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 "libavutil/mem.h"
22 #include "avcodec.h"
23 #include "codec_internal.h"
24 #include "h263.h"
25 #include "mpegvideo.h"
26 #include "mpegvideoenc.h"
27 #include "msmpeg4.h"
28 #include "msmpeg4enc.h"
29 #include "msmpeg4data.h"
30 #include "msmpeg4_vc1_data.h"
31 #include "wmv2.h"
32 
33 #define WMV2_EXTRADATA_SIZE 4
34 
35 typedef struct WMV2EncContext {
36  MSMPEG4EncContext msmpeg4;
37  WMV2Context common;
38  int j_type_bit;
39  int j_type;
40  int abt_flag;
41  int abt_type;
42  int per_mb_abt;
43  int mspel_bit;
44  int cbp_table_index;
45  int top_left_mv_flag;
46  int per_mb_rl_bit;
47 } WMV2EncContext;
48 
49 static int encode_ext_header(WMV2EncContext *w)
50 {
51  MPVEncContext *const s = &w->msmpeg4.m.s;
52  PutBitContext pb;
53  int code;
54 
55  init_put_bits(&pb, s->c.avctx->extradata, WMV2_EXTRADATA_SIZE);
56 
57  put_bits(&pb, 5, s->c.avctx->time_base.den / s->c.avctx->time_base.num); // yes 29.97 -> 29
58  put_bits(&pb, 11, FFMIN(w->msmpeg4.m.bit_rate / 1024, 2047));
59 
60  put_bits(&pb, 1, w->mspel_bit = 1);
61  put_bits(&pb, 1, s->c.loop_filter);
62  put_bits(&pb, 1, w->abt_flag = 1);
63  put_bits(&pb, 1, w->j_type_bit = 1);
64  put_bits(&pb, 1, w->top_left_mv_flag = 0);
65  put_bits(&pb, 1, w->per_mb_rl_bit = 1);
66  put_bits(&pb, 3, code = 1);
67 
68  flush_put_bits(&pb);
69 
70  s->c.slice_height = s->c.mb_height / code;
71 
72  return 0;
73 }
74 
75 static int wmv2_encode_picture_header(MPVMainEncContext *const m)
76 {
77  WMV2EncContext *const w = (WMV2EncContext *) m;
78  MSMPEG4EncContext *const ms = &w->msmpeg4;
79  MPVEncContext *const s = &m->s;
80 
81  put_bits(&s->pb, 1, s->c.pict_type - 1);
82  if (s->c.pict_type == AV_PICTURE_TYPE_I)
83  put_bits(&s->pb, 7, 0);
84  put_bits(&s->pb, 5, s->c.qscale);
85 
86  ms->dc_table_index = 1;
87  ms->mv_table_index = 1; /* only if P-frame */
88  ms->per_mb_rl_table = 0;
89  s->c.mspel = 0;
90  w->per_mb_abt = 0;
91  w->abt_type = 0;
92  w->j_type = 0;
93 
94  av_assert0(s->c.flipflop_rounding);
95 
96  if (s->c.pict_type == AV_PICTURE_TYPE_I) {
97  av_assert0(s->c.no_rounding == 1);
98  if (w->j_type_bit)
99  put_bits(&s->pb, 1, w->j_type);
100 
101  if (w->per_mb_rl_bit)
102  put_bits(&s->pb, 1, ms->per_mb_rl_table);
103 
104  if (!ms->per_mb_rl_table) {
105  ff_msmpeg4_code012(&s->pb, ms->rl_chroma_table_index);
106  ff_msmpeg4_code012(&s->pb, ms->rl_table_index);
107  }
108 
109  put_bits(&s->pb, 1, ms->dc_table_index);
110 
111  s->c.inter_intra_pred = 0;
112  } else {
113  int cbp_index;
114 
115  put_bits(&s->pb, 2, SKIP_TYPE_NONE);
116 
117  ff_msmpeg4_code012(&s->pb, cbp_index = 0);
118  w->cbp_table_index = wmv2_get_cbp_table_index(&s->c, cbp_index);
119 
120  if (w->mspel_bit)
121  put_bits(&s->pb, 1, s->c.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  if (w->per_mb_rl_bit)
130  put_bits(&s->pb, 1, ms->per_mb_rl_table);
131 
132  if (!ms->per_mb_rl_table) {
133  ff_msmpeg4_code012(&s->pb, ms->rl_table_index);
134  ms->rl_chroma_table_index = ms->rl_table_index;
135  }
136  put_bits(&s->pb, 1, ms->dc_table_index);
137  put_bits(&s->pb, 1, ms->mv_table_index);
138 
139  s->c.inter_intra_pred = 0; // (s->c.width * s->c.height < 320 * 240 && m->bit_rate <= II_BITRATE);
140  }
141  s->esc3_level_length = 0;
142  ms->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. */
