/* * Ratecontrol * Copyright (c) 2000, 2001, 2002 Fabrice Bellard * Copyright (c) 2002-2004 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 */ #ifndef AVCODEC_RATECONTROL_H #define AVCODEC_RATECONTROL_H /** * @file * ratecontrol header. */ #include <stdio.h> #include <stdint.h> #include "libavutil/eval.h" typedef struct Predictor{ double coeff; double count; double decay; } Predictor; typedef struct RateControlEntry{ int pict_type; float qscale; int mv_bits; int i_tex_bits; int p_tex_bits; int misc_bits; int header_bits; uint64_t expected_bits; int new_pict_type; float new_qscale; int mc_mb_var_sum; int mb_var_sum; int i_count; int skip_count; int f_code; int b_code; }RateControlEntry; /** * rate control context. */ typedef struct RateControlContext{ FILE *stats_file; int num_entries; ///< number of RateControlEntries RateControlEntry *entry; double buffer_index; ///< amount of bits in the video/audio buffer Predictor pred[5]; double short_term_qsum; ///< sum of recent qscales double short_term_qcount; ///< count of recent qscales double pass1_rc_eq_output_sum;///< sum of the output of the rc equation, this is used for normalization double pass1_wanted_bits; ///< bits which should have been outputed by the pass1 code (including complexity init) double last_qscale; double last_qscale_for[5]; ///< last qscale for a specific pict type, used for max_diff & ipb factor stuff int last_mc_mb_var_sum; int last_mb_var_sum; uint64_t i_cplx_sum[5]; uint64_t p_cplx_sum[5]; uint64_t mv_bits_sum[5]; uint64_t qscale_sum[5]; int frame_count[5]; int last_non_b_pict_type; void *non_lavc_opaque; ///< context for non lavc rc code (for example xvid) float dry_run_qscale; ///< for xvid rc int last_picture_number; ///< for xvid rc AVExpr * rc_eq_eval; }RateControlContext; struct MpegEncContext; /* rate control */ int ff_rate_control_init(struct MpegEncContext *s); float ff_rate_estimate_qscale(struct MpegEncContext *s, int dry_run); void ff_write_pass1_stats(struct MpegEncContext *s); void ff_rate_control_uninit(struct MpegEncContext *s); int ff_vbv_update(struct MpegEncContext *s, int frame_size); void ff_get_2pass_fcode(struct MpegEncContext *s); int ff_xvid_rate_control_init(struct MpegEncContext *s); void ff_xvid_rate_control_uninit(struct MpegEncContext *s); float ff_xvid_rate_estimate_qscale(struct MpegEncContext *s, int dry_run); #endif /* AVCODEC_RATECONTROL_H */