blob: 5b8946ea250bbf43e1e834392ab294c8141421dc
| 1 | /* |
| 2 | * This file is part of FFmpeg. |
| 3 | * |
| 4 | * FFmpeg is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU Lesser General Public |
| 6 | * License as published by the Free Software Foundation; either |
| 7 | * version 2.1 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * FFmpeg is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * Lesser General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Lesser General Public |
| 15 | * License along with FFmpeg; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 17 | */ |
| 18 | |
| 19 | #ifndef AVCODEC_INTRAX8_H |
| 20 | #define AVCODEC_INTRAX8_H |
| 21 | |
| 22 | #include "blockdsp.h" |
| 23 | #include "get_bits.h" |
| 24 | #include "idctdsp.h" |
| 25 | #include "intrax8dsp.h" |
| 26 | #include "wmv2dsp.h" |
| 27 | #include "mpegpicture.h" |
| 28 | |
| 29 | typedef struct IntraX8Context { |
| 30 | VLC *j_ac_vlc[4]; // they point to the static j_mb_vlc |
| 31 | VLC *j_orient_vlc; |
| 32 | VLC *j_dc_vlc[3]; |
| 33 | |
| 34 | int use_quant_matrix; |
| 35 | |
| 36 | // set by ff_intrax8_common_init |
| 37 | uint8_t *prediction_table; // 2 * (mb_w * 2) |
| 38 | ScanTable scantable[3]; |
| 39 | WMV2DSPContext wdsp; |
| 40 | uint8_t idct_permutation[64]; |
| 41 | AVCodecContext *avctx; |
| 42 | int *block_last_index; ///< last nonzero coefficient in block |
| 43 | int16_t (*block)[64]; |
| 44 | |
| 45 | // set by the caller codec |
| 46 | IntraX8DSPContext dsp; |
| 47 | IDCTDSPContext idsp; |
| 48 | BlockDSPContext bdsp; |
| 49 | int quant; |
| 50 | int dquant; |
| 51 | int qsum; |
| 52 | int loopfilter; |
| 53 | AVFrame *frame; |
| 54 | GetBitContext *gb; |
| 55 | |
| 56 | // calculated per frame |
| 57 | int quant_dc_chroma; |
| 58 | int divide_quant_dc_luma; |
| 59 | int divide_quant_dc_chroma; |
| 60 | uint8_t *dest[3]; |
| 61 | uint8_t scratchpad[42]; // size of the block is fixed (8x8 plus padding) |
| 62 | |
| 63 | // changed per block |
| 64 | int edges; |
| 65 | int flat_dc; |
| 66 | int predicted_dc; |
| 67 | int raw_orient; |
| 68 | int chroma_orient; |
| 69 | int orient; |
| 70 | int est_run; |
| 71 | |
| 72 | // block props |
| 73 | int mb_x, mb_y; |
| 74 | int mb_width, mb_height; |
| 75 | } IntraX8Context; |
| 76 | |
| 77 | /** |
| 78 | * Initialize IntraX8 frame decoder. |
| 79 | * @param avctx pointer to AVCodecContext |
| 80 | * @param w pointer to IntraX8Context |
| 81 | * @param idsp pointer to IDCTDSPContext |
| 82 | * @param block pointer to block array |
| 83 | * @param block_last_index pointer to index array |
| 84 | * @param mb_width macroblock width |
| 85 | * @param mb_height macroblock height |
| 86 | * @return 0 on success, a negative AVERROR value on error |
| 87 | */ |
| 88 | int ff_intrax8_common_init(AVCodecContext *avctx, |
| 89 | IntraX8Context *w, IDCTDSPContext *idsp, |
| 90 | int16_t (*block)[64], |
| 91 | int block_last_index[12], |
| 92 | int mb_width, int mb_height); |
| 93 | |
| 94 | /** |
| 95 | * Destroy IntraX8 frame structure. |
| 96 | * @param w pointer to IntraX8Context |
| 97 | */ |
| 98 | void ff_intrax8_common_end(IntraX8Context *w); |
| 99 | |
| 100 | /** |
| 101 | * Decode single IntraX8 frame. |
| 102 | * lowres decoding is theoretically impossible. |
| 103 | * @param w pointer to IntraX8Context |
| 104 | * @param pict the output Picture containing an AVFrame |
| 105 | * @param gb open bitstream reader |
| 106 | * @param mb_x pointer to the x coordinate of the current macroblock |
| 107 | * @param mb_y pointer to the y coordinate of the current macroblock |
| 108 | * @param dquant doubled quantizer, it would be odd in case of VC-1 halfpq==1. |
| 109 | * @param quant_offset offset away from zero |
| 110 | * @param loopfilter enable filter after decoding a block |
| 111 | */ |
| 112 | int ff_intrax8_decode_picture(IntraX8Context *w, Picture *pict, |
| 113 | GetBitContext *gb, int *mb_x, int *mb_y, |
| 114 | int quant, int halfpq, |
| 115 | int loopfilter, int lowdelay); |
| 116 | |
| 117 | #endif /* AVCODEC_INTRAX8_H */ |
| 118 |