q3rally/engine/code/client/cl_cin_ogm.c

/*
===========================================================================
Copyright (C) 2008 Stefan Langer <raute@users.sourceforge.net>

This file is part of Spearmint Source Code.

Spearmint Source Code 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 3 of the License,
or (at your option) any later version.

Spearmint Source Code 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 Spearmint Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, Spearmint Source Code is also subject to certain additional terms.
You should have received a copy of these additional terms immediately following
the terms and conditions of the GNU General Public License.  If not, please
request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional
terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc.,
Suite 120, Rockville, Maryland 20850 USA.
===========================================================================
*/

/*

  This is a "ogm"-decoder to use a "better"(smaller files,higher resolutions) Cinematic-Format than roq

  In this code "ogm" is only: ogg wrapper, vorbis audio, xvid video (or theora video)
    (ogm(Ogg Media) in general is ogg wrapper with all kind of audio/video/subtitle/...)

... infos used for this src:
xvid:
 * examples/xvid_decraw.c
 * xvid.h
ogg/vobis:
 * decoder_example.c (libvorbis src)
 * libogg Documentation ( http://www.xiph.org/ogg/doc/libogg/ )
 * VLC ogg demux ( http://trac.videolan.org/vlc/browser/trunk/modules/demux/ogg.c )
theora:
 * theora doxygen docs (1.0beta1)
*/

#if defined(USE_CODEC_VORBIS) && (defined(USE_CIN_XVID) || defined(USE_CIN_THEORA))

#include <ogg/ogg.h>
#include <vorbis/codec.h>

#ifdef USE_CIN_XVID
#include <xvid.h>
#endif
#ifdef USE_CIN_THEORA
#include <theora/theora.h>
#endif

#include "client.h"
#include "snd_local.h"

#define OGG_BUFFER_SIZE	8*1024	//4096

typedef struct
{
	fileHandle_t    ogmFile;

	ogg_sync_state  oy;			/* sync and verify incoming physical bitstream */
	//ogg_stream_state os; /* take physical pages, weld into a logical stream of packets */
	ogg_stream_state os_audio;
	ogg_stream_state os_video;

	vorbis_dsp_state vd;		/* central working state for the packet->PCM decoder */
	vorbis_info     vi;			/* struct that stores all the static vorbis bitstream settings */
	vorbis_comment  vc;			/* struct that stores all the bitstream user comments */

	qboolean        videoStreamIsXvid;	//FIXME: atm there isn't realy a check for this (all "video" streams are handelt as xvid, because xvid support more than one "subtype")
#ifdef USE_CIN_XVID
	xvid_dec_stats_t xvid_dec_stats;
	void           *xvid_dec_handle;
#endif
	qboolean        videoStreamIsTheora;
#ifdef USE_CIN_THEORA
	theora_info     th_info;	// dump_video.c(example decoder): ti
	theora_comment  th_comment;	// dump_video.c(example decoder): tc
	theora_state    th_state;	// dump_video.c(example decoder): td

	yuv_buffer      th_yuvbuffer;
#endif

	unsigned char  *outputBuffer;
	int             outputWidht;
	int             outputHeight;
	int             outputBufferSize;	// in Pixel (so "real Bytesize" = outputBufferSize*4)
	int             VFrameCount;	// output video-stream
	ogg_int64_t     Vtime_unit;
	int             currentTime;	// input from Run-function
} cin_ogm_t;

static cin_ogm_t g_ogm;

int             nextNeededVFrame(void);


/* ####################### #######################

  XVID

*/
#ifdef USE_CIN_XVID

#define BPP 4

static int init_xvid(void)
{
	int             ret;

	xvid_gbl_init_t xvid_gbl_init;
	xvid_dec_create_t xvid_dec_create;

	/* Reset the structure with zeros */
	memset(&xvid_gbl_init, 0, sizeof(xvid_gbl_init_t));
	memset(&xvid_dec_create, 0, sizeof(xvid_dec_create_t));

	/* Version */
	xvid_gbl_init.version = XVID_VERSION;

	xvid_gbl_init.cpu_flags = 0;
	xvid_gbl_init.debug = 0;

	xvid_global(NULL, 0, &xvid_gbl_init, NULL);

