vgmstream/src/meta/p3d.c

118 lines
3.9 KiB
C
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#include "meta.h"
#include "../util.h"
/* P3D, with Radical ADPCM, from Prototype */
VGMSTREAM * init_vgmstream_p3d(STREAMFILE *streamFile) {
VGMSTREAM * vgmstream = NULL;
char filename[260];
off_t parse_offset;
off_t start_offset;
size_t file_size;
uint32_t header_size;
uint32_t sample_rate;
uint32_t body_bytes;
int loop_flag;
int channel_count;
const int interleave = 0x14;
/* check extension, case insensitive */
streamFile->get_name(streamFile,filename,sizeof(filename));
if (strcasecmp("p3d",filename_extension(filename))) goto fail;
/* check header */
if (read_32bitBE(0x0,streamFile) != 0x503344FF) /* P3D\xFF */
goto fail;
header_size = read_32bitLE(0x4,streamFile);
if (0xC != header_size) goto fail;
file_size = get_streamfile_size(streamFile);
if (read_32bitLE(0x8,streamFile) != file_size) goto fail;
if (read_32bitBE(0xC,streamFile) != 0xFE) goto fail;
/* body size twice? */
if (read_32bitLE(0x10,streamFile) + header_size != file_size) goto fail;
if (read_32bitLE(0x14,streamFile) + header_size != file_size) goto fail;
/* mysterious 10! */
if (read_32bitLE(0x18,streamFile) != 10) goto fail;
/* parse header text */
parse_offset = 0x1C;
{
int text_len = read_32bitLE(parse_offset,streamFile);
if (9 != text_len) goto fail;
/* AudioFile */
if (read_32bitBE(parse_offset+4,streamFile) != 0x41756469 ||
read_32bitBE(parse_offset+8,streamFile) != 0x6F46696C ||
read_16bitBE(parse_offset+12,streamFile) != 0x6500) goto fail;
parse_offset += 4 + text_len + 1;
}
channel_count = read_32bitLE(parse_offset,streamFile);
parse_offset += 4;
{
int i;
/* channel names? */
for (i = 0; i < channel_count; i++)
{
int text_len = read_32bitLE(parse_offset,streamFile);
parse_offset += 4 + text_len + 1;
}
}
/* info count? */
if (1 != read_32bitLE(parse_offset,streamFile)) goto fail;
parse_offset += 4;
{
int text_len = read_32bitLE(parse_offset,streamFile);
if (4 != text_len) goto fail;
/* radp */
if (read_32bitBE(parse_offset+4,streamFile) != 0x72616470 ||
read_8bit(parse_offset+8,streamFile) != 0) goto fail;
parse_offset += 4 + text_len + 1;
}
/* real RADP header */
if (0x52414450 != read_32bitBE(parse_offset,streamFile)) goto fail;
if (read_32bitLE(parse_offset+4,streamFile) != channel_count) goto fail;
sample_rate = read_32bitLE(parse_offset+8,streamFile);
/* codec id? */
//if (9 != read_32bitLE(parse_offset+0xC,streamFile)) goto fail;
body_bytes = read_32bitLE(parse_offset+0x10,streamFile);
start_offset = parse_offset+0x14;
if (start_offset + body_bytes != file_size) goto fail;
loop_flag = 0;
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channel_count,loop_flag);
if (!vgmstream) goto fail;
/* fill in the vital statistics */
vgmstream->channels = channel_count;
vgmstream->sample_rate = sample_rate;
vgmstream->coding_type = coding_RAD_IMA_mono;
vgmstream->interleave_block_size = interleave;
vgmstream->num_samples = body_bytes / interleave / channel_count * 32;
vgmstream->layout_type = layout_interleave;
vgmstream->meta_type = meta_P3D;
/* open the file for reading */
{
int i;
STREAMFILE * file;
file = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
if (!file) goto fail;
for (i=0;i<channel_count;i++) {
vgmstream->ch[i].streamfile = file;
vgmstream->ch[i].offset=vgmstream->ch[i].channel_start_offset=start_offset+interleave*i;
}
}
return vgmstream;
fail:
/* clean up anything we may have opened */
if (vgmstream) close_vgmstream(vgmstream);
return NULL;
}