| /* |
| * Microsoft Advanced Streaming Format demuxer |
| * Copyright (c) 2014 Alexandra Hájková |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavutil/attributes.h" |
| #include "libavutil/avassert.h" |
| #include "libavutil/avstring.h" |
| #include "libavutil/bswap.h" |
| #include "libavutil/common.h" |
| #include "libavutil/dict.h" |
| #include "libavutil/internal.h" |
| #include "libavutil/mathematics.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/time_internal.h" |
| |
| #include "avformat.h" |
| #include "avio_internal.h" |
| #include "avlanguage.h" |
| #include "id3v2.h" |
| #include "internal.h" |
| #include "riff.h" |
| #include "asf.h" |
| #include "asfcrypt.h" |
| |
| #define ASF_BOOL 0x2 |
| #define ASF_WORD 0x5 |
| #define ASF_GUID 0x6 |
| #define ASF_DWORD 0x3 |
| #define ASF_QWORD 0x4 |
| #define ASF_UNICODE 0x0 |
| #define ASF_FLAG_BROADCAST 0x1 |
| #define ASF_BYTE_ARRAY 0x1 |
| #define ASF_TYPE_AUDIO 0x2 |
| #define ASF_TYPE_VIDEO 0x1 |
| #define ASF_STREAM_NUM 0x7F |
| #define ASF_MAX_STREAMS 128 |
| #define BMP_HEADER_SIZE 40 |
| #define ASF_NUM_OF_PAYLOADS 0x3F |
| #define ASF_ERROR_CORRECTION_LENGTH_TYPE 0x60 |
| #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2 |
| |
| typedef struct GUIDParseTable { |
| const char *name; |
| ff_asf_guid guid; |
| int (*read_object)(AVFormatContext *, const struct GUIDParseTable *); |
| int is_subobject; |
| } GUIDParseTable; |
| |
| typedef struct ASFPacket { |
| AVPacket avpkt; |
| int64_t dts; |
| uint32_t frame_num; // ASF payloads with the same number are parts of the same frame |
| int flags; |
| int data_size; |
| int duration; |
| int size_left; |
| uint8_t stream_index; |
| } ASFPacket; |
| |
| typedef struct ASFStream { |
| uint8_t stream_index; // from packet header |
| int index; // stream index in AVFormatContext, set in asf_read_stream_properties |
| int type; |
| int indexed; // added index entries from the Simple Index Object or not |
| int8_t span; // for deinterleaving |
| uint16_t virtual_pkt_len; |
| uint16_t virtual_chunk_len; |
| int16_t lang_idx; |
| ASFPacket pkt; |
| } ASFStream; |
| |
| typedef struct ASFStreamData{ |
| char langs[32]; |
| AVDictionary *asf_met; // for storing per-stream metadata |
| AVRational aspect_ratio; |
| } ASFStreamData; |
| |
| typedef struct ASFContext { |
| int data_reached; |
| int is_simple_index; // is simple index present or not 1/0 |
| int is_header; |
| |
| uint64_t preroll; |
| uint64_t nb_packets; // ASF packets |
| uint32_t packet_size; |
| int64_t send_time; |
| int duration; |
| |
| uint32_t b_flags; // flags with broadcast flag |
| uint32_t prop_flags; // file properties object flags |
| |
| uint64_t data_size; // data object size |
| uint64_t unknown_size; // size of the unknown object |
| |
| int64_t offset; // offset of the current object |
| |
| int64_t data_offset; |
| int64_t first_packet_offset; // packet offset |
| int64_t unknown_offset; // for top level header objects or subobjects without specified behavior |
| |
| // ASF file must not contain more than 128 streams according to the specification |
| ASFStream *asf_st[ASF_MAX_STREAMS]; |
| ASFStreamData asf_sd[ASF_MAX_STREAMS]; |
| int nb_streams; |
| |
| int stream_index; // from packet header, for the subpayload case |
| |
| // packet parameteres |
| uint64_t sub_header_offset; // offset of subplayload header |
| int64_t sub_dts; |
| uint8_t dts_delta; // for subpayloads |
| uint32_t packet_size_internal; // packet size stored inside ASFPacket, can be 0 |
| int64_t packet_offset; // offset of the current packet inside Data Object |
| uint32_t pad_len; // padding after payload |
| uint32_t rep_data_len; |
| |
| // packet state |
| uint64_t sub_left; // subpayloads left or not |
| unsigned int nb_sub; // number of subpayloads read so far from the current ASF packet |
| uint16_t mult_sub_len; // total length of subpayloads array inside multiple payload |
| uint64_t nb_mult_left; // multiple payloads left |
| int return_subpayload; |
| enum { |
| PARSE_PACKET_HEADER, |
| READ_SINGLE, |
| READ_MULTI, |
| READ_MULTI_SUB |
| } state; |
| } ASFContext; |
| |
| static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size); |
| static const GUIDParseTable *find_guid(ff_asf_guid guid); |
| |
| static int asf_probe(AVProbeData *pd) |
| { |
| /* check file header */ |
| if (!ff_guidcmp(pd->buf, &ff_asf_header)) |
| return AVPROBE_SCORE_MAX/2; |
| else |
| return 0; |
| } |
| |
| static void swap_guid(ff_asf_guid guid) |
| { |
| FFSWAP(unsigned char, guid[0], guid[3]); |
| FFSWAP(unsigned char, guid[1], guid[2]); |
| FFSWAP(unsigned char, guid[4], guid[5]); |
| FFSWAP(unsigned char, guid[6], guid[7]); |
| } |
| |
| static void align_position(AVIOContext *pb, int64_t offset, uint64_t size) |
| { |
| if (size < INT64_MAX - offset && avio_tell(pb) != offset + size) |
| avio_seek(pb, offset + size, SEEK_SET); |
| } |
| |
| static int asf_read_unknown(AVFormatContext *s, const GUIDParseTable *g) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| uint64_t size = avio_rl64(pb); |
| int ret; |
| |
| if (size > INT64_MAX) |
| return AVERROR_INVALIDDATA; |
| |
| if (asf->is_header) |
| asf->unknown_size = size; |
| asf->is_header = 0; |
| if (!g->is_subobject) { |
| if (!(ret = strcmp(g->name, "Header Extension"))) |
| avio_skip(pb, 22); // skip reserved fields and Data Size |
| if ((ret = detect_unknown_subobject(s, asf->unknown_offset, |
| asf->unknown_size)) < 0) |
| return ret; |
| } else { |
| if (size < 24) { |
| av_log(s, AV_LOG_ERROR, "Too small size %"PRIu64" (< 24).\n", size); |
| return AVERROR_INVALIDDATA; |
| } |
| avio_skip(pb, size - 24); |
| } |
| |
| return 0; |
| } |
| |
| static int get_asf_string(AVIOContext *pb, int maxlen, char *buf, int buflen) |
| { |
| char *q = buf; |
| int ret = 0; |
| if (buflen <= 0) |
| return AVERROR(EINVAL); |
| while (ret + 1 < maxlen) { |
| uint8_t tmp; |
| uint32_t ch; |
| GET_UTF16(ch, (ret += 2) <= maxlen ? avio_rl16(pb) : 0, break;); |
| PUT_UTF8(ch, tmp, if (q - buf < buflen - 1) *q++ = tmp;) |
| } |
| *q = 0; |
| |
| return ret; |
| } |
| |
| static int asf_read_marker(AVFormatContext *s, const GUIDParseTable *g) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| uint64_t size = avio_rl64(pb); |
| int i, nb_markers, ret; |
| size_t len; |
