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spectrascope: make a copy of the audiodata before downmixing and windowing

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The buffers come from the adapter and the data might overlap. We don't want to
modify it in place.
This commit is contained in:
Stefan Kost 2011-08-12 16:57:49 +02:00
parent d576e23aa4
commit 058c63d185
1 changed files with 3 additions and 1 deletions
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4
gst/audiovisualizers/gstspectrascope.c
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@ -165,7 +165,8 @@ gst_spectra_scope_render (GstBaseAudioVisualizer * bscope, GstBuffer * audio,
{
GstSpectraScope *scope = GST_SPECTRA_SCOPE (bscope);
guint32 *vdata = (guint32 *) GST_BUFFER_DATA (video);
gint16 *adata = (gint16 *) GST_BUFFER_DATA (audio);
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;
@ -190,6 +191,7 @@ gst_spectra_scope_render (GstBaseAudioVisualizer * bscope, GstBuffer * audio,
/* 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++) {