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vf_sr.c
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1 /*
2  * Copyright (c) 2018 Sergey Lavrushkin
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * Filter implementing image super-resolution using deep convolutional networks.
24  * https://arxiv.org/abs/1501.00092
25  * https://arxiv.org/abs/1609.05158
26  */
27 
28 #include "avfilter.h"
29 #include "formats.h"
30 #include "internal.h"
31 #include "libavutil/opt.h"
32 #include "libavformat/avio.h"
33 #include "libswscale/swscale.h"
34 #include "dnn_interface.h"
35 
36 typedef struct SRContext {
37  const AVClass *class;
38 
47 } SRContext;
48 
49 #define OFFSET(x) offsetof(SRContext, x)
50 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
51 static const AVOption sr_options[] = {
52  { "dnn_backend", "DNN backend used for model execution", OFFSET(backend_type), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, 1, FLAGS, "backend" },
53  { "native", "native backend flag", 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, 0, 0, FLAGS, "backend" },
54 #if (CONFIG_LIBTENSORFLOW == 1)
55  { "tensorflow", "tensorflow backend flag", 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, 0, 0, FLAGS, "backend" },
56 #endif
57  { "scale_factor", "scale factor for SRCNN model", OFFSET(scale_factor), AV_OPT_TYPE_INT, { .i64 = 2 }, 2, 4, FLAGS },
58  { "model", "path to model file specifying network architecture and its parameters", OFFSET(model_filename), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
59  { NULL }
60 };
61 
63 
64 static av_cold int init(AVFilterContext *context)
65 {
66  SRContext *sr_context = context->priv;
67 
68  sr_context->dnn_module = ff_get_dnn_module(sr_context->backend_type);
69  if (!sr_context->dnn_module){
70  av_log(context, AV_LOG_ERROR, "could not create DNN module for requested backend\n");
71  return AVERROR(ENOMEM);
72  }
73  if (!sr_context->model_filename){
74  av_log(context, AV_LOG_ERROR, "model file for network was not specified\n");
75  return AVERROR(EIO);
76  }
77  else{
78  if (!sr_context->dnn_module->load_model) {
79  av_log(context, AV_LOG_ERROR, "load_model for network was not specified\n");
80  return AVERROR(EIO);
81  } else {
82  sr_context->model = (sr_context->dnn_module->load_model)(sr_context->model_filename);
83  }
84  }
85  if (!sr_context->model){
86  av_log(context, AV_LOG_ERROR, "could not load DNN model\n");
87  return AVERROR(EIO);
88  }
89 
90  sr_context->sws_contexts[0] = NULL;
91  sr_context->sws_contexts[1] = NULL;
92  sr_context->sws_contexts[2] = NULL;
93 
94  return 0;
95 }
96 
97 static int query_formats(AVFilterContext *context)
98 {
102  AVFilterFormats *formats_list;
103 
104  formats_list = ff_make_format_list(pixel_formats);
105  if (!formats_list){
106  av_log(context, AV_LOG_ERROR, "could not create formats list\n");
107  return AVERROR(ENOMEM);
108  }
109 
110  return ff_set_common_formats(context, formats_list);
111 }
112 
113 static int config_props(AVFilterLink *inlink)
114 {
115  AVFilterContext *context = inlink->dst;
116  SRContext *sr_context = context->priv;
117  AVFilterLink *outlink = context->outputs[0];
118  DNNReturnType result;
119  int sws_src_h, sws_src_w, sws_dst_h, sws_dst_w;
120 
121  sr_context->input.width = inlink->w * sr_context->scale_factor;
122  sr_context->input.height = inlink->h * sr_context->scale_factor;
123  sr_context->input.channels = 1;
124 
