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From Julen Garcia, "Here there is a small plugin I use to play video files. It is based on GStreamer http://gstreamer.freedesktop.org and I have used the FFmpeg plugin as inspiration."

Browse Source 
From Robert Osfield, fixed handled of row widths so that they are padded to a 4 byte boundary as certain row widths were being rendered incorrectly.


git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14604 16af8721-9629-0410-8352-f15c8da7e697
remotes/origin/OpenSceneGraph-3.4
Robert Osfield 10 years ago
parent 58c47e9842
commit 6cd9932780
8 changed files with 691 additions and 0 deletions
Show Stats Download Patch File Download Diff File

2
CMakeLists.txt
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@ -624,6 +624,8 @@ ELSE()
FIND_PACKAGE(LibVNCServer)
FIND_PACKAGE(OurDCMTK)
FIND_PACKAGE(FFmpeg)
FIND_PACKAGE(GStreamer COMPONENTS gstreamer-app gstreamer-pbutils)
FIND_PACKAGE(GLIB COMPONENTS gobject)
FIND_PACKAGE(DirectShow)
FIND_PACKAGE(SDL)
FIND_PACKAGE(Poppler-glib)

136
CMakeModules/FindGLIB.cmake
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# - Try to find Glib and its components (gio, gobject etc)
# Once done, this will define
#
# GLIB_FOUND - system has Glib
# GLIB_INCLUDE_DIRS - the Glib include directories
# GLIB_LIBRARIES - link these to use Glib
#
# Optionally, the COMPONENTS keyword can be passed to find_package()
# and Glib components can be looked for. Currently, the following
# components can be used, and they define the following variables if
# found:
#
# gio: GLIB_GIO_LIBRARIES
# gobject: GLIB_GOBJECT_LIBRARIES
# gmodule: GLIB_GMODULE_LIBRARIES
# gthread: GLIB_GTHREAD_LIBRARIES
#
# Note that the respective _INCLUDE_DIR variables are not set, since
# all headers are in the same directory as GLIB_INCLUDE_DIRS.
#
# Copyright (C) 2012 Raphael Kubo da Costa <rakuco@webkit.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND ITS CONTRIBUTORS ``AS
# IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR ITS
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
if (WIN32)
find_library(GLIB_LIBRARIES
NAMES glib-2.0
PATHS C:/gstreamer/1.0/x86_64/lib
)
else ()
find_package(PkgConfig)
pkg_check_modules(PC_GLIB QUIET glib-2.0)
find_library(GLIB_LIBRARIES
NAMES glib-2.0
HINTS ${PC_GLIB_LIBDIR}
${PC_GLIB_LIBRARY_DIRS}
)
endif ()
# Files in glib's main include path may include glibconfig.h, which,
# for some odd reason, is normally in $LIBDIR/glib-2.0/include.
get_filename_component(_GLIB_LIBRARY_DIR ${GLIB_LIBRARIES} PATH)
find_path(GLIBCONFIG_INCLUDE_DIR
NAMES glibconfig.h
HINTS ${PC_LIBDIR} ${PC_LIBRARY_DIRS} ${_GLIB_LIBRARY_DIR}
PATH_SUFFIXES glib-2.0/include
)
if (WIN32)
find_path(GLIB_INCLUDE_DIR
NAMES glib.h
PATHS C:/gstreamer/1.0/x86_64/include
PATH_SUFFIXES glib-2.0
)
else()
find_path(GLIB_INCLUDE_DIR
NAMES glib.h
HINTS ${PC_GLIB_INCLUDEDIR}
${PC_GLIB_INCLUDE_DIRS}
PATH_SUFFIXES glib-2.0
)
endif()
set(GLIB_INCLUDE_DIRS ${GLIB_INCLUDE_DIR} ${GLIBCONFIG_INCLUDE_DIR})
# Version detection
file(READ "${GLIBCONFIG_INCLUDE_DIR}/glibconfig.h" GLIBCONFIG_H_CONTENTS)
string(REGEX MATCH "#define GLIB_MAJOR_VERSION ([0-9]+)" _dummy "${GLIBCONFIG_H_CONTENTS}")
set(GLIB_VERSION_MAJOR "${CMAKE_MATCH_1}")
string(REGEX MATCH "#define GLIB_MINOR_VERSION ([0-9]+)" _dummy "${GLIBCONFIG_H_CONTENTS}")
set(GLIB_VERSION_MINOR "${CMAKE_MATCH_1}")
string(REGEX MATCH "#define GLIB_MICRO_VERSION ([0-9]+)" _dummy "${GLIBCONFIG_H_CONTENTS}")
set(GLIB_VERSION_MICRO "${CMAKE_MATCH_1}")
set(GLIB_VERSION "${GLIB_VERSION_MAJOR}.${GLIB_VERSION_MINOR}.${GLIB_VERSION_MICRO}")
