FFmpeg
vf_uspp.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
3  * Copyright (c) 2014 Arwa Arif <arwaarif1994@gmail.com>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or
10  * (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License along
18  * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20  */
21 
22 /**
23  * @file
24  * Ultra Slow/Simple Post-processing filter.
25  *
26  * Originally written by Michael Niedermayer for the MPlayer project, and
27  * ported by Arwa Arif for FFmpeg.
28  */
29 
30 #include "libavutil/avassert.h"
31 #include "libavutil/imgutils.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/pixdesc.h"
34 #include "internal.h"
35 #include "avfilter.h"
36 
37 #define MAX_LEVEL 8 /* quality levels */
38 #define BLOCK 16
39 
40 typedef struct USPPContext {
41  const AVClass *av_class;
42  int log2_count;
43  int hsub, vsub;
44  int qp;
45  int qscale_type;
46  int temp_stride[3];
47  uint8_t *src[3];
48  uint16_t *temp[3];
49  int outbuf_size;
50  uint8_t *outbuf;
51  AVCodecContext *avctx_enc[BLOCK*BLOCK];
52  AVFrame *frame;
53  AVFrame *frame_dec;
54  uint8_t *non_b_qp_table;
55  int non_b_qp_alloc_size;
56  int use_bframe_qp;
57 } USPPContext;
58 
59 #define OFFSET(x) offsetof(USPPContext, x)
60 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
61 static const AVOption uspp_options[] = {
62  { "quality", "set quality", OFFSET(log2_count), AV_OPT_TYPE_INT, {.i64 = 3}, 0, MAX_LEVEL, FLAGS },
63  { "qp", "force a constant quantizer parameter", OFFSET(qp), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 63, FLAGS },
64  { "use_bframe_qp", "use B-frames' QP", OFFSET(use_bframe_qp), AV_OPT_TYPE_BOOL,{.i64 = 0}, 0, 1, FLAGS },
65  { NULL }
66 };
67 
68 AVFILTER_DEFINE_CLASS(uspp);
69 
70 DECLARE_ALIGNED(8, static const uint8_t, dither)[8][8] = {
71  { 0*4, 48*4, 12*4, 60*4, 3*4, 51*4, 15*4, 63*4, },
72  { 32*4, 16*4, 44*4, 28*4, 35*4, 19*4, 47*4, 31*4, },
73  { 8*4, 56*4, 4*4, 52*4, 11*4, 59*4, 7*4, 55*4, },
74  { 40*4, 24*4, 36*4, 20*4, 43*4, 27*4, 39*4, 23*4, },
75  { 2*4, 50*4, 14*4, 62*4, 1*4, 49*4, 13*4, 61*4, },
76  { 34*4, 18*4, 46*4, 30*4, 33*4, 17*4, 45*4, 29*4, },
77  { 10*4, 58*4, 6*4, 54*4, 9*4, 57*4, 5*4, 53*4, },
78  { 42*4, 26*4, 38*4, 22*4, 41*4, 25*4, 37*4, 21*4, },
79 };
80 
81 static const uint8_t offset[511][2] = {
82  { 0, 0},
83  { 0, 0}, { 8, 8}, // quality 1
84  { 0, 0}, { 4, 4}, {12, 8}, { 8,12}, // quality 2
85  { 0, 0}, {10, 2}, { 4, 4}, {14, 6}, { 8, 8}, { 2,10}, {12,12}, { 6,14}, // quality 3
86 
87  { 0, 0}, {10, 2}, { 4, 4}, {14, 6}, { 8, 8}, { 2,10}, {12,12}, { 6,14},
88  { 5, 1}, {15, 3}, { 9, 5}, { 3, 7}, {13, 9}, { 7,11}, { 1,13}, {11,15}, // quality 4
89 
90  { 0, 0}, { 8, 0}, { 0, 8}, { 8, 8}, { 5, 1}, {13, 1}, { 5, 9}, {13, 9},
91  { 2, 2}, {10, 2}, { 2,10}, {10,10}, { 7, 3}, {15, 3}, { 7,11}, {15,11},
92  { 4, 4}, {12, 4}, { 4,12}, {12,12}, { 1, 5}, { 9, 5}, { 1,13}, { 9,13},
93  { 6, 6}, {14, 6}, { 6,14}, {14,14}, { 3, 7}, {11, 7}, { 3,15}, {11,15}, // quality 5
94 
95  { 0, 0}, { 8, 0}, { 0, 8}, { 8, 8}, { 4, 0}, {12, 0}, { 4, 8}, {12, 8},
