FFmpeg
yadif_common.c
Go to the documentation of this file.
1 /*
2  * Copyright (C) 2006-2011 Michael Niedermayer <michaelni@gmx.at>
3  * 2010 James Darnley <james.darnley@gmail.com>
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 #include "libavutil/avassert.h"
23 #include "libavutil/imgutils.h"
24 #include "internal.h"
25 #include "video.h"
26 #include "yadif.h"
27 
28 static int return_frame(AVFilterContext *ctx, int is_second)
29 {
30  YADIFContext *yadif = ctx->priv;
31  AVFilterLink *link = ctx->outputs[0];
32  int tff, ret;
33 
34  if (yadif->parity == -1) {
35  tff = (yadif->cur->flags & AV_FRAME_FLAG_INTERLACED) ?
36  !!(yadif->cur->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST) : 1;
37  } else {
38  tff = yadif->parity ^ 1;
39  }
40 
41  if (is_second) {
42  yadif->out = ff_get_video_buffer(link, link->w, link->h);
43  if (!yadif->out)
44  return AVERROR(ENOMEM);
45 
46  av_frame_copy_props(yadif->out, yadif->cur);
47 #if FF_API_INTERLACED_FRAME
48 FF_DISABLE_DEPRECATION_WARNINGS
49  yadif->out->interlaced_frame = 0;
50 FF_ENABLE_DEPRECATION_WARNINGS
51 #endif
52  yadif->out->flags &= ~AV_FRAME_FLAG_INTERLACED;
53  if (yadif->current_field == YADIF_FIELD_BACK_END)
54  yadif->current_field = YADIF_FIELD_END;
55  }
56 
57  yadif->filter(ctx, yadif->out, tff ^ !is_second, tff);
58 
59  if (is_second) {
60  int64_t cur_pts = yadif->cur->pts;
61  int64_t next_pts = yadif->next->pts;
62 
63  if (next_pts != AV_NOPTS_VALUE && cur_pts != AV_NOPTS_VALUE) {
64  yadif->out->pts = cur_pts + next_pts;
65  } else {
66  yadif->out->pts = AV_NOPTS_VALUE;
67  }
68  }
69 
70  ff_ccfifo_inject(&yadif->cc_fifo, yadif->out);
71  ret = ff_filter_frame(ctx->outputs[0], yadif->out);
72 
73  yadif->frame_pending = (yadif->mode&1) && !is_second;
74  return ret;
75 }
76 
77 static int checkstride(YADIFContext *yadif, const AVFrame *a, const AVFrame *b)
78 {
79  int i;
80  for (i = 0; i < yadif->csp->nb_components; i++)
81  if (a->linesize[i] != b->linesize[i])
82  return 1;
83  return 0;
84 }
85 
86 static void fixstride(AVFilterLink *link, AVFrame *f)
87 {
88  AVFrame *dst = ff_default_get_video_buffer(link, f->width, f->height);
89  if(!dst)
90  return;
91  av_frame_copy_props(dst, f);
92  av_image_copy2(dst->data, dst->linesize,
93  f->data, f->linesize,
94  dst->format, dst->width, dst->height);
95  av_frame_unref(f);
96  av_frame_move_ref(f, dst);
97  av_frame_free(&dst);
98 }
99 
100 int ff_yadif_filter_frame(AVFilterLink *link, AVFrame *frame)
101 {
102  AVFilterContext *ctx = link->dst;
103  YADIFContext *yadif = ctx->priv;
104 
105  av_assert0(frame);
106 
107  ff_ccfifo_extract(&yadif->cc_fifo, frame);
108 
109  if (yadif->frame_pending)
110  return_frame(ctx, 1);
111 
112  if (yadif->prev)
113  av_frame_free(&yadif->prev);
114  yadif->prev = yadif->cur;
115  yadif->cur = yadif->next;
116  yadif->next = frame;
117 
118  if (!yadif->cur) {
119  yadif->cur = av_frame_clone(yadif->next);
120  if (!yadif->cur)
121  return AVERROR(ENOMEM);
122  yadif->current_field = YADIF_FIELD_END;
123  }
124 
125  if (checkstride(yadif, yadif->next, yadif->cur)) {
126  av_log(ctx, AV_LOG_VERBOSE, "Reallocating frame due to differing stride\n");
127  fixstride(link, yadif->next);
128  }
129  if (checkstride(yadif, yadif->next, yadif->cur))
130  fixstride(link, yadif->cur);
131  if (yadif->prev && checkstride(yadif, yadif->next, yadif->prev))
132  fixstride(link, yadif->prev);
