FFmpeg
vf_zoompan.c
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1 /*
2  * Copyright (c) 2013 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/avassert.h"
22 #include "libavutil/eval.h"
23 #include "libavutil/opt.h"
24 #include "libavutil/pixdesc.h"
25 #include "avfilter.h"
26 #include "filters.h"
27 #include "formats.h"
28 #include "internal.h"
29 #include "video.h"
30 #include "libswscale/swscale.h"
31 
32 static const char *const var_names[] = {
33  "in_w", "iw",
34  "in_h", "ih",
35  "out_w", "ow",
36  "out_h", "oh",
37  "in",
38  "on",
39  "duration",
40  "pduration",
41  "in_time", "it",
42  "out_time", "time", "ot",
43  "frame",
44  "zoom",
45  "pzoom",
46  "x", "px",
47  "y", "py",
48  "a",
49  "sar",
50  "dar",
51  "hsub",
52  "vsub",
53  NULL
54 };
55 
56 enum var_name {
78 };
79 
80 typedef struct ZPcontext {
81  const AVClass *class;
83  char *x_expr_str;
84  char *y_expr_str;
86 
88 
89  int w, h;
90  double x, y;
91  double prev_zoom;
93  struct SwsContext *sws;
94  int64_t frame_count;
98  int nb_frames;
100  int finished;
102 } ZPContext;
103 
104 #define OFFSET(x) offsetof(ZPContext, x)
105 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
106 static const AVOption zoompan_options[] = {
107  { "zoom", "set the zoom expression", OFFSET(zoom_expr_str), AV_OPT_TYPE_STRING, {.str = "1" }, .flags = FLAGS },
108  { "z", "set the zoom expression", OFFSET(zoom_expr_str), AV_OPT_TYPE_STRING, {.str = "1" }, .flags = FLAGS },
109  { "x", "set the x expression", OFFSET(x_expr_str), AV_OPT_TYPE_STRING, {.str="0"}, .flags = FLAGS },
110  { "y", "set the y expression", OFFSET(y_expr_str), AV_OPT_TYPE_STRING, {.str="0"}, .flags = FLAGS },
111  { "d", "set the duration expression", OFFSET(duration_expr_str), AV_OPT_TYPE_STRING, {.str="90"}, .flags = FLAGS },
112  { "s", "set the output image size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="hd720"}, .flags = FLAGS },
113  { "fps", "set the output framerate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, { .str = "25" }, 0, INT_MAX, .flags = FLAGS },
114  { NULL }
115 };
116 
117 AVFILTER_DEFINE_CLASS(zoompan);
118 
120 {
121  ZPContext *s = ctx->priv;
122 
123  s->prev_zoom = 1;
124  return 0;
125 }
126 
127 static int config_output(AVFilterLink *outlink)
128 {
129  AVFilterContext *ctx = outlink->src;
130  ZPContext *s = ctx->priv;
131  int ret;
132 
133  outlink->w = s->w;
134  outlink->h = s->h;
135  outlink->time_base = av_inv_q(s->framerate);
136  outlink->frame_rate = s->framerate;
137  s->desc = av_pix_fmt_desc_get(outlink->format);
138  s->finished = 1;
139 
140  ret = av_expr_parse(&s->zoom_expr, s->zoom_expr_str, var_names, NULL, NULL, NULL, NULL, 0, ctx);
141  if (ret < 0)
142  return ret;
143 
144  ret = av_expr_parse(&s->x_expr, s->x_expr_str, var_names, NULL, NULL, NULL, NULL, 0, ctx);
145  if (ret < 0)
146  return ret;
147 
148  ret = av_expr_parse(&s->y_expr, s->y_expr_str, var_names, NULL, NULL, NULL, NULL, 0, ctx);
149  if (ret < 0)
150  return ret;
151 
152  return 0;
153 }
154 
155 static int output_single_frame(AVFilterContext *ctx, AVFrame *in, double *var_values, int i,
156  double *zoom, double *dx, double *dy)
157 {
158  ZPContext *s = ctx->priv;
159  AVFilterLink *outlink = ctx->outputs[0];
160  AVFilterLink *inlink = ctx->inputs[0];
161  int64_t pts = s->frame_count;
162  int k, x, y, w, h, ret = 0;
163  uint8_t *input[4];
164  int px[4], py[4];
165  AVFrame *out;
166 
167  var_values[VAR_PX] = s->x;
168  var_values[VAR_PY] = s->y;
169  var_values[VAR_PZOOM] = s->prev_zoom;
170  var_values[VAR_PDURATION] = s->prev_nb_frames;
171  var_values[VAR_IN_TIME] = var_values[VAR_IT] = in->pts == AV_NOPTS_VALUE ?
