| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * AVS3-P2/IEEE1857.10 video parser. | ||
| 3 | * Copyright (c) 2020 Zhenyu Wang <wangzhenyu@pkusz.edu.cn> | ||
| 4 | * Bingjie Han <hanbj@pkusz.edu.cn> | ||
| 5 | * Huiwen Ren <hwrenx@gmail.com> | ||
| 6 | * | ||
| 7 | * This file is part of FFmpeg. | ||
| 8 | * | ||
| 9 | * FFmpeg is free software; you can redistribute it and/or | ||
| 10 | * modify it under the terms of the GNU Lesser General Public | ||
| 11 | * License as published by the Free Software Foundation; either | ||
| 12 | * version 2.1 of the License, or (at your option) any later version. | ||
| 13 | * | ||
| 14 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 17 | * Lesser General Public License for more details. | ||
| 18 | * | ||
| 19 | * You should have received a copy of the GNU Lesser General Public | ||
| 20 | * License along with FFmpeg; if not, write to the Free Software | ||
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 22 | */ | ||
| 23 | |||
| 24 | #include "avs3.h" | ||
| 25 | #include "get_bits.h" | ||
| 26 | #include "parser.h" | ||
| 27 | |||
| 28 | ✗ | static int avs3_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size) | |
| 29 | { | ||
| 30 | ✗ | int pic_found = pc->frame_start_found; | |
| 31 | ✗ | uint32_t state = pc->state; | |
| 32 | ✗ | int cur = 0; | |
| 33 | |||
| 34 | ✗ | if (!pic_found) { | |
| 35 | ✗ | for (; cur < buf_size; ++cur) { | |
| 36 | ✗ | state = (state << 8) | buf[cur]; | |
| 37 | ✗ | if (AVS3_ISPIC(buf[cur])){ | |
| 38 | ✗ | cur++; | |
| 39 | ✗ | pic_found = 1; | |
| 40 | ✗ | break; | |
| 41 | } | ||
| 42 | } | ||
| 43 | } | ||
| 44 | |||
| 45 | ✗ | if (pic_found) { | |
| 46 | ✗ | if (!buf_size) | |
| 47 | ✗ | return END_NOT_FOUND; | |
| 48 | ✗ | for (; cur < buf_size; ++cur) { | |
| 49 | ✗ | state = (state << 8) | buf[cur]; | |
| 50 | ✗ | if ((state & 0xFFFFFF00) == 0x100 && AVS3_ISUNIT(state & 0xFF)) { | |
| 51 | ✗ | pc->frame_start_found = 0; | |
| 52 | ✗ | pc->state = -1; | |
| 53 | ✗ | return cur - 3; | |
| 54 | } | ||
| 55 | } | ||
| 56 | } | ||
| 57 | |||
| 58 | ✗ | pc->frame_start_found = pic_found; | |
| 59 | ✗ | pc->state = state; | |
| 60 | |||
| 61 | ✗ | return END_NOT_FOUND; | |
| 62 | } | ||
| 63 | |||
| 64 | ✗ | static void parse_avs3_nal_units(AVCodecParserContext *s, const uint8_t *buf, | |
| 65 | int buf_size, AVCodecContext *avctx) | ||
| 66 | { | ||
| 67 | ✗ | if (buf_size < 5) { | |
| 68 | ✗ | return; | |
| 69 | } | ||
| 70 | |||
| 71 | ✗ | if (buf[0] == 0x0 && buf[1] == 0x0 && buf[2] == 0x1) { | |
| 72 | ✗ | if (buf[3] == AVS3_SEQ_START_CODE) { | |
| 73 | GetBitContext gb; | ||
| 74 | int profile, ratecode, low_delay; | ||
| 75 | |||
| 76 | ✗ | av_unused int ret = init_get_bits(&gb, buf + 4, 100); | |
| 77 | av_assert1(ret >= 0); | ||
| 78 | |||
| 79 | ✗ | s->key_frame = 1; | |
| 80 | ✗ | s->pict_type = AV_PICTURE_TYPE_I; | |
| 81 | |||
| 82 | ✗ | profile = get_bits(&gb, 8); | |
| 83 | // Skip bits: level(8) | ||
| 84 | // progressive(1) | ||
| 85 | // field(1) | ||
| 86 | // library(2) | ||
| 87 | // resv(1) | ||
| 88 | // width(14) | ||
| 89 | // resv(1) | ||
| 90 | // height(14) | ||
| 91 | // chroma(2) | ||
| 92 | // sampe_precision(3) | ||
| 93 | ✗ | skip_bits(&gb, 47); | |
