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level-example. avoid taking the arrays again for each channel for clarity

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Also introduce some blank lines for better readability and update the comments.
This commit is contained in:
Stefan Sauer 2013-02-05 08:26:14 +01:00
parent 682e49a752
commit 02956d7778
1 changed files with 19 additions and 16 deletions
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35
tests/examples/level/level-example.c
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@ -40,34 +40,37 @@ message_handler (GstBus * bus, GstMessage * message, gpointer data)
gdouble rms;
const GValue *array_val;
const GValue *value;
GValueArray *arr;
GValueArray *rms_arr, *peak_arr, *decay_arr;
gint i;
if (!gst_structure_get_clock_time (s, "endtime", &endtime))
g_warning ("Could not parse endtime");
/* we can get the number of channels as the length of any of the value
* lists */
array_val = gst_structure_get_value (s, "rms");
arr = (GValueArray *) g_value_get_boxed (array_val);
channels = arr->n_values;
/* the values are packed into GValueArrays with the value per channel */
array_val = gst_structure_get_value (s, "rms");
rms_arr = (GValueArray *) g_value_get_boxed (array_val);
array_val = gst_structure_get_value (s, "peak");
peak_arr = (GValueArray *) g_value_get_boxed (array_val);
array_val = gst_structure_get_value (s, "decay");
decay_arr = (GValueArray *) g_value_get_boxed (array_val);
/* we can get the number of channels as the length of any of the value
* arrays */
channels = rms_arr->n_values;
g_print ("endtime: %" GST_TIME_FORMAT ", channels: %d\n",
GST_TIME_ARGS (endtime), channels);
for (i = 0; i < channels; ++i) {
g_print ("channel %d\n", i);
array_val = gst_structure_get_value (s, "rms");
arr = (GValueArray *) g_value_get_boxed (array_val);
value = g_value_array_get_nth (arr, i);
value = g_value_array_get_nth (rms_arr, i);
rms_dB = g_value_get_double (value);
array_val = gst_structure_get_value (s, "peak");
arr = (GValueArray *) g_value_get_boxed (array_val);
value = g_value_array_get_nth (arr, i);
value = g_value_array_get_nth (peak_arr, i);
peak_dB = g_value_get_double (value);
array_val = gst_structure_get_value (s, "decay");
arr = (GValueArray *) g_value_get_boxed (array_val);
value = g_value_array_get_nth (arr, i);
value = g_value_array_get_nth (decay_arr, i);
decay_dB = g_value_get_double (value);
g_print (" RMS: %f dB, peak: %f dB, decay: %f dB\n",
rms_dB, peak_dB, decay_dB);