172  NAN : in->pts * av_q2d(inlink->time_base);
173  var_values[VAR_OUT_TIME] = pts * av_q2d(outlink->time_base);
174  var_values[VAR_TIME] = var_values[VAR_OT] = var_values[VAR_OUT_TIME];
175  var_values[VAR_FRAME] = i;
176  var_values[VAR_ON] = outlink->frame_count_in;
177 
178  *zoom = av_expr_eval(s->zoom_expr, var_values, NULL);
179 
180  *zoom = av_clipd(*zoom, 1, 10);
181  var_values[VAR_ZOOM] = *zoom;
182  w = in->width * (1.0 / *zoom);
183  h = in->height * (1.0 / *zoom);
184 
185  *dx = av_expr_eval(s->x_expr, var_values, NULL);
186 
187  x = *dx = av_clipd(*dx, 0, FFMAX(in->width - w, 0));
188  var_values[VAR_X] = *dx;
189  x &= ~((1 << s->desc->log2_chroma_w) - 1);
190 
191  *dy = av_expr_eval(s->y_expr, var_values, NULL);
192 
193  y = *dy = av_clipd(*dy, 0, FFMAX(in->height - h, 0));
194  var_values[VAR_Y] = *dy;
195  y &= ~((1 << s->desc->log2_chroma_h) - 1);
196 
197  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
198  if (!out) {
199  ret = AVERROR(ENOMEM);
200  return ret;
201  }
202 
203  px[1] = px[2] = AV_CEIL_RSHIFT(x, s->desc->log2_chroma_w);
204  px[0] = px[3] = x;
205 
206  py[1] = py[2] = AV_CEIL_RSHIFT(y, s->desc->log2_chroma_h);
207  py[0] = py[3] = y;
208 
209  s->sws = sws_alloc_context();
210  if (!s->sws) {
211  ret = AVERROR(ENOMEM);
212  goto error;
213  }
214 
215  for (k = 0; in->data[k]; k++)
216  input[k] = in->data[k] + py[k] * in->linesize[k] + px[k];
217 
218  av_opt_set_int(s->sws, "srcw", w, 0);
219  av_opt_set_int(s->sws, "srch", h, 0);
220  av_opt_set_int(s->sws, "src_format", in->format, 0);
221  av_opt_set_int(s->sws, "dstw", outlink->w, 0);
222  av_opt_set_int(s->sws, "dsth", outlink->h, 0);
223  av_opt_set_int(s->sws, "dst_format", outlink->format, 0);
224  av_opt_set_int(s->sws, "sws_flags", SWS_BICUBIC, 0);
225 
226  if ((ret = sws_init_context(s->sws, NULL, NULL)) < 0)
227  goto error;
228 
229  sws_scale(s->sws, (const uint8_t *const *)&input, in->linesize, 0, h, out->data, out->linesize);
230 
231  out->pts = pts;
232  s->frame_count++;
233 
234  ret = ff_filter_frame(outlink, out);
235  sws_freeContext(s->sws);
236  s->sws = NULL;
237  s->current_frame++;
238 
239  if (s->current_frame >= s->nb_frames) {
240  if (*dx != -1)
241  s->x = *dx;
242  if (*dy != -1)
243  s->y = *dy;
244  if (*zoom != -1)
245  s->prev_zoom = *zoom;
246  s->prev_nb_frames = s->nb_frames;
247  s->nb_frames = 0;
248  s->current_frame = 0;
249  av_frame_free(&s->in);
250  s->finished = 1;
251  }
252  return ret;
253 error:
254  sws_freeContext(s->sws);
255  s->sws = NULL;
256  av_frame_free(&out);
257  return ret;
258 }
259 
261 {
262  ZPContext *s = ctx->priv;
263  AVFilterLink *inlink = ctx->inputs[0];
264  AVFilterLink *outlink = ctx->outputs[0];
265  int status, ret = 0;
266  int64_t pts;
267 
269 
270  if (s->in && ff_outlink_frame_wanted(outlink)) {
271  double zoom = -1, dx = -1, dy = -1;
272 
273  ret = output_single_frame(ctx, s->in, s->var_values, s->current_frame,
274  &zoom, &dx, &dy);
275  if (ret < 0)
276  return ret;
277  }
278 
