openwrt-packages-dist/utils/lcd4linux/patches/300-jpeg8.patch

--- a/drv_SamsungSPF.c
+++ b/drv_SamsungSPF.c
@@ -43,6 +43,7 @@
 
 #include <usb.h>
 #include <jpeglib.h>
+#include <jerror.h>
 
 #include "debug.h"
 #include "cfg.h"
@@ -117,6 +118,287 @@ static struct {
 /***  hardware dependant functions    ***/
 /****************************************/
 
+/* libjpeg8 and later come with their own (API compatible) memory source
+   and dest */
+#if JPEG_LIB_VERSION < 80 && !defined(MEM_SRCDST_SUPPORTED)
+
+/* Expanded data source object for memory input */
+
+typedef struct {
+	struct jpeg_source_mgr pub; /* public fields */
+
+	JOCTET eoi_buffer[2]; /* a place to put a dummy EOI */
+} my_source_mgr;
+
+typedef my_source_mgr * my_src_ptr;
+
+
+/*
+* Initialize source --- called by jpeg_read_header
+* before any data is actually read.
+*/
+
+METHODDEF(void)
+init_source (j_decompress_ptr cinfo)
+{
+	/* No work, since jpeg_mem_src set up the buffer pointer and count.
+	* Indeed, if we want to read multiple JPEG images from one buffer,
+	* this *must* not do anything to the pointer.
+	*/
+}
+
+
+/*
+* Fill the input buffer --- called whenever buffer is emptied.
+*
+* In this application, this routine should never be called; if it is called,
+* the decompressor has overrun the end of the input buffer, implying we
+* supplied an incomplete or corrupt JPEG datastream. A simple error exit
+* might be the most appropriate response.
+*
+* But what we choose to do in this code is to supply dummy EOI markers
+* in order to force the decompressor to finish processing and supply
+* some sort of output image, no matter how corrupted.
+*/
+
+METHODDEF(boolean)
+fill_input_buffer (j_decompress_ptr cinfo)
+{
+	my_src_ptr src = (my_src_ptr) cinfo->src;
+
+	WARNMS(cinfo, JWRN_JPEG_EOF);
+
+	/* Create a fake EOI marker */
+	src->eoi_buffer[0] = (JOCTET) 0xFF;
+	src->eoi_buffer[1] = (JOCTET) JPEG_EOI;
+	src->pub.next_input_byte = src->eoi_buffer;
+	src->pub.bytes_in_buffer = 2;
+
+	return TRUE;
+}
+
+
+/*
+* Skip data --- used to skip over a potentially large amount of
+* uninteresting data (such as an APPn marker).
+*
+* If we overrun the end of the buffer, we let fill_input_buffer deal with
+* it. An extremely large skip could cause some time-wasting here, but
+* it really isn't supposed to happen ... and the decompressor will never
+* skip more than 64K anyway.
+*/
+
+METHODDEF(void)
+skip_input_data (j_decompress_ptr cinfo, long num_bytes)
+{
+	my_src_ptr src = (my_src_ptr) cinfo->src;
+
+	if (num_bytes > 0) {
+		while (num_bytes > (long) src->pub.bytes_in_buffer) {
+			num_bytes -= (long) src->pub.bytes_in_buffer;
+			(void) fill_input_buffer(cinfo);
+			/* note we assume that fill_input_buffer will never
+			* return FALSE, so suspension need not be handled.
+			*/
+		}
+		src->pub.next_input_byte += (size_t) num_bytes;
+		src->pub.bytes_in_buffer -= (size_t) num_bytes;
+	}
+}
+
+
+/*
+* An additional method that can be provided by data source modules is the
+* resync_to_restart method for error recovery in the presence of RST markers.
+* For the moment, this source module just uses the default resync method
+* provided by the JPEG library. That method assumes that no backtracking
+* is possible.
+*/
+
+
+/*
+* Terminate source --- called by jpeg_finish_decompress
+* after all data has been read. Often a no-op.
+*
+* NB: *not* called by jpeg_abort or jpeg_destroy; surrounding
+* application must deal with any cleanup that should happen even
+* for error exit.
+*/
+
+METHODDEF(void)
+term_source (j_decompress_ptr cinfo)
+{
+	/* no work necessary here */
+}
+
+
+/*
+* Prepare for input from a memory buffer.
+*/
+
+GLOBAL(void)
+jpeg_mem_src (j_decompress_ptr cinfo, unsigned char * buffer,
+	unsigned long bufsize)
+{
+	my_src_ptr src;
+
+	/* The source object is made permanent so that a series of JPEG images
+	* can be read from a single buffer by calling jpeg_mem_src
+	* only before the first one.
+	* This makes it unsafe to use this manager and a different source
+	* manager serially with the same JPEG object. Caveat programmer.
+	*/
+	if (cinfo->src == NULL) { /* first time for this JPEG object? */
+		cinfo->src = (struct jpeg_source_mgr *)
+			(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo,
+						    JPOOL_PERMANENT,
+						    sizeof(my_source_mgr));
+	}
+
+	src = (my_src_ptr) cinfo->src;
+	src->pub.init_source = init_source;
+	src->pub.fill_input_buffer = fill_input_buffer;
+	src->pub.skip_input_data = skip_input_data;
+	src->pub.resync_to_restart = jpeg_resync_to_restart; /* use default method */
+	src->pub.term_source = term_source;
+
+	src->pub.next_input_byte = buffer;
+	src->pub.bytes_in_buffer = bufsize;