96  { 1, 1}, { 9, 1}, { 1, 9}, { 9, 9}, { 5, 1}, {13, 1}, { 5, 9}, {13, 9},
97  { 3, 2}, {11, 2}, { 3,10}, {11,10}, { 7, 2}, {15, 2}, { 7,10}, {15,10},
98  { 2, 3}, {10, 3}, { 2,11}, {10,11}, { 6, 3}, {14, 3}, { 6,11}, {14,11},
99  { 0, 4}, { 8, 4}, { 0,12}, { 8,12}, { 4, 4}, {12, 4}, { 4,12}, {12,12},
100  { 1, 5}, { 9, 5}, { 1,13}, { 9,13}, { 5, 5}, {13, 5}, { 5,13}, {13,13},
101  { 3, 6}, {11, 6}, { 3,14}, {11,14}, { 7, 6}, {15, 6}, { 7,14}, {15,14},
102  { 2, 7}, {10, 7}, { 2,15}, {10,15}, { 6, 7}, {14, 7}, { 6,15}, {14,15}, // quality 6
103 
104  { 0, 0}, { 8, 0}, { 0, 8}, { 8, 8}, { 0, 2}, { 8, 2}, { 0,10}, { 8,10},
105  { 0, 4}, { 8, 4}, { 0,12}, { 8,12}, { 0, 6}, { 8, 6}, { 0,14}, { 8,14},
106  { 1, 1}, { 9, 1}, { 1, 9}, { 9, 9}, { 1, 3}, { 9, 3}, { 1,11}, { 9,11},
107  { 1, 5}, { 9, 5}, { 1,13}, { 9,13}, { 1, 7}, { 9, 7}, { 1,15}, { 9,15},
108  { 2, 0}, {10, 0}, { 2, 8}, {10, 8}, { 2, 2}, {10, 2}, { 2,10}, {10,10},
109  { 2, 4}, {10, 4}, { 2,12}, {10,12}, { 2, 6}, {10, 6}, { 2,14}, {10,14},
110  { 3, 1}, {11, 1}, { 3, 9}, {11, 9}, { 3, 3}, {11, 3}, { 3,11}, {11,11},
111  { 3, 5}, {11, 5}, { 3,13}, {11,13}, { 3, 7}, {11, 7}, { 3,15}, {11,15},
112  { 4, 0}, {12, 0}, { 4, 8}, {12, 8}, { 4, 2}, {12, 2}, { 4,10}, {12,10},
113  { 4, 4}, {12, 4}, { 4,12}, {12,12}, { 4, 6}, {12, 6}, { 4,14}, {12,14},
114  { 5, 1}, {13, 1}, { 5, 9}, {13, 9}, { 5, 3}, {13, 3}, { 5,11}, {13,11},
115  { 5, 5}, {13, 5}, { 5,13}, {13,13}, { 5, 7}, {13, 7}, { 5,15}, {13,15},
116  { 6, 0}, {14, 0}, { 6, 8}, {14, 8}, { 6, 2}, {14, 2}, { 6,10}, {14,10},
117  { 6, 4}, {14, 4}, { 6,12}, {14,12}, { 6, 6}, {14, 6}, { 6,14}, {14,14},
118  { 7, 1}, {15, 1}, { 7, 9}, {15, 9}, { 7, 3}, {15, 3}, { 7,11}, {15,11},
119  { 7, 5}, {15, 5}, { 7,13}, {15,13}, { 7, 7}, {15, 7}, { 7,15}, {15,15}, // quality 7
120 
121  { 0, 0}, { 8, 0}, { 0, 8}, { 8, 8}, { 4, 4}, {12, 4}, { 4,12}, {12,12},
122  { 0, 4}, { 8, 4}, { 0,12}, { 8,12}, { 4, 0}, {12, 0}, { 4, 8}, {12, 8},
123  { 2, 2}, {10, 2}, { 2,10}, {10,10}, { 6, 6}, {14, 6}, { 6,14}, {14,14},
124  { 2, 6}, {10, 6}, { 2,14}, {10,14}, { 6, 2}, {14, 2}, { 6,10}, {14,10},
125  { 0, 2}, { 8, 2}, { 0,10}, { 8,10}, { 4, 6}, {12, 6}, { 4,14}, {12,14},
126  { 0, 6}, { 8, 6}, { 0,14}, { 8,14}, { 4, 2}, {12, 2}, { 4,10}, {12,10},
127  { 2, 0}, {10, 0}, { 2, 8}, {10, 8}, { 6, 4}, {14, 4}, { 6,12}, {14,12},
128  { 2, 4}, {10, 4}, { 2,12}, {10,12}, { 6, 0}, {14, 0}, { 6, 8}, {14, 8},
129  { 1, 1}, { 9, 1}, { 1, 9}, { 9, 9}, { 5, 5}, {13, 5}, { 5,13}, {13,13},
130  { 1, 5}, { 9, 5}, { 1,13}, { 9,13}, { 5, 1}, {13, 1}, { 5, 9}, {13, 9},
131  { 3, 3}, {11, 3}, { 3,11}, {11,11}, { 7, 7}, {15, 7}, { 7,15}, {15,15},
132  { 3, 7}, {11, 7}, { 3,15}, {11,15}, { 7, 3}, {15, 3}, { 7,11}, {15,11},
133  { 1, 3}, { 9, 3}, { 1,11}, { 9,11}, { 5, 7}, {13, 7}, { 5,15}, {13,15},
134  { 1, 7}, { 9, 7}, { 1,15}, { 9,15}, { 5, 3}, {13, 3}, { 5,11}, {13,11}, // quality 8
135  { 3, 1}, {11, 1}, { 3, 9}, {11, 9}, { 7, 5}, {15, 5}, { 7,13}, {15,13},
136  { 3, 5}, {11, 5}, { 3,13}, {11,13}, { 7, 1}, {15, 1}, { 7, 9}, {15, 9},
