127 lines
3.8 KiB
C
127 lines
3.8 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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typedef enum { PSX, PCM, DSP } sdf_codec;
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/* SDF - from Beyond Reality games */
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VGMSTREAM* init_vgmstream_sdf(STREAMFILE* sf) {
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VGMSTREAM * vgmstream = NULL;
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off_t start_offset;
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size_t data_size;
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int loop_flag, channels, sample_rate, interleave, coefs_offset;
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sdf_codec codec;
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/* checks */
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if (!check_extensions(sf,"sdf"))
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goto fail;
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if (!is_id32be(0x00,sf, "SDF\0"))
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goto fail;
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if (read_u32le(0x04,sf) != 3) /* version? */
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goto fail;
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data_size = read_u32le(0x08,sf);
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start_offset = get_streamfile_size(sf) - data_size;
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switch(start_offset) {
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case 0x18:
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if (read_u32le(0x10,sf) > 6) {
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/* Hugo Magic in the Troll Woods (NDS) */
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/* 0x0c: some size? */
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sample_rate = read_s32le(0x10,sf);
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channels = read_u8(0x14,sf);
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/* 0x14: 1? */
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interleave = read_u16le(0x16,sf);
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codec = PCM;
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}
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else {
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/* Agent Hugo: Lemoon Twist (PS2) */
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sample_rate = read_s32le(0x0c,sf);
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channels = read_u32le(0x10,sf);
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interleave = read_u32le(0x14,sf);
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codec = PSX;
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}
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break;
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case 0x78: /* Gummy Bears Mini Golf (3DS) */
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sample_rate = read_s32le(0x10,sf);
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channels = read_u32le(0x14,sf);
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interleave = read_u32le(0x18,sf);
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coefs_offset = 0x1c;
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codec = DSP;
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break;
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case 0x84: /* Mr. Bean's Wacky World (Wii) */
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sample_rate = read_s32le(0x10,sf);
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channels = read_u32le(0x14,sf);
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interleave = read_u32le(0x18,sf);
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data_size = read_u32le(0x20,sf); /* usable size */
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coefs_offset = 0x28;
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codec = DSP;
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break;
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default:
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goto fail;
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}
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loop_flag = 1;
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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_SDF;
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vgmstream->sample_rate = sample_rate;
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switch(codec) {
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case PCM:
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vgmstream->coding_type = coding_PCM16LE;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = interleave;
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vgmstream->num_samples = pcm16_bytes_to_samples(data_size, channels);
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break;
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case PSX:
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vgmstream->coding_type = coding_PSX;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = interleave;
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vgmstream->num_samples = ps_bytes_to_samples(data_size, channels);
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break;
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case DSP:
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vgmstream->coding_type = coding_NGC_DSP;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = interleave;
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if (vgmstream->interleave_block_size == 0) /* Gummy Bears Mini Golf */
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vgmstream->interleave_block_size = data_size / channels;
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vgmstream->num_samples = dsp_bytes_to_samples(data_size, channels);
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dsp_read_coefs_le(vgmstream, sf, coefs_offset+0x00,0x2e);
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dsp_read_hist_le (vgmstream, sf, coefs_offset+0x24,0x2e);
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break;
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default:
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goto fail;
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}
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/* most songs simply repeat; don't loop if too short (in seconds) */
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if (vgmstream->num_samples > 10*sample_rate) {
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vgmstream->loop_start_sample = 0;
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vgmstream->loop_end_sample = vgmstream->num_samples;
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}
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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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