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97 lines
4.3 KiB
97 lines
4.3 KiB
/* |
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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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int width, height; // Frame width / height |
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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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