--- /dev/null
+// Copyright (C) 2021 Harry Godden (hgn) - All Rights Reserved
+
+#define MINIAUDIO_IMPLEMENTATION
+#include "dr_soft/miniaudio.h"
+
+#define STB_VORBIS_MAX_CHANNELS 2
+#include "stb/stb_vorbis.h"
+
+#define SFX_MAX_SYSTEMS 32
+//#define SFX_FLAG_ONESHOT 0x1
+#define SFX_FLAG_STEREO 0x2
+#define SFX_FLAG_REPEAT 0x4
+#define SFX_FLAG_PERSISTENT 0x8
+#define FADEOUT_LENGTH 4410
+#define FADEOUT_DIVISOR (1.f/(float)FADEOUT_LENGTH)
+
+typedef struct sfx_vol_control sfx_vol_control;
+typedef struct sfx_system sfx_system;
+
+struct sfx_vol_control
+{
+ float val;
+ const char *name;
+};
+
+struct sfx_system
+{
+ sfx_system *persisitent_source;
+ int in_queue;
+
+ // Source buffer start
+ float *source, *replacement;
+
+ u32 clip_start, clip_end, buffer_length;
+
+ // Modifiers
+ sfx_vol_control *vol_src;
+ float vol, cvol;
+
+ // Info
+ u32 ch, end, cur;
+ u32 flags;
+
+ // Effects
+ u32 fadeout, fadeout_current;
+
+ // Diagnostic
+ const char *name;
+};
+
+// Set of up to 8 sound effects packed into one
+typedef struct sfx_set sfx_set;
+struct sfx_set
+{
+ float *main;
+ char *sources;
+
+ u32 segments[32]; //from->to,from->to ...
+ u32 numsegments;
+ u32 ch;
+ u32 flags;
+};
+
+ma_device g_aud_device;
+ma_device_config g_aud_dconfig;
+
+// Thread 1 - audio engine ( spawned from miniaudio.h )
+// ======================================================
+sfx_system sfx_sys[SFX_MAX_SYSTEMS];
+int sfx_sys_len = 0;
+
+// Thread 0 - Critical transfer section
+// ======================================================
+MUTEX_TYPE sfx_mux_t01; // Resources share: 0 & 1
+
+sfx_system *sfx_q[SFX_MAX_SYSTEMS]; // Stuff changed
+int sfx_q_len = 0; // How much
+
+// x / 2
+// ======================================================
+
+// g_vol_master is never directly acessed by users
+float g_master_volume = 1.f;
+
+// Decompress entire vorbis stream into buffer
+static float *sfx_vorbis_stream( const unsigned char *data, int len, int channels, u32 *samples )
+{
+ int err;
+ stb_vorbis *pv = stb_vorbis_open_memory( data, len, &err, NULL );
+
+ if( !pv )
+ {
+ vg_error( "stb_vorbis_open_memory() failed with error code: %i\n", err );
+ return NULL;
+ }
+
+ u32 length_samples = stb_vorbis_stream_length_in_samples( pv );
+ float *buffer = (float *)malloc( length_samples * channels * sizeof( float ));
+
+ if( !buffer )
+ {
+ stb_vorbis_close( pv );
+ vg_error( "out of memory while allocating sound resource\n" );
+ return NULL;
+ }
+
+ int read_samples = stb_vorbis_get_samples_float_interleaved( pv, channels, buffer, length_samples * channels );
+ if( read_samples != length_samples )
+ {
+ vg_warn( "| warning: sample count mismatch. Expected %u got %i\n", length_samples, read_samples );
+ length_samples = read_samples;
+ }
+
+ stb_vorbis_close( pv );
+ *samples = length_samples;
+ return buffer;
+}
+
+static float *sfx_vorbis( const char *strFileName, int channels, u32 *samples )
+{
+ i64 len;
+ void *filedata = vg_asset_read_s( strFileName, &len );
+
+ if( filedata )
+ {
+ float *wav = sfx_vorbis_stream( filedata, len, channels, samples );
+ free( filedata );
+ return wav;
+ }
+ else
+ {
+ vg_error( "OGG load failed\n" );
+ return NULL;
+ }
+}
+
+typedef struct sfx_bgload sfx_bgload_t;
+struct sfx_bgload
+{
+ char *path;
+ u32 channels;
+
+ float *buffer;
+ u32 samples;
+
+ void *user;
+
+ void(*OnComplete)(sfx_bgload_t *inf);
+};
+
+// Thread worker for background load job
+void *sfx_vorbis_a_t( void *_inf )
+{
+ sfx_bgload_t *info = _inf;
+
+ // Load the ogg clip
+ info->buffer = sfx_vorbis( info->path, info->channels, &info->samples );
+ info->OnComplete( info );
+
+ return NULL;
+}
+
+// Asynchronous resource load
+int sfx_vorbis_a( const char *path, int channels, void(*OnComplete)(sfx_bgload_t *inf), void *user )
+{
+ vg_info( "background job started for: %s\n", path );
+
+ sfx_bgload_t *params = malloc( sizeof( sfx_bgload_t ) );
+ params->path = malloc( strlen( path ) + 1 );