| char name[1024]; |
| |
| avio_skip(pb, 8); |
| avio_skip(pb, 8); // skip reserved GUID |
| nb_markers = avio_rl32(pb); |
| avio_skip(pb, 2); // skip reserved field |
| len = avio_rl16(pb); |
| for (i = 0; i < len; i++) |
| avio_skip(pb, 1); |
| |
| for (i = 0; i < nb_markers; i++) { |
| int64_t pts; |
| |
| avio_skip(pb, 8); |
| pts = avio_rl64(pb); |
| pts -= asf->preroll * 10000; |
| avio_skip(pb, 2); // entry length |
| avio_skip(pb, 4); // send time |
| avio_skip(pb, 4); // flags |
| len = avio_rl32(pb); |
| |
| if ((ret = avio_get_str16le(pb, len, name, |
| sizeof(name))) < len) |
| avio_skip(pb, len - ret); |
| avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pts, |
| AV_NOPTS_VALUE, name); |
| } |
| align_position(pb, asf->offset, size); |
| |
| return 0; |
| } |
| |
| static int asf_read_metadata(AVFormatContext *s, const char *title, uint16_t len, |
| unsigned char *ch, uint16_t buflen) |
| { |
| AVIOContext *pb = s->pb; |
| |
| avio_get_str16le(pb, len, ch, buflen); |
| if (ch[0]) { |
| if (av_dict_set(&s->metadata, title, ch, 0) < 0) |
| av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n"); |
| } |
| |
| return 0; |
| } |
| |
| static int asf_read_value(AVFormatContext *s, const uint8_t *name, |
| uint16_t val_len, int type, AVDictionary **met) |
| { |
| int ret; |
| uint8_t *value; |
| uint16_t buflen = 2 * val_len + 1; |
| AVIOContext *pb = s->pb; |
| |
| value = av_malloc(buflen); |
| if (!value) |
| return AVERROR(ENOMEM); |
| if (type == ASF_UNICODE) { |
| // get_asf_string reads UTF-16 and converts it to UTF-8 which needs longer buffer |
| if ((ret = get_asf_string(pb, val_len, value, buflen)) < 0) |
| goto failed; |
| if (av_dict_set(met, name, value, 0) < 0) |
| av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n"); |
| } else { |
| char buf[256]; |
| if (val_len > sizeof(buf)) { |
| ret = AVERROR_INVALIDDATA; |
| goto failed; |
| } |
| if ((ret = avio_read(pb, value, val_len)) < 0) |
| goto failed; |
| if (ret < 2 * val_len) |
| value[ret] = '\0'; |
| else |
| value[2 * val_len - 1] = '\0'; |
| snprintf(buf, sizeof(buf), "%s", value); |
| if (av_dict_set(met, name, buf, 0) < 0) |
| av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n"); |
| } |
| av_freep(&value); |
| |
| return 0; |
| |
| failed: |
| av_freep(&value); |
| return ret; |
| } |
| static int asf_read_generic_value(AVIOContext *pb, int type, uint64_t *value) |
| { |
| |
| switch (type) { |
| case ASF_BOOL: |
| *value = avio_rl16(pb); |
| break; |
| case ASF_DWORD: |
| *value = avio_rl32(pb); |
| break; |
| case ASF_QWORD: |
| *value = avio_rl64(pb); |
| break; |
| case ASF_WORD: |
| *value = avio_rl16(pb); |
| break; |
| default: |
| return AVERROR_INVALIDDATA; |
| } |
| |
| return 0; |
| } |
| |
| static int asf_set_metadata(AVFormatContext *s, const uint8_t *name, |
| int type, AVDictionary **met) |
| { |
| AVIOContext *pb = s->pb; |
| uint64_t value; |
| char buf[32]; |
| int ret; |
| |
| ret = asf_read_generic_value(pb, type, &value); |
| if (ret < 0) |
| return ret; |
| |
| snprintf(buf, sizeof(buf), "%"PRIu64, value); |
| if (av_dict_set(met, name, buf, 0) < 0) |
| av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n"); |
| |
| return 0; |
| } |
| |
| /* MSDN claims that this should be "compatible with the ID3 frame, APIC", |
| * but in reality this is only loosely similar */ |
| static int asf_read_picture(AVFormatContext *s, int len) |
| { |
| ASFContext *asf = s->priv_data; |
| AVPacket pkt = { 0 }; |
| const CodecMime *mime = ff_id3v2_mime_tags; |
| enum AVCodecID id = AV_CODEC_ID_NONE; |
| char mimetype[64]; |
| uint8_t *desc = NULL; |
| AVStream *st = NULL; |
| int ret, type, picsize, desc_len; |
| ASFStream *asf_st; |
| |
| /* type + picsize + mime + desc */ |
| if (len < 1 + 4 + 2 + 2) { |
| av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| /* picture type */ |
| type = avio_r8(s->pb); |
| len--; |
| if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) { |
| av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type); |
| type = 0; |
| } |
| |
| /* picture data size */ |
| picsize = avio_rl32(s->pb); |
| len -= 4; |
| |
| /* picture MIME type */ |
| len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype)); |
| while (mime->id != AV_CODEC_ID_NONE) { |
| if (!strncmp(mime->str, mimetype, sizeof(mimetype))) { |
| id = mime->id; |
| break; |
| } |
| mime++; |
| } |
| if (id == AV_CODEC_ID_NONE) { |
| av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n", |
| mimetype); |
| return 0; |
| } |
| |
| if (picsize >= len) { |
| av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n", |
| picsize, len); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| /* picture description */ |
| desc_len = (len - picsize) * 2 + 1; |
| desc = av_malloc(desc_len); |
| if (!desc) |
| return AVERROR(ENOMEM); |
| len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len); |
| |
| ret = av_get_packet(s->pb, &pkt, picsize); |
| if (ret < 0) |
| goto fail; |
| |
| st = avformat_new_stream(s, NULL); |
| if (!st) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(*asf_st)); |
| asf_st = asf->asf_st[asf->nb_streams]; |
| if (!asf_st) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| |
| st->disposition |= AV_DISPOSITION_ATTACHED_PIC; |
| st->codec->codec_type = asf_st->type = AVMEDIA_TYPE_VIDEO; |
| st->codec->codec_id = id; |
| st->attached_pic = pkt; |
| st->attached_pic.stream_index = asf_st->index = st->index; |
| st->attached_pic.flags |= AV_PKT_FLAG_KEY; |
| |
| asf->nb_streams++; |
| |
| if (*desc) { |
| if (av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL) < 0) |
| av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n"); |
| } else |
| av_freep(&desc); |
| |
| if (av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0) < 0) |
| av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n"); |
| |
| return 0; |
| |
| fail: |
| av_freep(&desc); |
| av_packet_unref(&pkt); |
| return ret; |
| } |
| |
| static void get_id3_tag(AVFormatContext *s, int len) |
| { |
| ID3v2ExtraMeta *id3v2_extra_meta = NULL; |
| |
| ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, len); |
| if (id3v2_extra_meta) |
| ff_id3v2_parse_apic(s, &id3v2_extra_meta); |
| ff_id3v2_free_extra_meta(&id3v2_extra_meta); |
| } |
| |
| static int process_metadata(AVFormatContext *s, const uint8_t *name, uint16_t name_len, |
