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create: write H:MM:SS timestamps, add option to fill with gaussian-blur instead of black many albums are longer than one hour so writing H:MM:SS is a necessity. if anything there will just be verbose info that isn't important for my use-case. however the gaussian-blur is simply broken. It works, and it plays locally just fine, but YouTube in particular elongates the video to fit the full width. I'm not entirely sure why it does this, but it makes it useless and ugly.
author Paper <paper@tflc.us>
date Sat, 03 Jan 2026 20:25:38 -0500
parents 8e4ee43d3b81
children
line wrap: on
line source

#include <stdint.h>
#include <stdbool.h>
#include "snd_masm.h"
#include "pmplay.h"

/* 8bb: This is done in a slightly different way, but the result
** is the same (bit-accurate to FT2.08/FT2.09 w/ SB16, and WAV-writer).
**
** Mixer macros are stored in snd_masm.h
*/

void PMPMix32Proc(CIType *v, int32_t numSamples, int32_t bufferPos)
{
	if (v->SType & SType_Off)
		return; // voice is not active

	uint32_t volStatus = v->SLVol1 | v->SRVol1;
	if (volumeRampingFlag)
		volStatus |= v->SLVol2 | v->SRVol2;

	if (volStatus == 0) // silence mix
	{
		const uint64_t samplesToMix = (uint64_t)v->SFrq * (uint32_t)numSamples; // 16.16fp

		const int32_t samples = (int32_t)(samplesToMix >> 16);
		const int32_t samplesFrac = (samplesToMix & 0xFFFF) + (v->SPosDec >> 16);

		int32_t realPos = v->SPos + samples + (samplesFrac >> 16);
		int32_t posFrac = samplesFrac & 0xFFFF;

		if (realPos >= v->SLen)
		{
			uint8_t SType = v->SType;
			if (SType & (SType_Fwd+SType_Rev))
			{
				do
				{
					SType ^= SType_RevDir;
					realPos -= v->SRepL;
				}
				while (realPos >= v->SLen);
				v->SType = SType;
			}
			else
			{
				v->SType = SType_Off;
				return;
			}
		}

		v->SPosDec = posFrac << 16;
		v->SPos = realPos;
	}
	else // normal mixing
	{
		bool mixInCenter;
		if (volumeRampingFlag)
			mixInCenter = (v->SLVol2 == v->SRVol2) && (v->SLVolIP == v->SRVolIP);
		else
			mixInCenter = v->SLVol1 == v->SRVol1;

		mixRoutineTable[(mixInCenter * 8) + v->SMixType](v, numSamples, bufferPos);
	}
}

static void mix8b(CIType *v, uint32_t numSamples, uint32_t bufferPos)
{
	int32_t sample;

	GET_VOL
	GET_MIXER_VARS
	SET_BASE8

	int32_t CDA_BytesLeft = numSamples;
	while (CDA_BytesLeft > 0)
	{
		LIMIT_MIX_NUM
		CDA_BytesLeft -= samplesToMix;

		HANDLE_POS_START
		for (i = 0; i < (samplesToMix & 3); i++)
		{
			MIX_8BIT
		}
		samplesToMix >>= 2;
		for (i = 0; i < samplesToMix; i++)
		{
			MIX_8BIT
			MIX_8BIT
			MIX_8BIT
			MIX_8BIT
		}
		HANDLE_POS_END
	}

	SET_BACK_MIXER_POS
}

static void mix8bIntrp(CIType *v, uint32_t numSamples, uint32_t bufferPos)
{
	int32_t sample, sample2;

	GET_VOL
	GET_MIXER_VARS
	SET_BASE8

	int32_t CDA_BytesLeft = numSamples;
	while (CDA_BytesLeft > 0)
	{
		LIMIT_MIX_NUM
		CDA_BytesLeft -= samplesToMix;

