81 lines
2.6 KiB
C
81 lines
2.6 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* BNK - sfx container from Relic's earlier games [Homeworld (PC), Homeworld Cataclysm (PC)] */
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VGMSTREAM* init_vgmstream_bnk_relic(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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uint32_t start_offset, offset, data_size, loop_start, loop_end;
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int loop_flag, channels, bitrate, internal_rate, sample_rate;
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int total_subsongs, target_subsong = sf->stream_index;
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/* checks */
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if (!check_extensions(sf, "bnk"))
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goto fail;
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if (!is_id32be(0x00,sf, "BNK0"))
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goto fail;
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/* 0x04: flags? */
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total_subsongs = read_u32le(0x08,sf);
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if (target_subsong == 0) target_subsong = 1;
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if (target_subsong < 0 || target_subsong > total_subsongs || total_subsongs < 1) goto fail;
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offset = 0x0c + (target_subsong-1) * 0x38;
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if (!is_id32be(offset + 0x00,sf, "PCH0"))
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goto fail;
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/* 0x04: null */
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/* 0x08: 0/+-number? */
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start_offset = read_u32le(offset + 0x0c,sf);
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data_size = read_u32le(offset + 0x10,sf);
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loop_start = read_u32le(offset + 0x14,sf); /* 0x14: 0/offset? */
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loop_end = read_u32le(offset + 0x18,sf); /* 0x18: 0/offset? */
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bitrate = read_u16le(offset + 0x1c,sf);
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loop_flag = read_u16le(offset + 0x1e,sf);
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/* 0x20: volume? */
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/* 0x22: -1 */
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/* 0x24: fmt pcm codec 1 */
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channels = read_u16le(offset + 0x26,sf);
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sample_rate = read_u32le(offset + 0x28,sf);
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/* 0x2c: bitrate */
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/* 0x30: pcm block size */
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/* 0x32: pcm bps */
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/* 0x34: 0 */
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/* 0x36: -1 */
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internal_rate = 44100;
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loop_flag = 0; //todo clicks on loop, wrong calcs?
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/* stream info */
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if (!is_id32be(start_offset - 0x04,sf, "DATA"))
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goto fail;
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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_BNK_RELIC;
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vgmstream->sample_rate = sample_rate;
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vgmstream->num_samples = relic_bytes_to_samples(data_size, channels, bitrate);
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vgmstream->loop_start_sample = relic_bytes_to_samples(loop_start, channels, bitrate);
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vgmstream->loop_end_sample = relic_bytes_to_samples(loop_end, channels, bitrate);
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vgmstream->num_streams = total_subsongs;
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vgmstream->stream_size = data_size;
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vgmstream->codec_data = init_relic(channels, bitrate, internal_rate);
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if (!vgmstream->codec_data) goto fail;
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vgmstream->coding_type = coding_RELIC;
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vgmstream->layout_type = layout_none;
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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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