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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;
30  int nb_planes;
31  int planeheight[4];
32  int linesize[4];
33 
35 } WeaveContext;
36 
37 #define OFFSET(x) offsetof(WeaveContext, x)
38 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
39 
40 static const AVOption weave_options[] = {
41  { "first_field", "set first field", OFFSET(first_field), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "field"},
42  { "top", "set top field first", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "field"},
43  { "t", "set top field first", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "field"},
44  { "bottom", "set bottom field first", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "field"},
45  { "b", "set bottom field first", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "field"},
46  { NULL }
47 };
48 
50 
51 static int config_props_output(AVFilterLink *outlink)
52 {
53  AVFilterContext *ctx = outlink->src;
54  WeaveContext *s = ctx->priv;
55  AVFilterLink *inlink = ctx->inputs[0];
57  int ret;
58 
59  outlink->time_base.num = inlink->time_base.num * 2;
60  outlink->time_base.den = inlink->time_base.den;
61  outlink->frame_rate.num = inlink->frame_rate.num;
62  outlink->frame_rate.den = inlink->frame_rate.den * 2;
63  outlink->w = inlink->w;
64  outlink->h = inlink->h * 2;
65 
66  if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
67  return ret;
68 
69  s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
70  s->planeheight[0] = s->planeheight[3] = inlink->h;
71 
73 
74  return 0;
75 }
76 
77 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
78 {
79  AVFilterContext *ctx = inlink->dst;
80  WeaveContext *s = ctx->priv;
81  AVFilterLink *outlink = ctx->outputs[0];
82  AVFrame *out;
83  int i;
84 
85  if (!s->prev) {
86  s->prev = in;
87  return 0;
88  }
89 
90  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
91  if (!out) {
92  av_frame_free(&in);
93  av_frame_free(&s->prev);
94  return AVERROR(ENOMEM);
95  }
96  av_frame_copy_props(out, in);
97 
98  for (i = 0; i < s->nb_planes; i++) {
99  av_image_copy_plane(out->data[i] + out->linesize[i] * s->first_field,
100  out->linesize[i] * 2,
101  in->data[i], in->linesize[i],
102  s->linesize[i], s->planeheight[i]);
103  av_image_copy_plane(out->data[i] + out->linesize[i] * !s->first_field,
104  out->linesize[i] * 2,
105  s->prev->data[i], s->prev->linesize[i],
106  s->linesize[i], s->planeheight[i]);
107  }
108 
109  out->pts = in->pts / 2;
110  out->interlaced_frame = 1;
111  out->top_field_first = !s->first_field;
112 
113  av_frame_free(&in);
114  av_frame_free(&s->prev);
115  return ff_filter_frame(outlink, out);
116 }
117 
119 {
120  WeaveContext *s = ctx->priv;
121 
122  av_frame_free(&s->prev);
123 }
124 
125 static const AVFilterPad weave_inputs[] = {
126  {
127  .name = "default",
128  .type = AVMEDIA_TYPE_VIDEO,
129  .filter_frame = filter_frame,
130  },
131  { NULL }
132 };
133 
134 static const AVFilterPad weave_outputs[] = {
135  {
136  .name = "default",
137  .type = AVMEDIA_TYPE_VIDEO,
138  .config_props = config_props_output,
139  },
140  { NULL }
141 };
142 
144  .name = "weave",
145  .description = NULL_IF_CONFIG_SMALL("Weave input video fields into frames."),
146  .priv_size = sizeof(WeaveContext),
147  .priv_class = &weave_class,
148  .uninit = uninit,
149  .inputs = weave_inputs,
150  .outputs = weave_outputs,
151 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2333
This structure describes decoded (raw) audio or video data.
Definition: frame.h:187
AVOption.
Definition: opt.h:246
misc image utilities
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2373
Main libavfilter public API header.
const char * desc
Definition: nvenc.c:60
static const AVFilterPad weave_inputs[]
Definition: vf_weave.c:125
int num
Numerator.
Definition: rational.h:59
int nb_planes
Definition: vf_weave.c:30
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:92
const char * name
Pad name.
Definition: internal.h:60
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:331
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1125
AVFilter ff_vf_weave
Definition: vf_weave.c:143
#define av_cold
Definition: attributes.h:82
AVOptions.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:271
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:325
static int first_field(const struct video_data *s)
Definition: v4l2.c:230
A filter pad used for either input or output.
Definition: internal.h:54
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:37
#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:163
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:179
void * priv
private data for use by the filter
Definition: avfilter.h:338
AVFormatContext * ctx
Definition: movenc.c:48
static const AVOption weave_options[]
Definition: vf_weave.c:40
static const AVFilterPad weave_outputs[]
Definition: vf_weave.c:134
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:386
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:376
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:218
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,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;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);returnNULL;}returnac;}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;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->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);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
Describe the class of an AVClass context structure.
Definition: log.h:67
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
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_weave.c:77
const char * name
Filter name.
Definition: avfilter.h:148
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_weave.c:118
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:335
int planeheight[4]
Definition: vf_weave.c:31
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:201
int linesize[4]
Definition: vf_weave.c:32
AVFrame * prev
Definition: vf_weave.c:34
int den
Denominator.
Definition: rational.h:60
#define FLAGS
Definition: vf_weave.c:38
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:330
An instance of a filter.
Definition: avfilter.h:323
AVFILTER_DEFINE_CLASS(weave)
FILE * out
Definition: movenc.c:54
static int config_props_output(AVFilterLink *outlink)
Definition: vf_weave.c:51
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:337
internal API functions
int first_field
Definition: vf_weave.c:29
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:596
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58