FFmpeg
vf_swaprect.c
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1 /*
2  * Copyright (c) 2015 Paul B. Mahol
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 #include "libavutil/avstring.h"
22 #include "libavutil/eval.h"
23 #include "libavutil/imgutils.h"
24 #include "libavutil/opt.h"
25 
26 #include "avfilter.h"
27 #include "formats.h"
28 #include "internal.h"
29 #include "video.h"
30 
31 typedef struct SwapRectContext {
32  const AVClass *class;
33  char *w, *h;
34  char *x1, *y1;
35  char *x2, *y2;
36 
37  int nb_planes;
38  int pixsteps[4];
39 
40  const AVPixFmtDescriptor *desc;
41  uint8_t *temp;
42 } SwapRectContext;
43 
44 #define OFFSET(x) offsetof(SwapRectContext, x)
45 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
46 static const AVOption swaprect_options[] = {
47  { "w", "set rect width", OFFSET(w), AV_OPT_TYPE_STRING, {.str="w/2"}, 0, 0, .flags = FLAGS },
48  { "h", "set rect height", OFFSET(h), AV_OPT_TYPE_STRING, {.str="h/2"}, 0, 0, .flags = FLAGS },
49  { "x1", "set 1st rect x top left coordinate", OFFSET(x1), AV_OPT_TYPE_STRING, {.str="w/2"}, 0, 0, .flags = FLAGS },
50  { "y1", "set 1st rect y top left coordinate", OFFSET(y1), AV_OPT_TYPE_STRING, {.str="h/2"}, 0, 0, .flags = FLAGS },
51  { "x2", "set 2nd rect x top left coordinate", OFFSET(x2), AV_OPT_TYPE_STRING, {.str="0"}, 0, 0, .flags = FLAGS },
52  { "y2", "set 2nd rect y top left coordinate", OFFSET(y2), AV_OPT_TYPE_STRING, {.str="0"}, 0, 0, .flags = FLAGS },
53  { NULL },
54 };
55 
56 AVFILTER_DEFINE_CLASS(swaprect);
57 
58 static int query_formats(AVFilterContext *ctx)
59 {
60  int reject_flags = AV_PIX_FMT_FLAG_PAL |
61  AV_PIX_FMT_FLAG_HWACCEL |
62  AV_PIX_FMT_FLAG_BITSTREAM;
63 
64  return ff_set_common_formats(ctx, ff_formats_pixdesc_filter(0, reject_flags));
65 }
66 
67 static const char *const var_names[] = { "w", "h", "a", "n", "t",
68 #if FF_API_FRAME_PKT
69  "pos",
70 #endif
71  "sar", "dar", NULL };
72 enum { VAR_W, VAR_H, VAR_A, VAR_N, VAR_T,
73 #if FF_API_FRAME_PKT
74  VAR_POS,
75 #endif
76  VAR_SAR, VAR_DAR, VAR_VARS_NB };
77 
78 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
79 {
80  AVFilterContext *ctx = inlink->dst;
81  AVFilterLink *outlink = ctx->outputs[0];
82  SwapRectContext *s = ctx->priv;
83  double var_values[VAR_VARS_NB];
84  int x1[4], y1[4];
85  int x2[4], y2[4];
86  int aw[4], ah[4];
87  int lw[4], lh[4];
88  int pw[4], ph[4];
89  double dw, dh;
90  double dx1, dy1;
91  double dx2, dy2;
92  int y, p, w, h, ret;
93 
94  var_values[VAR_W] = inlink->w;
95  var_values[VAR_H] = inlink->h;
96  var_values[VAR_A] = (float) inlink->w / inlink->h;
97  var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ? av_q2d(inlink->sample_aspect_ratio) : 1;
98  var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR];
99  var_values[VAR_N] = inlink->frame_count_out;
100  var_values[VAR_T] = in->pts == AV_NOPTS_VALUE ? NAN : in->pts * av_q2d(inlink->time_base);
101 #if FF_API_FRAME_PKT
102 FF_DISABLE_DEPRECATION_WARNINGS
103  var_values[VAR_POS] = in->pkt_pos == -1 ? NAN : in->pkt_pos;
104 FF_ENABLE_DEPRECATION_WARNINGS
105 #endif
106 
107  ret = av_expr_parse_and_eval(&dw, s->w,
108  var_names, &var_values[0],
109  NULL, NULL, NULL, NULL,
