FFmpeg
vf_telecine.c
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1 /*
2  * Copyright (c) 2012 Rudolf Polzer
3  * Copyright (c) 2013 Paul B Mahol
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file telecine filter, heavily based from mpv-player:TOOLS/vf_dlopen/telecine.c by
24  * Rudolf Polzer.
25  */
26 
27 #include "libavutil/avstring.h"
28 #include "libavutil/imgutils.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/pixdesc.h"
31 #include "avfilter.h"
32 #include "filters.h"
33 #include "formats.h"
34 #include "video.h"
35 
36 typedef struct TelecineContext {
37  const AVClass *class;
39  char *pattern;
40  unsigned int pattern_pos;
42 
45  int out_cnt;
46  int occupied;
47 
48  int nb_planes;
49  int planeheight[4];
50  int stride[4];
51 
55 
56 #define OFFSET(x) offsetof(TelecineContext, x)
57 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
58 
59 static const AVOption telecine_options[] = {
60  {"first_field", "select first field", OFFSET(first_field), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, .unit = "field"},
61  {"top", "select top field first", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "field"},
62  {"t", "select top field first", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "field"},
63  {"bottom", "select bottom field first", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "field"},
64  {"b", "select bottom field first", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "field"},
65  {"pattern", "pattern that describe for how many fields a frame is to be displayed", OFFSET(pattern), AV_OPT_TYPE_STRING, {.str="23"}, 0, 0, FLAGS},
66  {NULL}
67 };
68 
69 AVFILTER_DEFINE_CLASS(telecine);
70 
72 {
73  TelecineContext *s = ctx->priv;
74  const char *p;
75  int max = 0;
76 
77  if (!strlen(s->pattern)) {
78  av_log(ctx, AV_LOG_ERROR, "No pattern provided.\n");
79  return AVERROR_INVALIDDATA;
80  }
81 
82  for (p = s->pattern; *p; p++) {
83  if (!av_isdigit(*p)) {
84  av_log(ctx, AV_LOG_ERROR, "Provided pattern includes non-numeric characters.\n");
85  return AVERROR_INVALIDDATA;
86  }
87 
88  max = FFMAX(*p - '0', max);
89  s->pts.num += 2;
90  s->pts.den += *p - '0';
91  }
92 
93  s->start_time = AV_NOPTS_VALUE;
94 
95  s->out_cnt = (max + 1) / 2;
96  av_log(ctx, AV_LOG_INFO, "Telecine pattern %s yields up to %d frames per frame, pts advance factor: %d/%d\n",
97  s->pattern, s->out_cnt, s->pts.num, s->pts.den);
98 
99  return 0;
100 }
101 
103  AVFilterFormatsConfig **cfg_in,
104  AVFilterFormatsConfig **cfg_out)
105 {
106  int reject_flags = AV_PIX_FMT_FLAG_BITSTREAM |
109 
110  return ff_set_common_formats2(ctx, cfg_in, cfg_out,
111  ff_formats_pixdesc_filter(0, reject_flags));
112 }
113 
115 {
116  TelecineContext *s = inlink->dst->priv;
118  int i, ret;
119 
120  s->temp = ff_get_video_buffer(inlink, inlink->w, inlink->h);
121  if (!s->temp)
122  return AVERROR(ENOMEM);
123  for (i = 0; i < s->out_cnt; i++) {
124  s->frame[i] = ff_get_video_buffer(inlink, inlink->w, inlink->h);
125  if (!s->frame[i])
126  return AVERROR(ENOMEM);
127  }
128 
129  if ((ret = av_image_fill_linesizes(s->stride, inlink->format, inlink->w)) < 0)
130  return ret;
131 
132  s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
133  s->planeheight[0] = s->planeheight[3] = inlink->h;
134 
135  s->nb_planes = av_pix_fmt_count_planes(inlink->format);
136 
137  return 0;
138 }
139 
140 static int config_output(AVFilterLink *outlink)
141 {
142  AVFilterContext *ctx = outlink->src;
143  TelecineContext *s = ctx->priv;
144  AVFilterLink *inlink = ctx->inputs[0];
146  FilterLink *ol = ff_filter_link(outlink);
147  AVRational fps = il->frame_rate;
148 
149  if (!fps.num || !fps.den) {
150  av_log(ctx, AV_LOG_ERROR, "The input needs a constant frame rate; "
