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 "config_components.h"
31 
32 #include "libavutil/thread.h"
33 
34 #include "avcodec.h"
35 #include "codec_internal.h"
36 #include "mpeg12data.h"
37 #include "mpeg12enc.h"
38 #include "mpegvideo.h"
39 #include "mpegvideoenc.h"
40 #include "speedhqenc.h"
41 
42 extern RLTable ff_rl_speedhq;
43 static uint8_t speedhq_static_rl_table_store[2][2*MAX_RUN + MAX_LEVEL + 3];
44 
45 /* Exactly the same as MPEG-2, except little-endian. */
46 static const uint16_t mpeg12_vlc_dc_lum_code_reversed[12] = {
47  0x1, 0x0, 0x2, 0x5, 0x3, 0x7, 0xF, 0x1F, 0x3F, 0x7F, 0xFF, 0x1FF
48 };
49 static const uint16_t mpeg12_vlc_dc_chroma_code_reversed[12] = {
50  0x0, 0x2, 0x1, 0x3, 0x7, 0xF, 0x1F, 0x3F, 0x7F, 0xFF, 0x1FF, 0x3FF
51 };
52 
53 /* simple include everything table for dc, first byte is bits
54  * number next 3 are code */
55 static uint32_t speedhq_lum_dc_uni[512];
56 static uint32_t speedhq_chr_dc_uni[512];
57 
58 static uint8_t uni_speedhq_ac_vlc_len[64 * 64 * 2];
59 
60 typedef struct SpeedHQEncContext {
62 
65 
67 {
69 
70  /* build unified dc encoding tables */
71  for (int i = -255; i < 256; i++) {
72  int adiff, index;
73  int bits, code;
74  int diff = i;
75 
76  adiff = FFABS(diff);
77  if (diff < 0)
78  diff--;
79  index = av_log2(2 * adiff);
80 
84  speedhq_lum_dc_uni[i + 255] = bits + (code << 8);
85 
89  speedhq_chr_dc_uni[i + 255] = bits + (code << 8);
90  }
91 
93 }
94 
96 {
97  static AVOnce init_static_once = AV_ONCE_INIT;
98 
99  if (s->width > 65500 || s->height > 65500) {
100  av_log(s, AV_LOG_ERROR, "SpeedHQ does not support resolutions above 65500x65500\n");
101  return AVERROR(EINVAL);
102  }
103 
104  s->min_qcoeff = -2048;
105  s->max_qcoeff = 2047;
106 
107  ff_thread_once(&init_static_once, speedhq_init_static_data);
108 
109  s->intra_ac_vlc_length =
110  s->intra_ac_vlc_last_length =
111  s->intra_chroma_ac_vlc_length =
112  s->intra_chroma_ac_vlc_last_length = uni_speedhq_ac_vlc_len;
113 
114  switch (s->avctx->pix_fmt) {
115  case AV_PIX_FMT_YUV420P:
116  s->avctx->codec_tag = MKTAG('S','H','Q','0');
117  break;
118  case AV_PIX_FMT_YUV422P:
119  s->avctx->codec_tag = MKTAG('S','H','Q','2');
120  break;
121  case AV_PIX_FMT_YUV444P:
122  s->avctx->codec_tag = MKTAG('S','H','Q','4');
123  break;
124  default:
125  av_assert0(0);
126  }
127 
128  return 0;
129 }
130 
132 {
134 
135  put_bits_le(&s->pb, 8, 100 - s->qscale * 2); /* FIXME why doubled */
136  put_bits_le(&s->pb, 24, 4); /* no second field */
137 
138  ctx->slice_start = 4;
139  /* length of first slice, will be filled out later */
140  put_bits_le(&s->pb, 24, 0);
141 }
142 
144 {
146  int slice_len;
147 
148  flush_put_bits_le(&s->pb);
149  slice_len = put_bytes_output(&s->pb) - ctx->slice_start;
150  AV_WL24(s->pb.buf + ctx->slice_start, slice_len);
151 
152  /* length of next slice, will be filled out later */
153  ctx->slice_start = put_bytes_output(&s->pb);
154  put_bits_le(&s->pb, 24, 0);
155 }
156 
157 static inline void encode_dc(PutBitContext *pb, int diff, int component)
158 {
159  unsigned int diff_u = diff + 255;
160  if (diff_u >= 511) {
161  int index;
162 
163  if (diff < 0) {
164  index = av_log2_16bit(-2 * diff);
165  diff--;
166  } else {
167  index = av_log2_16bit(2 * diff);
168  }
169  if (component == 0)
170  put_bits_le(pb,
174  else
175  put_bits_le(pb,
179  } else {
180  if (component == 0)
181  put_bits_le(pb,
182  speedhq_lum_dc_uni[diff + 255] & 0xFF,
183  speedhq_lum_dc_uni[diff + 255] >> 8);
184  else
185  put_bits_le(pb,
186  speedhq_chr_dc_uni[diff + 255] & 0xFF,
187  speedhq_chr_dc_uni[diff + 255] >> 8);
188  }
189 }
190 
191 static void encode_block(MpegEncContext *s, int16_t *block, int n)
192 {
193  int alevel, level, last_non_zero, dc, i, j, run, last_index, sign;
194  int code;
195  int component, val;
196 
197  /* DC coef */
198  component = (n <= 3 ? 0 : (n&1) + 1);
199  dc = block[0]; /* overflow is impossible */
200  val = s->last_dc[component] - dc; /* opposite of most codecs */
201  encode_dc(&s->pb, val, component);
202  s->last_dc[component] = dc;
203 
204  /* now quantify & encode AC coefs */
205  last_non_zero = 0;
206  last_index = s->block_last_index[n];
207 
208  for (i = 1; i <= last_index; i++) {
209  j = s->intra_scantable.permutated[i];
210  level = block[j];
211 
212  /* encode using VLC */
