| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * DHAV demuxer | ||
| 3 | * | ||
| 4 | * Copyright (c) 2018 Paul B Mahol | ||
| 5 | * | ||
| 6 | * This file is part of FFmpeg. | ||
| 7 | * | ||
| 8 | * FFmpeg is free software; you can redistribute it and/or | ||
| 9 | * modify it under the terms of the GNU Lesser General Public | ||
| 10 | * License as published by the Free Software Foundation; either | ||
| 11 | * version 2.1 of the License, or (at your option) any later version. | ||
| 12 | * | ||
| 13 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 16 | * Lesser General Public License for more details. | ||
| 17 | * | ||
| 18 | * You should have received a copy of the GNU Lesser General Public | ||
| 19 | * License along with FFmpeg; if not, write to the Free Software | ||
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 21 | */ | ||
| 22 | |||
| 23 | #include <time.h> | ||
| 24 | |||
| 25 | #include "libavutil/intreadwrite.h" | ||
| 26 | #include "libavutil/mem.h" | ||
| 27 | #include "libavutil/parseutils.h" | ||
| 28 | #include "avio_internal.h" | ||
| 29 | #include "avformat.h" | ||
| 30 | #include "demux.h" | ||
| 31 | #include "internal.h" | ||
| 32 | |||
| 33 | typedef struct DHAVContext { | ||
| 34 | unsigned type; | ||
| 35 | unsigned subtype; | ||
| 36 | unsigned channel; | ||
| 37 | unsigned frame_subnumber; | ||
| 38 | unsigned frame_number; | ||
| 39 | unsigned date; | ||
| 40 | unsigned timestamp; | ||
| 41 | int width, height; | ||
| 42 | int video_codec; | ||
| 43 | int frame_rate; | ||
| 44 | int audio_channels; | ||
| 45 | int audio_codec; | ||
| 46 | int sample_rate; | ||
| 47 | int64_t last_good_pos; | ||
| 48 | int64_t duration; | ||
| 49 | |||
| 50 | int video_stream_index; | ||
| 51 | int audio_stream_index; | ||
| 52 | } DHAVContext; | ||
| 53 | |||
| 54 | typedef struct DHAVStream { | ||
| 55 | int64_t last_frame_number; | ||
| 56 | int64_t last_timestamp; | ||
| 57 | int64_t last_time; | ||
| 58 | int64_t pts; | ||
| 59 | } DHAVStream; | ||
| 60 | |||
| 61 | 7241 | static int dhav_probe(const AVProbeData *p) | |
| 62 | { | ||
| 63 |
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7241 | if (!memcmp(p->buf, "DAHUA", 5)) |
| 64 | ✗ | return AVPROBE_SCORE_MAX; | |
| 65 | |||
| 66 |
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7241 | if (memcmp(p->buf, "DHAV", 4)) |
| 67 | 7241 | return 0; | |
| 68 | |||
| 69 | ✗ | if (p->buf[4] == 0xf0 || | |
| 70 | ✗ | p->buf[4] == 0xf1 || | |
| 71 | ✗ | p->buf[4] == 0xfc || | |
| 72 | ✗ | p->buf[4] == 0xfd) | |
| 73 | ✗ | return AVPROBE_SCORE_MAX; | |
| 74 | ✗ | return 0; | |
| 75 | } | ||
| 76 | |||
| 77 | static const uint32_t sample_rates[] = { | ||
| 78 | 8000, 4000, 8000, 11025, 16000, | ||
| 79 | 20000, 22050, 32000, 44100, 48000, | ||
