FFmpeg  4.4
vf_hflip.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2007 Benoit Fouet
3  * Copyright (c) 2010 Stefano Sabatini
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  * horizontal flip filter
25  */
26 
27 #include <string.h>
28 
29 #include "libavutil/opt.h"
30 #include "avfilter.h"
31 #include "formats.h"
32 #include "hflip.h"
33 #include "internal.h"
34 #include "video.h"
35 #include "libavutil/pixdesc.h"
36 #include "libavutil/internal.h"
37 #include "libavutil/intreadwrite.h"
38 #include "libavutil/imgutils.h"
39 
40 static const AVOption hflip_options[] = {
41  { NULL }
42 };
43 
45 
47 {
49  int fmt, ret;
50 
51  for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
53  if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL ||
55  (desc->log2_chroma_w != desc->log2_chroma_h &&
56  desc->comp[0].plane == desc->comp[1].plane)) &&
57  (ret = ff_add_format(&pix_fmts, fmt)) < 0)
58  return ret;
59  }
60 
62 }
63 
64 static void hflip_byte_c(const uint8_t *src, uint8_t *dst, int w)
65 {
66  int j;
67 
68  for (j = 0; j < w; j++)
69  dst[j] = src[-j];
70 }
71 
72 static void hflip_short_c(const uint8_t *ssrc, uint8_t *ddst, int w)
73 {
74  const uint16_t *src = (const uint16_t *)ssrc;
75  uint16_t *dst = (uint16_t *)ddst;
76  int j;
77 
78  for (j = 0; j < w; j++)
79  dst[j] = src[-j];
80 }
81 
82 static void hflip_dword_c(const uint8_t *ssrc, uint8_t *ddst, int w)
83 {
84  const uint32_t *src = (const uint32_t *)ssrc;
85  uint32_t *dst = (uint32_t *)ddst;
86  int j;
87 
88  for (j = 0; j < w; j++)
89  dst[j] = src[-j];
90 }
91 
92 static void hflip_b24_c(const uint8_t *src, uint8_t *dst, int w)
93 {
94  const uint8_t *in = src;
95  uint8_t *out = dst;
96  int j;
97 
98  for (j = 0; j < w; j++, out += 3, in -= 3) {
99  int32_t v = AV_RB24(in);
100 
101  AV_WB24(out, v);
102  }
103 }
104 
105 static void hflip_b48_c(const uint8_t *src, uint8_t *dst, int w)
106 {
107  const uint8_t *in = src;
108  uint8_t *out = dst;
109  int j;
110 
111  for (j = 0; j < w; j++, out += 6, in -= 6) {
112  int64_t v = AV_RB48(in);
113 
114  AV_WB48(out, v);
115  }
116 }
117 
118 static void hflip_qword_c(const uint8_t *ssrc, uint8_t *ddst, int w)
119 {
120  const uint64_t *src = (const uint64_t *)ssrc;
121  uint64_t *dst = (uint64_t *)ddst;
122  int j;
123 
124  for (j = 0; j < w; j++)
125  dst[j] = src[-j];
126 }
127 
128 static int config_props(AVFilterLink *inlink)
129 {
130  FlipContext *s = inlink->dst->priv;
131  const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
132  const int hsub = pix_desc->log2_chroma_w;
133  const int vsub = pix_desc->log2_chroma_h;
134  int nb_planes;
135 
136  av_image_fill_max_pixsteps(s->max_step, NULL, pix_desc);
137  s->planewidth[0] = s->planewidth[3] = inlink->w;
138  s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
139  s->planeheight[0] = s->planeheight[3] = inlink->h;
140  s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
141  s->bayer_plus1 = !!(pix_desc->flags & AV_PIX_FMT_FLAG_BAYER) + 1;
142 
143  nb_planes = av_pix_fmt_count_planes(inlink->format);
144 
145  return ff_hflip_init(s, s->max_step, nb_planes);
146 }
147 
148 int ff_hflip_init(FlipContext *s, int step[4], int nb_planes)
149 {
150  int i;
151 
152  for (i = 0; i < nb_planes; i++) {
153  step[i] *= s->bayer_plus1;
154  switch (step[i]) {
155  case 1: s->flip_line[i] = hflip_byte_c; break;
156  case 2: s->flip_line[i] = hflip_short_c; break;
157  case 3: s->flip_line[i] = hflip_b24_c; break;
158  case 4: s->flip_line[i] = hflip_dword_c; break;
159  case 6: s->flip_line[i] = hflip_b48_c; break;
160  case 8: s->flip_line[i] = hflip_qword_c; break;
161  default:
162  return AVERROR_BUG;
163  }
164  }
165  if (ARCH_X86)
166  ff_hflip_init_x86(s, step, nb_planes);
167 
168  return 0;
169 }
170 
171 typedef struct ThreadData {
172  AVFrame *in, *out;
173 } ThreadData;
174 
175 static int filter_slice(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
176 {
177  FlipContext *s = ctx->priv;
178  ThreadData *td = arg;
179  AVFrame *in = td->in;
180  AVFrame *out = td->out;
181  uint8_t *inrow, *outrow;
182  int i, plane, step;
183 
184  for (plane = 0; plane < 4 && in->data[plane] && in->linesize[plane]; plane++) {
185  const int width = s->planewidth[plane] / s->bayer_plus1;
186  const int height = s->planeheight[plane];
187  const int start = (height * job ) / nb_jobs;
188  const int end = (height * (job+1)) / nb_jobs;
189 
190  step = s->max_step[plane];
191 
192  outrow = out->data[plane] + start * out->linesize[plane];
193  inrow = in ->data[plane] + start * in->linesize[plane] + (width - 1) * step;
194  for (i = start; i < end; i++) {
195  s->flip_line[plane](inrow, outrow, width);
196 
197  inrow += in ->linesize[plane];
198  outrow += out->linesize[plane];
199  }
200  }
201 
202  return 0;
203 }
204 
205 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
206 {
207  AVFilterContext *ctx = inlink->dst;
208  AVFilterLink *outlink = ctx->outputs[0];
209  ThreadData td;
210  AVFrame *out;
211 
212  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
213  if (!out) {
214  av_frame_free(&in);
215  return AVERROR(ENOMEM);
