FFmpeg: libavfilter/yadif_common.c Source File

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 "filters.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  yadif->out->flags &= ~AV_FRAME_FLAG_INTERLACED;
48  if (yadif->current_field == YADIF_FIELD_BACK_END)
49  yadif->current_field = YADIF_FIELD_END;
50  }
51 
52  yadif->filter(ctx, yadif->out, tff ^ !is_second, tff);
53 
54  if (is_second) {
55  int64_t cur_pts = yadif->cur->pts;
56  int64_t next_pts = yadif->next->pts;
57 
58  if (next_pts != AV_NOPTS_VALUE && cur_pts != AV_NOPTS_VALUE) {
59  yadif->out->pts = cur_pts + next_pts;
60  if (yadif->pts_multiplier == 1) {
61  yadif->out->pts >>= 1;
62  yadif->out->duration >>= 1;
63  }
64  } else {
65  yadif->out->pts = AV_NOPTS_VALUE;
66  }
67  }
68 
69  ff_ccfifo_inject(&yadif->cc_fifo, yadif->out);
70  ret = ff_filter_frame(ctx->outputs[0], yadif->out);
71 
72  yadif->frame_pending = (yadif->mode&1) && !is_second;
73  return ret;
74 }
75 
76  static int checkstride(YADIFContext *yadif, const AVFrame *a, const AVFrame *b)
77 {
78  int i;
79  for (i = 0; i < yadif->csp->nb_components; i++)
80  if (a->linesize[i] != b->linesize[i])
81  return 1;
82  return 0;
83 }
84 
85  static void fixstride(AVFilterLink *link, AVFrame *f)
86 {
87  AVFrame *dst = ff_default_get_video_buffer(link, f->width, f->height);
88  if(!dst)
89  return;
90  av_frame_copy_props(dst, f);
91  av_image_copy2(dst->data, dst->linesize,
92  f->data, f->linesize,
93  dst->format, dst->width, dst->height);
94  av_frame_unref(f);
95  av_frame_move_ref(f, dst);
96  av_frame_free(&dst);
97 }
98 
99  int ff_yadif_filter_frame(AVFilterLink *link, AVFrame *frame)
100 {
101  AVFilterContext *ctx = link->dst;
102  YADIFContext *yadif = ctx->priv;
103 
104  av_assert0(frame);
105 
106  ff_ccfifo_extract(&yadif->cc_fifo, frame);
107 
108  if (yadif->frame_pending)
109  return_frame(ctx, 1);
110 
111  if (yadif->prev)
112  av_frame_free(&yadif->prev);
113  yadif->prev = yadif->cur;
114  yadif->cur = yadif->next;
115  yadif->next = frame;
116 
117  if (!yadif->cur) {
118  yadif->cur = av_frame_clone(yadif->next);
119  if (!yadif->cur)
120  return AVERROR(ENOMEM);
121  yadif->current_field = YADIF_FIELD_END;
122  }
123 
124  if (checkstride(yadif, yadif->next, yadif->cur)) {
125  av_log(ctx, AV_LOG_VERBOSE, "Reallocating frame due to differing stride\n");
126  fixstride(link, yadif->next);
127  }
128  if (checkstride(yadif, yadif->next, yadif->cur))
129  fixstride(link, yadif->cur);
130  if (yadif->prev && checkstride(yadif, yadif->next, yadif->prev))
131  fixstride(link, yadif->prev);
132  if (checkstride(yadif, yadif->next, yadif->cur) || (yadif->prev && checkstride(yadif, yadif->next, yadif->prev))) {
133  av_log(ctx, AV_LOG_ERROR, "Failed to reallocate frame\n");
134  return -1;
135  }
136 
137  if (!yadif->prev)
138  return 0;
139 
140  if ((yadif->deint && !(yadif->cur->flags & AV_FRAME_FLAG_INTERLACED)) ||
141  ctx->is_disabled ||
142  (yadif->deint && !(yadif->prev->flags & AV_FRAME_FLAG_INTERLACED) && yadif->prev->repeat_pict) ||
143  (yadif->deint && !(yadif->next->flags & AV_FRAME_FLAG_INTERLACED) && yadif->next->repeat_pict)
144  ) {
145  yadif->out = av_frame_clone(yadif->cur);
146  if (!yadif->out)
147  return AVERROR(ENOMEM);
148 
149  ff_ccfifo_inject(&yadif->cc_fifo, yadif->out);
150  av_frame_free(&yadif->prev);
151  if (yadif->out->pts != AV_NOPTS_VALUE)
152  yadif->out->pts *= yadif->pts_multiplier;
153  yadif->out->duration *= yadif->pts_multiplier;
154  return ff_filter_frame(ctx->outputs[0], yadif->out);
155  }
156 
157  yadif->out = ff_get_video_buffer(ctx->outputs[0], link->w, link->h);
158  if (!yadif->out)
159  return AVERROR(ENOMEM);
160 
161  av_frame_copy_props(yadif->out, yadif->cur);
162  yadif->out->flags &= ~AV_FRAME_FLAG_INTERLACED;
163 
164  if (yadif->out->pts != AV_NOPTS_VALUE)
165  yadif->out->pts *= yadif->pts_multiplier;
166  if (!(yadif->mode & 1))
167  yadif->out->duration *= yadif->pts_multiplier;
168  else if (yadif->pts_multiplier == 1)
169  yadif->out->duration >>= 1;
170 
171  return return_frame(ctx, 0);
172 }
173 
