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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 #include "libavutil/pixdesc.h"
26 
27 #include "avfilter.h"
28 #include "formats.h"
29 #include "internal.h"
30 #include "video.h"
31 
32 typedef struct SwapRectContext {
33  const AVClass *class;
34  char *w, *h;
35  char *x1, *y1;
36  char *x2, *y2;
37 
38  int nb_planes;
39  int pixsteps[4];
40 
44 
45 #define OFFSET(x) offsetof(SwapRectContext, x)
46 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
47 static const AVOption swaprect_options[] = {
48  { "w", "set rect width", OFFSET(w), AV_OPT_TYPE_STRING, {.str="w/2"}, 0, 0, .flags = FLAGS },
49  { "h", "set rect height", OFFSET(h), AV_OPT_TYPE_STRING, {.str="h/2"}, 0, 0, .flags = FLAGS },
50  { "x1", "set 1st rect x top left coordinate", OFFSET(x1), AV_OPT_TYPE_STRING, {.str="w/2"}, 0, 0, .flags = FLAGS },
51  { "y1", "set 1st rect y top left coordinate", OFFSET(y1), AV_OPT_TYPE_STRING, {.str="h/2"}, 0, 0, .flags = FLAGS },
52  { "x2", "set 2nd rect x top left coordinate", OFFSET(x2), AV_OPT_TYPE_STRING, {.str="0"}, 0, 0, .flags = FLAGS },
53  { "y2", "set 2nd rect y top left coordinate", OFFSET(y2), AV_OPT_TYPE_STRING, {.str="0"}, 0, 0, .flags = FLAGS },
54  { NULL },
55 };
56 
57 AVFILTER_DEFINE_CLASS(swaprect);
58 
60 {
62  int fmt, ret;
63 
64  for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
65  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
66  if (!(desc->flags & AV_PIX_FMT_FLAG_PAL ||
69  (ret = ff_add_format(&pix_fmts, fmt)) < 0)
70  return ret;
71  }
72 
73  return ff_set_common_formats(ctx, pix_fmts);
74 }
75 
76 static const char *const var_names[] = { "w", "h", "a", "n", "t", "pos", "sar", "dar", NULL };
78 
79 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
80 {
81  AVFilterContext *ctx = inlink->dst;
82  AVFilterLink *outlink = ctx->outputs[0];
83  SwapRectContext *s = ctx->priv;
84  double var_values[VAR_VARS_NB];
85  int x1[4], y1[4];
86  int x2[4], y2[4];
87  int aw[4], ah[4];
88  int lw[4], lh[4];
89  int pw[4], ph[4];
90  double dw, dh;
91  double dx1, dy1;
92  double dx2, dy2;
93  int y, p, w, h, ret;
94 
95  var_values[VAR_W] = inlink->w;
96  var_values[VAR_H] = inlink->h;
97  var_values[VAR_A] = (float) inlink->w / inlink->h;
98  var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ? av_q2d(inlink->sample_aspect_ratio) : 1;
99  var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR];
100  var_values[VAR_N] = inlink->frame_count;
101  var_values[VAR_T] = in->pts == AV_NOPTS_VALUE ? NAN : in->pts * av_q2d(inlink->time_base);
102  var_values[VAR_POS] = av_frame_get_pkt_pos(in) == -1 ? NAN : av_frame_get_pkt_pos(in);
103 
104  ret = av_expr_parse_and_eval(&dw, s->w,
105  var_names, &var_values[0],
106  NULL, NULL, NULL, NULL,
107  0, 0, ctx);
108  if (ret < 0)
109  return ret;
110 
111  ret = av_expr_parse_and_eval(&dh, s->h,
112  var_names, &var_values[0],
113  NULL, NULL, NULL, NULL,
114  0, 0, ctx);
115  if (ret < 0)
116  return ret;
117 
118  ret = av_expr_parse_and_eval(&dx1, s->x1,
119  var_names, &var_values[0],
120  NULL, NULL, NULL, NULL,
121  0, 0, ctx);
122  if (ret < 0)
123  return ret;
124 
125  ret = av_expr_parse_and_eval(&dy1, s->y1,
126  var_names, &var_values[0],
127  NULL, NULL, NULL, NULL,
128  0, 0, ctx);
129  if (ret < 0)
130  return ret;
131 
132  ret = av_expr_parse_and_eval(&dx2, s->x2,
133  var_names, &var_values[0],
134  NULL, NULL, NULL, NULL,
