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Feature: Implement H.264 and AV1 hardware encoding for remote control

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Remark: Need to update FFmpeg static libraries to take effort
This commit is contained in:
yuanyuanxiang
2026-05-28 11:41:33 +02:00
parent d1aa7a2c02
commit 8c7f612449
30 changed files with 2113 additions and 68 deletions
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110
server/2015Remote/ScreenSpyDlg.cpp
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@@ -43,6 +43,66 @@ IMPLEMENT_DYNAMIC(CScreenSpyDlg, CDialog)
#define TIMER_ID 132
// H.264 Annex B keyframe 探测：扫描 start code (00 00 01 / 00 00 00 01)，
// 取后续 NAL header low 5 bits，命中 5 (IDR) / 7 (SPS) / 8 (PPS) 即认定为关键帧。
static bool IsH264Keyframe(const uint8_t* data, size_t len)
{
for (size_t i = 0; i + 4 < len; ++i) {
size_t nalOffset = 0;
if (data[i] == 0 && data[i+1] == 0 && data[i+2] == 0 && data[i+3] == 1) {
nalOffset = i + 4;
} else if (data[i] == 0 && data[i+1] == 0 && data[i+2] == 1) {
nalOffset = i + 3;
} else {
continue;
}
if (nalOffset >= len) continue;
uint8_t nalType = data[nalOffset] & 0x1F;
if (nalType == 5 || nalType == 7 || nalType == 8) return true;
}
return false;
}
// AV1 OBU keyframe 探测：扫描 OBU 链，遇到 OBU_SEQUENCE_HEADER (type 1) 即认定为关键帧。
// FFmpeg AV1 编码器在每个 IDR 前必定插入 SEQ HDR，因此该判定与 H.264 NAL 5/7/8 语义对齐。
static bool IsAv1Keyframe(const uint8_t* data, size_t len)
{
size_t pos = 0;
while (pos < len) {
uint8_t hdr = data[pos];
uint8_t obu_type = (hdr >> 3) & 0x0F;
bool has_ext = (hdr & 0x04) != 0;
bool has_size = (hdr & 0x02) != 0;
if (obu_type == 1 /*OBU_SEQUENCE_HEADER*/) return true;
pos++;
if (has_ext) {
if (pos >= len) return false;
pos++;
}
if (!has_size) return false; // 无 size 字段：OBU 占满到包尾，无法继续解析
// LEB128 size
uint64_t sz = 0;
for (int i = 0; i < 8; ++i) {
if (pos >= len) return false;
uint8_t b = data[pos++];
sz |= (uint64_t)(b & 0x7F) << (7 * i);
if ((b & 0x80) == 0) break;
}
if (pos + sz > len) return false;
pos += (size_t)sz;
}
return false;
}
// 首字节嗅探：H.264 Annex B 首字节恒为 0x00（起始码）；AV1 OBU header 首字节
// bit7=0、bits[3:6]=obu_type 1-15，典型值 0x08-0x78，绝不为 0x00。
// 一字节即可干净区分两套码流，无需协议字段或编码端协商。
static bool IsAnyKeyframe(const uint8_t* data, size_t len)
{
if (len == 0) return false;
return data[0] == 0x00 ? IsH264Keyframe(data, len) : IsAv1Keyframe(data, len);
}
// 静态成员变量定义
int CScreenSpyDlg::s_nFastStretch = -1; // -1 表示未初始化
@@ -675,6 +735,12 @@ BOOL CScreenSpyDlg::OnInitDialog()
// 音频菜单项
SysMenu->AppendMenuL(MF_STRING, IDM_AUDIO_TOGGLE, "系统音频(&U)");
SysMenu->CheckMenuItem(IDM_AUDIO_TOGGLE, m_Settings.AudioEnabled ? MF_CHECKED : MF_UNCHECKED);
SysMenu->AppendMenuL(MF_STRING, IDM_ENABLE_H264_HARD, "启用 H264 硬编码");
SysMenu->CheckMenuItem(IDM_ENABLE_H264_HARD, m_Settings.EncodeLevel == LEVEL_H264_HARD ? MF_CHECKED : MF_UNCHECKED);
SysMenu->EnableMenuItem(IDM_ENABLE_H264_HARD, m_Settings.EncodeLevel == LEVEL_AV1_HARD ? MF_GRAYED : MF_ENABLED);
SysMenu->AppendMenuL(MF_STRING, IDM_ENABLE_AV1_HARD, "启用 AV1 硬编码");
SysMenu->CheckMenuItem(IDM_ENABLE_AV1_HARD, m_Settings.EncodeLevel == LEVEL_AV1_HARD ? MF_CHECKED : MF_UNCHECKED);
