
.sampling_rate
= rate
;
455 ch
->editble_state_write_mask
|= AUDIO_EDIT_SAMPLING_RATE
;
458 static void audio_channel_edit_volume( audio_channel
*ch
,
459 float new_volume
, int instant
)
462 ch
->editable_state
.volume
= new_volume
;
463 ch
->editble_state_write_mask
|= AUDIO_EDIT_VOLUME
;
466 audio_channel_slope_volume( ch
, 0.05f
, new_volume
);
470 static audio_channel
*audio_channel_fadeout( audio_channel
*ch
, float length
)
472 audio_channel_slope_volume( ch
, length
, 0.0f
);
473 return audio_relinquish_channel( ch
);
476 static void audio_channel_fadein( audio_channel
*ch
, float length
)
478 audio_channel_edit_volume( ch
, 0.0f
, 1 );
479 audio_channel_slope_volume( ch
, length
, 1.0f
);
482 static audio_channel
*audio_channel_crossfade( audio_channel
*ch
,
483 audio_clip
*new_clip
,
484 float length
, u32 flags
)
489 ch
= audio_channel_fadeout( ch
, length
);
491 audio_channel
*replacement
= audio_get_first_idle_channel();
494 audio_channel_init( replacement
, new_clip
, flags
);
495 audio_channel_fadein( replacement
, length
);
501 static void audio_channel_sidechain_lfo( audio_channel
*ch
, int lfo_id
,
504 ch
->editable_state
.lfo
= &vg_audio
.oscillators
[ lfo_id
];
505 ch
->editable_state
.lfo_amount
= amount
;
506 ch
->editble_state_write_mask
|= AUDIO_EDIT_LFO_ATTACHMENT
;
509 static void audio_channel_set_spacial( audio_channel
*ch
, v3f co
, float range
)
511 if( ch
->flags
& AUDIO_FLAG_SPACIAL_3D
){
512 v3_copy( co
, ch
->editable_state
.spacial_falloff
);
515 ch
->editable_state
.spacial_falloff
[3] = 1.0f
;
517 ch
->editable_state
.spacial_falloff
[3] = 1.0f
/range
;
519 ch
->editble_state_write_mask
|= AUDIO_EDIT_SPACIAL
;
522 vg_warn( "Tried to set spacialization paramaters for 2D channel (%s)\n",
527 static int audio_oneshot_3d( audio_clip
*clip
, v3f position
,
528 float range
, float volume
)
530 audio_channel
*ch
= audio_get_first_idle_channel();
533 audio_channel_init( ch
, clip
, AUDIO_FLAG_SPACIAL_3D
);
534 audio_channel_set_spacial( ch
, position
, range
);
535 audio_channel_edit_volume( ch
, volume
, 1 );
536 ch
= audio_relinquish_channel( ch
);
544 static int audio_oneshot( audio_clip
*clip
, float volume
, float pan
)
546 audio_channel
*ch
= audio_get_first_idle_channel();
549 audio_channel_init( ch
, clip
, 0x00 );
550 audio_channel_edit_volume( ch
, volume
, 1 );
551 ch
= audio_relinquish_channel( ch
);
559 static void audio_set_lfo_wave( int id
, enum lfo_wave_type type
,
562 audio_lfo
*lfo
= &vg_audio
.oscillators
[ id
];
563 lfo
->editable_state
.polynomial_coefficient
