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Added support for using SDL2 to the osgmovie to enable it to handle floating point audio formats

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git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14610 16af8721-9629-0410-8352-f15c8da7e697
This commit is contained in:
Robert Osfield 2014-12-17 19:21:32 +00:00
parent 69abe094ab
commit adf9596316
4 changed files with 238 additions and 19 deletions
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1
CMakeLists.txt
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@ -627,6 +627,7 @@ ELSE()
FIND_PACKAGE(GStreamer COMPONENTS gstreamer-app gstreamer-pbutils)
FIND_PACKAGE(GLIB COMPONENTS gobject)
FIND_PACKAGE(DirectShow)
FIND_PACKAGE(SDL2)
FIND_PACKAGE(SDL)
FIND_PACKAGE(Poppler-glib)
FIND_PACKAGE(RSVG)

178
CMakeModules/FindSDL2.cmake Normal file
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@ -0,0 +1,178 @@
# - Locate SDL library
# This module defines
# SDL2_LIBRARY, the name of the library to link against
# SDL2_FOUND, if false, do not try to link to SDL
# SDL2_INCLUDE_DIR, where to find SDL.h
# SDL2_VERSION_STRING, human-readable string containing the version of SDL
#
# This module responds to the the flag:
# SDL2_BUILDING_LIBRARY
# If this is defined, then no SDL2_main will be linked in because
# only applications need main().
# Otherwise, it is assumed you are building an application and this
# module will attempt to locate and set the the proper link flags
# as part of the returned SDL2_LIBRARY variable.
#
# Don't forget to include SDLmain.h and SDLmain.m your project for the
# OS X framework based version. (Other versions link to -lSDLmain which
# this module will try to find on your behalf.) Also for OS X, this
# module will automatically add the -framework Cocoa on your behalf.
#
#
# Additional Note: If you see an empty SDL2_LIBRARY_TEMP in your configuration
# and no SDL2_LIBRARY, it means CMake did not find your SDL library
# (SDL.dll, libsdl.so, SDL.framework, etc).
# Set SDL2_LIBRARY_TEMP to point to your SDL library, and configure again.
# Similarly, if you see an empty SDL2MAIN_LIBRARY, you should set this value
# as appropriate. These values are used to generate the final SDL2_LIBRARY
# variable, but when these values are unset, SDL2_LIBRARY does not get created.
#
#
# $SDLDIR is an environment variable that would
# correspond to the ./configure --prefix=$SDLDIR
# used in building SDL.
# l.e.galup 9-20-02
#
# Modified by Eric Wing.
# Added code to assist with automated building by using environmental variables
# and providing a more controlled/consistent search behavior.
# Added new modifications to recognize OS X frameworks and
# additional Unix paths (FreeBSD, etc).
# Also corrected the header search path to follow "proper" SDL guidelines.
# Added a search for SDLmain which is needed by some platforms.
# Added a search for threads which is needed by some platforms.
# Added needed compile switches for MinGW.
#
# On OSX, this will prefer the Framework version (if found) over others.
# People will have to manually change the cache values of
# SDL2_LIBRARY to override this selection or set the CMake environment
# CMAKE_INCLUDE_PATH to modify the search paths.
#
# Note that the header path has changed from SDL/SDL.h to just SDL.h
# This needed to change because "proper" SDL convention
# is #include "SDL.h", not <SDL/SDL.h>. This is done for portability
# reasons because not all systems place things in SDL/ (see FreeBSD).
#=============================================================================
# Copyright 2003-2009 Kitware, Inc.
# Copyright 2012 Benjamin Eikel
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
# License text for the above reference.)
find_path(SDL2_INCLUDE_DIR SDL.h
HINTS
ENV SDL2DIR
PATH_SUFFIXES include/SDL2
)
# SDL-1.1 is the name used by FreeBSD ports...
# don't confuse it for the version number.
find_library(SDL2_LIBRARY_TEMP
NAMES SDL2
HINTS
ENV SDL2DIR
PATH_SUFFIXES lib
)
if(NOT SDL2_BUILDING_LIBRARY)
if(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework")
# Non-OS X framework versions expect you to also dynamically link to
# SDLmain. This is mainly for Windows and OS X. Other (Unix) platforms
# seem to provide SDLmain for compatibility even though they don't
# necessarily need it.
find_library(SDL2MAIN_LIBRARY
NAMES SDL2main
HINTS
ENV SDL2DIR
PATH_SUFFIXES lib
PATHS
/sw
/opt/local
/opt/csw
/opt
)
endif()
endif()
