libxvid_rc.c
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1 /*
2  * Xvid rate control wrapper for lavc video encoders
3  *
4  * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * This file is part of Libav.
7  *
8  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include <xvid.h>
24 #include <unistd.h>
25 #include "avcodec.h"
26 #include "libxvid_internal.h"
27 //#include "dsputil.h"
28 #include "mpegvideo.h"
29 
30 #undef NDEBUG
31 #include <assert.h>
32 
33 extern unsigned int xvid_debug;
34 
36  char *tmp_name;
37  int fd, i;
38  xvid_plg_create_t xvid_plg_create;
39  xvid_plugin_2pass2_t xvid_2pass2;
40 
41 //xvid_debug=-1;
42 
43  fd=ff_tempfile("xvidrc.", &tmp_name);
44  if (fd == -1) {
45  av_log(NULL, AV_LOG_ERROR, "Can't create temporary pass2 file.\n");
46  return -1;
47  }
48 
49  for(i=0; i<s->rc_context.num_entries; i++){
50  static const char *frame_types = " ipbs";
51  char tmp[256];
52  RateControlEntry *rce;
53 
54  rce= &s->rc_context.entry[i];
55 
56  snprintf(tmp, sizeof(tmp), "%c %d %d %d %d %d %d\n",
57  frame_types[rce->pict_type], (int)lrintf(rce->qscale / FF_QP2LAMBDA), rce->i_count, s->mb_num - rce->i_count - rce->skip_count,
58  rce->skip_count, (rce->i_tex_bits + rce->p_tex_bits + rce->misc_bits+7)/8, (rce->header_bits+rce->mv_bits+7)/8);
59 
60 //av_log(NULL, AV_LOG_ERROR, "%s\n", tmp);
61  write(fd, tmp, strlen(tmp));
62  }
63 
64  close(fd);
65 
66  memset(&xvid_2pass2, 0, sizeof(xvid_2pass2));
67  xvid_2pass2.version= XVID_MAKE_VERSION(1,1,0);
68  xvid_2pass2.filename= tmp_name;
69  xvid_2pass2.bitrate= s->avctx->bit_rate;
70  xvid_2pass2.vbv_size= s->avctx->rc_buffer_size;
71  xvid_2pass2.vbv_maxrate= s->avctx->rc_max_rate;
72  xvid_2pass2.vbv_initial= s->avctx->rc_initial_buffer_occupancy;
73 
74  memset(&xvid_plg_create, 0, sizeof(xvid_plg_create));
75  xvid_plg_create.version= XVID_MAKE_VERSION(1,1,0);
76  xvid_plg_create.fbase= s->avctx->time_base.den;
77  xvid_plg_create.fincr= s->avctx->time_base.num;
78  xvid_plg_create.param= &xvid_2pass2;
79 
80  if(xvid_plugin_2pass2(NULL, XVID_PLG_CREATE, &xvid_plg_create, &s->rc_context.non_lavc_opaque)<0){
81  av_log(NULL, AV_LOG_ERROR, "xvid_plugin_2pass2 failed\n");
82  return -1;
83  }
84  return 0;
85 }
86 
88  xvid_plg_data_t xvid_plg_data;
89 
90  memset(&xvid_plg_data, 0, sizeof(xvid_plg_data));
91  xvid_plg_data.version= XVID_MAKE_VERSION(1,1,0);
92  xvid_plg_data.width = s->width;
93  xvid_plg_data.height= s->height;
94  xvid_plg_data.mb_width = s->mb_width;
95  xvid_plg_data.mb_height= s->mb_height;
96  xvid_plg_data.fbase= s->avctx->time_base.den;
97  xvid_plg_data.fincr= s->avctx->time_base.num;
98  xvid_plg_data.min_quant[0]= s->avctx->qmin;
99  xvid_plg_data.min_quant[1]= s->avctx->qmin;
100  xvid_plg_data.min_quant[2]= s->avctx->qmin; //FIXME i/b factor & offset
101  xvid_plg_data.max_quant[0]= s->avctx->qmax;
102  xvid_plg_data.max_quant[1]= s->avctx->qmax;
103  xvid_plg_data.max_quant[2]= s->avctx->qmax; //FIXME i/b factor & offset
104  xvid_plg_data.bquant_offset = 0; // 100 * s->avctx->b_quant_offset;
105  xvid_plg_data.bquant_ratio = 100; // * s->avctx->b_quant_factor;
106 
107 #if 0
108  xvid_plg_data.stats.hlength= X
109 #endif
110 
111  if(!s->rc_context.dry_run_qscale){
112  if(s->picture_number){
113  xvid_plg_data.length=
114  xvid_plg_data.stats.length= (s->frame_bits + 7)/8;
115  xvid_plg_data.frame_num= s->rc_context.last_picture_number;
116  xvid_plg_data.quant= s->qscale;
117 
118  xvid_plg_data.type= s->last_pict_type;
119  if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_AFTER, &xvid_plg_data, NULL)){
