72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
#include "meta.h"
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#include "../util.h"
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/* STRM - common Nintendo NDS streaming format */
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VGMSTREAM* init_vgmstream_nds_strm(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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off_t start_offset;
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int channels, loop_flag, codec, sample_rate;
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/* checks */
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if (!is_id32be(0x00,sf, "STRM"))
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goto fail;
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if (!check_extensions(sf, "strm"))
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goto fail;
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/* BOM check? */
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if (read_u32be(0x04,sf) != 0xFFFE0001 &&
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read_u32be(0x04,sf) != 0xFEFF0001) /* newer games? */
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goto fail;
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if (!is_id32be(0x10,sf, "HEAD") &&
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read_u32le(0x14,sf) != 0x50)
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goto fail;
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codec = read_u8(0x18,sf);
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loop_flag = read_u8(0x19,sf);
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sample_rate = read_u16le(0x1c,sf);
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channels = read_u8(0x1a,sf);
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if (channels > 2) goto fail;
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start_offset = read_u32le(0x28,sf);
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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->sample_rate = sample_rate;
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vgmstream->num_samples = read_32bitLE(0x24,sf);
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vgmstream->loop_start_sample = read_32bitLE(0x20,sf);
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vgmstream->loop_end_sample = vgmstream->num_samples;
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vgmstream->meta_type = meta_STRM;
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switch (codec) {
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case 0x00: /* [Bleach - Dark Souls (DS)] */
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vgmstream->coding_type = coding_PCM8;
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break;
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case 0x01:
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vgmstream->coding_type = coding_PCM16LE;
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break;
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case 0x02: /* [SaGa 2 (DS)] */
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vgmstream->coding_type = coding_NDS_IMA;
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break;
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default:
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goto fail;
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}
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = read_32bitLE(0x30,sf);
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vgmstream->interleave_last_block_size = read_32bitLE(0x38,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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