FFmpeg: libavfilter/vf_histogram.c Source File

FFmpeg
vf_histogram.c
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1 /*
2  * Copyright (c) 2012-2013 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/avassert.h"
22 #include "libavutil/opt.h"
23 #include "libavutil/parseutils.h"
24 #include "libavutil/pixdesc.h"
25 #include "avfilter.h"
26 #include "formats.h"
27 #include "internal.h"
28 #include "video.h"
29 
30  enum HistogramMode {
31   MODE_LEVELS,
32   MODE_WAVEFORM,
33   MODE_COLOR,
34   MODE_COLOR2,
35   MODE_NB
36 };
37 
38  typedef struct HistogramContext {
39   const AVClass *class; ///< AVClass context for log and options purpose
40   int mode; ///< HistogramMode
41   unsigned histogram[256];
42   int ncomp;
43   const uint8_t *bg_color;
44   const uint8_t *fg_color;
45   int level_height;
46   int scale_height;
47   int step;
48   int waveform_mode;
49   int waveform_mirror;
50   int display_mode;
51   int levels_mode;
52   const AVPixFmtDescriptor *desc;
53 } HistogramContext;
54 
55  #define OFFSET(x) offsetof(HistogramContext, x)
56  #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
57 
58  static const AVOption histogram_options[] = {
59  { "mode", "set histogram mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_LEVELS}, 0, MODE_NB-1, FLAGS, "mode"},
60  { "levels", "standard histogram", 0, AV_OPT_TYPE_CONST, {.i64=MODE_LEVELS}, 0, 0, FLAGS, "mode" },
61  { "waveform", "per row/column luminance graph", 0, AV_OPT_TYPE_CONST, {.i64=MODE_WAVEFORM}, 0, 0, FLAGS, "mode" },
62  { "color", "chroma values in vectorscope", 0, AV_OPT_TYPE_CONST, {.i64=MODE_COLOR}, 0, 0, FLAGS, "mode" },
63  { "color2", "chroma values in vectorscope", 0, AV_OPT_TYPE_CONST, {.i64=MODE_COLOR2}, 0, 0, FLAGS, "mode" },
64  { "level_height", "set level height", OFFSET(level_height), AV_OPT_TYPE_INT, {.i64=200}, 50, 2048, FLAGS},
65  { "scale_height", "set scale height", OFFSET(scale_height), AV_OPT_TYPE_INT, {.i64=12}, 0, 40, FLAGS},
66  { "step", "set waveform step value", OFFSET(step), AV_OPT_TYPE_INT, {.i64=10}, 1, 255, FLAGS},
67  { "waveform_mode", "set waveform mode", OFFSET(waveform_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "waveform_mode"},
68  { "row", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "waveform_mode" },
69  { "column", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "waveform_mode" },
70  { "waveform_mirror", "set waveform mirroring", OFFSET(waveform_mirror), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "waveform_mirror"},
71  { "display_mode", "set display mode", OFFSET(display_mode), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS, "display_mode"},
72  { "parade", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "display_mode" },
73  { "overlay", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "display_mode" },
74  { "levels_mode", "set levels mode", OFFSET(levels_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "levels_mode"},
75  { "linear", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "levels_mode" },
76  { "logarithmic", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "levels_mode" },
77  { NULL }
78 };
79 
80 AVFILTER_DEFINE_CLASS(histogram);
81 
82  static const enum AVPixelFormat color_pix_fmts[] = {
83  AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVJ444P,
84  AV_PIX_FMT_NONE
85 };
86 
87  static const enum AVPixelFormat levels_pix_fmts[] = {
88  AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVJ444P,
89  AV_PIX_FMT_GRAY8, AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_NONE