# Additional Glib components. We only look for libraries, as not all of them
# have corresponding headers and all headers are installed alongside the main
# glib ones.
foreach (_component ${GLIB_FIND_COMPONENTS})
if (${_component} STREQUAL "gio")
find_library(GLIB_GIO_LIBRARIES NAMES gio-2.0 HINTS ${_GLIB_LIBRARY_DIR})
set(ADDITIONAL_REQUIRED_VARS ${ADDITIONAL_REQUIRED_VARS} GLIB_GIO_LIBRARIES)
elseif (${_component} STREQUAL "gobject")
find_library(GLIB_GOBJECT_LIBRARIES NAMES gobject-2.0 HINTS ${_GLIB_LIBRARY_DIR})
set(ADDITIONAL_REQUIRED_VARS ${ADDITIONAL_REQUIRED_VARS} GLIB_GOBJECT_LIBRARIES)
elseif (${_component} STREQUAL "gmodule")
find_library(GLIB_GMODULE_LIBRARIES NAMES gmodule-2.0 HINTS ${_GLIB_LIBRARY_DIR})
set(ADDITIONAL_REQUIRED_VARS ${ADDITIONAL_REQUIRED_VARS} GLIB_GMODULE_LIBRARIES)
elseif (${_component} STREQUAL "gthread")
find_library(GLIB_GTHREAD_LIBRARIES NAMES gthread-2.0 HINTS ${_GLIB_LIBRARY_DIR})
set(ADDITIONAL_REQUIRED_VARS ${ADDITIONAL_REQUIRED_VARS} GLIB_GTHREAD_LIBRARIES)
elseif (${_component} STREQUAL "gio-unix")
# gio-unix is compiled as part of the gio library, but the include paths
# are separate from the shared glib ones. Since this is currently only used
# by WebKitGTK+ we don't go to extraordinary measures beyond pkg-config.
pkg_check_modules(GIO_UNIX QUIET gio-unix-2.0)
endif ()
endforeach ()
include(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(GLIB REQUIRED_VARS GLIB_INCLUDE_DIRS GLIB_LIBRARIES ${ADDITIONAL_REQUIRED_VARS}
VERSION_VAR GLIB_VERSION)
mark_as_advanced(
GLIBCONFIG_INCLUDE_DIR
GLIB_GIO_LIBRARIES
GLIB_GIO_UNIX_LIBRARIES
GLIB_GMODULE_LIBRARIES
GLIB_GOBJECT_LIBRARIES
GLIB_GTHREAD_LIBRARIES
GLIB_INCLUDE_DIR
GLIB_INCLUDE_DIRS
GLIB_LIBRARIES
)

174
CMakeModules/FindGStreamer.cmake
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@ -0,0 +1,174 @@
# - Try to find GStreamer and its plugins
# Once done, this will define
#
# GSTREAMER_FOUND - system has GStreamer
# GSTREAMER_INCLUDE_DIRS - the GStreamer include directories
# GSTREAMER_LIBRARIES - link these to use GStreamer
#
# Additionally, gstreamer-base is always looked for and required, and
# the following related variables are defined:
#
# GSTREAMER_BASE_INCLUDE_DIRS - gstreamer-base's include directory
# GSTREAMER_BASE_LIBRARIES - link to these to use gstreamer-base
#
# Optionally, the COMPONENTS keyword can be passed to find_package()
# and GStreamer plugins can be looked for. Currently, the following
# plugins can be searched, and they define the following variables if
# found:
#
# gstreamer-app: GSTREAMER_APP_INCLUDE_DIRS and GSTREAMER_APP_LIBRARIES
# gstreamer-audio: GSTREAMER_AUDIO_INCLUDE_DIRS and GSTREAMER_AUDIO_LIBRARIES
# gstreamer-fft: GSTREAMER_FFT_INCLUDE_DIRS and GSTREAMER_FFT_LIBRARIES
# gstreamer-pbutils: GSTREAMER_PBUTILS_INCLUDE_DIRS and GSTREAMER_PBUTILS_LIBRARIES
# gstreamer-video: GSTREAMER_VIDEO_INCLUDE_DIRS and GSTREAMER_VIDEO_LIBRARIES
#
# Copyright (C) 2012 Raphael Kubo da Costa <rakuco@webkit.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND ITS CONTRIBUTORS ``AS
# IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR ITS
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# Helper macro to find a GStreamer plugin (or GStreamer itself)