| uint16_t val_len, uint16_t type, AVDictionary **met) |
| { |
| int ret; |
| ff_asf_guid guid; |
| |
| if (val_len) { |
| switch (type) { |
| case ASF_UNICODE: |
| asf_read_value(s, name, val_len, type, met); |
| break; |
| case ASF_BYTE_ARRAY: |
| if (!strcmp(name, "WM/Picture")) // handle cover art |
| asf_read_picture(s, val_len); |
| else if (!strcmp(name, "ID3")) // handle ID3 tag |
| get_id3_tag(s, val_len); |
| else |
| asf_read_value(s, name, val_len, type, met); |
| break; |
| case ASF_GUID: |
| ff_get_guid(s->pb, &guid); |
| break; |
| default: |
| if ((ret = asf_set_metadata(s, name, type, met)) < 0) |
| return ret; |
| break; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int asf_read_ext_content(AVFormatContext *s, const GUIDParseTable *g) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| uint64_t size = avio_rl64(pb); |
| uint16_t nb_desc = avio_rl16(pb); |
| int i, ret; |
| |
| for (i = 0; i < nb_desc; i++) { |
| uint16_t name_len, type, val_len; |
| uint8_t *name = NULL; |
| |
| name_len = avio_rl16(pb); |
| if (!name_len) |
| return AVERROR_INVALIDDATA; |
| name = av_malloc(name_len); |
| if (!name) |
| return AVERROR(ENOMEM); |
| avio_get_str16le(pb, name_len, name, |
| name_len); |
| type = avio_rl16(pb); |
| // BOOL values are 16 bits long in the Metadata Object |
| // but 32 bits long in the Extended Content Description Object |
| if (type == ASF_BOOL) |
| type = ASF_DWORD; |
| val_len = avio_rl16(pb); |
| |
| ret = process_metadata(s, name, name_len, val_len, type, &s->metadata); |
| av_freep(&name); |
| if (ret < 0) |
| return ret; |
| } |
| |
| align_position(pb, asf->offset, size); |
| return 0; |
| } |
| |
| static AVStream *find_stream(AVFormatContext *s, uint16_t st_num) |
| { |
| AVStream *st = NULL; |
| ASFContext *asf = s->priv_data; |
| int i; |
| |
| for (i = 0; i < asf->nb_streams; i++) { |
| if (asf->asf_st[i]->stream_index == st_num) { |
| st = s->streams[asf->asf_st[i]->index]; |
| break; |
| } |
| } |
| |
| return st; |
| } |
| |
| static int asf_store_aspect_ratio(AVFormatContext *s, uint8_t st_num, uint8_t *name, int type) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| uint64_t value = 0; |
| int ret; |
| |
| ret = asf_read_generic_value(pb, type, &value); |
| if (ret < 0) |
| return ret; |
| |
| if (st_num < ASF_MAX_STREAMS) { |
| if (!strcmp(name, "AspectRatioX")) |
| asf->asf_sd[st_num].aspect_ratio.num = value; |
| else |
| asf->asf_sd[st_num].aspect_ratio.den = value; |
| } |
| return 0; |
| } |
| |
| static int asf_read_metadata_obj(AVFormatContext *s, const GUIDParseTable *g) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| uint64_t size = avio_rl64(pb); |
| uint16_t nb_recs = avio_rl16(pb); // number of records in the Description Records list |
| int i, ret; |
| |
| for (i = 0; i < nb_recs; i++) { |
| uint16_t name_len, buflen, type, val_len, st_num; |
| uint8_t *name = NULL; |
| |
| avio_skip(pb, 2); // skip reserved field |
| st_num = avio_rl16(pb); |
| name_len = avio_rl16(pb); |
| buflen = 2 * name_len + 1; |
| if (!name_len) |
| break; |
| type = avio_rl16(pb); |
| val_len = avio_rl32(pb); |
| name = av_malloc(buflen); |
| if (!name) |
| return AVERROR(ENOMEM); |
| avio_get_str16le(pb, name_len, name, |
| buflen); |
| if (!strcmp(name, "AspectRatioX") || !strcmp(name, "AspectRatioY")) { |
| ret = asf_store_aspect_ratio(s, st_num, name, type); |
| if (ret < 0) { |
| av_freep(&name); |
| break; |
| } |
| } else { |
| if (st_num < ASF_MAX_STREAMS) { |
| if ((ret = process_metadata(s, name, name_len, val_len, type, |
| &asf->asf_sd[st_num].asf_met)) < 0) { |
| av_freep(&name); |
| break; |
| } |
| } |
| } |
| av_freep(&name); |
| } |
| |
| align_position(pb, asf->offset, size); |
| return 0; |
| } |
| |
| static int asf_read_content_desc(AVFormatContext *s, const GUIDParseTable *g) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| int i; |
| static const char *const titles[] = |
| { "Title", "Author", "Copyright", "Description", "Rate" }; |
| uint16_t len[5], buflen[5] = { 0 }; |
| uint8_t *ch; |
| uint64_t size = avio_rl64(pb); |
| |
| for (i = 0; i < 5; i++) { |
| len[i] = avio_rl16(pb); |
| // utf8 string should be <= 2 * utf16 string, extra byte for the terminator |
| buflen[i] = 2 * len[i] + 1; |
| } |
| |
| for (i = 0; i < 5; i++) { |
| ch = av_malloc(buflen[i]); |
| if (!ch) |
| return(AVERROR(ENOMEM)); |
| asf_read_metadata(s, titles[i], len[i], ch, buflen[i]); |
| av_freep(&ch); |
| } |
| align_position(pb, asf->offset, size); |
| |
| return 0; |
| } |
| |
| static int asf_read_properties(AVFormatContext *s, const GUIDParseTable *g) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| time_t creation_time; |
| |
| avio_rl64(pb); // read object size |
| avio_skip(pb, 16); // skip File ID |
| avio_skip(pb, 8); // skip File size |
| creation_time = avio_rl64(pb); |
| if (!(asf->b_flags & ASF_FLAG_BROADCAST)) { |
| struct tm tmbuf; |
| struct tm *tm; |
| char buf[64]; |
| |
| // creation date is in 100 ns units from 1 Jan 1601, conversion to s |
| creation_time /= 10000000; |
| // there are 11644473600 seconds between 1 Jan 1601 and 1 Jan 1970 |
| creation_time -= 11644473600; |
| tm = gmtime_r(&creation_time, &tmbuf); |
| if (tm) { |
| if (!strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm)) |
| buf[0] = '\0'; |
| } else |
| buf[0] = '\0'; |
| if (buf[0]) { |
| if (av_dict_set(&s->metadata, "creation_time", buf, 0) < 0) |
| av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n"); |
| } |
| } |
| asf->nb_packets = avio_rl64(pb); |
| asf->duration = avio_rl64(pb) / 10000; // stream duration |
| avio_skip(pb, 8); // skip send duration |
| asf->preroll = avio_rl64(pb); |
| asf->duration -= asf->preroll; |
| asf->b_flags = avio_rl32(pb); |
| avio_skip(pb, 4); // skip minimal packet size |
| asf->packet_size = avio_rl32(pb); |
| avio_skip(pb, 4); // skip max_bitrate |
| |
| return 0; |
| } |
| |
| static int parse_video_info(AVIOContext *pb, AVStream *st) |
| { |
| uint16_t size; |
| unsigned int tag; |
| |
| st->codec->width = avio_rl32(pb); |
| st->codec->height = avio_rl32(pb); |
| avio_skip(pb, 1); // skip reserved flags |
| size = avio_rl16(pb); // size of the Format Data |
| tag = ff_get_bmp_header(pb, st, NULL); |
| st->codec->codec_tag = tag; |
