Formatting
This commit is contained in:
neauoire
parent
c4ec4a6340
commit
87d6798593
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@ -19,42 +19,44 @@ WITH REGARD TO THIS SOFTWARE.
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#define INTERPOL_METHOD 1
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typedef enum EnvStage {
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ENV_ATTACK = (1 << 0),
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ENV_DECAY = (1 << 1),
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ENV_SUSTAIN = (1 << 2),
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ENV_RELEASE = (1 << 3),
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ENV_ATTACK = (1 << 0),
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ENV_DECAY = (1 << 1),
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ENV_SUSTAIN = (1 << 2),
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ENV_RELEASE = (1 << 3),
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} EnvStage;
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typedef struct Envelope {
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float a;
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float d;
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float s;
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float r;
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float vol;
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EnvStage stage;
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float a;
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float d;
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float s;
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float r;
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float vol;
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EnvStage stage;
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} Envelope;
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typedef struct Sample {
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Uint8 *data;
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float len;
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float pos;
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float inc;
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float loop;
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Uint8 pitch;
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Envelope env;
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Uint8 *data;
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float len;
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float pos;
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float inc;
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float loop;
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Uint8 pitch;
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Envelope env;
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} Sample;
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typedef struct AudioChannel {
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Sample sample;
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Sample next_sample;
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bool xfade;
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float duration;
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float vol_l;
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float vol_r;
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Sample sample;
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Sample next_sample;
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bool xfade;
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float duration;
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float vol_l;
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float vol_r;
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} AudioChannel;
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AudioChannel channel[POLYPHONY];
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/* clang-format off */
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const float tuning[109] = {
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0.00058853f, 0.00062352f, 0.00066060f, 0.00069988f, 0.00074150f,
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0.00078559f, 0.00083230f, 0.00088179f, 0.00093423f, 0.00098978f,
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@ -80,236 +82,247 @@ const float tuning[109] = {
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0.25338348f, 0.26845044f, 0.28441334f, 0.30132544f,
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};
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/* clang-format on */
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void
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env_on(Envelope *env) {
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env->stage = ENV_ATTACK;
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env->vol = 0.0f;
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if (env->a > 0) {
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env->a = (SOUND_TIMER / AUDIO_BUFSIZE) / env->a;
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} else if (env->stage == ENV_ATTACK) {
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env->stage = ENV_DECAY;
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env->vol = 1.0f;
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}
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if (env->d < 10.0f) {
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env->d = 10.0f;
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}
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env->d = (SOUND_TIMER / AUDIO_BUFSIZE) / env->d;
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if (env->r < 10.0f) {
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env->r = 10.0f;
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}
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env->r = (SOUND_TIMER / AUDIO_BUFSIZE) / env->r;
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env_on(Envelope *env)
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{
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env->stage = ENV_ATTACK;
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env->vol = 0.0f;
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if(env->a > 0) {
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env->a = (SOUND_TIMER / AUDIO_BUFSIZE) / env->a;
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} else if(env->stage == ENV_ATTACK) {
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env->stage = ENV_DECAY;
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env->vol = 1.0f;
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}
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if(env->d < 10.0f) {
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env->d = 10.0f;
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}
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env->d = (SOUND_TIMER / AUDIO_BUFSIZE) / env->d;
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if(env->r < 10.0f) {
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env->r = 10.0f;
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}
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env->r = (SOUND_TIMER / AUDIO_BUFSIZE) / env->r;
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}