# SDL may require threads on your system.
# The Apple build may not need an explicit flag because one of the
# frameworks may already provide it.
# But for non-OSX systems, I will use the CMake Threads package.
if(NOT APPLE)
find_package(Threads)
endif()
# MinGW needs an additional library, mwindows
# It's total link flags should look like -lmingw32 -lSDLmain -lSDL -lmwindows
# (Actually on second look, I think it only needs one of the m* libraries.)
if(MINGW)
set(MINGW32_LIBRARY mingw32 CACHE STRING "mwindows for MinGW")
endif()
if(SDL2_LIBRARY_TEMP)
# For SDLmain
if(SDL2MAIN_LIBRARY AND NOT SDL2_BUILDING_LIBRARY)
list(FIND SDL2_LIBRARY_TEMP "${SDL2MAIN_LIBRARY}" _SDL2_MAIN_INDEX)
if(_SDL2_MAIN_INDEX EQUAL -1)
set(SDL2_LIBRARY_TEMP "${SDL2MAIN_LIBRARY}" ${SDL2_LIBRARY_TEMP})
endif()
unset(_SDL2_MAIN_INDEX)
endif()
# For OS X, SDL uses Cocoa as a backend so it must link to Cocoa.
# CMake doesn't display the -framework Cocoa string in the UI even
# though it actually is there if I modify a pre-used variable.
# I think it has something to do with the CACHE STRING.
# So I use a temporary variable until the end so I can set the
# "real" variable in one-shot.
if(APPLE)
set(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} "-framework Cocoa")
endif()
# For threads, as mentioned Apple doesn't need this.
# In fact, there seems to be a problem if I used the Threads package
# and try using this line, so I'm just skipping it entirely for OS X.
if(NOT APPLE)
set(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} ${CMAKE_THREAD_LIBS_INIT})
endif()
# For MinGW library
if(MINGW)
set(SDL2_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL2_LIBRARY_TEMP})
endif()
# Set the final string here so the GUI reflects the final state.
set(SDL2_LIBRARY ${SDL2_LIBRARY_TEMP} CACHE STRING "Where the SDL Library can be found")
# Set the temp variable to INTERNAL so it is not seen in the CMake GUI
set(SDL2_LIBRARY_TEMP "${SDL2_LIBRARY_TEMP}" CACHE INTERNAL "")
endif()
if(SDL2_INCLUDE_DIR AND EXISTS "${SDL2_INCLUDE_DIR}/SDL2_version.h")
file(STRINGS "${SDL2_INCLUDE_DIR}/SDL2_version.h" SDL2_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL2_MAJOR_VERSION[ \t]+[0-9]+$")
file(STRINGS "${SDL2_INCLUDE_DIR}/SDL2_version.h" SDL2_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL2_MINOR_VERSION[ \t]+[0-9]+$")
file(STRINGS "${SDL2_INCLUDE_DIR}/SDL2_version.h" SDL2_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL2_PATCHLEVEL[ \t]+[0-9]+$")
string(REGEX REPLACE "^#define[ \t]+SDL2_MAJOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_VERSION_MAJOR "${SDL2_VERSION_MAJOR_LINE}")
string(REGEX REPLACE "^#define[ \t]+SDL2_MINOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_VERSION_MINOR "${SDL2_VERSION_MINOR_LINE}")
string(REGEX REPLACE "^#define[ \t]+SDL2_PATCHLEVEL[ \t]+([0-9]+)$" "\\1" SDL2_VERSION_PATCH "${SDL2_VERSION_PATCH_LINE}")
set(SDL2_VERSION_STRING ${SDL2_VERSION_MAJOR}.${SDL2_VERSION_MINOR}.${SDL2_VERSION_PATCH})
unset(SDL2_VERSION_MAJOR_LINE)
unset(SDL2_VERSION_MINOR_LINE)
unset(SDL2_VERSION_PATCH_LINE)
unset(SDL2_VERSION_MAJOR)
unset(SDL2_VERSION_MINOR)
unset(SDL2_VERSION_PATCH)
endif()
include(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2
REQUIRED_VARS SDL2_LIBRARY SDL2_INCLUDE_DIR
VERSION_VAR SDL2_VERSION_STRING)

13
examples/osgmovie/CMakeLists.txt
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@ -1,13 +1,24 @@
# INCLUDE_DIRECTORIES( ${OPENAL_INCLUDE_DIR} )
# SET(TARGET_EXTERNAL_LIBRARIES ${OPENAL_LIBRARY} alut)
IF (SDL_FOUND)
IF (SDL2_FOUND)
SET(TARGET_EXTERNAL_LIBRARIES ${SDL2_LIBRARY} )
INCLUDE_DIRECTORIES(${SDL2_INCLUDE_DIR} )
ADD_DEFINITIONS(-DUSE_SDL2)
IF (MINGW)
