| /* |
| * Texture block compression and decompression |
| * Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com> |
| * |
| * 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 |
| * |
| */ |
| |
| #include "avcodec.h" |
| |
| static int exec_func(AVCodecContext *avctx, void *arg, |
| int slice, int thread_nb) |
| { |
| const TextureDSPThreadContext *ctx = arg; |
| uint8_t *d = ctx->tex_data.out; |
| int w_block = ctx->width / TEXTURE_BLOCK_W; |
| int h_block = ctx->height / TEXTURE_BLOCK_H; |
| int x, y; |
| int start_slice, end_slice; |
| int base_blocks_per_slice = h_block / ctx->slice_count; |
| int remainder_blocks = h_block % ctx->slice_count; |
| |
| /* When the frame height (in blocks) doesn't divide evenly between the |
| * number of slices, spread the remaining blocks evenly between the first |
| * operations */ |
| start_slice = slice * base_blocks_per_slice; |
| /* Add any extra blocks (one per slice) that have been added before this slice */ |
| start_slice += FFMIN(slice, remainder_blocks); |
| |
| end_slice = start_slice + base_blocks_per_slice; |
| /* Add an extra block if there are still remainder blocks to be accounted for */ |
| if (slice < remainder_blocks) |
| end_slice++; |
| |
| for (y = start_slice; y < end_slice; y++) { |
| uint8_t *p = ctx->frame_data.out + y * ctx->stride * TEXTURE_BLOCK_H; |
| int off = y * w_block; |
| for (x = 0; x < w_block; x++) { |
| ctx->TEXTUREDSP_TEX_FUNC(p + x * ctx->raw_ratio, ctx->stride, |
| d + (off + x) * ctx->tex_ratio); |
| } |
| } |
| |
| return 0; |
| } |
| |
| int TEXTUREDSP_FUNC_NAME(AVCodecContext *avctx, TextureDSPThreadContext *ctx) |
| { |
| return avctx->execute2(avctx, exec_func, ctx, NULL, ctx->slice_count); |
| } |