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vf_uspp.c
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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 {
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_INT, {.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 
190  for (i = 0; i < 3; i++) {
191  int is_chroma = !!i;
192  int w = FF_CEIL_RSHIFT(width, is_chroma ? p->hsub : 0);
193  int h = FF_CEIL_RSHIFT(height, is_chroma ? p->vsub : 0);
194  int stride = p->temp_stride[i];
195  int block = BLOCK >> (is_chroma ? p->hsub : 0);
196 
197  if (!src[i] || !dst[i])
198  continue;
199  for (y = 0; y < h; y++) {
200  int index = block + block * stride + y * stride;
201 
202  memcpy(p->src[i] + index, src[i] + y * src_stride[i], w );
203  for (x = 0; x < block; x++) {
204  p->src[i][index - x - 1] = p->src[i][index + x ];
205  p->src[i][index + w + x ] = p->src[i][index + w - x - 1];
206  }
207  }
208  for (y = 0; y < block; y++) {
209  memcpy(p->src[i] + ( block-1-y) * stride, p->src[i] + ( y+block ) * stride, stride);
210  memcpy(p->src[i] + (h+block +y) * stride, p->src[i] + (h-y+block-1) * stride, stride);
211  }
212 
213  p->frame->linesize[i] = stride;
214  memset(p->temp[i], 0, (h + 2 * block) * stride * sizeof(int16_t));
215  }
216 
217  if (p->qp)
218  p->frame->quality = p->qp * FF_QP2LAMBDA;
219  else {
220  int qpsum=0;
221  int qpcount = (height>>4) * (height>>4);
222 
223  for (y = 0; y < (height>>4); y++) {
224  for (x = 0; x < (width>>4); x++)
225  qpsum += qp_store[x + y * qp_stride];
226  }
227  p->frame->quality = ff_norm_qscale((qpsum + qpcount/2) / qpcount, p->qscale_type) * FF_QP2LAMBDA;
228  }
229 // init per MB qscale stuff FIXME
230  p->frame->height = height;
231  p->frame->width = width;
232 
233  for (i = 0; i < count; i++) {
234  const int x1 = offset[i+count-1][0];
235  const int y1 = offset[i+count-1][1];
236  const int x1c = x1 >> p->hsub;
237  const int y1c = y1 >> p->vsub;
238  const int BLOCKc = BLOCK >> p->hsub;
239  int offset;
240  AVPacket pkt = {0};
241  int got_pkt_ptr;
242 
243  av_init_packet(&pkt);
244  pkt.data = p->outbuf;
245  pkt.size = p->outbuf_size;
246 
247  p->frame->data[0] = p->src[0] + x1 + y1 * p->frame->linesize[0];
248  p->frame->data[1] = p->src[1] + x1c + y1c * p->frame->linesize[1];
249  p->frame->data[2] = p->src[2] + x1c + y1c * p->frame->linesize[2];
250  p->frame->format = p->avctx_enc[i]->pix_fmt;
251 
252  avcodec_encode_video2(p->avctx_enc[i], &pkt, p->frame, &got_pkt_ptr);
253  p->frame_dec = p->avctx_enc[i]->coded_frame;
254 
255  offset = (BLOCK-x1) + (BLOCK-y1) * p->frame_dec->linesize[0];
256 
257  for (y = 0; y < height; y++)
258  for (x = 0; x < width; x++)
259  p->temp[0][x + y * p->temp_stride[0]] += p->frame_dec->data[0][x + y * p->frame_dec->linesize[0] + offset];
260 
261  if (!src[2] || !dst[2])
262  continue;
263 
264  offset = (BLOCKc-x1c) + (BLOCKc-y1c) * p->frame_dec->linesize[1];
265 
266  for (y = 0; y < FF_CEIL_RSHIFT(height, p->vsub); y++) {
267  for (x = 0; x < FF_CEIL_RSHIFT(width, p->hsub); x++) {
268  p->temp[1][x + y * p->temp_stride[1]] += p->frame_dec->data[1][x + y * p->frame_dec->linesize[1] + offset];
269  p->temp[2][x + y * p->temp_stride[2]] += p->frame_dec->data[2][x + y * p->frame_dec->linesize[2] + offset];
270  }
271  }
272  }
273 
274  for (j = 0; j < 3; j++) {