| st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag); |
| |
| if (size > BMP_HEADER_SIZE) { |
| int ret; |
| st->codec->extradata_size = size - BMP_HEADER_SIZE; |
| if (!(st->codec->extradata = av_malloc(st->codec->extradata_size + |
| AV_INPUT_BUFFER_PADDING_SIZE))) { |
| st->codec->extradata_size = 0; |
| return AVERROR(ENOMEM); |
| } |
| memset(st->codec->extradata + st->codec->extradata_size , 0, |
| AV_INPUT_BUFFER_PADDING_SIZE); |
| if ((ret = avio_read(pb, st->codec->extradata, |
| st->codec->extradata_size)) < 0) |
| return ret; |
| } |
| return 0; |
| } |
| |
| static int asf_read_stream_properties(AVFormatContext *s, const GUIDParseTable *g) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| uint64_t size; |
| uint32_t err_data_len, ts_data_len; // type specific data length |
| uint16_t flags; |
| ff_asf_guid stream_type; |
| enum AVMediaType type; |
| int i, ret; |
| uint8_t stream_index; |
| AVStream *st; |
| ASFStream *asf_st; |
| |
| // ASF file must not contain more than 128 streams according to the specification |
| if (asf->nb_streams >= ASF_MAX_STREAMS) |
| return AVERROR_INVALIDDATA; |
| |
| size = avio_rl64(pb); |
| ff_get_guid(pb, &stream_type); |
| if (!ff_guidcmp(&stream_type, &ff_asf_audio_stream)) |
| type = AVMEDIA_TYPE_AUDIO; |
| else if (!ff_guidcmp(&stream_type, &ff_asf_video_stream)) |
| type = AVMEDIA_TYPE_VIDEO; |
| else if (!ff_guidcmp(&stream_type, &ff_asf_jfif_media)) |
| type = AVMEDIA_TYPE_VIDEO; |
| else if (!ff_guidcmp(&stream_type, &ff_asf_command_stream)) |
| type = AVMEDIA_TYPE_DATA; |
| else if (!ff_guidcmp(&stream_type, |
| &ff_asf_ext_stream_embed_stream_header)) |
| type = AVMEDIA_TYPE_UNKNOWN; |
| else |
| return AVERROR_INVALIDDATA; |
| |
| ff_get_guid(pb, &stream_type); // error correction type |
| avio_skip(pb, 8); // skip the time offset |
| ts_data_len = avio_rl32(pb); |
| err_data_len = avio_rl32(pb); |
| flags = avio_rl16(pb); // bit 15 - Encrypted Content |
| |
| stream_index = flags & ASF_STREAM_NUM; |
| for (i = 0; i < asf->nb_streams; i++) |
| if (stream_index == asf->asf_st[i]->stream_index) { |
| av_log(s, AV_LOG_WARNING, |
| "Duplicate stream found, this stream will be ignored.\n"); |
| align_position(pb, asf->offset, size); |
| return 0; |
| } |
| |
| st = avformat_new_stream(s, NULL); |
| if (!st) |
| return AVERROR(ENOMEM); |
| avpriv_set_pts_info(st, 32, 1, 1000); // pts should be dword, in milliseconds |
| st->codec->codec_type = type; |
| asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(*asf_st)); |
| if (!asf->asf_st[asf->nb_streams]) |
| return AVERROR(ENOMEM); |
| asf_st = asf->asf_st[asf->nb_streams]; |
| asf->nb_streams++; |
| asf_st->stream_index = stream_index; |
| asf_st->index = st->index; |
| asf_st->indexed = 0; |
| st->id = flags & ASF_STREAM_NUM; |
| av_init_packet(&asf_st->pkt.avpkt); |
| asf_st->pkt.data_size = 0; |
| avio_skip(pb, 4); // skip reserved field |
| |
| switch (type) { |
| case AVMEDIA_TYPE_AUDIO: |
| asf_st->type = AVMEDIA_TYPE_AUDIO; |
| if ((ret = ff_get_wav_header(s, pb, st->codec, ts_data_len, 0)) < 0) |
| return ret; |
| break; |
| case AVMEDIA_TYPE_VIDEO: |
| asf_st->type = AVMEDIA_TYPE_VIDEO; |
| if ((ret = parse_video_info(pb, st)) < 0) |
| return ret; |
| break; |
| default: |
| avio_skip(pb, ts_data_len); |
| break; |
| } |
| |
| if (err_data_len) { |
| if (type == AVMEDIA_TYPE_AUDIO) { |
| uint8_t span = avio_r8(pb); |
| if (span > 1) { |
| asf_st->span = span; |
| asf_st->virtual_pkt_len = avio_rl16(pb); |
| asf_st->virtual_chunk_len = avio_rl16(pb); |
| if (!asf_st->virtual_chunk_len || !asf_st->virtual_pkt_len) |
| return AVERROR_INVALIDDATA; |
| avio_skip(pb, err_data_len - 5); |
| } else |
| avio_skip(pb, err_data_len - 1); |
| } else |
| avio_skip(pb, err_data_len); |
| } |
| |
| align_position(pb, asf->offset, size); |
| |
| return 0; |
| } |
| |
| static void set_language(AVFormatContext *s, const char *rfc1766, AVDictionary **met) |
| { |
| // language abbr should contain at least 2 chars |
| if (rfc1766 && strlen(rfc1766) > 1) { |
| const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any |
| const char *iso6392 = av_convert_lang_to(primary_tag, |
| AV_LANG_ISO639_2_BIBL); |
| if (iso6392) |
| if (av_dict_set(met, "language", iso6392, 0) < 0) |
| av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n"); |
| } |
| } |
| |
| static int asf_read_ext_stream_properties(AVFormatContext *s, const GUIDParseTable *g) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| AVStream *st = NULL; |
| ff_asf_guid guid; |
| uint16_t nb_st_name, nb_pay_exts, st_num, lang_idx; |
| int i, ret; |
| uint32_t bitrate; |
| uint64_t start_time, end_time, time_per_frame; |
| uint64_t size = avio_rl64(pb); |
| |
| start_time = avio_rl64(pb); |
| end_time = avio_rl64(pb); |
| bitrate = avio_rl32(pb); |
| avio_skip(pb, 28); // skip some unused values |
| st_num = avio_rl16(pb); |
| st_num &= ASF_STREAM_NUM; |
| lang_idx = avio_rl16(pb); // Stream Language ID Index |
| for (i = 0; i < asf->nb_streams; i++) { |
| if (st_num == asf->asf_st[i]->stream_index) { |
| st = s->streams[asf->asf_st[i]->index]; |
| asf->asf_st[i]->lang_idx = lang_idx; |
| break; |
| } |
| } |
| time_per_frame = avio_rl64(pb); // average time per frame |
| if (st) { |
| st->start_time = start_time; |
| st->duration = end_time - start_time; |
| st->codec->bit_rate = bitrate; |
| st->avg_frame_rate.num = 10000000; |
| st->avg_frame_rate.den = time_per_frame; |
| } |
| nb_st_name = avio_rl16(pb); |
| nb_pay_exts = avio_rl16(pb); |
| for (i = 0; i < nb_st_name; i++) { |
| uint16_t len; |
| |
| avio_rl16(pb); // Language ID Index |
| len = avio_rl16(pb); |
| avio_skip(pb, len); |
| } |
| |
| for (i = 0; i < nb_pay_exts; i++) { |
| uint32_t len; |
| avio_skip(pb, 16); // Extension System ID |
| avio_skip(pb, 2); // Extension Data Size |
| len = avio_rl32(pb); |
| avio_skip(pb, len); |
| } |
| |
| if ((ret = ff_get_guid(pb, &guid)) < 0) { |
| align_position(pb, asf->offset, size); |
| |
| return 0; |
| } |
| |
| g = find_guid(guid); |
| if (g && !(strcmp(g->name, "Stream Properties"))) { |
| if ((ret = g->read_object(s, g)) < 0) |
| return ret; |
| } |
| |
| align_position(pb, asf->offset, size); |
| return 0; |
| } |
| |
| static int asf_read_language_list(AVFormatContext *s, const GUIDParseTable *g) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| int i, ret; |
