mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-30 07:10:54 +08:00
139 lines
3.9 KiB
C++
139 lines
3.9 KiB
C++
/*
|
|
* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
|
|
*
|
|
* This file is part of ZLMediaKit(https://github.com/xiongziliang/ZLMediaKit).
|
|
*
|
|
* Use of this source code is governed by MIT license that can be found in the
|
|
* LICENSE file in the root of the source tree. All contributing project authors
|
|
* may be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
#include "AACRtmp.h"
|
|
#include "Rtmp/Rtmp.h"
|
|
|
|
namespace mediakit{
|
|
|
|
static string getAacCfg(const RtmpPacket &thiz) {
|
|
string ret;
|
|
if (thiz.getMediaType() != FLV_CODEC_AAC) {
|
|
return ret;
|
|
}
|
|
if (!thiz.isCfgFrame()) {
|
|
return ret;
|
|
}
|
|
if (thiz.buffer.size() < 4) {
|
|
WarnL << "bad aac cfg!";
|
|
return ret;
|
|
}
|
|
ret = thiz.buffer.substr(2);
|
|
return ret;
|
|
}
|
|
|
|
bool AACRtmpDecoder::inputRtmp(const RtmpPacket::Ptr &pkt, bool) {
|
|
if (pkt->isCfgFrame()) {
|
|
_aac_cfg = getAacCfg(*pkt);
|
|
onGetAAC(nullptr, 0, 0);
|
|
return false;
|
|
}
|
|
|
|
if (!_aac_cfg.empty()) {
|
|
onGetAAC(pkt->buffer.data() + 2, pkt->buffer.size() - 2, pkt->time_stamp);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void AACRtmpDecoder::onGetAAC(const char* data, int len, uint32_t stamp) {
|
|
auto frame = ResourcePoolHelper<FrameImp>::obtainObj();
|
|
frame->_codec_id = CodecAAC;
|
|
|
|
//生成adts头
|
|
char adts_header[32] = {0};
|
|
auto size = dumpAacConfig(_aac_cfg, len, (uint8_t *) adts_header, sizeof(adts_header));
|
|
if (size > 0) {
|
|
frame->_buffer.assign(adts_header, size);
|
|
frame->_prefix_size = size;
|
|
} else {
|
|
frame->_buffer.clear();
|
|
frame->_prefix_size = 0;
|
|
}
|
|
|
|
if(len > 0){
|
|
//追加负载数据
|
|
frame->_buffer.append(data, len);
|
|
frame->_dts = stamp;
|
|
}
|
|
|
|
if(size > 0 || len > 0){
|
|
//有adts头或者实际aac负载
|
|
RtmpCodec::inputFrame(frame);
|
|
}
|
|
}
|
|
|
|
/////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
AACRtmpEncoder::AACRtmpEncoder(const Track::Ptr &track) {
|
|
_track = dynamic_pointer_cast<AACTrack>(track);
|
|
}
|
|
|
|
void AACRtmpEncoder::makeConfigPacket() {
|
|
if (_track && _track->ready()) {
|
|
//从track中和获取aac配置信息
|
|
_aac_cfg = _track->getAacCfg();
|
|
}
|
|
|
|
if (!_aac_cfg.empty()) {
|
|
makeAudioConfigPkt();
|
|
}
|
|
}
|
|
|
|
void AACRtmpEncoder::inputFrame(const Frame::Ptr &frame) {
|
|
if (_aac_cfg.empty()) {
|
|
if (frame->prefixSize()) {
|
|
//包含adts头,从adts头获取aac配置信息
|
|
_aac_cfg = makeAacConfig((uint8_t *) (frame->data()), frame->prefixSize());
|
|
}
|
|
makeConfigPacket();
|
|
}
|
|
|
|
if(!_aac_cfg.empty()){
|
|
RtmpPacket::Ptr rtmpPkt = ResourcePoolHelper<RtmpPacket>::obtainObj();
|
|
rtmpPkt->buffer.clear();
|
|
|
|
//header
|
|
uint8_t is_config = false;
|
|
rtmpPkt->buffer.push_back(_audio_flv_flags);
|
|
rtmpPkt->buffer.push_back(!is_config);
|
|
|
|
//aac data
|
|
rtmpPkt->buffer.append(frame->data() + frame->prefixSize(), frame->size() - frame->prefixSize());
|
|
|
|
rtmpPkt->body_size = rtmpPkt->buffer.size();
|
|
rtmpPkt->chunk_id = CHUNK_AUDIO;
|
|
rtmpPkt->stream_index = STREAM_MEDIA;
|
|
rtmpPkt->time_stamp = frame->dts();
|
|
rtmpPkt->type_id = MSG_AUDIO;
|
|
RtmpCodec::inputRtmp(rtmpPkt, false);
|
|
}
|
|
}
|
|
|
|
void AACRtmpEncoder::makeAudioConfigPkt() {
|
|
_audio_flv_flags = getAudioRtmpFlags(std::make_shared<AACTrack>(_aac_cfg));
|
|
RtmpPacket::Ptr rtmpPkt = ResourcePoolHelper<RtmpPacket>::obtainObj();
|
|
rtmpPkt->buffer.clear();
|
|
|
|
//header
|
|
uint8_t is_config = true;
|
|
rtmpPkt->buffer.push_back(_audio_flv_flags);
|
|
rtmpPkt->buffer.push_back(!is_config);
|
|
//aac config
|
|
rtmpPkt->buffer.append(_aac_cfg);
|
|
|
|
rtmpPkt->body_size = rtmpPkt->buffer.size();
|
|
rtmpPkt->chunk_id = CHUNK_AUDIO;
|
|
rtmpPkt->stream_index = STREAM_MEDIA;
|
|
rtmpPkt->time_stamp = 0;
|
|
rtmpPkt->type_id = MSG_AUDIO;
|
|
RtmpCodec::inputRtmp(rtmpPkt, false);
|
|
}
|
|
|
|
}//namespace mediakit
|