		HANDLE_POS_START
		for (i = 0; i < (samplesToMix & 3); i++)
		{
			MIX_8BIT_INTRP
		}
		samplesToMix >>= 2;
		for (i = 0; i < samplesToMix; i++)
		{
			MIX_8BIT_INTRP
			MIX_8BIT_INTRP
			MIX_8BIT_INTRP
			MIX_8BIT_INTRP
		}
		HANDLE_POS_END
	}

	SET_BACK_MIXER_POS
}

static void mix8bRamp(CIType *v, uint32_t numSamples, uint32_t bufferPos)
{
	int32_t sample;

	GET_MIXER_VARS
	GET_RAMP_VARS
	SET_BASE8

	int32_t CDA_BytesLeft = numSamples;
	while (CDA_BytesLeft > 0)
	{
		LIMIT_MIX_NUM
		LIMIT_MIX_NUM_RAMP
		CDA_BytesLeft -= samplesToMix;

		GET_VOL_RAMP
		HANDLE_POS_START
		for (i = 0; i < (samplesToMix & 3); i++)
		{
			MIX_8BIT
			VOL_RAMP
		}
		samplesToMix >>= 2;
		for (i = 0; i < samplesToMix; i++)
		{
			MIX_8BIT
			VOL_RAMP
			MIX_8BIT
			VOL_RAMP
			MIX_8BIT
			VOL_RAMP
			MIX_8BIT
			VOL_RAMP
		}
		HANDLE_POS_END
		SET_VOL_BACK
	}

	SET_BACK_MIXER_POS
}

static void mix8bRampIntrp(CIType *v, uint32_t numSamples, uint32_t bufferPos)
{
	int32_t sample, sample2;

	GET_MIXER_VARS
	GET_RAMP_VARS
	SET_BASE8

	int32_t CDA_BytesLeft = numSamples;
	while (CDA_BytesLeft > 0)
	{
		LIMIT_MIX_NUM
		LIMIT_MIX_NUM_RAMP
		CDA_BytesLeft -= samplesToMix;

		GET_VOL_RAMP
		HANDLE_POS_START
		for (i = 0; i < (samplesToMix & 3); i++)
		{
			MIX_8BIT_INTRP
			VOL_RAMP
		}
		samplesToMix >>= 2;
		for (i = 0; i < samplesToMix; i++)
		{
			MIX_8BIT_INTRP
			VOL_RAMP
			MIX_8BIT_INTRP
			VOL_RAMP
			MIX_8BIT_INTRP
			VOL_RAMP
			MIX_8BIT_INTRP
			VOL_RAMP
		}
		HANDLE_POS_END
		SET_VOL_BACK
	}

	SET_BACK_MIXER_POS
}

static void mix16b(CIType *v, uint32_t numSamples, uint32_t bufferPos)
{
	int32_t sample;

	GET_VOL
	GET_MIXER_VARS
	SET_BASE16

	int32_t CDA_BytesLeft = numSamples;
	while (CDA_BytesLeft > 0)
	{
		LIMIT_MIX_NUM
		CDA_BytesLeft -= samplesToMix;

		HANDLE_POS_START
		for (i = 0; i < (samplesToMix & 3); i++)
		{
			MIX_16BIT
		}
		samplesToMix >>= 2;
		for (i = 0; i < samplesToMix; i++)
		{
			MIX_16BIT
			MIX_16BIT
			MIX_16BIT
			MIX_16BIT
		}
		HANDLE_POS_END
	}

	SET_BACK_MIXER_POS
}

static void mix16bIntrp(CIType *v, uint32_t numSamples, uint32_t bufferPos)
{
	int32_t sample, sample2;

	GET_VOL
	GET_MIXER_VARS
	SET_BASE16

	int32_t CDA_BytesLeft = numSamples;
	while (CDA_BytesLeft > 0)
	{
		LIMIT_MIX_NUM
		CDA_BytesLeft -= samplesToMix;

