/*
   XMMS-SID - SIDPlay input plugin for X MultiMedia System (XMMS)

   libSIDPlay v1 support

   Programmed and designed by Matti 'ccr' Hamalainen <ccr@tnsp.org>
   (C) Copyright 1999-2005 Tecnic Software productions (TNSP)

   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.,
   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "xmms-sid.h"

#ifdef HAVE_SIDPLAY1

#include "xs_sidplay1.h"
#include <stdio.h>
#include "xs_config.h"

#include <sidplay/player.h>
#include <sidplay/myendian.h>
#include <sidplay/fformat.h>


typedef struct {
	emuEngine *currEng;
	emuConfig currConfig;
	sidTune *currTune;
} t_xs_sidplay1;


/* We need to 'export' all this pseudo-C++ crap */
extern "C" {


/* Check if we can play the given file
 */
gboolean xs_sidplay1_isourfile(gchar * pcFilename)
{
	sidTune *testTune = new sidTune(pcFilename);

	if (!testTune) return FALSE;

	if (!testTune->getStatus()) {
		delete testTune;
		return FALSE;
	}

	delete testTune;
	return TRUE;
}


/* Initialize SIDPlay1
 */
gboolean xs_sidplay1_init(t_xs_status * myStatus)
{
	gint tmpFreq;
	t_xs_sidplay1 *myEngine;
	assert(myStatus);

	/* Allocate internal structures */
	myEngine = (t_xs_sidplay1 *) g_malloc0(sizeof(t_xs_sidplay1));
	if (!myEngine) return FALSE;

	/* Initialize engine */
	myEngine->currEng = new emuEngine();
	if (!myEngine->currEng) {
		xs_error("Could not initialize libSIDPlay1 emulation engine\n");
		g_free(myEngine);
		return FALSE;
	}

	/* Verify endianess */
	if (!myEngine->currEng->verifyEndianess()) {
		xs_error("Endianess verification failed\n");
		delete myEngine->currEng;
		g_free(myEngine);
		return FALSE;
	}

	myStatus->sidEngine = myEngine;

	/* Get current configuration */
	myEngine->currEng->getConfig(myEngine->currConfig);

	/* Configure channel parameters */
	switch (myStatus->audioChannels) {

	case XS_CHN_AUTOPAN:
		myEngine->currConfig.channels = SIDEMU_STEREO;
		myEngine->currConfig.autoPanning = SIDEMU_CENTEREDAUTOPANNING;
		myEngine->currConfig.volumeControl = SIDEMU_FULLPANNING;
		break;

	case XS_CHN_STEREO:
		myEngine->currConfig.channels = SIDEMU_STEREO;
		myEngine->currConfig.autoPanning = SIDEMU_NONE;
		myEngine->currConfig.volumeControl = SIDEMU_NONE;
		break;

	case XS_CHN_MONO:
	default:
		myEngine->currConfig.channels = SIDEMU_MONO;
		myEngine->currConfig.autoPanning = SIDEMU_NONE;
		myEngine->currConfig.volumeControl = SIDEMU_NONE;
		myStatus->audioChannels = XS_CHN_MONO;
		break;
	}


	/* Memory mode settings */
	switch (xs_cfg.memoryMode) {
	case XS_MPU_TRANSPARENT_ROM:
		myEngine->currConfig.memoryMode = MPU_TRANSPARENT_ROM;
		break;

	case XS_MPU_PLAYSID_ENVIRONMENT:
		myEngine->currConfig.memoryMode = MPU_PLAYSID_ENVIRONMENT;
		break;

	case XS_MPU_BANK_SWITCHING:
	default:
		myEngine->currConfig.memoryMode = MPU_BANK_SWITCHING;
		xs_cfg.memoryMode = XS_MPU_BANK_SWITCHING;
		break;
	}


	/* Audio parameters sanity checking and setup */
	myEngine->currConfig.bitsPerSample = myStatus->audioBitsPerSample;
	tmpFreq = myStatus->audioFrequency;

	if (myStatus->oversampleEnable) {
		if ((tmpFreq * myStatus->oversampleFactor) > SIDPLAY1_MAX_FREQ) {
			myStatus->oversampleEnable = FALSE;
		} else {
			tmpFreq = (tmpFreq * myStatus->oversampleFactor);
		}
	} else {
		if (tmpFreq > SIDPLAY1_MAX_FREQ)
			tmpFreq = SIDPLAY1_MAX_FREQ;
	}

	myEngine->currConfig.frequency = tmpFreq;

	switch (myStatus->audioBitsPerSample) {
	case XS_RES_8BIT:
		switch (myStatus->audioFormat) {
		case FMT_S8:
			myStatus->audioFormat = FMT_S8;
			myEngine->currConfig.sampleFormat = SIDEMU_SIGNED_PCM;
			break;

		case FMT_U8:
		default:
			myStatus->audioFormat = FMT_U8;
			myEngine->currConfig.sampleFormat = SIDEMU_UNSIGNED_PCM;
			break;
		}
		break;

	case XS_RES_16BIT:
	default:
		switch (myStatus->audioFormat) {
		case FMT_U16_NE:
		case FMT_U16_LE:
		case FMT_U16_BE:
			myStatus->audioFormat = FMT_U16_NE;
			myEngine->currConfig.sampleFormat = SIDEMU_UNSIGNED_PCM;
			break;

		case FMT_S16_NE:
		case FMT_S16_LE:
		case FMT_S16_BE:
		default:
			myStatus->audioFormat = FMT_S16_NE;
			myEngine->currConfig.sampleFormat = SIDEMU_SIGNED_PCM;
			break;
		}
		break;
	}

