mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-24 04:14:50 +01:00
eca9b83208
Remove layout_interleave_shortblock for clarity as the value is enough to signal its use. Also fix .snd last block calculation, and clean some metas since I was testing changes anyway.
70 lines
2.1 KiB
C
70 lines
2.1 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 *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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off_t start_offset;
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int channel_count, loop_flag, codec;
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/* checks */
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if (!check_extensions(streamFile, "strm"))
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goto fail;
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if (read_32bitBE(0x00,streamFile) != 0x5354524D) /* "STRM" */
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goto fail;
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if (read_32bitBE(0x04,streamFile) != 0xFFFE0001 && /* Old Header Check */
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(read_32bitBE(0x04,streamFile) != 0xFEFF0001)) /* Some newer games have a new flag */
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goto fail;
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if (read_32bitBE(0x10,streamFile) != 0x48454144 && /* "HEAD" */
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read_32bitLE(0x14,streamFile) != 0x50) /* 0x50-sized head is all I've seen */
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goto fail;
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codec = read_8bit(0x18,streamFile);
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loop_flag = read_8bit(0x19,streamFile);
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channel_count = read_8bit(0x1a,streamFile);
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if (channel_count > 2) goto fail;
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start_offset = read_32bitLE(0x28,streamFile);
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channel_count,loop_flag);
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if (!vgmstream) goto fail;
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vgmstream->sample_rate = (uint16_t)read_16bitLE(0x1c,streamFile);
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vgmstream->num_samples = read_32bitLE(0x24,streamFile);
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vgmstream->loop_start_sample = read_32bitLE(0x20,streamFile);
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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,streamFile);
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vgmstream->interleave_last_block_size = read_32bitLE(0x38,streamFile);
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if (!vgmstream_open_stream(vgmstream,streamFile,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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