| uint64_t size = avio_rl64(pb); |
| uint16_t nb_langs = avio_rl16(pb); |
| |
| if (nb_langs < ASF_MAX_STREAMS) { |
| for (i = 0; i < nb_langs; i++) { |
| size_t len; |
| len = avio_r8(pb); |
| if (!len) |
| len = 6; |
| if ((ret = get_asf_string(pb, len, asf->asf_sd[i].langs, |
| sizeof(asf->asf_sd[i].langs))) < 0) { |
| return ret; |
| } |
| } |
| } |
| |
| align_position(pb, asf->offset, size); |
| return 0; |
| } |
| |
| // returns data object offset when reading this object for the first time |
| static int asf_read_data(AVFormatContext *s, const GUIDParseTable *g) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| uint64_t size = asf->data_size = avio_rl64(pb); |
| int i; |
| |
| if (!asf->data_reached) { |
| asf->data_reached = 1; |
| asf->data_offset = asf->offset; |
| } |
| |
| for (i = 0; i < asf->nb_streams; i++) { |
| if (!(asf->b_flags & ASF_FLAG_BROADCAST)) |
| s->streams[i]->duration = asf->duration; |
| } |
| asf->nb_mult_left = 0; |
| asf->sub_left = 0; |
| asf->state = PARSE_PACKET_HEADER; |
| asf->return_subpayload = 0; |
| asf->packet_size_internal = 0; |
| avio_skip(pb, 16); // skip File ID |
| size = avio_rl64(pb); // Total Data Packets |
| if (size != asf->nb_packets) |
| av_log(s, AV_LOG_WARNING, |
| "Number of Packets from File Properties Object is not equal to Total" |
| "Datapackets value! num of packets %"PRIu64" total num %"PRIu64".\n", |
| size, asf->nb_packets); |
| avio_skip(pb, 2); // skip reserved field |
| asf->first_packet_offset = avio_tell(pb); |
| if (pb->seekable && !(asf->b_flags & ASF_FLAG_BROADCAST)) |
| align_position(pb, asf->offset, asf->data_size); |
| |
| return 0; |
| } |
| |
| static int asf_read_simple_index(AVFormatContext *s, const GUIDParseTable *g) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| AVStream *st = NULL; |
| uint64_t interval; // index entry time interval in 100 ns units, usually it's 1s |
| uint32_t pkt_num, nb_entries; |
| int32_t prev_pkt_num = -1; |
| int i, ret; |
| uint64_t size = avio_rl64(pb); |
| |
| // simple index objects should be ordered by stream number, this loop tries to find |
| // the first not indexed video stream |
| for (i = 0; i < asf->nb_streams; i++) { |
| if ((asf->asf_st[i]->type == AVMEDIA_TYPE_VIDEO) && !asf->asf_st[i]->indexed) { |
| asf->asf_st[i]->indexed = 1; |
| st = s->streams[asf->asf_st[i]->index]; |
| break; |
| } |
| } |
| if (!st) { |
| avio_skip(pb, size - 24); // if there's no video stream, skip index object |
| return 0; |
| } |
| avio_skip(pb, 16); // skip File ID |
| interval = avio_rl64(pb); |
| avio_skip(pb, 4); |
| nb_entries = avio_rl32(pb); |
| for (i = 0; i < nb_entries; i++) { |
| pkt_num = avio_rl32(pb); |
| ret = avio_skip(pb, 2); |
| if (ret < 0) { |
| av_log(s, AV_LOG_ERROR, "Skipping failed in asf_read_simple_index.\n"); |
| return ret; |
| } |
| if (prev_pkt_num != pkt_num) { |
| av_add_index_entry(st, asf->first_packet_offset + asf->packet_size * |
| pkt_num, av_rescale(interval, i, 10000), |
| asf->packet_size, 0, AVINDEX_KEYFRAME); |
| prev_pkt_num = pkt_num; |
| } |
| } |
| asf->is_simple_index = 1; |
| align_position(pb, asf->offset, size); |
| |
| return 0; |
| } |
| |
| static const GUIDParseTable gdef[] = { |
| { "Data", { 0x75, 0xB2, 0x26, 0x36, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_data, 1 }, |
| { "Simple Index", { 0x33, 0x00, 0x08, 0x90, 0xE5, 0xB1, 0x11, 0xCF, 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB }, asf_read_simple_index, 1 }, |
| { "Content Description", { 0x75, 0xB2, 0x26, 0x33, 0x66 ,0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_content_desc, 1 }, |
| { "Extended Content Description", { 0xD2, 0xD0, 0xA4, 0x40, 0xE3, 0x07, 0x11, 0xD2, 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5e, 0xA8, 0x50 }, asf_read_ext_content, 1 }, |
| { "Stream Bitrate Properties", { 0x7B, 0xF8, 0x75, 0xCE, 0x46, 0x8D, 0x11, 0xD1, 0x8D, 0x82, 0x00, 0x60, 0x97, 0xC9, 0xA2, 0xB2 }, asf_read_unknown, 1 }, |
| { "File Properties", { 0x8C, 0xAB, 0xDC, 0xA1, 0xA9, 0x47, 0x11, 0xCF, 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_properties, 1 }, |
| { "Header Extension", { 0x5F, 0xBF, 0x03, 0xB5, 0xA9, 0x2E, 0x11, 0xCF, 0x8E, 0xE3, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_unknown, 0 }, |
| { "Stream Properties", { 0xB7, 0xDC, 0x07, 0x91, 0xA9, 0xB7, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_stream_properties, 1 }, |
| { "Codec List", { 0x86, 0xD1, 0x52, 0x40, 0x31, 0x1D, 0x11, 0xD0, 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 }, |
| { "Marker", { 0xF4, 0x87, 0xCD, 0x01, 0xA9, 0x51, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_marker, 1 }, |
| { "Script Command", { 0x1E, 0xFB, 0x1A, 0x30, 0x0B, 0x62, 0x11, 0xD0, 0xA3, 0x9B, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 }, |
| { "Language List", { 0x7C, 0x43, 0x46, 0xa9, 0xef, 0xe0, 0x4B, 0xFC, 0xB2, 0x29, 0x39, 0x3e, 0xde, 0x41, 0x5c, 0x85 }, asf_read_language_list, 1}, |
| { "Padding", { 0x18, 0x06, 0xD4, 0x74, 0xCA, 0xDF, 0x45, 0x09, 0xA4, 0xBA, 0x9A, 0xAB, 0xCB, 0x96, 0xAA, 0xE8 }, asf_read_unknown, 1 }, |
| { "DRMv1 Header", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 }, |
| { "DRMv2 Header", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9c }, asf_read_unknown, 1 }, |
| { "Index", { 0xD6, 0xE2, 0x29, 0xD3, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 }, |
| { "Media Object Index", { 0xFE, 0xB1, 0x03, 0xF8, 0x12, 0xAD, 0x4C, 0x64, 0x84, 0x0F, 0x2A, 0x1D, 0x2F, 0x7A, 0xD4, 0x8C }, asf_read_unknown, 1 }, |
| { "Timecode Index", { 0x3C, 0xB7, 0x3F, 0xD0, 0x0C, 0x4A, 0x48, 0x03, 0x95, 0x3D, 0xED, 0xF7, 0xB6, 0x22, 0x8F, 0x0C }, asf_read_unknown, 0 }, |
| { "Bitrate_Mutual_Exclusion", { 0xD6, 0xE2, 0x29, 0xDC, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 }, |
| { "Error Correction", { 0x75, 0xB2, 0x26, 0x35, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_unknown, 1 }, |
| { "Content Branding", { 0x22, 0x11, 0xB3, 0xFA, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 }, |
| { "Content Encryption", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 }, |
| { "Extended Content Encryption", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9C }, asf_read_unknown, 1 }, |
| { "Digital Signature", { 0x22, 0x11, 0xB3, 0xFC, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 }, |
