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100 lines
2.8 KiB
100 lines
2.8 KiB
--- a/src/plugins/jpeg_extractor.c
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+++ b/src/plugins/jpeg_extractor.c
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@@ -31,8 +31,97 @@ typedef int boolean;
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#define HAVE_BOOLEAN
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#endif
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#include <jpeglib.h>
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+#include <jerror.h>
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#include <setjmp.h>
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+#if JPEG_LIB_VERSION < 80 && !defined(MEM_SRCDST_SUPPORTED)
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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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+static 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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+static 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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+static 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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+static 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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+static 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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+#endif
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/**
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* Context for custom functions.
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