= coefficient
;
564 lfo
->editable_state
.wave_type
= type
;
566 lfo
->editble_state_write_mask
|= AUDIO_EDIT_LFO_WAVE
;
569 static void audio_set_lfo_frequency( int id
, float freq
)
571 audio_lfo
*lfo
= &vg_audio
.oscillators
[ id
];
572 lfo
->editable_state
.period
= 44100.0f
/ freq
;
573 lfo
->editble_state_write_mask
|= AUDIO_EDIT_LFO_PERIOD
;
579 * -----------------------------------------------------------------------------
581 static int audio_channel_load_source( audio_channel
*ch
)
583 u32 format
= ch
->source
->flags
& AUDIO_FLAG_FORMAT
;
585 if( format
== k_audio_format_vorbis
){
586 /* Setup vorbis decoder */
587 u32 index
= ch
- vg_audio
.channels
;
589 u8
*buf
= (u8
*)vg_audio
.decode_buffer
,
590 *loc
= &buf
[AUDIO_DECODE_SIZE
*index
];
592 stb_vorbis_alloc alloc
= {
593 .alloc_buffer
= (char *)loc
,
594 .alloc_buffer_length_in_bytes
= AUDIO_DECODE_SIZE
598 stb_vorbis
*decoder
= stb_vorbis_open_memory(
600 ch
->source
->size
, &err
, &alloc
);
603 vg_error( "stb_vorbis_open_memory failed on '%s' (%d)\n",
604 ch
->source
->path
, err
);
608 ch
->source_length
= stb_vorbis_stream_length_in_samples( decoder
);
609 ch
->vorbis_handle
= decoder
;
612 else if( format
== k_audio_format_bird
){
613 u32 index
= ch
- vg_audio
.channels
;
615 u8
*buf
= (u8
*)vg_audio
.decode_buffer
;
616 struct synth_bird
*loc
= (void *)&buf
[AUDIO_DECODE_SIZE
*index
];
618 memcpy( loc
, ch
->source
->data
, ch
->source
->size
);
619 synth_bird_reset( loc
);
621 ch
->bird_handle
= loc
;
622 ch
->source_length
= synth_bird_get_length_in_samples( loc
);
624 else if( format
== k_audio_format_stereo
){
625 ch
->source_length
= ch
->source
->size
/ 2;
628 ch
->source_length
= ch
->source
->size
;
634 VG_STATIC
void audio_decode_uncompressed_mono( i16
*src
, u32 count
, float *dst
)
636 for( u32 i
=0; i
<count
; i
++ ){
637 dst
[ i
*2 + 0 ] = ((float)src
[i
]) * (1.0f
/32767.0f
);
638 dst
[ i
*2 + 1 ] = ((float)src
[i
]) * (1.0f
/32767.0f
);
643 * adapted from stb_vorbis.h, since the original does not handle mono->stereo
646 stb_vorbis_get_samples_float_interleaved_stereo( stb_vorbis
*f
, float *buffer
,
650 c
= VG_MIN( 1, f
->channels
- 1 );
653 int k
= f
->channel_buffer_end
- f
->channel_buffer_start
;
658 for( int j
=0; j
< k
; ++j
) {
659 *buffer
++ = f
->channel_buffers
[ 0 ][f
->channel_buffer_start
+j
];
660 *buffer
++ = f
->channel_buffers
[ c
][f
->channel_buffer_start
+j
];
664 f
->channel_buffer_start
+= k
;
669 if( !stb_vorbis_get_frame_float( f
, NULL
, NULL
))
677 * ........ more wrecked code sorry!