| { "Extended Stream Properties", { 0x14, 0xE6, 0xA5, 0xCB, 0xC6, 0x72, 0x43, 0x32, 0x83, 0x99, 0xA9, 0x69, 0x52, 0x06, 0x5B, 0x5A }, asf_read_ext_stream_properties, 1 }, |
| { "Advanced Mutual Exclusion", { 0xA0, 0x86, 0x49, 0xCF, 0x47, 0x75, 0x46, 0x70, 0x8A, 0x16, 0x6E, 0x35, 0x35, 0x75, 0x66, 0xCD }, asf_read_unknown, 1 }, |
| { "Group Mutual Exclusion", { 0xD1, 0x46, 0x5A, 0x40, 0x5A, 0x79, 0x43, 0x38, 0xB7, 0x1B, 0xE3, 0x6B, 0x8F, 0xD6, 0xC2, 0x49 }, asf_read_unknown, 1}, |
| { "Stream Prioritization", { 0xD4, 0xFE, 0xD1, 0x5B, 0x88, 0xD3, 0x45, 0x4F, 0x81, 0xF0, 0xED, 0x5C, 0x45, 0x99, 0x9E, 0x24 }, asf_read_unknown, 1 }, |
| { "Bandwidth Sharing Object", { 0xA6, 0x96, 0x09, 0xE6, 0x51, 0x7B, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 }, |
| { "Metadata", { 0xC5, 0xF8, 0xCB, 0xEA, 0x5B, 0xAF, 0x48, 0x77, 0x84, 0x67, 0xAA, 0x8C, 0x44, 0xFA, 0x4C, 0xCA }, asf_read_metadata_obj, 1 }, |
| { "Metadata Library", { 0x44, 0x23, 0x1C, 0x94, 0x94, 0x98, 0x49, 0xD1, 0xA1, 0x41, 0x1D, 0x13, 0x4E, 0x45, 0x70, 0x54 }, asf_read_metadata_obj, 1 }, |
| { "Audio Spread", { 0xBF, 0xC3, 0xCD, 0x50, 0x61, 0x8F, 0x11, 0xCF, 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20 }, asf_read_unknown, 1 }, |
| { "Index Parameters", { 0xD6, 0xE2, 0x29, 0xDF, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 }, |
| { "Content Encryption System Windows Media DRM Network Devices", |
| { 0x7A, 0x07, 0x9B, 0xB6, 0xDA, 0XA4, 0x4e, 0x12, 0xA5, 0xCA, 0x91, 0xD3, 0x8D, 0xC1, 0x1A, 0x8D }, asf_read_unknown, 1 }, |
| { "Mutex Language", { 0xD6, 0xE2, 0x2A, 0x00, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 }, |
| { "Mutex Bitrate", { 0xD6, 0xE2, 0x2A, 0x01, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 }, |
| { "Mutex Unknown", { 0xD6, 0xE2, 0x2A, 0x02, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 }, |
| { "Bandwidth Sharing Exclusive", { 0xAF, 0x60, 0x60, 0xAA, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 }, |
| { "Bandwidth Sharing Partial", { 0xAF, 0x60, 0x60, 0xAB, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 }, |
| { "Payload Extension System Timecode", { 0x39, 0x95, 0x95, 0xEC, 0x86, 0x67, 0x4E, 0x2D, 0x8F, 0xDB, 0x98, 0x81, 0x4C, 0xE7, 0x6C, 0x1E }, asf_read_unknown, 1 }, |
| { "Payload Extension System File Name", { 0xE1, 0x65, 0xEC, 0x0E, 0x19, 0xED, 0x45, 0xD7, 0xB4, 0xA7, 0x25, 0xCB, 0xD1, 0xE2, 0x8E, 0x9B }, asf_read_unknown, 1 }, |
| { "Payload Extension System Content Type", { 0xD5, 0x90, 0xDC, 0x20, 0x07, 0xBC, 0x43, 0x6C, 0x9C, 0xF7, 0xF3, 0xBB, 0xFB, 0xF1, 0xA4, 0xDC }, asf_read_unknown, 1 }, |
| { "Payload Extension System Pixel Aspect Ratio", { 0x1, 0x1E, 0xE5, 0x54, 0xF9, 0xEA, 0x4B, 0xC8, 0x82, 0x1A, 0x37, 0x6B, 0x74, 0xE4, 0xC4, 0xB8 }, asf_read_unknown, 1 }, |
| { "Payload Extension System Sample Duration", { 0xC6, 0xBD, 0x94, 0x50, 0x86, 0x7F, 0x49, 0x07, 0x83, 0xA3, 0xC7, 0x79, 0x21, 0xB7, 0x33, 0xAD }, asf_read_unknown, 1 }, |
| { "Payload Extension System Encryption Sample ID", { 0x66, 0x98, 0xB8, 0x4E, 0x0A, 0xFA, 0x43, 0x30, 0xAE, 0xB2, 0x1C, 0x0A, 0x98, 0xD7, 0xA4, 0x4D }, asf_read_unknown, 1 }, |
| { "Payload Extension System Degradable JPEG", { 0x00, 0xE1, 0xAF, 0x06, 0x7B, 0xEC, 0x11, 0xD1, 0xA5, 0x82, 0x00, 0xC0, 0x4F, 0xC2, 0x9C, 0xFB }, asf_read_unknown, 1 }, |
| }; |
| |
| #define READ_LEN(flag, name, len) \ |
| do { \ |
| if ((flag) == name ## IS_BYTE) \ |
| len = avio_r8(pb); \ |
| else if ((flag) == name ## IS_WORD) \ |
| len = avio_rl16(pb); \ |
| else if ((flag) == name ## IS_DWORD) \ |
| len = avio_rl32(pb); \ |
| else \ |
| len = 0; \ |
| } while(0) |
| |
| static int asf_read_subpayload(AVFormatContext *s, AVPacket *pkt, int is_header) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| uint8_t sub_len; |
| int ret, i; |
| |
| if (is_header) { |
| asf->dts_delta = avio_r8(pb); |
| if (asf->nb_mult_left) { |
| asf->mult_sub_len = avio_rl16(pb); // total |
| } |
| asf->sub_header_offset = avio_tell(pb); |
| asf->nb_sub = 0; |
| asf->sub_left = 1; |
| } |
| sub_len = avio_r8(pb); |
| if ((ret = av_get_packet(pb, pkt, sub_len)) < 0) // each subpayload is entire frame |
| return ret; |
| for (i = 0; i < asf->nb_streams; i++) { |
| if (asf->stream_index == asf->asf_st[i]->stream_index) { |
| pkt->stream_index = asf->asf_st[i]->index; |
| break; |
| } |
| } |
| asf->return_subpayload = 1; |
| if (!sub_len) |
| asf->return_subpayload = 0; |
| |
| if (sub_len) |
| asf->nb_sub++; |
| pkt->dts = asf->sub_dts + (asf->nb_sub - 1) * asf->dts_delta - asf->preroll; |
| if (asf->nb_mult_left && (avio_tell(pb) >= |
| (asf->sub_header_offset + asf->mult_sub_len))) { |
| asf->sub_left = 0; |
| asf->nb_mult_left--; |
| } |
| if (avio_tell(pb) >= asf->packet_offset + asf->packet_size - asf->pad_len) { |
| asf->sub_left = 0; |
| if (!asf->nb_mult_left) { |
| avio_skip(pb, asf->pad_len); |
| if (avio_tell(pb) != asf->packet_offset + asf->packet_size) { |
| if (!asf->packet_size) |
| return AVERROR_INVALIDDATA; |
| av_log(s, AV_LOG_WARNING, |
| "Position %"PRId64" wrong, should be %"PRId64"\n", |
| avio_tell(pb), asf->packet_offset + asf->packet_size); |
| avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET); |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void reset_packet(ASFPacket *asf_pkt) |
| { |
| asf_pkt->size_left = 0; |
| asf_pkt->data_size = 0; |
| asf_pkt->duration = 0; |
| asf_pkt->flags = 0; |
| asf_pkt->dts = 0; |
| asf_pkt->duration = 0; |
| av_packet_unref(&asf_pkt->avpkt); |
| av_init_packet(&asf_pkt->avpkt); |
| } |
| |
| static int asf_read_replicated_data(AVFormatContext *s, ASFPacket *asf_pkt) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| int ret, data_size; |
| |
| if (!asf_pkt->data_size) { |
| data_size = avio_rl32(pb); // read media object size |
| if (data_size <= 0) |
| return AVERROR_INVALIDDATA; |
| if ((ret = av_new_packet(&asf_pkt->avpkt, data_size)) < 0) |
| return ret; |
| asf_pkt->data_size = asf_pkt->size_left = data_size; |
| } else |
| avio_skip(pb, 4); // reading of media object size is already done |
| asf_pkt->dts = avio_rl32(pb); // read presentation time |
| if (asf->rep_data_len && (asf->rep_data_len >= 8)) |
| avio_skip(pb, asf->rep_data_len - 8); // skip replicated data |
| |
| return 0; |
| } |
| |
