| Line | Branch | Exec | Source |
|---|---|---|---|
| 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 | /** | ||
| 20 | * @file | ||
| 21 | * H.264 decoder/parser shared code | ||
| 22 | */ | ||
| 23 | |||
| 24 | #ifndef AVCODEC_H264_PARSE_H | ||
| 25 | #define AVCODEC_H264_PARSE_H | ||
| 26 | |||
| 27 | #include "config.h" | ||
| 28 | |||
| 29 | #include <stdint.h> | ||
| 30 | |||
| 31 | #include "libavutil/attributes.h" | ||
| 32 | |||
| 33 | #include "get_bits.h" | ||
| 34 | #include "h264_ps.h" | ||
| 35 | |||
| 36 | #define MB_TYPE_REF0 MB_TYPE_CODEC_SPECIFIC | ||
| 37 | #define MB_TYPE_8x8DCT 0x01000000 | ||
| 38 | |||
| 39 | // This table must be here because scan8[constant] must be known at compiletime | ||
| 40 | static const uint8_t scan8[16 * 3 + 3] = { | ||
| 41 | 4 + 1 * 8, 5 + 1 * 8, 4 + 2 * 8, 5 + 2 * 8, | ||
| 42 | 6 + 1 * 8, 7 + 1 * 8, 6 + 2 * 8, 7 + 2 * 8, | ||
| 43 | 4 + 3 * 8, 5 + 3 * 8, 4 + 4 * 8, 5 + 4 * 8, | ||
| 44 | 6 + 3 * 8, 7 + 3 * 8, 6 + 4 * 8, 7 + 4 * 8, | ||
| 45 | 4 + 6 * 8, 5 + 6 * 8, 4 + 7 * 8, 5 + 7 * 8, | ||
| 46 | 6 + 6 * 8, 7 + 6 * 8, 6 + 7 * 8, 7 + 7 * 8, | ||
| 47 | 4 + 8 * 8, 5 + 8 * 8, 4 + 9 * 8, 5 + 9 * 8, | ||
| 48 | 6 + 8 * 8, 7 + 8 * 8, 6 + 9 * 8, 7 + 9 * 8, | ||
| 49 | 4 + 11 * 8, 5 + 11 * 8, 4 + 12 * 8, 5 + 12 * 8, | ||
| 50 | 6 + 11 * 8, 7 + 11 * 8, 6 + 12 * 8, 7 + 12 * 8, | ||
| 51 | 4 + 13 * 8, 5 + 13 * 8, 4 + 14 * 8, 5 + 14 * 8, | ||
| 52 | 6 + 13 * 8, 7 + 13 * 8, 6 + 14 * 8, 7 + 14 * 8, | ||
| 53 | 0 + 0 * 8, 0 + 5 * 8, 0 + 10 * 8 | ||
| 54 | }; | ||
| 55 | |||
| 56 | /** | ||
| 57 | * Memory management control operation opcode. | ||
| 58 | */ | ||
| 59 | typedef enum MMCOOpcode { | ||
| 60 | MMCO_END = 0, | ||
| 61 | MMCO_SHORT2UNUSED, | ||
| 62 | MMCO_LONG2UNUSED, | ||
| 63 | MMCO_SHORT2LONG, | ||
| 64 | MMCO_SET_MAX_LONG, | ||
| 65 | MMCO_RESET, | ||
| 66 | MMCO_LONG, | ||
| 67 | } MMCOOpcode; | ||
| 68 | |||
| 69 | typedef struct H264PredWeightTable { | ||
| 70 | int use_weight; | ||
| 71 | int use_weight_chroma; | ||
| 72 | int luma_log2_weight_denom; | ||
| 73 | int chroma_log2_weight_denom; | ||
| 74 | int luma_weight_flag[2]; ///< 7.4.3.2 luma_weight_lX_flag | ||
| 75 | int chroma_weight_flag[2]; ///< 7.4.3.2 chroma_weight_lX_flag | ||
| 76 | // The following 2 can be changed to int8_t but that causes a 10 CPU cycles speed loss | ||
| 77 | int luma_weight[48][2][2]; | ||
| 78 | int chroma_weight[48][2][2][2]; | ||
| 79 | int implicit_weight[48][48][2]; | ||
| 80 | } H264PredWeightTable; | ||
| 81 | |||
| 82 | typedef struct H264POCContext { | ||
| 83 | int poc_lsb; | ||
| 84 | int poc_msb; | ||
| 85 | int delta_poc_bottom; | ||
| 86 | int delta_poc[2]; | ||
| 87 | int frame_num; | ||
| 88 | int prev_poc_msb; ///< poc_msb of the last reference pic for POC type 0 | ||
| 89 | int prev_poc_lsb; ///< poc_lsb of the last reference pic for POC type 0 | ||
| 90 | int frame_num_offset; ///< for POC type 2 | ||
| 91 | int prev_frame_num_offset; ///< for POC type 2 | ||
| 92 | int prev_frame_num; ///< frame_num of the last pic for POC type 1/2 | ||
| 93 | } H264POCContext; | ||
| 94 | |||
| 95 | int ff_h264_pred_weight_table(GetBitContext *gb, const SPS *sps, | ||
| 96 | const int *ref_count, int slice_type_nos, | ||
| 97 | H264PredWeightTable *pwt, | ||
| 98 | int picture_structure, void *logctx); | ||
| 99 | |||
| 100 | /** | ||
| 101 | * Check if the top & left blocks are available if needed & change the | ||
| 102 | * dc mode so it only uses the available blocks. | ||
| 103 | */ | ||
| 104 | int ff_h264_check_intra4x4_pred_mode(int8_t *pred_mode_cache, void *logctx, | ||
| 105 | int top_samples_available, int left_samples_available); | ||
| 106 | |||
| 107 | /** | ||
| 108 | * Check if the top & left blocks are available if needed & change the | ||
| 109 | * dc mode so it only uses the available blocks. | ||
| 110 | */ | ||
| 111 | int ff_h264_check_intra_pred_mode(void *logctx, int top_samples_available, | ||
| 112 | int left_samples_available, | ||
| 113 | int mode, int is_chroma); | ||
| 114 | |||
| 115 | int ff_h264_parse_ref_count(int *plist_count, int ref_count[2], | ||
| 116 | GetBitContext *gb, const PPS *pps, | ||
| 117 | int slice_type_nos, int picture_structure, void *logctx); | ||
| 118 | |||
| 119 | int ff_h264_init_poc(int pic_field_poc[2], int *pic_poc, | ||
| 120 | const SPS *sps, H264POCContext *poc, | ||
| 121 | int picture_structure, int nal_ref_idc); | ||
| 122 | |||
| 123 | int ff_h264_decode_extradata(const uint8_t *data, int size, H264ParamSets *ps, | ||
| 124 | int *is_avc, int *nal_length_size, | ||
| 125 | int err_recognition, void *logctx); | ||
| 126 | |||
| 127 | 36939030 | static av_always_inline uint32_t pack16to32(unsigned a, unsigned b) | |
| 128 | { | ||
| 129 | #if HAVE_BIGENDIAN | ||
| 130 | return (b & 0xFFFF) + (a << 16); | ||
| 131 | #else | ||
| 132 | 36939030 | return (a & 0xFFFF) + (b << 16); | |
| 133 | #endif | ||
| 134 | } | ||
| 135 | |||
| 136 | #endif /* AVCODEC_H264_PARSE_H */ | ||
| 137 |