Libav
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 "h263.h"
23 #include "mpegvideo.h"
24 #include "msmpeg4.h"
25 #include "msmpeg4data.h"
26 #include "wmv2.h"
27 
28 
30 {
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 {
57  Wmv2Context *const w = avctx->priv_data;
58 
59  if (ff_mpv_encode_init(avctx) < 0)
60  return -1;
61 
63 
64  avctx->extradata_size = 4;
65  avctx->extradata = av_mallocz(avctx->extradata_size + 10);
66  if (!avctx->extradata)
67  return AVERROR(ENOMEM);
68 
70 
71  return 0;
72 }
73 
74 int ff_wmv2_encode_picture_header(MpegEncContext *s, int picture_number)
75 {
76  Wmv2Context *const w = (Wmv2Context *) s;
77 
78  put_bits(&s->pb, 1, s->pict_type - 1);
79  if (s->pict_type == AV_PICTURE_TYPE_I)
80  put_bits(&s->pb, 7, 0);
81  put_bits(&s->pb, 5, s->qscale);
82 
83  s->dc_table_index = 1;
84  s->mv_table_index = 1; /* only if P-frame */
85  s->per_mb_rl_table = 0;
86  s->mspel = 0;
87  w->per_mb_abt = 0;
88  w->abt_type = 0;
89  w->j_type = 0;
90 
91  assert(s->flipflop_rounding);
92 
93  if (s->pict_type == AV_PICTURE_TYPE_I) {
94  assert(s->no_rounding == 1);
95  if (w->j_type_bit)
96  put_bits(&s->pb, 1, w->j_type);
97 
98  if (w->per_mb_rl_bit)
99  put_bits(&s->pb, 1, s->per_mb_rl_table);
100 
101  if (!s->per_mb_rl_table) {
104  }
105 
106  put_bits(&s->pb, 1, s->dc_table_index);
107 
108  s->inter_intra_pred = 0;
109  } else {
110  int cbp_index;
111 
112  put_bits(&s->pb, 2, SKIP_TYPE_NONE);
113 
114  ff_msmpeg4_code012(&s->pb, cbp_index = 0);
115  if (s->qscale <= 10) {
116  int map[3] = { 0, 2, 1 };
117  w->cbp_table_index = map[cbp_index];
118  } else if (s->qscale <= 20) {
119  int map[3] = { 1, 0, 2 };
120  w->cbp_table_index = map[cbp_index];
121  } else {
122  int map[3] = { 2, 1, 0 };
123  w->cbp_table_index = map[cbp_index];
124  }
125 
126  if (w->mspel_bit)
127  put_bits(&s->pb, 1, s->mspel);
128 
129  if (w->abt_flag) {
130  put_bits(&s->pb, 1, w->per_mb_abt ^ 1);
131  if (!w->per_mb_abt)
132  ff_msmpeg4_code012(&s->pb, w->abt_type);
133  }
134 
135  if (w->per_mb_rl_bit)
136  put_bits(&s->pb, 1, s->per_mb_rl_table);
137 
138  if (!s->per_mb_rl_table) {
141  }
142  put_bits(&s->pb, 1, s->dc_table_index);
143  put_bits(&s->pb, 1, s->mv_table_index);
144 
145  s->inter_intra_pred = 0; // (s->width * s->height < 320 * 240 && s->bit_rate <= II_BITRATE);
146  }
147  s->esc3_level_length = 0;
148  s->esc3_run_length = 0;
149 
150  return 0;
151 }
152 
153 /* Nearly identical to wmv1 but that is just because we do not use the
154  * useless M$ crap features. It is duplicated here in case someone wants
155  * to add support for these crap features. */
156 void ff_wmv2_encode_mb(MpegEncContext *s, int16_t block[6][64],
157  int motion_x, int motion_y)
158 {
159  Wmv2Context *const w = (Wmv2Context *) s;
160  int cbp, coded_cbp, i;
161  int pred_x, pred_y;
162  uint8_t *coded_block;
163 
165 
166  if (!s->mb_intra) {
167  /* compute cbp */
168  cbp = 0;
169  for (i = 0; i < 6; i++)
170  if (s->block_last_index[i] >= 0)
171  cbp |= 1 << (5 - i);
172 
173  put_bits(&s->pb,
174  ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
175  ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
176 
177  /* motion vector */
178  ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
179  ff_msmpeg4_encode_motion(s, motion_x - pred_x,
180  motion_y - pred_y);
181  } else {
182  /* compute cbp */
183  cbp = 0;
184  coded_cbp = 0;
185  for (i = 0; i < 6; i++) {
186  int val, pred;
187  val = (s->block_last_index[i] >= 1);
188  cbp |= val << (5 - i);
189  if (i < 4) {
190  /* predict value for close blocks only for luma */
191  pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block);
192  *coded_block = val;
193  val = val ^ pred;
194  }
195  coded_cbp |= val << (5 - i);
196  }
197 
198  if (s->pict_type == AV_PICTURE_TYPE_I)
199  put_bits(&s->pb,
200  ff_msmp4_mb_i_table[coded_cbp][1],
201  ff_msmp4_mb_i_table[coded_cbp][0]);
202  else
203  put_bits(&s->pb,
206  put_bits(&s->pb, 1, 0); /* no AC prediction yet */
207  if (s->inter_intra_pred) {
208  s->h263_aic_dir = 0;
209  put_bits(&s->pb,
212  }
213  }
214 
215  for (i = 0; i < 6; i++)
216  ff_msmpeg4_encode_block(s, block[i], i);
217 }
218 
219 static const AVClass wmv2_class = {
220  .class_name = "wmv2 encoder",
221  .item_name = av_default_item_name,
222  .option = ff_mpv_generic_options,
223  .version = LIBAVUTIL_VERSION_INT,
224 };
225 
227  .name = "wmv2",
228  .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),
229  .type = AVMEDIA_TYPE_VIDEO,
230  .id = AV_CODEC_ID_WMV2,
231  .priv_data_size = sizeof(Wmv2Context),
232  .priv_class = &wmv2_class,
234  .encode2 = ff_mpv_encode_picture,
235  .close = ff_mpv_encode_end,
236  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
237  AV_PIX_FMT_NONE },
238 };
int inter_intra_pred
Definition: mpegvideo.h:427
int j_type_bit
Definition: wmv2.h:39
int esc3_level_length
Definition: mpegvideo.h:423
static int encode_ext_header(Wmv2Context *w)
Definition: wmv2enc.c:29
int per_mb_abt
Definition: wmv2.h:44
int num
numerator
Definition: rational.h:44
mpegvideo header.
