FFmpeg
vf_epx.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include "libavutil/opt.h"
20 #include "libavutil/avassert.h"
21 #include "libavutil/pixdesc.h"
22 #include "internal.h"
23 
24 typedef struct EPXContext {
25  const AVClass *class;
26 
27  int n;
28 
29  int (*epx_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
30 } EPXContext;
31 
32 typedef struct ThreadData {
33  AVFrame *in, *out;
34 } ThreadData;
35 
36 #define OFFSET(x) offsetof(EPXContext, x)
37 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
38 static const AVOption epx_options[] = {
39  { "n", "set scale factor", OFFSET(n), AV_OPT_TYPE_INT, {.i64 = 3}, 2, 3, .flags = FLAGS },
40  { NULL }
41 };
42 
44 
45 static int epx2_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
46 {
47  ThreadData *td = arg;
48  const AVFrame *in = td->in;
49  AVFrame *out = td->out;
50  const int slice_start = (in->height * jobnr ) / nb_jobs;
51  const int slice_end = (in->height * (jobnr+1)) / nb_jobs;
52 
53  for (int p = 0; p < 1; p++) {
54  const int width = in->width;
55  const int height = in->height;
56  const int src_linesize = in->linesize[p] / 4;
57  const int dst_linesize = out->linesize[p] / 4;
58  const uint32_t *src = (const uint32_t *)in->data[p];
59  uint32_t *dst = (uint32_t *)out->data[p];
60  const uint32_t *src_line[3];
61 
62  src_line[0] = src + src_linesize * FFMAX(slice_start - 1, 0);
63  src_line[1] = src + src_linesize * slice_start;
64  src_line[2] = src + src_linesize * FFMIN(slice_start + 1, height-1);
65 
66  for (int y = slice_start; y < slice_end; y++) {
67  uint32_t *dst_line[2];
68 
69  dst_line[0] = dst + dst_linesize*2*y;
70  dst_line[1] = dst + dst_linesize*(2*y+1);
71 
72  for (int x = 0; x < width; x++) {
73  uint32_t E0, E1, E2, E3;
74  uint32_t B, D, E, F, H;
75 
76  B = src_line[0][x];
77  D = src_line[1][FFMAX(x-1, 0)];
78  E = src_line[1][x];
79  F = src_line[1][FFMIN(x+1, width - 1)];
80  H = src_line[2][x];
81 
82  if (B != H && D != F) {
83  E0 = D == B ? D : E;
84  E1 = B == F ? F : E;
85  E2 = D == H ? D : E;
86  E3 = H == F ? F : E;
87  } else {
88  E0 = E;
89  E1 = E;
90  E2 = E;
91  E3 = E;
92  }
93 
94  dst_line[0][x*2] = E0;
95  dst_line[0][x*2+1] = E1;
96  dst_line[1][x*2] = E2;
97  dst_line[1][x*2+1] = E3;
98  }
99 
100  src_line[0] = src_line[1];
101  src_line[1] = src_line[2];
102  src_line[2] = src_line[1];
103 
104  if (y < height - 1)
105  src_line[2] += src_linesize;
106  }
107  }
108 
109  return 0;
110 }
111 
112 static int epx3_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
113 {
114  ThreadData *td = arg;
115  const AVFrame *in = td->in;
116  AVFrame *out = td->out;
117  const int slice_start = (in->height * jobnr ) / nb_jobs;
118  const int slice_end = (in->height * (jobnr+1)) / nb_jobs;
119 
120  for (int p = 0; p < 1; p++) {
121  const int width = in->width;
122  const int height = in->height;
123  const int src_linesize = in->linesize[p] / 4;
124  const int dst_linesize = out->linesize[p] / 4;
125  const uint32_t *src = (const uint32_t *)in->data[p];
126  uint32_t *dst = (uint32_t *)out->data[p];
127  const uint32_t *src_line[3];
128 
129  src_line[0] = src + src_linesize * FFMAX(slice_start - 1, 0);
130  src_line[1] = src + src_linesize * slice_start;
131  src_line[2] = src + src_linesize * FFMIN(slice_start + 1, height-1);
132 
133  for (int y = slice_start; y < slice_end; y++) {
134  uint32_t *dst_line[3];
135 
136  dst_line[0] = dst + dst_linesize*3*y;
137  dst_line[1] = dst + dst_linesize*(3*y+1);
138  dst_line[2] = dst + dst_linesize*(3*y+2);
139 
140  for (int x = 0; x < width; x++) {
