FGFS-4.1/OpenSceneGraph
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Added quick proof of concept for live video streaming under linux

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This commit is contained in:
Robert Osfield 2009-03-05 10:57:54 +00:00
parent 56330d5b29
commit fa14e7d5f2
3 changed files with 49 additions and 6 deletions
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39
src/osgPlugins/ffmpeg/FFmpegDecoder.cpp
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@ -35,7 +35,6 @@ FFmpegDecoder::~FFmpegDecoder()
}
bool FFmpegDecoder::open(const std::string & filename)
{
try
@ -43,9 +42,43 @@ bool FFmpegDecoder::open(const std::string & filename)
// Open video file
AVFormatContext * p_format_context = 0;
if (av_open_input_file(&p_format_context, filename.c_str(), 0, 0, 0) != 0)
throw std::runtime_error("av_open_input_file() failed");
if (filename.compare(0, 5, "/dev/")==0)
{
avdevice_register_all();
osg::notify(osg::NOTICE)<<"Attempting to stream "<<filename<<std::endl;
AVFormatParameters formatParams;
memset(&formatParams, 0, sizeof(AVFormatParameters));
AVInputFormat *iformat;
formatParams.channel = 0;
formatParams.standard = 0;
formatParams.width = 640;
formatParams.height = 480;
formatParams.time_base.num = 1;
formatParams.time_base.den = 50;
iformat = av_find_input_format("video4linux2");
if (iformat)
{
osg::notify(osg::NOTICE)<<"Found input format"<<std::endl;
}
else
{
osg::notify(osg::NOTICE)<<"Failed to find input_format"<<std::endl;
}
if (av_open_input_file(&p_format_context, filename.c_str(), iformat, 0, &formatParams) != 0)
throw std::runtime_error("av_open_input_file() failed");
}
else
{
if (av_open_input_file(&p_format_context, filename.c_str(), 0, 0, 0) !=0 )
throw std::runtime_error("av_open_input_file() failed");
}
m_format_context.reset(p_format_context);
// Retrieve stream info

1
src/osgPlugins/ffmpeg/FFmpegHeaders.hpp
View File

@ -9,6 +9,7 @@ extern "C"
#include <stdint.h>
#include <avcodec.h>
#include <avformat.h>
#include <avdevice.h>
#ifdef USE_SWSCALE
#include <swscale.h>

15
src/osgPlugins/ffmpeg/ReaderWriterFFmpeg.cpp
View File

@ -40,8 +40,12 @@ public:
virtual ReadResult readImage(const std::string & filename, const osgDB::ReaderWriter::Options * options) const
{
if (filename.compare(0, 5, "/dev/")==0)
{
return readImageStream(filename, options);
}
const std::string ext = osgDB::getLowerCaseFileExtension(filename);
if (! acceptsExtension(ext))
return ReadResult::FILE_NOT_HANDLED;
@ -52,11 +56,16 @@ public:
if (path.empty())
return ReadResult::FILE_NOT_FOUND;
osg::notify(osg::INFO) << "ReaderWriterFFmpeg::readImage " << path << std::endl;
return readImageStream(filename, options);
}
ReadResult readImageStream(const std::string& filename, const osgDB::ReaderWriter::Options * options) const
{
osg::notify(osg::INFO) << "ReaderWriterFFmpeg::readImage " << filename << std::endl;
osg::ref_ptr<osgFFmpeg::FFmpegImageStream> image_stream(new osgFFmpeg::FFmpegImageStream);
if (! image_stream->open(path))
if (! image_stream->open(filename))
return ReadResult::FILE_NOT_HANDLED;
return image_stream.release();