| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * LCL (LossLess Codec Library) Codec | ||
| 3 | * Copyright (c) 2002-2004 Roberto Togni | ||
| 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 | /** | ||
| 23 | * @file | ||
| 24 | * LCL (LossLess Codec Library) Video Codec | ||
| 25 | * Decoder for MSZH and ZLIB codecs | ||
| 26 | * Experimental encoder for ZLIB RGB24 | ||
| 27 | * | ||
| 28 | * Fourcc: MSZH, ZLIB | ||
| 29 | * | ||
| 30 | * Original Win32 dll: | ||
| 31 | * Ver2.23 By Kenji Oshima 2000.09.20 | ||
| 32 | * avimszh.dll, avizlib.dll | ||
| 33 | * | ||
| 34 | * A description of the decoding algorithm can be found here: | ||
| 35 | * http://www.pcisys.net/~melanson/codecs | ||
| 36 | * | ||
| 37 | * Supports: BGR24 (RGB 24bpp) | ||
| 38 | */ | ||
| 39 | |||
| 40 | #include "config_components.h" | ||
| 41 | |||
| 42 | #include <stdio.h> | ||
| 43 | #include <stdlib.h> | ||
| 44 | |||
| 45 | #include "libavutil/attributes.h" | ||
| 46 | #include "libavutil/mem.h" | ||
| 47 | #include "libavutil/pixdesc.h" | ||
| 48 | #include "avcodec.h" | ||
| 49 | #include "bytestream.h" | ||
| 50 | #include "codec_internal.h" | ||
| 51 | #include "lcl.h" | ||
| 52 | #include "thread.h" | ||
| 53 | |||
| 54 | #if CONFIG_ZLIB_DECODER | ||
| 55 | #include "zlib_wrapper.h" | ||
| 56 | #include <zlib.h> | ||
| 57 | #endif | ||
| 58 | |||
| 59 | typedef struct LclDecContext { | ||
| 60 | // Image type | ||
| 61 | int imgtype; | ||
| 62 | // Compression type | ||
| 63 | int compression; | ||
| 64 | // Flags | ||
| 65 | int flags; | ||
| 66 | // Decompressed data size | ||
| 67 | unsigned int decomp_size; | ||
| 68 | // Decompression buffer | ||
| 69 | unsigned char* decomp_buf; | ||
| 70 | #if CONFIG_ZLIB_DECODER | ||
| 71 | FFZStream zstream; | ||
| 72 | #endif | ||
| 73 | } LclDecContext; | ||
| 74 | |||
| 75 | |||
| 76 | /** | ||
| 77 | * @param srcptr compressed source buffer, must be padded with at least 5 extra bytes | ||
| 78 | * @param destptr must be padded sufficiently for av_memcpy_backptr | ||
| 79 | */ | ||
| 80 | 1 | static unsigned int mszh_decomp(const unsigned char * srcptr, int srclen, unsigned char * destptr, unsigned int destsize) | |
| 81 | { | ||
| 82 | 1 | unsigned char *destptr_bak = destptr; | |
| 83 | 1 | unsigned char *destptr_end = destptr + destsize; | |
| 84 | 1 | const unsigned char *srcptr_end = srcptr + srclen; | |
| 85 | 1 | unsigned mask = *srcptr++; | |
| 86 | 1 | unsigned maskbit = 0x80; | |
| 87 | |||
| 88 |
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30274 | while (srcptr < srcptr_end && destptr < destptr_end) { |
| 89 |
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30272 | if (!(mask & maskbit)) { |
| 90 | 19751 | memcpy(destptr, srcptr, 4); | |
| 91 | 19751 | destptr += 4; | |
| 92 | 19751 | srcptr += 4; | |
| 93 | } else { | ||
| 94 | 10521 | unsigned ofs = bytestream_get_le16(&srcptr); | |
| 95 | 10521 | unsigned cnt = (ofs >> 11) + 1; | |
| 96 | 10521 | ofs &= 0x7ff; | |
| 97 | 10521 | ofs = FFMIN(ofs, destptr - destptr_bak); | |
| 98 | 10521 | cnt *= 4; | |
| 99 | 10521 | cnt = FFMIN(cnt, destptr_end - destptr); | |
| 100 |
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10521 | if (ofs) { |
| 101 | 10521 | av_memcpy_backptr(destptr, ofs, cnt); | |
| 102 | } else { | ||
| 103 | // Not known what the correct behaviour is, but | ||
| 104 | // this at least avoids uninitialized data. | ||
| 105 | ✗ | memset(destptr, 0, cnt); | |
| 106 | } | ||
| 107 | 10521 | destptr += cnt; | |
| 108 | } | ||
| 109 | 30272 | maskbit >>= 1; | |
| 110 |
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30272 | if (!maskbit) { |
| 111 | 3784 | mask = *srcptr++; | |
| 112 |
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6496 | while (!mask) { |
| 113 |
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2713 | if (destptr_end - destptr < 32 || srcptr_end - srcptr < 32) break; |
