vgmstream/src/meta/gtd.c

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#include "meta.h"
#include "../coding/coding.h"
typedef enum { XMA2 } gtd_codec;
/* GTD - found in Knights Contract (X360, PS3), Valhalla Knights 3 (PSV) */
VGMSTREAM * init_vgmstream_gtd(STREAMFILE *streamFile) {
VGMSTREAM * vgmstream = NULL;
off_t start_offset, chunk_offset;
size_t data_size, chunk_size;
int loop_flag, channel_count, sample_rate;
int num_samples, loop_start_sample, loop_end_sample;
gtd_codec codec;
/* check extension, case insensitive */
if ( !check_extensions(streamFile,"gtd"))
goto fail;
if (read_32bitBE(0x00,streamFile) != 0x47485320) /* "GHS " */
goto fail;
VGM_LOG("1");
/* header type, not formally specified */
if (read_32bitBE(0x04,streamFile) == 1 && read_16bitBE(0x0C,streamFile) == 0x0166) { /* XMA2 */
/* 0x08(4): seek table size */
chunk_offset = 0x0c; /* custom header with a "fmt " data chunk inside */
chunk_size = 0x34;
channel_count = read_16bitBE(chunk_offset+0x02,streamFile);
sample_rate = read_32bitBE(chunk_offset+0x04,streamFile);
xma2_parse_fmt_chunk_extra(streamFile, chunk_offset, &loop_flag, &num_samples, &loop_start_sample, &loop_end_sample, 1);
start_offset = read_32bitBE(0x58,streamFile); /* always 0x800 */
data_size = read_32bitBE(0x5c,streamFile);
/* 0x40(18): null, 0x60(4): header size (0x70), 0x64(4): seek table size again, 0x68(8): null */
/* 0x70: seek table; then a "STPR" chunk with the file ID and filename */
codec = XMA2;
}
else {
/* there are PSV (LE, ATRAC9) and PS3 (MSF inside?) variations, somewhat-but-not-quite similar
* (contain the "STPR" chunk but the rest is mostly different) */
goto fail;
}
/* 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->loop_start_sample = loop_start_sample;
vgmstream->loop_end_sample = loop_end_sample;
vgmstream->meta_type = meta_GTD;
switch(codec) {
case XMA2: {
#ifdef VGM_USE_FFMPEG
uint8_t buf[0x100];
size_t bytes;
bytes = ffmpeg_make_riff_xma_from_fmt_chunk(buf,0x100, chunk_offset,chunk_size, data_size, streamFile, 1);
if (bytes <= 0) goto fail;
vgmstream->codec_data = init_ffmpeg_header_offset(streamFile, buf,bytes, start_offset,data_size);
if ( !vgmstream->codec_data ) goto fail;
vgmstream->coding_type = coding_FFmpeg;
vgmstream->layout_type = layout_none;
break;
}
#endif
default:
goto fail;
}
/* open the file for reading */
if ( !vgmstream_open_stream(vgmstream, streamFile, start_offset) )
goto fail;
return vgmstream;
fail:
close_vgmstream(vgmstream);
return NULL;
}