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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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( int p_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 ) :
RemoteCamera( p_id, "rtsp", p_host, p_port, p_path, p_width, p_height, p_colours, p_brightness, p_contrast, p_hue, p_colour, p_capture ),
rtspThread( 0 ),
rtsp_describe( p_rtsp_describe )
{
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(), id );
if ( capture )
{
Initialise();
}
mFormatContext = NULL;
mVideoStreamId = -1;
mCodecContext = NULL;
mCodec = NULL;
mRawFrame = NULL;
mFrame = NULL;
frameCount = 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 = PIX_FMT_RGBA;
} else if(colours == ZM_COLOUR_RGB24) {
subpixelorder = ZM_SUBPIX_ORDER_RGB;
imagePixFormat = PIX_FMT_RGB24;
} else if(colours == ZM_COLOUR_GRAY8) {
subpixelorder = ZM_SUBPIX_ORDER_NONE;
imagePixFormat = PIX_FMT_GRAY8;
} else {
Panic("Unexpected colours: %d",colours);
}
}
RemoteCameraRtsp::~RemoteCameraRtsp()
{
av_freep( &mFrame );
av_freep( &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;
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( 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;
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
{
mVideoStreamId = i;
break;
}
if ( mVideoStreamId == -1 )
Fatal( "Unable to locate video 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)");
int pSize = avpicture_get_size( imagePixFormat, width, height );
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
if(nalType == 7)
{
lastSps = buffer;
continue;
}
// PPS
else if(nalType == 8)
{
lastPps = buffer;
continue;
}
// IDR
else if(nalType == 5)
{
buffer += lastSps;
buffer += lastPps;
}
}
av_init_packet( &packet );
while ( !frameComplete && buffer.size() > 0 )
{
packet.data = buffer.head();
packet.size = buffer.size();
#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 );
avpicture_fill( (AVPicture *)mFrame, directbuffer, imagePixFormat, width, height);
#if HAVE_LIBSWSCALE
if(mConvertContext == NULL) {
if(config.cpu_extensions && sseversion >= 20) {
mConvertContext = sws_getContext( mCodecContext->width, mCodecContext->height, mCodecContext->pix_fmt, width, height, imagePixFormat, SWS_BICUBIC | SWS_CPU_CAPS_SSE2, NULL, NULL, NULL );
} else {
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 */
av_free_packet( &packet );
} /* getFrame() */
if(frameComplete)
return (0);
}
return (0) ;
}
int RemoteCameraRtsp::PostCapture()
{
return( 0 );
}
#endif // HAVE_LIBAVFORMAT
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