137  { 0, 1}, { 8, 1}, { 0, 9}, { 8, 9}, { 4, 5}, {12, 5}, { 4,13}, {12,13},
138  { 0, 5}, { 8, 5}, { 0,13}, { 8,13}, { 4, 1}, {12, 1}, { 4, 9}, {12, 9},
139  { 2, 3}, {10, 3}, { 2,11}, {10,11}, { 6, 7}, {14, 7}, { 6,15}, {14,15},
140  { 2, 7}, {10, 7}, { 2,15}, {10,15}, { 6, 3}, {14, 3}, { 6,11}, {14,11},
141  { 0, 3}, { 8, 3}, { 0,11}, { 8,11}, { 4, 7}, {12, 7}, { 4,15}, {12,15},
142  { 0, 7}, { 8, 7}, { 0,15}, { 8,15}, { 4, 3}, {12, 3}, { 4,11}, {12,11},
143  { 2, 1}, {10, 1}, { 2, 9}, {10, 9}, { 6, 5}, {14, 5}, { 6,13}, {14,13},
144  { 2, 5}, {10, 5}, { 2,13}, {10,13}, { 6, 1}, {14, 1}, { 6, 9}, {14, 9},
145  { 1, 0}, { 9, 0}, { 1, 8}, { 9, 8}, { 5, 4}, {13, 4}, { 5,12}, {13,12},
146  { 1, 4}, { 9, 4}, { 1,12}, { 9,12}, { 5, 0}, {13, 0}, { 5, 8}, {13, 8},
147  { 3, 2}, {11, 2}, { 3,10}, {11,10}, { 7, 6}, {15, 6}, { 7,14}, {15,14},
148  { 3, 6}, {11, 6}, { 3,14}, {11,14}, { 7, 2}, {15, 2}, { 7,10}, {15,10},
149  { 1, 2}, { 9, 2}, { 1,10}, { 9,10}, { 5, 6}, {13, 6}, { 5,14}, {13,14},
150  { 1, 6}, { 9, 6}, { 1,14}, { 9,14}, { 5, 2}, {13, 2}, { 5,10}, {13,10},
151  { 3, 0}, {11, 0}, { 3, 8}, {11, 8}, { 7, 4}, {15, 4}, { 7,12}, {15,12},
152  { 3, 4}, {11, 4}, { 3,12}, {11,12}, { 7, 0}, {15, 0}, { 7, 8}, {15, 8},
153 };
154 
155 static void store_slice_c(uint8_t *dst, const uint16_t *src,
156  int dst_stride, int src_stride,
157  int width, int height, int log2_scale)
158 {
159  int y, x;
160 
161 #define STORE(pos) do { \
162  temp = ((src[x + y * src_stride + pos] << log2_scale) + d[pos]) >> 8; \
163  if (temp & 0x100) temp = ~(temp >> 31); \
164  dst[x + y * dst_stride + pos] = temp; \
165 } while (0)
166 
167  for (y = 0; y < height; y++) {
168  const uint8_t *d = dither[y&7];
169  for (x = 0; x < width; x += 8) {
170  int temp;
171  STORE(0);
172  STORE(1);
173  STORE(2);
174  STORE(3);
175  STORE(4);
176  STORE(5);
177  STORE(6);
178  STORE(7);
179  }
180  }
181 }
182 
183 static void filter(USPPContext *p, uint8_t *dst[3], uint8_t *src[3],
184  int dst_stride[3], int src_stride[3], int width,
185  int height, uint8_t *qp_store, int qp_stride)
186 {
187  int x, y, i, j;
188  const int count = 1<<p->log2_count;
189  int ret;
190 
191  for (i = 0; i < 3; i++) {
192  int is_chroma = !!i;
193  int w = AV_CEIL_RSHIFT(width, is_chroma ? p->hsub : 0);
194  int h = AV_CEIL_RSHIFT(height, is_chroma ? p->vsub : 0);
195  int stride = p->temp_stride[i];
196  int block = BLOCK >> (is_chroma ? p->hsub : 0);
197 
198  if (!src[i] || !dst[i])
199  continue;
200  for (y = 0; y < h; y++) {
201  int index = block + block * stride + y * stride;
202 
203  memcpy(p->src[i] + index, src[i] + y * src_stride[i], w );
204  for (x = 0; x < block; x++) {
205  p->src[i][index - x - 1] = p->src[i][index + x ];
206  p->src[i][index + w + x ] = p->src[i][index + w - x - 1];
207  }
208  }
209  for (y = 0; y < block; y++) {
210  memcpy(p->src[i] + ( block-1-y) * stride, p->src[i] + ( y+block ) * stride, stride);
211  memcpy(p->src[i] + (h+block +y) * stride, p->src[i] + (h-y+block-1) * stride, stride);
212  }
213 
214  p->frame->linesize[i] = stride;