110  0, 0, ctx);
111  if (ret < 0)
112  return ret;
113 
114  ret = av_expr_parse_and_eval(&dh, s->h,
115  var_names, &var_values[0],
116  NULL, NULL, NULL, NULL,
117  0, 0, ctx);
118  if (ret < 0)
119  return ret;
120 
121  ret = av_expr_parse_and_eval(&dx1, s->x1,
122  var_names, &var_values[0],
123  NULL, NULL, NULL, NULL,
124  0, 0, ctx);
125  if (ret < 0)
126  return ret;
127 
128  ret = av_expr_parse_and_eval(&dy1, s->y1,
129  var_names, &var_values[0],
130  NULL, NULL, NULL, NULL,
131  0, 0, ctx);
132  if (ret < 0)
133  return ret;
134 
135  ret = av_expr_parse_and_eval(&dx2, s->x2,
136  var_names, &var_values[0],
137  NULL, NULL, NULL, NULL,
138  0, 0, ctx);
139  if (ret < 0)
140  return ret;
141 
142  ret = av_expr_parse_and_eval(&dy2, s->y2,
143  var_names, &var_values[0],
144  NULL, NULL, NULL, NULL,
145  0, 0, ctx);
146  if (ret < 0)
147  return ret;
148 
149  w = dw; h = dh; x1[0] = dx1; y1[0] = dy1; x2[0] = dx2; y2[0] = dy2;
150 
151  x1[0] = av_clip(x1[0], 0, inlink->w - 1);
152  y1[0] = av_clip(y1[0], 0, inlink->w - 1);
153 
154  x2[0] = av_clip(x2[0], 0, inlink->w - 1);
155  y2[0] = av_clip(y2[0], 0, inlink->w - 1);
156 
157  ah[1] = ah[2] = AV_CEIL_RSHIFT(h, s->desc->log2_chroma_h);
158  ah[0] = ah[3] = h;
159  aw[1] = aw[2] = AV_CEIL_RSHIFT(w, s->desc->log2_chroma_w);
160  aw[0] = aw[3] = w;
161 
162  w = FFMIN3(w, inlink->w - x1[0], inlink->w - x2[0]);
163  h = FFMIN3(h, inlink->h - y1[0], inlink->h - y2[0]);
164 
165  ph[1] = ph[2] = AV_CEIL_RSHIFT(h, s->desc->log2_chroma_h);
166  ph[0] = ph[3] = h;
167  pw[1] = pw[2] = AV_CEIL_RSHIFT(w, s->desc->log2_chroma_w);
168  pw[0] = pw[3] = w;
169 
170  lh[1] = lh[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
171  lh[0] = lh[3] = inlink->h;
172  lw[1] = lw[2] = AV_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w);
173  lw[0] = lw[3] = inlink->w;
174 
175  x1[1] = x1[2] = AV_CEIL_RSHIFT(x1[0], s->desc->log2_chroma_w);
176  x1[0] = x1[3] = x1[0];
177  y1[1] = y1[2] = AV_CEIL_RSHIFT(y1[0], s->desc->log2_chroma_h);
178  y1[0] = y1[3] = y1[0];
179 
180  x2[1] = x2[2] = AV_CEIL_RSHIFT(x2[0], s->desc->log2_chroma_w);
181  x2[0] = x2[3] = x2[0];
182  y2[1] = y2[2] = AV_CEIL_RSHIFT(y2[0], s->desc->log2_chroma_h);
183  y2[0] = y2[3] = y2[0];
184 
185  for (p = 0; p < s->nb_planes; p++) {
186  if (ph[p] == ah[p] && pw[p] == aw[p]) {
187  uint8_t *src = in->data[p] + y1[p] * in->linesize[p] + x1[p] * s->pixsteps[p];
188  uint8_t *dst = in->data[p] + y2[p] * in->linesize[p] + x2[p] * s->pixsteps[p];
189 
190  for (y = 0; y < ph[p]; y++) {
191  memcpy(s->temp, src, pw[p] * s->pixsteps[p]);
192  memmove(src, dst, pw[p] * s->pixsteps[p]);
193  memcpy(dst, s->temp, pw[p] * s->pixsteps[p]);
194  src += in->linesize[p];
195  dst += in->linesize[p];
196  }
197  }
198  }
199 
200  return ff_filter_frame(outlink, in);
201 }
202 
203 static int config_input(AVFilterLink *inlink)
204 {
205  AVFilterContext *ctx = inlink->dst;
206  SwapRectContext *s = ctx->priv;
207 
208  if (!s->w || !s->h ||
209  !s->x1 || !s->y1 ||
210  !s->x2 || !s->y2)
211  return AVERROR(EINVAL);
212 
213  s->desc = av_pix_fmt_desc_get(inlink->format);
214  av_image_fill_max_pixsteps(s->pixsteps, NULL, s->desc);
