X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=projects%2Fbirds.c;h=81646be31a03396f387c5b3fce3852376ee54032;hb=e6f73232f1b16af430e850646215d2c9e07dde2e;hp=09de9f0169a367a4e45c48a35acfdc890fe05d8b;hpb=57e22e10bda788512d4503c7579d20b0bab1b2b4;p=vg.git diff --git a/projects/birds.c b/projects/birds.c index 09de9f0..81646be 100644 --- a/projects/birds.c +++ b/projects/birds.c @@ -3,16 +3,11 @@ #include "stdlib.h" #include "math.h" -/* Birds sounds - * TODO: THis can be embedded using 'song strings' in the path field of a sound - * entity for skaterift/vg. and the generation algorthm be placed in the - * decode section. will need to find a place to store its memory, though. - * - * */ +#define SYNTH_BIRD_STDLIB +#include "vg_audio_synth_bird.h" #define WRAP1S( X ) (X)%44100 - /* * clang birds.c -lm -o birds && ./birds | aplay -f cd /dev/stdin * @@ -27,76 +22,6 @@ * */ -//#define RANDOM_BIRD -//#define SINE_ACCURATE - -#ifdef SINE_ACCURATE -static float sine_44100_1( int o ) -{ - float t = (float)o*(1.0f/44100.0f); - return sinf(t*6.28318530717958647692528676655900576); -} - -static void sine_44100_4( int o[4], float v[4] ) -{ - v[0] = sine_44100_1( o[0] ); - v[1] = sine_44100_1( o[1] ); - v[2] = sine_44100_1( o[2] ); - v[3] = sine_44100_1( o[3] ); -} -#else - -/* sine functions over the range [0, 44100] : [-pi, pi]. - * Not accurate! */ - -static float sine_44100_1( int o ) -{ - float s = (o<22050)?-1.0f:1.0f; - float t = ((float)o*(1.0f/22050.0f))-1.0f - s*0.5f; - float t2 = t*t; - float t4 = t2*t2; - return s*(5.0f*t2-4.0f*t4-1.0f); -} - -static void sine_44100_4( int o[4], float v[4] ) -{ - float s[4],t[4],t2[4],t4[4]; - s[0] = (o[0]<22050)?-1.0f:1.0f; - s[1] = (o[1]<22050)?-1.0f:1.0f; - s[2] = (o[2]<22050)?-1.0f:1.0f; - s[3] = (o[3]<22050)?-1.0f:1.0f; - - t[0] = ((float)o[0]*(1.0f/22050.0f))-1.0f - s[0]*0.5f; - t[1] = ((float)o[1]*(1.0f/22050.0f))-1.0f - s[1]*0.5f; - t[2] = ((float)o[2]*(1.0f/22050.0f))-1.0f - s[2]*0.5f; - t[3] = ((float)o[3]*(1.0f/22050.0f))-1.0f - s[3]*0.5f; - - t2[0] = t[0]*t[0]; - t2[1] = t[1]*t[1]; - t2[2] = t[2]*t[2]; - t2[3] = t[3]*t[3]; - - t4[0] = t2[0]*t2[0]; - t4[1] = t2[1]*t2[1]; - t4[2] = t2[2]*t2[2]; - t4[3] = t2[3]*t2[3]; - - v[0] = s[0]*(5.0f*t2[0]-4.0f*t4[0]-1.0f); - v[1] = s[1]*(5.0f*t2[1]-4.0f*t4[1]-1.0f); - v[2] = s[2]*(5.0f*t2[2]-4.0f*t4[2]-1.0f); - v[3] = s[3]*(5.0f*t2[3]-4.0f*t4[3]-1.0f); -} -#endif - -static float saw_44100_1( int o ) -{ - float t = ((float)o*(1.0f/22050.0f))-1.0f, - tt = t*t, - ttt = tt*t; - - return -2.5f*ttt+2.5f*t; -} - static double rand_float( double min, double max ) { double r = (double)(rand()&(4096-1))*(1.0/4096.0); @@ -111,290 +36,72 @@ static int rand_seconds( double min, double max ) static void vg_dsp_init( void ); static void vg_dsp_process( float *stereo_in, float *stereo_out ); -struct synth_bird -{ - int harmonic_4[4], - fm_oscillator; - float poly; - int x,a,l,v, frame; - - int pattern_length; - struct synth_bird_signature - { - float c0, c1, c2, c3, length, pause; - - int lfo_hz; - float fm; /* lfo modulation depth (+/- hz) */ - } - pattern[]; -}; - -static int birdsynth_pattern_count_signatures( const char *pattern ) +static void write_profile( FILE *fp, struct synth_bird_settings *settings, + struct synth_bird_signature *pattern, + u32 pattern_count, const char *name ) { - /* {200,5000,1000,200,20,10,30,200}, {...