215  memset(p->temp[i], 0, (h + 2 * block) * stride * sizeof(int16_t));
216  }
217 
218  if (p->qp)
219  p->frame->quality = p->qp * FF_QP2LAMBDA;
220  else {
221  int qpsum=0;
222  int qpcount = (height>>4) * (height>>4);
223 
224  for (y = 0; y < (height>>4); y++) {
225  for (x = 0; x < (width>>4); x++)
226  qpsum += qp_store[x + y * qp_stride];
227  }
228  p->frame->quality = ff_norm_qscale((qpsum + qpcount/2) / qpcount, p->qscale_type) * FF_QP2LAMBDA;
229  }
230 // init per MB qscale stuff FIXME
231  p->frame->height = height + BLOCK;
232  p->frame->width = width + BLOCK;
233 
234  for (i = 0; i < count; i++) {
235  const int x1 = offset[i+count-1][0];
236  const int y1 = offset[i+count-1][1];
237  const int x1c = x1 >> p->hsub;
238  const int y1c = y1 >> p->vsub;
239  const int BLOCKc = BLOCK >> p->hsub;
240  int offset;
241  AVPacket pkt = {0};
242  int got_pkt_ptr;
243 
244  av_init_packet(&pkt);
245  pkt.data = p->outbuf;
246  pkt.size = p->outbuf_size;
247 
248  p->frame->data[0] = p->src[0] + x1 + y1 * p->frame->linesize[0];
249  p->frame->data[1] = p->src[1] + x1c + y1c * p->frame->linesize[1];
250  p->frame->data[2] = p->src[2] + x1c + y1c * p->frame->linesize[2];
251  p->frame->format = p->avctx_enc[i]->pix_fmt;
252 
253  ret = avcodec_encode_video2(p->avctx_enc[i], &pkt, p->frame, &got_pkt_ptr);
254  if (ret < 0) {
255  av_log(p->avctx_enc[i], AV_LOG_ERROR, "Encoding failed\n");
256  continue;
257  }
258 
259  p->frame_dec = p->avctx_enc[i]->coded_frame;
260 
261  offset = (BLOCK-x1) + (BLOCK-y1) * p->frame_dec->linesize[0];
262 
263  for (y = 0; y < height; y++)
264  for (x = 0; x < width; x++)
265  p->temp[0][x + y * p->temp_stride[0]] += p->frame_dec->data[0][x + y * p->frame_dec->linesize[0] + offset];
266 
267  if (!src[2] || !dst[2])
268  continue;
269 
270  offset = (BLOCKc-x1c) + (BLOCKc-y1c) * p->frame_dec->linesize[1];
271 
272  for (y = 0; y < AV_CEIL_RSHIFT(height, p->vsub); y++) {
273  for (x = 0; x < AV_CEIL_RSHIFT(width, p->hsub); x++) {
274  p->temp[1][x + y * p->temp_stride[1]] += p->frame_dec->data[1][x + y * p->frame_dec->linesize[1] + offset];
275  p->temp[2][x + y * p->temp_stride[2]] += p->frame_dec->data[2][x + y * p->frame_dec->linesize[2] + offset];
276  }
277  }
278  }
279 
280  for (j = 0; j < 3; j++) {
281  int is_chroma = !!j;
282  if (!dst[j])
283  continue;
284  store_slice_c(dst[j], p->temp[j], dst_stride[j], p->temp_stride[j],
285  AV_CEIL_RSHIFT(width, is_chroma ? p->hsub : 0),
286  AV_CEIL_RSHIFT(height, is_chroma ? p->vsub : 0),
287  8-p->log2_count);
288  }
289 }
290 
291 static int query_formats(AVFilterContext *ctx)
292 {
293  static const enum AVPixelFormat pix_fmts[] = {
294  AV_PIX_FMT_YUV444P,
295  AV_PIX_FMT_YUV420P,
296  AV_PIX_FMT_YUV410P,
297  AV_PIX_FMT_YUVJ444P,
298  AV_PIX_FMT_YUVJ420P,
299  AV_PIX_FMT_GRAY8,
300  AV_PIX_FMT_NONE
301  };
302 
303  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
304  if (!fmts_list)
305  return AVERROR(ENOMEM);
306  return ff_set_common_formats(ctx, fmts_list);
307 }
308 
309 static int config_input(AVFilterLink *inlink)