| static int asf_read_multiple_payload(AVFormatContext *s, AVPacket *pkt, |
| ASFPacket *asf_pkt) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| uint16_t pay_len; |
| unsigned char *p; |
| int ret; |
| int skip = 0; |
| |
| // if replicated length is 1, subpayloads are present |
| if (asf->rep_data_len == 1) { |
| asf->sub_left = 1; |
| asf->state = READ_MULTI_SUB; |
| pkt->flags = asf_pkt->flags; |
| if ((ret = asf_read_subpayload(s, pkt, 1)) < 0) |
| return ret; |
| } else { |
| if (asf->rep_data_len) |
| if ((ret = asf_read_replicated_data(s, asf_pkt)) < 0) |
| return ret; |
| pay_len = avio_rl16(pb); // payload length should be WORD |
| if (pay_len > asf->packet_size) { |
| av_log(s, AV_LOG_ERROR, |
| "Error: invalid data packet size, pay_len %"PRIu16", " |
| "asf->packet_size %"PRIu32", offset %"PRId64".\n", |
| pay_len, asf->packet_size, avio_tell(pb)); |
| return AVERROR_INVALIDDATA; |
| } |
| p = asf_pkt->avpkt.data + asf_pkt->data_size - asf_pkt->size_left; |
| if (pay_len > asf_pkt->size_left) { |
| av_log(s, AV_LOG_ERROR, |
| "Error: invalid buffer size, pay_len %d, data size left %d.\n", |
| pay_len, asf_pkt->size_left); |
| skip = pay_len - asf_pkt->size_left; |
| pay_len = asf_pkt->size_left; |
| } |
| if (asf_pkt->size_left <= 0) |
| return AVERROR_INVALIDDATA; |
| if ((ret = avio_read(pb, p, pay_len)) < 0) |
| return ret; |
| if (s->key && s->keylen == 20) |
| ff_asfcrypt_dec(s->key, p, ret); |
| avio_skip(pb, skip); |
| asf_pkt->size_left -= pay_len; |
| asf->nb_mult_left--; |
| } |
| |
| return 0; |
| } |
| |
| static int asf_read_single_payload(AVFormatContext *s, ASFPacket *asf_pkt) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| int64_t offset; |
| uint64_t size; |
| unsigned char *p; |
| int ret, data_size; |
| |
| if (!asf_pkt->data_size) { |
| data_size = avio_rl32(pb); // read media object size |
| if (data_size <= 0) |
| return AVERROR_EOF; |
| if ((ret = av_new_packet(&asf_pkt->avpkt, data_size)) < 0) |
| return ret; |
| asf_pkt->data_size = asf_pkt->size_left = data_size; |
| } else |
| avio_skip(pb, 4); // skip media object size |
| asf_pkt->dts = avio_rl32(pb); // read presentation time |
| if (asf->rep_data_len >= 8) |
| avio_skip(pb, asf->rep_data_len - 8); // skip replicated data |
| offset = avio_tell(pb); |
| |
| // size of the payload - size of the packet without header and padding |
| if (asf->packet_size_internal) |
| size = asf->packet_size_internal - offset + asf->packet_offset - asf->pad_len; |
| else |
| size = asf->packet_size - offset + asf->packet_offset - asf->pad_len; |
| if (size > asf->packet_size) { |
| av_log(s, AV_LOG_ERROR, |
| "Error: invalid data packet size, offset %"PRId64".\n", |
| avio_tell(pb)); |
| return AVERROR_INVALIDDATA; |
| } |
| p = asf_pkt->avpkt.data + asf_pkt->data_size - asf_pkt->size_left; |
| if (size > asf_pkt->size_left || asf_pkt->size_left <= 0) |
| return AVERROR_INVALIDDATA; |
| if (asf_pkt->size_left > size) |
| asf_pkt->size_left -= size; |
| else |
| asf_pkt->size_left = 0; |
| if ((ret = avio_read(pb, p, size)) < 0) |
| return ret; |
| if (s->key && s->keylen == 20) |
| ff_asfcrypt_dec(s->key, p, ret); |
| if (asf->packet_size_internal) |
| avio_skip(pb, asf->packet_size - asf->packet_size_internal); |
| avio_skip(pb, asf->pad_len); // skip padding |
| |
| return 0; |
| } |
| |
| static int asf_read_payload(AVFormatContext *s, AVPacket *pkt) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| int ret, i; |
| ASFPacket *asf_pkt = NULL; |
| |
| if (!asf->sub_left) { |
| uint32_t off_len, media_len; |
| uint8_t stream_num; |
| |
| stream_num = avio_r8(pb); |
| asf->stream_index = stream_num & ASF_STREAM_NUM; |
| for (i = 0; i < asf->nb_streams; i++) { |
| if (asf->stream_index == asf->asf_st[i]->stream_index) { |
| asf_pkt = &asf->asf_st[i]->pkt; |
| asf_pkt->stream_index = asf->asf_st[i]->index; |
| break; |
| } |
| } |
| if (!asf_pkt) { |
| if (asf->packet_offset + asf->packet_size <= asf->data_offset + asf->data_size) { |
| if (!asf->packet_size) { |
| av_log(s, AV_LOG_ERROR, "Invalid packet size 0.\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET); |
| av_log(s, AV_LOG_WARNING, "Skipping the stream with the invalid stream index %d.\n", |
| asf->stream_index); |
| return AVERROR(EAGAIN); |
| } else |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (stream_num >> 7) |
| asf_pkt->flags |= AV_PKT_FLAG_KEY; |
| READ_LEN(asf->prop_flags & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE, |
| ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_, media_len); |
| READ_LEN(asf->prop_flags & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE, |
| ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_, off_len); |
| READ_LEN(asf->prop_flags & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE, |
| ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_, asf->rep_data_len); |
| if (asf_pkt->size_left && (asf_pkt->frame_num != media_len)) { |
| av_log(s, AV_LOG_WARNING, "Unfinished frame will be ignored\n"); |
| reset_packet(asf_pkt); |
| } |
| asf_pkt->frame_num = media_len; |
| asf->sub_dts = off_len; |
| if (asf->nb_mult_left) { |
| if ((ret = asf_read_multiple_payload(s, pkt, asf_pkt)) < 0) |
| return ret; |
| } else if (asf->rep_data_len == 1) { |
| asf->sub_left = 1; |
| asf->state = READ_SINGLE; |
| pkt->flags = asf_pkt->flags; |
| if ((ret = asf_read_subpayload(s, pkt, 1)) < 0) |
| return ret; |
| } else { |
| if ((ret = asf_read_single_payload(s, asf_pkt)) < 0) |
| return ret; |
| } |
| } else { |
| for (i = 0; i <= asf->nb_streams; i++) { |
| if (asf->stream_index == asf->asf_st[i]->stream_index) { |
| asf_pkt = &asf->asf_st[i]->pkt; |
| break; |
| } |
| } |
| if (!asf_pkt) |
| return AVERROR_INVALIDDATA; |
| pkt->flags = asf_pkt->flags; |
| pkt->dts = asf_pkt->dts; |
| pkt->stream_index = asf->asf_st[i]->index; |
| if ((ret = asf_read_subpayload(s, pkt, 0)) < 0) // read subpayload without its header |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int asf_read_packet_header(AVFormatContext *s) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| uint64_t size; |
| uint32_t av_unused seq; |
| unsigned char error_flags, len_flags, pay_flags; |
| |
| asf->packet_offset = avio_tell(pb); |
| error_flags = avio_r8(pb); // read Error Correction Flags |
| if (error_flags & ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT) { |
