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

   libSIDPlay v2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "xmms-sid.h"

#ifdef HAVE_SIDPLAY2

#include "xs_sidplay2.h"
#include <stdio.h>
#include "xs_config.h"
#include "xs_support.h"
#include "xs_length.h"
#include "xs_title.h"

#include <sidplay/sidplay2.h>
#ifdef HAVE_RESID_BUILDER
#include <sidplay/builders/resid.h>
#endif
#ifdef HAVE_HARDSID_BUILDER
#include <sidplay/builders/hardsid.h>
#endif


typedef struct
{
	sidplay2 *currEng;
	sidbuilder *currBuilder;
	sid2_config_t currConfig;
	SidTune *currTune;
} t_xs_sidplay2;


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


/* Check if we can play the given file
 */
	gboolean xs_sidplay2_isourfile(gchar * pcFilename)
	{
		SidTune *testTune = new SidTune(pcFilename);

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

		delete testTune;
		return TRUE;
	}



/* Initialize SIDPlay2
 */
	gboolean xs_sidplay2_init(t_xs_status * myStatus)
	{
		gint tmpFreq;
		t_xs_sidplay2 *myEngine;
		assert(myStatus);

		/* Allocate internal structures */
		myEngine = (t_xs_sidplay2 *) g_malloc0(sizeof(t_xs_sidplay2));
		myStatus->sidEngine = myEngine;
		if (!myEngine)
			return FALSE;


		/* Initialize the engine */
		myEngine->currEng = new sidplay2;
		if (!myEngine->currEng) {
			XSERR("Could not initialize libSIDPlay2 emulation engine\n");
			return FALSE;
		}

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

		/* Configure channels and stuff */
		switch (myStatus->audioChannels) {

		case XS_CHN_AUTOPAN:
			myEngine->currConfig.playback = sid2_stereo;
			break;

		case XS_CHN_STEREO:
			myEngine->currConfig.playback = sid2_stereo;
			break;

		case XS_CHN_MONO:
		default:
			myEngine->currConfig.playback = sid2_mono;
			myStatus->audioChannels = XS_CHN_MONO;
			break;
		}


		/* Memory mode settings */
		switch (xs_cfg.memoryMode) {
		case XS_MPU_BANK_SWITCHING:
			myEngine->currConfig.environment = sid2_envBS;
			break;

		case XS_MPU_TRANSPARENT_ROM:
			myEngine->currConfig.environment = sid2_envTP;
			break;

		case XS_MPU_PLAYSID_ENVIRONMENT:
			myEngine->currConfig.environment = sid2_envPS;
			break;

		case XS_MPU_REAL:
		default:
			myEngine->currConfig.environment = sid2_envR;
			xs_cfg.memoryMode = XS_MPU_REAL;
			break;
		}


		/* Clockspeed settings */
		switch (xs_cfg.clockSpeed) {
		case XS_CLOCK_NTSC:
			myEngine->currConfig.clockSpeed = myEngine->currConfig.clockDefault = SID2_CLOCK_NTSC;
			break;

		case XS_CLOCK_PAL:
		default:
			myEngine->currConfig.clockSpeed = myEngine->currConfig.clockDefault = SID2_CLOCK_PAL;
			xs_cfg.clockSpeed = XS_CLOCK_PAL;
			break;
		}


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

		if (myStatus->oversampleEnable)
			tmpFreq = (tmpFreq * myStatus->oversampleFactor);

		myEngine->currConfig.frequency = tmpFreq;

		switch (myStatus->audioBitsPerSample) {
		case XS_RES_8BIT:
			myStatus->audioFormat = FMT_U8;
			myEngine->currConfig.sampleFormat = SID2_LITTLE_UNSIGNED;
			break;

		case XS_RES_16BIT:
		default:
			switch (myStatus->audioFormat) {
			case FMT_U16_LE:
				myEngine->currConfig.sampleFormat = SID2_LITTLE_UNSIGNED;
				break;

			case FMT_U16_BE:
				myEngine->currConfig.sampleFormat = SID2_BIG_UNSIGNED;
				break;

			case FMT_U16_NE:
#ifdef WORDS_BIGENDIAN
				myEngine->currConfig.sampleFormat = SID2_BIG_UNSIGNED;
#else
				myEngine->currConfig.sampleFormat = SID2_LITTLE_UNSIGNED;
#endif
				break;

			case FMT_S16_LE:
				myEngine->currConfig.sampleFormat = SID2_LITTLE_SIGNED;
				break;

			case FMT_S16_BE:
				myEngine->currConfig.sampleFormat = SID2_BIG_SIGNED;
				break;

			default:
				myStatus->audioFormat = FMT_S16_NE;
#ifdef WORDS_BIGENDIAN
				myEngine->currConfig.sampleFormat = SID2_BIG_SIGNED;
#else
				myEngine->currConfig.sampleFormat = SID2_LITTLE_SIGNED;
#endif
				break;

