mirror of https://github.com/FFmpeg/FFmpeg.git
Paul B Mahol
6 years ago
parent
9c35285aea
commit
b19550367f
6 changed files with 432 additions and 2 deletions
@ -0,0 +1,375 @@ |
||||
/*
|
||||
* Copyright (c) 2019 Paul B Mahol |
||||
* |
||||
* This file is part of FFmpeg. |
||||
* |
||||
* FFmpeg is free software; you can redistribute it and/or |
||||
* modify it under the terms of the GNU Lesser General Public |
||||
* License as published by the Free Software Foundation; either |
||||
* version 2.1 of the License, or (at your option) any later version. |
||||
* |
||||
* FFmpeg is distributed in the hope that it will be useful, |
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
||||
* Lesser General Public License for more details. |
||||
* |
||||
* You should have received a copy of the GNU Lesser General Public |
||||
* License along with FFmpeg; if not, write to the Free Software |
||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
||||
*/ |
||||
|
||||
#include <float.h> |
||||
#include <math.h> |
||||
|
||||
#include "libavcodec/avfft.h" |
||||
#include "libavutil/audio_fifo.h" |
||||
#include "libavutil/avassert.h" |
||||
#include "libavutil/channel_layout.h" |
||||
#include "libavutil/opt.h" |
||||
#include "libavutil/parseutils.h" |
||||
#include "audio.h" |
||||
#include "video.h" |
||||
#include "avfilter.h" |
||||
#include "filters.h" |
||||
#include "internal.h" |
||||
#include "window_func.h" |
||||
|
||||
typedef struct ShowSpatialContext { |
||||
const AVClass *class; |
||||
int w, h; |
||||
AVRational frame_rate; |
||||
FFTContext *fft[2]; ///< Fast Fourier Transform context
|
||||
FFTContext *ifft[2]; ///< Inverse Fast Fourier Transform context
|
||||
int fft_bits; ///< number of bits (FFT window size = 1<<fft_bits)
|
||||
FFTComplex *fft_data[2]; ///< bins holder for each (displayed) channels
|
||||
float *window_func_lut; ///< Window function LUT
|
||||
int win_func; |
||||
int win_size; |
||||
int buf_size; |
||||
float overlap; |
||||
int consumed; |
||||
int hop_size; |
||||
AVAudioFifo *fifo; |
||||
int64_t pts; |
||||
} ShowSpatialContext; |
||||
|
||||
#define OFFSET(x) offsetof(ShowSpatialContext, x) |
||||
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
||||
|
||||
static const AVOption showspatial_options[] = { |
||||
{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "512x512"}, 0, 0, FLAGS }, |
||||
{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "512x512"}, 0, 0, FLAGS }, |
||||
{ "win_size", "set window size", OFFSET(win_size), AV_OPT_TYPE_INT, {.i64 = 4096}, 1024, 65536, FLAGS }, |
||||
{ "win_func", "set window function", OFFSET(win_func), AV_OPT_TYPE_INT, {.i64 = WFUNC_HANNING}, 0, NB_WFUNC-1, FLAGS, "win_func" }, |
||||
{ "rect", "Rectangular", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_RECT}, 0, 0, FLAGS, "win_func" }, |
||||
{ "bartlett", "Bartlett", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BARTLETT}, 0, 0, FLAGS, "win_func" }, |
||||
{ "hann", "Hann", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING}, 0, 0, FLAGS, "win_func" }, |
||||
{ "hanning", "Hanning", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING}, 0, 0, FLAGS, "win_func" }, |
||||
{ "hamming", "Hamming", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HAMMING}, 0, 0, FLAGS, "win_func" }, |
||||
{ "blackman", "Blackman", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BLACKMAN}, 0, 0, FLAGS, "win_func" }, |
||||
{ "welch", "Welch", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_WELCH}, 0, 0, FLAGS, "win_func" }, |
||||
{ "flattop", "Flat-top", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_FLATTOP}, 0, 0, FLAGS, "win_func" }, |
||||
{ "bharris", "Blackman-Harris", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHARRIS}, 0, 0, FLAGS, "win_func" }, |
||||
{ "bnuttall", "Blackman-Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BNUTTALL}, 0, 0, FLAGS, "win_func" }, |
||||
{ "bhann", "Bartlett-Hann", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHANN}, 0, 0, FLAGS, "win_func" }, |
||||