SysMenu->EnableMenuItem(IDM_ENABLE_AV1_HARD, m_Settings.EncodeLevel == LEVEL_H264_HARD ? MF_GRAYED : MF_ENABLED);
// 初始化勾选状态
UpdateQualityMenuCheck(SysMenu);
@@ -1410,27 +1476,11 @@ VOID CScreenSpyDlg::DrawNextScreenDiff(bool keyFrame)
bChange = TRUE;
}
}
// Broadcast H264 frame to web clients (only for Web session dialogs)
// Format: [DeviceID:4][FrameType:1][DataLen:4][H264Data:N]
// Broadcast video frame to web clients (only for Web session dialogs)
// Format: [DeviceID:4][FrameType:1][DataLen:4][VideoData:N]
// 浏览器侧按首字节嗅探区分 H.264 / AV1，因此 packet 内不需要 codec 字段。
if (m_bIsWebSession && NextScreenLength > 0 && WebService().IsRunning()) {
// Detect H264 keyframe by checking NAL unit type
// NAL type 5 = IDR slice (keyframe), NAL type 7 = SPS, NAL type 8 = PPS
bool isKeyFrame = false;
LPBYTE h264Data = (LPBYTE)NextScreenData;
for (ULONG i = 0; i + 4 < NextScreenLength; i++) {
// Look for start code: 0x00 0x00 0x00 0x01 or 0x00 0x00 0x01
if ((h264Data[i] == 0 && h264Data[i+1] == 0 && h264Data[i+2] == 0 && h264Data[i+3] == 1) ||
(h264Data[i] == 0 && h264Data[i+1] == 0 && h264Data[i+2] == 1)) {
int nalOffset = (h264Data[i+2] == 1) ? i + 3 : i + 4;
if (nalOffset < (int)NextScreenLength) {
int nalType = h264Data[nalOffset] & 0x1F;
if (nalType == 5 || nalType == 7 || nalType == 8) {
isKeyFrame = true;
break;
}
}
}
}
bool isKeyFrame = IsAnyKeyframe((const uint8_t*)NextScreenData, NextScreenLength);
std::vector<uint8_t> packet(4 + 1 + 4 + NextScreenLength);
uint32_t deviceIdLow = (uint32_t)(m_ClientID & 0xFFFFFFFF);
@@ -2134,6 +2184,26 @@ void CScreenSpyDlg::OnSysCommand(UINT nID, LPARAM lParam)
}
break;
}
case IDM_ENABLE_H264_HARD: {
m_Settings.EncodeLevel = m_Settings.EncodeLevel ? LEVEL_H264_SOFT : LEVEL_H264_HARD;
SysMenu->CheckMenuItem(IDM_ENABLE_H264_HARD, m_Settings.EncodeLevel == LEVEL_H264_HARD ? MF_CHECKED : MF_UNCHECKED);
SysMenu->CheckMenuItem(IDM_ENABLE_AV1_HARD, m_Settings.EncodeLevel == LEVEL_AV1_HARD ? MF_CHECKED : MF_UNCHECKED);
SysMenu->EnableMenuItem(IDM_ENABLE_H264_HARD, m_Settings.EncodeLevel == LEVEL_AV1_HARD ? MF_GRAYED : MF_ENABLED);
SysMenu->EnableMenuItem(IDM_ENABLE_AV1_HARD, m_Settings.EncodeLevel == LEVEL_H264_HARD ? MF_GRAYED : MF_ENABLED);
BYTE bToken[] = {COMMAND_ENCODE_LEVEL, m_Settings.EncodeLevel };
m_ContextObject->Send2Client(bToken, sizeof(bToken));
break;
}
case IDM_ENABLE_AV1_HARD: {
m_Settings.EncodeLevel = m_Settings.EncodeLevel ? LEVEL_H264_SOFT : LEVEL_AV1_HARD;
SysMenu->CheckMenuItem(IDM_ENABLE_H264_HARD, m_Settings.EncodeLevel == LEVEL_H264_HARD ? MF_CHECKED : MF_UNCHECKED);
SysMenu->CheckMenuItem(IDM_ENABLE_AV1_HARD, m_Settings.EncodeLevel == LEVEL_AV1_HARD ? MF_CHECKED : MF_UNCHECKED);
SysMenu->EnableMenuItem(IDM_ENABLE_H264_HARD, m_Settings.EncodeLevel == LEVEL_AV1_HARD ? MF_GRAYED : MF_ENABLED);
SysMenu->EnableMenuItem(IDM_ENABLE_AV1_HARD, m_Settings.EncodeLevel == LEVEL_H264_HARD ? MF_GRAYED : MF_ENABLED);
BYTE bToken[] = { COMMAND_ENCODE_LEVEL, m_Settings.EncodeLevel };
m_ContextObject->Send2Client(bToken, sizeof(bToken));
break;
}
}
__super::OnSysCommand(nID, lParam);