Initial community commit

Src/jpeg/amg.cpp

@@ -0,0 +1,121 @@
+#include "amg.h"
+#include "api__jpeg.h"
+#include <setjmp.h>
+extern "C"
+{
+#undef FAR
+#include "jpeglib.h"
+// our reader...
+
+	static void init_source( j_decompress_ptr cinfo )
+	{}
+	static const JOCTET jpeg_eof[] = { (JOCTET)0xFF, (JOCTET)JPEG_EOI };
+	static boolean fill_input_buffer( j_decompress_ptr cinfo )
+	{
+		cinfo->src->next_input_byte = jpeg_eof;
+		cinfo->src->bytes_in_buffer = 2;
+		return TRUE;
+	}
+	static void skip_input_data( j_decompress_ptr cinfo, long num_bytes )
+	{
+		//my_src_ptr src = (my_src_ptr) cinfo->src;
+		if ( num_bytes > 0 )
+		{
+			if ( num_bytes > (long)cinfo->src->bytes_in_buffer )
+			{
+				fill_input_buffer( cinfo );
+			}
+			else
+			{
+				cinfo->src->next_input_byte += (size_t)num_bytes;
+				cinfo->src->bytes_in_buffer -= (size_t)num_bytes;
+			}
+		}
+	}
+	static void term_source( j_decompress_ptr cinfo )
+	{}
+
+
+	typedef struct
+	{
+		jpeg_destination_mgr pub;
+		uint8_t *buf;
+		int len;
+	} my_destination_mgr;
+
+	void init_destination( j_compress_ptr cinfo );
+	boolean empty_output_buffer( j_compress_ptr cinfo );
+	void term_destination( j_compress_ptr cinfo );
+	static void wasabi_jpgload_error_exit( j_common_ptr cinfo )
+	{
+		jmp_buf *stack_env = (jmp_buf *)cinfo->client_data;
+		longjmp( *stack_env, 1 );
+	}
+};
+
+
+
+int AMGSucks::WriteAlbumArt(const void *data, size_t data_len, void **out, int *out_len)
+{
+	*out = 0;
+	jmp_buf stack_env;
+
+	jpeg_decompress_struct cinfo_dec={0};
+	jpeg_compress_struct cinfo={0};
+	cinfo.client_data=&stack_env;
+	cinfo_dec.client_data=&stack_env;
+
+	if (setjmp(stack_env))
+	{
+		// longjmp will goto here
+		jpeg_destroy_decompress(&cinfo_dec);
+		jpeg_destroy_compress(&cinfo);
+		return 1;
+	}
+
+	jpeg_error_mgr jerr;
+	jpeg_source_mgr src = {(const JOCTET *)data,data_len,init_source,fill_input_buffer,skip_input_data,jpeg_resync_to_restart,term_source};
+	cinfo_dec.err = jpeg_std_error(&jerr);
+	jpeg_create_decompress(&cinfo_dec);
+	cinfo_dec.err->error_exit = wasabi_jpgload_error_exit;
+	cinfo_dec.src = &src;
+
+	if (jpeg_read_header(&cinfo_dec, TRUE) == JPEG_HEADER_OK)
+	{
+		cinfo.err = cinfo_dec.err;
+		jpeg_create_compress(&cinfo);
+		cinfo.err->error_exit = wasabi_jpgload_error_exit;
+
+		my_destination_mgr dest = {{0,65536,init_destination,empty_output_buffer,term_destination},0,65536};
+		dest.buf = (uint8_t *)WASABI_API_MEMMGR->sysMalloc(65536);
+		dest.pub.next_output_byte = dest.buf;
+		cinfo.dest = (jpeg_destination_mgr*)&dest;
+		cinfo.image_width = cinfo_dec.image_width;
+		cinfo.image_height = cinfo_dec.image_height;
+		cinfo.input_components = 4;
+		cinfo.in_color_space = JCS_RGB;
+
+		jpeg_copy_critical_parameters(&cinfo_dec, &cinfo);
+		jvirt_barray_ptr *stuff = jpeg_read_coefficients(&cinfo_dec);
+		jpeg_write_coefficients(&cinfo, stuff);
+		const char *blah = "AMG/AOL";
+		jpeg_write_marker(&cinfo, JPEG_COM, (JOCTET *)blah, (unsigned int)strlen(blah));
+
+		jpeg_finish_compress(&cinfo);
+
+		*out = dest.buf;
+		*out_len = dest.len - (int)dest.pub.free_in_buffer;
+
+		jpeg_destroy_decompress(&cinfo_dec);
+		jpeg_destroy_compress(&cinfo);
+
+		return 0;
+	}
+	return 1;
+}
+
+#define CBCLASS AMGSucks
+START_DISPATCH;
+CB(WRITEALBUMART, WriteAlbumArt);
+END_DISPATCH;
+#undef CBCLASS