Plugin JPEG decoder for data in memory, along with test_mem_jpeg.c and bench_mem_jpeg.c plugins to test and benchmark it, and a line-length clean up in jpeg_load.c.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20871 a1c6a512-1295-4272-9138-f99709370657
2009-05-08 03:46:48 +00:00 · 2009-05-08 03:46:48 +00:00 · a75c72c169
commit a75c72c169
parent c91e73e922
7 changed files with 435 additions and 14 deletions
--- a/apps/plugins/bench_mem_jpeg.c
+++ b/apps/plugins/bench_mem_jpeg.c
@ -0,0 +1,150 @@
+/*****************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _// __ \_/ ___\|  |/ /| __ \ / __ \  \/  /
+ *   Jukebox    |    |   ( (__) )  \___|    ( | \_\ ( (__) )    (
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2009 Andrew Mahone
+ *
+ * In-memory JPEG decode benchmark.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include "plugin.h"
+#include "lib/jpeg_mem.h"
+PLUGIN_HEADER
+
+/* a null output plugin to save memory and better isolate decode cost */
+static unsigned int get_size_null(struct bitmap *bm)
+{
+    (void) bm;
+    return 1;
+}
+
+static void output_row_null(uint32_t row, void * row_in,
+                            struct scaler_context *ctx)
+{
+    (void) row;
+    (void) row_in;
+    (void) ctx;
+    return;
+}
+
+const struct custom_format format_null = {
+#ifdef HAVE_LCD_COLOR
+    .output_row = {
+        output_row_null,
+        output_row_null
+    },
+#else
+    .output_row = output_row_null,
+#endif
+    .get_size = get_size_null
+};
+
+static char output_buf[256];
+static int output_y = 0;
+static int font_h;
+
+#define lcd_printf(...) \
+do { \
+    rb->snprintf(output_buf, sizeof(output_buf), __VA_ARGS__); \
+    rb->lcd_putsxy(0, output_y, output_buf); \
+    rb->lcd_update_rect(0, output_y, LCD_WIDTH, font_h); \
+    output_y += font_h; \
+} while (0)
+
+/* this is the plugin entry point */
+enum plugin_status plugin_start(const void* parameter)
+{
+    size_t plugin_buf_len;
+    unsigned char * plugin_buf =
+        (unsigned char *)rb->plugin_get_buffer(&plugin_buf_len);
+    static char filename[MAX_PATH];
+    struct bitmap bm = {
+        .width = LCD_WIDTH,
+        .height = LCD_HEIGHT,
+    };
+    int ret;
+
+    if(!parameter) return PLUGIN_ERROR;
+
+    rb->strcpy(filename, parameter);
+    rb->lcd_set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
+    rb->lcd_fillrect(0, 0, LCD_WIDTH, LCD_HEIGHT);
+    rb->lcd_set_drawmode(DRMODE_SOLID);
+    rb->lcd_getstringsize("A", NULL, &font_h);
+    int fd = rb->open(filename, O_RDONLY);
+    if (fd < 0)
+    {
+        lcd_printf("file open failed: %d", fd);
+        goto wait;
+    }
+    unsigned long filesize = rb->filesize(fd);
+    if (filesize > plugin_buf_len)
+    {
+        lcd_printf("file too large");
+        goto wait;
+    }
+    plugin_buf_len -= filesize;
+    unsigned char *jpeg_buf = plugin_buf;
+    plugin_buf += filesize;
+    rb->read(fd, jpeg_buf, filesize);
+    rb->close(fd);
+    bm.data = plugin_buf;
+    struct dim jpeg_size;
+    get_jpeg_dim_mem(jpeg_buf, filesize, &jpeg_size);
+    lcd_printf("jpeg file size: %dx%d",jpeg_size.width, jpeg_size.height);
+    bm.width = jpeg_size.width;
+    bm.height = jpeg_size.height;
+    char *size_str[] = { "1/1", "1/2", "1/4", "1/8" };
+    int i;
+    for (i = 0; i < 4; i++)
+    {
+        lcd_printf("timing %s decode", size_str[i]);
+        ret = decode_jpeg_mem(jpeg_buf, filesize, &bm, plugin_buf_len,
+                            FORMAT_NATIVE|FORMAT_RESIZE|FORMAT_KEEP_ASPECT,
+                            &format_null);
+        if (ret == 1)
+        {
+            long t1, t2;
+            int count = 0;
+            t2 = *(rb->current_tick);
+            while (t2 != (t1 = *(rb->current_tick)));
+            do {
+                decode_jpeg_mem(jpeg_buf, filesize, &bm, plugin_buf_len,
+                                FORMAT_NATIVE|FORMAT_RESIZE|FORMAT_KEEP_ASPECT,
+                                &format_null);
+                count++;
+                t2 = *(rb->current_tick);
+            } while (t2 - t1 < HZ || count < 10);
+            t2 -= t1;
+            t2 *= 10;
+            t2 += count >> 1;
+            t2 /= count;
+            t1 = t2 / 1000;
+            t2 -= t1 * 1000;
+            lcd_printf("%01d.%03d secs/decode", (int)t1, (int)t2);
+            bm.width >>= 1;
+            bm.height >>= 1;
+            if (!(bm.width && bm.height))
+                break;
+        } else
+            lcd_printf("insufficient memory");
+    }
+
+wait:
+    while (rb->get_action(CONTEXT_STD,1) != ACTION_STD_OK) rb->yield();
+    return PLUGIN_OK;
+}