add GCSW support

git-svn-id: https://vgmstream.svn.sourceforge.net/svnroot/vgmstream@65 51a99a44-fe44-0410-b1ba-c3e57ba2b86b

src/Makefile

@@ -23,7 +23,8 @@ META_OBJS=meta/adx_header.o \
 		  meta/rsf.o \
 		  meta/rs03.o \
 		  meta/ngc_dsp_std.o \
-		  meta/Cstr.o
+		  meta/Cstr.o \
+		  meta/gcsw.o
 
 OBJECTS=vgmstream.o streamfile.o util.o $(CODING_OBJS) $(LAYOUT_OBJS) $(META_OBJS)
 

src/meta/gcsw.c

@@ -0,0 +1,73 @@
+#include "gcsw.h"
+#include "../util.h"
+
+VGMSTREAM * init_vgmstream_gcsw(const char * const filename) {
+    VGMSTREAM * vgmstream = NULL;
+    STREAMFILE * infile = NULL;
+
+    coding_t coding_type;
+
+    int channel_count;
+    int loop_flag;
+
+    size_t max_block;
+
+    /* check extension, case insensitive */
+    if (strcasecmp("gcw",filename_extension(filename))) goto fail;
+
+    /* try to open the file for header reading */
+    infile = open_streamfile(filename);
+    if (!infile) goto fail;
+
+   /* check header */
+    if ((uint32_t)read_32bitBE(0,infile)!=0x47435357) /* "GCSW" */
+        goto fail;
+
+    /* check type details */
+    /* guess */
+    loop_flag = read_32bitBE(0x1c,infile);
+    channel_count = read_32bitBE(0xc,infile);
+
+    /* build the VGMSTREAM */
+
+    vgmstream = allocate_vgmstream(channel_count,loop_flag);
+    if (!vgmstream) goto fail;
+
+    /* fill in the vital statistics */
+    vgmstream->num_samples = read_32bitBE(0x10,infile);
+    vgmstream->sample_rate = read_32bitBE(0x8,infile);
+    /* channels and loop flag are set by allocate_vgmstream */
+    vgmstream->loop_start_sample = read_32bitBE(0x14,infile);
+    vgmstream->loop_end_sample = read_32bitBE(0x18,infile);
+
+    vgmstream->coding_type = coding_PCM16BE;
+    vgmstream->layout_type = layout_interleave;
+    vgmstream->meta_type = meta_GCSW;
+
+    vgmstream->interleave_block_size = 0x8000;
+
+    close_streamfile(infile); infile=NULL;
+
+    /* open the file for reading by each channel */
+    {
+        int i;
+        for (i=0;i<channel_count;i++) {
+            vgmstream->ch[i].streamfile = open_streamfile_buffer(filename,0x8000
+                    );
+
+            if (!vgmstream->ch[i].streamfile) goto fail;
+
+            vgmstream->ch[i].channel_start_offset=
+                vgmstream->ch[i].offset=
+                0x20+0x8000*i;
+        }
+    }
+
+    return vgmstream;
+
+    /* clean up anything we may have opened */
+fail:
+    if (infile) close_streamfile(infile);
+    if (vgmstream) close_vgmstream(vgmstream);
+    return NULL;
+}

src/meta/gcsw.h

@@ -0,0 +1,8 @@
+#include "../vgmstream.h"
+
+#ifndef _GCSW_H
+#define _GCSW_H
+
+VGMSTREAM * init_vgmstream_gcsw(const char * const filename);
+
+#endif

src/vgmstream.c

@@ -14,6 +14,7 @@
 #include "meta/rs03.h"
 #include "meta/ngc_dsp_std.h"
 #include "meta/Cstr.h"
+#include "meta/gcsw.h"
 #include "layout/interleave.h"
 #include "layout/nolayout.h"
 #include "layout/blocked.h"
@@ -29,7 +30,7 @@
  * List of functions that will recognize files. These should correspond pretty
  * directly to the metadata types
  */
-#define INIT_VGMSTREAM_FCNS 12
+#define INIT_VGMSTREAM_FCNS 13
 VGMSTREAM * (*init_vgmstream_fcns[INIT_VGMSTREAM_FCNS])(const char * const) = {
     init_vgmstream_adx,
     init_vgmstream_brstm,
@@ -43,6 +44,7 @@ VGMSTREAM * (*init_vgmstream_fcns[INIT_VGMSTREAM_FCNS])(const char * const) = {
     init_vgmstream_rs03,
     init_vgmstream_ngc_dsp_std,
     init_vgmstream_Cstr,
+    init_vgmstream_gcsw,
 };
 
 
@@ -93,6 +95,8 @@ VGMSTREAM * allocate_vgmstream(int channel_count, int looped) {
     VGMSTREAMCHANNEL * start_channels;
     VGMSTREAMCHANNEL * loop_channels;
 
+    if (channel_count <= 0) return NULL;
+
     vgmstream = calloc(1,sizeof(VGMSTREAM));
     if (!vgmstream) return NULL;
 
@@ -541,6 +545,9 @@ void describe_vgmstream(VGMSTREAM * vgmstream, char * desc, int length) {
         case meta_DSP_CSTR:
             snprintf(temp,TEMPSIZE,"Namco Cstr header");
             break;
+        case meta_GCSW:
+            snprintf(temp,TEMPSIZE,"GCSW header");
+            break;
         default:
             snprintf(temp,TEMPSIZE,"THEY SHOULD HAVE SENT A POET");
     }

src/vgmstream.h

@@ -75,6 +75,7 @@ typedef enum {
     meta_kRAW,              /* almost headerless PCM */
     meta_RSF,               /* Retro Studios RSF, no header (.rsf) */
     meta_HALPST,            /* HAL Labs HALPST */
+    meta_GCSW,              /* GCSW (PCM) */
 } meta_t;
 
 typedef struct {