--- codec.c	2003/02/22 08:24:01	1.1
+++ codec.c	2003/06/02 11:47:30	1.1.2.9
@@ -0,0 +1,890 @@
+/**************************************************************************
+ *
+ *	XVID VFW FRONTEND
+ *	codec
+ *
+ *	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.
+ *
+ *************************************************************************/
+
+/**************************************************************************
+ *
+ *	History:
+ *
+ *	12.07.2002	num_threads
+ *	23.06.2002	XVID_CPU_CHKONLY; loading speed up
+ *	25.04.2002	ICDECOMPRESS_PREROLL
+ *	17.04.2002	re-enabled lumi masking for 1st pass
+ *	15.04.2002	updated cbr support
+ *	04.04.2002	separated 2-pass code to 2pass.c
+ *				interlacing support
+ *				hinted ME support
+ *	23.03.2002	daniel smith <danielsmith@astroboymail.com>
+ *				changed inter4v to only be in modes 5 or 6
+ *				fixed null mode crash ?
+ *				merged foxer's alternative 2-pass code
+ *				added DEBUGERR output on errors instead of returning
+ *	16.03.2002	daniel smith <danielsmith@astroboymail.com>
+ *				changed BITMAPV4HEADER to BITMAPINFOHEADER
+ *					- prevents memcpy crash in compress_get_format()
+ *				credits are processed in external 2pass mode
+ *				motion search precision = 0 now effective in 2-pass
+ *				modulated quantization
+ *				added DX50 fourcc
+ *	01.12.2001	inital version; (c)2001 peter ross <pross@xvid.org>
+ *
+ *************************************************************************/
+
+#include <windows.h>
+#include <vfw.h>
+#include "vfwext.h"
+
+#include <xvid.h>
+#include "debug.h"
+#include "codec.h"
+
+
+static const int pmvfast_presets[7] = {
+	0, 0, 0, 0,
+	0 | XVID_ME_HALFPELREFINE16 | 0,
+	0 | XVID_ME_HALFPELREFINE16 | 0 |
+	XVID_ME_ADVANCEDDIAMOND16, XVID_ME_HALFPELREFINE16 | XVID_ME_EXTSEARCH16 |
+	XVID_ME_HALFPELREFINE8 | 0 | XVID_ME_USESQUARES16
+};
+
+
+
+/*	return xvid compatbile colorspace,
+	or XVID_CSP_NULL if failure
+*/
+
+int get_colorspace(BITMAPINFOHEADER * hdr)
+{
+	/* rgb only: negative height specifies top down image */
+	int rgb_flip = (hdr->biHeight < 0 ? 0 : XVID_CSP_VFLIP);
+
+	switch(hdr->biCompression)
+	{
+	case BI_RGB :
+		if (hdr->biBitCount == 16)
+		{
+			DPRINTF("RGB16 (RGB555)");
+			return rgb_flip | XVID_CSP_RGB555;
+		}
+		if (hdr->biBitCount == 24) 
+		{
+			DPRINTF("RGB24");
+			return rgb_flip | XVID_CSP_BGR;
+		}
+		if (hdr->biBitCount == 32) 
+		{
+			DPRINTF("RGB32");
+			return rgb_flip | XVID_CSP_BGRA;
+		}
+
+		DPRINTF("unsupported BI_RGB biBitCount=%i", hdr->biBitCount);
+		return XVID_CSP_NULL;
+
+	case BI_BITFIELDS :
+		if (hdr->biSize >= sizeof(BITMAPV4HEADER))
+		{
+			BITMAPV4HEADER * hdr4 = (BITMAPV4HEADER *)hdr;
+
+			if (hdr4->bV4BitCount == 16 &&
+				hdr4->bV4RedMask == 0x7c00 &&
+				hdr4->bV4GreenMask == 0x3e0 &&
+				hdr4->bV4BlueMask == 0x1f)
+			{
+				DPRINTF("RGB555");
+				return rgb_flip | XVID_CSP_RGB555;
+			}
+
+			if(hdr4->bV4BitCount == 16 &&
+				hdr4->bV4RedMask == 0xf800 &&
+				hdr4->bV4GreenMask == 0x7e0 &&
