FFmpeg
avf_abitscope.c
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1 /*
2  * Copyright (c) 2016 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/avstring.h"
22 #include "libavutil/intreadwrite.h"
23 #include "libavutil/opt.h"
24 #include "libavutil/parseutils.h"
25 #include "avfilter.h"
26 #include "filters.h"
27 #include "formats.h"
28 #include "audio.h"
29 #include "video.h"
30 #include "internal.h"
31 
32 typedef struct AudioBitScopeContext {
33  const AVClass *class;
34  int w, h;
36  char *colors;
37  int mode;
38 
41  int depth;
43  uint8_t *fg;
44 
45  uint64_t counter[64];
46 
49 
50 #define OFFSET(x) offsetof(AudioBitScopeContext, x)
51 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
52 
53 static const AVOption abitscope_options[] = {
54  { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
55  { "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
56  { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="1024x256"}, 0, 0, FLAGS },
57  { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="1024x256"}, 0, 0, FLAGS },
58  { "colors", "set channels colors", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "red|green|blue|yellow|orange|lime|pink|magenta|brown" }, 0, 0, FLAGS },
59  { "mode", "set output mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, FLAGS, .unit = "mode" },
60  { "m", "set output mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, FLAGS, .unit = "mode" },
61  { "bars", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, FLAGS, .unit = "mode" },
62  { "trace", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, FLAGS, .unit = "mode" },
63  { NULL }
64 };
65 
66 AVFILTER_DEFINE_CLASS(abitscope);
67 
69 {
72  AVFilterLink *inlink = ctx->inputs[0];
73  AVFilterLink *outlink = ctx->outputs[0];
78  static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };
79  int ret;
80 
82  if ((ret = ff_formats_ref(formats, &inlink->outcfg.formats)) < 0)
83  return ret;
84 
86  if (!layouts)
87  return AVERROR(ENOMEM);
88  if ((ret = ff_channel_layouts_ref(layouts, &inlink->outcfg.channel_layouts)) < 0)
89  return ret;
90 
92  if ((ret = ff_formats_ref(formats, &inlink->outcfg.samplerates)) < 0)
93  return ret;
94 
96  if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0)
97  return ret;
98 
99  return 0;
100 }
101 
103 {
104  AVFilterContext *ctx = inlink->dst;
105  AudioBitScopeContext *s = ctx->priv;
106  int ch;
107  char *colors, *saveptr = NULL;
108 
109  s->nb_samples = FFMAX(1, av_rescale(inlink->sample_rate, s->frame_rate.den, s->frame_rate.num));
110  s->nb_channels = inlink->ch_layout.nb_channels;
111  s->depth = inlink->format == AV_SAMPLE_FMT_S16P ? 16 : 32;
112 
113  s->fg = av_malloc_array(s->nb_channels, 4 * sizeof(*s->fg));
114  if (!s->fg)
115  return AVERROR(ENOMEM);
116 
117  colors = av_strdup(s->colors);
118  if (!colors)
119  return AVERROR(ENOMEM);
120 
121  for (ch = 0; ch < s->nb_channels; ch++) {
122  uint8_t fg[4] = { 0xff, 0xff, 0xff, 0xff };
123  char *color;
124 
125  color = av_strtok(ch == 0 ? colors : NULL, " |", &saveptr);
126  if (color)
127  av_parse_color(fg, color, -1, ctx);
128  s->fg[4 * ch + 0] = fg[0];
129  s->fg[4 * ch + 1] = fg[1];
130  s->fg[4 * ch + 2] = fg[2];
131  s->fg[4 * ch + 3] = fg[3];
132  }
133  av_free(colors);
134 
135  return 0;
136 }
137 
138 static int config_output(AVFilterLink *outlink)
139 {
140  AudioBitScopeContext *s = outlink->src->priv;
141 
142  outlink->w = s->w;
143  outlink->h = s->h;
144  outlink->sample_aspect_ratio = (AVRational){1,1};
145  outlink->frame_rate = s->frame_rate;
146  outlink->time_base = av_inv_q(outlink->frame_rate);
147 
148  return 0;
149 }
150 
151 #define BITCOUNTER(type, depth, one) \
152  memset(counter, 0, sizeof(s->counter)); \
153  for (int i = 0; i < nb_samples; i++) { \
154  const type x = in[i]; \
155  for (int j = 0; j < depth && x; j++) \
156  counter[j] += !!(x & (one << j)); \
157  }
158 
159 #define BARS(type, depth, one) \
160  for (int ch = 0; ch < inlink->ch_layout.nb_channels; ch++) { \
161  const int nb_samples = insamples->nb_samples; \
