FFmpeg
speedhqenc.c
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1 /*
2  * SpeedHQ encoder
3  * Copyright (c) 2000, 2001 Fabrice Bellard
4  * Copyright (c) 2003 Alex Beregszaszi
5  * Copyright (c) 2003-2004 Michael Niedermayer
6  * Copyright (c) 2020 FFmpeg
7  *
8  * This file is part of FFmpeg.
9  *
10  * FFmpeg is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * FFmpeg is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with FFmpeg; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
25 /**
26  * @file
27  * SpeedHQ encoder.
28  */
29 
30 #include "libavutil/pixdesc.h"
31 #include "libavutil/thread.h"
32 
33 #include "avcodec.h"
34 #include "mpeg12.h"
35 #include "mpegvideo.h"
36 #include "speedhqenc.h"
37 
38 extern RLTable ff_rl_speedhq;
40 
41 static uint16_t mpeg12_vlc_dc_lum_code_reversed[12];
43 
44 /* simple include everything table for dc, first byte is bits
45  * number next 3 are code */
46 static uint32_t speedhq_lum_dc_uni[512];
47 static uint32_t speedhq_chr_dc_uni[512];
48 
49 static uint8_t uni_speedhq_ac_vlc_len[64 * 64 * 2];
50 
51 static uint32_t reverse(uint32_t num, int bits)
52 {
53  return bitswap_32(num) >> (32 - bits);
54 }
55 
56 static void reverse_code(const uint16_t *code, const uint8_t *bits,
57  uint16_t *reversed_code, int num_entries)
58 {
59  for (int i = 0; i < num_entries; i++)
60  reversed_code[i] = reverse(code[i], bits[i]);
61 }
62 
64 {
65  /* Exactly the same as MPEG-2, except little-endian. */
69  12);
73  12);
74 
76 
77  /* build unified dc encoding tables */
78  for (int i = -255; i < 256; i++) {
79  int adiff, index;
80  int bits, code;
81  int diff = i;
82 
83  adiff = FFABS(diff);
84  if (diff < 0)
85  diff--;
86  index = av_log2(2 * adiff);
87 
91  speedhq_lum_dc_uni[i + 255] = bits + (code << 8);
92 
96  speedhq_chr_dc_uni[i + 255] = bits + (code << 8);
97  }
98 
100 }
101 
103 {
104  static AVOnce init_static_once = AV_ONCE_INIT;
105 
106  av_assert0(s->slice_context_count == 1);
107 
108  if (s->width > 65500 || s->height > 65500) {
109  av_log(s, AV_LOG_ERROR, "SpeedHQ does not support resolutions above 65500x65500\n");
110  return AVERROR(EINVAL);
111  }
112 
113  s->min_qcoeff = -2048;
114  s->max_qcoeff = 2047;
115 
116  ff_thread_once(&init_static_once, speedhq_init_static_data);
117 
118  s->intra_ac_vlc_length =
119  s->intra_ac_vlc_last_length =
120  s->intra_chroma_ac_vlc_length =
121  s->intra_chroma_ac_vlc_last_length = uni_speedhq_ac_vlc_len;
122 
123  switch (s->avctx->pix_fmt) {
124  case AV_PIX_FMT_YUV420P:
125  s->avctx->codec_tag = MKTAG('S','H','Q','0');
126  break;
127  case AV_PIX_FMT_YUV422P:
128  s->avctx->codec_tag = MKTAG('S','H','Q','2');
129  break;
130  case AV_PIX_FMT_YUV444P:
131  s->avctx->codec_tag = MKTAG('S','H','Q','4');
132  break;
133  default:
134  av_assert0(0);
135  }
136 
137  return 0;
138 }
139 
141 {
142  put_bits_le(&s->pb, 8, 100 - s->qscale * 2); /* FIXME why doubled */
143  put_bits_le(&s->pb, 24, 4); /* no second field */
144 
145  /* length of first slice, will be filled out later */
146  s->slice_start = 4;
147  put_bits_le(&s->pb, 24, 0);
148 }
149 
151 {
152  int slice_len;
153 
154  flush_put_bits_le(&s->pb);
155  slice_len = s->pb.buf_ptr - (s->pb.buf + s->slice_start);
156  AV_WL24(s->pb.buf + s->slice_start, slice_len);
157 
158  /* length of next slice, will be filled out later */
159  s->slice_start = s->pb.buf_ptr - s->pb.buf;
160  put_bits_le(&s->pb, 24, 0);
161 }
162 
163 static inline void encode_dc(PutBitContext *pb, int diff, int component)
164 {
165  unsigned int diff_u = diff + 255;
166  if (diff_u >= 511) {
167  int index;
168 
169  if (diff < 0) {