135  0, 0, ctx);
136  if (ret < 0)
137  return ret;
138 
139  ret = av_expr_parse_and_eval(&dy2, s->y2,
140  var_names, &var_values[0],
141  NULL, NULL, NULL, NULL,
142  0, 0, ctx);
143  if (ret < 0)
144  return ret;
145 
146  w = dw; h = dh; x1[0] = dx1; y1[0] = dy1; x2[0] = dx2; y2[0] = dy2;
147 
148  x1[0] = av_clip(x1[0], 0, inlink->w - 1);
149  y1[0] = av_clip(y1[0], 0, inlink->w - 1);
150 
151  x2[0] = av_clip(x2[0], 0, inlink->w - 1);
152  y2[0] = av_clip(y2[0], 0, inlink->w - 1);
153 
154  ah[1] = ah[2] = FF_CEIL_RSHIFT(h, s->desc->log2_chroma_h);
155  ah[0] = ah[3] = h;
156  aw[1] = aw[2] = FF_CEIL_RSHIFT(w, s->desc->log2_chroma_w);
157  aw[0] = aw[3] = w;
158 
159  w = FFMIN3(w, inlink->w - x1[0], inlink->w - x2[0]);
160  h = FFMIN3(h, inlink->h - y1[0], inlink->h - y2[0]);
161 
162  ph[1] = ph[2] = FF_CEIL_RSHIFT(h, s->desc->log2_chroma_h);
163  ph[0] = ph[3] = h;
164  pw[1] = pw[2] = FF_CEIL_RSHIFT(w, s->desc->log2_chroma_w);
165  pw[0] = pw[3] = w;
166 
167  lh[1] = lh[2] = FF_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
168  lh[0] = lh[3] = inlink->h;
169  lw[1] = lw[2] = FF_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w);
170  lw[0] = lw[3] = inlink->w;
171 
172  x1[1] = x1[2] = FF_CEIL_RSHIFT(x1[0], s->desc->log2_chroma_w);
173  x1[0] = x1[3] = x1[0];
174  y1[1] = y1[2] = FF_CEIL_RSHIFT(y1[0], s->desc->log2_chroma_h);
175  y1[0] = y1[3] = y1[0];
176 
177  x2[1] = x2[2] = FF_CEIL_RSHIFT(x2[0], s->desc->log2_chroma_w);
178  x2[0] = x2[3] = x2[0];
179  y2[1] = y2[2] = FF_CEIL_RSHIFT(y2[0], s->desc->log2_chroma_h);
180  y2[0] = y2[3] = y2[0];
181 
182  for (p = 0; p < s->nb_planes; p++) {
183  if (ph[p] == ah[p] && pw[p] == aw[p]) {
184  uint8_t *src = in->data[p] + y1[p] * in->linesize[p] + x1[p] * s->pixsteps[p];
185  uint8_t *dst = in->data[p] + y2[p] * in->linesize[p] + x2[p] * s->pixsteps[p];
186 
187  for (y = 0; y < ph[p]; y++) {
188  memcpy(s->temp, src, pw[p] * s->pixsteps[p]);
189  memmove(src, dst, pw[p] * s->pixsteps[p]);
190  memcpy(dst, s->temp, pw[p] * s->pixsteps[p]);
191  src += in->linesize[p];
192  dst += in->linesize[p];
193  }
194  }
195  }
196 
197  return ff_filter_frame(outlink, in);
198 }
199 
200 static int config_input(AVFilterLink *inlink)
201 {
202  AVFilterContext *ctx = inlink->dst;
203  SwapRectContext *s = ctx->priv;
204 
205  if (!s->w || !s->h ||
206  !s->x1 || !s->y1 ||
207  !s->x2 || !s->y2)
208  return AVERROR(EINVAL);
209 
210  s->desc = av_pix_fmt_desc_get(inlink->format);
213 
214  s->temp = av_malloc_array(inlink->w, s->pixsteps[0]);
215  if (!s->temp)
216  return AVERROR(ENOMEM);
217 
218  return 0;
219 }
220 
222 {
223  SwapRectContext *s = ctx->priv;
224  av_freep(&s->temp);
225 }
226 
227 static const AVFilterPad inputs[] = {
228  {
229  .name = "default",
230  .type = AVMEDIA_TYPE_VIDEO,
231  .filter_frame = filter_frame,
232  .config_props = config_input,
233  .needs_writable = 1,
234  },
235  { NULL }
236 };
237 
238 static const AVFilterPad outputs[] = {
239  {
240  .name = "default",
241  .type = AVMEDIA_TYPE_VIDEO,
242  },
243  { NULL }
244 };
245 
247  .name = "swaprect",
248  .description = NULL_IF_CONFIG_SMALL("Swap 2 rectangular objects in video."),
249  .priv_size = sizeof(SwapRectContext),
250  .priv_class = &swaprect_class,
252  .uninit = uninit,
253  .inputs = inputs,
254  .outputs = outputs,
256 };
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:132
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2157
