1 // Copyright (C) 2021 Harry Godden (hgn) - All Rights Reserved
3 #define MINIAUDIO_IMPLEMENTATION
4 #include "dr_soft/miniaudio.h"
6 #define STB_VORBIS_MAX_CHANNELS 2
7 #include "stb/stb_vorbis.h"
9 #define SFX_MAX_SYSTEMS 32
10 #define SFX_FLAG_ONESHOT 0x1
11 #define SFX_FLAG_STEREO 0x2
12 #define SFX_FLAG_REPEAT 0x4
13 #define SFX_FLAG_GHOST 0x8
14 #define FADEOUT_LENGTH 441
15 #define FADEOUT_DIVISOR (1.f/(float)FADEOUT_LENGTH)
17 typedef struct sfx_vol_control sfx_vol_control
;
18 typedef struct sfx_system sfx_system
;
20 struct sfx_vol_control
28 // Source buffer start
29 float *source
, *replacement
;
32 sfx_vol_control
*vol_src
;
36 int ch
, end
, cur
, cur_lagged
;
40 u32 fadeout
, fadeout_current
;
42 sfx_system
*thread_clone
; // Memory of this structure is copied into thread 2
45 float signal_average
; // Current signal volume
49 // Set of up to 8 sound effects packed into one
50 typedef struct sfx_set sfx_set
;
56 u32 segments
[16]; //from->to,from->to ...
62 ma_device g_aud_device
;
63 ma_device_config g_aud_dconfig
;
65 // Thread 1 - audio engine ( spawned from miniaudio.h )
66 // ======================================================
67 sfx_system sfx_sys
[SFX_MAX_SYSTEMS
];
70 // Thread 0 - Critical transfer section
71 // ======================================================
72 MUTEX_TYPE sfx_mux_t01
; // Resources share: 0 & 1
74 sfx_system
*sfx_q
[SFX_MAX_SYSTEMS
]; // Stuff changed
75 int sfx_q_len
= 0; // How much
78 // ======================================================
80 // g_vol_master is never directly acessed by users
81 float g_master_volume
= 1.f
;
83 // Decompress entire vorbis stream into buffer
84 static float *sfx_vorbis_stream( const unsigned char *data
, int len
, int channels
, u32
*samples
)
87 stb_vorbis
*pv
= stb_vorbis_open_memory( data
, len
, &err
, NULL
);
91 vg_error( "stb_vorbis_open_memory() failed with error code: %i\n", err
);
95 u32 length_samples
= stb_vorbis_stream_length_in_samples( pv
);
96 float *buffer
= (float *)malloc( length_samples
* channels
* sizeof( float ));
100 stb_vorbis_close( pv
);
101 vg_error( "out of memory while allocating sound resource\n" );
105 int read_samples
= stb_vorbis_get_samples_float_interleaved( pv
, channels
, buffer
, length_samples
* channels
);
106 if( read_samples
!= length_samples
)
108 vg_warn( "| warning: sample count mismatch. Expected %u got %i\n", length_samples
, read_samples
);
109 length_samples
= read_samples
;
112 stb_vorbis_close( pv
);
113 *samples
= length_samples
;
117 static float *sfx_vorbis( const char *strFileName
, int channels
, u32
*samples
)
120 void *filedata
= vg_asset_read_s( strFileName
, &len
);
124 float *wav
= sfx_vorbis_stream( filedata
, len
, channels
, samples
);
130 vg_error( "OGG load failed\n" );
135 typedef struct sfx_bgload sfx_bgload_t
;
146 void(*OnComplete
)(sfx_bgload_t
*inf
);
149 // Thread worker for background load job
150 void *sfx_vorbis_a_t( void *_inf
)
152 sfx_bgload_t
*info
= _inf
;
155 info
->buffer
= sfx_vorbis( info
->path
, info
->channels
, &info
->samples
);
156 info
->OnComplete( info
);
161 // Asynchronous resource load
162 int sfx_vorbis_a( const char *path
, int channels
, void(*OnComplete
)(sfx_bgload_t
*inf
), void *user
)
164 vg_info( "background job started for: %s\n", path
);
166 sfx_bgload_t
*params
= malloc( sizeof( sfx_bgload_t
) );
167 params
->path
= malloc( strlen( path
) + 1 );
168 strcpy( params
->path
, path
);
169 params
->OnComplete
= OnComplete
;
171 params
->channels
= channels
;
