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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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38
ext-codec/AAC.cpp
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@@ -37,14 +37,18 @@ public:
unsigned int channel_configuration; // 3 uimsbf 表示声道数
unsigned int original; // 1 bslbf
unsigned int home; // 1 bslbf
// 下面的为改变的参数即每一帧都不同
// 下面的为改变的参数即每一帧都不同 [AUTO-TRANSLATED:481aa349]
// The following are the parameters that change in each frame
unsigned int copyright_identification_bit; // 1 bslbf
unsigned int copyright_identification_start; // 1 bslbf
unsigned int aac_frame_length; // 13 bslbf 一个ADTS帧的长度包括ADTS头和raw data block
unsigned int adts_buffer_fullness; // 11 bslbf 0x7FF 说明是码率可变的码流
// no_raw_data_blocks_in_frame 表示ADTS帧中有number_of_raw_data_blocks_in_frame + 1个AAC原始帧.
// 所以说number_of_raw_data_blocks_in_frame == 0
// 表示说ADTS帧中有一个AAC数据块并不是说没有。(一个AAC原始帧包含一段时间内1024个采样及相关数据)
// no_raw_data_blocks_in_frame 表示ADTS帧中有number_of_raw_data_blocks_in_frame + 1个AAC原始帧. [AUTO-TRANSLATED:3e975531]
// no_raw_data_blocks_in_frame indicates that there are number_of_raw_data_blocks_in_frame + 1 AAC raw frames in the ADTS frame.
// 所以说number_of_raw_data_blocks_in_frame == 0 [AUTO-TRANSLATED:1b8e9697]
// So number_of_raw_data_blocks_in_frame == 0
// 表示说ADTS帧中有一个AAC数据块并不是说没有。(一个AAC原始帧包含一段时间内1024个采样及相关数据) [AUTO-TRANSLATED:4a09d783]
// means that there is one AAC data block in the ADTS frame, not that there is none. (An AAC raw frame contains 1024 samples and related data over a period of time)
unsigned int no_raw_data_blocks_in_frame; // 2 uimsfb
};
@@ -203,6 +207,9 @@ bool parseAacConfig(const string &config, int &samplerate, int &channels) {
/**
* aac类型SDP
* aac type SDP
* [AUTO-TRANSLATED:c06f00b1]
*/
class AACSdp : public Sdp {
public:
@@ -213,6 +220,14 @@ public:
* @param sample_rate 音频采样率
* @param channels 通道数
* @param bitrate 比特率
* Constructor
* @param aac_cfg aac two-byte configuration description
* @param payload_type rtp payload type
* @param sample_rate audio sampling rate
* @param channels number of channels
* @param bitrate bitrate
* [AUTO-TRANSLATED:6fe1f3b2]
*/
AACSdp(const string &aac_cfg, int payload_type, int sample_rate, int channels, int bitrate)
: Sdp(sample_rate, payload_type) {
@@ -271,7 +286,8 @@ int AACTrack::getAudioChannel() const {
static Frame::Ptr addADTSHeader(const Frame::Ptr &frame_in, const std::string &aac_config) {
auto frame = FrameImp::create();
frame->_codec_id = CodecAAC;
// 生成adts头
// 生成adts头 [AUTO-TRANSLATED:c285b9b0]
// Generate adts header
char adts_header[32] = { 0 };
auto size = dumpAacConfig(aac_config, frame_in->size(), (uint8_t *)adts_header, sizeof(adts_header));
CHECK(size > 0, "Invalid adts config");
@@ -290,7 +306,8 @@ bool AACTrack::inputFrame(const Frame::Ptr &frame) {
}
bool ret = false;
//有adts头，尝试分帧
// 有adts头，尝试分帧 [AUTO-TRANSLATED:f691c4ce]
// There is an adts header, try to frame
int64_t dts = frame->dts();
int64_t pts = frame->pts();
@@ -322,13 +339,15 @@ bool AACTrack::inputFrame(const Frame::Ptr &frame) {
bool AACTrack::inputFrame_l(const Frame::Ptr &frame) {
if (_cfg.empty() && frame->prefixSize()) {
// 未获取到aac_cfg信息，根据7个字节的adts头生成aac config
// 未获取到aac_cfg信息，根据7个字节的adts头生成aac config [AUTO-TRANSLATED:1b80f562]
// Unable to get aac_cfg information, generate aac config based on the 7-byte adts header
_cfg = makeAacConfig((uint8_t *)(frame->data()), frame->prefixSize());
update();
}
if (frame->size() > frame->prefixSize()) {
// 除adts头外，有实际负载
// 除adts头外，有实际负载 [AUTO-TRANSLATED:5b7c088e]
// There is an actual payload besides the adts header
return AudioTrack::inputFrame(frame);
}
return false;
@@ -377,7 +396,8 @@ Track::Ptr getTrackBySdp(const SdpTrack::Ptr &track) {
aac_cfg_str = findSubString(track->_fmtp.data(), "config=", nullptr);
}
if (aac_cfg_str.empty()) {
// 如果sdp中获取不到aac config信息，那么在rtp也无法获取，那么忽略该Track
// 如果sdp中获取不到aac config信息，那么在rtp也无法获取，那么忽略该Track [AUTO-TRANSLATED:995bc20d]
// If aac config information cannot be obtained from sdp, then it cannot be obtained from rtp either, so ignore this Track
return nullptr;
}
string aac_cfg;