| 80 | 96000, 192000, 64000, | ||
| 81 | }; | ||
| 82 | |||
| 83 | ✗ | static int parse_ext(AVFormatContext *s, int length) | |
| 84 | { | ||
| 85 | ✗ | DHAVContext *dhav = s->priv_data; | |
| 86 | ✗ | int64_t ret = 0; | |
| 87 | |||
| 88 | ✗ | while (length > 0) { | |
| 89 | ✗ | int type = avio_r8(s->pb); | |
| 90 | int index; | ||
| 91 | |||
| 92 | ✗ | switch (type) { | |
| 93 | ✗ | case 0x80: | |
| 94 | ✗ | ret = avio_skip(s->pb, 1); | |
| 95 | ✗ | dhav->width = 8 * avio_r8(s->pb); | |
| 96 | ✗ | dhav->height = 8 * avio_r8(s->pb); | |
| 97 | ✗ | length -= 4; | |
| 98 | ✗ | break; | |
| 99 | ✗ | case 0x81: | |
| 100 | ✗ | ret = avio_skip(s->pb, 1); | |
| 101 | ✗ | dhav->video_codec = avio_r8(s->pb); | |
| 102 | ✗ | dhav->frame_rate = avio_r8(s->pb); | |
| 103 | ✗ | length -= 4; | |
| 104 | ✗ | break; | |
| 105 | ✗ | case 0x82: | |
| 106 | ✗ | ret = avio_skip(s->pb, 3); | |
| 107 | ✗ | dhav->width = avio_rl16(s->pb); | |
| 108 | ✗ | dhav->height = avio_rl16(s->pb); | |
| 109 | ✗ | length -= 8; | |
| 110 | ✗ | break; | |
| 111 | ✗ | case 0x83: | |
| 112 | ✗ | dhav->audio_channels = avio_r8(s->pb); | |
| 113 | ✗ | dhav->audio_codec = avio_r8(s->pb); | |
| 114 | ✗ | index = avio_r8(s->pb); | |
| 115 | ✗ | if (index < FF_ARRAY_ELEMS(sample_rates)) { | |
| 116 | ✗ | dhav->sample_rate = sample_rates[index]; | |
| 117 | } else { | ||
| 118 | ✗ | dhav->sample_rate = 8000; | |
| 119 | } | ||
| 120 | ✗ | length -= 4; | |
| 121 | ✗ | break; | |
| 122 | ✗ | case 0x88: | |
| 123 | ✗ | ret = avio_skip(s->pb, 7); | |
| 124 | ✗ | length -= 8; | |
| 125 | ✗ | break; | |
| 126 | ✗ | case 0x8c: | |
| 127 | ✗ | ret = avio_skip(s->pb, 1); | |
| 128 | ✗ | dhav->audio_channels = avio_r8(s->pb); | |
| 129 | ✗ | dhav->audio_codec = avio_r8(s->pb); | |
| 130 | ✗ | index = avio_r8(s->pb); | |
| 131 | ✗ | if (index < FF_ARRAY_ELEMS(sample_rates)) { | |
| 132 | ✗ | dhav->sample_rate = sample_rates[index]; | |
| 133 | } else { | ||
| 134 | ✗ | dhav->sample_rate = 8000; | |
| 135 | } | ||
| 136 | ✗ | ret = avio_skip(s->pb, 3); | |
| 137 | ✗ | length -= 8; | |
| 138 | ✗ | break; | |
| 139 | ✗ | case 0x91: | |
| 140 | case 0x92: | ||
| 141 | case 0x93: | ||
| 142 | case 0x95: | ||
| 143 | case 0x9a: | ||
| 144 | case 0x9b: // sample aspect ratio | ||
| 145 | case 0xb3: | ||
| 146 | ✗ | ret = avio_skip(s->pb, 7); | |
| 147 | ✗ | length -= 8; | |
| 148 | ✗ | break; | |
| 149 | ✗ | case 0x84: | |
| 150 | case 0x85: | ||
| 151 | case 0x8b: | ||
| 152 | case 0x94: | ||
| 153 | case 0x96: | ||
| 154 | case 0xa0: | ||
| 155 | case 0xb2: | ||
| 156 | case 0xb4: | ||
| 157 | ✗ | ret = avio_skip(s->pb, 3); | |
| 158 | ✗ | length -= 4; | |
| 159 | ✗ | break; | |
| 160 | ✗ | default: | |
| 161 | ✗ | av_log(s, AV_LOG_INFO, "Unknown type: %X, skipping rest of header.\n", type); | |