+				hdr4->bV4BlueMask == 0x1f)
+			{
+				DPRINTF("RGB565");
+				return rgb_flip | XVID_CSP_RGB565;
+			}
+
+			DPRINTF("unsupported BI_BITFIELDS mode");
+			return XVID_CSP_NULL;
+		}
+		
+		DPRINTF("unsupported BI_BITFIELDS/BITMAPHEADER combination");
+		return XVID_CSP_NULL;
+
+	case FOURCC_I420 :
+	case FOURCC_IYUV :
+		DPRINTF("IYUY");
+		return XVID_CSP_I420;
+
+	case FOURCC_YV12 :
+		DPRINTF("YV12");
+		return XVID_CSP_YV12;
+			
+	case FOURCC_YUYV :
+	case FOURCC_YUY2 :
+		DPRINTF("YUY2");
+		return XVID_CSP_YUY2;
+
+	case FOURCC_YVYU :
+		DPRINTF("YVYU");
+		return XVID_CSP_YVYU;
+
+	case FOURCC_UYVY :
+		DPRINTF("UYVY");
+		return XVID_CSP_UYVY;
+
+	default :
+		DPRINTF("unsupported colorspace %c%c%c%c", 
+            hdr->biCompression&0xff,
+            (hdr->biCompression>>8)&0xff,
+            (hdr->biCompression>>16)&0xff,
+            (hdr->biCompression>>24)&0xff);
+		return XVID_CSP_NULL;
+	}
+}
+
+
+/* compressor */
+
+
+/* test the output format */
+
+LRESULT compress_query(CODEC * codec, BITMAPINFO * lpbiInput, BITMAPINFO * lpbiOutput)
+{
+	BITMAPINFOHEADER * inhdr = &lpbiInput->bmiHeader;
+	BITMAPINFOHEADER * outhdr = &lpbiOutput->bmiHeader;
+
+    /* VFWEXT detection */
+    if (inhdr->biCompression == VFWEXT_FOURCC) {
+        return (ICM_USER+0x0fff);
+    }
+
+	if (get_colorspace(inhdr) == XVID_CSP_NULL) 
+	{
+		return ICERR_BADFORMAT;
+	}
+
+	if (lpbiOutput == NULL) 
+	{
+		return ICERR_OK;
+	}
+
+	if (inhdr->biWidth != outhdr->biWidth || inhdr->biHeight != outhdr->biHeight ||
+		(outhdr->biCompression != FOURCC_XVID && outhdr->biCompression != FOURCC_DIVX && outhdr->biCompression != FOURCC_DX50))
+	{
+		return ICERR_BADFORMAT;
+	}
+
+	return ICERR_OK;
+}
+
+
+LRESULT compress_get_format(CODEC * codec, BITMAPINFO * lpbiInput, BITMAPINFO * lpbiOutput)
+{
+	BITMAPINFOHEADER * inhdr = &lpbiInput->bmiHeader;
+	BITMAPINFOHEADER * outhdr = &lpbiOutput->bmiHeader;
+
+	if (get_colorspace(inhdr) == XVID_CSP_NULL)
+	{
+		return ICERR_BADFORMAT;
+	}
+
+	if (lpbiOutput == NULL) 
+	{
+		return sizeof(BITMAPV4HEADER);
+	}
+
+	memcpy(outhdr, inhdr, sizeof(BITMAPINFOHEADER));
+	outhdr->biSize = sizeof(BITMAPINFOHEADER);
+	outhdr->biSizeImage = compress_get_size(codec, lpbiInput, lpbiOutput);
+	outhdr->biXPelsPerMeter = 0;
+	outhdr->biYPelsPerMeter = 0;
+	outhdr->biClrUsed = 0;
+	outhdr->biClrImportant = 0;
+
+	if (codec->config.fourcc_used == 0)
+	{
+		outhdr->biCompression = FOURCC_XVID;
+	}
+	else if (codec->config.fourcc_used == 1)
+	{
+		outhdr->biCompression = FOURCC_DIVX;
+	}
+	else
+	{
+		outhdr->biCompression = FOURCC_DX50;
+	}
+
+	return ICERR_OK;
+}
+
+
+LRESULT compress_get_size(CODEC * codec, BITMAPINFO * lpbiInput, BITMAPINFO * lpbiOutput)
+{
+	return 2 * lpbiOutput->bmiHeader.biWidth * lpbiOutput->bmiHeader.biHeight * 3;
+}
+
+
+LRESULT compress_frames_info(CODEC * codec, ICCOMPRESSFRAMES * icf)
+{
+    //DPRINTF("%i %i", icf->lStartFrame, icf->lFrameCount);
+	codec->fincr = icf->dwScale;
+	codec->fbase = icf->dwRate;
+	return ICERR_OK;
