spectrum: add a GstSpecrtumChannel context structure

[platform/upstream/gst-plugins-good.git] / gst / spectrum / gstspectrum.h

diff --git a/gst/spectrum/gstspectrum.h b/gst/spectrum/gstspectrum.h
index 51e2000..7f055ec 100644 (file)
--- a/gst/spectrum/gstspectrum.h
+++ b/gst/spectrum/gstspectrum.h
@@ -1,5 +1,6 @@
 /* GStreamer
  * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * Copyright (C) <2009> Sebastian Dröge <sebastian.droege@collabora.co.uk>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ -21,60 +22,64 @@
 #ifndef __GST_SPECTRUM_H__
 #define __GST_SPECTRUM_H__
 
-
 #include <gst/gst.h>
-#include <gst/base/gstadapter.h>
-#include <gst/base/gstbasetransform.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif /* __cplusplus */
+#include <gst/audio/gstaudiofilter.h>
+#include <gst/fft/gstfftf32.h>
 
+G_BEGIN_DECLS
 
 #define GST_TYPE_SPECTRUM            (gst_spectrum_get_type())
 #define GST_SPECTRUM(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SPECTRUM,GstSpectrum))
 #define GST_IS_SPECTRUM(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SPECTRUM))
 #define GST_SPECTRUM_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_SPECTRUM,GstSpectrumClass))
 #define GST_IS_SPECTRUM_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_SPECTRUM))
-
 typedef struct _GstSpectrum GstSpectrum;
 typedef struct _GstSpectrumClass GstSpectrumClass;
+typedef struct _GstSpectrumChannel GstSpectrumChannel;
+
+struct _GstSpectrumChannel
+{
+  gfloat *input;
+  gfloat *input_tmp;
+  GstFFTF32Complex *freqdata;
+  gfloat *spect_magnitude;      /* accumulated mangitude and phase */
+  gfloat *spect_phase;          /* will be scaled by num_fft before sending */
+  GstFFTF32 *fft_ctx;
+};
 
-struct _GstSpectrum {
-  GstBaseTransform element;
-
-  GstPad *sinkpad,*srcpad;
-  GstAdapter *adapter;
+struct _GstSpectrum
+{
+  GstAudioFilter parent;
 
   /* properties */
-  gboolean message;             /* whether or not to post messages */
-  gdouble interval;             /* how many seconds between emits */
+  gboolean post_messages;       /* whether or not to post messages */
+  gboolean message_magnitude;
+  gboolean message_phase;
+  guint64 interval;             /* how many nanoseconds between emits */
+  guint64 frames_per_interval;  /* how many frames per interval */
   guint bands;                  /* number of spectrum bands */
   gint threshold;               /* energy level treshold */
 
-  gint num_frames;              /* frame count (1 sample per channel)
+  guint64 num_frames;           /* frame count (1 sample per channel)
                                  * since last emit */
-                                 
-  gint rate;                    /* caps variables */
-  gint width;
-  gint channels;
+  guint64 num_fft;              /* number of FFTs since last emit */
+  GstClockTime message_ts;      /* starttime for next message */
 
   /* <private> */
-  gint base, len;
-  gint16 *re, *im, *loud;
-  guchar *spect;
+  GstSpectrumChannel *channel_data;
+
+  guint input_pos;
+  guint64 error_per_interval;
+  guint64 accumulated_error;
 };
 
-struct _GstSpectrumClass {
-  GstBaseTransformClass parent_class;
+struct _GstSpectrumClass
+{
+  GstAudioFilterClass parent_class;
 };
 
 GType gst_spectrum_get_type (void);
 
-
-#ifdef __cplusplus
-}
-#endif /* __cplusplus */
-
+G_END_DECLS
 
 #endif /* __GST_SPECTRUM_H__ */