diff --git a/libavfilter/avf_showspectrum.c b/libavfilter/avf_showspectrum.c
index 49491b6646..73c783f04e 100644
--- a/libavfilter/avf_showspectrum.c
+++ b/libavfilter/avf_showspectrum.c
@@ -321,167 +321,165 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
             s->rdft_data[ch][n] = p[n] * s->window_func_lut[n];
     }
 
-    /* TODO reindent */
+    /* run RDFT on each samples set */
+    for (ch = 0; ch < s->nb_display_channels; ch++)
+        av_rdft_calc(s->rdft, s->rdft_data[ch]);
 
-        /* run RDFT on each samples set */
-        for (ch = 0; ch < s->nb_display_channels; ch++)
-            av_rdft_calc(s->rdft, s->rdft_data[ch]);
-
-        /* fill a new spectrum column */
+    /* fill a new spectrum column */
 #define RE(y, ch) s->rdft_data[ch][2 * (y) + 0]
 #define IM(y, ch) s->rdft_data[ch][2 * (y) + 1]
 #define MAGNITUDE(y, ch) hypot(RE(y, ch), IM(y, ch))
 
-        /* initialize buffer for combining to black */
-        for (y = 0; y < outlink->h; y++) {
-            s->combine_buffer[3 * y    ] = 0;
-            s->combine_buffer[3 * y + 1] = 127.5;
-            s->combine_buffer[3 * y + 2] = 127.5;
+    /* initialize buffer for combining to black */
+    for (y = 0; y < outlink->h; y++) {
+        s->combine_buffer[3 * y    ] = 0;
+        s->combine_buffer[3 * y + 1] = 127.5;
+        s->combine_buffer[3 * y + 2] = 127.5;
+    }
+
+    for (ch = 0; ch < s->nb_display_channels; ch++) {
+        float yf, uf, vf;
+
+        /* decide color range */
+        switch (s->mode) {
+        case COMBINED:
+            // reduce range by channel count
+            yf = 256.0f / s->nb_display_channels;
+            switch (s->color_mode) {
+            case INTENSITY:
+                uf = yf;
+                vf = yf;
+                break;
+            case CHANNEL:
+                /* adjust saturation for mixed UV coloring */
+                /* this factor is correct for infinite channels, an approximation otherwise */
+                uf = yf * M_PI;
+                vf = yf * M_PI;
+                break;
+            default:
+                av_assert0(0);
+            }
+            break;
+        case SEPARATE:
+            // full range
+            yf = 256.0f;
+            uf = 256.0f;
+            vf = 256.0f;
+            break;
+        default:
+            av_assert0(0);
         }
 
-        for (ch = 0; ch < s->nb_display_channels; ch++) {
-            float yf, uf, vf;
+        if (s->color_mode == CHANNEL) {
+            if (s->nb_display_channels > 1) {
+                uf *= 0.5 * sin((2 * M_PI * ch) / s->nb_display_channels);
+                vf *= 0.5 * cos((2 * M_PI * ch) / s->nb_display_channels);
+            } else {
+                uf = 0.0f;
+                vf = 0.0f;
+            }
+        }
+        uf *= s->saturation;
+        vf *= s->saturation;
 