# _component_prefix is prepended to the _INCLUDE_DIRS and _LIBRARIES variables (eg. "GSTREAMER_AUDIO")
# _pkgconfig_name is the component's pkg-config name (eg. "gstreamer-1.0", or "gstreamer-video-1.0").
# _header is the component's header, relative to the gstreamer-1.0 directory (eg. "gst/gst.h").
# _library is the component's library name (eg. "gstreamer-1.0" or "gstvideo-1.0")
#macro(FIND_GSTREAMER_COMPONENT _component_prefix _pkgconfig_name _header _library)
# pkg_check_modules(PC_${_component_prefix} QUIET ${_pkgconfig_name})
#
# find_path(${_component_prefix}_INCLUDE_DIRS
# NAMES ${_header}
# HINTS ${PC_${_component_prefix}_INCLUDE_DIRS} ${PC_${_component_prefix}_INCLUDEDIR}
# PATH_SUFFIXES gstreamer-1.0
# )
#
# find_library(${_component_prefix}_LIBRARIES
# NAMES ${_library}
# HINTS ${PC_${_component_prefix}_LIBRARY_DIRS} ${PC_${_component_prefix}_LIBDIR}
# )
#endmacro()
if (WIN32)
macro(FIND_GSTREAMER_COMPONENT _component_prefix _pkgconfig_name _header _library)
find_path(${_component_prefix}_INCLUDE_DIRS
NAMES ${_header}
PATHS C:/gstreamer/1.0/x86_64/include
PATH_SUFFIXES gstreamer-1.0
)
find_library(${_component_prefix}_LIBRARIES
NAMES ${_library}
PATHS C:/gstreamer/1.0/x86_64/lib
)
endmacro()
else ()
find_package(PkgConfig)
macro(FIND_GSTREAMER_COMPONENT _component_prefix _pkgconfig_name _header _library)
pkg_check_modules(PC_${_component_prefix} QUIET ${_pkgconfig_name})
find_path(${_component_prefix}_INCLUDE_DIRS
NAMES ${_header}
HINTS ${PC_${_component_prefix}_INCLUDE_DIRS} ${PC_${_component_prefix}_INCLUDEDIR}
PATH_SUFFIXES gstreamer-1.0
)
find_library(${_component_prefix}_LIBRARIES
NAMES ${_library}
HINTS ${PC_${_component_prefix}_LIBRARY_DIRS} ${PC_${_component_prefix}_LIBDIR}
)
endmacro()
endif ()
# ------------------------
# 1. Find GStreamer itself
# ------------------------
# 1.1. Find headers and libraries
FIND_GSTREAMER_COMPONENT(GSTREAMER gstreamer-1.0 gst/gst.h gstreamer-1.0)
#FIND_GSTREAMER_COMPONENT(GSTREAMER_BASE gstreamer-base-1.0 gst/gst.h gstbase-1.0)
# 1.2. Check GStreamer version
if (GSTREAMER_INCLUDE_DIRS)
if (EXISTS "${GSTREAMER_INCLUDE_DIRS}/gst/gstversion.h")
file(READ "${GSTREAMER_INCLUDE_DIRS}/gst/gstversion.h" GSTREAMER_VERSION_CONTENTS)
string(REGEX MATCH "#define +GST_VERSION_MAJOR +\\(([0-9]+)\\)" _dummy "${GSTREAMER_VERSION_CONTENTS}")
set(GSTREAMER_VERSION_MAJOR "${CMAKE_MATCH_1}")
string(REGEX MATCH "#define +GST_VERSION_MINOR +\\(([0-9]+)\\)" _dummy "${GSTREAMER_VERSION_CONTENTS}")
set(GSTREAMER_VERSION_MINOR "${CMAKE_MATCH_1}")