680 stb_vorbis_get_samples_i16_downmixed( stb_vorbis
*f
, i16
*buffer
, int len
)
683 c
= VG_MIN( 1, f
->channels
- 1 );
686 int k
= f
->channel_buffer_end
- f
->channel_buffer_start
;
691 for( int j
=0; j
< k
; ++j
) {
692 float sl
= f
->channel_buffers
[ 0 ][f
->channel_buffer_start
+j
],
693 sr
= f
->channel_buffers
[ c
][f
->channel_buffer_start
+j
];
695 *buffer
++ = vg_clampf( 0.5f
*(sl
+sr
), -1.0f
, 1.0f
) * 32767.0f
;
696 //*buffer++ = vg_clampf( sr, -1.0f, 1.0f ) * 32767.0f;
700 f
->channel_buffer_start
+= k
;
705 if( !stb_vorbis_get_frame_float( f
, NULL
, NULL
))
712 static inline float audio_lfo_pull_sample( audio_lfo
*lfo
)
716 if( lfo
->time
>= lfo
->_
.period
)
720 t
/= (float)lfo
->_
.period
;
722 if( lfo
->_
.wave_type
== k_lfo_polynomial_bipolar
){
738 return (( 2.0f
* lfo
->sqrt_polynomial_coefficient
* t
) /
739 /* --------------------------------------- */
740 ( 1.0f
+ lfo
->_
.polynomial_coefficient
* t
*t
)
749 static void audio_channel_get_samples( audio_channel
*ch
,
750 u32 count
, float *buf
)
752 vg_profile_begin( &_vg_prof_audio_decode
);
754 u32 remaining
= count
;
757 u32 format
= ch
->source
->flags
& AUDIO_FLAG_FORMAT
;
760 u32 samples_this_run
= VG_MIN(remaining
, ch
->source_length
- ch
->cursor
);
761 remaining
-= samples_this_run
;
763 float *dst
= &buf
[ buffer_pos
* 2 ];
765 if( format
== k_audio_format_stereo
){
766 for( int i
=0;i
<samples_this_run
; i
++ ){
771 else if( format
== k_audio_format_vorbis
){
772 int read_samples
= stb_vorbis_get_samples_float_interleaved_stereo(
777 if( read_samples
!= samples_this_run
){
778 vg_warn( "Invalid samples read (%s)\n", ch
->source
->path
);
780 for( int i
=0; i
<samples_this_run
; i
++ ){
786 else if( format
== k_audio_format_bird
){
787 synth_bird_generate_samples( ch
->bird_handle
, dst
, samples_this_run
);
790 i16
*src_buffer
= ch
->source
->data
,
791 *src
= &src_buffer
[ch
->cursor
];
793 audio_decode_uncompressed_mono( src
, samples_this_run
, dst
);
796 ch
->cursor
+= samples_this_run
;
797 buffer_pos
+= samples_this_run
;
799 if( (ch
->flags
& AUDIO_FLAG_LOOP
) && remaining
){
800 if( format
== k_audio_format_vorbis
)
801 stb_vorbis_seek_start( ch
->vorbis_handle
);
802 else if( format
== k_audio_format_bird
)
803 synth_bird_reset( ch
->bird_handle
);
813 buf
[ buffer_pos
*2 + 0 ] = 0.0f
;
814 buf
[ buffer_pos
*2 + 1 ] = 0.0f
;
820 vg_profile_end( &_vg_prof_audio_decode
);
823 static void audio_channel_mix( audio_channel
*ch
, float *buffer
)
825 float framevol_l
= vg_audio
.internal_global_volume
,
826 framevol_r
= vg_audio
.internal_global_volume
;
828 float frame_samplerate
= ch
->_
.sampling_rate
;
830 if( ch
->flags
& AUDIO_FLAG_SPACIAL_3D
){
832 v3_sub( ch
->_
.spacial_falloff
, vg_audio
.internal_listener_pos
, delta
);
834 float dist
= v3_length( delta
),
835 vol
= vg_maxf( 0.0f
, 1.0f
- ch
->_
.spacial_falloff
[3]*dist
);
841 v3_muls( delta
