mirror of
https://github.com/vgmstream/vgmstream.git
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76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
#include "meta.h"
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#include "../layout/layout.h"
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#include "../util.h"
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/* .AST - from Nintendo games [Super Mario Galaxy (Wii), Pac-Man Vs (GC)] */
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VGMSTREAM * init_vgmstream_ast(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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off_t start_offset;
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int loop_flag, channel_count, codec;
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int big_endian;
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int32_t (*read_32bit)(off_t,STREAMFILE*) = NULL;
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int16_t (*read_16bit)(off_t,STREAMFILE*) = NULL;
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/* checks */
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if (!check_extensions(streamFile, "ast"))
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goto fail;
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if (((uint32_t)read_32bitBE(0x00, streamFile) == 0x5354524D) && /* "STRM" */
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((uint32_t)read_32bitBE(0x40, streamFile) == 0x424C434B)) { /* "BLCK" */
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read_32bit = read_32bitBE;
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read_16bit = read_16bitBE;
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big_endian = 1;
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} else if (((uint32_t)read_32bitBE(0x00, streamFile) == 0x4D525453) && /* "MRTS" */ // Super Mario Galaxy (Super Mario 3D All-Stars (Switch))
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((uint32_t)read_32bitBE(0x40, streamFile) == 0x4B434C42)) { /* "KCLB" */
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read_32bit = read_32bitLE;
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read_16bit = read_16bitLE;
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big_endian = 0;
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} else {
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goto fail;
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}
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if (read_16bit(0x0a,streamFile) != 0x10) /* ? */
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goto fail;
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if (read_32bit(0x04,streamFile)+0x40 != get_streamfile_size(streamFile))
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goto fail;
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codec = read_16bitBE(0x08,streamFile); // always big-endian?
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channel_count = read_16bit(0x0c,streamFile);
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loop_flag = read_16bit(0x0e,streamFile);
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//max_block = read_32bit(0x20,streamFile);
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start_offset = 0x40;
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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->meta_type = meta_AST;
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vgmstream->sample_rate = read_32bit(0x10,streamFile);
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vgmstream->num_samples = read_32bit(0x14,streamFile);
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vgmstream->loop_start_sample = read_32bit(0x18,streamFile);
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vgmstream->loop_end_sample = read_32bit(0x1c,streamFile);
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vgmstream->codec_endian = big_endian;
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vgmstream->layout_type = layout_blocked_ast;
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switch (codec) {
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case 0x00: /* , Pikmin 2 (GC) */
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vgmstream->coding_type = coding_NGC_AFC;
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break;
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case 0x01: /* Mario Kart: Double Dash!! (GC) */
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vgmstream->coding_type = coding_PCM16BE;
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break;
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default:
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goto fail;
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}
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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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