3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
4 * Copyright (c) 2002-2004 Michael Niedermayer
6 * This file is part of FFmpeg.
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.
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.
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
23 #ifndef AVCODEC_RATECONTROL_H
24 #define AVCODEC_RATECONTROL_H
33 typedef struct Predictor{
39 typedef struct RateControlEntry{
47 uint64_t expected_bits;
59 * rate control context.
61 typedef struct RateControlContext{
63 int num_entries; ///< number of RateControlEntries
64 RateControlEntry *entry;
65 double buffer_index; ///< amount of bits in the video/audio buffer
67 double short_term_qsum; ///< sum of recent qscales
68 double short_term_qcount; ///< count of recent qscales
69 double pass1_rc_eq_output_sum;///< sum of the output of the rc equation, this is used for normalization
70 double pass1_wanted_bits; ///< bits which should have been outputed by the pass1 code (including complexity init)
72 double last_qscale_for[5]; ///< last qscale for a specific pict type, used for max_diff & ipb factor stuff
73 int last_mc_mb_var_sum;
75 uint64_t i_cplx_sum[5];
76 uint64_t p_cplx_sum[5];
77 uint64_t mv_bits_sum[5];
78 uint64_t qscale_sum[5];
80 int last_non_b_pict_type;
82 void *non_lavc_opaque; ///< context for non lavc rc code (for example xvid)
83 float dry_run_qscale; ///< for xvid rc
84 int last_picture_number; ///< for xvid rc
85 AVEvalExpr * rc_eq_eval;
88 struct MpegEncContext;
91 int ff_rate_control_init(struct MpegEncContext *s);
92 float ff_rate_estimate_qscale(struct MpegEncContext *s, int dry_run);
93 void ff_write_pass1_stats(struct MpegEncContext *s);
94 void ff_rate_control_uninit(struct MpegEncContext *s);
95 int ff_vbv_update(struct MpegEncContext *s, int frame_size);
96 void ff_get_2pass_fcode(struct MpegEncContext *s);
98 int ff_xvid_rate_control_init(struct MpegEncContext *s);
99 void ff_xvid_rate_control_uninit(struct MpegEncContext *s);
100 float ff_xvid_rate_estimate_qscale(struct MpegEncContext *s, int dry_run);
102 #endif /* AVCODEC_RATECONTROL_H */