mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-27 05:38:31 +08:00
58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
#include "G711Rtp.h"
|
|
|
|
namespace mediakit {
|
|
|
|
G711RtpEncoder::G711RtpEncoder(CodecId codec, uint32_t channels){
|
|
_cache_frame = FrameImp::create();
|
|
_cache_frame->_codec_id = codec;
|
|
_channels = channels;
|
|
}
|
|
|
|
void G711RtpEncoder::setOpt(int opt, const toolkit::Any ¶m) {
|
|
if (opt == RTP_ENCODER_PKT_DUR_MS) {
|
|
if (param.is<uint32_t>()) {
|
|
auto dur = param.get<uint32_t>();
|
|
if (dur < 20 || dur > 180) {
|
|
WarnL << "set g711 rtp encoder duration ms failed for " << dur;
|
|
return;
|
|
}
|
|
// 向上 20ms 取整
|
|
_pkt_dur_ms = (dur + 19) / 20 * 20;
|
|
}
|
|
}
|
|
}
|
|
|
|
bool G711RtpEncoder::inputFrame(const Frame::Ptr &frame) {
|
|
auto dur = (_cache_frame->size() - _cache_frame->prefixSize()) / (8 * _channels);
|
|
auto next_pts = _cache_frame->pts() + dur;
|
|
if (next_pts == 0) {
|
|
_cache_frame->_pts = frame->pts();
|
|
} else {
|
|
if ((next_pts + _pkt_dur_ms) < frame->pts()) { // 有丢包超过20ms
|
|
_cache_frame->_pts = frame->pts() - dur;
|
|
}
|
|
}
|
|
_cache_frame->_buffer.append(frame->data() + frame->prefixSize(), frame->size() - frame->prefixSize());
|
|
|
|
auto stamp = _cache_frame->pts();
|
|
auto ptr = _cache_frame->data() + _cache_frame->prefixSize();
|
|
auto len = _cache_frame->size() - _cache_frame->prefixSize();
|
|
auto remain_size = len;
|
|
size_t max_size = 160 * _channels * _pkt_dur_ms / 20; // 20 ms per 160 byte
|
|
size_t n = 0;
|
|
bool mark = true;
|
|
while (remain_size >= max_size) {
|
|
assert(remain_size >= max_size);
|
|
const size_t rtp_size = max_size;
|
|
n++;
|
|
stamp += _pkt_dur_ms;
|
|
RtpCodec::inputRtp(getRtpInfo().makeRtp(TrackAudio, ptr, rtp_size, mark, stamp), false);
|
|
ptr += rtp_size;
|
|
remain_size -= rtp_size;
|
|
}
|
|
_cache_frame->_buffer.erase(0, n * max_size);
|
|
_cache_frame->_pts += (uint64_t)_pkt_dur_ms * n;
|
|
return len > 0;
|
|
}
|
|
|
|
} // namespace mediakit
|