static gboolean
gst_spectra_scope_render (GstBaseAudioVisualizer * bscope, GstBuffer * audio,
GstBuffer * video)
{
GstSpectraScope *scope = GST_SPECTRA_SCOPE (bscope);
guint32 *vdata = (guint32 *) GST_BUFFER_DATA (video);
gint16 *adata = (gint16 *) g_memdup (GST_BUFFER_DATA (audio),
GST_BUFFER_SIZE (audio));
GstFFTS16Complex *fdata = scope->freq_data;
guint x, y, off;
guint l, h = bscope->height - 1;
gfloat fr, fi;
guint w = bscope->width;
if (bscope->channels > 1) {
guint ch = bscope->channels;
guint num_samples = GST_BUFFER_SIZE (audio) / (ch * sizeof (gint16));
guint i, c, v, s = 0;
/* deinterleave and mixdown adata */
for (i = 0; i < num_samples; i++) {
v = 0;
for (c = 0; c < ch; c++) {
v += adata[s++];
}
adata[i] = v / ch;
}
}
/* run fft */
gst_fft_s16_window (scope->fft_ctx, adata, GST_FFT_WINDOW_HAMMING);
gst_fft_s16_fft (scope->fft_ctx, adata, fdata);
g_free (adata);
/* draw lines */
for (x = 0; x < bscope->width; x++) {
/* figure out the range so that we don't need to clip,
* or even better do a log mapping? */
fr = (gfloat) fdata[1 + x].r / 512.0;
fi = (gfloat) fdata[1 + x].i / 512.0;
y = (guint) (h * fabs (fr * fr + fi * fi));
if (y > h)
y = h;
y = h - y;
off = (y * w) + x;
vdata[off] = 0x00FFFFFF;
for (l = y + 1; l <= h; l++) {
off += w;
add_pixel (&vdata[off], 0x007F7F7F);
}
}
return TRUE;
}
static gboolean
gst_spectra_scope_render (GstBaseAudioVisualizer * bscope, GstBuffer * audio,
GstBuffer * video)
{
GstSpectraScope *scope = GST_SPECTRA_SCOPE (bscope);
gint16 *mono_adata;
GstFFTS16Complex *fdata = scope->freq_data;
guint x, y, off;
guint l, h = bscope->height - 1;
gfloat fr, fi;
guint w = bscope->width;
GstMapInfo amap, vmap;
guint32 *vdata;
gint channels;
gst_buffer_map (audio, &amap, GST_MAP_READ);
gst_buffer_map (video, &vmap, GST_MAP_WRITE);
vdata = (guint32 *) vmap.data;
channels = GST_AUDIO_INFO_CHANNELS (&bscope->ainfo);
mono_adata = (gint16 *) g_memdup (amap.data, amap.size);
if (channels > 1) {
guint ch = channels;
guint num_samples = amap.size / (ch * sizeof (gint16));
guint i, c, v, s = 0;
/* deinterleave and mixdown adata */
for (i = 0; i < num_samples; i++) {
v = 0;
for (c = 0; c < ch; c++) {
v += mono_adata[s++];
}
mono_adata[i] = v / ch;
}
}
/* run fft */
gst_fft_s16_window (scope->fft_ctx, mono_adata, GST_FFT_WINDOW_HAMMING);
gst_fft_s16_fft (scope->fft_ctx, mono_adata, fdata);
g_free (mono_adata);
/* draw lines */
for (x = 0; x < bscope->width; x++) {
/* figure out the range so that we don't need to clip,
* or even better do a log mapping? */
fr = (gfloat) fdata[1 + x].r / 512.0;
fi = (gfloat) fdata[1 + x].i / 512.0;
y = (guint) (h * fabs (fr * fr + fi * fi));
if (y > h)
y = h;
y = h - y;
off = (y * w) + x;
vdata[off] = 0x00FFFFFF;
for (l = y + 1; l <= h; l++) {
off += w;
add_pixel (&vdata[off], 0x007F7F7F);
}
}
gst_buffer_unmap (video, &vmap);
gst_buffer_unmap (audio, &amap);
return TRUE;
}
static gboolean
gst_spectra_scope_render (GstAudioVisualizer * bscope, GstBuffer * audio,
GstVideoFrame * video)
{
GstSpectraScope *scope = GST_SPECTRA_SCOPE (bscope);
gint16 *mono_adata;
GstFFTS16Complex *fdata = scope->freq_data;
guint x, y, off, l;
guint w = GST_VIDEO_INFO_WIDTH (&bscope->vinfo);
guint h = GST_VIDEO_INFO_HEIGHT (&bscope->vinfo) - 1;
gfloat fr, fi;
GstMapInfo amap;
guint32 *vdata;
gint channels;
gst_buffer_map (audio, &amap, GST_MAP_READ);
vdata = (guint32 *) GST_VIDEO_FRAME_PLANE_DATA (video, 0);
channels = GST_AUDIO_INFO_CHANNELS (&bscope->ainfo);
mono_adata = (gint16 *) g_memdup (amap.data, amap.size);
if (channels > 1) {
guint ch = channels;
guint num_samples = amap.size / (ch * sizeof (gint16));
guint i, c, v, s = 0;
/* deinterleave and mixdown adata */
for (i = 0; i < num_samples; i++) {
v = 0;
for (c = 0; c < ch; c++) {
v += mono_adata[s++];
}
mono_adata[i] = v / ch;
}
}
/* run fft */
gst_fft_s16_window (scope->fft_ctx, mono_adata, GST_FFT_WINDOW_HAMMING);
gst_fft_s16_fft (scope->fft_ctx, mono_adata, fdata);
g_free (mono_adata);
/* draw lines */
for (x = 0; x < w; x++) {
/* figure out the range so that we don't need to clip,
* or even better do a log mapping? */
fr = (gfloat) fdata[1 + x].r / 512.0;
fi = (gfloat) fdata[1 + x].i / 512.0;
y = (guint) (h * sqrt (fr * fr + fi * fi));
if (y > h)
y = h;
y = h - y;
off = (y * w) + x;
vdata[off] = 0x00FFFFFF;
for (l = y; l < h; l++) {
off += w;
add_pixel (&vdata[off], 0x007F7F7F);
}
/* ensure bottom line is full bright (especially in move-up mode) */
add_pixel (&vdata[off], 0x007F7F7F);
}
gst_buffer_unmap (audio, &amap);
return TRUE;
}
