/* * Xvid rate control wrapper for lavc video encoders * * Copyright (c) 2006 Michael Niedermayer * * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "config.h" #if !HAVE_MKSTEMP #include #endif #include #include #include "libavutil/attributes.h" #include "libavutil/internal.h" #include "avcodec.h" #include "libxvid.h" #include "mpegvideo.h" /* Wrapper to work around the lack of mkstemp() on mingw. * Also, tries to create file in /tmp first, if possible. * *prefix can be a character constant; *filename will be allocated internally. * @return file descriptor of opened file (or -1 on error) * and opened file name in **filename. */ int ff_tempfile(const char *prefix, char **filename) { int fd = -1; #if !HAVE_MKSTEMP *filename = tempnam(".", prefix); #else size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */ *filename = av_malloc(len); #endif /* -----common section-----*/ if (!(*filename)) { av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n"); return AVERROR(ENOMEM); } #if !HAVE_MKSTEMP fd = avpriv_open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444); #else snprintf(*filename, len, "/tmp/%sXXXXXX", prefix); fd = mkstemp(*filename); if (fd < 0) { snprintf(*filename, len, "./%sXXXXXX", prefix); fd = mkstemp(*filename); } #endif /* -----common section-----*/ if (fd < 0) { av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename); return AVERROR(EIO); } return fd; /* success */ } av_cold int ff_xvid_rate_control_init(MpegEncContext *s) { char *tmp_name; int fd, i; xvid_plg_create_t xvid_plg_create = { 0 }; xvid_plugin_2pass2_t xvid_2pass2 = { 0 }; fd = ff_tempfile("xvidrc.", &tmp_name); if (fd < 0) { av_log(NULL, AV_LOG_ERROR, "Can't create temporary pass2 file.\n"); return fd; } for (i = 0; i < s->rc_context.num_entries; i++) { static const char frame_types[] = " ipbs"; char tmp[256]; RateControlEntry *rce; rce = &s->rc_context.entry[i]; snprintf(tmp, sizeof(tmp), "%c %d %d %d %d %d %d\n", frame_types[rce->pict_type], (int) lrintf(rce->qscale / FF_QP2LAMBDA), rce->i_count, s->mb_num - rce->i_count - rce->skip_count, rce->skip_count, (rce->i_tex_bits + rce->p_tex_bits + rce->misc_bits + 7) / 8, (rce->header_bits + rce->mv_bits + 7) / 8); write(fd, tmp, strlen(tmp)); } close(fd); xvid_2pass2.version = XVID_MAKE_VERSION(1, 1, 0); xvid_2pass2.filename = tmp_name; xvid_2pass2.bitrate = s->avctx->bit_rate; xvid_2pass2.vbv_size = s->avctx->rc_buffer_size; xvid_2pass2.vbv_maxrate = s->avctx->rc_max_rate; xvid_2pass2.vbv_initial = s->avctx->rc_initial_buffer_occupancy; xvid_plg_create.version = XVID_MAKE_VERSION(1, 1, 0); xvid_plg_create.fbase = s->avctx->time_base.den; xvid_plg_create.fincr = s->avctx->time_base.num; xvid_plg_create.param = &xvid_2pass2; if (xvid_plugin_2pass2(NULL, XVID_PLG_CREATE, &xvid_plg_create, &s->rc_context.non_lavc_opaque) < 0) { av_log(NULL, AV_LOG_ERROR, "xvid_plugin_2pass2 failed\n"); return -1; } return 0; } float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run) { xvid_plg_data_t xvid_plg_data = { 0 }; xvid_plg_data.version = XVID_MAKE_VERSION(1, 1, 0); xvid_plg_data.width = s->width; xvid_plg_data.height = s->height; xvid_plg_data.mb_width = s->mb_width; xvid_plg_data.mb_height = s->mb_height; xvid_plg_data.fbase = s->avctx->time_base.den; xvid_plg_data.fincr = s->avctx->time_base.num; xvid_plg_data.min_quant[0] = s->avctx->qmin; xvid_plg_data.min_quant[1] = s->avctx->qmin; xvid_plg_data.min_quant[2] = s->avctx->qmin; // FIXME i/b factor & offset xvid_plg_data.max_quant[0] = s->avctx->qmax; xvid_plg_data.max_quant[1] = s->avctx->qmax; xvid_plg_data.max_quant[2] = s->avctx->qmax; // FIXME i/b factor & offset xvid_plg_data.bquant_offset = 0; // 100 * s->avctx->b_quant_offset; xvid_plg_data.bquant_ratio = 100; // * s->avctx->b_quant_factor; if (!s->rc_context.dry_run_qscale) { if (s->picture_number) { xvid_plg_data.length = xvid_plg_data.stats.length = (s->frame_bits + 7) / 8; xvid_plg_data.frame_num = s->rc_context.last_picture_number; xvid_plg_data.quant = s->qscale; xvid_plg_data.type = s->last_pict_type; if (xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_AFTER, &xvid_plg_data, NULL)) { av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_AFTER, ...) FAILED\n"); return -1; } } s->rc_context.last_picture_number = xvid_plg_data.frame_num = s->picture_number; xvid_plg_data.quant = 0; if (xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_BEFORE, &xvid_plg_data, NULL)) { av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_BEFORE, ...) FAILED\n"); return -1; } s->rc_context.dry_run_qscale = xvid_plg_data.quant; } xvid_plg_data.quant = s->rc_context.dry_run_qscale; if (!dry_run) s->rc_context.dry_run_qscale = 0; // FIXME this is not exactly identical to Xvid if (s->pict_type == AV_PICTURE_TYPE_B) return xvid_plg_data.quant * FF_QP2LAMBDA * s->avctx->b_quant_factor + s->avctx->b_quant_offset; else return xvid_plg_data.quant * FF_QP2LAMBDA; } av_cold void ff_xvid_rate_control_uninit(MpegEncContext *s) { xvid_plg_destroy_t xvid_plg_destroy; xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_DESTROY, &xvid_plg_destroy, NULL); }