/* * FFv1 codec * * Copyright (c) 2024 Lynne <dev@lynne.ee> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ void main(void){    const uint slice_idx = gl_WorkGroupID.y*gl_NumWorkGroups.x + gl_WorkGroupID.x;     if (slice_ctx[slice_idx].slice_coding_mode == 0 && key_frame == 0)        return;     uint64_t slice_state_off = uint64_t(slice_state) +                               slice_idx*plane_state_size*codec_planes; #ifdef GOLOMB    uint64_t start = slice_state_off +                     (gl_WorkGroupID.z*context_count +                      gl_LocalInvocationID.x)*VLC_STATE_SIZE;    for (uint x = gl_LocalInvocationID.x; x < context_count; x += gl_WorkGroupSize.x) {        VlcState sb = VlcState(start);        sb.drift     =  int16_t(0);        sb.error_sum = uint16_t(4);        sb.bias      =   int8_t(0);        sb.count     =  uint8_t(1);        start += gl_WorkGroupSize.x*VLC_STATE_SIZE;    }#else    uint64_t start = slice_state_off +                     (gl_WorkGroupID.z*context_count)*CONTEXT_SIZE +                     (gl_LocalInvocationID.x << 2 /* dwords */); /* Bytes */    uint count_total = context_count*(CONTEXT_SIZE /* bytes */ >> 2 /* dwords */);    for (uint x = gl_LocalInvocationID.x; x < count_total; x += gl_WorkGroupSize.x) {        u32buf(start).v = 0x80808080;        start += gl_WorkGroupSize.x*(CONTEXT_SIZE >> 3 /* 1/8th of context */);    }#endif}