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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 <stdio.h> | |
32 | #include <stdint.h> | |
33 | #include "libavutil/eval.h" | |
34 | ||
35 | typedef struct Predictor{ | |
36 | double coeff; | |
37 | double count; | |
38 | double decay; | |
39 | } Predictor; | |
40 | ||
41 | typedef struct RateControlEntry{ | |
42 | int pict_type; | |
43 | float qscale; | |
44 | int mv_bits; | |
45 | int i_tex_bits; | |
46 | int p_tex_bits; | |
47 | int misc_bits; | |
48 | int header_bits; | |
49 | uint64_t expected_bits; | |
50 | int new_pict_type; | |
51 | float new_qscale; | |
52 | int64_t mc_mb_var_sum; | |
53 | int64_t mb_var_sum; | |
54 | int i_count; | |
55 | int skip_count; | |
56 | int f_code; | |
57 | int b_code; | |
58 | }RateControlEntry; | |
59 | ||
60 | /** | |
61 | * rate control context. | |
62 | */ | |
63 | typedef struct RateControlContext{ | |
64 | int num_entries; ///< number of RateControlEntries | |
65 | RateControlEntry *entry; | |
66 | double buffer_index; ///< amount of bits in the video/audio buffer | |
67 | Predictor pred[5]; | |
68 | double short_term_qsum; ///< sum of recent qscales | |
69 | double short_term_qcount; ///< count of recent qscales | |
70 | double pass1_rc_eq_output_sum;///< sum of the output of the rc equation, this is used for normalization | |
71 | double pass1_wanted_bits; ///< bits which should have been outputed by the pass1 code (including complexity init) | |
72 | double last_qscale; | |
73 | double last_qscale_for[5]; ///< last qscale for a specific pict type, used for max_diff & ipb factor stuff | |
74 | int64_t last_mc_mb_var_sum; | |
75 | int64_t last_mb_var_sum; | |
76 | uint64_t i_cplx_sum[5]; | |
77 | uint64_t p_cplx_sum[5]; | |
78 | uint64_t mv_bits_sum[5]; | |
79 | uint64_t qscale_sum[5]; | |
80 | int frame_count[5]; | |
81 | int last_non_b_pict_type; | |
82 | ||
83 | void *non_lavc_opaque; ///< context for non lavc rc code (for example xvid) | |
84 | float dry_run_qscale; ///< for xvid rc | |
85 | int last_picture_number; ///< for xvid rc | |
86 | AVExpr * rc_eq_eval; | |
87 | }RateControlContext; | |
88 | ||
89 | struct MpegEncContext; | |
90 | ||
91 | /* rate control */ | |
92 | int ff_rate_control_init(struct MpegEncContext *s); | |
93 | float ff_rate_estimate_qscale(struct MpegEncContext *s, int dry_run); | |
94 | void ff_write_pass1_stats(struct MpegEncContext *s); | |
95 | void ff_rate_control_uninit(struct MpegEncContext *s); | |
96 | int ff_vbv_update(struct MpegEncContext *s, int frame_size); | |
97 | void ff_get_2pass_fcode(struct MpegEncContext *s); | |
98 | ||
99 | int ff_xvid_rate_control_init(struct MpegEncContext *s); | |
100 | void ff_xvid_rate_control_uninit(struct MpegEncContext *s); | |
101 | float ff_xvid_rate_estimate_qscale(struct MpegEncContext *s, int dry_run); | |
102 | ||
103 | #endif /* AVCODEC_RATECONTROL_H */ |