FFmpeg  4.3.8
vf_weave.c
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1 /*
2  * Copyright (c) 2013 Paul B Mahol
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 "internal.h"
26 
27 typedef struct WeaveContext {
28  const AVClass *class;
31  int nb_planes;
32  int planeheight[4];
33  int outheight[4];
34  int linesize[4];
35 
37 } WeaveContext;
38 
39 #define OFFSET(x) offsetof(WeaveContext, x)
40 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
41 
42 static const AVOption weave_options[] = {
43  { "first_field", "set first field", OFFSET(first_field), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "field"},
44  { "top", "set top field first", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "field"},
45  { "t", "set top field first", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "field"},
46  { "bottom", "set bottom field first", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "field"},
47  { "b", "set bottom field first", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "field"},
48  { NULL }
49 };
50 
52 
54 {
56  int ret;
57 
58  for (int fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
60 
61  if (!(desc->flags & AV_PIX_FMT_FLAG_PAL) &&
62  !(desc->flags & AV_PIX_FMT_FLAG_HWACCEL)) {
63  if ((ret = ff_add_format(&formats, fmt)) < 0) {
64  ff_formats_unref(&formats);
65  return ret;
66  }
67  }
68  }
69 
70  return ff_set_common_formats(ctx, formats);
71 }
72 
73 static int config_props_output(AVFilterLink *outlink)
74 {
75  AVFilterContext *ctx = outlink->src;
76  WeaveContext *s = ctx->priv;
77  AVFilterLink *inlink = ctx->inputs[0];
79  int ret;
80 
81  if (!s->double_weave) {
82  outlink->time_base.num = inlink->time_base.num * 2;
83  outlink->time_base.den = inlink->time_base.den;
84  outlink->frame_rate.num = inlink->frame_rate.num;
85  outlink->frame_rate.den = inlink->frame_rate.den * 2;
86  }
87  outlink->w = inlink->w;
88  outlink->h = inlink->h * 2;
89 
90  if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
91  return ret;
92 
93  s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
94  s->planeheight[0] = s->planeheight[3] = inlink->h;
95 
96  s->outheight[1] = s->outheight[2] = AV_CEIL_RSHIFT(2*inlink->h, desc->log2_chroma_h);
97  s->outheight[0] = s->outheight[3] = 2*inlink->h;
98 
100 
101  return 0;
102 }
103 
104 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
105 {
106  AVFilterContext *ctx = inlink->dst;
107  WeaveContext *s = ctx->priv;
108  AVFilterLink *outlink = ctx->outputs[0];
109  AVFrame *out;
110  int i;
111  int weave;
112  int field1, field2;
113 
114  if (!s->prev) {
115  s->prev = in;
116  return 0;
117  }
118 
119  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
120  if (!out) {
121  av_frame_free(&in);
122  av_frame_free(&s->prev);
123  return AVERROR(ENOMEM);
124  }
125  av_frame_copy_props(out, in);
126 
127  weave = (s->double_weave && !(inlink->frame_count_out & 1));
128  field1 = weave ? s->first_field : (!s->first_field);
129  field2 = weave ? (!s->first_field) : s->first_field;
130  for (i = 0; i < s->nb_planes; i++) {
131  const int compensation = 2*s->planeheight[i] > s->outheight[i];
132  av_image_copy_plane(out->data[i] + out->linesize[i] * field1,
133  out->linesize[i] * 2,
134  in->data[i], in->linesize[i],
135  s->linesize[i], s->planeheight[i] - compensation * field1);
136  av_image_copy_plane(out->data[i] + out->linesize[i] * field2,
137  out->linesize[i] * 2,
138  s->prev->data[i], s->prev->linesize[i],
139  s->linesize[i], s->planeheight[i] - compensation * field2);
140  }
141 
142  out->pts = s->double_weave ? s->prev->pts : in->pts / 2;
143  out->interlaced_frame = 1;
144  out->top_field_first = !s->first_field;
145 
146  if (!s->double_weave)
147  av_frame_free(&in);
148  av_frame_free(&s->prev);
149  if (s->double_weave)
150  s->prev = in;
151  return ff_filter_frame(outlink, out);
152 }
153 
155 {
156  WeaveContext *s = ctx->priv;
157 
158  av_frame_free(&s->prev);
159 }
160 
161 static const AVFilterPad weave_inputs[] = {
162  {
163  .name = "default",
164  .type = AVMEDIA_TYPE_VIDEO,
165  .filter_frame = filter_frame,
166  },
167  { NULL }
168 };
169 
170 static const AVFilterPad weave_outputs[] = {
171  {
172  .name = "default",
173  .type = AVMEDIA_TYPE_VIDEO,
174  .config_props = config_props_output,
175  },
176  { NULL }
177 };
178 
180  .name = "weave",
181  .description = NULL_IF_CONFIG_SMALL("Weave input video fields into frames."),
182  .priv_size = sizeof(WeaveContext),
183  .priv_class = &weave_class,