		HANDLE_POS_START
		for (i = 0; i < (samplesToMix & 3); i++)
		{
			MIX_16BIT_INTRP
		}
		samplesToMix >>= 2;
		for (i = 0; i < samplesToMix; i++)
		{
			MIX_16BIT_INTRP
			MIX_16BIT_INTRP
			MIX_16BIT_INTRP
			MIX_16BIT_INTRP
		}
		HANDLE_POS_END
	}

	SET_BACK_MIXER_POS
}

static void mix16bRamp(CIType *v, uint32_t numSamples, uint32_t bufferPos)
{
	int32_t sample;

	GET_MIXER_VARS
	GET_RAMP_VARS
	SET_BASE16

	int32_t CDA_BytesLeft = numSamples;
	while (CDA_BytesLeft > 0)
	{
		LIMIT_MIX_NUM
		LIMIT_MIX_NUM_RAMP
		CDA_BytesLeft -= samplesToMix;

		GET_VOL_RAMP
		HANDLE_POS_START
		for (i = 0; i < (samplesToMix & 3); i++)
		{
			MIX_16BIT
			VOL_RAMP
		}
		samplesToMix >>= 2;
		for (i = 0; i < samplesToMix; i++)
		{
			MIX_16BIT
			VOL_RAMP
			MIX_16BIT
			VOL_RAMP
			MIX_16BIT
			VOL_RAMP
			MIX_16BIT
			VOL_RAMP
		}
		HANDLE_POS_END
		SET_VOL_BACK
	}

	SET_BACK_MIXER_POS
}

static void mix16bRampIntrp(CIType *v, uint32_t numSamples, uint32_t bufferPos)
{
	int32_t sample, sample2;

	GET_MIXER_VARS
	GET_RAMP_VARS
	SET_BASE16

	int32_t CDA_BytesLeft = numSamples;
	while (CDA_BytesLeft > 0)
	{
		LIMIT_MIX_NUM
		LIMIT_MIX_NUM_RAMP
		CDA_BytesLeft -= samplesToMix;

		GET_VOL_RAMP
		HANDLE_POS_START
		for (i = 0; i < (samplesToMix & 3); i++)
		{
			MIX_16BIT_INTRP
			VOL_RAMP
		}
		samplesToMix >>= 2;
		for (i = 0; i < samplesToMix; i++)
		{
			MIX_16BIT_INTRP
			VOL_RAMP
			MIX_16BIT_INTRP
			VOL_RAMP
			MIX_16BIT_INTRP
			VOL_RAMP
			MIX_16BIT_INTRP
			VOL_RAMP
		}
		HANDLE_POS_END
		SET_VOL_BACK
	}

	SET_BACK_MIXER_POS
}

static void mix8bCenter(CIType *v, uint32_t numSamples, uint32_t bufferPos)
{
	int32_t sample;

	GET_VOL_CENTER
	GET_MIXER_VARS
	SET_BASE8

	int32_t CDA_BytesLeft = numSamples;
	while (CDA_BytesLeft > 0)
	{
		LIMIT_MIX_NUM
		CDA_BytesLeft -= samplesToMix;

		HANDLE_POS_START
		for (i = 0; i < (samplesToMix & 3); i++)
		{
			MIX_8BIT_M
		}
		samplesToMix >>= 2;
		for (i = 0; i < samplesToMix; i++)
		{
			MIX_8BIT_M
			MIX_8BIT_M
			MIX_8BIT_M
			MIX_8BIT_M
		}
		HANDLE_POS_END
	}

	SET_BACK_MIXER_POS
}

static void mix8bIntrpCenter(CIType *v, uint32_t numSamples, uint32_t bufferPos)
{
	int32_t sample, sample2;

	GET_VOL_CENTER
	GET_MIXER_VARS
	SET_BASE8

	int32_t CDA_BytesLeft = numSamples;
	while (CDA_BytesLeft > 0)
	{
		LIMIT_MIX_NUM
		CDA_BytesLeft -= samplesToMix;

