327 lines
9.8 KiB
C++
327 lines
9.8 KiB
C++
//
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// ZoneMinder Remote Camera Class Implementation, $Date$, $Revision$
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// Copyright (C) 2001-2008 Philip Coombes
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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//
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#include "zm_remote_camera_rtsp.h"
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#include "zm_config.h"
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#include "zm_packet.h"
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#if HAVE_LIBAVFORMAT
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RemoteCameraRtsp::RemoteCameraRtsp(
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const Monitor *monitor,
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const std::string &p_method,
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const std::string &p_host,
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const std::string &p_port,
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const std::string &p_path,
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int p_width,
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int p_height,
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bool p_rtsp_describe,
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int p_colours,
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int p_brightness,
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int p_contrast,
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int p_hue,
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int p_colour,
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bool p_capture,
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bool p_record_audio ) :
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RemoteCamera(
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monitor, "rtsp",
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p_host, p_port, p_path,
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p_width, p_height, p_colours,
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p_brightness, p_contrast, p_hue, p_colour,
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p_capture, p_record_audio),
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rtsp_describe(p_rtsp_describe),
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rtspThread(0),
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frameCount(0)
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{
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if ( p_method == "rtpUni" )
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method = RtspThread::RTP_UNICAST;
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else if ( p_method == "rtpMulti" )
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method = RtspThread::RTP_MULTICAST;
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else if ( p_method == "rtpRtsp" )
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method = RtspThread::RTP_RTSP;
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else if ( p_method == "rtpRtspHttp" )
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method = RtspThread::RTP_RTSP_HTTP;
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else
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Fatal("Unrecognised method '%s' when creating RTSP camera %d", p_method.c_str(), monitor->Id());
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if ( capture ) {
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Initialise();
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}
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/* Has to be located inside the constructor so other components such as zma will receive correct colours and subpixel order */
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if ( colours == ZM_COLOUR_RGB32 ) {
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subpixelorder = ZM_SUBPIX_ORDER_RGBA;
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imagePixFormat = AV_PIX_FMT_RGBA;
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} else if ( colours == ZM_COLOUR_RGB24 ) {
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subpixelorder = ZM_SUBPIX_ORDER_RGB;
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imagePixFormat = AV_PIX_FMT_RGB24;
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} else if ( colours == ZM_COLOUR_GRAY8 ) {
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subpixelorder = ZM_SUBPIX_ORDER_NONE;
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imagePixFormat = AV_PIX_FMT_GRAY8;
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} else {
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Panic("Unexpected colours: %d", colours);
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}
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} // end RemoteCameraRtsp::RemoteCameraRtsp(...)
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RemoteCameraRtsp::~RemoteCameraRtsp() {
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if ( mVideoCodecContext ) {
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avcodec_close(mVideoCodecContext);
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mVideoCodecContext = nullptr; // Freed by avformat_free_context in the destructor of RtspThread class
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}
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// Is allocated in RTSPThread and is free there as well
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mFormatContext = nullptr;
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if ( capture ) {
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Terminate();
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}
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}
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void RemoteCameraRtsp::Initialise() {
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RemoteCamera::Initialise();
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int max_size = width*height*colours;
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// This allocates a buffer able to hold a raw fframe, which is a little artbitrary. Might be nice to get some
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// decent data on how large a buffer is really needed. I think in ffmpeg there are now some functions to do that.
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buffer.size(max_size);
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FFMPEGInit();
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Connect();
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}
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void RemoteCameraRtsp::Terminate() {
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Disconnect();
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}
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int RemoteCameraRtsp::Connect() {
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rtspThread = new RtspThread(monitor->Id(), method, protocol, host, port, path, auth, rtsp_describe);
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rtspThread->start();
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return 0;
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}
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int RemoteCameraRtsp::Disconnect() {
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if ( rtspThread ) {
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rtspThread->stop();
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rtspThread->join();
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delete rtspThread;
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rtspThread = nullptr;
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}
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return 0;
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}
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int RemoteCameraRtsp::PrimeCapture() {
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Debug(2, "Waiting for sources");
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for ( int i = 0; (i < 100) && !rtspThread->hasSources(); i++ ) {
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usleep(100000);
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}
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if ( !rtspThread->hasSources() ) {
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Error("No RTSP sources");
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return -1;
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}
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Debug(2, "Got sources");
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mFormatContext = rtspThread->getFormatContext();
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// Find first video stream present
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mVideoStreamId = -1;
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mAudioStreamId = -1;
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// Find the first video stream.
