FFmpeg
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:444
int j_type_bit
Definition: wmv2.h:39
const char const char void * val
Definition: avisynth_c.h:863
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:440
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:208
#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
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
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:236
AVCodec.
Definition: avcodec.h:3492
int qscale
QP.
Definition: mpegvideo.h:204
int16_t * ff_h263_pred_motion(MpegEncContext *s, int block, int dir, int *px, int *py)
Definition: h263.c:307
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:1691
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:441
const AVOption ff_mpv_generic_options[]
Definition: mpegvideo_enc.c:85
The exact code depends on how similar the blocks are and how related they are to the block
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:1669
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:129
MpegEncContext s
Definition: wmv2.h:36
int flipflop_rounding
Definition: mpegvideo.h:437
static int get_bits_diff(MpegEncContext *s)
Definition: mpegvideo.h:752
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
const uint16_t ff_msmp4_mb_i_table[64][2]
Definition: msmpeg4data.c:43
int rl_chroma_table_index
Definition: mpegvideo.h:432
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
int per_mb_rl_table
Definition: mpegvideo.h:439
const char * name
Name of the codec implementation.
Definition: avcodec.h:3499
#define FFMIN(a, b)
Definition: common.h:96
uint8_t w
Definition: llviddspenc.c:38
int abt_type
Definition: wmv2.h:42
#define s(width, name)
Definition: cbs_vp9.c:257
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:86
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:1568
int ff_mpv_encode_init(AVCodecContext *avctx)
int extradata_size
Definition: avcodec.h:1670
Describe the class of an AVClass context structure.
Definition: log.h:67
int slice_height
in macroblocks
Definition: mpegvideo.h:435
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:212
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some it can consider them to be part of the FIFO and delay acknowledging a status change accordingly Example code
MpegEncContext.
Definition: mpegvideo.h:81
struct AVCodecContext * avctx
Definition: mpegvideo.h:98
PutBitContext pb
bit output
Definition: mpegvideo.h:151
#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:66
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:793
void * priv_data
Definition: avcodec.h:1595
av_cold void ff_wmv2_common_init(Wmv2Context *w)
Definition: wmv2.c:31
int64_t bit_rate
wanted bit rate
Definition: mpegvideo.h:103
int rl_table_index
Definition: mpegvideo.h:431
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:430
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
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:64
const uint8_t ff_table_inter_intra[4][2]
Definition: msmpeg4data.c:1844
int dc_table_index
Definition: mpegvideo.h:433
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