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zoneminder/src/zm_remote_camera_rtsp.cpp

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//
// ZoneMinder Remote Camera Class Implementation, $Date$, $Revision$
// Copyright (C) 2001-2008 Philip Coombes
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
#include "zm.h"
#if HAVE_LIBAVFORMAT
#include "zm_remote_camera_rtsp.h"
#include "zm_ffmpeg.h"
#include "zm_mem_utils.h"
#include <sys/types.h>
#include <sys/socket.h>
RemoteCameraRtsp::RemoteCameraRtsp( unsigned int p_monitor_id, const std::string &p_method, const std::string &p_host, const std::string &p_port, const std::string &p_path, int p_width, int p_height, bool p_rtsp_describe, int p_colours, int p_brightness, int p_contrast, int p_hue, int p_colour, bool p_capture, bool p_record_audio ) :
RemoteCamera( p_monitor_id, "rtsp", p_host, p_port, p_path, p_width, p_height, p_colours, p_brightness, p_contrast, p_hue, p_colour, p_capture, p_record_audio ),
rtsp_describe( p_rtsp_describe ),
rtspThread( 0 )
{
if ( p_method == "rtpUni" )
method = RtspThread::RTP_UNICAST;
else if ( p_method == "rtpMulti" )
method = RtspThread::RTP_MULTICAST;
else if ( p_method == "rtpRtsp" )
method = RtspThread::RTP_RTSP;
else if ( p_method == "rtpRtspHttp" )
method = RtspThread::RTP_RTSP_HTTP;
else
Fatal( "Unrecognised method '%s' when creating RTSP camera %d", p_method.c_str(), monitor_id );
if ( capture ) {
Initialise();
}
mFormatContext = NULL;
mVideoStreamId = -1;
mAudioStreamId = -1;
mCodecContext = NULL;
mCodec = NULL;
mRawFrame = NULL;
mFrame = NULL;
frameCount = 0;
startTime=0;
#if HAVE_LIBSWSCALE
mConvertContext = NULL;
#endif
/* Has to be located inside the constructor so other components such as zma will receive correct colours and subpixel order */
if(colours == ZM_COLOUR_RGB32) {
subpixelorder = ZM_SUBPIX_ORDER_RGBA;
imagePixFormat = AV_PIX_FMT_RGBA;
} else if(colours == ZM_COLOUR_RGB24) {
subpixelorder = ZM_SUBPIX_ORDER_RGB;
imagePixFormat = AV_PIX_FMT_RGB24;
} else if(colours == ZM_COLOUR_GRAY8) {
subpixelorder = ZM_SUBPIX_ORDER_NONE;
imagePixFormat = AV_PIX_FMT_GRAY8;
} else {
Panic("Unexpected colours: %d",colours);
}
} // end RemoteCameraRtsp::RemoteCameraRtsp(...)
RemoteCameraRtsp::~RemoteCameraRtsp() {
av_frame_free( &mFrame );
av_frame_free( &mRawFrame );
#if HAVE_LIBSWSCALE
if ( mConvertContext ) {
sws_freeContext( mConvertContext );
mConvertContext = NULL;
}
#endif
if ( mCodecContext ) {
avcodec_close( mCodecContext );
mCodecContext = NULL; // Freed by avformat_free_context in the destructor of RtspThread class
}
if ( capture ) {
Terminate();
}
}
void RemoteCameraRtsp::Initialise() {
RemoteCamera::Initialise();
int max_size = width*height*colours;
// This allocates a buffer able to hold a raw fframe, which is a little artbitrary. Might be nice to get some
// decent data on how large a buffer is really needed. I think in ffmpeg there are now some functions to do that.
buffer.size( max_size );
if ( logDebugging() )
av_log_set_level( AV_LOG_DEBUG );
else
av_log_set_level( AV_LOG_QUIET );
av_register_all();
Connect();
}
void RemoteCameraRtsp::Terminate() {
Disconnect();
}
int RemoteCameraRtsp::Connect() {
rtspThread = new RtspThread( monitor_id, method, protocol, host, port, path, auth, rtsp_describe );
rtspThread->start();
return( 0 );
}
int RemoteCameraRtsp::Disconnect() {
if ( rtspThread ) {
rtspThread->stop();
rtspThread->join();
delete rtspThread;
rtspThread = 0;
}
return( 0 );
}
int RemoteCameraRtsp::PrimeCapture() {
Debug( 2, "Waiting for sources" );
for ( int i = 0; i < 100 && !rtspThread->hasSources(); i++ ) {
usleep( 100000 );
}
if ( !rtspThread->hasSources() )
Fatal( "No RTSP sources" );
Debug( 2, "Got sources" );
mFormatContext = rtspThread->getFormatContext();
// Find first video stream present
mVideoStreamId = -1;
mAudioStreamId = -1;
// Find the first video stream.
