mirror of
https://github.com/vgmstream/vgmstream.git
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144 lines
4.0 KiB
C
144 lines
4.0 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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//todo test and rethink usefulness/viability of globally using this
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/* generic helper with a usable fields to describe static header values */
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typedef struct {
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int codec;
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int type;
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int channels;
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int sample_rate;
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int loop_flag;
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int loop_start;
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int loop_end;
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int total_subsongs;
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int target_subsong;
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size_t file_size;
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off_t info_start;
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off_t header_start;
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size_t header_entry;
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off_t header_offset;
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off_t data_start;
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size_t data_size;
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off_t stream_start;
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size_t stream_size;
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} header_t;
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/* XSSB - from Artoon games [Blinx (Xbox), Blinx 2 (Xbox)] */
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VGMSTREAM* init_vgmstream_xssb(STREAMFILE *sf) {
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VGMSTREAM *vgmstream = NULL;
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//off_t start_offset, header_offset, data_start, info_start, header_start;
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//size_t header_size, stream_size;
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//int loop_flag, channel_count, sample_rate, codec, loop_start, loop_end;
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//int total_subsongs, target_subsong = streamFile->stream_index;
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header_t h;
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/* checks */
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/* .bin: from named files inside .ipk bigfiles */
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if (!check_extensions(sf, "bin,lbin"))
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goto fail;
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if (read_u32be(0x00, sf) != 0x58535342) /* "XSSB" */
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goto fail;
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/* 0x04: null */
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/* 0x08: date-version ('20011217' in hex) */
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/* 0x0c: null */
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h.info_start = read_s32le(0x10, sf);
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h.header_start = read_s32le(0x14, sf);
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h.data_start = read_s32le(0x18, sf);
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/* 0x1c: null */
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h.header_entry = read_s16le(h.info_start + 0x00, sf);
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/* 0x02: always 127 */
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/* get subsongs from header entries */
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{
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off_t offset = h.header_start;
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h.total_subsongs = 0;
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h.target_subsong = sf->stream_index <= 0 ? 1 : sf->stream_index;
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h.header_offset = 0;
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while (offset < h.data_start) {
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/* headers are just pasted together and then padding */
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if (read_u32be(offset, sf) == 0)
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break;
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h.total_subsongs++;
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if (h.target_subsong == h.total_subsongs) {
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h.header_offset = offset;
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}
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offset += h.header_entry;
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}
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if (h.header_offset == 0)
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goto fail;
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if (h.target_subsong > h.total_subsongs || h.total_subsongs < 1)
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goto fail;
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}
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/* read header */
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h.codec = read_s16le(h.header_offset + 0x00, sf);
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h.channels = read_s16le(h.header_offset + 0x02, sf);
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h.sample_rate = read_u16le(h.header_offset + 0x04, sf);
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/* 0x08: bitrate */
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/* 0x0c: block align/bps */
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/* 0x10: 0=PCM, 2=XBOX-IMA? */
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h.stream_start = read_s32le(h.header_offset + 0x14, sf) + h.data_start;
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h.stream_size = read_s32le(h.header_offset + 0x18, sf);
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h.loop_start = read_s32le(h.header_offset + 0x1c, sf);
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h.loop_end = read_s32le(h.header_offset + 0x20, sf);
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/* others: unknown and mostly fixed values */
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h.loop_flag = (h.loop_end > 0);
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(h.channels, h.loop_flag);
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if (!vgmstream) goto fail;
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vgmstream->meta_type = meta_XSSB;
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vgmstream->sample_rate = h.sample_rate;
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vgmstream->loop_start_sample = h.loop_start;
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vgmstream->loop_end_sample = h.loop_end;
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vgmstream->num_streams = h.total_subsongs;
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vgmstream->stream_size = h.stream_size;
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switch(h.codec) {
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case 0x01:
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vgmstream->coding_type = coding_PCM16LE;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = 0x01;
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vgmstream->num_samples = pcm_bytes_to_samples(h.stream_size, h.channels, 16);
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break;
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case 0x69:
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vgmstream->coding_type = coding_XBOX_IMA;
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vgmstream->layout_type = layout_none;
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vgmstream->num_samples = xbox_ima_bytes_to_samples(h.stream_size, h.channels);
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break;
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default:
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goto fail;
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}
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if (!vgmstream_open_stream(vgmstream, sf, h.stream_start))
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goto fail;
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return vgmstream;
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fail:
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close_vgmstream(vgmstream);
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return NULL;
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}
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