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https://github.com/vgmstream/vgmstream.git
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70 lines
2.4 KiB
C
70 lines
2.4 KiB
C
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#include "meta.h"
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#include "../coding/coding.h"
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/* XMD - from Konami Xbox games [Silent Hill 4 (Xbox), Castlevania Curse of Darkness (Xbox)] */
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VGMSTREAM * init_vgmstream_xmd(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, sample_rate;
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size_t data_size, loop_start, frame_size;
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/* checks (.xmd comes from bigfiles with filenames) */
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if (!check_extensions(streamFile, "xmd"))
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goto fail;
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if ((read_32bitBE(0x00,streamFile) & 0xFFFFFF00) == 0x786D6400) { /* "xmd\0" */
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/* v2 from Castlevania: Curse of Darkness */
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channel_count = read_8bit(0x03,streamFile);
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sample_rate = (uint16_t)read_16bitLE(0x04, streamFile);
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data_size = read_32bitLE(0x06, streamFile);
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loop_flag = read_8bit(0x0a,streamFile);
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loop_start = read_32bitLE(0x0b, streamFile);
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/* 0x0f(2): unknown+config? */
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frame_size = 0x15;
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start_offset = 0x11;
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}
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else {
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/* v1 from Silent Hill 4 */
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channel_count = read_8bit(0x00,streamFile);
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sample_rate = (uint16_t)read_16bitLE(0x01, streamFile);
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data_size = read_32bitLE(0x03, streamFile);
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loop_flag = read_8bit(0x07,streamFile);
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loop_start = read_32bitLE(0x08, streamFile);
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frame_size = 0x0d;
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start_offset = 0x0c;
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}
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/* extra checks just in case */
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if (data_size > get_streamfile_size(streamFile))
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goto fail; /* v1 .xmd are sector-aligned with padding */
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if (channel_count > 2)
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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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vgmstream->sample_rate = sample_rate;
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vgmstream->num_samples = data_size / frame_size / channel_count * ((frame_size-0x06)*2 + 2); /* bytes to samples */
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if (loop_flag) {
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vgmstream->loop_start_sample = loop_start / frame_size / channel_count * ((frame_size-0x06)*2 + 2); /* bytes to samples */
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vgmstream->loop_end_sample = vgmstream->num_samples;
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}
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vgmstream->meta_type = meta_XMD;
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vgmstream->coding_type = coding_XMD;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = frame_size;
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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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