#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <math.h>
#include <time.h>

#if !defined(INFINITY) && defined(HUGE_VAL)
#define INFINITY HUGE_VAL
#endif

#include "config.h"
#include "mp_msg.h"

#include "codec-cfg.h"
#include "stream.h"
#include "demuxer.h"
#include "stheader.h"

#include "muxer.h"

#include "img_format.h"
#include "mp_image.h"
#include "vf.h"

#include <xvid.h>
#include "xvid_vbr.h"

#include "m_option.h"


#ifdef XVID_API_UNSTABLE
#warning *******************************************************************
#warning **                                                               **
#warning **  Y O U '' R E   U S I N G   U N S T A B L E   S O F T W A R E  **
#warning **                                                               **
#warning ** Streams produced by this version aren''t probably compatible   **
#warning ** with anything else, even the xvid decoder itself. There are   **
#warning ** bugs, this code could crash, could blow up your PC or the     **
#warning ** whole building !                                              **
#warning ** If you want stable code and compatible streams, use stable    **
#warning ** XViD releases (currently 0.9.x).                              **
#warning **                                                               **
#warning *******************************************************************
#endif

/**********************************************************************/
/* motion estimation quality presets */
static int const motion_presets[7] = {
#ifdef XVID_API_UNSTABLE
	0,
	0,
	0,
	0,
	PMV_HALFPELREFINE16 | PMV_HALFPELDIAMOND8,
	PMV_HALFPELREFINE16 | PMV_HALFPELDIAMOND8 | PMV_ADVANCEDDIAMOND16,
	PMV_HALFPELREFINE16 | PMV_EXTSEARCH16 |	PMV_HALFPELREFINE8 | PMV_HALFPELDIAMOND8 | PMV_USESQUARES16
#else
        0,
	PMV_QUICKSTOP16,
	PMV_EARLYSTOP16,
	PMV_EARLYSTOP16 | PMV_EARLYSTOP8,
        PMV_EARLYSTOP16 | PMV_HALFPELREFINE16 | PMV_EARLYSTOP8 | PMV_HALFPELDIAMOND8,
        PMV_EARLYSTOP16 | PMV_HALFPELREFINE16 | PMV_EARLYSTOP8 | PMV_HALFPELDIAMOND8 | PMV_ADVANCEDDIAMOND16,
	PMV_EARLYSTOP16 | PMV_HALFPELREFINE16 | PMV_EXTSEARCH16 | PMV_EARLYSTOP8 | PMV_HALFPELREFINE8 | 
	PMV_HALFPELDIAMOND8 | PMV_USESQUARES16

#endif
};

extern char* passtmpfile;

static int xvidenc_pass = 0;
static int xvidenc_quality = 6;
static int xvidenc_4mv = 0;
static int xvidenc_bitrate = -1;
static int xvidenc_rc_reaction_delay_factor = -1;
static int xvidenc_rc_averaging_period = -1;
static int xvidenc_rc_buffer = -1;
static char* xvidenc_quant_range = "2-31/2-31";
static int xvidenc_min_key_interval = -1;
static int xvidenc_max_key_interval = -1;
static int xvidenc_mpeg_quant = 0;
static int xvidenc_mod_quant = 0;
static int xvidenc_keyframe_boost = -1;
static int xvidenc_kfthreshold = -1;
static int xvidenc_kfreduction = -1;
static int xvidenc_fixed_quant = 0;
static int xvidenc_debug = 0;
static int xvidenc_interlacing = 0;
static int xvidenc_greyscale = 0;
#ifdef XVID_API_UNSTABLE
static int xvidenc_packed = 0;
static int xvidenc_divx5bvop = 1;
static int xvidenc_lumi_mask = 0;
static int xvidenc_qpel = 0;
static int xvidenc_max_bframes = 0;
static int xvidenc_bquant_ratio = 150;
static int xvidenc_bquant_offset = 100;
static int xvidenc_bf_threshold = 0;
static int xvidenc_gmc = 0;
static int xvidenc_chroma_me = 0;
static int xvidenc_chroma_opt = 0;
static int xvidenc_reduced = 0;
static int xvidenc_hqac = 0;
static int xvidenc_vhq = 0;
static int xvidenc_psnr = 0;
static uint64_t xvid_error[3];
#endif