| 114 | 2712 | memcpy(destptr, srcptr, 32); | |
| 115 | 2712 | destptr += 32; | |
| 116 | 2712 | srcptr += 32; | |
| 117 | 2712 | mask = *srcptr++; | |
| 118 | } | ||
| 119 | 3784 | maskbit = 0x80; | |
| 120 | } | ||
| 121 | } | ||
| 122 | |||
| 123 |
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1 | if (destptr < destptr_end) |
| 124 | ✗ | memset(destptr, 0, destptr_end - destptr); | |
| 125 | |||
| 126 | 1 | return destptr - destptr_bak; | |
| 127 | } | ||
| 128 | |||
| 129 | |||
| 130 | #if CONFIG_ZLIB_DECODER | ||
| 131 | /** | ||
| 132 | * @brief decompress a zlib-compressed data block into decomp_buf | ||
| 133 | * @param src compressed input buffer | ||
| 134 | * @param src_len data length in input buffer | ||
| 135 | * @param offset offset in decomp_buf | ||
| 136 | * @param expected expected decompressed length | ||
| 137 | */ | ||
| 138 | 201 | static int zlib_decomp(AVCodecContext *avctx, const uint8_t *src, int src_len, int offset, int expected) | |
| 139 | { | ||
| 140 | 201 | LclDecContext *c = avctx->priv_data; | |
| 141 | 201 | z_stream *const zstream = &c->zstream.zstream; | |
| 142 | 201 | int zret = inflateReset(zstream); | |
| 143 |
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201 | if (zret != Z_OK) { |
| 144 | ✗ | av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret); | |
| 145 | ✗ | return AVERROR_UNKNOWN; | |
| 146 | } | ||
| 147 | 201 | zstream->next_in = src; | |
| 148 | 201 | zstream->avail_in = src_len; | |
| 149 | 201 | zstream->next_out = c->decomp_buf + offset; | |
| 150 | 201 | zstream->avail_out = c->decomp_size - offset; | |
| 151 | 201 | zret = inflate(zstream, Z_FINISH); | |
| 152 |
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201 | if (zret != Z_OK && zret != Z_STREAM_END) { |
| 153 | ✗ | av_log(avctx, AV_LOG_ERROR, "Inflate error: %d\n", zret); | |
| 154 | ✗ | return AVERROR_UNKNOWN; | |
| 155 | } | ||
| 156 |
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201 | if (expected != (unsigned int)zstream->total_out) { |
| 157 | 50 | av_log(avctx, AV_LOG_ERROR, "Decoded size differs (%d != %lu)\n", | |
| 158 | expected, zstream->total_out); | ||
| 159 |
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50 | if (expected > (unsigned int)zstream->total_out) { |
| 160 | 50 | memset(c->decomp_buf + offset + zstream->total_out, 0, | |
| 161 | 50 | c->decomp_size - offset - zstream->total_out); | |
| 162 | 50 | return (unsigned int)zstream->total_out; | |
| 163 | } | ||
| 164 | ✗ | return AVERROR_UNKNOWN; | |
| 165 | } | ||
| 166 | 151 | return zstream->total_out; | |
| 167 | } | ||
| 168 | #endif | ||
| 169 | |||
| 170 | |||
| 171 | 202 | static int decode_frame(AVCodecContext *avctx, AVFrame *frame, | |
| 172 | int *got_frame, AVPacket *avpkt) | ||
| 173 | { | ||
| 174 | 202 | const uint8_t *buf = avpkt->data; | |
| 175 | 202 | int buf_size = avpkt->size; | |
| 176 | 202 | LclDecContext * const c = avctx->priv_data; | |
| 177 | ptrdiff_t pixel_ptr; | ||
| 178 | int row, col; | ||
| 179 | 202 | unsigned char *encoded = avpkt->data, *outptr; | |
| 180 | uint8_t *y_out, *u_out, *v_out; | ||
| 181 | 202 | int width = avctx->width; // Real image width | |
| 182 | 202 | int height = avctx->height; // Real image height | |
| 183 | unsigned int mszh_dlen; | ||
| 184 | unsigned char yq, y1q, uq, vq; | ||
| 185 | int ret; | ||
| 186 | unsigned int mthread_inlen, mthread_outlen; | ||
| 187 | 202 | unsigned int len = buf_size; | |
| 188 | int linesize, offset; | ||
| 189 | |||
| 190 |
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202 | if ((ret = ff_thread_get_buffer(avctx, frame, 0)) < 0) |
| 191 | ✗ | return ret; | |
| 192 | |||
| 193 | 202 | outptr = frame->data[0]; // Output image pointer | |
| 194 | |||
| 195 | /* Decompress frame */ | ||
| 196 |
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202 | switch (avctx->codec_id) { |
