| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * MxPEG decoder | ||
| 3 | * Copyright (c) 2011 Anatoly Nenashev | ||
| 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 | /** | ||
| 24 | * @file | ||
| 25 | * MxPEG decoder | ||
| 26 | */ | ||
| 27 | |||
| 28 | #include "libavutil/mem.h" | ||
| 29 | #include "codec_internal.h" | ||
| 30 | #include "decode.h" | ||
| 31 | #include "hpeldsp.h" | ||
| 32 | #include "mjpeg.h" | ||
| 33 | #include "mjpegdec.h" | ||
| 34 | |||
| 35 | typedef struct MXpegDecodeContext { | ||
| 36 | MJpegDecodeContext jpg; | ||
| 37 | AVFrame *picture[2]; /* pictures array */ | ||
| 38 | int picture_index; /* index of current picture */ | ||
| 39 | int got_sof_data; /* true if SOF data successfully parsed */ | ||
| 40 | int got_mxm_bitmask; /* true if MXM bitmask available */ | ||
| 41 | uint8_t *mxm_bitmask; /* bitmask buffer */ | ||
| 42 | unsigned bitmask_size; /* size of bitmask */ | ||
| 43 | int has_complete_frame; /* true if has complete frame */ | ||
| 44 | uint8_t *completion_bitmask; /* completion bitmask of macroblocks */ | ||
| 45 | unsigned mb_width, mb_height; /* size of picture in MB's from MXM header */ | ||
| 46 | } MXpegDecodeContext; | ||
| 47 | |||
| 48 | 2 | static av_cold int mxpeg_decode_end(AVCodecContext *avctx) | |
| 49 | { | ||
| 50 | 2 | MXpegDecodeContext *s = avctx->priv_data; | |
| 51 | int i; | ||
| 52 | |||
| 53 | 2 | ff_mjpeg_decode_end(avctx); | |
| 54 | |||
| 55 |
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6 | for (i = 0; i < 2; ++i) |
| 56 | 4 | av_frame_free(&s->picture[i]); | |
| 57 | |||
| 58 | 2 | s->bitmask_size = 0; | |
| 59 | 2 | av_freep(&s->mxm_bitmask); | |
| 60 | 2 | av_freep(&s->completion_bitmask); | |
| 61 | |||
| 62 | 2 | return 0; | |
| 63 | } | ||
| 64 | |||
| 65 | 2 | static av_cold int mxpeg_decode_init(AVCodecContext *avctx) | |
| 66 | { | ||
| 67 | 2 | MXpegDecodeContext *s = avctx->priv_data; | |
| 68 | HpelDSPContext hdsp; | ||
| 69 | |||
| 70 | 2 | ff_hpeldsp_init(&hdsp, avctx->flags); | |
| 71 | 2 | s->jpg.copy_block = hdsp.put_pixels_tab[1][0]; | |
| 72 | |||
| 73 | 2 | s->picture[0] = av_frame_alloc(); | |
| 74 | 2 | s->picture[1] = av_frame_alloc(); | |
| 75 |
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2 | if (!s->picture[0] || !s->picture[1]) |
| 76 | ✗ | return AVERROR(ENOMEM); | |
| 77 | |||
| 78 | 2 | s->jpg.picture_ptr = s->picture[0]; | |
| 79 | 2 | return ff_mjpeg_decode_init(avctx); | |
| 80 | } | ||
| 81 | |||
| 82 | 31 | static int mxpeg_decode_app(MXpegDecodeContext *s, | |
| 83 | const uint8_t *buf_ptr, int buf_size) | ||
| 84 | { | ||
| 85 | int len; | ||
| 86 |
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31 | if (buf_size < 2) |
| 87 | ✗ | return 0; | |
| 88 | 31 | len = AV_RB16(buf_ptr); | |
| 89 | 31 | skip_bits(&s->jpg.gb, 8*FFMIN(len,buf_size)); | |
| 90 | |||
| 91 | 31 | return 0; | |
| 92 | } | ||
| 93 | |||
| 94 | 31 | static int mxpeg_decode_mxm(MXpegDecodeContext *s, | |
| 95 | const uint8_t *buf_ptr, int buf_size) | ||
| 96 | { | ||
| 97 | unsigned bitmask_size, mb_count; | ||
| 98 | int i; | ||
| 99 | |||
