FFmpeg
vf_il.c
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1 /*
2  * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
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
24  * (de)interleave fields filter
25  */
26 
27 #include "libavutil/opt.h"
28 #include "libavutil/imgutils.h"
29 #include "libavutil/pixdesc.h"
30 #include "avfilter.h"
31 #include "filters.h"
32 #include "formats.h"
33 #include "video.h"
34 
35 enum FilterMode {
36  MODE_NONE,
37  MODE_INTERLEAVE,
38  MODE_DEINTERLEAVE
39 };
40 
41 typedef struct IlContext {
42  const AVClass *class;
43  int luma_mode, chroma_mode, alpha_mode; ///<FilterMode
44  int luma_swap, chroma_swap, alpha_swap;
45  int nb_planes;
46  int linesize[4], chroma_height;
47  int has_alpha;
48 } IlContext;
49 
50 #define OFFSET(x) offsetof(IlContext, x)
51 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
52 
53 static const AVOption il_options[] = {
54  {"luma_mode", "select luma mode", OFFSET(luma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, .unit = "luma_mode"},
55  {"l", "select luma mode", OFFSET(luma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, .unit = "luma_mode"},
56  {"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, .unit = "luma_mode"},
57  {"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, .unit = "luma_mode"},
58  {"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, .unit = "luma_mode"},
59  {"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, .unit = "luma_mode"},
60  {"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, .unit = "luma_mode"},
61  {"chroma_mode", "select chroma mode", OFFSET(chroma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, .unit = "chroma_mode"},
62  {"c", "select chroma mode", OFFSET(chroma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, .unit = "chroma_mode"},
63  {"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, .unit = "chroma_mode"},
64  {"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, .unit = "chroma_mode"},
65  {"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, .unit = "chroma_mode"},
66  {"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, .unit = "chroma_mode"},
67  {"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, .unit = "chroma_mode"},
68  {"alpha_mode", "select alpha mode", OFFSET(alpha_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, .unit = "alpha_mode"},
69  {"a", "select alpha mode", OFFSET(alpha_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, .unit = "alpha_mode"},
70  {"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, .unit = "alpha_mode"},
71  {"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, .unit = "alpha_mode"},
72  {"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, .unit = "alpha_mode"},
73  {"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, .unit = "alpha_mode"},
74  {"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, .unit = "alpha_mode"},
75  {"luma_swap", "swap luma fields", OFFSET(luma_swap), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
76  {"ls", "swap luma fields", OFFSET(luma_swap), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
77  {"chroma_swap", "swap chroma fields", OFFSET(chroma_swap), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
78  {"cs", "swap chroma fields", OFFSET(chroma_swap), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
79  {"alpha_swap", "swap alpha fields", OFFSET(alpha_swap), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
80  {"as", "swap alpha fields", OFFSET(alpha_swap), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
81  {NULL}
82 };
83 
84 AVFILTER_DEFINE_CLASS(il);
85 
86 static int query_formats(const AVFilterContext *ctx,
87  AVFilterFormatsConfig **cfg_in,
88  AVFilterFormatsConfig **cfg_out)
89 {
90  int reject_flags = AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_HWACCEL;
91 
92  return ff_set_common_formats2(ctx, cfg_in, cfg_out,
93  ff_formats_pixdesc_filter(0, reject_flags));
94 }
95 
96 static int config_input(AVFilterLink *inlink)
97 {
98  IlContext *s = inlink->dst->priv;
99  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
100  int ret;
101 
102  s->nb_planes = av_pix_fmt_count_planes(inlink->format);
103 
104  s->has_alpha = !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA);
105  if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
106  return ret;
107 
108  s->chroma_height = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
109 
110  return 0;
111 }
112 
113 static void interleave(uint8_t *dst, uint8_t *src, int w, int h,
114  int dst_linesize, int src_linesize,
115  enum FilterMode mode, int swap)
116 {
117  const int a = swap;
118  const int b = 1 - a;
119  const int m = h >> 1;
120  int y;
121 
122  switch (mode) {
123  case MODE_DEINTERLEAVE:
124  for (y = 0; y < m; y++) {
125  memcpy(dst + dst_linesize * y , src + src_linesize * (y * 2 + a), w);
126  memcpy(dst + dst_linesize * (y + m), src + src_linesize * (y * 2 + b), w);
127  }
128  break;
129  case MODE_NONE:
130  for (y = 0; y < m; y++) {
131  memcpy(dst + dst_linesize * y * 2 , src + src_linesize * (y * 2 + a), w);
132  memcpy(dst + dst_linesize * (y * 2 + 1), src + src_linesize * (y * 2 + b), w);
133  }
134  break;
135  case MODE_INTERLEAVE:
136  for (y = 0; y < m; y++) {
137  memcpy(dst + dst_linesize * (y * 2 + a), src + src_linesize * y , w);
138  memcpy(dst + dst_linesize * (y * 2 + b), src + src_linesize * (y + m), w);
139  }
140  break;
141  }
142 }
143 
144 static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
145 {
146  IlContext *s = inlink->dst->priv;
147  AVFilterLink *outlink = inlink->dst->outputs[0];
148  AVFrame *out;
149  int comp;
150 
151  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
152  if (!out) {
153  av_frame_free(&inpicref);
154  return AVERROR(ENOMEM);
155  }
156  av_frame_copy_props(out, inpicref);
157 
158  interleave(out->data[0], inpicref->data[0],
159  s->linesize[0], inlink->h,
160  out->linesize[0], inpicref->linesize[0],
