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libxvid_rc.c
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1 /*
2  * Xvid rate control wrapper for lavc video encoders
3  *
4  * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * This file is part of FFmpeg.
7  *
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.
12  *
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.
17  *
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
21  */
22 
23 #include "config.h"
24 #include <xvid.h>
25 #include "libavutil/attributes.h"
26 #include "libavutil/file.h"
27 #include "avcodec.h"
28 #include "libxvid.h"
29 #include "mpegvideo.h"
30 
31 #if HAVE_UNISTD_H
32 #include <unistd.h>
33 #endif
34 
35 #undef NDEBUG
36 #include <assert.h>
37 
39 {
40  char *tmp_name;
41  int fd, i;
42  xvid_plg_create_t xvid_plg_create = { 0 };
43  xvid_plugin_2pass2_t xvid_2pass2 = { 0 };
44 
45  fd=av_tempfile("xvidrc.", &tmp_name, 0, s->avctx);
46  if (fd == -1) {
47  av_log(NULL, AV_LOG_ERROR, "Can't create temporary pass2 file.\n");
48  return -1;
49  }
50 
51  for(i=0; i<s->rc_context.num_entries; i++){
52  static const char frame_types[] = " ipbs";
53  char tmp[256];
54  RateControlEntry *rce;
55 
56  rce= &s->rc_context.entry[i];
57 
58  snprintf(tmp, sizeof(tmp), "%c %d %d %d %d %d %d\n",
59  frame_types[rce->pict_type], (int)lrintf(rce->qscale / FF_QP2LAMBDA), rce->i_count, s->mb_num - rce->i_count - rce->skip_count,
60  rce->skip_count, (rce->i_tex_bits + rce->p_tex_bits + rce->misc_bits+7)/8, (rce->header_bits+rce->mv_bits+7)/8);
61 
62  if (write(fd, tmp, strlen(tmp)) < 0) {
63  av_log(NULL, AV_LOG_ERROR, "Error %s writing 2pass logfile\n", strerror(errno));
64  av_free(tmp_name);
65  close(fd);
66  return AVERROR(errno);
67  }
68  }
69 
70  close(fd);
71 
72  xvid_2pass2.version= XVID_MAKE_VERSION(1,1,0);
73  xvid_2pass2.filename= tmp_name;
74  xvid_2pass2.bitrate= s->avctx->bit_rate;
75  xvid_2pass2.vbv_size= s->avctx->rc_buffer_size;
76  xvid_2pass2.vbv_maxrate= s->avctx->rc_max_rate;
77  xvid_2pass2.vbv_initial= s->avctx->rc_initial_buffer_occupancy;
78 
79  xvid_plg_create.version= XVID_MAKE_VERSION(1,1,0);
80  xvid_plg_create.fbase= s->avctx->time_base.den;
81  xvid_plg_create.fincr= s->avctx->time_base.num;
82  xvid_plg_create.param= &xvid_2pass2;
83 
84  if(xvid_plugin_2pass2(NULL, XVID_PLG_CREATE, &xvid_plg_create, &s->rc_context.non_lavc_opaque)<0){
85  av_log(NULL, AV_LOG_ERROR, "xvid_plugin_2pass2 failed\n");
86  return -1;
87  }
88  return 0;
89 }
90 
92  xvid_plg_data_t xvid_plg_data = { 0 };
93 
94  xvid_plg_data.version= XVID_MAKE_VERSION(1,1,0);
95  xvid_plg_data.width = s->width;
96  xvid_plg_data.height= s->height;
97  xvid_plg_data.mb_width = s->mb_width;
98  xvid_plg_data.mb_height= s->mb_height;
99  xvid_plg_data.fbase= s->avctx->time_base.den;
100  xvid_plg_data.fincr= s->avctx->time_base.num;
101  xvid_plg_data.min_quant[0]= s->avctx->qmin;
102  xvid_plg_data.min_quant[1]= s->avctx->qmin;
103  xvid_plg_data.min_quant[2]= s->avctx->qmin; //FIXME i/b factor & offset
104  xvid_plg_data.max_quant[0]= s->avctx->qmax;
105  xvid_plg_data.max_quant[1]= s->avctx->qmax;
106  xvid_plg_data.max_quant[2]= s->avctx->qmax; //FIXME i/b factor & offset
107  xvid_plg_data.bquant_offset = 0; // 100 * s->avctx->b_quant_offset;
108  xvid_plg_data.bquant_ratio = 100; // * s->avctx->b_quant_factor;
109 
110  if(!s->rc_context.dry_run_qscale){
111  if(s->picture_number){
112  xvid_plg_data.length=
113  xvid_plg_data.stats.length= (s->frame_bits + 7)/8;
114  xvid_plg_data.frame_num= s->rc_context.last_picture_number;
115  xvid_plg_data.quant= s->qscale;
116 
117  xvid_plg_data.type= s->last_pict_type;
118  if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_AFTER, &xvid_plg_data, NULL)){
119  av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_AFTER, ...) FAILED\n");
120  return -1;
121  }
122  }
124  xvid_plg_data.frame_num= s->picture_number;
125  xvid_plg_data.quant= 0;
126  if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_BEFORE, &xvid_plg_data, NULL)){
127  av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_BEFORE, ...) FAILED\n");
128  return -1;
129  }
130  s->rc_context.dry_run_qscale= xvid_plg_data.quant;
131  }
132  xvid_plg_data.quant= s->rc_context.dry_run_qscale;
133  if(!dry_run)
135 
136  if(s->pict_type == AV_PICTURE_TYPE_B) //FIXME this is not exactly identical to xvid
137  return xvid_plg_data.quant * FF_QP2LAMBDA * s->avctx->b_quant_factor + s->avctx->b_quant_offset;
138  else
139  return xvid_plg_data.quant * FF_QP2LAMBDA;
140 }
141 
143 {
144  xvid_plg_destroy_t xvid_plg_destroy;
145 
146  xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_DESTROY, &xvid_plg_destroy, NULL);
147 }