mirror of
https://github.com/vgmstream/vgmstream.git
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129 lines
4.9 KiB
C
129 lines
4.9 KiB
C
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#include "meta.h"
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#include "../util.h"
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/* SXD - Sony's SDK format? (cousin of SGXD) [Gravity Rush, Freedom Wars, Soul Sacrifice PSV] */
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VGMSTREAM * init_vgmstream_sxd(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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STREAMFILE * streamHeader = NULL;
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off_t start_offset, chunk_offset, first_offset = 0x60;
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int is_separate;
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int loop_flag, channels, type;
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int sample_rate, num_samples, loop_start_sample, loop_end_sample;
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int target_stream = 0, total_streams;
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/* check extension, case insensitive */
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/* .sxd: header+data (SXDF), .sxd1: header (SXDF) + .sxd2 = data (SXDS) */
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if (!check_extensions(streamFile,"sxd,sxd2")) goto fail;
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is_separate = !check_extensions(streamFile,"sxd");
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/* sxd1+sxd2: use sxd1 as header; otherwise use the current file as header */
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if (is_separate) {
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if (read_32bitBE(0x00,streamFile) != 0x53584453) /* "SXDS" */
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goto fail;
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streamHeader = open_stream_ext(streamFile, "sxd1");
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if (!streamHeader) goto fail;
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} else {
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streamHeader = streamFile;
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}
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if (read_32bitBE(0x00,streamHeader) != 0x53584446) /* "SXDF" */
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goto fail;
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/* typical chunks: NAME, WAVE and many control chunks (SXDs don't need to contain any sound data) */
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/* WAVE chunk (0 + streams + 4*streams table + streams * variable? + optional padding) */
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if (!find_chunk_le(streamHeader, 0x57415645,first_offset,0, &chunk_offset,NULL)) goto fail; /* "WAVE" */
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/* check multi-streams (usually only in SFX containers) */
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total_streams = read_32bitLE(chunk_offset+0x04,streamHeader);
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if (target_stream == 0) target_stream = 1;
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if (target_stream < 0 || target_stream > total_streams || total_streams < 1) goto fail;
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/* read stream header */
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{
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off_t table_offset, header_offset, stream_offset, data_offset;
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int i;
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/* get target offset using table of relative offsets within WAVE */
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table_offset = chunk_offset + 0x08 + 4*(target_stream-1);
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header_offset = table_offset + read_32bitLE(table_offset,streamHeader);
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type = read_32bitLE(header_offset+0x00,streamHeader);
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/* 0x04 (1): unk (HEVAG: 21, ATRAC9: 42 */
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channels = read_8bit (header_offset+0x05,streamHeader);
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sample_rate = read_32bitLE(header_offset+0x08,streamHeader);
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/* 0x0c (4): unk size? */
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/* 0x10 (4): ? + volume? + pan? (can be 0 for music) */
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num_samples = read_32bitLE(header_offset+0x14,streamHeader);
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loop_start_sample = read_32bitLE(header_offset+0x18,streamHeader);
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loop_end_sample = read_32bitLE(header_offset+0x1c,streamHeader);
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/* 0x20 (4): data size */
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/* 0x24 (-): extra data, variable size and format dependant
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(ATRAC9 can contain truncated part of the data, for preloading I guess) */
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loop_flag = loop_start_sample != -1 && loop_end_sample != -1;
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/* calc stream offset by reading stream sizes */
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stream_offset = 0;
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for (i = 0; i < total_streams; i++) {
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off_t subtable_offset, subheader_offset;
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if (i == target_stream-1) break;
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subtable_offset = chunk_offset + 0x08 + 4*(i);
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subheader_offset = subtable_offset + read_32bitLE(subtable_offset,streamHeader);
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stream_offset += read_32bitLE(subheader_offset+0x20,streamHeader); /* data size */
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}
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if (is_separate) {
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data_offset = first_offset;
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} else {
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if (!find_chunk_le(streamHeader, 0x44415441,first_offset,0, &data_offset,NULL)) goto fail; /* "DATA" */
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data_offset += 0x08;
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}
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start_offset = data_offset + stream_offset;
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}
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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->sample_rate = sample_rate;
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vgmstream->num_samples = num_samples;
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vgmstream->loop_start_sample = loop_start_sample;
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vgmstream->loop_end_sample = loop_end_sample;
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vgmstream->num_streams = total_streams;
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vgmstream->meta_type = meta_SXD;
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switch (type) {
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case 0x01: /* HEVAG */
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vgmstream->coding_type = coding_HEVAG;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = 0x10;
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break;
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case 0x03: /* ATRAC9 */
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goto fail;
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default:
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VGM_LOG("SXD: unknown codec %i", type);
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goto fail;
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}
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/* open the file for reading */
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if (!vgmstream_open_stream(vgmstream,streamFile,start_offset))
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goto fail;
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if (is_separate && streamHeader) close_streamfile(streamHeader);
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return vgmstream;
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fail:
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if (is_separate && streamHeader) close_streamfile(streamHeader);
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close_vgmstream(vgmstream);
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return NULL;
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}
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