279  if (!s->in && (ret = ff_inlink_consume_frame(inlink, &s->in)) > 0) {
280  double zoom = -1, dx = -1, dy = -1, nb_frames;
281 
282  s->finished = 0;
283  s->var_values[VAR_IN_W] = s->var_values[VAR_IW] = s->in->width;
284  s->var_values[VAR_IN_H] = s->var_values[VAR_IH] = s->in->height;
285  s->var_values[VAR_OUT_W] = s->var_values[VAR_OW] = s->w;
286  s->var_values[VAR_OUT_H] = s->var_values[VAR_OH] = s->h;
287  s->var_values[VAR_IN] = inlink->frame_count_out - 1;
288  s->var_values[VAR_ON] = outlink->frame_count_in;
289  s->var_values[VAR_PX] = s->x;
290  s->var_values[VAR_PY] = s->y;
291  s->var_values[VAR_X] = 0;
292  s->var_values[VAR_Y] = 0;
293  s->var_values[VAR_PZOOM] = s->prev_zoom;
294  s->var_values[VAR_ZOOM] = 1;
295  s->var_values[VAR_PDURATION] = s->prev_nb_frames;
296  s->var_values[VAR_A] = (double) s->in->width / s->in->height;
297  s->var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ?
298  (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
299  s->var_values[VAR_DAR] = s->var_values[VAR_A] * s->var_values[VAR_SAR];
300  s->var_values[VAR_HSUB] = 1 << s->desc->log2_chroma_w;
301  s->var_values[VAR_VSUB] = 1 << s->desc->log2_chroma_h;
302 
303  if ((ret = av_expr_parse_and_eval(&nb_frames, s->duration_expr_str,
304  var_names, s->var_values,
305  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0) {
306  av_frame_free(&s->in);
307  return ret;
308  }
309 
310  s->var_values[VAR_DURATION] = s->nb_frames = nb_frames;
311 
312  ret = output_single_frame(ctx, s->in, s->var_values, s->current_frame,
313  &zoom, &dx, &dy);
314  if (ret < 0)
315  return ret;
316  }
317  if (ret < 0) {
318  return ret;
319  } else if (s->finished && ff_inlink_acknowledge_status(inlink, &status, &pts)) {
320  ff_outlink_set_status(outlink, status, pts);
321  return 0;
322  } else {
323  if (ff_outlink_frame_wanted(outlink) && s->finished)
325  return 0;
326  }
327 }
328 
330 {
331  static const enum AVPixelFormat pix_fmts[] = {
343  };
344 
346  if (!fmts_list)
347  return AVERROR(ENOMEM);
348  return ff_set_common_formats(ctx, fmts_list);
349 }
350 
352 {
353  ZPContext *s = ctx->priv;
354 
355  sws_freeContext(s->sws);
356  s->sws = NULL;
357  av_expr_free(s->x_expr);
358  av_expr_free(s->y_expr);
359  av_expr_free(s->zoom_expr);
360  av_frame_free(&s->in);
361 }
362 
363 static const AVFilterPad inputs[] = {
364  {
365  .name = "default",
366  .type = AVMEDIA_TYPE_VIDEO,
367  },
368  { NULL }
369 };
370 
371 static const AVFilterPad outputs[] = {
372  {
373  .name = "default",
374  .type = AVMEDIA_TYPE_VIDEO,
375  .config_props = config_output,
376  },
377  { NULL }
378 };
379 
381  .name = "zoompan",
382  .description = NULL_IF_CONFIG_SMALL("Apply Zoom & Pan effect."),
383  .priv_size = sizeof(ZPContext),
384  .priv_class = &zoompan_class,
385  .init = init,
386  .uninit = uninit,
388  .activate = activate,
389  .inputs = inputs,
390  .outputs = outputs,
391 };
error
static void error(const char *err)
Definition: target_bsf_fuzzer.c:30
ff_get_video_buffer
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
inputs
