264 lines
8.3 KiB
C++
264 lines
8.3 KiB
C++
//
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// ZoneMinder Ffmpeg Camera Class Implementation, $Date: 2009-01-16 12:18:50 +0000 (Fri, 16 Jan 2009) $, $Revision: 2713 $
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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//
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#include "zm.h"
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#if HAVE_LIBAVFORMAT
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#include "zm_ffmpeg_camera.h"
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FfmpegCamera::FfmpegCamera( int p_id, 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 ) :
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Camera( p_id, FFMPEG_SRC, p_width, p_height, p_colours, ZM_SUBPIX_ORDER_DEFAULT_FOR_COLOUR(p_colours), p_brightness, p_contrast, p_hue, p_colour, p_capture ),
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mPath( p_path )
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{
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if ( capture )
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{
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Initialise();
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}
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mFormatContext = NULL;
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mVideoStreamId = -1;
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mCodecContext = NULL;
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mCodec = NULL;
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mRawFrame = NULL;
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mFrame = NULL;
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frameCount = 0;
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#if HAVE_LIBSWSCALE
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mConvertContext = NULL;
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#endif
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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 = 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 = 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 = 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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}
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FfmpegCamera::~FfmpegCamera()
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{
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av_freep( &mFrame );
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av_freep( &mRawFrame );
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#if HAVE_LIBSWSCALE
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if ( mConvertContext )
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{
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sws_freeContext( mConvertContext );
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mConvertContext = NULL;
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}
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#endif
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if ( mCodecContext )
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{
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avcodec_close( mCodecContext );
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mCodecContext = NULL; // Freed by av_close_input_file
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}
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if ( mFormatContext )
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{
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#if LIBAVFORMAT_VERSION_INT < AV_VERSION_INT(53, 4, 0)
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av_close_input_file( mFormatContext );
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#else
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avformat_close_input( &mFormatContext );
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#endif
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mFormatContext = NULL;
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}
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if ( capture )
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{
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Terminate();
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}
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}
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void FfmpegCamera::Initialise()
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{
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if ( logDebugging() )
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av_log_set_level( AV_LOG_DEBUG );
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else
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av_log_set_level( AV_LOG_QUIET );
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av_register_all();
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}
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void FfmpegCamera::Terminate()
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{
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}
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int FfmpegCamera::PrimeCapture()
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{
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Info( "Priming capture from %s", mPath.c_str() );
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// Open the input, not necessarily a file
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#if LIBAVFORMAT_VERSION_INT < AV_VERSION_INT(53, 4, 0)
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if ( av_open_input_file( &mFormatContext, mPath.c_str(), NULL, 0, NULL ) !=0 )
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#else
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if ( avformat_open_input( &mFormatContext, mPath.c_str(), NULL, NULL ) !=0 )
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#endif
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Fatal( "Unable to open input %s due to: %s", mPath.c_str(), strerror(errno) );
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// Locate stream info from input
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#if LIBAVFORMAT_VERSION_INT < AV_VERSION_INT(53, 4, 0)
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if ( av_find_stream_info( mFormatContext ) < 0 )
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#else
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if ( avformat_find_stream_info( mFormatContext, 0 ) < 0 )
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#endif
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Fatal( "Unable to find stream info from %s due to: %s", mPath.c_str(), strerror(errno) );
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// Find first video stream present
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mVideoStreamId = -1;
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for (unsigned int i=0; i < mFormatContext->nb_streams; i++ )
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{
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#if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(51,2,1)
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if ( mFormatContext->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO )
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#else
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if ( mFormatContext->streams[i]->codec->codec_type == CODEC_TYPE_VIDEO )
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#endif
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{
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mVideoStreamId = i;
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break;
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}
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}
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if ( mVideoStreamId == -1 )
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Fatal( "Unable to locate video stream in %s", mPath.c_str() );
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mCodecContext = mFormatContext->streams[mVideoStreamId]->codec;
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// Try and get the codec from the codec context
