FFmpeg  4.0
vf_repeatfields.c
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1 /*
2  * Copyright (c) 2003 Tobias Diedrich
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (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
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License along
17  * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19  */
20 
21 #include "libavutil/imgutils.h"
22 #include "avfilter.h"
23 #include "internal.h"
24 
25 typedef struct RepeatFieldsContext {
26  const AVClass *class;
27  int state;
28  int nb_planes;
29  int linesize[4];
30  int planeheight[4];
33 
35 {
36  RepeatFieldsContext *s = ctx->priv;
37 
38  av_frame_free(&s->frame);
39 }
40 
42 {
43  static const enum AVPixelFormat pixel_fmts_eq[] = {
51  };
52 
53  AVFilterFormats *fmts_list = ff_make_format_list(pixel_fmts_eq);
54  if (!fmts_list)
55  return AVERROR(ENOMEM);
56  return ff_set_common_formats(ctx, fmts_list);
57 }
58 
59 static int config_input(AVFilterLink *inlink)
60 {
61  RepeatFieldsContext *s = inlink->dst->priv;
63  int ret;
64 
65  if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
66  return ret;
67 
68  s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
69  s->planeheight[0] = s->planeheight[3] = inlink->h;
70 
72 
73  return 0;
74 }
75 
76 static void update_pts(AVFilterLink *link, AVFrame *f, int64_t pts, int fields)
77 {
78  if (av_cmp_q(link->frame_rate, (AVRational){30000, 1001}) == 0 &&
79  av_cmp_q(link->time_base, (AVRational){1001, 60000}) <= 0
80  ) {
81  f->pts = pts + av_rescale_q(fields, (AVRational){1001, 60000}, link->time_base);
82  } else
83  f->pts = AV_NOPTS_VALUE;
84 }
85 
86 static int filter_frame(AVFilterLink *inlink, AVFrame *in) {
87  AVFilterContext *ctx = inlink->dst;
88  AVFilterLink *outlink = inlink->dst->outputs[0];
89  RepeatFieldsContext *s = ctx->priv;
90  AVFrame *out;
91  int ret, i;
92  int state = s->state;
93 
94  if (!s->frame) {
95  s->frame = av_frame_clone(in);
96  if (!s->frame)
97  return AVERROR(ENOMEM);
98  s->frame->pts = AV_NOPTS_VALUE;
99  }
100 
101  out = s->frame;
102 
103  if ((state == 0 && !in->top_field_first) ||
104  (state == 1 && in->top_field_first)) {
105  av_log(ctx, AV_LOG_WARNING, "Unexpected field flags: "
106  "state=%d top_field_first=%d repeat_first_field=%d\n",
107  state, in->top_field_first, in->repeat_pict);
108  state ^= 1;
109  }
110 
111  if (state == 0) {
112  AVFrame *new;
113 
114  new = av_frame_clone(in);
115  if (!new)
116  return AVERROR(ENOMEM);
117 
118  ret = ff_filter_frame(outlink, new);
119 
120  if (in->repeat_pict) {
122  update_pts(outlink, out, in->pts, 2);
123  for (i = 0; i < s->nb_planes; i++) {
124  av_image_copy_plane(out->data[i], out->linesize[i] * 2,
125  in->data[i], in->linesize[i] * 2,
126  s->linesize[i], s->planeheight[i] / 2);
127  }
128  state = 1;
129  }
130  } else {
131  for (i = 0; i < s->nb_planes; i++) {
133  av_image_copy_plane(out->data[i] + out->linesize[i], out->linesize[i] * 2,
134  in->data[i] + in->linesize[i], in->linesize[i] * 2,
135  s->linesize[i], s->planeheight[i] / 2);
136  }
137 
138  ret = ff_filter_frame(outlink, av_frame_clone(out));
139 
140  if (in->repeat_pict) {
141  AVFrame *new;
142 
143  new = av_frame_clone(in);
144  if (!new)
145  return AVERROR(ENOMEM);
146 
147  ret = ff_filter_frame(outlink, new);
148  state = 0;
149  } else {
151  update_pts(outlink, out, in->pts, 1);
152  for (i = 0; i < s->nb_planes; i++) {
153  av_image_copy_plane(out->data[i], out->linesize[i] * 2,
154  in->data[i], in->linesize[i] * 2,
155  s->linesize[i], s->planeheight[i] / 2);
156  }
157  }
158  }
159 
160  s->state = state;
161 
162  av_frame_free(&in);
163  return ret;
164 }
165 
167  {
168  .name = "default",
169  .type = AVMEDIA_TYPE_VIDEO,
170  .filter_frame = filter_frame,
171  .config_props = config_input,
172  },
173  { NULL }
174 };
175 
177  {
178  .name = "default",
179  .type = AVMEDIA_TYPE_VIDEO,
180  },
181  { NULL }
182 };
183 
185  .name = "repeatfields",
186  .description = NULL_IF_CONFIG_SMALL("Hard repeat fields based on MPEG repeat field flag."),
187  .priv_size = sizeof(RepeatFieldsContext),
188  .uninit = uninit,
189  .inputs = repeatfields_inputs,
190  .outputs = repeatfields_outputs,
192 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
static const AVFilterPad repeatfields_outputs[]
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2363
This structure describes decoded (raw) audio or video data.
Definition: frame.h:218
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:67
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2403
Main libavfilter public API header.
static int config_input(AVFilterLink *inlink)
const char * desc
Definition: nvenc.c:65
int repeat_pict
When decoding, this signals how much the picture must be delayed.
Definition: frame.h:360
static int query_formats(AVFilterContext *ctx)
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
const char * name
Pad name.
Definition: internal.h:60
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1080
#define av_cold
Definition: attributes.h:82
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:311
#define av_log(a,...)
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 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:568
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
#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:202
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
void * priv
private data for use by the filter
Definition: avfilter.h:353
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:66
static const AVFilterPad repeatfields_inputs[]
AVFormatContext * ctx
Definition: movenc.c:48
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:538
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:249
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
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:68
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
Rational number (pair of numerator and denominator).
Definition: rational.h:58
const char * name
Filter name.
Definition: avfilter.h:148
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
static int64_t pts
int av_frame_make_writable(AVFrame *frame)
Ensure that the frame data is writable, avoiding data copy if possible.
Definition: frame.c:609
AVFilter ff_vf_repeatfields
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:232
static av_cold void uninit(AVFilterContext *ctx)
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:89
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
Y , 8bpp.
Definition: pixfmt.h:70
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:69
static void update_pts(AVFilterLink *link, AVFrame *f, int64_t pts, int fields)
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:370
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
FILE * out
Definition: movenc.c:54
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
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58