54 lines
1.4 KiB
C++
54 lines
1.4 KiB
C++
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#include "JPEG.h"
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#include "Rtsp/Rtsp.h"
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#include "Util/util.h"
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using namespace toolkit;
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namespace mediakit {
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bool JPEGTrack::inputFrame(const Frame::Ptr &frame) {
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if (!ready()) {
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if ((_height & _width) > 0) {
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if (_tmp == 0) _tmp = frame->dts();
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else _fps = 1000.0 / (frame->dts() - _tmp);
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} else getVideoResolution((uint8_t*)frame->data(), frame->size());
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return false;
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}
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return VideoTrack::inputFrame(frame);
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}
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void JPEGTrack::getVideoResolution(const uint8_t *buf, int len) {
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for (int i = 0; i < len - 8; i++) {
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if (buf[i] != 0xff)
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continue;
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if (buf[i + 1] == 0xC0 /*SOF0*/) {
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_height = buf[i + 5] * 256 + buf[i + 6];
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_width = buf[i + 7] * 256 + buf[i + 8];
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return;
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}
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}
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}
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class JPEGSdp : public Sdp {
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public:
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JPEGSdp(int bitrate): Sdp(90000, Rtsp::PT_JPEG) {
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_printer << "m=video 0 RTP/AVP " << (int)getPayloadType() << "\r\n";
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if (bitrate) {
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_printer << "b=AS:" << bitrate << "\r\n";
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}
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_printer << "a=control:trackID=" << (int)TrackVideo << "\r\n";
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}
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std::string getSdp() const { return _printer; }
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CodecId getCodecId() const { return CodecJPEG; }
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private:
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_StrPrinter _printer;
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};
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Sdp::Ptr JPEGTrack::getSdp() {
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return std::make_shared<JPEGSdp>(getBitRate() / 1024);
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}
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} // namespace mediakit
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