gnu: Add openscenegraph.

* gnu/packages/graphics.scm (openscenegraph): New variable.
* gnu/packages/patches/openscenegraph-ffmpeg3.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.

1 files changed, 156 insertions, 0 deletions

diff --git a/gnu/packages/patches/openscenegraph-ffmpeg3.patch b/gnu/packages/patches/openscenegraph-ffmpeg3.patch
new file mode 100644
index 0000000000..02c04a5583
--- /dev/null
+++ b/gnu/packages/patches/openscenegraph-ffmpeg3.patch
@@ -0,0 +1,156 @@
+Description: Replace deprecated FFmpeg API
+Author: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
+See <http://forum.openscenegraph.org/viewtopic.php?t=15832>.
+--- a/src/osgPlugins/ffmpeg/FFmpegDecoderVideo.cpp
++++ b/src/osgPlugins/ffmpeg/FFmpegDecoderVideo.cpp
+@@ -71,7 +71,7 @@ void FFmpegDecoderVideo::open(AVStream *
+     findAspectRatio();
+ 
+     // Find out whether we support Alpha channel
+-    m_alpha_channel = (m_context->pix_fmt == PIX_FMT_YUVA420P);
++    m_alpha_channel = (m_context->pix_fmt == AV_PIX_FMT_YUVA420P);
+ 
+     // Find out the framerate
+     m_frame_rate = av_q2d(stream->avg_frame_rate);
+@@ -91,20 +91,19 @@ void FFmpegDecoderVideo::open(AVStream *
+         throw std::runtime_error("avcodec_open() failed");
+ 
+     // Allocate video frame
+-    m_frame.reset(avcodec_alloc_frame());
++    m_frame.reset(av_frame_alloc());
+ 
+     // Allocate converted RGB frame
+-    m_frame_rgba.reset(avcodec_alloc_frame());
+-    m_buffer_rgba[0].resize(avpicture_get_size(PIX_FMT_RGB24, width(), height()));
++    m_frame_rgba.reset(av_frame_alloc());
++    m_buffer_rgba[0].resize(avpicture_get_size(AV_PIX_FMT_RGB24, width(), height()));
+     m_buffer_rgba[1].resize(m_buffer_rgba[0].size());
+ 
+     // Assign appropriate parts of the buffer to image planes in m_frame_rgba
+-    avpicture_fill((AVPicture *) (m_frame_rgba).get(), &(m_buffer_rgba[0])[0], PIX_FMT_RGB24, width(), height());
++    avpicture_fill((AVPicture *) (m_frame_rgba).get(), &(m_buffer_rgba[0])[0], AV_PIX_FMT_RGB24, width(), height());
+ 
+     // Override get_buffer()/release_buffer() from codec context in order to retrieve the PTS of each frame.
+     m_context->opaque = this;
+-    m_context->get_buffer = getBuffer;
+-    m_context->release_buffer = releaseBuffer;
++    m_context->get_buffer2 = getBuffer;
+ }
+ 
+ 
+@@ -263,8 +262,8 @@ int FFmpegDecoderVideo::convert(AVPictur
+ #ifdef USE_SWSCALE
+     if (m_swscale_ctx==0)
+     {
+-        m_swscale_ctx = sws_getContext(src_width, src_height, (PixelFormat) src_pix_fmt,
+-                                      src_width, src_height, (PixelFormat) dst_pix_fmt,
++        m_swscale_ctx = sws_getContext(src_width, src_height, (AVPixelFormat) src_pix_fmt,
++                                      src_width, src_height, (AVPixelFormat) dst_pix_fmt,
+                                       /*SWS_BILINEAR*/ SWS_BICUBIC, NULL, NULL, NULL);
+     }
+ 
+@@ -311,14 +310,14 @@ void FFmpegDecoderVideo::publishFrame(co
+     AVPicture * const dst = (AVPicture *) m_frame_rgba.get();
+ 
+     // Assign appropriate parts of the buffer to image planes in m_frame_rgba
+-    avpicture_fill((AVPicture *) (m_frame_rgba).get(), &(m_buffer_rgba[m_writeBuffer])[0], PIX_FMT_RGB24, width(), height());
++    avpicture_fill((AVPicture *) (m_frame_rgba).get(), &(m_buffer_rgba[m_writeBuffer])[0], AV_PIX_FMT_RGB24, width(), height());
+ 
+     // Convert YUVA420p (i.e. YUV420p plus alpha channel) using our own routine
+ 
+-    if (m_context->pix_fmt == PIX_FMT_YUVA420P)
++    if (m_context->pix_fmt == AV_PIX_FMT_YUVA420P)