170  index = av_log2_16bit(-2 * diff);
171  diff--;
172  } else {
173  index = av_log2_16bit(2 * diff);
174  }
175  if (component == 0)
176  put_bits_le(pb,
180  else
181  put_bits_le(pb,
185  } else {
186  if (component == 0)
187  put_bits_le(pb,
188  speedhq_lum_dc_uni[diff + 255] & 0xFF,
189  speedhq_lum_dc_uni[diff + 255] >> 8);
190  else
191  put_bits_le(pb,
192  speedhq_chr_dc_uni[diff + 255] & 0xFF,
193  speedhq_chr_dc_uni[diff + 255] >> 8);
194  }
195 }
196 
197 static void encode_block(MpegEncContext *s, int16_t *block, int n)
198 {
199  int alevel, level, last_non_zero, dc, i, j, run, last_index, sign;
200  int code;
201  int component, val;
202 
203  /* DC coef */
204  component = (n <= 3 ? 0 : (n&1) + 1);
205  dc = block[0]; /* overflow is impossible */
206  val = s->last_dc[component] - dc; /* opposite of most codecs */
207  encode_dc(&s->pb, val, component);
208  s->last_dc[component] = dc;
209 
210  /* now quantify & encode AC coefs */
211  last_non_zero = 0;
212  last_index = s->block_last_index[n];
213 
214  for (i = 1; i <= last_index; i++) {
215  j = s->intra_scantable.permutated[i];
216  level = block[j];
217 
218  /* encode using VLC */
219  if (level != 0) {
220  run = i - last_non_zero - 1;
221 
222  alevel = level;
223  MASK_ABS(sign, alevel);
224  sign &= 1;
225 
226  if (alevel <= ff_rl_speedhq.max_level[0][run]) {
227  code = ff_rl_speedhq.index_run[0][run] + alevel - 1;
228  /* store the VLC & sign at once */
229  put_bits_le(&s->pb, ff_rl_speedhq.table_vlc[code][1] + 1,
231  } else {
232  /* escape seems to be pretty rare <5% so I do not optimize it */
234  /* escape: only clip in this case */
235  put_bits_le(&s->pb, 6, run);
236  put_bits_le(&s->pb, 12, level + 2048);
237  }
238  last_non_zero = i;
239  }
240  }
241  /* end of block */
243 }
244 
246 {
247  int i;
248  for(i=0;i<6;i++) {
249  encode_block(s, block[i], i);
250  }
251  if (s->chroma_format == CHROMA_444) {
252  encode_block(s, block[8], 8);
253  encode_block(s, block[9], 9);
254 
255  encode_block(s, block[6], 6);
256  encode_block(s, block[7], 7);
257 
258  encode_block(s, block[10], 10);
259  encode_block(s, block[11], 11);
260  } else if (s->chroma_format == CHROMA_422) {
261  encode_block(s, block[6], 6);
262  encode_block(s, block[7], 7);
263  }
264 
265  s->i_tex_bits += get_bits_diff(s);
266 }
267 
268 static int ff_speedhq_mb_rows_in_slice(int slice_num, int mb_height)
269 {
270  return mb_height / 4 + (slice_num < (mb_height % 4));
271 }
272 
273 int ff_speedhq_mb_y_order_to_mb(int mb_y_order, int mb_height, int *first_in_slice)
274 {
275  int slice_num = 0;
276  while (mb_y_order >= ff_speedhq_mb_rows_in_slice(slice_num, mb_height)) {
277  mb_y_order -= ff_speedhq_mb_rows_in_slice(slice_num, mb_height);
278  slice_num++;
279  }
280  *first_in_slice = (mb_y_order == 0);
281  return mb_y_order * 4 + slice_num;
282 }
283 
284 #if CONFIG_SPEEDHQ_ENCODER
285 static const AVClass speedhq_class = {
286  .class_name = "speedhq encoder",
287  .item_name = av_default_item_name,
288  .option = ff_mpv_generic_options,
289  .version = LIBAVUTIL_VERSION_INT,
290 };
291 
293  .name = "speedhq",
294  .long_name = NULL_IF_CONFIG_SMALL("NewTek SpeedHQ"),
295  .type = AVMEDIA_TYPE_VIDEO,
296  .id = AV_CODEC_ID_SPEEDHQ,
297  .priv_data_size = sizeof(MpegEncContext),
299  .encode2 = ff_mpv_encode_picture,
300  .close = ff_mpv_encode_end,
301  .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
302  .pix_fmts = (const enum AVPixelFormat[]) {
305  },
306  .priv_class = &speedhq_class,
307 };
308 #endif
ff_speedhq_end_slice
void ff_speedhq_end_slice(MpegEncContext *s)
Definition: speedhqenc.c:150
AVCodec
AVCodec.
