mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-14 07:32:52 +01:00
76 lines
2.4 KiB
C
76 lines
2.4 KiB
C
#include "meta.h"
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#include "../util.h"
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#include "../coding/coding.h"
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/* VID1 - from Neversoft games (Gun, Tony Hawk's American Wasteland GC) */
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VGMSTREAM * init_vgmstream_ngc_vid1(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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off_t start_offset, header_offset, header_size;
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int loop_flag = 0, channel_count;
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/* check extension */
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if (!check_extensions(streamFile,"ogg,logg"))
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goto fail;
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/* chunked/blocked format containing video or audio frames */
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if (read_32bitBE(0x00,streamFile) != 0x56494431) /* "VID1" */
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goto fail;
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/* find actual header start/size in the chunks */
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{
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header_offset = read_32bitBE(0x04, streamFile);
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if (read_32bitBE(header_offset,streamFile) != 0x48454144) /* "HEAD" */
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goto fail;
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start_offset = header_offset + read_32bitBE(header_offset + 0x04, streamFile);
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header_offset += 0x0c;
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/* videos have VIDH before AUDH, and VIDD in blocks, but aren't parsed ATM */
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if (read_32bitBE(header_offset,streamFile) != 0x41554448) /* "AUDH" */
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goto fail;
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header_size = read_32bitBE(header_offset + 0x04, streamFile);
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header_offset += 0x0c;
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if (read_32bitBE(header_offset,streamFile) != 0x56415544) /* "VAUD" (Vorbis audio?) */
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goto fail;
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header_offset += 0x04;
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header_size -= 0x10;
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}
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channel_count = read_8bit(header_offset + 0x04,streamFile);
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/* other values unknown, maybe related to vorbis (ex. bitrate/encoding modes) */
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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->sample_rate = read_32bitBE(header_offset + 0x00, streamFile);
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vgmstream->num_samples = read_32bitBE(header_offset + 0x1c, streamFile);
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vgmstream->meta_type = meta_NGC_VID1;
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#ifdef VGM_USE_VORBIS
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{
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vorbis_custom_config cfg = {0};
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vgmstream->layout_type = layout_none;
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vgmstream->coding_type = coding_VORBIS_custom;
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vgmstream->codec_data = init_vorbis_custom(streamFile, header_offset + 0x20, VORBIS_VID1, &cfg);
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if (!vgmstream->codec_data) goto fail;
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}
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#else
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goto fail;
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#endif
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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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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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