162  const type *in = (const type *)insamples->extended_data[ch]; \
163  const int w = outpicref->width / inlink->ch_layout.nb_channels; \
164  const int h = outpicref->height / depth; \
165  const uint32_t color = AV_RN32(&s->fg[4 * ch]); \
166  uint64_t *counter = s->counter; \
167  \
168  BITCOUNTER(type, depth, one) \
169  \
170  for (int b = 0; b < depth; b++) { \
171  for (int j = 1; j < h - 1; j++) { \
172  uint8_t *dst = outpicref->data[0] + (b * h + j) * outpicref->linesize[0] + w * ch * 4; \
173  const int ww = (counter[depth - b - 1] / (float)nb_samples) * (w - 1); \
174  \
175  for (int i = 0; i < ww; i++) { \
176  AV_WN32(&dst[i * 4], color); \
177  } \
178  } \
179  } \
180  }
181 
182 #define DO_TRACE(type, depth, one) \
183  for (int ch = 0; ch < inlink->ch_layout.nb_channels; ch++) { \
184  const int nb_samples = insamples->nb_samples; \
185  const int w = outpicref->width / inlink->ch_layout.nb_channels; \
186  const type *in = (const type *)insamples->extended_data[ch]; \
187  uint64_t *counter = s->counter; \
188  const int wb = w / depth; \
189  int wv; \
190  \
191  BITCOUNTER(type, depth, one) \
192  \
193  for (int b = 0; b < depth; b++) { \
194  uint8_t colors[4]; \
195  uint32_t color; \
196  uint8_t *dst = outpicref->data[0] + w * ch * 4 + wb * b * 4 + \
197  s->current_vpos * outpicref->linesize[0]; \
198  wv = (counter[depth - b - 1] * 255) / nb_samples; \
199  colors[0] = (wv * s->fg[ch * 4 + 0] + 127) / 255; \
200  colors[1] = (wv * s->fg[ch * 4 + 1] + 127) / 255; \
201  colors[2] = (wv * s->fg[ch * 4 + 2] + 127) / 255; \
202  colors[3] = (wv * s->fg[ch * 4 + 3] + 127) / 255; \
203  color = AV_RN32(colors); \
204  \
205  for (int x = 0; x < wb; x++) \
206  AV_WN32(&dst[x * 4], color); \
207  } \
208  }
209 
210 static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
211 {
212  AVFilterContext *ctx = inlink->dst;
213  AVFilterLink *outlink = ctx->outputs[0];
214  AudioBitScopeContext *s = ctx->priv;
215  AVFrame *outpicref;
216  int ret;
217 
218  if (s->mode == 0 || !s->outpicref) {
219  outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
220  if (!outpicref) {
221  av_frame_free(&insamples);
222  return AVERROR(ENOMEM);
223  }
224 
225  for (int i = 0; i < outlink->h; i++)
226  memset(outpicref->data[0] + i * outpicref->linesize[0], 0, outlink->w * 4);
227  if (!s->outpicref && s->mode == 1)
228  s->outpicref = outpicref;
229  }
230 
231  if (s->mode == 1) {
232  ret = ff_inlink_make_frame_writable(outlink, &s->outpicref);
233  if (ret < 0) {
234  av_frame_free(&insamples);
235  return ret;
236  }
237  outpicref = av_frame_clone(s->outpicref);
238  if (!outpicref) {
239  av_frame_free(&insamples);
240  return AVERROR(ENOMEM);
241  }
242  }
243 
244  outpicref->pts = av_rescale_q(insamples->pts, inlink->time_base, outlink->time_base);
245  outpicref->duration = 1;
246  outpicref->sample_aspect_ratio = (AVRational){1,1};
247 
248  switch (insamples->format) {
249  case AV_SAMPLE_FMT_U8P:
250  if (s->mode == 0) { BARS(uint8_t, 8, 1) } else { DO_TRACE(uint8_t, 8, 1) }
251  break;
252  case AV_SAMPLE_FMT_S16P:
253  if (s->mode == 0) { BARS(uint16_t, 16, 1) } else { DO_TRACE(uint16_t, 16, 1) }
254  break;
255  case AV_SAMPLE_FMT_FLTP:
256  case AV_SAMPLE_FMT_S32P:
257  if (s->mode == 0) { BARS(uint32_t, 32, 1U) } else { DO_TRACE(uint32_t, 32, 1U) }
258  break;
259  case AV_SAMPLE_FMT_DBLP:
260  case AV_SAMPLE_FMT_S64P:
261  if (s->mode == 0) { BARS(uint64_t, 64, 1ULL) } else { DO_TRACE(uint64_t, 64, 1ULL) }
262  break;
263  }
264 
265  s->current_vpos++;
266  if (s->current_vpos >= outlink->h)
267  s->current_vpos = 0;
268  av_frame_free(&insamples);
269 
270  return ff_filter_frame(outlink, outpicref);
271 }
272 
274 {
275  AVFilterLink *inlink = ctx->inputs[0];
276  AVFilterLink *outlink = ctx->outputs[0];
277  AudioBitScopeContext *s = ctx->priv;
278  AVFrame *in;
279  int ret;
280 
282 
283  ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in);
284  if (ret < 0)
285  return ret;
286  if (ret > 0)
287  return filter_frame(inlink, in);