		HANDLE_POS_START
		for (i = 0; i < (samplesToMix & 3); i++)
		{
			MIX_8BIT_INTRP_M
		}
		samplesToMix >>= 2;
		for (i = 0; i < samplesToMix; i++)
		{
			MIX_8BIT_INTRP_M
			MIX_8BIT_INTRP_M
			MIX_8BIT_INTRP_M
			MIX_8BIT_INTRP_M
		}
		HANDLE_POS_END
	}

	SET_BACK_MIXER_POS
}

static void mix8bRampCenter(CIType *v, uint32_t numSamples, uint32_t bufferPos)
{
	int32_t sample;

	GET_MIXER_VARS
	GET_RAMP_VARS
	SET_BASE8

	int32_t CDA_BytesLeft = numSamples;
	while (CDA_BytesLeft > 0)
	{
		LIMIT_MIX_NUM
		LIMIT_MIX_NUM_RAMP
		CDA_BytesLeft -= samplesToMix;

		GET_VOL_RAMP
		HANDLE_POS_START
		for (i = 0; i < (samplesToMix & 3); i++)
		{
			MIX_8BIT_M
			VOL_RAMP
		}
		samplesToMix >>= 2;
		for (i = 0; i < samplesToMix; i++)
		{
			MIX_8BIT_M
			VOL_RAMP
			MIX_8BIT_M
			VOL_RAMP
			MIX_8BIT_M
			VOL_RAMP
			MIX_8BIT_M
			VOL_RAMP
		}
		HANDLE_POS_END
		SET_VOL_BACK
	}

	SET_BACK_MIXER_POS
}

static void mix8bRampIntrpCenter(CIType *v, uint32_t numSamples, uint32_t bufferPos)
{
	int32_t sample, sample2;

	GET_MIXER_VARS
	GET_RAMP_VARS
	SET_BASE8

	int32_t CDA_BytesLeft = numSamples;
	while (CDA_BytesLeft > 0)
	{
		LIMIT_MIX_NUM
		LIMIT_MIX_NUM_RAMP
		CDA_BytesLeft -= samplesToMix;

		GET_VOL_RAMP
		HANDLE_POS_START
		for (i = 0; i < (samplesToMix & 3); i++)
		{
			MIX_8BIT_INTRP_M
			VOL_RAMP
		}
		samplesToMix >>= 2;
		for (i = 0; i < samplesToMix; i++)
		{
			MIX_8BIT_INTRP_M
			VOL_RAMP
			MIX_8BIT_INTRP_M
			VOL_RAMP
			MIX_8BIT_INTRP_M
			VOL_RAMP
			MIX_8BIT_INTRP_M
			VOL_RAMP
		}
		HANDLE_POS_END
		SET_VOL_BACK
	}

	SET_BACK_MIXER_POS
}

static void mix16bCenter(CIType *v, uint32_t numSamples, uint32_t bufferPos)
{
	int32_t sample;

	GET_VOL_CENTER
	GET_MIXER_VARS
	SET_BASE16

	int32_t CDA_BytesLeft = numSamples;
	while (CDA_BytesLeft > 0)
	{
		LIMIT_MIX_NUM
		CDA_BytesLeft -= samplesToMix;

		HANDLE_POS_START
		for (i = 0; i < (samplesToMix & 3); i++)
		{
			MIX_16BIT_M
		}
		samplesToMix >>= 2;
		for (i = 0; i < samplesToMix; i++)
		{
			MIX_16BIT_M
			MIX_16BIT_M
			MIX_16BIT_M
			MIX_16BIT_M
		}
		HANDLE_POS_END
	}

	SET_BACK_MIXER_POS
}

static void mix16bIntrpCenter(CIType *v, uint32_t numSamples, uint32_t bufferPos)
{
	int32_t sample, sample2;