| 94 | |||
| 95 | ✗ | if (profile == AVS3_PROFILE_BASELINE_MAIN10) { | |
| 96 | ✗ | int sample_precision = get_bits(&gb, 3); | |
| 97 | ✗ | if (sample_precision == 1) { | |
| 98 | ✗ | avctx->pix_fmt = AV_PIX_FMT_YUV420P; | |
| 99 | ✗ | } else if (sample_precision == 2) { | |
| 100 | ✗ | avctx->pix_fmt = AV_PIX_FMT_YUV420P10LE; | |
| 101 | } else { | ||
| 102 | ✗ | avctx->pix_fmt = AV_PIX_FMT_NONE; | |
| 103 | } | ||
| 104 | } | ||
| 105 | |||
| 106 | // Skip bits: resv(1) | ||
| 107 | // aspect(4) | ||
| 108 | ✗ | skip_bits(&gb, 5); | |
| 109 | |||
| 110 | ✗ | ratecode = get_bits(&gb, 4); | |
| 111 | |||
| 112 | // Skip bits: resv(1) | ||
| 113 | // bitrate_low(18) | ||
| 114 | // resv(1) | ||
| 115 | // bitrate_high(12) | ||
| 116 | ✗ | skip_bits(&gb, 32); | |
| 117 | |||
| 118 | ✗ | low_delay = get_bits(&gb, 1); | |
| 119 | ✗ | avctx->has_b_frames = FFMAX(avctx->has_b_frames, !low_delay); | |
| 120 | |||
| 121 | ✗ | avctx->framerate.num = ff_avs3_frame_rate_tab[ratecode].num; | |
| 122 | ✗ | avctx->framerate.den = ff_avs3_frame_rate_tab[ratecode].den; | |
| 123 | |||
| 124 | ✗ | s->width = s->coded_width = avctx->width; | |
| 125 | ✗ | s->height = s->coded_height = avctx->height; | |
| 126 | |||
| 127 | ✗ | av_log(avctx, AV_LOG_DEBUG, | |
| 128 | "AVS3 parse seq HDR: profile %d; coded size: %dx%d; frame rate code: %d\n", | ||
| 129 | profile, avctx->width, avctx->height, ratecode); | ||
| 130 | |||
| 131 | ✗ | } else if (buf[3] == AVS3_INTRA_PIC_START_CODE) { | |
| 132 | ✗ | s->key_frame = 1; | |
| 133 | ✗ | s->pict_type = AV_PICTURE_TYPE_I; | |
| 134 | ✗ | } else if (buf[3] == AVS3_INTER_PIC_START_CODE){ | |
| 135 | ✗ | s->key_frame = 0; | |
| 136 | ✗ | if (buf_size > 9) { | |
| 137 | ✗ | int pic_code_type = buf[8] & 0x3; | |
| 138 | ✗ | if (pic_code_type == 1 || pic_code_type == 3) { | |
| 139 | ✗ | s->pict_type = AV_PICTURE_TYPE_P; | |
| 140 | } else { | ||
| 141 | ✗ | s->pict_type = AV_PICTURE_TYPE_B; | |
| 142 | } | ||
| 143 | } | ||
| 144 | } | ||
| 145 | } | ||
| 146 | } | ||
| 147 | |||
| 148 | |||
| 149 | ✗ | static int avs3_parse(AVCodecParserContext *s, AVCodecContext *avctx, | |
| 150 | const uint8_t **poutbuf, int *poutbuf_size, | ||
| 151 | const uint8_t *buf, int buf_size) | ||
| 152 | { | ||
| 153 | ✗ | ParseContext *pc = s->priv_data; | |
| 154 | int next; | ||
| 155 | |||
| 156 | ✗ | if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) { | |
| 157 | ✗ | next = buf_size; | |
| 158 | } else { | ||
| 159 | ✗ | next = avs3_find_frame_end(pc, buf, buf_size); | |
| 160 | ✗ | if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) { | |
| 161 | ✗ | *poutbuf = NULL; | |
| 162 | ✗ | *poutbuf_size = 0; | |
| 163 | ✗ | return buf_size; | |
| 164 | } | ||
| 165 | } | ||
| 166 | |||
| 167 | ✗ | parse_avs3_nal_units(s, buf, buf_size, avctx); | |
| 168 | |||
| 169 | ✗ | *poutbuf = buf; | |
| 170 | ✗ | *poutbuf_size = buf_size; | |
| 171 | |||
| 172 | ✗ | return next; | |
| 173 | } | ||
| 174 | |||
| 175 | const AVCodecParser ff_avs3_parser = { | ||
| 176 | .codec_ids = { AV_CODEC_ID_AVS3 }, | ||
| 177 | .priv_data_size = sizeof(ParseContext), | ||
| 178 | .parser_parse = avs3_parse, | ||
| 179 | .parser_close = ff_parse_close, | ||
| 180 | }; | ||
| 181 |