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

   Main source file

   Written by Matti "ccr" Hamalainen <ccr@tnsp.org>

   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 <pthread.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>

#include <xmms/plugin.h>

#include "xmms-sid.h"
#include "xs_support.h"
#include "xs_config.h"
#include "xs_length.h"
#include "xs_interface.h"
#include "xs_glade.h"

/*
 * Include player engines
 */
#include "xs_sidplay1.h"
#include "xs_sidplay2.h"


/*
 * Global variables
 */
static GtkWidget		*xs_ctrlwin	= NULL;
static pthread_t		xs_decode_thread;
static pthread_mutex_t		xs_mutex = PTHREAD_MUTEX_INITIALIZER;
struct t_xs_cfg			xs_cfg;


/*
 * Create sub-song control window
 */
void xs_ctrlwin_open(void)
{
 /* Create sub-song control window */
 if (xs_ctrlwin != NULL)
	{
	if (xs_cfg.alwaysRaise)
		gdk_window_raise(xs_ctrlwin->window);
	return;
	}

 xs_ctrlwin = create_xs_ctrlwin();
 gtk_widget_show(xs_ctrlwin);
}


/*
 * Initialize XMMS-SID
 */
void xs_init(void)
{
 XSDEBUG("xs_init()\n");

 /* Initialize and get configuration */
 memset(&xs_cfg, 0, sizeof(xs_cfg));

 xs_read_configuration();

 /* Initialize status */
 memset(&xs_status, 0, sizeof(xs_status));
 xs_status.allowNext = TRUE;	// Initialize to TRUE to allow first song

 /* Try to initialize emulator engine(s) */
 XSDEBUG("initializing emulator engine(s)...\n");




 /* Read song-length database */
 if (xs_cfg.songlenDBEnable && (xs_songlen_init() < 0))
	{
	XSERR("Error initializing song-length database!\n");
	}
	
 /* Initialize STIL structures */

// xs_ctrlwin_open();

// FIXME FIXME FIx ME

 XSDEBUG("OK\n");
}


/*
 * Shut down XMMS-SID
 */
void xs_close(void)
{
 XSDEBUG("xs_close(): shutting down...\n");

 /* Stop playing */
 xs_stop();

 /* Shutdown libSIDPlay(s) */






 /* Close sub-song control window */

 /* Free allocated memory */
 xs_songlen_close();

// FIXME FIXME: STIL-entries
 XSDEBUG("shutdown finished.\n");
}


/*
 * Main playing thread loop
 */
void *xs_play_loop(void *argPointer)
{
 t_xs_status myStatus;
 t_xs_tuneinfo tuneInfo;
 gboolean audioOpen;
 gint audioFreq, audioChannels, songLength;
 enum AFormat audioFmt;
 gchar audioBuffer[XS_BUFSIZE];
 gchar *tmpStr;


 pthread_mutex_lock(&xs_mutex);
 XSDEBUG("entering play thread\n");

 /* No idea, if this is really required here, but better be
  * careful since we're dealing with EVIL threads ...
  */
 if (!xs_status.allowNext)
	{
	pthread_mutex_unlock(&xs_mutex);
	pthread_exit(NULL);
	}

 /* Don't allow next song to be set yet */
 xs_status.allowNext = FALSE;
 xs_status.isPlaying = TRUE;
 memcpy(&myStatus, &xs_status, sizeof(t_xs_status));
 pthread_mutex_unlock(&xs_mutex);


 /* Copy and check audio options here (they might change in config while running) */
#ifdef HAVE_UNSIGNEDPCM
 audioFmt = (xs_cfg.fmtBitsPerSample == XS_RES_16BIT) ? FMT_U16_NE : FMT_U8;
#else
 audioFmt = (xs_cfg.fmtBitsPerSample == XS_RES_16BIT) ? FMT_S16_NE : FMT_S8;
#endif
 audioFreq = xs_cfg.fmtFrequency;
 audioChannels = (xs_cfg.fmtChannels == XS_CHN_MONO) ? 1 : 2;
 audioOpen = FALSE;

 /*
  * Main player loop: while not stopped, loop here - play subtunes
  */
 while (xs_status.isPlaying)
 {
 pthread_mutex_lock(&xs_mutex);
 myStatus.currSong = xs_status.currSong;
 myStatus.isPlaying = TRUE;
 pthread_mutex_unlock(&xs_mutex);

 XSDEBUG("subtune #%i selected, initializing...\n", myStatus.currSong);


 /* Get song length for current subtune */
 songLength = xs_songlen_get(myStatus.currFileName, myStatus.currSong);

 /* Initialize song */
#ifdef HAVE_SIDPLAY1
 if ((myStatus.currTune == NULL) || !myStatus.currTune->getStatus() ||
	!sidEmuInitializeSong(xs_emuEngine, *myStatus.currTune, myStatus.currSong))
#endif
#ifdef HAVE_SIDPLAY2
 if ()
#endif
	{
	XSERR("Couldn't initialize SID-tune '%s' (sub-tune #%i)!\n",
		myStatus.currFileName, myStatus.currSong);
	goto err_exit;
	}

 myStatus.currTune->getInfo(tuneInfo);


 /* Set information for current sub-tune */
 tmpStr = xs_filetitle_get(myStatus.currFileName, &tuneInfo, myStatus.currSong);

 xs_plugin_ip.set_info(tmpStr, (songLength > 0) ? songLength * 1000 : -1,
 1000 * (tuneInfo.songSpeed ? tuneInfo.songSpeed : (tuneInfo.clockSpeed == SIDTUNE_CLOCK_NTSC) ? 60 : 50),
 audioFreq, audioChannels);
 g_free(tmpStr);