} */ + struct synth_bird *bird = + synth_bird_create( settings, pattern, pattern_count ); - int signatures = 0; + u32 size = synth_bird_save_size( bird ); + char save[ size*2 ]; + synth_bird_save( bird, save ); - const char *c = pattern; - while( *c ) - { - if( *c == '{' ) - signatures ++; - - c ++; - } - - return signatures; + fprintf( fp, "%s:\n%.*s\n\n", name, size*2, save ); } -static void birdsynth_pattern_decode( struct synth_bird *bird, - const char *pattern ) -{ - bird->pattern_length = 0; +#define _PROFILE( FP, SETTINGS, ARRAY ) \ + write_profile( FP, SETTINGS, ARRAY, sizeof(ARRAY)/sizeof(ARRAY[0]), \ + #ARRAY ) - const char *c = pattern; - while( *c ) - { - if( *c == '{' ) - { - struct synth_bird_signature *sig = - &bird->pattern[ bird->pattern_length ++ ]; - - sig->c0 = 3000.0f; - sig->c1 = -800.0f; - sig->c2 = 1500.0f; - sig->c3 = -860.0f; - sig->length = 0.5f; - sig->pause = 0.1f; - sig->lfo_hz = 30; - sig->fm = 10.0f; +static void export_all_profiles(void) +{ + FILE *fp = fopen( "bird_profiles.txt", "w" ); -#if 0 - sscanf( c, "{%f,%f,%f,%f,%f,%f,%d,%f}", - &sig->c0, &sig->c1, &sig->c2, &sig->c3, - &sig->length, &sig->pause, &sig->lfo_hz, &sig->fm ); -#endif - } + struct synth_bird_settings *settings = &synth_bird__default_settings; - c ++; - } -} + _PROFILE( fp, settings, synth_bird__warbling_vireo ); + _PROFILE( fp, settings, synth_bird__pied_monarch ); + _PROFILE( fp, settings, synth_bird__bridled_honeyeater ); + _PROFILE( fp, settings, synth_bird__cricket ); + _PROFILE( fp, settings, synth_bird__gray_shrikethrush ); + _PROFILE( fp, settings, synth_bird__boobook ); + _PROFILE( fp, settings, synth_bird__shrike_tit ); -static struct synth_bird *birdsynth_malloc_create( const char *pattern ) -{ - int s = birdsynth_pattern_count_signatures( pattern ); - if( s == 0 ) - s = 1; - - struct synth_bird *bird = malloc( sizeof(struct synth_bird) + - s * sizeof(struct synth_bird_signature) ); - - birdsynth_pattern_decode( bird, pattern ); - - bird->harmonic_4[0] = 0; - bird->harmonic_4[1] = 0; - bird->harmonic_4[2] = 0; - bird->harmonic_4[3] = 0; - bird->fm_oscillator = 0; - bird->poly = 0.0f; - bird->x = 0; - bird->a = 1; - bird->l = bird->pattern[0].length * 44100.0f; - bird->v = 0; - bird->frame = 0; - - return bird; -} - -static void synthbird_generate_samples( struct synth_bird *bird, - float *stereo_buffer, int samples ) -{ - for( int _=0; _x ++; - if( bird->x >= bird->l ) - { - if( bird->a ) - { - bird->a = 0; - bird->l = bird->pattern[ bird->frame ].pause * 44100.0f; - } - else - { - bird->frame ++; - - if( bird->frame >= bird->pattern_length ) - bird->frame = 0; - - bird->a = 1; - bird->l = bird->pattern[ bird->frame ].length * 44100.0f; - } - - bird->x = 0; - } - - if( bird->a ) - { - bird->v += 40; - if( bird->v > 44100 ) bird->v = 44100; - } - else - { - bird->v -= 40; - if( bird->v < 0 ) bird->v = 0; - } - - struct synth_bird_signature *sig = &bird->pattern[ bird->frame ]; - - sig->c0 = 3000.0f; - sig->c1 = -800.0f; - sig->c2 = 1500.0f; - sig->c3 = -860.0f; - sig->length = 0.5f; - sig->pause = 0.1f; - sig->lfo_hz = 30; - sig->fm = 10.0f; - float level = bird->v; - level *= (1.0f/44100.0f); - - if( bird->a ) - { - float t = ((float)bird->x * (1.0f/(float)bird->l))*2.0f - 1.0f, - tt = t*t, - ttt = tt*t; - - bird->poly = sig->c0 + t*sig->c1 + tt*sig->c2 + ttt*sig->c3; - } - - bird->fm_oscillator = WRAP1S( bird->fm_oscillator + sig->lfo_hz ); - float fm = sine_44100_1( bird->fm_oscillator ) * sig->fm; - - int freq = bird->poly + fm; - bird->harmonic_4[0] = WRAP1S( bird->harmonic_4[0] + freq*1 ); - bird->harmonic_4[1] = WRAP1S( bird->harmonic_4[1] + freq*2 ); - bird->harmonic_4[2] = WRAP1S( bird->harmonic_4[2] + freq*3 ); - bird->harmonic_4[3] = WRAP1S( bird->harmonic_4[3] + freq*4 ); - - float v[4]; - sine_44100_4( bird->harmonic_4, v ); - float s = v[0] + - v[1] * 0.5f + - v[2] * 0.25f + - v[3] * 0.125f; - - s *= level; - - stereo_buffer[ _*2+0 ] = s; - stereo_buffer[ _*2+1 ] = s; - } + fclose( fp ); } int main( int argc, char *argv[] ) { vg_dsp_init(); -#if RANDOM_BIRD - int f0=4500, o1=0, f1=30; - int adsr=0; - - int o0[4]={0,0,0,0}; - - float c0=0.0f, c1=0.0f, c2=0.0f, c3=0.0f; /* signature coefficients */ - int l=44100/2, /* length of thing */ - x=0, /* frame of thing */ - a=0; /* 0: silence 1: signature */ - - float poly=0.0f; - - for(int _=0;_<44100*30;_++){ - x ++; - if( x >= l ){ /* do new thing */ - if( a ){ - int retrigger = rand() % 4; - a=0; - if( retrigger ) l=rand_seconds(0.03,0.1); - else l=rand_seconds(0.5,10.0); - } - else{ - c0=rand_float(-1.0,1.0); - c1=rand_float(-1.0,1.0); - c2=rand_float(-0.1,0.1); - c3=rand_float(-0.5,1.5); - l=rand_seconds(0.05,0.5); - a=1; - } - x=0; - } - - if(a){ - adsr += 40; - if( adsr > 44100 ) adsr = 44100; - } - else{ - adsr -= 40; - if( adsr < 0 ) adsr = 0; - } - - o1 += f1; - o1 = o1 % 44100; - - float s1 = sine_44100_1( o1 ); - float level = adsr; - level *= (1.0f/44100.0f); - - if( a ) - { - float t = ((float)x * (1.0f/(float)l))*2.0f - 1.0f, - tt = t*t, - ttt = tt*t; - - poly = c0+t*c1+tt*c2+ttt*c3; - } - - int fm = s1*100.0f*(1.0f+poly*0.5f) + poly*500.0f; - - int ff = f0+fm; - o0[0] = WRAP1S( o0[0] + ff*1 ); - o0[1] = WRAP1S( o0[1] + ff*2 ); - o0[2] = WRAP1S( o0[2] + ff*3 ); - o0[3] = WRAP1S( o0[3] + ff*4 ); - - float v[4]; - sine_44100_4( o0, v ); - float s0 = v[0] + - v[1] * 0.5f + - v[2] * 0.25f + - v[3] * 0.125f; - s0 *= level; - - float stereo[2] = { s0, s0 }; - vg_dsp_process( stereo, stereo ); + export_all_profiles(); - int16_t l = stereo[0] * 