			}
			break;
		}

		/* Initialize builder object */
		XSDEBUG("init builder #%i, maxsids=%i\n", xs_cfg.sid2Builder, (myEngine->currEng->info()).maxsids);
#ifdef HAVE_RESID_BUILDER
		if (xs_cfg.sid2Builder == XS_BLD_RESID) {
			ReSIDBuilder *rs = new ReSIDBuilder("ReSID builder");
			myEngine->currBuilder = (sidbuilder *) rs;
			if (rs) {
				/* Builder object created, initialize it */
				rs->create((myEngine->currEng->info()).maxsids);
				if (!*rs) {
					XSERR("rs->create() failed. SIDPlay2 suxx again.\n");
					return FALSE;
				}

				rs->filter(xs_cfg.emulateFilters);
				if (!*rs) {
					XSERR("rs->filter(%d) failed.\n", xs_cfg.emulateFilters);
					return FALSE;
				}

				rs->sampling(tmpFreq);
				if (!*rs) {
					XSERR("rs->sampling(%d) failed.\n", tmpFreq);
					return FALSE;
				}

				rs->filter((sid_filter_t *) NULL);
				if (!*rs) {
					XSERR("rs->filter(NULL) failed.\n");
					return FALSE;
				}
			}
		}
#endif
#ifdef HAVE_HARDSID_BUILDER
		if (xs_cfg.sid2Builder == XS_BLD_HARDSID) {
			HardSIDBuilder *hs = new HardSIDBuilder("HardSID builder");
			myEngine->currBuilder = (sidbuilder *) hs;
			if (hs) {
				/* Builder object created, initialize it */
				hs->create((myEngine->currEng->info()).maxsids);
				if (!*hs) {
					XSERR("hs->create() failed. SIDPlay2 suxx again.\n");
					return FALSE;
				}

				hs->filter(xs_cfg.emulateFilters);
				if (!*hs) {
					XSERR("hs->filter(%d) failed.\n", xs_cfg.emulateFilters);
					return FALSE;
				}
			}
		}
#endif

		if (!myEngine->currBuilder) {
			XSERR("Could not initialize SIDBuilder object.\n");
			return FALSE;
		}

		XSDEBUG("%s\n", myEngine->currBuilder->credits());


		/* Configure rest of the emulation */
		myEngine->currConfig.sidEmulation = myEngine->currBuilder;
		myEngine->currConfig.clockForced = xs_cfg.forceSpeed;
		myEngine->currConfig.optimisation = (xs_cfg.sid2OptLevel) ? 1 : 0;
		if (xs_cfg.mos8580)
			myEngine->currConfig.sidDefault = SID2_MOS8580;
		else
			myEngine->currConfig.sidDefault = SID2_MOS6581;

		myEngine->currConfig.sidModel = myEngine->currConfig.sidDefault;
		myEngine->currConfig.sidSamples = TRUE;	// FIXME FIX ME, make configurable!


		/* Now set the emulator configuration */
		if (myEngine->currEng->config(myEngine->currConfig) < 0) {
			XSERR("Emulator engine configuration failed!\n");
			return FALSE;
		}

		/* Create the sidtune */
		myEngine->currTune = new SidTune(0);
		if (!myEngine->currTune) {
			XSERR("Could not initialize SIDTune object.\n");
			return FALSE;
		}

		return TRUE;
	}


/* Close SIDPlay2 engine
 */
	void xs_sidplay2_close(t_xs_status * myStatus)
	{
		t_xs_sidplay2 *myEngine;
		assert(myStatus);

		myEngine = (t_xs_sidplay2 *) myStatus->sidEngine;

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

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

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

		xs_sidplay2_deletesid(myStatus);

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


/* Initialize current song and sub-tune
 */
	gboolean xs_sidplay2_initsong(t_xs_status * myStatus)
	{
		t_xs_sidplay2 *myEngine;
		assert(myStatus);

		myEngine = (t_xs_sidplay2 *) myStatus->sidEngine;
		if (!myEngine)
			return FALSE;

		if (!myEngine->currTune->selectSong(myStatus->currSong)) {
			XSERR("currTune->selectSong() failed\n");
			return FALSE;
		}

		if (myEngine->currEng->load(myEngine->currTune) < 0) {
			XSERR("currEng->load() failed\n");
			return FALSE;
		}

		return TRUE;
	}


/* Emulate and render audio data to given buffer
 */
	guint xs_sidplay2_fillbuffer(t_xs_status * myStatus, gchar * audioBuffer, guint audioBufSize)
	{
		t_xs_sidplay2 *myEngine;
		assert(myStatus);

		myEngine = (t_xs_sidplay2 *) myStatus->sidEngine;
		if (!myEngine)
			return 0;

		return myEngine->currEng->play(audioBuffer, audioBufSize);
	}


/* Load a given SID-tune file
 */
	gboolean xs_sidplay2_loadsid(t_xs_status * myStatus, gchar * pcFilename)
	{
		t_xs_sidplay2 *myEngine;
		assert(myStatus);

		myEngine = (t_xs_sidplay2 *) myStatus->sidEngine;

		/* Try to get the tune */
		if (!pcFilename)
			return FALSE;
		if (!myEngine->currTune->load(pcFilename))
			return FALSE;

		return TRUE;
	}


/* Delete INTERNAL information
 */
	void xs_sidplay2_deletesid(t_xs_status * myStatus)
	{
		assert(myStatus);

		/* With the current scheme of handling sidtune-loading, we don't do anything here. */
	}


/* Return song information
 */
#define TFUNCTION	xs_sidplay2_getsidinfo
#define TTUNEINFO	SidTuneInfo
#define TTUNE		SidTune
#include "xs_sidplay.h"

}				/* extern "C" */
#endif				/* HAVE_SIDPLAY2 */