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98412edfed
Add a shader-based Apple ProRes decoder. It supports all codec features for profiles up to the 4444 XQ profile, ie.: - 4:2:2 and 4:4:4 chroma subsampling - 10- and 12-bit component depth - Interlacing - Alpha The implementation consists in two shaders: the VLD kernel does entropy decoding for color/alpha, and the IDCT kernel performs the inverse transform on color components. Benchmarks for a 4k yuv422p10 sample: - AMD Radeon 6700XT: 178 fps - Intel i7 Tiger Lake: 37 fps - NVidia Orin Nano: 70 fps
39 lines
1.2 KiB
Plaintext
39 lines
1.2 KiB
Plaintext
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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void main(void)
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{
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uvec3 gid = gl_GlobalInvocationID;
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#ifndef INTERLACED
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ivec2 pos = ivec2(gid);
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#else
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ivec2 pos = ivec2(gid.x, (gid.y << 1) + bottom_field);
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#endif
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/* Clear luma plane */
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imageStore(dst[0], pos, uvec4(0));
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/* Clear chroma plane */
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if (gid.x < mb_width << (4 - log2_chroma_w)) {
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imageStore(dst[1], pos, uvec4(0));
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imageStore(dst[2], pos, uvec4(0));
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}
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/* Alpha plane doesn't need a clear because it is not sparsely encoded */
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}
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