m_option_t xvidencopts_conf[] = {
    { "pass", &xvidenc_pass, CONF_TYPE_INT, CONF_RANGE, 0, 2, NULL},
    { "me_quality", &xvidenc_quality, CONF_TYPE_INT, CONF_RANGE, 0,
      sizeof(motion_presets) / sizeof(motion_presets[0]) - 1, NULL},
    { "4mv", &xvidenc_4mv, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "bitrate", &xvidenc_bitrate, CONF_TYPE_INT, CONF_RANGE, 4, 24000000, NULL},
    { "rc_reaction_delay_factor", &xvidenc_rc_reaction_delay_factor, CONF_TYPE_INT, 0, 0, 0, NULL},
    { "rc_averaging_period", &xvidenc_rc_averaging_period, CONF_TYPE_INT, 0, 0, 0, NULL},
    { "rc_buffer", &xvidenc_rc_buffer, CONF_TYPE_INT, 0, 0, 0, NULL},
    { "quant_range", &xvidenc_quant_range, CONF_TYPE_STRING, 0, 0, 0, NULL},
    { "min_key_interval", &xvidenc_min_key_interval, CONF_TYPE_INT, 0, 0, 0, NULL}, /* for XVID_MODE_2PASS_2 */
    { "max_key_interval", &xvidenc_max_key_interval, CONF_TYPE_INT, 0, 0, 0, NULL},
    { "mpeg_quant", &xvidenc_mpeg_quant, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "mod_quant", &xvidenc_mod_quant, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "keyframe_boost", &xvidenc_keyframe_boost, CONF_TYPE_INT, CONF_RANGE, 0, 1000, NULL}, /* for XVID_MODE_2PASS_2 */
    { "kfthreshold", &xvidenc_kfthreshold, CONF_TYPE_INT, 0, 0, 0, NULL}, /* for XVID_MODE_2PASS_2 */
    { "kfreduction", &xvidenc_kfreduction, CONF_TYPE_INT, CONF_RANGE, 0, 100, NULL}, /* for XVID_MODE_2PASS_2 */
    { "fixed_quant", &xvidenc_fixed_quant, CONF_TYPE_INT, CONF_RANGE, 1, 31, NULL}, /* for XVID_MODE_FIXED_QUANT */
    { "debug", &xvidenc_debug, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "interlacing", &xvidenc_interlacing, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "greyscale", &xvidenc_greyscale, CONF_TYPE_FLAG, 0, 0, 1, NULL},
#ifdef XVID_API_UNSTABLE
    { "packed", &xvidenc_packed, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "divx5bvop", &xvidenc_divx5bvop, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    //{ "lumi_mask", &xvidenc_lumi_mask, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "psnr", &xvidenc_psnr, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "qpel", &xvidenc_qpel, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "max_bframes", &xvidenc_max_bframes, CONF_TYPE_INT, CONF_RANGE, 0, 4, NULL},
    { "bquant_ratio", &xvidenc_bquant_ratio, CONF_TYPE_INT, CONF_RANGE, 0, 1000, NULL},
    { "bquant_offset", &xvidenc_bquant_offset, CONF_TYPE_INT, CONF_RANGE, -1000, 1000, NULL},
    { "bf_threshold", &xvidenc_bf_threshold, CONF_TYPE_INT, CONF_RANGE, -255, 255, NULL},
    { "reduced", &xvidenc_reduced, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "gmc", &xvidenc_gmc, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "chroma_me", &xvidenc_chroma_me, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "hq_ac", &xvidenc_hqac, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "vhq", &xvidenc_vhq, CONF_TYPE_INT, CONF_RANGE, 0, 4, NULL},
    { "chroma_opt", &xvidenc_chroma_opt, CONF_TYPE_FLAG, 0, 0, 1, NULL},
#endif
    { NULL, NULL, 0, 0, 0, 0, NULL}
};

