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wmv2enc.c
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1 /*
2  * Copyright (c) 2002 The FFmpeg Project
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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;
66  if (!avctx->extradata)
67  return AVERROR(ENOMEM);
68 
70 
71  return 0;
72 }
73 
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 
92 
93  if (s->pict_type == AV_PICTURE_TYPE_I) {
94  av_assert0(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  w->cbp_table_index = wmv2_get_cbp_table_index(s, cbp_index);
116 
117  if (w->mspel_bit)
118  put_bits(&s->pb, 1, s->mspel);
119 
120  if (w->abt_flag) {
121  put_bits(&s->pb, 1, w->per_mb_abt ^ 1);
122  if (!w->per_mb_abt)
123  ff_msmpeg4_code012(&s->pb, w->abt_type);
124  }
125 
126  if (w->per_mb_rl_bit)
127  put_bits(&s->pb, 1, s->per_mb_rl_table);
128 
129  if (!s->per_mb_rl_table) {
132  }
133  put_bits(&s->pb, 1, s->dc_table_index);
134  put_bits(&s->pb, 1, s->mv_table_index);
135 
136  s->inter_intra_pred = 0; // (s->width * s->height < 320 * 240 && s->bit_rate <= II_BITRATE);
137  }
138  s->esc3_level_length = 0;
139  s->esc3_run_length = 0;
140 
141  return 0;
142 }
143 
144 /* Nearly identical to wmv1 but that is just because we do not use the
145  * useless M$ crap features. It is duplicated here in case someone wants
146  * to add support for these crap features. */
147 void ff_wmv2_encode_mb(MpegEncContext *s, int16_t block[6][64],
148  int motion_x, int motion_y)
149 {
150  Wmv2Context *const w = (Wmv2Context *) s;
151  int cbp, coded_cbp, i;
152  int pred_x, pred_y;
153  uint8_t *coded_block;
154 
156 
157  if (!s->mb_intra) {
158  /* compute cbp */
159  cbp = 0;
160  for (i = 0; i < 6; i++)
161  if (s->block_last_index[i] >= 0)
162  cbp |= 1 << (5 - i);
163 
164  put_bits(&s->pb,
165  ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
166  ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
167 
168  s->misc_bits += get_bits_diff(s);
169  /* motion vector */
170  ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
171  ff_msmpeg4_encode_motion(s, motion_x - pred_x,
172  motion_y - pred_y);
173  s->mv_bits += get_bits_diff(s);
174  } else {
175  /* compute cbp */
176  cbp = 0;
177  coded_cbp = 0;
178  for (i = 0; i < 6; i++) {
179  int val, pred;
180  val = (s->block_last_index[i] >= 1);
181  cbp |= val << (5 - i);
182  if (i < 4) {
183  /* predict value for close blocks only for luma */
184  pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block);
185  *coded_block = val;
186  val = val ^ pred;
187  }
188  coded_cbp |= val << (5 - i);
189  }
190 
191  if (s->pict_type == AV_PICTURE_TYPE_I)
192  put_bits(&s->pb,
193  ff_msmp4_mb_i_table[coded_cbp][1],
194  ff_msmp4_mb_i_table[coded_cbp][0]);
195  else
196  put_bits(&s->pb,
199  put_bits(&s->pb, 1, 0); /* no AC prediction yet */
200  if (s->inter_intra_pred) {
201  s->h263_aic_dir = 0;
202  put_bits(&s->pb,
205  }
206  s->misc_bits += get_bits_diff(s);
207  }
208 
209  for (i = 0; i < 6; i++)
210  ff_msmpeg4_encode_block(s, block[i], i);
211  if (s->mb_intra)
212  s->i_tex_bits += get_bits_diff(s);
213  else
214  s->p_tex_bits += get_bits_diff(s);
215 }
216 
217 static const AVClass wmv2_class = {
218  .class_name = "wmv2 encoder",
219  .item_name = av_default_item_name,
220  .option = ff_mpv_generic_options,
221  .version = LIBAVUTIL_VERSION_INT,
222 };
223 
225  .name = "wmv2",
226  .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),
227  .type = AVMEDIA_TYPE_VIDEO,
228  .id = AV_CODEC_ID_WMV2,
229  .priv_data_size = sizeof(Wmv2Context),
230  .priv_class = &wmv2_class,
232  .encode2 = ff_mpv_encode_picture,
233  .close = ff_mpv_encode_end,
234  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
235  AV_PIX_FMT_NONE },
236 };
int inter_intra_pred
Definition: mpegvideo.h:441
int j_type_bit
Definition: wmv2.h:39
const char const char void * val
Definition: avisynth_c.h:771
const char * s
Definition: avisynth_c.h:768
static av_always_inline int wmv2_get_cbp_table_index(MpegEncContext *s, int cbp_index)
Definition: wmv2.h:74
int esc3_level_length
Definition: mpegvideo.h:437
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:206
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
static int encode_ext_header(Wmv2Context *w)
Definition: wmv2enc.c:29
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int per_mb_abt
Definition: wmv2.h:44
int num
Numerator.
