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_PERSISTENT 0x8
14 #define FADEOUT_LENGTH 4410
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 sfx_system
*persisitent_source
;
30 // Source buffer start
31 float *source
, *replacement
;
33 u32 clip_start
, clip_end
, buffer_length
;
36 sfx_vol_control
*vol_src
;
44 u32 fadeout
, fadeout_current
;
50 // Set of up to 8 sound effects packed into one
51 typedef struct sfx_set sfx_set
;
57 u32 segments
[20]; //from->to,from->to ...
63 ma_device g_aud_device
;
64 ma_device_config g_aud_dconfig
;
66 // Thread 1 - audio engine ( spawned from miniaudio.h )
67 // ======================================================
68 sfx_system sfx_sys
[SFX_MAX_SYSTEMS
];
71 // Thread 0 - Critical transfer section
72 // ======================================================
73 MUTEX_TYPE sfx_mux_t01
; // Resources share: 0 & 1
75 sfx_system
*sfx_q
[SFX_MAX_SYSTEMS
]; // Stuff changed
76 int sfx_q_len
= 0; // How much
79 // ======================================================
81 // g_vol_master is never directly acessed by users
82 float g_master_volume
= 1.f
;
84 // Decompress entire vorbis stream into buffer
85 static float *sfx_vorbis_stream( const unsigned char *data
, int len
, int channels
, u32
*samples
)
88 stb_vorbis
*pv
= stb_vorbis_open_memory( data
, len
, &err
, NULL
);
92 vg_error( "stb_vorbis_open_memory() failed with error code: %i\n", err
);
96 u32 length_samples
= stb_vorbis_stream_length_in_samples( pv
);
97 float *buffer
= (float *)malloc( length_samples
* channels
* sizeof( float ));
101 stb_vorbis_close( pv
);
102 vg_error( "out of memory while allocating sound resource\n" );
106 int read_samples
= stb_vorbis_get_samples_float_interleaved( pv
, channels
, buffer
, length_samples
* channels
);
107 if( read_samples
!= length_samples
)
109 vg_warn( "| warning: sample count mismatch. Expected %u got %i\n", length_samples
, read_samples
);
110 length_samples
= read_samples
;
113 stb_vorbis_close( pv
);
114 *samples
= length_samples
;
118 static float *sfx_vorbis( const char *strFileName
, int channels
, u32
*samples
)
121 void *filedata
= vg_asset_read_s( strFileName
, &len
);
125 float *wav
= sfx_vorbis_stream( filedata
, len
, channels
, samples
);
131 vg_error( "OGG load failed\n" );
136 typedef struct sfx_bgload sfx_bgload_t
;
147 void(*OnComplete
)(sfx_bgload_t
*inf
);
150 // Thread worker for background load job
151 void *sfx_vorbis_a_t( void *_inf
)
153 sfx_bgload_t
*info
= _inf
;
156 info
->buffer
= sfx_vorbis( info
->path
, info
->channels
, &info
->samples
);
157 info
->OnComplete( info
);
162 // Asynchronous resource load
163 int sfx_vorbis_a( const char *path
, int channels
, void(*OnComplete
)(sfx_bgload_t
*inf
), void *user
)
165 vg_info( "background job started for: %s\n", path
);
167 sfx_bgload_t
*params
= malloc( sizeof( sfx_bgload_t
) );
168 params
->path
= malloc( strlen( path
) + 1 );
169 strcpy( params
->path
, path
);
170 params
->OnComplete
= OnComplete
;
172 params
->channels
= channels
;
174 return vg_thread_run( sfx_vorbis_a_t
, params
);
177 // Asynchronous load-to-system callback
178 struct sfx_vorbis_a_to_inf
184 #define SFX_A_FLAG_AUTOSTART 0x1
185 #define SFX_A_FLAG_AUTOFREE 0x2
188 static int sfx_save( sfx_system *sys );
190 // Asynchronous load-to-system callback
191 void sfx_vorbis_a_to_c( sfx_bgload_t *loadinf )
193 struct sfx_vorbis_a_to_inf *inf = loadinf->user;
195 // Mark buffer for deallocation if autofree is set
196 if( inf->flags & SFX_A_FLAG_AUTOFREE )
197 inf->sys->replacement = loadinf->buffer;
199 inf->sys->source = loadinf->buffer;
201 inf->sys->end = loadinf->samples;
203 if( inf->flags & SFX_A_FLAG_AUTOSTART )
204 sfx_save( inf->sys );
206 free( loadinf->path );
211 // Asynchronous vorbis load into audio system
212 void sfx_vorbis_a_to( sfx_system *sys, const char *strFileName, int channels, u32 flags )
