100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
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/*
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* Ratecontrol
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* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
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* Copyright (c) 2002-2004 Michael Niedermayer
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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#ifndef AVCODEC_RATECONTROL_H
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#define AVCODEC_RATECONTROL_H
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/**
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* @file
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* ratecontrol header.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include "libavutil/eval.h"
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typedef struct Predictor{
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double coeff;
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double count;
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double decay;
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} Predictor;
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typedef struct RateControlEntry{
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int pict_type;
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float qscale;
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int mv_bits;
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int i_tex_bits;
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int p_tex_bits;
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int misc_bits;
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int header_bits;
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uint64_t expected_bits;
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int new_pict_type;
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float new_qscale;
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int64_t mc_mb_var_sum;
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int64_t mb_var_sum;
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int i_count;
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int skip_count;
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int f_code;
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int b_code;
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}RateControlEntry;
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/**
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* rate control context.
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*/
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typedef struct RateControlContext{
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int num_entries; ///< number of RateControlEntries
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RateControlEntry *entry;
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double buffer_index; ///< amount of bits in the video/audio buffer
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Predictor pred[5];
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double short_term_qsum; ///< sum of recent qscales
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double short_term_qcount; ///< count of recent qscales
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double pass1_rc_eq_output_sum;///< sum of the output of the rc equation, this is used for normalization
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double pass1_wanted_bits; ///< bits which should have been output by the pass1 code (including complexity init)
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double last_qscale;
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double last_qscale_for[5]; ///< last qscale for a specific pict type, used for max_diff & ipb factor stuff
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int64_t last_mc_mb_var_sum;
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int64_t last_mb_var_sum;
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uint64_t i_cplx_sum[5];
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uint64_t p_cplx_sum[5];
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uint64_t mv_bits_sum[5];
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uint64_t qscale_sum[5];
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int frame_count[5];
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int last_non_b_pict_type;
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void *non_lavc_opaque; ///< context for non lavc rc code (for example xvid)
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float dry_run_qscale; ///< for xvid rc
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int last_picture_number; ///< for xvid rc
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AVExpr * rc_eq_eval;
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}RateControlContext;
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struct MpegEncContext;
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/* rate control */
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int ff_rate_control_init(struct MpegEncContext *s);
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float ff_rate_estimate_qscale(struct MpegEncContext *s, int dry_run);
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void ff_write_pass1_stats(struct MpegEncContext *s);
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void ff_rate_control_uninit(struct MpegEncContext *s);
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int ff_vbv_update(struct MpegEncContext *s, int frame_size);
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void ff_get_2pass_fcode(struct MpegEncContext *s);
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#endif /* AVCODEC_RATECONTROL_H */
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