LCOV - code coverage report
Current view: top level - avmedia/source/gstreamer - gstframegrabber.cxx (source / functions) Hit Total Coverage
Test: commit e02a6cb2c3e2b23b203b422e4e0680877f232636 Lines: 0 77 0.0 %
Date: 2014-04-14 Functions: 0 9 0.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #include "gstframegrabber.hxx"
      21             : #include "gstplayer.hxx"
      22             : 
      23             : #include <cppuhelper/supportsservice.hxx>
      24             : 
      25             : #include <gst/gstbuffer.h>
      26             : #include <gst/video/video.h>
      27             : #include <gst/video/gstvideosink.h>
      28             : 
      29             : #include <vcl/graph.hxx>
      30             : #include <vcl/bmpacc.hxx>
      31             : 
      32             : #include <string>
      33             : 
      34             : #ifdef AVMEDIA_GST_0_10
      35             : #  define AVMEDIA_GST_FRAMEGRABBER_IMPLEMENTATIONNAME "com.sun.star.comp.avmedia.FrameGrabber_GStreamer_0_10"
      36             : #  define AVMEDIA_GST_FRAMEGRABBER_SERVICENAME "com.sun.star.media.FrameGrabber_GStreamer_0_10"
      37             : #else
      38             : #  define AVMEDIA_GST_FRAMEGRABBER_IMPLEMENTATIONNAME "com.sun.star.comp.avmedia.FrameGrabber_GStreamer"
      39             : #  define AVMEDIA_GST_FRAMEGRABBER_SERVICENAME "com.sun.star.media.FrameGrabber_GStreamer"
      40             : #endif
      41             : 
      42             : using namespace ::com::sun::star;
      43             : 
      44             : namespace avmedia { namespace gstreamer {
      45             : 
      46           0 : void FrameGrabber::disposePipeline()
      47             : {
      48           0 :     if( mpPipeline != NULL )
      49             :     {
      50           0 :         gst_element_set_state( mpPipeline, GST_STATE_NULL );
      51           0 :         g_object_unref( G_OBJECT( mpPipeline ) );
      52           0 :         mpPipeline = NULL;
      53             :     }
      54           0 : }
      55             : 
      56           0 : FrameGrabber::FrameGrabber( const OUString &rURL ) :
      57           0 :     FrameGrabber_BASE()
      58             : {
      59             :     gchar *pPipelineStr;
      60             :     pPipelineStr = g_strdup_printf(
      61             : #ifdef AVMEDIA_GST_0_10
      62             :         "uridecodebin uri=%s ! ffmpegcolorspace ! videoscale ! appsink "
      63             :         "name=sink caps=\"video/x-raw-rgb,format=RGB,pixel-aspect-ratio=1/1,"
      64             :         "bpp=(int)24,depth=(int)24,endianness=(int)4321,"
      65             :         "red_mask=(int)0xff0000, green_mask=(int)0x00ff00, blue_mask=(int)0x0000ff\"",
      66             : #else
      67             :         "uridecodebin uri=%s ! videoconvert ! videoscale ! appsink "
      68             :         "name=sink caps=\"video/x-raw,format=RGB,pixel-aspect-ratio=1/1\"",
      69             : #endif
      70           0 :         OUStringToOString( rURL, RTL_TEXTENCODING_UTF8 ).getStr() );
      71             : 
      72           0 :     GError *pError = NULL;
      73           0 :     mpPipeline = gst_parse_launch( pPipelineStr, &pError );
      74           0 :     if( pError != NULL) {
      75           0 :         g_warning( "Failed to construct frame-grabber pipeline '%s'\n", pError->message );
      76           0 :         g_error_free( pError );
      77           0 :         disposePipeline();
      78             :     }
      79             : 
      80           0 :     if( mpPipeline ) {
      81             :         // pre-roll
      82           0 :         switch( gst_element_set_state( mpPipeline, GST_STATE_PAUSED ) ) {
      83             :         case GST_STATE_CHANGE_FAILURE:
      84             :         case GST_STATE_CHANGE_NO_PREROLL:
      85           0 :             g_warning( "failure pre-rolling media" );
      86           0 :             disposePipeline();
      87           0 :             break;
      88             :         default:
      89           0 :             break;
      90             :         }
      91             :     }
      92           0 :     if( mpPipeline &&
      93           0 :         gst_element_get_state( mpPipeline, NULL, NULL, 5 * GST_SECOND ) == GST_STATE_CHANGE_FAILURE )
      94           0 :         disposePipeline();
      95           0 : }
      96             : 
      97           0 : FrameGrabber::~FrameGrabber()
      98             : {
      99           0 :     disposePipeline();
     100           0 : }
     101             : 
     102           0 : FrameGrabber* FrameGrabber::create( const OUString &rURL )
     103             : {
     104           0 :     return new FrameGrabber( rURL );
     105             : }
     106             : 
     107           0 : uno::Reference< graphic::XGraphic > SAL_CALL FrameGrabber::grabFrame( double fMediaTime )
     108             :     throw (uno::RuntimeException, std::exception)
     109             : {
     110           0 :     uno::Reference< graphic::XGraphic > xRet;
     111             : 
     112           0 :     if( !mpPipeline )
     113           0 :         return xRet;
     114             : 
     115           0 :     gint64 gst_position = llround( fMediaTime * 1E9 );
     116             :     gst_element_seek_simple(
     117             :         mpPipeline, GST_FORMAT_TIME,
     118             :         (GstSeekFlags)(GST_SEEK_FLAG_KEY_UNIT | GST_SEEK_FLAG_FLUSH),
     119           0 :         gst_position );
     120             : 
