| 1 | /* |
| 2 | * ASF compatible demuxer |
| 3 | * Copyright (c) 2000, 2001 Fabrice Bellard |
| 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 <inttypes.h> |
| 23 | |
| 24 | #include "libavutil/attributes.h" |
| 25 | #include "libavutil/avassert.h" |
| 26 | #include "libavutil/avstring.h" |
| 27 | #include "libavutil/bswap.h" |
| 28 | #include "libavutil/common.h" |
| 29 | #include "libavutil/dict.h" |
| 30 | #include "libavutil/internal.h" |
| 31 | #include "libavutil/mathematics.h" |
| 32 | #include "libavutil/opt.h" |
| 33 | #include "avformat.h" |
| 34 | #include "avio_internal.h" |
| 35 | #include "avlanguage.h" |
| 36 | #include "id3v2.h" |
| 37 | #include "internal.h" |
| 38 | #include "riff.h" |
| 39 | #include "asf.h" |
| 40 | #include "asfcrypt.h" |
| 41 | |
| 42 | typedef struct { |
| 43 | const AVClass *class; |
| 44 | int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID |
| 45 | ASFStream streams[128]; ///< it's max number and it's not that big |
| 46 | uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming) |
| 47 | AVRational dar[128]; |
| 48 | char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US) |
| 49 | /* non streamed additonnal info */ |
| 50 | /* packet filling */ |
| 51 | int packet_size_left; |
| 52 | /* only for reading */ |
| 53 | uint64_t data_offset; ///< beginning of the first data packet |
| 54 | uint64_t data_object_offset; ///< data object offset (excl. GUID & size) |
| 55 | uint64_t data_object_size; ///< size of the data object |
| 56 | int index_read; |
| 57 | |
| 58 | ASFMainHeader hdr; |
| 59 | |
| 60 | int packet_flags; |
| 61 | int packet_property; |
| 62 | int packet_timestamp; |
| 63 | int packet_segsizetype; |
| 64 | int packet_segments; |
| 65 | int packet_seq; |
| 66 | int packet_replic_size; |
| 67 | int packet_key_frame; |
| 68 | int packet_padsize; |
| 69 | unsigned int packet_frag_offset; |
| 70 | unsigned int packet_frag_size; |
| 71 | int64_t packet_frag_timestamp; |
| 72 | int ts_is_pts; |
| 73 | int packet_multi_size; |
| 74 | int packet_time_delta; |
| 75 | int packet_time_start; |
| 76 | int64_t packet_pos; |
| 77 | |
| 78 | int stream_index; |
| 79 | |
| 80 | ASFStream *asf_st; ///< currently decoded stream |
| 81 | |
| 82 | int no_resync_search; |
| 83 | } ASFContext; |
| 84 | |
| 85 | static const AVOption options[] = { |
| 86 | { "no_resync_search", "Don't try to resynchronize by looking for a certain optional start code", offsetof(ASFContext, no_resync_search), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM }, |
| 87 | { NULL }, |
| 88 | }; |
| 89 | |
| 90 | static const AVClass asf_class = { |
| 91 | .class_name = "asf demuxer", |
| 92 | .item_name = av_default_item_name, |
| 93 | .option = options, |
| 94 | .version = LIBAVUTIL_VERSION_INT, |
| 95 | }; |
| 96 | |
| 97 | #undef NDEBUG |
| 98 | #include <assert.h> |
| 99 | |
| 100 | #define ASF_MAX_STREAMS 127 |
| 101 | #define FRAME_HEADER_SIZE 16 |
| 102 | // Fix Me! FRAME_HEADER_SIZE may be different. (17 is known to be too large) |
| 103 | |
| 104 | #ifdef DEBUG |
| 105 | static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */ |
| 106 | 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2 |
| 107 | }; |
| 108 | |
| 109 | #define PRINT_IF_GUID(g, cmp) \ |
| 110 | if (!ff_guidcmp(g, &cmp)) \ |
| 111 | av_dlog(NULL, "(GUID: %s) ", # cmp) |
| 112 | |
| 113 | static void print_guid(ff_asf_guid *g) |
| 114 | { |
| 115 | int i; |
| 116 | PRINT_IF_GUID(g, ff_asf_header); |
| 117 | else PRINT_IF_GUID(g, ff_asf_file_header); |
| 118 | else PRINT_IF_GUID(g, ff_asf_stream_header); |
| 119 | else PRINT_IF_GUID(g, ff_asf_audio_stream); |
| 120 | else PRINT_IF_GUID(g, ff_asf_audio_conceal_none); |
| 121 | else PRINT_IF_GUID(g, ff_asf_video_stream); |
| 122 | else PRINT_IF_GUID(g, ff_asf_video_conceal_none); |
| 123 | else PRINT_IF_GUID(g, ff_asf_command_stream); |
| 124 | else PRINT_IF_GUID(g, ff_asf_comment_header); |
| 125 | else PRINT_IF_GUID(g, ff_asf_codec_comment_header); |
| 126 | else PRINT_IF_GUID(g, ff_asf_codec_comment1_header); |
| 127 | else PRINT_IF_GUID(g, ff_asf_data_header); |
| 128 | else PRINT_IF_GUID(g, ff_asf_simple_index_header); |
| 129 | else PRINT_IF_GUID(g, ff_asf_head1_guid); |
| 130 | else PRINT_IF_GUID(g, ff_asf_head2_guid); |
| 131 | else PRINT_IF_GUID(g, ff_asf_my_guid); |
| 132 | else PRINT_IF_GUID(g, ff_asf_ext_stream_header); |
| 133 | else PRINT_IF_GUID(g, ff_asf_extended_content_header); |
| 134 | else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header); |
| 135 | else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream); |
| 136 | else PRINT_IF_GUID(g, ff_asf_metadata_header); |
| 137 | else PRINT_IF_GUID(g, ff_asf_metadata_library_header); |
| 138 | else PRINT_IF_GUID(g, ff_asf_marker_header); |
| 139 | else PRINT_IF_GUID(g, stream_bitrate_guid); |
| 140 | else PRINT_IF_GUID(g, ff_asf_language_guid); |
| 141 | else |
| 142 | av_dlog(NULL, "(GUID: unknown) "); |
| 143 | for (i = 0; i < 16; i++) |
| 144 | av_dlog(NULL, " 0x%02x,", (*g)[i]); |
| 145 | av_dlog(NULL, "}\n"); |
| 146 | } |
| 147 | #undef PRINT_IF_GUID |
| 148 | #else |
| 149 | #define print_guid(g) |
| 150 | #endif |
| 151 | |
| 152 | static int asf_probe(AVProbeData *pd) |
| 153 | { |
| 154 | /* check file header */ |
| 155 | if (!ff_guidcmp(pd->buf, &ff_asf_header)) |
| 156 | return AVPROBE_SCORE_MAX; |
| 157 | else |
| 158 | return 0; |
| 159 | } |
| 160 | |
| 161 | /* size of type 2 (BOOL) is 32bit for "Extended Content Description Object" |
| 162 | * but 16 bit for "Metadata Object" and "Metadata Library Object" */ |
| 163 | static int get_value(AVIOContext *pb, int type, int type2_size) |
| 164 | { |
| 165 | switch (type) { |
| 166 | case 2: |
| 167 | return (type2_size == 32) ? avio_rl32(pb) : avio_rl16(pb); |
| 168 | case 3: |
| 169 | return avio_rl32(pb); |
| 170 | case 4: |
| 171 | return avio_rl64(pb); |
| 172 | case 5: |
| 173 | return avio_rl16(pb); |
| 174 | default: |
| 175 | return INT_MIN; |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | /* MSDN claims that this should be "compatible with the ID3 frame, APIC", |
| 180 | * but in reality this is only loosely similar */ |
| 181 | static int asf_read_picture(AVFormatContext *s, int len) |
| 182 | { |
| 183 | AVPacket pkt = { 0 }; |
| 184 | const CodecMime *mime = ff_id3v2_mime_tags; |
| 185 | enum AVCodecID id = AV_CODEC_ID_NONE; |
| 186 | char mimetype[64]; |
| 187 | uint8_t *desc = NULL; |
| 188 | AVStream *st = NULL; |
| 189 | int ret, type, picsize, desc_len; |
| 190 | |
| 191 | /* type + picsize + mime + desc */ |
| 192 | if (len < 1 + 4 + 2 + 2) { |
| 193 | av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len); |
| 194 | return AVERROR_INVALIDDATA; |
| 195 | } |
| 196 | |
| 197 | /* picture type */ |
| 198 | type = avio_r8(s->pb); |
| 199 | len--; |
| 200 | if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) { |
| 201 | av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type); |
| 202 | type = 0; |
| 203 | } |
| 204 | |
| 205 | /* picture data size */ |
| 206 | picsize = avio_rl32(s->pb); |
| 207 | len -= 4; |
| 208 | |
| 209 | /* picture MIME type */ |
| 210 | len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype)); |
| 211 | while (mime->id != AV_CODEC_ID_NONE) { |
| 212 | if (!strncmp(mime->str, mimetype, sizeof(mimetype))) { |
| 213 | id = mime->id; |
| 214 | break; |
| 215 | } |
| 216 | mime++; |
| 217 | } |
| 218 | if (id == AV_CODEC_ID_NONE) { |
| 219 | av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n", |