, 1.0f
/dist
, delta
);
842 float pan
= v3_dot( vg_audio
.internal_listener_ears
, delta
);
843 vol
= powf( vol
, 5.0f
);
845 framevol_l
*= (vol
* 0.5f
) * (1.0f
- pan
);
846 framevol_r
*= (vol
* 0.5f
) * (1.0f
+ pan
);
848 if( !(ch
->source
->flags
& AUDIO_FLAG_NO_DOPPLER
) ){
849 const float vs
= 323.0f
;
851 float dv
= v3_dot(delta
,vg_audio
.internal_listener_velocity
);
852 float doppler
= (vs
+dv
)/vs
;
853 doppler
= vg_clampf( doppler
, 0.6f
, 1.4f
);
855 if( fabsf(doppler
-1.0f
) > 0.01f
)
856 frame_samplerate
*= doppler
;
860 if( !vg_validf( framevol_l
) ) vg_fatal_exit_loop( "NaN left channel" );
861 if( !vg_validf( framevol_r
) ) vg_fatal_exit_loop( "NaN right channel" );
862 if( !vg_validf( frame_samplerate
) )
863 vg_fatal_exit_loop( "NaN sample rate" );
866 u32 buffer_length
= AUDIO_MIX_FRAME_SIZE
;
867 if( frame_samplerate
!= 1.0f
){
868 float l
= ceilf( (float)(AUDIO_MIX_FRAME_SIZE
) * frame_samplerate
);
872 float pcf
[ AUDIO_MIX_FRAME_SIZE
* 2 * 2 ];
874 audio_channel_get_samples( ch
, buffer_length
, pcf
);
876 vg_profile_begin( &_vg_prof_audio_mix
);
878 float volume_movement
= ch
->volume_movement
;
879 float const fvolume_rate
= vg_maxf( 1.0f
, ch
->_
.volume_rate
);
880 const float inv_volume_rate
= 1.0f
/fvolume_rate
;
882 float volume
= ch
->_
.volume
;
883 const float volume_start
= ch
->volume_movement_start
;
884 const float volume_target
= ch
->_
.volume_target
;
886 for( u32 j
=0; j
<AUDIO_MIX_FRAME_SIZE
; j
++ ){
887 volume_movement
+= 1.0f
;
888 float movement_t
= volume_movement
* inv_volume_rate
;
889 movement_t
= vg_minf( movement_t
, 1.0f
);
890 volume
= vg_lerpf( volume_start
, volume_target
, movement_t
);
892 float vol_norm
= volume
* volume
;
895 vol_norm
*= 1.0f
+ audio_lfo_pull_sample(ch
->_
.lfo
) * ch
->_
.lfo_amount
;
897 float vol_l
= vol_norm
* framevol_l
,
898 vol_r
= vol_norm
* framevol_r
,
902 if( frame_samplerate
!= 1.0f
){
903 /* absolutely garbage resampling, but it will do
906 float sample_index
= frame_samplerate
* (float)j
;
907 float t
= vg_fractf( sample_index
);
909 u32 i0
= floorf( sample_index
),
912 sample_l
= pcf
[ i0
*2+0 ]*(1.0f
-t
) + pcf
[ i1
*2+0 ]*t
;
913 sample_r
= pcf
[ i0
*2+1 ]*(1.0f
-t
) + pcf
[ i1
*2+1 ]*t
;
916 sample_l
= pcf
[ j
*2+0 ];
917 sample_r
= pcf
[ j
*2+1 ];
920 buffer
[ j
*2+0 ] += sample_l
* vol_l
;
921 buffer
[ j
*2+1 ] += sample_r
* vol_r
;
924 ch
->volume_movement
+= AUDIO_MIX_FRAME_SIZE
;
925 ch
->volume_movement
= VG_MIN( ch
->volume_movement
, ch
->_
.volume_rate
);
926 ch
->_
.volume
= volume
;
928 vg_profile_end( &_vg_prof_audio_mix
);
931 VG_STATIC
void audio_mixer_callback( void *user
, u8
*stream
, int byte_count
)
934 * Copy data and move edit flags to commit flags
935 * ------------------------------------------------------------- */
938 v3_copy( vg_audio
.external_listener_pos
, vg_audio
.internal_listener_pos
);
939 v3_copy( vg_audio