| 100 | 31 | s->mb_width = AV_RL16(buf_ptr+4); | |
| 101 | 31 | s->mb_height = AV_RL16(buf_ptr+6); | |
| 102 | 31 | mb_count = s->mb_width * s->mb_height; | |
| 103 | |||
| 104 | 31 | bitmask_size = (mb_count + 7) >> 3; | |
| 105 |
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31 | if (bitmask_size > buf_size - 12) { |
| 106 | ✗ | av_log(s->jpg.avctx, AV_LOG_ERROR, | |
| 107 | "MXM bitmask is not complete\n"); | ||
| 108 | ✗ | return AVERROR(EINVAL); | |
| 109 | } | ||
| 110 | |||
| 111 |
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31 | if (s->bitmask_size != bitmask_size) { |
| 112 | 2 | s->bitmask_size = 0; | |
| 113 | 2 | av_freep(&s->mxm_bitmask); | |
| 114 | 2 | s->mxm_bitmask = av_malloc(bitmask_size); | |
| 115 |
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2 | if (!s->mxm_bitmask) { |
| 116 | ✗ | av_log(s->jpg.avctx, AV_LOG_ERROR, | |
| 117 | "MXM bitmask memory allocation error\n"); | ||
| 118 | ✗ | return AVERROR(ENOMEM); | |
| 119 | } | ||
| 120 | |||
| 121 | 2 | av_freep(&s->completion_bitmask); | |
| 122 | 2 | s->completion_bitmask = av_mallocz(bitmask_size); | |
| 123 |
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2 | if (!s->completion_bitmask) { |
| 124 | ✗ | av_log(s->jpg.avctx, AV_LOG_ERROR, | |
| 125 | "Completion bitmask memory allocation error\n"); | ||
| 126 | ✗ | return AVERROR(ENOMEM); | |
| 127 | } | ||
| 128 | |||
| 129 | 2 | s->bitmask_size = bitmask_size; | |
| 130 | } | ||
| 131 | |||
| 132 | 31 | memcpy(s->mxm_bitmask, buf_ptr + 12, bitmask_size); | |
| 133 | 31 | s->got_mxm_bitmask = 1; | |
| 134 | |||
| 135 |
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31 | if (!s->has_complete_frame) { |
| 136 | 2 | uint8_t completion_check = 0xFF; | |
| 137 |
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1202 | for (i = 0; i < bitmask_size; ++i) { |
| 138 | 1200 | s->completion_bitmask[i] |= s->mxm_bitmask[i]; | |
| 139 | 1200 | completion_check &= s->completion_bitmask[i]; | |
| 140 | } | ||
| 141 | 2 | s->has_complete_frame = !(completion_check ^ 0xFF); | |
| 142 | } | ||
| 143 | |||
| 144 | 31 | return 0; | |
| 145 | } | ||
| 146 | |||
| 147 | 64 | static int mxpeg_decode_com(MXpegDecodeContext *s, | |
| 148 | const uint8_t *buf_ptr, int buf_size) | ||
| 149 | { | ||
| 150 | 64 | int len, ret = 0; | |
| 151 |
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64 | if (buf_size < 2) |
| 152 | ✗ | return 0; | |
| 153 | 64 | len = AV_RB16(buf_ptr); | |
| 154 |
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64 | if (len > 14 && len <= buf_size && !strncmp(buf_ptr + 2, "MXM", 3)) { |
| 155 | 31 | ret = mxpeg_decode_mxm(s, buf_ptr + 2, len - 2); | |
| 156 | } | ||
| 157 | 64 | skip_bits(&s->jpg.gb, 8*FFMIN(len,buf_size)); | |
| 158 | |||
| 159 | 64 | return ret; | |
| 160 | } | ||
| 161 | |||
| 162 | 31 | static int mxpeg_check_dimensions(MXpegDecodeContext *s, MJpegDecodeContext *jpg, | |
| 163 | AVFrame *reference_ptr) | ||
| 164 | { | ||
| 165 |
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31 | if ((jpg->width + 0x0F)>>4 != s->mb_width || |
| 166 |
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31 | (jpg->height + 0x0F)>>4 != s->mb_height) { |