| 220 | mimetype); |
| 221 | return 0; |
| 222 | } |
| 223 | |
| 224 | if (picsize >= len) { |
| 225 | av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n", |
| 226 | picsize, len); |
| 227 | return AVERROR_INVALIDDATA; |
| 228 | } |
| 229 | |
| 230 | /* picture description */ |
| 231 | desc_len = (len - picsize) * 2 + 1; |
| 232 | desc = av_malloc(desc_len); |
| 233 | if (!desc) |
| 234 | return AVERROR(ENOMEM); |
| 235 | len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len); |
| 236 | |
| 237 | ret = av_get_packet(s->pb, &pkt, picsize); |
| 238 | if (ret < 0) |
| 239 | goto fail; |
| 240 | |
| 241 | st = avformat_new_stream(s, NULL); |
| 242 | if (!st) { |
| 243 | ret = AVERROR(ENOMEM); |
| 244 | goto fail; |
| 245 | } |
| 246 | st->disposition |= AV_DISPOSITION_ATTACHED_PIC; |
| 247 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
| 248 | st->codec->codec_id = id; |
| 249 | st->attached_pic = pkt; |
| 250 | st->attached_pic.stream_index = st->index; |
| 251 | st->attached_pic.flags |= AV_PKT_FLAG_KEY; |
| 252 | |
| 253 | if (*desc) |
| 254 | av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL); |
| 255 | else |
| 256 | av_freep(&desc); |
| 257 | |
| 258 | av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0); |
| 259 | |
| 260 | return 0; |
| 261 | |
| 262 | fail: |
| 263 | av_freep(&desc); |
| 264 | av_free_packet(&pkt); |
| 265 | return ret; |
| 266 | } |
| 267 | |
| 268 | static void get_id3_tag(AVFormatContext *s, int len) |
| 269 | { |
| 270 | ID3v2ExtraMeta *id3v2_extra_meta = NULL; |
| 271 | |
| 272 | ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, len); |
| 273 | if (id3v2_extra_meta) |
| 274 | ff_id3v2_parse_apic(s, &id3v2_extra_meta); |
| 275 | ff_id3v2_free_extra_meta(&id3v2_extra_meta); |
| 276 | } |
| 277 | |
| 278 | static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size) |
| 279 | { |
| 280 | char *value; |
| 281 | int64_t off = avio_tell(s->pb); |
| 282 | #define LEN 22 |
| 283 | |
| 284 | if ((unsigned)len >= (UINT_MAX - LEN) / 2) |
| 285 | return; |
| 286 | |
| 287 | value = av_malloc(2 * len + LEN); |
| 288 | if (!value) |
| 289 | goto finish; |
| 290 | |
| 291 | if (type == 0) { // UTF16-LE |
| 292 | avio_get_str16le(s->pb, len, value, 2 * len + 1); |
| 293 | } else if (type == -1) { // ASCII |
| 294 | avio_read(s->pb, value, len); |
| 295 | value[len]=0; |
| 296 | } else if (type == 1) { // byte array |
| 297 | if (!strcmp(key, "WM/Picture")) { // handle cover art |
| 298 | asf_read_picture(s, len); |
| 299 | } else if (!strcmp(key, "ID3")) { // handle ID3 tag |
| 300 | get_id3_tag(s, len); |
| 301 | } else { |
| 302 | av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key); |
| 303 | } |
| 304 | goto finish; |
| 305 | } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD |
| 306 | uint64_t num = get_value(s->pb, type, type2_size); |
| 307 | snprintf(value, LEN, "%"PRIu64, num); |
| 308 | } else if (type == 6) { // (don't) handle GUID |
| 309 | av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key); |
| 310 | goto finish; |
| 311 | } else { |
| 312 | av_log(s, AV_LOG_DEBUG, |
| 313 | "Unsupported value type %d in tag %s.\n", type, key); |
| 314 | goto finish; |
| 315 | } |
| 316 | if (*value) |
| 317 | av_dict_set(&s->metadata, key, value, 0); |
| 318 | |
| 319 | finish: |
| 320 | av_freep(&value); |
| 321 | avio_seek(s->pb, off + len, SEEK_SET); |
| 322 | } |
| 323 | |
| 324 | static int asf_read_file_properties(AVFormatContext *s, int64_t size) |
| 325 | { |
| 326 | ASFContext *asf = s->priv_data; |
| 327 | AVIOContext *pb = s->pb; |
| 328 | |
| 329 | ff_get_guid(pb, &asf->hdr.guid); |
| 330 | asf->hdr.file_size = avio_rl64(pb); |
| 331 | asf->hdr.create_time = avio_rl64(pb); |
| 332 | avio_rl64(pb); /* number of packets */ |
| 333 | asf->hdr.play_time = avio_rl64(pb); |
| 334 | asf->hdr.send_time = avio_rl64(pb); |
| 335 | asf->hdr.preroll = avio_rl32(pb); |
| 336 | asf->hdr.ignore = avio_rl32(pb); |
| 337 | asf->hdr.flags = avio_rl32(pb); |
| 338 | asf->hdr.min_pktsize = avio_rl32(pb); |
| 339 | asf->hdr.max_pktsize = avio_rl32(pb); |
| 340 | if (asf->hdr.min_pktsize >= (1U << 29)) |
| 341 | return AVERROR_INVALIDDATA; |
| 342 | asf->hdr.max_bitrate = avio_rl32(pb); |
| 343 | s->packet_size = asf->hdr.max_pktsize; |
| 344 | |
| 345 | return 0; |
| 346 | } |
| 347 | |
| 348 | static int asf_read_stream_properties(AVFormatContext *s, int64_t size) |
| 349 | { |
| 350 | ASFContext *asf = s->priv_data; |
| 351 | AVIOContext *pb = s->pb; |
| 352 | AVStream *st; |
| 353 | ASFStream *asf_st; |
| 354 | ff_asf_guid g; |
| 355 | enum AVMediaType type; |
| 356 | int type_specific_size, sizeX; |
| 357 | unsigned int tag1; |
| 358 | int64_t pos1, pos2, start_time; |
| 359 | int test_for_ext_stream_audio, is_dvr_ms_audio = 0; |
| 360 | |
| 361 | if (s->nb_streams == ASF_MAX_STREAMS) { |
| 362 | av_log(s, AV_LOG_ERROR, "too many streams\n"); |
| 363 | return AVERROR(EINVAL); |
| 364 | } |
| 365 | |
| 366 | pos1 = avio_tell(pb); |
| 367 | |
| 368 | st = avformat_new_stream(s, NULL); |
| 369 | if (!st) |
| 370 | return AVERROR(ENOMEM); |
| 371 | avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */ |
| 372 | start_time = asf->hdr.preroll; |
| 373 | |
| 374 | if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming... |
| 375 | int64_t fsize = avio_size(pb); |
| 376 | if (fsize <= 0 || (int64_t)asf->hdr.file_size <= 0 || |
| 377 | FFABS(fsize - (int64_t)asf->hdr.file_size) / (float)FFMIN(fsize, asf->hdr.file_size) < 0.05) |
| 378 | st->duration = asf->hdr.play_time / |
| 379 | (10000000 / 1000) - start_time; |
| 380 | } |
| 381 | ff_get_guid(pb, &g); |
| 382 | |
| 383 | test_for_ext_stream_audio = 0; |
| 384 | if (!ff_guidcmp(&g, &ff_asf_audio_stream)) { |
| 385 | type = AVMEDIA_TYPE_AUDIO; |
| 386 | } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) { |
| 387 | type = AVMEDIA_TYPE_VIDEO; |
| 388 | } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) { |
| 389 | type = AVMEDIA_TYPE_VIDEO; |
| 390 | st->codec->codec_id = AV_CODEC_ID_MJPEG; |
| 391 | } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) { |
| 392 | type = AVMEDIA_TYPE_DATA; |
| 393 | } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) { |
| 394 | test_for_ext_stream_audio = 1; |
| 395 | type = AVMEDIA_TYPE_UNKNOWN; |
| 396 | } else { |
| 397 | return -1; |
| 398 | } |
| 399 | ff_get_guid(pb, &g); |
| 400 | avio_skip(pb, 8); /* total_size */ |
| 401 | type_specific_size = avio_rl32(pb); |
| 402 | avio_rl32(pb); |
| 403 | st->id = avio_rl16(pb) & 0x7f; /* stream id */ |
| 404 | // mapping of asf ID to AV stream ID; |
| 405 | asf->asfid2avid[st->id] = s->nb_streams - 1; |
| 406 | asf_st = &asf->streams[st->id]; |
| 407 | |
| 408 | avio_rl32(pb); |
| 409 | |
| 410 | if (test_for_ext_stream_audio) { |
| 411 | ff_get_guid(pb, &g); |
| 412 | if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) { |
| 413 | type = AVMEDIA_TYPE_AUDIO; |
| 414 | is_dvr_ms_audio = 1; |
| 415 | ff_get_guid(pb, &g); |
| 416 | avio_rl32(pb); |
| 417 | avio_rl32(pb); |
| 418 | avio_rl32(pb); |
| 419 | ff_get_guid(pb, &g); |
| 420 | avio_rl32(pb); |
| 421 | } |
| 422 | } |
| 423 | |
| 424 | st->codec->codec_type = type; |
| 425 | if (type == AVMEDIA_TYPE_AUDIO) { |
| 426 | int ret = ff_get_wav_header(pb, st->codec, type_specific_size); |
| 427 | if (ret < 0) |
| 428 | return ret; |
| 429 | if (is_dvr_ms_audio) { |
| 430 | // codec_id and codec_tag are unreliable in dvr_ms |
| 431 | // files. Set them later by probing stream. |
