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精简H264Frame对象，删除多余字段

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This commit is contained in:
xiongziliang
2019-08-01 14:39:09 +08:00
parent 2e95c3b2fa
commit e13ae419ae
5 changed files with 25 additions and 31 deletions
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46
src/Extension/H264Rtp.cpp
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@@ -100,12 +100,10 @@ bool H264RtpDecoder::decodeRtp(const RtpPacket::Ptr &rtppack) {
//a full frame
_h264frame->buffer.assign("\x0\x0\x0\x1", 4);
_h264frame->buffer.append((char *)frame, length);
_h264frame->type = nal.type;
_h264frame->timeStamp = rtppack->timeStamp;
_h264frame->sequence = rtppack->sequence;
auto isIDR = _h264frame->type == H264Frame::NAL_IDR;
auto key = _h264frame->keyFrame();
onGetH264(_h264frame);
return (isIDR); //i frame
return (key); //i frame
}
switch (nal.type){
@@ -131,9 +129,7 @@ bool H264RtpDecoder::decodeRtp(const RtpPacket::Ptr &rtppack) {
MakeNalu(ptr[0], nal);
_h264frame->buffer.assign("\x0\x0\x0\x1", 4);
_h264frame->buffer.append((char *)ptr, len);
_h264frame->type = nal.type;
_h264frame->timeStamp = rtppack->timeStamp;
_h264frame->sequence = rtppack->sequence;
if(nal.type == H264Frame::NAL_IDR){
haveIDR = true;
}
@@ -148,35 +144,39 @@ bool H264RtpDecoder::decodeRtp(const RtpPacket::Ptr &rtppack) {
//FU-A
FU fu;
MakeFU(frame[1], fu);
if (fu.S == 1) {
//FU-A start
if (fu.S) {
//该帧的第一个rtp包
char tmp = (nal.forbidden_zero_bit << 7 | nal.nal_ref_idc << 5 | fu.type);
_h264frame->buffer.assign("\x0\x0\x0\x1", 4);
_h264frame->buffer.push_back(tmp);
_h264frame->buffer.append((char *)frame + 2, length - 2);
_h264frame->type = fu.type;
_h264frame->timeStamp = rtppack->timeStamp;
_h264frame->sequence = rtppack->sequence;
return (_h264frame->type == H264Frame::NAL_IDR); //i frame
//该函数return时，保存下当前sequence,以便下次对比seq是否连续
_lastSeq = rtppack->sequence;
return _h264frame->keyFrame();
}
if (rtppack->sequence != (uint16_t)(_h264frame->sequence + 1)) {
if (rtppack->sequence != _lastSeq + 1 && rtppack->sequence != 0) {
//中间的或末尾的rtp包，其seq必须连续(如果回环了则判定为连续)，否则说明rtp丢包，那么该帧不完整，必须得丢弃
_h264frame->buffer.clear();
WarnL << "丢包,帧废弃:" << rtppack->sequence << "," << _h264frame->sequence;
WarnL << "rtp sequence不连续: " << rtppack->sequence << " != " << _lastSeq << " + 1,该帧被废弃";
return false;
}
_h264frame->sequence = rtppack->sequence;
if (fu.E == 1) {
//FU-A end
if (!fu.E) {
//该帧的中间rtp包
_h264frame->buffer.append((char *)frame + 2, length - 2);
_h264frame->timeStamp = rtppack->timeStamp;
auto isIDR = _h264frame->type == H264Frame::NAL_IDR;
onGetH264(_h264frame);
return isIDR;
//该函数return时，保存下当前sequence,以便下次对比seq是否连续
_lastSeq = rtppack->sequence;
return false;
}
//FU-A mid
//该帧最后一个rtp包
_h264frame->buffer.append((char *)frame + 2, length - 2);
return false;
_h264frame->timeStamp = rtppack->timeStamp;
auto key = _h264frame->keyFrame();
onGetH264(_h264frame);
return key;
}
default:{
@@ -195,10 +195,8 @@ bool H264RtpDecoder::decodeRtp(const RtpPacket::Ptr &rtppack) {
void H264RtpDecoder::onGetH264(const H264Frame::Ptr &frame) {
//写入环形缓存
auto lastSeq = _h264frame->sequence;
RtpCodec::inputFrame(frame);
_h264frame = obtainFrame();
_h264frame->sequence = lastSeq;
}