static const AVFilterPad inputs[]
Definition: vf_zoompan.c:363
ZPcontext::current_frame
int current_frame
Definition: vf_zoompan.c:99
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
status
they must not be accessed directly The fifo field contains the frames that are queued in the input for processing by the filter The status_in and status_out fields contains the queued status(EOF or error) of the link
ZPcontext::y_expr
AVExpr * y_expr
Definition: vf_zoompan.c:87
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
VAR_ZOOM
@ VAR_ZOOM
Definition: vf_zoompan.c:68
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:286
VAR_OUT_TIME
@ VAR_OUT_TIME
Definition: vf_zoompan.c:66
VAR_ON
@ VAR_ON
Definition: vf_zoompan.c:62
out
FILE * out
Definition: movenc.c:54
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:2541
VAR_IN
@ VAR_IN
Definition: vf_zoompan.c:61
AV_OPT_TYPE_VIDEO_RATE
@ AV_OPT_TYPE_VIDEO_RATE
offset must point to AVRational
Definition: opt.h:238
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
VAR_PZOOM
@ VAR_PZOOM
Definition: vf_zoompan.c:69
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:111
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
pixdesc.h
VAR_IH
@ VAR_IH
Definition: vf_zoompan.c:58
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:396
AVFrame::width
int width
Definition: frame.h:361
w
uint8_t w
Definition: llviddspenc.c:39
AVOption
AVOption.
Definition: opt.h:248
VAR_TIME
@ VAR_TIME
Definition: vf_zoompan.c:66
VAR_IW
@ VAR_IW
Definition: vf_zoompan.c:57
AV_PIX_FMT_YUV440P
@ AV_PIX_FMT_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
sws_scale
int attribute_align_arg sws_scale(struct SwsContext *c, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dst[], const int dstStride[])
swscale wrapper, so we don't need to export the SwsContext.
Definition: swscale.c:745
ZPcontext
Definition: vf_zoompan.c:80
ZPcontext::desc
const AVPixFmtDescriptor * desc
Definition: vf_zoompan.c:95
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:149
outputs
static const AVFilterPad outputs[]
Definition: vf_zoompan.c:371
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(zoompan)
VAR_VSUB
@ VAR_VSUB
Definition: vf_zoompan.c:76
video.h
FF_FILTER_FORWARD_STATUS_BACK
#define FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink)
Forward the status on an output link to an input link.
Definition: filters.h:199
VAR_OH
@ VAR_OH
Definition: vf_zoompan.c:60
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:317
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:65
formats.h
av_expr_parse
int av_expr_parse(AVExpr **expr, const char *s, const char *const *const_names, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), int log_offset, void *log_ctx)
Parse an expression.
Definition: eval.c:685
VAR_PY
@ VAR_PY
Definition: vf_zoompan.c:71
VARS_NB
@ VARS_NB
Definition: vf_zoompan.c:77
framerate
int framerate
Definition: h264_levels.c:65
ff_inlink_consume_frame
int ff_inlink_consume_frame(AVFilterLink *link, AVFrame **rframe)
Take a frame from the link's FIFO and update the link's stats.