+}
+
+
+const char type2char(int type)
+{
+    if (type==XVID_TYPE_IVOP)
+        return 'I';
+    if (type==XVID_TYPE_PVOP)
+        return 'P';
+    if (type==XVID_TYPE_BVOP)
+        return 'B';
+    return 'S';
+}
+
+int vfw_debug(void *handle,
+			 int opt,
+			 void *param1,
+			 void *param2)
+{
+	switch (opt) {
+	case XVID_PLG_INFO:
+	case XVID_PLG_CREATE:
+	case XVID_PLG_DESTROY:
+	case XVID_PLG_BEFORE:
+		return 0;
+
+	case XVID_PLG_AFTER:
+		{
+			xvid_plg_data_t *data = (xvid_plg_data_t *) param1;
+
+			DPRINTF("[%5i]   type=%c   Q:%2i   length:%6i",
+				   data->frame_num, 
+                   type2char(data->type),
+                   data->quant, 
+                   data->length);
+			return 0;
+		}
+	}
+
+	return XVID_ERR_FAIL;
+}
+
+
+
+LRESULT compress_begin(CODEC * codec, BITMAPINFO * lpbiInput, BITMAPINFO * lpbiOutput)
+{
+	xvid_gbl_init_t init;
+	xvid_enc_create_t create;
+    xvid_enc_plugin_t plugins[3];
+	xvid_plugin_single_t single;
+	xvid_plugin_2pass1_t pass1;
+	xvid_plugin_2pass2_t pass2;
+    int i;
+
+    /* destroy previously created codec */
+	if(codec->ehandle) {
+		xvid_encore(codec->ehandle, XVID_ENC_DESTROY, NULL, NULL);
+		codec->ehandle = NULL;
+	}
+
+    memset(&init, 0, sizeof(init));
+	init.version = XVID_VERSION;
+	init.cpu_flags = codec->config.cpu;
+    init.debug = codec->config.debug;
+	xvid_global(0, XVID_GBL_INIT, &init, NULL);
+
+	memset(&create, 0, sizeof(create));
+	create.version = XVID_VERSION;
+
+    // zones
+    create.zones = malloc(sizeof(xvid_enc_zone_t) * codec->config.num_zones);
+    create.num_zones = codec->config.num_zones;
+    for (i=0; i < create.num_zones; i++) {
+        create.zones[i].frame = codec->config.zones[i].frame;
+        if (codec->config.zones[i].mode == RC_ZONE_QUANT) {
+            create.zones[i].mode = XVID_ZONE_QUANT;
+            create.zones[i].increment = codec->config.zones[i].quant;
+        }else{
+            create.zones[i].mode = XVID_ZONE_WEIGHT;
+            create.zones[i].increment = codec->config.zones[i].weight;
+        }
+        create.zones[i].base = 100;
+    }
+
+    // plugins
+	create.plugins = plugins;
+	switch (codec->config.mode) 
+	{
+	case RC_MODE_1PASS :
+    	memset(&single, 0, sizeof(single));
+	    single.version = XVID_VERSION;
+        single.bitrate = codec->config.bitrate * CONFIG_KBPS;
+        single.reaction_delay_factor = codec->config.rc_reaction_delay_factor;
+		single.averaging_period = codec->config.rc_averaging_period;
+		single.buffer = codec->config.rc_buffer;
+        plugins[create.num_plugins].func = xvid_plugin_single;
+        plugins[create.num_plugins].param = &single;
+        create.num_plugins++;
+        break;
+
+	case RC_MODE_2PASS1 :
+    	memset(&pass1, 0, sizeof(pass1));
+	    pass1.version = XVID_VERSION;
+        pass1.filename = codec->config.stats;
+
+        plugins[create.num_plugins].func = xvid_plugin_2pass1;
+        plugins[create.num_plugins].param = &pass1;
+        create.num_plugins++;