150 static void wmv2_encode_mb(MPVEncContext *const s, int16_t block[][64],
151  int motion_x, int motion_y)
152 {
153  WMV2EncContext *const w = (WMV2EncContext *) s;
154  int cbp, coded_cbp, i;
155  int pred_x, pred_y;
156  uint8_t *coded_block;
157 
158  ff_msmpeg4_handle_slices(s);
159 
160  if (!s->c.mb_intra) {
161  /* compute cbp */
162  cbp = 0;
163  for (i = 0; i < 6; i++)
164  if (s->c.block_last_index[i] >= 0)
165  cbp |= 1 << (5 - i);
166 
167  put_bits(&s->pb,
168  ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
169  ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
170 
171  s->misc_bits += get_bits_diff(s);
172  /* motion vector */
173  ff_h263_pred_motion(&s->c, 0, 0, &pred_x, &pred_y);
174  ff_msmpeg4_encode_motion(&w->msmpeg4, motion_x - pred_x,
175  motion_y - pred_y);
176  s->mv_bits += get_bits_diff(s);
177  } else {
178  /* compute cbp */
179  cbp = 0;
180  coded_cbp = 0;
181  for (i = 0; i < 6; i++) {
182  int val = (s->c.block_last_index[i] >= 1);
183 
184  cbp |= val << (5 - i);
185  if (i < 4) {
186  /* predict value for close blocks only for luma */
187  int pred = ff_msmpeg4_coded_block_pred(&s->c, i, &coded_block);
188  *coded_block = val;
189  val = val ^ pred;
190  }
191  coded_cbp |= val << (5 - i);
192  }
193 
194  if (s->c.pict_type == AV_PICTURE_TYPE_I)
195  put_bits(&s->pb,
196  ff_msmp4_mb_i_table[coded_cbp][1],
197  ff_msmp4_mb_i_table[coded_cbp][0]);
198  else
199  put_bits(&s->pb,
200  ff_wmv2_inter_table[w->cbp_table_index][cbp][1],
201  ff_wmv2_inter_table[w->cbp_table_index][cbp][0]);
202  put_bits(&s->pb, 1, 0); /* no AC prediction yet */
203  if (s->c.inter_intra_pred) {
204  s->c.h263_aic_dir = 0;
205  put_bits(&s->pb,
206  ff_table_inter_intra[s->c.h263_aic_dir][1],
207  ff_table_inter_intra[s->c.h263_aic_dir][0]);
208  }
209  s->misc_bits += get_bits_diff(s);
210  }
211 
212  for (i = 0; i < 6; i++)
213  ff_msmpeg4_encode_block(s, block[i], i);
214  if (s->c.mb_intra)
215  s->i_tex_bits += get_bits_diff(s);
216  else
217  s->p_tex_bits += get_bits_diff(s);
218 }
219 
220 static av_cold int wmv2_encode_init(AVCodecContext *avctx)
221 {
222  WMV2EncContext *const w = avctx->priv_data;
223  MPVEncContext *const s = &w->msmpeg4.m.s;
224  int ret;
225 
226  w->msmpeg4.m.encode_picture_header = wmv2_encode_picture_header;
227  s->encode_mb = wmv2_encode_mb;
228  s->c.private_ctx = &w->common;
229  ret = ff_mpv_encode_init(avctx);
230  if (ret < 0)
231  return ret;
232 
233  ff_wmv2_common_init(&s->c);
234 
235  avctx->extradata_size = WMV2_EXTRADATA_SIZE;
236  avctx->extradata = av_mallocz(avctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
237  if (!avctx->extradata)
238  return AVERROR(ENOMEM);
239 
240  encode_ext_header(w);
241 
242  return 0;
243 }
244 
245 const FFCodec ff_wmv2_encoder = {
246  .p.name = "wmv2",
247  CODEC_LONG_NAME("Windows Media Video 8"),
248  .p.type = AVMEDIA_TYPE_VIDEO,
249  .p.id = AV_CODEC_ID_WMV2,
250  .p.priv_class = &ff_mpv_enc_class,
251  .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
252  .priv_data_size = sizeof(WMV2EncContext),
253  .init = wmv2_encode_init,
254  FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
255  .close = ff_mpv_encode_end,
256  .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
257  .color_ranges = AVCOL_RANGE_MPEG,
258  CODEC_PIXFMTS(AV_PIX_FMT_YUV420P),
259 };
CODEC_PIXFMTS
#define CODEC_PIXFMTS(...)