213  if (level != 0) {
214  run = i - last_non_zero - 1;
215 
216  alevel = level;
217  MASK_ABS(sign, alevel);
218  sign &= 1;
219 
220  if (alevel <= ff_rl_speedhq.max_level[0][run]) {
221  code = ff_rl_speedhq.index_run[0][run] + alevel - 1;
222  /* store the VLC & sign at once */
223  put_bits_le(&s->pb, ff_rl_speedhq.table_vlc[code][1] + 1,
225  } else {
226  /* escape seems to be pretty rare <5% so I do not optimize it;
227  * the values correspond to ff_rl_speedhq.table_vlc[121] */
228  put_bits_le(&s->pb, 6, 32);
229  /* escape: only clip in this case */
230  put_bits_le(&s->pb, 6, run);
231  put_bits_le(&s->pb, 12, level + 2048);
232  }
233  last_non_zero = i;
234  }
235  }
236  /* end of block; the values correspond to ff_rl_speedhq.table_vlc[122] */
237  put_bits_le(&s->pb, 4, 6);
238 }
239 
241 {
242  int i;
243  for(i=0;i<6;i++) {
244  encode_block(s, block[i], i);
245  }
246  if (s->chroma_format == CHROMA_444) {
247  encode_block(s, block[8], 8);
248  encode_block(s, block[9], 9);
249 
250  encode_block(s, block[6], 6);
251  encode_block(s, block[7], 7);
252 
253  encode_block(s, block[10], 10);
254  encode_block(s, block[11], 11);
255  } else if (s->chroma_format == CHROMA_422) {
256  encode_block(s, block[6], 6);
257  encode_block(s, block[7], 7);
258  }
259 
260  s->i_tex_bits += get_bits_diff(s);
261 }
262 
263 static int ff_speedhq_mb_rows_in_slice(int slice_num, int mb_height)
264 {
265  return mb_height / 4 + (slice_num < (mb_height % 4));
266 }
267 
268 int ff_speedhq_mb_y_order_to_mb(int mb_y_order, int mb_height, int *first_in_slice)
269 {
270  int slice_num = 0;
271  while (mb_y_order >= ff_speedhq_mb_rows_in_slice(slice_num, mb_height)) {
272  mb_y_order -= ff_speedhq_mb_rows_in_slice(slice_num, mb_height);
273  slice_num++;
274  }
275  *first_in_slice = (mb_y_order == 0);
276  return mb_y_order * 4 + slice_num;
277 }
278 
279 #if CONFIG_SPEEDHQ_ENCODER
280 const FFCodec ff_speedhq_encoder = {
281  .p.name = "speedhq",
282  .p.long_name = NULL_IF_CONFIG_SMALL("NewTek SpeedHQ"),
283  .p.type = AVMEDIA_TYPE_VIDEO,
284  .p.id = AV_CODEC_ID_SPEEDHQ,
285  .p.priv_class = &ff_mpv_enc_class,
286  .priv_data_size = sizeof(SpeedHQEncContext),
289  .close = ff_mpv_encode_end,
290  .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
291  .p.pix_fmts = (const enum AVPixelFormat[]) {
294  },
295 };
296 #endif
ff_speedhq_end_slice
void ff_speedhq_end_slice(MpegEncContext *s)
Definition: speedhqenc.c:143
ff_speedhq_encode_init
av_cold int ff_speedhq_encode_init(MpegEncContext *s)
Definition: speedhqenc.c:95
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
ff_mpv_enc_class
const AVClass ff_mpv_enc_class
Definition: mpegvideo_enc.c:101
level
uint8_t level
Definition: svq3.c:206
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:41
uni_speedhq_ac_vlc_len
static uint8_t uni_speedhq_ac_vlc_len[64 *64 *2]
Definition: speedhqenc.c:58
get_bits_diff
static int get_bits_diff(MpegEncContext *s)
Definition: mpegvideoenc.h:139
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
put_bytes_output
static int put_bytes_output(const PutBitContext *s)
Definition: put_bits.h:89
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:131
thread.h
mpegvideoenc.h
MAX_RUN
#define MAX_RUN
Definition: rl.h:35
av_mod_uintp2
#define av_mod_uintp2
Definition: common.h:122
av_log2_16bit
int av_log2_16bit(unsigned v)
Definition: intmath.c:31
FFCodec
Definition: codec_internal.h:118
MASK_ABS
#define MASK_ABS(mask, level)
Definition: mathops.h:157
speedhqenc.h
mpegvideo.h
ff_speedhq_encoder
const FFCodec ff_speedhq_encoder
ff_mpeg12_vlc_dc_chroma_bits
const unsigned char ff_mpeg12_vlc_dc_chroma_bits[12]
Definition: mpeg12data.c:62
encode_block
static void encode_block(MpegEncContext *s, int16_t *block, int n)
Definition: speedhqenc.c:191
ff_mpeg12_vlc_dc_lum_bits
const unsigned char ff_mpeg12_vlc_dc_lum_bits[12]
Definition: mpeg12data.c:55
init
static int init
Definition: av_tx.c:47
ff_mpv_encode_picture
int ff_mpv_encode_picture(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pic_arg, int *got_packet)
Definition: mpegvideo_enc.c:1671
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:122
mpeg12enc.h
speedhq_lum_dc_uni
static uint32_t speedhq_lum_dc_uni[512]
Definition: speedhqenc.c:55
SpeedHQEncContext
Definition: speedhqenc.c:60
RLTable
RLTable.