	/* Version */
	xvid_dec_create.version = XVID_VERSION;

	/*
	 * Image dimensions -- set to 0, xvidcore will resize when ever it is
	 * needed
	 */
	xvid_dec_create.width = 0;
	xvid_dec_create.height = 0;

	ret = xvid_decore(NULL, XVID_DEC_CREATE, &xvid_dec_create, NULL);

	g_ogm.xvid_dec_handle = xvid_dec_create.handle;

	return (ret);
}

static int dec_xvid(unsigned char *input, int input_size)
{
	int             ret;

	xvid_dec_frame_t xvid_dec_frame;

	/* Reset all structures */
	memset(&xvid_dec_frame, 0, sizeof(xvid_dec_frame_t));
	memset(&g_ogm.xvid_dec_stats, 0, sizeof(xvid_dec_stats_t));

	/* Set version */
	xvid_dec_frame.version = XVID_VERSION;
	g_ogm.xvid_dec_stats.version = XVID_VERSION;

	/* No general flags to set */
	xvid_dec_frame.general = XVID_LOWDELAY;	//0;

	/* Input stream */
	xvid_dec_frame.bitstream = input;
	xvid_dec_frame.length = input_size;

	/* Output frame structure */
	xvid_dec_frame.output.plane[0] = g_ogm.outputBuffer;
	xvid_dec_frame.output.stride[0] = g_ogm.outputWidht * BPP;
	if(g_ogm.outputBuffer == NULL)
		xvid_dec_frame.output.csp = XVID_CSP_NULL;
	else
		xvid_dec_frame.output.csp = XVID_CSP_RGBA;	// example was with XVID_CSP_I420

	ret = xvid_decore(g_ogm.xvid_dec_handle, XVID_DEC_DECODE, &xvid_dec_frame, &g_ogm.xvid_dec_stats);

	return (ret);
}

static int shutdown_xvid(void)
{
	int             ret = 0;

	if(g_ogm.xvid_dec_handle)
		ret = xvid_decore(g_ogm.xvid_dec_handle, XVID_DEC_DESTROY, NULL, NULL);

	return (ret);
}
#endif

/* ####################### #######################

  OGG/OGM
  ... also calls to vorbis/theora-libs

*/

/*
  loadBlockToSync

  return:
  !0 -> no data transferred
*/
static int loadBlockToSync(void)
{
	int             r = -1;
	char           *buffer;
	int             bytes;

	if(g_ogm.ogmFile)
	{
		buffer = ogg_sync_buffer(&g_ogm.oy, OGG_BUFFER_SIZE);
		bytes = FS_Read(buffer, OGG_BUFFER_SIZE, g_ogm.ogmFile);
		ogg_sync_wrote(&g_ogm.oy, bytes);

		r = (bytes == 0);
	}

	return r;
}

/*
  loadPagesToStreams

  return:
  !0 -> no data transferred (or not for all Streams)
*/
static int loadPagesToStreams(void)
{
	int             r = -1;
	int             AudioPages = 0;
	int             VideoPages = 0;
	ogg_stream_state *osptr = NULL;
	ogg_page        og;

	while(!AudioPages || !VideoPages)
	{
		if(ogg_sync_pageout(&g_ogm.oy, &og) != 1)
			break;

		if(g_ogm.os_audio.serialno == ogg_page_serialno(&og))
		{
			osptr = &g_ogm.os_audio;
			++AudioPages;
		}
		if(g_ogm.os_video.serialno == ogg_page_serialno(&og))
		{
			osptr = &g_ogm.os_video;
			++VideoPages;
		}

		if(osptr != NULL)
		{
			ogg_stream_pagein(osptr, &og);
		}
	}

	if(AudioPages && VideoPages)
		r = 0;

	return r;
}

#define SIZEOF_RAWBUFF 4*1024
static byte     rawBuffer[SIZEOF_RAWBUFF];

