FFmpeg
yadif_common.c
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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 "yadif.h"
26 
27 static int return_frame(AVFilterContext *ctx, int is_second)
28 {
29  YADIFContext *yadif = ctx->priv;
30  AVFilterLink *link = ctx->outputs[0];
31  int tff, ret;
32 
33  if (yadif->parity == -1) {
34  tff = yadif->cur->interlaced_frame ?
35  yadif->cur->top_field_first : 1;
36  } else {
37  tff = yadif->parity ^ 1;
38  }
39 
40  if (is_second) {
41  yadif->out = ff_get_video_buffer(link, link->w, link->h);
42  if (!yadif->out)
43  return AVERROR(ENOMEM);
44 
45  av_frame_copy_props(yadif->out, yadif->cur);
46  yadif->out->interlaced_frame = 0;
47  if (yadif->current_field == YADIF_FIELD_BACK_END)
49  }
50 
51  yadif->filter(ctx, yadif->out, tff ^ !is_second, tff);
52 
53  if (is_second) {
54  int64_t cur_pts = yadif->cur->pts;
55  int64_t next_pts = yadif->next->pts;
56 
57  if (next_pts != AV_NOPTS_VALUE && cur_pts != AV_NOPTS_VALUE) {
58  yadif->out->pts = cur_pts + next_pts;
59  } else {
60  yadif->out->pts = AV_NOPTS_VALUE;
61  }
62  }
63  ret = ff_filter_frame(ctx->outputs[0], yadif->out);
64 
65  yadif->frame_pending = (yadif->mode&1) && !is_second;
66  return ret;
67 }
68 
69 static int checkstride(YADIFContext *yadif, const AVFrame *a, const AVFrame *b)
70 {
71  int i;
72  for (i = 0; i < yadif->csp->nb_components; i++)
73  if (a->linesize[i] != b->linesize[i])
74  return 1;
75  return 0;
76 }
77 
79 {
80  AVFrame *dst = ff_default_get_video_buffer(link, f->width, f->height);
81  if(!dst)
82  return;
83  av_frame_copy_props(dst, f);
84  av_image_copy(dst->data, dst->linesize,
85  (const uint8_t **)f->data, f->linesize,
86  dst->format, dst->width, dst->height);
87  av_frame_unref(f);
88  av_frame_move_ref(f, dst);
89  av_frame_free(&dst);
90 }
91 
93 {
94  AVFilterContext *ctx = link->dst;
95  YADIFContext *yadif = ctx->priv;
96 
97  av_assert0(frame);
98 
99  if (yadif->frame_pending)
100  return_frame(ctx, 1);
101 
102  if (yadif->prev)
103  av_frame_free(&yadif->prev);
104  yadif->prev = yadif->cur;
105  yadif->cur = yadif->next;
106  yadif->next = frame;
107 
108  if (!yadif->cur) {
109  yadif->cur = av_frame_clone(yadif->next);
110  if (!yadif->cur)
111  return AVERROR(ENOMEM);
113  }
114 
115  if (checkstride(yadif, yadif->next, yadif->cur)) {
116  av_log(ctx, AV_LOG_VERBOSE, "Reallocating frame due to differing stride\n");
117  fixstride(link, yadif->next);
118  }
119  if (checkstride(yadif, yadif->next, yadif->cur))
120  fixstride(link, yadif->cur);
121  if (yadif->prev && checkstride(yadif, yadif->next, yadif->prev))
122  fixstride(link, yadif->prev);
123  if (checkstride(yadif, yadif->next, yadif->cur) || (yadif->prev && checkstride(yadif, yadif->next, yadif->prev))) {
124  av_log(ctx, AV_LOG_ERROR, "Failed to reallocate frame\n");
125  return -1;
126  }
127 
128  if (!yadif->prev)
129  return 0;
130 
131  if ((yadif->deint && !yadif->cur->interlaced_frame) ||
132  ctx->is_disabled ||
133  (yadif->deint && !yadif->prev->interlaced_frame && yadif->prev->repeat_pict) ||
134  (yadif->deint && !yadif->next->interlaced_frame && yadif->next->repeat_pict)
135  ) {
136  yadif->out = av_frame_clone(yadif->cur);
137  if (!yadif->out)
138  return AVERROR(ENOMEM);
139 
140  av_frame_free(&yadif->prev);
141  if (yadif->out->pts != AV_NOPTS_VALUE)
142  yadif->out->pts *= 2;
143  return ff_filter_frame(ctx->outputs[0], yadif->out);
144  }
145 
146  yadif->out = ff_get_video_buffer(ctx->outputs[0], link->w, link->h);
147  if (!yadif->out)
148  return AVERROR(ENOMEM);
149 
150  av_frame_copy_props(yadif->out, yadif->cur);
151  yadif->out->interlaced_frame = 0;
152 
153  if (yadif->out->pts != AV_NOPTS_VALUE)
154  yadif->out->pts *= 2;
155 
156  return return_frame(ctx, 0);
157 }
158 
160 {
161  AVFilterContext *ctx = link->src;
162  YADIFContext *yadif = ctx->priv;
163  int ret;
164 
165  if (yadif->frame_pending) {
166  return_frame(ctx, 1);
167  return 0;
168  }
169 
170  if (yadif->eof)
171  return AVERROR_EOF;
172 
173  ret = ff_request_frame(ctx->inputs[0]);
174 
175  if (ret == AVERROR_EOF && yadif->cur) {
176  AVFrame *next = av_frame_clone(yadif->next);
177 
178  if (!next)
179  return AVERROR(ENOMEM);
180 
182  next->pts = yadif->next->pts * 2 - yadif->cur->pts;
183 
184  ff_yadif_filter_frame(ctx->inputs[0], next);
185  yadif->eof = 1;
186  } else if (ret < 0) {
187  return ret;
188  }
189 
190  return 0;
191 }
192 
193 #define OFFSET(x) offsetof(YADIFContext, x)
194 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
195 
196 #define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, INT_MIN, INT_MAX, FLAGS, unit }
197 
199  { "mode", "specify the interlacing mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=YADIF_MODE_SEND_FRAME}, 0, 3, FLAGS, "mode"},
200  CONST("send_frame", "send one frame for each frame", YADIF_MODE_SEND_FRAME, "mode"),
201  CONST("send_field", "send one frame for each field", YADIF_MODE_SEND_FIELD, "mode"),
202  CONST("send_frame_nospatial", "send one frame for each frame, but skip spatial interlacing check", YADIF_MODE_SEND_FRAME_NOSPATIAL, "mode"),
203  CONST("send_field_nospatial", "send one frame for each field, but skip spatial interlacing check", YADIF_MODE_SEND_FIELD_NOSPATIAL, "mode"),