151  "current rate of %d/%d is invalid\n", fps.num, fps.den);
152  return AVERROR(EINVAL);
153  }
154  fps = av_mul_q(fps, av_inv_q(s->pts));
155  av_log(ctx, AV_LOG_VERBOSE, "FPS: %d/%d -> %d/%d\n",
156  il->frame_rate.num, il->frame_rate.den, fps.num, fps.den);
157 
158  ol->frame_rate = fps;
159  outlink->time_base = av_mul_q(inlink->time_base, s->pts);
160  av_log(ctx, AV_LOG_VERBOSE, "TB: %d/%d -> %d/%d\n",
161  inlink->time_base.num, inlink->time_base.den, outlink->time_base.num, outlink->time_base.den);
162 
163  s->ts_unit = av_inv_q(av_mul_q(fps, outlink->time_base));
164 
165  return 0;
166 }
167 
168 static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
169 {
170  AVFilterContext *ctx = inlink->dst;
171  AVFilterLink *outlink = ctx->outputs[0];
172  FilterLink *outl = ff_filter_link(outlink);
173  TelecineContext *s = ctx->priv;
174  int i, len, ret = 0, nout = 0;
175 
176  if (s->start_time == AV_NOPTS_VALUE)
177  s->start_time = inpicref->pts;
178 
179  len = s->pattern[s->pattern_pos] - '0';
180 
181  s->pattern_pos++;
182  if (!s->pattern[s->pattern_pos])
183  s->pattern_pos = 0;
184 
185  if (!len) { // do not output any field from this frame
186  av_frame_free(&inpicref);
187  return 0;
188  }
189 
190  if (s->occupied) {
191  ret = ff_inlink_make_frame_writable(inlink, &s->frame[nout]);
192  if (ret < 0) {
193  av_frame_free(&inpicref);
194  return ret;
195  }
196  for (i = 0; i < s->nb_planes; i++) {
197  // fill in the EARLIER field from the buffered pic
198  av_image_copy_plane(s->frame[nout]->data[i] + s->frame[nout]->linesize[i] * s->first_field,
199  s->frame[nout]->linesize[i] * 2,
200  s->temp->data[i] + s->temp->linesize[i] * s->first_field,
201  s->temp->linesize[i] * 2,
202  s->stride[i],
203  (s->planeheight[i] - s->first_field + 1) / 2);
204  // fill in the LATER field from the new pic
205  av_image_copy_plane(s->frame[nout]->data[i] + s->frame[nout]->linesize[i] * !s->first_field,
206  s->frame[nout]->linesize[i] * 2,
207  inpicref->data[i] + inpicref->linesize[i] * !s->first_field,
208  inpicref->linesize[i] * 2,
209  s->stride[i],
210  (s->planeheight[i] - !s->first_field + 1) / 2);
211  }
212 #if FF_API_INTERLACED_FRAME
214  s->frame[nout]->interlaced_frame = 1;
215  s->frame[nout]->top_field_first = !s->first_field;
217 #endif
218  s->frame[nout]->flags |= AV_FRAME_FLAG_INTERLACED;
219  if (s->first_field)
220  s->frame[nout]->flags &= ~AV_FRAME_FLAG_TOP_FIELD_FIRST;
221  else
222  s->frame[nout]->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
223  nout++;
224  len--;
225  s->occupied = 0;
226  }
227 
228  while (len >= 2) {
229  // output THIS image as-is
230  ret = ff_inlink_make_frame_writable(inlink, &s->frame[nout]);
231  if (ret < 0) {
232  av_frame_free(&inpicref);
233  return ret;
234  }
235  for (i = 0; i < s->nb_planes; i++)
236  av_image_copy_plane(s->frame[nout]->data[i], s->frame[nout]->linesize[i],
237  inpicref->data[i], inpicref->linesize[i],
238  s->stride[i],
239  s->planeheight[i]);
240 #if FF_API_INTERLACED_FRAME
242  s->frame[nout]->interlaced_frame = inpicref->interlaced_frame;
243  s->frame[nout]->top_field_first = inpicref->top_field_first;
245 #endif
246  s->frame[nout]->flags |= (inpicref->flags & (AV_FRAME_FLAG_INTERLACED | AV_FRAME_FLAG_TOP_FIELD_FIRST));
247  nout++;
248  len -= 2;
249  }
250 
251  if (len >= 1) {
252  // copy THIS image to the buffer, we need it later
253  for (i = 0; i < s->nb_planes; i++)
254  av_image_copy_plane(s->temp->data[i], s->temp->linesize[i],
255  inpicref->data[i], inpicref->linesize[i],
256  s->stride[i],
257  s->planeheight[i]);
258  s->occupied = 1;
259  }
260 
261  for (i = 0; i < nout; i++) {
262  AVFrame *frame = av_frame_clone(s->frame[i]);
