FFmpeg
vf_cover_rect.c
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1 /*
2  * Copyright (c) 2014-2015 Michael Niedermayer <michaelni@gmx.at>
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (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
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License along
17  * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19  */
20 
21 /**
22  * @todo switch to dualinput
23  */
24 
25 #include "libavutil/avassert.h"
26 #include "libavutil/imgutils.h"
27 #include "libavutil/opt.h"
28 #include "internal.h"
29 
30 #include "lavfutils.h"
31 
32 enum mode {
36 };
37 
38 typedef struct CoverContext {
39  AVClass *class;
40  int mode;
43  int width, height;
44 } CoverContext;
45 
46 #define OFFSET(x) offsetof(CoverContext, x)
47 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
48 static const AVOption cover_rect_options[] = {
49  { "cover", "cover bitmap filename", OFFSET(cover_filename), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = FLAGS },
50  { "mode", "set removal mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64 = MODE_BLUR}, 0, NB_MODES - 1, FLAGS, "mode" },
51  { "cover", "cover area with bitmap", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_COVER}, INT_MIN, INT_MAX, FLAGS, "mode" },
52  { "blur", "blur area", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_BLUR}, INT_MIN, INT_MAX, FLAGS, "mode" },
53  { NULL }
54 };
55 
57 
59 {
60  static const enum AVPixelFormat pix_fmts[] = {
64  };
65 
66  return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
67 }
68 
70 {
71  return 0;
72 }
73 
74 static void cover_rect(CoverContext *cover, AVFrame *in, int offx, int offy)
75 {
76  int x, y, p;
77 
78  for (p = 0; p < 3; p++) {
79  uint8_t *data = in->data[p] + (offx>>!!p) + (offy>>!!p) * in->linesize[p];
80  const uint8_t *src = cover->cover_frame->data[p];
81  int w = AV_CEIL_RSHIFT(cover->cover_frame->width , !!p);
82  int h = AV_CEIL_RSHIFT(cover->cover_frame->height, !!p);
83  for (y = 0; y < h; y++) {
84  for (x = 0; x < w; x++) {
85  data[x] = src[x];
86  }
87  data += in->linesize[p];
88  src += cover->cover_frame->linesize[p];
89  }
90  }
91 }
92 static void blur(CoverContext *cover, AVFrame *in, int offx, int offy)
93 {
94  int x, y, p;
95 
96  for (p=0; p<3; p++) {
97  int ox = offx>>!!p;
98  int oy = offy>>!!p;
99  int stride = in->linesize[p];
100  uint8_t *data = in->data[p] + ox + oy * stride;
101  int w = AV_CEIL_RSHIFT(cover->width , !!p);
102  int h = AV_CEIL_RSHIFT(cover->height, !!p);
103  int iw = AV_CEIL_RSHIFT(in->width , !!p);
104  int ih = AV_CEIL_RSHIFT(in->height, !!p);
105  for (y = 0; y < h; y++) {
106  for (x = 0; x < w; x++) {
107  int c = 0;
108  int s = 0;
109  if (ox) {
110  int scale = 65536 / (x + 1);
111  s += data[-1 + y*stride] * scale;
112  c += scale;
113  }
114  if (oy) {
115  int scale = 65536 / (y + 1);
116  s += data[x - stride] * scale;
117  c += scale;
118  }
119  if (ox + w < iw) {
120  int scale = 65536 / (w - x);
121  s += data[w + y*stride] * scale;
122  c += scale;
123  }
124  if (oy + h < ih) {
125  int scale = 65536 / (h - y);
126  s += data[x + h*stride] * scale;
127  c += scale;
128  }
129  data[x + y*stride] = c ? (s + (c>>1)) / c : 0;
130  }
131  }
132  }
133 }
134 
136 {
137  AVFilterContext *ctx = inlink->dst;
138  CoverContext *cover = ctx->priv;
139  AVDictionaryEntry *ex, *ey, *ew, *eh;
140  int x = -1, y = -1, w = -1, h = -1;
141  char *xendptr = NULL, *yendptr = NULL, *wendptr = NULL, *hendptr = NULL;
142 
143  ex = av_dict_get(in->metadata, "lavfi.rect.x", NULL, AV_DICT_MATCH_CASE);
144  ey = av_dict_get(in->metadata, "lavfi.rect.y", NULL, AV_DICT_MATCH_CASE);
145  ew = av_dict_get(in->metadata, "lavfi.rect.w", NULL, AV_DICT_MATCH_CASE);
146  eh = av_dict_get(in->metadata, "lavfi.rect.h", NULL, AV_DICT_MATCH_CASE);
147  if (ex && ey && ew && eh) {
148  x = strtol(ex->value, &xendptr, 10);
149  y = strtol(ey->value, &yendptr, 10);
150  w = strtol(ew->value, &wendptr, 10);
151  h = strtol(eh->value, &hendptr, 10);
152  }
153 
154  if (!xendptr || *xendptr || !yendptr || *yendptr ||
155  !wendptr || *wendptr || !hendptr || *hendptr
156  ) {
157  return ff_filter_frame(ctx->outputs[0], in);
158  }
159 
160  if (x < 0) {
161  w += x;
162  x = 0;
163  }
164  if (y < 0) {
165  h += y;
166  y = 0;
167  }
168  w = FFMIN(w, in->width - x);
169  h = FFMIN(h, in->height - y);
170 
171  if (w > in->width || h > in->height || w <= 0 || h <= 0)
172  return AVERROR(EINVAL);
173 
174  if (cover->cover_frame) {
175  if (w != cover->cover_frame->width || h != cover->cover_frame->height)
176  return AVERROR(EINVAL);
177  }
178 
179  cover->width = w;
180  cover->height = h;
181 
182  x = av_clip(x, 0, in->width - w);
183  y = av_clip(y, 0, in->height - h);
184 
186 
187  if (cover->mode == MODE_BLUR) {
188  blur (cover, in, x, y);
189  } else {
190  cover_rect(cover, in, x, y);
191  }
192  return ff_filter_frame(ctx->outputs[0], in);
193 }
194 
196 {
197  CoverContext *cover = ctx->priv;
198 
199  if (cover->cover_frame)