275  int is_chroma = !!j;
276  if (!dst[j])
277  continue;
278  store_slice_c(dst[j], p->temp[j], dst_stride[j], p->temp_stride[j],
279  FF_CEIL_RSHIFT(width, is_chroma ? p->hsub : 0),
280  FF_CEIL_RSHIFT(height, is_chroma ? p->vsub : 0),
281  8-p->log2_count);
282  }
283 }
284 
285 static int query_formats(AVFilterContext *ctx)
286 {
287  static const enum PixelFormat pix_fmts[] = {
288  AV_PIX_FMT_YUV444P,
289  AV_PIX_FMT_YUV420P,
290  AV_PIX_FMT_YUV410P,
291  AV_PIX_FMT_YUVJ444P,
292  AV_PIX_FMT_YUVJ420P,
293  AV_PIX_FMT_GRAY8,
294  AV_PIX_FMT_NONE
295  };
296  ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
297  return 0;
298 }
299 
300 static int config_input(AVFilterLink *inlink)
301 {
302 
303  AVFilterContext *ctx = inlink->dst;
304  USPPContext *uspp = ctx->priv;
305  const int height = inlink->h;
306  const int width = inlink->w;
307  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
308  int i;
309 
310  AVCodec *enc = avcodec_find_encoder(AV_CODEC_ID_SNOW);
311  if (!enc) {
312  av_log(ctx, AV_LOG_ERROR, "SNOW encoder not found.\n");
313  return AVERROR(EINVAL);
314  }
315 
316  uspp->hsub = desc->log2_chroma_w;
317  uspp->vsub = desc->log2_chroma_h;
318 
319  for (i = 0; i < 3; i++) {
320  int is_chroma = !!i;
321  int w = (width + 4 * BLOCK-1) & (~(2 * BLOCK-1));
322  int h = (height + 4 * BLOCK-1) & (~(2 * BLOCK-1));
323 
324  if (is_chroma) {
325  w = FF_CEIL_RSHIFT(w, uspp->hsub);
326  h = FF_CEIL_RSHIFT(h, uspp->vsub);
327  }
328 
329  uspp->temp_stride[i] = w;
330  if (!(uspp->temp[i] = av_malloc_array(uspp->temp_stride[i], h * sizeof(int16_t))))
331  return AVERROR(ENOMEM);
332  if (!(uspp->src [i] = av_malloc_array(uspp->temp_stride[i], h * sizeof(uint8_t))))
333  return AVERROR(ENOMEM);
334  }
335 
336  for (i = 0; i < (1<<uspp->log2_count); i++) {
337  AVCodecContext *avctx_enc;
338  AVDictionary *opts = NULL;
339  int ret;
340 
341  if (!(uspp->avctx_enc[i] = avcodec_alloc_context3(NULL)))
342  return AVERROR(ENOMEM);
343 
344  avctx_enc = uspp->avctx_enc[i];
345  avctx_enc->width = width + BLOCK;
346  avctx_enc->height = height + BLOCK;
347  avctx_enc->time_base = (AVRational){1,25}; // meaningless
348  avctx_enc->gop_size = INT_MAX;
349  avctx_enc->max_b_frames = 0;
350  avctx_enc->pix_fmt = inlink->format;
351  avctx_enc->flags = CODEC_FLAG_QSCALE | CODEC_FLAG_LOW_DELAY;
352  avctx_enc->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
353  avctx_enc->global_quality = 123;
354  av_dict_set(&opts, "no_bitstream", "1", 0);
355  ret = avcodec_open2(avctx_enc, enc, &opts);
356  if (ret < 0)
357  return ret;
358  av_dict_free(&opts);
359  av_assert0(avctx_enc->codec);
360  }
361 
362  uspp->outbuf_size = (width + BLOCK) * (height + BLOCK) * 10;
363  if (!(uspp->frame = av_frame_alloc()))
364  return AVERROR(ENOMEM);
365  if (!(uspp->outbuf = av_malloc(uspp->outbuf_size)))
366  return AVERROR(ENOMEM);
367 
368  return 0;
369 }
370 
371 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
372 {
373  AVFilterContext *ctx = inlink->dst;
374  USPPContext *uspp = ctx->priv;
375  AVFilterLink *outlink = ctx->outputs[0];
376  AVFrame *out = in;
377 
378  int qp_stride = 0;
379  uint8_t *qp_table = NULL;
380 
381  /* if we are not in a constant user quantizer mode and we don't want to use
382  * the quantizers from the B-frames (B-frames often have a higher QP), we