263  int interlaced = frame ? !!(frame->flags & AV_FRAME_FLAG_INTERLACED) : 0;
264  int tff = frame ? !!(frame->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST) : 0;
265 
266  if (!frame) {
267  av_frame_free(&inpicref);
268  return AVERROR(ENOMEM);
269  }
270 
271  av_frame_copy_props(frame, inpicref);
272 #if FF_API_INTERLACED_FRAME
274  frame->interlaced_frame = interlaced;
275  frame->top_field_first = tff;
277 #endif
278  if (interlaced)
280  else
281  frame->flags &= ~AV_FRAME_FLAG_INTERLACED;
282  if (tff)
284  else
286  frame->pts = ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time) +
287  av_rescale(outl->frame_count_in, s->ts_unit.num,
288  s->ts_unit.den);
289  ret = ff_filter_frame(outlink, frame);
290  }
291  av_frame_free(&inpicref);
292 
293  return ret;
294 }
295 
297 {
298  TelecineContext *s = ctx->priv;
299  int i;
300 
301  av_frame_free(&s->temp);
302  for (i = 0; i < s->out_cnt; i++)
303  av_frame_free(&s->frame[i]);
304 }
305 
306 static const AVFilterPad telecine_inputs[] = {
307  {
308  .name = "default",
309  .type = AVMEDIA_TYPE_VIDEO,
310  .filter_frame = filter_frame,
311  .config_props = config_input,
312  },
313 };
314 
315 static const AVFilterPad telecine_outputs[] = {
316  {
317  .name = "default",
318  .type = AVMEDIA_TYPE_VIDEO,
319  .config_props = config_output,
320  },
321 };
322 
324  .name = "telecine",
325  .description = NULL_IF_CONFIG_SMALL("Apply a telecine pattern."),
326  .priv_size = sizeof(TelecineContext),
327  .priv_class = &telecine_class,
328  .init = init,
329  .uninit = uninit,
333 };
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:116
FF_ENABLE_DEPRECATION_WARNINGS
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:73
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
TelecineContext::pattern_pos
unsigned int pattern_pos
Definition: vf_telecine.c:40
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1061
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:3170
ff_set_common_formats2
int ff_set_common_formats2(const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out, AVFilterFormats *formats)
Definition: formats.c:1007
int64_t
long long int64_t
Definition: coverity.c:34
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
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:162
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: filters.h:262
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:389
pixdesc.h
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:501
AVOption
AVOption.
Definition: opt.h:429
TelecineContext::occupied
int occupied
Definition: vf_telecine.c:46
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:225
TelecineContext::temp
AVFrame * temp
Definition: vf_telecine.c:53
max
#define max(a, b)
Definition: cuda_runtime.h:33
AVFrame::flags
int flags
Frame flags, a combination of AV_FRAME_FLAGS.
Definition: frame.h:661
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:205
telecine_options
static const AVOption telecine_options[]
Definition: vf_telecine.c:59
video.h
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:410
av_image_copy_plane
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
Definition: imgutils.c:374
AV_FRAME_FLAG_TOP_FIELD_FIRST
#define AV_FRAME_FLAG_TOP_FIELD_FIRST
A flag to mark frames where the top field is displayed first if the content is interlaced.
Definition: frame.h:653
formats.h
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:3210
AV_PIX_FMT_FLAG_HWACCEL
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
Definition: pixdesc.h:128
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
Definition: vf_telecine.c:168
AVRational::num
int num
Numerator.
Definition: rational.h:59
AVFilterPad
A filter pad used for either input or output.
