FFmpeg
vf_untile.c
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1 /*
2  * Copyright (c) 2020 Nicolas George
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/imgutils.h"
22 #include "libavutil/opt.h"
23 #include "libavutil/pixdesc.h"
24 #include "avfilter.h"
25 #include "formats.h"
26 #include "filters.h"
27 
28 typedef struct UntileContext {
29  const AVClass *class;
30  unsigned w, h;
31  unsigned current;
32  unsigned nb_frames;
35  int64_t dpts, pts;
36  int max_step[4];
38 
39 #define OFFSET(x) offsetof(UntileContext, x)
40 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
41 
42 static const AVOption untile_options[] = {
43  { "layout", "set grid size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE,
44  {.str = "6x5"}, 0, 0, FLAGS },
45  { NULL }
46 };
47 
48 AVFILTER_DEFINE_CLASS(untile);
49 
51 {
52  UntileContext *s = ctx->priv;
53 
54  if (s->w > UINT_MAX / s->h) {
55  av_log(ctx, AV_LOG_ERROR, "Tile size %ux%u is insane.\n",
56  s->w, s->h);
57  return AVERROR(EINVAL);
58  }
59  s->nb_frames = s->w * s->h;
60  return 0;
61 }
62 
64 {
66  int ret;
67 
68  ret = ff_formats_pixdesc_filter(&formats, 0,
72  if (ret < 0)
73  return ret;
74  return ff_set_common_formats(ctx, formats);
75 }
76 
77 static int config_output(AVFilterLink *outlink)
78 {
79  AVFilterContext *ctx = outlink->src;
80  UntileContext *s = ctx->priv;
81  AVFilterLink *inlink = ctx->inputs[0];
82  AVRational dt;
83 
84  s->desc = av_pix_fmt_desc_get(outlink->format);
85  if (inlink->w % (s->w << s->desc->log2_chroma_w) ||
86  inlink->h % (s->h << s->desc->log2_chroma_h)) {
87  av_log(ctx, AV_LOG_ERROR,
88  "Input resolution %ux%u not multiple of layout %ux%u.\n",
89  inlink->w, inlink->h, s->w, s->h);
90  return AVERROR(EINVAL);
91  }
92  outlink->w = inlink->w / s->w;
93  outlink->h = inlink->h / s->h;
94  outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
95  outlink->frame_rate = av_mul_q(inlink->frame_rate, av_make_q(s->nb_frames, 1));
96  if (outlink->frame_rate.num)
97  dt = av_inv_q(outlink->frame_rate);
98  else
99  dt = av_mul_q(inlink->time_base, av_make_q(1, s->nb_frames));
100  outlink->time_base = av_gcd_q(inlink->time_base, dt, AV_TIME_BASE / 2, AV_TIME_BASE_Q);
101  s->dpts = av_rescale_q(1, dt, outlink->time_base);
102  av_log(ctx, AV_LOG_VERBOSE, "frame interval: %"PRId64"*%d/%d\n",
103  s->dpts, dt.num, dt.den);
105  return 0;
106 }
107 
109 {
110  UntileContext *s = ctx->priv;
111  AVFilterLink *inlink = ctx->inputs[0];
112  AVFilterLink *outlink = ctx->outputs[0];
113  AVFrame *out;
114  int i, x, y, ret;
115 
116  FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
117  if (!s->frame) {
118  ret = ff_inlink_consume_frame(inlink, &s->frame);
119  if (ret < 0)
120  return ret;
121  if (ret)
122  s->pts = av_rescale_q(s->frame->pts, inlink->time_base, outlink->time_base);
123  }
124  if (s->frame) {
125  if (s->current == s->nb_frames - 1) {
126  out = s->frame;
127  s->frame = NULL;
128  } else {
129  out = av_frame_clone(s->frame);
130  if (!out)
131  return AVERROR(ENOMEM);
132  }
133  x = outlink->w * (s->current % s->w);
134  y = outlink->h * (s->current / s->w);
135  out->width = outlink->w;
136  out->height = outlink->h;
137  out->data[0] += y * out->linesize[0];
138  out->data[0] += x * s->max_step[0];
139  if (!(s->desc->flags & AV_PIX_FMT_FLAG_PAL || s->desc->flags & FF_PSEUDOPAL)) {
140  for (i = 1; i < 3; i ++) {
141  if (out->data[i]) {
142  out->data[i] += (y >> s->desc->log2_chroma_w) * out->linesize[i];
143  out->data[i] += (x >> s->desc->log2_chroma_h) * s->max_step[i];
144  }
145  }
146  }
147  if (out->data[3]) {
148  out->data[3] += y * out->linesize[3];
149  out->data[3] += x * s->max_step[3];
150  }
151  out->pts = s->pts;
152  s->pts += s->dpts;
153  if (++s->current == s->nb_frames)
154  s->current = 0;
155  return ff_filter_frame(outlink, out);
156  }
157  FF_FILTER_FORWARD_STATUS(inlink, outlink);
158  FF_FILTER_FORWARD_WANTED(outlink, inlink);
159  return FFERROR_NOT_READY;
160 
161 }
162 
164 {
165  UntileContext *s = ctx->priv;
166 
167  av_frame_free(&s->frame);
168 }
169 
170 static const AVFilterPad untile_inputs[] = {
171  {
172  .name = "default",
173  .type = AVMEDIA_TYPE_VIDEO,
174  },
175  { NULL }
176 };
177 
178 static const AVFilterPad untile_outputs[] = {
179  {
180  .name = "default",
181  .type = AVMEDIA_TYPE_VIDEO,
182  .config_props = config_output,
183  },
184  { NULL }
185 };
186 
188  .name = "untile",
189  .description = NULL_IF_CONFIG_SMALL("Untile a frame into a sequence of frames."),
190  .init = init,
191  .uninit = uninit,
192  .query_formats = query_formats,
193  .activate = activate,
194  .priv_size = sizeof(UntileContext),
195  .inputs = untile_inputs,
196  .outputs = untile_outputs,
197  .priv_class = &untile_class,
198 };
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:132
int ff_inlink_consume_frame(AVFilterLink *link, AVFrame **rframe)
Take a frame from the link&#39;s FIFO and update the link&#39;s stats.
