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//
// ZoneMinder Remote Camera Class Implementation, $Date: 2009-06-03 09:10:28 +0100 (Wed, 03 Jun 2009) $, $Revision: 2907 $
// 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, 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 )
{
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();
}
}
RemoteCameraRtsp::~RemoteCameraRtsp()
{
if ( capture )
{
Terminate();
}
}
void RemoteCameraRtsp::Initialise()
{
RemoteCamera::Initialise();
int max_size = width*height*colours;
buffer.size( max_size );
if ( zm_dbg_level > ZM_DBG_INF )
av_log_set_level( AV_LOG_DEBUG );
else
av_log_set_level( AV_LOG_QUIET );
av_register_all();
frameCount = 0;
Connect();
}
void RemoteCameraRtsp::Terminate()
{
avcodec_close( codecContext );
av_free( codecContext );
av_free( picture );
Disconnect();
}
int RemoteCameraRtsp::Connect()
{
rtspThread = new RtspThread( id, method, protocol, host, port, path, auth );
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" );
formatContext = rtspThread->getFormatContext();
// Find the first video stream
int videoStream=-1;
for ( int i = 0; i < formatContext->nb_streams; i++ )
if ( formatContext->streams[i]->codec->codec_type == CODEC_TYPE_VIDEO )
{
videoStream = i;
break;
}
if ( videoStream == -1 )
Fatal( "Unable to locate video stream" );
// Get a pointer to the codec context for the video stream
codecContext = formatContext->streams[videoStream]->codec;
// Find the decoder for the video stream
codec = avcodec_find_decoder( codecContext->codec_id );
if ( codec == NULL )
Fatal( "Unable to locate codec %d decoder", codecContext->codec_id );
// Open codec
if ( avcodec_open( codecContext, codec ) < 0 )
Fatal( "Can't open codec" );
picture = avcodec_alloc_frame();
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 )
{
while ( true )
{
buffer.clear();
if ( !rtspThread->isRunning() )
break;
//if ( rtspThread->stopped() )
//break;
if ( rtspThread->getFrame( buffer ) )
{
Debug( 3, "Read frame %d bytes", buffer.size() );
Debug( 4, "Address %p", buffer.head() );
Hexdump( 4, buffer.head(), 16 );
static AVFrame *tmp_picture = NULL;
if ( !tmp_picture )
{
//if ( c->pix_fmt != pf )
//{
tmp_picture = avcodec_alloc_frame();
if ( !tmp_picture )
{
Fatal( "Could not allocate temporary opicture" );
}
int size = avpicture_get_size( PIX_FMT_RGB24, width, height);
uint8_t *tmp_picture_buf = (uint8_t *)malloc(size);
if (!tmp_picture_buf)
{
av_free( tmp_picture );
Fatal( "Could not allocate temporary opicture" );
}
avpicture_fill( (AVPicture *)tmp_picture, tmp_picture_buf, PIX_FMT_RGB24, width, height );
//}
}
if ( !buffer.size() )
return( -1 );
int initialFrameCount = frameCount;
while ( buffer.size() > 0 )
{
int got_picture = false;
int len = avcodec_decode_video( codecContext, picture, &got_picture, buffer.head(), buffer.size() );
if ( len < 0 )
{
if ( frameCount > initialFrameCount )
{
// Decoded at least one frame
return( 0 );
}
Error( "Error while decoding frame %d", frameCount );
Hexdump( ZM_DBG_ERR, buffer.head(), buffer.size()>256?256:buffer.size() );
buffer.clear();
continue;
//return( -1 );
}
Debug( 2, "Frame: %d - %d/%d", frameCount, len, buffer.size() );
//if ( buffer.size() < 400 )
//Hexdump( 0, buffer.head(), buffer.size() );
if ( got_picture )
{
/* the picture is allocated by the decoder. no need to free it */
Debug( 1, "Got picture %d", frameCount );
static struct SwsContext *img_convert_ctx = 0;
if ( !img_convert_ctx )
{
img_convert_ctx = sws_getContext( codecContext->width, codecContext->height, codecContext->pix_fmt, width, height, PIX_FMT_RGB24, SWS_BICUBIC, NULL, NULL, NULL );
if ( !img_convert_ctx )
Fatal( "Unable to initialise image scaling context" );
}
sws_scale( img_convert_ctx, picture->data, picture->linesize, 0, height, tmp_picture->data, tmp_picture->linesize );
image.Assign( width, height, colours, tmp_picture->data[0] );
frameCount++;
return( 0 );
}
else
{
Warning( "Unable to get picture from frame" );
}
buffer -= len;
}
}
}
return( -1 );
}
int RemoteCameraRtsp::PostCapture()
{
return( 0 );
}
#endif // HAVE_LIBAVFORMAT
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