185  .uninit = uninit,
186  .inputs = weave_inputs,
187  .outputs = weave_outputs,
188 };
189 
191 {
192  WeaveContext *s = ctx->priv;
193 
194  if (!strcmp(ctx->filter->name, "doubleweave"))
195  s->double_weave = 1;
196 
197  return 0;
198 }
199 
200 #define doubleweave_options weave_options
201 AVFILTER_DEFINE_CLASS(doubleweave);
202 
204  .name = "doubleweave",
205  .description = NULL_IF_CONFIG_SMALL("Weave input video fields into double number of frames."),
206  .priv_size = sizeof(WeaveContext),
207  .priv_class = &doubleweave_class,
209  .init = init,
210  .uninit = uninit,
211  .inputs = weave_inputs,
212  .outputs = weave_outputs,
213 };
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:132
static int query_formats(AVFilterContext *ctx)
Definition: vf_weave.c:53
#define NULL
Definition: coverity.c:32
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2549
This structure describes decoded (raw) audio or video data.
Definition: frame.h:300
AVOption.
Definition: opt.h:246
misc image utilities
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2589
Main libavfilter public API header.
const char * desc
Definition: nvenc.c:79
static const AVFilterPad weave_inputs[]
Definition: vf_weave.c:161
int num
Numerator.
Definition: rational.h:59
int nb_planes
Definition: vf_weave.c:31
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:104
const char * name
Pad name.
Definition: internal.h:60
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:346
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1075
AVFilter ff_vf_weave
Definition: vf_weave.c:179
#define av_cold
Definition: attributes.h:88
AVOptions.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:393
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:447
A filter pad used for either input or output.
Definition: internal.h:54
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
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:605
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
#define OFFSET(x)
Definition: vf_weave.c:39
#define AVERROR(e)
Definition: error.h:43
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:188
void * priv
private data for use by the filter
Definition: avfilter.h:353
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
Definition: pixdesc.h:140
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:350
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
AVFormatContext * ctx
Definition: movenc.c:48
static av_cold int init(AVFilterContext *ctx)
Definition: vf_weave.c:190
#define s(width, name)
Definition: cbs_vp9.c:257
static const AVOption weave_options[]
Definition: vf_weave.c:42
static const AVFilterPad weave_outputs[]
Definition: vf_weave.c:170
int double_weave
Definition: vf_weave.c:30
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:331
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Describe the class of an AVClass context structure.
Definition: log.h:67
int outheight[4]
Definition: vf_weave.c:33
Filter definition.
Definition: avfilter.h:144
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
AVFilter ff_vf_doubleweave
Definition: vf_weave.c:203
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_weave.c:104
void ff_formats_unref(AVFilterFormats **ref)
If *ref is non-NULL, remove *ref as a reference to the format list it currently points to...
Definition: formats.c:521
const char * name
Filter name.
Definition: avfilter.h:148
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_weave.c:154
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
int planeheight[4]
Definition: vf_weave.c:32
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:314
int linesize[4]
Definition: vf_weave.c:34
AVFrame * prev
Definition: vf_weave.c:36
int den
Denominator.
Definition: rational.h:60
#define FLAGS
Definition: vf_weave.c:40
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:452
A list of supported formats for one end of a filter link.
Definition: formats.h:64
An instance of a filter.
Definition: avfilter.h:338
AVFILTER_DEFINE_CLASS(weave)
FILE * out
Definition: movenc.c:54
static int config_props_output(AVFilterLink *outlink)
Definition: vf_weave.c:73
formats
Definition: signature.h:48
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
Definition: imgutils.c:338
internal API functions
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:341
int first_field
Definition: vf_weave.c:29
for(j=16;j >0;--j)
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:659
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58