48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2015 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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// This file contains some functions used to help parse XMA data.
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#ifndef XENIA_APU_XMA_HELPERS_H_
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#define XENIA_APU_XMA_HELPERS_H_
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#include <stdint.h>
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namespace xe {
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namespace apu {
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namespace xma {
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// Get number of frames that /begin/ in this packet.
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uint32_t GetPacketFrameCount(uint8_t* packet) {
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return (uint8_t)(packet[0] >> 2);
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}
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// Get the first frame offset in bits
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uint32_t GetPacketFrameOffset(uint8_t* packet) {
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uint32_t val = (uint16_t)(((packet[0] & 0x3) << 13) | (packet[1] << 5) |
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(packet[2] >> 3));
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if (val == 0x7FFF) {
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return -1;
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} else {
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return val + 32;
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}
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}
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uint32_t GetPacketMetadata(uint8_t* packet) {
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return (uint8_t)(packet[2] & 0x7);
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}
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uint32_t GetPacketSkipCount(uint8_t* packet) { return (uint8_t)(packet[3]); }
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} // namespace xma
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} // namespace apu
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} // namespace xe
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#endif // XENIA_APU_XMA_HELPERS_H_
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