173 return vg_thread_run( sfx_vorbis_a_t
, params
);
176 // Asynchronous load-to-system callback
177 struct sfx_vorbis_a_to_inf
183 #define SFX_A_FLAG_AUTOSTART 0x1
184 #define SFX_A_FLAG_AUTOFREE 0x2
186 static int sfx_save( sfx_system
*sys
);
188 // Asynchronous load-to-system callback
189 void sfx_vorbis_a_to_c( sfx_bgload_t
*loadinf
)
191 struct sfx_vorbis_a_to_inf
*inf
= loadinf
->user
;
193 // Mark buffer for deallocation if autofree is set
194 if( inf
->flags
& SFX_A_FLAG_AUTOFREE
)
195 inf
->sys
->replacement
= loadinf
->buffer
;
197 inf
->sys
->source
= loadinf
->buffer
;
199 inf
->sys
->end
= loadinf
->samples
;
201 if( inf
->flags
& SFX_A_FLAG_AUTOSTART
)
202 sfx_save( inf
->sys
);
204 free( loadinf
->path
);
209 // Asynchronous vorbis load into audio system
210 void sfx_vorbis_a_to( sfx_system
*sys
, const char *strFileName
, int channels
, u32 flags
)
212 struct sfx_vorbis_a_to_inf
*inf
= malloc( sizeof( struct sfx_vorbis_a_to_inf
) );
218 if( !sfx_vorbis_a( strFileName
, channels
, sfx_vorbis_a_to_c
, inf
) )
223 // ======================================================
225 // Mark change to be uploaded to queue system
226 static int sfx_save( sfx_system
*sys
)
228 MUTEX_LOCK( sfx_mux_t01
);
230 if( sfx_q_len
>= SFX_MAX_SYSTEMS
)
232 vg_error( "Warning: No free space in sound queue\n" );
234 MUTEX_UNLOCK( sfx_mux_t01
);
238 // Mark change in queue
239 sfx_q
[ sfx_q_len
++ ] = sys
;
241 MUTEX_UNLOCK( sfx_mux_t01
);
246 // Edit a volume float, has to be function wrapped because of mutex
247 static void sfx_vol_fset( sfx_vol_control
*src
, float to
)
249 MUTEX_LOCK( sfx_mux_t01
);
253 MUTEX_UNLOCK( sfx_mux_t01
);
256 // thread-safe get volume value
257 static float sfx_vol_fget( sfx_vol_control
*src
)
261 MUTEX_LOCK( sfx_mux_t01
);
265 MUTEX_UNLOCK( sfx_mux_t01
);
270 // thread-safe set master volume
271 static void sfx_set_master( float to
)
273 MUTEX_LOCK( sfx_mux_t01
);
275 g_master_volume
= to
;
277 MUTEX_UNLOCK( sfx_mux_t01
);
280 // thread-safe get master volume
281 static float sfx_get_master(void)
285 MUTEX_LOCK( sfx_mux_t01
);
287 val
= g_master_volume
;
289 MUTEX_UNLOCK( sfx_mux_t01
);
294 void audio_mixer_callback( ma_device
*pDevice
, void *pOutBuf
, const void *pInput
, ma_uint32 frameCount
);
297 static void vg_audio_init(void)
299 g_aud_dconfig
= ma_device_config_init( ma_device_type_playback
);
300 g_aud_dconfig
.playback
.format
= ma_format_f32
;
301 g_aud_dconfig
.playback
.channels
= 2;
302 g_aud_dconfig
.sampleRate
= 44100;
303 g_aud_dconfig
.dataCallback
= audio_mixer_callback
;
305 g_aud_dconfig
.pUserData
= NULL
;
307 vg_info( "Starting audio engine\n" );
309 if( ma_device_init( NULL
, &g_aud_dconfig
, &g_aud_device
) != MA_SUCCESS
)
311 vg_exiterr( "ma_device failed to initialize" );
315 if( ma_device_start( &g_aud_device
) != MA_SUCCESS
)
317 ma_device_uninit( &g_aud_device
);
318 vg_exiterr( "ma_device failed to start" );
323 #ifndef VYGER_RELEASE
324 u32 num_sfx_sets
= 0;
327 // Shutdown audio device
328 static void vg_audio_free(void)
330 ma_device_uninit( &g_aud_device
);
333 // (debug) make sure we are shutting down safely
334 static void sfx_sys_chkerr(void)
336 #ifndef VYGER_RELEASE
339 vg_error( "Leaked %u sfx sets\n", num_sfx_sets
);
345 // ======================================================
347 // Create and return slot for a sound
348 static sfx_system
*sfx_alloc(void)
350 if( sfx_sys_len
>= SFX_MAX_SYSTEMS
)
355 // A conditional is done against this in localization step,
356 // Needs to be initialized.
