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