mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-19 18:05:52 +01:00
115 lines
3.8 KiB
C
115 lines
3.8 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 *streamFile) {
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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, channel_count, found_shdr = 0;
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size_t file_size, ctrl_size = -1;
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/* checks */
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if (!check_extensions(streamFile, "str"))
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goto fail;
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if (read_32bitBE(0x00,streamFile) != 0x4354524c && /* "CTRL" */
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read_32bitBE(0x00,streamFile) != 0x534e4453 && /* "SNDS" */
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read_32bitBE(0x00,streamFile) != 0x53484452) /* "SHDR" */
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goto fail;
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file_size = get_streamfile_size(streamFile);
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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 current_chunk = 0;
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while (!found_shdr && current_chunk < file_size) {
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if (current_chunk < 0) goto fail;
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if (current_chunk+read_32bitBE(current_chunk+0x04,streamFile) >= file_size)
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goto fail;
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switch (read_32bitBE(current_chunk,streamFile)) {
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case 0x4354524C: /* "CTRL" */
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ctrl_size = read_32bitBE(current_chunk+4,streamFile);
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break;
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case 0x534e4453: /* "SNDS" */
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switch (read_32bitBE(current_chunk+16,streamFile)) {
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case 0x53484452: /* SHDR */
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found_shdr = 1;
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shdr_offset = current_chunk+16;
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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_32bitBE(current_chunk+0x7C, streamFile)) {
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case 0x4354524C: /* "CTRL" */
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/* to distinguish between styles */
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ctrl_size = read_32bitBE(current_chunk + 0x80, streamFile);
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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:
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/* ignore others for now */
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break;
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}
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current_chunk += read_32bitBE(current_chunk+0x04,streamFile);
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}
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}
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if (!found_shdr) goto fail;
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channel_count = read_32bitBE(shdr_offset+0x20,streamFile);
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loop_flag = 0;
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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_STR_SNDS;
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vgmstream->sample_rate = read_32bitBE(shdr_offset+0x1c,streamFile);
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if (ctrl_size == 0x1C || ctrl_size == 0x0B || ctrl_size == -1) {
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vgmstream->num_samples = read_32bitBE(shdr_offset+0x2c,streamFile) - 1; /* sample count? */
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}
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else {
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vgmstream->num_samples = read_32bitBE(shdr_offset+0x2c,streamFile) * 0x10; /* frame count? */
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}
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vgmstream->num_samples /= vgmstream->channels;
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switch (read_32bitBE(shdr_offset+0x24,streamFile)) {
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case 0x53445832: /* "SDX2" */
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if (channel_count > 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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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,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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