for ( unsigned int i = 0; i < mFormatContext->nb_streams; i++ ) {
#if (LIBAVCODEC_VERSION_CHECK(52, 64, 0, 64, 0) || LIBAVUTIL_VERSION_CHECK(50, 14, 0, 14, 0))
if ( mFormatContext->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO )
#else
if ( mFormatContext->streams[i]->codec->codec_type == CODEC_TYPE_VIDEO )
#endif
{
if ( mVideoStreamId == -1 ) {
mVideoStreamId = i;
continue;
} else {
Debug(2, "Have another video stream." );
}
}
#if (LIBAVCODEC_VERSION_CHECK(52, 64, 0, 64, 0) || LIBAVUTIL_VERSION_CHECK(50, 14, 0, 14, 0))
if ( mFormatContext->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO )
#else
if ( mFormatContext->streams[i]->codec->codec_type == CODEC_TYPE_AUDIO )
#endif
{
if ( mAudioStreamId == -1 ) {
mAudioStreamId = i;
} else {
Debug(2, "Have another audio stream." );
}
}
} // end foreach stream
if ( mVideoStreamId == -1 )
Fatal( "Unable to locate video stream" );
if ( mAudioStreamId == -1 )
Debug( 3, "Unable to locate audio stream" );
// Get a pointer to the codec context for the video stream
mCodecContext = mFormatContext->streams[mVideoStreamId]->codec;
// Find the decoder for the video stream
mCodec = avcodec_find_decoder( mCodecContext->codec_id );
if ( mCodec == NULL )
Panic( "Unable to locate codec %d decoder", mCodecContext->codec_id );
// Open codec
#if !LIBAVFORMAT_VERSION_CHECK(53, 8, 0, 8, 0)
if ( avcodec_open( mCodecContext, mCodec ) < 0 )
#else
if ( avcodec_open2( mCodecContext, mCodec, 0 ) < 0 )
#endif
Panic( "Can't open codec" );
// Allocate space for the native video frame
#if LIBAVCODEC_VERSION_CHECK(55, 28, 1, 45, 101)
mRawFrame = av_frame_alloc();
#else
mRawFrame = avcodec_alloc_frame();
#endif
// Allocate space for the converted video frame
#if LIBAVCODEC_VERSION_CHECK(55, 28, 1, 45, 101)
mFrame = av_frame_alloc();
#else
mFrame = avcodec_alloc_frame();
#endif
if(mRawFrame == NULL || mFrame == NULL)
Fatal( "Unable to allocate frame(s)");
#if LIBAVUTIL_VERSION_CHECK(54, 6, 0, 6, 0)
int pSize = av_image_get_buffer_size( imagePixFormat, width, height, 1 );
#else
int pSize = avpicture_get_size( imagePixFormat, width, height );
#endif
if ( (unsigned int)pSize != imagesize ) {
Fatal("Image size mismatch. Required: %d Available: %d",pSize,imagesize);
}
/*
#if HAVE_LIBSWSCALE
if(!sws_isSupportedInput(mCodecContext->pix_fmt)) {
Fatal("swscale does not support the codec format: %c%c%c%c",(mCodecContext->pix_fmt)&0xff,((mCodecContext->pix_fmt>>8)&0xff),((mCodecContext->pix_fmt>>16)&0xff),((mCodecContext->pix_fmt>>24)&0xff));
}
if(!sws_isSupportedOutput(imagePixFormat)) {
Fatal("swscale does not support the target format: %c%c%c%c",(imagePixFormat)&0xff,((imagePixFormat>>8)&0xff),((imagePixFormat>>16)&0xff),((imagePixFormat>>24)&0xff));
}
#else // HAVE_LIBSWSCALE
Fatal( "You must compile ffmpeg with the --enable-swscale option to use RTSP cameras" );
#endif // HAVE_LIBSWSCALE
*/
return( 0 );
}
int RemoteCameraRtsp::PreCapture() {
if ( !rtspThread->isRunning() )
return( -1 );
if ( !rtspThread->hasSources() ) {
Error( "Cannot precapture, no RTP sources" );
return( -1 );
}
return( 0 );
}
int RemoteCameraRtsp::Capture( Image &image ) {
AVPacket packet;
uint8_t* directbuffer;
int frameComplete = false;
/* Request a writeable buffer of the target image */
directbuffer = image.WriteBuffer(width, height, colours, subpixelorder);
if ( directbuffer == NULL ) {
Error("Failed requesting writeable buffer for the captured image.");
return -1;
}
while ( true ) {
buffer.clear();
if ( !rtspThread->isRunning() )
return -1;
if ( rtspThread->getFrame( buffer ) ) {
Debug( 3, "Read frame %d bytes", buffer.size() );
Debug( 4, "Address %p", buffer.head() );
Hexdump( 4, buffer.head(), 16 );
if ( !buffer.size() )
return -1;
if ( mCodecContext->codec_id == AV_CODEC_ID_H264 ) {
// SPS and PPS frames should be saved and appended to IDR frames
int nalType = (buffer.head()[3] & 0x1f);
// SPS The SPS NAL unit contains parameters that apply to a series of consecutive coded video pictures
if ( nalType == 7 ) {
lastSps = buffer;
continue;
} else if ( nalType == 8 ) {
// PPS The PPS NAL unit contains parameters that apply to the decoding of one or more individual pictures inside a coded video sequence
lastPps = buffer;
continue;
} else if ( nalType == 5 ) {
// IDR
buffer += lastSps;
buffer += lastPps;
}
} else {
Debug(3, "Not an h264 packet");
}
av_init_packet( &packet );
while ( !frameComplete && buffer.size() > 0 ) {
packet.data = buffer.head();
packet.size = buffer.size();
// So I think this is the magic decode step. Result is a raw image?
