2 * Xvid rate control wrapper for lavc video encoders
4 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 #include "libavutil/file.h"
29 #include "mpegvideo.h"
34 int ff_xvid_rate_control_init(MpegEncContext *s){
37 xvid_plg_create_t xvid_plg_create = { 0 };
38 xvid_plugin_2pass2_t xvid_2pass2 = { 0 };
40 fd=av_tempfile("xvidrc.", &tmp_name, 0, s->avctx);
42 av_log(NULL, AV_LOG_ERROR, "Can't create temporary pass2 file.\n");
46 for(i=0; i<s->rc_context.num_entries; i++){
47 static const char frame_types[] = " ipbs";
49 RateControlEntry *rce;
51 rce= &s->rc_context.entry[i];
53 snprintf(tmp, sizeof(tmp), "%c %d %d %d %d %d %d\n",
54 frame_types[rce->pict_type], (int)lrintf(rce->qscale / FF_QP2LAMBDA), rce->i_count, s->mb_num - rce->i_count - rce->skip_count,
55 rce->skip_count, (rce->i_tex_bits + rce->p_tex_bits + rce->misc_bits+7)/8, (rce->header_bits+rce->mv_bits+7)/8);
57 if (write(fd, tmp, strlen(tmp)) < 0) {
58 av_log(NULL, AV_LOG_ERROR, "Error %s writing 2pass logfile\n", strerror(errno));
61 return AVERROR(errno);
67 xvid_2pass2.version= XVID_MAKE_VERSION(1,1,0);
68 xvid_2pass2.filename= tmp_name;
69 xvid_2pass2.bitrate= s->avctx->bit_rate;
70 xvid_2pass2.vbv_size= s->avctx->rc_buffer_size;
71 xvid_2pass2.vbv_maxrate= s->avctx->rc_max_rate;
72 xvid_2pass2.vbv_initial= s->avctx->rc_initial_buffer_occupancy;
74 xvid_plg_create.version= XVID_MAKE_VERSION(1,1,0);
75 xvid_plg_create.fbase= s->avctx->time_base.den;
76 xvid_plg_create.fincr= s->avctx->time_base.num;
77 xvid_plg_create.param= &xvid_2pass2;
79 if(xvid_plugin_2pass2(NULL, XVID_PLG_CREATE, &xvid_plg_create, &s->rc_context.non_lavc_opaque)<0){
80 av_log(NULL, AV_LOG_ERROR, "xvid_plugin_2pass2 failed\n");
86 float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run){
87 xvid_plg_data_t xvid_plg_data = { 0 };
89 xvid_plg_data.version= XVID_MAKE_VERSION(1,1,0);
90 xvid_plg_data.width = s->width;
91 xvid_plg_data.height= s->height;
92 xvid_plg_data.mb_width = s->mb_width;
93 xvid_plg_data.mb_height= s->mb_height;
94 xvid_plg_data.fbase= s->avctx->time_base.den;
95 xvid_plg_data.fincr= s->avctx->time_base.num;
96 xvid_plg_data.min_quant[0]= s->avctx->qmin;
97 xvid_plg_data.min_quant[1]= s->avctx->qmin;
98 xvid_plg_data.min_quant[2]= s->avctx->qmin; //FIXME i/b factor & offset
99 xvid_plg_data.max_quant[0]= s->avctx->qmax;
100 xvid_plg_data.max_quant[1]= s->avctx->qmax;
101 xvid_plg_data.max_quant[2]= s->avctx->qmax; //FIXME i/b factor & offset
102 xvid_plg_data.bquant_offset = 0; // 100 * s->avctx->b_quant_offset;
103 xvid_plg_data.bquant_ratio = 100; // * s->avctx->b_quant_factor;
105 if(!s->rc_context.dry_run_qscale){
106 if(s->picture_number){
107 xvid_plg_data.length=
108 xvid_plg_data.stats.length= (s->frame_bits + 7)/8;
109 xvid_plg_data.frame_num= s->rc_context.last_picture_number;
110 xvid_plg_data.quant= s->qscale;
112 xvid_plg_data.type= s->last_pict_type;
113 if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_AFTER, &xvid_plg_data, NULL)){
114 av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_AFTER, ...) FAILED\n");
118 s->rc_context.last_picture_number=
119 xvid_plg_data.frame_num= s->picture_number;
120 xvid_plg_data.quant= 0;
121 if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_BEFORE, &xvid_plg_data, NULL)){
122 av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_BEFORE, ...) FAILED\n");
125 s->rc_context.dry_run_qscale= xvid_plg_data.quant;
127 xvid_plg_data.quant= s->rc_context.dry_run_qscale;
129 s->rc_context.dry_run_qscale= 0;
131 if(s->pict_type == AV_PICTURE_TYPE_B) //FIXME this is not exactly identical to xvid
132 return xvid_plg_data.quant * FF_QP2LAMBDA * s->avctx->b_quant_factor + s->avctx->b_quant_offset;
134 return xvid_plg_data.quant * FF_QP2LAMBDA;
137 void ff_xvid_rate_control_uninit(MpegEncContext *s){
138 xvid_plg_destroy_t xvid_plg_destroy;
140 xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_DESTROY, &xvid_plg_destroy, NULL);