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ffmpeg / libavcodec / libxvid_rc.c @ 2912e87a

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/*
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 * Xvid rate control wrapper for lavc video encoders
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 *
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 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
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 *
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 * This file is part of Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * Libav is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with Libav; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include <xvid.h>
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#include <unistd.h>
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#include "avcodec.h"
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#include "libxvid_internal.h"
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//#include "dsputil.h"
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#include "mpegvideo.h"
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#undef NDEBUG
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#include <assert.h>
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extern unsigned int xvid_debug;
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int ff_xvid_rate_control_init(MpegEncContext *s){
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    char *tmp_name;
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    int fd, i;
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    xvid_plg_create_t xvid_plg_create;
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    xvid_plugin_2pass2_t xvid_2pass2;
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//xvid_debug=-1;
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    fd=ff_tempfile("xvidrc.", &tmp_name);
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    if (fd == -1) {
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        av_log(NULL, AV_LOG_ERROR, "Can't create temporary pass2 file.\n");
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        return -1;
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    }
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    for(i=0; i<s->rc_context.num_entries; i++){
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        static const char *frame_types = " ipbs";
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        char tmp[256];
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        RateControlEntry *rce;
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        rce= &s->rc_context.entry[i];
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        snprintf(tmp, sizeof(tmp), "%c %d %d %d %d %d %d\n",
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            frame_types[rce->pict_type], (int)lrintf(rce->qscale / FF_QP2LAMBDA), rce->i_count, s->mb_num - rce->i_count - rce->skip_count,
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            rce->skip_count, (rce->i_tex_bits + rce->p_tex_bits + rce->misc_bits+7)/8, (rce->header_bits+rce->mv_bits+7)/8);
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//av_log(NULL, AV_LOG_ERROR, "%s\n", tmp);
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        write(fd, tmp, strlen(tmp));
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    }
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    close(fd);
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    memset(&xvid_2pass2, 0, sizeof(xvid_2pass2));
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    xvid_2pass2.version= XVID_MAKE_VERSION(1,1,0);
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    xvid_2pass2.filename= tmp_name;
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    xvid_2pass2.bitrate= s->avctx->bit_rate;
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    xvid_2pass2.vbv_size= s->avctx->rc_buffer_size;
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    xvid_2pass2.vbv_maxrate= s->avctx->rc_max_rate;
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    xvid_2pass2.vbv_initial= s->avctx->rc_initial_buffer_occupancy;
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    memset(&xvid_plg_create, 0, sizeof(xvid_plg_create));
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    xvid_plg_create.version= XVID_MAKE_VERSION(1,1,0);
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    xvid_plg_create.fbase= s->avctx->time_base.den;
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    xvid_plg_create.fincr= s->avctx->time_base.num;
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    xvid_plg_create.param= &xvid_2pass2;
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    if(xvid_plugin_2pass2(NULL, XVID_PLG_CREATE, &xvid_plg_create, &s->rc_context.non_lavc_opaque)<0){
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        av_log(NULL, AV_LOG_ERROR, "xvid_plugin_2pass2 failed\n");
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        return -1;
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    }
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    return 0;
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}
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float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run){
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    xvid_plg_data_t xvid_plg_data;
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    memset(&xvid_plg_data, 0, sizeof(xvid_plg_data));
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    xvid_plg_data.version= XVID_MAKE_VERSION(1,1,0);
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    xvid_plg_data.width = s->width;
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    xvid_plg_data.height= s->height;
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    xvid_plg_data.mb_width = s->mb_width;
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    xvid_plg_data.mb_height= s->mb_height;
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    xvid_plg_data.fbase= s->avctx->time_base.den;
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    xvid_plg_data.fincr= s->avctx->time_base.num;
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    xvid_plg_data.min_quant[0]= s->avctx->qmin;
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    xvid_plg_data.min_quant[1]= s->avctx->qmin;
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    xvid_plg_data.min_quant[2]= s->avctx->qmin; //FIXME i/b factor & offset
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    xvid_plg_data.max_quant[0]= s->avctx->qmax;
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    xvid_plg_data.max_quant[1]= s->avctx->qmax;
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    xvid_plg_data.max_quant[2]= s->avctx->qmax; //FIXME i/b factor & offset
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    xvid_plg_data.bquant_offset = 0; //  100 * s->avctx->b_quant_offset;
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    xvid_plg_data.bquant_ratio = 100; // * s->avctx->b_quant_factor;
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#if 0
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    xvid_plg_data.stats.hlength= X
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#endif
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    if(!s->rc_context.dry_run_qscale){
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        if(s->picture_number){
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            xvid_plg_data.length=
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            xvid_plg_data.stats.length= (s->frame_bits + 7)/8;
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            xvid_plg_data.frame_num= s->rc_context.last_picture_number;
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            xvid_plg_data.quant= s->qscale;
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            xvid_plg_data.type= s->last_pict_type;
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            if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_AFTER, &xvid_plg_data, NULL)){
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                av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_AFTER, ...) FAILED\n");
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                return -1;
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            }
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        }
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        s->rc_context.last_picture_number=
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        xvid_plg_data.frame_num= s->picture_number;
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        xvid_plg_data.quant= 0;
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        if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_BEFORE, &xvid_plg_data, NULL)){
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            av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_BEFORE, ...) FAILED\n");
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            return -1;
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        }
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        s->rc_context.dry_run_qscale= xvid_plg_data.quant;
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    }
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    xvid_plg_data.quant= s->rc_context.dry_run_qscale;
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    if(!dry_run)
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        s->rc_context.dry_run_qscale= 0;
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    if(s->pict_type == FF_B_TYPE) //FIXME this is not exactly identical to xvid
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        return xvid_plg_data.quant * FF_QP2LAMBDA * s->avctx->b_quant_factor + s->avctx->b_quant_offset;
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    else
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        return xvid_plg_data.quant * FF_QP2LAMBDA;
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}
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void ff_xvid_rate_control_uninit(MpegEncContext *s){
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    xvid_plg_destroy_t xvid_plg_destroy;
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    xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_DESTROY, &xvid_plg_destroy, NULL);
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}
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