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void
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env_off(Envelope *env) {
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env->stage = ENV_RELEASE;
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env_off(Envelope *env)
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{
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env->stage = ENV_RELEASE;
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}
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void
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note_on(AudioChannel *channel, Uint16 duration, Uint8 *data, Uint16 len, Uint8 vol,
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Uint8 attack, Uint8 decay, Uint8 sustain, Uint8 release, Uint8 pitch, bool loop) {
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channel->duration = duration > 0 ? duration : len / 44.1f;
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channel->vol_l = (vol >> 4) / 15.0f;
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channel->vol_r = (vol & 0xf) / 15.0f;
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note_on(AudioChannel *channel, Uint16 duration, Uint8 *data, Uint16 len, Uint8 vol, Uint8 attack, Uint8 decay, Uint8 sustain, Uint8 release, Uint8 pitch, bool loop)
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{
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channel->duration = duration > 0 ? duration : len / 44.1f;
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channel->vol_l = (vol >> 4) / 15.0f;
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channel->vol_r = (vol & 0xf) / 15.0f;
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Sample sample = {0};
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sample.data = data;
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sample.len = len;
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sample.pos = 0;
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sample.env.a = attack * 64.0f;
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sample.env.d = decay * 64.0f;
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sample.env.s = sustain / 16.0f;
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sample.env.r = release * 64.0f;
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if (loop) {
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sample.loop = len;
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} else {
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sample.loop = 0;
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}
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env_on(&sample.env);
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if (pitch < 20) {
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pitch = 20;
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}
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float sample_rate = 44100 / 261.60;
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if (len <= 256) {
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sample_rate = len;
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}
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const float *inc = &tuning[pitch - 20];
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sample.inc = *(inc) * sample_rate;
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Sample sample = {0};
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sample.data = data;
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sample.len = len;
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sample.pos = 0;
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sample.env.a = attack * 64.0f;
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sample.env.d = decay * 64.0f;
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sample.env.s = sustain / 16.0f;
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sample.env.r = release * 64.0f;
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if(loop) {
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sample.loop = len;
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} else {
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sample.loop = 0;
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}
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env_on(&sample.env);
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if(pitch < 20) {
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pitch = 20;
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}
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float sample_rate = 44100 / 261.60;
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if(len <= 256) {
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sample_rate = len;
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}
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const float *inc = &tuning[pitch - 20];
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sample.inc = *(inc)*sample_rate;
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channel->next_sample = sample;
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channel->xfade = true;
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channel->next_sample = sample;
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channel->xfade = true;
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}
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void
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note_off(AudioChannel *channel, Uint16 duration) {
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channel->duration = duration;
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env_off(&channel->sample.env);
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note_off(AudioChannel *channel, Uint16 duration)
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{
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channel->duration = duration;
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env_off(&channel->sample.env);
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}
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void
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env_advance(Envelope *env) {
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switch (env->stage) {
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case ENV_ATTACK: {
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env->vol += env->a;
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if (env->vol >= 1.0f) {
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env->stage = ENV_DECAY;
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env->vol = 1.0f;
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}
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} break;
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case ENV_DECAY: {
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env->vol -= env->d;
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if (env->vol <= env->s || env->d <= 0) {
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env->stage = ENV_SUSTAIN;
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env->vol = env->s;
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}
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} break;
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case ENV_SUSTAIN: {
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env->vol = env->s;
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} break;