215  s->nb_planes = av_pix_fmt_count_planes(inlink->format);
216 
217  s->temp = av_malloc_array(inlink->w, s->pixsteps[0]);
218  if (!s->temp)
219  return AVERROR(ENOMEM);
220 
221  return 0;
222 }
223 
224 static av_cold void uninit(AVFilterContext *ctx)
225 {
226  SwapRectContext *s = ctx->priv;
227  av_freep(&s->temp);
228 }
229 
230 static const AVFilterPad inputs[] = {
231  {
232  .name = "default",
233  .type = AVMEDIA_TYPE_VIDEO,
234  .flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE,
235  .filter_frame = filter_frame,
236  .config_props = config_input,
237  },
238 };
239 
240 const AVFilter ff_vf_swaprect = {
241  .name = "swaprect",
242  .description = NULL_IF_CONFIG_SMALL("Swap 2 rectangular objects in video."),
243  .priv_size = sizeof(SwapRectContext),
244  .priv_class = &swaprect_class,
245  .uninit = uninit,
246  FILTER_INPUTS(inputs),
247  FILTER_OUTPUTS(ff_video_default_filterpad),
248  FILTER_QUERY_FUNC(query_formats),
249  .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
250  .process_command = ff_filter_process_command,
251 };
FF_ENABLE_DEPRECATION_WARNINGS
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:73
av_clip
#define av_clip
Definition: common.h:96
SwapRectContext::y1
char * y1
Definition: vf_swaprect.c:34
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
FLAGS
#define FLAGS
Definition: vf_swaprect.c:45
SwapRectContext::y2
char * y2
Definition: vf_swaprect.c:35
SwapRectContext::temp
uint8_t * temp
Definition: vf_swaprect.c:41
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:978
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2964
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
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_swaprect.c:224
SwapRectContext::desc
const AVPixFmtDescriptor * desc
Definition: vf_swaprect.c:40
ph
static int FUNC() ph(CodedBitstreamContext *ctx, RWContext *rw, H266RawPH *current)
Definition: cbs_h266_syntax_template.c:2988
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:340
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:452
w
uint8_t w
Definition: llviddspenc.c:38
AVOption
AVOption.
Definition: opt.h:251
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:169
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_swaprect.c:58
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:170
video.h
VAR_W
@ VAR_W
Definition: vf_swaprect.c:72
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:361
formats.h
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:3004
SwapRectContext::pixsteps
int pixsteps[4]
Definition: vf_swaprect.c:38
AV_PIX_FMT_FLAG_HWACCEL
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
Definition: pixdesc.h:128
VAR_A
@ VAR_A
Definition: vf_swaprect.c:72
SwapRectContext
Definition: vf_swaprect.c:31
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:47
ff_vf_swaprect
const AVFilter ff_vf_swaprect
Definition: vf_swaprect.c:240
av_cold
#define av_cold
Definition: attributes.h:90
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:770
ff_video_default_filterpad
const AVFilterPad ff_video_default_filterpad[1]
An AVFilterPad array whose only entry has name "default" and is of type AVMEDIA_TYPE_VIDEO.