Definition: rl.h:39
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:269
mpeg12_vlc_dc_chroma_code_reversed
static const uint16_t mpeg12_vlc_dc_chroma_code_reversed[12]
Definition: speedhqenc.c:49
SpeedHQEncContext::slice_start
int slice_start
Definition: speedhqenc.c:63
ff_thread_once
static int ff_thread_once(char *control, void(*routine)(void))
Definition: thread.h:179
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
ff_rl_speedhq
RLTable ff_rl_speedhq
Definition: speedhq.c:141
RLTable::max_level
int8_t * max_level[2]
encoding & decoding
Definition: rl.h:46
s
#define s(width, name)
Definition: cbs_vp9.c:256
CHROMA_422
#define CHROMA_422
Definition: mpegvideo.h:458
bits
uint8_t bits
Definition: vp3data.h:141
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
ctx
AVFormatContext * ctx
Definition: movenc.c:48
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:50
ff_rl_init
av_cold void ff_rl_init(RLTable *rl, uint8_t static_store[2][2 *MAX_RUN+MAX_LEVEL+3])
Initialize index_run, max_level and max_run from n, last, table_vlc, table_run and table_level.
Definition: rl.c:27
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:64
AV_ONCE_INIT
#define AV_ONCE_INIT
Definition: thread.h:177
run
uint8_t run
Definition: svq3.c:205
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_CODEC_ID_SPEEDHQ
@ AV_CODEC_ID_SPEEDHQ
Definition: codec_id.h:274
ff_mpv_encode_end
av_cold int ff_mpv_encode_end(AVCodecContext *avctx)
Definition: mpegvideo_enc.c:932
flush_put_bits_le
static void flush_put_bits_le(PutBitContext *s)
Definition: put_bits.h:164
AVOnce
#define AVOnce
Definition: thread.h:176
ff_mpeg1_init_uni_ac_vlc
av_cold void ff_mpeg1_init_uni_ac_vlc(const RLTable *rl, uint8_t *uni_ac_vlc_len)
Definition: mpeg12enc.c:89
index
int index
Definition: gxfenc.c:89
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
codec_internal.h
ff_speedhq_mb_rows_in_slice
static int ff_speedhq_mb_rows_in_slice(int slice_num, int mb_height)
Definition: speedhqenc.c:263
encode_dc
static void encode_dc(PutBitContext *pb, int diff, int component)
Definition: speedhqenc.c:157
speedhq_static_rl_table_store
static uint8_t speedhq_static_rl_table_store[2][2 *MAX_RUN+MAX_LEVEL+3]
Definition: speedhqenc.c:43
CHROMA_444
#define CHROMA_444
Definition: mpegvideo.h:459
ff_speedhq_encode_mb
void ff_speedhq_encode_mb(MpegEncContext *s, int16_t block[12][64])
Definition: speedhqenc.c:240
speedhq_chr_dc_uni
static uint32_t speedhq_chr_dc_uni[512]
Definition: speedhqenc.c:56
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
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
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:211
speedhq_init_static_data
static av_cold void speedhq_init_static_data(void)
Definition: speedhqenc.c:66
avcodec.h
mpeg12data.h
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
mpeg12_vlc_dc_lum_code_reversed
static const uint16_t mpeg12_vlc_dc_lum_code_reversed[12]
Definition: speedhqenc.c:46
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:268
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
ff_mpv_encode_init
av_cold int ff_mpv_encode_init(AVCodecContext *avctx)
Definition: mpegvideo_enc.c:311
diff
static av_always_inline int diff(const uint32_t a, const uint32_t b)
Definition: vf_palettegen.c:139
SpeedHQEncContext::m
MpegEncContext m
Definition: speedhqenc.c:61
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:253
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
MKTAG
#define MKTAG(a, b, c, d)
Definition: macros.h:55
MpegEncContext
MpegEncContext.
Definition: mpegvideo.h:62
av_log2
int av_log2(unsigned v)
Definition: intmath.c:26