LGram16
e067522598
Game client codebase including: - CharacterActionControl: Character and creature management - GlobalScript: Network, items, skills, quests, utilities - RYLClient: Main client application with GUI and event handlers - Engine: 3D rendering engine (RYLGL) - MemoryManager: Custom memory allocation - Library: Third-party dependencies (DirectX, boost, etc.) - Tools: Development utilities 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
138 lines
3.4 KiB
C++
138 lines
3.4 KiB
C++
//------------------------------------------------------------------------------
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// File: State.cpp
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//
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// Desc: DirectShow sample code - implementation of CStreamState class.
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//
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// Copyright (c) 2000-2001 Microsoft Corporation. All rights reserved.
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//------------------------------------------------------------------------------
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#include "stdafx.h"
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#include <limits.h> // _I64_MAX
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#include <crtdbg.h>
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#include <dmo.h>
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#include "state.h"
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void CStreamState::TimeStamp(REFERENCE_TIME rt)
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{
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DWORD dwIndex = m_cbBytes >= 4 ? 0 : m_cbBytes;
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m_arTS[dwIndex].bValid = true;
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m_arTS[dwIndex].rt = rt;
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}
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void CStreamState::Reset()
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{
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m_cbBytes = 0;
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m_dwNextTimeCode = 0;
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for (int i = 0; i < 4; i++) {
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m_arTS[i].bValid = false;
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}
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}
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bool CStreamState::NextByte(BYTE bData)
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{
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_ASSERTE(m_arTS[0].bValid);
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switch (m_cbBytes) {
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case 0:
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if (bData == 0) {
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m_cbBytes++;
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}
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return false;
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case 1:
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if (bData == 0) {
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m_cbBytes++;
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} else {
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m_cbBytes = 0;
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// Pick up new timestamp if there was one
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if (m_arTS[1].bValid) {
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m_arTS[0].rt = m_arTS[1].rt;
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m_arTS[1].bValid = false;
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}
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}
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return false;
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case 2:
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if (bData == 1) {
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m_cbBytes++;
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} else {
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if (bData == 0) {
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if (m_arTS[1].bValid) {
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m_arTS[0].rt = m_arTS[1].rt;
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m_arTS[1].bValid = false;
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}
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if (m_arTS[2].bValid) {
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m_arTS[1] = m_arTS[2];
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m_arTS[2].bValid = false;
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}
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} else {
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// Not 0 or 1, revert
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m_cbBytes = 0;
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// and pick up latest timestamp
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if (m_arTS[1].bValid) {
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m_arTS[0].rt = m_arTS[1].rt;
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m_arTS[1].bValid = false;
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}
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if (m_arTS[2].bValid) {
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m_arTS[0].rt = m_arTS[2].rt;
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m_arTS[2].bValid = false;
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}
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}
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}
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return false;
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case 3:
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{
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// It's a start code whatever it is
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// return the timestamp and reset everything
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m_rt = m_arTS[0].rt;
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// If it's a picture start code can't use this timestamp again.
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if (0 == bData) {
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m_arTS[0].rt = INVALID_TIME;
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m_cbBytes = 0;
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}
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// Catch up and clean out timestamps
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for (int i = 1; i < 4; i++) {
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if (m_arTS[i].bValid) {
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m_arTS[0].rt = m_arTS[i].rt;
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m_arTS[i].bValid = false;
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}
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}
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// Picture start code?
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if (0 == bData) {
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m_cbBytes = 0;
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m_dwTimeCode = m_dwNextTimeCode;
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m_dwNextTimeCode++;
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return true;
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} else {
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// Is it a GOP start code?
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if (bData == 0xb8) {
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m_cbBytes++;
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} else {
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m_cbBytes = 0;
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}
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return false;
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}
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}
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case 4:
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case 5:
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case 6:
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case 7:
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m_bGOPData[m_cbBytes - 4] = bData;
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m_cbBytes++;
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if (m_cbBytes == 8) {
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m_cbBytes = 0;
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m_dwNextTimeCode = ((DWORD)m_bGOPData[0] << 17) +
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((DWORD)m_bGOPData[1] << 9) +
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((DWORD)m_bGOPData[2] << 1) +
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((DWORD)m_bGOPData[3] >> 7);
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}
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return false;
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}
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// Should never reach here
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return false;
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};
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