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/*
* 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
}
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