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