Definition: video.c:36
float
float
Definition: af_crystalizer.c:121
s
#define s(width, name)
Definition: cbs_vp9.c:198
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:51
av_q2d
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
ctx
AVFormatContext * ctx
Definition: movenc.c:48
SwapRectContext::x2
char * x2
Definition: vf_swaprect.c:35
SwapRectContext::h
char * h
Definition: vf_swaprect.c:33
NAN
#define NAN
Definition: mathematics.h:115
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:192
VAR_SAR
@ VAR_SAR
Definition: vf_swaprect.c:76
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
VAR_POS
@ VAR_POS
Definition: noise_bsf.c:55
eval.h
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:106
av_expr_parse_and_eval
int av_expr_parse_and_eval(double *d, const char *s, const char *const *const_names, const double *const_values, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), void *opaque, int log_offset, void *log_ctx)
Parse and evaluate an expression.
Definition: eval.c:776
SwapRectContext::w
char * w
Definition: vf_swaprect.c:33
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
VAR_VARS_NB
@ VAR_VARS_NB
Definition: vf_swaprect.c:76
AV_PIX_FMT_FLAG_BITSTREAM
#define AV_PIX_FMT_FLAG_BITSTREAM
All values of a component are bit-wise packed end to end.
Definition: pixdesc.h:124
AVFrame::pkt_pos
attribute_deprecated int64_t pkt_pos
reordered pos from the last AVPacket that has been input into the decoder
Definition: frame.h:687
ff_filter_process_command
int ff_filter_process_command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Generic processing of user supplied commands that are set in the same way as the filter options.
Definition: avfilter.c:851
VAR_DAR
@ VAR_DAR
Definition: vf_swaprect.c:76
SwapRectContext::x1
char * x1
Definition: vf_swaprect.c:34
internal.h
AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
#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:147
ff_formats_pixdesc_filter
AVFilterFormats * ff_formats_pixdesc_filter(unsigned want, unsigned rej)
Construct a formats list containing all pixel formats with certain properties.
Definition: formats.c:519
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(swaprect)
VAR_H
@ VAR_H
Definition: vf_swaprect.c:72
FFMIN3
#define FFMIN3(a, b, c)
Definition: macros.h:50
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:31
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:53
AVFilter
Filter definition.
Definition: avfilter.h:166
ret
ret
Definition: filter_design.txt:187
OFFSET
#define OFFSET(x)
Definition: vf_swaprect.c:44
swaprect_options
static const AVOption swaprect_options[]
Definition: vf_swaprect.c:46
avfilter.h
SwapRectContext::nb_planes
int nb_planes
Definition: vf_swaprect.c:37
av_image_fill_max_pixsteps
void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4], const AVPixFmtDescriptor *pixdesc)
Compute the max pixel step for each plane of an image with a format described by pixdesc.
Definition: imgutils.c:35
AVFilterContext
An instance of a filter.
Definition: avfilter.h:397
FF_DISABLE_DEPRECATION_WARNINGS
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:72
VAR_T
@ VAR_T
Definition: vf_swaprect.c:72
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
var_names
static const char *const var_names[]
Definition: vf_swaprect.c:67
VAR_N
@ VAR_N
Definition: vf_swaprect.c:72
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:193
inputs
static const AVFilterPad inputs[]
Definition: vf_swaprect.c:230
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
imgutils.h
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
Definition: frame.h:385
h
h
Definition: vp9dsp_template.c:2038
avstring.h
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
AV_PIX_FMT_FLAG_PAL
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:120
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_swaprect.c:78
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_swaprect.c:203
AVFILTERPAD_FLAG_NEEDS_WRITABLE
#define AVFILTERPAD_FLAG_NEEDS_WRITABLE
The filter expects writable frames from its input link, duplicating data buffers if needed.
Definition: internal.h:66
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