mirror of https://git.ffmpeg.org/ffmpeg.git
97 lines
4.2 KiB
C
97 lines
4.2 KiB
C
/*
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* Texture block module
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* Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com>
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*
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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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/**
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* @file
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* Texture block (4x4) module
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*
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* References:
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* https://www.opengl.org/wiki/S3_Texture_Compression
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* https://www.opengl.org/wiki/Red_Green_Texture_Compression
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* https://msdn.microsoft.com/en-us/library/bb694531%28v=vs.85%29.aspx
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*
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* All functions return how much data has been written or read.
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*
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* Pixel input or output format is always AV_PIX_FMT_RGBA.
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*/
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#ifndef AVCODEC_TEXTUREDSP_H
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#define AVCODEC_TEXTUREDSP_H
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#include <stddef.h>
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#include <stdint.h>
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#define TEXTURE_BLOCK_W 4
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#define TEXTURE_BLOCK_H 4
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typedef struct TextureDSPContext {
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int (*dxt1_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*dxt1a_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*dxt2_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*dxt3_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*dxt4_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*dxt5_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*dxt5y_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*dxt5ys_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*rgtc1s_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*rgtc1u_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*rgtc1u_gray_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*rgtc1u_alpha_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*rgtc2s_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*rgtc2u_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*dxn3dc_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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} TextureDSPContext;
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typedef struct TextureDSPEncContext {
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int (*dxt1_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*dxt5_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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int (*dxt5ys_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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} TextureDSPEncContext;
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typedef struct TextureDSPThreadContext {
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union {
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const uint8_t *in; // Input frame data
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uint8_t *out; // Output frame data
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} frame_data;
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ptrdiff_t stride; // Frame linesize
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union {
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const uint8_t *in; // Compressed texture for decompression
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uint8_t *out; // Compressed texture of compression
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} tex_data;
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int tex_ratio; // Number of compressed bytes in a texture block
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int raw_ratio; // Number bytes in a line of a raw block
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int slice_count; // Number of slices for threaded operations
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/* Pointer to the selected compress or decompress function. */
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int (*tex_funct)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
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} TextureDSPThreadContext;
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void ff_texturedsp_init(TextureDSPContext *c);
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void ff_texturedspenc_init(TextureDSPEncContext *c);
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struct AVCodecContext;
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int ff_texturedsp_exec_decompress_threads(struct AVCodecContext *avctx,
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TextureDSPThreadContext *ctx);
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int ff_texturedsp_exec_compress_threads(struct AVCodecContext *avctx,
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TextureDSPThreadContext *ctx);
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#endif /* AVCODEC_TEXTUREDSP_H */
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