This structure describes decoded (raw) audio or video data.
Definition: frame.h:181
AVOption.
Definition: opt.h:245
AVFormatContext * ctx
Definition: movenc-test.c:48
const char * fmt
Definition: avisynth_c.h:632
misc image utilities
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2197
Main libavfilter public API header.
uint8_t * temp
Definition: vf_swaprect.c:42
int num
numerator
Definition: rational.h:44
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
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:34
#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:122
const char * name
Pad name.
Definition: internal.h:59
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1163
uint8_t
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_swaprect.c:79
#define av_cold
Definition: attributes.h:82
AVOptions.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:262
static double av_q2d(AVRational a)
Convert rational to double.
Definition: rational.h:80
#define FLAGS
Definition: vf_swaprect.c:46
#define FFMIN3(a, b, c)
Definition: common.h:97
static const AVFilterPad outputs[]
Definition: vf_swaprect.c:238
AVFILTER_DEFINE_CLASS(swaprect)
static const AVFilterPad inputs[]
Definition: vf_swaprect.c:227
A filter pad used for either input or output.
Definition: internal.h:53
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_swaprect.c:221
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:722
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
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
#define AVERROR(e)
Definition: error.h:43
#define FF_CEIL_RSHIFT
Definition: common.h:61
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
void * priv
private data for use by the filter
Definition: avfilter.h:319
static const char *const var_names[]
Definition: vf_swaprect.c:76
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
Definition: pixdesc.h:140
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:337
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
static int config_input(AVFilterLink *inlink)
Definition: vf_swaprect.c:200
#define src
Definition: vp9dsp.c:530
static const AVOption swaprect_options[]
Definition: vf_swaprect.c:47
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:209
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
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
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:141
const char * name
Filter name.
Definition: avfilter.h:145
#define AV_PIX_FMT_FLAG_BITSTREAM
All values of a component are bit-wise packed end to end.
Definition: pixdesc.h:136
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:316
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:262
static int flags
Definition: cpu.c:47
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:192
const AVPixFmtDescriptor * desc
Definition: vf_swaprect.c:41
#define NAN
Definition: math.h:28
int64_t av_frame_get_pkt_pos(const AVFrame *frame)
A list of supported formats for one end of a filter link.
Definition: formats.h:64
An instance of a filter.
Definition: avfilter.h:304
#define av_freep(p)
#define av_malloc_array(a, b)
internal API functions
#define OFFSET(x)
Definition: vf_swaprect.c:45
AVFilter ff_vf_swaprect
Definition: vf_swaprect.c:246
static int query_formats(AVFilterContext *ctx)
Definition: vf_swaprect.c:59
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240
simple arithmetic expression evaluator