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-rw-r--r--tools.c96
1 files changed, 95 insertions, 1 deletions
diff --git a/tools.c b/tools.c
index 5937d857..1f474c8b 100644
--- a/tools.c
+++ b/tools.c
@@ -4,13 +4,20 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
- * $Id: tools.c 1.105 2005/12/18 10:33:04 kls Exp $
+ * $Id: tools.c 1.106 2005/12/29 11:20:28 kls Exp $
*/
#include "tools.h"
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
+extern "C" {
+#ifdef boolean
+#define HAVE_BOOLEAN
+#endif
+#include <jpeglib.h>
+#undef boolean
+}
#include <stdarg.h>
#include <stdlib.h>
#include <sys/time.h>
@@ -651,6 +658,93 @@ cString TimeString(time_t t)
return buf;
}
+// --- RgbToJpeg -------------------------------------------------------------
+
+#define JPEGCOMPRESSMEM 500000
+
+struct tJpegCompressData {
+ int size;
+ uchar *mem;
+ };
+
+static void JpegCompressInitDestination(j_compress_ptr cinfo)
+{
+ tJpegCompressData *jcd = (tJpegCompressData *)cinfo->client_data;
+ if (jcd) {
+ cinfo->dest->free_in_buffer = jcd->size = JPEGCOMPRESSMEM;
+ cinfo->dest->next_output_byte = jcd->mem = MALLOC(uchar, jcd->size);
+ }
+}
+
+static boolean JpegCompressEmptyOutputBuffer(j_compress_ptr cinfo)
+{
+ tJpegCompressData *jcd = (tJpegCompressData *)cinfo->client_data;
+ if (jcd) {
+ int Used = jcd->size;
+ jcd->size += JPEGCOMPRESSMEM;
+ jcd->mem = (uchar *)realloc(jcd->mem, jcd->size);
+ if (jcd->mem) {
+ cinfo->dest->next_output_byte = jcd->mem + Used;
+ cinfo->dest->free_in_buffer = jcd->size - Used;
+ return TRUE;
+ }
+ }
+ return FALSE;
+}
+
+static void JpegCompressTermDestination(j_compress_ptr cinfo)
+{
+ tJpegCompressData *jcd = (tJpegCompressData *)cinfo->client_data;
+ if (jcd) {
+ int Used = cinfo->dest->next_output_byte - jcd->mem;
+ if (Used < jcd->size) {
+ jcd->size = Used;
+ jcd->mem = (uchar *)realloc(jcd->mem, jcd->size);
+ }
+ }
+}
+
+uchar *RgbToJpeg(uchar *Mem, int Width, int Height, int &Size, int Quality)
+{
+ if (Quality < 0)
+ Quality = 0;
+ else if (Quality > 100)
+ Quality = 100;
+
+ jpeg_destination_mgr jdm;
+
+ jdm.init_destination = JpegCompressInitDestination;
+ jdm.empty_output_buffer = JpegCompressEmptyOutputBuffer;
+ jdm.term_destination = JpegCompressTermDestination;
+
+ struct jpeg_compress_struct cinfo;
+ struct jpeg_error_mgr jerr;
+ cinfo.err = jpeg_std_error(&jerr);
+ jpeg_create_compress(&cinfo);
+ cinfo.dest = &jdm;
+ tJpegCompressData jcd;
+ cinfo.client_data = &jcd;
+ cinfo.image_width = Width;
+ cinfo.image_height = Height;
+ cinfo.input_components = 3;
+ cinfo.in_color_space = JCS_RGB;
+
+ jpeg_set_defaults(&cinfo);
+ jpeg_set_quality(&cinfo, Quality, true);
+ jpeg_start_compress(&cinfo, true);
+
+ int rs = Width * 3;
+ JSAMPROW rp[Height];
+ for (int k = 0; k < Height; k++)
+ rp[k] = &Mem[rs * k];
+ jpeg_write_scanlines(&cinfo, rp, Height);
+ jpeg_finish_compress(&cinfo);
+ jpeg_destroy_compress(&cinfo);
+
+ Size = jcd.size;
+ return jcd.mem;
+}
+
// --- cReadLine -------------------------------------------------------------
cReadLine::cReadLine(void)