| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Gryphon's Anim Compressor decoder | ||
| 3 | * Copyright (c) 2019 Paul B Mahol | ||
| 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 | #include "libavutil/internal.h" | ||
| 23 | #include "libavutil/intreadwrite.h" | ||
| 24 | |||
| 25 | #include "avcodec.h" | ||
| 26 | #include "bytestream.h" | ||
| 27 | #include "codec_internal.h" | ||
| 28 | #include "decode.h" | ||
| 29 | |||
| 30 | typedef struct ARBCContext { | ||
| 31 | GetByteContext gb; | ||
| 32 | |||
| 33 | AVFrame *prev_frame; | ||
| 34 | } ARBCContext; | ||
| 35 | |||
| 36 | ✗ | static int fill_tile4(AVCodecContext *avctx, int color, AVFrame *frame) | |
| 37 | { | ||
| 38 | ✗ | ARBCContext *s = avctx->priv_data; | |
| 39 | ✗ | GetByteContext *gb = &s->gb; | |
| 40 | ✗ | int nb_tiles = bytestream2_get_le16(gb); | |
| 41 | ✗ | int h = avctx->height - 1; | |
| 42 | ✗ | int pixels_overwritten = 0; | |
| 43 | |||
| 44 | ✗ | if ((avctx->width / 4 + 1) * (avctx->height / 4 + 1) < nb_tiles) | |
| 45 | ✗ | return 0; | |
| 46 | |||
| 47 | ✗ | for (int i = 0; i < nb_tiles; i++) { | |
| 48 | ✗ | int y = bytestream2_get_byte(gb); | |
| 49 | ✗ | int x = bytestream2_get_byte(gb); | |
| 50 | ✗ | uint16_t mask = bytestream2_get_le16(gb); | |
| 51 | ✗ | int start_y = y * 4, start_x = x * 4; | |
| 52 | ✗ | int end_y = start_y + 4, end_x = start_x + 4; | |
| 53 | |||
| 54 | ✗ | for (int j = start_y; j < end_y; j++) { | |
| 55 | ✗ | for (int k = start_x; k < end_x; k++) { | |
| 56 | ✗ | if (mask & 0x8000) { | |
| 57 | ✗ | if (j >= avctx->height || k >= avctx->width) { | |
| 58 | ✗ | mask = mask << 1; | |
| 59 | ✗ | continue; | |
| 60 | } | ||
| 61 | ✗ | AV_WB24(&frame->data[0][frame->linesize[0] * (h - j) + 3 * k], color); | |
| 62 | ✗ | pixels_overwritten ++; | |
| 63 | } | ||
| 64 | ✗ | mask = mask << 1; | |
| 65 | } | ||
| 66 | } | ||
| 67 | } | ||
| 68 | ✗ | return pixels_overwritten; | |
| 69 | } | ||
| 70 | |||
| 71 | ✗ | static int fill_tileX(AVCodecContext *avctx, int tile_width, int tile_height, | |
| 72 | int color, AVFrame *frame) | ||
| 73 | { | ||
| 74 | ✗ | ARBCContext *s = avctx->priv_data; | |
| 75 | ✗ | GetByteContext *gb = &s->gb; | |
| 76 | ✗ | const int step_h = tile_height / 4; | |
| 77 | ✗ | const int step_w = tile_width / 4; | |
| 78 | ✗ | int nb_tiles = bytestream2_get_le16(gb); | |
| 79 | ✗ | int h = avctx->height - 1; | |
| 80 | ✗ | int pixels_overwritten = 0; | |
| 81 | |||
| 82 | ✗ | if ((avctx->width / tile_width + 1) * (avctx->height / tile_height + 1) < nb_tiles) | |
| 83 | ✗ | return 0; | |
| 84 | |||
| 85 | ✗ | for (int i = 0; i < nb_tiles; i++) { | |
| 86 | ✗ | int y = bytestream2_get_byte(gb); | |
