72 #define OFFSET(x) offsetof(ShowFreqsContext, x) 73 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM 115 {
"colors",
"set channels colors",
OFFSET(
colors),
AV_OPT_TYPE_STRING, {.str =
"red|green|blue|yellow|orange|lime|pink|magenta|brown" }, 0, 0, FLAGS },
185 "The window size might be too high.\n");
247 if ((color & 0xffffff) != 0)
261 return pow(s->
w, f/(s->
nb_freq-1.));
276 return pow(s->
w, (f+1)/(s->
nb_freq-1.))-
284 double a,
int f,
uint8_t fg[4],
int *prev_y,
291 const int sx =
get_sx(s, f);
292 int end = outlink->
h;
303 a = log(
av_clipd(a, min, 1)) / log(min);
312 y = a * outlink->
h - 1;
342 for (x = sx + 1; x < sx + bsize && x <
w; x++)
344 for (i = y; i <= *prev_y; i++)
347 for (i = *prev_y; i <= y; i++)
349 for (x = sx + 1; x < sx + bsize && x <
w; x++)
355 for (x = sx; x < sx + bsize && x <
w; x++)
356 for (i = y; i < end; i++)
360 for (x = sx; x < sx + bsize && x <
w; x++)
380 for (n = 0; n < outlink->
h; n++)
381 memset(out->
data[0] + out->
linesize[0] * n, 0, outlink->
w * 4);
403 #define RE(x, ch) s->fft_data[ch][x].re 404 #define IM(x, ch) s->fft_data[ch][x].im 405 #define M(a, b) (sqrt((a) * (a) + (b) * (b))) 406 #define P(a, b) (atan2((b), (a))) 415 uint8_t fg[4] = { 0xff, 0xff, 0xff, 0xff };
426 plot_freq(s, ch, a, 0, fg, &prev_y, out, outlink);
431 plot_freq(s, ch, a,
f, fg, &prev_y, out, outlink);
436 plot_freq(s, ch, a, 0, fg, &prev_y, out, outlink);
441 plot_freq(s, ch, a,
f, fg, &prev_y, out, outlink);
445 plot_freq(s, ch, 0, 0, fg, &prev_y, out, outlink);
451 plot_freq(s, ch, a,
f, fg, &prev_y, out, outlink);
567 .
inputs = showfreqs_inputs,
569 .priv_class = &showfreqs_class,
int64_t frame_count_in
Number of past frames sent through the link.
AVAudioFifo * av_audio_fifo_alloc(enum AVSampleFormat sample_fmt, int channels, int nb_samples)
Allocate an AVAudioFifo.
static int plot_freqs(AVFilterLink *inlink, AVFrame *in)
This structure describes decoded (raw) audio or video data.
#define av_realloc_f(p, o, n)
static av_cold int init(AVFilterContext *ctx)
av_cold void av_fft_end(FFTContext *s)
Main libavfilter public API header.
int h
agreed upon image height
void av_audio_fifo_free(AVAudioFifo *af)
Free an AVAudioFifo.
FF_FILTER_FORWARD_STATUS(inlink, outlink)
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
void av_fft_permute(FFTContext *s, FFTComplex *z)
Do the permutation needed BEFORE calling ff_fft_calc().
static void generate_window_func(float *lut, int N, int win_func, float *overlap)
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
AVFilterFormatsConfig outcfg
Lists of supported formats / etc.
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
const char * name
Pad name.
AVFilterLink ** inputs
array of pointers to input links
AVFilter ff_avf_showfreqs
#define av_assert0(cond)
assert() equivalent, that is always enabled.
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
static const AVFilterPad showfreqs_outputs[]
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
static int get_sx(ShowFreqsContext *s, int f)
#define FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink)
Forward the status on an output link to an input link.
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.
A filter pad used for either input or output.
static int query_formats(AVFilterContext *ctx)
A link between two filters.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static int activate(AVFilterContext *ctx)
static float get_bsize(ShowFreqsContext *s, int f)
AVRational frame_rate
Frame rate of the stream on the link, or 1/0 if unknown or variable; if left to 0/0, will be automatically copied from the first input of the source filter if it exists.
int sample_rate
samples per second
AVFrame * ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
Request an audio samples buffer with a specific set of permissions.
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
void * priv
private data for use by the filter
simple assert() macros that are a bit more flexible than ISO C assert().
FFTContext * av_fft_init(int nbits, int inverse)
Set up a complex FFT.
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Context for an Audio FIFO Buffer.
int w
agreed upon image width
AVFILTER_DEFINE_CLASS(showfreqs)
int av_audio_fifo_size(AVAudioFifo *af)
Get the current number of samples in the AVAudioFifo available for reading.
audio channel layout utility functions
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
AVFilterContext * src
source filter
static int config_output(AVFilterLink *outlink)
static const AVFilterPad outputs[]
int format
agreed upon media format
A list of supported channel layouts.
static void draw_dot(AVFrame *out, int x, int y, uint8_t fg[4])
static av_cold void uninit(AVFilterContext *ctx)
char * av_strdup(const char *s)
Duplicate a string.
AVSampleFormat
Audio sample formats.
static const AVOption showfreqs_options[]
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
static AVRational av_make_q(int num, int den)
Create an AVRational.
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.
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
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
Describe the class of an AVClass context structure.
static const AVFilterPad showfreqs_inputs[]
Rational number (pair of numerator and denominator).
const char * name
Filter name.
AVRational sample_aspect_ratio
agreed upon sample aspect ratio
offset must point to two consecutive integers
AVFilterLink ** outputs
array of pointers to output links
enum MovChannelLayoutTag * layouts
static enum AVPixelFormat pix_fmts[]
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
int av_audio_fifo_write(AVAudioFifo *af, void **data, int nb_samples)
Write data to an AVAudioFifo.
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
int av_audio_fifo_drain(AVAudioFifo *af, int nb_samples)
Drain data from an AVAudioFifo.
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()...
int channels
Number of channels.
AVFilterFormatsConfig incfg
Lists of supported formats / etc.
FF_FILTER_FORWARD_WANTED(outlink, inlink)
AVFilterContext * dst
dest filter
int av_audio_fifo_peek(AVAudioFifo *af, void **data, int nb_samples)
Peek data from an AVAudioFifo.
static enum AVSampleFormat sample_fmts[]
static void plot_freq(ShowFreqsContext *s, int ch, double a, int f, uint8_t fg[4], int *prev_y, AVFrame *out, AVFilterLink *outlink)
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
uint8_t ** extended_data
pointers to the data planes/channels.
static int filter_frame(AVFilterLink *inlink)
void av_fft_calc(FFTContext *s, FFTComplex *z)
Do a complex FFT with the parameters defined in av_fft_init().
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
AVPixelFormat
Pixel format.
mode
Use these values in ebur128_init (or'ed).
int nb_samples
number of audio samples (per channel) described by this frame
#define AV_NOPTS_VALUE
Undefined timestamp value.