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case ENV_RELEASE: {
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if (env->vol <= 0 || env->r <= 0) {
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env->vol = 0;
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} else {
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env->vol -= env->r;
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}
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} break;
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}
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env_advance(Envelope *env)
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{
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switch(env->stage) {
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case ENV_ATTACK: {
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env->vol += env->a;
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if(env->vol >= 1.0f) {
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env->stage = ENV_DECAY;
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env->vol = 1.0f;
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}
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} break;
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case ENV_DECAY: {
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env->vol -= env->d;
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if(env->vol <= env->s || env->d <= 0) {
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env->stage = ENV_SUSTAIN;
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env->vol = env->s;
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}
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} break;
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case ENV_SUSTAIN: {
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env->vol = env->s;
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} break;
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case ENV_RELEASE: {
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if(env->vol <= 0 || env->r <= 0) {
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env->vol = 0;
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} else {
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env->vol -= env->r;
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}
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} break;
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}
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}
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float
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interpolate_sample(Uint8 *data, Uint16 len, float pos) {
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interpolate_sample(Uint8 *data, Uint16 len, float pos)
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{
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#if INTERPOL_METHOD == 0
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return data[(int)pos];
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return data[(int)pos];
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#elif INTERPOL_METHOD == 1
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float x = pos;
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int x0 = (int)x;
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int x1 = (x0 + 1);
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float y0 = data[x0];
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float y1 = data[x1 % len];
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x = x - x0;
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float y = y0 + x * (y1 - y0);
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return y;
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float x = pos;
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int x0 = (int)x;
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int x1 = (x0 + 1);
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float y0 = data[x0];
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float y1 = data[x1 % len];
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x = x - x0;
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float y = y0 + x * (y1 - y0);
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return y;
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#elif INTERPOL_METHOD == 2
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float x = pos;
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int x0 = x - 1;
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int x1 = x;
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int x2 = x + 1;
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int x3 = x + 2;
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float y0 = data[x0 % len];
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float y1 = data[x1];
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float y2 = data[x2 % len];
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float y3 = data[x3 % len];
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x = x - x1;
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float c0 = y1;
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float c1 = 0.5f * (y2 - y0);
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float c2 = y0 - 2.5f * y1 + 2.f * y2 - 0.5f * y3;
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float c3 = 1.5f * (y1 - y2) + 0.5f * (y3 - y0);
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return ((c3 * x + c2) * x + c1) * x + c0;
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float x = pos;
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int x0 = x - 1;
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int x1 = x;
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int x2 = x + 1;
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int x3 = x + 2;
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float y0 = data[x0 % len];
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float y1 = data[x1];
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float y2 = data[x2 % len];
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float y3 = data[x3 % len];
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x = x - x1;
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float c0 = y1;
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float c1 = 0.5f * (y2 - y0);
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float c2 = y0 - 2.5f * y1 + 2.f * y2 - 0.5f * y3;
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float c3 = 1.5f * (y1 - y2) + 0.5f * (y3 - y0);
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return ((c3 * x + c2) * x + c1) * x + c0;
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#endif
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}
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Sint16
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next_sample(Sample *sample) {
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if (sample->pos >= sample->len) {
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if (sample->loop == 0) {
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sample->data = 0;
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return 0;
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}
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while (sample->pos >= sample->len) {
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sample->pos -= sample->loop;
