mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-13 23:31:05 +01:00
3ae797a88a
stdio optimizations include the prevention of 'doubly opening' a file. If a file is opened that is already opened, the file handle is duplicated instead of using the normal fopen call. git-svn-id: https://vgmstream.svn.sourceforge.net/svnroot/vgmstream@180 51a99a44-fe44-0410-b1ba-c3e57ba2b86b
74 lines
2.2 KiB
C
74 lines
2.2 KiB
C
#include "meta.h"
|
|
#include "../util.h"
|
|
|
|
/* .agsc - from Metroid Prime 2 */
|
|
|
|
VGMSTREAM * init_vgmstream_agsc(STREAMFILE *streamFile) {
|
|
VGMSTREAM * vgmstream = NULL;
|
|
char filename[260];
|
|
|
|
off_t header_offset;
|
|
off_t start_offset;
|
|
int channel_count;
|
|
int i;
|
|
|
|
/* check extension, case insensitive */
|
|
streamFile->get_name(streamFile,filename,sizeof(filename));
|
|
if (strcasecmp("agsc",filename_extension(filename))) goto fail;
|
|
|
|
/* check header */
|
|
if ((uint32_t)read_32bitBE(0,streamFile)!=0x00000001)
|
|
goto fail;
|
|
|
|
/* count length of name, including terminating 0 */
|
|
for (header_offset=4;header_offset < get_streamfile_size(streamFile) && read_8bit(header_offset,streamFile)!='\0';header_offset++);
|
|
|
|
header_offset ++;
|
|
|
|
channel_count = 1;
|
|
|
|
/* build the VGMSTREAM */
|
|
|
|
vgmstream = allocate_vgmstream(1,1);
|
|
if (!vgmstream) goto fail;
|
|
|
|
/* fill in the vital statistics */
|
|
vgmstream->num_samples = read_32bitBE(header_offset+0xda,streamFile);
|
|
vgmstream->sample_rate = (uint16_t)read_16bitBE(header_offset+0xd8,streamFile);
|
|
|
|
vgmstream->loop_start_sample = read_32bitBE(header_offset+0xde,streamFile);
|
|
/* this is cute, we actually have a "loop length" */
|
|
vgmstream->loop_end_sample = (vgmstream->loop_start_sample + read_32bitBE(header_offset+0xe2,streamFile))-1;
|
|
|
|
vgmstream->coding_type = coding_NGC_DSP;
|
|
vgmstream->layout_type = layout_none;
|
|
vgmstream->meta_type = meta_DSP_AGSC;
|
|
|
|
for (i=0;i<16;i++) {
|
|
vgmstream->ch[0].adpcm_coef[i]=read_16bitBE(header_offset+0xf6+i*2,streamFile);
|
|
}
|
|
|
|
start_offset = header_offset+0x116;
|
|
|
|
/* open the file for reading by each channel */
|
|
{
|
|
int i;
|
|
for (i=0;i<channel_count;i++) {
|
|
vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
|
|
|
|
if (!vgmstream->ch[i].streamfile) goto fail;
|
|
|
|
vgmstream->ch[i].channel_start_offset=
|
|
vgmstream->ch[i].offset=
|
|
start_offset;
|
|
}
|
|
}
|
|
|
|
return vgmstream;
|
|
|
|
/* clean up anything we may have opened */
|
|
fail:
|
|
if (vgmstream) close_vgmstream(vgmstream);
|
|
return NULL;
|
|
}
|