#define MIN_AUDIO_PRELOAD 400	// in ms
#define MAX_AUDIO_PRELOAD 500	// in ms


/*

  return: audio wants more packets
*/
static qboolean loadAudio(void)
{
	qboolean        anyDataTransferred = qtrue;
	float         **pcm;
	float          *right, *left;
	int             samples, samplesNeeded;
	int             i;
	short          *ptr;
	ogg_packet      op;
	vorbis_block    vb;

	memset(&op, 0, sizeof(op));
	memset(&vb, 0, sizeof(vb));
	vorbis_block_init(&g_ogm.vd, &vb);

	while(anyDataTransferred && g_ogm.currentTime + MAX_AUDIO_PRELOAD > (int)(g_ogm.vd.granulepos * 1000 / g_ogm.vi.rate))
	{
		anyDataTransferred = qfalse;

		if((samples = vorbis_synthesis_pcmout(&g_ogm.vd, &pcm)) > 0)
		{
			// vorbis -> raw
			ptr = (short *)rawBuffer;
			samplesNeeded = (SIZEOF_RAWBUFF) / (2 * 2);	// (width*channel)
			if(samples < samplesNeeded)
				samplesNeeded = samples;

			left = pcm[0];
			right = (g_ogm.vi.channels > 1) ? pcm[1] : pcm[0];
			for(i = 0; i < samplesNeeded; ++i)
			{
				ptr[0] = (left[i] >= -1.0f &&
						  left[i] <= 1.0f) ? left[i] * 32767.f : 32767 * ((left[i] > 0.0f) - (left[i] < 0.0f));
				ptr[1] = (right[i] >= -1.0f &&
						  right[i] <= 1.0f) ? right[i] * 32767.f : 32767 * ((right[i] > 0.0f) - (right[i] < 0.0f));
				ptr += 2;		//numChans;
			}

			if(i > 0)
			{
				// tell libvorbis how many samples we actually consumed
				vorbis_synthesis_read(&g_ogm.vd, i);

//              S_RawSamples(ssize, 22050, 2, 2, (byte *)sbuf, 1.0f, -1);
				S_RawSamples(0, i, g_ogm.vi.rate, 2, 2, rawBuffer, 1.0f, -1);

				anyDataTransferred = qtrue;
			}
		}

		if(!anyDataTransferred)
		{
			// op -> vorbis
			if(ogg_stream_packetout(&g_ogm.os_audio, &op))
			{
				if(vorbis_synthesis(&vb, &op) == 0)
					vorbis_synthesis_blockin(&g_ogm.vd, &vb);
				anyDataTransferred = qtrue;
			}
		}
	}

	vorbis_block_clear(&vb);

	if(g_ogm.currentTime + MIN_AUDIO_PRELOAD > (int)(g_ogm.vd.granulepos * 1000 / g_ogm.vi.rate))
		return qtrue;
	else
		return qfalse;
}

/*

  return:	1	-> loaded a new Frame ( g_ogm.outputBuffer points to the actual frame )
			0	-> no new Frame
			<0	-> error
*/
#ifdef USE_CIN_XVID
static int loadVideoFrameXvid(void)
{
	int             r = 0;
	ogg_packet      op;
	int             used_bytes = 0;

	memset(&op, 0, sizeof(op));

	while(!r && (ogg_stream_packetout(&g_ogm.os_video, &op)))
	{
		used_bytes = dec_xvid(op.packet, op.bytes);
		if(g_ogm.xvid_dec_stats.type == XVID_TYPE_VOL)
		{
			if(g_ogm.outputWidht != g_ogm.xvid_dec_stats.data.vol.width ||
			   g_ogm.outputHeight != g_ogm.xvid_dec_stats.data.vol.height)
			{
				g_ogm.outputWidht = g_ogm.xvid_dec_stats.data.vol.width;
				g_ogm.outputHeight = g_ogm.xvid_dec_stats.data.vol.height;
				Com_DPrintf("[XVID]new resolution %dx%d\n", g_ogm.outputWidht, g_ogm.outputHeight);
			}

			if(g_ogm.outputBufferSize < g_ogm.xvid_dec_stats.data.vol.width * g_ogm.xvid_dec_stats.data.vol.height)
			{

				g_ogm.outputBufferSize = g_ogm.xvid_dec_stats.data.vol.width * g_ogm.xvid_dec_stats.data.vol.height;