| 167 | ✗ | av_log(jpg->avctx, AV_LOG_ERROR, | |
| 168 | "Picture dimensions stored in SOF and MXM mismatch\n"); | ||
| 169 | ✗ | return AVERROR(EINVAL); | |
| 170 | } | ||
| 171 | |||
| 172 |
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31 | if (reference_ptr->data[0]) { |
| 173 | int i; | ||
| 174 |
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145 | for (i = 0; i < MAX_COMPONENTS; ++i) { |
| 175 |
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116 | if ( (!reference_ptr->data[i] ^ !jpg->picture_ptr->data[i]) || |
| 176 |
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116 | reference_ptr->linesize[i] != jpg->picture_ptr->linesize[i]) { |
| 177 | ✗ | av_log(jpg->avctx, AV_LOG_ERROR, | |
| 178 | "Dimensions of current and reference picture mismatch\n"); | ||
| 179 | ✗ | return AVERROR(EINVAL); | |
| 180 | } | ||
| 181 | } | ||
| 182 |
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29 | if (reference_ptr->width != jpg->picture_ptr->width || |
| 183 |
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29 | reference_ptr->height != jpg->picture_ptr->height || |
| 184 |
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29 | reference_ptr->format != jpg->picture_ptr->format) { |
| 185 | ✗ | av_log(jpg->avctx, AV_LOG_ERROR, "Reference mismatching\n"); | |
| 186 | ✗ | return AVERROR_INVALIDDATA; | |
| 187 | } | ||
| 188 | } | ||
| 189 | |||
| 190 | 31 | return 0; | |
| 191 | } | ||
| 192 | |||
| 193 | 31 | static int mxpeg_decode_frame(AVCodecContext *avctx, AVFrame *rframe, | |
| 194 | int *got_frame, AVPacket *avpkt) | ||
| 195 | { | ||
| 196 | 31 | const uint8_t *buf = avpkt->data; | |
| 197 | 31 | int buf_size = avpkt->size; | |
| 198 | 31 | MXpegDecodeContext *s = avctx->priv_data; | |
| 199 | 31 | MJpegDecodeContext *jpg = &s->jpg; | |
| 200 | const uint8_t *buf_end, *buf_ptr; | ||
| 201 | const uint8_t *unescaped_buf_ptr; | ||
| 202 | int unescaped_buf_size; | ||
| 203 | int start_code; | ||
| 204 | int ret; | ||
| 205 | |||
| 206 |
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31 | if (avctx->skip_frame == AVDISCARD_ALL) |
| 207 | ✗ | return AVERROR_PATCHWELCOME; | |
| 208 | |||
| 209 | 31 | buf_ptr = buf; | |
| 210 | 31 | buf_end = buf + buf_size; | |
| 211 | 31 | jpg->got_picture = 0; | |
| 212 | 31 | s->got_mxm_bitmask = 0; | |
| 213 | 31 | s->got_sof_data = !!s->got_sof_data; | |
| 214 |
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202 | while (buf_ptr < buf_end) { |
| 215 | 202 | start_code = ff_mjpeg_find_marker(jpg, &buf_ptr, buf_end, | |
| 216 | &unescaped_buf_ptr, &unescaped_buf_size); | ||
| 217 |
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202 | if (start_code < 0) |
| 218 | ✗ | goto the_end; | |
| 219 | { | ||
| 220 | 202 | init_get_bits(&jpg->gb, unescaped_buf_ptr, unescaped_buf_size*8); | |
| 221 | |||
| 222 |
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202 | if (start_code >= APP0 && start_code <= APP15) { |
| 223 | 31 | mxpeg_decode_app(s, unescaped_buf_ptr, unescaped_buf_size); | |
| 224 | } | ||
| 225 | |||
| 226 |