Definition: codec.h:197
ff_speedhq_encode_init
av_cold int ff_speedhq_encode_init(MpegEncContext *s)
Definition: speedhqenc.c:102
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
level
uint8_t level
Definition: svq3.c:204
uni_speedhq_ac_vlc_len
static uint8_t uni_speedhq_ac_vlc_len[64 *64 *2]
Definition: speedhqenc.c:49
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
bitswap_32
static av_always_inline uint32_t bitswap_32(uint32_t x)
Definition: mathops.h:243
RLTable::index_run
uint8_t * index_run[2]
encoding only
Definition: rl.h:45
ff_speedhq_encode_picture_header
void ff_speedhq_encode_picture_header(MpegEncContext *s)
Definition: speedhqenc.c:140
thread.h
MKTAG
#define MKTAG(a, b, c, d)
Definition: common.h:478
MAX_RUN
#define MAX_RUN
Definition: rl.h:35
av_mod_uintp2
#define av_mod_uintp2
Definition: common.h:149
av_log2_16bit
int av_log2_16bit(unsigned v)
Definition: intmath.c:31
pixdesc.h
index
fg index
Definition: ffmpeg_filter.c:170
MASK_ABS
#define MASK_ABS(mask, level)
Definition: mathops.h:155
speedhqenc.h
mpegvideo.h
ff_mpeg12_vlc_dc_chroma_bits
const unsigned char ff_mpeg12_vlc_dc_chroma_bits[12]
Definition: mpeg12data.c:62
ff_mpeg1_init_uni_ac_vlc
void ff_mpeg1_init_uni_ac_vlc(const RLTable *rl, uint8_t *uni_ac_vlc_len)
Definition: mpeg12enc.c:68
encode_block
static void encode_block(MpegEncContext *s, int16_t *block, int n)
Definition: speedhqenc.c:197
ff_mpeg12_vlc_dc_lum_bits
const unsigned char ff_mpeg12_vlc_dc_lum_bits[12]
Definition: mpeg12data.c:55
speedhq_lum_dc_uni
static uint32_t speedhq_lum_dc_uni[512]
Definition: speedhqenc.c:46
RLTable
RLTable.