| 432 | st->request_probe = 1; |
| 433 | st->codec->codec_tag = 0; |
| 434 | } |
| 435 | if (st->codec->codec_id == AV_CODEC_ID_AAC) |
| 436 | st->need_parsing = AVSTREAM_PARSE_NONE; |
| 437 | else |
| 438 | st->need_parsing = AVSTREAM_PARSE_FULL; |
| 439 | /* We have to init the frame size at some point .... */ |
| 440 | pos2 = avio_tell(pb); |
| 441 | if (size >= (pos2 + 8 - pos1 + 24)) { |
| 442 | asf_st->ds_span = avio_r8(pb); |
| 443 | asf_st->ds_packet_size = avio_rl16(pb); |
| 444 | asf_st->ds_chunk_size = avio_rl16(pb); |
| 445 | avio_rl16(pb); // ds_data_size |
| 446 | avio_r8(pb); // ds_silence_data |
| 447 | } |
| 448 | if (asf_st->ds_span > 1) { |
| 449 | if (!asf_st->ds_chunk_size || |
| 450 | (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) || |
| 451 | asf_st->ds_packet_size % asf_st->ds_chunk_size) |
| 452 | asf_st->ds_span = 0; // disable descrambling |
| 453 | } |
| 454 | } else if (type == AVMEDIA_TYPE_VIDEO && |
| 455 | size - (avio_tell(pb) - pos1 + 24) >= 51) { |
| 456 | avio_rl32(pb); |
| 457 | avio_rl32(pb); |
| 458 | avio_r8(pb); |
| 459 | avio_rl16(pb); /* size */ |
| 460 | sizeX = avio_rl32(pb); /* size */ |
| 461 | st->codec->width = avio_rl32(pb); |
| 462 | st->codec->height = avio_rl32(pb); |
| 463 | /* not available for asf */ |
| 464 | avio_rl16(pb); /* panes */ |
| 465 | st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */ |
| 466 | tag1 = avio_rl32(pb); |
| 467 | avio_skip(pb, 20); |
| 468 | if (sizeX > 40) { |
| 469 | st->codec->extradata_size = ffio_limit(pb, sizeX - 40); |
| 470 | st->codec->extradata = av_mallocz(st->codec->extradata_size + |
| 471 | FF_INPUT_BUFFER_PADDING_SIZE); |
| 472 | if (!st->codec->extradata) |
| 473 | return AVERROR(ENOMEM); |
| 474 | avio_read(pb, st->codec->extradata, st->codec->extradata_size); |
| 475 | } |
| 476 | |
| 477 | /* Extract palette from extradata if bpp <= 8 */ |
| 478 | /* This code assumes that extradata contains only palette */ |
| 479 | /* This is true for all paletted codecs implemented in libavcodec */ |
| 480 | if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) { |
| 481 | #if HAVE_BIGENDIAN |
| 482 | int i; |
| 483 | for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE) / 4; i++) |
| 484 | asf_st->palette[i] = av_bswap32(((uint32_t *)st->codec->extradata)[i]); |
| 485 | #else |
| 486 | memcpy(asf_st->palette, st->codec->extradata, |
| 487 | FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)); |
| 488 | #endif |
| 489 | asf_st->palette_changed = 1; |
| 490 | } |
| 491 | |
| 492 | st->codec->codec_tag = tag1; |
| 493 | st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1); |
| 494 | if (tag1 == MKTAG('D', 'V', 'R', ' ')) { |
| 495 | st->need_parsing = AVSTREAM_PARSE_FULL; |
| 496 | /* issue658 contains wrong w/h and MS even puts a fake seq header |
| 497 | * with wrong w/h in extradata while a correct one is in the stream. |
| 498 | * maximum lameness */ |
| 499 | st->codec->width = |
| 500 | st->codec->height = 0; |
| 501 | av_freep(&st->codec->extradata); |
| 502 | st->codec->extradata_size = 0; |
| 503 | } |
| 504 | if (st->codec->codec_id == AV_CODEC_ID_H264) |
| 505 | st->need_parsing = AVSTREAM_PARSE_FULL_ONCE; |
| 506 | if (st->codec->codec_id == AV_CODEC_ID_MPEG4) |
| 507 | st->need_parsing = AVSTREAM_PARSE_FULL_ONCE; |
| 508 | } |
| 509 | pos2 = avio_tell(pb); |
| 510 | avio_skip(pb, size - (pos2 - pos1 + 24)); |
| 511 | |
| 512 | return 0; |
| 513 | } |
| 514 | |
| 515 | static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size) |
| 516 | { |
| 517 | ASFContext *asf = s->priv_data; |
| 518 | AVIOContext *pb = s->pb; |
| 519 | ff_asf_guid g; |
| 520 | int ext_len, payload_ext_ct, stream_ct, i; |
| 521 | uint32_t leak_rate, stream_num; |
| 522 | unsigned int stream_languageid_index; |
| 523 | |
| 524 | avio_rl64(pb); // starttime |
| 525 | avio_rl64(pb); // endtime |
| 526 | leak_rate = avio_rl32(pb); // leak-datarate |
| 527 | avio_rl32(pb); // bucket-datasize |
| 528 | avio_rl32(pb); // init-bucket-fullness |
| 529 | avio_rl32(pb); // alt-leak-datarate |
| 530 | avio_rl32(pb); // alt-bucket-datasize |
| 531 | avio_rl32(pb); // alt-init-bucket-fullness |
| 532 | avio_rl32(pb); // max-object-size |
| 533 | avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved) |
| 534 | stream_num = avio_rl16(pb); // stream-num |
| 535 | |
| 536 | stream_languageid_index = avio_rl16(pb); // stream-language-id-index |
| 537 | if (stream_num < 128) |
| 538 | asf->streams[stream_num].stream_language_index = stream_languageid_index; |
| 539 | |
| 540 | avio_rl64(pb); // avg frametime in 100ns units |
| 541 | stream_ct = avio_rl16(pb); // stream-name-count |
| 542 | payload_ext_ct = avio_rl16(pb); // payload-extension-system-count |
| 543 | |
| 544 | if (stream_num < 128) { |
| 545 | asf->stream_bitrates[stream_num] = leak_rate; |
| 546 | asf->streams[stream_num].payload_ext_ct = 0; |
| 547 | } |
| 548 | |
| 549 | for (i = 0; i < stream_ct; i++) { |
| 550 | avio_rl16(pb); |
| 551 | ext_len = avio_rl16(pb); |
| 552 | avio_skip(pb, ext_len); |
| 553 | } |
| 554 | |
| 555 | for (i = 0; i < payload_ext_ct; i++) { |
| 556 | int size; |
| 557 | ff_get_guid(pb, &g); |
| 558 | size = avio_rl16(pb); |
| 559 | ext_len = avio_rl32(pb); |
| 560 | avio_skip(pb, ext_len); |
| 561 | if (stream_num < 128 && i < FF_ARRAY_ELEMS(asf->streams[stream_num].payload)) { |
| 562 | ASFPayload *p = &asf->streams[stream_num].payload[i]; |
| 563 | p->type = g[0]; |
| 564 | p->size = size; |
| 565 | av_log(s, AV_LOG_DEBUG, "Payload extension %x %d\n", g[0], p->size ); |
| 566 | asf->streams[stream_num].payload_ext_ct ++; |
| 567 | } |
| 568 | } |
| 569 | |
| 570 | return 0; |
| 571 | } |
| 572 | |
| 573 | static int asf_read_content_desc(AVFormatContext *s, int64_t size) |
| 574 | { |
| 575 | AVIOContext *pb = s->pb; |
| 576 | int len1, len2, len3, len4, len5; |
| 577 | |
| 578 | len1 = avio_rl16(pb); |
| 579 | len2 = avio_rl16(pb); |
| 580 | len3 = avio_rl16(pb); |
| 581 | len4 = avio_rl16(pb); |
| 582 | len5 = avio_rl16(pb); |
| 583 | get_tag(s, "title", 0, len1, 32); |
| 584 | get_tag(s, "author", 0, len2, 32); |
| 585 | get_tag(s, "copyright", 0, len3, 32); |
| 586 | get_tag(s, "comment", 0, len4, 32); |
| 587 | avio_skip(pb, len5); |
| 588 | |
| 589 | return 0; |
| 590 | } |
| 591 | |
| 592 | static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size) |
| 593 | { |
| 594 | AVIOContext *pb = s->pb; |
| 595 | ASFContext *asf = s->priv_data; |
| 596 | int desc_count, i, ret; |
| 597 | |
| 598 | desc_count = avio_rl16(pb); |
| 599 | for (i = 0; i < desc_count; i++) { |
| 600 | int name_len, value_type, value_len; |
| 601 | char name[1024]; |
| 602 | |
| 603 | name_len = avio_rl16(pb); |
| 604 | if (name_len % 2) // must be even, broken lavf versions wrote len-1 |
| 605 | name_len += 1; |
| 606 | if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len) |
| 607 | avio_skip(pb, name_len - ret); |
| 608 | value_type = avio_rl16(pb); |
| 609 | value_len = avio_rl16(pb); |
| 610 | if (!value_type && value_len % 2) |
| 611 | value_len += 1; |
| 612 | /* My sample has that stream set to 0 maybe that mean the container. |
| 613 | * ASF stream count starts at 1. I am using 0 to the container value |
| 614 | * since it's unused. */ |
| 615 | if (!strcmp(name, "AspectRatioX")) |
| 616 | asf->dar[0].num = get_value(s->pb, value_type, 32); |
| 617 | else if (!strcmp(name, "AspectRatioY")) |
| 618 | asf->dar[0].den = get_value(s->pb, value_type, 32); |
| 619 | else |
