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 
35  init_put_bits(&pb, s->avctx->extradata, s->avctx->extradata_size);
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 
91  av_assert0(s->flipflop_rounding);
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) {
102  ff_msmpeg4_code012(&s->pb, s->rl_chroma_table_index);
103  ff_msmpeg4_code012(&s->pb, s->rl_table_index);
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) {
130  ff_msmpeg4_code012(&s->pb, s->rl_table_index);
131  s->rl_chroma_table_index = s->rl_table_index;
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,
197  ff_wmv2_inter_table[w->cbp_table_index][cbp][1],
198  ff_wmv2_inter_table[w->cbp_table_index][cbp][0]);
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,
203  ff_table_inter_intra[s->h263_aic_dir][1],
204  ff_table_inter_intra[s->h263_aic_dir][0]);
205  }
206  s->misc_bits += get_bits_diff(s);
207  }
208 
209  for (i = 0; i < 6; 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,
235  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
236  AV_PIX_FMT_NONE },
237 };
AVCodec
AVCodec.
Definition: codec.h:197
FF_CODEC_CAP_INIT_THREADSAFE
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:41
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
ff_msmpeg4_encode_block
void ff_msmpeg4_encode_block(MpegEncContext *s, int16_t *block, int n)
Definition: msmpeg4enc.c:553
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
AVERROR
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
ff_wmv2_encode_picture_header
int ff_wmv2_encode_picture_header(MpegEncContext *s, int picture_number)
Definition: wmv2enc.c:74
init_put_bits
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:61
put_bits
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:218
encode_ext_header
static int encode_ext_header(Wmv2Context *w)
Definition: wmv2enc.c:29
w
uint8_t w
Definition: llviddspenc.c:39
ff_wmv2_common_init
av_cold void ff_wmv2_common_init(Wmv2Context *w)
Definition: wmv2.c:31
ff_wmv2_encoder
const AVCodec ff_wmv2_encoder
Definition: wmv2enc.c:224
mpegvideo.h
wmv2_class
static const AVClass wmv2_class
Definition: wmv2enc.c:217
ff_msmp4_mb_i_table
const uint16_t ff_msmp4_mb_i_table[64][2]
Definition: msmpeg4data.c:42
wmv2_encode_init
static av_cold int wmv2_encode_init(AVCodecContext *avctx)
Definition: wmv2enc.c:55
ff_wmv2_inter_table
const uint32_t(*const [WMV2_INTER_CBP_TABLE_COUNT] ff_wmv2_inter_table)[2]
Definition: msmpeg4data.c:1953
ff_h263_pred_motion
int16_t * ff_h263_pred_motion(MpegEncContext *s, int block, int dir, int *px, int *py)
Definition: h263.c:307
val
static double val(void *priv, double ch)
Definition: aeval.c:76
av_cold
#define av_cold
Definition: attributes.h:90
wmv2_get_cbp_table_index
static av_always_inline int wmv2_get_cbp_table_index(MpegEncContext *s, int cbp_index)
Definition: wmv2.h:76
msmpeg4data.h
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:603
s
#define s(width, name)
Definition: cbs_vp9.c:257
ff_mpv_encode_init
int ff_mpv_encode_init(AVCodecContext *avctx)
Definition: mpegvideo_enc.c:302
AV_CODEC_ID_WMV2
@ AV_CODEC_ID_WMV2
Definition: codec_id.h:67
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
ff_mpv_encode_picture
int ff_mpv_encode_picture(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
Definition: mpegvideo_enc.c:1700
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:289
SKIP_TYPE_NONE
#define SKIP_TYPE_NONE
Definition: wmv2.h:31
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
PutBitContext
Definition: put_bits.h:49
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
wmv2.h
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
FFMIN
#define FFMIN(a, b)
Definition: common.h:105
ff_mpv_generic_options
const AVOption ff_mpv_generic_options[]
Definition: mpegvideo_enc.c:87
i
int i
Definition: input.c:407
code
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
Definition: filter_design.txt:178
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:602
FF_CODEC_CAP_INIT_CLEANUP
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:49
ff_msmpeg4_handle_slices
void ff_msmpeg4_handle_slices(MpegEncContext *s)
Definition: msmpeg4enc.c:321
ff_mpv_encode_end
int ff_mpv_encode_end(AVCodecContext *avctx)
Definition: mpegvideo_enc.c:952
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:243
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:204
ff_msmpeg4_encode_motion
void ff_msmpeg4_encode_motion(MpegEncContext *s, int mx, int my)
Definition: msmpeg4enc.c:288
avcodec.h
msmpeg4.h
get_bits_diff
static int get_bits_diff(MpegEncContext *s)
Definition: mpegvideo.h:765
pred
static const float pred[4]
Definition: siprdata.h:259
AVClass::class_name
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
AV_INPUT_BUFFER_PADDING_SIZE
#define AV_INPUT_BUFFER_PADDING_SIZE
Definition: avcodec.h:192
AVCodecContext
main external API structure.
Definition: avcodec.h:501
ff_table_inter_intra
const uint8_t ff_table_inter_intra[4][2]
Definition: msmpeg4data.c:1841
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
ff_msmpeg4_code012
void ff_msmpeg4_code012(PutBitContext *pb, int n)
Definition: msmpeg4enc.c:66
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
flush_put_bits
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:142
Wmv2Context
Definition: wmv2.h:37
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:528
block
The exact code depends on how similar the blocks are and how related they are to the block
Definition: filter_design.txt:207
MpegEncContext
MpegEncContext.
Definition: mpegvideo.h:81
ff_wmv2_encode_mb
void ff_wmv2_encode_mb(MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y)
Definition: wmv2enc.c:147
ff_msmpeg4_coded_block_pred
int ff_msmpeg4_coded_block_pred(MpegEncContext *s, int n, uint8_t **coded_block_ptr)
Definition: msmpeg4.c:162
h263.h