mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-19 18:05:52 +01:00
111 lines
3.0 KiB
C
111 lines
3.0 KiB
C
#include "meta.h"
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#include "../util.h"
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/* sadl (only the Professor Layton interleaved IMA version) */
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VGMSTREAM * init_vgmstream_sadl(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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char filename[PATH_LIMIT];
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off_t start_offset;
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int loop_flag;
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int channel_count;
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int coding_type;
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/* check extension, case insensitive */
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streamFile->get_name(streamFile,filename,sizeof(filename));
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if (strcasecmp("sad",filename_extension(filename))) goto fail;
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/* check header */
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if (read_32bitBE(0x00,streamFile) != 0x7361646c) /* "sadl" */
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goto fail;
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/* check file size */
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if (read_32bitLE(0x40,streamFile) != get_streamfile_size(streamFile) )
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goto fail;
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/* check coding type */
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switch (read_8bit(0x33,streamFile)&0xf0)
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{
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case 0x70:
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coding_type = coding_IMA_int;
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break;
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case 0xb0:
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coding_type = coding_NDS_PROCYON;
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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 = read_8bit(0x31,streamFile);
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channel_count = read_8bit(0x32,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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/* fill in the vital statistics */
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start_offset = 0x100;
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vgmstream->channels = channel_count;
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switch (read_8bit(0x33,streamFile) & 6)
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{
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case 4:
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vgmstream->sample_rate = 32728;
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break;
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case 2:
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vgmstream->sample_rate = 16364;
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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->coding_type = coding_type;
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if (coding_type == coding_IMA_int)
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vgmstream->num_samples =
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(read_32bitLE(0x40,streamFile)-start_offset)/channel_count*2;
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else if (coding_type == coding_NDS_PROCYON)
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vgmstream->num_samples =
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(read_32bitLE(0x40,streamFile)-start_offset)/channel_count/16*30;
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vgmstream->interleave_block_size=0x10;
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if (loop_flag)
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{
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if (coding_type == coding_IMA_int)
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vgmstream->loop_start_sample = (read_32bitLE(0x54,streamFile)-start_offset)/channel_count*2;
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else
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vgmstream->loop_start_sample = (read_32bitLE(0x54,streamFile)-start_offset)/channel_count/16*30;
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vgmstream->loop_end_sample = vgmstream->num_samples;
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}
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if (channel_count > 1)
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vgmstream->layout_type = layout_interleave;
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else
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vgmstream->layout_type = layout_none;
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vgmstream->meta_type = meta_SADL;
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/* open the file for reading */
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{
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int i;
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STREAMFILE * file;
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file = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
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if (!file) goto fail;
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for (i=0;i<channel_count;i++) {
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vgmstream->ch[i].streamfile = file;
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vgmstream->ch[i].channel_start_offset=
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vgmstream->ch[i].offset=start_offset+
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vgmstream->interleave_block_size*i;
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}
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}
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return vgmstream;
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/* clean up anything we may have opened */
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fail:
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if (vgmstream) close_vgmstream(vgmstream);
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return NULL;
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}
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