10000.0f, - r = stereo[1] * 10000.0f; + struct synth_bird *warbling_vireo = + synth_bird_create( &synth_bird__default_settings, + synth_bird__warbling_vireo, + sizeof(synth_bird__warbling_vireo)/ + sizeof(struct synth_bird_signature) ); - fwrite( &l, 2,1, stdout ); - fwrite( &r, 2,1, stdout ); - } -#else + for(;;){ + float stereo[2] = { 0.0f, 0.0f }; - struct synth_bird *bird = birdsynth_malloc_create( "" ); + float b[2]; + + synth_bird_generate_samples( warbling_vireo, b, 1 ); + stereo[0] += b[0]; + stereo[1] += b[1]; - for(int _=0;_<44100*60;_++){ - float stereo[2] = { 0.0f, 0.0f }; - - synthbird_generate_samples( bird, stereo, 1 ); #if 0 vg_dsp_process( stereo, stereo ); #endif - int16_t l = stereo[0] * 10000.0f, - r = stereo[1] * 10000.0f; + int16_t l = stereo[0] * 14000.0f, + r = stereo[1] * 14000.0f; fwrite( &l, 2,1, stdout ); fwrite( &r, 2,1, stdout ); } -#endif } @@ -498,7 +205,9 @@ static inline void dsp_process_schroeder( struct dsp_schroeder *sch, } /* temporary global design */ -static struct dsp_lpf __lpf_mud_free; +static struct dsp_lpf __lpf_mud_free, + __hpf_mud_free; + static struct dsp_delay __echos[8]; static struct dsp_lpf __echos_lpf[8]; static struct dsp_schroeder __diffusion_chain[8]; @@ -514,11 +223,12 @@ static void vg_dsp_init( void ) dsp_init_lpf( &__lpf_mud_free, 125.0f ); + dsp_init_lpf( &__hpf_mud_free, 500.0f ); float sizes[] = { 2.0f, 4.0f, 8.0f, 16.0f, 32.0f, 64.0f, 128.0f, 256.0f }; - float reflection_variance = 0.1f; + float reflection_variance = 0.04f; for( int i=0; i<8; i++ ) { @@ -538,7 +248,7 @@ static void vg_dsp_init( void ) for( int i=0; i<8; i++ ) { - dsp_init_schroeder( __diffusion_chain+i, diffusions[i]/1000.0f, 0.8f ); + dsp_init_schroeder( __diffusion_chain+i, diffusions[i]/1000.0f, 0.7f ); } } @@ -557,7 +267,7 @@ static void vg_dsp_process( float *stereo_in, float *stereo_out ) dsp_write_lpf( __echos_lpf+i, &echo ); dsp_read_lpf( __echos_lpf+i, &echo ); - recieved += echo * echo_tunings[i]*0.997; + recieved += echo * echo_tunings[i]*0.9; } float diffused = recieved; @@ -567,7 +277,10 @@ static void vg_dsp_process( float *stereo_in, float *stereo_out ) dsp_process_schroeder( __diffusion_chain+i, &diffused, &diffused ); } - float total = in_total + (diffused*0.1f + recieved*0.9f); + float total = in_total + (diffused*0.5f + recieved*0.5f); + + dsp_write_lpf( &__hpf_mud_free, &total ); + dsp_read_lpf( &__hpf_mud_free, &total ); float low_mud; dsp_write_lpf( &__lpf_mud_free, &total ); @@ -578,9 +291,9 @@ static void vg_dsp_process( float *stereo_in, float *stereo_out ) for( int i=0; i<8; i++ ) dsp_write_delay( __echos+i, &total ); - stereo_out[0] = stereo_in[0]*0.25f; - stereo_out[1] = stereo_in[1]*0.25f; - stereo_out[0] += diffused*0.5f+recieved*0.9f; - stereo_out[1] += diffused*0.5f+recieved*0.9f; + stereo_out[0] = stereo_in[0]*0.5f; + stereo_out[1] = stereo_in[1]*0.5f; + stereo_out[0] += diffused*0.8f+recieved*0.9f; + stereo_out[1] += diffused*0.8f+recieved*0.9f; }