214 struct sfx_vorbis_a_to_inf *inf = malloc( sizeof( struct sfx_vorbis_a_to_inf ) );
220 if( !sfx_vorbis_a( strFileName, channels, sfx_vorbis_a_to_c, inf ) )
225 // ======================================================
227 static int sfx_begin_edit( sfx_system
*sys
)
229 MUTEX_LOCK( sfx_mux_t01
);
231 if( sfx_q_len
>= SFX_MAX_SYSTEMS
)
233 MUTEX_UNLOCK( sfx_mux_t01
);
234 vg_warn( "Warning: No free space in sound queue\n" );
241 static void sfx_end_edit( sfx_system
*sys
)
243 MUTEX_UNLOCK( sfx_mux_t01
);
246 // Mark change to be uploaded to queue system
247 static int sfx_push( sfx_system
*sys
)
249 // Mark change in queue
250 sfx_q
[ sfx_q_len
++ ] = sys
;
252 MUTEX_UNLOCK( sfx_mux_t01
);
257 // Edit a volume float, has to be function wrapped because of mutex
258 static void sfx_vol_fset( sfx_vol_control
*src
, float to
)
260 MUTEX_LOCK( sfx_mux_t01
);
264 MUTEX_UNLOCK( sfx_mux_t01
);
267 // thread-safe get volume value
268 static float sfx_vol_fget( sfx_vol_control
*src
)
272 MUTEX_LOCK( sfx_mux_t01
);
276 MUTEX_UNLOCK( sfx_mux_t01
);
281 // thread-safe set master volume
282 static void sfx_set_master( float to
)
284 MUTEX_LOCK( sfx_mux_t01
);
286 g_master_volume
= to
;
288 MUTEX_UNLOCK( sfx_mux_t01
);
291 // thread-safe get master volume
292 static float sfx_get_master(void)
296 MUTEX_LOCK( sfx_mux_t01
);
298 val
= g_master_volume
;
300 MUTEX_UNLOCK( sfx_mux_t01
);
305 void audio_mixer_callback( ma_device
*pDevice
, void *pOutBuf
, const void *pInput
, ma_uint32 frameCount
);
308 static void vg_audio_init(void)
310 g_aud_dconfig
= ma_device_config_init( ma_device_type_playback
);
311 g_aud_dconfig
.playback
.format
= ma_format_f32
;
312 g_aud_dconfig
.playback
.channels
= 2;
313 g_aud_dconfig
.sampleRate
= 44100;
314 g_aud_dconfig
.dataCallback
= audio_mixer_callback
;
316 g_aud_dconfig
.pUserData
= NULL
;
318 vg_info( "Starting audio engine\n" );
320 if( ma_device_init( NULL
, &g_aud_dconfig
, &g_aud_device
) != MA_SUCCESS
)
322 vg_exiterr( "ma_device failed to initialize" );
326 if( ma_device_start( &g_aud_device
) != MA_SUCCESS
)
328 ma_device_uninit( &g_aud_device
);
329 vg_exiterr( "ma_device failed to start" );
334 // Shutdown audio device
335 static void vg_audio_free(void)
337 ma_device_uninit( &g_aud_device
);
341 // ======================================================
343 // Create and return slot for a sound
344 static sfx_system
*sfx_alloc(void)
346 if( sfx_sys_len
>= SFX_MAX_SYSTEMS
)
349 // A conditional is done against this in localization step,
350 // Needs to be initialized.
351 sfx_sys
[ sfx_sys_len
].source
= NULL
;
353 return sfx_sys
+ (sfx_sys_len
++);
356 // Fetch samples into pcf
357 static void audio_mixer_getsamples( float *pcf
, float *source
, u32 cur
, u32 ch
)
361 pcf
[0] = source
[ cur
*2+0 ];
362 pcf
[1] = source
[ cur
*2+1 ];
366 pcf
[0] = source
[ cur
];
367 pcf
[1] = source
[ cur
];
371 // miniaudio.h interface
372 void audio_mixer_callback( ma_device
*pDevice
, void *pOutBuf
, const void *pInput
, ma_uint32 frameCount
)
374 // Process incoming sound queue
375 MUTEX_LOCK( sfx_mux_t01
);
377 while( sfx_q_len
--> 0 )
379 sfx_system
*src
= sfx_q
[sfx_q_len
];
386 // Links need to exist on persistent sounds
387 clone
->persisitent_source
= src
->flags
& SFX_FLAG_PERSISTENT
? src
: NULL
;
393 for( int i
= 0; i
< sfx_sys_len
; i
++ )
395 sfx_system
*sys
= sfx_sys
+ i
;
397 // Apply persistent volume if linked
398 if( sys
->flags
& SFX_FLAG_PERSISTENT
)
400 sys
->vol
= sys
->persisitent_source
->vol
* g_master_volume
;
402 // Persistent triggers
403 // -------------------
405 // Fadeout effect ( + remove )
406 if( sys
->persisitent_source
->fadeout
)
408 sys
->fadeout_current
= sys
->persisitent_source
->fadeout_current
;
409 sys
->fadeout
= sys
->persisitent_source
->fadeout
;
411 sys
->persisitent_source
= NULL
;
412 sys
->flags
&= ~SFX_FLAG_PERSISTENT
;