| 620 | get_tag(s, name, value_type, value_len, 32); |
| 621 | } |
| 622 | |
| 623 | return 0; |
| 624 | } |
| 625 | |
| 626 | static int asf_read_language_list(AVFormatContext *s, int64_t size) |
| 627 | { |
| 628 | AVIOContext *pb = s->pb; |
| 629 | ASFContext *asf = s->priv_data; |
| 630 | int j, ret; |
| 631 | int stream_count = avio_rl16(pb); |
| 632 | for (j = 0; j < stream_count; j++) { |
| 633 | char lang[6]; |
| 634 | unsigned int lang_len = avio_r8(pb); |
| 635 | if ((ret = avio_get_str16le(pb, lang_len, lang, |
| 636 | sizeof(lang))) < lang_len) |
| 637 | avio_skip(pb, lang_len - ret); |
| 638 | if (j < 128) |
| 639 | av_strlcpy(asf->stream_languages[j], lang, |
| 640 | sizeof(*asf->stream_languages)); |
| 641 | } |
| 642 | |
| 643 | return 0; |
| 644 | } |
| 645 | |
| 646 | static int asf_read_metadata(AVFormatContext *s, int64_t size) |
| 647 | { |
| 648 | AVIOContext *pb = s->pb; |
| 649 | ASFContext *asf = s->priv_data; |
| 650 | int n, stream_num, name_len, value_len; |
| 651 | int ret, i; |
| 652 | n = avio_rl16(pb); |
| 653 | |
| 654 | for (i = 0; i < n; i++) { |
| 655 | char name[1024]; |
| 656 | int value_type; |
| 657 | |
| 658 | avio_rl16(pb); // lang_list_index |
| 659 | stream_num = avio_rl16(pb); |
| 660 | name_len = avio_rl16(pb); |
| 661 | value_type = avio_rl16(pb); /* value_type */ |
| 662 | value_len = avio_rl32(pb); |
| 663 | |
| 664 | if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len) |
| 665 | avio_skip(pb, name_len - ret); |
| 666 | av_dlog(s, "%d stream %d name_len %2d type %d len %4d <%s>\n", |
| 667 | i, stream_num, name_len, value_type, value_len, name); |
| 668 | |
| 669 | if (!strcmp(name, "AspectRatioX")){ |
| 670 | int aspect_x = get_value(s->pb, value_type, 16); |
| 671 | if(stream_num < 128) |
| 672 | asf->dar[stream_num].num = aspect_x; |
| 673 | } else if(!strcmp(name, "AspectRatioY")){ |
| 674 | int aspect_y = get_value(s->pb, value_type, 16); |
| 675 | if(stream_num < 128) |
| 676 | asf->dar[stream_num].den = aspect_y; |
| 677 | } else { |
| 678 | get_tag(s, name, value_type, value_len, 16); |
| 679 | } |
| 680 | } |
| 681 | |
| 682 | return 0; |
| 683 | } |
| 684 | |
| 685 | static int asf_read_marker(AVFormatContext *s, int64_t size) |
| 686 | { |
| 687 | AVIOContext *pb = s->pb; |
| 688 | ASFContext *asf = s->priv_data; |
| 689 | int i, count, name_len, ret; |
| 690 | char name[1024]; |
| 691 | |
| 692 | avio_rl64(pb); // reserved 16 bytes |
| 693 | avio_rl64(pb); // ... |
| 694 | count = avio_rl32(pb); // markers count |
| 695 | avio_rl16(pb); // reserved 2 bytes |
| 696 | name_len = avio_rl16(pb); // name length |
| 697 | for (i = 0; i < name_len; i++) |
| 698 | avio_r8(pb); // skip the name |
| 699 | |
| 700 | for (i = 0; i < count; i++) { |
| 701 | int64_t pres_time; |
| 702 | int name_len; |
| 703 | |
| 704 | avio_rl64(pb); // offset, 8 bytes |
| 705 | pres_time = avio_rl64(pb); // presentation time |
| 706 | pres_time -= asf->hdr.preroll * 10000; |
| 707 | avio_rl16(pb); // entry length |
| 708 | avio_rl32(pb); // send time |
| 709 | avio_rl32(pb); // flags |
| 710 | name_len = avio_rl32(pb); // name length |
| 711 | if ((ret = avio_get_str16le(pb, name_len * 2, name, |
| 712 | sizeof(name))) < name_len) |
| 713 | avio_skip(pb, name_len - ret); |
| 714 | avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time, |
| 715 | AV_NOPTS_VALUE, name); |
| 716 | } |
| 717 | |
| 718 | return 0; |
| 719 | } |
| 720 | |
| 721 | static int asf_read_header(AVFormatContext *s) |
| 722 | { |
| 723 | ASFContext *asf = s->priv_data; |
| 724 | ff_asf_guid g; |
| 725 | AVIOContext *pb = s->pb; |
| 726 | int i; |
| 727 | int64_t gsize; |
| 728 | |
| 729 | ff_get_guid(pb, &g); |
| 730 | if (ff_guidcmp(&g, &ff_asf_header)) |
| 731 | return AVERROR_INVALIDDATA; |
| 732 | avio_rl64(pb); |
| 733 | avio_rl32(pb); |
| 734 | avio_r8(pb); |
| 735 | avio_r8(pb); |
| 736 | memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid)); |
| 737 | |
| 738 | for (i = 0; i<128; i++) |
| 739 | asf->streams[i].stream_language_index = 128; // invalid stream index means no language info |
| 740 | |
| 741 | for (;;) { |
| 742 | uint64_t gpos = avio_tell(pb); |
| 743 | ff_get_guid(pb, &g); |
| 744 | gsize = avio_rl64(pb); |
| 745 | print_guid(&g); |
| 746 | if (!ff_guidcmp(&g, &ff_asf_data_header)) { |
| 747 | asf->data_object_offset = avio_tell(pb); |
| 748 | /* If not streaming, gsize is not unlimited (how?), |
| 749 | * and there is enough space in the file.. */ |
| 750 | if (!(asf->hdr.flags & 0x01) && gsize >= 100) |
| 751 | asf->data_object_size = gsize - 24; |
| 752 | else |
| 753 | asf->data_object_size = (uint64_t)-1; |
| 754 | break; |
| 755 | } |
| 756 | if (gsize < 24) |
| 757 | return AVERROR_INVALIDDATA; |
| 758 | if (!ff_guidcmp(&g, &ff_asf_file_header)) { |
| 759 | int ret = asf_read_file_properties(s, gsize); |
| 760 | if (ret < 0) |
| 761 | return ret; |
| 762 | } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) { |
| 763 | int ret = asf_read_stream_properties(s, gsize); |
| 764 | if (ret < 0) |
| 765 | return ret; |
| 766 | } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) { |
| 767 | asf_read_content_desc(s, gsize); |
| 768 | } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) { |
| 769 | asf_read_language_list(s, gsize); |
| 770 | } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) { |
| 771 | asf_read_ext_content_desc(s, gsize); |
| 772 | } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) { |
| 773 | asf_read_metadata(s, gsize); |
| 774 | } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) { |
| 775 | asf_read_metadata(s, gsize); |
| 776 | } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) { |
| 777 | asf_read_ext_stream_properties(s, gsize); |
| 778 | |
| 779 | // there could be a optional stream properties object to follow |
| 780 | // if so the next iteration will pick it up |
| 781 | continue; |
| 782 | } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) { |
| 783 | ff_get_guid(pb, &g); |
| 784 | avio_skip(pb, 6); |
| 785 | continue; |
| 786 | } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) { |
| 787 | asf_read_marker(s, gsize); |
| 788 | } else if (avio_feof(pb)) { |
| 789 | return AVERROR_EOF; |
| 790 | } else { |
| 791 | if (!s->keylen) { |
| 792 | if (!ff_guidcmp(&g, &ff_asf_content_encryption)) { |
| 793 | unsigned int len; |
| 794 | AVPacket pkt; |
| 795 | av_log(s, AV_LOG_WARNING, |
| 796 | "DRM protected stream detected, decoding will likely fail!\n"); |
| 797 | len= avio_rl32(pb); |
| 798 | av_log(s, AV_LOG_DEBUG, "Secret data:\n"); |
| 799 | av_get_packet(pb, &pkt, len); av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size); av_free_packet(&pkt); |
| 800 | len= avio_rl32(pb); |
| 801 | get_tag(s, "ASF_Protection_Type", -1, len, 32); |
| 802 | len= avio_rl32(pb); |
| 803 | get_tag(s, "ASF_Key_ID", -1, len, 32); |
| 804 | len= avio_rl32(pb); |
| 805 | get_tag(s, "ASF_License_URL", -1, len, 32); |
| 806 | } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) { |
| 807 | av_log(s, AV_LOG_WARNING, |
| 808 | "Ext DRM protected stream detected, decoding will likely fail!\n"); |
| 809 | av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0); |
| 810 | } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) { |
| 811 | av_log(s, AV_LOG_INFO, "Digital signature detected!\n"); |
| 812 | } |
| 813 | } |
| 814 | } |
| 815 | if (avio_tell(pb) != gpos + gsize) |
| 816 | av_log(s, AV_LOG_DEBUG, |
| 817 | "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n", |
