1/* 2 * Common Ut Video header 3 * Copyright (c) 2011 Konstantin Shishkov 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22#ifndef AVCODEC_UTVIDEO_H 23#define AVCODEC_UTVIDEO_H 24 25/** 26 * @file 27 * Common Ut Video header 28 */ 29 30#include "libavutil/common.h" 31#include "avcodec.h" 32#include "bswapdsp.h" 33#include "huffyuvencdsp.h" 34 35enum { 36 PRED_NONE = 0, 37 PRED_LEFT, 38 PRED_GRADIENT, 39 PRED_MEDIAN, 40}; 41 42enum { 43 COMP_NONE = 0, 44 COMP_HUFF, 45}; 46 47/* 48 * "Original format" markers. 49 * Based on values gotten from the official VFW encoder. 50 * They are not used during decoding, but they do have 51 * an informative role on seeing what was input 52 * to the encoder. 53 */ 54enum { 55 UTVIDEO_RGB = MKTAG(0x00, 0x00, 0x01, 0x18), 56 UTVIDEO_RGBA = MKTAG(0x00, 0x00, 0x02, 0x18), 57 UTVIDEO_420 = MKTAG('Y', 'V', '1', '2'), 58 UTVIDEO_422 = MKTAG('Y', 'U', 'Y', '2'), 59}; 60 61/* Mapping of libavcodec prediction modes to Ut Video's */ 62extern const int ff_ut_pred_order[5]; 63 64/* Order of RGB(A) planes in Ut Video */ 65extern const int ff_ut_rgb_order[4]; 66 67typedef struct UtvideoContext { 68 AVCodecContext *avctx; 69 BswapDSPContext bdsp; 70 HuffYUVEncDSPContext hdsp; 71 72 uint32_t frame_info_size, flags, frame_info; 73 int planes; 74 int slices; 75 int compression; 76 int interlaced; 77 int frame_pred; 78 79 int slice_stride; 80 uint8_t *slice_bits, *slice_buffer[4]; 81 int slice_bits_size; 82} UtvideoContext; 83 84typedef struct HuffEntry { 85 uint8_t sym; 86 uint8_t len; 87 uint32_t code; 88} HuffEntry; 89 90/* Compare huffman tree nodes */ 91int ff_ut_huff_cmp_len(const void *a, const void *b); 92 93#endif /* AVCODEC_UTVIDEO_H */ 94