Add IJPG decoder.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@5030 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 192 insertions, 0 deletions

diff --git a/libmpcodecs/vd_ijpg.c b/libmpcodecs/vd_ijpg.c
new file mode 100644
index 0000000000..c6904563b0
--- /dev/null
+++ b/libmpcodecs/vd_ijpg.c
@@ -0,0 +1,192 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "config.h"
+#include "mp_msg.h"
+
+#include <jconfig.h>
+#include <jmorecfg.h>
+#include <jpeglib.h>
+#include <jpegint.h>
+#include <jerror.h>
+
+#include <setjmp.h>
+
+#include "bswap.h"
+#include "postproc/rgb2rgb.h"
+#include "libvo/fastmemcpy.h"
+
+#include "vd_internal.h"
+
+static vd_info_t info = {
+	"JPEG Images decoder",
+	"ijpg",
+	VFM_IJPG,
+	"Pontscho",
+	"based on vd_mpng.c",
+	"uses Indipended JPEG Group's jpeglib"
+};
+
+LIBVD_EXTERN(ijpg)
+
+static unsigned int out_fmt=0;
+
+static int last_w=-1;
+static int last_h=-1;
+static int last_c=-1;
+
+// to set/get/query special features/parameters
+static int control(sh_video_t *sh,int cmd,void* arg,...){
+    return CONTROL_UNKNOWN;
+}
+
+// init driver
+static int init(sh_video_t *sh){
+    last_w=-1;
+    return 1;
+}
+
+// uninit driver
+static void uninit(sh_video_t *sh){
+}
+
+//mp_image_t* mpcodecs_get_image(sh_video_t *sh, int mp_imgtype, int mp_imgflag, int w, int h);
+
+typedef struct
+{
+ struct          jpeg_source_mgr pub;
+ unsigned char * inbuf;
+ int             bufsize;
+} my_source_mgr;
+
+typedef my_source_mgr * my_src_ptr;
+
+METHODDEF(void) init_source (j_decompress_ptr cinfo)
+{
+}
+
+METHODDEF(boolean) fill_input_buffer (j_decompress_ptr cinfo)
+{
+ my_src_ptr src = (my_src_ptr) cinfo->src;                                                         
+ size_t nbytes;                                                                                    
+ src->pub.next_input_byte = src->inbuf;
+ src->pub.bytes_in_buffer = src->bufsize;
+ return TRUE;
+}
+                                                                                                        
+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);
+    }
+   src->pub.next_input_byte += (size_t) num_bytes;
+   src->pub.bytes_in_buffer -= (size_t) num_bytes;
+  }
+}
+
+METHODDEF(void) term_source (j_decompress_ptr cinfo) { }                                           
+						   
+GLOBAL(void) jpeg_buf_src ( j_decompress_ptr cinfo, char * inbuf,int bufsize )                     
+{
+ my_src_ptr src;
+ if (cinfo->src == NULL) cinfo->src=malloc( 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;
+ src->pub.term_source = term_source;
+ src->inbuf = inbuf;
+ src->bufsize=bufsize;
+ src->pub.bytes_in_buffer = 0;
+ src->pub.next_input_byte = NULL;
+}
+
+struct my_error_mgr
+{
+ struct jpeg_error_mgr pub;
+ jmp_buf setjmp_buffer;
+};
+
+typedef struct my_error_mgr * my_error_ptr;
+
+METHODDEF(void) my_error_exit (j_common_ptr cinfo)
+{
+ my_error_ptr myerr=(my_error_ptr) cinfo->err;
+ (*cinfo->err->output_message) (cinfo);
+ longjmp(myerr->setjmp_buffer, 1);
+}
+
+static struct     jpeg_decompress_struct cinfo;
+static struct     my_error_mgr jerr;
+static int        row_stride;
+static int 	  count;
+				  
+// decode a frame
+static mp_image_t* decode(sh_video_t *sh,void* data,int len,int flags){
+ mp_image_t * mpi = NULL;
+ int	      width,height,depth,i,j;
+
+ if ( len <= 0 ) return NULL; // skipped frame
+
+ cinfo.err=jpeg_std_error( &jerr.pub );
+ jerr.pub.error_exit=my_error_exit;
+ if( setjmp( jerr.setjmp_buffer ) )
+  {
+   mp_msg( MSGT_DECVIDEO,MSGL_ERR,"[ijpg] setjmp error ...\n" );
+   return NULL;
+  }
+  
+ jpeg_create_decompress( &cinfo );
+ jpeg_buf_src( &cinfo,data,len );
+ jpeg_read_header( &cinfo,TRUE );
+ width=cinfo.image_width;
+ height=cinfo.image_height;
+ jpeg_start_decompress( &cinfo );
+ depth=cinfo.output_components * 8;
+
+ switch( depth ) {
+   case 8:  out_fmt=IMGFMT_BGR8;  break;
+   case 24: out_fmt=IMGFMT_BGR24; break;
+   default: mp_msg( MSGT_DECVIDEO,MSGL_ERR,"Sorry, unsupported JPEG colorspace: %d.\n",depth ); return NULL;
+ }
+
+ if ( last_w!=width || last_h!=height || last_c!=out_fmt )
+  {
+   last_w=width; last_h=height; last_c=out_fmt;
+   if ( !out_fmt ) return NULL;
+   mpcodecs_config_vo( sh,width,height,out_fmt );
+  }
+
+ mpi=mpcodecs_get_image( sh,MP_IMGTYPE_TEMP,MP_IMGFLAG_ACCEPT_STRIDE,width,height );
+ if ( !mpi ) return NULL;
+
+ row_stride=cinfo.output_width * cinfo.output_components;
+
+ for ( i=0;i < height;i++ )
+  {
+   char * row = mpi->planes[0] + mpi->stride[0] * i;
+   jpeg_read_scanlines( &cinfo,&row,1 );
+#warning workaround for rgb2bgr
+   if ( depth == 24 )
+    for ( j=0;j < width * 3;j+=3 )
+     {
+      char c;
+      c=row[j];
+      row[j]=row[j+2];
+      row[j+2]=c;
+     }
+  }
+  
+ jpeg_finish_decompress(&cinfo);                                                                   
+ jpeg_destroy_decompress(&cinfo);                                                                  
+	    
+ return mpi;
+}