288 
291 
292  return FFERROR_NOT_READY;
293 }
294 
296 {
297  AudioBitScopeContext *s = ctx->priv;
298 
299  av_frame_free(&s->outpicref);
300 }
301 
302 static const AVFilterPad inputs[] = {
303  {
304  .name = "default",
305  .type = AVMEDIA_TYPE_AUDIO,
306  .config_props = config_input,
307  },
308 };
309 
310 static const AVFilterPad outputs[] = {
311  {
312  .name = "default",
313  .type = AVMEDIA_TYPE_VIDEO,
314  .config_props = config_output,
315  },
316 };
317 
319  .name = "abitscope",
320  .description = NULL_IF_CONFIG_SMALL("Convert input audio to audio bit scope video output."),
321  .priv_size = sizeof(AudioBitScopeContext),
325  .uninit = uninit,
326  .activate = activate,
327  .priv_class = &abitscope_class,
328 };
formats
formats
Definition: signature.h:48
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:112
AV_SAMPLE_FMT_FLTP
@ AV_SAMPLE_FMT_FLTP
float, planar
Definition: samplefmt.h:66
AVFilterChannelLayouts
A list of supported channel layouts.
Definition: formats.h:85
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:71
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:435
color
Definition: vf_paletteuse.c:511
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1007
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:947
AudioBitScopeContext::nb_samples
int nb_samples
Definition: avf_abitscope.c:40
AVFrame::duration
int64_t duration
Duration of the frame, in the same units as pts.
Definition: frame.h:807
ff_channel_layouts_ref
int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
Add *ref as a new reference to f.
Definition: formats.c:673
layouts
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:326
av_parse_color
int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen, void *log_ctx)
Put the RGBA values that correspond to color_string in rgba_color.
Definition: parseutils.c:356
FFERROR_NOT_READY
return FFERROR_NOT_READY
Definition: filter_design.txt:204
AV_OPT_TYPE_VIDEO_RATE
@ AV_OPT_TYPE_VIDEO_RATE
offset must point to AVRational
Definition: opt.h:238
inlink
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
Definition: filter_design.txt:212
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:100
ff_all_channel_counts
AVFilterChannelLayouts * ff_all_channel_counts(void)
Construct an AVFilterChannelLayouts coding for any channel layout, with known or unknown disposition.
Definition: formats.c:621
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:340
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:452
w
uint8_t w
Definition: llviddspenc.c:38
AVOption
AVOption.
Definition: opt.h:251
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:159
AV_SAMPLE_FMT_S32P
@ AV_SAMPLE_FMT_S32P
signed 32 bits, planar
Definition: samplefmt.h:65
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:170
OFFSET
#define OFFSET(x)
Definition: avf_abitscope.c:50
video.h
FF_FILTER_FORWARD_STATUS_BACK
#define FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink)
Forward the status on an output link to an input link.
Definition: filters.h:199
abitscope_options
static const AVOption abitscope_options[]
Definition: avf_abitscope.c:53
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:361
AudioBitScopeContext::frame_rate
AVRational frame_rate
Definition: avf_abitscope.c:35
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
formats.h
FLAGS
#define FLAGS
Definition: avf_abitscope.c:51
AudioBitScopeContext::fg
uint8_t * fg
Definition: avf_abitscope.c:43
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:424
AV_SAMPLE_FMT_S64P
@ AV_SAMPLE_FMT_S64P
signed 64 bits, planar
Definition: samplefmt.h:69
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:33
av_cold
#define av_cold
Definition: attributes.h:90
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:198
AudioBitScopeContext::outpicref
AVFrame * outpicref
Definition: avf_abitscope.c:47
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
ff_formats_ref
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:678
av_strtok
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok().
