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