2 * Xvid rate control wrapper for lavc video encoders
4 * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of FFmpeg.
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.
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.
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
35 #include "libavutil/attributes.h"
36 #include "libavutil/file.h"
40 #include "mpegvideo.h"
42 av_cold int ff_xvid_rate_control_init(MpegEncContext *s)
46 xvid_plg_create_t xvid_plg_create = { 0 };
47 xvid_plugin_2pass2_t xvid_2pass2 = { 0 };
49 fd = av_tempfile("xvidrc.", &tmp_name, 0, s->avctx);
51 av_log(NULL, AV_LOG_ERROR, "Can't create temporary pass2 file.\n");
55 for (i = 0; i < s->rc_context.num_entries; i++) {
56 static const char frame_types[] = " ipbs";
58 RateControlEntry *rce;
60 rce = &s->rc_context.entry[i];
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,
67 (rce->i_tex_bits + rce->p_tex_bits + rce->misc_bits + 7) / 8,
68 (rce->header_bits + rce->mv_bits + 7) / 8);
70 if (write(fd, tmp, strlen(tmp)) < 0) {
71 av_log(NULL, AV_LOG_ERROR, "Error %s writing 2pass logfile\n", strerror(errno));
74 return AVERROR(errno);
80 xvid_2pass2.version = XVID_MAKE_VERSION(1, 1, 0);
81 xvid_2pass2.filename = tmp_name;
82 xvid_2pass2.bitrate = s->avctx->bit_rate;
83 xvid_2pass2.vbv_size = s->avctx->rc_buffer_size;
84 xvid_2pass2.vbv_maxrate = s->avctx->rc_max_rate;
85 xvid_2pass2.vbv_initial = s->avctx->rc_initial_buffer_occupancy;
87 xvid_plg_create.version = XVID_MAKE_VERSION(1, 1, 0);
88 xvid_plg_create.fbase = s->avctx->time_base.den;
89 xvid_plg_create.fincr = s->avctx->time_base.num;
90 xvid_plg_create.param = &xvid_2pass2;
92 if (xvid_plugin_2pass2(NULL, XVID_PLG_CREATE, &xvid_plg_create,
93 &s->rc_context.non_lavc_opaque) < 0) {
94 av_log(NULL, AV_LOG_ERROR, "xvid_plugin_2pass2 failed\n");
100 float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run)
102 xvid_plg_data_t xvid_plg_data = { 0 };
104 xvid_plg_data.version = XVID_MAKE_VERSION(1, 1, 0);
105 xvid_plg_data.width = s->width;
106 xvid_plg_data.height = s->height;
107 xvid_plg_data.mb_width = s->mb_width;
108 xvid_plg_data.mb_height = s->mb_height;
109 xvid_plg_data.fbase = s->avctx->time_base.den;
110 xvid_plg_data.fincr = s->avctx->time_base.num;
111 xvid_plg_data.min_quant[0] = s->avctx->qmin;
112 xvid_plg_data.min_quant[1] = s->avctx->qmin;
113 xvid_plg_data.min_quant[2] = s->avctx->qmin; // FIXME i/b factor & offset
114 xvid_plg_data.max_quant[0] = s->avctx->qmax;
115 xvid_plg_data.max_quant[1] = s->avctx->qmax;
116 xvid_plg_data.max_quant[2] = s->avctx->qmax; // FIXME i/b factor & offset
117 xvid_plg_data.bquant_offset = 0; // 100 * s->avctx->b_quant_offset;
118 xvid_plg_data.bquant_ratio = 100; // * s->avctx->b_quant_factor;
120 if (!s->rc_context.dry_run_qscale) {
121 if (s->picture_number) {
122 xvid_plg_data.length =
123 xvid_plg_data.stats.length = (s->frame_bits + 7) / 8;
124 xvid_plg_data.frame_num = s->rc_context.last_picture_number;
125 xvid_plg_data.quant = s->qscale;
126 xvid_plg_data.type = s->last_pict_type;
127 if (xvid_plugin_2pass2(s->rc_context.non_lavc_opaque,
128 XVID_PLG_AFTER, &xvid_plg_data, NULL)) {
129 av_log(s->avctx, AV_LOG_ERROR,
130 "xvid_plugin_2pass2(handle, XVID_PLG_AFTER, ...) FAILED\n");
134 s->rc_context.last_picture_number =
135 xvid_plg_data.frame_num = s->picture_number;
136 xvid_plg_data.quant = 0;
137 if (xvid_plugin_2pass2(s->rc_context.non_lavc_opaque,
138 XVID_PLG_BEFORE, &xvid_plg_data, NULL)) {
139 av_log(s->avctx, AV_LOG_ERROR,
140 "xvid_plugin_2pass2(handle, XVID_PLG_BEFORE, ...) FAILED\n");
143 s->rc_context.dry_run_qscale = xvid_plg_data.quant;
145 xvid_plg_data.quant = s->rc_context.dry_run_qscale;
147 s->rc_context.dry_run_qscale = 0;
149 // FIXME this is not exactly identical to Xvid
150 if (s->pict_type == AV_PICTURE_TYPE_B)
151 return xvid_plg_data.quant * FF_QP2LAMBDA * s->avctx->b_quant_factor +
152 s->avctx->b_quant_offset;
154 return xvid_plg_data.quant * FF_QP2LAMBDA;
157 av_cold void ff_xvid_rate_control_uninit(MpegEncContext *s)
159 xvid_plg_destroy_t xvid_plg_destroy;
161 xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_DESTROY,
162 &xvid_plg_destroy, NULL);