SET(TARGET_EXTERNAL_LIBRARIES ${TARGET_EXTERNAL_LIBRARIES} winmm dinput ddraw dxguid)
ENDIF()
ELSEIF (SDL_FOUND)
SET(TARGET_EXTERNAL_LIBRARIES ${SDL_LIBRARY} )
INCLUDE_DIRECTORIES(${SDL_INCLUDE_DIR} )
ADD_DEFINITIONS(-DUSE_SDL)
IF (MINGW)
SET(TARGET_EXTERNAL_LIBRARIES ${TARGET_EXTERNAL_LIBRARIES} winmm dinput ddraw dxguid)
ENDIF()
ENDIF(SDL_FOUND)
SET(TARGET_SRC osgmovie.cpp )

41
examples/osgmovie/osgmovie.cpp
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@ -376,7 +376,7 @@ osg::Geometry* myCreateTexturedQuadGeometry(const osg::Vec3& pos,float width,flo
}
}
#if USE_SDL
#if USE_SDL || USE_SDL2
class SDLAudioSink : public osg::AudioSink
{
@ -512,7 +512,7 @@ int main(int argc, char** argv)
bool useAudioSink = false;
while(arguments.read("--audio")) { useAudioSink = true; }
#if USE_SDL
#if USE_SDL || USE_SDL2
unsigned int numAudioStreamsEnabled = 0;
#endif
@ -529,7 +529,7 @@ int main(int argc, char** argv)
{
osg::AudioStream* audioStream = audioStreams[0].get();
osg::notify(osg::NOTICE)<<"AudioStream read ["<<audioStream->getName()<<"]"<<std::endl;
#if USE_SDL
#if USE_SDL || USE_SDL2
if (numAudioStreamsEnabled==0)
{
audioStream->setAudioSink(new SDLAudioSink(audioStream));
@ -659,7 +659,7 @@ int main(int argc, char** argv)
}
}
#if USE_SDL
#if USE_SDL || USE_SDL2
#include "SDL.h"
@ -699,22 +699,51 @@ void SDLAudioSink::play()
osg::notify(osg::NOTICE)<<" audioNbChannels()="<<_audioStream->audioNbChannels()<<std::endl;
osg::notify(osg::NOTICE)<<" audioSampleFormat()="<<_audioStream->audioSampleFormat()<<std::endl;
SDL_AudioSpec specs = { 0 };
SDL_AudioSpec wanted_specs = { 0 };
wanted_specs.freq = _audioStream->audioFrequency();
wanted_specs.format = AUDIO_S16SYS;
wanted_specs.channels = _audioStream->audioNbChannels();
wanted_specs.silence = 0;
wanted_specs.samples = 1024;
wanted_specs.callback = soundReadCallback;
wanted_specs.userdata = this;
wanted_specs.format = 0;
#if SDL_MAJOR_VERSION>=2
switch(_audioStream->audioSampleFormat())
{
case(osg::AudioStream::SAMPLE_FORMAT_U8): { wanted_specs.format = AUDIO_U8; OSG_NOTICE<<" SampleFormat = SAMPLE_FORMAT_U8"<<std::endl; break;}
case(osg::AudioStream::SAMPLE_FORMAT_S16): { wanted_specs.format = AUDIO_S16SYS; OSG_NOTICE<<" SampleFormat = SAMPLE_FORMAT_S16"<<std::endl; break; }
case(osg::AudioStream::SAMPLE_FORMAT_S24): { OSG_NOTICE<<" SampleFormat = SAMPLE_FORMAT_S24 NOT Supported by SDL."<<std::endl; break; }
case(osg::AudioStream::SAMPLE_FORMAT_S32): { wanted_specs.format = AUDIO_S32SYS; OSG_NOTICE<<" SampleFormat = SAMPLE_FORMAT_S32"<<std::endl; break; }
case(osg::AudioStream::SAMPLE_FORMAT_F32): { wanted_specs.format = AUDIO_F32SYS; OSG_NOTICE<<" SampleFormat = SAMPLE_FORMAT_F32"<<std::endl; break; }
}
#else
switch(_audioStream->audioSampleFormat())
{
case(osg::AudioStream::SAMPLE_FORMAT_U8): { wanted_specs.format = AUDIO_U8; OSG_NOTICE<<" SampleFormat = SAMPLE_FORMAT_U8"<<std::endl; break;}
case(osg::AudioStream::SAMPLE_FORMAT_S16): { wanted_specs.format = AUDIO_S16SYS; OSG_NOTICE<<" SampleFormat = SAMPLE_FORMAT_S16"<<std::endl; break; }
case(osg::AudioStream::SAMPLE_FORMAT_S24): { OSG_NOTICE<<" SampleFormat = SAMPLE_FORMAT_S24 NOT Supported by SDL1.x."<<std::endl; break; }
case(osg::AudioStream::SAMPLE_FORMAT_S32): { OSG_NOTICE<<" SampleFormat = SAMPLE_FORMAT_S32 NOT Supported by SDL1.x"<<std::endl; break; }
case(osg::AudioStream::SAMPLE_FORMAT_F32): { OSG_NOTICE<<" SampleFormat = SAMPLE_FORMAT_F32 NOT Supported by SDL1.x"<<std::endl; break; }
}
#endif
if (wanted_specs.format!=0)
{
if (SDL_OpenAudio(&wanted_specs, &specs) < 0)
throw "SDL_OpenAudio() failed (" + std::string(SDL_GetError()) + ")";
SDL_PauseAudio(0);
}
else
{
throw "SDL_OpenAudio() does not support audio format";
}
}
void SDLAudioSink::pause()