67 #define OFFSET(x) offsetof(ShowFreqsContext, x)
68 #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 },
161 for (n = 0; n <
N; n++)
166 for (n = 0; n <
N; n++)
167 lut[n] = 1.-
FFABS((n-(N-1)/2.)/((N-1)/2.));
171 for (n = 0; n <
N; n++)
172 lut[n] = .5*(1-cos(2*
M_PI*n/(N-1)));
176 for (n = 0; n <
N; n++)
177 lut[n] = .54-.46*cos(2*
M_PI*n/(N-1));
181 for (n = 0; n <
N; n++)
182 lut[n] = .42659-.49656*cos(2*
M_PI*n/(N-1))+.076849*cos(4*
M_PI*n/(N-1));
186 for (n = 0; n <
N; n++)
187 lut[n] = 1.-(n-(N-1)/2.)/((N-1)/2.)*(n-(N-1)/2.)/((N-1)/2.);
191 for (n = 0; n <
N; n++)
192 lut[n] = 1.-1.985844164102*cos( 2*
M_PI*n/(N-1))+1.791176438506*cos( 4*
M_PI*n/(N-1))-
193 1.282075284005*cos( 6*
M_PI*n/(N-1))+0.667777530266*cos( 8*
M_PI*n/(N-1))-
194 0.240160796576*cos(10*
M_PI*n/(N-1))+0.056656381764*cos(12*
M_PI*n/(N-1))-
195 0.008134974479*cos(14*
M_PI*n/(N-1))+0.000624544650*cos(16*
M_PI*n/(N-1))-
196 0.000019808998*cos(18*
M_PI*n/(N-1))+0.000000132974*cos(20*
M_PI*n/(N-1));
200 for (n = 0; n <
N; n++)
201 lut[n] = 0.35875-0.48829*cos(2*
M_PI*n/(N-1))+0.14128*cos(4*
M_PI*n/(N-1))-0.01168*cos(6*
M_PI*n/(N-1));
205 for (n = 0; n <
N; n++)
206 lut[n] = 0.3635819-0.4891775*cos(2*
M_PI*n/(N-1))+0.1365995*cos(4*
M_PI*n/(N-1))-0.0106411*cos(6*
M_PI*n/(N-1));
210 for (n = 0; n <
N; n++)
211 lut[n] = 0.62-0.48*
FFABS(n/(
double)(N-1)-.5)-0.38*cos(2*
M_PI*n/(N-1));
215 for (n = 0; n <
N; n++)
216 lut[n] = sin(
M_PI*n/(N-1));
220 for (n = 0; n <
N; n++)
221 lut[n] = 0.355768-0.487396*cos(2*
M_PI*n/(N-1))+0.144232*cos(4*
M_PI*n/(N-1))-0.012604*cos(6*
M_PI*n/(N-1));
244 "The window size might be too high.\n");
286 for (s->
scale = 0, i = 0; i < s->win_size; i++) {
307 if ((color & 0xffffff) != 0)
321 return pow(s->
w, f/(s->
nb_freq-1.));
336 return pow(s->
w, (f+1)/(s->
nb_freq-1.))-
344 double a,
int f,
uint8_t fg[4],
int *prev_y,
348 const float avg = s->
avg_data[ch][f];
350 const int sx =
get_sx(s, f);
361 a = log(av_clipd(a, 1e-6, 1)) / log(1e-6);
367 y = a * outlink->
h - 1;
389 for (x = sx + 1; x < sx + bsize && x < w; x++)
391 for (i = y; i <= *prev_y; i++)
394 for (i = *prev_y; i <=
y; i++)
396 for (x = sx + 1; x < sx + bsize && x < w; x++)
402 for (x = sx; x < sx + bsize && x < w; x++)
403 for (i = y; i < outlink->
h; i++)
407 for (x = sx; x < sx + bsize && x < w; x++)
427 for (n = 0; n < outlink->
h; n++)
428 memset(out->
data[0] + out->
linesize[0] * n, 0, outlink->
w * 4);
438 for (; n < win_size; n++) {
450 #define RE(x, ch) s->fft_data[ch][x].re
451 #define IM(x, ch) s->fft_data[ch][x].im
452 #define M(a, b) (sqrt((a) * (a) + (b) * (b)))
461 uint8_t fg[4] = { 0xff, 0xff, 0xff, 0xff };
469 a = av_clipd(
M(
RE(0, ch), 0) / s->
scale, 0, 1);
470 plot_freq(s, ch, a, 0, fg, &prev_y, out, outlink);
472 for (f = 1; f < s->
nb_freq; f++) {
473 a = av_clipd(
M(
RE(f, ch),
IM(f, ch)) / s->
scale, 0, 1);
475 plot_freq(s, ch, a, f, fg, &prev_y, out, outlink);
558 .
inputs = showfreqs_inputs,
560 .priv_class = &showfreqs_class,
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)
av_cold void av_fft_end(FFTContext *s)
static const AVFilterPad outputs[]
Main libavfilter public API header.
int h
agreed upon image height
void av_audio_fifo_free(AVAudioFifo *af)
Free an AVAudioFifo.
void av_fft_permute(FFTContext *s, FFTComplex *z)
Do the permutation needed BEFORE calling ff_fft_calc().
static enum AVSampleFormat formats[]
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
static AVRational av_make_q(int num, int den)
Create a rational.
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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)
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 av_always_inline double cbrt(double x)
unsigned flags
Link processing flags.
static float get_bsize(ShowFreqsContext *s, int f)
AVRational frame_rate
Frame rate of the stream on the link, or 1/0 if unknown; if left to 0/0, will be automatically be cop...
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().
struct AVFilterChannelLayouts * out_channel_layouts
FFTContext * av_fft_init(int nbits, int inverse)
Set up a complex FFT.
AVFilterFormats * in_formats
Lists of formats and channel layouts supported by the input and output filters respectively.
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Context for an Audio FIFO Buffer.
int w
agreed upon image width
AVFILTER_DEFINE_CLASS(showfreqs)
static void generate_window_func(float *lut, int N, int win_func, float *overlap)
int av_audio_fifo_size(AVAudioFifo *af)
Get the current number of samples in the AVAudioFifo available for reading.
audio channel layout utility functions
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
AVFilterContext * src
source filter
static int config_output(AVFilterLink *outlink)
Frame requests may need to loop in order to be fulfilled.
AVFilterFormats * out_samplerates
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)
AVSampleFormat
Audio sample formats.
char * av_strdup(const char *s)
Duplicate the string s.
static const AVOption showfreqs_options[]
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
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
Describe the class of an AVClass context structure.
static const AVFilterPad showfreqs_inputs[]
static const AVFilterPad inputs[]
rational number numerator/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[]
void * av_calloc(size_t nmemb, size_t size)
Allocate a block of nmemb * size bytes with alignment suitable for all memory accesses (including vec...
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.
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.
AVFilterContext * dst
dest filter
int av_audio_fifo_peek(AVAudioFifo *af, void **data, int nb_samples)
Peek data from an AVAudioFifo.
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
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)
uint8_t ** extended_data
pointers to the data planes/channels.
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.
int nb_samples
number of audio samples (per channel) described by this frame
int64_t frame_count
Number of past frames sent through the link.
AVFilterFormats * out_formats