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55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* ALP - from High Voltage games [LEGO Racers (PC), NBA Inside Drive 2000 (PC)] */
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VGMSTREAM* init_vgmstream_alp(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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/* checks */
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if (!is_id32be(0x00,sf, "ALP "))
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goto fail;
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/* .tun: stereo
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* .pcm: mono */
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if (!check_extensions(sf,"tun,pcm"))
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goto fail;
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start_offset = read_u32le(0x04, sf) + 0x08;
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if (!is_id32be(0x08,sf, "ADPC")) /* codec, probably */
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goto fail;
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/* 0x0c: "M\0\0" */
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channels = read_u8(0x0f, sf);
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/* NBA Inside Drive 2000 (PC) */
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if (start_offset >= 0x14)
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sample_rate = read_s32le(0x10, sf); /* still 22050 though */
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else
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sample_rate = 22050;
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loop_flag = 0;
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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_ALP;
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vgmstream->channels = channels;
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vgmstream->sample_rate = sample_rate;
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vgmstream->num_samples = ima_bytes_to_samples(get_streamfile_size(sf) - start_offset, channels);
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vgmstream->coding_type = coding_HV_IMA;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = 0x01;
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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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if (vgmstream) close_vgmstream(vgmstream);
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return NULL;
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}
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