Definition: filters.h:38
AVFrame::interlaced_frame
attribute_deprecated int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:566
TelecineContext::pattern
char * pattern
Definition: vf_telecine.c:39
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:209
av_cold
#define av_cold
Definition: attributes.h:90
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_telecine.c:296
TelecineContext::stride
int stride[4]
Definition: vf_telecine.c:50
av_image_fill_linesizes
int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
Fill plane linesizes for an image with pixel format pix_fmt and width width.
Definition: imgutils.c:89
TelecineContext::out_cnt
int out_cnt
Definition: vf_telecine.c:45
s
#define s(width, name)
Definition: cbs_vp9.c:198
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:60
telecine_inputs
static const AVFilterPad telecine_inputs[]
Definition: vf_telecine.c:306
filters.h
ctx
AVFormatContext * ctx
Definition: movenc.c:49
av_frame_clone
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:609
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: filters.h:263
ff_inlink_make_frame_writable
int ff_inlink_make_frame_writable(AVFilterLink *link, AVFrame **rframe)
Make sure a frame is writable.
Definition: avfilter.c:1537
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:75
NULL
#define NULL
Definition: coverity.c:32
av_frame_copy_props
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:725
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_telecine.c:114
AVFilterFormatsConfig
Lists of formats / etc.
Definition: avfilter.h:111
ff_filter_link
static FilterLink * ff_filter_link(AVFilterLink *link)
Definition: filters.h:197
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:94
TelecineContext::frame
AVFrame * frame[5]
Definition: vf_telecine.c:52
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
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
TelecineContext::planeheight
int planeheight[4]
Definition: vf_telecine.c:49
av_isdigit
static av_const int av_isdigit(int c)
Locale-independent conversion of ASCII isdigit.
Definition: avstring.h:202
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:220
interlaced
uint8_t interlaced
Definition: mxfenc.c:2270
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:553
TelecineContext
Definition: vf_telecine.c:36
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
AVFrame::top_field_first
attribute_deprecated int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:574
FILTER_QUERY_FUNC2
#define FILTER_QUERY_FUNC2(func)
Definition: filters.h:239
ff_vf_telecine
const AVFilter ff_vf_telecine
Definition: vf_telecine.c:323
TelecineContext::ts_unit
AVRational ts_unit
Definition: vf_telecine.c:44
av_inv_q
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
len
int len
Definition: vorbis_enc_data.h:426
AVFilterPad::name
const char * name
Pad name.
Definition: filters.h:44
av_rescale
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
AV_FRAME_FLAG_INTERLACED
#define AV_FRAME_FLAG_INTERLACED
A flag to mark frames whose content is interlaced.
Definition: frame.h:648
AVFilter
Filter definition.
Definition: avfilter.h:201
TelecineContext::pts
AVRational pts
Definition: vf_telecine.c:43
ret
ret
Definition: filter_design.txt:187
frame
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 the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
TelecineContext::first_field
int first_field
Definition: vf_telecine.c:38
OFFSET
#define OFFSET(x)
Definition: vf_telecine.c:56
telecine_outputs
static const AVFilterPad telecine_outputs[]
Definition: vf_telecine.c:315
query_formats
static int query_formats(const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
Definition: vf_telecine.c:102
AVRational::den
int den
Denominator.
Definition: rational.h:60
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Underlying C type is int.
Definition: opt.h:259
avfilter.h
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_telecine.c:71
av_mul_q
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
AVFilterContext
An instance of a filter.
Definition: avfilter.h:457
FF_DISABLE_DEPRECATION_WARNINGS
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:72
desc
const char * desc
Definition: libsvtav1.c:79
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
TelecineContext::start_time
int64_t start_time
Definition: vf_telecine.c:41
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(telecine)
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_telecine.c:140
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:434
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
avstring.h
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Underlying C type is a uint8_t* that is either NULL or points to a C string allocated with the av_mal...
Definition: opt.h:276
first_field
static int first_field(const struct video_data *s)
Definition: v4l2.c:256
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
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Special option type for declaring named constants.
Definition: opt.h:299
FLAGS
#define FLAGS
Definition: vf_telecine.c:57
TelecineContext::nb_planes
int nb_planes
Definition: vf_telecine.c:48