+		break;
+
+	case RC_MODE_2PASS2 :
+    	memset(&pass2, 0, sizeof(pass2));
+	    pass2.version = XVID_VERSION;
+        pass2.bitrate = codec->config.bitrate * CONFIG_KBPS;
+		pass2.filename = codec->config.stats;
+
+        pass2.keyframe_boost = codec->config.keyframe_boost;   /* keyframe boost percentage: [0..100...]; */
+        pass2.payback_method = codec->config.bitrate_payback_method;
+        pass2.bitrate_payback_delay = codec->config.bitrate_payback_delay;
+        pass2.curve_compression_high = codec->config.curve_compression_high;
+        pass2.curve_compression_low = codec->config.curve_compression_low;
+        pass2.max_overflow_improvement = codec->config.twopass_max_overflow_improvement;
+        pass2.max_overflow_degradation = codec->config.twopass_max_overflow_degradation;
+        pass2.kftreshold = codec->config.kftreshold;
+	    pass2.kfreduction = codec->config.kfreduction;
+        pass2.min_key_interval = codec->config.min_key_interval;
+        pass2.container_frame_overhead = 24;    /* AVI */
+
+        plugins[create.num_plugins].func = xvid_plugin_2pass2;
+        plugins[create.num_plugins].param = &pass2;
+        create.num_plugins++;
+		break;
+
+	case RC_MODE_NULL :
+		return ICERR_OK;
+
+	default :
+		break;
+	}
+
+  	if ((profiles[codec->config.profile].flags & PROFILE_ADAPTQUANT) && codec->config.lum_masking) {
+        plugins[create.num_plugins].func = xvid_plugin_lumimasking;
+        plugins[create.num_plugins].param = NULL;
+        create.num_plugins++; 
+	}
+
+    plugins[create.num_plugins].func = vfw_debug;
+    plugins[create.num_plugins].param = NULL;
+    create.num_plugins++; 
+
+    create.profile = profiles[codec->config.profile].id;
+
+	create.width = lpbiInput->bmiHeader.biWidth;
+	create.height = lpbiInput->bmiHeader.biHeight;
+	create.fincr = codec->fincr;
+	create.fbase = codec->fbase;
+
+    create.max_key_interval = codec->config.max_key_interval;
+
+    create.min_quant[0] = codec->config.min_iquant;
+    create.max_quant[0] = codec->config.max_iquant;
+    create.min_quant[1] = codec->config.min_pquant;
+    create.max_quant[1] = codec->config.max_pquant;
+    create.min_quant[2] = codec->config.min_bquant;
+    create.max_quant[2] = codec->config.max_bquant;
+
+    if ((profiles[codec->config.profile].flags & PROFILE_BVOP) && codec->config.use_bvop) {
+        create.max_bframes = codec->config.max_bframes;
+	    create.bquant_ratio = codec->config.bquant_ratio;
+	    create.bquant_offset = codec->config.bquant_offset;
+
+        if (codec->config.packed) 
+            create.global |= XVID_GLOBAL_PACKED;
+
+	    if (codec->config.closed_gov) 
+		    create.global |= XVID_GLOBAL_CLOSED_GOP;
+
+    }
+
+	create.frame_drop_ratio = codec->config.frame_drop_ratio;
+
+    create.num_threads = codec->config.num_threads;
+
+	switch(xvid_encore(0, XVID_ENC_CREATE, &create, NULL))
+	{
+	case XVID_ERR_FAIL :	
+		return ICERR_ERROR;
+
+	case XVID_ERR_MEMORY :
+		return ICERR_MEMORY;
+
+	case XVID_ERR_FORMAT :
