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
38av_cold int ff_xvid_rate_control_init(MpegEncContext *s)
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
91float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run){
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        }
123        s->rc_context.last_picture_number=
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)
134        s->rc_context.dry_run_qscale= 0;
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
142av_cold void ff_xvid_rate_control_uninit(MpegEncContext *s)
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}
148