.external_listener_ears
, vg_audio
.internal_listener_ears
);
940 v3_copy( vg_audio
.external_lister_velocity
,
941 vg_audio
.internal_listener_velocity
);
942 vg_audio
.internal_global_volume
= vg_audio
.external_global_volume
;
944 for( int i
=0; i
<AUDIO_CHANNELS
; i
++ ){
945 audio_channel
*ch
= &vg_audio
.channels
[i
];
950 if( ch
->activity
== k_channel_activity_alive
){
951 if( (ch
->cursor
>= ch
->source_length
) &&
952 !(ch
->flags
& AUDIO_FLAG_LOOP
) )
954 ch
->activity
= k_channel_activity_end
;
958 /* process relinquishments */
959 if( (ch
->activity
!= k_channel_activity_reset
) && ch
->_
.relinquished
){
960 if( (ch
->activity
== k_channel_activity_end
)
961 || (ch
->_
.volume
== 0.0f
)
962 || (ch
->activity
== k_channel_activity_error
) )
964 ch
->_
.relinquished
= 0;
966 ch
->activity
= k_channel_activity_reset
;
971 /* process new channels */
972 if( ch
->activity
== k_channel_activity_reset
){
973 ch
->_
= ch
->editable_state
;
975 ch
->source_length
= 0;
976 ch
->activity
= k_channel_activity_wake
;
979 if( ch
->editble_state_write_mask
& AUDIO_EDIT_OWNERSHIP
)
980 ch
->_
.relinquished
= ch
->editable_state
.relinquished
;
982 ch
->editable_state
.relinquished
= ch
->_
.relinquished
;
985 if( ch
->editble_state_write_mask
& AUDIO_EDIT_VOLUME
){
986 ch
->_
.volume
= ch
->editable_state
.volume
;
987 ch
->_
.volume_target
= ch
->editable_state
.volume
;
990 ch
->editable_state
.volume
= ch
->_
.volume
;
994 if( ch
->editble_state_write_mask
& AUDIO_EDIT_VOLUME_SLOPE
){
995 ch
->volume_movement_start
= ch
->_
.volume
;
996 ch
->volume_movement
= 0;
998 ch
->_
.volume_target
= ch
->editable_state
.volume_target
;
999 ch
->_
.volume_rate
= ch
->editable_state
.volume_rate
;
1002 ch
->editable_state
.volume_target
= ch
->_
.volume_target
;
1003 ch
->editable_state
.volume_rate
= ch
->_
.volume_rate
;
1007 if( ch
->editble_state_write_mask
& AUDIO_EDIT_SAMPLING_RATE
)
1008 ch
->_
.sampling_rate
= ch
->editable_state
.sampling_rate
;
1010 ch
->editable_state
.sampling_rate
= ch
->_
.sampling_rate
;
1013 if( ch
->editble_state_write_mask
& AUDIO_EDIT_LFO_ATTACHMENT
){
1014 ch
->_
.lfo
= ch
->editable_state
.lfo
;
1015 ch
->_
.lfo_amount
= ch
->editable_state
.lfo_amount
;
1018 ch
->editable_state
.lfo
= ch
->_
.lfo
;
1019 ch
->editable_state
.lfo_amount
= ch
->_
.lfo_amount
;
1023 if( ch
->editble_state_write_mask
& AUDIO_EDIT_SPACIAL
)
1024 v4_copy( ch
->editable_state
.spacial_falloff
,ch
->_
.spacial_falloff
);
1026 v4_copy( ch
->_
.spacial_falloff
,ch
->editable_state
.spacial_falloff
);
1029 /* currently readonly, i guess */
1030 ch
->editable_state
.pan_target
= ch
->_
.pan_target
;
1031 ch
->editable_state
.pan
= ch
->_
.pan
;
1032 ch
->editble_state_write_mask
= 0x00;
1035 for( int i
=0; i
<AUDIO_LFOS
; i
++ ){
1036 audio_lfo
*lfo
= &vg_audio
.oscillators
[ i
];
1038 if( lfo
->editble_state_write_mask
& AUDIO_EDIT_LFO_WAVE
