| 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 | |
| 42 | av_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) { |
| 71 | av_log(NULL, AV_LOG_ERROR, "Error %s writing 2pass logfile\n", strerror(errno)); |
| 72 | av_free(tmp_name); |
| 73 | close(fd); |
| 74 | return AVERROR(errno); |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | close(fd); |
| 79 | |
| 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; |
| 86 | |
| 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; |
| 91 | |
| 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"); |
| 95 | return -1; |
| 96 | } |
| 97 | return 0; |
| 98 | } |
| 99 | |
| 100 | float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run) |
| 101 | { |
| 102 | xvid_plg_data_t xvid_plg_data = { 0 }; |
| 103 | |
| 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; |
| 119 | |
| 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"); |
| 131 | return -1; |
| 132 | } |
| 133 | } |
| 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"); |
| 141 | return -1; |
| 142 | } |
| 143 | s->rc_context.dry_run_qscale = xvid_plg_data.quant; |
| 144 | } |
| 145 | xvid_plg_data.quant = s->rc_context.dry_run_qscale; |
| 146 | if (!dry_run) |
| 147 | s->rc_context.dry_run_qscale = 0; |
| 148 | |
| 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; |
| 153 | else |
| 154 | return xvid_plg_data.quant * FF_QP2LAMBDA; |
| 155 | } |
| 156 | |
| 157 | av_cold void ff_xvid_rate_control_uninit(MpegEncContext *s) |
| 158 | { |
| 159 | xvid_plg_destroy_t xvid_plg_destroy; |
| 160 | |
| 161 | xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_DESTROY, |
| 162 | &xvid_plg_destroy, NULL); |
| 163 | } |