From 57dbb72f4c1ccd93baf79dfb0f373a2cf4d690ae Mon Sep 17 00:00:00 2001
From: yomguy <>
Date: Sun, 27 May 2007 22:18:37 +0000
Subject: [PATCH] Tuned max sample lengths to reasonable values

---
 telemeta/visualization/octave/spectrogram2img.m | 13 ++++++++-----
 telemeta/visualization/spectrogram2.py          |  2 +-
 telemeta/visualization/waveform2.py             |  2 +-
 3 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/telemeta/visualization/octave/spectrogram2img.m b/telemeta/visualization/octave/spectrogram2img.m
index 9294bae1..52a1e1f4 100644
--- a/telemeta/visualization/octave/spectrogram2img.m
+++ b/telemeta/visualization/octave/spectrogram2img.m
@@ -27,15 +27,18 @@ step = 6;   % spectral slice period (ms)
 % step_length = fix(5*Fs/1000);
 window = 30;   % filter window (ms)
 % window = fix(40*Fs/1000);
-lim_x_length = 10; % (s)
+time_limit = 30; % length limit of the displayed sample (s)
 
 [x, Fs] = wavread(wav_file);
 x = x(:,1);  % mono
-lim_x_samples = Fs.*lim_x_length;
-if length(x) > lim_x_samples;
- x = x(1:lim_x_samples);
-end
+lx = length(x);
 
+% LIMITING time
+lx_lim = Fs.*time_limit;
+if lx > lx_lim;
+ x = x(1:lx_lim);
+end
+    
 %fftn = 2^nextpow2(window); % next highest power of 2
 [S, f, t] = spectrogram(x, Fs, window, step, 4000, 'hanning', -30);
 S = flipud(20*log10(S));
diff --git a/telemeta/visualization/spectrogram2.py b/telemeta/visualization/spectrogram2.py
index 6afe0b40..574aad0c 100644
--- a/telemeta/visualization/spectrogram2.py
+++ b/telemeta/visualization/spectrogram2.py
@@ -26,7 +26,7 @@ class SpectrogramVisualizer2(OctaveCoreVisualizer):
         return "spectrogram2"
 
     def get_name(self):
-        return "Spectrogram2"
+        return "Spectrogram2 (< 300s)"
     
     def render(self, media_item, options=None):
         """Generator that streams the spectral view as a PNG image"""
diff --git a/telemeta/visualization/waveform2.py b/telemeta/visualization/waveform2.py
index 30ee273b..f9c8248c 100644
--- a/telemeta/visualization/waveform2.py
+++ b/telemeta/visualization/waveform2.py
@@ -26,7 +26,7 @@ class WaveformVisualizer2(OctaveCoreVisualizer):
         return "waveform2"
 
     def get_name(self):
-        return "Waveform2"
+        return "Waveform2 (< 30s)"
     
     def render(self, media_item, options=None):
         """Generator that streams the temporal view as a PNG image"""
-- 
2.39.5