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80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* .MUS - Vicious Cycle games [Dinotopia: The Sunstone Odyssey (GC/Xbox), Robotech: Battlecry (PS2/Xbox)] */
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VGMSTREAM* init_vgmstream_mus_vc(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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off_t start_offset;
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int loop_flag, channels, sample_rate;
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int big_endian, type;
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int32_t(*read_32bit)(off_t, STREAMFILE*) = NULL;
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/* checks */
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if (!check_extensions(sf, "mus"))
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goto fail;
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if (read_u32be(0x08,sf) != 0xBBBBBBBB &&
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read_u32be(0x14,sf) != 0xBBBBBBBB &&
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read_u32be(0x2c,sf) != 0xBEBEBEBE)
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goto fail;
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big_endian = (read_u32be(0x00,sf) == 0xFBBFFBBF);
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read_32bit = big_endian ? read_32bitBE : read_32bitLE;
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type = read_32bit(0x04, sf);
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/* 0x08: pseudo size? */
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/* other fields may be chunk sizes and lesser stuff */
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/* 0x88: codec header */
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channels = read_32bit(0x54,sf); /* assumed */
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if (channels != 1) goto fail;
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sample_rate = read_32bit(0x58,sf);
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loop_flag = 1; /* most files repeat except small jingles, but smaller ambient tracks also repeat */
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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_MUS_VC;
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vgmstream->sample_rate = sample_rate;
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switch(type) {
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case 0x01:
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vgmstream->coding_type = coding_NGC_DSP;
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vgmstream->layout_type = layout_none;
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vgmstream->num_samples = dsp_bytes_to_samples(read_32bit(0xB0,sf), vgmstream->channels);
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vgmstream->loop_start_sample = 0;
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vgmstream->loop_end_sample = vgmstream->num_samples;
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start_offset = 0xB8;
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dsp_read_coefs_be(vgmstream,sf,0x88,0x00);
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dsp_read_hist_be (vgmstream,sf,0xac,0x00);
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break;
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case 0x02:
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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(read_32bit(0x9a,sf), vgmstream->channels);
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vgmstream->loop_start_sample = 0;
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vgmstream->loop_end_sample = vgmstream->num_samples;
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start_offset = 0x9e;
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break;
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default:
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goto fail;
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}
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read_string(vgmstream->stream_name,0x14, 0x34,sf); /* repeated at 0x64, size at 0x30/0x60 */
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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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