string(REGEX MATCH "#define +GST_VERSION_MICRO +\\(([0-9]+)\\)" _dummy "${GSTREAMER_VERSION_CONTENTS}")
set(GSTREAMER_VERSION_MICRO "${CMAKE_MATCH_1}")
set(GSTREAMER_VERSION "${GSTREAMER_VERSION_MAJOR}.${GSTREAMER_VERSION_MINOR}.${GSTREAMER_VERSION_MICRO}")
endif ()
endif ()
if ("${GStreamer_FIND_VERSION}" VERSION_GREATER "${GSTREAMER_VERSION}")
message(FATAL_ERROR "Required version (" ${GStreamer_FIND_VERSION} ") is higher than found version (" ${GSTREAMER_VERSION} ")")
endif ()
# -------------------------
# 2. Find GStreamer plugins
# -------------------------
FIND_GSTREAMER_COMPONENT(GSTREAMER_APP gstreamer-app-1.0 gst/app/gstappsink.h gstapp-1.0)
FIND_GSTREAMER_COMPONENT(GSTREAMER_AUDIO gstreamer-audio-1.0 gst/audio/audio.h gstaudio-1.0)
FIND_GSTREAMER_COMPONENT(GSTREAMER_FFT gstreamer-fft-1.0 gst/fft/gstfft.h gstfft-1.0)
FIND_GSTREAMER_COMPONENT(GSTREAMER_PBUTILS gstreamer-pbutils-1.0 gst/pbutils/pbutils.h gstpbutils-1.0)
FIND_GSTREAMER_COMPONENT(GSTREAMER_VIDEO gstreamer-video-1.0 gst/video/video.h gstvideo-1.0)
# ------------------------------------------------
# 3. Process the COMPONENTS passed to FIND_PACKAGE
# ------------------------------------------------
set(_GSTREAMER_REQUIRED_VARS GSTREAMER_INCLUDE_DIRS GSTREAMER_LIBRARIES GSTREAMER_VERSION GSTREAMER_BASE_INCLUDE_DIRS GSTREAMER_BASE_LIBRARIES)
foreach (_component ${GStreamer_FIND_COMPONENTS})
set(_gst_component "GSTREAMER_${_component}")
string(TOUPPER ${_gst_component} _UPPER_NAME)
list(APPEND _GSTREAMER_REQUIRED_VARS ${_UPPER_NAME}_INCLUDE_DIRS ${_UPPER_NAME}_LIBRARIES)
endforeach ()
include(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(GStreamer REQUIRED_VARS _GSTREAMER_REQUIRED_VARS
VERSION_VAR GSTREAMER_VERSION)
mark_as_advanced(
GSTREAMER_APP_INCLUDE_DIRS
GSTREAMER_APP_LIBRARIES
GSTREAMER_AUDIO_INCLUDE_DIRS
GSTREAMER_AUDIO_LIBRARIES
GSTREAMER_BASE_INCLUDE_DIRS
GSTREAMER_BASE_LIBRARIES
GSTREAMER_FFT_INCLUDE_DIRS
GSTREAMER_FFT_LIBRARIES
GSTREAMER_INCLUDE_DIRS
GSTREAMER_LIBRARIES
GSTREAMER_PBUTILS_INCLUDE_DIRS
GSTREAMER_PBUTILS_LIBRARIES
GSTREAMER_VIDEO_INCLUDE_DIRS
GSTREAMER_VIDEO_LIBRARIES
)

4
src/osgPlugins/CMakeLists.txt
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@ -200,6 +200,10 @@ IF(FFMPEG_FOUND AND OSG_CPP_EXCEPTIONS_AVAILABLE)
ADD_SUBDIRECTORY(ffmpeg)
ENDIF()
IF(GSTREAMER_FOUND AND GLIB_FOUND)
ADD_SUBDIRECTORY(gstreamer)
ENDIF()
IF(DIRECTSHOW_FOUND)
ADD_SUBDIRECTORY(directshow)
ENDIF()

24
src/osgPlugins/gstreamer/CMakeLists.txt
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INCLUDE_DIRECTORIES(
${GSTREAMER_INCLUDE_DIRS}
${GLIB_INCLUDE_DIRS}
)
SET(TARGET_EXTERNAL_LIBRARIES
${GSTREAMER_LIBRARIES}
${GSTREAMER_APP_LIBRARIES}
${GSTREAMER_PBUTILS_LIBRARIES}
${GLIB_LIBRARIES}
${GLIB_GOBJECT_LIBRARIES}
)
SET(TARGET_SRC
GStreamerImageStream.cpp
ReaderWriterGStreamer.cpp
)
SET(TARGET_H
GStreamerImageStream.hpp
)
#### end var setup ###
SETUP_PLUGIN(gstreamer)

221
src/osgPlugins/gstreamer/GStreamerImageStream.cpp