 /* Open the audio output */
 if (!xs_plugin_ip.output->open_audio(audioFmt, audioFreq, audioChannels))
	{
	XSERR("Couldn't open XMMS audio output!\n");
	pthread_mutex_lock(&xs_mutex);
	xs_status.isError = TRUE;
	pthread_mutex_unlock(&xs_mutex);
	goto err_exit;
	}

 audioOpen = TRUE;

 /*
  * Play the subtune
  */
 while (xs_status.isPlaying && myStatus.isPlaying && (xs_status.currSong == myStatus.currSong))
	{
	/* Render audio data */
#ifdef HAVE_SIDPLAY1
	sidEmuFillBuffer(xs_emuEngine, *myStatus.currTune, audioBuffer, XS_BUFSIZE);
#endif
#ifdef HAVE_SIDPLAY2
#endif

	/* I <3 visualice/haujobb */
	xs_plugin_ip.add_vis_pcm(
		xs_plugin_ip.output->written_time(),
		audioFmt, audioChannels, XS_BUFSIZE, audioBuffer);

	/* Wait a little */
	while (xs_status.isPlaying &&
		(xs_status.currSong == myStatus.currSong) &&
		(xs_plugin_ip.output->buffer_free() < XS_BUFSIZE))
		xmms_usleep(10000);

	/* Output audio */
	if (xs_status.isPlaying && (xs_status.currSong == myStatus.currSong))
		xs_plugin_ip.output->write_audio(audioBuffer, XS_BUFSIZE);

	/* Check if we have played enough */
	if (xs_cfg.playMaxTimeEnable)
		{
		if (xs_cfg.playMaxTimeUnknown)
			{
			if ((songLength == -1) &&
				(xs_plugin_ip.output->output_time() >= (xs_cfg.playMaxTime * 1000)))
				myStatus.isPlaying = FALSE;
			} else {
			if (xs_plugin_ip.output->output_time() >= (xs_cfg.playMaxTime * 1000))
				myStatus.isPlaying = FALSE;
			}
		}

	if (songLength > 0)
		{
		if (xs_plugin_ip.output->output_time() >= (songLength * 1000))
			myStatus.isPlaying = FALSE;
		}
	}

 XSDEBUG("subtune ended/stopped\n");

 /* Close audio */
 if (audioOpen)
	{
	XSDEBUG("close audio #1\n");
	xs_plugin_ip.output->close_audio();
	audioOpen = FALSE;
	}

 /* Now determine if we continue by selecting other subtune or something */
 if (!myStatus.isPlaying) xs_status.isPlaying = FALSE;
 }

 /* When exiting, delete data */
err_exit:
 pthread_mutex_lock(&xs_mutex);
 xs_status.isPlaying = FALSE;
 pthread_mutex_unlock(&xs_mutex);

 if (audioOpen)
	{
	XSDEBUG("close audio #2\n");
	xs_plugin_ip.output->close_audio();
	}

 if (myStatus.currTune != NULL)
	{
	delete myStatus.currTune;
	myStatus.currTune = NULL;
	}

 g_free(myStatus.currFileName);

 /* Exit the playing thread */
 XSDEBUG("exiting thread, bye.\n");

 /* Last thing we do is set allowNext to TRUE to flag
  * that we have ended all action in the thread
  */
 pthread_mutex_lock(&xs_mutex);
 xs_status.allowNext = TRUE;
 pthread_mutex_unlock(&xs_mutex);

 pthread_exit(NULL);
}


/*
 * Start playing the given file
 */
void xs_play_file(char *pcFileName)
{
}


/*
 * Stop playing
 */
void xs_stop(void)
{
 /* If playing, stop. */
 XSDEBUG("STOP_REQ\n");
 if (xs_status.isPlaying || !xs_status.allowNext)
	{
	XSDEBUG("stopping...\n");
	pthread_mutex_lock(&xs_mutex);
	xs_status.isPlaying = FALSE;
	pthread_mutex_unlock(&xs_mutex);
	pthread_join(xs_decode_thread, NULL);
	}
}


/*
 * Pause the playing
 */
void xs_pause(short pauseState)
{
 xs_plugin_ip.output->pause(pauseState);
}


/*
 * Set the time-seek position
 * (the playing thread will do the "seeking" aka song-change)
 */
void xs_seek(gint iTime)
{
 /* If we have song-position patch, check settings */
#ifdef HAVE_SONG_POSITION
 pthread_mutex_lock(&xs_mutex);

 if ((iTime > 0) && (iTime <= xs_status.nSongs) && xs_status.isPlaying)
	xs_status.currSong = iTime;

 pthread_mutex_unlock(&xs_mutex);
#endif
}


/*
 * Return the playing "position/time"
 */
gint xs_get_time(void)
{
 /* If errorflag is set, return -2 to signal it to XMMS's idle callback */
 if (xs_status.isError)
	return -2;

 /* If tune has ended, return -1 */
 if (xs_status.allowNext && !xs_status.isPlaying)
	return -1;

 /* Obsolete? */
#ifdef HAVE_SONG_POSITION
 pthread_mutex_lock(&xs_mutex);
 set_song_position(xs_status.currSong, 1, xs_status.nSongs);
 pthread_mutex_unlock(&xs_mutex);
#endif

 /* Else, return output time reported by audio output plugin */
 return xs_plugin_ip.output->output_time();
}