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avf_avectorscope.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 /**
22  * @file
23  * audio to video multimedia vectorscope filter
24  */
25 
26 #include "libavutil/avassert.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/parseutils.h"
30 #include "avfilter.h"
31 #include "formats.h"
32 #include "audio.h"
33 #include "video.h"
34 #include "internal.h"
35 
41 };
42 
44  DOT,
47 };
48 
49 typedef struct AudioVectorScopeContext {
50  const AVClass *class;
52  int w, h;
53  int hw, hh;
54  int mode;
55  int draw;
56  int contrast[4];
57  int fade[4];
58  double zoom;
59  unsigned prev_x, prev_y;
62 
63 #define OFFSET(x) offsetof(AudioVectorScopeContext, x)
64 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
65 
66 static const AVOption avectorscope_options[] = {
67  { "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, FLAGS, "mode" },
68  { "m", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, FLAGS, "mode" },
69  { "lissajous", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS}, 0, 0, FLAGS, "mode" },
70  { "lissajous_xy", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS_XY}, 0, 0, FLAGS, "mode" },
71  { "polar", "", 0, AV_OPT_TYPE_CONST, {.i64=POLAR}, 0, 0, FLAGS, "mode" },
72  { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
73  { "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
74  { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="400x400"}, 0, 0, FLAGS },
75  { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="400x400"}, 0, 0, FLAGS },
76  { "rc", "set red contrast", OFFSET(contrast[0]), AV_OPT_TYPE_INT, {.i64=40}, 0, 255, FLAGS },
77  { "gc", "set green contrast", OFFSET(contrast[1]), AV_OPT_TYPE_INT, {.i64=160}, 0, 255, FLAGS },
78  { "bc", "set blue contrast", OFFSET(contrast[2]), AV_OPT_TYPE_INT, {.i64=80}, 0, 255, FLAGS },
79  { "ac", "set alpha contrast", OFFSET(contrast[3]), AV_OPT_TYPE_INT, {.i64=255}, 0, 255, FLAGS },
80  { "rf", "set red fade", OFFSET(fade[0]), AV_OPT_TYPE_INT, {.i64=15}, 0, 255, FLAGS },
81  { "gf", "set green fade", OFFSET(fade[1]), AV_OPT_TYPE_INT, {.i64=10}, 0, 255, FLAGS },
82  { "bf", "set blue fade", OFFSET(fade[2]), AV_OPT_TYPE_INT, {.i64=5}, 0, 255, FLAGS },
83  { "af", "set alpha fade", OFFSET(fade[3]), AV_OPT_TYPE_INT, {.i64=5}, 0, 255, FLAGS },
84  { "zoom", "set zoom factor", OFFSET(zoom), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 1, 10, FLAGS },
85  { "draw", "set draw mode", OFFSET(draw), AV_OPT_TYPE_INT, {.i64=DOT}, 0, DRAW_NB-1, FLAGS, "draw" },
86  { "dot", "", 0, AV_OPT_TYPE_CONST, {.i64=DOT} , 0, 0, FLAGS, "draw" },
87  { "line", "", 0, AV_OPT_TYPE_CONST, {.i64=LINE}, 0, 0, FLAGS, "draw" },
88  { NULL }
89 };
90 
91 AVFILTER_DEFINE_CLASS(avectorscope);
92 
93 static void draw_dot(AudioVectorScopeContext *s, unsigned x, unsigned y)
94 {
95  const int linesize = s->outpicref->linesize[0];
96  uint8_t *dst;
97 
98  if (s->zoom > 1) {
99  if (y >= s->h || x >= s->w)
100  return;
101  } else {
102  y = FFMIN(y, s->h - 1);
103  x = FFMIN(x, s->w - 1);
104  }
105 
106  dst = &s->outpicref->data[0][y * linesize + x * 4];
107  dst[0] = FFMIN(dst[0] + s->contrast[0], 255);
108  dst[1] = FFMIN(dst[1] + s->contrast[1], 255);
109  dst[2] = FFMIN(dst[2] + s->contrast[2], 255);
110  dst[3] = FFMIN(dst[3] + s->contrast[3], 255);
111 }
112 
113 static void draw_line(AudioVectorScopeContext *s, int x0, int y0, int x1, int y1)
114 {
115  int dx = FFABS(x1-x0), sx = x0 < x1 ? 1 : -1;
116  int dy = FFABS(y1-y0), sy = y0 < y1 ? 1 : -1;
117  int err = (dx>dy ? dx : -dy) / 2, e2;
118 
119  for (;;) {
120  draw_dot(s, x0, y0);
121 
122  if (x0 == x1 && y0 == y1)
123  break;
124 
125  e2 = err;
126 
127  if (e2 >-dx) {
128  err -= dy;
129  x0 += sx;
130  }
131 
132  if (e2 < dy) {
133  err += dx;
134  y0 += sy;
135  }
136  }
137 }
138 
140 {
141  const int linesize = s->outpicref->linesize[0];
142  int i, j;
143 
144  if (s->fade[0] || s->fade[1] || s->fade[2]) {
145  uint8_t *d = s->outpicref->data[0];
146  for (i = 0; i < s->h; i++) {
147  for (j = 0; j < s->w*4; j+=4) {
148  d[j+0] = FFMAX(d[j+0] - s->fade[0], 0);
149  d[j+1] = FFMAX(d[j+1] - s->fade[1], 0);
150  d[j+2] = FFMAX(d[j+2] - s->fade[2], 0);
151  d[j+3] = FFMAX(d[j+3] - s->fade[3], 0);
152  }
153  d += linesize;
154  }
155  }
156 }
157 
159 {
