mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-23 11:17:09 +08:00
58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
#include "G711Rtp.h"
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namespace mediakit {
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G711RtpEncoder::G711RtpEncoder(CodecId codec, uint32_t channels){
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_cache_frame = FrameImp::create();
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_cache_frame->_codec_id = codec;
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_channels = channels;
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}
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void G711RtpEncoder::setOpt(int opt, const toolkit::Any ¶m) {
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if (opt == RTP_ENCODER_PKT_DUR_MS) {
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if (param.is<uint32_t>()) {
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auto dur = param.get<uint32_t>();
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if (dur < 20 || dur > 180) {
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WarnL << "set g711 rtp encoder duration ms failed for " << dur;
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return;
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}
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// 向上 20ms 取整
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_pkt_dur_ms = (dur + 19) / 20 * 20;
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}
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}
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}
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bool G711RtpEncoder::inputFrame(const Frame::Ptr &frame) {
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auto dur = (_cache_frame->size() - _cache_frame->prefixSize()) / (8 * _channels);
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auto next_pts = _cache_frame->pts() + dur;
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if (next_pts == 0) {
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_cache_frame->_pts = frame->pts();
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} else {
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if ((next_pts + _pkt_dur_ms) < frame->pts()) { // 有丢包超过20ms
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_cache_frame->_pts = frame->pts() - dur;
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}
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}
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_cache_frame->_buffer.append(frame->data() + frame->prefixSize(), frame->size() - frame->prefixSize());
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auto stamp = _cache_frame->pts();
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auto ptr = _cache_frame->data() + _cache_frame->prefixSize();
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auto len = _cache_frame->size() - _cache_frame->prefixSize();
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auto remain_size = len;
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size_t max_size = 160 * _channels * _pkt_dur_ms / 20; // 20 ms per 160 byte
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size_t n = 0;
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bool mark = true;
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while (remain_size >= max_size) {
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assert(remain_size >= max_size);
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const size_t rtp_size = max_size;
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n++;
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stamp += _pkt_dur_ms;
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RtpCodec::inputRtp(getRtpInfo().makeRtp(TrackAudio, ptr, rtp_size, mark, stamp), false);
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ptr += rtp_size;
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remain_size -= rtp_size;
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}
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_cache_frame->_buffer.erase(0, n * max_size);
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_cache_frame->_pts += (uint64_t)_pkt_dur_ms * n;
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return len > 0;
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}
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} // namespace mediakit
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