174  int ff_yadif_request_frame(AVFilterLink *link)
175 {
176  AVFilterContext *ctx = link->src;
177  YADIFContext *yadif = ctx->priv;
178  int ret;
179 
180  if (yadif->frame_pending) {
181  return_frame(ctx, 1);
182  return 0;
183  }
184 
185  if (yadif->eof)
186  return AVERROR_EOF;
187 
188  ret = ff_request_frame(ctx->inputs[0]);
189 
190  if (ret == AVERROR_EOF && yadif->cur) {
191  AVFrame *next = av_frame_clone(yadif->next);
192 
193  if (!next)
194  return AVERROR(ENOMEM);
195 
196  yadif->current_field = YADIF_FIELD_BACK_END;
197  next->pts = yadif->next->pts * 2 - yadif->cur->pts;
198 
199  ff_yadif_filter_frame(ctx->inputs[0], next);
200  yadif->eof = 1;
201  } else if (ret < 0) {
202  return ret;
203  }
204 
205  return 0;
206 }
207 
208  int ff_yadif_config_output_common(AVFilterLink *outlink)
209 {
210  AVFilterContext *ctx = outlink->src;
211  FilterLink *il = ff_filter_link(ctx->inputs[0]);
212  FilterLink *ol = ff_filter_link(outlink);
213  YADIFContext *yadif = ctx->priv;
214  AVRational tb = ctx->inputs[0]->time_base;
215  int ret;
216 
217  if (av_reduce(&outlink->time_base.num, &outlink->time_base.den, tb.num, tb.den * 2LL, INT_MAX)) {
218  yadif->pts_multiplier = 2;
219  } else {
220  av_log(ctx, AV_LOG_WARNING, "Cannot use exact output timebase\n");
221  outlink->time_base = tb;
222  yadif->pts_multiplier = 1;
223  }
224 
225  outlink->w = ctx->inputs[0]->w;
226  outlink->h = ctx->inputs[0]->h;
227 
228  if (outlink->w < 3 || outlink->h < 3) {
229  av_log(ctx, AV_LOG_ERROR, "Video of less than 3 columns or lines is not supported\n");
230  return AVERROR(EINVAL);
231  }
232 
233  if(yadif->mode & 1)
234  ol->frame_rate = av_mul_q(il->frame_rate,
235  (AVRational){2, 1});
236  else
237  ol->frame_rate = il->frame_rate;
238 
239  ret = ff_ccfifo_init(&yadif->cc_fifo, ol->frame_rate, ctx);
240  if (ret < 0) {
241  av_log(ctx, AV_LOG_ERROR, "Failure to setup CC FIFO queue\n");
242  return ret;
243  }
244 
245  return 0;
246 }
247 
248  void ff_yadif_uninit(AVFilterContext *ctx)
249 {
250  YADIFContext *yadif = ctx->priv;
251 
252  av_frame_free(&yadif->prev);
253  av_frame_free(&yadif->cur );
254  av_frame_free(&yadif->next);
255  ff_ccfifo_uninit(&yadif->cc_fifo);
256 }
257 
258  #define OFFSET(x) offsetof(YADIFContext, x)
259  #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
260 
261  #define CONST(name, help, val, u) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, INT_MIN, INT_MAX, FLAGS, .unit = u }
262 
263  const AVOption ff_yadif_options[] = {
264  { "mode", "specify the interlacing mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=YADIF_MODE_SEND_FRAME}, 0, 3, FLAGS, .unit = "mode"},
265  CONST("send_frame", "send one frame for each frame", YADIF_MODE_SEND_FRAME, "mode"),
266  CONST("send_field", "send one frame for each field", YADIF_MODE_SEND_FIELD, "mode"),
267  CONST("send_frame_nospatial", "send one frame for each frame, but skip spatial interlacing check", YADIF_MODE_SEND_FRAME_NOSPATIAL, "mode"),
268  CONST("send_field_nospatial", "send one frame for each field, but skip spatial interlacing check", YADIF_MODE_SEND_FIELD_NOSPATIAL, "mode"),
269 
270  { "parity", "specify the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=YADIF_PARITY_AUTO}, -1, 1, FLAGS, .unit = "parity" },
271  CONST("tff", "assume top field first", YADIF_PARITY_TFF, "parity"),
272  CONST("bff", "assume bottom field first", YADIF_PARITY_BFF, "parity"),
273  CONST("auto", "auto detect parity", YADIF_PARITY_AUTO, "parity"),
274 
275  { "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=YADIF_DEINT_ALL}, 0, 1, FLAGS, .unit = "deint" },
276  CONST("all", "deinterlace all frames", YADIF_DEINT_ALL, "deint"),
277  CONST("interlaced", "only deinterlace frames marked as interlaced", YADIF_DEINT_INTERLACED, "deint"),
278 
279  { NULL }
280 };
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:117
ff_yadif_request_frame
int ff_yadif_request_frame(AVFilterLink *link)
Definition: yadif_common.c:174
YADIF_MODE_SEND_FIELD
@ YADIF_MODE_SEND_FIELD
send 1 frame for each field
Definition: yadif.h:29
YADIFContext::parity
int parity
YADIFParity.
