the video player plugin and file the type / plugin API for it

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4145 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 198 insertions, 0 deletions

diff --git a/apps/plugins/video.c b/apps/plugins/video.c
new file mode 100644
index 0000000..396d515
--- /dev/null
+++ b/apps/plugins/video.c
@@ -0,0 +1,198 @@
+/***************************************************************************
+*             __________               __   ___.
+*   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+*   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+*   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+*   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+*                     \/            \/     \/    \/            \/
+* $Id$
+*
+* Experimental plugin for halftoning
+* Reads raw image data from a file
+*
+* Copyright (C) 2003 Jörg Hohensohn [IDC]Dragon
+*
+* All files in this archive are subject to the GNU General Public License.
+* See the file COPYING in the source tree root for full license agreement.
+*
+* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+* KIND, either express or implied.
+*
+****************************************************************************/
+#ifdef HAVE_LCD_BITMAP
+
+#include "plugin.h"
+#include "system.h"
+
+#define DEFAULT_FILENAME "/default.rvf"
+#define SCREENSIZE (LCD_WIDTH*LCD_HEIGHT/8) /* in bytes */
+#define FILEBUFSIZE SCREENSIZE*4 /* must result in a multiple of 512 */
+
+static struct plugin_api* rb; /* here is a global api struct pointer */
+
+int WaitForButton(void)
+{
+    int button;
+    
+    do
+    {
+        button = rb->button_get(true);
+    } while ((button & BUTTON_REL) && button != SYS_USB_CONNECTED);
+    
+    return button;
+}
+
+
+/* play from memory, loop until OFF is pressed */
+int show_buffer(unsigned char* p_start, int frames)
+{
+    unsigned char* p_current = p_start;
+    unsigned char* p_end = p_start + SCREENSIZE * frames;
+    int shown = 0;
+    int button;
+
+    do
+    {
+        rb->lcd_blit(p_current, 0, 0, LCD_WIDTH, LCD_HEIGHT/8, LCD_WIDTH);
+        p_current += SCREENSIZE;
+        if (p_current >= p_end)
+            p_current = p_start; /* wrap */
+
+        rb->yield(); /* yield to the other treads */
+        shown++;
+
+        button = rb->button_get(false);
+    } while(button != BUTTON_OFF && button != SYS_USB_CONNECTED);
+
+    return (button != SYS_USB_CONNECTED) ? shown : SYS_USB_CONNECTED;
+}
+
+
+/* play from file, exit if OFF is pressed */
+int show_file(unsigned char* p_buffer, int fd)
+{
+    int got_now; /* how many gotten for this frame */
+    int shown = 0;
+    int button = BUTTON_NONE;
+    /* tricky buffer handling to read only whole sectors, then no copying needed */
+    unsigned char* p_file = p_buffer; /* file read */
+    unsigned char* p_screen = p_buffer; /* display */
+    unsigned char* p_end = p_buffer + FILEBUFSIZE; /* for wraparound test */
+    int needed; /* read how much data to complete a frame */
+    int read_now; /* size to read for this frame, 512 or 1024 */
+
+    do
+    {
+        needed = SCREENSIZE - (p_file - p_screen); /* minus what we have */
+        read_now = (needed + (SECTOR_SIZE-1)) & ~(SECTOR_SIZE-1); /* round up to whole sectors */
+
+        got_now = rb->read(fd, p_file, read_now); /* read the sector(s) */
+        rb->lcd_blit(p_screen, 0, 0, LCD_WIDTH, LCD_HEIGHT/8, LCD_WIDTH);
+
+        p_screen += SCREENSIZE;
+        if (p_screen >= p_end)
+            p_screen = p_buffer; /* wrap */
+
+        p_file += got_now;
+        if (p_file >= p_end)
+            p_file = p_buffer; /* wrap */
+
+        if (read_now < SCREENSIZE) /* below average? time to do something else */
+        {
+            rb->yield(); /* yield to the other treads */
+            button = rb->button_get(false);
+        }
+
+        shown++;
+
+    } while (got_now >= needed 
+          && button != BUTTON_OFF 
+          && button != SYS_USB_CONNECTED);
+
+    return (button != SYS_USB_CONNECTED) ? shown : SYS_USB_CONNECTED;
+}
+
+
+int main(char* filename)
+{
+    char buf[32];
+    int buffer_size, file_size;
+    unsigned char* p_buffer;
+    int fd; /* file descriptor handle */
+    int got_now; /* how many bytes read from file */
+    int frames, shown;
+    long time;
+    int button;
+
+    p_buffer = rb->plugin_get_buffer(&buffer_size);
+    if (buffer_size < FILEBUFSIZE)
+        return PLUGIN_ERROR; /* not enough memory */
+    
+    /* compose filename if none given */
+    if (filename == NULL)
+    {
+        filename = DEFAULT_FILENAME;
+    }
+
+    fd = rb->open(filename, O_RDONLY);
+    if (fd < 0)
+        return PLUGIN_ERROR;
+
+    file_size =  rb->filesize(fd);
+    if (file_size <= buffer_size)
+    {   /* we can read the whole file in advance */
+        got_now = rb->read(fd, p_buffer, file_size);
+        rb->close(fd);
+        frames = got_now / (LCD_WIDTH*LCD_HEIGHT/8);
+        time = *rb->current_tick;
+        shown = show_buffer(p_buffer, frames);
+        time = *rb->current_tick - time;
+    }
+    else
+    {   /* we need to stream */
+        time = *rb->current_tick;
+        shown = show_file(p_buffer, fd);
+        time = *rb->current_tick - time;
+        rb->close(fd);
+    }
+
+    rb->close(fd);
+    and_b(~0x40, &PBDRL); /* hack workaround to get the LED off */
+
+    if (shown == SYS_USB_CONNECTED) /* exception */
+        return PLUGIN_USB_CONNECTED;
+
+    rb->lcd_clear_display();
+    rb->snprintf(buf, sizeof(buf), "%d frames", shown);
+    rb->lcd_puts(0, 0, buf);
+    rb->snprintf(buf, sizeof(buf), "%d.%02d seconds", time/HZ, time%HZ);
+    rb->lcd_puts(0, 1, buf);
+    rb->snprintf(buf, sizeof(buf), "%d fps", (shown * HZ + time/2) / time);
+    rb->lcd_puts(0, 2, buf);
+    rb->snprintf(buf, sizeof(buf), "file: %d bytes", file_size);
+    rb->lcd_puts(0, 6, buf);
+    rb->snprintf(buf, sizeof(buf), "buffer: %d bytes", buffer_size);
+    rb->lcd_puts(0, 7, buf);
+    rb->lcd_update();
+    button = WaitForButton();
+    return (button == SYS_USB_CONNECTED) ? PLUGIN_USB_CONNECTED : PLUGIN_OK;
+
+}
+
+
+/***************** Plugin Entry Point *****************/
+
+enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
+{
+    /* this macro should be called as the first thing you do in the plugin.
+    it test that the api version and model the plugin was compiled for
+    matches the machine it is running on */
+    TEST_PLUGIN_API(api);
+    
+    rb = api; /* copy to global api pointer */
+    
+    /* now go ahead and have fun! */
+    return main((char*) parameter);
+}
+
+#endif // #ifdef HAVE_LCD_BITMAP
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