| 818 | avio_tell(pb) - gpos, gsize); |
| 819 | avio_seek(pb, gpos + gsize, SEEK_SET); |
| 820 | } |
| 821 | ff_get_guid(pb, &g); |
| 822 | avio_rl64(pb); |
| 823 | avio_r8(pb); |
| 824 | avio_r8(pb); |
| 825 | if (avio_feof(pb)) |
| 826 | return AVERROR_EOF; |
| 827 | asf->data_offset = avio_tell(pb); |
| 828 | asf->packet_size_left = 0; |
| 829 | |
| 830 | for (i = 0; i < 128; i++) { |
| 831 | int stream_num = asf->asfid2avid[i]; |
| 832 | if (stream_num >= 0) { |
| 833 | AVStream *st = s->streams[stream_num]; |
| 834 | if (!st->codec->bit_rate) |
| 835 | st->codec->bit_rate = asf->stream_bitrates[i]; |
| 836 | if (asf->dar[i].num > 0 && asf->dar[i].den > 0) { |
| 837 | av_reduce(&st->sample_aspect_ratio.num, |
| 838 | &st->sample_aspect_ratio.den, |
| 839 | asf->dar[i].num, asf->dar[i].den, INT_MAX); |
| 840 | } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) && |
| 841 | // Use ASF container value if the stream doesn't set AR. |
| 842 | (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)) |
| 843 | av_reduce(&st->sample_aspect_ratio.num, |
| 844 | &st->sample_aspect_ratio.den, |
| 845 | asf->dar[0].num, asf->dar[0].den, INT_MAX); |
| 846 | |
| 847 | av_dlog(s, "i=%d, st->codec->codec_type:%d, asf->dar %d:%d sar=%d:%d\n", |
| 848 | i, st->codec->codec_type, asf->dar[i].num, asf->dar[i].den, |
| 849 | st->sample_aspect_ratio.num, st->sample_aspect_ratio.den); |
| 850 | |
| 851 | // copy and convert language codes to the frontend |
| 852 | if (asf->streams[i].stream_language_index < 128) { |
| 853 | const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index]; |
| 854 | if (rfc1766 && strlen(rfc1766) > 1) { |
| 855 | const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any |
| 856 | const char *iso6392 = av_convert_lang_to(primary_tag, |
| 857 | AV_LANG_ISO639_2_BIBL); |
| 858 | if (iso6392) |
| 859 | av_dict_set(&st->metadata, "language", iso6392, 0); |
| 860 | } |
| 861 | } |
| 862 | } |
| 863 | } |
| 864 | |
| 865 | ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv); |
| 866 | |
| 867 | return 0; |
| 868 | } |
| 869 | |
| 870 | #define DO_2BITS(bits, var, defval) \ |
| 871 | switch (bits & 3) { \ |
| 872 | case 3: \ |
| 873 | var = avio_rl32(pb); \ |
| 874 | rsize += 4; \ |
| 875 | break; \ |
| 876 | case 2: \ |
| 877 | var = avio_rl16(pb); \ |
| 878 | rsize += 2; \ |
| 879 | break; \ |
| 880 | case 1: \ |
| 881 | var = avio_r8(pb); \ |
| 882 | rsize++; \ |
| 883 | break; \ |
| 884 | default: \ |
| 885 | var = defval; \ |
| 886 | break; \ |
| 887 | } |
| 888 | |
| 889 | /** |
| 890 | * Load a single ASF packet into the demuxer. |
| 891 | * @param s demux context |
| 892 | * @param pb context to read data from |
| 893 | * @return 0 on success, <0 on error |
| 894 | */ |
| 895 | static int asf_get_packet(AVFormatContext *s, AVIOContext *pb) |
| 896 | { |
| 897 | ASFContext *asf = s->priv_data; |
| 898 | uint32_t packet_length, padsize; |
| 899 | int rsize = 8; |
| 900 | int c, d, e, off; |
| 901 | |
| 902 | // if we do not know packet size, allow skipping up to 32 kB |
| 903 | off = 32768; |
| 904 | if (asf->no_resync_search) |
| 905 | off = 3; |
| 906 | else if (s->packet_size > 0) |
| 907 | off = (avio_tell(pb) - s->data_offset) % s->packet_size + 3; |
| 908 | |
| 909 | c = d = e = -1; |
| 910 | while (off-- > 0) { |
| 911 | c = d; |
| 912 | d = e; |
| 913 | e = avio_r8(pb); |
| 914 | if (c == 0x82 && !d && !e) |
| 915 | break; |
| 916 | } |
| 917 | |
| 918 | if (c != 0x82) { |
| 919 | /* This code allows handling of -EAGAIN at packet boundaries (i.e. |
| 920 | * if the packet sync code above triggers -EAGAIN). This does not |
| 921 | * imply complete -EAGAIN handling support at random positions in |
| 922 | * the stream. */ |
| 923 | if (pb->error == AVERROR(EAGAIN)) |
| 924 | return AVERROR(EAGAIN); |
| 925 | if (!avio_feof(pb)) |
| 926 | av_log(s, AV_LOG_ERROR, |
| 927 | "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb)); |
| 928 | } |
| 929 | if ((c & 0x8f) == 0x82) { |
| 930 | if (d || e) { |
| 931 | if (!avio_feof(pb)) |
| 932 | av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n"); |
| 933 | return AVERROR_INVALIDDATA; |
| 934 | } |
| 935 | c = avio_r8(pb); |
| 936 | d = avio_r8(pb); |
| 937 | rsize += 3; |
| 938 | } else if(!avio_feof(pb)) { |
| 939 | avio_seek(pb, -1, SEEK_CUR); // FIXME |
| 940 | } |
| 941 | |
| 942 | asf->packet_flags = c; |
| 943 | asf->packet_property = d; |
| 944 | |
| 945 | DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size); |
| 946 | DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored |
| 947 | DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length |
| 948 | |
| 949 | // the following checks prevent overflows and infinite loops |
| 950 | if (!packet_length || packet_length >= (1U << 29)) { |
| 951 | av_log(s, AV_LOG_ERROR, |
| 952 | "invalid packet_length %"PRIu32" at:%"PRId64"\n", |
| 953 | packet_length, avio_tell(pb)); |
| 954 | return AVERROR_INVALIDDATA; |
| 955 | } |
| 956 | if (padsize >= packet_length) { |
| 957 | av_log(s, AV_LOG_ERROR, |
| 958 | "invalid padsize %"PRIu32" at:%"PRId64"\n", padsize, avio_tell(pb)); |
| 959 | return AVERROR_INVALIDDATA; |
| 960 | } |
| 961 | |
| 962 | asf->packet_timestamp = avio_rl32(pb); |
| 963 | avio_rl16(pb); /* duration */ |
| 964 | // rsize has at least 11 bytes which have to be present |
| 965 | |
| 966 | if (asf->packet_flags & 0x01) { |
| 967 | asf->packet_segsizetype = avio_r8(pb); |
| 968 | rsize++; |
| 969 | asf->packet_segments = asf->packet_segsizetype & 0x3f; |
| 970 | } else { |
| 971 | asf->packet_segments = 1; |
| 972 | asf->packet_segsizetype = 0x80; |
| 973 | } |
| 974 | if (rsize > packet_length - padsize) { |
| 975 | asf->packet_size_left = 0; |
| 976 | av_log(s, AV_LOG_ERROR, |
| 977 | "invalid packet header length %d for pktlen %"PRIu32"-%"PRIu32" at %"PRId64"\n", |
| 978 | rsize, packet_length, padsize, avio_tell(pb)); |
| 979 | return AVERROR_INVALIDDATA; |
| 980 | } |
| 981 | asf->packet_size_left = packet_length - padsize - rsize; |
| 982 | if (packet_length < asf->hdr.min_pktsize) |
| 983 | padsize += asf->hdr.min_pktsize - packet_length; |
| 984 | asf->packet_padsize = padsize; |
| 985 | av_dlog(s, "packet: size=%d padsize=%d left=%d\n", |
| 986 | s->packet_size, asf->packet_padsize, asf->packet_size_left); |
| 987 | return 0; |
| 988 | } |
| 989 | |
| 990 | /** |
| 991 | * |
| 992 | * @return <0 if error |
| 993 | */ |
| 994 | static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb) |
| 995 | { |
| 996 | ASFContext *asf = s->priv_data; |
| 997 | ASFStream *asfst; |
| 998 | int rsize = 1; |
| 999 | int num = avio_r8(pb); |
| 1000 | int i; |
| 1001 | int64_t ts0, ts1 av_unused; |
| 1002 | |
| 1003 | asf->packet_segments--; |
| 1004 | asf->packet_key_frame = num >> 7; |
| 1005 | asf->stream_index = asf->asfid2avid[num & 0x7f]; |
| 1006 | asfst = &asf->streams[num & 0x7f]; |
| 1007 | // sequence should be ignored! |
| 1008 | DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0); |
| 1009 | DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0); |
| 1010 | DO_2BITS(asf->packet_property, asf->packet_replic_size, 0); |
| 1011 | av_dlog(asf, "key:%d stream:%d seq:%d offset:%d replic_size:%d\n", |
| 1012 | asf->packet_key_frame, asf->stream_index, asf->packet_seq, |
| 1013 | asf->packet_frag_offset, asf->packet_replic_size); |
| 1014 | if (rsize+(int64_t)asf->packet_replic_size > asf->packet_size_left) { |
| 1015 | av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size); |
| 1016 | return AVERROR_INVALIDDATA; |
