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spectrum: code cleanup

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More comments and logging. Extract one complex condition to a variable. Reorder
some code for readability.
This commit is contained in:
Stefan Kost 2010-08-11 15:44:03 +03:00
parent 50a139de85
commit 8beead14d0
1 changed files with 25 additions and 15 deletions
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40
gst/spectrum/gstspectrum.c
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@ -405,9 +405,9 @@ gst_spectrum_start (GstBaseTransform * trans)
static gboolean
gst_spectrum_stop (GstBaseTransform * trans)
{
GstSpectrum *filter = GST_SPECTRUM (trans);
GstSpectrum *spectrum = GST_SPECTRUM (trans);
gst_spectrum_reset_state (filter);
gst_spectrum_reset_state (spectrum);
return TRUE;
}
@ -509,6 +509,7 @@ gst_spectrum_transform_ip (GstBaseTransform * trans, GstBuffer * buffer)
GstFFTF32 *fft_ctx;
const guint8 *data = GST_BUFFER_DATA (buffer);
guint size = GST_BUFFER_SIZE (buffer);
gboolean have_full_interval;
GST_LOG_OBJECT (spectrum, "input size: %d bytes", GST_BUFFER_SIZE (buffer));
@ -521,12 +522,15 @@ gst_spectrum_transform_ip (GstBaseTransform * trans, GstBuffer * buffer)
* changes) get one and allocate memory for everything
*/
if (spectrum->fft_ctx == NULL) {
GST_DEBUG_OBJECT (spectrum, "allocating for bands %u", bands);
spectrum->fft_ctx = gst_fft_f32_new (nfft, FALSE);
spectrum->input = g_new0 (gfloat, nfft);
spectrum->input_tmp = g_new0 (gfloat, nfft);
spectrum->freqdata = g_new0 (GstFFTF32Complex, bands);
spectrum->spect_magnitude = g_new0 (gfloat, bands);
spectrum->spect_phase = g_new0 (gfloat, bands);
spectrum->fft_ctx = gst_fft_f32_new (nfft, FALSE);
spectrum->frames_per_interval =
gst_util_uint64_scale (spectrum->interval, rate, GST_SECOND);
spectrum->error_per_interval = (spectrum->interval * rate) % GST_SECOND;
@ -597,17 +601,19 @@ gst_spectrum_transform_ip (GstBaseTransform * trans, GstBuffer * buffer)
spectrum->input_pos = (spectrum->input_pos + 1) % nfft;
spectrum->num_frames++;
have_full_interval = (
(spectrum->accumulated_error < GST_SECOND
&& spectrum->num_frames == spectrum->frames_per_interval) ||
(spectrum->accumulated_error >= GST_SECOND
&& spectrum->num_frames - 1 == spectrum->frames_per_interval)
);
/* If we have enough frames for an FFT or we
* have all frames required for the interval run
* an FFT. In the last case we probably take the
* FFT of frames that we already handled.
*/
if (spectrum->num_frames % nfft == 0 ||
((spectrum->accumulated_error < GST_SECOND
&& spectrum->num_frames == spectrum->frames_per_interval)
|| (spectrum->accumulated_error >= GST_SECOND
&& spectrum->num_frames - 1 ==
spectrum->frames_per_interval))) {
if ((spectrum->num_frames % nfft == 0) || have_full_interval) {
for (i = 0; i < nfft; i++)
input_tmp[i] = input[(spectrum->input_pos + i) % nfft];
@ -635,10 +641,12 @@ gst_spectrum_transform_ip (GstBaseTransform * trans, GstBuffer * buffer)
}
/* Do we have the FFTs for one interval? */
if ((spectrum->accumulated_error < GST_SECOND
&& spectrum->num_frames == spectrum->frames_per_interval)
|| (spectrum->accumulated_error >= GST_SECOND
&& spectrum->num_frames - 1 == spectrum->frames_per_interval)) {
if (have_full_interval) {
GST_INFO ("nfft: %u num_frames: %" G_GUINT64_FORMAT " fpi: %"
G_GUINT64_FORMAT " error: %" GST_TIME_FORMAT, nfft,
spectrum->num_frames, spectrum->frames_per_interval,
GST_TIME_ARGS (spectrum->accumulated_error));
if (spectrum->accumulated_error >= GST_SECOND)
spectrum->accumulated_error -= GST_SECOND;
@ -659,12 +667,14 @@ gst_spectrum_transform_ip (GstBaseTransform * trans, GstBuffer * buffer)
gst_element_post_message (GST_ELEMENT (spectrum), m);
}
memset (spect_magnitude, 0, bands * sizeof (gfloat));
memset (spect_phase, 0, bands * sizeof (gfloat));
if (GST_CLOCK_TIME_IS_VALID (spectrum->message_ts))
spectrum->message_ts +=
gst_util_uint64_scale (spectrum->num_frames, GST_SECOND, rate);
/* reset spectrum accumulators */
memset (spect_magnitude, 0, bands * sizeof (gfloat));
memset (spect_phase, 0, bands * sizeof (gfloat));
spectrum->num_frames = 0;
spectrum->num_fft = 0;
}