416 // Apply volume slider if it has one linked
418 sys
->cvol
= sys
->vol
* sys
->vol_src
->val
;
420 sys
->cvol
= sys
->vol
;
423 MUTEX_UNLOCK( sfx_mux_t01
);
426 float *pOut32F
= (float *)pOutBuf
;
427 for( int i
= 0; i
< frameCount
* 2; i
++ ){
431 for( int i
= 0; i
< sfx_sys_len
; i
++ )
433 sfx_system
*sys
= sfx_sys
+ i
;
435 u32 cursor
= sys
->cur
, buffer_pos
= 0;
436 float pcf
[2] = { 0.f
, 0.0f
};
438 u32 frames_write
= frameCount
;
439 float fadeout_divisor
= 1.0f
/ (float)sys
->fadeout
;
441 while( frames_write
)
443 u32 samples_this_run
= VG_MIN( frames_write
, sys
->end
- cursor
);
447 // Force this system to be removed now
448 if( sys
->fadeout_current
== 0 )
450 sys
->flags
&= 0x00000000;
455 samples_this_run
= VG_MIN( samples_this_run
, sys
->fadeout_current
);
458 for( u32 j
= 0; j
< samples_this_run
; j
++ )
460 audio_mixer_getsamples( pcf
, sys
->source
, cursor
, sys
->ch
);
462 float vol
= sys
->vol
;
466 vol
*= (float)sys
->fadeout_current
* fadeout_divisor
;
467 sys
->fadeout_current
--;
470 if( buffer_pos
>= frameCount
)
475 pOut32F
[ buffer_pos
*2+0 ] += pcf
[0] * vol
;
476 pOut32F
[ buffer_pos
*2+1 ] += pcf
[1] * vol
;
482 frames_write
-= samples_this_run
;
484 if( sys
->flags
& SFX_FLAG_REPEAT
)
498 // Redistribute sound systems
499 MUTEX_LOCK( sfx_mux_t01
);
502 while( idx
!= sfx_sys_len
)
504 sfx_system
*src
= sfx_sys
+ idx
;
506 // Keep only if cursor is before end or repeating
507 if( src
->cur
< src
->end
|| (src
->flags
& SFX_FLAG_REPEAT
) )
509 sfx_sys
[ wr
++ ] = sfx_sys
[ idx
];
516 MUTEX_UNLOCK( sfx_mux_t01
);
521 // Load strings into sfx_set's memory
522 // String layout: "sounda.ogg\0soundb.ogg\0soundc.ogg\0\0"
523 static void sfx_set_strings( sfx_set
*dest
, char *strSources
, u32 flags
, int bAsync
)
525 printf( "Init sfx set\n| start | end | length | name \n" );
527 dest
->ch
= (flags
& SFX_FLAG_STEREO
)? 2: 1;
530 dest
->numsegments
= 0;
531 char *source
= strSources
;
535 while( (len
= strlen( source
)) )
538 float *sound
= sfx_vorbis( source
, dest
->ch
, &samples
);
543 dest
->numsegments
= 0;
549 float *nbuf
= realloc( dest
->main
, total
* dest
->ch
* sizeof(float) );
554 memcpy( dest
->main
+ (total
-samples
)*dest
->ch
, sound
, samples
*dest
->ch
*sizeof(float) );
557 dest
->segments
[ dest
->numsegments
*2+0 ] = total
-samples
;
558 dest
->segments
[ dest
->numsegments
*2+1 ] = total
;
560 printf( "| %09u | %09u | %09u | %s\n", total
-samples
, total
, samples
, source
);
564 vg_error( "realloc() failed\n" );
570 dest
->numsegments
++;
573 vg_info( "finished, numsegments: %u\n", dest
->numsegments
);
576 static void sfx_set_init( sfx_set
*dest
, char *sources
)
579 sfx_set_strings( dest
, dest
->sources
, dest
->flags
, 0 );
581 sfx_set_strings( dest
, sources
, dest
->flags
, 0 );
584 static void sfx_set_play( sfx_set
*source
, sfx_system
*sys
, int id
)
586 if( sfx_begin_edit( sys
) )
589 sys
->fadeout_current
= 0;
590 sys
->source
= source
->main
;
591 sys
->cur
= source
->segments
[ id
*2 + 0 ];
592 sys
->end
= source
->segments
[ id
*2 + 1 ];
593 sys
->ch
= source
->ch
;
596 sys
->clip_start
= sys
->cur
;
597 sys
->clip_end
= sys
->end
;
598 sys
->buffer_length
= source
->segments
[ (source
->numsegments
-1)*2 + 1 ];
604 // Pick a random sound from the buffer and play it into system
605 static void sfx_set_playrnd( sfx_set
*source
, sfx_system
*sys
, int min_id
, int max_id
)
607 if( !source
->numsegments
)
610 if( max_id
> source
->numsegments
)
612 vg_error( "Max ID out of range for playrnd\n" );
616 int pick
= (rand() % (max_id
-min_id
)) + min_id
;
618 sfx_set_play( source
, sys
, pick
);
621 static void sfx_system_fadeout( sfx_system
*sys
, u32 length_samples
)
623 if( sfx_begin_edit( sys
) )
625 sys
->fadeout_current
= length_samples
;
626 sys
->fadeout
= length_samples
;
632 // Free set resources
633 static void sfx_set_free( sfx_set
*set
)