90 };
91 
92  static const enum AVPixelFormat waveform_pix_fmts[] = {
93  AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
94  AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
95  AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
96  AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
97  AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P,
98  AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
99  AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
100  AV_PIX_FMT_GRAY8,
101  AV_PIX_FMT_NONE
102 };
103 
104  static int query_formats(AVFilterContext *ctx)
105 {
106  HistogramContext *h = ctx->priv;
107  const enum AVPixelFormat *pix_fmts;
108  AVFilterFormats *fmts_list;
109 
110  switch (h->mode) {
111  case MODE_WAVEFORM:
112  pix_fmts = waveform_pix_fmts;
113  break;
114  case MODE_LEVELS:
115  pix_fmts = levels_pix_fmts;
116  break;
117  case MODE_COLOR:
118  case MODE_COLOR2:
119  pix_fmts = color_pix_fmts;
120  break;
121  default:
122  av_assert0(0);
123  }
124 
125  fmts_list = ff_make_format_list(pix_fmts);
126  if (!fmts_list)
127  return AVERROR(ENOMEM);
128  return ff_set_common_formats(ctx, fmts_list);
129 }
130 
131  static const uint8_t black_yuva_color[4] = { 0, 127, 127, 255 };
132  static const uint8_t black_gbrp_color[4] = { 0, 0, 0, 255 };
133  static const uint8_t white_yuva_color[4] = { 255, 127, 127, 255 };
134  static const uint8_t white_gbrp_color[4] = { 255, 255, 255, 255 };
135 
136  static int config_input(AVFilterLink *inlink)
137 {
138  HistogramContext *h = inlink->dst->priv;
139 
140  h->desc = av_pix_fmt_desc_get(inlink->format);
141  h->ncomp = h->desc->nb_components;
142 
143  switch (inlink->format) {
144  case AV_PIX_FMT_GBRAP:
145  case AV_PIX_FMT_GBRP:
146  h->bg_color = black_gbrp_color;
147  h->fg_color = white_gbrp_color;
148  break;
149  default:
150  h->bg_color = black_yuva_color;
151  h->fg_color = white_yuva_color;
152  }
153 
154  return 0;
155 }
156 
157  static int config_output(AVFilterLink *outlink)
158 {
159  AVFilterContext *ctx = outlink->src;
160  HistogramContext *h = ctx->priv;
161 
162  switch (h->mode) {
163  case MODE_LEVELS:
164  outlink->w = 256;
165  outlink->h = (h->level_height + h->scale_height) * FFMAX(h->ncomp * h->display_mode, 1);
166  break;
167  case MODE_WAVEFORM:
168  if (h->waveform_mode)
169  outlink->h = 256 * FFMAX(h->ncomp * h->display_mode, 1);
170  else
171  outlink->w = 256 * FFMAX(h->ncomp * h->display_mode, 1);
172  break;
173  case MODE_COLOR:
174  case MODE_COLOR2:
175  outlink->h = outlink->w = 256;
176  break;
177  default:
178  av_assert0(0);
179  }
180 
181  outlink->sample_aspect_ratio = (AVRational){1,1};
182 
183  return 0;
184 }
185 
186  static void gen_waveform(HistogramContext *h, AVFrame *inpicref, AVFrame *outpicref,
187  int component, int intensity, int offset, int col_mode)
188 {
189  const int plane = h->desc->comp[component].plane;
190  const int mirror = h->waveform_mirror;
191  const int is_chroma = (component == 1 || component == 2);
192  const int shift_w = (is_chroma ? h->desc->log2_chroma_w : 0);
193  const int shift_h = (is_chroma ? h->desc->log2_chroma_h : 0);
194  const int src_linesize = inpicref->linesize[plane];
195  const int dst_linesize = outpicref->linesize[plane];
196  const int dst_signed_linesize = dst_linesize * (mirror == 1 ? -1 : 1);
197  uint8_t *src_data = inpicref->data[plane];
198  uint8_t *dst_data = outpicref->data[plane] + (col_mode ? (offset >> shift_h) * dst_linesize : offset >> shift_w);