| 162 | ✗ | ret = avio_skip(s->pb, length - 1); | |
| 163 | ✗ | length = 0; | |
| 164 | } | ||
| 165 | |||
| 166 | ✗ | if (ret < 0) | |
| 167 | ✗ | return ret; | |
| 168 | } | ||
| 169 | |||
| 170 | ✗ | return 0; | |
| 171 | } | ||
| 172 | |||
| 173 | ✗ | static int read_chunk(AVFormatContext *s) | |
| 174 | { | ||
| 175 | ✗ | DHAVContext *dhav = s->priv_data; | |
| 176 | int frame_length, ext_length; | ||
| 177 | int64_t start, end, ret; | ||
| 178 | |||
| 179 | ✗ | if (avio_feof(s->pb)) | |
| 180 | ✗ | return AVERROR_EOF; | |
| 181 | |||
| 182 | ✗ | while (avio_r8(s->pb) != 'D' || avio_r8(s->pb) != 'H' || avio_r8(s->pb) != 'A' || avio_r8(s->pb) != 'V') { | |
| 183 | ✗ | if (avio_feof(s->pb)) | |
| 184 | ✗ | return AVERROR_EOF; | |
| 185 | } | ||
| 186 | |||
| 187 | ✗ | start = avio_tell(s->pb) - 4; | |
| 188 | ✗ | dhav->last_good_pos = start; | |
| 189 | ✗ | dhav->type = avio_r8(s->pb); | |
| 190 | ✗ | dhav->subtype = avio_r8(s->pb); | |
| 191 | ✗ | dhav->channel = avio_r8(s->pb); | |
| 192 | ✗ | dhav->frame_subnumber = avio_r8(s->pb); | |
| 193 | ✗ | dhav->frame_number = avio_rl32(s->pb); | |
| 194 | ✗ | frame_length = avio_rl32(s->pb); | |
| 195 | ✗ | dhav->date = avio_rl32(s->pb); | |
| 196 | |||
| 197 | ✗ | if (frame_length < 24) | |
| 198 | ✗ | return AVERROR_INVALIDDATA; | |
| 199 | ✗ | if (dhav->type == 0xf1) { | |
| 200 | ✗ | ret = avio_skip(s->pb, frame_length - 20); | |
| 201 | ✗ | return ret < 0 ? ret : 0; | |
| 202 | } | ||
| 203 | |||
| 204 | ✗ | dhav->timestamp = avio_rl16(s->pb); | |
| 205 | ✗ | ext_length = avio_r8(s->pb); | |
| 206 | ✗ | avio_skip(s->pb, 1); // checksum | |
| 207 | |||
| 208 | ✗ | ret = parse_ext(s, ext_length); | |
| 209 | ✗ | if (ret < 0) | |
| 210 | ✗ | return ret; | |
| 211 | |||
| 212 | ✗ | end = avio_tell(s->pb); | |
| 213 | |||
| 214 | ✗ | return frame_length - 8 - (end - start); | |
| 215 | } | ||
| 216 | |||
| 217 | ✗ | static void get_timeinfo(unsigned date, struct tm *timeinfo) | |
| 218 | { | ||
| 219 | int year, month, day, hour, min, sec; | ||
| 220 | |||
| 221 | ✗ | sec = date & 0x3F; | |
| 222 | ✗ | min = (date >> 6) & 0x3F; | |
| 223 | ✗ | hour = (date >> 12) & 0x1F; | |
| 224 | ✗ | day = (date >> 17) & 0x1F; | |
| 225 | ✗ | month = (date >> 22) & 0x0F; | |
| 226 | ✗ | year = ((date >> 26) & 0x3F) + 2000; | |
| 227 | |||
| 228 | ✗ | timeinfo->tm_year = year - 1900; | |
| 229 | ✗ | timeinfo->tm_mon = month - 1; | |
| 230 | ✗ | timeinfo->tm_mday = day; | |
| 231 | ✗ | timeinfo->tm_hour = hour; | |
| 232 | ✗ | timeinfo->tm_min = min; | |
| 233 | ✗ | timeinfo->tm_sec = sec; | |
| 234 | ✗ | } | |
| 235 | |||
| 236 | #define MAX_DURATION_BUFFER_SIZE (1024*1024) | ||
| 237 | |||
| 238 | ✗ | static int64_t get_duration(AVFormatContext *s) | |
| 239 | { | ||