200  av_freep(&cover->cover_frame->data[0]);
201  av_frame_free(&cover->cover_frame);
202 }
203 
205 {
206  CoverContext *cover = ctx->priv;
207  int ret;
208 
209  if (cover->mode == MODE_COVER) {
210  if (!cover->cover_filename) {
211  av_log(ctx, AV_LOG_ERROR, "cover filename not set\n");
212  return AVERROR(EINVAL);
213  }
214 
215  cover->cover_frame = av_frame_alloc();
216  if (!cover->cover_frame)
217  return AVERROR(ENOMEM);
218 
219  if ((ret = ff_load_image(cover->cover_frame->data, cover->cover_frame->linesize,
220  &cover->cover_frame->width, &cover->cover_frame->height,
221  &cover->cover_frame->format, cover->cover_filename, ctx)) < 0)
222  return ret;
223 
225  av_log(ctx, AV_LOG_ERROR, "cover image is not a YUV420 image\n");
226  return AVERROR(EINVAL);
227  }
228  }
229 
230  return 0;
231 }
232 
233 static const AVFilterPad cover_rect_inputs[] = {
234  {
235  .name = "default",
236  .type = AVMEDIA_TYPE_VIDEO,
237  .config_props = config_input,
238  .filter_frame = filter_frame,
239  },
240  { NULL }
241 };
242 
243 static const AVFilterPad cover_rect_outputs[] = {
244  {
245  .name = "default",
246  .type = AVMEDIA_TYPE_VIDEO,
247  },
248  { NULL }
249 };
250 
252  .name = "cover_rect",
253  .description = NULL_IF_CONFIG_SMALL("Find and cover a user specified object."),
254  .priv_size = sizeof(CoverContext),
255  .init = init,
256  .uninit = uninit,
258  .inputs = cover_rect_inputs,
259  .outputs = cover_rect_outputs,
260  .priv_class = &cover_rect_class,
261 };
#define NULL
Definition: coverity.c:32
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
AVOption.
Definition: opt.h:246
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
misc image utilities
AVFrame * cover_frame
Definition: vf_cover_rect.c:42
static int query_formats(AVFilterContext *ctx)
Definition: vf_cover_rect.c:58
static int config_input(AVFilterLink *inlink)
Definition: vf_cover_rect.c:69
#define src
Definition: vp8dsp.c:254
static av_cold int init(AVFilterContext *ctx)
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
const char * name
Pad name.
Definition: internal.h:60
AVFilter ff_vf_cover_rect
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
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:189
AVOptions.
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
AVDictionary * metadata
metadata.
Definition: frame.h:581
#define av_log(a,...)
A filter pad used for either input or output.
Definition: internal.h:54
int width
Definition: frame.h:353
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AV_DICT_MATCH_CASE
Only get an entry with exact-case key match.
Definition: dict.h:69
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
static void blur(CoverContext *cover, AVFrame *in, int offx, int offy)
Definition: vf_cover_rect.c:92
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
simple assert() macros that are a bit more flexible than ISO C assert().
#define FFMIN(a, b)
Definition: common.h:96
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
static void cover_rect(CoverContext *cover, AVFrame *in, int offx, int offy)
Definition: vf_cover_rect.c:74
uint8_t w
Definition: llviddspenc.c:38
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
int ff_load_image(uint8_t *data[4], int linesize[4], int *w, int *h, enum AVPixelFormat *pix_fmt, const char *filename, void *log_ctx)
Load image from filename and put the resulting image in data.
Definition: lavfutils.c:24
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
static av_cold void uninit(AVFilterContext *ctx)
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:368
static const AVFilterPad cover_rect_outputs[]
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:326
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
static const AVOption cover_rect_options[]
Definition: vf_cover_rect.c:48
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:144
#define OFFSET(x)
Definition: vf_cover_rect.c:46
const char * name
Filter name.
Definition: avfilter.h:148
AVFILTER_DEFINE_CLASS(cover_rect)
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
int av_frame_make_writable(AVFrame *frame)
Ensure that the frame data is writable, avoiding data copy if possible.
Definition: frame.c:611
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
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
static const AVFilterPad cover_rect_inputs[]
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:104
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
char * value
Definition: dict.h:87
#define FLAGS
Definition: vf_cover_rect.c:47
An instance of a filter.
Definition: avfilter.h:338
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
int height
Definition: frame.h:353
#define av_freep(p)
char * cover_filename
Definition: vf_cover_rect.c:41
#define stride
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
mode
Use these values in ebur128_init (or&#39;ed).
Definition: ebur128.h:83
Miscellaneous utilities which make use of the libavformat library.
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58