199  uint8_t * const dst_bottom_line = dst_data + dst_linesize * ((256 >> shift_h) - 1);
200  uint8_t * const dst_line = (mirror ? dst_bottom_line : dst_data);
201  const uint8_t max = 255 - intensity;
202  const int src_h = FF_CEIL_RSHIFT(inpicref->height, shift_h);
203  const int src_w = FF_CEIL_RSHIFT(inpicref->width, shift_w);
204  uint8_t *dst, *p;
205  int y;
206 
207  if (!col_mode && mirror)
208  dst_data += 256 >> shift_w;
209  for (y = 0; y < src_h; y++) {
210  const uint8_t *src_data_end = src_data + src_w;
211  dst = dst_line;
212  for (p = src_data; p < src_data_end; p++) {
213  uint8_t *target;
214  if (col_mode) {
215  target = dst++ + dst_signed_linesize * (*p >> shift_h);
216  } else {
217  if (mirror)
218  target = dst_data - (*p >> shift_w);
219  else
220  target = dst_data + (*p >> shift_w);
221  }
222  if (*target <= max)
223  *target += intensity;
224  else
225  *target = 255;
226  }
227  src_data += src_linesize;
228  dst_data += dst_linesize;
229  }
230 }
231 
232 
233  static int filter_frame(AVFilterLink *inlink, AVFrame *in)
234 {
235  HistogramContext *h = inlink->dst->priv;
236  AVFilterContext *ctx = inlink->dst;
237  AVFilterLink *outlink = ctx->outputs[0];
238  AVFrame *out;
239  const uint8_t *src;
240  uint8_t *dst;
241  int i, j, k, l;
242 
243  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
244  if (!out) {
245  av_frame_free(&in);
246  return AVERROR(ENOMEM);
247  }
248 
249  out->pts = in->pts;
250 
251  for (k = 0; k < h->ncomp; k++) {
252  const int is_chroma = (k == 1 || k == 2);
253  const int dst_h = FF_CEIL_RSHIFT(outlink->h, (is_chroma ? h->desc->log2_chroma_h : 0));
254  const int dst_w = FF_CEIL_RSHIFT(outlink->w, (is_chroma ? h->desc->log2_chroma_w : 0));
255  for (i = 0; i < dst_h ; i++)
256  memset(out->data[h->desc->comp[k].plane] +
257  i * out->linesize[h->desc->comp[k].plane],
258  h->bg_color[k], dst_w);
259  }
260 
261  switch (h->mode) {
262  case MODE_LEVELS:
263  for (k = 0; k < h->ncomp; k++) {
264  const int p = h->desc->comp[k].plane;
265  const int start = k * (h->level_height + h->scale_height) * h->display_mode;
266  double max_hval_log;
267  unsigned max_hval = 0;
268 
269  for (i = 0; i < in->height; i++) {
270  src = in->data[p] + i * in->linesize[p];
271  for (j = 0; j < in->width; j++)
272  h->histogram[src[j]]++;
273  }
274 
275  for (i = 0; i < 256; i++)
276  max_hval = FFMAX(max_hval, h->histogram[i]);
277  max_hval_log = log2(max_hval + 1);
278 
279  for (i = 0; i < outlink->w; i++) {
280  int col_height;
281 
282  if (h->levels_mode)
283  col_height = round(h->level_height * (1. - (log2(h->histogram[i] + 1) / max_hval_log)));
284  else
285  col_height = h->level_height - (h->histogram[i] * (int64_t)h->level_height + max_hval - 1) / max_hval;
286 
287  for (j = h->level_height - 1; j >= col_height; j--) {
288  if (h->display_mode) {
289  for (l = 0; l < h->ncomp; l++)
290  out->data[l][(j + start) * out->linesize[l] + i] = h->fg_color[l];
291  } else {
292  out->data[p][(j + start) * out->linesize[p] + i] = 255;
293  }
294  }
295  for (j = h->level_height + h->scale_height - 1; j >= h->level_height; j--)
296  out->data[p][(j + start) * out->linesize[p] + i] = i;
297  }
298 
299  memset(h->histogram, 0, 256 * sizeof(unsigned));
300  }
301  break;
302  case MODE_WAVEFORM:
303  for (k = 0; k < h->ncomp; k++) {
304  const int offset = k * 256 * h->display_mode;
305  gen_waveform(h, in, out, k, h->step, offset, h->waveform_mode);
306  }
307  break;
308  case MODE_COLOR:
309  for (i = 0; i < inlink->h; i++) {
310  const int iw1 = i * in->linesize[1];