125  result = (sr_context->model->set_input_output)(sr_context->model->model, &sr_context->input, &sr_context->output);
126  if (result != DNN_SUCCESS){
127  av_log(context, AV_LOG_ERROR, "could not set input and output for the model\n");
128  return AVERROR(EIO);
129  }
130  else{
131  if (sr_context->input.height != sr_context->output.height || sr_context->input.width != sr_context->output.width){
132  sr_context->input.width = inlink->w;
133  sr_context->input.height = inlink->h;
134  result = (sr_context->model->set_input_output)(sr_context->model->model, &sr_context->input, &sr_context->output);
135  if (result != DNN_SUCCESS){
136  av_log(context, AV_LOG_ERROR, "could not set input and output for the model\n");
137  return AVERROR(EIO);
138  }
139  sr_context->scale_factor = 0;
140  }
141  outlink->h = sr_context->output.height;
142  outlink->w = sr_context->output.width;
143  sr_context->sws_contexts[1] = sws_getContext(sr_context->input.width, sr_context->input.height, AV_PIX_FMT_GRAY8,
144  sr_context->input.width, sr_context->input.height, AV_PIX_FMT_GRAYF32,
145  0, NULL, NULL, NULL);
146  sr_context->sws_input_linesize = sr_context->input.width << 2;
147  sr_context->sws_contexts[2] = sws_getContext(sr_context->output.width, sr_context->output.height, AV_PIX_FMT_GRAYF32,
148  sr_context->output.width, sr_context->output.height, AV_PIX_FMT_GRAY8,
149  0, NULL, NULL, NULL);
150  sr_context->sws_output_linesize = sr_context->output.width << 2;
151  if (!sr_context->sws_contexts[1] || !sr_context->sws_contexts[2]){
152  av_log(context, AV_LOG_ERROR, "could not create SwsContext for conversions\n");
153  return AVERROR(ENOMEM);
154  }
155  if (sr_context->scale_factor){
156  sr_context->sws_contexts[0] = sws_getContext(inlink->w, inlink->h, inlink->format,
157  outlink->w, outlink->h, outlink->format,
159  if (!sr_context->sws_contexts[0]){
160  av_log(context, AV_LOG_ERROR, "could not create SwsContext for scaling\n");
161  return AVERROR(ENOMEM);
162  }
163  sr_context->sws_slice_h = inlink->h;
164  }
165  else{
166  if (inlink->format != AV_PIX_FMT_GRAY8){
167  sws_src_h = sr_context->input.height;
168  sws_src_w = sr_context->input.width;
169  sws_dst_h = sr_context->output.height;
170  sws_dst_w = sr_context->output.width;
171 
172  switch (inlink->format){
173  case AV_PIX_FMT_YUV420P:
174  sws_src_h = AV_CEIL_RSHIFT(sws_src_h, 1);
175  sws_src_w = AV_CEIL_RSHIFT(sws_src_w, 1);
176  sws_dst_h = AV_CEIL_RSHIFT(sws_dst_h, 1);
177  sws_dst_w = AV_CEIL_RSHIFT(sws_dst_w, 1);
178  break;
179  case AV_PIX_FMT_YUV422P:
180  sws_src_w = AV_CEIL_RSHIFT(sws_src_w, 1);
181  sws_dst_w = AV_CEIL_RSHIFT(sws_dst_w, 1);
182  break;
183  case AV_PIX_FMT_YUV444P:
184  break;
185  case AV_PIX_FMT_YUV410P:
186  sws_src_h = AV_CEIL_RSHIFT(sws_src_h, 2);
187  sws_src_w = AV_CEIL_RSHIFT(sws_src_w, 2);
188  sws_dst_h = AV_CEIL_RSHIFT(sws_dst_h, 2);
189  sws_dst_w = AV_CEIL_RSHIFT(sws_dst_w, 2);
190  break;
191  case AV_PIX_FMT_YUV411P:
192  sws_src_w = AV_CEIL_RSHIFT(sws_src_w, 2);
193  sws_dst_w = AV_CEIL_RSHIFT(sws_dst_w, 2);
194  break;
195  default:
196  av_log(context, AV_LOG_ERROR, "could not create SwsContext for scaling for given input pixel format");
197  return AVERROR(EIO);
198  }
199  sr_context->sws_contexts[0] = sws_getContext(sws_src_w, sws_src_h, AV_PIX_FMT_GRAY8,
200  sws_dst_w, sws_dst_h, AV_PIX_FMT_GRAY8,
202  if (!sr_context->sws_contexts[0]){
203  av_log(context, AV_LOG_ERROR, "could not create SwsContext for scaling\n");
