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 
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,
260  .priv_class = &cover_rect_class,
261 };
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_cover_rect.c:58
stride
int stride
Definition: mace.c:144
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
av_clip
#define av_clip
Definition: common.h:122
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:286
CoverContext::cover_frame
AVFrame * cover_frame
Definition: vf_cover_rect.c:42
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1094
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
CoverContext::height
int height
Definition: vf_cover_rect.c:43
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:204
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:324
av_frame_make_writable
int av_frame_make_writable(AVFrame *frame)
Ensure that the frame data is writable, avoiding data copy if possible.
Definition: frame.c:612
AVFrame::width
int width
Definition: frame.h:382
w
uint8_t w
Definition: llviddspenc.c:39
AVOption
AVOption.
Definition: opt.h:248
data
const char data[16]
Definition: mxf.c:142
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:149
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:338
cover_rect_outputs
static const AVFilterPad cover_rect_outputs[]
Definition: vf_cover_rect.c:243
OFFSET
#define OFFSET(x)
Definition: vf_cover_rect.c:46
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:191
avassert.h
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
av_cold
#define av_cold
Definition: attributes.h:90
cover_rect_inputs
static const AVFilterPad cover_rect_inputs[]
Definition: vf_cover_rect.c:233
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
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:587
av_dict_get
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
s
#define s(width, name)
Definition: cbs_vp9.c:257
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
NB_MODES
@ NB_MODES
Definition: vf_cover_rect.c:35
outputs
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:303
ctx
AVFormatContext * ctx
Definition: movenc.c:48
ff_vf_cover_rect
AVFilter ff_vf_cover_rect
Definition: vf_cover_rect.c:251
cover_rect
static void cover_rect(CoverContext *cover, AVFrame *in, int offx, int offy)
Definition: vf_cover_rect.c:74
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
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
NULL
#define NULL
Definition: coverity.c:32
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
src
#define src
Definition: vp8dsp.c:255
c
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
CoverContext::cover_filename
char * cover_filename
Definition: vf_cover_rect.c:41
blur
static void blur(CoverContext *cover, AVFrame *in, int offx, int offy)
Definition: vf_cover_rect.c:92
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:117
ff_load_image
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:25
AVFrame::format
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames,...
Definition: frame.h:397
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_cover_rect.c:195
FFMIN
#define FFMIN(a, b)
Definition: common.h:105
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_cover_rect.c:69
internal.h
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
MODE_BLUR
@ MODE_BLUR
Definition: vf_cover_rect.c:34
uint8_t
uint8_t
Definition: audio_convert.c:194
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
AVFilter
Filter definition.
Definition: avfilter.h:145
CoverContext
Definition: vf_cover_rect.c:38
ret
ret
Definition: filter_design.txt:187
AV_DICT_MATCH_CASE
#define AV_DICT_MATCH_CASE
Only get an entry with exact-case key match.
Definition: dict.h:69
AVFrame::height
int height
Definition: frame.h:382
MODE_COVER
@ MODE_COVER
Definition: vf_cover_rect.c:33
CoverContext::width
int width
Definition: vf_cover_rect.c:43
mode
mode
Definition: ebur128.h:83
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_cover_rect.c:204
lavfutils.h
AVFilterContext
An instance of a filter.
Definition: avfilter.h:341
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(cover_rect)
AVDictionaryEntry
Definition: dict.h:81
CoverContext::mode
int mode
Definition: vf_cover_rect.c:40
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
imgutils.h
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:355
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
FLAGS
#define FLAGS
Definition: vf_cover_rect.c:47
h
h
Definition: vp9dsp_template.c:2038
AVDictionaryEntry::value
char * value
Definition: dict.h:83
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_cover_rect.c:135
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
cover_rect_options
static const AVOption cover_rect_options[]
Definition: vf_cover_rect.c:48