110 lines
3.7 KiB
C
110 lines
3.7 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* SEG - from Stormfront games [Eragon (multi), Forgotten Realms: Demon Stone (multi) */
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VGMSTREAM* init_vgmstream_seg(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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off_t start_offset;
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int loop_flag, channel_count;
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size_t data_size;
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uint32_t codec;
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int32_t (*read_32bit)(off_t,STREAMFILE*) = NULL;
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/* checks */
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if (!is_id32be(0x00,sf, "seg\0"))
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goto fail;
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if (!check_extensions(sf, "seg"))
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goto fail;
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codec = read_32bitBE(0x04,sf);
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/* 0x08: version? (2: Eragon, Spiderwick Chronicles Wii / 3: Spiderwick Chronicles X360 / 4: Spiderwick Chronicles PC) */
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if (guess_endianness32bit(0x08,sf)) {
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read_32bit = read_32bitBE;
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} else {
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read_32bit = read_32bitLE;
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}
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/* 0x0c: file size */
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data_size = read_32bit(0x10, sf); /* including interleave padding */
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/* 0x14: null */
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loop_flag = read_32bit(0x20,sf); /* rare */
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channel_count = read_32bit(0x24,sf);
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/* 0x28: extradata 1 entries (0x08 per entry, unknown) */
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/* 0x2c: extradata 1 offset */
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/* 0x30: extradata 2 entries (0x10 or 0x14 per entry, seek/hist table?) */
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/* 0x34: extradata 2 offset */
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start_offset = 0x4000;
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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->meta_type = meta_SEG;
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vgmstream->sample_rate = read_32bit(0x18,sf);
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vgmstream->num_samples = read_32bit(0x1c,sf);
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if (loop_flag) {
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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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read_string(vgmstream->stream_name,0x20+1, 0x38,sf);
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switch(codec) {
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case 0x70733200: /* "ps2\0" */
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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 = 0x2000;
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break;
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case 0x78627800: /* "xbx\0" */
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vgmstream->coding_type = coding_XBOX_IMA;
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vgmstream->layout_type = layout_none;
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break;
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case 0x77696900: /* "wii\0" */
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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 = 0x2000;
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vgmstream->interleave_first_skip = 0x60;
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vgmstream->interleave_first_block_size = vgmstream->interleave_block_size - vgmstream->interleave_first_skip;
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/* standard dsp header at start_offset */
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dsp_read_coefs_be(vgmstream, sf, start_offset+0x1c, vgmstream->interleave_block_size);
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dsp_read_hist_be(vgmstream, sf, start_offset+0x40, vgmstream->interleave_block_size);
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start_offset += vgmstream->interleave_first_skip;
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break;
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case 0x70635F00: /* "pc_\0" */
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vgmstream->coding_type = coding_IMA;
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vgmstream->layout_type = layout_none;
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break;
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#ifdef VGM_USE_FFMPEG
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case 0x78623300: { /* "xb3\0" */
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int block_size = 0x4000;
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vgmstream->codec_data = init_ffmpeg_xma2_raw(sf, start_offset, data_size, vgmstream->num_samples, vgmstream->channels, vgmstream->sample_rate, block_size, 0);
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if (!vgmstream->codec_data) goto fail;
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vgmstream->coding_type = coding_FFmpeg;
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vgmstream->layout_type = layout_none;
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xma_fix_raw_samples(vgmstream, sf, start_offset,data_size, 0, 0,0); /* samples are ok */
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break;
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}
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#endif
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default:
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goto fail;
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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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