ZLMediaKit/ext-codec/L16.cpp

121 lines
3.4 KiB
C++

/*
* Copyright (c) 2016-present The ZLMediaKit project authors. All Rights Reserved.
*
* This file is part of ZLMediaKit(https://github.com/ZLMediaKit/ZLMediaKit).
*
* Use of this source code is governed by MIT-like 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 "L16.h"
#include "Extension/Factory.h"
#include "Extension/CommonRtp.h"
#include "Extension/CommonRtmp.h"
using namespace std;
using namespace toolkit;
namespace mediakit {
/**
* L16类型SDP
* L16 type SDP
* [AUTO-TRANSLATED:11b1196d]
*/
class L16Sdp : public Sdp {
public:
/**
* L16采样位数固定为16位
* @param payload_type rtp payload type
* @param channels 通道数
* @param sample_rate 音频采样率
* @param bitrate 比特率
* L16 sampling bit width is fixed to 16 bits
* @param payload_type rtp payload type
* @param channels number of channels
* @param sample_rate audio sampling rate
* @param bitrate bitrate
* [AUTO-TRANSLATED:7a08a400]
*/
L16Sdp(int payload_type, int sample_rate, int channels, int bitrate) : Sdp(sample_rate, payload_type) {
_printer << "m=audio 0 RTP/AVP " << payload_type << "\r\n";
if (bitrate) {
_printer << "b=AS:" << bitrate << "\r\n";
}
_printer << "a=rtpmap:" << payload_type << " " << getCodecName(CodecL16) << "/" << sample_rate << "/" << channels << "\r\n";
}
string getSdp() const override { return _printer; }
private:
_StrPrinter _printer;
};
Sdp::Ptr L16Track::getSdp(uint8_t payload_type) const {
WarnL << "Enter L16Track::getSdp function";
if (!ready()) {
WarnL << getCodecName() << " Track未准备好";
return nullptr;
}
return std::make_shared<L16Sdp>(payload_type, getAudioSampleRate(), getAudioChannel(), getBitRate() / 1024);
}
Track::Ptr L16Track::clone() const {
return std::make_shared<L16Track>(*this);
}
namespace {
CodecId getCodec() {
return CodecL16;
}
Track::Ptr getTrackByCodecId(int sample_rate, int channels, int sample_bit) {
return std::make_shared<L16Track>(sample_rate, channels);
}
Track::Ptr getTrackBySdp(const SdpTrack::Ptr &track) {
return std::make_shared<L16Track>(track->_samplerate, track->_channel);
}
RtpCodec::Ptr getRtpEncoderByCodecId(uint8_t pt) {
return std::make_shared<CommonRtpEncoder>();
}
RtpCodec::Ptr getRtpDecoderByCodecId() {
return std::make_shared<CommonRtpDecoder>(CodecL16);
}
RtmpCodec::Ptr getRtmpEncoderByTrack(const Track::Ptr &track) {
WarnL << "Unsupported L16 rtmp encoder";
return nullptr;
}
RtmpCodec::Ptr getRtmpDecoderByTrack(const Track::Ptr &track) {
WarnL << "Unsupported L16 rtmp decoder";
return nullptr;
}
Frame::Ptr getFrameFromPtr(const char *data, size_t bytes, uint64_t dts, uint64_t pts) {
return std::make_shared<FrameFromPtr>(CodecL16, (char *)data, bytes, dts, pts);
}
} // namespace
CodecPlugin l16_plugin = { getCodec,
getTrackByCodecId,
getTrackBySdp,
getRtpEncoderByCodecId,
getRtpDecoderByCodecId,
getRtmpEncoderByTrack,
getRtmpDecoderByTrack,
getFrameFromPtr };
}//namespace mediakit