133  if (checkstride(yadif, yadif->next, yadif->cur) || (yadif->prev && checkstride(yadif, yadif->next, yadif->prev))) {
134  av_log(ctx, AV_LOG_ERROR, "Failed to reallocate frame\n");
135  return -1;
136  }
137 
138  if (!yadif->prev)
139  return 0;
140 
141  if ((yadif->deint && !(yadif->cur->flags & AV_FRAME_FLAG_INTERLACED)) ||
142  ctx->is_disabled ||
143  (yadif->deint && !(yadif->prev->flags & AV_FRAME_FLAG_INTERLACED) && yadif->prev->repeat_pict) ||
144  (yadif->deint && !(yadif->next->flags & AV_FRAME_FLAG_INTERLACED) && yadif->next->repeat_pict)
145  ) {
146  yadif->out = av_frame_clone(yadif->cur);
147  if (!yadif->out)
148  return AVERROR(ENOMEM);
149 
150  ff_ccfifo_inject(&yadif->cc_fifo, yadif->out);
151  av_frame_free(&yadif->prev);
152  if (yadif->out->pts != AV_NOPTS_VALUE)
153  yadif->out->pts *= 2;
154  yadif->out->duration *= 2;
155  return ff_filter_frame(ctx->outputs[0], yadif->out);
156  }
157 
158  yadif->out = ff_get_video_buffer(ctx->outputs[0], link->w, link->h);
159  if (!yadif->out)
160  return AVERROR(ENOMEM);
161 
162  av_frame_copy_props(yadif->out, yadif->cur);
163 #if FF_API_INTERLACED_FRAME
164 FF_DISABLE_DEPRECATION_WARNINGS
165  yadif->out->interlaced_frame = 0;
166 FF_ENABLE_DEPRECATION_WARNINGS
167 #endif
168  yadif->out->flags &= ~AV_FRAME_FLAG_INTERLACED;
169 
170  if (yadif->out->pts != AV_NOPTS_VALUE)
171  yadif->out->pts *= 2;
172  if (!(yadif->mode & 1))
173  yadif->out->duration *= 2;
174 
175  return return_frame(ctx, 0);
176 }
177 
178 int ff_yadif_request_frame(AVFilterLink *link)
179 {
180  AVFilterContext *ctx = link->src;
181  YADIFContext *yadif = ctx->priv;
182  int ret;
183 
184  if (yadif->frame_pending) {
185  return_frame(ctx, 1);
186  return 0;
187  }
188 
189  if (yadif->eof)
190  return AVERROR_EOF;
191 
192  ret = ff_request_frame(ctx->inputs[0]);
193 
194  if (ret == AVERROR_EOF && yadif->cur) {
195  AVFrame *next = av_frame_clone(yadif->next);
196 
197  if (!next)
198  return AVERROR(ENOMEM);
199 
200  yadif->current_field = YADIF_FIELD_BACK_END;
201  next->pts = yadif->next->pts * 2 - yadif->cur->pts;
202 
203  ff_yadif_filter_frame(ctx->inputs[0], next);
204  yadif->eof = 1;
205  } else if (ret < 0) {
206  return ret;
207  }
208 
209  return 0;
210 }
211 
212 #define OFFSET(x) offsetof(YADIFContext, x)
213 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
214 
215 #define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, INT_MIN, INT_MAX, FLAGS, unit }
216 
217 const AVOption ff_yadif_options[] = {
218  { "mode", "specify the interlacing mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=YADIF_MODE_SEND_FRAME}, 0, 3, FLAGS, "mode"},
219  CONST("send_frame", "send one frame for each frame", YADIF_MODE_SEND_FRAME, "mode"),
220  CONST("send_field", "send one frame for each field", YADIF_MODE_SEND_FIELD, "mode"),
221  CONST("send_frame_nospatial", "send one frame for each frame, but skip spatial interlacing check", YADIF_MODE_SEND_FRAME_NOSPATIAL, "mode"),
222  CONST("send_field_nospatial", "send one frame for each field, but skip spatial interlacing check", YADIF_MODE_SEND_FIELD_NOSPATIAL, "mode"),
223 
224  { "parity", "specify the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=YADIF_PARITY_AUTO}, -1, 1, FLAGS, "parity" },
225  CONST("tff", "assume top field first", YADIF_PARITY_TFF, "parity"),
226  CONST("bff", "assume bottom field first", YADIF_PARITY_BFF, "parity"),
227  CONST("auto", "auto detect parity", YADIF_PARITY_AUTO, "parity"),
228 