383  * need to save the qp table from the last non B-frame; this is what the
384  * following code block does */
385  if (!uspp->qp) {
386  qp_table = av_frame_get_qp_table(in, &qp_stride, &uspp->qscale_type);
387 
388  if (qp_table && !uspp->use_bframe_qp && in->pict_type != AV_PICTURE_TYPE_B) {
389  int w, h;
390 
391  /* if the qp stride is not set, it means the QP are only defined on
392  * a line basis */
393  if (!qp_stride) {
394  w = FF_CEIL_RSHIFT(inlink->w, 4);
395  h = 1;
396  } else {
397  w = qp_stride;
398  h = FF_CEIL_RSHIFT(inlink->h, 4);
399  }
400 
401  if (w * h > uspp->non_b_qp_alloc_size) {
402  int ret = av_reallocp_array(&uspp->non_b_qp_table, w, h);
403  if (ret < 0) {
404  uspp->non_b_qp_alloc_size = 0;
405  return ret;
406  }
407  uspp->non_b_qp_alloc_size = w * h;
408  }
409 
410  av_assert0(w * h <= uspp->non_b_qp_alloc_size);
411  memcpy(uspp->non_b_qp_table, qp_table, w * h);
412  }
413  }
414 
415  if (uspp->log2_count && !ctx->is_disabled) {
416  if (!uspp->use_bframe_qp && uspp->non_b_qp_table)
417  qp_table = uspp->non_b_qp_table;
418 
419  if (qp_table || uspp->qp) {
420 
421  /* get a new frame if in-place is not possible or if the dimensions
422  * are not multiple of 8 */
423  if (!av_frame_is_writable(in) || (inlink->w & 7) || (inlink->h & 7)) {
424  const int aligned_w = FFALIGN(inlink->w, 8);
425  const int aligned_h = FFALIGN(inlink->h, 8);
426 
427  out = ff_get_video_buffer(outlink, aligned_w, aligned_h);
428  if (!out) {
429  av_frame_free(&in);
430  return AVERROR(ENOMEM);
431  }
432  av_frame_copy_props(out, in);
433  out->width = in->width;
434  out->height = in->height;
435  }
436 
437  filter(uspp, out->data, in->data, out->linesize, in->linesize,
438  inlink->w, inlink->h, qp_table, qp_stride);
439  }
440  }
441 
442  if (in != out) {
443  if (in->data[3])
444  av_image_copy_plane(out->data[3], out->linesize[3],
445  in ->data[3], in ->linesize[3],
446  inlink->w, inlink->h);
447  av_frame_free(&in);
448  }
449  return ff_filter_frame(outlink, out);
450 }
451 
452 static av_cold void uninit(AVFilterContext *ctx)
453 {
454  USPPContext *uspp = ctx->priv;
455  int i;
456 
457  for (i = 0; i < 3; i++) {
458  av_freep(&uspp->temp[i]);
459  av_freep(&uspp->src[i]);
460  }
461 
462  for (i = 0; i < (1 << uspp->log2_count); i++) {
463  avcodec_close(uspp->avctx_enc[i]);
464  av_freep(&uspp->avctx_enc[i]);
465  }
466 
467  av_freep(&uspp->non_b_qp_table);
468  av_freep(&uspp->outbuf);
469  av_frame_free(&uspp->frame);
470 }
471 
472 static const AVFilterPad uspp_inputs[] = {
473  {
474  .name = "default",
475  .type = AVMEDIA_TYPE_VIDEO,
476  .config_props = config_input,
477  .filter_frame = filter_frame,
478  },
479  { NULL }
480 };
481 
482 static const AVFilterPad uspp_outputs[] = {
483  {
484  .name = "default",
485  .type = AVMEDIA_TYPE_VIDEO,
486  },
487  { NULL }
488 };
489 
490 AVFilter ff_vf_uspp = {
491  .name = "uspp",
492  .description = NULL_IF_CONFIG_SMALL("Apply Ultra Simple / Slow Post-processing filter."),
493  .priv_size = sizeof(USPPContext),
494  .uninit = uninit,
495  .query_formats = query_formats,
496  .inputs = uspp_inputs,
497  .outputs = uspp_outputs,
498  .priv_class = &uspp_class,
499  .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
500 };
Generated on Sun Mar 8 2015 02:35:08 for FFmpeg by   doxygen 1.8.2