310 {
311 
312  AVFilterContext *ctx = inlink->dst;
313  USPPContext *uspp = ctx->priv;
314  const int height = inlink->h;
315  const int width = inlink->w;
316  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
317  int i;
318 
319  AVCodec *enc = avcodec_find_encoder(AV_CODEC_ID_SNOW);
320  if (!enc) {
321  av_log(ctx, AV_LOG_ERROR, "SNOW encoder not found.\n");
322  return AVERROR(EINVAL);
323  }
324 
325  uspp->hsub = desc->log2_chroma_w;
326  uspp->vsub = desc->log2_chroma_h;
327 
328  for (i = 0; i < 3; i++) {
329  int is_chroma = !!i;
330  int w = (width + 4 * BLOCK-1) & (~(2 * BLOCK-1));
331  int h = (height + 4 * BLOCK-1) & (~(2 * BLOCK-1));
332 
333  if (is_chroma) {
334  w = AV_CEIL_RSHIFT(w, uspp->hsub);
335  h = AV_CEIL_RSHIFT(h, uspp->vsub);
336  }
337 
338  uspp->temp_stride[i] = w;
339  if (!(uspp->temp[i] = av_malloc_array(uspp->temp_stride[i], h * sizeof(int16_t))))
340  return AVERROR(ENOMEM);
341  if (!(uspp->src [i] = av_malloc_array(uspp->temp_stride[i], h * sizeof(uint8_t))))
342  return AVERROR(ENOMEM);
343  }
344 
345  for (i = 0; i < (1<<uspp->log2_count); i++) {
346  AVCodecContext *avctx_enc;
347  AVDictionary *opts = NULL;
348  int ret;
349 
350  if (!(uspp->avctx_enc[i] = avcodec_alloc_context3(NULL)))
351  return AVERROR(ENOMEM);
352 
353  avctx_enc = uspp->avctx_enc[i];
354  avctx_enc->width = width + BLOCK;
355  avctx_enc->height = height + BLOCK;
356  avctx_enc->time_base = (AVRational){1,25}; // meaningless
357  avctx_enc->gop_size = INT_MAX;
358  avctx_enc->max_b_frames = 0;
359  avctx_enc->pix_fmt = inlink->format;
360  avctx_enc->flags = AV_CODEC_FLAG_QSCALE | AV_CODEC_FLAG_LOW_DELAY;
361  avctx_enc->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
362  avctx_enc->global_quality = 123;
363  av_dict_set(&opts, "no_bitstream", "1", 0);
364  ret = avcodec_open2(avctx_enc, enc, &opts);
365  if (ret < 0)
366  return ret;
367  av_dict_free(&opts);
368  av_assert0(avctx_enc->codec);
369  }
370 
371  uspp->outbuf_size = (width + BLOCK) * (height + BLOCK) * 10;
372  if (!(uspp->frame = av_frame_alloc()))
373  return AVERROR(ENOMEM);
374  if (!(uspp->outbuf = av_malloc(uspp->outbuf_size)))
375  return AVERROR(ENOMEM);
376 
377  return 0;
378 }
379 
380 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
381 {
382  AVFilterContext *ctx = inlink->dst;
383  USPPContext *uspp = ctx->priv;
384  AVFilterLink *outlink = ctx->outputs[0];
385  AVFrame *out = in;
386 
387  int qp_stride = 0;
388  uint8_t *qp_table = NULL;
389 
390  /* if we are not in a constant user quantizer mode and we don't want to use
391  * the quantizers from the B-frames (B-frames often have a higher QP), we
392  * need to save the qp table from the last non B-frame; this is what the
393  * following code block does */
394  if (!uspp->qp) {
395  qp_table = av_frame_get_qp_table(in, &qp_stride, &uspp->qscale_type);
396 
397  if (qp_table && !uspp->use_bframe_qp && in->pict_type != AV_PICTURE_TYPE_B) {
398  int w, h;
399 
400  /* if the qp stride is not set, it means the QP are only defined on