){
1039 lfo
->_
.wave_type
= lfo
->editable_state
.wave_type
;
1041 if( lfo
->_
.wave_type
== k_lfo_polynomial_bipolar
){
1042 lfo
->_
.polynomial_coefficient
=
1043 lfo
->editable_state
.polynomial_coefficient
;
1044 lfo
->sqrt_polynomial_coefficient
=
1045 sqrtf(lfo
->_
.polynomial_coefficient
);
1049 if( lfo
->editble_state_write_mask
& AUDIO_EDIT_LFO_PERIOD
){
1050 if( lfo
->_
.period
){
1051 float t
= lfo
->time
;
1052 t
/= (float)lfo
->_
.period
;
1054 lfo
->_
.period
= lfo
->editable_state
.period
;
1055 lfo
->time
= lfo
->_
.period
* t
;
1059 lfo
->_
.period
= lfo
->editable_state
.period
;
1063 lfo
->editble_state_write_mask
= 0x00;
1066 dsp_update_tunings();
1071 * ------------------------------------------------------------- */
1072 for( int i
=0; i
<AUDIO_CHANNELS
; i
++ ){
1073 audio_channel
*ch
= &vg_audio
.channels
[i
];
1075 if( ch
->activity
== k_channel_activity_wake
){
1076 if( audio_channel_load_source( ch
) )
1077 ch
->activity
= k_channel_activity_alive
;
1079 ch
->activity
= k_channel_activity_error
;
1085 * -------------------------------------------------------- */
1086 int frame_count
= byte_count
/(2*sizeof(float));
1089 float *pOut32F
= (float *)stream
;
1090 for( int i
=0; i
<frame_count
*2; i
++ )
1093 for( int i
=0; i
<AUDIO_LFOS
; i
++ ){
1094 audio_lfo
*lfo
= &vg_audio
.oscillators
[i
];
1095 lfo
->time_startframe
= lfo
->time
;
1098 for( int i
=0; i
<AUDIO_CHANNELS
; i
++ ){
1099 audio_channel
*ch
= &vg_audio
.channels
[i
];
1101 if( ch
->activity
== k_channel_activity_alive
){
1103 ch
->_
.lfo
->time
= ch
->_
.lfo
->time_startframe
;
1105 u32 remaining
= frame_count
,
1109 audio_channel_mix( ch
, pOut32F
+subpos
);
1110 remaining
-= AUDIO_MIX_FRAME_SIZE
;
1111 subpos
+= AUDIO_MIX_FRAME_SIZE
*2;
1116 vg_profile_begin( &_vg_prof_dsp
);
1118 for( int i
=0; i
<frame_count
; i
++ )
1119 vg_dsp_process( pOut32F
+ i
*2, pOut32F
+ i
*2 );
1121 vg_profile_end( &_vg_prof_dsp
);
1125 for( int i
=0; i
<AUDIO_CHANNELS
; i
++ ){
1126 audio_channel
*ch
= &vg_audio
.channels
[i
];
1127 ch
->readable_activity
= ch
->activity
;
1130 /* Profiling information
1131 * ----------------------------------------------- */
1132 vg_profile_increment( &_vg_prof_audio_decode
);
1133 vg_profile_increment( &_vg_prof_audio_mix
);
1134 vg_profile_increment( &_vg_prof_dsp
);
1136 vg_prof_audio_mix
= _vg_prof_audio_mix
;
1137 vg_prof_audio_decode
= _vg_prof_audio_decode
;
1138 vg_prof_audio_dsp
= _vg_prof_dsp
;
1140 vg_audio
.samples_last
= frame_count
;
1142 if( vg_audio
.debug_ui
){
1143 vg_dsp_update_texture();
1149 VG_STATIC
void audio_clip_load( audio_clip
*clip
, void *lin_alloc
)
1151 if( lin_alloc
== NULL
)
1152 lin_alloc
= vg_audio
.audio_pool
;
1154 /* load in directly */
1155 u32 format
= clip
->flags
& AUDIO_FLAG_FORMAT
;
1157 /* TODO: This contains audio_lock() and unlock, but i don't know why