141  uint32_t E0, E1, E2, E3, E4, E5, E6, E7, E8;
142  uint32_t A, B, C, D, E, F, G, H, I;
143 
144  A = src_line[0][FFMAX(x-1, 0)];
145  B = src_line[0][x];
146  C = src_line[0][FFMIN(x+1, width - 1)];
147  D = src_line[1][FFMAX(x-1, 0)];
148  E = src_line[1][x];
149  F = src_line[1][FFMIN(x+1, width - 1)];
150  G = src_line[2][FFMAX(x-1, 0)];
151  H = src_line[2][x];
152  I = src_line[2][FFMIN(x+1, width - 1)];
153 
154  if (B != H && D != F) {
155  E0 = D == B ? D : E;
156  E1 = (D == B && E != C) || (B == F && E != A) ? B : E;
157  E2 = B == F ? F : E;
158  E3 = (D == B && E != G) || (D == H && E != A) ? D : E;
159  E4 = E;
160  E5 = (B == F && E != I) || (H == F && E != C) ? F : E;
161  E6 = D == H ? D : E;
162  E7 = (D == H && E != I) || (H == F && E != G) ? H : E;
163  E8 = H == F ? F : E;
164  } else {
165  E0 = E;
166  E1 = E;
167  E2 = E;
168  E3 = E;
169  E4 = E;
170  E5 = E;
171  E6 = E;
172  E7 = E;
173  E8 = E;
174  }
175 
176  dst_line[0][x*3] = E0;
177  dst_line[0][x*3+1] = E1;
178  dst_line[0][x*3+2] = E2;
179  dst_line[1][x*3] = E3;
180  dst_line[1][x*3+1] = E4;
181  dst_line[1][x*3+2] = E5;
182  dst_line[2][x*3] = E6;
183  dst_line[2][x*3+1] = E7;
184  dst_line[2][x*3+2] = E8;
185  }
186 
187  src_line[0] = src_line[1];
188  src_line[1] = src_line[2];
189  src_line[2] = src_line[1];
190 
191  if (y < height - 1)
192  src_line[2] += src_linesize;
193  }
194  }
195 
196  return 0;
197 }
198 
199 static int config_output(AVFilterLink *outlink)
200 {
201  AVFilterContext *ctx = outlink->src;
202  EPXContext *s = ctx->priv;
203  AVFilterLink *inlink = ctx->inputs[0];
204  const AVPixFmtDescriptor *desc;
205 
206  desc = av_pix_fmt_desc_get(outlink->format);
207  if (!desc)
208  return AVERROR_BUG;
209 
210  outlink->w = inlink->w * s->n;
211  outlink->h = inlink->h * s->n;
212 
213  switch (s->n) {
214  case 2:
215  s->epx_slice = epx2_slice;
216  break;
217  case 3:
218  s->epx_slice = epx3_slice;
219  break;
220  }
221 
222  return 0;
223 }
224 
226 {
227  static const enum AVPixelFormat pix_fmts[] = {
230  };
231 
232  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
233  if (!fmts_list)
234  return AVERROR(ENOMEM);
235  return ff_set_common_formats(ctx, fmts_list);
236 }
237 
239 {
240  AVFilterContext *ctx = inlink->dst;
241  AVFilterLink *outlink = ctx->outputs[0];
242  EPXContext *s = ctx->priv;
243  ThreadData td;
244 
245  AVFrame *out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
246  if (!out) {
247  av_frame_free(&in);
248  return AVERROR(ENOMEM);
249  }
250 
251  av_frame_copy_props(out, in);
252 
253  td.in = in, td.out = out;
254  ctx->internal->execute(ctx, s->epx_slice, &td, NULL, FFMIN(inlink->h, ff_filter_get_nb_threads(ctx)));
255 
256  av_frame_free(&in);
257  return ff_filter_frame(outlink, out);
258 }
259 
260 static const AVFilterPad inputs[] = {
261  {
262  .name = "default",
263  .type = AVMEDIA_TYPE_VIDEO,
264  .filter_frame = filter_frame,
265  },
266  { NULL }
267 };
268 
269 static const AVFilterPad outputs[] = {
270  {
271  .name = "default",
272  .type = AVMEDIA_TYPE_VIDEO,
273  .config_props = config_output,
274  },
275  { NULL }
276 };
277 
279  .name = "epx",
280  .description = NULL_IF_CONFIG_SMALL("Scale the input using EPX algorithm."),
281  .inputs = inputs,
282  .outputs = outputs,
283  .query_formats = query_formats,
284  .priv_size = sizeof(EPXContext),
285  .priv_class = &epx_class,
287 };
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_epx.c:238
#define NULL
Definition: coverity.c:32
AVFrame * out
Definition: af_adeclick.c:502
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
AVOption.