#if LIBAVCODEC_VERSION_CHECK(52, 23, 0, 23, 0)
int len = avcodec_decode_video2( mCodecContext, mRawFrame, &frameComplete, &packet );
#else
int len = avcodec_decode_video( mCodecContext, mRawFrame, &frameComplete, packet.data, packet.size );
#endif
if ( len < 0 ) {
Error( "Error while decoding frame %d", frameCount );
Hexdump( Logger::ERROR, buffer.head(), buffer.size()>256?256:buffer.size() );
buffer.clear();
continue;
}
Debug( 2, "Frame: %d - %d/%d", frameCount, len, buffer.size() );
//if ( buffer.size() < 400 )
//Hexdump( 0, buffer.head(), buffer.size() );
buffer -= len;
}
// At this point, we either have a frame or ran out of buffer. What happens if we run out of buffer?
if ( frameComplete ) {
Debug( 3, "Got frame %d", frameCount );
avpicture_fill( (AVPicture *)mFrame, directbuffer, imagePixFormat, width, height );
#if HAVE_LIBSWSCALE
if(mConvertContext == NULL) {
mConvertContext = sws_getContext( mCodecContext->width, mCodecContext->height, mCodecContext->pix_fmt, width, height, imagePixFormat, SWS_BICUBIC, NULL, NULL, NULL );
if(mConvertContext == NULL)
Fatal( "Unable to create conversion context");
}
if ( sws_scale( mConvertContext, mRawFrame->data, mRawFrame->linesize, 0, mCodecContext->height, mFrame->data, mFrame->linesize ) < 0 )
Fatal( "Unable to convert raw format %u to target format %u at frame %d", mCodecContext->pix_fmt, imagePixFormat, frameCount );
#else // HAVE_LIBSWSCALE
Fatal( "You must compile ffmpeg with the --enable-swscale option to use RTSP cameras" );
#endif // HAVE_LIBSWSCALE
frameCount++;
} /* frame complete */
zm_av_packet_unref( &packet );
} /* getFrame() */
if ( frameComplete )
return 1;
} // end while true
// can never get here.
return 0;
}
//Function to handle capture and store
int RemoteCameraRtsp::CaptureAndRecord(Image &image, timeval recording, char* event_file ) {
AVPacket packet;
uint8_t* directbuffer;
int frameComplete = false;
while ( true ) {
// WHY Are we clearing it? Might be something good in it.
buffer.clear();
if ( !rtspThread->isRunning() )
return (-1);
//Video recording
if ( recording.tv_sec ) {
// The directory we are recording to is no longer tied to the current event.
// Need to re-init the videostore with the correct directory and start recording again
// Not sure why we are only doing this on keyframe, al
if ( videoStore && (strcmp(oldDirectory, event_file)!=0) ) {
//don't open new videostore until we're on a key frame..would this require an offset adjustment for the event as a result?...if we store our key frame location with the event will that be enough?
Info("Re-starting video storage module");
if ( videoStore ) {
delete videoStore;
videoStore = NULL;
}
} // end if changed to new event
if ( ! videoStore ) {
//Instantiate the video storage module
videoStore = new VideoStore((const char *)event_file, "mp4",
mFormatContext->streams[mVideoStreamId],
mAudioStreamId==-1?NULL:mFormatContext->streams[mAudioStreamId],
startTime,
this->getMonitor() );
strcpy(oldDirectory, event_file);
} // end if ! videoStore
} else {
if ( videoStore ) {
Info("Deleting videoStore instance");
delete videoStore;
videoStore = NULL;
}
} // end if recording or not
if ( rtspThread->getFrame( buffer ) ) {
Debug( 3, "Read frame %d bytes", buffer.size() );
Debug( 4, "Address %p", buffer.head() );
Hexdump( 4, buffer.head(), 16 );
if ( !buffer.size() )
return( -1 );
if ( mCodecContext->codec_id == AV_CODEC_ID_H264 ) {
// SPS and PPS frames should be saved and appended to IDR frames
int nalType = (buffer.head()[3] & 0x1f);
// SPS
if(nalType == 7) {
lastSps = buffer;
continue;
} else if(nalType == 8) {
// PPS
lastPps = buffer;
continue;
} else if(nalType == 5) {
// IDR
buffer += lastSps;
buffer += lastPps;
}
} // end if H264, what about other codecs?
