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spectrum: support arbitrary bit depth

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Partially fixes #619045
This commit is contained in:
Alexander Kojevnikov 2010-05-24 21:50:58 +10:00 committed by Sebastian Dröge
parent 596331c6f0
commit c69dd320af
1 changed files with 11 additions and 4 deletions
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15
gst/spectrum/gstspectrum.c
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@ -110,14 +110,14 @@ GST_DEBUG_CATEGORY_STATIC (gst_spectrum_debug);
#define ALLOWED_CAPS \
"audio/x-raw-int, " \
" width = (int) 16, " \
" depth = (int) 16, " \
" depth = (int) [ 1, 16 ], " \
" signed = (boolean) true, " \
" endianness = (int) BYTE_ORDER, " \
" rate = (int) [ 1, MAX ], " \
" channels = (int) [ 1, MAX ]; " \
"audio/x-raw-int, " \
" width = (int) 32, " \
" depth = (int) 32, " \
" depth = (int) [ 1, 32 ], " \
" signed = (boolean) true, " \
" endianness = (int) BYTE_ORDER, " \
" rate = (int) [ 1, MAX ], " \
@ -483,6 +483,8 @@ gst_spectrum_transform_ip (GstBaseTransform * trans, GstBuffer * buffer)
guint i;
guint rate = GST_AUDIO_FILTER (spectrum)->format.rate;
guint channels = GST_AUDIO_FILTER (spectrum)->format.channels;
gfloat max_value =
(1UL << (GST_AUDIO_FILTER (spectrum)->format.depth - 1)) - 1;
guint width = GST_AUDIO_FILTER (spectrum)->format.width / 8;
gboolean fp = (GST_AUDIO_FILTER (spectrum)->format.type == GST_BUFTYPE_FLOAT);
guint bands = spectrum->bands;
@ -551,11 +553,16 @@ gst_spectrum_transform_ip (GstBaseTransform * trans, GstBuffer * buffer)
} else if (!fp && width == 4) {
gint32 *in = (gint32 *) data;
for (i = 0; i < channels; i++)
spectrum->input[spectrum->input_pos] += ((gfloat) in[i]) / G_MAXINT32;
/* max_value will be 0 when depth is 1, interpret -1 and 0
* as -1 and +1 if that's the case.
*/
spectrum->input[spectrum->input_pos] +=
max_value ? in[i] / max_value : in[i] * 2 + 1;
} else if (!fp && width == 2) {
gint16 *in = (gint16 *) data;
for (i = 0; i < channels; i++)
spectrum->input[spectrum->input_pos] += ((gfloat) in[i]) / G_MAXINT16;
spectrum->input[spectrum->input_pos] +=
max_value ? in[i] / max_value : in[i] * 2 + 1;
} else {
g_assert_not_reached ();
}