+ strcpy( params->path, path );
+ params->OnComplete = OnComplete;
+ params->user = user;
+ params->channels = channels;
+
+ return vg_thread_run( sfx_vorbis_a_t, params );
+}
+
+// Asynchronous load-to-system callback
+struct sfx_vorbis_a_to_inf
+{
+ sfx_system *sys;
+ u32 flags;
+};
+
+#define SFX_A_FLAG_AUTOSTART 0x1
+#define SFX_A_FLAG_AUTOFREE 0x2
+
+/*
+static int sfx_save( sfx_system *sys );
+
+// Asynchronous load-to-system callback
+void sfx_vorbis_a_to_c( sfx_bgload_t *loadinf )
+{
+ struct sfx_vorbis_a_to_inf *inf = loadinf->user;
+
+ // Mark buffer for deallocation if autofree is set
+ if( inf->flags & SFX_A_FLAG_AUTOFREE )
+ inf->sys->replacement = loadinf->buffer;
+ else
+ inf->sys->source = loadinf->buffer;
+
+ inf->sys->end = loadinf->samples;
+
+ if( inf->flags & SFX_A_FLAG_AUTOSTART )
+ sfx_save( inf->sys );
+
+ free( loadinf->path );
+ free( loadinf );
+ free( inf );
+}
+
+// Asynchronous vorbis load into audio system
+void sfx_vorbis_a_to( sfx_system *sys, const char *strFileName, int channels, u32 flags )
+{
+ struct sfx_vorbis_a_to_inf *inf = malloc( sizeof( struct sfx_vorbis_a_to_inf ) );
+ inf->flags = flags;
+ inf->sys = sys;
+
+ sys->ch = channels;
+
+ if( !sfx_vorbis_a( strFileName, channels, sfx_vorbis_a_to_c, inf ) )
+ free( inf );
+}*/
+
+// 0
+// ======================================================
+
+static int sfx_begin_edit( sfx_system *sys )
+{
+ MUTEX_LOCK( sfx_mux_t01 );
+
+ if( sfx_q_len >= SFX_MAX_SYSTEMS && !sys->in_queue )
+ {
+ MUTEX_UNLOCK( sfx_mux_t01 );
+ vg_warn( "Warning: No free space in sound queue\n" );
+ return 0;
+ }
+
+ return 1;
+}
+
+static void sfx_end_edit( sfx_system *sys )
+{
+ MUTEX_UNLOCK( sfx_mux_t01 );
+}
+
+// Mark change to be uploaded to queue system
+static int sfx_push( sfx_system *sys )
+{
+ if( !sys->in_queue )
+ {
+ // Mark change in queue
+ sfx_q[ sfx_q_len ++ ] = sys;
+ sys->in_queue = 1;
+ }
+
+ MUTEX_UNLOCK( sfx_mux_t01 );
+
+ return 1;
+}
+
+// Edit a volume float, has to be function wrapped because of mutex
+static void sfx_vol_fset( sfx_vol_control *src, float to )
+{
+ MUTEX_LOCK( sfx_mux_t01 );
+
+ src->val = to;
+
+ MUTEX_UNLOCK( sfx_mux_t01 );
+}
+
+// thread-safe get volume value
+static float sfx_vol_fget( sfx_vol_control *src )
+{
+ float val;
+
+ MUTEX_LOCK( sfx_mux_t01 );
+
+ val = src->val;
+
+ MUTEX_UNLOCK( sfx_mux_t01 );
+
+ return val;
+}
+
+// thread-safe set master volume
+static void sfx_set_master( float to )
+{
+ MUTEX_LOCK( sfx_mux_t01 );
+
+ g_master_volume = to;
+
+ MUTEX_UNLOCK( sfx_mux_t01 );
+}
+
+// thread-safe get master volume
+static float sfx_get_master(void)
+{
+ float val;
+
+ MUTEX_LOCK( sfx_mux_t01 );
+
+ val = g_master_volume;
+
+ MUTEX_UNLOCK( sfx_mux_t01 );
+
+ return val;
+}
+
+void audio_mixer_callback( ma_device *pDevice, void *pOutBuf, const void *pInput, ma_uint32 frameCount );
+
+// Miniaudio.h init
+static void vg_audio_init(void)
+{
+ g_aud_dconfig = ma_device_config_init( ma_device_type_playback );
+ g_aud_dconfig.playback.format = ma_format_f32;
+ g_aud_dconfig.playback.channels = 2;
+ g_aud_dconfig.sampleRate = 44100;
+ g_aud_dconfig.dataCallback = audio_mixer_callback;
+
+ g_aud_dconfig.pUserData = NULL;
+
+ vg_info( "Starting audio engine\n" );
+
+ if( ma_device_init( NULL, &g_aud_dconfig, &g_aud_device ) != MA_SUCCESS )
+ {
+ vg_exiterr( "ma_device failed to initialize" );
+ }
+ else
+ {
+ if( ma_device_start( &g_aud_device ) != MA_SUCCESS )
+ {
+ ma_device_uninit( &g_aud_device );
+ vg_exiterr( "ma_device failed to start" );
+ }
+ }
+}
+
+// Shutdown audio device
+static void vg_audio_free(void)
+{
+ ma_device_uninit( &g_aud_device );
+}
+
+// 1
+// ======================================================
+
+// Create and return slot for a sound
+static sfx_system *sfx_alloc(void)
+{
+ if( sfx_sys_len >= SFX_MAX_SYSTEMS )
+ return NULL;
+
+ // A conditional is done against this in localization step,
+ // Needs to be initialized.