| 240 | ✗ | if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) | |
| 241 | ✗ | return 0; | |
| 242 | |||
| 243 | ✗ | int64_t start_pos = avio_tell(s->pb); | |
| 244 | ✗ | int64_t pos = -1; | |
| 245 | ✗ | int64_t start = 0, end = 0; | |
| 246 | struct tm timeinfo; | ||
| 247 | uint8_t *buffer; | ||
| 248 | int64_t buffer_size; | ||
| 249 | int64_t buffer_pos; | ||
| 250 | int64_t offset; | ||
| 251 | unsigned date; | ||
| 252 | ✗ | int64_t size = avio_size(s->pb); | |
| 253 | |||
| 254 | ✗ | if (start_pos + 16 > size) | |
| 255 | ✗ | return 0; | |
| 256 | |||
| 257 | ✗ | avio_skip(s->pb, 16); | |
| 258 | ✗ | date = avio_rl32(s->pb); | |
| 259 | ✗ | get_timeinfo(date, &timeinfo); | |
| 260 | ✗ | start = av_timegm(&timeinfo) * 1000LL; | |
| 261 | |||
| 262 | ✗ | buffer_size = FFMIN(MAX_DURATION_BUFFER_SIZE, size); | |
| 263 | ✗ | buffer = av_malloc(buffer_size); | |
| 264 | ✗ | if (!buffer) | |
| 265 | ✗ | goto fail; | |
| 266 | ✗ | buffer_pos = size - buffer_size; | |
| 267 | ✗ | avio_seek(s->pb, buffer_pos, SEEK_SET); | |
| 268 | ✗ | if (ffio_read_size(s->pb, buffer, buffer_size) < 0) | |
| 269 | ✗ | goto fail; | |
| 270 | |||
| 271 | ✗ | offset = buffer_size - 8; | |
| 272 | ✗ | while (offset > 0) { | |
| 273 | ✗ | if (AV_RL32(buffer + offset) == MKTAG('d','h','a','v')) { | |
| 274 | ✗ | int64_t seek_back = AV_RL32(buffer + offset + 4); | |
| 275 | ✗ | pos = buffer_pos + offset - seek_back + 8; | |
| 276 | ✗ | break; | |
| 277 | } else { | ||
| 278 | ✗ | offset -= 9; | |
| 279 | } | ||
| 280 | } | ||
| 281 | |||
| 282 | ✗ | if (pos < buffer_pos || pos + 16 > buffer_pos + buffer_size) | |
| 283 | ✗ | goto fail; | |
| 284 | |||
| 285 | ✗ | date = AV_RL32(buffer + (pos - buffer_pos) + 16); | |
| 286 | ✗ | get_timeinfo(date, &timeinfo); | |
| 287 | ✗ | end = av_timegm(&timeinfo) * 1000LL; | |
| 288 | |||
| 289 | ✗ | av_freep(&buffer); | |
| 290 | |||
| 291 | ✗ | avio_seek(s->pb, start_pos, SEEK_SET); | |
| 292 | |||
| 293 | ✗ | return end - start; | |
| 294 | ✗ | fail: | |
| 295 | ✗ | av_freep(&buffer); | |
| 296 | ✗ | avio_seek(s->pb, start_pos, SEEK_SET); | |
| 297 | ✗ | return 0; | |
| 298 | } | ||
| 299 | |||
| 300 | ✗ | static int dhav_read_header(AVFormatContext *s) | |
| 301 | { | ||
| 302 | ✗ | DHAVContext *dhav = s->priv_data; | |
| 303 | uint8_t signature[5]; | ||
| 304 | ✗ | int ret = ffio_ensure_seekback(s->pb, 5); | |
| 305 | |||
| 306 | ✗ | if (ret < 0) | |
| 307 | ✗ | return ret; | |
| 308 | |||
| 309 | ✗ | ret = ffio_read_size(s->pb, signature, sizeof(signature)); | |
| 310 | ✗ | if (ret < 0) | |
| 311 | ✗ | return ret; | |
| 312 | ✗ | if (!memcmp(signature, "DAHUA", 5)) { | |
| 313 | ✗ | avio_skip(s->pb, 0x400 - 5); | |
| 314 | ✗ | dhav->last_good_pos = avio_tell(s->pb); | |
| 315 | } else { | ||