av_init_packet( &packet );
// Keep decoding until a complete frame is had.
while ( !frameComplete && buffer.size() > 0 ) {
packet.data = buffer.head();
packet.size = buffer.size();
// Why are we checking for it being the video stream? Because it might be audio or something else.
// Um... we just initialized packet... we can't be testing for what it is yet....
if ( packet.stream_index == mVideoStreamId ) {
// So this does the decode
#if LIBAVCODEC_VERSION_CHECK(52, 23, 0, 23, 0)
int len = avcodec_decode_video2( mCodecContext, mRawFrame, &frameComplete, &packet );
#else
int len = avcodec_decode_video( mCodecContext, mRawFrame, &frameComplete, packet.data, packet.size );
#endif
if ( len < 0 ) {
Error( "Error while decoding frame %d", frameCount );
Hexdump( Logger::ERROR, buffer.head(), buffer.size()>256?256:buffer.size() );
buffer.clear();
continue;
}
Debug( 2, "Frame: %d - %d/%d", frameCount, len, buffer.size() );
//if ( buffer.size() < 400 )
//Hexdump( 0, buffer.head(), buffer.size() );
buffer -= len;
if ( frameComplete ) {
Debug( 3, "Got frame %d", frameCount );
/* Request a writeable buffer of the target image */
directbuffer = image.WriteBuffer(width, height, colours, subpixelorder);
if(directbuffer == NULL) {
Error("Failed requesting writeable buffer for the captured image.");
return (-1);
}
#if LIBAVUTIL_VERSION_CHECK(54, 6, 0, 6, 0)
av_image_fill_arrays(mFrame->data, mFrame->linesize,
directbuffer, imagePixFormat, width, height, 1);
#else
avpicture_fill( (AVPicture *)mFrame, directbuffer,
imagePixFormat, width, height);
#endif
} // endif frameComplete
if ( videoStore ) {
//Write the packet to our video store
int ret = videoStore->writeVideoFramePacket(&packet);//, &lastKeyframePkt);
if ( ret < 0 ) {//Less than zero and we skipped a frame
// Should not
zm_av_packet_unref( &packet );
return 0;
}
} // end if videoStore, so we are recording
#if HAVE_LIBSWSCALE
// Why are we re-scaling after writing out the packet?
if ( mConvertContext == NULL ) {
mConvertContext = sws_getContext( mCodecContext->width, mCodecContext->height, mCodecContext->pix_fmt, width, height, imagePixFormat, SWS_BICUBIC, NULL, NULL, NULL );
if ( mConvertContext == NULL )
Fatal( "Unable to create conversion context");
}
if ( sws_scale( mConvertContext, mRawFrame->data, mRawFrame->linesize, 0, mCodecContext->height, mFrame->data, mFrame->linesize ) < 0 )
Fatal( "Unable to convert raw format %u to target format %u at frame %d", mCodecContext->pix_fmt, imagePixFormat, frameCount );
#else // HAVE_LIBSWSCALE
Fatal( "You must compile ffmpeg with the --enable-swscale option to use RTSP cameras" );
#endif // HAVE_LIBSWSCALE
frameCount++;
} else if ( packet.stream_index == mAudioStreamId ) {
Debug( 4, "Got audio packet" );
if ( videoStore && record_audio ) {
Debug( 4, "Storing Audio packet" );
//Write the packet to our video store
int ret = videoStore->writeAudioFramePacket( &packet ); //FIXME no relevance of last key frame
if ( ret < 0 ) { //Less than zero and we skipped a frame
zm_av_packet_unref( &packet );
return 0;
}
}
} // end if video or audio packet
zm_av_packet_unref( &packet );
} // end while ! framecomplete and buffer.size()
if(frameComplete)
return (0);
} /* getFrame() */
} // end while true
// can never get here.
return (0) ;
} // int RemoteCameraRtsp::CaptureAndRecord( Image &image, bool recording, char* event_file )
int RemoteCameraRtsp::PostCapture() {
return( 0 );
}
#endif // HAVE_LIBAVFORMAT
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