204  return AVERROR(ENOMEM);
205  }
206  sr_context->sws_slice_h = sws_src_h;
207  }
208  }
209 
210  return 0;
211  }
212 }
213 
214 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
215 {
216  AVFilterContext *context = inlink->dst;
217  SRContext *sr_context = context->priv;
218  AVFilterLink *outlink = context->outputs[0];
219  AVFrame *out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
220  DNNReturnType dnn_result;
221 
222  if (!out){
223  av_log(context, AV_LOG_ERROR, "could not allocate memory for output frame\n");
224  av_frame_free(&in);
225  return AVERROR(ENOMEM);
226  }
227  av_frame_copy_props(out, in);
228  out->height = sr_context->output.height;
229  out->width = sr_context->output.width;
230  if (sr_context->scale_factor){
231  sws_scale(sr_context->sws_contexts[0], (const uint8_t **)in->data, in->linesize,
232  0, sr_context->sws_slice_h, out->data, out->linesize);
233 
234  sws_scale(sr_context->sws_contexts[1], (const uint8_t **)out->data, out->linesize,
235  0, out->height, (uint8_t * const*)(&sr_context->input.data),
236  (const int [4]){sr_context->sws_input_linesize, 0, 0, 0});
237  }
238  else{
239  if (sr_context->sws_contexts[0]){
240  sws_scale(sr_context->sws_contexts[0], (const uint8_t **)(in->data + 1), in->linesize + 1,
241  0, sr_context->sws_slice_h, out->data + 1, out->linesize + 1);
242  sws_scale(sr_context->sws_contexts[0], (const uint8_t **)(in->data + 2), in->linesize + 2,
243  0, sr_context->sws_slice_h, out->data + 2, out->linesize + 2);
244  }
245 
246  sws_scale(sr_context->sws_contexts[1], (const uint8_t **)in->data, in->linesize,
247  0, in->height, (uint8_t * const*)(&sr_context->input.data),
248  (const int [4]){sr_context->sws_input_linesize, 0, 0, 0});
249  }
250  av_frame_free(&in);
251 
252  dnn_result = (sr_context->dnn_module->execute_model)(sr_context->model);
253  if (dnn_result != DNN_SUCCESS){
254  av_log(context, AV_LOG_ERROR, "failed to execute loaded model\n");
255  return AVERROR(EIO);
256  }
257 
258  sws_scale(sr_context->sws_contexts[2], (const uint8_t *[4]){(const uint8_t *)sr_context->output.data, 0, 0, 0},
259  (const int[4]){sr_context->sws_output_linesize, 0, 0, 0},
260  0, out->height, (uint8_t * const*)out->data, out->linesize);
261 
262  return ff_filter_frame(outlink, out);
263 }
264 
265 static av_cold void uninit(AVFilterContext *context)
266 {
267  int i;
268  SRContext *sr_context = context->priv;
269 
270  if (sr_context->dnn_module){
271  (sr_context->dnn_module->free_model)(&sr_context->model);
272  av_freep(&sr_context->dnn_module);
273  }
274 
275  for (i = 0; i < 3; ++i){
276  if (sr_context->sws_contexts[i]){
277  sws_freeContext(sr_context->sws_contexts[i]);
278  }
279  }
280 }
281 
282 static const AVFilterPad sr_inputs[] = {
283  {
284  .name = "default",
285  .type = AVMEDIA_TYPE_VIDEO,
286  .config_props = config_props,
287  .filter_frame = filter_frame,
288  },
289  { NULL }
290 };
291 
292 static const AVFilterPad sr_outputs[] = {
293  {
294  .name = "default",
295  .type = AVMEDIA_TYPE_VIDEO,
296  },
297  { NULL }
298 };
299 
301  .name = "sr",
302  .description = NULL_IF_CONFIG_SMALL("Apply DNN-based image super resolution to the input."),
303  .priv_size = sizeof(SRContext),
304  .init = init,
305  .uninit = uninit,
307  .inputs = sr_inputs,
308  .outputs = sr_outputs,
309  .priv_class = &sr_class,
311 };
312 
void * model
Definition: dnn_interface.h:40
#define NULL
Definition: coverity.c:32
Buffered I/O operations.