	/* Clockspeed settings */
	switch (xs_cfg.clockSpeed) {
	case XS_CLOCK_NTSC:
		myEngine->currConfig.clockSpeed = SIDTUNE_CLOCK_NTSC;
		break;

	case XS_CLOCK_PAL:
	default:
		myEngine->currConfig.clockSpeed = SIDTUNE_CLOCK_PAL;
		xs_cfg.clockSpeed = XS_CLOCK_PAL;
		break;
	}

	myEngine->currConfig.forceSongSpeed = xs_cfg.forceSpeed;
	
	
	/* Configure rest of the emulation */
	/* if (xs_cfg.forceModel) */
	myEngine->currConfig.mos8580 = xs_cfg.mos8580;
	myEngine->currConfig.emulateFilter = xs_cfg.emulateFilters;
	myEngine->currConfig.filterFs = xs_cfg.filterFs;
	myEngine->currConfig.filterFm = xs_cfg.filterFm;
	myEngine->currConfig.filterFt = xs_cfg.filterFt;


	/* Now set the emulator configuration */
	if (!myEngine->currEng->setConfig(myEngine->currConfig)) {
		xs_error("Emulator engine configuration failed!\n");
		return FALSE;
	}

	return TRUE;
}


/* Close SIDPlay1 engine
 */
void xs_sidplay1_close(t_xs_status * myStatus)
{
	t_xs_sidplay1 *myEngine;
	assert(myStatus);

	myEngine = (t_xs_sidplay1 *) myStatus->sidEngine;

	/* Free internals */
	if (myEngine->currEng) {
		delete myEngine->currEng;
		myEngine->currEng = NULL;
	}

	g_free(myEngine);
	myStatus->sidEngine = NULL;
}


/* Initialize current song and sub-tune
 */
gboolean xs_sidplay1_initsong(t_xs_status * myStatus)
{
	t_xs_sidplay1 *myEngine;
	assert(myStatus);

	myEngine = (t_xs_sidplay1 *) myStatus->sidEngine;
	if (!myEngine) return FALSE;

	if (!myEngine->currTune) {
		xs_error("Tune was NULL\n");
		return FALSE;
	}

	if (!myEngine->currTune->getStatus()) {
		xs_error("Tune status check failed\n");
		return FALSE;
	}

	return sidEmuInitializeSong(*myEngine->currEng, *myEngine->currTune, myStatus->currSong);
}


/* Emulate and render audio data to given buffer
 */
guint xs_sidplay1_fillbuffer(t_xs_status * myStatus, gchar * audioBuffer, guint audioBufSize)
{
	t_xs_sidplay1 *myEngine;
	assert(myStatus);

	myEngine = (t_xs_sidplay1 *) myStatus->sidEngine;
	if (!myEngine) return 0;

	sidEmuFillBuffer(*myEngine->currEng, *myEngine->currTune, audioBuffer, audioBufSize);

	return audioBufSize;
}


/* Load a given SID-tune file
 */
gboolean xs_sidplay1_loadsid(t_xs_status * myStatus, gchar * pcFilename)
{
	t_xs_sidplay1 *myEngine;
	sidTune *newTune;
	assert(myStatus);

	myEngine = (t_xs_sidplay1 *) myStatus->sidEngine;
	if (!myEngine) return FALSE;

	/* Try to load the file/tune */
	if (!pcFilename) return FALSE;

	newTune = new sidTune(pcFilename);
	if (!newTune) return FALSE;

	myEngine->currTune = newTune;

	return TRUE;
}


/* Delete INTERNAL information
 */
void xs_sidplay1_deletesid(t_xs_status * myStatus)
{
	t_xs_sidplay1 *myEngine;
	assert(myStatus);

	myEngine = (t_xs_sidplay1 *) myStatus->sidEngine;
	if (!myEngine) return;

	if (myEngine->currTune) {
		delete myEngine->currTune;
		myEngine->currTune = NULL;
	}
}


/* Return song information
 */
#define TFUNCTION	xs_sidplay1_getsidinfo
#define TTUNEINFO	sidTuneInfo
#define TTUNE		sidTune
#include "xs_sidplay.h"

}				/* extern "C" */
#endif				/* HAVE_SIDPLAY1 */