Definition: avstring.c:178
filters.h
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:304
ctx
AVFormatContext * ctx
Definition: movenc.c:48
av_frame_clone
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:609
av_rescale_q
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
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(abitscope)
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:182
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
Definition: avf_abitscope.c:210
AV_PIX_FMT_RGBA
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:100
ff_inlink_make_frame_writable
int ff_inlink_make_frame_writable(AVFilterLink *link, AVFrame **rframe)
Make sure a frame is writable.
Definition: avfilter.c:1485
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
ff_inlink_consume_samples
int ff_inlink_consume_samples(AVFilterLink *link, unsigned min, unsigned max, AVFrame **rframe)
Take samples from the link's FIFO and update the link's stats.
Definition: avfilter.c:1458
NULL
#define NULL
Definition: coverity.c:32
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AudioBitScopeContext
Definition: avf_abitscope.c:32
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: avf_abitscope.c:295
AV_OPT_TYPE_IMAGE_SIZE
@ AV_OPT_TYPE_IMAGE_SIZE
offset must point to two consecutive integers
Definition: opt.h:235
parseutils.h
AudioBitScopeContext::counter
uint64_t counter[64]
Definition: avf_abitscope.c:45
AudioBitScopeContext::mode
int mode
Definition: avf_abitscope.c:37
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:106
AV_SAMPLE_FMT_U8P
@ AV_SAMPLE_FMT_U8P
unsigned 8 bits, planar
Definition: samplefmt.h:63
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: avf_abitscope.c:68
inputs
static const AVFilterPad inputs[]
Definition: avf_abitscope.c:302
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:56
color
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:94
ff_avf_abitscope
const AVFilter ff_avf_abitscope
Definition: avf_abitscope.c:318
AVFrame::format
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames,...
Definition: frame.h:427
AudioBitScopeContext::w
int w
Definition: avf_abitscope.c:34
FF_FILTER_FORWARD_WANTED
FF_FILTER_FORWARD_WANTED(outlink, inlink)
outputs
static const AVFilterPad outputs[]
Definition: avf_abitscope.c:310
AV_SAMPLE_FMT_S16P
@ AV_SAMPLE_FMT_S16P
signed 16 bits, planar
Definition: samplefmt.h:64
internal.h
AudioBitScopeContext::h
int h
Definition: avf_abitscope.c:34
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:255
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:31
AudioBitScopeContext::depth
int depth
Definition: avf_abitscope.c:41
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:55
av_inv_q
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:39
av_rescale
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
DO_TRACE
#define DO_TRACE(type, depth, one)
Definition: avf_abitscope.c:182
AVFilter
Filter definition.
Definition: avfilter.h:166
ret
ret
Definition: filter_design.txt:187
AudioBitScopeContext::nb_channels
int nb_channels
Definition: avf_abitscope.c:39
AVFrame::sample_aspect_ratio
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:447
U
#define U(x)
Definition: vpx_arith.h:37
config_input
static int config_input(AVFilterLink *inlink)
Definition: avf_abitscope.c:102
ff_all_samplerates
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:606
activate
static int activate(AVFilterContext *ctx)
Definition: avf_abitscope.c:273
mode
mode
Definition: ebur128.h:83
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:72
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
avfilter.h
AV_SAMPLE_FMT_DBLP
@ AV_SAMPLE_FMT_DBLP
double, planar
Definition: samplefmt.h:67
AVFilterContext
An instance of a filter.
Definition: avfilter.h:409
av_strdup
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:270
AudioBitScopeContext::current_vpos
int current_vpos
Definition: avf_abitscope.c:42
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
config_output
static int config_output(AVFilterLink *outlink)
Definition: avf_abitscope.c:138
audio.h
AVFilterFormatsConfig::formats
AVFilterFormats * formats
List of supported formats (pixel or sample).
Definition: avfilter.h:517
av_free
#define av_free(p)
Definition: tableprint_vlc.h:33
FF_FILTER_FORWARD_STATUS
FF_FILTER_FORWARD_STATUS(inlink, outlink)
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:183
AudioBitScopeContext::colors
char * colors
Definition: avf_abitscope.c:36
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
Definition: frame.h:385
avstring.h
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
BARS
#define BARS(type, depth, one)
Definition: avf_abitscope.c:159
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:234