static VoiceOp RT_play_voice(const Data *data, const Voice *voice, const int num_frames, float *destination){
int start_writing_pos = 0;
int end_writing_pos = num_frames;
const int delta_pos_at_start = voice->delta_pos_at_start;
const int delta_pos_at_end = voice->delta_pos_at_end;
VoiceOp ret = VOICE_KEEP;
if (delta_pos_at_start==0 && delta_pos_at_end==-1){
// 1. continue playing;
int num_consumed_frames = RT_get_resampled_data(voice, destination, num_frames);
if (num_consumed_frames < num_frames) {
end_writing_pos = num_consumed_frames;
ret = VOICE_REMOVE;
}
}else if (delta_pos_at_start>0 && delta_pos_at_end==-1){
// 2. start playing (without end playing)
start_writing_pos = delta_pos_at_start;
int new_num_frames = num_frames - delta_pos_at_start;
int num_consumed_frames = RT_get_resampled_data(voice, destination, new_num_frames);
if (num_consumed_frames < new_num_frames){
end_writing_pos = start_writing_pos + num_consumed_frames;
ret = VOICE_REMOVE;
}
}else{
// 3. end playing
R_ASSERT_RETURN_IF_FALSE2(delta_pos_at_end>=0, VOICE_REMOVE);
R_ASSERT_RETURN_IF_FALSE2(delta_pos_at_end>=delta_pos_at_start, VOICE_REMOVE);
int new_num_frames = delta_pos_at_end - delta_pos_at_start;
int num_consumed_frames = RT_get_resampled_data(voice, destination+delta_pos_at_start, new_num_frames);
start_writing_pos = delta_pos_at_start;
end_writing_pos = delta_pos_at_start+num_consumed_frames;
ret = VOICE_REMOVE;
}
if (start_writing_pos > 0)
memset(destination, 0, start_writing_pos*sizeof(float));
if (end_writing_pos < num_frames)
memset(destination+end_writing_pos, 0, (num_frames-end_writing_pos)*sizeof(float));
return ret;
}
static bool RT_play_voice(Data *data, Voice *voice, int num_frames_to_produce, float **outputs){
int startpos = voice->delta_pos_at_start;
int endpos = voice->delta_pos_at_end;
if(startpos>=0)
voice->delta_pos_at_start = 0;
if(endpos>=0)
voice->delta_pos_at_end = -1;
if(endpos>=0 && endpos<startpos) // Should not happen. Test for it just in case. It's a bit messy when notes are generated by the keyboard, player and other places at the same time.
{
printf("Oops. Endpos: %d. startpos: %d\n",endpos,startpos);
return false;
}
float resampled_data[num_frames_to_produce-startpos];
int frames_created_by_resampler = RT_get_resampled_data(data,voice,resampled_data,num_frames_to_produce-startpos);
//printf("Frames created by resampler: %d\n",frames_created_by_resampler);
//printf("peak: %f\n",get_peak(resampled_data,frames_created_by_resampler));
int frames_created_by_envelope;
float *adsr_sound_data[1]={&resampled_data[0]};
if(endpos>=0){
int pre_release_len = endpos-startpos;
//printf("********** endpos>0: %d. prelen: %d, frames_created_by_resampler: %d\n",endpos,prelen,frames_created_by_resampler);
if(frames_created_by_resampler <= pre_release_len){ // i.e. we reached the end of sound before beginning to release the ADSR envelope.
frames_created_by_envelope = ADSR_apply(voice->adsr, adsr_sound_data, 1, frames_created_by_resampler);
}else{
frames_created_by_envelope = ADSR_apply(voice->adsr, adsr_sound_data, 1, pre_release_len);
//printf("************************ Calling adsr release\n");
ADSR_release(voice->adsr);
int post_release_len = frames_created_by_resampler - frames_created_by_envelope;
adsr_sound_data[0] = &resampled_data[frames_created_by_envelope];
frames_created_by_envelope += ADSR_apply(voice->adsr, adsr_sound_data, 1, post_release_len);
}
}else{
frames_created_by_envelope = ADSR_apply(voice->adsr, adsr_sound_data, 1, frames_created_by_resampler);
//printf("Frames created by envelope: %d, peak: %f\n",frames_created_by_envelope,get_peak(resampled_data,frames_created_by_envelope));
//printf("peak: %f\n",get_peak(resampled_data,frames_created_by_resampler));
}
//float peak_in = get_peak(resampled_data,frames_created_by_envelope);
const Sample *sample = voice->sample;
#define mix(input_channel, output_channel) do{ \
float panval = voice->pan.vals[input_channel][output_channel]; \
if(panval>0.0f){ \
float *out = outputs[output_channel] + startpos; \
float start_volume = voice->start_volume*panval; \
float end_volume = voice->end_volume*panval; \
SMOOTH_mix_sounds_raw(out, resampled_data, frames_created_by_envelope, start_volume, end_volume); \
} \
}while(0)
if(sample->ch == -1){
mix(0,0);
mix(0,1);
}else{
mix(sample->ch,0);
mix(sample->ch,1);
}
//printf("peak in/out: %.3f - %.3f\n",peak_in,get_peak(outputs[0], num_frames_to_produce));
voice->start_volume = voice->end_volume;
voice->start_pitch = voice->end_pitch;
if(startpos+frames_created_by_envelope < num_frames_to_produce)
return true;
else
return false;
}