{ "sine", "Sine", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_SINE}, 0, 0, FLAGS, "win_func" }, |
||||
{ "nuttall", "Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_NUTTALL}, 0, 0, FLAGS, "win_func" }, |
||||
{ "lanczos", "Lanczos", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_LANCZOS}, 0, 0, FLAGS, "win_func" }, |
||||
{ "gauss", "Gauss", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_GAUSS}, 0, 0, FLAGS, "win_func" }, |
||||
{ "tukey", "Tukey", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_TUKEY}, 0, 0, FLAGS, "win_func" }, |
||||
{ "dolph", "Dolph-Chebyshev", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_DOLPH}, 0, 0, FLAGS, "win_func" }, |
||||
{ "cauchy", "Cauchy", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_CAUCHY}, 0, 0, FLAGS, "win_func" }, |
||||
{ "parzen", "Parzen", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_PARZEN}, 0, 0, FLAGS, "win_func" }, |
||||
{ "poisson", "Poisson", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_POISSON}, 0, 0, FLAGS, "win_func" }, |
||||
{ "bohman", "Bohman", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BOHMAN}, 0, 0, FLAGS, "win_func" }, |
||||
{ "overlap", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGS }, |
||||
{ NULL } |
||||
}; |
||||
|
||||
AVFILTER_DEFINE_CLASS(showspatial); |
||||
|
||||
static av_cold void uninit(AVFilterContext *ctx) |
||||
{ |
||||
ShowSpatialContext *s = ctx->priv; |
||||
int i; |
||||
|
||||
for (i = 0; i < 2; i++) |
||||
av_fft_end(s->fft[i]); |
||||
for (i = 0; i < 2; i++) |
||||
av_fft_end(s->ifft[i]); |
||||
for (i = 0; i < 2; i++) |
||||
av_freep(&s->fft_data[i]); |
||||
av_freep(&s->window_func_lut); |
||||
av_audio_fifo_free(s->fifo); |
||||
} |
||||
|
||||
static int query_formats(AVFilterContext *ctx) |
||||
{ |
||||
AVFilterFormats *formats = NULL; |
||||
AVFilterChannelLayouts *layout = NULL; |
||||
AVFilterLink *inlink = ctx->inputs[0]; |
||||
AVFilterLink *outlink = ctx->outputs[0]; |
||||
static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE }; |
||||
static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_GBRP, AV_PIX_FMT_NONE }; |
||||
int ret; |
||||
|
||||
formats = ff_make_format_list(sample_fmts); |
||||
if ((ret = ff_formats_ref (formats, &inlink->out_formats )) < 0 || |
||||
(ret = ff_add_channel_layout (&layout, AV_CH_LAYOUT_STEREO )) < 0 || |
||||
(ret = ff_channel_layouts_ref (layout , &inlink->out_channel_layouts)) < 0) |
||||
return ret; |
||||
|
||||
formats = ff_all_samplerates(); |
||||
if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0) |
||||
return ret; |
||||
|
||||
formats = ff_make_format_list(pix_fmts); |
||||
if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0) |
||||
return ret; |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
static int run_channel_fft(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
||||
{ |
||||
ShowSpatialContext *s = ctx->priv; |
||||
const float *window_func_lut = s->window_func_lut; |
||||
AVFrame *fin = arg; |
||||
const int ch = jobnr; |
||||
const float *p = (float *)fin->extended_data[ch]; |
||||
|
||||
for (int n = 0; n < fin->nb_samples; n++) { |
||||
s->fft_data[ch][n].re = p[n] * window_func_lut[n]; |
||||
s->fft_data[ch][n].im = 0; |
||||
} |
||||
|
||||
av_fft_permute(s->fft[ch], s->fft_data[ch]); |
||||
av_fft_calc(s->fft[ch], s->fft_data[ch]); |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
static int config_output(AVFilterLink *outlink) |
||||
{ |
||||
AVFilterContext *ctx = outlink->src; |
||||
AVFilterLink *inlink = ctx->inputs[0]; |
||||
ShowSpatialContext *s = ctx->priv; |
||||
int i, fft_bits, h, w; |
||||
float overlap; |
||||
|
||||
outlink->w = s->w; |
||||
outlink->h = s->h; |
||||
outlink->sample_aspect_ratio = (AVRational){1,1}; |
||||
|
||||
h = s->h; |
||||
w = s->w; |
||||
|
||||
s->buf_size = 1 << av_log2(s->win_size); |
||||
s->win_size = s->buf_size; |
||||
fft_bits = av_log2(s->win_size); |
||||
|
||||
/* (re-)configuration if the video output changed (or first init) */ |
||||
if (fft_bits != s->fft_bits) { |
||||
s->fft_bits = fft_bits; |
||||
|
||||
/* FFT buffers: x2 for each channel buffer.
