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 "dsputil.h"
30 #include "mpegvideo.h"
35 int ff_xvid_rate_control_init(MpegEncContext *s){
38 xvid_plg_create_t xvid_plg_create = { 0 };
39 xvid_plugin_2pass2_t xvid_2pass2 = { 0 };
41 fd=av_tempfile("xvidrc.", &tmp_name, 0, s->avctx);
43 av_log(NULL, AV_LOG_ERROR, "Can't create temporary pass2 file.\n");
47 for(i=0; i<s->rc_context.num_entries; i++){
48 static const char frame_types[] = " ipbs";
50 RateControlEntry *rce;
52 rce= &s->rc_context.entry[i];
54 snprintf(tmp, sizeof(tmp), "%c %d %d %d %d %d %d\n",
55 frame_types[rce->pict_type], (int)lrintf(rce->qscale / FF_QP2LAMBDA), rce->i_count, s->mb_num - rce->i_count - rce->skip_count,
56 rce->skip_count, (rce->i_tex_bits + rce->p_tex_bits + rce->misc_bits+7)/8, (rce->header_bits+rce->mv_bits+7)/8);
58 if (write(fd, tmp, strlen(tmp)) < 0) {
59 av_log(NULL, AV_LOG_ERROR, "Error %s writing 2pass logfile\n", strerror(errno));
62 return AVERROR(errno);
68 xvid_2pass2.version= XVID_MAKE_VERSION(1,1,0);
69 xvid_2pass2.filename= tmp_name;
70 xvid_2pass2.bitrate= s->avctx->bit_rate;
71 xvid_2pass2.vbv_size= s->avctx->rc_buffer_size;
72 xvid_2pass2.vbv_maxrate= s->avctx->rc_max_rate;
73 xvid_2pass2.vbv_initial= s->avctx->rc_initial_buffer_occupancy;
75 xvid_plg_create.version= XVID_MAKE_VERSION(1,1,0);
76 xvid_plg_create.fbase= s->avctx->time_base.den;
77 xvid_plg_create.fincr= s->avctx->time_base.num;
78 xvid_plg_create.param= &xvid_2pass2;
80 if(xvid_plugin_2pass2(NULL, XVID_PLG_CREATE, &xvid_plg_create, &s->rc_context.non_lavc_opaque)<0){
81 av_log(NULL, AV_LOG_ERROR, "xvid_plugin_2pass2 failed\n");
87 float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run){
88 xvid_plg_data_t xvid_plg_data = { 0 };
90 xvid_plg_data.version= XVID_MAKE_VERSION(1,1,0);
91 xvid_plg_data.width = s->width;
92 xvid_plg_data.height= s->height;
93 xvid_plg_data.mb_width = s->mb_width;
94 xvid_plg_data.mb_height= s->mb_height;
95 xvid_plg_data.fbase= s->avctx->time_base.den;
96 xvid_plg_data.fincr= s->avctx->time_base.num;
97 xvid_plg_data.min_quant[0]= s->avctx->qmin;
98 xvid_plg_data.min_quant[1]= s->avctx->qmin;
99 xvid_plg_data.min_quant[2]= s->avctx->qmin; //FIXME i/b factor & offset
100 xvid_plg_data.max_quant[0]= s->avctx->qmax;
101 xvid_plg_data.max_quant[1]= s->avctx->qmax;
102 xvid_plg_data.max_quant[2]= s->avctx->qmax; //FIXME i/b factor & offset
103 xvid_plg_data.bquant_offset = 0; // 100 * s->avctx->b_quant_offset;
104 xvid_plg_data.bquant_ratio = 100; // * s->avctx->b_quant_factor;
106 if(!s->rc_context.dry_run_qscale){
107 if(s->picture_number){
108 xvid_plg_data.length=
109 xvid_plg_data.stats.length= (s->frame_bits + 7)/8;
110 xvid_plg_data.frame_num= s->rc_context.last_picture_number;
111 xvid_plg_data.quant= s->qscale;
113 xvid_plg_data.type= s->last_pict_type;
114 if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_AFTER, &xvid_plg_data, NULL)){
115 av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_AFTER, ...) FAILED\n");
119 s->rc_context.last_picture_number=
120 xvid_plg_data.frame_num= s->picture_number;
121 xvid_plg_data.quant= 0;
122 if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_BEFORE, &xvid_plg_data, NULL)){
123 av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_BEFORE, ...) FAILED\n");
126 s->rc_context.dry_run_qscale= xvid_plg_data.quant;
128 xvid_plg_data.quant= s->rc_context.dry_run_qscale;
130 s->rc_context.dry_run_qscale= 0;
132 if(s->pict_type == AV_PICTURE_TYPE_B) //FIXME this is not exactly identical to xvid
133 return xvid_plg_data.quant * FF_QP2LAMBDA * s->avctx->b_quant_factor + s->avctx->b_quant_offset;
135 return xvid_plg_data.quant * FF_QP2LAMBDA;
138 void ff_xvid_rate_control_uninit(MpegEncContext *s){
139 xvid_plg_destroy_t xvid_plg_destroy;
141 xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_DESTROY, &xvid_plg_destroy, NULL);