Definition: avfilter.c:1376
VAR_A
@ VAR_A
Definition: vf_zoompan.c:72
AV_PIX_FMT_GBRAP
@ AV_PIX_FMT_GBRAP
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:205
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_zoompan.c:119
VAR_IN_H
@ VAR_IN_H
Definition: vf_zoompan.c:58
pts
static int64_t pts
Definition: transcode_aac.c:652
av_expr_free
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:336
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
AV_PIX_FMT_YUVJ411P
@ AV_PIX_FMT_YUVJ411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
Definition: pixfmt.h:248
VAR_DURATION
@ VAR_DURATION
Definition: vf_zoompan.c:63
avassert.h
ZPcontext::nb_frames
int nb_frames
Definition: vf_zoompan.c:98
av_cold
#define av_cold
Definition: attributes.h:90
var_name
var_name
Definition: setts_bsf.c:50
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:580
ZPcontext::x_expr_str
char * x_expr_str
Definition: vf_zoompan.c:83
VAR_PX
@ VAR_PX
Definition: vf_zoompan.c:70
AV_PIX_FMT_YUVJ422P
@ AV_PIX_FMT_YUVJ422P
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:79
ZPcontext::y
double y
Definition: vf_zoompan.c:90
ff_outlink_set_status
static void ff_outlink_set_status(AVFilterLink *link, int status, int64_t pts)
Set the status field of a link from the source filter.
Definition: filters.h:189
ff_inlink_request_frame
void ff_inlink_request_frame(AVFilterLink *link)
Mark that a frame is wanted on the link.
Definition: avfilter.c:1502
s
#define s(width, name)
Definition: cbs_vp9.c:257
AV_PIX_FMT_YUVA420P
@ AV_PIX_FMT_YUVA420P
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
activate
static int activate(AVFilterContext *ctx)
Definition: vf_zoompan.c:260
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
ZPcontext::finished
int finished
Definition: vf_zoompan.c:100
av_q2d
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
VAR_SAR
@ VAR_SAR
Definition: vf_zoompan.c:73
ZPcontext::var_values
double var_values[VARS_NB]
Definition: vf_zoompan.c:97
filters.h
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:290
ctx
AVFormatContext * ctx
Definition: movenc.c:48
av_expr_eval
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:766
AVExpr
Definition: eval.c:157
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
NAN
#define NAN
Definition: mathematics.h:64
VAR_IN_W
@ VAR_IN_W
Definition: vf_zoompan.c:57
AV_PIX_FMT_YUVJ444P
@ AV_PIX_FMT_YUVJ444P
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:80
VAR_Y
@ VAR_Y
Definition: vf_zoompan.c:71
ZPcontext::frame_count
int64_t frame_count
Definition: vf_zoompan.c:94
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
ZPcontext::framerate
AVRational framerate
Definition: vf_zoompan.c:101
NULL
#define NULL
Definition: coverity.c:32
output_single_frame
static int output_single_frame(AVFilterContext *ctx, AVFrame *in, double *var_values, int i, double *zoom, double *dx, double *dy)
Definition: vf_zoompan.c:155
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
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
AV_OPT_TYPE_IMAGE_SIZE
@ AV_OPT_TYPE_IMAGE_SIZE
offset must point to two consecutive integers
Definition: opt.h:235
VAR_OUT_H
@ VAR_OUT_H
Definition: vf_zoompan.c:60
sws_alloc_context
struct SwsContext * sws_alloc_context(void)
Allocate an empty SwsContext.
Definition: utils.c:1086
zoompan_options
static const AVOption zoompan_options[]
Definition: vf_zoompan.c:106
ZPcontext::x_expr
AVExpr * x_expr
Definition: vf_zoompan.c:87
ZPcontext::prev_zoom
double prev_zoom
Definition: vf_zoompan.c:91
ZPcontext::in
AVFrame * in
Definition: vf_zoompan.c:96
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
ff_inlink_acknowledge_status
int ff_inlink_acknowledge_status(AVFilterLink *link, int *rstatus, int64_t *rpts)
Test and acknowledge the change of status on the link.
