Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / libxvid_rc.c
CommitLineData
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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
25#if HAVE_IO_H
26#include <io.h>
27#endif
28
29#if HAVE_UNISTD_H
30#include <unistd.h>
31#endif
32
33#include <xvid.h>
34
35#include "libavutil/attributes.h"
36#include "libavutil/file.h"
37
38#include "avcodec.h"
39#include "libxvid.h"
40#include "mpegvideo.h"
41
42av_cold int ff_xvid_rate_control_init(MpegEncContext *s)
43{
44 char *tmp_name;
45 int fd, i;
46 xvid_plg_create_t xvid_plg_create = { 0 };
47 xvid_plugin_2pass2_t xvid_2pass2 = { 0 };
48
49 fd = av_tempfile("xvidrc.", &tmp_name, 0, s->avctx);
50 if (fd == -1) {
51 av_log(NULL, AV_LOG_ERROR, "Can't create temporary pass2 file.\n");
52 return -1;
53 }
54
55 for (i = 0; i < s->rc_context.num_entries; i++) {
56 static const char frame_types[] = " ipbs";
57 char tmp[256];
58 RateControlEntry *rce;
59
60 rce = &s->rc_context.entry[i];
61
62 snprintf(tmp, sizeof(tmp), "%c %d %d %d %d %d %d\n",
63 frame_types[rce->pict_type],
64 (int) lrintf(rce->qscale / FF_QP2LAMBDA),
65 rce->i_count, s->mb_num - rce->i_count - rce->skip_count,
66 rce->skip_count,
67 (rce->i_tex_bits + rce->p_tex_bits + rce->misc_bits + 7) / 8,
68 (rce->header_bits + rce->mv_bits + 7) / 8);
69
70 if (write(fd, tmp, strlen(tmp)) < 0) {
f6fa7814 71 int ret = AVERROR(errno);
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72 av_log(NULL, AV_LOG_ERROR, "Error %s writing 2pass logfile\n", strerror(errno));
73 av_free(tmp_name);
74 close(fd);
f6fa7814 75 return ret;
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76 }
77 }
78
79 close(fd);
80
81 xvid_2pass2.version = XVID_MAKE_VERSION(1, 1, 0);
82 xvid_2pass2.filename = tmp_name;
83 xvid_2pass2.bitrate = s->avctx->bit_rate;
84 xvid_2pass2.vbv_size = s->avctx->rc_buffer_size;
85 xvid_2pass2.vbv_maxrate = s->avctx->rc_max_rate;
86 xvid_2pass2.vbv_initial = s->avctx->rc_initial_buffer_occupancy;
87
88 xvid_plg_create.version = XVID_MAKE_VERSION(1, 1, 0);
89 xvid_plg_create.fbase = s->avctx->time_base.den;
90 xvid_plg_create.fincr = s->avctx->time_base.num;
91 xvid_plg_create.param = &xvid_2pass2;
92
93 if (xvid_plugin_2pass2(NULL, XVID_PLG_CREATE, &xvid_plg_create,
94 &s->rc_context.non_lavc_opaque) < 0) {
95 av_log(NULL, AV_LOG_ERROR, "xvid_plugin_2pass2 failed\n");
96 return -1;
97 }
98 return 0;
99}
100
101float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run)
102{
103 xvid_plg_data_t xvid_plg_data = { 0 };
104
105 xvid_plg_data.version = XVID_MAKE_VERSION(1, 1, 0);
106 xvid_plg_data.width = s->width;
107 xvid_plg_data.height = s->height;
108 xvid_plg_data.mb_width = s->mb_width;
109 xvid_plg_data.mb_height = s->mb_height;
110 xvid_plg_data.fbase = s->avctx->time_base.den;
111 xvid_plg_data.fincr = s->avctx->time_base.num;
112 xvid_plg_data.min_quant[0] = s->avctx->qmin;
113 xvid_plg_data.min_quant[1] = s->avctx->qmin;
114 xvid_plg_data.min_quant[2] = s->avctx->qmin; // FIXME i/b factor & offset
115 xvid_plg_data.max_quant[0] = s->avctx->qmax;
116 xvid_plg_data.max_quant[1] = s->avctx->qmax;
117 xvid_plg_data.max_quant[2] = s->avctx->qmax; // FIXME i/b factor & offset
118 xvid_plg_data.bquant_offset = 0; // 100 * s->avctx->b_quant_offset;
119 xvid_plg_data.bquant_ratio = 100; // * s->avctx->b_quant_factor;
120
121 if (!s->rc_context.dry_run_qscale) {
122 if (s->picture_number) {
123 xvid_plg_data.length =
124 xvid_plg_data.stats.length = (s->frame_bits + 7) / 8;
125 xvid_plg_data.frame_num = s->rc_context.last_picture_number;
126 xvid_plg_data.quant = s->qscale;
127 xvid_plg_data.type = s->last_pict_type;
128 if (xvid_plugin_2pass2(s->rc_context.non_lavc_opaque,
129 XVID_PLG_AFTER, &xvid_plg_data, NULL)) {
130 av_log(s->avctx, AV_LOG_ERROR,
131 "xvid_plugin_2pass2(handle, XVID_PLG_AFTER, ...) FAILED\n");
132 return -1;
133 }
134 }
135 s->rc_context.last_picture_number =
136 xvid_plg_data.frame_num = s->picture_number;
137 xvid_plg_data.quant = 0;
138 if (xvid_plugin_2pass2(s->rc_context.non_lavc_opaque,
139 XVID_PLG_BEFORE, &xvid_plg_data, NULL)) {
140 av_log(s->avctx, AV_LOG_ERROR,
141 "xvid_plugin_2pass2(handle, XVID_PLG_BEFORE, ...) FAILED\n");
142 return -1;
143 }
144 s->rc_context.dry_run_qscale = xvid_plg_data.quant;
145 }
146 xvid_plg_data.quant = s->rc_context.dry_run_qscale;
147 if (!dry_run)
148 s->rc_context.dry_run_qscale = 0;
149
150 // FIXME this is not exactly identical to Xvid
151 if (s->pict_type == AV_PICTURE_TYPE_B)
152 return xvid_plg_data.quant * FF_QP2LAMBDA * s->avctx->b_quant_factor +
153 s->avctx->b_quant_offset;
154 else
155 return xvid_plg_data.quant * FF_QP2LAMBDA;
156}
157
158av_cold void ff_xvid_rate_control_uninit(MpegEncContext *s)
159{
160 xvid_plg_destroy_t xvid_plg_destroy;
161
162 xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_DESTROY,
163 &xvid_plg_destroy, NULL);
164}