Add a true waveform display to the oscilloscope plugin.

* Adds some additional niftyness like a floating popup display that
is implemented in an OSD library for use by other plugins.

* Speed changes are now gradual for both views and follow a curve
derived from some fiddling around to get a nice feel.

* Refined a few behavioral things overall.

It needs a bit of help from a direct PCM channel callback so it may
capture PCM for waveform display. Also need a few other core routines
to help out for the OSD.

Messes with some keymaps. Some targets need keymaps to access the
different views. Some devices can't support the additional view
because it requires a large buffer ( > 1 s) for samples.

If the plugin buffer is small, they can still use the popup display
since the plugin is also much smaller in that case.

Slow speed waveform needs some refining so it draws gradually like
a real oscilloscope but I'll stick with what it is, for the moment.

Change-Id: Ieb5b7922a2238264e9b19a58cb437739194eb036
Reviewed-on: http://gerrit.rockbox.org/245
Reviewed-by: Michael Sevakis <jethead71@rockbox.org>
Tested-by: Michael Sevakis <jethead71@rockbox.org>

1 files changed, 14 insertions, 1 deletions

diff --git a/apps/plugin.h b/apps/plugin.h
index bb2778164b..b8ed7a9084 100644
--- a/apps/plugin.h
+++ b/apps/plugin.h
@@ -155,7 +155,7 @@ void* plugin_get_buffer(size_t *buffer_size);
 #define PLUGIN_MAGIC 0x526F634B /* RocK */
 
 /* increase this every time the api struct changes */
-#define PLUGIN_API_VERSION 220
+#define PLUGIN_API_VERSION 221
 
 /* update this to latest version if a change to the api struct breaks
    backwards compatibility (and please take the opportunity to sort in any
@@ -960,6 +960,19 @@ struct plugin_api {
 
     /* new stuff at the end, sort into place next time
        the API gets incompatible */
+
+#ifdef HAVE_LCD_BITMAP
+#if CONFIG_CODEC == SWCODEC
+    void (*mixer_channel_set_buffer_hook)(enum pcm_mixer_channel channel,
+                                          chan_buffer_hook_fn_type fn);
+#endif
+    void (*lcd_set_viewport)(struct viewport* vp);
+    void (*viewport_set_fullscreen)(struct viewport *vp,
+                                    const enum screen_type screen);
+    void (*lcd_set_framebuffer)(fb_data *fb);
+    void (*lcd_bmp_part)(const struct bitmap *bm, int src_x, int src_y,
+                         int x, int y, int width, int height);
+#endif
 };
 
 /* plugin header */