				/* Free old output buffer */
				if(g_ogm.outputBuffer)
					free(g_ogm.outputBuffer);

				/* Allocate the new buffer */
				g_ogm.outputBuffer = (unsigned char *)malloc(g_ogm.outputBufferSize * 4);	//FIXME? should the 4 stay for BPP?
				if(g_ogm.outputBuffer == NULL)
				{
					g_ogm.outputBufferSize = 0;
					r = -2;
					break;
				}
			}

			// use the rest of this packet
			used_bytes += dec_xvid(op.packet + used_bytes, op.bytes - used_bytes);
		}

		// we got a real output frame ...
		if(g_ogm.xvid_dec_stats.type > 0)
		{
			r = 1;

			++g_ogm.VFrameCount;
//          Com_Printf("frame infos: %d %d %d\n", xvid_dec_stats.data.vop.general, xvid_dec_stats.data.vop.time_base, xvid_dec_stats.data.vop.time_increment);
//          Com_Printf("frame info time: %d (Frame# %d, %d)\n", xvid_dec_stats.data.vop.time_base, VFrameCount, (int)(VFrameCount*Vtime_unit/10000000));
		}

//      if((op.bytes-used_bytes)>0)
//          Com_Printf("unused: %d(firstChar: %X)\n",(op.bytes-used_bytes),(int)(op.packet[used_bytes]));
	}

	return r;
}
#endif

/*

  return:	1	-> loaded a new Frame ( g_ogm.outputBuffer points to the actual frame )
			0	-> no new Frame
			<0	-> error
*/
#ifdef USE_CIN_THEORA
/*
how many >> are needed to make y==x (shifting y>>i)
return: -1	-> no match
		>=0	-> number of shifts
*/
static int findSizeShift(int x, int y)
{
	int             i;

	for(i = 0; (y >> i); ++i)
		if(x == (y >> i))
			return i;

	return -1;
}

static int loadVideoFrameTheora(void)
{
	int             r = 0;
	ogg_packet      op;

	memset(&op, 0, sizeof(op));

	while(!r && (ogg_stream_packetout(&g_ogm.os_video, &op)))
	{
		ogg_int64_t     th_frame;

		theora_decode_packetin(&g_ogm.th_state, &op);

		th_frame = theora_granule_frame(&g_ogm.th_state, g_ogm.th_state.granulepos);

		if((g_ogm.VFrameCount < th_frame && th_frame >= nextNeededVFrame()) || !g_ogm.outputBuffer)
		{
//          int i,j;
			int             yWShift, uvWShift;
			int             yHShift, uvHShift;

			if(theora_decode_YUVout(&g_ogm.th_state, &g_ogm.th_yuvbuffer))
				continue;

			if(g_ogm.outputWidht != g_ogm.th_info.width || g_ogm.outputHeight != g_ogm.th_info.height)
			{
				g_ogm.outputWidht = g_ogm.th_info.width;
				g_ogm.outputHeight = g_ogm.th_info.height;
				Com_DPrintf("[Theora(ogg)]new resolution %dx%d\n", g_ogm.outputWidht, g_ogm.outputHeight);
			}

			if(g_ogm.outputBufferSize < g_ogm.th_info.width * g_ogm.th_info.height)
			{

				g_ogm.outputBufferSize = g_ogm.th_info.width * g_ogm.th_info.height;

				/* Free old output buffer */
				if(g_ogm.outputBuffer)
					free(g_ogm.outputBuffer);

				/* Allocate the new buffer */
				g_ogm.outputBuffer = (unsigned char *)malloc(g_ogm.outputBufferSize * 4);
				if(g_ogm.outputBuffer == NULL)
				{
					g_ogm.outputBufferSize = 0;
					r = -2;
					break;
				}
			}

			yWShift = findSizeShift(g_ogm.th_yuvbuffer.y_width, g_ogm.th_info.width);
			uvWShift = findSizeShift(g_ogm.th_yuvbuffer.uv_width, g_ogm.th_info.width);
			yHShift = findSizeShift(g_ogm.th_yuvbuffer.y_height, g_ogm.th_info.height);
			uvHShift = findSizeShift(g_ogm.th_yuvbuffer.uv_height, g_ogm.th_info.height);

			if(yWShift < 0 || uvWShift < 0 || yHShift < 0 || uvHShift < 0)
			{
				Com_Printf("[Theora] unexpected resolution in a yuv-Frame\n");
				r = -1;
			}
			else
			{

