avfilter/avf_showcqt: rewrite showcqt and add features

add yuv444p, yuv422p, and yuv420p output format (lower cpu usage
on ffplay playback because it does not do format conversion)
custom size with size/s option (fullhd option is deprecated)
custom layout with bar_h, axis_h, and sono_h option
support rational frame rate (within fps/r/rate option)
relaxed frame rate restriction (support fractional sample step)
support all input sample rates
separate sonogram and bargraph volume (with volume/sono_v and
volume2/bar_v)
timeclamp option alias (timeclamp/tc)
fcount option
gamma option alias (gamma/sono_g and gamma2/bar_g)
support custom frequency range (basefreq and endfreq)
support drawing axis using external image file (axisfile option)
alias for disabling drawing to axis (text/axis)
possibility to optimize it using arch specific asm code

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

1 files changed, 112 insertions, 0 deletions

diff --git a/libavfilter/avf_showcqt.h b/libavfilter/avf_showcqt.h
new file mode 100644
index 0000000..244c690
--- /dev/null
+++ b/libavfilter/avf_showcqt.h
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2015 Muhammad Faiz <mfcc64@gmail.com>
+ *
+ * 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
+ */
+
+#ifndef AVFILTER_AVF_SHOWCQT_H
+#define AVFILTER_AVF_SHOWCQT_H
+
+#include "libavcodec/avfft.h"
+#include "avfilter.h"
+#include "internal.h"
+
+typedef struct {
+    FFTSample *val;
+    int start, len;
+} Coeffs;
+
+enum CoeffsType {
+    COEFFS_TYPE_DEFAULT,
+    COEFFS_TYPE_INTERLEAVE
+};
+
+typedef struct {
+    float r, g, b;
+} RGBFloat;
+
+typedef struct {
+    float y, u, v;
+} YUVFloat;
+
+typedef union {
+    RGBFloat rgb;
+    YUVFloat yuv;
+} ColorFloat;
+
+typedef struct {
+    const AVClass       *class;
+    AVFilterContext     *ctx;
+    AVFrame             *axis_frame;
+    AVFrame             *sono_frame;
+    enum AVPixelFormat  format;
+    int                 sono_idx;
+    int                 sono_count;
+    int                 step;
+    AVRational          step_frac;
+    int                 remaining_frac;
+    int                 remaining_fill;
+    int64_t             frame_count;
+    double              *freq;
+    FFTContext          *fft_ctx;
+    Coeffs              *coeffs;
+    FFTComplex          *fft_data;
+    FFTComplex          *fft_result;
+    FFTComplex          *cqt_result;
+    int                 fft_bits;
+    int                 fft_len;
+    int                 cqt_len;
+    int                 cqt_align;
+    enum CoeffsType     cqt_coeffs_type;
+    ColorFloat          *c_buf;
+    float               *h_buf;
+    float               *rcp_h_buf;
+    float               *sono_v_buf;
+    float               *bar_v_buf;
+    /* callback */
+    void                (*cqt_calc)(FFTComplex *dst, const FFTComplex *src, const Coeffs *coeffs,
+                                    int len, int fft_len);;
+    void                (*draw_bar)(AVFrame *out, const float *h, const float *rcp_h,
+                                    const ColorFloat *c, int bar_h);
+    void                (*draw_axis)(AVFrame *out, AVFrame *axis, const ColorFloat *c, int off);
+    void                (*draw_sono)(AVFrame *out, AVFrame *sono, int off, int idx);
+    void                (*update_sono)(AVFrame *sono, const ColorFloat *c, int idx);
+    /* option */
+    int                 width, height;
+    AVRational          rate;
+    int                 bar_h;
+    int                 axis_h;
+    int                 sono_h;
+    int                 fullhd; /* deprecated */
+    char                *sono_v;
+    char                *bar_v;
+    float               sono_g;
+    float               bar_g;
+    double              timeclamp;
+    double              basefreq;
+    double              endfreq;
+    float               coeffclamp; /* deprecated - ignored */
+    char                *tlength;
+    int                 count;
+    int                 fcount;
+    char                *fontfile;
+    char                *fontcolor;
+    char                *axisfile;
+    int                 axis;
+} ShowCQTContext;
+
+#endif