wmv2enc.c
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1 /*
2  * Copyright (c) 2002 The Libav Project
3  *
4  * This file is part of Libav.
5  *
6  * Libav is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * Libav is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with Libav; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "avcodec.h"
22 #include "dsputil.h"
23 #include "mpegvideo.h"
24 #include "msmpeg4.h"
25 #include "msmpeg4data.h"
26 #include "h263.h"
27 #include "wmv2.h"
28 
29 
31  MpegEncContext * const s= &w->s;
32  PutBitContext pb;
33  int code;
34 
36 
37  put_bits(&pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); //yes 29.97 -> 29
38  put_bits(&pb, 11, FFMIN(s->bit_rate/1024, 2047));
39 
40  put_bits(&pb, 1, w->mspel_bit=1);
41  put_bits(&pb, 1, s->loop_filter);
42  put_bits(&pb, 1, w->abt_flag=1);
43  put_bits(&pb, 1, w->j_type_bit=1);
44  put_bits(&pb, 1, w->top_left_mv_flag=0);
45  put_bits(&pb, 1, w->per_mb_rl_bit=1);
46  put_bits(&pb, 3, code=1);
47 
48  flush_put_bits(&pb);
49 
50  s->slice_height = s->mb_height / code;
51 
52  return 0;
53 }
54 
56  Wmv2Context * const w= avctx->priv_data;
57 
58  if(ff_MPV_encode_init(avctx) < 0)
59  return -1;
60 
62 
63  avctx->extradata_size= 4;
64  avctx->extradata= av_mallocz(avctx->extradata_size + 10);
66 
67  return 0;
68 }
69 
70 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number)
71 {
72  Wmv2Context * const w= (Wmv2Context*)s;
73 
74  put_bits(&s->pb, 1, s->pict_type - 1);
75  if(s->pict_type == AV_PICTURE_TYPE_I){
76  put_bits(&s->pb, 7, 0);
77  }
78  put_bits(&s->pb, 5, s->qscale);
79 
80  s->dc_table_index = 1;
81  s->mv_table_index = 1; /* only if P frame */
82  s->per_mb_rl_table = 0;
83  s->mspel= 0;
84  w->per_mb_abt=0;
85  w->abt_type=0;
86  w->j_type=0;
87 
88  assert(s->flipflop_rounding);
89 
90  if (s->pict_type == AV_PICTURE_TYPE_I) {
91  assert(s->no_rounding==1);
92  if(w->j_type_bit) put_bits(&s->pb, 1, w->j_type);
93 
94  if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
95 
96  if(!s->per_mb_rl_table){
99  }
100 
101  put_bits(&s->pb, 1, s->dc_table_index);
102 
103  s->inter_intra_pred= 0;
104  }else{
105  int cbp_index;
106 
107  put_bits(&s->pb, 2, SKIP_TYPE_NONE);
108 
109  ff_msmpeg4_code012(&s->pb, cbp_index=0);
110  if(s->qscale <= 10){
111  int map[3]= {0,2,1};
112  w->cbp_table_index= map[cbp_index];
113  }else if(s->qscale <= 20){
114  int map[3]= {1,0,2};
115  w->cbp_table_index= map[cbp_index];
116  }else{
117  int map[3]= {2,1,0};
118  w->cbp_table_index= map[cbp_index];
119  }
120 
121  if(w->mspel_bit) put_bits(&s->pb, 1, s->mspel);
122 
123  if(w->abt_flag){
124  put_bits(&s->pb, 1, w->per_mb_abt^1);
125  if(!w->per_mb_abt){
126  ff_msmpeg4_code012(&s->pb, w->abt_type);
127  }
128  }
129 
130  if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
131 
132  if(!s->per_mb_rl_table){
135  }
136  put_bits(&s->pb, 1, s->dc_table_index);
137  put_bits(&s->pb, 1, s->mv_table_index);
138 
139  s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
140  }
141  s->esc3_level_length= 0;
142  s->esc3_run_length= 0;
143 
144  return 0;
145 }
146 
147 /* Nearly identical to wmv1 but that is just because we do not use the
148  * useless M$ crap features. It is duplicated here in case someone wants
149  * to add support for these crap features. */
151  DCTELEM block[6][64],
152  int motion_x, int motion_y)
153 {
154  Wmv2Context * const w= (Wmv2Context*)s;
155  int cbp, coded_cbp, i;
156  int pred_x, pred_y;
157  uint8_t *coded_block;
158 
160 
161  if (!s->mb_intra) {
162  /* compute cbp */
163  cbp = 0;
164  for (i = 0; i < 6; i++) {
165  if (s->block_last_index[i] >= 0)
166  cbp |= 1 << (5 - i);
167  }
168 
169  put_bits(&s->pb,
170  ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
171  ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
172 
173  /* motion vector */
174  ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
175  ff_msmpeg4_encode_motion(s, motion_x - pred_x,
176  motion_y - pred_y);
177  } else {
178  /* compute cbp */
179  cbp = 0;
180  coded_cbp = 0;
181  for (i = 0; i < 6; i++) {
182  int val, pred;
183  val = (s->block_last_index[i] >= 1);
184  cbp |= val << (5 - i);
185  if (i < 4) {
186  /* predict value for close blocks only for luma */
187  pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block);
188  *coded_block = val;
189  val = val ^ pred;
190  }
191  coded_cbp |= val << (5 - i);
192  }
193 
194  if (s->pict_type == AV_PICTURE_TYPE_I) {
195  put_bits(&s->pb,
196  ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]);
197  } else {
198  put_bits(&s->pb,
201  }
202  put_bits(&s->pb, 1, 0); /* no AC prediction yet */
203  if(s->inter_intra_pred){
204  s->h263_aic_dir=0;
206  }
207  }
208 
209  for (i = 0; i < 6; i++) {
210  ff_msmpeg4_encode_block(s, block[i], i);
211  }
212 }
213 
215  .name = "wmv2",
216  .type = AVMEDIA_TYPE_VIDEO,
217  .id = AV_CODEC_ID_WMV2,
218  .priv_data_size = sizeof(Wmv2Context),
220  .encode2 = ff_MPV_encode_picture,
222  .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
223  .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),
224 };
int inter_intra_pred
Definition: mpegvideo.h:622
int j_type_bit
Definition: wmv2.h:38
int esc3_level_length
Definition: mpegvideo.h:618
static int encode_ext_header(Wmv2Context *w)
Definition: wmv2enc.c:30
int ff_MPV_encode_end(AVCodecContext *avctx)
int per_mb_abt
Definition: wmv2.h:43
int num
numerator
Definition: rational.h:44
mpegvideo header.