Definition: rl.h:39
val
static double val(void *priv, double ch)
Definition: aeval.c:76
reverse
static uint32_t reverse(uint32_t num, int bits)
Definition: speedhqenc.c:51
mpeg12.h
ff_thread_once
static int ff_thread_once(char *control, void(*routine)(void))
Definition: thread.h:175
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
av_cold
#define av_cold
Definition: attributes.h:90
ff_rl_speedhq
RLTable ff_rl_speedhq
Definition: speedhq.c:137
RLTable::max_level
int8_t * max_level[2]
encoding & decoding
Definition: rl.h:46
s
#define s(width, name)
Definition: cbs_vp9.c:257
CHROMA_422
#define CHROMA_422
Definition: mpegvideo.h:489
ff_mpv_encode_init
int ff_mpv_encode_init(AVCodecContext *avctx)
Definition: mpegvideo_enc.c:302
bits
uint8_t bits
Definition: vp3data.h:141
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:1786
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:303
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:51
ff_rl_init
av_cold void ff_rl_init(RLTable *rl, uint8_t static_store[2][2 *MAX_RUN+MAX_LEVEL+3])
Definition: rl.c:28
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
AV_ONCE_INIT
#define AV_ONCE_INIT
Definition: thread.h:173
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
run
uint8_t run
Definition: svq3.c:203
RLTable::table_vlc
const uint16_t(* table_vlc)[2]
Definition: rl.h:42
AV_WL24
#define AV_WL24(p, d)
Definition: intreadwrite.h:464
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
AV_CODEC_ID_SPEEDHQ
@ AV_CODEC_ID_SPEEDHQ
Definition: codec_id.h:274
flush_put_bits_le
static void flush_put_bits_le(PutBitContext *s)
Definition: put_bits.h:168
ff_speedhq_encoder
AVCodec ff_speedhq_encoder
AVOnce
#define AVOnce
Definition: thread.h:172
MAX_LEVEL
#define MAX_LEVEL
Definition: rl.h:36
dc
Tag MUST be and< 10hcoeff half pel interpolation filter coefficients, hcoeff[0] are the 2 middle coefficients[1] are the next outer ones and so on, resulting in a filter like:...eff[2], hcoeff[1], hcoeff[0], hcoeff[0], hcoeff[1], hcoeff[2] ... the sign of the coefficients is not explicitly stored but alternates after each coeff and coeff[0] is positive, so ...,+,-,+,-,+,+,-,+,-,+,... hcoeff[0] is not explicitly stored but found by subtracting the sum of all stored coefficients with signs from 32 hcoeff[0]=32 - hcoeff[1] - hcoeff[2] - ... a good choice for hcoeff and htaps is htaps=6 hcoeff={40,-10, 2} an alternative which requires more computations at both encoder and decoder side and may or may not be better is htaps=8 hcoeff={42,-14, 6,-2}ref_frames minimum of the number of available reference frames and max_ref_frames for example the first frame after a key frame always has ref_frames=1spatial_decomposition_type wavelet type 0 is a 9/7 symmetric compact integer wavelet 1 is a 5/3 symmetric compact integer wavelet others are reserved stored as delta from last, last is reset to 0 if always_reset||keyframeqlog quality(logarithmic quantizer scale) stored as delta from last, last is reset to 0 if always_reset||keyframemv_scale stored as delta from last, last is reset to 0 if always_reset||keyframe FIXME check that everything works fine if this changes between framesqbias dequantization bias stored as delta from last, last is reset to 0 if always_reset||keyframeblock_max_depth maximum depth of the block tree stored as delta from last, last is reset to 0 if always_reset||keyframequant_table quantization tableHighlevel bitstream structure:==============================--------------------------------------------|Header|--------------------------------------------|------------------------------------|||Block0||||split?||||yes no||||......... intra?||||:Block01 :yes no||||:Block02 :....... ..........||||:Block03 ::y DC ::ref index:||||:Block04 ::cb DC ::motion x :||||......... :cr DC ::motion y :||||....... ..........|||------------------------------------||------------------------------------|||Block1|||...|--------------------------------------------|------------ ------------ ------------|||Y subbands||Cb subbands||Cr subbands||||--- ---||--- ---||--- ---|||||LL0||HL0||||LL0||HL0||||LL0||HL0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||LH0||HH0||||LH0||HH0||||LH0||HH0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HL1||LH1||||HL1||LH1||||HL1||LH1|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HH1||HL2||||HH1||HL2||||HH1||HL2|||||...||...||...|||------------ ------------ ------------|--------------------------------------------Decoding process:=================------------|||Subbands|------------||||------------|Intra DC||||LL0 subband prediction ------------|\ Dequantization ------------------- \||Reference frames|\ IDWT|------- -------|Motion \|||Frame 0||Frame 1||Compensation . OBMC v -------|------- -------|--------------. \------> Frame n output Frame Frame<----------------------------------/|...