Definition: codec_internal.h:386
ff_mpv_enc_class
const AVClass ff_mpv_enc_class
Definition: mpegvideo_enc.c:104
MPVEncContext
Definition: mpegvideoenc.h:45
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: codec_internal.h:42
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
WMV2EncContext::abt_type
int abt_type
Definition: wmv2enc.c:41
mpegvideoenc.h
ff_msmpeg4_handle_slices
void ff_msmpeg4_handle_slices(MPVEncContext *const s)
Definition: msmpeg4enc.c:331
init_put_bits
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:62
WMV2EncContext::msmpeg4
MSMPEG4EncContext msmpeg4
Definition: wmv2enc.c:36
put_bits
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:223
w
uint8_t w
Definition: llviddspenc.c:38
FFCodec
Definition: codec_internal.h:127
mpegvideo.h
WMV2Context
Definition: wmv2.h:33
wmv2_encode_init
static av_cold int wmv2_encode_init(AVCodecContext *avctx)
Definition: wmv2enc.c:220
ff_mpv_encode_picture
int ff_mpv_encode_picture(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pic_arg, int *got_packet)
Definition: mpegvideo_enc.c:1926
WMV2EncContext::top_left_mv_flag
int top_left_mv_flag
Definition: wmv2enc.c:45
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:131
ff_wmv2_inter_table
const uint32_t(*const [WMV2_INTER_CBP_TABLE_COUNT] ff_wmv2_inter_table)[2]
Definition: msmpeg4data.c:1129
ff_h263_pred_motion
int16_t * ff_h263_pred_motion(MpegEncContext *s, int block, int dir, int *px, int *py)
Definition: h263.c:179
ff_wmv2_encoder
const FFCodec ff_wmv2_encoder
Definition: wmv2enc.c:245
val
static double val(void *priv, double ch)
Definition: aeval.c:77
FF_CODEC_ENCODE_CB
#define FF_CODEC_ENCODE_CB(func)
Definition: codec_internal.h:353
WMV2EncContext
Definition: wmv2enc.c:35
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:47
msmpeg4data.h
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:515
s
#define s(width, name)
Definition: cbs_vp9.c:198
WMV2EncContext::j_type_bit
int j_type_bit
Definition: wmv2enc.c:38
MSMPEG4EncContext::esc3_run_length
int esc3_run_length
Definition: msmpeg4enc.h:38
AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE
#define AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE
This encoder can reorder user opaque values from input AVFrames and return them with corresponding ou...