229  { "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=YADIF_DEINT_ALL}, 0, 1, FLAGS, "deint" },
230  CONST("all", "deinterlace all frames", YADIF_DEINT_ALL, "deint"),
231  CONST("interlaced", "only deinterlace frames marked as interlaced", YADIF_DEINT_INTERLACED, "deint"),
232 
233  { NULL }
234 };
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:108
ff_yadif_request_frame
int ff_yadif_request_frame(AVFilterLink *link)
Definition: yadif_common.c:178
YADIF_MODE_SEND_FIELD
@ YADIF_MODE_SEND_FIELD
send 1 frame for each field
Definition: yadif.h:29
FF_ENABLE_DEPRECATION_WARNINGS
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:73
YADIFContext::parity
int parity
YADIFParity.
Definition: yadif.h:55
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
YADIFContext::frame_pending
int frame_pending
Definition: yadif.h:58
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:978
AVFrame::duration
int64_t duration
Duration of the frame, in the same units as pts.
Definition: frame.h:807
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
YADIFContext::csp
const AVPixFmtDescriptor * csp
Definition: yadif.h:76
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:100
YADIFContext::mode
int mode
YADIFMode.
Definition: yadif.h:54
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
AVFrame::width
int width
Definition: frame.h:412
FLAGS
#define FLAGS
Definition: yadif_common.c:213
AVOption
AVOption.
Definition: opt.h:251
b
#define b
Definition: input.c:41
ff_request_frame
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:431
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
AVFrame::flags
int flags
Frame flags, a combination of AV_FRAME_FLAGS.
Definition: frame.h:649
video.h
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:361
YADIF_MODE_SEND_FRAME
@ YADIF_MODE_SEND_FRAME
send 1 frame for each frame
Definition: yadif.h:28
YADIF_MODE_SEND_FIELD_NOSPATIAL
@ YADIF_MODE_SEND_FIELD_NOSPATIAL
send 1 frame for each field but skips spatial interlacing check
Definition: yadif.h:31
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:641
ff_default_get_video_buffer
AVFrame * ff_default_get_video_buffer(AVFilterLink *link, int w, int h)
Definition: video.c:103
YADIF_PARITY_AUTO
@ YADIF_PARITY_AUTO
auto detection
Definition: yadif.h:37
YADIFContext::deint
int deint
YADIFDeint.
Definition: yadif.h:56
YADIF_MODE_SEND_FRAME_NOSPATIAL
@ YADIF_MODE_SEND_FRAME_NOSPATIAL
send 1 frame for each frame but skips spatial interlacing check
Definition: yadif.h:30
AVFrame::interlaced_frame
attribute_deprecated int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:530
avassert.h
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
ff_ccfifo_inject
int ff_ccfifo_inject(CCFifo *ccf, AVFrame *frame)
Insert CC data from the FIFO into an AVFrame (as side data)
Definition: ccfifo.c:143
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:40
ctx
AVFormatContext * ctx
Definition: movenc.c:48
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
link
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 link
Definition: filter_design.txt:23
frame
static AVFrame * frame
Definition: demux_decode.c:54
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:736
CONST
#define CONST(name, help, val, unit)
Definition: yadif_common.c:215
AVPixFmtDescriptor::nb_components
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:71
YADIFContext::eof
int eof
Definition: yadif.h:77
ff_ccfifo_extract
int ff_ccfifo_extract(CCFifo *ccf, AVFrame *frame)
Extract CC data from an AVFrame.
