1 files changed, 142 insertions, 0 deletions
diff --git a/thirdparty/libsimplewebm/VPXDecoder.cpp b/thirdparty/libsimplewebm/VPXDecoder.cpp
new file mode 100644
index 0000000000..3f77b8f5cd
--- /dev/null
+++ b/thirdparty/libsimplewebm/VPXDecoder.cpp
@@ -0,0 +1,142 @@
+/*
+	MIT License
+
+	Copyright (c) 2016 Błażej Szczygieł
+
+	Permission is hereby granted, free of charge, to any person obtaining a copy
+	of this software and associated documentation files (the "Software"), to deal
+	in the Software without restriction, including without limitation the rights
+	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+	copies of the Software, and to permit persons to whom the Software is
+	furnished to do so, subject to the following conditions:
+
+	The above copyright notice and this permission notice shall be included in all
+	copies or substantial portions of the Software.
+
+	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+	SOFTWARE.
+*/
+
+#include "VPXDecoder.hpp"
+
+#include <vpx/vpx_decoder.h>
+#include <vpx/vp8dx.h>
+
+#include <stdlib.h>
+#include <string.h>
+
+VPXDecoder::VPXDecoder(const WebMDemuxer &demuxer, unsigned threads) :
+	m_ctx(NULL),
+	m_iter(NULL),
+	m_delay(0)
+{
+	if (threads > 8)
+		threads = 8;
+	else if (threads < 1)
+		threads = 1;
+
+	const vpx_codec_dec_cfg_t codecCfg = {
+		threads,
+		0,
+		0
+	};
+	vpx_codec_iface_t *codecIface = NULL;
+
+	switch (demuxer.getVideoCodec())
+	{
+		case WebMDemuxer::VIDEO_VP8:
+			codecIface = vpx_codec_vp8_dx();
+			break;
+		case WebMDemuxer::VIDEO_VP9:
+			codecIface = vpx_codec_vp9_dx();
+			m_delay = threads - 1;
+			break;
+		default:
+			return;
+	}
+
+	m_ctx = new vpx_codec_ctx_t;
+	if (vpx_codec_dec_init(m_ctx, codecIface, &codecCfg, m_delay > 0 ? VPX_CODEC_USE_FRAME_THREADING : 0))
+	{
+		delete m_ctx;
+		m_ctx = NULL;
+	}
+}
+VPXDecoder::~VPXDecoder()
+{
+	if (m_ctx)
+	{
+		vpx_codec_destroy(m_ctx);
+		delete m_ctx;
+	}
+}
+
+bool VPXDecoder::decode(const WebMFrame &frame)
+{
+	m_iter = NULL;
+	return !vpx_codec_decode(m_ctx, frame.buffer, frame.bufferSize, NULL, 0);
+}
+VPXDecoder::IMAGE_ERROR VPXDecoder::getImage(Image &image)
+{
+	IMAGE_ERROR err = NO_FRAME;
+	if (vpx_image_t *img = vpx_codec_get_frame(m_ctx, &m_iter))
+	{
+		if ((img->fmt & VPX_IMG_FMT_PLANAR) && !(img->fmt & (VPX_IMG_FMT_HAS_ALPHA | VPX_IMG_FMT_HIGHBITDEPTH)))
+		{
+			if (img->stride[0] && img->stride[1] && img->stride[2])
+			{
+				const int uPlane = !!(img->fmt & VPX_IMG_FMT_UV_FLIP) + 1;
+				const int vPlane =  !(img->fmt & VPX_IMG_FMT_UV_FLIP) + 1;
+
+				image.w = img->d_w;
+				image.h = img->d_h;
+				image.chromaShiftW = img->x_chroma_shift;
+				image.chromaShiftH = img->y_chroma_shift;
+
+				image.planes[0] = img->planes[0];
+				image.planes[1] = img->planes[uPlane];
+				image.planes[2] = img->planes[vPlane];
+
+				image.linesize[0] = img->stride[0];
+				image.linesize[1] = img->stride[uPlane];
+				image.linesize[2] = img->stride[vPlane];
+
+				err = NO_ERROR;
+			}
+		}
+		else
+		{
+			err = UNSUPPORTED_FRAME;
+		}
+	}
+	return err;
+}
+
+/**/
+
+#if 0
+
+static inline int ceilRshift(int val, int shift)
+{
+	return (val + (1 << shift) - 1) >> shift;
+}
+
+int VPXDecoder::Image::getWidth(int plane) const
+{
+	if (!plane)
+		return w;
+	return ceilRshift(w, chromaShiftW);
+}
+int VPXDecoder::Image::getHeight(int plane) const
+{
+	if (!plane)
+		return h;
+	return ceilRshift(h, chromaShiftH);
+}
+
+#endif