| 197 | 1 | case AV_CODEC_ID_MSZH: | |
| 198 |
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1 | switch (c->compression) { |
| 199 | 1 | case COMP_MSZH: | |
| 200 |
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1 | if (c->imgtype == IMGTYPE_RGB24 && len == FFALIGN(width * 3, 4) * height || |
| 201 |
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1 | c->imgtype == IMGTYPE_YUV111 && len == width * height * 3) { |
| 202 | ; | ||
| 203 |
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1 | } else if (c->flags & FLAG_MULTITHREAD) { |
| 204 | ✗ | mthread_inlen = AV_RL32(buf); | |
| 205 | ✗ | if (len < 8 || len - 8 < mthread_inlen) { | |
| 206 | ✗ | av_log(avctx, AV_LOG_ERROR, "len %d is too small\n", len); | |
| 207 | ✗ | return AVERROR_INVALIDDATA; | |
| 208 | } | ||
| 209 | ✗ | mthread_outlen = AV_RL32(buf + 4); | |
| 210 | ✗ | mthread_outlen = FFMIN(mthread_outlen, c->decomp_size); | |
| 211 | ✗ | mszh_dlen = mszh_decomp(buf + 8, mthread_inlen, c->decomp_buf, c->decomp_size); | |
| 212 | ✗ | if (mthread_outlen != mszh_dlen) { | |
| 213 | ✗ | av_log(avctx, AV_LOG_ERROR, "Mthread1 decoded size differs (%d != %d)\n", | |
| 214 | mthread_outlen, mszh_dlen); | ||
| 215 | ✗ | return AVERROR_INVALIDDATA; | |
| 216 | } | ||
| 217 | ✗ | mszh_dlen = mszh_decomp(buf + 8 + mthread_inlen, len - 8 - mthread_inlen, | |
| 218 | ✗ | c->decomp_buf + mthread_outlen, c->decomp_size - mthread_outlen); | |
| 219 | ✗ | if (mthread_outlen != mszh_dlen) { | |
| 220 | ✗ | av_log(avctx, AV_LOG_ERROR, "Mthread2 decoded size differs (%d != %d)\n", | |
| 221 | mthread_outlen, mszh_dlen); | ||
| 222 | ✗ | return AVERROR_INVALIDDATA; | |
| 223 | } | ||
| 224 | ✗ | encoded = c->decomp_buf; | |
| 225 | ✗ | len = c->decomp_size; | |
| 226 | } else { | ||
| 227 | 1 | mszh_dlen = mszh_decomp(buf, len, c->decomp_buf, c->decomp_size); | |
| 228 |
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1 | if (c->decomp_size != mszh_dlen) { |
| 229 | ✗ | av_log(avctx, AV_LOG_ERROR, "Decoded size differs (%d != %d)\n", | |
| 230 | c->decomp_size, mszh_dlen); | ||
| 231 | ✗ | if (c->decomp_size != mszh_dlen && | |
| 232 | ✗ | c->decomp_size != mszh_dlen + 2) // YUV420 306x306 is missing 2 bytes | |
| 233 | ✗ | return AVERROR_INVALIDDATA; | |
| 234 | } | ||
| 235 | 1 | encoded = c->decomp_buf; | |
| 236 | 1 | len = mszh_dlen; | |
| 237 | } | ||
| 238 | 1 | break; | |
| 239 | ✗ | case COMP_MSZH_NOCOMP: { | |
| 240 | int bppx2; | ||
| 241 | ✗ | int aligned_width = width; | |
| 242 | ✗ | switch (c->imgtype) { | |
| 243 | ✗ | case IMGTYPE_YUV111: | |
| 244 | case IMGTYPE_RGB24: | ||
| 245 | ✗ | bppx2 = 6; | |
| 246 | ✗ | break; | |
| 247 | ✗ | case IMGTYPE_YUV422: | |
| 248 | ✗ | aligned_width &= ~3; | |
| 249 | av_fallthrough; | ||
| 250 | ✗ | case IMGTYPE_YUV211: | |
| 251 | ✗ | bppx2 = 4; | |
| 252 | ✗ | break; | |
| 253 | ✗ | case IMGTYPE_YUV411: | |
| 254 | ✗ | aligned_width &= ~3; | |
| 255 | av_fallthrough; | ||
| 256 | ✗ | case IMGTYPE_YUV420: | |
| 257 | ✗ | bppx2 = 3; | |
| 258 | ✗ | break; | |
| 259 | ✗ | default: | |
| 260 | ✗ | bppx2 = 0; // will error out below | |
| 261 | ✗ | break; | |
| 262 | } | ||
| 263 | ✗ | if (len < ((aligned_width * height * bppx2) >> 1)) | |
| 264 | ✗ | return AVERROR_INVALIDDATA; | |
| 265 | ✗ | break; | |
| 266 | } | ||
| 267 | ✗ | default: | |
| 268 | ✗ | av_log(avctx, AV_LOG_ERROR, "BUG! Unknown MSZH compression in frame decoder.\n"); | |
| 269 | ✗ | return AVERROR_INVALIDDATA; | |
| 270 | } | ||
| 271 | 1 | break; | |
| 272 | #if CONFIG_ZLIB_DECODER | ||
| 273 | 201 | case AV_CODEC_ID_ZLIB: | |
| 274 | /* Using the original dll with normal compression (-1) and RGB format | ||
| 275 | * gives a file with ZLIB fourcc, but frame is really uncompressed. | ||
| 276 | * To be sure that's true check also frame size */ | ||
| 277 |
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201 | if (c->compression == COMP_ZLIB_NORMAL && c->imgtype == IMGTYPE_RGB24 && |
