diff options
Diffstat (limited to 'libavcodec/libxvid_rc.c')
-rw-r--r-- | libavcodec/libxvid_rc.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/libavcodec/libxvid_rc.c b/libavcodec/libxvid_rc.c new file mode 100644 index 0000000..076c32c --- /dev/null +++ b/libavcodec/libxvid_rc.c @@ -0,0 +1,164 @@ +/* + * Xvid rate control wrapper for lavc video encoders + * + * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> + * + * This file is part of FFmpeg. + * + * FFmpeg 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. + * + * FFmpeg 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 FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "config.h" + +#if HAVE_IO_H +#include <io.h> +#endif + +#if HAVE_UNISTD_H +#include <unistd.h> +#endif + +#include <xvid.h> + +#include "libavutil/attributes.h" +#include "libavutil/internal.h" + +#include "avcodec.h" +#include "libxvid.h" +#include "mpegvideo.h" + +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 = avpriv_tempfile("xvidrc.", &tmp_name, 0, s->avctx); + if (fd < 0) { + av_log(s, 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); + + if (write(fd, tmp, strlen(tmp)) < 0) { + int ret = AVERROR(errno); + av_log(s, AV_LOG_ERROR, "Error %s writing 2pass logfile\n", av_err2str(ret)); + av_free(tmp_name); + close(fd); + return ret; + } + } + + 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(s, 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, 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, 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); +} |