Definition: yadif.h:55
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:216
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:1067
AVFrame::duration
int64_t duration
Duration of the frame, in the same units as pts.
Definition: frame.h:775
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
int64_t
long long int64_t
Definition: coverity.c:34
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:64
YADIFContext::mode
int mode
YADIFMode.
Definition: yadif.h:54
mode
Definition: swscale.c:56
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:427
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:529
FLAGS
#define FLAGS
Definition: yadif_common.c:259
AVOption
AVOption.
Definition: opt.h:429
b
#define b
Definition: input.c:42
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:483
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:226
AVFrame::flags
int flags
Frame flags, a combination of AV_FRAME_FLAGS.
Definition: frame.h:671
video.h
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:655
ff_default_get_video_buffer
AVFrame * ff_default_get_video_buffer(AVFilterLink *link, int w, int h)
Definition: video.c:112
YADIF_PARITY_AUTO
@ YADIF_PARITY_AUTO
auto detection
Definition: yadif.h:37
YADIFContext::deint
int deint
YADIFDeint.
Definition: yadif.h:56
ff_ccfifo_uninit
void ff_ccfifo_uninit(CCFifo *ccf)
Free all memory allocated in a CCFifo and clear the context.
Definition: ccfifo.c:46
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
av_reduce
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
AVRational::num
int num
Numerator.
Definition: rational.h:59
avassert.h
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:210
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:133
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:41
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:483
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
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:599
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
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
ff_ccfifo_extract
int ff_ccfifo_extract(CCFifo *ccf, AVFrame *frame)
Extract CC data from an AVFrame.
Definition: ccfifo.c:183
ff_filter_link
static FilterLink * ff_filter_link(AVFilterLink *link)
Definition: filters.h:198
yadif.h
f
f
Definition: af_crystalizer.c:122
checkstride
static int checkstride(YADIFContext *yadif, const AVFrame *a, const AVFrame *b)
Definition: yadif_common.c:76
dst
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
Definition: dsp.h:87
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:247
YADIFContext::out
AVFrame * out
Definition: yadif.h:63
YADIFContext::filter
void(* filter)(AVFilterContext *ctx, AVFrame *dstpic, int parity, int tff)
Definition: yadif.h:65
ff_yadif_config_output_common
int ff_yadif_config_output_common(AVFilterLink *outlink)
Definition: yadif_common.c:208
parity
mcdeint parity
Definition: vf_mcdeint.c:289
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:258
YADIFContext::pts_multiplier
int pts_multiplier
Definition: yadif.h:90
fixstride
static void fixstride(AVFilterLink *link, AVFrame *f)
Definition: yadif_common.c:85
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
ff_yadif_uninit
void ff_yadif_uninit(AVFilterContext *ctx)
Definition: yadif_common.c:248
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:523
av_frame_unref
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:496
AV_FRAME_FLAG_INTERLACED
#define AV_FRAME_FLAG_INTERLACED
A flag to mark frames whose content is interlaced.
Definition: frame.h:650
ff_yadif_options
const AVOption ff_yadif_options[]
Definition: yadif_common.c:263
ff_ccfifo_init
int ff_ccfifo_init(CCFifo *ccf, AVRational framerate, void *log_ctx)
Initialize a CCFifo.
Definition: ccfifo.c:53
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:265
YADIF_DEINT_ALL
@ YADIF_DEINT_ALL
deinterlace all frames
Definition: yadif.h:41
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
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
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:274
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
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
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
YADIFContext::cur
AVFrame * cur
Definition: yadif.h:60
CONST
#define CONST(name, help, val, u)
Definition: yadif_common.c:261
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:585
ff_yadif_filter_frame
int ff_yadif_filter_frame(AVFilterLink *link, AVFrame *frame)
Definition: yadif_common.c:99
YADIF_PARITY_BFF
@ YADIF_PARITY_BFF
bottom field first
Definition: yadif.h:36
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