| 278 |
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200 | len == width * height * 3) { |
| 279 | ✗ | if (c->flags & FLAG_PNGFILTER) { | |
| 280 | ✗ | memcpy(c->decomp_buf, buf, len); | |
| 281 | ✗ | encoded = c->decomp_buf; | |
| 282 | } else { | ||
| 283 | ✗ | break; | |
| 284 | } | ||
| 285 |
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201 | } else if (c->flags & FLAG_MULTITHREAD) { |
| 286 | ✗ | mthread_inlen = AV_RL32(buf); | |
| 287 | ✗ | mthread_inlen = FFMIN(mthread_inlen, len - 8); | |
| 288 | ✗ | mthread_outlen = AV_RL32(buf + 4); | |
| 289 | ✗ | mthread_outlen = FFMIN(mthread_outlen, c->decomp_size); | |
| 290 | ✗ | ret = zlib_decomp(avctx, buf + 8, mthread_inlen, 0, mthread_outlen); | |
| 291 | ✗ | if (ret < 0) return ret; | |
| 292 | ✗ | ret = zlib_decomp(avctx, buf + 8 + mthread_inlen, len - 8 - mthread_inlen, | |
| 293 | mthread_outlen, mthread_outlen); | ||
| 294 | ✗ | if (ret < 0) return ret; | |
| 295 | ✗ | memset(c->decomp_buf + mthread_outlen + ret, 0, | |
| 296 | ✗ | c->decomp_size - mthread_outlen - ret); | |
| 297 | ✗ | len = c->decomp_size; | |
| 298 | } else { | ||
| 299 | 201 | int ret = zlib_decomp(avctx, buf, len, 0, c->decomp_size); | |
| 300 |
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201 | if (ret < 0) return ret; |
| 301 | 201 | len = ret; | |
| 302 | } | ||
| 303 | 201 | encoded = c->decomp_buf; | |
| 304 | 201 | break; | |
| 305 | #endif | ||
| 306 | ✗ | default: | |
| 307 | ✗ | av_log(avctx, AV_LOG_ERROR, "BUG! Unknown codec in frame decoder compression switch.\n"); | |
| 308 | ✗ | return AVERROR_INVALIDDATA; | |
| 309 | } | ||
| 310 | |||
| 311 | |||
| 312 | /* Apply PNG filter */ | ||
| 313 |
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202 | if (avctx->codec_id == AV_CODEC_ID_ZLIB && (c->flags & FLAG_PNGFILTER)) { |
| 314 | ✗ | switch (c->imgtype) { | |
| 315 | ✗ | case IMGTYPE_YUV111: | |
| 316 | case IMGTYPE_RGB24: | ||
| 317 | ✗ | for (row = 0; row < height; row++) { | |
| 318 | ✗ | pixel_ptr = row * width * 3; | |
| 319 | ✗ | yq = encoded[pixel_ptr++]; | |
| 320 | ✗ | unsigned uqvq = AV_RL16(encoded+pixel_ptr); | |
| 321 | ✗ | pixel_ptr += 2; | |
| 322 | ✗ | for (col = 1; col < width; col++) { | |
| 323 | ✗ | encoded[pixel_ptr] = yq -= encoded[pixel_ptr]; | |
| 324 | ✗ | uqvq -= AV_RL16(encoded+pixel_ptr+1); | |
| 325 | ✗ | AV_WL16(encoded+pixel_ptr+1, uqvq); | |
| 326 | ✗ | pixel_ptr += 3; | |
| 327 | } | ||
| 328 | } | ||
| 329 | ✗ | break; | |
| 330 | ✗ | case IMGTYPE_YUV422: | |
| 331 | ✗ | pixel_ptr = 0; | |
| 332 | ✗ | for (row = 0; row < height; row++) { | |
| 333 | ✗ | yq = uq = vq =0; | |
| 334 | ✗ | for (col = 0; col < width/4; col++) { | |
| 335 | ✗ | encoded[pixel_ptr] = yq -= encoded[pixel_ptr]; | |
| 336 | ✗ | encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1]; | |
| 337 | ✗ | encoded[pixel_ptr+2] = yq -= encoded[pixel_ptr+2]; | |
| 338 | ✗ | encoded[pixel_ptr+3] = yq -= encoded[pixel_ptr+3]; | |
| 339 | ✗ | encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4]; | |
| 340 | ✗ | encoded[pixel_ptr+5] = uq -= encoded[pixel_ptr+5]; | |
| 341 | ✗ | encoded[pixel_ptr+6] = vq -= encoded[pixel_ptr+6]; | |
| 342 | ✗ | encoded[pixel_ptr+7] = vq -= encoded[pixel_ptr+7]; | |
| 343 | ✗ | pixel_ptr += 8; | |
| 344 | } | ||
| 345 | } | ||
| 346 | ✗ | break; | |
| 347 | ✗ | case IMGTYPE_YUV411: | |
| 348 | ✗ | pixel_ptr = 0; | |
| 349 | ✗ | for (row = 0; row < height; row++) { | |
| 350 | ✗ | yq = uq = vq =0; | |
| 351 | ✗ | for (col = 0; col < width/4; col++) { | |
| 352 | ✗ | encoded[pixel_ptr] = yq -= encoded[pixel_ptr]; | |
| 353 | ✗ | encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1]; | |
| 354 | ✗ | encoded[pixel_ptr+2] = yq -= encoded[pixel_ptr+2]; | |
| 355 | ✗ | encoded[pixel_ptr+3] = yq -= encoded[pixel_ptr+3]; | |
| 356 | ✗ | encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4]; | |
