53 lines
1.5 KiB
C++
53 lines
1.5 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 2023 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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static constexpr uint32_t kMaxFrameLength = 0x7FFF;
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// Get number of frames that /begin/ in this packet. This is valid only for XMA2
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// packets
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static const uint8_t GetPacketFrameCount(const uint8_t* packet) {
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return packet[0] >> 2;
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}
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static const uint8_t GetPacketMetadata(const uint8_t* packet) {
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return packet[2] & 0x7;
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}
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static const bool IsPacketXma2Type(const uint8_t* packet) {
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return GetPacketMetadata(packet) == 1;
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}
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static const uint8_t GetPacketSkipCount(const uint8_t* packet) {
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return packet[3];
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}
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// Get the first frame offset in bits
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static uint32_t GetPacketFrameOffset(const 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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return val + 32;
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}
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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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