88 lines
2.9 KiB
C
88 lines
2.9 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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#include "xavs_streamfile.h"
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/* XAVS - Reflections audio and video+audio container [Stuntman (PS2)] */
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VGMSTREAM * init_vgmstream_xavs(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;
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int total_subsongs, target_subsong = streamFile->stream_index;
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STREAMFILE *temp_streamFile = NULL;
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/* checks */
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if (!check_extensions(streamFile, "xav"))
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goto fail;
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if (read_32bitBE(0x00, streamFile) != 0x58415653) /* "XAVS" */
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goto fail;
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loop_flag = 0;
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channel_count = 2;
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start_offset = 0x00;
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/* 0x04: 16b width + height (0 if file has no video) */
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/* 0x08: related to video (0 if file has no video) */
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total_subsongs = read_16bitLE(0x0c, streamFile);
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/* 0x0c: volume? (0x50, 0x4e) */
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/* 0x10: biggest video chunk? (0 if file has no video) */
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/* 0x14: biggest audio chunk? */
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if (target_subsong == 0) target_subsong = 1;
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if (target_subsong > total_subsongs || total_subsongs <= 0) goto fail;
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/* could use a blocked layout, but this needs interleaved PCM within blocks which can't be done ATM */
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temp_streamFile = setup_xavs_streamfile(streamFile, 0x18, target_subsong - 1);
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if (!temp_streamFile) 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->meta_type = meta_XAVS;
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vgmstream->num_streams = total_subsongs;
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vgmstream->coding_type = coding_PCM16LE;
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vgmstream->layout_type = layout_interleave;
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/* no apparent flags, most videos use 0x41 but not all */
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{
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off_t offset = 0x18;
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while (offset < get_streamfile_size(streamFile)) {
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uint32_t chunk_id = read_32bitLE(offset+0x00, streamFile) & 0xFF;
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uint32_t chunk_size = read_32bitLE(offset+0x00, streamFile) >> 8;
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if ((chunk_id & 0xF0) == 0x40) {
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vgmstream->sample_rate = 48000;
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vgmstream->interleave_block_size = 0x200;
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break;
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} else if ((chunk_id & 0xF0) == 0x60) {
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vgmstream->sample_rate = 24000;
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vgmstream->interleave_block_size = 0x100;
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break;
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} else if (chunk_id == 0x56) {
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offset += 0x04 + chunk_size;
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} else if (chunk_id == 0x21) {
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offset += 0x04;
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} else {
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goto fail;
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}
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}
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}
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vgmstream->num_samples = pcm_bytes_to_samples(get_streamfile_size(temp_streamFile), channel_count, 16);
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if (!vgmstream_open_stream(vgmstream,temp_streamFile,start_offset))
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goto fail;
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close_streamfile(temp_streamFile);
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return vgmstream;
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fail:
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close_streamfile(temp_streamFile);
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close_vgmstream(vgmstream);
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return NULL;
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}
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