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if ( (mCodec = avcodec_find_decoder( mCodecContext->codec_id )) == NULL )
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Fatal( "Can't find codec for video stream from %s", mPath.c_str() );
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// Open the codec
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#if LIBAVFORMAT_VERSION_INT < AV_VERSION_INT(53, 7, 0)
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if ( avcodec_open( mCodecContext, mCodec ) < 0 )
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#else
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if ( avcodec_open2( mCodecContext, mCodec, 0 ) < 0 )
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#endif
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Fatal( "Unable to open codec for video stream from %s", mPath.c_str() );
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// Allocate space for the native video frame
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mRawFrame = avcodec_alloc_frame();
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// Allocate space for the converted video frame
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mFrame = avcodec_alloc_frame();
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if(mRawFrame == NULL || mFrame == NULL)
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Fatal( "Unable to allocate frame for %s", mPath.c_str() );
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int pSize = avpicture_get_size( imagePixFormat, width, height );
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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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#if HAVE_LIBSWSCALE
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if(!sws_isSupportedInput(mCodecContext->pix_fmt)) {
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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));
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}
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if(!sws_isSupportedOutput(imagePixFormat)) {
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Fatal("swscale does not support the target format: %c%c%c%c",(imagePixFormat)&0xff,((imagePixFormat>>8)&0xff),((imagePixFormat>>16)&0xff),((imagePixFormat>>24)&0xff));
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}
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#else // HAVE_LIBSWSCALE
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Fatal( "You must compile ffmpeg with the --enable-swscale option to use ffmpeg cameras" );
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#endif // HAVE_LIBSWSCALE
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return( 0 );
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}
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int FfmpegCamera::PreCapture()
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{
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// Nothing to do here
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return( 0 );
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}
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int FfmpegCamera::Capture( Image &image )
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{
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AVPacket packet;
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uint8_t* directbuffer;
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/* Request a writeable buffer of the target image */
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directbuffer = image.WriteBuffer(width, height, colours, subpixelorder);
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if(directbuffer == NULL) {
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Error("Failed requesting writeable buffer for the captured image.");
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return (-1);
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}
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int frameComplete = false;
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while ( !frameComplete )
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{
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int avResult = av_read_frame( mFormatContext, &packet );
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if ( avResult < 0 )
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{
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Error( "Unable to read packet from stream %d: error %d", packet.stream_index, avResult );
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return( -1 );
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}
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Debug( 5, "Got packet from stream %d", packet.stream_index );
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if ( packet.stream_index == mVideoStreamId )
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{
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if ( avcodec_decode_video2( mCodecContext, mRawFrame, &frameComplete, &packet ) < 0 )
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Fatal( "Unable to decode frame at frame %d", frameCount );
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Debug( 4, "Decoded video packet at frame %d", frameCount );
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if ( frameComplete )
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{
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Debug( 3, "Got frame %d", frameCount );
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avpicture_fill( (AVPicture *)mFrame, directbuffer, imagePixFormat, width, height);
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#if HAVE_LIBSWSCALE
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if(mConvertContext == NULL) {
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if(config.cpu_extensions && sseversion >= 20) {
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mConvertContext = sws_getContext( mCodecContext->width, mCodecContext->height, mCodecContext->pix_fmt, width, height, imagePixFormat, SWS_BICUBIC | SWS_CPU_CAPS_SSE2, NULL, NULL, NULL );
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} else {
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mConvertContext = sws_getContext( mCodecContext->width, mCodecContext->height, mCodecContext->pix_fmt, width, height, imagePixFormat, SWS_BICUBIC, NULL, NULL, NULL );
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}
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if(mConvertContext == NULL)
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Fatal( "Unable to create conversion context for %s", mPath.c_str() );
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}
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if ( sws_scale( mConvertContext, mRawFrame->data, mRawFrame->linesize, 0, mCodecContext->height, mFrame->data, mFrame->linesize ) < 0 )
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Fatal( "Unable to convert raw format %u to target format %u at frame %d", mCodecContext->pix_fmt, imagePixFormat, frameCount );
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#else // HAVE_LIBSWSCALE
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Fatal( "You must compile ffmpeg with the --enable-swscale option to use ffmpeg cameras" );
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#endif // HAVE_LIBSWSCALE
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frameCount++;
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}
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}
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av_free_packet( &packet );
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}
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return (0);
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}
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int FfmpegCamera::PostCapture()
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{
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// Nothing to do here
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return( 0 );
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}
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#endif // HAVE_LIBAVFORMAT
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