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for ( unsigned int i = 0; i < mFormatContext->nb_streams; i++ ) {
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if ( is_video_stream(mFormatContext->streams[i]) ) {
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if ( mVideoStreamId == -1 ) {
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mVideoStreamId = i;
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mVideoStream = mFormatContext->streams[i];
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mVideoStream->time_base = AV_TIME_BASE_Q;
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continue;
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} else {
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Debug(2, "Have another video stream.");
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}
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#if 0
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} else if ( is_audio_stream(mFormatContext->streams[i]) ) {
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if ( mAudioStreamId == -1 ) {
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mAudioStreamId = i;
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mAudioStream = mFormatContext->streams[i];
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} else {
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Debug(2, "Have another audio stream.");
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}
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#endif
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} else {
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Debug(1, "Have unknown codec type in stream %d", i);
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}
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} // end foreach stream
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if ( mVideoStreamId == -1 )
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Fatal("Unable to locate video stream");
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if ( mAudioStreamId == -1 )
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Debug(3, "Unable to locate audio stream");
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// Get a pointer to the codec context for the video stream
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#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
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mVideoCodecContext = avcodec_alloc_context3(NULL);
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avcodec_parameters_to_context(mVideoCodecContext, mFormatContext->streams[mVideoStreamId]->codecpar);
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#else
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mVideoCodecContext = mFormatContext->streams[mVideoStreamId]->codec;
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#endif
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// Find the decoder for the video stream
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AVCodec *codec = avcodec_find_decoder(mVideoCodecContext->codec_id);
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if ( codec == nullptr )
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Panic("Unable to locate codec %d decoder", mVideoCodecContext->codec_id);
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// Open codec
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#if !LIBAVFORMAT_VERSION_CHECK(53, 8, 0, 8, 0)
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if ( avcodec_open(mVideoCodecContext, codec) < 0 )
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#else
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if ( avcodec_open2(mVideoCodecContext, codec, 0) < 0 )
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#endif
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Panic("Can't open codec");
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#if LIBAVUTIL_VERSION_CHECK(54, 6, 0, 6, 0)
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int pSize = av_image_get_buffer_size(imagePixFormat, width, height, 1);
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#else
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int pSize = avpicture_get_size(imagePixFormat, width, height);
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#endif
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if ( (unsigned int)pSize != imagesize ) {
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Fatal("Image size mismatch. Required: %d Available: %d", pSize, imagesize);
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}
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return 1;
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} // end PrimeCapture
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int RemoteCameraRtsp::PreCapture() {
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if ( !rtspThread->isRunning() )
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return -1;
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if ( !rtspThread->hasSources() ) {
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Error("Cannot precapture, no RTP sources");
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return -1;
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}
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return 1;
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}
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int RemoteCameraRtsp::Capture(ZMPacket &zm_packet) {
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int frameComplete = false;
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AVPacket *packet = &zm_packet.packet;
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if ( !zm_packet.image ) {
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Debug(1, "Allocating image %dx%d %d colours %d", width, height, colours, subpixelorder);
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zm_packet.image = new Image(width, height, colours, subpixelorder);
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}
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while ( !frameComplete ) {
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buffer.clear();
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if ( !rtspThread->isRunning() )
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return -1;
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if ( rtspThread->getFrame(buffer) ) {
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Debug(3, "Read frame %d bytes", buffer.size());
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Hexdump(4, buffer.head(), 16);
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if ( !buffer.size() )
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return -1;
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if ( mVideoCodecContext->codec_id == AV_CODEC_ID_H264 ) {
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// SPS and PPS frames should be saved and appended to IDR frames
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int nalType = (buffer.head()[3] & 0x1f);
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// SPS The SPS NAL unit contains parameters that apply to a series of consecutive coded video pictures
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if ( nalType == 1 ) {
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} else if ( nalType == 7 ) {
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lastSps = buffer;
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continue;
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} else if ( nalType == 8 ) {
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// PPS The PPS NAL unit contains parameters that apply to the decoding of one or more individual pictures inside a coded video sequence
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lastPps = buffer;
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continue;
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} else if ( nalType == 5 ) {
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packet->flags |= AV_PKT_FLAG_KEY;
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zm_packet.keyframe = 1;
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// IDR
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buffer += lastSps;
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buffer += lastPps;
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} else {
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Debug(2, "Unknown nalType %d", nalType);
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}
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} else {
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Debug(3, "Not an h264 packet");
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}
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//while ( (!frameComplete) && (buffer.size() > 0) ) {
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if ( buffer.size() > 0 ) {
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packet->data = buffer.head();
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packet->size = buffer.size();
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bytes += packet->size;
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struct timeval now;
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gettimeofday(&now, NULL);
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packet->pts = packet->dts = now.tv_sec*1000000+now.tv_usec;
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int bytes_consumed = zm_packet.decode(mVideoCodecContext);
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if ( bytes_consumed < 0 ) {
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Error("Error while decoding frame %d", frameCount);
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//Hexdump(Logger::ERROR, buffer.head(), buffer.size()>256?256:buffer.size());
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}
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buffer -= packet->size;
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if ( bytes_consumed ) {
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zm_dump_video_frame(zm_packet.in_frame, "remote_rtsp_decode");
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if ( ! mVideoStream->
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#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
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codecpar
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#else
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codec
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#endif
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->width ) {
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zm_dump_codec(mVideoCodecContext);
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#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
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zm_dump_codecpar(mVideoStream->codecpar);
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mVideoStream->codecpar->width = zm_packet.in_frame->width;
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mVideoStream->codecpar->height = zm_packet.in_frame->height;
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#else
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mVideoStream->codec->width = zm_packet.in_frame->width;
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mVideoStream->codec->height = zm_packet.in_frame->height;
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#endif
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#if LIBAVCODEC_VERSION_CHECK(57, 64, 0, 64, 0)
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zm_dump_codecpar(mVideoStream->codecpar);
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#endif
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}
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zm_packet.codec_type = mVideoCodecContext->codec_type;
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frameComplete = true;
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Debug(2, "Frame: %d - %d/%d", frameCount, bytes_consumed, buffer.size());
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packet->data = nullptr;
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packet->size = 0;
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}
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}
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} /* getFrame() */
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} // end while true
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return 1;
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} // end int RemoteCameraRtsp::Capture(ZMPacket &packet)
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int RemoteCameraRtsp::PostCapture() {
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return 1;
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}
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#endif // HAVE_LIBAVFORMAT
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