311  const int iw2 = i * in->linesize[2];
312  for (j = 0; j < inlink->w; j++) {
313  const int pos = in->data[1][iw1 + j] * out->linesize[0] + in->data[2][iw2 + j];
314  if (out->data[0][pos] < 255)
315  out->data[0][pos]++;
316  }
317  }
318  for (i = 0; i < 256; i++) {
319  dst = out->data[0] + i * out->linesize[0];
320  for (j = 0; j < 256; j++) {
321  if (!dst[j]) {
322  out->data[1][i * out->linesize[0] + j] = i;
323  out->data[2][i * out->linesize[0] + j] = j;
324  }
325  }
326  }
327  break;
328  case MODE_COLOR2:
329  for (i = 0; i < inlink->h; i++) {
330  const int iw1 = i * in->linesize[1];
331  const int iw2 = i * in->linesize[2];
332  for (j = 0; j < inlink->w; j++) {
333  const int u = in->data[1][iw1 + j];
334  const int v = in->data[2][iw2 + j];
335  const int pos = u * out->linesize[0] + v;
336  if (!out->data[0][pos])
337  out->data[0][pos] = FFABS(128 - u) + FFABS(128 - v);
338  out->data[1][pos] = u;
339  out->data[2][pos] = v;
340  }
341  }
342  break;
343  default:
344  av_assert0(0);
345  }
346 
347  av_frame_free(&in);
348  return ff_filter_frame(outlink, out);
349 }
350 
351  static const AVFilterPad inputs[] = {
352  {
353  .name = "default",
354  .type = AVMEDIA_TYPE_VIDEO,
355  .filter_frame = filter_frame,
356  .config_props = config_input,
357  },
358  { NULL }
359 };
360 
361  static const AVFilterPad outputs[] = {
362  {
363  .name = "default",
364  .type = AVMEDIA_TYPE_VIDEO,
365  .config_props = config_output,
366  },
367  { NULL }
368 };
369 
370  AVFilter ff_vf_histogram = {
371  .name = "histogram",
372  .description = NULL_IF_CONFIG_SMALL("Compute and draw a histogram."),
373  .priv_size = sizeof(HistogramContext),
374  .query_formats = query_formats,
375  .inputs = inputs,
376  .outputs = outputs,
377  .priv_class = &histogram_class,
378 };
MODE_WAVEFORM
Definition: vf_histogram.c:32
plane
int plane
Definition: avisynth_c.h:291
NULL
#define NULL
Definition: coverity.c:32
HistogramMode
HistogramMode
Definition: vf_histogram.c:30
v
float v
Definition: avf_showspectrum.c:96
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2090
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
h
h
Definition: vp9dsp_template.c:2093
AVOption
AVOption.
Definition: opt.h:255
AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:68
avfilter.h
Main libavfilter public API header.
AV_OPT_TYPE_INT
Definition: opt.h:223
AV_PIX_FMT_GBRP
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:176
waveform_pix_fmts
static enum AVPixelFormat waveform_pix_fmts[]
Definition: vf_histogram.c:92
ff_get_video_buffer
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:109
AVPixFmtDescriptor::log2_chroma_w
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:80
log2
#define log2(x)
Definition: libm.h:122
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:67
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
black_gbrp_color
static const uint8_t black_gbrp_color[4]
Definition: vf_histogram.c:132
AV_OPT_TYPE_CONST
Definition: opt.h:231
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1145
AV_PIX_FMT_YUVA420P
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:103
AVPixFmtDescriptor::comp
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:100
uint8_t
uint8_t
Definition: audio_convert.c:194
mode
mode
Definition: f_perms.c:27
opt.h
AVOptions.
HistogramContext::bg_color
const uint8_t * bg_color
Definition: vf_histogram.c:43
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:257
AV_PIX_FMT_YUVJ440P
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range...