162  AVFilterLink *inlink = ctx->inputs[0];
163  AVFilterLink *outlink = ctx->outputs[0];
165  static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };
166  int ret;
167 
168  formats = ff_make_format_list(sample_fmts);
169  if ((ret = ff_formats_ref (formats, &inlink->out_formats )) < 0 ||
170  (ret = ff_add_channel_layout (&layout, AV_CH_LAYOUT_STEREO )) < 0 ||
171  (ret = ff_channel_layouts_ref (layout , &inlink->out_channel_layouts)) < 0)
172  return ret;
173 
174  formats = ff_all_samplerates();
175  if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0)
176  return ret;
177 
178  formats = ff_make_format_list(pix_fmts);
179  if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)
180  return ret;
181 
182  return 0;
183 }
184 
185 static int config_input(AVFilterLink *inlink)
186 {
187  AVFilterContext *ctx = inlink->dst;
189  int nb_samples;
190 
191  nb_samples = FFMAX(1024, ((double)inlink->sample_rate / av_q2d(s->frame_rate)) + 0.5);
192  inlink->partial_buf_size =
193  inlink->min_samples =
194  inlink->max_samples = nb_samples;
195 
196  return 0;
197 }
198 
199 static int config_output(AVFilterLink *outlink)
200 {
201  AudioVectorScopeContext *s = outlink->src->priv;
202 
203  outlink->w = s->w;
204  outlink->h = s->h;
205  outlink->sample_aspect_ratio = (AVRational){1,1};
206  outlink->frame_rate = s->frame_rate;
207 
208  s->prev_x = s->hw = s->w / 2;
209  s->prev_y = s->hh = s->h / 2;
210 
211  return 0;
212 }
213 
214 static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
215 {
216  AVFilterContext *ctx = inlink->dst;
217  AVFilterLink *outlink = ctx->outputs[0];
219  const int hw = s->hw;
220  const int hh = s->hh;
221  unsigned x, y;
222  unsigned prev_x = s->prev_x, prev_y = s->prev_y;
223  const double zoom = s->zoom;
224  int i;
225 
226  if (!s->outpicref || s->outpicref->width != outlink->w ||
227  s->outpicref->height != outlink->h) {
229  s->outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
230  if (!s->outpicref) {
231  av_frame_free(&insamples);
232  return AVERROR(ENOMEM);
233  }
234 
235  for (i = 0; i < outlink->h; i++)
236  memset(s->outpicref->data[0] + i * s->outpicref->linesize[0], 0, outlink->w * 4);
237  }
238  s->outpicref->pts = insamples->pts;
239 
240  fade(s);
241 
242  switch (insamples->format) {
243  case AV_SAMPLE_FMT_S16:
244  for (i = 0; i < insamples->nb_samples; i++) {
245  int16_t *src = (int16_t *)insamples->data[0] + i * 2;
246 
247  if (s->mode == LISSAJOUS) {
248  x = ((src[1] - src[0]) * zoom / (float)(UINT16_MAX) + 1) * hw;
249  y = (1.0 - (src[0] + src[1]) * zoom / (float)UINT16_MAX) * hh;
250  } else if (s->mode == LISSAJOUS_XY) {
251  x = (src[1] * zoom / (float)INT16_MAX + 1) * hw;
252  y = (src[0] * zoom / (float)INT16_MAX + 1) * hh;
253  } else {
254  float sx, sy, cx, cy;
255 
256  sx = src[1] * zoom / (float)INT16_MAX;
257  sy = src[0] * zoom / (float)INT16_MAX;
258  cx = sx * sqrtf(1 - 0.5*sy*sy);
259  cy = sy * sqrtf(1 - 0.5*sx*sx);
260  x = hw + hw * FFSIGN(cx + cy) * (cx - cy) * .7;
261  y = s->h - s->h * fabsf(cx + cy) * .7;
262  }
263 
264  if (s->draw == DOT) {
265  draw_dot(s, x, y);
266  } else {
267  draw_line(s, x, y, prev_x, prev_y);
268  }
269  prev_x = x;
270  prev_y = y;
271  }
272  break;
273  case AV_SAMPLE_FMT_FLT:
274  for (i = 0; i < insamples->nb_samples; i++) {
275  float *src = (float *)insamples->data[0] + i * 2;
276 
277  if (s->mode == LISSAJOUS) {
278  x = ((src[1] - src[0]) * zoom / 2 + 1) * hw;
279  y = (1.0 - (src[0] + src[1]) * zoom / 2) * hh;
280  } else if (s->mode == LISSAJOUS_XY){
281  x = (src[1] * zoom + 1) * hw;
282  y = (src[0] * zoom + 1) * hh;
283  } else {
284  float sx, sy, cx, cy;
285 
286  sx = src[1] * zoom;
287  sy = src[0] * zoom;
288  cx = sx * sqrtf(1 - 0.5 * sy * sy);
289  cy = sy * sqrtf(1 - 0.5 * sx * sx);
290  x = hw + hw * FFSIGN(cx + cy) * (cx - cy) * .7;
291  y = s->h - s->h * fabsf(cx + cy) * .7;
292  }
293 
294  if (s->draw == DOT) {
295  draw_dot(s, x, y);
296  } else {
297  draw_line(s, x, y, prev_x, prev_y);
298  }
299  prev_x = x;
300  prev_y = y;
301  }
302  break;
303  default:
304  av_assert0(0);
305  }
306 
307  s->prev_x = x, s->prev_y = y;
308  av_frame_free(&insamples);
309 
310  return ff_filter_frame(outlink, av_frame_clone(s->outpicref));
311 }
312 
314 {
316 
318 }
319 
321  {
322  .name = "default",
323  .type = AVMEDIA_TYPE_AUDIO,