-            /* decide color range */
-            switch (s->mode) {
-            case COMBINED:
-                // reduce range by channel count
-                yf = 256.0f / s->nb_display_channels;
-                switch (s->color_mode) {
-                case INTENSITY:
-                    uf = yf;
-                    vf = yf;
-                    break;
-                case CHANNEL:
-                    /* adjust saturation for mixed UV coloring */
-                    /* this factor is correct for infinite channels, an approximation otherwise */
-                    uf = yf * M_PI;
-                    vf = yf * M_PI;
-                    break;
-                default:
-                    av_assert0(0);
-                }
+        /* draw the channel */
+        for (y = 0; y < h; y++) {
+            int row = (s->mode == COMBINED) ? y : ch * h + y;
+            float *out = &s->combine_buffer[3 * row];
+
+            /* get magnitude */
+            float a = w * MAGNITUDE(y, ch);
+
+            /* apply scale */
+            switch (s->scale) {
+            case LINEAR:
                 break;
-            case SEPARATE:
-                // full range
-                yf = 256.0f;
-                uf = 256.0f;
-                vf = 256.0f;
+            case SQRT:
+                a = sqrt(a);
+                break;
+            case CBRT:
+                a = cbrt(a);
+                break;
+            case LOG:
+                a = 1 - log(FFMAX(FFMIN(1, a), 1e-6)) / log(1e-6); // zero = -120dBFS
                 break;
             default:
                 av_assert0(0);
             }
 
-            if (s->color_mode == CHANNEL) {
-                if (s->nb_display_channels > 1) {
-                    uf *= 0.5 * sin((2 * M_PI * ch) / s->nb_display_channels);
-                    vf *= 0.5 * cos((2 * M_PI * ch) / s->nb_display_channels);
+            if (s->color_mode == INTENSITY) {
+                float y, u, v;
+                int i;
+
+                for (i = 1; i < sizeof(intensity_color_table) / sizeof(*intensity_color_table) - 1; i++)
+                    if (intensity_color_table[i].a >= a)
+                        break;
+                // i now is the first item >= the color
+                // now we know to interpolate between item i - 1 and i
+                if (a <= intensity_color_table[i - 1].a) {
+                    y = intensity_color_table[i - 1].y;
+                    u = intensity_color_table[i - 1].u;
+                    v = intensity_color_table[i - 1].v;
+                } else if (a >= intensity_color_table[i].a) {
+                    y = intensity_color_table[i].y;
+                    u = intensity_color_table[i].u;
+                    v = intensity_color_table[i].v;
                 } else {
-                    uf = 0.0f;
-                    vf = 0.0f;
-                }
-            }
-            uf *= s->saturation;
-            vf *= s->saturation;
-
-            /* draw the channel */
-            for (y = 0; y < h; y++) {
-                int row = (s->mode == COMBINED) ? y : ch * h + y;
-                float *out = &s->combine_buffer[3 * row];
-
-                /* get magnitude */
-                float a = w * MAGNITUDE(y, ch);
-
-                /* apply scale */
-                switch (s->scale) {
-                case LINEAR:
-                    break;
-                case SQRT:
-                    a = sqrt(a);
-                    break;
-                case CBRT:
-                    a = cbrt(a);
-                    break;
-                case LOG:
-                    a = 1 - log(FFMAX(FFMIN(1, a), 1e-6)) / log(1e-6); // zero = -120dBFS
-                    break;
-                default:
-                    av_assert0(0);
+                    float start = intensity_color_table[i - 1].a;
+                    float end = intensity_color_table[i].a;
+                    float lerpfrac = (a - start) / (end - start);
+                    y = intensity_color_table[i - 1].y * (1.0f - lerpfrac)
+                      + intensity_color_table[i].y * lerpfrac;
+                    u = intensity_color_table[i - 1].u * (1.0f - lerpfrac)
+                      + intensity_color_table[i].u * lerpfrac;
+                    v = intensity_color_table[i - 1].v * (1.0f - lerpfrac)
+                      + intensity_color_table[i].v * lerpfrac;
                 }
 
