voicemgr.c

是关于linux2.5.1的完全源码

/*
 **********************************************************************
 *     voicemgr.c - Voice manager for emu10k1 driver
 *     Copyright 1999, 2000 Creative Labs, Inc.
 *
 **********************************************************************
 *
 *     Date                 Author          Summary of changes
 *     ----                 ------          ------------------
 *     October 20, 1999     Bertrand Lee    base code release
 *
 **********************************************************************
 *
 *     This program is free software; you can redistribute it and/or
 *     modify it under the terms of the GNU General Public License as
 *     published by the Free Software Foundation; either version 2 of
 *     the License, or (at your option) any later version.
 *
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public
 *     License along with this program; if not, write to the Free
 *     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
 *     USA.
 *
 **********************************************************************
 */

#include "voicemgr.h"
#include "8010.h"

int emu10k1_voice_alloc(struct emu10k1_card *card, struct emu_voice *voice)
{
	u8 *voicetable = card->voicetable;
	int i;
	unsigned long flags;

	DPF(2, "emu10k1_voice_alloc()\n");

	spin_lock_irqsave(&card->lock, flags);

	if (voice->flags & VOICE_FLAGS_STEREO) {
		for (i = 0; i < NUM_G; i += 2)
			if ((voicetable[i] == VOICE_USAGE_FREE) && (voicetable[i + 1] == VOICE_USAGE_FREE)) {
				voicetable[i] = voice->usage;
				voicetable[i + 1] = voice->usage;
				break;
			}
	} else {
		for (i = 0; i < NUM_G; i++)
			if (voicetable[i] == VOICE_USAGE_FREE) {
				voicetable[i] = voice->usage;
				break;
			}
	}

	spin_unlock_irqrestore(&card->lock, flags);

	if (i >= NUM_G)
		return -1;

	voice->card = card;
	voice->num = i;

	for (i = 0; i < (voice->flags & VOICE_FLAGS_STEREO ? 2 : 1); i++) {
		DPD(2, " voice allocated -> %d\n", voice->num + i);

		sblive_writeptr_tag(card, voice->num + i, IFATN, 0xffff,
							DCYSUSV, 0,
							VTFT, 0x0000ffff,
							PTRX, 0,
							TAGLIST_END);
	}

	return 0;
}

void emu10k1_voice_free(struct emu_voice *voice)
{
	struct emu10k1_card *card = voice->card;
	int i;
	unsigned long flags;

	DPF(2, "emu10k1_voice_free()\n");

	if (voice->usage == VOICE_USAGE_FREE)
		return;

	for (i = 0; i < (voice->flags & VOICE_FLAGS_STEREO ? 2 : 1); i++) {
		DPD(2, " voice released -> %d\n", voice->num + i);

		sblive_writeptr_tag(card, voice->num + i, DCYSUSV, 0, 
							VTFT, 0x0000ffff,
							PTRX_PITCHTARGET, 0,
							CVCF, 0x0000ffff,
							CPF, 0,
							TAGLIST_END);
	}

	voice->usage = VOICE_USAGE_FREE;

	spin_lock_irqsave(&card->lock, flags);

	card->voicetable[voice->num] = VOICE_USAGE_FREE;

	if (voice->flags & VOICE_FLAGS_STEREO)
		card->voicetable[voice->num + 1] = VOICE_USAGE_FREE;

	spin_unlock_irqrestore(&card->lock, flags);
}

void emu10k1_voice_playback_setup(struct emu_voice *voice)
{
	struct emu10k1_card *card = voice->card;
	u32 start;
	int i;

	DPF(2, "emu10k1_voice_playback_setup()\n");

	if (voice->flags & VOICE_FLAGS_STEREO) {
		/* Set stereo bit */
		start = 28;
		sblive_writeptr(card, CPF, voice->num, CPF_STEREO_MASK);
		sblive_writeptr(card, CPF, voice->num + 1, CPF_STEREO_MASK);
	} else {
		start = 30;
		sblive_writeptr(card, CPF, voice->num, 0);
	}

	if(!(voice->flags & VOICE_FLAGS_16BIT))
		start *= 2;

	voice->start += start;

	for (i = 0; i < (voice->flags & VOICE_FLAGS_STEREO ? 2 : 1); i++) {
		sblive_writeptr(card, FXRT, voice->num + i, voice->params[i].send_routing << 16);

