vgmstream/src/meta/ps3_xvag.c

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6.4 KiB
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#include "meta.h"
#include "../coding/coding.h"
#include "../util.h"
/* XVAG (from Ratchet & Clank Future: Quest for Booty) */
/* v0.1 : bxaimc : Initial release */
/* v0.2 : Fastelbja : add support for loops points */
/* + little endian header values */
VGMSTREAM * init_vgmstream_ps3_xvag(STREAMFILE *streamFile) {
VGMSTREAM * vgmstream = NULL;
char filename[260];
uint8_t testBuffer[0x10];
off_t start_offset;
off_t fileLength;
int loop_flag = 0;
int channel_count;
off_t readOffset = 0;
int little_endian = 0;
long sample_rate = 0;
long num_samples = 0;
#ifdef VGM_USE_MPEG
mpeg_codec_data *mpeg_data = NULL;
coding_t mpeg_coding_type = coding_MPEG1_L3;
#endif
int loopStartPointsCount=0;
int loopEndPointsCount=0;
uint16_t mp3ID;
off_t loopStartPoints[0x10];
off_t loopEndPoints[0x10];
off_t loopStart = 0;
off_t loopEnd = 0;
/* check extension, case insensitive */
streamFile->get_name(streamFile,filename,sizeof(filename));
if (strcasecmp("xvag",filename_extension(filename))) goto fail;
/* check header */
if (read_32bitBE(0x00,streamFile) != 0x58564147) /* "XVAG" */
goto fail;
fileLength = get_streamfile_size(streamFile);
if (read_8bit(0x07,streamFile)==0)
little_endian=1;
if(little_endian)
{
channel_count = read_32bitLE(0x28,streamFile);
start_offset = read_32bitLE(0x4,streamFile);
sample_rate = read_32bitLE(0x3c,streamFile);
num_samples = read_32bitLE(0x30,streamFile);
}
else
{
channel_count = read_32bitBE(0x28,streamFile);
start_offset = read_32bitBE(0x4,streamFile);
sample_rate = read_32bitBE(0x3c,streamFile);
num_samples = read_32bitBE(0x30,streamFile);
}
readOffset=start_offset;
// MP3s ?
mp3ID=(uint16_t)read_16bitBE(start_offset,streamFile);
if(mp3ID==0xFFFB) {
#ifdef VGM_USE_MPEG
int rate;
int channels;
mpeg_data = init_mpeg_codec_data(streamFile, start_offset, -1, -1, &mpeg_coding_type, &rate, &channels); // -1 to not check sample rate or channels
if (!mpeg_data) goto fail;
channel_count = channels;
sample_rate = rate;
#else
// reject if no MPEG support
goto fail;
#endif
} else {
// get the loops the same way we get on .MIB
do {
readOffset+=(off_t)read_streamfile(testBuffer,readOffset,0x10,streamFile);
// Loop Start ...
if(testBuffer[0x01]==0x06)
{
if(loopStartPointsCount<0x10)
{
loopStartPoints[loopStartPointsCount] = readOffset-0x10;
loopStartPointsCount++;
}
}
// Loop End ...
if(((testBuffer[0x01]==0x03) && (testBuffer[0x03]!=0x77)) ||
(testBuffer[0x01]==0x01))
{
if(loopEndPointsCount<0x10)
{
loopEndPoints[loopEndPointsCount] = readOffset; //-0x10;
loopEndPointsCount++;
}
}
} while (readOffset<((int32_t)fileLength));
// Calc Loop Points & Interleave ...
if(loopStartPointsCount>=channel_count)
{
// can't get more then 0x10 loop point !
if((loopStartPointsCount<=0x0F) && (loopStartPointsCount>=2))
{
// Always took the first 2 loop points
loopStart=loopStartPoints[1]-start_offset;
loop_flag=1;
} else
loopStart=0;
}
if(loopEndPointsCount>=channel_count)
{
// can't get more then 0x10 loop point !
if((loopEndPointsCount<=0x0F) && (loopEndPointsCount>=2)) {
loop_flag=1;
loopEnd=loopEndPoints[loopEndPointsCount-1]-start_offset;
} else {
loopEnd=0;
}
}
// as i can get on the header if a song is looped or not
// if try to take the loop marker on the file
// if the last byte of the file is = 00 is assume that the song is not looped
// i know that i can cover 95% of the file, but can't work on some of them
if(read_8bit((fileLength-1),streamFile)==0)
loop_flag=0;
}
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channel_count,loop_flag);
if (!vgmstream) goto fail;
vgmstream->sample_rate = sample_rate;
vgmstream->num_samples = num_samples;
vgmstream->channels = channel_count;
vgmstream->meta_type = meta_PS3_XVAG;
if(mp3ID==0xFFFB) {
#ifdef VGM_USE_MPEG
/* NOTE: num_samples seems to be quite wrong for MPEG */
vgmstream->codec_data = mpeg_data;
vgmstream->layout_type = layout_mpeg;
vgmstream->coding_type = mpeg_coding_type;
#else
// reject if no MPEG support
goto fail;
#endif
}
else {
vgmstream->layout_type = layout_interleave;
vgmstream->interleave_block_size = 0x10;
vgmstream->coding_type = coding_PSX;
}
if (loop_flag) {
if(loopStart!=0) {
vgmstream->loop_start_sample = ((((loopStart/vgmstream->interleave_block_size)-1)*vgmstream->interleave_block_size)/16*28)/channel_count;
if(loopStart%vgmstream->interleave_block_size) {
vgmstream->loop_start_sample += (((loopStart%vgmstream->interleave_block_size)-1)/16*14*channel_count);
}
}
vgmstream->loop_end_sample = ((((loopEnd/vgmstream->interleave_block_size)-1)*vgmstream->interleave_block_size)/16*28)/channel_count;
if(loopEnd%vgmstream->interleave_block_size) {
vgmstream->loop_end_sample += (((loopEnd%vgmstream->interleave_block_size)-1)/16*14*channel_count);
}
}
/* open the file for reading */
{
int i;
STREAMFILE * file;
if(vgmstream->layout_type == layout_interleave) {
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].channel_start_offset=
vgmstream->ch[i].offset=start_offset+
vgmstream->interleave_block_size*i;
}
}
#ifdef VGM_USE_MPEG
else if(vgmstream->layout_type == layout_mpeg) {
for (i=0;i<channel_count;i++) {
vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,MPEG_BUFFER_SIZE);
vgmstream->ch[i].channel_start_offset= vgmstream->ch[i].offset=start_offset;
}
}
#endif
else { goto fail; }
}
return vgmstream;
/* clean up anything we may have opened */
fail:
#ifdef VGM_USE_MPEG
if (mpeg_data) {
mpg123_delete(mpeg_data->m);
free(mpeg_data);
if (vgmstream) {
vgmstream->codec_data = NULL;
}
}
#endif
if (vgmstream) close_vgmstream(vgmstream);
return NULL;
}