lcd4linux: fix samsung driver compilation

Turns out, it uses an API that is not provided by libjpeg.

Add compatibility code from v4l-utils.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

utils/lcd4linux/Makefile

@@ -8,7 +8,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=lcd4linux
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://github.com/feckert/lcd4linux

utils/lcd4linux/patches/300-jpeg8.patch

@@ -0,0 +1,298 @@
+--- 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()