| 87 | ✗ | int x = bytestream2_get_byte(gb); | |
| 88 | ✗ | uint16_t mask = bytestream2_get_le16(gb); | |
| 89 | ✗ | int start_y = y * tile_height, start_x = x * tile_width; | |
| 90 | ✗ | int end_y = start_y + tile_height, end_x = start_x + tile_width; | |
| 91 | |||
| 92 | ✗ | if (start_x >= avctx->width || start_y >= avctx->height) | |
| 93 | ✗ | continue; | |
| 94 | |||
| 95 | ✗ | for (int j = start_y; j < end_y; j += step_h) { | |
| 96 | ✗ | for (int k = start_x; k < end_x; k += step_w) { | |
| 97 | ✗ | if (mask & 0x8000U) { | |
| 98 | ✗ | for (int m = 0; m < step_h; m++) { | |
| 99 | ✗ | for (int n = 0; n < step_w; n++) { | |
| 100 | ✗ | if (j + m >= avctx->height || k + n >= avctx->width) | |
| 101 | ✗ | continue; | |
| 102 | ✗ | AV_WB24(&frame->data[0][frame->linesize[0] * (h - (j + m)) + 3 * (k + n)], color); | |
| 103 | } | ||
| 104 | } | ||
| 105 | ✗ | pixels_overwritten += FFMIN(step_h, avctx->height - j) * FFMIN(step_w, avctx->width - k); | |
| 106 | } | ||
| 107 | ✗ | mask = mask << 1; | |
| 108 | } | ||
| 109 | } | ||
| 110 | } | ||
| 111 | ✗ | return pixels_overwritten; | |
| 112 | } | ||
| 113 | |||
| 114 | ✗ | static int decode_frame(AVCodecContext *avctx, AVFrame *frame, | |
| 115 | int *got_frame, AVPacket *avpkt) | ||
| 116 | { | ||
| 117 | ✗ | ARBCContext *s = avctx->priv_data; | |
| 118 | int ret, nb_segments; | ||
| 119 | ✗ | int prev_pixels = avctx->width * avctx->height; | |
| 120 | |||
| 121 | ✗ | if (avpkt->size < 10) | |
| 122 | ✗ | return AVERROR_INVALIDDATA; | |
| 123 | |||
| 124 | ✗ | bytestream2_init(&s->gb, avpkt->data, avpkt->size); | |
| 125 | ✗ | bytestream2_skip(&s->gb, 8); | |
| 126 | ✗ | nb_segments = bytestream2_get_le16(&s->gb); | |
| 127 | ✗ | if (nb_segments == 0) | |
| 128 | ✗ | return avpkt->size; | |
| 129 | |||
| 130 | ✗ | if (7 * nb_segments > bytestream2_get_bytes_left(&s->gb)) | |
| 131 | ✗ | return AVERROR_INVALIDDATA; | |
| 132 | |||
| 133 | ✗ | if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0) | |
| 134 | ✗ | return ret; | |
| 135 | |||
| 136 | ✗ | if (s->prev_frame->data[0]) { | |
| 137 | ✗ | ret = av_frame_copy(frame, s->prev_frame); | |
| 138 | ✗ | if (ret < 0) | |
| 139 | ✗ | return ret; | |
| 140 | } | ||
| 141 | |||
| 142 | ✗ | for (int i = 0; i < nb_segments; i++) { | |
| 143 | int resolution_flag; | ||
| 144 | int fill; | ||
| 145 | |||
| 146 | ✗ | if (bytestream2_get_bytes_left(&s->gb) <= 0) | |
| 147 | ✗ | return AVERROR_INVALIDDATA; | |
| 148 | |||
| 149 | ✗ | fill = bytestream2_get_byte(&s->gb) << 16; | |
| 150 | ✗ | bytestream2_skip(&s->gb, 1); | |
| 151 | ✗ | fill |= bytestream2_get_byte(&s->gb) << 8; | |
| 152 | ✗ | bytestream2_skip(&s->gb, 1); | |
| 153 | ✗ | fill |= bytestream2_get_byte(&s->gb) << 0; | |