struct vf_priv_s {
    muxer_stream_t* mux;
    XVID_ENC_FRAME enc_frame;
    void* enc_handle;
    vbr_control_t vbr_state;
    int pixels;
    int nb_frames;
};

static int
config(struct vf_instance_s* vf,
       int width, int height, int d_width, int d_height,
       unsigned int flags, unsigned int outfmt)
{
    XVID_ENC_PARAM enc_param;
    struct vf_priv_s *fp = vf->priv;
    unsigned int min_iq, max_iq, min_pq, max_pq;

    fp->mux->bih->biWidth = width;
    fp->mux->bih->biHeight = height;
    fp->mux->bih->biSizeImage = fp->mux->bih->biWidth * fp->mux->bih->biHeight * 3;
    fp->mux->aspect = (float)d_width/d_height;
    mp_msg(MSGT_MENCODER,MSGL_INFO,"videocodec: XViD (%dx%d fourcc=%x [%.4s])\n",
	width, height, fp->mux->bih->biCompression, (char *)&fp->mux->bih->biCompression);

    // {min,max}_{i,p}quantizer parsing & validation
    if (sscanf (xvidenc_quant_range, "%u-%u/%u-%u", &min_iq, &max_iq, &min_pq, &max_pq) < 4) {
	mp_msg (MSGT_MENCODER, MSGL_ERR, 
		"xvid: ERROR: cannot parse \"quant_range=%s\"\n", xvidenc_quant_range);
	return 0;
    }
    if (min_iq < 1 || min_iq > 31 || max_iq < 1 || max_iq > 31 || min_iq > max_iq ||
	min_pq < 1 || min_pq > 31 || max_pq < 1 || max_pq > 31 || min_pq > max_pq) {
	mp_msg (MSGT_MENCODER, MSGL_ERR,
		"xvid: ERROR: {min,max} {I,P} quantizer must be in [1,31] and min must be <= max.\n");
	mp_msg (MSGT_MENCODER, MSGL_ERR,
		"xvid: ERROR: cannot use \"quant_range=%s\"\n", xvidenc_quant_range);
	return -1;
    }

#ifdef XVID_API_UNSTABLE
    mp_msg (MSGT_MENCODER, MSGL_WARN,
	    "\n"
	    "*******************************************************************\n"
	    "**                                                               **\n"
	    "**  Y O U ' R E   U S I N G   U N S T A B L E   S O F T W A R E  **\n"
	    "**                                                               **\n"
	    "** Streams produced by this version aren't probably compatible   **\n"
	    "** with anything else, even the xvid decoder itself. There are   **\n"
	    "** bugs, this code could crash, could blow up your PC or the     **\n"
	    "** whole building !                                              **\n"
	    "** If you want stable code and compatible streams, use stable    **\n"
	    "** XViD releases (currently 0.9.x).                              **\n"
	    "**                                                               **\n"
	    "*******************************************************************\n"
	    "\n");
#endif