401  * a line basis */
402  if (!qp_stride) {
403  w = AV_CEIL_RSHIFT(inlink->w, 4);
404  h = 1;
405  } else {
406  w = qp_stride;
407  h = AV_CEIL_RSHIFT(inlink->h, 4);
408  }
409 
410  if (w * h > uspp->non_b_qp_alloc_size) {
411  int ret = av_reallocp_array(&uspp->non_b_qp_table, w, h);
412  if (ret < 0) {
413  uspp->non_b_qp_alloc_size = 0;
414  return ret;
415  }
416  uspp->non_b_qp_alloc_size = w * h;
417  }
418 
419  av_assert0(w * h <= uspp->non_b_qp_alloc_size);
420  memcpy(uspp->non_b_qp_table, qp_table, w * h);
421  }
422  }
423 
424  if (uspp->log2_count && !ctx->is_disabled) {
425  if (!uspp->use_bframe_qp && uspp->non_b_qp_table)
426  qp_table = uspp->non_b_qp_table;
427 
428  if (qp_table || uspp->qp) {
429 
430  /* get a new frame if in-place is not possible or if the dimensions
431  * are not multiple of 8 */
432  if (!av_frame_is_writable(in) || (inlink->w & 7) || (inlink->h & 7)) {
433  const int aligned_w = FFALIGN(inlink->w, 8);
434  const int aligned_h = FFALIGN(inlink->h, 8);
435 
436  out = ff_get_video_buffer(outlink, aligned_w, aligned_h);
437  if (!out) {
438  av_frame_free(&in);
439  return AVERROR(ENOMEM);
440  }
441  av_frame_copy_props(out, in);
442  out->width = in->width;
443  out->height = in->height;
444  }
445 
446  filter(uspp, out->data, in->data, out->linesize, in->linesize,
447  inlink->w, inlink->h, qp_table, qp_stride);
448  }
449  }
450 
451  if (in != out) {
452  if (in->data[3])
453  av_image_copy_plane(out->data[3], out->linesize[3],
454  in ->data[3], in ->linesize[3],
455  inlink->w, inlink->h);
456  av_frame_free(&in);
457  }
458  return ff_filter_frame(outlink, out);
459 }
460 
461 static av_cold void uninit(AVFilterContext *ctx)
462 {
463  USPPContext *uspp = ctx->priv;
464  int i;
465 
466  for (i = 0; i < 3; i++) {
467  av_freep(&uspp->temp[i]);
468  av_freep(&uspp->src[i]);
469  }
470 
471  for (i = 0; i < (1 << uspp->log2_count); i++) {
472  avcodec_close(uspp->avctx_enc[i]);
473  av_freep(&uspp->avctx_enc[i]);
474  }
475 
476  av_freep(&uspp->non_b_qp_table);
477  av_freep(&uspp->outbuf);
478  av_frame_free(&uspp->frame);
479 }
480 
481 static const AVFilterPad uspp_inputs[] = {
482  {
483  .name = "default",
484  .type = AVMEDIA_TYPE_VIDEO,
485  .config_props = config_input,
486  .filter_frame = filter_frame,
487  },
488  { NULL }
489 };
490 
491 static const AVFilterPad uspp_outputs[] = {
492  {
493  .name = "default",
494  .type = AVMEDIA_TYPE_VIDEO,
495  },
496  { NULL }
497 };
498 
499 AVFilter ff_vf_uspp = {
500  .name = "uspp",
501  .description = NULL_IF_CONFIG_SMALL("Apply Ultra Simple / Slow Post-processing filter."),
502  .priv_size = sizeof(USPPContext),
503  .uninit = uninit,
504  .query_formats = query_formats,
505  .inputs = uspp_inputs,
506  .outputs = uspp_outputs,
507  .priv_class = &uspp_class,
508  .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
509 };
STORE
#define STORE(pos)
avcodec_close
int avcodec_close(AVCodecContext *avctx)
Close a given AVCodecContext and free all the data associated with it (but not the AVCodecContext its...
