ratecontrol.h (2916B)
1 /* 2 * Ratecontrol 3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard 4 * Copyright (c) 2002-2004 Michael Niedermayer 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * FFmpeg is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23 #ifndef AVCODEC_RATECONTROL_H 24 #define AVCODEC_RATECONTROL_H 25 26 /** 27 * @file 28 * ratecontrol header. 29 */ 30 31 #include <stdint.h> 32 33 typedef struct Predictor{ 34 double coeff; 35 double count; 36 double decay; 37 } Predictor; 38 39 typedef struct RateControlEntry{ 40 int pict_type; 41 float qscale; 42 int i_count; 43 int f_code; 44 int b_code; 45 int mv_bits; 46 int i_tex_bits; 47 int p_tex_bits; 48 int misc_bits; 49 int header_bits; 50 uint64_t expected_bits; 51 int new_pict_type; 52 float new_qscale; 53 int64_t mc_mb_var_sum; 54 int64_t mb_var_sum; 55 }RateControlEntry; 56 57 /** 58 * rate control context. 59 */ 60 typedef struct RateControlContext{ 61 int num_entries; ///< number of RateControlEntries 62 RateControlEntry *entry; 63 double buffer_index; ///< amount of bits in the video/audio buffer 64 Predictor pred[5]; 65 double short_term_qsum; ///< sum of recent qscales 66 double short_term_qcount; ///< count of recent qscales 67 double pass1_rc_eq_output_sum;///< sum of the output of the rc equation, this is used for normalization 68 double pass1_wanted_bits; ///< bits which should have been output by the pass1 code (including complexity init) 69 double last_qscale; 70 double last_qscale_for[5]; ///< last qscale for a specific pict type, used for max_diff & ipb factor stuff 71 int64_t last_mc_mb_var_sum; 72 int64_t last_mb_var_sum; 73 uint64_t i_cplx_sum[5]; 74 uint64_t p_cplx_sum[5]; 75 uint64_t mv_bits_sum[5]; 76 uint64_t qscale_sum[5]; 77 int frame_count[5]; 78 int last_non_b_pict_type; 79 80 struct AVExpr *rc_eq_eval; 81 }RateControlContext; 82 83 struct MpegEncContext; 84 85 /* rate control */ 86 int ff_rate_control_init(struct MpegEncContext *s); 87 float ff_rate_estimate_qscale(struct MpegEncContext *s, int dry_run); 88 void ff_write_pass1_stats(struct MpegEncContext *s); 89 int ff_vbv_update(struct MpegEncContext *s, int frame_size); 90 void ff_get_2pass_fcode(struct MpegEncContext *s); 91 void ff_rate_control_uninit(RateControlContext *rcc); 92 93 #endif /* AVCODEC_RATECONTROL_H */