				Frame_yuv_to_rgb24(g_ogm.th_yuvbuffer.y, g_ogm.th_yuvbuffer.u, g_ogm.th_yuvbuffer.v,
								   g_ogm.th_info.width, g_ogm.th_info.height, g_ogm.th_yuvbuffer.y_stride,
								   g_ogm.th_yuvbuffer.uv_stride, yWShift, uvWShift, yHShift, uvHShift,
								   (unsigned int *)g_ogm.outputBuffer);

/*				unsigned char*	pixelPtr = g_ogm.outputBuffer;
				unsigned int*	pixPtr;
				pixPtr = (unsigned int*)g_ogm.outputBuffer;

				//TODO: use one yuv->rgb funktion for the hole frame (the big amout of stack movement(yuv->rgb calls) couldn't be good ;) )
				for(j=0;j<g_ogm.th_info.height;++j) {
					for(i=0;i<g_ogm.th_info.width;++i) {
#if 1
						// simple grayscale-output ^^
						pixelPtr[0] =
							pixelPtr[1] =
							pixelPtr[2] = g_ogm.th_yuvbuffer.y[i+j*g_ogm.th_yuvbuffer.y_stride];
						pixelPtr+=4;

#else
						// using RoQ yuv->rgb code
						*pixPtr++ = yuv_to_rgb24( g_ogm.th_yuvbuffer.y[(i>>yWShift)+(j>>yHShift)*g_ogm.th_yuvbuffer.y_stride],
												g_ogm.th_yuvbuffer.u[(i>>uvWShift)+(j>>uvHShift)*g_ogm.th_yuvbuffer.uv_stride],
												g_ogm.th_yuvbuffer.v[(i>>uvWShift)+(j>>uvHShift)*g_ogm.th_yuvbuffer.uv_stride]);
#endif
					}
				}
*/

				r = 1;
				g_ogm.VFrameCount = th_frame;
			}
		}


	}

	return r;
}
#endif


/*

  return:	1	-> loaded a new Frame ( g_ogm.outputBuffer points to the actual frame )
			0	-> no new Frame
			<0	-> error
*/
static int loadVideoFrame(void)
{
#ifdef USE_CIN_XVID
	if(g_ogm.videoStreamIsXvid)
		return loadVideoFrameXvid();
#endif
#ifdef USE_CIN_THEORA
	if(g_ogm.videoStreamIsTheora)
		return loadVideoFrameTheora();
#endif

	// if we come to this point, there will be no codec that use the stream content ...
	if(g_ogm.os_video.serialno)
	{
		ogg_packet      op;

		while(ogg_stream_packetout(&g_ogm.os_video, &op));
	}

	return 1;
}

/*

  return: qtrue => noDataTransferred
*/
static qboolean loadFrame(void)
{
	qboolean        anyDataTransferred = qtrue;
	qboolean        needVOutputData = qtrue;

//  qboolean audioSDone = qfalse;
//  qboolean videoSDone = qfalse;
	qboolean        audioWantsMoreData = qfalse;
	int             status;

	while(anyDataTransferred && (needVOutputData || audioWantsMoreData))
	{
		anyDataTransferred = qfalse;

//      xvid -> "gl" ? videoDone : needPacket
//      vorbis -> raw sound ? audioDone : needPacket
//      anyDataTransferred = videoDone && audioDone;
//      needVOutputData = videoDone && audioDone;
//      if needPacket
		{
//          videoStream -> xvid ? videoStreamDone : needPage
//          audioSteam -> vorbis ? audioStreamDone : needPage
//          anyDataTransferred = audioStreamDone && audioStreamDone;

			if(needVOutputData && (status = loadVideoFrame()))
			{
				needVOutputData = qfalse;
				if(status > 0)
					anyDataTransferred = qtrue;
				else
					anyDataTransferred = qfalse;	// error (we don't need any videodata and we had no transferred)
			}