216  }
218 
219  /* copy palette if required */
221  memcpy(out->data[1], in->data[1], AVPALETTE_SIZE);
222 
223  td.in = in, td.out = out;
224  ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
225 
226  av_frame_free(&in);
227  return ff_filter_frame(outlink, out);
228 }
229 
231  {
232  .name = "default",
233  .type = AVMEDIA_TYPE_VIDEO,
234  .filter_frame = filter_frame,
235  .config_props = config_props,
236  },
237  { NULL }
238 };
239 
241  {
242  .name = "default",
243  .type = AVMEDIA_TYPE_VIDEO,
244  },
245  { NULL }
246 };
247 
249  .name = "hflip",
250  .description = NULL_IF_CONFIG_SMALL("Horizontally flip the input video."),
251  .priv_size = sizeof(FlipContext),
252  .priv_class = &hflip_class,
257 };
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
int32_t
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1094
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:802
Main libavfilter public API header.
#define AV_RB24
Definition: intreadwrite.h:64
#define flags(name, subs,...)
Definition: cbs_av1.c:561
#define s(width, name)
Definition: cbs_vp9.c:257
#define FFMIN(a, b)
Definition: common.h:105
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
#define ARCH_X86
Definition: config.h:39
#define NULL
Definition: coverity.c:32
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:587
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:332
#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 AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:117
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
#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
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4], const AVPixFmtDescriptor *pixdesc)
Compute the max pixel step for each plane of an image with a format described by pixdesc.
Definition: imgutils.c:35
void ff_hflip_init_x86(FlipContext *s, int step[4], int nb_planes)
Definition: vf_hflip_init.c:31
misc image utilities
int i
Definition: input.c:407
#define AV_WB24(p, d)
Definition: intreadwrite.h:450
#define AV_WB48(p, darg)
Definition: intreadwrite.h:481
#define AV_RB48(x)
Definition: intreadwrite.h:472
const char * arg
Definition: jacosubdec.c:66
static void hflip_b24_c(const uint8_t *src, uint8_t *dst, int w)
Definition: vf_hflip.c:92
static void hflip_short_c(const uint8_t *ssrc, uint8_t *ddst, int w)
Definition: vf_hflip.c:72
static void hflip_qword_c(const uint8_t *ssrc, uint8_t *ddst, int w)
Definition: vf_hflip.c:118
static int query_formats(AVFilterContext *ctx)
Definition: vf_hflip.c:46
static void hflip_b48_c(const uint8_t *src, uint8_t *dst, int w)
Definition: vf_hflip.c:105
int ff_hflip_init(FlipContext *s, int step[4], int nb_planes)
Definition: vf_hflip.c:148
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_hflip.c:205
static void hflip_dword_c(const uint8_t *ssrc, uint8_t *ddst, int w)
Definition: vf_hflip.c:82
static const AVFilterPad avfilter_vf_hflip_inputs[]
Definition: vf_hflip.c:230
AVFILTER_DEFINE_CLASS(hflip)
static int config_props(AVFilterLink *inlink)
Definition: vf_hflip.c:128
AVFilter ff_vf_hflip
Definition: vf_hflip.c:248
static int filter_slice(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
Definition: vf_hflip.c:175
static void hflip_byte_c(const uint8_t *src, uint8_t *dst, int w)
Definition: vf_hflip.c:64
static const AVOption hflip_options[]
Definition: vf_hflip.c:40
static const AVFilterPad avfilter_vf_hflip_outputs[]
Definition: vf_hflip.c:240
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
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:303
const char * desc
Definition: libsvtav1.c:79
uint8_t w
Definition: llviddspenc.c:39
AVOptions.
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2613
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
#define AV_PIX_FMT_FLAG_BITSTREAM
All values of a component are bit-wise packed end to end.
Definition: pixdesc.h:136
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
Definition: pixdesc.h:140
#define AV_PIX_FMT_FLAG_BAYER
The pixel format is following a Bayer pattern.
Definition: pixdesc.h:184
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:132
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
#define td
Definition: regdef.h:70
An instance of a filter.
Definition: avfilter.h:341
void * priv
private data for use by the filter
Definition: avfilter.h:356
A list of supported formats for one end of a filter link.
Definition: formats.h:65
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
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1699
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
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
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
Used for passing data between threads.
Definition: dsddec.c:67
AVFrame * out
Definition: af_adeclick.c:502
AVFrame * in
Definition: af_adenorm.c:223
#define src
Definition: vp8dsp.c:255
FILE * out
Definition: movenc.c:54
AVFormatContext * ctx
Definition: movenc.c:48
#define height
#define width
static void hsub(htype *dst, const htype *src, int bins)
Definition: vf_median.c:75
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:99