161  s->luma_mode, s->luma_swap);
162 
163  for (comp = 1; comp < (s->nb_planes - s->has_alpha); comp++) {
164  interleave(out->data[comp], inpicref->data[comp],
165  s->linesize[comp], s->chroma_height,
166  out->linesize[comp], inpicref->linesize[comp],
167  s->chroma_mode, s->chroma_swap);
168  }
169 
170  if (s->has_alpha) {
171  comp = s->nb_planes - 1;
172  interleave(out->data[comp], inpicref->data[comp],
173  s->linesize[comp], inlink->h,
174  out->linesize[comp], inpicref->linesize[comp],
175  s->alpha_mode, s->alpha_swap);
176  }
177 
178  av_frame_free(&inpicref);
179  return ff_filter_frame(outlink, out);
180 }
181 
182 static const AVFilterPad inputs[] = {
183  {
184  .name = "default",
185  .type = AVMEDIA_TYPE_VIDEO,
186  .filter_frame = filter_frame,
187  .config_props = config_input,
188  },
189 };
190 
191 const AVFilter ff_vf_il = {
192  .name = "il",
193  .description = NULL_IF_CONFIG_SMALL("Deinterleave or interleave fields."),
194  .priv_size = sizeof(IlContext),
195  FILTER_INPUTS(inputs),
196  FILTER_OUTPUTS(ff_video_default_filterpad),
197  FILTER_QUERY_FUNC2(query_formats),
198  .priv_class = &il_class,
199  .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
200  .process_command = ff_filter_process_command,
201 };
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
IlContext::luma_mode
int luma_mode
Definition: vf_il.c:43
IlContext::linesize
int linesize[4]
Definition: vf_il.c:46
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
out
FILE * out
Definition: movenc.c:55
comp
static void comp(unsigned char *dst, ptrdiff_t dst_stride, unsigned char *src, ptrdiff_t src_stride, int add)
Definition: eamad.c:81
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1062
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
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
w
uint8_t w
Definition: llviddspenc.c:38
AVOption
AVOption.
Definition: opt.h:429
b
#define b
Definition: input.c:41
MODE_INTERLEAVE
@ MODE_INTERLEAVE
Definition: vf_il.c:37
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:205
ff_vf_il
const AVFilter ff_vf_il
Definition: vf_il.c:191
video.h
IlContext::alpha_swap
int alpha_swap
Definition: vf_il.c:44
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:410
formats.h
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:3210
FilterMode
FilterMode
Definition: vp9.h:64
IlContext
Definition: vf_il.c:41
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(il)
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_il.c:144
inputs
static const AVFilterPad inputs[]
Definition: vf_il.c:182
AVFilterPad
A filter pad used for either input or output.
Definition: filters.h:38
query_formats
static int query_formats(const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
Definition: vf_il.c:86
ff_video_default_filterpad
const AVFilterPad ff_video_default_filterpad[1]
An AVFilterPad array whose only entry has name "default" and is of type AVMEDIA_TYPE_VIDEO.
Definition: video.c:37
IlContext::chroma_height
int chroma_height
Definition: vf_il.c:46
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
s
#define s(width, name)
Definition: cbs_vp9.c:198
MODE_DEINTERLEAVE
@ MODE_DEINTERLEAVE
Definition: vf_il.c:38
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:60
filters.h
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_il.c:96
AV_PIX_FMT_FLAG_ALPHA
#define AV_PIX_FMT_FLAG_ALPHA
The pixel format has an alpha channel.
Definition: pixdesc.h:147
ctx
AVFormatContext * ctx
Definition: movenc.c:49
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: filters.h:263
MODE_NONE
@ MODE_NONE
Definition: vf_il.c:36
IlContext::has_alpha
int has_alpha
Definition: vf_il.c:47
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
IlContext::alpha_mode
int alpha_mode
FilterMode.
Definition: vf_il.c:43
AVFilterFormatsConfig
Lists of formats / etc.
Definition: avfilter.h:111
interleave
static void interleave(uint8_t *dst, uint8_t *src, int w, int h, int dst_linesize, int src_linesize, enum FilterMode mode, int swap)
Definition: vf_il.c:113
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
dst
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
Definition: dsp.h:83
ff_filter_process_command
int ff_filter_process_command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Generic processing of user supplied commands that are set in the same way as the filter options.
Definition: avfilter.c:901
il_options
static const AVOption il_options[]
Definition: vf_il.c:53
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
AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
Definition: avfilter.h:182
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
IlContext::chroma_swap
int chroma_swap
Definition: vf_il.c:44
FILTER_QUERY_FUNC2
#define FILTER_QUERY_FUNC2(func)
Definition: filters.h:239
AVFilterPad::name
const char * name
Pad name.
Definition: filters.h:44
AVFilter
Filter definition.
Definition: avfilter.h:201
FLAGS
#define FLAGS
Definition: vf_il.c:51
ret
ret
Definition: filter_design.txt:187
mode
mode
Definition: ebur128.h:83
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Underlying C type is int.
Definition: opt.h:259
avfilter.h
AVFilterContext
An instance of a filter.
Definition: avfilter.h:457
desc
const char * desc
Definition: libsvtav1.c:79
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
IlContext::luma_swap
int luma_swap
Definition: vf_il.c:44
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
OFFSET
#define OFFSET(x)
Definition: vf_il.c:50
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Underlying C type is int.
Definition: opt.h:327
IlContext::chroma_mode
int chroma_mode
Definition: vf_il.c:43
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
h
h
Definition: vp9dsp_template.c:2070
IlContext::nb_planes
int nb_planes
Definition: vf_il.c:45
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
src
#define src
Definition: vp8dsp.c:248
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