357 sfx_sys
[ sfx_sys_len
].source
= NULL
;
359 return sfx_sys
+ (sfx_sys_len
++);
362 // Fetch samples into pcf
363 static void audio_mixer_getsamples( float *pcf
, float *source
, u32 cur
, u32 ch
)
367 pcf
[0] = source
[ cur
*2+0 ];
368 pcf
[1] = source
[ cur
*2+1 ];
372 pcf
[0] = source
[ cur
];
373 pcf
[1] = source
[ cur
];
377 // miniaudio.h interface
378 void audio_mixer_callback( ma_device
*pDevice
, void *pOutBuf
, const void *pInput
, ma_uint32 frameCount
)
380 // Process incoming sound queue
381 MUTEX_LOCK( sfx_mux_t01
);
383 while( sfx_q_len
--> 0 )
385 sfx_system
*src
= sfx_q
[sfx_q_len
];
388 // This is a 'new' sound if thread_clone not set.
389 if( !src
->thread_clone
|| src
->flags
& SFX_FLAG_ONESHOT
)
391 src
->thread_clone
= sfx_alloc();
392 if( !src
->thread_clone
)
397 // Modifying an active system spawns a small fadeout ghost system
398 sfx_system
*ghost_system
= sfx_alloc();
403 ghost_system
->source
= src
->source
;
404 ghost_system
->ch
= src
->ch
;
405 ghost_system
->end
= src
->end
;
406 ghost_system
->cur
= src
->cur_lagged
;
407 ghost_system
->flags
= SFX_FLAG_GHOST
;
408 ghost_system
->fadeout
= FADEOUT_LENGTH
;
409 ghost_system
->fadeout_current
= FADEOUT_LENGTH
;
410 ghost_system
->vol_src
= src
->vol_src
;
411 ghost_system
->name
= src
->name
;
412 ghost_system
->thread_clone
= src
;
415 clone
= src
->thread_clone
;
417 // run replacement routine if one is waiting (todo: what is this?)
418 if( src
->replacement
)
422 src
->source
= src
->replacement
;
423 src
->replacement
= NULL
;
426 // Localize data to thread 1's memory pool
427 clone
->source
= src
->source
;
429 clone
->end
= src
->end
;
430 clone
->cur
= src
->cur
;
431 clone
->flags
= src
->flags
;
432 clone
->vol_src
= src
->vol_src
;
433 clone
->name
= src
->name
;
434 clone
->fadeout
= src
->fadeout
;
435 clone
->fadeout_current
= src
->fadeout_current
;
437 // loopback pointer, mainly used for persistent sound handles
438 clone
->thread_clone
= src
;
443 // Pull in volume sliders
444 for( int i
= 0; i
< sfx_sys_len
; i
++ )
446 sfx_system
*sys
= sfx_sys
+ i
;
447 sys
->vol
= sys
->thread_clone
->vol
* g_master_volume
;
450 sys
->vol
*= sys
->vol_src
->val
;
453 MUTEX_UNLOCK( sfx_mux_t01
);
455 // Clear buffer ( is necessary ? )
456 float *pOut32F
= (float *)pOutBuf
;
457 for( int i
= 0; i
< frameCount
* 2; i
++ ){
461 // Do something with local..