1158 * can probably remove them. Low priority to check this */
1160 /* TODO: packed files for vorbis etc, should take from data if its not not
1161 * NULL when we get the clip
1164 if( format
== k_audio_format_vorbis
){
1166 vg_fatal_exit_loop( "No path specified, embeded vorbis unsupported" );
1170 clip
->data
= vg_file_read( lin_alloc
, clip
->path
, &clip
->size
);
1174 vg_fatal_exit_loop( "Audio failed to load" );
1176 float mb
= (float)(clip
->size
) / (1024.0f
*1024.0f
);
1177 vg_info( "Loaded audio clip '%s' (%.1fmb)\n", clip
->path
, mb
);
1179 else if( format
== k_audio_format_stereo
){
1180 vg_fatal_exit_loop( "Unsupported format (Stereo uncompressed)" );
1182 else if( format
== k_audio_format_bird
){
1184 vg_fatal_exit_loop( "No data, external birdsynth unsupported" );
1187 u32 total_size
= clip
->size
+ sizeof(struct synth_bird
);
1188 total_size
-= sizeof(struct synth_bird_settings
);
1189 total_size
= vg_align8( total_size
);
1191 if( total_size
> AUDIO_DECODE_SIZE
)
1192 vg_fatal_exit_loop( "Bird coding too long\n" );
1194 struct synth_bird
*bird
= vg_linear_alloc( lin_alloc
, total_size
);
1195 memcpy( &bird
->settings
, clip
->data
, clip
->size
);
1198 clip
->size
= total_size
;
1200 vg_info( "Loaded bird synthesis pattern (%u bytes)\n", total_size
);
1204 vg_fatal_exit_loop( "No path specified, embeded mono unsupported" );
1207 vg_linear_clear( vg_mem
.scratch
);
1210 stb_vorbis_alloc alloc
= {
1211 .alloc_buffer
= vg_linear_alloc( vg_mem
.scratch
, AUDIO_DECODE_SIZE
),
1212 .alloc_buffer_length_in_bytes
= AUDIO_DECODE_SIZE
1215 void *filedata
= vg_file_read( vg_mem
.scratch
, clip
->path
, &fsize
);
1218 stb_vorbis
*decoder
= stb_vorbis_open_memory(
1219 filedata
, fsize
, &err
, &alloc
);
1222 vg_error( "stb_vorbis_open_memory failed on '%s' (%d)\n",
1224 vg_fatal_exit_loop( "Vorbis decode error" );
1227 /* only mono is supported in uncompressed */
1228 u32 length_samples
= stb_vorbis_stream_length_in_samples( decoder
),
1229 data_size
= length_samples
* sizeof(i16
);
1232 clip
->data
= vg_linear_alloc( lin_alloc
, vg_align8(data_size
) );
1233 clip
->size
= length_samples
;
1236 int read_samples
= stb_vorbis_get_samples_i16_downmixed(
1237 decoder
, clip
->data
, length_samples
);
1239 if( read_samples
!= length_samples
)
1240 vg_fatal_exit_loop( "Decode error" );
1242 float mb
= (float)(data_size
) / (1024.0f
*1024.0f
);
1243 vg_info( "Loaded audio clip '%s' (%.1fmb) %u samples\n", clip
->path
, mb
,
1248 VG_STATIC
void audio_clip_loadn( audio_clip
*arr
, int count
, void *lin_alloc
)
1250 for( int i
=0; i
<count
; i
++ )
1251 audio_clip_load( &arr
[i
], lin_alloc
);
1254 VG_STATIC
void audio_require_clip_loaded( audio_clip
*clip
)
1256 if( clip
->data
&& clip
->size
)
1260 vg_fatal_exit_loop( "Must load audio clip before playing! \n" );
1267 VG_STATIC
void audio_debug_ui( m4x4f mtx_pv
)
1269 if( !vg_audio
.debug_ui
)
1274 glBindTexture( GL_TEXTURE_2D
