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50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
#include "meta.h"
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/* ADP - from Balls of Steel */
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VGMSTREAM * init_vgmstream_pc_adp_bos(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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off_t start_offset;
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int loop_flag = 0;
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int channel_count;
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if (!check_extensions(streamFile,"adp")) goto fail;
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/* check header */
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if (read_32bitBE(0x00,streamFile) != 0x41445021) /* "ADP!" */
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goto fail;
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loop_flag = (-1 != read_32bitLE(0x08,streamFile));
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channel_count = 1;
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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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/* fill in the vital statistics */
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start_offset = 0x18;
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vgmstream->channels = channel_count;
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vgmstream->sample_rate = read_32bitLE(0x0C,streamFile);
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vgmstream->num_samples = read_32bitLE(0x04,streamFile);
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if (loop_flag) {
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vgmstream->loop_start_sample = read_32bitLE(0x08,streamFile);
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vgmstream->loop_end_sample = vgmstream->num_samples;
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}
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vgmstream->coding_type = coding_DVI_IMA;
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vgmstream->layout_type = layout_none;
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vgmstream->meta_type = meta_BOS_ADP;
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// 0x10, 0x12 - both initial history?
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//vgmstream->ch[0].adpcm_history1_32 = read_16bitLE(0x10,streamFile);
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// 0x14 - initial step index?
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//vgmstream->ch[0].adpcm_step_index = read_32bitLE(0x14,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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