| 1017 | } |
| 1018 | if (asf->packet_replic_size >= 8) { |
| 1019 | int64_t end = avio_tell(pb) + asf->packet_replic_size; |
| 1020 | AVRational aspect; |
| 1021 | asfst->packet_obj_size = avio_rl32(pb); |
| 1022 | if (asfst->packet_obj_size >= (1 << 24) || asfst->packet_obj_size <= 0) { |
| 1023 | av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n"); |
| 1024 | asfst->packet_obj_size = 0; |
| 1025 | return AVERROR_INVALIDDATA; |
| 1026 | } |
| 1027 | asf->packet_frag_timestamp = avio_rl32(pb); // timestamp |
| 1028 | |
| 1029 | for (i = 0; i < asfst->payload_ext_ct; i++) { |
| 1030 | ASFPayload *p = &asfst->payload[i]; |
| 1031 | int size = p->size; |
| 1032 | int64_t payend; |
| 1033 | if (size == 0xFFFF) |
| 1034 | size = avio_rl16(pb); |
| 1035 | payend = avio_tell(pb) + size; |
| 1036 | if (payend > end) { |
| 1037 | av_log(s, AV_LOG_ERROR, "too long payload\n"); |
| 1038 | break; |
| 1039 | } |
| 1040 | switch (p->type) { |
| 1041 | case 0x50: |
| 1042 | // duration = avio_rl16(pb); |
| 1043 | break; |
| 1044 | case 0x54: |
| 1045 | aspect.num = avio_r8(pb); |
| 1046 | aspect.den = avio_r8(pb); |
| 1047 | if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) { |
| 1048 | s->streams[asf->stream_index]->sample_aspect_ratio = aspect; |
| 1049 | } |
| 1050 | break; |
| 1051 | case 0x2A: |
| 1052 | avio_skip(pb, 8); |
| 1053 | ts0 = avio_rl64(pb); |
| 1054 | ts1 = avio_rl64(pb); |
| 1055 | if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000; |
| 1056 | else asf->packet_frag_timestamp = AV_NOPTS_VALUE; |
| 1057 | asf->ts_is_pts = 1; |
| 1058 | break; |
| 1059 | case 0x5B: |
| 1060 | case 0xB7: |
| 1061 | case 0xCC: |
| 1062 | case 0xC0: |
| 1063 | case 0xA0: |
| 1064 | //unknown |
| 1065 | break; |
| 1066 | } |
| 1067 | avio_seek(pb, payend, SEEK_SET); |
| 1068 | } |
| 1069 | |
| 1070 | avio_seek(pb, end, SEEK_SET); |
| 1071 | rsize += asf->packet_replic_size; // FIXME - check validity |
| 1072 | } else if (asf->packet_replic_size == 1) { |
| 1073 | // multipacket - frag_offset is beginning timestamp |
| 1074 | asf->packet_time_start = asf->packet_frag_offset; |
| 1075 | asf->packet_frag_offset = 0; |
| 1076 | asf->packet_frag_timestamp = asf->packet_timestamp; |
| 1077 | |
| 1078 | asf->packet_time_delta = avio_r8(pb); |
| 1079 | rsize++; |
| 1080 | } else if (asf->packet_replic_size != 0) { |
| 1081 | av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", |
| 1082 | asf->packet_replic_size); |
| 1083 | return AVERROR_INVALIDDATA; |
| 1084 | } |
| 1085 | if (asf->packet_flags & 0x01) { |
| 1086 | DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal |
| 1087 | if (rsize > asf->packet_size_left) { |
| 1088 | av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n"); |
| 1089 | return AVERROR_INVALIDDATA; |
| 1090 | } else if (asf->packet_frag_size > asf->packet_size_left - rsize) { |
| 1091 | if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) { |
| 1092 | av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n", |
| 1093 | asf->packet_size_left, rsize); |
| 1094 | return AVERROR_INVALIDDATA; |
| 1095 | } else { |
| 1096 | int diff = asf->packet_frag_size - (asf->packet_size_left - rsize); |
| 1097 | asf->packet_size_left += diff; |
| 1098 | asf->packet_padsize -= diff; |
| 1099 | } |
| 1100 | } |
| 1101 | } else { |
| 1102 | asf->packet_frag_size = asf->packet_size_left - rsize; |
| 1103 | } |
| 1104 | if (asf->packet_replic_size == 1) { |
| 1105 | asf->packet_multi_size = asf->packet_frag_size; |
| 1106 | if (asf->packet_multi_size > asf->packet_size_left) |
| 1107 | return AVERROR_INVALIDDATA; |
| 1108 | } |
| 1109 | asf->packet_size_left -= rsize; |
| 1110 | |
| 1111 | return 0; |
| 1112 | } |
| 1113 | |
| 1114 | /** |
| 1115 | * Parse data from individual ASF packets (which were previously loaded |
| 1116 | * with asf_get_packet()). |
| 1117 | * @param s demux context |
| 1118 | * @param pb context to read data from |
| 1119 | * @param pkt pointer to store packet data into |
| 1120 | * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF |
| 1121 | * packets need to be loaded (through asf_get_packet()) |
| 1122 | */ |
| 1123 | static int asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt) |
| 1124 | { |
| 1125 | ASFContext *asf = s->priv_data; |
| 1126 | ASFStream *asf_st = 0; |
| 1127 | for (;;) { |
| 1128 | int ret; |
| 1129 | if (avio_feof(pb)) |
| 1130 | return AVERROR_EOF; |
| 1131 | if (asf->packet_size_left < FRAME_HEADER_SIZE || |
| 1132 | asf->packet_segments < 1 && asf->packet_time_start == 0) { |
| 1133 | int ret = asf->packet_size_left + asf->packet_padsize; |
| 1134 | |
| 1135 | assert(ret >= 0); |
| 1136 | /* fail safe */ |
| 1137 | avio_skip(pb, ret); |
| 1138 | |
| 1139 | asf->packet_pos = avio_tell(pb); |
| 1140 | if (asf->data_object_size != (uint64_t)-1 && |
| 1141 | (asf->packet_pos - asf->data_object_offset >= asf->data_object_size)) |
| 1142 | return AVERROR_EOF; /* Do not exceed the size of the data object */ |
| 1143 | return 1; |
| 1144 | } |
| 1145 | if (asf->packet_time_start == 0) { |
| 1146 | if (asf_read_frame_header(s, pb) < 0) { |
| 1147 | asf->packet_time_start = asf->packet_segments = 0; |
| 1148 | continue; |
| 1149 | } |
| 1150 | if (asf->stream_index < 0 || |
| 1151 | s->streams[asf->stream_index]->discard >= AVDISCARD_ALL || |
| 1152 | (!asf->packet_key_frame && |
| 1153 | (s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY || asf->streams[s->streams[asf->stream_index]->id].skip_to_key))) { |
| 1154 | asf->packet_time_start = 0; |
| 1155 | /* unhandled packet (should not happen) */ |
| 1156 | avio_skip(pb, asf->packet_frag_size); |
| 1157 | asf->packet_size_left -= asf->packet_frag_size; |
| 1158 | if (asf->stream_index < 0) |
| 1159 | av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", |
| 1160 | asf->packet_frag_size); |
| 1161 | continue; |
| 1162 | } |
| 1163 | asf->asf_st = &asf->streams[s->streams[asf->stream_index]->id]; |
| 1164 | asf->asf_st->skip_to_key = 0; |
| 1165 | } |
| 1166 | asf_st = asf->asf_st; |
| 1167 | av_assert0(asf_st); |
| 1168 | |
| 1169 | if (!asf_st->frag_offset && asf->packet_frag_offset) { |
| 1170 | av_dlog(s, "skipping asf data pkt with fragment offset for " |
| 1171 | "stream:%d, expected:%d but got %d from pkt)\n", |
| 1172 | asf->stream_index, asf_st->frag_offset, |
| 1173 | asf->packet_frag_offset); |
| 1174 | avio_skip(pb, asf->packet_frag_size); |
| 1175 | asf->packet_size_left -= asf->packet_frag_size; |
| 1176 | continue; |
| 1177 | } |
| 1178 | |
| 1179 | if (asf->packet_replic_size == 1) { |
| 1180 | // frag_offset is here used as the beginning timestamp |
| 1181 | asf->packet_frag_timestamp = asf->packet_time_start; |
| 1182 | asf->packet_time_start += asf->packet_time_delta; |
| 1183 | asf_st->packet_obj_size = asf->packet_frag_size = avio_r8(pb); |
| 1184 | asf->packet_size_left--; |
| 1185 | asf->packet_multi_size--; |
| 1186 | if (asf->packet_multi_size < asf_st->packet_obj_size) { |
| 1187 | asf->packet_time_start = 0; |
| 1188 | avio_skip(pb, asf->packet_multi_size); |
| 1189 | asf->packet_size_left -= asf->packet_multi_size; |
| 1190 | continue; |
| 1191 | } |
| 1192 | asf->packet_multi_size -= asf_st->packet_obj_size; |
| 1193 | } |
| 1194 | |
| 1195 | if (asf_st->pkt.size != asf_st->packet_obj_size || |
| 1196 | // FIXME is this condition sufficient? |
| 1197 | asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { |
| 1198 | int ret; |
| 1199 | |
| 1200 | if (asf_st->pkt.data) { |
| 1201 | av_log(s, AV_LOG_INFO, |