+		return ICERR_BADFORMAT;
+
+	case XVID_ERR_VERSION :
+		return ICERR_UNSUPPORTED;
+	}
+
+	codec->ehandle = create.handle;
+	codec->framenum = 0;
+	codec->keyspacing = 0;
+
+	return ICERR_OK;
+}
+
+
+LRESULT compress_end(CODEC * codec)
+{
+	if (codec->ehandle != NULL)
+	{
+		xvid_encore(codec->ehandle, XVID_ENC_DESTROY, NULL, NULL);
+		codec->ehandle = NULL;
+	}
+
+	return ICERR_OK;
+}
+
+
+static void apply_zone_modifiers(xvid_enc_frame_t * frame, CONFIG * config, int framenum)
+{
+    int i;
+
+    for (i=0; i<config->num_zones && config->zones[i].frame <= framenum; i++) ;
+    i--;
+
+    if (config->zones[i].greyscale) {
+        frame->vop_flags |= XVID_VOP_GREYSCALE;
+    }
+
+    if (config->zones[i].chroma_opt) {
+        frame->vop_flags |= XVID_VOP_CHROMAOPT;
+    }
+
+    if ((profiles[config->profile].flags & PROFILE_BVOP) && config->use_bvop) {
+        frame->bframe_threshold = config->zones[i].bvop_threshold;
+    }
+}
+
+
+LRESULT compress(CODEC * codec, ICCOMPRESS * icc)
+{
+	BITMAPINFOHEADER * inhdr = icc->lpbiInput;
+	BITMAPINFOHEADER * outhdr = icc->lpbiOutput;
+	xvid_enc_frame_t frame;
+	xvid_enc_stats_t stats;
+	int length;
+	
+	memset(&frame, 0, sizeof(frame));
+	frame.version = XVID_VERSION;
+
+    frame.type = XVID_TYPE_AUTO;
+
+	/* vol stuff */
+
+    if ((profiles[codec->config.profile].flags & PROFILE_MPEGQUANT) && 
+        codec->config.quant_type != QUANT_MODE_H263)
+	{
+		frame.vol_flags |= XVID_VOL_MPEGQUANT;
+
+		if (codec->config.quant_type == QUANT_MODE_CUSTOM) {
+			frame.quant_intra_matrix = codec->config.qmatrix_intra;
+			frame.quant_inter_matrix = codec->config.qmatrix_inter;
+		}else{
+			frame.quant_intra_matrix = NULL;
+			frame.quant_inter_matrix = NULL;
+		}
+	}
+
+    if ((profiles[codec->config.profile].flags & PROFILE_REDUCED) && 
+	    codec->config.reduced_resolution) {
+		frame.vol_flags |= XVID_VOL_REDUCED_ENABLE;
+		frame.vop_flags |= XVID_VOP_REDUCED;	/* XXX: need auto decion mode */
+	}
+
+	if ((profiles[codec->config.profile].flags & PROFILE_QPEL) && codec->config.qpel) {
+		frame.vol_flags |= XVID_VOL_QUARTERPEL;
+		frame.motion |= XVID_ME_QUARTERPELREFINE16 | XVID_ME_QUARTERPELREFINE8;
+	}
+
+	if ((profiles[codec->config.profile].flags & PROFILE_GMC) && codec->config.gmc)
+		frame.vol_flags |= XVID_VOL_GMC;
+
+	if ((profiles[codec->config.profile].flags & PROFILE_INTERLACE) && codec->config.interlacing)
+		frame.vol_flags |= XVID_VOL_INTERLACING;
+
+    /* vop stuff */
+
+	frame.vop_flags |= XVID_VOP_HALFPEL;
+	frame.vop_flags |= XVID_VOP_HQACPRED;
+
+	if (codec->config.vop_debug) 
+		frame.vop_flags |= XVID_VOP_DEBUG;
+
+    if (codec->config.trellis_quant) {
+        frame.vop_flags |= XVID_VOP_TRELLISQUANT;
+    }
+
+    if (codec->config.motion_search > 4)
+		frame.vop_flags |= XVID_VOP_INTER4V;
+
+	if (codec->config.chromame)
+		frame.vop_flags |= XVID_ME_CHROMA16 + XVID_ME_CHROMA8;
+
+	frame.motion |= pmvfast_presets[codec->config.motion_search];
+
+	switch (codec->config.vhq_mode)