		/* Stop CA */
		/* Assumption that PT is already 0 so no harm overwriting */
		sblive_writeptr(card, PTRX, voice->num + i, (voice->params[i].send_a << 8) | voice->params[i].send_b);

		sblive_writeptr_tag(card, voice->num + i,
				/* CSL, ST, CA */
				    DSL, voice->endloop | (voice->params[i].send_d << 24),
				    PSST, voice->startloop | (voice->params[i].send_c << 24),
				    CCCA, (voice->start) | CCCA_INTERPROM_0 | ((voice->flags & VOICE_FLAGS_16BIT) ? 0 : CCCA_8BITSELECT),
				    /* Clear filter delay memory */
				    Z1, 0,
				    Z2, 0,
				    /* Invalidate maps */
				    MAPA, MAP_PTI_MASK | (card->silentpage.dma_handle * 2),
				    MAPB, MAP_PTI_MASK | (card->silentpage.dma_handle * 2),
				/* modulation envelope */
				    CVCF, 0x0000ffff,
				    VTFT, 0x0000ffff,
				    ATKHLDM, 0,
				    DCYSUSM, 0x007f,
				    LFOVAL1, 0x8000,
				    LFOVAL2, 0x8000,
				    FMMOD, 0,
				    TREMFRQ, 0,
				    FM2FRQ2, 0,
				    ENVVAL, 0x8000,
				/* volume envelope */
				    ATKHLDV, 0x7f7f,
				    ENVVOL, 0x8000,
				/* filter envelope */
				    PEFE_FILTERAMOUNT, 0x7f,
				/* pitch envelope */
				    PEFE_PITCHAMOUNT, 0, TAGLIST_END);

		voice->params[i].fc_target = 0xffff;
	}
}

void emu10k1_voices_start(struct emu_voice *first_voice, unsigned int num_voices, int set)
{
	struct emu10k1_card *card = first_voice->card;
	struct emu_voice *voice;
	unsigned int voicenum;
	int j;

	DPF(2, "emu10k1_voices_start()\n");

	for (voicenum = 0; voicenum < num_voices; voicenum++)
	{
		voice = first_voice + voicenum;

		if (!set) {
			u32 cra, ccis, cs, sample;
			if (voice->flags & VOICE_FLAGS_STEREO) {
				cra = 64;
				ccis = 28;
				cs = 4;
			} else {
				cra = 64;
				ccis = 30;
				cs = 2;
			}

			if(voice->flags & VOICE_FLAGS_16BIT) {
				sample = 0x00000000;
			} else {
				sample = 0x80808080;		
				ccis *= 2;
			}

			for(j = 0; j < cs; j++)
	        	        sblive_writeptr(card, CD0 + j, voice->num, sample);

			/* Reset cache */
			sblive_writeptr(card, CCR_CACHEINVALIDSIZE, voice->num, 0);
			if (voice->flags & VOICE_FLAGS_STEREO)
				sblive_writeptr(card, CCR_CACHEINVALIDSIZE, voice->num + 1, 0);

			sblive_writeptr(card, CCR_READADDRESS, voice->num, cra);

			if (voice->flags & VOICE_FLAGS_STEREO)
				sblive_writeptr(card, CCR_READADDRESS, voice->num + 1, cra);

			/* Fill cache */
			sblive_writeptr(card, CCR_CACHEINVALIDSIZE, voice->num, ccis);
		}

		for (j = 0; j < (voice->flags & VOICE_FLAGS_STEREO ? 2 : 1); j++) {
			sblive_writeptr_tag(card, voice->num + j,
				    IFATN, (voice->params[j].initial_fc << 8) | voice->params[j].initial_attn,
				    VTFT, (voice->params[j].volume_target << 16) | voice->params[j].fc_target,
				    CVCF, (voice->params[j].volume_target << 16) | voice->params[j].fc_target,
				    DCYSUSV, (voice->params[j].byampl_env_sustain << 8) | voice->params[j].byampl_env_decay,
				    TAGLIST_END);
	
			emu10k1_clear_stop_on_loop(card, voice->num + j);
		}
	}


        for (voicenum = 0; voicenum < num_voices; voicenum++)
	{
		voice = first_voice + voicenum;

		for (j = 0; j < (voice->flags & VOICE_FLAGS_STEREO ? 2 : 1); j++) {
			sblive_writeptr(card, PTRX_PITCHTARGET, voice->num + j, voice->pitch_target);

			if (j == 0)
				sblive_writeptr(card, CPF_CURRENTPITCH, voice->num, voice->pitch_target);

			sblive_writeptr(card, IP, voice->num + j, voice->initial_pitch);
		}
	}
}

void emu10k1_voices_stop(struct emu_voice *first_voice, int num_voices)
{
	struct emu10k1_card *card = first_voice->card;
	struct emu_voice *voice;
	unsigned int voice_num;
	int j;

	DPF(2, "emu10k1_voice_stop()\n");

        for (voice_num = 0; voice_num < num_voices; voice_num++)
	{
		voice = first_voice + voice_num;

		for (j = 0; j < (voice->flags & VOICE_FLAGS_STEREO ? 2 : 1); j++) {
			sblive_writeptr_tag(card, voice->num + j,
						PTRX_PITCHTARGET, 0,
						CPF_CURRENTPITCH, 0,
						IFATN, 0xffff,
						VTFT, 0x0000ffff,
						CVCF, 0x0000ffff,
						IP, 0,
						TAGLIST_END);
		}
	}
}