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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>
lilik-openwrt-22.03
Rosen Penev 4 years ago
parent
commit
b2a41075e7
No known key found for this signature in database GPG Key ID: 36D31CFA845F0E3B
2 changed files with 299 additions and 1 deletions
  1. +1
    -1
      utils/lcd4linux/Makefile
  2. +298
    -0
      utils/lcd4linux/patches/300-jpeg8.patch

+ 1
- 1
utils/lcd4linux/Makefile View File

@ -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


+ 298
- 0
utils/lcd4linux/patches/300-jpeg8.patch View File

@ -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()

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