+	{
+	case VHQ_MODE_DECISION :
+		frame.vop_flags |= XVID_VOP_MODEDECISION_BITS;
+		break;
+
+	case VHQ_LIMITED_SEARCH :
+		frame.vop_flags |= XVID_VOP_MODEDECISION_BITS;
+		frame.motion |= XVID_ME_HALFPELREFINE16_BITS;
+		frame.motion |= XVID_ME_QUARTERPELREFINE16_BITS;
+		break;
+
+	case VHQ_MEDIUM_SEARCH :
+		frame.vop_flags |= XVID_VOP_MODEDECISION_BITS;
+		frame.motion |= XVID_ME_HALFPELREFINE16_BITS;
+		frame.motion |= XVID_ME_HALFPELREFINE8_BITS;
+		frame.motion |= XVID_ME_QUARTERPELREFINE16_BITS;
+		frame.motion |= XVID_ME_QUARTERPELREFINE8_BITS;
+		frame.motion |= XVID_ME_CHECKPREDICTION_BITS;
+		break;
+
+	case VHQ_WIDE_SEARCH :
+		frame.vop_flags |= XVID_VOP_MODEDECISION_BITS;
+		frame.motion |= XVID_ME_HALFPELREFINE16_BITS;
+		frame.motion |= XVID_ME_HALFPELREFINE8_BITS;
+		frame.motion |= XVID_ME_QUARTERPELREFINE16_BITS;
+		frame.motion |= XVID_ME_QUARTERPELREFINE8_BITS;
+		frame.motion |= XVID_ME_CHECKPREDICTION_BITS;
+		frame.motion |= XVID_ME_EXTSEARCH_BITS;
+		break;
+
+	default :
+		break;
+	}
+
+	frame.input.plane[0] = icc->lpInput;
+	frame.input.stride[0] = (((icc->lpbiInput->biWidth * icc->lpbiInput->biBitCount) + 31) & ~31) >> 3;
+
+	if ((frame.input.csp = get_colorspace(inhdr)) == XVID_CSP_NULL)
+		return ICERR_BADFORMAT;
+
+	if (frame.input.csp == XVID_CSP_I420 || frame.input.csp == XVID_CSP_YV12)
+		frame.input.stride[0] = (frame.input.stride[0]*2)/3;
+
+	frame.bitstream = icc->lpOutput;
+	frame.length = icc->lpbiOutput->biSizeImage;
+
+    frame.quant = 0;
+
+    if (codec->config.mode == RC_MODE_NULL) {
+		outhdr->biSizeImage = 0;
+		*icc->lpdwFlags = AVIIF_KEYFRAME;
+		return ICERR_OK;
+    }
+
+	// force keyframe spacing in 2-pass 1st pass
+	if (codec->config.motion_search == 0)
+	{
+		frame.type = XVID_TYPE_IVOP;
+	}
+	else if (codec->keyspacing < codec->config.min_key_interval && codec->framenum)
+	{
+		DPRINTF("current frame forced to p-frame");
+		frame.type = XVID_TYPE_PVOP;
+	}
+
+    /* frame-based stuff */
+    apply_zone_modifiers(&frame, &codec->config, codec->framenum);
+
+    /* call encore */
+
+	memset(&stats, 0, sizeof(stats));
+	stats.version = XVID_VERSION;
+
+    length = xvid_encore(codec->ehandle, XVID_ENC_ENCODE, &frame, &stats);
+	switch (length) 
+	{
+	case XVID_ERR_FAIL :	
+		return ICERR_ERROR;
+
+	case XVID_ERR_MEMORY :
+		return ICERR_MEMORY;
+
+	case XVID_ERR_FORMAT :
+		return ICERR_BADFORMAT;	
+
+	case XVID_ERR_VERSION :
+		return ICERR_UNSUPPORTED;
+	}
+
+	DPRINTF("{type=%i len=%i} length=%i", stats.type, stats.length, length);
+
+    if (length == 0)	/* no encoder output */
+	{
+		*icc->lpdwFlags = 0;
+		((char*)icc->lpOutput)[0] = 0x7f;	/* virtual dub skip frame */
+		outhdr->biSizeImage = 1;
+		
+	}else{
+		if (frame.out_flags & XVID_KEYFRAME)
+	    {
+		    codec->keyspacing = 0;
+		    *icc->lpdwFlags = AVIIF_KEYFRAME;
+	    }
+	    else
+	    {
+		     *icc->lpdwFlags = 0;
+	    }
+
+    	outhdr->biSizeImage = length;
+
+    	if (codec->config.mode == RC_MODE_2PASS1 && codec->config.discard1pass)