Definition: ccfifo.c:193
yadif.h
f
f
Definition: af_crystalizer.c:121
checkstride
static int checkstride(YADIFContext *yadif, const AVFrame *a, const AVFrame *b)
Definition: yadif_common.c:77
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
YADIFContext::out
AVFrame * out
Definition: yadif.h:63
YADIFContext::filter
void(* filter)(AVFilterContext *ctx, AVFrame *dstpic, int parity, int tff)
Definition: yadif.h:65
parity
mcdeint parity
Definition: vf_mcdeint.c:281
AVFrame::format
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames,...
Definition: frame.h:427
a
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:41
YADIFContext::prev
AVFrame * prev
Definition: yadif.h:62
OFFSET
#define OFFSET(x)
Definition: yadif_common.c:212
internal.h
fixstride
static void fixstride(AVFilterLink *link, AVFrame *f)
Definition: yadif_common.c:86
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:255
YADIFContext
Definition: yadif.h:51
av_frame_move_ref
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everything contained in src to dst and reset src.
Definition: frame.c:649
av_frame_unref
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:622
AV_FRAME_FLAG_INTERLACED
#define AV_FRAME_FLAG_INTERLACED
A flag to mark frames whose content is interlaced.
Definition: frame.h:636
ff_yadif_options
const AVOption ff_yadif_options[]
Definition: yadif_common.c:217
ret
ret
Definition: filter_design.txt:187
YADIF_DEINT_ALL
@ YADIF_DEINT_ALL
deinterlace all frames
Definition: yadif.h:41
AVFrame::height
int height
Definition: frame.h:412
YADIFContext::next
AVFrame * next
Definition: yadif.h:61
YADIF_FIELD_END
@ YADIF_FIELD_END
The first or last field in a sequence.
Definition: yadif.h:47
av_image_copy2
static void av_image_copy2(uint8_t *const dst_data[4], const int dst_linesizes[4], uint8_t *const src_data[4], const int src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height)
Wrapper around av_image_copy() to workaround the limitation that the conversion from uint8_t * const ...
Definition: imgutils.h:184
mode
mode
Definition: ebur128.h:83
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
AVFilterContext
An instance of a filter.
Definition: avfilter.h:397
YADIF_DEINT_INTERLACED
@ YADIF_DEINT_INTERLACED
only deinterlace frames marked as interlaced
Definition: yadif.h:42
YADIF_FIELD_BACK_END
@ YADIF_FIELD_BACK_END
The last frame in a sequence.
Definition: yadif.h:46
FF_DISABLE_DEPRECATION_WARNINGS
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:72
YADIF_PARITY_TFF
@ YADIF_PARITY_TFF
top field first
Definition: yadif.h:35
YADIFContext::current_field
int current_field
YADIFCurrentField.
Definition: yadif.h:88
YADIFContext::cc_fifo
CCFifo cc_fifo
Definition: yadif.h:80
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
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
YADIFContext::cur
AVFrame * cur
Definition: yadif.h:60
return_frame
static int return_frame(AVFilterContext *ctx, int is_second)
Definition: yadif_common.c:28
AVFrame::repeat_pict
int repeat_pict
Number of fields in this frame which should be repeated, i.e.
Definition: frame.h:521
ff_yadif_filter_frame
int ff_yadif_filter_frame(AVFilterLink *link, AVFrame *frame)
Definition: yadif_common.c:100
YADIF_PARITY_BFF
@ YADIF_PARITY_BFF
bottom field first
Definition: yadif.h:36
Generated on Thu Apr 18 2024 22:42:32 for FFmpeg by   doxygen 1.8.17