| 357 | ✗ | encoded[pixel_ptr+5] = vq -= encoded[pixel_ptr+5]; | |
| 358 | ✗ | pixel_ptr += 6; | |
| 359 | } | ||
| 360 | } | ||
| 361 | ✗ | break; | |
| 362 | ✗ | case IMGTYPE_YUV211: | |
| 363 | ✗ | for (row = 0; row < height; row++) { | |
| 364 | ✗ | pixel_ptr = row * width * 2; | |
| 365 | ✗ | yq = uq = vq =0; | |
| 366 | ✗ | for (col = 0; col < width/2; col++) { | |
| 367 | ✗ | encoded[pixel_ptr] = yq -= encoded[pixel_ptr]; | |
| 368 | ✗ | encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1]; | |
| 369 | ✗ | encoded[pixel_ptr+2] = uq -= encoded[pixel_ptr+2]; | |
| 370 | ✗ | encoded[pixel_ptr+3] = vq -= encoded[pixel_ptr+3]; | |
| 371 | ✗ | pixel_ptr += 4; | |
| 372 | } | ||
| 373 | } | ||
| 374 | ✗ | break; | |
| 375 | ✗ | case IMGTYPE_YUV420: | |
| 376 | ✗ | for (row = 0; row < height/2; row++) { | |
| 377 | ✗ | pixel_ptr = row * width * 3; | |
| 378 | ✗ | yq = y1q = uq = vq =0; | |
| 379 | ✗ | for (col = 0; col < width/2; col++) { | |
| 380 | ✗ | encoded[pixel_ptr] = yq -= encoded[pixel_ptr]; | |
| 381 | ✗ | encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1]; | |
| 382 | ✗ | encoded[pixel_ptr+2] = y1q -= encoded[pixel_ptr+2]; | |
| 383 | ✗ | encoded[pixel_ptr+3] = y1q -= encoded[pixel_ptr+3]; | |
| 384 | ✗ | encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4]; | |
| 385 | ✗ | encoded[pixel_ptr+5] = vq -= encoded[pixel_ptr+5]; | |
| 386 | ✗ | pixel_ptr += 6; | |
| 387 | } | ||
| 388 | } | ||
| 389 | ✗ | break; | |
| 390 | ✗ | default: | |
| 391 | ✗ | av_log(avctx, AV_LOG_ERROR, "BUG! Unknown imagetype in pngfilter switch.\n"); | |
| 392 | ✗ | return AVERROR_INVALIDDATA; | |
| 393 | } | ||
| 394 | } | ||
| 395 | |||
| 396 | /* Convert colorspace */ | ||
| 397 | 202 | y_out = frame->data[0] + (height - 1) * frame->linesize[0]; | |
| 398 | 202 | offset = (height - 1) * frame->linesize[1]; | |
| 399 |
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202 | u_out = FF_PTR_ADD(frame->data[1], offset); |
| 400 | 202 | offset = (height - 1) * frame->linesize[2]; | |
| 401 |
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202 | v_out = FF_PTR_ADD(frame->data[2], offset); |
| 402 |
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202 | switch (c->imgtype) { |
| 403 | ✗ | case IMGTYPE_YUV111: | |
| 404 | ✗ | for (row = 0; row < height; row++) { | |
| 405 | ✗ | for (col = 0; col < width; col++) { | |
| 406 | ✗ | y_out[col] = *encoded++; | |
| 407 | ✗ | u_out[col] = *encoded++ + 128; | |
| 408 | ✗ | v_out[col] = *encoded++ + 128; | |
| 409 | } | ||
| 410 | ✗ | y_out -= frame->linesize[0]; | |
| 411 | ✗ | u_out -= frame->linesize[1]; | |
| 412 | ✗ | v_out -= frame->linesize[2]; | |
| 413 | } | ||
| 414 | ✗ | break; | |
| 415 | ✗ | case IMGTYPE_YUV422: | |
| 416 | ✗ | for (row = 0; row < height; row++) { | |
| 417 | ✗ | for (col = 0; col < width - 3; col += 4) { | |
| 418 | ✗ | memcpy(y_out + col, encoded, 4); | |
| 419 | ✗ | encoded += 4; | |
| 420 | ✗ | u_out[ col >> 1 ] = *encoded++ + 128; | |
| 421 | ✗ | u_out[(col >> 1) + 1] = *encoded++ + 128; | |
| 422 | ✗ | v_out[ col >> 1 ] = *encoded++ + 128; | |
| 423 | ✗ | v_out[(col >> 1) + 1] = *encoded++ + 128; | |
| 424 | } | ||
| 425 | ✗ | if (col && col < width) { | |
| 426 | ✗ | u_out[ col >> 1 ] = u_out[(col>>1) - 1]; | |
| 427 | ✗ | v_out[ col >> 1 ] = v_out[(col>>1) - 1]; | |
| 428 | } | ||
| 429 | |||
| 430 | ✗ | y_out -= frame->linesize[0]; | |
| 431 | ✗ | u_out -= frame->linesize[1]; | |
| 432 | ✗ | v_out -= frame->linesize[2]; | |
| 433 | } | ||
| 434 | ✗ | break; | |
| 435 | 202 | case IMGTYPE_RGB24: | |
| 436 |
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202 | linesize = len < FFALIGN(3 * width, 4) * height ? 3 * width : FFALIGN(3 * width, 4); |
| 437 |
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45582 | for (row = height - 1; row >= 0; row--) { |
| 438 | 45380 | pixel_ptr = row * frame->linesize[0]; | |