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202 | switch (start_code) { |
| 227 | 31 | case SOI: | |
| 228 |
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31 | if (jpg->got_picture) //emulating EOI |
| 229 | ✗ | goto the_end; | |
| 230 | 31 | break; | |
| 231 | 31 | case EOI: | |
| 232 | 31 | goto the_end; | |
| 233 | 4 | case DQT: | |
| 234 | 4 | ret = ff_mjpeg_decode_dqt(jpg); | |
| 235 |
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4 | if (ret < 0) { |
| 236 | ✗ | av_log(avctx, AV_LOG_ERROR, | |
| 237 | "quantization table decode error\n"); | ||
| 238 | ✗ | return ret; | |
| 239 | } | ||
| 240 | 4 | break; | |
| 241 | 8 | case DHT: | |
| 242 | 8 | ret = ff_mjpeg_decode_dht(jpg); | |
| 243 |
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8 | if (ret < 0) { |
| 244 | ✗ | av_log(avctx, AV_LOG_ERROR, | |
| 245 | "huffman table decode error\n"); | ||
| 246 | ✗ | return ret; | |
| 247 | } | ||
| 248 | 8 | break; | |
| 249 | 64 | case COM: | |
| 250 | 64 | ret = mxpeg_decode_com(s, unescaped_buf_ptr, | |
| 251 | unescaped_buf_size); | ||
| 252 |
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64 | if (ret < 0) |
| 253 | ✗ | return ret; | |
| 254 | 64 | break; | |
| 255 | 2 | case SOF0: | |
| 256 |
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2 | if (s->got_sof_data > 1) { |
| 257 | ✗ | av_log(avctx, AV_LOG_ERROR, | |
| 258 | "Multiple SOF in a frame\n"); | ||
| 259 | ✗ | return AVERROR_INVALIDDATA; | |
| 260 | } | ||
| 261 | 2 | ret = ff_mjpeg_decode_sof(jpg); | |
| 262 |
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2 | if (ret < 0) { |
| 263 | ✗ | av_log(avctx, AV_LOG_ERROR, | |
| 264 | "SOF data decode error\n"); | ||
| 265 | ✗ | s->got_sof_data = 0; | |
| 266 | ✗ | return ret; | |
| 267 | } | ||
| 268 |
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2 | if (jpg->interlaced) { |
| 269 | ✗ | av_log(avctx, AV_LOG_ERROR, | |
| 270 | "Interlaced mode not supported in MxPEG\n"); | ||
| 271 | ✗ | s->got_sof_data = 0; | |
| 272 | ✗ | return AVERROR(EINVAL); | |
| 273 | } | ||
| 274 | 2 | s->got_sof_data ++; | |
| 275 | 2 | break; | |
| 276 | 31 | case SOS: | |
| 277 |
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31 | if (!s->got_sof_data) { |
| 278 | ✗ | av_log(avctx, AV_LOG_WARNING, | |
| 279 | "Can not process SOS without SOF data, skipping\n"); | ||
| 280 | ✗ | break; | |
| 281 | } | ||
| 282 |
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31 | if (!jpg->got_picture) { |
| 283 |
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29 | if (jpg->first_picture) { |
| 284 | ✗ | av_log(avctx, AV_LOG_WARNING, | |
| 285 | "First picture has no SOF, skipping\n"); | ||
| 286 | ✗ | break; | |
| 287 | } | ||
| 288 |
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29 | if (!s->got_mxm_bitmask){ |
| 289 | ✗ | av_log(avctx, AV_LOG_WARNING, | |
| 290 | "Non-key frame has no MXM, skipping\n"); | ||
| 291 | ✗ | break; | |
| 292 | } | ||
| 293 | /* use stored SOF data to allocate current picture */ | ||
| 294 | 29 | av_frame_unref(jpg->picture_ptr); | |
| 295 |
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29 | if ((ret = ff_get_buffer(avctx, jpg->picture_ptr, |