	GET_VOL_CENTER
	GET_MIXER_VARS
	SET_BASE16

	int32_t CDA_BytesLeft = numSamples;
	while (CDA_BytesLeft > 0)
	{
		LIMIT_MIX_NUM
		CDA_BytesLeft -= samplesToMix;

		HANDLE_POS_START
		for (i = 0; i < (samplesToMix & 3); i++)
		{
			MIX_16BIT_INTRP_M
		}
		samplesToMix >>= 2;
		for (i = 0; i < samplesToMix; i++)
		{
			MIX_16BIT_INTRP_M
			MIX_16BIT_INTRP_M
			MIX_16BIT_INTRP_M
			MIX_16BIT_INTRP_M
		}
		HANDLE_POS_END
	}

	SET_BACK_MIXER_POS
}

static void mix16bRampCenter(CIType *v, uint32_t numSamples, uint32_t bufferPos)
{
	int32_t sample;

	GET_MIXER_VARS
	GET_RAMP_VARS
	SET_BASE16

	int32_t CDA_BytesLeft = numSamples;
	while (CDA_BytesLeft > 0)
	{
		LIMIT_MIX_NUM
		LIMIT_MIX_NUM_RAMP
		CDA_BytesLeft -= samplesToMix;

		GET_VOL_RAMP
		HANDLE_POS_START
		for (i = 0; i < (samplesToMix & 3); i++)
		{
			MIX_16BIT_M
			VOL_RAMP
		}
		samplesToMix >>= 2;
		for (i = 0; i < samplesToMix; i++)
		{
			MIX_16BIT_M
			VOL_RAMP
			MIX_16BIT_M
			VOL_RAMP
			MIX_16BIT_M
			VOL_RAMP
			MIX_16BIT_M
			VOL_RAMP
		}
		HANDLE_POS_END
		SET_VOL_BACK
	}

	SET_BACK_MIXER_POS
}

static void mix16bRampIntrpCenter(CIType *v, uint32_t numSamples, uint32_t bufferPos)
{
	int32_t sample, sample2;

	GET_MIXER_VARS
	GET_RAMP_VARS
	SET_BASE16

	int32_t CDA_BytesLeft = numSamples;
	while (CDA_BytesLeft > 0)
	{
		LIMIT_MIX_NUM
		LIMIT_MIX_NUM_RAMP
		CDA_BytesLeft -= samplesToMix;

		GET_VOL_RAMP
		HANDLE_POS_START
		for (i = 0; i < (samplesToMix & 3); i++)
		{
			MIX_16BIT_INTRP_M
			VOL_RAMP
		}
		samplesToMix >>= 2;
		for (i = 0; i < samplesToMix; i++)
		{
			MIX_16BIT_INTRP_M
			VOL_RAMP
			MIX_16BIT_INTRP_M
			VOL_RAMP
			MIX_16BIT_INTRP_M
			VOL_RAMP
			MIX_16BIT_INTRP_M
			VOL_RAMP
		}
		HANDLE_POS_END
		SET_VOL_BACK
	}

	SET_BACK_MIXER_POS
}

mixRoutine mixRoutineTable[16] =
{
	(mixRoutine)mix8b,
	(mixRoutine)mix8bIntrp,
	(mixRoutine)mix8bRamp,
	(mixRoutine)mix8bRampIntrp,
	(mixRoutine)mix16b,
	(mixRoutine)mix16bIntrp,
	(mixRoutine)mix16bRamp,
	(mixRoutine)mix16bRampIntrp,
	(mixRoutine)mix8bCenter,
	(mixRoutine)mix8bIntrpCenter,
	(mixRoutine)mix8bRampCenter,
	(mixRoutine)mix8bRampIntrpCenter,
	(mixRoutine)mix16bCenter,
	(mixRoutine)mix16bIntrpCenter,
	(mixRoutine)mix16bRampCenter,
	(mixRoutine)mix16bRampIntrpCenter
};