| 316 | ✗ | if (!memcmp(signature, "DHAV", 4)) { | |
| 317 | ✗ | avio_seek(s->pb, -5, SEEK_CUR); | |
| 318 | ✗ | dhav->last_good_pos = avio_tell(s->pb); | |
| 319 | ✗ | } else if (s->pb->seekable) { | |
| 320 | ✗ | avio_seek(s->pb, avio_size(s->pb) - 8, SEEK_SET); | |
| 321 | ✗ | while (avio_rl32(s->pb) == MKTAG('d','h','a','v')) { | |
| 322 | int seek_back; | ||
| 323 | |||
| 324 | ✗ | seek_back = avio_rl32(s->pb) + 8; | |
| 325 | ✗ | if (seek_back < 9) | |
| 326 | ✗ | break; | |
| 327 | ✗ | dhav->last_good_pos = avio_tell(s->pb); | |
| 328 | ✗ | avio_seek(s->pb, -seek_back, SEEK_CUR); | |
| 329 | } | ||
| 330 | ✗ | avio_seek(s->pb, dhav->last_good_pos, SEEK_SET); | |
| 331 | } | ||
| 332 | } | ||
| 333 | |||
| 334 | ✗ | dhav->duration = get_duration(s); | |
| 335 | ✗ | dhav->last_good_pos = avio_tell(s->pb); | |
| 336 | ✗ | s->ctx_flags |= AVFMTCTX_NOHEADER; | |
| 337 | ✗ | dhav->video_stream_index = -1; | |
| 338 | ✗ | dhav->audio_stream_index = -1; | |
| 339 | |||
| 340 | ✗ | return 0; | |
| 341 | } | ||
| 342 | |||
| 343 | ✗ | static int64_t get_pts(AVFormatContext *s, int stream_index) | |
| 344 | { | ||
| 345 | ✗ | DHAVStream *dst = s->streams[stream_index]->priv_data; | |
| 346 | ✗ | DHAVContext *dhav = s->priv_data; | |
| 347 | struct tm timeinfo; | ||
| 348 | time_t t; | ||
| 349 | |||
| 350 | ✗ | get_timeinfo(dhav->date, &timeinfo); | |
| 351 | |||
| 352 | ✗ | t = av_timegm(&timeinfo); | |
| 353 | ✗ | if (dst->last_time == t) { | |
| 354 | ✗ | int64_t diff = dhav->timestamp - dst->last_timestamp; | |
| 355 | |||
| 356 | ✗ | if (diff < 0) | |
| 357 | ✗ | diff += 65535; | |
| 358 | ✗ | if (diff == 0 && dhav->frame_rate) | |
| 359 | ✗ | diff = av_rescale(dhav->frame_number - dst->last_frame_number, 1000, dhav->frame_rate); | |
| 360 | ✗ | dst->pts += diff; | |
| 361 | } else { | ||
| 362 | ✗ | dst->pts = t * 1000LL; | |
| 363 | } | ||
| 364 | |||
| 365 | ✗ | dst->last_time = t; | |
| 366 | ✗ | dst->last_timestamp = dhav->timestamp; | |
| 367 | ✗ | dst->last_frame_number = dhav->frame_number; | |
| 368 | |||
| 369 | ✗ | return dst->pts; | |
| 370 | } | ||
| 371 | |||
| 372 | ✗ | static int dhav_read_packet(AVFormatContext *s, AVPacket *pkt) | |
| 373 | { | ||
| 374 | ✗ | DHAVContext *dhav = s->priv_data; | |
| 375 | int size, ret, stream_index; | ||
| 376 | |||
| 377 | ✗ | retry: | |
| 378 | ✗ | while ((ret = read_chunk(s)) == 0) | |
| 379 | ; | ||
| 380 | |||
| 381 | ✗ | if (ret < 0) | |
| 382 | ✗ | return ret; | |
| 383 | |||
| 384 | ✗ | if (dhav->type == 0xfd && dhav->video_stream_index == -1) { | |
| 385 | ✗ | AVStream *st = avformat_new_stream(s, NULL); | |
| 386 | DHAVStream *dst; | ||
| 387 | |||
| 388 | ✗ | if (!st) | |
| 389 | ✗ | return AVERROR(ENOMEM); | |
| 390 | |||
| 391 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; | |
