mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-13 15:21:04 +01:00
113 lines
3.3 KiB
C
113 lines
3.3 KiB
C
#include "meta.h"
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#include "../util.h"
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/* Her Interactive Sound .his (Nancy Drew) */
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/* A somewhat transformed RIFF WAVE */
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VGMSTREAM * init_vgmstream_his(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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char filename[PATH_LIMIT];
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int channel_count;
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int loop_flag = 0;
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int bps = 0;
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off_t start_offset;
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const uint8_t header_magic_expected[0x16] = "Her Interactive Sound\x1a";
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uint8_t header_magic[0x16];
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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("his",filename_extension(filename))) goto fail;
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/* check header magic */
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if (0x16 != streamFile->read(streamFile, header_magic, 0, 0x16)) goto fail;
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if (memcmp(header_magic_expected, header_magic, 0x16)) goto fail;
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/* data chunk label */
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if (0x64617461 != read_32bitBE(0x24,streamFile)) goto fail;
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start_offset = 0x2c;
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channel_count = read_16bitLE(0x16,streamFile);
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/* 8-bit or 16-bit expected */
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switch (read_16bitLE(0x22,streamFile))
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{
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case 8:
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bps = 1;
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break;
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case 16:
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bps = 2;
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break;
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default:
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goto fail;
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}
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/* check bytes per frame */
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if (read_16bitLE(0x20,streamFile) != channel_count*bps) goto fail;
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/* check size */
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/* file size -8 */
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if ((read_32bitLE(0x1c,streamFile)+8) != get_streamfile_size(streamFile))
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goto fail;
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/* data chunk size, assume it occupies the rest of the file */
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//if ((read_32bitLE(0x28,streamFile)+start_offset) != get_streamfile_size(streamFile))
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// goto fail;
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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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vgmstream->num_samples = read_32bitLE(0x28,streamFile) / channel_count / bps;
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vgmstream->sample_rate = read_32bitLE(0x18,streamFile);
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vgmstream->meta_type = meta_HIS;
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vgmstream->layout_type = layout_none;
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if (bps == 2)
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{
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vgmstream->coding_type = coding_PCM16LE;
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if (channel_count == 2)
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{
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vgmstream->coding_type = coding_PCM16_int;
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vgmstream->interleave_block_size = 2;
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}
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}
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else // bps == 1
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{
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vgmstream->coding_type = coding_PCM8_U;
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if (channel_count == 2)
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{
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vgmstream->coding_type = coding_PCM8_U_int;
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vgmstream->interleave_block_size = 1;
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}
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}
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/* open the file for reading */
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{
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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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vgmstream->ch[0].streamfile = file;
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vgmstream->ch[0].channel_start_offset=
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vgmstream->ch[0].offset=start_offset;
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if (channel_count == 2)
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{
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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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vgmstream->ch[1].streamfile = file;
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vgmstream->ch[0].channel_start_offset=
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vgmstream->ch[1].offset=start_offset + vgmstream->interleave_block_size;
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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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