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#include "GStreamerImageStream.hpp"
namespace osgGStreamer {
GStreamerImageStream::GStreamerImageStream()
{
setOrigin(osg::Image::TOP_LEFT);
loop = g_main_loop_new(NULL, FALSE);
}
GStreamerImageStream::GStreamerImageStream(const GStreamerImageStream & image, const osg::CopyOp & copyop) :
osg::ImageStream(image, copyop)
{
// TODO: probably incorrect or incomplete
}
GStreamerImageStream::~GStreamerImageStream()
{
OSG_INFO<<"Destructing GStreamerImageStream..."<<std::endl;
gst_element_set_state(pipeline, GST_STATE_NULL);
gst_element_get_state(pipeline, NULL, NULL, GST_CLOCK_TIME_NONE); //wait until the state changed
g_main_loop_quit(loop);
g_main_loop_unref(loop);
free(internal_buffer);
}
bool GStreamerImageStream::open(const std::string &filename)
{
setFileName(filename);
GError *error = NULL;
// get stream info
bool has_audio_stream = false;
GstDiscoverer *item = gst_discoverer_new(1*GST_SECOND, &error);
gchar *uri = g_filename_to_uri(filename.c_str(), NULL, NULL);
if( gst_uri_is_valid(uri) )
{
GstDiscovererInfo *info = gst_discoverer_discover_uri(item, uri, &error);
GList *audio_list = gst_discoverer_info_get_audio_streams(info);
if( g_list_length(audio_list) > 0 )
has_audio_stream = true;
gst_discoverer_info_unref(info);
g_free(uri);
}
// build pipeline
gchar *audio_pipe = "";
if( has_audio_stream )
audio_pipe = "deco. ! queue ! audioconvert ! autoaudiosink";
gchar *string = g_strdup_printf("filesrc location=%s ! \
decodebin name=deco \
deco. ! queue ! videoconvert ! video/x-raw,format=RGB ! appsink name=sink emit-signals=true \
%s", filename.c_str(), audio_pipe);
pipeline = gst_parse_launch(string, &error);
if( pipeline == NULL )
{
g_printerr("Error: %s\n", error->message);
return false;
}
g_free(string);
g_error_free(error);
// bus
GstBus *bus = gst_pipeline_get_bus(GST_PIPELINE(pipeline));
gst_bus_add_watch(bus, (GstBusFunc)on_message, this);
gst_object_unref(bus);
// sink
GstElement *sink = gst_bin_get_by_name(GST_BIN(pipeline), "sink");
g_signal_connect(sink, "new-sample", G_CALLBACK(on_new_sample), this);
g_signal_connect(sink, "new-preroll", G_CALLBACK(on_new_preroll), this);
gst_object_unref(sink);
gst_element_set_state(pipeline, GST_STATE_PAUSED);
gst_element_get_state(pipeline, NULL, NULL, GST_CLOCK_TIME_NONE); // wait until the state changed
//setPixelBufferObject(new osg::PixelBufferObject(this)); // can help with the performance
setImage(width, height, 1, GL_RGB, GL_RGB, GL_UNSIGNED_BYTE, internal_buffer, osg::Image::NO_DELETE);
start();
return true;
}
//** Controls **
void GStreamerImageStream::play()
{
gst_element_set_state(pipeline, GST_STATE_PLAYING);
}
void GStreamerImageStream::pause()
{
gst_element_set_state(pipeline, GST_STATE_PAUSED);
}
void GStreamerImageStream::rewind()
{
gst_element_seek_simple(pipeline, GST_FORMAT_TIME, GstSeekFlags(GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_KEY_UNIT), 0);
