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 <xvid.h>
24#include <unistd.h>
25#include "avcodec.h"
26#include "libxvid_internal.h"
27//#include "dsputil.h"
28#include "mpegvideo.h"
29
30#undef NDEBUG
31#include <assert.h>
32
33extern unsigned int xvid_debug;
34
35int ff_xvid_rate_control_init(MpegEncContext *s){
36    char *tmp_name;
37    int fd, i;
38    xvid_plg_create_t xvid_plg_create;
39    xvid_plugin_2pass2_t xvid_2pass2;
40
41//xvid_debug=-1;
42
43    fd=av_tempfile("xvidrc.", &tmp_name);
44    if (fd == -1) {
45        av_log(NULL, AV_LOG_ERROR, "Can't create temporary pass2 file.\n");
46        return -1;
47    }
48
49    for(i=0; i<s->rc_context.num_entries; i++){
50        static const char *frame_types = " ipbs";
51        char tmp[256];
52        RateControlEntry *rce;
53
54        rce= &s->rc_context.entry[i];
55
56        snprintf(tmp, sizeof(tmp), "%c %d %d %d %d %d %d\n",
57            frame_types[rce->pict_type], (int)lrintf(rce->qscale / FF_QP2LAMBDA), rce->i_count, s->mb_num - rce->i_count - rce->skip_count,
58            rce->skip_count, (rce->i_tex_bits + rce->p_tex_bits + rce->misc_bits+7)/8, (rce->header_bits+rce->mv_bits+7)/8);
59
60//av_log(NULL, AV_LOG_ERROR, "%s\n", tmp);
61        write(fd, tmp, strlen(tmp));
62    }
63
64    close(fd);
65
66    memset(&xvid_2pass2, 0, sizeof(xvid_2pass2));
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;
73
74    memset(&xvid_plg_create, 0, sizeof(xvid_plg_create));
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;
79
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");
82        return -1;
83    }
84    return 0;
85}
86
87float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run){
88    xvid_plg_data_t xvid_plg_data;
89
90    memset(&xvid_plg_data, 0, sizeof(xvid_plg_data));
91    xvid_plg_data.version= XVID_MAKE_VERSION(1,1,0);
92    xvid_plg_data.width = s->width;
93    xvid_plg_data.height= s->height;
94    xvid_plg_data.mb_width = s->mb_width;
95    xvid_plg_data.mb_height= s->mb_height;
96    xvid_plg_data.fbase= s->avctx->time_base.den;
97    xvid_plg_data.fincr= s->avctx->time_base.num;
98    xvid_plg_data.min_quant[0]= s->avctx->qmin;
99    xvid_plg_data.min_quant[1]= s->avctx->qmin;
100    xvid_plg_data.min_quant[2]= s->avctx->qmin; //FIXME i/b factor & offset
101    xvid_plg_data.max_quant[0]= s->avctx->qmax;
102    xvid_plg_data.max_quant[1]= s->avctx->qmax;
103    xvid_plg_data.max_quant[2]= s->avctx->qmax; //FIXME i/b factor & offset
104    xvid_plg_data.bquant_offset = 0; //  100 * s->avctx->b_quant_offset;
105    xvid_plg_data.bquant_ratio = 100; // * s->avctx->b_quant_factor;
106
107#if 0
108    xvid_plg_data.stats.hlength= X
109#endif
110
111    if(!s->rc_context.dry_run_qscale){
112        if(s->picture_number){
113            xvid_plg_data.length=
114            xvid_plg_data.stats.length= (s->frame_bits + 7)/8;
115            xvid_plg_data.frame_num= s->rc_context.last_picture_number;
116            xvid_plg_data.quant= s->qscale;
117
118            xvid_plg_data.type= s->last_pict_type;
119            if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_AFTER, &xvid_plg_data, NULL)){
120                av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_AFTER, ...) FAILED\n");
121                return -1;
122            }
123        }
124        s->rc_context.last_picture_number=
125        xvid_plg_data.frame_num= s->picture_number;
126        xvid_plg_data.quant= 0;
127        if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_BEFORE, &xvid_plg_data, NULL)){
128            av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_BEFORE, ...) FAILED\n");
129            return -1;
130        }
131        s->rc_context.dry_run_qscale= xvid_plg_data.quant;
132    }
133    xvid_plg_data.quant= s->rc_context.dry_run_qscale;
134    if(!dry_run)
135        s->rc_context.dry_run_qscale= 0;
136
137    if(s->pict_type == FF_B_TYPE) //FIXME this is not exactly identical to xvid
138        return xvid_plg_data.quant * FF_QP2LAMBDA * s->avctx->b_quant_factor + s->avctx->b_quant_offset;
139    else
140        return xvid_plg_data.quant * FF_QP2LAMBDA;
141}
142
143void ff_xvid_rate_control_uninit(MpegEncContext *s){
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
149