-                if (s->color_mode == INTENSITY) {
-                    float y, u, v;
-                    int i;
-
-                    for (i = 1; i < sizeof(intensity_color_table) / sizeof(*intensity_color_table) - 1; i++)
-                        if (intensity_color_table[i].a >= a)
-                            break;
-                    // i now is the first item >= the color
-                    // now we know to interpolate between item i - 1 and i
-                    if (a <= intensity_color_table[i - 1].a) {
-                        y = intensity_color_table[i - 1].y;
-                        u = intensity_color_table[i - 1].u;
-                        v = intensity_color_table[i - 1].v;
-                    } else if (a >= intensity_color_table[i].a) {
-                        y = intensity_color_table[i].y;
-                        u = intensity_color_table[i].u;
-                        v = intensity_color_table[i].v;
-                    } else {
-                        float start = intensity_color_table[i - 1].a;
-                        float end = intensity_color_table[i].a;
-                        float lerpfrac = (a - start) / (end - start);
-                        y = intensity_color_table[i - 1].y * (1.0f - lerpfrac)
-                          + intensity_color_table[i].y * lerpfrac;
-                        u = intensity_color_table[i - 1].u * (1.0f - lerpfrac)
-                          + intensity_color_table[i].u * lerpfrac;
-                        v = intensity_color_table[i - 1].v * (1.0f - lerpfrac)
-                          + intensity_color_table[i].v * lerpfrac;
-                    }
-
-                    out[0] += y * yf;
-                    out[1] += u * uf;
-                    out[2] += v * vf;
-                } else {
-                    out[0] += a * yf;
-                    out[1] += a * uf;
-                    out[2] += a * vf;
-                }
+                out[0] += y * yf;
+                out[1] += u * uf;
+                out[2] += v * vf;
+            } else {
+                out[0] += a * yf;
+                out[1] += a * uf;
+                out[2] += a * vf;
             }
         }
+    }
 
-        /* copy to output */
-        if (s->sliding == SCROLL) {
-            for (plane = 0; plane < 3; plane++) {
-                for (y = 0; y < outlink->h; y++) {
-                    uint8_t *p = outpicref->data[plane] +
-                                 y * outpicref->linesize[plane];
-                    memmove(p, p + 1, outlink->w - 1);
-                }
-            }
-            s->xpos = outlink->w - 1;
-        }
+    /* copy to output */
+    if (s->sliding == SCROLL) {
         for (plane = 0; plane < 3; plane++) {
-            uint8_t *p = outpicref->data[plane] +
-                         (outlink->h - 1) * outpicref->linesize[plane] +
-                         s->xpos;
             for (y = 0; y < outlink->h; y++) {
-                *p = rint(FFMAX(0, FFMIN(s->combine_buffer[3 * y + plane], 255)));
-                p -= outpicref->linesize[plane];
+                uint8_t *p = outpicref->data[plane] +
+                             y * outpicref->linesize[plane];
+                memmove(p, p + 1, outlink->w - 1);
             }
         }
-
-        if (s->sliding != FULLFRAME || s->xpos == 0)
-            outpicref->pts = insamples->pts;
-
-        s->xpos++;
-        if (s->xpos >= outlink->w)
-            s->xpos = 0;
-        if (s->sliding != FULLFRAME || s->xpos == 0) {
-            s->req_fullfilled = 1;
-            ret = ff_filter_frame(outlink, av_frame_clone(s->outpicref));
-            if (ret < 0)
-                return ret;
+        s->xpos = outlink->w - 1;
+    }
+    for (plane = 0; plane < 3; plane++) {
+        uint8_t *p = outpicref->data[plane] +
+                     (outlink->h - 1) * outpicref->linesize[plane] +
+                     s->xpos;
+        for (y = 0; y < outlink->h; y++) {
+            *p = rint(FFMAX(0, FFMIN(s->combine_buffer[3 * y + plane], 255)));
+            p -= outpicref->linesize[plane];
         }
+    }
+
+    if (s->sliding != FULLFRAME || s->xpos == 0)
+        outpicref->pts = insamples->pts;
+
+    s->xpos++;
+    if (s->xpos >= outlink->w)
+        s->xpos = 0;
+    if (s->sliding != FULLFRAME || s->xpos == 0) {
+        s->req_fullfilled = 1;
+        ret = ff_filter_frame(outlink, av_frame_clone(s->outpicref));
+        if (ret < 0)
+            return ret;
+    }
 
     return win_size;
 }