     121           0 :     GstElement *pSink = gst_bin_get_by_name( GST_BIN( mpPipeline ), "sink" );
     122           0 :     if( !pSink )
     123           0 :         return xRet;
     124             : 
     125           0 :     GstBuffer *pBuf = NULL;
     126           0 :     GstCaps *pCaps = NULL;
     127             : 
     128             :     // synchronously fetch the frame
     129             : #ifdef AVMEDIA_GST_0_10
     130           0 :     g_signal_emit_by_name( pSink, "pull-preroll", &pBuf, NULL );
     131           0 :     if( pBuf )
     132           0 :         pCaps = GST_BUFFER_CAPS( pBuf );
     133             : #else
     134             :     GstSample *pSample = NULL;
     135             :     g_signal_emit_by_name( pSink, "pull-preroll", &pSample, NULL );
     136             : 
     137             :     if( pSample )
     138             :     {
     139             :         pBuf = gst_sample_get_buffer( pSample );
     140             :         pCaps = gst_sample_get_caps( pSample );
     141             :     }
     142             : #endif
     143             : 
     144             :     // get geometry
     145           0 :     int nWidth = 0, nHeight = 0;
     146           0 :     if( !pCaps )
     147           0 :         g_warning( "could not get snapshot format\n" );
     148             :     else
     149             :     {
     150           0 :         GstStructure *pStruct = gst_caps_get_structure( pCaps, 0 );
     151             : 
     152             :         /* we need to get the final caps on the buffer to get the size */
     153           0 :         if( !gst_structure_get_int( pStruct, "width", &nWidth ) ||
     154           0 :             !gst_structure_get_int( pStruct, "height", &nHeight ) )
     155           0 :             nWidth = nHeight = 0;
     156             :     }
     157             : 
     158           0 :     if( pBuf && nWidth > 0 && nHeight > 0 &&
     159             :         // sanity check the size
     160             : #ifdef AVMEDIA_GST_0_10
     161           0 :         GST_BUFFER_SIZE( pBuf ) >= static_cast<unsigned>( nWidth * nHeight * 3 )
     162             : #else
     163             :         gst_buffer_get_size( pBuf ) >= static_cast<unsigned>( nWidth * nHeight * 3 )
     164             : #endif
     165             :         )
     166             :     {
     167           0 :         sal_uInt8 *pData = NULL;
     168             : #ifdef AVMEDIA_GST_0_10
     169           0 :         pData = GST_BUFFER_DATA( pBuf );
     170             : #else
     171             :         GstMapInfo aMapInfo;
     172             :         gst_buffer_map( pBuf, &aMapInfo, GST_MAP_READ );
     173             :         pData = aMapInfo.data;
     174             : #endif
     175             : 
     176           0 :         int nStride = GST_ROUND_UP_4( nWidth * 3 );
     177           0 :         Bitmap aBmp( Size( nWidth, nHeight ), 24 );
     178             : 
     179           0 :         BitmapWriteAccess *pWrite = aBmp.AcquireWriteAccess();
     180           0 :         if( pWrite )
     181             :         {
     182             :             // yet another cheesy pixel copying loop
     183           0 :             for( int y = 0; y < nHeight; ++y )
     184             :             {
     185           0 :                 sal_uInt8 *p = pData + y * nStride;
     186           0 :                 for( int x = 0; x < nWidth; ++x )
     187             :                 {
     188           0 :                     BitmapColor col( p[0], p[1], p[2] );
     189           0 :                     pWrite->SetPixel( y, x, col );
     190           0 :                     p += 3;
     191           0 :                 }
     192             :             }
     193             :         }
     194           0 :         aBmp.ReleaseAccess( pWrite );
     195             : 
     196             : #ifndef AVMEDIA_GST_0_10
     197             :         gst_buffer_unmap( pBuf, &aMapInfo );
     198             : #endif
     199             : 
     200           0 :         xRet = Graphic( aBmp ).GetXGraphic();
     201             :     }
     202             : 
     203           0 :     return xRet;
     204             : }
     205             : 
     206           0 : OUString SAL_CALL FrameGrabber::getImplementationName(  )
     207             :     throw (uno::RuntimeException, std::exception)
     208             : {
     209           0 :     return OUString( AVMEDIA_GST_FRAMEGRABBER_IMPLEMENTATIONNAME );
     210             : }
     211             : 
     212           0 : sal_Bool SAL_CALL FrameGrabber::supportsService( const OUString& ServiceName )
     213             :     throw (uno::RuntimeException, std::exception)
     214             : {
     215           0 :     return cppu::supportsService(this, ServiceName);
     216             : }
     217             : 
     218           0 : uno::Sequence< OUString > SAL_CALL FrameGrabber::getSupportedServiceNames()
     219             :     throw (uno::RuntimeException, std::exception)
     220             : {
     221           0 :     uno::Sequence< OUString > aRet(1);
     222           0 :     aRet[0] = AVMEDIA_GST_FRAMEGRABBER_SERVICENAME;
     223             : 
     224           0 :     return aRet;
     225             : }
     226             : 
     227             : } // namespace gstreamer
     228             : } // namespace avmedia
     229             : 
     230             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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