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level: resync on discont

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Drop pending data on discont and start a new cycle with a new base timestamp.
Cleanup some variables.
This commit is contained in:
Stefan Sauer 2013-04-04 22:48:45 +02:00
parent 3d335cb1ed
commit b79f667ef4
2 changed files with 19 additions and 12 deletions
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23
gst/level/gstlevel.c
View file

@ -607,6 +607,10 @@ gst_level_transform_ip (GstBaseTransform * trans, GstBuffer * in)
g_return_val_if_fail (num_int_samples % channels == 0, GST_FLOW_ERROR);
if (GST_BUFFER_FLAG_IS_SET (in, GST_BUFFER_FLAG_DISCONT)) {
filter->message_ts = GST_BUFFER_TIMESTAMP (in);
filter->num_frames = 0;
}
if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (filter->message_ts))) {
filter->message_ts = GST_BUFFER_TIMESTAMP (in);
}
@ -711,12 +715,13 @@ gst_level_post_message (GstLevel * filter)
m = gst_level_message_new (filter, filter->message_ts, duration);
GST_LOG_OBJECT (filter,
"message: ts %" GST_TIME_FORMAT ", num_frames %d",
GST_TIME_ARGS (filter->message_ts), filter->num_frames);
"message: ts %" GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
", num_frames %d", GST_TIME_ARGS (filter->message_ts),
GST_TIME_ARGS (duration), filter->num_frames);
for (i = 0; i < channels; ++i) {
gdouble RMS;
gdouble RMSdB, lastdB, decaydB;
gdouble RMSdB, peakdB, decaydB;
RMS = sqrt (filter->CS[i] / filter->num_frames);
GST_LOG_OBJECT (filter,
@ -728,7 +733,7 @@ gst_level_post_message (GstLevel * filter)
/* RMS values are calculated in amplitude, so 20 * log 10 */
RMSdB = 20 * log10 (RMS + EPSILON);
/* peak values are square sums, ie. power, so 10 * log 10 */
lastdB = 10 * log10 (filter->last_peak[i] + EPSILON);
peakdB = 10 * log10 (filter->last_peak[i] + EPSILON);
decaydB = 10 * log10 (filter->decay_peak[i] + EPSILON);
if (filter->decay_peak[i] < filter->last_peak[i]) {
@ -736,21 +741,23 @@ gst_level_post_message (GstLevel * filter)
* the last peak is between decay_peak and decay_peak_base */
GST_DEBUG_OBJECT (filter,
"message: decay peak dB %f smaller than last peak dB %f, copying",
decaydB, lastdB);
decaydB, peakdB);
filter->decay_peak[i] = filter->last_peak[i];
}
GST_LOG_OBJECT (filter,
"message: RMS %f dB, peak %f dB, decay %f dB",
RMSdB, lastdB, decaydB);
RMSdB, peakdB, decaydB);
gst_level_message_append_channel (m, RMSdB, lastdB, decaydB);
gst_level_message_append_channel (m, RMSdB, peakdB, decaydB);
/* reset cumulative and normal peak */
filter->CS[i] = 0.0;
filter->last_peak[i] = 0.0;
}
gst_element_post_message (GST_ELEMENT (filter), m);
if (filter->post_messages)
gst_element_post_message (GST_ELEMENT (filter), m);
}
filter->num_frames = 0;
}

8
gst/level/gstlevel.h
View file

@ -56,13 +56,13 @@ typedef struct _GstLevelClass GstLevelClass;
struct _GstLevel {
GstBaseTransform element;
/* properties */
gboolean post_messages; /* whether or not to post messages */
guint64 interval; /* how many seconds between emits */
guint64 interval; /* how many nanoseconds between emits */
gdouble decay_peak_ttl; /* time to live for peak in nanoseconds */
gdouble decay_peak_falloff; /* falloff in dB/sec */
GstAudioInfo info;
gdouble decay_peak_ttl; /* time to live for peak in seconds */
gdouble decay_peak_falloff; /* falloff in dB/sec */
gint num_frames; /* frame count (1 sample per channel)
* since last emit */
gint interval_frames; /* after how many frame to sent a message */