Esempi in C++ (Cpp) per ymf278b_compute_rate

Esempio n. 1

static void ymf278b_envelope_next(YMF278BSlot *slot, float clock_ratio)
{
	if(slot->env_step == 0)
	{
		// Attack
		slot->env_vol = (256U << 23) - 1;
		slot->env_vol_lim = 256U<<23;
#ifdef VERBOSE
		logerror("YMF278B: Skipping attack (rate = %d)\n", slot->AR);
#endif
		slot->env_step++;
	}
	if(slot->env_step == 1)
	{
		// Decay 1
		slot->env_vol = 0;
		slot->env_step++;
		if(slot->DL)
		{
			int rate = ymf278b_compute_rate(slot, slot->D1R);
#ifdef VERBOSE
			logerror("YMF278B: Decay step 1, dl=%d, val = %d rate = %d, delay = %g\n", slot->DL, slot->D1R, rate, ymf278_compute_decay_rate(rate)*1000.0*clock_ratio/Machine->sample_rate);
#endif
			if(rate<4)
				slot->env_vol_step = 0;
			else
				slot->env_vol_step = ((slot->DL*8)<<23) / (ymf278_compute_decay_rate(rate) * clock_ratio);
			slot->env_vol_lim = (slot->DL*8)<<23;
			return;
		}
	}
	if(slot->env_step == 2)
	{
		// Decay 2
		int rate = ymf278b_compute_rate(slot, slot->D2R);
#ifdef VERBOSE
		logerror("YMF278B: Decay step 2, val = %d, rate = %d, delay = %g, current vol = %d\n", slot->D2R, rate, ymf278_compute_decay_rate(rate)*1000.0*clock_ratio/Machine->sample_rate, slot->env_vol >> 23);
#endif
		if(rate<4)
			slot->env_vol_step = 0;
		else
			slot->env_vol_step = ((256U-slot->DL*8)<<23) / (ymf278_compute_decay_rate(rate) * clock_ratio);
		slot->env_vol_lim = 256U<<23;
		slot->env_step++;
		return;
	}

Esempio n. 2

File: ymf278b.c Progetto: nitrologic/emu

static void ymf278b_envelope_next(YMF278BSlot *slot)
{
	if(slot->env_step == 0)
	{
		// Attack
		slot->env_vol = (256U << 23) - 1;
		slot->env_vol_lim = 256U<<23;
		LOG(("YMF278B: Skipping attack (rate = %d)\n", slot->AR));
		slot->env_step++;
	}
	if(slot->env_step == 1)
	{
		// Decay 1
		slot->env_vol = 0;
		slot->env_step++;
		if(slot->DL)
		{
			int rate = ymf278b_compute_rate(slot, slot->D1R);
			LOG(("YMF278B: Decay step 1, dl=%d, val = %d rate = %d, delay = %g\n", slot->DL, slot->D1R, rate, ymf278_compute_decay_rate(rate)*1000.0));

			if(rate<4)
				slot->env_vol_step = 0;
			else
				slot->env_vol_step = ((slot->DL*8)<<23) / ymf278_compute_decay_rate(rate);
			slot->env_vol_lim = (slot->DL*8)<<23;
			return;
		}
	}
	if(slot->env_step == 2)
	{
		// Decay 2
		int rate = ymf278b_compute_rate(slot, slot->D2R);

		LOG(("YMF278B: Decay step 2, val = %d, rate = %d, delay = %g, current vol = %d\n", slot->D2R, rate, ymf278_compute_decay_rate(rate)*1000.0, slot->env_vol >> 23));
		if(rate<4)
			slot->env_vol_step = 0;
		else
			slot->env_vol_step = ((256U-slot->DL*8)<<23) / ymf278_compute_decay_rate(rate);
		slot->env_vol_lim = 256U<<23;
		slot->env_step++;
		return;
	}