| 1202 | "freeing incomplete packet size %d, new %d\n", |
| 1203 | asf_st->pkt.size, asf_st->packet_obj_size); |
| 1204 | asf_st->frag_offset = 0; |
| 1205 | av_free_packet(&asf_st->pkt); |
| 1206 | } |
| 1207 | /* new packet */ |
| 1208 | if ((ret = av_new_packet(&asf_st->pkt, asf_st->packet_obj_size)) < 0) |
| 1209 | return ret; |
| 1210 | asf_st->seq = asf->packet_seq; |
| 1211 | if (asf->ts_is_pts) { |
| 1212 | asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll; |
| 1213 | } else |
| 1214 | asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll; |
| 1215 | asf_st->pkt.stream_index = asf->stream_index; |
| 1216 | asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos; |
| 1217 | asf_st->pkt_clean = 0; |
| 1218 | |
| 1219 | if (asf_st->pkt.data && asf_st->palette_changed) { |
| 1220 | uint8_t *pal; |
| 1221 | pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE, |
| 1222 | AVPALETTE_SIZE); |
| 1223 | if (!pal) { |
| 1224 | av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n"); |
| 1225 | } else { |
| 1226 | memcpy(pal, asf_st->palette, AVPALETTE_SIZE); |
| 1227 | asf_st->palette_changed = 0; |
| 1228 | } |
| 1229 | } |
| 1230 | av_dlog(asf, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n", |
| 1231 | asf->stream_index, asf->packet_key_frame, |
| 1232 | asf_st->pkt.flags & AV_PKT_FLAG_KEY, |
| 1233 | s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, |
| 1234 | asf_st->packet_obj_size); |
| 1235 | if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO) |
| 1236 | asf->packet_key_frame = 1; |
| 1237 | if (asf->packet_key_frame) |
| 1238 | asf_st->pkt.flags |= AV_PKT_FLAG_KEY; |
| 1239 | } |
| 1240 | |
| 1241 | /* read data */ |
| 1242 | av_dlog(asf, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n", |
| 1243 | s->packet_size, asf_st->pkt.size, asf->packet_frag_offset, |
| 1244 | asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data); |
| 1245 | asf->packet_size_left -= asf->packet_frag_size; |
| 1246 | if (asf->packet_size_left < 0) |
| 1247 | continue; |
| 1248 | |
| 1249 | if (asf->packet_frag_offset >= asf_st->pkt.size || |
| 1250 | asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) { |
| 1251 | av_log(s, AV_LOG_ERROR, |
| 1252 | "packet fragment position invalid %u,%u not in %u\n", |
| 1253 | asf->packet_frag_offset, asf->packet_frag_size, |
| 1254 | asf_st->pkt.size); |
| 1255 | continue; |
| 1256 | } |
| 1257 | |
| 1258 | if (asf->packet_frag_offset != asf_st->frag_offset && !asf_st->pkt_clean) { |
| 1259 | memset(asf_st->pkt.data + asf_st->frag_offset, 0, asf_st->pkt.size - asf_st->frag_offset); |
| 1260 | asf_st->pkt_clean = 1; |
| 1261 | } |
| 1262 | |
| 1263 | ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset, |
| 1264 | asf->packet_frag_size); |
| 1265 | if (ret != asf->packet_frag_size) { |
| 1266 | if (ret < 0 || asf->packet_frag_offset + ret == 0) |
| 1267 | return ret < 0 ? ret : AVERROR_EOF; |
| 1268 | |
| 1269 | if (asf_st->ds_span > 1) { |
| 1270 | // scrambling, we can either drop it completely or fill the remainder |
| 1271 | // TODO: should we fill the whole packet instead of just the current |
| 1272 | // fragment? |
| 1273 | memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0, |
| 1274 | asf->packet_frag_size - ret); |
| 1275 | ret = asf->packet_frag_size; |
| 1276 | } else { |
| 1277 | // no scrambling, so we can return partial packets |
| 1278 | av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret); |
| 1279 | } |
| 1280 | } |
| 1281 | if (s->key && s->keylen == 20) |
| 1282 | ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset, |
| 1283 | ret); |
| 1284 | asf_st->frag_offset += ret; |
| 1285 | /* test if whole packet is read */ |
| 1286 | if (asf_st->frag_offset == asf_st->pkt.size) { |
| 1287 | // workaround for macroshit radio DVR-MS files |
| 1288 | if (s->streams[asf->stream_index]->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO && |
| 1289 | asf_st->pkt.size > 100) { |
| 1290 | int i; |
| 1291 | for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++) |
| 1292 | ; |
| 1293 | if (i == asf_st->pkt.size) { |
| 1294 | av_log(s, AV_LOG_DEBUG, "discarding ms fart\n"); |
| 1295 | asf_st->frag_offset = 0; |
| 1296 | av_free_packet(&asf_st->pkt); |
| 1297 | continue; |
| 1298 | } |
| 1299 | } |
| 1300 | |
| 1301 | /* return packet */ |
| 1302 | if (asf_st->ds_span > 1) { |
| 1303 | if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) { |
| 1304 | av_log(s, AV_LOG_ERROR, |
| 1305 | "pkt.size != ds_packet_size * ds_span (%d %d %d)\n", |
| 1306 | asf_st->pkt.size, asf_st->ds_packet_size, |
| 1307 | asf_st->ds_span); |
| 1308 | } else { |
| 1309 | /* packet descrambling */ |
| 1310 | AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size + |
| 1311 | FF_INPUT_BUFFER_PADDING_SIZE); |
| 1312 | if (buf) { |
| 1313 | uint8_t *newdata = buf->data; |
| 1314 | int offset = 0; |
| 1315 | memset(newdata + asf_st->pkt.size, 0, |
| 1316 | FF_INPUT_BUFFER_PADDING_SIZE); |
| 1317 | while (offset < asf_st->pkt.size) { |
| 1318 | int off = offset / asf_st->ds_chunk_size; |
| 1319 | int row = off / asf_st->ds_span; |
| 1320 | int col = off % asf_st->ds_span; |
| 1321 | int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size; |
| 1322 | assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size); |
| 1323 | assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size); |
| 1324 | memcpy(newdata + offset, |
| 1325 | asf_st->pkt.data + idx * asf_st->ds_chunk_size, |
| 1326 | asf_st->ds_chunk_size); |
| 1327 | offset += asf_st->ds_chunk_size; |
| 1328 | } |
| 1329 | av_buffer_unref(&asf_st->pkt.buf); |
| 1330 | asf_st->pkt.buf = buf; |
| 1331 | asf_st->pkt.data = buf->data; |
| 1332 | } |
| 1333 | } |
| 1334 | } |
| 1335 | asf_st->frag_offset = 0; |
| 1336 | *pkt = asf_st->pkt; |
| 1337 | #if FF_API_DESTRUCT_PACKET |
| 1338 | FF_DISABLE_DEPRECATION_WARNINGS |
| 1339 | asf_st->pkt.destruct = NULL; |
| 1340 | FF_ENABLE_DEPRECATION_WARNINGS |
| 1341 | #endif |
| 1342 | asf_st->pkt.buf = 0; |
| 1343 | asf_st->pkt.size = 0; |
| 1344 | asf_st->pkt.data = 0; |
| 1345 | asf_st->pkt.side_data_elems = 0; |
| 1346 | asf_st->pkt.side_data = NULL; |
| 1347 | break; // packet completed |
| 1348 | } |
| 1349 | } |
| 1350 | return 0; |
| 1351 | } |
| 1352 | |
| 1353 | static int asf_read_packet(AVFormatContext *s, AVPacket *pkt) |
| 1354 | { |
| 1355 | ASFContext *asf = s->priv_data; |
| 1356 | |
| 1357 | for (;;) { |
| 1358 | int ret; |
| 1359 | |
| 1360 | /* parse cached packets, if any */ |
| 1361 | if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0) |
| 1362 | return ret; |
| 1363 | if ((ret = asf_get_packet(s, s->pb)) < 0) |
| 1364 | assert(asf->packet_size_left < FRAME_HEADER_SIZE || |
| 1365 | asf->packet_segments < 1); |
| 1366 | asf->packet_time_start = 0; |
| 1367 | } |
| 1368 | } |
| 1369 | |
| 1370 | // Added to support seeking after packets have been read |
| 1371 | // If information is not reset, read_packet fails due to |
| 1372 | // leftover information from previous reads |
| 1373 | static void asf_reset_header(AVFormatContext *s) |
| 1374 | { |
| 1375 | ASFContext *asf = s->priv_data; |
| 1376 | ASFStream *asf_st; |
| 1377 | int i; |
| 1378 | |
| 1379 | asf->packet_size_left = 0; |
| 1380 | asf->packet_flags = 0; |
| 1381 | asf->packet_property = 0; |
| 1382 | asf->packet_timestamp = 0; |
| 1383 | asf->packet_segsizetype = 0; |
| 1384 | asf->packet_segments = 0; |
| 1385 | asf->packet_seq = 0; |
| 1386 | asf->packet_replic_size = 0; |
