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/*

 * Xvid rate control wrapper for lavc video encoders

 *

 * Copyright (c) 2006 Michael Niedermayer 

 *

 * This file is part of FFmpeg.

 *

 * FFmpeg is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * FFmpeg 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

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with FFmpeg; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#include "config.h"

#include 

#include 

#include "libavutil/attributes.h"

#include "libavutil/file.h"

#include "avcodec.h"

#include "libxvid.h"

#include "mpegvideo.h"

#undef NDEBUG

#include 

av_cold int ff_xvid_rate_control_init(MpegEncContext *s)

{

    char *tmp_name;

    int fd, i;

    xvid_plg_create_t xvid_plg_create = { 0 };

    xvid_plugin_2pass2_t xvid_2pass2  = { 0 };

    fd=av_tempfile("xvidrc.", &tmp_name, 0, s->avctx);

    if (fd == -1) {

        av_log(NULL, AV_LOG_ERROR, "Can't create temporary pass2 file.\n");

        return -1;

    }

    for(i=0; irc_context.num_entries; i++){

        static const char frame_types[] = " ipbs";

        char tmp[256];

        RateControlEntry *rce;

        rce= &s->rc_context.entry[i];

        snprintf(tmp, sizeof(tmp), "%c %d %d %d %d %d %d\n",

            frame_types[rce->pict_type], (int)lrintf(rce->qscale / FF_QP2LAMBDA), rce->i_count, s->mb_num - rce->i_count - rce->skip_count,

            rce->skip_count, (rce->i_tex_bits + rce->p_tex_bits + rce->misc_bits+7)/8, (rce->header_bits+rce->mv_bits+7)/8);

        if (write(fd, tmp, strlen(tmp)) < 0) {

            av_log(NULL, AV_LOG_ERROR, "Error %s writing 2pass logfile\n", strerror(errno));

            av_free(tmp_name);

            close(fd);

            return AVERROR(errno);

        }

    }

    close(fd);

    xvid_2pass2.version= XVID_MAKE_VERSION(1,1,0);

    xvid_2pass2.filename= tmp_name;

    xvid_2pass2.bitrate= s->avctx->bit_rate;

    xvid_2pass2.vbv_size= s->avctx->rc_buffer_size;

    xvid_2pass2.vbv_maxrate= s->avctx->rc_max_rate;

    xvid_2pass2.vbv_initial= s->avctx->rc_initial_buffer_occupancy;

    xvid_plg_create.version= XVID_MAKE_VERSION(1,1,0);

    xvid_plg_create.fbase= s->avctx->time_base.den;

    xvid_plg_create.fincr= s->avctx->time_base.num;

    xvid_plg_create.param= &xvid_2pass2;

    if(xvid_plugin_2pass2(NULL, XVID_PLG_CREATE, &xvid_plg_create, &s->rc_context.non_lavc_opaque)<0){

        av_log(NULL, AV_LOG_ERROR, "xvid_plugin_2pass2 failed\n");

        return -1;

    }

    return 0;

}

float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run){

    xvid_plg_data_t xvid_plg_data = { 0 };

    xvid_plg_data.version= XVID_MAKE_VERSION(1,1,0);

    xvid_plg_data.width = s->width;

    xvid_plg_data.height= s->height;

    xvid_plg_data.mb_width = s->mb_width;

    xvid_plg_data.mb_height= s->mb_height;

    xvid_plg_data.fbase= s->avctx->time_base.den;

    xvid_plg_data.fincr= s->avctx->time_base.num;

    xvid_plg_data.min_quant[0]= s->avctx->qmin;

    xvid_plg_data.min_quant[1]= s->avctx->qmin;

    xvid_plg_data.min_quant[2]= s->avctx->qmin; //FIXME i/b factor & offset

    xvid_plg_data.max_quant[0]= s->avctx->qmax;

    xvid_plg_data.max_quant[1]= s->avctx->qmax;

    xvid_plg_data.max_quant[2]= s->avctx->qmax; //FIXME i/b factor & offset

    xvid_plg_data.bquant_offset = 0; //  100 * s->avctx->b_quant_offset;

    xvid_plg_data.bquant_ratio = 100; // * s->avctx->b_quant_factor;

    if(!s->rc_context.dry_run_qscale){

        if(s->picture_number){

            xvid_plg_data.length=

            xvid_plg_data.stats.length= (s->frame_bits + 7)/8;

            xvid_plg_data.frame_num= s->rc_context.last_picture_number;

            xvid_plg_data.quant= s->qscale;

            xvid_plg_data.type= s->last_pict_type;

            if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_AFTER, &xvid_plg_data, NULL)){

                av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_AFTER, ...) FAILED\n");

                return -1;

            }

        }

        s->rc_context.last_picture_number=

        xvid_plg_data.frame_num= s->picture_number;

        xvid_plg_data.quant= 0;

        if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_BEFORE, &xvid_plg_data, NULL)){

            av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_BEFORE, ...) FAILED\n");

            return -1;

        }

        s->rc_context.dry_run_qscale= xvid_plg_data.quant;

    }

    xvid_plg_data.quant= s->rc_context.dry_run_qscale;

    if(!dry_run)

        s->rc_context.dry_run_qscale= 0;

    if(s->pict_type == AV_PICTURE_TYPE_B) //FIXME this is not exactly identical to xvid

        return xvid_plg_data.quant * FF_QP2LAMBDA * s->avctx->b_quant_factor + s->avctx->b_quant_offset;

    else

        return xvid_plg_data.quant * FF_QP2LAMBDA;

}

av_cold void ff_xvid_rate_control_uninit(MpegEncContext *s)

{

    xvid_plg_destroy_t xvid_plg_destroy;

    xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_DESTROY, &xvid_plg_destroy, NULL);

}