FFmpeg  4.4.6
vf_vflip.c
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1 /*
2  * Copyright (c) 2007 Bobby Bingham
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 /**
22  * @file
23  * video vertical flip filter
24  */
25 
26 #include "libavutil/internal.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/pixdesc.h"
29 #include "avfilter.h"
30 #include "internal.h"
31 #include "video.h"
32 
33 typedef struct FlipContext {
34  const AVClass *class;
35  int vsub; ///< vertical chroma subsampling
36  int bayer;
37 } FlipContext;
38 
39 static const AVOption vflip_options[] = {
40  { NULL }
41 };
42 
44 
45 static int config_input(AVFilterLink *link)
46 {
47  FlipContext *flip = link->dst->priv;
49 
50  flip->vsub = desc->log2_chroma_h;
51  flip->bayer = !!(desc->flags & AV_PIX_FMT_FLAG_BAYER);
52 
53  return 0;
54 }
55 
56 static AVFrame *get_video_buffer(AVFilterLink *link, int w, int h)
57 {
58  FlipContext *flip = link->dst->priv;
59  AVFrame *frame;
60  int i;
61 
62  frame = ff_get_video_buffer(link->dst->outputs[0], w, h);
63  if (!frame)
64  return NULL;
65 
66  for (i = 0; i < 4; i ++) {
67  int vsub = i == 1 || i == 2 ? flip->vsub : 0;
68  int height = AV_CEIL_RSHIFT(h, vsub);
69 
70  if (frame->data[i]) {
71  frame->data[i] += (height - 1) * frame->linesize[i];
72  frame->linesize[i] = -frame->linesize[i];
73  }
74  }
75 
76  return frame;
77 }
78 
79 static int flip_bayer(AVFilterLink *link, AVFrame *in)
80 {
81  AVFilterContext *ctx = link->dst;
82  AVFilterLink *outlink = ctx->outputs[0];
83  AVFrame *out;
84  uint8_t *inrow = in->data[0], *outrow;
85  int i, width = outlink->w << (av_pix_fmt_desc_get(link->format)->comp[0].step > 1);
86  if (outlink->h & 1) {
87  av_log(ctx, AV_LOG_ERROR, "Bayer vertical flip needs even height\n");
88  return AVERROR_INVALIDDATA;
89  }
90 
91  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
92  if (!out) {
93  av_frame_free(&in);
94  return AVERROR(ENOMEM);
95  }
97  outrow = out->data[0] + out->linesize[0] * (outlink->h - 2);
98  for (i = 0; i < outlink->h >> 1; i++) {
99  memcpy(outrow, inrow, width);
100  memcpy(outrow + out->linesize[0], inrow + in->linesize[0], width);
101  inrow += 2 * in->linesize[0];
102  outrow -= 2 * out->linesize[0];
103  }
104  av_frame_free(&in);
105  return ff_filter_frame(outlink, out);
106 }
107 
109 {
110  FlipContext *flip = link->dst->priv;
111  int i;
112 
113  if (flip->bayer)
114  return flip_bayer(link, frame);
115 
116  for (i = 0; i < 4; i ++) {
117  int vsub = i == 1 || i == 2 ? flip->vsub : 0;
118  int height = AV_CEIL_RSHIFT(link->h, vsub);
119 
120  if (frame->data[i]) {
121  frame->data[i] += (height - 1) * frame->linesize[i];
122  frame->linesize[i] = -frame->linesize[i];
123  }
124  }
125 
126  return ff_filter_frame(link->dst->outputs[0], frame);
127 }
129  {
130  .name = "default",
131  .type = AVMEDIA_TYPE_VIDEO,
132  .get_video_buffer = get_video_buffer,
133  .filter_frame = filter_frame,
134  .config_props = config_input,
135  },
136  { NULL }
137 };
138 
140  {
141  .name = "default",
142  .type = AVMEDIA_TYPE_VIDEO,
143  },
144  { NULL }
145 };
146 
148  .name = "vflip",
149  .description = NULL_IF_CONFIG_SMALL("Flip the input video vertically."),
150  .priv_size = sizeof(FlipContext),
151  .priv_class = &vflip_class,
155 };
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
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)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
uint8_t
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1096
Main libavfilter public API header.
#define flags(name, subs,...)
Definition: cbs_av1.c:572
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
#define NULL
Definition: coverity.c:32
static AVFrame * frame
#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:126
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#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
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:658
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
int i
Definition: input.c:407
static void flip(AVCodecContext *avctx, AVFrame *frame)
Definition: rawdec.c:137
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
const char * desc
Definition: libsvtav1.c:79
uint8_t w
Definition: llviddspenc.c:39
AVOptions.
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
#define AV_PIX_FMT_FLAG_BAYER
The pixel format is following a Bayer pattern.
Definition: pixdesc.h:184
Describe the class of an AVClass context structure.
Definition: log.h:67
int step
Number of elements between 2 horizontally consecutive pixels.
Definition: pixdesc.h:41
An instance of a filter.
Definition: avfilter.h:341
void * priv
private data for use by the filter
Definition: avfilter.h:356
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:353
A filter pad used for either input or output.
Definition: internal.h:54
const char * name
Pad name.
Definition: internal.h:60
Filter definition.
Definition: avfilter.h:145
const char * name
Filter name.
Definition: avfilter.h:149
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:332
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:349
AVOption.
Definition: opt.h:248
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
int bayer
Definition: vf_vflip.c:36
int vsub
vertical chroma subsampling
Definition: vf_vflip.c:35
#define av_log(a,...)
FILE * out
Definition: movenc.c:54
AVFormatContext * ctx
Definition: movenc.c:48
#define height
#define width
static int flip_bayer(AVFilterLink *link, AVFrame *in)
Definition: vf_vflip.c:79
static AVFrame * get_video_buffer(AVFilterLink *link, int w, int h)
Definition: vf_vflip.c:56
static const AVOption vflip_options[]
Definition: vf_vflip.c:39
AVFilter ff_vf_vflip
Definition: vf_vflip.c:147
AVFILTER_DEFINE_CLASS(vflip)
static const AVFilterPad avfilter_vf_vflip_outputs[]
Definition: vf_vflip.c:139
static const AVFilterPad avfilter_vf_vflip_inputs[]
Definition: vf_vflip.c:128
static int filter_frame(AVFilterLink *link, AVFrame *frame)
Definition: vf_vflip.c:108
static int config_input(AVFilterLink *link)
Definition: vf_vflip.c:45
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