}
void GStreamerImageStream::seek(double time)
{
gst_element_seek_simple(pipeline, GST_FORMAT_TIME, GstSeekFlags(GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_KEY_UNIT), time * GST_MSECOND);
}
int GStreamerImageStream::s() const
{
return width;
}
int GStreamerImageStream::t() const
{
return height;
}
//** Callback implementations **
GstFlowReturn GStreamerImageStream::on_new_sample(GstAppSink *appsink, GStreamerImageStream *user_data)
{
// get the buffer from appsink
GstSample *sample = gst_app_sink_pull_sample(appsink);
GstBuffer *buffer = gst_sample_get_buffer(sample);
// upload data
GstMapInfo info;
gst_buffer_map(buffer, &info, GST_MAP_READ);
gst_buffer_extract(buffer, 0, user_data->internal_buffer, info.size);
OSG_NOTICE<<"on_new_sample("<<(user_data->width)<<", "<<(user_data->height)<<")"<<std::endl;
user_data->setImage(user_data->width, user_data->height, 1, GL_RGB, GL_RGB, GL_UNSIGNED_BYTE, user_data->internal_buffer, osg::Image::NO_DELETE, 4);
// clean resources
gst_buffer_unmap(buffer, &info);
gst_sample_unref(sample);
return GST_FLOW_OK;
}
GstFlowReturn GStreamerImageStream::on_new_preroll(GstAppSink *appsink, GStreamerImageStream *user_data)
{
// get the sample from appsink
GstSample *sample = gst_app_sink_pull_preroll(appsink);
// get sample info
GstCaps *caps = gst_sample_get_caps(sample);
GstStructure *structure = gst_caps_get_structure(caps, 0);
int width;
int height;
gst_structure_get_int(structure, "width", &width);
gst_structure_get_int(structure, "height", &height);
user_data->width = width;
user_data->height = height;
int row_width = width*3;
if ((row_width%4)!=0)
{
OSG_NOTICE<<"Rounding up row width from "<<row_width<<" to ";
row_width += (4-(row_width%4));
OSG_NOTICE<<row_width<<std::endl;;
}
user_data->internal_buffer = (unsigned char*)malloc(sizeof(unsigned char)*row_width*height);
OSG_NOTICE<<"on_new_preroll("<<(user_data->width)<<", "<<(user_data->height)<<")"<<std::endl;
// clean resources
gst_sample_unref(sample);
return GST_FLOW_OK;
}
gboolean GStreamerImageStream::on_message(GstBus *bus, GstMessage *message, GStreamerImageStream *user_data)
{
if( GST_MESSAGE_TYPE(message) == GST_MESSAGE_EOS)
{
user_data->rewind();
}
return TRUE;
}
void GStreamerImageStream::run()
{
g_main_loop_run(loop);
}
} // namespace osgGStreamer

53
src/osgPlugins/gstreamer/GStreamerImageStream.hpp
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@ -0,0 +1,53 @@
#ifndef HEADER_GUARD_OSGGSTREAMER_GSTREAMER_IMAGE_STREAM_H
#define HEADER_GUARD_OSGGSTREAMER_GSTREAMER_IMAGE_STREAM_H
#include <gst/app/gstappsink.h>
#include <gst/pbutils/pbutils.h>
#include <osg/ImageStream>
#include <OpenThreads/Thread>
namespace osgGStreamer {
class GStreamerImageStream : public osg::ImageStream, public OpenThreads::Thread
{
public:
GStreamerImageStream();