+	    {
+		    outhdr->biSizeImage = 0;
+	    }
+    }
+
+	codec->framenum++;
+	codec->keyspacing++;
+
+	return ICERR_OK;
+}
+
+
+/* decompressor */
+
+
+LRESULT decompress_query(CODEC * codec, BITMAPINFO *lpbiInput, BITMAPINFO *lpbiOutput)
+{
+	BITMAPINFOHEADER * inhdr = &lpbiInput->bmiHeader;
+	BITMAPINFOHEADER * outhdr = &lpbiOutput->bmiHeader;
+
+	if (lpbiInput == NULL) 
+	{
+		return ICERR_ERROR;
+	}
+
+	if (inhdr->biCompression != FOURCC_XVID && inhdr->biCompression != FOURCC_DIVX && inhdr->biCompression != FOURCC_DX50 && get_colorspace(inhdr) == XVID_CSP_NULL)
+	{
+		return ICERR_BADFORMAT;
+	}
+
+	if (lpbiOutput == NULL) 
+	{
+		return ICERR_OK;
+	}
+
+	if (inhdr->biWidth != outhdr->biWidth ||
+		inhdr->biHeight != outhdr->biHeight ||
+		get_colorspace(outhdr) == XVID_CSP_NULL) 
+	{
+		return ICERR_BADFORMAT;
+	}
+
+	return ICERR_OK;
+}
+
+
+LRESULT decompress_get_format(CODEC * codec, BITMAPINFO * lpbiInput, BITMAPINFO * lpbiOutput)
+{
+	BITMAPINFOHEADER * inhdr = &lpbiInput->bmiHeader;
+	BITMAPINFOHEADER * outhdr = &lpbiOutput->bmiHeader;
+	LRESULT result;
+
+	if (lpbiOutput == NULL) 
+	{
+		return sizeof(BITMAPINFOHEADER);
+	}
+
+	/* --- yv12 --- */
+
+	if (get_colorspace(inhdr) != XVID_CSP_NULL) {
+		memcpy(outhdr, inhdr, sizeof(BITMAPINFOHEADER));
+		// XXX: should we set outhdr->biSize ??
+		return ICERR_OK;
+	}
+	/* --- yv12 --- */
+
+	result = decompress_query(codec, lpbiInput, lpbiOutput);
+	if (result != ICERR_OK) 
+	{
+		return result;
+	}
+
+	outhdr->biSize = sizeof(BITMAPINFOHEADER);
+	outhdr->biWidth = inhdr->biWidth;
+	outhdr->biHeight = inhdr->biHeight;
+	outhdr->biPlanes = 1;
+	outhdr->biBitCount = 24;
+	outhdr->biCompression = BI_RGB;	/* sonic foundry vegas video v3 only supports BI_RGB */
+	outhdr->biSizeImage = outhdr->biWidth * outhdr->biHeight * outhdr->biBitCount;
+	outhdr->biXPelsPerMeter = 0;
+	outhdr->biYPelsPerMeter = 0;
+	outhdr->biClrUsed = 0;
+	outhdr->biClrImportant = 0;
+
+	return ICERR_OK;
+}
+
+
+LRESULT decompress_begin(CODEC * codec, BITMAPINFO * lpbiInput, BITMAPINFO * lpbiOutput)
+{
+	xvid_gbl_init_t init;
+	xvid_dec_create_t create;
+
+	memset(&init, 0, sizeof(init));
+	init.version = XVID_VERSION;
+	init.cpu_flags = codec->config.cpu;
+	xvid_global(0, XVID_GBL_INIT, &init, NULL);
+
+	memset(&create, 0, sizeof(create));
+	create.version = XVID_VERSION;
+	create.width = lpbiInput->bmiHeader.biWidth;
+	create.height = lpbiInput->bmiHeader.biHeight;
+
+	switch(xvid_decore(0, XVID_DEC_CREATE, &create, NULL)) 
+	{
+	case XVID_ERR_FAIL :	
+		return ICERR_ERROR;
+
+	case XVID_ERR_MEMORY :
+		return ICERR_MEMORY;
+
+	case XVID_ERR_FORMAT :
+		return ICERR_BADFORMAT;
+
+	case XVID_ERR_VERSION :
+		return ICERR_UNSUPPORTED;
+	}
+
+	codec->dhandle = create.handle;
+
+	return ICERR_OK;
+}
+
+
+LRESULT decompress_end(CODEC * codec)
+{
+	if (codec->dhandle != NULL)
+	{
+		xvid_decore(codec->dhandle, XVID_DEC_DESTROY, NULL, NULL);
+		codec->dhandle = NULL;
+	}
+	return ICERR_OK;
+}
+
+
+LRESULT decompress(CODEC * codec, ICDECOMPRESS * icd)
