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https://github.com/vgmstream/vgmstream.git
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47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* BG00 - from Cave games [Ibara (PS2), Mushihime-sama (PS2)] */
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VGMSTREAM* init_vgmstream_bg00(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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uint32_t start_offset;
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int channels, loop_flag = 0;
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/* check */
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if (!is_id32be(0x00,sf, "BG00"))
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return NULL;
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/* .bg00: header ID (no filenames or debug strings) */
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if (!check_extensions(sf,"bg00"))
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return NULL;
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if (!is_id32be(0x40,sf, "VAGp"))
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return NULL;
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if (!is_id32be(0x70,sf, "VAGp"))
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return NULL;
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loop_flag = 0; /* flag at 0x08? loop points seem external */
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channels = 2; /* mono files use regular VAG */
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start_offset = 0x800;
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channels,loop_flag);
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if (!vgmstream) goto fail;
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vgmstream->meta_type = meta_BG00;
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vgmstream->sample_rate = read_s32be(0x80,sf);
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vgmstream->num_samples = ps_bytes_to_samples(read_32bitBE(0x4C,sf), 1);
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vgmstream->coding_type = coding_PSX;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = read_32bitLE(0x10,sf);
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if (!vgmstream_open_stream(vgmstream, sf, start_offset))
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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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