diff options
Diffstat (limited to 'lib/mesa/src/gallium/auxiliary/vl/vl_rbsp.h')
| -rw-r--r-- | lib/mesa/src/gallium/auxiliary/vl/vl_rbsp.h | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/lib/mesa/src/gallium/auxiliary/vl/vl_rbsp.h b/lib/mesa/src/gallium/auxiliary/vl/vl_rbsp.h deleted file mode 100644 index 7867238c4..000000000 --- a/lib/mesa/src/gallium/auxiliary/vl/vl_rbsp.h +++ /dev/null @@ -1,164 +0,0 @@ -/************************************************************************** - * - * Copyright 2013 Advanced Micro Devices, Inc. - * All Rights Reserved. - * - * 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, sub license, 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 (including the - * next paragraph) 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 NON-INFRINGEMENT. - * IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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. - * - **************************************************************************/ - -/* - * Authors: - * Christian König <christian.koenig@amd.com> - * - */ - -/* - * Functions for reading the raw byte sequence payload of H.264 - */ - -#ifndef vl_rbsp_h -#define vl_rbsp_h - -#include "vl/vl_vlc.h" - -struct vl_rbsp { - struct vl_vlc nal; - unsigned escaped; -}; - -/** - * Initialize the RBSP object - */ -static inline void vl_rbsp_init(struct vl_rbsp *rbsp, struct vl_vlc *nal, unsigned num_bits) -{ - unsigned bits_left = vl_vlc_bits_left(nal); - - /* copy the position */ - rbsp->nal = *nal; - - rbsp->escaped = 0; - - /* search for the end of the NAL unit */ - while (vl_vlc_search_byte(nal, num_bits, 0x00)) { - if (vl_vlc_peekbits(nal, 24) == 0x000001 || - vl_vlc_peekbits(nal, 32) == 0x00000001) { - vl_vlc_limit(&rbsp->nal, bits_left - vl_vlc_bits_left(nal)); - return; - } - vl_vlc_eatbits(nal, 8); - } -} - -/** - * Make at least 16 more bits available - */ -static inline void vl_rbsp_fillbits(struct vl_rbsp *rbsp) -{ - unsigned valid = vl_vlc_valid_bits(&rbsp->nal); - unsigned i, bits; - - /* abort if we still have enough bits */ - if (valid >= 32) - return; - - vl_vlc_fillbits(&rbsp->nal); - - /* abort if we have less than 24 bits left in this nal */ - if (vl_vlc_bits_left(&rbsp->nal) < 24) - return; - - /* check that we have enough bits left from the last fillbits */ - assert(valid >= rbsp->escaped); - - /* handle the already escaped bits */ - valid -= rbsp->escaped; - - /* search for the emulation prevention three byte */ - rbsp->escaped = 16; - bits = vl_vlc_valid_bits(&rbsp->nal); - for (i = valid + 24; i <= bits; i += 8) { - if ((vl_vlc_peekbits(&rbsp->nal, i) & 0xffffff) == 0x3) { - vl_vlc_removebits(&rbsp->nal, i - 8, 8); - rbsp->escaped = bits - i; - bits -= 8; - i += 8; - } - } -} - -/** - * Return an unsigned integer from the first n bits - */ -static inline unsigned vl_rbsp_u(struct vl_rbsp *rbsp, unsigned n) -{ - if (n == 0) - return 0; - - vl_rbsp_fillbits(rbsp); - return vl_vlc_get_uimsbf(&rbsp->nal, n); -} - -/** - * Return an unsigned exponential Golomb encoded integer - */ -static inline unsigned vl_rbsp_ue(struct vl_rbsp *rbsp) -{ - unsigned bits = 0; - - vl_rbsp_fillbits(rbsp); - while (!vl_vlc_get_uimsbf(&rbsp->nal, 1)) - ++bits; - - return (1 << bits) - 1 + vl_rbsp_u(rbsp, bits); -} - -/** - * Return an signed exponential Golomb encoded integer - */ -static inline signed vl_rbsp_se(struct vl_rbsp *rbsp) -{ - signed codeNum = vl_rbsp_ue(rbsp); - if (codeNum & 1) - return (codeNum + 1) >> 1; - else - return -(codeNum >> 1); -} - -/** - * Are more data available in the RBSP ? - */ -static inline bool vl_rbsp_more_data(struct vl_rbsp *rbsp) -{ - unsigned bits, value; - - if (vl_vlc_bits_left(&rbsp->nal) > 8) - return TRUE; - - bits = vl_vlc_valid_bits(&rbsp->nal); - value = vl_vlc_peekbits(&rbsp->nal, bits); - if (value == 0 || value == (1 << (bits - 1))) - return FALSE; - - return TRUE; -} - -#endif /* vl_rbsp_h */ |