//          if needPage
			if(needVOutputData || audioWantsMoreData)
			{
				// try to transfer Pages to the audio- and video-Stream
				if(loadPagesToStreams())
				{
					// try to load a datablock from file
					anyDataTransferred |= !loadBlockToSync();
				}
				else
					anyDataTransferred = qtrue;	// successful loadPagesToStreams()
			}

			// load all Audio after loading new pages ...
			if(g_ogm.VFrameCount > 1)	// wait some videoframes (it's better to have some delay, than a lagy sound)
				audioWantsMoreData = loadAudio();
		}
	}

//  ogg_packet_clear(&op);

	return !anyDataTransferred;
}

//from VLC ogg.c ( http://trac.videolan.org/vlc/browser/trunk/modules/demux/ogg.c )
typedef struct
{
	char            streamtype[8];
	char            subtype[4];

	ogg_int32_t     size;		/* size of the structure */

	ogg_int64_t     time_unit;	/* in reference time */// in 10^-7 seconds (dT between frames)
	ogg_int64_t     samples_per_unit;
	ogg_int32_t     default_len;	/* in media time */

	ogg_int32_t     buffersize;
	ogg_int16_t     bits_per_sample;

	union
	{
		struct
		{
			ogg_int32_t     width;
			ogg_int32_t     height;
		} stream_header_video;

		struct
		{
			ogg_int16_t     channels;
			ogg_int16_t     blockalign;
			ogg_int32_t     avgbytespersec;
		} stream_header_audio;
	} sh;
} stream_header_t;

qboolean isPowerOf2(int x)
{
	int             bitsSet = 0;
	int             i;

	for(i = 0; i < sizeof(int) * 8; ++i)
		if(x & (1 << i))
			++bitsSet;

	return (bitsSet <= 1);
}

/*

  return: 0 -> no problem
*/
//TODO: vorbis/theora-header&init in sub-functions
//TODO: "clean" error-returns ...
int Cin_OGM_Init(const char *filename)
{
	int             status;
	ogg_page        og;
	ogg_packet      op;
	int             i;

	if(g_ogm.ogmFile)
	{
		Com_Printf(S_COLOR_YELLOW "WARNING: it seams there was already a ogm running, it will be killed to start %s\n", filename);
		Cin_OGM_Shutdown();
	}

	memset(&g_ogm, 0, sizeof(cin_ogm_t));

	FS_FOpenFileRead(filename, &g_ogm.ogmFile, qtrue);
	if(!g_ogm.ogmFile)
	{
		Com_Printf(S_COLOR_YELLOW "WARNING: Can't open ogm-file for reading (%s)\n", filename);
		return -1;
	}

	ogg_sync_init(&g_ogm.oy);	/* Now we can read pages */

	//FIXME? can serialno be 0 in ogg? (better way to check inited?)
	//TODO: support for more than one audio stream? / detect files with one stream(or without correct ones)
	while(!g_ogm.os_audio.serialno || !g_ogm.os_video.serialno)
	{
		if(ogg_sync_pageout(&g_ogm.oy, &og) == 1)
		{
			if(strstr((char *)(og.body + 1), "vorbis"))
			{
				//FIXME? better way to find audio stream
				if(g_ogm.os_audio.serialno)
				{
					Com_Printf(S_COLOR_YELLOW "WARNING: more than one audio stream, in ogm-file(%s) ... we will stay at the first one\n", filename);
				}
				else
				{
					ogg_stream_init(&g_ogm.os_audio, ogg_page_serialno(&og));
					ogg_stream_pagein(&g_ogm.os_audio, &og);
				}
			}
#ifdef USE_CIN_THEORA
			if(strstr((char *)(og.body + 1), "theora"))
			{
				if(g_ogm.os_video.serialno)
				{
					Com_Printf(S_COLOR_YELLOW "WARNING: more than one video stream, in ogm-file(%s) ... we will stay at the first one\n", filename);
				}
				else
				{
					g_ogm.videoStreamIsTheora = qtrue;
					ogg_stream_init(&g_ogm.os_video, ogg_page_serialno(&og));
					ogg_stream_pagein(&g_ogm.os_video, &og);
				}
			}
#endif
#ifdef USE_CIN_XVID
			if(strstr((char *)(og.body + 1), "video"))
			{					//FIXME? better way to find video stream
				if(g_ogm.os_video.serialno)
				{
					Com_Printf("more than one video stream, in ogm-file(%s) ... we will stay at the first one\n", filename);
				}
				else
				{
					stream_header_t *sh;