| 392 | ✗ | switch (dhav->video_codec) { | |
| 393 | ✗ | case 0x1: st->codecpar->codec_id = AV_CODEC_ID_MPEG4; break; | |
| 394 | ✗ | case 0x3: st->codecpar->codec_id = AV_CODEC_ID_MJPEG; break; | |
| 395 | ✗ | case 0x2: | |
| 396 | case 0x4: | ||
| 397 | ✗ | case 0x8: st->codecpar->codec_id = AV_CODEC_ID_H264; break; | |
| 398 | ✗ | case 0xc: st->codecpar->codec_id = AV_CODEC_ID_HEVC; break; | |
| 399 | ✗ | default: avpriv_request_sample(s, "Unknown video codec %X", dhav->video_codec); | |
| 400 | } | ||
| 401 | ✗ | st->duration = dhav->duration; | |
| 402 | ✗ | st->codecpar->width = dhav->width; | |
| 403 | ✗ | st->codecpar->height = dhav->height; | |
| 404 | ✗ | st->avg_frame_rate.num = dhav->frame_rate; | |
| 405 | ✗ | st->avg_frame_rate.den = 1; | |
| 406 | ✗ | st->priv_data = dst = av_mallocz(sizeof(DHAVStream)); | |
| 407 | ✗ | if (!st->priv_data) | |
| 408 | ✗ | return AVERROR(ENOMEM); | |
| 409 | ✗ | dst->last_time = AV_NOPTS_VALUE; | |
| 410 | ✗ | dhav->video_stream_index = st->index; | |
| 411 | |||
| 412 | ✗ | avpriv_set_pts_info(st, 64, 1, 1000); | |
| 413 | ✗ | } else if (dhav->type == 0xf0 && dhav->audio_stream_index == -1) { | |
| 414 | ✗ | AVStream *st = avformat_new_stream(s, NULL); | |
| 415 | DHAVStream *dst; | ||
| 416 | |||
| 417 | ✗ | if (!st) | |
| 418 | ✗ | return AVERROR(ENOMEM); | |
| 419 | |||
| 420 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 421 | ✗ | switch (dhav->audio_codec) { | |
| 422 | ✗ | case 0x07: st->codecpar->codec_id = AV_CODEC_ID_PCM_S8; break; | |
| 423 | ✗ | case 0x0c: st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE; break; | |
| 424 | ✗ | case 0x10: st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE; break; | |
| 425 | ✗ | case 0x0a: st->codecpar->codec_id = AV_CODEC_ID_PCM_MULAW; break; | |
| 426 | ✗ | case 0x16: st->codecpar->codec_id = AV_CODEC_ID_PCM_MULAW; break; | |
| 427 | ✗ | case 0x0e: st->codecpar->codec_id = AV_CODEC_ID_PCM_ALAW; break; | |
| 428 | ✗ | case 0x1a: st->codecpar->codec_id = AV_CODEC_ID_AAC; break; | |
| 429 | ✗ | case 0x1f: st->codecpar->codec_id = AV_CODEC_ID_MP2; break; | |
| 430 | ✗ | case 0x21: st->codecpar->codec_id = AV_CODEC_ID_MP3; break; | |
| 431 | ✗ | case 0x0d: st->codecpar->codec_id = AV_CODEC_ID_ADPCM_MS; break; | |
| 432 | ✗ | default: avpriv_request_sample(s, "Unknown audio codec %X", dhav->audio_codec); | |
| 433 | } | ||
| 434 | ✗ | st->duration = dhav->duration; | |
| 435 | ✗ | st->codecpar->ch_layout.nb_channels = dhav->audio_channels; | |
| 436 | ✗ | st->codecpar->sample_rate = dhav->sample_rate; | |
| 437 | ✗ | st->priv_data = dst = av_mallocz(sizeof(DHAVStream)); | |
| 438 | ✗ | if (!st->priv_data) | |
| 439 | ✗ | return AVERROR(ENOMEM); | |
| 440 | ✗ | dst->last_time = AV_NOPTS_VALUE; | |