, vg_dsp
.view_texture
);
1275 glTexSubImage2D( GL_TEXTURE_2D
, 0, 0, 0, 256, 256,
1276 GL_RGBA
, GL_UNSIGNED_BYTE
,
1277 vg_dsp
.view_texture_buffer
);
1281 * -----------------------------------------------------------------------
1284 float budget
= ((double)vg_audio
.samples_last
/ 44100.0) * 1000.0;
1285 vg_profile_drawn( (struct vg_profile
*[]){ &vg_prof_audio_decode
,
1287 &vg_prof_audio_dsp
}, 3,
1288 budget
, (ui_rect
){ 4, VG_PROFILE_SAMPLE_COUNT
*2 + 8,
1295 vg_uictx
.cursor
[0] = 512 + 8;
1296 vg_uictx
.cursor
[1] = VG_PROFILE_SAMPLE_COUNT
*2+8+24+12+12;
1297 vg_uictx
.cursor
[2] = 150;
1298 vg_uictx
.cursor
[3] = 12;
1300 ui_rect view_thing
= { 4, vg
.window_y
-512-4, 512, 512 };
1301 ui_push_image( view_thing
, vg_dsp
.view_texture
);
1303 float mb1
= 1024.0f
*1024.0f
,
1304 usage
= vg_linear_get_cur( vg_audio
.audio_pool
) / mb1
,
1305 total
= vg_linear_get_capacity( vg_audio
.audio_pool
) / mb1
,
1306 percent
= (usage
/total
) * 100.0f
;
1308 snprintf( perf
, 127, "Mem: %.1f/%.1fmb (%.1f%%)\n", usage
, total
, percent
);
1310 ui_text( vg_uictx
.cursor
, perf
, 1, 0 );
1311 vg_uictx
.cursor
[1] += 20;
1313 ui_rect overlap_buffer
[ AUDIO_CHANNELS
];
1314 u32 overlap_length
= 0;
1316 /* Draw audio stack */
1317 for( int i
=0; i
<AUDIO_CHANNELS
; i
++ ){
1318 audio_channel
*ch
= &vg_audio
.channels
[i
];
1320 vg_uictx
.cursor
[2] = 400;
1321 vg_uictx
.cursor
[3] = 18;
1325 if( !ch
->allocated
){
1326 ui_fill_rect( vg_uictx
.cursor
, 0x50333333 );
1329 vg_uictx
.cursor
[1] += 1;
1333 const char *formats
[] =
1353 const char *activties
[] =
1362 u32 format_index
= (ch
->source
->flags
& AUDIO_FLAG_FORMAT
)>>9;
1364 snprintf( perf
, 127, "%02d %c%c%cD %s [%s] %4.2fv'%s'",
1366 (ch
->editable_state
.relinquished
)? 'r': '_',
1369 formats
[format_index
],
1370 activties
[ch
->readable_activity
],
1371 ch
->editable_state
.volume
,
1374 ui_fill_rect( vg_uictx
.cursor
, 0xa0000000 | ch
->colour
);
1376 vg_uictx
.cursor
[0] += 2;
1377 vg_uictx
.cursor
[1] += 2;
1378 ui_text( vg_uictx
.cursor
, perf
, 1, 0 );
1381 vg_uictx
.cursor
[1] += 1;
1383 if( AUDIO_FLAG_SPACIAL_3D
){
1385 v3_copy( ch
->editable_state
.spacial_falloff
, wpos
);
1388 m4x4_mulv( mtx_pv
, wpos
, wpos
);
1390 if( wpos
[3] > 0.0f
){
1391 v2_muls( wpos
, (1.0f
/wpos
[3]) * 0.5f
, wpos
);
1392 v2_add( wpos
, (v2f
){ 0.5f
, 0.5f
}, wpos
);
1395 wr
[0] = vg_clampf(wpos
[0] * vg
.window_x
, -32000.0f
,32000.0f
);
1396 wr
[1] = vg_clampf((1.0f
-wpos
[1]) * vg
.window_y
,-32000.0f
,32000.0f
);
1400 for( int j
=0; j
<12; j
++ ){
1402 for( int k
=0; k
<overlap_length
; k
++ ){
1403 ui_px
*wk
= overlap_buffer
[k
];
1404 if( ((wr
[0] <= wk
[0]+wk
[2]) && (wr
[0]+wr
[2] >= wk
[0])) &&
1405 ((wr
[1] <= wk
[1]+wk
[3]) && (wr
[1]+wr
[3] >= wk
[1])) )
1418 ui_text( wr
, perf
, 1, 0 );
1420 ui_rect_copy( wr
, overlap_buffer
[ overlap_length
++ ] );
1428 #endif /* VG_AUDIO_H */