FFmpeg: libavcodec/ratecontrol.h Source File

FFmpeg
ratecontrol.h
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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 output 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 #endif /* AVCODEC_RATECONTROL_H */
Predictor
Predictor
Definition: huffyuv.h:49
s
const char * s
Definition: avisynth_c.h:768
RateControlContext
rate control context.
Definition: ratecontrol.h:63
RateControlContext::pass1_rc_eq_output_sum
double pass1_rc_eq_output_sum
sum of the output of the rc equation, this is used for normalization
Definition: ratecontrol.h:70
RateControlContext::last_qscale
double last_qscale
Definition: ratecontrol.h:72
RateControlContext::entry
RateControlEntry * entry
Definition: ratecontrol.h:65
Predictor::count
double count
Definition: ratecontrol.h:37
ff_write_pass1_stats
void ff_write_pass1_stats(struct MpegEncContext *s)
Definition: ratecontrol.c:38
AVExpr
Definition: eval.c:150
RateControlContext::num_entries
int num_entries
number of RateControlEntries
Definition: ratecontrol.h:64
RateControlContext::last_mb_var_sum
int64_t last_mb_var_sum
Definition: ratecontrol.h:75
RateControlContext::dry_run_qscale
float dry_run_qscale
for xvid rc
Definition: ratecontrol.h:84
RateControlEntry::new_qscale
float new_qscale
Definition: ratecontrol.h:51
RateControlContext::rc_eq_eval
AVExpr * rc_eq_eval
Definition: ratecontrol.h:86
RateControlContext::last_non_b_pict_type
int last_non_b_pict_type
Definition: ratecontrol.h:81
RateControlContext::pass1_wanted_bits
double pass1_wanted_bits
bits which should have been output by the pass1 code (including complexity init)
Definition: ratecontrol.h:71
frame_size
int frame_size
Definition: mxfenc.c:1820
RateControlContext::frame_count
int frame_count[5]
Definition: ratecontrol.h:80
ff_rate_control_uninit
void ff_rate_control_uninit(struct MpegEncContext *s)
Definition: ratecontrol.c:672
RateControlContext::buffer_index
double buffer_index
amount of bits in the video/audio buffer
Definition: ratecontrol.h:66
Predictor::decay
double decay
Definition: ratecontrol.h:38
Predictor::coeff
double coeff
Definition: ratecontrol.h:36
RateControlContext::last_mc_mb_var_sum
int64_t last_mc_mb_var_sum
Definition: ratecontrol.h:74
ff_vbv_update
int ff_vbv_update(struct MpegEncContext *s, int frame_size)
Definition: ratecontrol.c:681
ff_rate_control_init
int ff_rate_control_init(struct MpegEncContext *s)
Definition: ratecontrol.c:472
RateControlContext::last_picture_number
int last_picture_number
for xvid rc
Definition: ratecontrol.h:85
RateControlContext::p_cplx_sum
uint64_t p_cplx_sum[5]
Definition: ratecontrol.h:77
RateControlContext::last_qscale_for
double last_qscale_for[5]
last qscale for a specific pict type, used for max_diff & ipb factor stuff
Definition: ratecontrol.h:73
RateControlContext::i_cplx_sum
uint64_t i_cplx_sum[5]
Definition: ratecontrol.h:76
RateControlContext::short_term_qsum
double short_term_qsum
sum of recent qscales
Definition: ratecontrol.h:68
MpegEncContext
MpegEncContext.
Definition: mpegvideo.h:78
RateControlContext::mv_bits_sum
uint64_t mv_bits_sum[5]
Definition: ratecontrol.h:78
RateControlContext::non_lavc_opaque
void * non_lavc_opaque
context for non lavc rc code (for example xvid)
Definition: ratecontrol.h:83
ff_rate_estimate_qscale
float ff_rate_estimate_qscale(struct MpegEncContext *s, int dry_run)
Definition: ratecontrol.c:868
RateControlContext::qscale_sum
uint64_t qscale_sum[5]
Definition: ratecontrol.h:79
RateControlEntry::mc_mb_var_sum
int64_t mc_mb_var_sum
Definition: ratecontrol.h:52
RateControlEntry::mb_var_sum
int64_t mb_var_sum
Definition: ratecontrol.h:53
ff_get_2pass_fcode
void ff_get_2pass_fcode(struct MpegEncContext *s)
Definition: ratecontrol.c:857
RateControlEntry::expected_bits
uint64_t expected_bits
Definition: ratecontrol.h:49
RateControlContext::short_term_qcount
double short_term_qcount
count of recent qscales
Definition: ratecontrol.h:69
RateControlContext::pred
Predictor pred[5]
Definition: ratecontrol.h:67
eval.h
simple arithmetic expression evaluator
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