| 441 | ✗ | dhav->audio_stream_index = st->index; | |
| 442 | |||
| 443 | ✗ | avpriv_set_pts_info(st, 64, 1, 1000); | |
| 444 | } | ||
| 445 | |||
| 446 | ✗ | stream_index = dhav->type == 0xf0 ? dhav->audio_stream_index : dhav->video_stream_index; | |
| 447 | ✗ | if (stream_index < 0) { | |
| 448 | ✗ | avio_skip(s->pb, ret); | |
| 449 | ✗ | if (avio_rl32(s->pb) == MKTAG('d','h','a','v')) | |
| 450 | ✗ | avio_skip(s->pb, 4); | |
| 451 | ✗ | goto retry; | |
| 452 | } | ||
| 453 | |||
| 454 | ✗ | size = ret; | |
| 455 | ✗ | ret = av_get_packet(s->pb, pkt, size); | |
| 456 | ✗ | if (ret < 0) | |
| 457 | ✗ | return ret; | |
| 458 | ✗ | pkt->stream_index = stream_index; | |
| 459 | ✗ | if (dhav->type != 0xfc) | |
| 460 | ✗ | pkt->flags |= AV_PKT_FLAG_KEY; | |
| 461 | ✗ | pkt->duration = 1; | |
| 462 | ✗ | if (pkt->stream_index >= 0) | |
| 463 | ✗ | pkt->pts = get_pts(s, pkt->stream_index); | |
| 464 | ✗ | pkt->pos = dhav->last_good_pos; | |
| 465 | ✗ | if (avio_rl32(s->pb) == MKTAG('d','h','a','v')) | |
| 466 | ✗ | avio_skip(s->pb, 4); | |
| 467 | |||
| 468 | ✗ | return ret; | |
| 469 | } | ||
| 470 | |||
| 471 | ✗ | static int dhav_read_seek(AVFormatContext *s, int stream_index, | |
| 472 | int64_t timestamp, int flags) | ||
| 473 | { | ||
| 474 | ✗ | DHAVContext *dhav = s->priv_data; | |
| 475 | ✗ | AVStream *st = s->streams[stream_index]; | |
| 476 | ✗ | FFStream *const sti = ffstream(st); | |
| 477 | ✗ | int index = av_index_search_timestamp(st, timestamp, flags); | |
| 478 | int64_t pts; | ||
| 479 | |||
| 480 | ✗ | if (index < 0) | |
| 481 | ✗ | return -1; | |
| 482 | ✗ | pts = sti->index_entries[index].timestamp; | |
| 483 | ✗ | if (pts < timestamp) | |
| 484 | ✗ | return AVERROR(EAGAIN); | |
| 485 | ✗ | if (avio_seek(s->pb, sti->index_entries[index].pos, SEEK_SET) < 0) | |
| 486 | ✗ | return -1; | |
| 487 | |||
| 488 | ✗ | for (int n = 0; n < s->nb_streams; n++) { | |
| 489 | ✗ | AVStream *st = s->streams[n]; | |
| 490 | ✗ | DHAVStream *dst = st->priv_data; | |
| 491 | |||
| 492 | ✗ | dst->pts = pts; | |
| 493 | ✗ | dst->last_time = AV_NOPTS_VALUE; | |
| 494 | } | ||
| 495 | ✗ | dhav->last_good_pos = avio_tell(s->pb); | |
| 496 | |||
| 497 | ✗ | return 0; | |
| 498 | } | ||
| 499 | |||
| 500 | const FFInputFormat ff_dhav_demuxer = { | ||
| 501 | .p.name = "dhav", | ||
| 502 | .p.long_name = NULL_IF_CONFIG_SMALL("Video DAV"), | ||
| 503 | .p.extensions = "dav", | ||
| 504 | .p.flags = AVFMT_GENERIC_INDEX | AVFMT_NO_BYTE_SEEK | AVFMT_TS_DISCONT | AVFMT_TS_NONSTRICT | AVFMT_SEEK_TO_PTS, | ||
| 505 | .priv_data_size = sizeof(DHAVContext), | ||
| 506 | .read_probe = dhav_probe, | ||
| 507 | .read_header = dhav_read_header, | ||
| 508 | .read_packet = dhav_read_packet, | ||
| 509 | .read_seek = dhav_read_seek, | ||
| 510 | }; | ||
| 511 |