Definition: avfilter.c:1489
#define NULL
Definition: coverity.c:32
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
This structure describes decoded (raw) audio or video data.
Definition: frame.h:308
AVOption.
Definition: opt.h:248
static av_cold int init(AVFilterContext *ctx)
Definition: vf_untile.c:50
misc image utilities
Main libavfilter public API header.
FF_FILTER_FORWARD_STATUS(inlink, outlink)
int num
Numerator.
Definition: rational.h:59
static const AVOption untile_options[]
Definition: vf_untile.c:42
static int activate(AVFilterContext *ctx)
Definition: vf_untile.c:108
int64_t dpts
Definition: vf_untile.c:35
return FFERROR_NOT_READY
AVFILTER_DEFINE_CLASS(untile)
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4], const AVPixFmtDescriptor *pixdesc)
Compute the max pixel step for each plane of an image with a format described by pixdesc.
Definition: imgutils.c:35
const char * name
Pad name.
Definition: internal.h:60
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:347
unsigned current
Definition: vf_untile.c:31
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1091
int ff_formats_pixdesc_filter(AVFilterFormats **rfmts, unsigned want, unsigned rej)
Construct a formats list containing all pixel formats with certain properties.
Definition: formats.c:368
#define av_cold
Definition: attributes.h:88
AVOptions.
AVFilter ff_vf_untile
Definition: vf_untile.c:187
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:401
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
static const AVFilterPad untile_inputs[]
Definition: vf_untile.c:170
#define av_log(a,...)
#define FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink)
Forward the status on an output link to an input link.
Definition: filters.h:199
unsigned nb_frames
Definition: vf_untile.c:32
A filter pad used for either input or output.
Definition: internal.h:54
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
int width
Definition: frame.h:366
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
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:588
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
static const AVFilterPad untile_outputs[]
Definition: vf_untile.c:178
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
void * priv
private data for use by the filter
Definition: avfilter.h:354
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
Definition: pixdesc.h:140
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
const AVPixFmtDescriptor * desc
Definition: vf_untile.c:34
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:553
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
static int config_output(AVFilterLink *outlink)
Definition: vf_untile.c:77
#define FF_PIX_FMT_FLAG_SW_FLAT_SUB
Definition: formats.h:240
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:339
int max_step[4]
Definition: vf_untile.c:36
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
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 inputs
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:145
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AVFrame * frame
Definition: vf_untile.c:33
const char * name
Filter name.
Definition: avfilter.h:149
int64_t pts
Definition: vf_untile.c:35
AVRational av_gcd_q(AVRational a, AVRational b, int max_den, AVRational def)
Return the best rational so that a and b are multiple of it.
Definition: rational.c:186
offset must point to two consecutive integers
Definition: opt.h:235
static int query_formats(AVFilterContext *ctx)
Definition: vf_untile.c:63
#define AV_PIX_FMT_FLAG_BITSTREAM
All values of a component are bit-wise packed end to end.
Definition: pixdesc.h:136
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:351
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:322
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
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
int den
Denominator.
Definition: rational.h:60
FF_FILTER_FORWARD_WANTED(outlink, inlink)
#define FF_PSEUDOPAL
Definition: internal.h:335
unsigned w
Definition: vf_untile.c:30
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_untile.c:163
A list of supported formats for one end of a filter link.
Definition: formats.h:65
An instance of a filter.
Definition: avfilter.h:339
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
int height
Definition: frame.h:366
#define OFFSET(x)
Definition: vf_untile.c:39
FILE * out
Definition: movenc.c:54
formats
Definition: signature.h:48
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
unsigned h
Definition: vf_untile.c:30
#define FLAGS
Definition: vf_untile.c:40
int i
Definition: input.c:407