462 for( int i
= 0; i
< sfx_sys_len
; i
++ )
464 sfx_system
*sys
= sfx_sys
+ i
;
466 u32 cursor
= sys
->cur
, buffer_pos
= 0;
469 float pcf
[2] = { 0.f
, 0.0f
};
471 u32 frames_write
= frameCount
;
472 float fadeout_divisor
= 1.0f
/ (float)sys
->fadeout
;
474 while( frames_write
)
476 u32 samples_this_run
= vg_min( frames_write
, sys
->end
- cursor
);
480 // Force this system to be removed
481 if( sys
->fadeout_current
== 0 )
483 sys
->flags
= SFX_FLAG_GHOST
;
488 samples_this_run
= vg_min( samples_this_run
, sys
->fadeout_current
);
491 for( u32 j
= 0; j
< samples_this_run
; j
++ )
493 audio_mixer_getsamples( pcf
, sys
->source
, cursor
, sys
->ch
);
495 float vol
= sys
->vol
;
499 vol
*= (float)sys
->fadeout_current
* fadeout_divisor
;
500 sys
->fadeout_current
--;
503 pOut32F
[ buffer_pos
*2+0 ] += pcf
[0] * vol
;
504 pOut32F
[ buffer_pos
*2+1 ] += pcf
[1] * vol
;
506 avgvol
+= fabs( pcf
[0] * vol
);
507 avgvol
+= fabs( pcf
[1] * vol
);
513 frames_write
-= samples_this_run
;
515 if( sys
->flags
& SFX_FLAG_REPEAT
)
525 sys
->cur_lagged
= cursor
;
526 sys
->signal_average
= avgvol
/ (float)(buffer_pos
*2);
532 // Redistribute sound systems
533 MUTEX_LOCK( sfx_mux_t01
);
535 unsigned int idx
= 0, wr
= 0;
536 while( idx
!= sfx_sys_len
)
538 sfx_system
*src
= sfx_sys
+ idx
;
540 // Keep only if cursor is before end or repeating
541 if( src
->cur
< src
->end
|| (src
->flags
& SFX_FLAG_REPEAT
) )
543 // Correct source pointer on persisitent originals since we shifted ID's
544 if( !(src
->flags
& SFX_FLAG_ONESHOT
) )
545 src
->thread_clone
->thread_clone
= sfx_sys
+ wr
;
547 sfx_sys
[ wr
++ ] = sfx_sys
[ idx
];
551 // Clear link on persistent sources (done playing)
552 if( !(src
->flags
& SFX_FLAG_ONESHOT
) )
553 src
->thread_clone
->thread_clone
= NULL
;
560 MUTEX_UNLOCK( sfx_mux_t01
);
565 // Load strings into sfx_set's memory
566 // String layout: "sounda.ogg\0soundb.ogg\0soundc.ogg\0\0"
567 void sfx_set_strings( sfx_set
*dest
, char *strSources
, u32 flags
, int bAsync
)
569 printf( "Init sfx set\n| start | end | length | name \n" );
571 dest
->ch
= (flags
& SFX_FLAG_STEREO
)? 2: 1;
574 dest
->numsegments
= 0;
575 char *source
= strSources
;
579 while( (len
= strlen( source
)) )
582 float *sound
= sfx_vorbis( source
, dest
->ch
, &samples
);
587 dest
->numsegments
= 0;
593 float *nbuf
= realloc( dest
->main
, total
* dest
->ch
* sizeof(float) );
598 memcpy( dest
->main
+ (total
-samples
)*dest
->ch
, sound
, samples
*dest
->ch
*sizeof(float) );
601 dest
->segments
[ dest
->numsegments
*2+0 ] = total
-samples
;
602 dest
->segments
[ dest
->numsegments
*2+1 ] = total
;
604 printf( "| %09u | %09u | %09u | %s\n", total
-samples
, total
, samples
, source
);
608 vg_error( "realloc() failed\n" );
614 dest
->numsegments
++;
617 vg_info( "finished, numsegments: %u\n", dest
->numsegments
);
620 void sfx_set_init( sfx_set
*dest
, char *sources
)
622 #ifndef VYGER_RELEASE
628 sfx_set_strings( dest
, dest
->sources
, dest
->flags
, 0 );
632 sfx_set_strings( dest
, sources
, dest
->flags
, 0 );
636 // Pick a random sound from the buffer and play it into system
637 void sfx_set_playrnd( sfx_set
*source
, sfx_system
*sys
, int min_id
, int max_id
)
639 if( !source
->numsegments
)
644 int pick
= (rand() % (max_id
-min_id
)) + min_id
;
647 sys
->source
= source
->main
;
648 sys
->cur
= source
->segments
[ pick
*2 + 0 ];
649 sys
->end
= source
->segments
[ pick
*2 + 1 ];
650 sys
->ch
= source
->ch
;
655 static void sfx_system_fadeout( sfx_system
*sys
, u32 length_samples
)
657 sys
->fadeout_current
= length_samples
;
658 sys
->fadeout
= length_samples
;
663 // Free set resources
664 void sfx_set_free( sfx_set
*set
)
666 #ifndef VYGER_RELEASE