Definition: utils.c:1117
ff_get_video_buffer
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:99
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_uspp.c:461
USPPContext::src
uint8_t * src[3]
Definition: vf_uspp.c:47
USPPContext::frame
AVFrame * frame
Definition: vf_uspp.c:52
USPPContext::qp
int qp
Definition: vf_uspp.c:44
AVCodec
AVCodec.
Definition: avcodec.h:3481
stride
int stride
Definition: mace.c:144
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_uspp.c:380
USPPContext::avctx_enc
AVCodecContext * avctx_enc[BLOCK *BLOCK]
Definition: vf_uspp.c:51
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
opt.h
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
out
FILE * out
Definition: movenc.c:54
FF_COMPLIANCE_EXPERIMENTAL
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:2633
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1080
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2522
AV_CODEC_FLAG_QSCALE
#define AV_CODEC_FLAG_QSCALE
Use fixed qscale.
Definition: avcodec.h:850
USPPContext::temp
uint16_t * temp[3]
Definition: vf_uspp.c:48
inlink
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
Definition: filter_design.txt:212
count
void INT64 INT64 count
Definition: avisynth_c.h:767
avcodec_find_encoder
AVCodec * avcodec_find_encoder(enum AVCodecID id)
Find a registered encoder with a matching codec ID.
Definition: allcodecs.c:885
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
pixdesc.h
AVFrame::width
int width
Definition: frame.h:353
w
uint8_t w
Definition: llviddspenc.c:38
AVPacket::data
uint8_t * data
Definition: avcodec.h:1477
AVOption
AVOption.
Definition: opt.h:246
BLOCK
#define BLOCK
Definition: vf_uspp.c:38
offset
static const uint8_t offset[511][2]
Definition: vf_uspp.c:81
AVDictionary
Definition: dict.c:30
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_uspp.c:309
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:148
USPPContext::vsub
int vsub
Definition: vf_uspp.c:43
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
av_image_copy_plane
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
Definition: imgutils.c:338
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
av_frame_get_qp_table
int8_t * av_frame_get_qp_table(AVFrame *f, int *stride, int *type)
Definition: frame.c:90
USPPContext::use_bframe_qp
int use_bframe_qp
Definition: vf_uspp.c:56
USPPContext::qscale_type
int qscale_type
Definition: vf_uspp.c:45
AVCodecContext::codec
const struct AVCodec * codec
Definition: avcodec.h:1574
AVCodecContext::flags
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1645
AV_CODEC_FLAG_LOW_DELAY
#define AV_CODEC_FLAG_LOW_DELAY
Force low delay.
Definition: avcodec.h:900
src
#define src
Definition: vp8dsp.c:254
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:189
avassert.h
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
av_cold
#define av_cold
Definition: attributes.h:84
store_slice_c
static void store_slice_c(uint8_t *dst, const uint16_t *src, int dst_stride, int src_stride, int width, int height, int log2_scale)
Definition: vf_uspp.c:155
ff_set_common_formats
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:568
uspp_outputs
static const AVFilterPad uspp_outputs[]
Definition: vf_uspp.c:491
avcodec_alloc_context3
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:156
width
#define width
AVCodecContext::global_quality
int global_quality
Global quality for codecs which cannot change it per frame.
Definition: avcodec.h:1631
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
outputs
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
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
AV_PIX_FMT_YUVJ444P
@ AV_PIX_FMT_YUVJ444P
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:80
if
if(ret)
Definition: filter_design.txt:179
opts
AVDictionary * opts
Definition: movenc.c:50
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
NULL
#define NULL
Definition: coverity.c:32
av_frame_copy_props
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:654
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(uspp)
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AV_PIX_FMT_YUVJ420P
@ AV_PIX_FMT_YUVJ420P
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
USPPContext::log2_count
int log2_count
Definition: vf_uspp.c:42
avcodec_open2
int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
Definition: utils.c:565
dither
static const uint8_t dither[8][8]
Definition: vf_uspp.c:70
inputs
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
Definition: filter_design.txt:243
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
index
int index
Definition: gxfenc.c:89
AVCodecContext::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avcodec.h:1688
USPPContext::outbuf
uint8_t * outbuf
Definition: vf_uspp.c:50
desc
const char * desc
Definition: nvenc.c:68
USPPContext::non_b_qp_alloc_size
int non_b_qp_alloc_size
Definition: vf_uspp.c:55
AVPacket::size
int size
Definition: avcodec.h:1478
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:188
AVCodecContext::gop_size
int gop_size
the number of pictures in a group of pictures, or 0 for intra_only
Definition: avcodec.h:1760
USPPContext::av_class
const AVClass * av_class
Definition: vf_uspp.c:41
AVFrame::quality
int quality
quality (between 1 (good) and FF_LAMBDA_MAX (bad))
Definition: frame.h:418
av_frame_is_writable
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:594
AVFrame::format
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames,...