|
||||
* Note: we use free and malloc instead of a realloc-like function to |
||||
* make sure the buffer is aligned in memory for the FFT functions. */ |
||||
for (i = 0; i < 2; i++) { |
||||
av_fft_end(s->fft[i]); |
||||
av_freep(&s->fft_data[i]); |
||||
} |
||||
for (i = 0; i < 2; i++) { |
||||
s->fft[i] = av_fft_init(fft_bits, 0); |
||||
if (!s->fft[i]) { |
||||
av_log(ctx, AV_LOG_ERROR, "Unable to create FFT context. " |
||||
"The window size might be too high.\n"); |
||||
return AVERROR(EINVAL); |
||||
} |
||||
} |
||||
|
||||
for (i = 0; i < 2; i++) { |
||||
s->fft_data[i] = av_calloc(s->buf_size, sizeof(**s->fft_data)); |
||||
if (!s->fft_data[i]) |
||||
return AVERROR(ENOMEM); |
||||
} |
||||
|
||||
/* pre-calc windowing function */ |
||||
s->window_func_lut = |
||||
av_realloc_f(s->window_func_lut, s->win_size, |
||||
sizeof(*s->window_func_lut)); |
||||
if (!s->window_func_lut) |
||||
return AVERROR(ENOMEM); |
||||
generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap); |
||||
if (s->overlap == 1) |
||||
s->overlap = overlap; |
||||
|
||||
s->hop_size = (1.f - s->overlap) * s->win_size; |
||||
if (s->hop_size < 1) { |
||||
av_log(ctx, AV_LOG_ERROR, "overlap %f too big\n", s->overlap); |
||||
return AVERROR(EINVAL); |
||||
} |
||||
} |
||||
|
||||
outlink->time_base = av_inv_q(outlink->frame_rate); |
||||
|
||||
av_audio_fifo_free(s->fifo); |
||||
s->fifo = av_audio_fifo_alloc(inlink->format, inlink->channels, s->win_size); |
||||
if (!s->fifo) |
||||
return AVERROR(ENOMEM); |
||||
return 0; |
||||
} |
||||
|
||||
#define RE(y, ch) s->fft_data[ch][y].re |
||||
#define IM(y, ch) s->fft_data[ch][y].im |
||||
|
||||
static void draw_dot(uint8_t *dst, int linesize, int value) |
||||
{ |
||||
dst[0] = value; |
||||
dst[1] = value; |
||||
dst[-1] = value; |
||||
dst[linesize] = value; |
||||
dst[-linesize] = value; |
||||
} |
||||
|
||||
static int draw_spatial(AVFilterLink *inlink, AVFrame *insamples) |
||||
{ |
||||
AVFilterContext *ctx = inlink->dst; |
||||
AVFilterLink *outlink = ctx->outputs[0]; |
||||
ShowSpatialContext *s = ctx->priv; |
||||
AVFrame *outpicref; |
||||
int h = s->h - 2; |
||||
int w = s->w - 2; |
||||
int z = s->win_size / 2; |
||||
|
||||
outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
||||
if (!outpicref) |
||||
return AVERROR(ENOMEM); |
||||
|
||||
outpicref->sample_aspect_ratio = (AVRational){1,1}; |
||||
for (int i = 0; i < outlink->h; i++) { |
||||
memset(outpicref->data[0] + i * outpicref->linesize[0], 0, outlink->w); |
||||
memset(outpicref->data[1] + i * outpicref->linesize[1], 0, outlink->w); |
||||
memset(outpicref->data[2] + i * outpicref->linesize[2], 0, outlink->w); |
||||
} |
||||
|
||||
for (int j = 0; j < z; j++) { |
||||
const int idx = z - 1 - j; |
||||
float l = hypotf(RE(idx, 0), IM(idx, 0)); |
||||
float r = hypotf(RE(idx, 1), IM(idx, 1)); |
||||
float sum = l + r; |
||||
float lp = atan2f(IM(idx, 0), RE(idx, 0)); |
||||
float rp = atan2f(IM(idx, 1), RE(idx, 1)); |
||||
float diffp = ((rp - lp) / (2.f * M_PI) + 1.f) * 0.5f; |
||||
float diff = (sum < 0.000001f ? 0.f : (r - l) / sum) * 0.5f + 0.5f; |
||||
float cr = av_clipf(cbrtf(l / sum), 0, 1) * 255.f; |
||||
float cb = av_clipf(cbrtf(r / sum), 0, 1) * 255.f; |
||||
float cg; |
||||
int x, y; |
||||
|
||||
cg = diffp * 255.f; |
||||