| 296 | AV_GET_BUFFER_FLAG_REF)) < 0) | ||
| 297 | ✗ | return ret; | |
| 298 | 29 | jpg->picture_ptr->pict_type = AV_PICTURE_TYPE_P; | |
| 299 | 29 | jpg->picture_ptr->flags &= ~AV_FRAME_FLAG_KEY; | |
| 300 | 29 | jpg->got_picture = 1; | |
| 301 | } else { | ||
| 302 | 2 | jpg->picture_ptr->pict_type = AV_PICTURE_TYPE_I; | |
| 303 | 2 | jpg->picture_ptr->flags |= AV_FRAME_FLAG_KEY; | |
| 304 | } | ||
| 305 | |||
| 306 |
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31 | if (s->got_mxm_bitmask) { |
| 307 | 31 | AVFrame *reference_ptr = s->picture[s->picture_index ^ 1]; | |
| 308 |
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31 | if (mxpeg_check_dimensions(s, jpg, reference_ptr) < 0) |
| 309 | ✗ | break; | |
| 310 | |||
| 311 | /* allocate dummy reference picture if needed */ | ||
| 312 |
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33 | if (!reference_ptr->data[0] && |
| 313 | 2 | (ret = ff_get_buffer(avctx, reference_ptr, | |
| 314 | AV_GET_BUFFER_FLAG_REF)) < 0) | ||
| 315 | ✗ | return ret; | |
| 316 | |||
| 317 | 31 | ret = ff_mjpeg_decode_sos(jpg, s->mxm_bitmask, s->bitmask_size, reference_ptr); | |
| 318 |
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31 | if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) |
| 319 | ✗ | return ret; | |
| 320 | } else { | ||
| 321 | ✗ | ret = ff_mjpeg_decode_sos(jpg, NULL, 0, NULL); | |
| 322 | ✗ | if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) | |
| 323 | ✗ | return ret; | |
| 324 | } | ||
| 325 | |||
| 326 | 31 | break; | |
| 327 | } | ||
| 328 | |||
| 329 | 171 | buf_ptr += (get_bits_count(&jpg->gb)+7) >> 3; | |
| 330 | } | ||
| 331 | |||
| 332 | } | ||
| 333 | |||
| 334 | ✗ | the_end: | |
| 335 |
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31 | if (jpg->got_picture) { |
| 336 | 31 | int ret = av_frame_ref(rframe, jpg->picture_ptr); | |
| 337 |
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31 | if (ret < 0) |
| 338 | ✗ | return ret; | |
| 339 | 31 | *got_frame = 1; | |
| 340 | |||
| 341 | 31 | s->picture_index ^= 1; | |
| 342 | 31 | jpg->picture_ptr = s->picture[s->picture_index]; | |
| 343 | |||
| 344 |
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31 | if (!s->has_complete_frame) { |
| 345 | ✗ | if (!s->got_mxm_bitmask) | |
| 346 | ✗ | s->has_complete_frame = 1; | |
| 347 | else | ||
| 348 | ✗ | *got_frame = 0; | |
| 349 | } | ||
| 350 | } | ||
| 351 | |||
| 352 | 31 | return buf_ptr - buf; | |
| 353 | } | ||
| 354 | |||
| 355 | const FFCodec ff_mxpeg_decoder = { | ||
| 356 | .p.name = "mxpeg", | ||
| 357 | CODEC_LONG_NAME("Mobotix MxPEG video"), | ||
| 358 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
| 359 | .p.id = AV_CODEC_ID_MXPEG, | ||
| 360 | .priv_data_size = sizeof(MXpegDecodeContext), | ||
| 361 | .init = mxpeg_decode_init, | ||
| 362 | .close = mxpeg_decode_end, | ||
| 363 | FF_CODEC_DECODE_CB(mxpeg_decode_frame), | ||
| 364 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
| 365 | .p.max_lowres = 3, | ||
| 366 | .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, | ||
| 367 | }; | ||
| 368 |