This structure describes decoded (raw) audio or video data.
Definition: frame.h:226
#define SWS_BICUBIC
Definition: swscale.h:60
int sws_output_linesize
Definition: vf_sr.c:46
AVOption.
Definition: opt.h:246
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_sr.c:214
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
Main libavfilter public API header.
AVFilter ff_vf_sr
Definition: vf_sr.c:300
DNNData input
Definition: vf_sr.c:43
int channels
Definition: dnn_interface.h:35
DNNReturnType(* set_input_output)(void *model, DNNData *input, DNNData *output)
Definition: dnn_interface.h:43
static const AVFilterPad sr_inputs[]
Definition: vf_sr.c:282
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
int sws_input_linesize
Definition: vf_sr.c:46
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
Definition: avfilter.h:125
const char * name
Pad name.
Definition: internal.h:60
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1080
uint8_t
#define av_cold
Definition: attributes.h:82
AVOptions.
DNNModel * model
Definition: vf_sr.c:42
DNNModule * dnn_module
Definition: vf_sr.c:41
struct SwsContext * sws_getContext(int srcW, int srcH, enum AVPixelFormat srcFormat, int dstW, int dstH, enum AVPixelFormat dstFormat, int flags, SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
Allocate and return an SwsContext.
Definition: utils.c:1885
DNNBackendType
Definition: dnn_interface.h:31
external API header
static const AVOption sr_options[]
Definition: vf_sr.c:51
#define av_log(a,...)
A filter pad used for either input or output.
Definition: internal.h:54
int width
Definition: frame.h:284
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
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
int height
Definition: dnn_interface.h:35
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
void * priv
private data for use by the filter
Definition: avfilter.h:353
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:116
static int config_props(AVFilterLink *inlink)
Definition: vf_sr.c:113
DNNData output
Definition: vf_sr.c:43
DNNBackendType backend_type
Definition: vf_sr.c:40
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
DNNModel *(* load_model)(const char *model_filename)
Definition: dnn_interface.h:49
void sws_freeContext(struct SwsContext *swsContext)
Free the swscaler context swsContext.
Definition: utils.c:2305
static int query_formats(AVFilterContext *context)
Definition: vf_sr.c:97
DNN inference engine interface.
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
DNNReturnType
Definition: dnn_interface.h:29
static av_cold void uninit(AVFilterContext *context)
Definition: vf_sr.c:265
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
#define AV_PIX_FMT_GRAYF32
Definition: pixfmt.h:411
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:257
int attribute_align_arg sws_scale(struct SwsContext *c, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dst[], const int dstStride[])
swscale wrapper, so we don't need to export the SwsContext.
Definition: swscale.c:759
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;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);returnNULL;}returnac;}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;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->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);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
#define FLAGS
Definition: vf_sr.c:50
const char * name
Filter name.
Definition: avfilter.h:148
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
DNNModule * ff_get_dnn_module(DNNBackendType backend_type)
Definition: dnn_interface.c:31
void(* free_model)(DNNModel **model)
Definition: dnn_interface.h:53
#define flags(name, subs,...)
Definition: cbs_av1.c:596
int scale_factor
Definition: vf_sr.c:44
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:240
static av_cold int init(AVFilterContext *context)
Definition: vf_sr.c:64
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
Y , 8bpp.
Definition: pixfmt.h:74
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
struct SwsContext * sws_contexts[3]
Definition: vf_sr.c:45
float * data
Definition: dnn_interface.h:34
#define OFFSET(x)
Definition: vf_sr.c:49
A list of supported formats for one end of a filter link.
Definition: formats.h:64
static const AVFilterPad sr_outputs[]
Definition: vf_sr.c:292
An instance of a filter.
Definition: avfilter.h:338
int height
Definition: frame.h:284
char * model_filename
Definition: vf_sr.c:39
FILE * out
Definition: movenc.c:54
int sws_slice_h
Definition: vf_sr.c:46
#define av_freep(p)
internal API functions
AVFILTER_DEFINE_CLASS(sr)
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:654
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58