x = av_clip(w * diff, 0, w - 2) + 1; |
||||
y = av_clip(h * diffp, 0, h - 2) + 1; |
||||
|
||||
draw_dot(outpicref->data[0] + outpicref->linesize[0] * y + x, outpicref->linesize[0], cg); |
||||
draw_dot(outpicref->data[1] + outpicref->linesize[1] * y + x, outpicref->linesize[1], cb); |
||||
draw_dot(outpicref->data[2] + outpicref->linesize[2] * y + x, outpicref->linesize[2], cr); |
||||
} |
||||
|
||||
outpicref->pts = av_rescale_q(insamples->pts, inlink->time_base, outlink->time_base); |
||||
|
||||
return ff_filter_frame(outlink, outpicref); |
||||
} |
||||
|
||||
static int spatial_activate(AVFilterContext *ctx) |
||||
{ |
||||
AVFilterLink *inlink = ctx->inputs[0]; |
||||
AVFilterLink *outlink = ctx->outputs[0]; |
||||
ShowSpatialContext *s = ctx->priv; |
||||
int ret; |
||||
|
||||
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink); |
||||
|
||||
if (av_audio_fifo_size(s->fifo) < s->win_size) { |
||||
AVFrame *frame = NULL; |
||||
|
||||
ret = ff_inlink_consume_frame(inlink, &frame); |
||||
if (ret < 0) |
||||
return ret; |
||||
if (ret > 0) { |
||||
s->pts = frame->pts; |
||||
s->consumed = 0; |
||||
|
||||
av_audio_fifo_write(s->fifo, (void **)frame->extended_data, frame->nb_samples); |
||||
av_frame_free(&frame); |
||||
} |
||||
} |
||||
|
||||
if (av_audio_fifo_size(s->fifo) >= s->win_size) { |
||||
AVFrame *fin = ff_get_audio_buffer(inlink, s->win_size); |
||||
if (!fin) |
||||
return AVERROR(ENOMEM); |
||||
|
||||
fin->pts = s->pts + s->consumed; |
||||
s->consumed += s->hop_size; |
||||
ret = av_audio_fifo_peek(s->fifo, (void **)fin->extended_data, |
||||
FFMIN(s->win_size, av_audio_fifo_size(s->fifo))); |
||||
if (ret < 0) { |
||||
av_frame_free(&fin); |
||||
return ret; |
||||
} |
||||
|
||||
av_assert0(fin->nb_samples == s->win_size); |
||||
|
||||
ctx->internal->execute(ctx, run_channel_fft, fin, NULL, 2); |
||||
|
||||
ret = draw_spatial(inlink, fin); |
||||
|
||||
av_frame_free(&fin); |
||||
av_audio_fifo_drain(s->fifo, s->hop_size); |
||||
if (ret <= 0) |
||||
return ret; |
||||
} |
||||
|
||||
FF_FILTER_FORWARD_STATUS(inlink, outlink); |
||||
if (ff_outlink_frame_wanted(outlink) && av_audio_fifo_size(s->fifo) < s->win_size) { |
||||
ff_inlink_request_frame(inlink); |
||||
return 0; |
||||
} |
||||
|
||||
if (av_audio_fifo_size(s->fifo) >= s->win_size) { |
||||
ff_filter_set_ready(ctx, 10); |
||||
return 0; |
||||
} |
||||
return FFERROR_NOT_READY; |
||||
} |
||||
|
||||
static const AVFilterPad showspatial_inputs[] = { |
||||
{ |
||||
.name = "default", |
||||
.type = AVMEDIA_TYPE_AUDIO, |
||||
}, |
||||
{ NULL } |
||||
}; |
||||
|
||||
static const AVFilterPad showspatial_outputs[] = { |
||||
{ |
||||
.name = "default", |
||||
.type = AVMEDIA_TYPE_VIDEO, |
||||
.config_props = config_output, |
||||
}, |
||||
{ NULL } |
||||
}; |
||||
|
||||
AVFilter ff_avf_showspatial = { |
||||
.name = "showspatial", |
||||
.description = NULL_IF_CONFIG_SMALL("Convert input audio to a spatial video output."), |
||||
.uninit = uninit, |
||||
.query_formats = query_formats, |
||||
.priv_size = sizeof(ShowSpatialContext), |
||||
.inputs = showspatial_inputs, |
||||
.outputs = showspatial_outputs, |
||||
.activate = spatial_activate, |
||||
.priv_class = &showspatial_class, |
||||
.flags = AVFILTER_FLAG_SLICE_THREADS, |
||||
}; |
||||
Loading…
Reference in new issue