324  .config_props = config_input,
325  .filter_frame = filter_frame,
326  },
327  { NULL }
328 };
329 
331  {
332  .name = "default",
333  .type = AVMEDIA_TYPE_VIDEO,
334  .config_props = config_output,
335  },
336  { NULL }
337 };
338 
340  .name = "avectorscope",
341  .description = NULL_IF_CONFIG_SMALL("Convert input audio to vectorscope video output."),
342  .uninit = uninit,
343  .query_formats = query_formats,
344  .priv_size = sizeof(AudioVectorScopeContext),
345  .inputs = audiovectorscope_inputs,
346  .outputs = audiovectorscope_outputs,
347  .priv_class = &avectorscope_class,
348 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
AVOption.
Definition: opt.h:245
Main libavfilter public API header.
static void draw_line(AudioVectorScopeContext *s, int x0, int y0, int x1, int y1)
static av_cold void uninit(AVFilterContext *ctx)
static enum AVSampleFormat formats[]
Definition: avresample.c:163
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:76
#define AV_CH_LAYOUT_STEREO
AVFilter ff_avf_avectorscope
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:59
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:313
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
Add *ref as a new reference to f.
Definition: formats.c:435
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1180
uint8_t
#define av_cold
Definition: attributes.h:82
mode
Definition: f_perms.c:27
AVOptions.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:268
static const AVFilterPad audiovectorscope_outputs[]
static double av_q2d(AVRational a)
Convert rational to double.
Definition: rational.h:80
A filter pad used for either input or output.
Definition: internal.h:53
#define FLAGS
int width
width and height of the video frame
Definition: frame.h:236
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
Definition: formats.c:343
#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:153
static int config_input(AVFilterLink *inlink)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
void * priv
private data for use by the filter
Definition: avfilter.h:320
simple assert() macros that are a bit more flexible than ISO C assert().
static const AVOption avectorscope_options[]
#define FFMAX(a, b)
Definition: common.h:94
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:94
VectorScopeMode
audio channel layout utility functions
#define FFMIN(a, b)
Definition: common.h:96
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:440
#define FFSIGN(a)
Definition: common.h:73
AVFormatContext * ctx
Definition: movenc.c:48
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
static const AVFilterPad audiovectorscope_inputs[]
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:386
#define src
Definition: vp9dsp.c:530
static void draw_dot(AudioVectorScopeContext *s, unsigned x, unsigned y)
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:471
AVFILTER_DEFINE_CLASS(avectorscope)
static int config_output(AVFilterLink *outlink)
A list of supported channel layouts.
Definition: formats.h:85
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:248
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:376
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:215
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:142
rational number numerator/denominator
Definition: rational.h:43
offset must point to AVRational
Definition: opt.h:235
const char * name
Filter name.
Definition: avfilter.h:146
offset must point to two consecutive integers
Definition: opt.h:232
misc parsing utilities
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:317
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:262
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:395
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:198
static int query_formats(AVFilterContext *ctx)
if(ret< 0)
Definition: vf_mcdeint.c:282
static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
signed 16 bits
Definition: samplefmt.h:61
A list of supported formats for one end of a filter link.
Definition: formats.h:64
uint64_t layout
VectorScopeDraw
An instance of a filter.
Definition: avfilter.h:305
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
int height
Definition: frame.h:236
internal API functions
static void fade(AudioVectorScopeContext *s)
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:241
#define OFFSET(x)