					g_ogm.videoStreamIsXvid = qtrue;

					sh = (stream_header_t *) (og.body + 1);
					//TODO: one solution for checking xvid and theora
					if(!isPowerOf2(sh->sh.stream_header_video.width))
					{
						Com_Printf("VideoWidth of the ogm-file isn't a power of 2 value (%s)\n", filename);

						return -5;
					}
					if(!isPowerOf2(sh->sh.stream_header_video.height))
					{
						Com_Printf("VideoHeight of the ogm-file isn't a power of 2 value (%s)\n", filename);

						return -6;
					}

					g_ogm.Vtime_unit = sh->time_unit;

					ogg_stream_init(&g_ogm.os_video, ogg_page_serialno(&og));
					ogg_stream_pagein(&g_ogm.os_video, &og);
				}
			}
#endif
		}
		else if(loadBlockToSync())
			break;
	}

	if(g_ogm.videoStreamIsXvid && g_ogm.videoStreamIsTheora)
	{
		Com_Printf(S_COLOR_YELLOW "WARNING: Found \"video\"- and \"theora\"-stream ,ogm-file (%s)\n", filename);
		return -2;
	}

#if 1
	if(!g_ogm.os_audio.serialno)
	{
		Com_Printf(S_COLOR_YELLOW "WARNING: Haven't found a audio(vorbis) stream in ogm-file (%s)\n", filename);
		return -2;
	}
#endif
	if(!g_ogm.os_video.serialno)
	{
		Com_Printf(S_COLOR_YELLOW "WARNING: Haven't found a video stream in ogm-file (%s)\n", filename);
		return -3;
	}

	//load vorbis header
	vorbis_info_init(&g_ogm.vi);
	vorbis_comment_init(&g_ogm.vc);
	i = 0;
	while(i < 3)
	{
		status = ogg_stream_packetout(&g_ogm.os_audio, &op);
		if(status < 0)
		{
			Com_Printf(S_COLOR_YELLOW "WARNING: Corrupt ogg packet while loading vorbis-headers, ogm-file(%s)\n", filename);
			return -8;
		}
		if(status > 0)
		{
			status = vorbis_synthesis_headerin(&g_ogm.vi, &g_ogm.vc, &op);
			if(i == 0 && status < 0)
			{
				Com_Printf(S_COLOR_YELLOW "WARNING: This Ogg bitstream does not contain Vorbis audio data, ogm-file(%s)\n", filename);
				return -9;
			}
			++i;
		}
		else if(loadPagesToStreams())
		{
			if(loadBlockToSync())
			{
				Com_Printf(S_COLOR_YELLOW "WARNING: Couldn't find all vorbis headers before end of ogm-file (%s)\n", filename);
				return -10;
			}
		}
	}

	vorbis_synthesis_init(&g_ogm.vd, &g_ogm.vi);

