mirror of
https://github.com/vgmstream/vgmstream.git
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120 lines
3.5 KiB
C
120 lines
3.5 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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#include "../layout/layout.h"
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/* .str - 3DO format with CTRL/SNDS/SHDR blocks [Icebreaker (3DO), Battle Pinball (3DO)] */
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VGMSTREAM* init_vgmstream_str_snds(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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off_t start_offset, shdr_offset = -1;
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int loop_flag, channels, found_shdr = 0;
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size_t file_size, ctrl_size = -1;
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/* checks */
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/* .str: standard
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* .3do: Aqua World - Umimi Monogatari (3DO) movies */
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if (!check_extensions(sf, "str,3do"))
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goto fail;
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if (read_u32be(0x00,sf) != 0x4354524c && /* "CTRL" */
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read_u32be(0x00,sf) != 0x534e4453 && /* "SNDS" */
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read_u32be(0x00,sf) != 0x53484452) /* "SHDR" */
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goto fail;
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file_size = get_streamfile_size(sf);
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start_offset = 0x00;
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/* scan chunks until we find a SNDS containing a SHDR */
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{
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off_t offset = 0;
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uint32_t size;
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while (!found_shdr && offset < file_size) {
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if (offset < 0) goto fail;
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size = read_u32be(offset + 0x04,sf);
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if (offset + size >= file_size)
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goto fail;
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switch (read_u32be(offset + 0x00,sf)) {
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case 0x4354524C: /* "CTRL" */
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ctrl_size = read_u32be(offset + 0x04,sf);
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break;
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case 0x534e4453: /* "SNDS" */
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switch (read_u32be(offset + 0x10,sf)) {
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case 0x53484452: /* SHDR */
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found_shdr = 1;
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shdr_offset = offset + 0x10;
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break;
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default:
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break;
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}
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break;
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case 0x53484452: /* "SHDR" */
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switch (read_u32be(offset + 0x7C, sf)) {
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case 0x4354524C: /* "CTRL" */
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/* to distinguish between styles */
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ctrl_size = read_u32be(offset + 0x80, sf);
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break;
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default:
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break;
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}
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break;
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default: /* ignore others */
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break;
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}
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offset += size;
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}
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}
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if (!found_shdr)
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goto fail;
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channels = read_u32be(shdr_offset+0x20,sf);
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loop_flag = 0;
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channels, loop_flag);
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if (!vgmstream) goto fail;
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vgmstream->meta_type = meta_STR_SNDS;
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vgmstream->sample_rate = read_u32be(shdr_offset+0x1c,sf);
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if (ctrl_size == 0x1C || ctrl_size == 0x0B || ctrl_size == -1) {
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vgmstream->num_samples = read_u32be(shdr_offset+0x2c,sf) - 1; /* sample count? */
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}
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else {
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vgmstream->num_samples = read_u32be(shdr_offset+0x2c,sf) * 0x10; /* frame count? */
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}
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vgmstream->num_samples /= vgmstream->channels;
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switch (read_u32be(shdr_offset + 0x24,sf)) {
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case 0x53445832: /* "SDX2" */
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if (channels > 1) {
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vgmstream->coding_type = coding_SDX2_int;
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vgmstream->interleave_block_size = 1;
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} else {
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vgmstream->coding_type = coding_SDX2;
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}
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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->layout_type = layout_blocked_str_snds;
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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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