Definition: frame.h:368
ff_norm_qscale
static int ff_norm_qscale(int qscale, int type)
Normalize the qscale factor FIXME the H264 qscale is a log based scale, mpeg1/2 is not,...
Definition: internal.h:397
ff_vf_uspp
AVFilter ff_vf_uspp
Definition: vf_uspp.c:499
height
#define height
av_reallocp_array
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Allocate, reallocate, or free an array through a pointer to a pointer.
Definition: mem.c:205
avcodec_encode_video2
attribute_deprecated int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Encode a frame of video.
Definition: encode.c:258
av_dict_free
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
Definition: dict.c:203
internal.h
DECLARE_ALIGNED
#define DECLARE_ALIGNED(n, t, v)
Definition: mem.h:112
in
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Definition: audio_convert.c:326
USPPContext::frame_dec
AVFrame * frame_dec
Definition: vf_uspp.c:53
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
MAX_LEVEL
#define MAX_LEVEL
Definition: vf_uspp.c:37
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:32
uint8_t
uint8_t
Definition: audio_convert.c:194
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
AVCodecContext::height
int height
Definition: avcodec.h:1738
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1775
USPPContext
Definition: vf_uspp.c:40
AVFilter
Filter definition.
Definition: avfilter.h:144
ret
ret
Definition: filter_design.txt:187
USPPContext::non_b_qp_table
uint8_t * non_b_qp_table
Definition: vf_uspp.c:54
AVCodecContext::strict_std_compliance
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:2628
AVCodecContext::coded_frame
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2815
uspp_options
static const AVOption uspp_options[]
Definition: vf_uspp.c:61
AVCodecContext
main external API structure.
Definition: avcodec.h:1565
AVFrame::height
int height
Definition: frame.h:353
AV_CODEC_ID_SNOW
@ AV_CODEC_ID_SNOW
Definition: avcodec.h:426
uspp_inputs
static const AVFilterPad uspp_inputs[]
Definition: vf_uspp.c:481
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
AV_PICTURE_TYPE_B
@ AV_PICTURE_TYPE_B
Bi-dir predicted.
Definition: avutil.h:276
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:223
avfilter.h
temp
else temp
Definition: vf_mcdeint.c:256
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_uspp.c:291
filter
static void filter(USPPContext *p, uint8_t *dst[3], uint8_t *src[3], int dst_stride[3], int src_stride[3], int width, int height, uint8_t *qp_store, int qp_stride)
Definition: vf_uspp.c:183
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
AVFilterContext
An instance of a filter.
Definition: avfilter.h:338
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVCodecContext::max_b_frames
int max_b_frames
maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 re...
Definition: avcodec.h:1825
FLAGS
#define FLAGS
Definition: vf_uspp.c:60
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:48
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1454
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:240
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
av_dict_set
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
USPPContext::outbuf_size
int outbuf_size
Definition: vf_uspp.c:49
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:1738
AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
#define AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
Same as AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, except that the filter will have its filter_frame() c...
Definition: avfilter.h:133
imgutils.h
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:565
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:326
AV_PIX_FMT_YUV410P
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
block
The exact code depends on how similar the blocks are and how related they are to the block
Definition: filter_design.txt:207
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
h
h
Definition: vp9dsp_template.c:2038
OFFSET
#define OFFSET(x)
Definition: vf_uspp.c:59
FF_QP2LAMBDA
#define FF_QP2LAMBDA
factor to convert from H.263 QP to lambda
Definition: avutil.h:227
USPPContext::hsub
int hsub
Definition: vf_uspp.c:43
av_init_packet
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
USPPContext::temp_stride
int temp_stride[3]
Definition: vf_uspp.c:46
Generated on Wed Aug 24 2022 21:27:17 for FFmpeg by   doxygen 1.8.17