int per_mb_rl_bit
Definition: wmv2.h:49
AVCodec.
Definition: avcodec.h:3120
int qscale
QP.
Definition: mpegvideo.h:199
int16_t * ff_h263_pred_motion(MpegEncContext *s, int block, int dir, int *px, int *py)
Definition: h263.c:309
static const AVClass wmv2_class
Definition: wmv2enc.c:219
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1535
static int16_t block[64]
Definition: dct.c:97
AVCodec ff_wmv2_encoder
Definition: wmv2enc.c:226
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:39
int esc3_run_length
Definition: mpegvideo.h:424
const AVOption ff_mpv_generic_options[]
Definition: mpegvideo_enc.c:80
uint8_t
#define av_cold
Definition: attributes.h:66
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:1523
int no_rounding
apply no rounding to motion compensation (MPEG-4, msmpeg4, ...) for B-frames rounding mode is always ...
Definition: mpegvideo.h:278
MSMPEG4 data tables.
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:124
MpegEncContext s
Definition: wmv2.h:36
int flipflop_rounding
Definition: mpegvideo.h:420
const uint16_t ff_msmp4_mb_i_table[64][2]
Definition: msmpeg4data.c:43
int rl_chroma_table_index
Definition: mpegvideo.h:415
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:148
int per_mb_rl_table
Definition: mpegvideo.h:422
const char * name
Name of the codec implementation.
Definition: avcodec.h:3127
static void put_bits(PutBitContext *s, int n, unsigned int value)
Write up to 31 bits into a bitstream.
Definition: put_bits.h:134
#define FFMIN(a, b)
Definition: common.h:66
int abt_type
Definition: wmv2.h:42
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:81
LIBAVUTIL_VERSION_INT
Definition: eval.c:55
void ff_msmpeg4_encode_motion(MpegEncContext *s, int mx, int my)
Definition: msmpeg4enc.c:297
static const float pred[4]
Definition: siprdata.h:259
int abt_flag
Definition: wmv2.h:41
Libavcodec external API header.
int cbp_table_index
Definition: wmv2.h:47
av_default_item_name
Definition: dnxhdenc.c:55
const uint32_t(*const [WMV2_INTER_CBP_TABLE_COUNT] ff_wmv2_inter_table)[2]
Definition: msmpeg4data.c:1956
main external API structure.
Definition: avcodec.h:1409
int ff_mpv_encode_init(AVCodecContext *avctx)
int extradata_size
Definition: avcodec.h:1524
Describe the class of an AVClass context structure.
Definition: log.h:34
int slice_height
in macroblocks
Definition: mpegvideo.h:418
const VDPAUPixFmtMap * map
void ff_msmpeg4_handle_slices(MpegEncContext *s)
Definition: msmpeg4enc.c:330
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:206
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:257
int bit_rate
wanted bit rate
Definition: mpegvideo.h:98
MpegEncContext.
Definition: mpegvideo.h:76
struct AVCodecContext * avctx
Definition: mpegvideo.h:93
PutBitContext pb
bit output
Definition: mpegvideo.h:146
#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:59
void ff_msmpeg4_code012(PutBitContext *pb, int n)
Definition: msmpeg4enc.c:71
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:83
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:48
int den
denominator
Definition: rational.h:45
int ff_mpv_encode_end(AVCodecContext *avctx)
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:582
void * priv_data
Definition: avcodec.h:1451
av_cold void ff_wmv2_common_init(Wmv2Context *w)
Definition: wmv2.c:31
int rl_table_index
Definition: mpegvideo.h:414
int mspel_bit
Definition: wmv2.h:46
int ff_msmpeg4_coded_block_pred(MpegEncContext *s, int n, uint8_t **coded_block_ptr)
Definition: msmpeg4.c:155
void ff_wmv2_encode_mb(MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y)
Definition: wmv2enc.c:156
int mv_table_index
Definition: mpegvideo.h:413
int h263_aic_dir
AIC direction: 0 = left, 1 = top.
Definition: mpegvideo.h:363
int ff_mpv_encode_picture(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
AVPixelFormat
Pixel format.
Definition: pixfmt.h:57
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:211
const uint8_t ff_table_inter_intra[4][2]
Definition: msmpeg4data.c:1844
int dc_table_index
Definition: mpegvideo.h:416
int top_left_mv_flag
Definition: wmv2.h:48
int j_type
Definition: wmv2.h:40
void ff_msmpeg4_encode_block(MpegEncContext *s, int16_t *block, int n)
Definition: msmpeg4enc.c:577
int ff_wmv2_encode_picture_header(MpegEncContext *s, int picture_number)
Definition: wmv2enc.c:74