| 1387 | asf->packet_key_frame = 0; |
| 1388 | asf->packet_padsize = 0; |
| 1389 | asf->packet_frag_offset = 0; |
| 1390 | asf->packet_frag_size = 0; |
| 1391 | asf->packet_frag_timestamp = 0; |
| 1392 | asf->packet_multi_size = 0; |
| 1393 | asf->packet_time_delta = 0; |
| 1394 | asf->packet_time_start = 0; |
| 1395 | |
| 1396 | for (i = 0; i < 128; i++) { |
| 1397 | asf_st = &asf->streams[i]; |
| 1398 | av_free_packet(&asf_st->pkt); |
| 1399 | asf_st->packet_obj_size = 0; |
| 1400 | asf_st->frag_offset = 0; |
| 1401 | asf_st->seq = 0; |
| 1402 | } |
| 1403 | asf->asf_st = NULL; |
| 1404 | } |
| 1405 | |
| 1406 | static void skip_to_key(AVFormatContext *s) |
| 1407 | { |
| 1408 | ASFContext *asf = s->priv_data; |
| 1409 | int i; |
| 1410 | |
| 1411 | for (i = 0; i < 128; i++) { |
| 1412 | int j = asf->asfid2avid[i]; |
| 1413 | ASFStream *asf_st = &asf->streams[i]; |
| 1414 | if (j < 0 || s->streams[j]->codec->codec_type != AVMEDIA_TYPE_VIDEO) |
| 1415 | continue; |
| 1416 | |
| 1417 | asf_st->skip_to_key = 1; |
| 1418 | } |
| 1419 | } |
| 1420 | |
| 1421 | static int asf_read_close(AVFormatContext *s) |
| 1422 | { |
| 1423 | asf_reset_header(s); |
| 1424 | |
| 1425 | return 0; |
| 1426 | } |
| 1427 | |
| 1428 | static int64_t asf_read_pts(AVFormatContext *s, int stream_index, |
| 1429 | int64_t *ppos, int64_t pos_limit) |
| 1430 | { |
| 1431 | ASFContext *asf = s->priv_data; |
| 1432 | AVPacket pkt1, *pkt = &pkt1; |
| 1433 | ASFStream *asf_st; |
| 1434 | int64_t pts; |
| 1435 | int64_t pos = *ppos; |
| 1436 | int i; |
| 1437 | int64_t start_pos[ASF_MAX_STREAMS]; |
| 1438 | |
| 1439 | for (i = 0; i < s->nb_streams; i++) |
| 1440 | start_pos[i] = pos; |
| 1441 | |
| 1442 | if (s->packet_size > 0) |
| 1443 | pos = (pos + s->packet_size - 1 - s->data_offset) / |
| 1444 | s->packet_size * s->packet_size + |
| 1445 | s->data_offset; |
| 1446 | *ppos = pos; |
| 1447 | if (avio_seek(s->pb, pos, SEEK_SET) < 0) |
| 1448 | return AV_NOPTS_VALUE; |
| 1449 | |
| 1450 | ff_read_frame_flush(s); |
| 1451 | asf_reset_header(s); |
| 1452 | for (;;) { |
| 1453 | if (av_read_frame(s, pkt) < 0) { |
| 1454 | av_log(s, AV_LOG_INFO, "asf_read_pts failed\n"); |
| 1455 | return AV_NOPTS_VALUE; |
| 1456 | } |
| 1457 | |
| 1458 | pts = pkt->dts; |
| 1459 | |
| 1460 | av_free_packet(pkt); |
| 1461 | if (pkt->flags & AV_PKT_FLAG_KEY) { |
| 1462 | i = pkt->stream_index; |
| 1463 | |
| 1464 | asf_st = &asf->streams[s->streams[i]->id]; |
| 1465 | |
| 1466 | // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0); |
| 1467 | pos = asf_st->packet_pos; |
| 1468 | |
| 1469 | av_add_index_entry(s->streams[i], pos, pts, pkt->size, |
| 1470 | pos - start_pos[i] + 1, AVINDEX_KEYFRAME); |
| 1471 | start_pos[i] = asf_st->packet_pos + 1; |
| 1472 | |
| 1473 | if (pkt->stream_index == stream_index) |
| 1474 | break; |
| 1475 | } |
| 1476 | } |
| 1477 | |
| 1478 | *ppos = pos; |
| 1479 | return pts; |
| 1480 | } |
| 1481 | |
| 1482 | static int asf_build_simple_index(AVFormatContext *s, int stream_index) |
| 1483 | { |
| 1484 | ff_asf_guid g; |
| 1485 | ASFContext *asf = s->priv_data; |
| 1486 | int64_t current_pos = avio_tell(s->pb); |
| 1487 | int ret = 0; |
| 1488 | |
| 1489 | if((ret = avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET)) < 0) { |
| 1490 | return ret; |
| 1491 | } |
| 1492 | |
| 1493 | if ((ret = ff_get_guid(s->pb, &g)) < 0) |
| 1494 | goto end; |
| 1495 | |
| 1496 | /* the data object can be followed by other top-level objects, |
| 1497 | * skip them until the simple index object is reached */ |
| 1498 | while (ff_guidcmp(&g, &ff_asf_simple_index_header)) { |
| 1499 | int64_t gsize = avio_rl64(s->pb); |
| 1500 | if (gsize < 24 || avio_feof(s->pb)) { |
| 1501 | goto end; |
| 1502 | } |
| 1503 | avio_skip(s->pb, gsize - 24); |
| 1504 | if ((ret = ff_get_guid(s->pb, &g)) < 0) |
| 1505 | goto end; |
| 1506 | } |
| 1507 | |
| 1508 | { |
| 1509 | int64_t itime, last_pos = -1; |
| 1510 | int pct, ict; |
| 1511 | int i; |
| 1512 | int64_t av_unused gsize = avio_rl64(s->pb); |
| 1513 | if ((ret = ff_get_guid(s->pb, &g)) < 0) |
| 1514 | goto end; |
| 1515 | itime = avio_rl64(s->pb); |
| 1516 | pct = avio_rl32(s->pb); |
| 1517 | ict = avio_rl32(s->pb); |
| 1518 | av_log(s, AV_LOG_DEBUG, |
| 1519 | "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict); |
| 1520 | |
| 1521 | for (i = 0; i < ict; i++) { |
| 1522 | int pktnum = avio_rl32(s->pb); |
| 1523 | int pktct = avio_rl16(s->pb); |
| 1524 | int64_t pos = s->data_offset + s->packet_size * (int64_t)pktnum; |
| 1525 | int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0); |
| 1526 | |
| 1527 | if (pos != last_pos) { |
| 1528 | av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n", |
| 1529 | pktnum, pktct, index_pts); |
| 1530 | av_add_index_entry(s->streams[stream_index], pos, index_pts, |
| 1531 | s->packet_size, 0, AVINDEX_KEYFRAME); |
| 1532 | last_pos = pos; |
| 1533 | } |
| 1534 | } |
| 1535 | asf->index_read = ict > 1; |
| 1536 | } |
| 1537 | end: |
| 1538 | // if (avio_feof(s->pb)) { |
| 1539 | // ret = 0; |
| 1540 | // } |
| 1541 | avio_seek(s->pb, current_pos, SEEK_SET); |
| 1542 | return ret; |
| 1543 | } |
| 1544 | |
| 1545 | static int asf_read_seek(AVFormatContext *s, int stream_index, |
| 1546 | int64_t pts, int flags) |
| 1547 | { |
| 1548 | ASFContext *asf = s->priv_data; |
| 1549 | AVStream *st = s->streams[stream_index]; |
| 1550 | int ret = 0; |
| 1551 | |
| 1552 | if (s->packet_size <= 0) |
| 1553 | return -1; |
| 1554 | |
| 1555 | /* Try using the protocol's read_seek if available */ |
| 1556 | if (s->pb) { |
| 1557 | int ret = avio_seek_time(s->pb, stream_index, pts, flags); |
| 1558 | if (ret >= 0) |
| 1559 | asf_reset_header(s); |
| 1560 | if (ret != AVERROR(ENOSYS)) |
| 1561 | return ret; |
| 1562 | } |
| 1563 | |
| 1564 | /* explicitly handle the case of seeking to 0 */ |
| 1565 | if (!pts) { |
| 1566 | asf_reset_header(s); |
| 1567 | avio_seek(s->pb, s->data_offset, SEEK_SET); |
| 1568 | return 0; |
| 1569 | } |
| 1570 | |
| 1571 | if (!asf->index_read) { |
| 1572 | ret = asf_build_simple_index(s, stream_index); |
| 1573 | if (ret < 0) |
| 1574 | asf->index_read = -1; |
| 1575 | } |
| 1576 | |
| 1577 | if (asf->index_read > 0 && st->index_entries) { |
| 1578 | int index = av_index_search_timestamp(st, pts, flags); |
| 1579 | if (index >= 0) { |
| 1580 | /* find the position */ |
| 1581 | uint64_t pos = st->index_entries[index].pos; |
| 1582 | |
| 1583 | /* do the seek */ |
| 1584 | av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos); |
| 1585 | if(avio_seek(s->pb, pos, SEEK_SET) < 0) |
| 1586 | return -1; |
| 1587 | asf_reset_header(s); |
| 1588 | skip_to_key(s); |
| 1589 | return 0; |
| 1590 | } |
| 1591 | } |
| 1592 | /* no index or seeking by index failed */ |
| 1593 | if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0) |
| 1594 | return -1; |
| 1595 | asf_reset_header(s); |
| 1596 | skip_to_key(s); |
| 1597 | return 0; |
| 1598 | } |
| 1599 | |
| 1600 | AVInputFormat ff_asf_demuxer = { |
| 1601 | .name = "asf", |
| 1602 | .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"), |
| 1603 | .priv_data_size = sizeof(ASFContext), |
| 1604 | .read_probe = asf_probe, |
| 1605 | .read_header = asf_read_header, |
| 1606 | .read_packet = asf_read_packet, |
| 1607 | .read_close = asf_read_close, |
| 1608 | .read_seek = asf_read_seek, |
| 1609 | .read_timestamp = asf_read_pts, |
| 1610 | .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH, |
| 1611 | .priv_class = &asf_class, |
| 1612 | }; |