|------------------- Range Coder:============Binary Range Coder:------------------- The implemented range coder is an adapted version based upon "Range encoding: an algorithm for removing redundancy from a digitised message." by G. N. N. Martin. The symbols encoded by the Snow range coder are bits(0|1). The associated probabilities are not fix but change depending on the symbol mix seen so far. bit seen|new state ---------+----------------------------------------------- 0|256 - state_transition_table[256 - old_state];1|state_transition_table[old_state];state_transition_table={ 0, 0, 0, 0, 0, 0, 0, 0, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 190, 191, 192, 194, 194, 195, 196, 197, 198, 199, 200, 201, 202, 202, 204, 205, 206, 207, 208, 209, 209, 210, 211, 212, 213, 215, 215, 216, 217, 218, 219, 220, 220, 222, 223, 224, 225, 226, 227, 227, 229, 229, 230, 231, 232, 234, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 248, 0, 0, 0, 0, 0, 0, 0};FIXME Range Coding of integers:------------------------- FIXME Neighboring Blocks:===================left and top are set to the respective blocks unless they are outside of the image in which case they are set to the Null block top-left is set to the top left block unless it is outside of the image in which case it is set to the left block if this block has no larger parent block or it is at the left side of its parent block and the top right block is not outside of the image then the top right block is used for top-right else the top-left block is used Null block y, cb, cr are 128 level, ref, mx and my are 0 Motion Vector Prediction:=========================1. the motion vectors of all the neighboring blocks are scaled to compensate for the difference of reference frames scaled_mv=(mv *(256 *(current_reference+1)/(mv.reference+1))+128)> the median of the scaled top and top right vectors is used as motion vector prediction the used motion vector is the sum of the predictor and(mvx_diff, mvy_diff) *mv_scale Intra DC Prediction block[y][x] dc[1]
Definition: snow.txt:400
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
ff_speedhq_mb_rows_in_slice
static int ff_speedhq_mb_rows_in_slice(int slice_num, int mb_height)
Definition: speedhqenc.c:268
ff_mpv_generic_options
const AVOption ff_mpv_generic_options[]
Definition: mpegvideo_enc.c:87
mpeg12_vlc_dc_chroma_code_reversed
static uint16_t mpeg12_vlc_dc_chroma_code_reversed[12]
Definition: speedhqenc.c:42
encode_dc
static void encode_dc(PutBitContext *pb, int diff, int component)
Definition: speedhqenc.c:163
speedhq_static_rl_table_store
static uint8_t speedhq_static_rl_table_store[2][2 *MAX_RUN+MAX_LEVEL+3]
Definition: speedhqenc.c:39
CHROMA_444
#define CHROMA_444
Definition: mpegvideo.h:490
ff_speedhq_encode_mb
void ff_speedhq_encode_mb(MpegEncContext *s, int16_t block[12][64])
Definition: speedhqenc.c:245
i
int i
Definition: input.c:407
speedhq_chr_dc_uni
static uint32_t speedhq_chr_dc_uni[512]
Definition: speedhqenc.c:47
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
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
reverse_code
static void reverse_code(const uint16_t *code, const uint8_t *bits, uint16_t *reversed_code, int num_entries)
Definition: speedhqenc.c:56
ff_mpv_encode_end
int ff_mpv_encode_end(AVCodecContext *avctx)
Definition: mpegvideo_enc.c:1023
uint8_t
uint8_t
Definition: audio_convert.c:194
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:204
speedhq_init_static_data
static av_cold void speedhq_init_static_data(void)
Definition: speedhqenc.c:63
avcodec.h
ff_mpeg12_vlc_dc_chroma_code
const uint16_t ff_mpeg12_vlc_dc_chroma_code[12]
Definition: mpeg12data.c:59
get_bits_diff
static int get_bits_diff(MpegEncContext *s)
Definition: mpegvideo.h:777
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_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AV_PIX_FMT_YUV444P
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
ff_speedhq_mb_y_order_to_mb
int ff_speedhq_mb_y_order_to_mb(int mb_y_order, int mb_height, int *first_in_slice)
Definition: speedhqenc.c:273
AV_PIX_FMT_YUV422P
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
diff
static av_always_inline int diff(const uint32_t a, const uint32_t b)
Definition: vf_palettegen.c:136
mpeg12_vlc_dc_lum_code_reversed
static uint16_t mpeg12_vlc_dc_lum_code_reversed[12]
Definition: speedhqenc.c:41
ff_mpeg12_vlc_dc_lum_code
const uint16_t ff_mpeg12_vlc_dc_lum_code[12]
Definition: mpeg12data.c:52
block
The exact code depends on how similar the blocks are and how related they are to the block
Definition: filter_design.txt:207
put_bits_le
static void put_bits_le(PutBitContext *s, int n, BitBuf value)
Definition: put_bits.h:262
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
MpegEncContext
MpegEncContext.
Definition: mpegvideo.h:81
av_log2
int av_log2(unsigned v)
Definition: intmath.c:26