Definition: avfilter.c:1331
FLAGS
#define FLAGS
Definition: vf_zoompan.c:105
av_opt_set_int
int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
Definition: opt.c:586
VAR_FRAME
@ VAR_FRAME
Definition: vf_zoompan.c:67
eval.h
var_names
static const char *const var_names[]
Definition: vf_zoompan.c:32
ZPcontext::zoom_expr
AVExpr * zoom_expr
Definition: vf_zoompan.c:87
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
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
av_clipd
#define av_clipd
Definition: common.h:173
FFMAX
#define FFMAX(a, b)
Definition: common.h:103
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
VAR_OW
@ VAR_OW
Definition: vf_zoompan.c:59
AVFrame::format
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames,...
Definition: frame.h:376
AV_PIX_FMT_YUVA444P
@ AV_PIX_FMT_YUVA444P
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:167
VAR_X
@ VAR_X
Definition: vf_zoompan.c:70
input
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some input
Definition: filter_design.txt:172
VAR_OUT_W
@ VAR_OUT_W
Definition: vf_zoompan.c:59
internal.h
i
int i
Definition: input.c:407
AV_PIX_FMT_YUVJ440P
@ AV_PIX_FMT_YUVJ440P
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range
Definition: pixfmt.h:100
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_zoompan.c:329
av_inv_q
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
ZPcontext::sws
struct SwsContext * sws
Definition: vf_zoompan.c:93
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
ff_vf_zoompan
const AVFilter ff_vf_zoompan
Definition: vf_zoompan.c:380
AVFilter
Filter definition.
Definition: avfilter.h:145
VAR_HSUB
@ VAR_HSUB
Definition: vf_zoompan.c:75
ret
ret
Definition: filter_design.txt:187
ZPcontext::duration_expr_str
char * duration_expr_str
Definition: vf_zoompan.c:85
sws_init_context
av_warn_unused_result int sws_init_context(struct SwsContext *sws_context, SwsFilter *srcFilter, SwsFilter *dstFilter)
Initialize the swscaler context sws_context.
Definition: utils.c:1172
AVFrame::height
int height
Definition: frame.h:361
sws_freeContext
void sws_freeContext(struct SwsContext *swsContext)
Free the swscaler context swsContext.
Definition: utils.c:2241
VAR_IN_TIME
@ VAR_IN_TIME
Definition: vf_zoompan.c:65
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
avfilter.h
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_zoompan.c:127
AV_PIX_FMT_YUV444P
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
AVFilterContext
An instance of a filter.
Definition: avfilter.h:333
OFFSET
#define OFFSET(x)
Definition: vf_zoompan.c:104
AV_PIX_FMT_GBRP
@ AV_PIX_FMT_GBRP
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:158
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_PIX_FMT_YUV422P
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
VAR_IT
@ VAR_IT
Definition: vf_zoompan.c:65
ZPcontext::prev_nb_frames
int prev_nb_frames
Definition: vf_zoompan.c:92
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:70
ZPcontext::h
int h
Definition: vf_zoompan.c:89
AV_PIX_FMT_YUV411P
@ AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
ZPcontext::y_expr_str
char * y_expr_str
Definition: vf_zoompan.c:84
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:334
AV_PIX_FMT_YUV410P
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_zoompan.c:351
VAR_PDURATION
@ VAR_PDURATION
Definition: vf_zoompan.c:64
h
h
Definition: vp9dsp_template.c:2038
ff_outlink_frame_wanted
the definition of that something depends on the semantic of the filter The callback must examine the status of the filter s links and proceed accordingly The status of output links is stored in the status_in and status_out fields and tested by the ff_outlink_frame_wanted() function. If this function returns true
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
ZPcontext::zoom_expr_str
char * zoom_expr_str
Definition: vf_zoompan.c:82
VAR_OT
@ VAR_OT
Definition: vf_zoompan.c:66
SwsContext
Definition: swscale_internal.h:283
ZPcontext::x
double x
Definition: vf_zoompan.c:90
SWS_BICUBIC
#define SWS_BICUBIC
Definition: swscale.h:60
swscale.h
AV_PIX_FMT_YUVA422P
@ AV_PIX_FMT_YUVA422P
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:166
ZPcontext::w
int w
Definition: vf_zoompan.c:89
VAR_DAR
@ VAR_DAR
Definition: vf_zoompan.c:74