int per_mb_rl_bit
Definition: wmv2.h:48
AVCodec.
Definition: avcodec.h:2960
int qscale
QP.
Definition: mpegvideo.h:342
int16_t * ff_h263_pred_motion(MpegEncContext *s, int block, int dir, int *px, int *py)
Definition: h263.c:316
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1465
AVCodec ff_wmv2_encoder
Definition: wmv2enc.c:214
int esc3_run_length
Definition: mpegvideo.h:619
uint8_t
static av_cold int wmv2_encode_init(AVCodecContext *avctx)
Definition: wmv2enc.c:55
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1454
int no_rounding
apply no rounding to motion compensation (MPEG4, msmpeg4, ...) for b-frames rounding mode is always 0...
Definition: mpegvideo.h:407
MSMPEG4 data tables.
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:247
MpegEncContext s
Definition: wmv2.h:36
int flipflop_rounding
Definition: mpegvideo.h:615
void ff_wmv2_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
Definition: wmv2enc.c:150
static int init(AVCodecParserContext *s)
Definition: h264_parser.c:335
int ff_MPV_encode_init(AVCodecContext *avctx)
const uint16_t ff_msmp4_mb_i_table[64][2]
Definition: msmpeg4data.c:41
int rl_chroma_table_index
Definition: mpegvideo.h:610
void ff_msmpeg4_encode_block(MpegEncContext *s, DCTELEM *block, int n)
Definition: msmpeg4enc.c:572
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:88
int per_mb_rl_table
Definition: mpegvideo.h:617
const char * name
Name of the codec implementation.
Definition: avcodec.h:2967
static void put_bits(PutBitContext *s, int n, unsigned int value)
Write up to 31 bits into a bitstream.
Definition: put_bits.h:136
static DCTELEM block[64]
Definition: dct-test.c:169
int abt_type
Definition: wmv2.h:41
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:261
void ff_msmpeg4_encode_motion(MpegEncContext *s, int mx, int my)
Definition: msmpeg4enc.c:286
static const float pred[4]
Definition: siprdata.h:259
int abt_flag
Definition: wmv2.h:40
external API header
int cbp_table_index
Definition: wmv2.h:46
main external API structure.
Definition: avcodec.h:1339
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:326
int extradata_size
Definition: avcodec.h:1455
struct Wmv2Context Wmv2Context
int slice_height
in macroblocks
Definition: mpegvideo.h:613
int ff_MPV_encode_picture(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
void ff_msmpeg4_handle_slices(MpegEncContext *s)
Definition: msmpeg4enc.c:324
short DCTELEM
Definition: dsputil.h:39
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:349
int bit_rate
wanted bit rate
Definition: mpegvideo.h:218
MpegEncContext.
Definition: mpegvideo.h:211
struct AVCodecContext * avctx
Definition: mpegvideo.h:213
PutBitContext pb
bit output
Definition: mpegvideo.h:284
#define SKIP_TYPE_NONE
Definition: wmv2.h:29
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:65
void ff_msmpeg4_code012(PutBitContext *pb, int n)
Definition: msmpeg4enc.c:64
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:86
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:52
int den
denominator
Definition: rational.h:45
DSP utils.
const uint32_t(*const [WMV2_INTER_CBP_TABLE_COUNT] ff_wmv2_inter_table)[2]
Definition: msmpeg4data.c:1986
void * priv_data
Definition: avcodec.h:1382
av_cold void ff_wmv2_common_init(Wmv2Context *w)
Definition: wmv2.c:28
int rl_table_index
Definition: mpegvideo.h:609
int mspel_bit
Definition: wmv2.h:45
int ff_msmpeg4_coded_block_pred(MpegEncContext *s, int n, uint8_t **coded_block_ptr)
Definition: msmpeg4.c:164
int mv_table_index
Definition: mpegvideo.h:608
int h263_aic_dir
AIC direction: 0 = left, 1 = top.
Definition: mpegvideo.h:525
AVPixelFormat
Pixel format.
Definition: pixfmt.h:63
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:158
const uint8_t ff_table_inter_intra[4][2]
Definition: msmpeg4data.c:1874
int dc_table_index
Definition: mpegvideo.h:611
int top_left_mv_flag
Definition: wmv2.h:47
int j_type
Definition: wmv2.h:39
int ff_wmv2_encode_picture_header(MpegEncContext *s, int picture_number)
Definition: wmv2enc.c:70