    // initialize XViD core parameters
    // ===============================
    memset(&enc_param, 0, sizeof(enc_param));
    enc_param.width = width;
    enc_param.height = height;
    enc_param.fincr = fp->mux->h.dwScale;
    enc_param.fbase = fp->mux->h.dwRate;
    if (xvidenc_bitrate > 16000)
	enc_param.rc_bitrate = xvidenc_bitrate;
    else if (xvidenc_bitrate > 0)
	enc_param.rc_bitrate = xvidenc_bitrate * 1000;
    else
	enc_param.rc_bitrate = -1;
#ifdef XVID_API_UNSTABLE
    if (xvidenc_max_bframes >= 1 && xvidenc_pass >= 1) {
	mp_msg(MSGT_MENCODER,MSGL_WARN, "xvid: cannot use bframes with 2-pass, disabling bframes\n");
	xvidenc_max_bframes = 0;
    }
    enc_param.max_bframes = xvidenc_max_bframes;
    enc_param.bquant_ratio = xvidenc_bquant_ratio;
    enc_param.bquant_offset = xvidenc_bquant_offset;
    if (xvidenc_divx5bvop) 
	enc_param.global |= XVID_GLOBAL_DX50BVOP;
    if (xvidenc_packed) 
	enc_param.global |= XVID_GLOBAL_PACKED;
    if (xvidenc_reduced)
	enc_param.global |= XVID_GLOBAL_REDUCED;
    if (xvidenc_psnr) {
	enc_param.global |= XVID_GLOBAL_EXTRASTATS;
	fp->pixels = width * height;
	fp->nb_frames = 0;
	xvid_error[0] = xvid_error[1] = xvid_error[2] = 0;
    }
    if (xvidenc_greyscale)
	enc_param.global |= XVID_GREYSCALE;
#endif
    enc_param.rc_reaction_delay_factor = xvidenc_rc_reaction_delay_factor;
    enc_param.rc_averaging_period = xvidenc_rc_averaging_period;
    enc_param.rc_buffer = xvidenc_rc_buffer;
    enc_param.min_quantizer = min_iq;
    enc_param.max_quantizer = max_iq;
    if( xvidenc_max_key_interval <= 0 )
	xvidenc_max_key_interval = 10 * enc_param.fbase / enc_param.fincr;
    enc_param.max_key_interval = xvidenc_max_key_interval;
    switch (xvid_encore(NULL, XVID_ENC_CREATE, &enc_param, NULL)) {
    case XVID_ERR_FAIL:
	mp_msg(MSGT_MENCODER,MSGL_ERR, "xvid: encoder creation failed\n");
	return 0;
    case XVID_ERR_MEMORY:
	mp_msg(MSGT_MENCODER,MSGL_ERR, "xvid: encoder creation failed, out of memory\n");
	return 0;
    case XVID_ERR_FORMAT:
	mp_msg(MSGT_MENCODER,MSGL_ERR, "xvid: encoder creation failed, bad format\n");
	return 0;
    }
    fp->enc_handle = enc_param.handle;

    // initialize XViD per-frame static parameters
    // ===========================================
    fp->enc_frame.motion = motion_presets[xvidenc_quality];
    fp->enc_frame.general = XVID_HALFPEL | (xvidenc_mpeg_quant ? XVID_MPEGQUANT : XVID_H263QUANT);
    if (xvidenc_4mv)
	fp->enc_frame.general |= XVID_INTER4V;
    if (xvidenc_interlacing)
	fp->enc_frame.general |= XVID_INTERLACING;
#ifdef XVID_API_UNSTABLE
    fp->enc_frame.bframe_threshold = xvidenc_bf_threshold;
    if (xvidenc_lumi_mask)
	fp->enc_frame.general |= XVID_LUMIMASKING;
    if (xvidenc_qpel) {
	fp->enc_frame.general |= XVID_QUARTERPEL;
	fp->enc_frame.motion |= PMV_QUARTERPELREFINE16 | PMV_QUARTERPELREFINE8;
    }
    switch (xvidenc_vhq) {
    case 4: // wide search
	fp->enc_frame.motion |= EXTSEARCH_BITS | PMV_EXTSEARCH8;
    case 3: // medium search
	fp->enc_frame.motion |= HALFPELREFINE8_BITS | QUARTERPELREFINE8_BITS | CHECKPREDICTION_BITS;
    case 2: // limited search
	fp->enc_frame.motion |= HALFPELREFINE16_BITS | QUARTERPELREFINE16_BITS;
    case 1: // mode decision
	fp->enc_frame.general |= XVID_MODEDECISION_BITS;
	break;
    case 0: // off
	break;
    }
    if (xvidenc_gmc)
	fp->enc_frame.general |= XVID_GMC;
    if (xvidenc_psnr)
	fp->enc_frame.general |= XVID_EXTRASTATS;
    if (xvidenc_chroma_me)
	fp->enc_frame.motion |= PMV_CHROMA16 | PMV_CHROMA8;
    if(xvidenc_reduced)
	fp->enc_frame.general |= XVID_REDUCED;
    if(xvidenc_hqac)
	fp->enc_frame.general |= XVID_HQACPRED;
    if (xvidenc_chroma_opt)
	fp->enc_frame.general |= XVID_CHROMAOPT;
#else
    if (xvidenc_greyscale)
	fp->enc_frame.general |= XVID_GREYSCALE;
#endif