| 439 | 45380 | memcpy(outptr + pixel_ptr, encoded, 3 * width); | |
| 440 | 45380 | encoded += linesize; | |
| 441 | } | ||
| 442 | 202 | break; | |
| 443 | ✗ | case IMGTYPE_YUV411: | |
| 444 | ✗ | for (row = 0; row < height; row++) { | |
| 445 | ✗ | for (col = 0; col < width - 3; col += 4) { | |
| 446 | ✗ | memcpy(y_out + col, encoded, 4); | |
| 447 | ✗ | encoded += 4; | |
| 448 | ✗ | u_out[col >> 2] = *encoded++ + 128; | |
| 449 | ✗ | v_out[col >> 2] = *encoded++ + 128; | |
| 450 | } | ||
| 451 | ✗ | if (col && col < width) { | |
| 452 | ✗ | u_out[col >> 2] = u_out[(col>>2) - 1]; | |
| 453 | ✗ | v_out[col >> 2] = v_out[(col>>2) - 1]; | |
| 454 | } | ||
| 455 | ✗ | y_out -= frame->linesize[0]; | |
| 456 | ✗ | u_out -= frame->linesize[1]; | |
| 457 | ✗ | v_out -= frame->linesize[2]; | |
| 458 | } | ||
| 459 | ✗ | break; | |
| 460 | ✗ | case IMGTYPE_YUV211: | |
| 461 | ✗ | for (row = 0; row < height; row++) { | |
| 462 | ✗ | for (col = 0; col < width - 1; col += 2) { | |
| 463 | ✗ | memcpy(y_out + col, encoded, 2); | |
| 464 | ✗ | encoded += 2; | |
| 465 | ✗ | u_out[col >> 1] = *encoded++ + 128; | |
| 466 | ✗ | v_out[col >> 1] = *encoded++ + 128; | |
| 467 | } | ||
| 468 | ✗ | y_out -= frame->linesize[0]; | |
| 469 | ✗ | u_out -= frame->linesize[1]; | |
| 470 | ✗ | v_out -= frame->linesize[2]; | |
| 471 | } | ||
| 472 | ✗ | break; | |
| 473 | ✗ | case IMGTYPE_YUV420: | |
| 474 | ✗ | u_out = frame->data[1] + ((height >> 1) - 1) * frame->linesize[1]; | |
| 475 | ✗ | v_out = frame->data[2] + ((height >> 1) - 1) * frame->linesize[2]; | |
| 476 | ✗ | for (row = 0; row < height - 1; row += 2) { | |
| 477 | ✗ | for (col = 0; col < width - 1; col += 2) { | |
| 478 | ✗ | memcpy(y_out + col, encoded, 2); | |
| 479 | ✗ | encoded += 2; | |
| 480 | ✗ | memcpy(y_out + col - frame->linesize[0], encoded, 2); | |
| 481 | ✗ | encoded += 2; | |
| 482 | ✗ | u_out[col >> 1] = *encoded++ + 128; | |
| 483 | ✗ | v_out[col >> 1] = *encoded++ + 128; | |
| 484 | } | ||
| 485 | ✗ | y_out -= frame->linesize[0] << 1; | |
| 486 | ✗ | u_out -= frame->linesize[1]; | |
| 487 | ✗ | v_out -= frame->linesize[2]; | |
| 488 | } | ||
| 489 | ✗ | break; | |
| 490 | ✗ | default: | |
| 491 | ✗ | av_log(avctx, AV_LOG_ERROR, "BUG! Unknown imagetype in image decoder.\n"); | |
| 492 | ✗ | return AVERROR_INVALIDDATA; | |
| 493 | } | ||
| 494 | |||
| 495 | 202 | *got_frame = 1; | |
| 496 | |||
| 497 | /* always report that the buffer was completely consumed */ | ||
| 498 | 202 | return buf_size; | |
| 499 | } | ||
| 500 | |||
| 501 | 12 | static av_cold int decode_init(AVCodecContext *avctx) | |
| 502 | { | ||
| 503 | 12 | LclDecContext * const c = avctx->priv_data; | |
| 504 | 12 | unsigned int basesize = avctx->width * avctx->height; | |
| 505 | 12 | unsigned int max_basesize = FFALIGN(avctx->width, 4) * | |
| 506 | 12 | FFALIGN(avctx->height, 4); | |
| 507 | unsigned int max_decomp_size; | ||
| 508 | int subsample_h, subsample_v; | ||
| 509 | 12 | int partial_h_supported = 0; | |
| 510 | |||
| 511 |
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12 | if (avctx->extradata_size < 8) { |
| 512 | ✗ | av_log(avctx, AV_LOG_ERROR, "Extradata size too small.\n"); | |
| 513 | ✗ | return AVERROR_INVALIDDATA; | |
| 514 | } | ||
| 515 | |||
| 516 | /* Check codec type */ | ||
| 517 |
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12 | if ((avctx->codec_id == AV_CODEC_ID_MSZH && avctx->extradata[7] != CODEC_MSZH) || |
| 518 |
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12 | (avctx->codec_id == AV_CODEC_ID_ZLIB && avctx->extradata[7] != CODEC_ZLIB)) { |
| 519 | ✗ | av_log(avctx, AV_LOG_ERROR, "Codec id and codec type mismatch. This should not happen.\n"); | |
| 520 | } | ||
| 521 | |||
| 522 | /* Detect image type */ | ||
| 523 |
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12 | switch (c->imgtype = avctx->extradata[4]) { |