Definition: opt.h:248
const char * desc
Definition: libsvtav1.c:79
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
static int epx3_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_epx.c:112
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:287
#define E1(x)
Definition: mem_internal.h:103
const char * name
Pad name.
Definition: internal.h:60
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:349
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1094
AVOptions.
static const AVOption epx_options[]
Definition: vf_epx.c:38
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:94
#define height
static const AVFilterPad outputs[]
Definition: vf_epx.c:269
#define E4(a, b)
Definition: indeo3data.h:251
#define A(x)
Definition: vp56_arith.h:28
A filter pad used for either input or output.
Definition: internal.h:54
#define src
Definition: vp8dsp.c:255
int width
Definition: frame.h:376
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:588
#define td
Definition: regdef.h:70
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:204
#define B
Definition: huffyuvdsp.h:32
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:117
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:95
void * priv
private data for use by the filter
Definition: avfilter.h:356
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:117
int(* epx_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_epx.c:29
const char * arg
Definition: jacosubdec.c:66
AVFilter ff_vf_epx
Definition: vf_epx.c:278
static int query_formats(AVFilterContext *ctx)
Definition: vf_epx.c:225
simple assert() macros that are a bit more flexible than ISO C assert().
int n
Definition: vf_epx.c:27
#define FFMAX(a, b)
Definition: common.h:103
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:92
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
#define E
Definition: avdct.c:32
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:802
#define FFMIN(a, b)
Definition: common.h:105
#define OFFSET(x)
Definition: vf_epx.c:36
#define width
static int epx2_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_epx.c:45
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
static int config_output(AVFilterLink *outlink)
Definition: vf_epx.c:199
s EdgeDetect Foobar g libavfilter vf_edgedetect c libavfilter vf_foobar c edit libavfilter and add an entry for foobar following the pattern of the other filters edit libavfilter allfilters and add an entry for foobar following the pattern of the other filters configure make j< whatever > ffmpeg ffmpeg i you should get a foobar png with Lena edge detected That s your new playground is ready Some little details about what s going which in turn will define variables for the build system and the C
AVFILTER_DEFINE_CLASS(epx)
Used for passing data between threads.
Definition: dsddec.c:67
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:349
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
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
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:145
static const AVFilterPad inputs[]
Definition: vf_epx.c:260
const char * name
Filter name.
Definition: avfilter.h:149
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:353
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:303
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:381
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:332
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
int
#define E2(a, b)
Expand a pair of delta values (a,b) into two/four delta entries.
Definition: indeo3data.h:250
#define G
Definition: huffyuvdsp.h:33
D(D(float, sse)
Definition: rematrix_init.c:28
avfilter_execute_func * execute
Definition: internal.h:136
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2033
#define F(x)
#define H
Definition: pixlet.c:39
A list of supported formats for one end of a filter link.
Definition: formats.h:65
An instance of a filter.
Definition: avfilter.h:341
int height
Definition: frame.h:376
FILE * out
Definition: movenc.c:54
AVFrame * in
Definition: af_adenorm.c:223
internal API functions
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
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
#define FLAGS
Definition: vf_epx.c:37
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:659