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AI automatically translates all comments in the code into English (#3917)

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alex
2024-09-19 14:53:50 +08:00
committed by GitHub
parent 046de691cb
commit 4152dcd409
279 changed files with 10602 additions and 3038 deletions
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45
ext-codec/AACRtp.cpp
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@@ -47,7 +47,8 @@ AACRtpDecoder::AACRtpDecoder() {
}
void AACRtpDecoder::obtainFrame() {
//从缓存池重新申请对象，防止覆盖已经写入环形缓存的对象
// 从缓存池重新申请对象，防止覆盖已经写入环形缓存的对象 [AUTO-TRANSLATED:f85fe201]
// Re-apply the object from the cache pool to prevent overwriting the object that has been written to the ring buffer
_frame = FrameImp::create();
_frame->_codec_id = CodecAAC;
}
@@ -55,45 +56,56 @@ void AACRtpDecoder::obtainFrame() {
bool AACRtpDecoder::inputRtp(const RtpPacket::Ptr &rtp, bool key_pos) {
auto payload_size = rtp->getPayloadSize();
if (payload_size <= 0) {
// 无实际负载
// 无实际负载 [AUTO-TRANSLATED:2267e6ac]
// No actual load
return false;
}
auto stamp = rtp->getStampMS();
// rtp数据开始部分
// rtp数据开始部分 [AUTO-TRANSLATED:f22ebdb9]
// Start of rtp data
auto ptr = rtp->getPayload();
// rtp数据末尾
// rtp数据末尾 [AUTO-TRANSLATED:ee108f2b]
// End of rtp data
auto end = ptr + payload_size;
// 首2字节表示Au-Header的个数，单位bit，所以除以16得到Au-Header个数
// 首2字节表示Au-Header的个数，单位bit，所以除以16得到Au-Header个数 [AUTO-TRANSLATED:c7175051]
// The first 2 bytes represent the number of Au-Headers, in bits, so divide by 16 to get the number of Au-Headers
auto au_header_count = ((ptr[0] << 8) | ptr[1]) >> 4;
if (!au_header_count) {
// 问题issue: https://github.com/ZLMediaKit/ZLMediaKit/issues/1869
// 问题issue: https://github.com/ZLMediaKit/ZLMediaKit/issues/1869 [AUTO-TRANSLATED:14be1ff8]
// Issue: https://github.com/ZLMediaKit/ZLMediaKit/issues/1869
WarnL << "invalid aac rtp au_header_count";
return false;
}
// 记录au_header起始指针
// 记录au_header起始指针 [AUTO-TRANSLATED:b9083b72]
// Record the starting pointer of au_header
auto au_header_ptr = ptr + 2;
ptr = au_header_ptr + au_header_count * 2;
if (end < ptr) {
// 数据不够
// 数据不够 [AUTO-TRANSLATED:830a2785]
// Not enough data
return false;
}
if (!_last_dts) {
// 记录第一个时间戳
// 记录第一个时间戳 [AUTO-TRANSLATED:2e85b398]
// Record the first timestamp
_last_dts = stamp;
}
// 每个audio unit时间戳增量
// 每个audio unit时间戳增量 [AUTO-TRANSLATED:0345240c]
// Timestamp increment for each audio unit
auto dts_inc = static_cast<int64_t>(stamp - _last_dts) / au_header_count;
if (dts_inc < 0 || dts_inc > 100) {
// 时间戳增量异常，忽略
// 时间戳增量异常，忽略 [AUTO-TRANSLATED:d2750ef8]
// Timestamp increment anomaly, ignore
dts_inc = 0;
}
for (auto i = 0u; i < (size_t)au_header_count; ++i) {
// 之后的2字节是AU_HEADER,其中高13位表示一帧AAC负载的字节长度，低3位无用
// 之后的2字节是AU_HEADER,其中高13位表示一帧AAC负载的字节长度，低3位无用 [AUTO-TRANSLATED:404eb444]
// The following 2 bytes are AU_HEADER, where the high 13 bits represent the byte length of one frame of AAC payload, and the low 3 bits are useless
auto size = ((au_header_ptr[0] << 8) | au_header_ptr[1]) >> 3;
auto len = std::min<int>(size, end - ptr);
if (len <= 0) {
@@ -104,12 +116,14 @@ bool AACRtpDecoder::inputRtp(const RtpPacket::Ptr &rtp, bool key_pos) {
au_header_ptr += 2;
if (_frame->size() >= (size_t)size) {
// 设置当前audio unit时间戳
// 设置当前audio unit时间戳 [AUTO-TRANSLATED:eee18d6e]
// Set the current audio unit timestamp
_frame->_dts = _last_dts + i * dts_inc;
flushData();
}
}
// 记录上次时间戳
// 记录上次时间戳 [AUTO-TRANSLATED:a830d69f]
// Record the last timestamp
_last_dts = stamp;
return false;
}
@@ -117,7 +131,8 @@ bool AACRtpDecoder::inputRtp(const RtpPacket::Ptr &rtp, bool key_pos) {
void AACRtpDecoder::flushData() {
auto ptr = reinterpret_cast<const uint8_t *>(_frame->data());
if ((ptr[0] == 0xFF && (ptr[1] & 0xF0) == 0xF0) && _frame->size() > ADTS_HEADER_LEN) {
// adts头打入了rtp包，不符合规范，兼容EasyPusher的bug
// adts头打入了rtp包，不符合规范，兼容EasyPusher的bug [AUTO-TRANSLATED:203a5ee9]
// The adts header is inserted into the rtp packet, which is not compliant with the specification, compatible with the bug of EasyPusher
_frame->_prefix_size = ADTS_HEADER_LEN;
}
RtpCodec::inputFrame(_frame);