+{
+	xvid_dec_frame_t frame;
+	
+	/* --- yv12 --- */	
+	if (icd->lpbiInput->biCompression != FOURCC_XVID &&
+		 icd->lpbiInput->biCompression != FOURCC_DIVX &&
+		 icd->lpbiInput->biCompression != FOURCC_DX50)
+	{
+		xvid_gbl_convert_t convert;
+
+		DPRINTF("input=%c%c%c%c output=%c%c%c%c", 
+            icd->lpbiInput->biCompression&0xff,
+            (icd->lpbiInput->biCompression>>8)&0xff,
+            (icd->lpbiInput->biCompression>>16)&0xff,
+            (icd->lpbiInput->biCompression>>24)&0xff,
+            icd->lpbiOutput->biCompression&0xff,
+            (icd->lpbiOutput->biCompression>>8)&0xff,
+            (icd->lpbiOutput->biCompression>>16)&0xff,
+            (icd->lpbiOutput->biCompression>>24)&0xff);
+
+		memset(&convert, 0, sizeof(convert));
+		convert.version = XVID_VERSION;
+
+		convert.input.csp = get_colorspace(icd->lpbiInput);
+		convert.input.plane[0] = icd->lpInput;
+		convert.input.stride[0] = (((icd->lpbiInput->biWidth *icd->lpbiInput->biBitCount) + 31) & ~31) >> 3;  
+		if (convert.input.csp == XVID_CSP_I420 || convert.input.csp == XVID_CSP_YV12)
+			convert.input.stride[0] = (convert.input.stride[0]*2)/3;
+
+		convert.output.csp = get_colorspace(icd->lpbiOutput);
+		convert.output.plane[0] = icd->lpOutput;
+		convert.output.stride[0] = (((icd->lpbiOutput->biWidth *icd->lpbiOutput->biBitCount) + 31) & ~31) >> 3;
+		if (convert.output.csp == XVID_CSP_I420 || convert.output.csp == XVID_CSP_YV12)
+			convert.output.stride[0] = (convert.output.stride[0]*2)/3;
+
+		convert.width = icd->lpbiInput->biWidth;
+		convert.height = icd->lpbiInput->biHeight;
+		convert.interlacing = 0;
+		if (convert.input.csp == XVID_CSP_NULL ||
+			convert.output.csp == XVID_CSP_NULL ||
+			xvid_global(0, XVID_GBL_CONVERT, &convert, NULL) < 0)
+		{
+			 return ICERR_BADFORMAT;
+		}
+		return ICERR_OK;
+	}
+	/* --- yv12 --- */
+	
+    memset(&frame, 0, sizeof(frame));
+    frame.version = XVID_VERSION;
+    frame.general = XVID_LOWDELAY;	/* force low_delay_default mode */
+	frame.bitstream = icd->lpInput;
+	frame.length = icd->lpbiInput->biSizeImage;
+	
+	if (~((icd->dwFlags & ICDECOMPRESS_HURRYUP) | (icd->dwFlags & ICDECOMPRESS_UPDATE) | (icd->dwFlags & ICDECOMPRESS_PREROLL)))
+	{
+		if ((frame.output.csp = get_colorspace(icd->lpbiOutput)) == XVID_CSP_NULL) 
+		{
+			return ICERR_BADFORMAT;
+		}
+		frame.output.plane[0] = icd->lpOutput;
+		frame.output.stride[0] = (((icd->lpbiOutput->biWidth * icd->lpbiOutput->biBitCount) + 31) & ~31) >> 3;
+		if (frame.output.csp == XVID_CSP_I420 || frame.output.csp == XVID_CSP_YV12)
+			frame.output.stride[0] = (frame.output.stride[0]*2)/3;
+	}
+	else
+	{
+		frame.output.csp = XVID_CSP_NULL;
+	}
+
+	switch (xvid_decore(codec->dhandle, XVID_DEC_DECODE, &frame, NULL)) 
+	{
+	case XVID_ERR_FAIL :	
+		return ICERR_ERROR;
+
+	case XVID_ERR_MEMORY :
+		return ICERR_MEMORY;
+
+	case XVID_ERR_FORMAT :
+		return ICERR_BADFORMAT;	
+
+	case XVID_ERR_VERSION :
+		return ICERR_UNSUPPORTED;
+	}
+
+	return ICERR_OK;
+}
+