    switch (outfmt) {
    case IMGFMT_YV12:
	fp->enc_frame.colorspace = XVID_CSP_YV12;
	break;
    case IMGFMT_IYUV: case IMGFMT_I420:
	fp->enc_frame.colorspace = XVID_CSP_I420;
	break;
    case IMGFMT_YUY2:
	fp->enc_frame.colorspace = XVID_CSP_YUY2;
	break;
    case IMGFMT_UYVY:
	fp->enc_frame.colorspace = XVID_CSP_UYVY;
	break;
    case IMGFMT_RGB24: case IMGFMT_BGR24:
    	fp->enc_frame.colorspace = XVID_CSP_RGB24;
	break;
    default:
	mp_msg(MSGT_MENCODER,MSGL_ERR,"xvid: unsupported picture format (%s)!\n",
	       vo_format_name(outfmt));
	return 0;
    }
    fp->enc_frame.quant_intra_matrix = 0;
    fp->enc_frame.quant_inter_matrix = 0;

    // initialize VBR engine
    // =====================
    vbrSetDefaults(&fp->vbr_state);
    if (xvidenc_min_key_interval < 0)
	xvidenc_min_key_interval = fp->vbr_state.min_key_interval;

    // pass
    if (xvidenc_pass == 0) {
	if (xvidenc_fixed_quant >= 1) {
	    fp->vbr_state.mode = VBR_MODE_FIXED_QUANT;
	    fp->vbr_state.fixed_quant = xvidenc_fixed_quant;
	} else
	    fp->vbr_state.mode = VBR_MODE_1PASS;
    }
    else if (xvidenc_pass == 1)
	fp->vbr_state.mode = VBR_MODE_2PASS_1;
    else if (xvidenc_pass == 2)
	fp->vbr_state.mode = VBR_MODE_2PASS_2;
    else
	return -1;

    // misc
    fp->vbr_state.fps = (double)enc_param.fbase / enc_param.fincr;
    fp->vbr_state.filename = passtmpfile;
    fp->vbr_state.desired_bitrate = enc_param.rc_bitrate;
    fp->vbr_state.min_iquant = min_iq;
    fp->vbr_state.max_iquant = max_iq;
    fp->vbr_state.min_pquant = min_pq;
    fp->vbr_state.max_pquant = max_pq;
    if (xvidenc_keyframe_boost >= 0)
	fp->vbr_state.keyframe_boost = xvidenc_keyframe_boost;
    if (xvidenc_kfthreshold >= 0)
	fp->vbr_state.kftreshold = xvidenc_kfthreshold;
    if (xvidenc_kfreduction >= 0)
	fp->vbr_state.kfreduction = xvidenc_kfreduction;
    if (xvidenc_min_key_interval >= 0)
	fp->vbr_state.min_key_interval = xvidenc_min_key_interval;
    fp->vbr_state.max_key_interval = enc_param.max_key_interval;
    fp->vbr_state.debug = xvidenc_debug;

    vbrInit(&fp->vbr_state);

#ifdef XVID_API_UNSTABLE
    fp->mux->decoder_delay = enc_param.max_bframes ? 1 : 0;
#endif

    return 1;
}

#ifdef XVID_API_UNSTABLE
static double
sse_to_PSNR(double sse, double pixels)
{
    return sse == 0 ? INFINITY : 4.34294481903251827652 * (11.08252709031685229249 - log(sse/pixels));
    // 4.34294481903251827652 = 10/log(10)
    // 11.08252709031685229249 = log(255*255)
}
#endif

static void
uninit(struct vf_instance_s* vf)
{
    struct vf_priv_s *fp = vf->priv;