120  av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_AFTER, ...) FAILED\n");
121  return -1;
122  }
123  }
125  xvid_plg_data.frame_num= s->picture_number;
126  xvid_plg_data.quant= 0;
127  if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_BEFORE, &xvid_plg_data, NULL)){
128  av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_BEFORE, ...) FAILED\n");
129  return -1;
130  }
131  s->rc_context.dry_run_qscale= xvid_plg_data.quant;
132  }
133  xvid_plg_data.quant= s->rc_context.dry_run_qscale;
134  if(!dry_run)
136 
137  if(s->pict_type == AV_PICTURE_TYPE_B) //FIXME this is not exactly identical to xvid
138  return xvid_plg_data.quant * FF_QP2LAMBDA * s->avctx->b_quant_factor + s->avctx->b_quant_offset;
139  else
140  return xvid_plg_data.quant * FF_QP2LAMBDA;
141 }
142 
144  xvid_plg_destroy_t xvid_plg_destroy;
145 
146  xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_DESTROY, &xvid_plg_destroy, NULL);
147 }
148 
unsigned int xvid_debug
int frame_bits
bits used for the current frame
Definition: mpegvideo.h:456
RateControlContext rc_context
contains stuff only accessed in ratecontrol.c
Definition: mpegvideo.h:458
int picture_number
Definition: mpegvideo.h:235
RateControlEntry * entry
Definition: ratecontrol.h:66
int rc_initial_buffer_occupancy
Number of bits which should be loaded into the rc buffer before decoding starts.
Definition: avcodec.h:2343
int num
numerator
Definition: rational.h:44
mpegvideo header.
int mb_num
number of MBs of a picture
Definition: mpegvideo.h:242
int qscale
QP.
Definition: mpegvideo.h:324
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1398
common functions for use with the Xvid wrappers
float b_quant_factor
qscale factor between IP and B-frames If > 0 then the last P-frame quantizer will be used (q= lastp_q...
Definition: avcodec.h:1521
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:237
int num_entries
number of RateControlEntries
Definition: ratecontrol.h:65
int qmax
maximum quantizer
Definition: avcodec.h:1497
int rc_max_rate
maximum bitrate
Definition: avcodec.h:1816
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:140
int ff_xvid_rate_control_init(MpegEncContext *s)
Definition: libxvid_rc.c:35
int rc_buffer_size
decoder bitstream buffer size
Definition: avcodec.h:1830
float dry_run_qscale
for xvid rc
Definition: ratecontrol.h:85
int bit_rate
the average bitrate
Definition: avcodec.h:1340
static av_always_inline av_const long int lrintf(float x)
Definition: libm.h:69
void ff_xvid_rate_control_uninit(MpegEncContext *s)
Definition: libxvid_rc.c:143
NULL
Definition: eval.c:50
int ff_tempfile(const char *prefix, char **filename)
Definition: libxvidff.c:85
external API header
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:327
int qmin
minimum quantizer
Definition: avcodec.h:1490
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:205
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:111
int last_picture_number
for xvid rc
Definition: ratecontrol.h:86
float b_quant_offset
qscale offset between IP and B-frames
Definition: avcodec.h:1654
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:331
MpegEncContext.
Definition: mpegvideo.h:201
struct AVCodecContext * avctx
Definition: mpegvideo.h:203
void * non_lavc_opaque
context for non lavc rc code (for example xvid)
Definition: ratecontrol.h:84
int last_pict_type
Definition: mpegvideo.h:332
Bi-dir predicted.
Definition: avutil.h:298
int den
denominator
Definition: rational.h:45
#define FF_QP2LAMBDA
factor to convert from H.263 QP to lambda
Definition: avutil.h:250
float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run)
Definition: libxvid_rc.c:87