libxvid: K&R formatting cosmetics
[libav.git] / libavcodec / libxvid_rc.c
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 Libav.
7 *
8 * Libav 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 * Libav 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 Libav; 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_MKSTEMP
26 #include <fcntl.h>
27 #endif
28 #include <unistd.h>
29 #include <xvid.h>
30
31 #include "libavutil/attributes.h"
32 #include "libavutil/internal.h"
33
34 #include "avcodec.h"
35 #include "libxvid.h"
36 #include "mpegvideo.h"
37
38 /* Wrapper to work around the lack of mkstemp() on mingw.
39 * Also, tries to create file in /tmp first, if possible.
40 * *prefix can be a character constant; *filename will be allocated internally.
41 * @return file descriptor of opened file (or -1 on error)
42 * and opened file name in **filename. */
43 int ff_tempfile(const char *prefix, char **filename)
44 {
45 int fd = -1;
46 #if !HAVE_MKSTEMP
47 *filename = tempnam(".", prefix);
48 #else
49 size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
50 *filename = av_malloc(len);
51 #endif
52 /* -----common section-----*/
53 if (!(*filename)) {
54 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
55 return -1;
56 }
57 #if !HAVE_MKSTEMP
58 fd = avpriv_open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
59 #else
60 snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
61 fd = mkstemp(*filename);
62 if (fd < 0) {
63 snprintf(*filename, len, "./%sXXXXXX", prefix);
64 fd = mkstemp(*filename);
65 }
66 #endif
67 /* -----common section-----*/
68 if (fd < 0) {
69 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
70 return -1;
71 }
72 return fd; /* success */
73 }
74
75 av_cold int ff_xvid_rate_control_init(MpegEncContext *s)
76 {
77 char *tmp_name;
78 int fd, i;
79 xvid_plg_create_t xvid_plg_create = { 0 };
80 xvid_plugin_2pass2_t xvid_2pass2 = { 0 };
81
82 fd = ff_tempfile("xvidrc.", &tmp_name);
83 if (fd == -1) {
84 av_log(NULL, AV_LOG_ERROR, "Can't create temporary pass2 file.\n");
85 return -1;
86 }
87
88 for (i = 0; i < s->rc_context.num_entries; i++) {
89 static const char frame_types[] = " ipbs";
90 char tmp[256];
91 RateControlEntry *rce;
92
93 rce = &s->rc_context.entry[i];
94
95 snprintf(tmp, sizeof(tmp), "%c %d %d %d %d %d %d\n",
96 frame_types[rce->pict_type],
97 (int) lrintf(rce->qscale / FF_QP2LAMBDA),
98 rce->i_count, s->mb_num - rce->i_count - rce->skip_count,
99 rce->skip_count,
100 (rce->i_tex_bits + rce->p_tex_bits + rce->misc_bits + 7) / 8,
101 (rce->header_bits + rce->mv_bits + 7) / 8);
102
103 write(fd, tmp, strlen(tmp));
104 }
105
106 close(fd);
107
108 xvid_2pass2.version = XVID_MAKE_VERSION(1, 1, 0);
109 xvid_2pass2.filename = tmp_name;
110 xvid_2pass2.bitrate = s->avctx->bit_rate;
111 xvid_2pass2.vbv_size = s->avctx->rc_buffer_size;
112 xvid_2pass2.vbv_maxrate = s->avctx->rc_max_rate;
113 xvid_2pass2.vbv_initial = s->avctx->rc_initial_buffer_occupancy;
114
115 xvid_plg_create.version = XVID_MAKE_VERSION(1, 1, 0);
116 xvid_plg_create.fbase = s->avctx->time_base.den;
117 xvid_plg_create.fincr = s->avctx->time_base.num;
118 xvid_plg_create.param = &xvid_2pass2;
119
120 if (xvid_plugin_2pass2(NULL, XVID_PLG_CREATE, &xvid_plg_create,
121 &s->rc_context.non_lavc_opaque) < 0) {
122 av_log(NULL, AV_LOG_ERROR, "xvid_plugin_2pass2 failed\n");
123 return -1;
124 }
125 return 0;
126 }
127
128 float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run)
129 {
130 xvid_plg_data_t xvid_plg_data = { 0 };
131
132 xvid_plg_data.version = XVID_MAKE_VERSION(1, 1, 0);
133 xvid_plg_data.width = s->width;
134 xvid_plg_data.height = s->height;
135 xvid_plg_data.mb_width = s->mb_width;
136 xvid_plg_data.mb_height = s->mb_height;
137 xvid_plg_data.fbase = s->avctx->time_base.den;
138 xvid_plg_data.fincr = s->avctx->time_base.num;
139 xvid_plg_data.min_quant[0] = s->avctx->qmin;
140 xvid_plg_data.min_quant[1] = s->avctx->qmin;
141 xvid_plg_data.min_quant[2] = s->avctx->qmin; // FIXME i/b factor & offset
142 xvid_plg_data.max_quant[0] = s->avctx->qmax;
143 xvid_plg_data.max_quant[1] = s->avctx->qmax;
144 xvid_plg_data.max_quant[2] = s->avctx->qmax; // FIXME i/b factor & offset
145 xvid_plg_data.bquant_offset = 0; // 100 * s->avctx->b_quant_offset;
146 xvid_plg_data.bquant_ratio = 100; // * s->avctx->b_quant_factor;
147
148 if (!s->rc_context.dry_run_qscale) {
149 if (s->picture_number) {
150 xvid_plg_data.length =
151 xvid_plg_data.stats.length = (s->frame_bits + 7) / 8;
152 xvid_plg_data.frame_num = s->rc_context.last_picture_number;
153 xvid_plg_data.quant = s->qscale;
154 xvid_plg_data.type = s->last_pict_type;
155 if (xvid_plugin_2pass2(s->rc_context.non_lavc_opaque,
156 XVID_PLG_AFTER, &xvid_plg_data, NULL)) {
157 av_log(s->avctx, AV_LOG_ERROR,
158 "xvid_plugin_2pass2(handle, XVID_PLG_AFTER, ...) FAILED\n");
159 return -1;
160 }
161 }
162 s->rc_context.last_picture_number =
163 xvid_plg_data.frame_num = s->picture_number;
164 xvid_plg_data.quant = 0;
165 if (xvid_plugin_2pass2(s->rc_context.non_lavc_opaque,
166 XVID_PLG_BEFORE, &xvid_plg_data, NULL)) {
167 av_log(s->avctx, AV_LOG_ERROR,
168 "xvid_plugin_2pass2(handle, XVID_PLG_BEFORE, ...) FAILED\n");
169 return -1;
170 }
171 s->rc_context.dry_run_qscale = xvid_plg_data.quant;
172 }
173 xvid_plg_data.quant = s->rc_context.dry_run_qscale;
174 if (!dry_run)
175 s->rc_context.dry_run_qscale = 0;
176
177 // FIXME this is not exactly identical to Xvid
178 if (s->pict_type == AV_PICTURE_TYPE_B)
179 return xvid_plg_data.quant * FF_QP2LAMBDA * s->avctx->b_quant_factor +
180 s->avctx->b_quant_offset;
181 else
182 return xvid_plg_data.quant * FF_QP2LAMBDA;
183 }
184
185 av_cold void ff_xvid_rate_control_uninit(MpegEncContext *s)
186 {
187 xvid_plg_destroy_t xvid_plg_destroy;
188
189 xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_DESTROY,
190 &xvid_plg_destroy, NULL);
191 }