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}
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}
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next_sample(Sample *sample)
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{
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if(sample->pos >= sample->len) {
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if(sample->loop == 0) {
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sample->data = 0;
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return 0;
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}
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while(sample->pos >= sample->len) {
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sample->pos -= sample->loop;
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}
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}
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float val = interpolate_sample(sample->data, sample->len, sample->pos);
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val *= sample->env.vol;
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Sint8 next = (Sint8)0x80 ^ (Uint8)val;
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float val = interpolate_sample(sample->data, sample->len, sample->pos);
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val *= sample->env.vol;
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Sint8 next = (Sint8)0x80 ^ (Uint8)val;
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sample->pos += sample->inc;
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env_advance(&sample->env);
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return next;
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sample->pos += sample->inc;
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env_advance(&sample->env);
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return next;
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}
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void
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audio_handler(void *ctx, Uint8 *out_stream, int len) {
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Sint16 *stream = (Sint16 *)out_stream;
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memset(stream, 0x00, len);
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audio_handler(void *ctx, Uint8 *out_stream, int len)
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{
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Sint16 *stream = (Sint16 *)out_stream;
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memset(stream, 0x00, len);
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int n;
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for (n = 0; n < POLYPHONY; n++) {
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Uint8 device = (3 + n) << 4;
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Uxn *u = (Uxn *)ctx;
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Uint8 *addr = &u->dev[device];
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if (channel[n].duration <= 0 && PEEK2(addr)) {
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int n;
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for(n = 0; n < POLYPHONY; n++) {
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Uint8 device = (3 + n) << 4;
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Uxn *u = (Uxn *)ctx;
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Uint8 *addr = &u->dev[device];
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if(channel[n].duration <= 0 && PEEK2(addr)) {
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uxn_eval(u, PEEK2(addr));
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}
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channel[n].duration -= SOUND_TIMER;
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}
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channel[n].duration -= SOUND_TIMER;
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int x = 0;
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if (channel[n].xfade) {
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float delta = 1.0f / (XFADE_SAMPLES * 2);
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while (x < XFADE_SAMPLES * 2) {
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float alpha = x * delta;
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float beta = 1.0f - alpha;
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Sint16 next_a = next_sample(&channel[n].next_sample);
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Sint16 next_b = 0;
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if (channel[n].sample.data != 0) {
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next_b = next_sample(&channel[n].sample);
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}
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Sint16 next = alpha * next_a + beta * next_b;
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stream[x++] += next * channel[n].vol_l;
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stream[x++] += next * channel[n].vol_r;
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}
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channel[n].sample = channel[n].next_sample;
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channel[n].xfade = false;
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}
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Sample *sample = &channel[n].sample;
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while (x < len / 2) {
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if (sample->data == 0) {
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break;
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}
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Sint16 next = next_sample(sample);
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stream[x++] += next * channel[n].vol_l;
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stream[x++] += next * channel[n].vol_r;
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}
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}
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int i;
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for (i = 0; i < len / 2; i++) {
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stream[i] <<= 6;
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}
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int x = 0;
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if(channel[n].xfade) {
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float delta = 1.0f / (XFADE_SAMPLES * 2);
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while(x < XFADE_SAMPLES * 2) {
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float alpha = x * delta;
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float beta = 1.0f - alpha;
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Sint16 next_a = next_sample(&channel[n].next_sample);
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Sint16 next_b = 0;
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if(channel[n].sample.data != 0) {
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next_b = next_sample(&channel[n].sample);
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}
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Sint16 next = alpha * next_a + beta * next_b;
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stream[x++] += next * channel[n].vol_l;