| 524 | ✗ | case IMGTYPE_YUV111: | |
| 525 | ✗ | c->decomp_size = basesize * 3; | |
| 526 | ✗ | max_decomp_size = max_basesize * 3; | |
| 527 | ✗ | avctx->pix_fmt = AV_PIX_FMT_YUV444P; | |
| 528 | ✗ | av_log(avctx, AV_LOG_DEBUG, "Image type is YUV 1:1:1.\n"); | |
| 529 | ✗ | break; | |
| 530 | ✗ | case IMGTYPE_YUV422: | |
| 531 | ✗ | c->decomp_size = (avctx->width & ~3) * avctx->height * 2; | |
| 532 | ✗ | max_decomp_size = max_basesize * 2; | |
| 533 | ✗ | avctx->pix_fmt = AV_PIX_FMT_YUV422P; | |
| 534 | ✗ | av_log(avctx, AV_LOG_DEBUG, "Image type is YUV 4:2:2.\n"); | |
| 535 | ✗ | partial_h_supported = 1; | |
| 536 | ✗ | break; | |
| 537 | 12 | case IMGTYPE_RGB24: | |
| 538 | 12 | c->decomp_size = FFALIGN(avctx->width*3, 4) * avctx->height; | |
| 539 | 12 | max_decomp_size = max_basesize * 3; | |
| 540 | 12 | avctx->pix_fmt = AV_PIX_FMT_BGR24; | |
| 541 | 12 | av_log(avctx, AV_LOG_DEBUG, "Image type is RGB 24.\n"); | |
| 542 | 12 | break; | |
| 543 | ✗ | case IMGTYPE_YUV411: | |
| 544 | ✗ | c->decomp_size = (avctx->width & ~3) * avctx->height / 2 * 3; | |
| 545 | ✗ | max_decomp_size = max_basesize / 2 * 3; | |
| 546 | ✗ | avctx->pix_fmt = AV_PIX_FMT_YUV411P; | |
| 547 | ✗ | av_log(avctx, AV_LOG_DEBUG, "Image type is YUV 4:1:1.\n"); | |
| 548 | ✗ | partial_h_supported = 1; | |
| 549 | ✗ | break; | |
| 550 | ✗ | case IMGTYPE_YUV211: | |
| 551 | ✗ | c->decomp_size = basesize * 2; | |
| 552 | ✗ | max_decomp_size = max_basesize * 2; | |
| 553 | ✗ | avctx->pix_fmt = AV_PIX_FMT_YUV422P; | |
| 554 | ✗ | av_log(avctx, AV_LOG_DEBUG, "Image type is YUV 2:1:1.\n"); | |
| 555 | ✗ | break; | |
| 556 | ✗ | case IMGTYPE_YUV420: | |
| 557 | ✗ | c->decomp_size = basesize / 2 * 3; | |
| 558 | ✗ | max_decomp_size = max_basesize / 2 * 3; | |
| 559 | ✗ | avctx->pix_fmt = AV_PIX_FMT_YUV420P; | |
| 560 | ✗ | av_log(avctx, AV_LOG_DEBUG, "Image type is YUV 4:2:0.\n"); | |
| 561 | ✗ | break; | |
| 562 | ✗ | default: | |
| 563 | ✗ | av_log(avctx, AV_LOG_ERROR, "Unsupported image format %d.\n", c->imgtype); | |
| 564 | ✗ | return AVERROR_INVALIDDATA; | |
| 565 | } | ||
| 566 | |||
| 567 | 12 | av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &subsample_h, &subsample_v); | |
| 568 |
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12 | if ((avctx->width % (1<<subsample_h) && !partial_h_supported) || avctx->height % (1<<subsample_v)) { |
| 569 | ✗ | avpriv_request_sample(avctx, "Unsupported dimensions"); | |
| 570 | ✗ | return AVERROR_INVALIDDATA; | |
| 571 | } | ||
| 572 | |||
| 573 | /* Detect compression method */ | ||
| 574 | 12 | c->compression = (int8_t)avctx->extradata[5]; | |
| 575 |
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12 | switch (avctx->codec_id) { |
| 576 | 2 | case AV_CODEC_ID_MSZH: | |
| 577 |
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2 | switch (c->compression) { |
| 578 | 2 | case COMP_MSZH: | |
| 579 | 2 | av_log(avctx, AV_LOG_DEBUG, "Compression enabled.\n"); | |
| 580 | 2 | break; | |
| 581 | ✗ | case COMP_MSZH_NOCOMP: | |
| 582 | ✗ | c->decomp_size = 0; | |
| 583 | ✗ | av_log(avctx, AV_LOG_DEBUG, "No compression.\n"); | |
| 584 | ✗ | break; | |
| 585 | ✗ | default: | |
| 586 | ✗ | av_log(avctx, AV_LOG_ERROR, "Unsupported compression format for MSZH (%d).\n", c->compression); | |
| 587 | ✗ | return AVERROR_INVALIDDATA; | |
| 588 | } | ||
| 589 | 2 | break; | |
| 590 | #if CONFIG_ZLIB_DECODER | ||
| 591 | 10 | case AV_CODEC_ID_ZLIB: | |
| 592 |
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10 | switch (c->compression) { |
| 593 | ✗ | case COMP_ZLIB_HISPEED: | |
| 594 | ✗ | av_log(avctx, AV_LOG_DEBUG, "High speed compression.\n"); | |
| 595 | ✗ | break; | |
| 596 | 2 | case COMP_ZLIB_HICOMP: | |
| 597 | 2 | av_log(avctx, AV_LOG_DEBUG, "High compression.\n"); | |
| 598 | 2 | break; | |
| 599 | 8 | case COMP_ZLIB_NORMAL: | |
| 600 | 8 | av_log(avctx, AV_LOG_DEBUG, "Normal compression.\n"); | |