| 154 | ✗ | bytestream2_skip(&s->gb, 1); | |
| 155 | ✗ | resolution_flag = bytestream2_get_byte(&s->gb); | |
| 156 | |||
| 157 | ✗ | if (resolution_flag & 0x10) | |
| 158 | ✗ | prev_pixels -= fill_tileX(avctx, 1024, 1024, fill, frame); | |
| 159 | ✗ | if (resolution_flag & 0x08) | |
| 160 | ✗ | prev_pixels -= fill_tileX(avctx, 256, 256, fill, frame); | |
| 161 | ✗ | if (resolution_flag & 0x04) | |
| 162 | ✗ | prev_pixels -= fill_tileX(avctx, 64, 64, fill, frame); | |
| 163 | ✗ | if (resolution_flag & 0x02) | |
| 164 | ✗ | prev_pixels -= fill_tileX(avctx, 16, 16, fill, frame); | |
| 165 | ✗ | if (resolution_flag & 0x01) | |
| 166 | ✗ | prev_pixels -= fill_tile4(avctx, fill, frame); | |
| 167 | } | ||
| 168 | |||
| 169 | ✗ | if ((ret = av_frame_replace(s->prev_frame, frame)) < 0) | |
| 170 | ✗ | return ret; | |
| 171 | |||
| 172 | ✗ | frame->pict_type = prev_pixels <= 0 ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P; | |
| 173 | ✗ | if (prev_pixels <= 0) | |
| 174 | ✗ | frame->flags |= AV_FRAME_FLAG_KEY; | |
| 175 | else | ||
| 176 | ✗ | frame->flags &= ~AV_FRAME_FLAG_KEY; | |
| 177 | ✗ | *got_frame = 1; | |
| 178 | |||
| 179 | ✗ | return avpkt->size; | |
| 180 | } | ||
| 181 | |||
| 182 | ✗ | static av_cold int decode_init(AVCodecContext *avctx) | |
| 183 | { | ||
| 184 | ✗ | ARBCContext *s = avctx->priv_data; | |
| 185 | |||
| 186 | ✗ | avctx->pix_fmt = AV_PIX_FMT_RGB24; | |
| 187 | |||
| 188 | ✗ | s->prev_frame = av_frame_alloc(); | |
| 189 | ✗ | if (!s->prev_frame) | |
| 190 | ✗ | return AVERROR(ENOMEM); | |
| 191 | |||
| 192 | ✗ | return 0; | |
| 193 | } | ||
| 194 | |||
| 195 | ✗ | static void decode_flush(AVCodecContext *avctx) | |
| 196 | { | ||
| 197 | ✗ | ARBCContext *s = avctx->priv_data; | |
| 198 | |||
| 199 | ✗ | av_frame_unref(s->prev_frame); | |
| 200 | ✗ | } | |
| 201 | |||
| 202 | ✗ | static av_cold int decode_close(AVCodecContext *avctx) | |
| 203 | { | ||
| 204 | ✗ | ARBCContext *s = avctx->priv_data; | |
| 205 | |||
| 206 | ✗ | av_frame_free(&s->prev_frame); | |
| 207 | |||
| 208 | ✗ | return 0; | |
| 209 | } | ||
| 210 | |||
| 211 | const FFCodec ff_arbc_decoder = { | ||
| 212 | .p.name = "arbc", | ||
| 213 | CODEC_LONG_NAME("Gryphon's Anim Compressor"), | ||
| 214 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
| 215 | .p.id = AV_CODEC_ID_ARBC, | ||
| 216 | .priv_data_size = sizeof(ARBCContext), | ||
| 217 | .init = decode_init, | ||
| 218 | FF_CODEC_DECODE_CB(decode_frame), | ||
| 219 | .flush = decode_flush, | ||
| 220 | .close = decode_close, | ||
| 221 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
| 222 | .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, | ||
| 223 | }; | ||
| 224 |