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stream[x++] += next * channel[n].vol_r;
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}
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channel[n].sample = channel[n].next_sample;
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channel[n].xfade = false;
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}
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Sample *sample = &channel[n].sample;
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while(x < len / 2) {
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if(sample->data == 0) {
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break;
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}
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Sint16 next = next_sample(sample);
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stream[x++] += next * channel[n].vol_l;
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stream[x++] += next * channel[n].vol_r;
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}
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}
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int i;
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for(i = 0; i < len / 2; i++) {
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stream[i] <<= 6;
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}
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}
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void
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audio_start(int idx, Uint8 *d, Uxn *u)
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{
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Uint16 duration = PEEK2(d + 0x5);
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Uint8 off = d[0xf] == 0x00;
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Uint16 duration = PEEK2(d + 0x5);
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Uint8 off = d[0xf] == 0x00;
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if (!off) {
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Uint16 addr = PEEK2(d + 0xc);
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Uint8 *data = &u->ram[addr];
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Uint16 len = PEEK2(d + 0xa);
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Uint8 volume = d[0xe];
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bool loop = !(d[0xf] & 0x80);
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Uint8 pitch = d[0xf] & 0x7f;
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Uint16 adsr = PEEK2(d + 0x8);
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Uint8 attack = (adsr >> 12) & 0xF;
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Uint8 decay = (adsr >> 8) & 0xF;
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Uint8 sustain = (adsr >> 4) & 0xF;
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Uint8 release = (adsr >> 0) & 0xF;
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note_on(&channel[idx], duration, data, len, volume, attack, decay, sustain, release, pitch, loop);
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} else {
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note_off(&channel[idx], duration);
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}
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if(!off) {
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Uint16 addr = PEEK2(d + 0xc);
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Uint8 *data = &u->ram[addr];
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Uint16 len = PEEK2(d + 0xa);
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Uint8 volume = d[0xe];
|
||||
bool loop = !(d[0xf] & 0x80);
|
||||
Uint8 pitch = d[0xf] & 0x7f;
|
||||
Uint16 adsr = PEEK2(d + 0x8);
|
||||
Uint8 attack = (adsr >> 12) & 0xF;
|
||||
Uint8 decay = (adsr >> 8) & 0xF;
|
||||
Uint8 sustain = (adsr >> 4) & 0xF;
|
||||
Uint8 release = (adsr >> 0) & 0xF;
|
||||
note_on(&channel[idx], duration, data, len, volume, attack, decay, sustain, release, pitch, loop);
|
||||
} else {
|
||||
note_off(&channel[idx], duration);
|
||||
}
|
||||
}
|
||||
|
||||
Uint8
|
||||
audio_get_vu(int instance) {
|
||||
return channel[instance].sample.env.vol * 255.0f;
|
||||
audio_get_vu(int instance)
|
||||
{
|
||||
return channel[instance].sample.env.vol * 255.0f;
|
||||
}
|
||||
|
||||
Uint16
|
||||
audio_get_position(int instance) {
|
||||
return channel[instance].sample.pos;
|
||||
audio_get_position(int instance)
|
||||
{
|
||||
return channel[instance].sample.pos;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -64,7 +64,7 @@ emu_end(Uxn *u)
|
|||
int
|
||||
main(int argc, char **argv)
|
||||
{
|
||||
Uint8 dev[0x100] = {0};
|
||||
Uint8 dev[0x100] = {0};
|
||||
Uxn u;
|
||||
u.dev = (Uint8 *)&dev;
|
||||
int i = 1;
|
||||
|
|
|
|||
40
src/uxnemu.c
40
src/uxnemu.c
|
|
@ -70,20 +70,20 @@ clamp(int v, int min, int max)
|
|||
static Uint8
|
||||
audio_dei(int instance, Uint8 *d, Uint8 port)
|
||||
{
|
||||
switch(port) {
|
||||
case 0x2:
|
||||
return audio_get_position(instance) >> 8;
|
||||
case 0x3:
|
||||
return audio_get_position(instance);
|
||||
case 0x4:
|
||||
return audio_get_vu(instance);
|
||||
case 0x0:
|
||||
case 0x8:
|
||||
case 0xa:
|
||||
case 0xc: return PEEK2(d + port);
|
||||
default: return d[port];
|
||||
}
|
||||
return d[port];
|
||||
switch(port) {
|
||||
case 0x2:
|
||||
return audio_get_position(instance) >> 8;
|
||||
case 0x3:
|
||||
return audio_get_position(instance);
|
||||
case 0x4:
|
||||
return audio_get_vu(instance);
|
||||
case 0x0:
|
||||
case 0x8:
|
||||
case 0xa:
|
||||
case 0xc: return PEEK2(d + port);
|
||||
default: return d[port];
|
||||
}
|
||||
return d[port];
|
||||
}
|
||||
|
||||
static void
|
||||
|
|
@ -94,7 +94,7 @@ audio_deo(int instance, Uint8 *d, Uint8 port, Uxn *u)
|
|||
SDL_LockAudioDevice(audio_id);
|
||||
audio_start(instance, d, u);
|
||||
SDL_UnlockAudioDevice(audio_id);
|
||||
SDL_PauseAudioDevice(audio_id, 0);
|
||||
SDL_PauseAudioDevice(audio_id, 0);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -271,7 +271,7 @@ emu_init(Uxn *u)
|
|||
deadline_interval = ms_interval * TIMEOUT_MS;
|
||||
exec_deadline = SDL_GetPerformanceCounter() + deadline_interval;
|
||||
screen_resize(WIDTH, HEIGHT);
|
||||
SDL_PauseAudioDevice(audio_id, 1);
|
||||
SDL_PauseAudioDevice(audio_id, 1);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
|
@ -514,7 +514,7 @@ emu_run(Uxn *u, char *rom)
|
|||
static int
|
||||
emu_end(Uxn *u)
|
||||
{
|
||||
SDL_CloseAudioDevice(audio_id);
|
||||
SDL_CloseAudioDevice(audio_id);
|
||||
#ifdef _WIN32
|
||||
#pragma GCC diagnostic ignored "-Wint-to-pointer-cast"
|
||||
TerminateThread((HANDLE)SDL_GetThreadID(stdin_thread), 0);
|
||||
|
|
@ -529,7 +529,7 @@ emu_end(Uxn *u)
|
|||
int
|
||||
main(int argc, char **argv)
|
||||
{
|
||||
Uint8 dev[0x100] = {0};
|
||||
Uint8 dev[0x100] = {0};
|
||||
Uxn u = {0};
|
||||
Uxn u_audio = {0};
|
||||
u.dev = (Uint8 *)&dev;
|
||||
|
|
@ -555,10 +555,10 @@ main(int argc, char **argv)
|
|||
char *rom = argv[i++];
|
||||
if(!system_init(&u, ram, rom)) {
|
||||
return system_error("Init", "Failed to initialize uxn.");
|
||||
}
|
||||
}
|
||||
if(!system_init(&u_audio, ram, rom)) {
|
||||
return system_error("Init", "Failed to initialize uxn.");
|
||||
}
|
||||
}
|
||||
if(!emu_init(&u_audio))
|
||||
return system_error("Init", "Failed to initialize varvara.");
|
||||
/* Game Loop */
|
||||
|
|
|
|||
Loading…
Reference in New Issue