| 601 | 8 | break; | |
| 602 | ✗ | default: | |
| 603 | ✗ | if (c->compression < Z_NO_COMPRESSION || c->compression > Z_BEST_COMPRESSION) { | |
| 604 | ✗ | av_log(avctx, AV_LOG_ERROR, "Unsupported compression level for ZLIB: (%d).\n", c->compression); | |
| 605 | ✗ | return AVERROR_INVALIDDATA; | |
| 606 | } | ||
| 607 | ✗ | av_log(avctx, AV_LOG_DEBUG, "Compression level for ZLIB: (%d).\n", c->compression); | |
| 608 | } | ||
| 609 | 10 | break; | |
| 610 | #endif | ||
| 611 | ✗ | default: | |
| 612 | ✗ | av_log(avctx, AV_LOG_ERROR, "BUG! Unknown codec in compression switch.\n"); | |
| 613 | ✗ | return AVERROR_INVALIDDATA; | |
| 614 | } | ||
| 615 | |||
| 616 | /* Allocate decompression buffer */ | ||
| 617 |
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12 | if (c->decomp_size) { |
| 618 |
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12 | if (!(c->decomp_buf = av_malloc(max_decomp_size))) { |
| 619 | ✗ | av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n"); | |
| 620 | ✗ | return AVERROR(ENOMEM); | |
| 621 | } | ||
| 622 | } | ||
| 623 | |||
| 624 | /* Detect flags */ | ||
| 625 | 12 | c->flags = avctx->extradata[6]; | |
| 626 |
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12 | if (c->flags & FLAG_MULTITHREAD) |
| 627 | ✗ | av_log(avctx, AV_LOG_DEBUG, "Multithread encoder flag set.\n"); | |
| 628 |
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12 | if (c->flags & FLAG_NULLFRAME) |
| 629 | ✗ | av_log(avctx, AV_LOG_DEBUG, "Nullframe insertion flag set.\n"); | |
| 630 |
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12 | if (avctx->codec_id == AV_CODEC_ID_ZLIB && (c->flags & FLAG_PNGFILTER)) |
| 631 | ✗ | av_log(avctx, AV_LOG_DEBUG, "PNG filter flag set.\n"); | |
| 632 |
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12 | if (c->flags & FLAGMASK_UNUSED) |
| 633 | ✗ | av_log(avctx, AV_LOG_ERROR, "Unknown flag set (%d).\n", c->flags); | |
| 634 | |||
| 635 | /* If needed init zlib */ | ||
| 636 | #if CONFIG_ZLIB_DECODER | ||
| 637 |
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12 | if (avctx->codec_id == AV_CODEC_ID_ZLIB) |
| 638 | 10 | return ff_inflate_init(&c->zstream, avctx); | |
| 639 | #endif | ||
| 640 | |||
| 641 | 2 | return 0; | |
| 642 | } | ||
| 643 | |||
| 644 | 12 | static av_cold int decode_end(AVCodecContext *avctx) | |
| 645 | { | ||
| 646 | 12 | LclDecContext * const c = avctx->priv_data; | |
| 647 | |||
| 648 | 12 | av_freep(&c->decomp_buf); | |
| 649 | #if CONFIG_ZLIB_DECODER | ||
| 650 | 12 | ff_inflate_end(&c->zstream); | |
| 651 | #endif | ||
| 652 | |||
| 653 | 12 | return 0; | |
| 654 | } | ||
| 655 | |||
| 656 | #if CONFIG_MSZH_DECODER | ||
| 657 | const FFCodec ff_mszh_decoder = { | ||
| 658 | .p.name = "mszh", | ||
| 659 | CODEC_LONG_NAME("LCL (LossLess Codec Library) MSZH"), | ||
| 660 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
| 661 | .p.id = AV_CODEC_ID_MSZH, | ||
| 662 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS, | ||
| 663 | .priv_data_size = sizeof(LclDecContext), | ||
| 664 | .init = decode_init, | ||
| 665 | .close = decode_end, | ||
| 666 | FF_CODEC_DECODE_CB(decode_frame), | ||
| 667 | .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, | ||
| 668 | }; | ||
| 669 | #endif | ||
| 670 | |||
| 671 | #if CONFIG_ZLIB_DECODER | ||
| 672 | const FFCodec ff_zlib_decoder = { | ||
| 673 | .p.name = "zlib", | ||
| 674 | CODEC_LONG_NAME("LCL (LossLess Codec Library) ZLIB"), | ||
| 675 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
| 676 | .p.id = AV_CODEC_ID_ZLIB, | ||
| 677 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS, | ||
| 678 | .priv_data_size = sizeof(LclDecContext), | ||
| 679 | .init = decode_init, | ||
| 680 | .close = decode_end, | ||
| 681 | FF_CODEC_DECODE_CB(decode_frame), | ||
| 682 | .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, | ||
| 683 | }; | ||
| 684 | #endif | ||
| 685 |