+}
+
+
+
+/* Memory destination source modelled after Thomas G. Lane's memory source
+   support and jdatadst.c
+
+   Copyright (C) 2010, Hans de Goede
+
+   This code may be used under the same conditions as Thomas G. Lane's memory
+   source (see the copyright header at the top of this file).
+ */
+
+typedef struct {
+	struct jpeg_destination_mgr pub; /* public fields */
+
+	JOCTET **buffer;              /* start of buffer */
+	unsigned long buf_size, *outsize;
+} my_destination_mgr;
+
+typedef my_destination_mgr * my_dest_ptr;
+
+#define OUTPUT_BUF_SIZE 32768   /* choose an efficiently fwrite'able size */
+
+
+/*
+ * Initialize destination --- called by jpeg_start_compress
+ * before any data is actually written.
+ */
+
+METHODDEF(void)
+init_destination (j_compress_ptr cinfo)
+{
+	/* No work, since jpeg_mem_dest set up the buffer pointer and count.
+	* Indeed, if we want to write multiple JPEG images to one buffer,
+	* this *must* not do anything to the pointer.
+	*/
+}
+
+/*
+ * Empty the output buffer --- called whenever buffer fills up.
+ *
+ * In typical applications, this should write the entire output buffer
+ * (ignoring the current state of next_output_byte & free_in_buffer), 
+ * reset the pointer & count to the start of the buffer, and return TRUE
+ * indicating that the buffer has been dumped.
+ *
+ * In applications that need to be able to suspend compression due to output
+ * overrun, a FALSE return indicates that the buffer cannot be emptied now. 
+ * In this situation, the compressor will return to its caller (possibly with
+ * an indication that it has not accepted all the supplied scanlines).  The  
+ * application should resume compression after it has made more room in the  
+ * output buffer.  Note that there are substantial restrictions on the use of
+ * suspension --- see the documentation.
+ *
+ * When suspending, the compressor will back up to a convenient restart point
+ * (typically the start of the current MCU). next_output_byte & free_in_buffer
+ * indicate where the restart point will be if the current call returns FALSE.
+ * Data beyond this point will be regenerated after resumption, so do not
+ * write it out when emptying the buffer externally.
+ */
+
+METHODDEF(boolean)
+empty_output_buffer (j_compress_ptr cinfo)
+{
+	my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
+
+	*dest->buffer = realloc (*dest->buffer, dest->buf_size + OUTPUT_BUF_SIZE);
+	if (!*dest->buffer)
+		ERREXIT1(cinfo, JERR_OUT_OF_MEMORY, 0);
+
+	dest->pub.next_output_byte = *dest->buffer + dest->buf_size;
+	dest->pub.free_in_buffer = OUTPUT_BUF_SIZE;
+	dest->buf_size += OUTPUT_BUF_SIZE;
+
+	return TRUE;
+}
+
+/*
+ * Terminate destination --- called by jpeg_finish_compress   
+ * after all data has been written.  Usually needs to flush buffer.
+ *
+ * NB: *not* called by jpeg_abort or jpeg_destroy; surrounding
+ * application must deal with any cleanup that should happen even
+ * for error exit.
+ */
+
+METHODDEF(void)
+term_destination (j_compress_ptr cinfo)
+{
+	my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
+
+	*dest->outsize = dest->buf_size - dest->pub.free_in_buffer;
+}
+
+GLOBAL(void)
+jpeg_mem_dest (j_compress_ptr cinfo, unsigned char ** outbuffer,
+	unsigned long * outsize)
+{
+	my_dest_ptr dest;
+
+	/* The destination object is made permanent so that multiple JPEG images
+	 * can be written to the same file without re-executing jpeg_stdio_dest.
+	 * This makes it dangerous to use this manager and a different destination
+	 * manager serially with the same JPEG object, because their private object
+	 * sizes may be different.  Caveat programmer.
+	 */
+	if (cinfo->dest == NULL) {  /* first time for this JPEG object? */
+		cinfo->dest = (struct jpeg_destination_mgr *)
+			(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo,
+						    JPOOL_PERMANENT,
+						    sizeof(my_destination_mgr));
+	}
+
+	dest = (my_dest_ptr) cinfo->dest;
+	dest->pub.init_destination = init_destination;
+	dest->pub.empty_output_buffer = empty_output_buffer;
+	dest->pub.term_destination = term_destination;
+	dest->buffer = outbuffer;
+	dest->buf_size = *outsize;
+	dest->outsize = outsize;
+
+	if (*dest->buffer == NULL || dest->buf_size == 0) {
+		/* Allocate initial buffer */
+		*dest->buffer = malloc(OUTPUT_BUF_SIZE);
+		if (*dest->buffer == NULL)
+			ERREXIT1(cinfo, JERR_OUT_OF_MEMORY, 10);
+		dest->buf_size = OUTPUT_BUF_SIZE;
+	}
+
+	dest->pub.next_output_byte = *dest->buffer;
+	dest->pub.free_in_buffer = dest->buf_size;
+}
+
+#endif /* JPEG_LIB_VERSION < 80 && !defined(MEM_SRCDST_SUPPORTED) */
 
 /* please note that in-memory compression doesn't work satisfactory */
 int convert2JPG()