204 
205  { "parity", "specify the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=YADIF_PARITY_AUTO}, -1, 1, FLAGS, "parity" },
206  CONST("tff", "assume top field first", YADIF_PARITY_TFF, "parity"),
207  CONST("bff", "assume bottom field first", YADIF_PARITY_BFF, "parity"),
208  CONST("auto", "auto detect parity", YADIF_PARITY_AUTO, "parity"),
209 
210  { "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=YADIF_DEINT_ALL}, 0, 1, FLAGS, "deint" },
211  CONST("all", "deinterlace all frames", YADIF_DEINT_ALL, "deint"),
212  CONST("interlaced", "only deinterlace frames marked as interlaced", YADIF_DEINT_INTERLACED, "deint"),
213 
214  { NULL }
215 };
#define NULL
Definition: coverity.c:32
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
AVOption.
Definition: opt.h:246
misc image utilities
void(* filter)(AVFilterContext *ctx, AVFrame *dstpic, int parity, int tff)
Definition: yadif.h:64
int repeat_pict
When decoding, this signals how much the picture must be delayed.
Definition: frame.h:437
send 1 frame for each frame but skips spatial interlacing check
Definition: yadif.h:29
int frame_pending
Definition: yadif.h:57
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:36
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everything contained in src to dst and reset src.
Definition: frame.c:582
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
int is_disabled
the enabled state from the last expression evaluation
Definition: avfilter.h:385
#define FLAGS
Definition: yadif_common.c:194
int current_field
YADIFCurrentField.
Definition: yadif.h:86
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:346
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1080
AVFrame * cur
Definition: yadif.h:59
uint8_t
#define f(width, name)
Definition: cbs_vp9.c:255
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:388
AVFrame * next
Definition: yadif.h:60
bottom field first
Definition: yadif.h:35
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:442
send 1 frame for each field
Definition: yadif.h:28
AVFrame * prev
Definition: yadif.h:61
int ff_yadif_filter_frame(AVFilterLink *link, AVFrame *frame)
Definition: yadif_common.c:92
#define av_log(a,...)
auto detection
Definition: yadif.h:36
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
int width
Definition: frame.h:353
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int deint
YADIFDeint.
Definition: yadif.h:55
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
void * priv
private data for use by the filter
Definition: avfilter.h:353
simple assert() macros that are a bit more flexible than ISO C assert().
static int return_frame(AVFilterContext *ctx, int is_second)
Definition: yadif_common.c:27
void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4], const uint8_t *src_data[4], const int src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height)
Copy image in src_data to dst_data.
Definition: imgutils.c:387
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:83
#define b
Definition: input.c:41
static void fixstride(AVFilterLink *link, AVFrame *f)
Definition: yadif_common.c:78
AVFormatContext * ctx
Definition: movenc.c:48
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
mcdeint parity
Definition: vf_mcdeint.c:274
int eof
Definition: yadif.h:76
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:540
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:368
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:326
AVFrame * out
Definition: yadif.h:62
#define OFFSET(x)
Definition: yadif_common.c:193
#define CONST(name, help, val, unit)
Definition: yadif_common.c:196
static int checkstride(YADIFContext *yadif, const AVFrame *a, const AVFrame *b)
Definition: yadif_common.c:69
The first or last field in a sequence.
Definition: yadif.h:46
int parity
YADIFParity.
Definition: yadif.h:54
send 1 frame for each field but skips spatial interlacing check
Definition: yadif.h:30
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
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:553
int ff_yadif_request_frame(AVFilterLink *link)
Definition: yadif_common.c:159
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
AVFrame * ff_default_get_video_buffer(AVFilterLink *link, int w, int h)
Definition: video.c:44
const AVPixFmtDescriptor * csp
Definition: yadif.h:75
deinterlace all frames
Definition: yadif.h:40
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:447
send 1 frame for each frame
Definition: yadif.h:27
An instance of a filter.
Definition: avfilter.h:338
int height
Definition: frame.h:353
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:407
internal API functions
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
only deinterlace frames marked as interlaced
Definition: yadif.h:41
The last frame in a sequence.
Definition: yadif.h:45
top field first
Definition: yadif.h:34
mode
Use these values in ebur128_init (or&#39;ed).
Definition: ebur128.h:83
int mode
YADIFMode.
Definition: yadif.h:53
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:654
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
const AVOption ff_yadif_options[]
Definition: yadif_common.c:198