#ifdef XVID_API_UNSTABLE
    if (xvidenc_psnr) {
	double p = (double)fp->pixels * (double)fp->nb_frames;
        printf ("PSNR: Y:%2.2f, Cb:%2.2f, Cr:%2.2f, All:%2.2f\n", 
		sse_to_PSNR(xvid_error[0], p), 
		sse_to_PSNR(xvid_error[1], p/4), 
		sse_to_PSNR(xvid_error[2], p/4), 
		sse_to_PSNR(xvid_error[0] + xvid_error[1] + xvid_error[2], p*1.5));
    }
#endif
    vbrFinish(&fp->vbr_state);
}

static int
control(struct vf_instance_s* vf, int request, void* data)
{
    return CONTROL_UNKNOWN;
}

static int
query_format(struct vf_instance_s* vf, unsigned int fmt)
{
    switch(fmt){
    case IMGFMT_YV12: case IMGFMT_IYUV: case IMGFMT_I420:
	return VFCAP_CSP_SUPPORTED | VFCAP_CSP_SUPPORTED_BY_HW;
    case IMGFMT_YUY2: case IMGFMT_UYVY:
	return VFCAP_CSP_SUPPORTED;
    case IMGFMT_RGB24: case IMGFMT_BGR24:
	return VFCAP_CSP_SUPPORTED | VFCAP_FLIPPED;
    }
    return 0;
}

static int
put_image(struct vf_instance_s* vf, mp_image_t *mpi, double pts)
{
    XVID_ENC_STATS enc_stats;
    struct vf_priv_s *fp = vf->priv;

    fp->enc_frame.bitstream = fp->mux->buffer;
    fp->enc_frame.length = -1 /* fp->mux->buffer_size */;
    fp->enc_frame.image = mpi->planes[0];
#ifdef XVID_API_UNSTABLE
    fp->enc_frame.stride = mpi->stride[0];
#endif

    // get quantizers & I/P decision from the VBR engine
#ifdef XVID_API_UNSTABLE
    if (xvidenc_max_bframes >= 1) {
	if (xvidenc_fixed_quant!=0) {
	    // hack, the internal VBR engine isn't fixed-quant aware
	    fp->enc_frame.quant = xvidenc_fixed_quant;
	    fp->enc_frame.intra = -1;
	    fp->enc_frame.bquant = (xvidenc_fixed_quant * xvidenc_bquant_ratio + xvidenc_bquant_offset) / 100;
	} else
	    // use the internal VBR engine since the external one isn't bframe aware
	    fp->enc_frame.quant =0;
	    fp->enc_frame.intra =-1;
	    fp->enc_frame.bquant = 0;
    } else {
	fp->enc_frame.quant = vbrGetQuant(&fp->vbr_state);
	fp->enc_frame.intra = vbrGetIntra(&fp->vbr_state);
    }
#else
    fp->enc_frame.quant = vbrGetQuant(&fp->vbr_state);
    fp->enc_frame.intra = vbrGetIntra(&fp->vbr_state);
#endif

    // modulated quantizer type
    if (xvidenc_mod_quant && xvidenc_pass == 2) {
	fp->enc_frame.general |= (fp->enc_frame.quant < 4) ? XVID_MPEGQUANT : XVID_H263QUANT;
	fp->enc_frame.general &= (fp->enc_frame.quant < 4) ? ~XVID_H263QUANT : ~XVID_MPEGQUANT;
    }

    // encode frame
    switch (xvid_encore(fp->enc_handle, XVID_ENC_ENCODE, &fp->enc_frame, &enc_stats)) {
    case XVID_ERR_OK:
	break;
    case XVID_ERR_MEMORY:
	mp_msg(MSGT_MENCODER, MSGL_ERR, "xvid: out of memory\n");
	break;
    case XVID_ERR_FORMAT:
	mp_msg(MSGT_MENCODER, MSGL_ERR, "xvid: bad format\n");
	break;
    default:
	mp_msg(MSGT_MENCODER, MSGL_ERR, "xvid: failure\n");
	break;
    }