+         yuva420pToRgba(dst, src, width(), height());
+     else
+-        convert(dst, PIX_FMT_RGB24, src, m_context->pix_fmt, width(), height());
++        convert(dst, AV_PIX_FMT_RGB24, src, m_context->pix_fmt, width(), height());
+ 
+     // Wait 'delay' seconds before publishing the picture.
+     int i_delay = static_cast<int>(delay * 1000000 + 0.5);
+@@ -345,7 +344,7 @@ void FFmpegDecoderVideo::publishFrame(co
+ 
+ void FFmpegDecoderVideo::yuva420pToRgba(AVPicture * const dst, AVPicture * const src, int width, int height)
+ {
+-    convert(dst, PIX_FMT_RGB24, src, m_context->pix_fmt, width, height);
++    convert(dst, AV_PIX_FMT_RGB24, src, m_context->pix_fmt, width, height);
+ 
+     const size_t bpp = 4;
+ 
+@@ -363,31 +362,28 @@ void FFmpegDecoderVideo::yuva420pToRgba(
+     }
+ }
+ 
+-
+-
+-int FFmpegDecoderVideo::getBuffer(AVCodecContext * const context, AVFrame * const picture)
++int FFmpegDecoderVideo::getBuffer(AVCodecContext * const context, AVFrame * const picture, int flags)
+ {
++    AVBufferRef *ref;
+     const FFmpegDecoderVideo * const this_ = reinterpret_cast<const FFmpegDecoderVideo*>(context->opaque);
+ 
+-    const int result = avcodec_default_get_buffer(context, picture);
++    const int result = avcodec_default_get_buffer2(context, picture, flags);
+     int64_t * p_pts = reinterpret_cast<int64_t*>( av_malloc(sizeof(int64_t)) );
+ 
+     *p_pts = this_->m_packet_pts;
+     picture->opaque = p_pts;
+ 
++    ref = av_buffer_create((uint8_t *)picture->opaque, sizeof(int64_t), FFmpegDecoderVideo::freeBuffer, picture->buf[0], flags);
++    picture->buf[0] = ref;
++
+     return result;
+ }
+ 
+-
+-
+-void FFmpegDecoderVideo::releaseBuffer(AVCodecContext * const context, AVFrame * const picture)
++void FFmpegDecoderVideo::freeBuffer(void *opaque, uint8_t *data)
+ {
+-    if (picture != 0)
+-        av_freep(&picture->opaque);
+-
+-    avcodec_default_release_buffer(context, picture);
++    AVBufferRef *ref = (AVBufferRef *)opaque;
++    av_buffer_unref(&ref);
++    av_free(data);
+ }
+ 
+-
+-
+ } // namespace osgFFmpeg
+--- a/src/osgPlugins/ffmpeg/FFmpegDecoderVideo.hpp
++++ b/src/osgPlugins/ffmpeg/FFmpegDecoderVideo.hpp
+@@ -94,8 +94,8 @@ private:
+                 int src_pix_fmt, int src_width, int src_height);
+ 
+ 
+-    static int getBuffer(AVCodecContext * context, AVFrame * picture);
+-    static void releaseBuffer(AVCodecContext * context, AVFrame * picture);
++    static int getBuffer(AVCodecContext * context, AVFrame * picture, int flags);
++    static void freeBuffer(void * opaque, uint8_t *data);
+ 
+     PacketQueue &           m_packets;
+     FFmpegClocks &          m_clocks;
+--- a/src/osgPlugins/ffmpeg/FFmpegParameters.cpp
++++ b/src/osgPlugins/ffmpeg/FFmpegParameters.cpp
+@@ -19,7 +19,7 @@ extern "C"
+     #include <libavutil/pixdesc.h>
+ }
+ 
+-inline PixelFormat osg_av_get_pix_fmt(const char *name) { return av_get_pix_fmt(name); }
++inline AVPixelFormat osg_av_get_pix_fmt(const char *name) { return av_get_pix_fmt(name); }
+ 
+ 
+ namespace osgFFmpeg {
+--- a/src/osgPlugins/ffmpeg/FFmpegDecoderAudio.cpp	2016-02-18 21:25:39.627923629 +0000
++++ b/src/osgPlugins/ffmpeg/FFmpegDecoderAudio.cpp	2016-02-18 21:26:17.071140100 +0000
+@@ -227,8 +227,7 @@
+         if (avcodec_open2(m_context, p_codec, NULL) < 0)
+             throw std::runtime_error("avcodec_open() failed");
+ 
+-        m_context->get_buffer = avcodec_default_get_buffer;
+-        m_context->release_buffer = avcodec_default_release_buffer;
++        m_context->get_buffer2 = avcodec_default_get_buffer2;
+ 
+     }
+