+ sfx_sys[ sfx_sys_len ].source = NULL;
+
+ return sfx_sys + (sfx_sys_len++);
+}
+
+// Fetch samples into pcf
+static void audio_mixer_getsamples( float *pcf, float *source, u32 cur, u32 ch )
+{
+ if( ch == 2 )
+ {
+ pcf[0] = source[ cur*2+0 ];
+ pcf[1] = source[ cur*2+1 ];
+ }
+ else
+ {
+ pcf[0] = source[ cur ];
+ pcf[1] = source[ cur ];
+ }
+}
+
+// miniaudio.h interface
+void audio_mixer_callback( ma_device *pDevice, void *pOutBuf, const void *pInput, ma_uint32 frameCount )
+{
+ // Process incoming sound queue
+ MUTEX_LOCK( sfx_mux_t01 );
+
+ while( sfx_q_len --> 0 )
+ {
+ sfx_system *src = sfx_q[sfx_q_len];
+ sfx_system *clone;
+
+ src->in_queue = 0;
+
+ // Copy
+ clone = sfx_alloc();
+ *clone = *src;
+
+ // Links need to exist on persistent sounds
+ clone->persisitent_source = src->flags & SFX_FLAG_PERSISTENT? src: NULL;
+ }
+
+ sfx_q_len = 0;
+
+ // Volume modifiers
+ for( int i = 0; i < sfx_sys_len; i ++ )
+ {
+ sfx_system *sys = sfx_sys + i;
+
+ // Apply persistent volume if linked
+ if( sys->flags & SFX_FLAG_PERSISTENT )
+ {
+ sys->vol = sys->persisitent_source->vol * g_master_volume;
+
+ // Persistent triggers
+ // -------------------
+
+ // Fadeout effect ( + remove )
+ if( sys->persisitent_source->fadeout )
+ {
+ sys->fadeout_current = sys->persisitent_source->fadeout_current;
+ sys->fadeout = sys->persisitent_source->fadeout;
+
+ sys->persisitent_source = NULL;
+ sys->flags &= ~SFX_FLAG_PERSISTENT;
+ }
+ }
+
+ // Apply volume slider if it has one linked
+ if( sys->vol_src )
+ sys->cvol = sys->vol * sys->vol_src->val;
+ else
+ sys->cvol = sys->vol;
+ }
+
+ MUTEX_UNLOCK( sfx_mux_t01 );
+
+ // Clear buffer
+ float *pOut32F = (float *)pOutBuf;
+ for( int i = 0; i < frameCount * 2; i ++ ){
+ pOut32F[i] = 0.f;
+ }
+
+ for( int i = 0; i < sfx_sys_len; i ++ )
+ {
+ sfx_system *sys = sfx_sys + i;
+
+ u32 cursor = sys->cur, buffer_pos = 0;
+ float pcf[2] = { 0.f, 0.0f };
+
+ u32 frames_write = frameCount;
+ float fadeout_divisor = 1.0f / (float)sys->fadeout;
+
+ while( frames_write )
+ {
+ u32 samples_this_run = VG_MIN( frames_write, sys->end - cursor );
+
+ if( sys->fadeout )
+ {
+ // Force this system to be removed now
+ if( sys->fadeout_current == 0 )
+ {
+ sys->flags &= 0x00000000;
+ sys->cur = sys->end;
+ break;
+ }
+
+ samples_this_run = VG_MIN( samples_this_run, sys->fadeout_current );
+ }
+
+ for( u32 j = 0; j < samples_this_run; j ++ )
+ {
+ audio_mixer_getsamples( pcf, sys->source, cursor, sys->ch );
+
+ float vol = sys->vol;
+
+ if( sys->fadeout )
+ {
+ vol *= (float)sys->fadeout_current * fadeout_divisor;
+ sys->fadeout_current --;
+ }
+
+ if( buffer_pos >= frameCount )
+ {
+ break;
+ }
+
+ pOut32F[ buffer_pos*2+0 ] += pcf[0] * vol;
+ pOut32F[ buffer_pos*2+1 ] += pcf[1] * vol;
+
+ cursor ++;
+ buffer_pos ++;
+ }
+
+ frames_write -= samples_this_run;
+
+ if( sys->flags & SFX_FLAG_REPEAT )
+ {
+ if( frames_write )
+ {
+ cursor = 0;
+ continue;