Definition: pixfmt.h:102
inputs
static const AVFilterPad inputs[]
Definition: vf_histogram.c:351
AV_PIX_FMT_YUVJ422P
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:76
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_histogram.c:136
gen_waveform
static void gen_waveform(HistogramContext *h, AVFrame *inpicref, AVFrame *outpicref, int component, int intensity, int offset, int col_mode)
Definition: vf_histogram.c:186
outputs
static const AVFilterPad outputs[]
Definition: vf_histogram.c:361
color_pix_fmts
static enum AVPixelFormat color_pix_fmts[]
Definition: vf_histogram.c:82
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:61
white_gbrp_color
static const uint8_t white_gbrp_color[4]
Definition: vf_histogram.c:134
AV_PIX_FMT_YUVA422P
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:269
AVFrame::width
int width
width and height of the video frame
Definition: frame.h:220
ff_set_common_formats
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:542
AVPixFmtDescriptor::log2_chroma_h
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:89
AVERROR
#define AVERROR(e)
Definition: error.h:43
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:148
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:654
avassert.h
simple assert() macros that are a bit more flexible than ISO C assert().
round
static av_always_inline av_const double round(double x)
Definition: libm.h:162
OFFSET
#define OFFSET(x)
Definition: vf_histogram.c:55
offset
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
FFMAX
#define FFMAX(a, b)
Definition: common.h:64
ff_vf_histogram
AVFilter ff_vf_histogram
Definition: vf_histogram.c:370
AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:67
HistogramContext::histogram
unsigned histogram[256]
Definition: vf_histogram.c:41
AVPixFmtDescriptor::nb_components
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:71
MODE_COLOR2
Definition: vf_histogram.c:34
y
float y
Definition: avf_showspectrum.c:96
AV_PIX_FMT_YUVJ420P
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:75
FF_CEIL_RSHIFT
#define FF_CEIL_RSHIFT(a, b)
Definition: common.h:57
HistogramContext::fg_color
const uint8_t * fg_color
Definition: vf_histogram.c:44
FFABS
#define FFABS(a)
Definition: common.h:61
u
float u
Definition: avf_showspectrum.c:96
levels_pix_fmts
static enum AVPixelFormat levels_pix_fmts[]
Definition: vf_histogram.c:87
histogram_options
static const AVOption histogram_options[]
Definition: vf_histogram.c:58
src
AVS_Value src
Definition: avisynth_c.h:482
MODE_NB
Definition: vf_histogram.c:35
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
AV_PIX_FMT_YUVA444P
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:268
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
HistogramContext::desc
const AVPixFmtDescriptor * desc
Definition: vf_histogram.c:52
in
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
Definition: audio_convert.c:194
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_histogram.c:157
AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:69
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
AVFilter
Filter definition.
Definition: avfilter.h:470
AVRational
rational number numerator/denominator
Definition: rational.h:43
white_yuva_color
static const uint8_t white_yuva_color[4]
Definition: vf_histogram.c:133
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:474
parseutils.h
misc parsing utilities
AVFilterContext::outputs
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:648
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
AVComponentDescriptor::plane
uint16_t plane
Which of the 4 planes contains the component.
Definition: pixdesc.h:34
AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63
AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:71
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(histogram)
AV_PIX_FMT_GBRAP
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:287
AV_PIX_FMT_YUVJ444P
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:77
AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:70
FLAGS
#define FLAGS
Definition: vf_histogram.c:56
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_histogram.c:104
black_yuva_color
static const uint8_t black_yuva_color[4]
Definition: vf_histogram.c:131
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_histogram.c:233
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
AV_PIX_FMT_YUVJ411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
Definition: pixfmt.h:290
out
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-> out
Definition: audio_convert.c:194
AVFilterContext
An instance of a filter.
Definition: avfilter.h:633
AVFrame::height
int height
Definition: frame.h:220
AV_PIX_FMT_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:101
MODE_COLOR
Definition: vf_histogram.c:33
start
void INT64 start
Definition: avisynth_c.h:553
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:194
internal.h
internal API functions
MODE_LEVELS
Definition: vf_histogram.c:31
HistogramContext::mode
int mode
HistogramMode.
Definition: vf_histogram.c:40
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469
Generated on Wed Jun 10 2015 01:56:55 for FFmpeg by   doxygen 1.8.6

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