Definition: rational.h:59
mpegvideo header.
int per_mb_rl_bit
Definition: wmv2.h:49
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
AVCodec.
Definition: avcodec.h:3599
int qscale
QP.
Definition: mpegvideo.h:201
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:217
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1812
static int16_t block[64]
Definition: dct.c:113
AVCodec ff_wmv2_encoder
Definition: wmv2enc.c:224
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:72
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int esc3_run_length
Definition: mpegvideo.h:438
const AVOption ff_mpv_generic_options[]
Definition: mpegvideo_enc.c:84
uint8_t
#define av_cold
Definition: attributes.h:82
static av_cold int wmv2_encode_init(AVCodecContext *avctx)
Definition: wmv2enc.c:55
int misc_bits
cbp, mb_type
Definition: mpegvideo.h:352
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1790
int no_rounding
apply no rounding to motion compensation (MPEG-4, msmpeg4, ...) for B-frames rounding mode is always ...
Definition: mpegvideo.h:284
MSMPEG4 data tables.
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:126
MpegEncContext s
Definition: wmv2.h:36
int flipflop_rounding
Definition: mpegvideo.h:434
static int get_bits_diff(MpegEncContext *s)
Definition: mpegvideo.h:744
const uint16_t ff_msmp4_mb_i_table[64][2]
Definition: msmpeg4data.c:43
int rl_chroma_table_index
Definition: mpegvideo.h:429
av_default_item_name
#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:176
int per_mb_rl_table
Definition: mpegvideo.h:436
const char * name
Name of the codec implementation.
Definition: avcodec.h:3606
#define FFMIN(a, b)
Definition: common.h:96
int abt_type
Definition: wmv2.h:42
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:83
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
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:1675
int ff_mpv_encode_init(AVCodecContext *avctx)
int extradata_size
Definition: avcodec.h:1791
Describe the class of an AVClass context structure.
Definition: log.h:67
int slice_height
in macroblocks
Definition: mpegvideo.h:432
void ff_msmpeg4_handle_slices(MpegEncContext *s)
Definition: msmpeg4enc.c:335
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:209
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:262
MpegEncContext.
Definition: mpegvideo.h:78
struct AVCodecContext * avctx
Definition: mpegvideo.h:95
PutBitContext pb
bit output
Definition: mpegvideo.h:148
#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:62
void ff_msmpeg4_code012(PutBitContext *pb, int n)
Definition: msmpeg4enc.c:70
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:101
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:60
int ff_mpv_encode_end(AVCodecContext *avctx)
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:733
void * priv_data
Definition: avcodec.h:1717
av_cold void ff_wmv2_common_init(Wmv2Context *w)
Definition: wmv2.c:31
int64_t bit_rate
wanted bit rate
Definition: mpegvideo.h:100
int rl_table_index
Definition: mpegvideo.h:428
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:153
void ff_wmv2_encode_mb(MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y)
Definition: wmv2enc.c:147
int mv_table_index
Definition: mpegvideo.h:427
int h263_aic_dir
AIC direction: 0 = left, 1 = top.
Definition: mpegvideo.h:376
int ff_mpv_encode_picture(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
const uint8_t ff_table_inter_intra[4][2]
Definition: msmpeg4data.c:1844
int dc_table_index
Definition: mpegvideo.h:430
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:582
int ff_wmv2_encode_picture_header(MpegEncContext *s, int picture_number)
Definition: wmv2enc.c:74