+ }
+ }
+
+ sys->cur = cursor;
+ break;
+ }
+ }
+
+ // Redistribute sound systems
+ MUTEX_LOCK( sfx_mux_t01 );
+
+ u32 idx = 0, wr = 0;
+ while( idx != sfx_sys_len )
+ {
+ sfx_system *src = sfx_sys + idx;
+
+ // Keep only if cursor is before end or repeating
+ if( src->cur < src->end || (src->flags & SFX_FLAG_REPEAT) )
+ {
+ sfx_sys[ wr ++ ] = sfx_sys[ idx ];
+ }
+
+ idx ++ ;
+ }
+ sfx_sys_len = wr;
+
+ MUTEX_UNLOCK( sfx_mux_t01 );
+
+ (void)pInput;
+}
+
+// Load strings into sfx_set's memory
+// String layout: "sounda.ogg\0soundb.ogg\0soundc.ogg\0\0"
+static void sfx_set_strings( sfx_set *dest, char *strSources, u32 flags, int bAsync )
+{
+ dest->ch = (flags & SFX_FLAG_STEREO)? 2: 1;
+
+ dest->main = NULL;
+ dest->numsegments = 0;
+ char *source = strSources;
+
+ u32 total = 0;
+ int len;
+ while( (len = strlen( source )) )
+ {
+ u32 samples;
+ float *sound = sfx_vorbis( source, dest->ch, &samples );
+
+ if( !sound )
+ {
+ free( dest->main );
+ dest->numsegments = 0;
+ return;
+ }
+
+ total += samples;
+
+ float *nbuf = realloc( dest->main, total * dest->ch * sizeof(float) );
+
+ if( nbuf )
+ {
+ dest->main = nbuf;
+ memcpy( dest->main + (total-samples)*dest->ch, sound, samples*dest->ch*sizeof(float) );
+ free( sound );
+
+ dest->segments[ dest->numsegments*2+0 ] = total-samples;
+ dest->segments[ dest->numsegments*2+1 ] = total;
+ }
+ else
+ {
+ vg_error( "realloc() failed\n" );
+ free( sound );
+ return;
+ }
+
+ source += len +1;
+ dest->numsegments ++;
+ }
+}
+
+static void sfx_set_init( sfx_set *dest, char *sources )
+{
+ if( !sources )
+ sfx_set_strings( dest, dest->sources, dest->flags, 0 );
+ else
+ sfx_set_strings( dest, sources, dest->flags, 0 );
+}
+
+static void sfx_set_play( sfx_set *source, sfx_system *sys, int id )
+{
+ if( sfx_begin_edit( sys ) )
+ {
+ sys->fadeout = 0;
+ sys->fadeout_current = 0;
+ sys->source = source->main;
+ sys->cur = source->segments[ id*2 + 0 ];
+ sys->end = source->segments[ id*2 + 1 ];
+ sys->ch = source->ch;
+
+ // Diagnostics
+ sys->clip_start = sys->cur;
+ sys->clip_end = sys->end;
+ sys->buffer_length = source->segments[ (source->numsegments-1)*2 + 1 ];
+
+ sfx_push( sys );
+ }
+}
+
+// Pick a random sound from the buffer and play it into system
+static void sfx_set_playrnd( sfx_set *source, sfx_system *sys, int min_id, int max_id )
+{
+ if( !source->numsegments )
+ return;
+
+ if( max_id > source->numsegments )
+ {
+ vg_error( "Max ID out of range for playrnd\n" );
+ return;
+ }
+
+ int pick = (rand() % (max_id-min_id)) + min_id;
+
+ sfx_set_play( source, sys, pick );
+}
+
+static void sfx_system_fadeout( sfx_system *sys, u32 length_samples )
+{
+ if( sfx_begin_edit( sys ) )
+ {
+ sys->fadeout_current = length_samples;
+ sys->fadeout = length_samples;
+
+ sfx_end_edit( sys );
+ }
+}
+
+// Free set resources
+static void sfx_set_free( sfx_set *set )
+{
+ free( set->main );
+}
projects / vg.git / blobdiff