Definition: codec.h:144
AV_CODEC_ID_WMV2
@ AV_CODEC_ID_WMV2
Definition: codec_id.h:70
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:40
SKIP_TYPE_NONE
#define SKIP_TYPE_NONE
Definition: wmv2.h:27
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:73
WMV2EncContext::per_mb_abt
int per_mb_abt
Definition: wmv2enc.c:42
PutBitContext
Definition: put_bits.h:50
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:326
WMV2EncContext::per_mb_rl_bit
int per_mb_rl_bit
Definition: wmv2enc.c:46
MSMPEG4EncContext::per_mb_rl_table
int per_mb_rl_table
Definition: msmpeg4enc.h:37
MSMPEG4EncContext::dc_table_index
int dc_table_index
Definition: msmpeg4enc.h:35
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:279
ff_msmp4_mb_i_table
const uint16_t ff_msmp4_mb_i_table[64][2]
Definition: msmpeg4_vc1_data.c:63
ff_mpv_encode_end
av_cold int ff_mpv_encode_end(AVCodecContext *avctx)
Definition: mpegvideo_enc.c:1104
MPVMainEncContext
Definition: mpegvideoenc.h:172
wmv2.h
MSMPEG4EncContext
Definition: msmpeg4enc.h:29
wmv2_encode_mb
static void wmv2_encode_mb(MPVEncContext *const s, int16_t block[][64], int motion_x, int motion_y)
Definition: wmv2enc.c:150
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts.c:368
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
codec_internal.h
WMV2EncContext::cbp_table_index
int cbp_table_index
Definition: wmv2enc.c:44
WMV2_EXTRADATA_SIZE
#define WMV2_EXTRADATA_SIZE
Definition: wmv2enc.c:33
ff_msmpeg4_encode_motion
void ff_msmpeg4_encode_motion(MSMPEG4EncContext *const ms, int mx, int my)
Definition: msmpeg4enc.c:305
get_bits_diff
static int get_bits_diff(MPVEncContext *s)
Definition: mpegvideoenc.h:382
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
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
Out-of-band global headers that may be used by some codecs.
Definition: avcodec.h:514
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
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:256
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:179
AVCOL_RANGE_MPEG
@ AVCOL_RANGE_MPEG
Narrow or limited range content.
Definition: pixfmt.h:733
WMV2EncContext::common
WMV2Context common
Definition: wmv2enc.c:37
avcodec.h
MSMPEG4EncContext::rl_table_index
int rl_table_index
Definition: msmpeg4enc.h:33
msmpeg4.h
WMV2EncContext::j_type
int j_type
Definition: wmv2enc.c:39
ret
ret
Definition: filter_design.txt:187
pred
static const float pred[4]
Definition: siprdata.h:259
AV_INPUT_BUFFER_PADDING_SIZE
#define AV_INPUT_BUFFER_PADDING_SIZE
Definition: defs.h:40
AVCodecContext
main external API structure.
Definition: avcodec.h:431
ff_msmpeg4_code012
void ff_msmpeg4_code012(PutBitContext *pb, int n)
Definition: msmpeg4enc.c:81
wmv2_encode_picture_header
static int wmv2_encode_picture_header(MPVMainEncContext *const m)
Definition: wmv2enc.c:75
ff_table_inter_intra
const uint8_t ff_table_inter_intra[4][2]
Definition: msmpeg4data.c:1017
MSMPEG4EncContext::mv_table_index
int mv_table_index
Definition: msmpeg4enc.h:32
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
msmpeg4enc.h
mem.h
msmpeg4_vc1_data.h
ff_mpv_encode_init
av_cold int ff_mpv_encode_init(AVCodecContext *avctx)
Definition: mpegvideo_enc.c:544
flush_put_bits
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:143
ff_msmpeg4_encode_block
void ff_msmpeg4_encode_block(MPVEncContext *const s, int16_t *block, int n)
Definition: msmpeg4enc.c:554
WMV2EncContext::abt_flag
int abt_flag
Definition: wmv2enc.c:40
encode_ext_header
static int encode_ext_header(WMV2EncContext *w)
Definition: wmv2enc.c:49
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:458
block
The exact code depends on how similar the blocks are and how related they are to the block
Definition: filter_design.txt:207
WMV2EncContext::mspel_bit
int mspel_bit
Definition: wmv2enc.c:43
MPVMainEncContext::s
MPVEncContext s
The main slicecontext.
Definition: mpegvideoenc.h:173
ff_wmv2_common_init
av_cold void ff_wmv2_common_init(MpegEncContext *s)
Definition: wmv2.c:28
MSMPEG4EncContext::rl_chroma_table_index
int rl_chroma_table_index
Definition: msmpeg4enc.h:34
ff_msmpeg4_coded_block_pred
int ff_msmpeg4_coded_block_pred(MpegEncContext *s, int n, uint8_t **coded_block_ptr)
Definition: msmpeg4.c:156
h263.h
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