#ifdef XVID_API_UNSTABLE
    if (xvidenc_psnr) {
        static FILE *fvstats = NULL;
        char filename[20];

        if (!fvstats) {
            time_t today2;
            struct tm *today;
            today2 = time (NULL);
            today = localtime (&today2);
            sprintf (filename, "psnr_%02d%02d%02d.log", today->tm_hour, today->tm_min, today->tm_sec);
            fvstats = fopen (filename,"w");
            if (!fvstats) {
                perror ("fopen");
                xvidenc_psnr = 0; // disable block
            }
        }

	xvid_error[0] += enc_stats.sse_y;
	xvid_error[1] += enc_stats.sse_u;
	xvid_error[2] += enc_stats.sse_v;

        fprintf (fvstats, "%6d, %2d, %6d, %2.2f, %2.2f, %2.2f, %2.2f %c\n",
		 fp->nb_frames,
		 enc_stats.quant,
		 fp->enc_frame.length,
		 sse_to_PSNR (enc_stats.sse_y, fp->pixels),
		 sse_to_PSNR (enc_stats.sse_u, fp->pixels / 4),
		 sse_to_PSNR (enc_stats.sse_v, fp->pixels / 4),
		 sse_to_PSNR (enc_stats.sse_y + enc_stats.sse_u + enc_stats.sse_v, (double)fp->pixels * 1.5),
		 fp->enc_frame.intra == 0 ? 'P' : fp->enc_frame.intra == 1 ? 'I' : 'B'
		 );

	fp->nb_frames++;
    }
#endif
    
    // write output
    if (fp->enc_frame.length > 0)
    muxer_write_chunk(fp->mux, fp->enc_frame.length, fp->enc_frame.intra==1 ? 0x10 : 0, MP_NOPTS_VALUE, MP_NOPTS_VALUE);
    else
		++fp->mux->encoder_delay;

    // update the VBR engine
    vbrUpdate(&fp->vbr_state, enc_stats.quant, fp->enc_frame.intra,
	      enc_stats.hlength, fp->enc_frame.length, enc_stats.kblks, enc_stats.mblks, enc_stats.ublks);

    return 1;
}

//===========================================================================//

static int
vf_open(vf_instance_t *vf, char* args)
{
    XVID_INIT_PARAM params = { 0, 0, 0};
    vf->config = config;
    vf->default_caps = VFCAP_CONSTANT;
    vf->control = control;
    vf->uninit = uninit;
    vf->query_format = query_format;
    vf->put_image = put_image;
    vf->priv = malloc(sizeof(struct vf_priv_s));
    memset(vf->priv, 0, sizeof(struct vf_priv_s));
    vf->priv->mux = (muxer_stream_t*)args;

    vf->priv->mux->bih = calloc(1, sizeof(BITMAPINFOHEADER));
    vf->priv->mux->bih->biSize = sizeof(BITMAPINFOHEADER);
    vf->priv->mux->bih->biWidth = 0;
    vf->priv->mux->bih->biHeight = 0;
    vf->priv->mux->bih->biPlanes = 1;
    vf->priv->mux->bih->biBitCount = 24;
    vf->priv->mux->bih->biCompression = mmioFOURCC('X','V','I','D');

    if (xvid_init(NULL, 0, &params, NULL) != XVID_ERR_OK) {
	mp_msg(MSGT_MENCODER,MSGL_ERR, "xvid: initialisation failure\n");
	abort();
    }
    if (params.api_version != API_VERSION) {
	mp_msg(MSGT_MENCODER,MSGL_ERR, "xvid: XviD library API version mismatch\n"
		"\texpected %d.%d, got %d.%d, you should recompile MPlayer.\n",
		API_VERSION >> 16, API_VERSION & 0xff,
		params.api_version >> 16, params.api_version & 0xff);
	abort();
    }

    return 1;
}

vf_info_t ve_info_xvid = {
    "XviD encoder",
    "xvid",
    "Kim Minh Kaplan & Rémi Guyomarch",
    "for internal use by mencoder",
    vf_open
};

//===========================================================================//