#ifdef USE_CIN_XVID
	status = init_xvid();
	if(status)
	{
		Com_Printf("[Xvid]Decore INIT problem, return value %d(ogm-file: %s)\n", status, filename);

		return -4;
	}
#endif

#ifdef USE_CIN_THEORA
	if(g_ogm.videoStreamIsTheora)
	{
		ROQ_GenYUVTables();

		theora_info_init(&g_ogm.th_info);
		theora_comment_init(&g_ogm.th_comment);

		i = 0;
		while(i < 3)
		{
			status = ogg_stream_packetout(&g_ogm.os_video, &op);
			if(status < 0)
			{
				Com_Printf(S_COLOR_YELLOW "WARNING: Corrupt ogg packet while loading theora-headers, ogm-file(%s)\n", filename);
				return -8;
			}
			if(status > 0)
			{
				status = theora_decode_header(&g_ogm.th_info, &g_ogm.th_comment, &op);
				if(i == 0 && status != 0)
				{
					Com_Printf(S_COLOR_YELLOW "WARNING: This Ogg bitstream does not contain theora data, ogm-file(%s)\n", filename);
					return -9;
				}
				++i;
			}
			else if(loadPagesToStreams())
			{
				if(loadBlockToSync())
				{
					Com_Printf(S_COLOR_YELLOW "WARNING: Couldn't find all theora headers before end of ogm-file (%s)\n", filename);
					return -10;
				}
			}
		}

		theora_decode_init(&g_ogm.th_state, &g_ogm.th_info);

		if(!isPowerOf2(g_ogm.th_info.width))
		{
			Com_Printf(S_COLOR_YELLOW "WARNING: VideoWidth of the ogm-file isn't a power of 2 value (%s)\n", filename);
			return -5;
		}
		if(!isPowerOf2(g_ogm.th_info.height))
		{
			Com_Printf(S_COLOR_YELLOW "WARNING: VideoHeight of the ogm-file isn't a power of 2 value (%s)\n", filename);
			return -6;
		}

		g_ogm.Vtime_unit = ((ogg_int64_t) g_ogm.th_info.fps_denominator * 1000 * 10000 / g_ogm.th_info.fps_numerator);
	}
#endif

	Com_DPrintf("OGM-Init done (%s)\n", filename);

	return 0;
}

int nextNeededVFrame(void)
{
	return (int)(g_ogm.currentTime * (ogg_int64_t) 10000 / g_ogm.Vtime_unit);
}

/*

  time ~> time in ms to which the movie should run
  return:	0 => nothing special
			1 => eof
*/
int Cin_OGM_Run(int time)
{

	g_ogm.currentTime = time;

	while(!g_ogm.VFrameCount || time + 20 >= (int)(g_ogm.VFrameCount * g_ogm.Vtime_unit / 10000))
	{
		if(loadFrame())
			return 1;
	}

	return 0;
}

/*
  Gives a Pointer to the current Output-Buffer
  and the Resolution
*/
unsigned char  *Cin_OGM_GetOutput(int *outWidth, int *outHeight)
{
	if(outWidth != NULL)
		*outWidth = g_ogm.outputWidht;
	if(outHeight != NULL)
		*outHeight = g_ogm.outputHeight;

	return g_ogm.outputBuffer;
}

void Cin_OGM_Shutdown()
{
#ifdef USE_CIN_XVID
	int             status;

	status = shutdown_xvid();
	if(status)
		Com_Printf("[Xvid]Decore RELEASE problem, return value %d\n", status);
#endif

#ifdef USE_CIN_THEORA
	theora_clear(&g_ogm.th_state);
	theora_comment_clear(&g_ogm.th_comment);
	theora_info_clear(&g_ogm.th_info);
#endif

	if(g_ogm.outputBuffer)
		free(g_ogm.outputBuffer);
	g_ogm.outputBuffer = NULL;

	vorbis_dsp_clear(&g_ogm.vd);
	vorbis_comment_clear(&g_ogm.vc);
	vorbis_info_clear(&g_ogm.vi);	/* must be called last (comment from vorbis example code) */

	ogg_stream_clear(&g_ogm.os_audio);
	ogg_stream_clear(&g_ogm.os_video);

	ogg_sync_clear(&g_ogm.oy);

	FS_FCloseFile(g_ogm.ogmFile);
	g_ogm.ogmFile = 0;
}

#else
int Cin_OGM_Init(const char *filename)
{
	return 1;
}
int Cin_OGM_Run(int time)
{
	return 1;
}
unsigned char *Cin_OGM_GetOutput(int *outWidth, int *outHeight)
{
	return 0;
}

void Cin_OGM_Shutdown(void)
{
	return;
}
#endif