GStreamerImageStream(const GStreamerImageStream & image, const osg::CopyOp & copyop = osg::CopyOp::SHALLOW_COPY);
META_Object(osgGStreamer, GStreamerImageStream);
bool open(const std::string &filename);
virtual void play();
virtual void pause();
virtual void rewind();
virtual void seek(double time);
virtual int s() const;
virtual int t() const;
private:
virtual ~GStreamerImageStream();
static gboolean on_message(GstBus *bus, GstMessage *message, GStreamerImageStream *user_data);
static GstFlowReturn on_new_sample(GstAppSink *appsink, GStreamerImageStream *user_data);
static GstFlowReturn on_new_preroll(GstAppSink *appsink, GStreamerImageStream *user_data);
virtual void run();
GMainLoop *loop;
GstElement *pipeline;
unsigned char *internal_buffer;
int width;
int height;
};
}
#endif // HEADER_GUARD_OSGGSTREAMER_GSTREAMER_IMAGE_STREAM_H

77
src/osgPlugins/gstreamer/ReaderWriterGStreamer.cpp
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@ -0,0 +1,77 @@
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2010 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library 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
* OpenSceneGraph Public License for more details.
*/
#include "GStreamerImageStream.hpp"
#include <osgDB/Registry>
#include <osgDB/FileNameUtils>
#include <osgDB/FileUtils>
class ReaderWriterGStreamer : public osgDB::ReaderWriter
{
public:
ReaderWriterGStreamer()
{
supportsExtension("avi", "");
supportsExtension("flv", "Flash video");
supportsExtension("mov", "Quicktime");
supportsExtension("ogg", "Theora movie format");
supportsExtension("mpg", "Mpeg movie format");
supportsExtension("mpv", "Mpeg movie format");
supportsExtension("wmv", "Windows Media Video format");
supportsExtension("mkv", "Matroska");
supportsExtension("mjpeg", "Motion JPEG");
supportsExtension("mp4", "MPEG-4");
supportsExtension("m4v", "MPEG-4");
supportsExtension("sav", "Unknown");
supportsExtension("3gp", "3G multi-media format");
supportsExtension("sdp", "Session Description Protocol");
supportsExtension("m2ts", "MPEG-2 Transport Stream");
gst_init(NULL, NULL);
}
virtual ~ReaderWriterGStreamer()
{
}
virtual const char * className() const
{
return "ReaderWriterGStreamer";
}
virtual ReadResult readImage(const std::string & filename, const osgDB::ReaderWriter::Options* options) const
{
const std::string ext = osgDB::getLowerCaseFileExtension(filename);
if (!acceptsExtension(ext)) return ReadResult::FILE_NOT_HANDLED;
const std::string path = osgDB::containsServerAddress(filename) ?
filename :
osgDB::findDataFile(filename, options);
if (path.empty()) return ReadResult::FILE_NOT_FOUND;
osg::ref_ptr<osgGStreamer::GStreamerImageStream> imageStream = new osgGStreamer::GStreamerImageStream();
if (!imageStream->open(filename)) return ReadResult::FILE_NOT_HANDLED;
return imageStream.release();
}
};
REGISTER_OSGPLUGIN(gstreamer, ReaderWriterGStreamer)
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