| if (!(error_flags & ASF_ERROR_CORRECTION_LENGTH_TYPE)) { |
| size = error_flags & ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; |
| avio_skip(pb, size); |
| } |
| len_flags = avio_r8(pb); |
| } else |
| len_flags = error_flags; |
| asf->prop_flags = avio_r8(pb); |
| READ_LEN(len_flags & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE, |
| ASF_PPI_FLAG_PACKET_LENGTH_FIELD_, asf->packet_size_internal); |
| READ_LEN(len_flags & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE, |
| ASF_PPI_FLAG_SEQUENCE_FIELD_, seq); |
| READ_LEN(len_flags & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE, |
| ASF_PPI_FLAG_PADDING_LENGTH_FIELD_, asf->pad_len ); |
| asf->send_time = avio_rl32(pb); // send time |
| avio_skip(pb, 2); // skip duration |
| if (len_flags & ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT) { // Multiple Payloads present |
| pay_flags = avio_r8(pb); |
| asf->nb_mult_left = (pay_flags & ASF_NUM_OF_PAYLOADS); |
| } |
| |
| return 0; |
| } |
| |
| static int asf_deinterleave(AVFormatContext *s, ASFPacket *asf_pkt, int st_num) |
| { |
| ASFContext *asf = s->priv_data; |
| ASFStream *asf_st = asf->asf_st[st_num]; |
| unsigned char *p = asf_pkt->avpkt.data; |
| uint16_t pkt_len = asf->asf_st[st_num]->virtual_pkt_len; |
| uint16_t chunk_len = asf->asf_st[st_num]->virtual_chunk_len; |
| int nchunks = pkt_len / chunk_len; |
| AVPacket pkt; |
| int pos = 0, j, l, ret; |
| |
| |
| if ((ret = av_new_packet(&pkt, asf_pkt->data_size)) < 0) |
| return ret; |
| |
| while (asf_pkt->data_size >= asf_st->span * pkt_len + pos) { |
| if (pos >= asf_pkt->data_size) { |
| break; |
| } |
| for (l = 0; l < pkt_len; l++) { |
| if (pos >= asf_pkt->data_size) { |
| break; |
| } |
| for (j = 0; j < asf_st->span; j++) { |
| if ((pos + chunk_len) >= asf_pkt->data_size) |
| break; |
| memcpy(pkt.data + pos, |
| p + (j * nchunks + l) * chunk_len, |
| chunk_len); |
| pos += chunk_len; |
| } |
| } |
| p += asf_st->span * pkt_len; |
| if (p > asf_pkt->avpkt.data + asf_pkt->data_size) |
| break; |
| } |
| av_packet_unref(&asf_pkt->avpkt); |
| asf_pkt->avpkt = pkt; |
| |
| return 0; |
| } |
| |
| static int asf_read_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| int ret, i; |
| |
| if ((avio_tell(pb) >= asf->data_offset + asf->data_size) && |
| !(asf->b_flags & ASF_FLAG_BROADCAST)) |
| return AVERROR_EOF; |
| while (!pb->eof_reached) { |
| if (asf->state == PARSE_PACKET_HEADER) { |
| asf_read_packet_header(s); |
| if (pb->eof_reached) |
| break; |
| if (!asf->nb_mult_left) |
| asf->state = READ_SINGLE; |
| else |
| asf->state = READ_MULTI; |
| } |
| ret = asf_read_payload(s, pkt); |
| if (ret == AVERROR(EAGAIN)) { |
| asf->state = PARSE_PACKET_HEADER; |
| continue; |
| } |
| else if (ret < 0) |
| return ret; |
| |
| switch (asf->state) { |
| case READ_SINGLE: |
| if (!asf->sub_left) |
| asf->state = PARSE_PACKET_HEADER; |
| break; |
| case READ_MULTI_SUB: |
| if (!asf->sub_left && !asf->nb_mult_left) { |
| asf->state = PARSE_PACKET_HEADER; |
| if (!asf->return_subpayload && |
| (avio_tell(pb) <= asf->packet_offset + |
| asf->packet_size - asf->pad_len)) |
| avio_skip(pb, asf->pad_len); // skip padding |
| if (asf->packet_offset + asf->packet_size > avio_tell(pb)) |
| avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET); |
| } else if (!asf->sub_left) |
| asf->state = READ_MULTI; |
| break; |
| case READ_MULTI: |
| if (!asf->nb_mult_left) { |
| asf->state = PARSE_PACKET_HEADER; |
| if (!asf->return_subpayload && |
| (avio_tell(pb) <= asf->packet_offset + |
| asf->packet_size - asf->pad_len)) |
| avio_skip(pb, asf->pad_len); // skip padding |
| if (asf->packet_offset + asf->packet_size > avio_tell(pb)) |
| avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET); |
| } |
| break; |
| } |
| if (asf->return_subpayload) { |
| asf->return_subpayload = 0; |
| return 0; |
| } |
| for (i = 0; i < s->nb_streams; i++) { |
| ASFPacket *asf_pkt = &asf->asf_st[i]->pkt; |
| if (asf_pkt && !asf_pkt->size_left && asf_pkt->data_size) { |
| if (asf->asf_st[i]->span > 1 && |
| asf->asf_st[i]->type == AVMEDIA_TYPE_AUDIO) |
| if ((ret = asf_deinterleave(s, asf_pkt, i)) < 0) |
| return ret; |
| av_packet_move_ref(pkt, &asf_pkt->avpkt); |
| pkt->stream_index = asf->asf_st[i]->index; |
| pkt->flags = asf_pkt->flags; |
| pkt->dts = asf_pkt->dts - asf->preroll; |
| asf_pkt->data_size = 0; |
| asf_pkt->frame_num = 0; |
| return 0; |
| } |
| } |
| } |
| |
| if (pb->eof_reached) |
| return AVERROR_EOF; |
| |
| return 0; |
| } |
| |
| static int asf_read_close(AVFormatContext *s) |
| { |
| ASFContext *asf = s->priv_data; |
| int i; |
| |
| for (i = 0; i < ASF_MAX_STREAMS; i++) { |
| av_dict_free(&asf->asf_sd[i].asf_met); |
| if (i < asf->nb_streams) { |
| av_packet_unref(&asf->asf_st[i]->pkt.avpkt); |
| av_freep(&asf->asf_st[i]); |
| } |
| } |
| |
| asf->nb_streams = 0; |
| return 0; |
| } |
| |
| static void reset_packet_state(AVFormatContext *s) |
| { |
| ASFContext *asf = s->priv_data; |
| int i; |
| |
| asf->state = PARSE_PACKET_HEADER; |
| asf->offset = 0; |
| asf->return_subpayload = 0; |
| asf->sub_left = 0; |
| asf->sub_header_offset = 0; |
| asf->packet_offset = asf->first_packet_offset; |
| asf->pad_len = 0; |
| asf->rep_data_len = 0; |
| asf->dts_delta = 0; |
| asf->mult_sub_len = 0; |
| asf->nb_mult_left = 0; |
| asf->nb_sub = 0; |
| asf->prop_flags = 0; |
| asf->sub_dts = 0; |
| for (i = 0; i < asf->nb_streams; i++) { |
| ASFPacket *pkt = &asf->asf_st[i]->pkt; |
| pkt->size_left = 0; |
| pkt->data_size = 0; |
| pkt->duration = 0; |
| pkt->flags = 0; |
| pkt->dts = 0; |
| pkt->duration = 0; |
| av_packet_unref(&pkt->avpkt); |
| av_init_packet(&pkt->avpkt); |
| } |
| } |
| |
| /* |
| * Find a timestamp for the requested position within the payload |
| * where the pos (position) is the offset inside the Data Object. |
| * When position is not on the packet boundary, asf_read_timestamp tries |
| * to find the closest packet offset after this position. If this packet |
| * is a key frame, this packet timestamp is read and an index entry is created |
| * for the packet. If this packet belongs to the requested stream, |
| * asf_read_timestamp upgrades pos to the packet beginning offset and |
| * returns this packet's dts. So returned dts is the dts of the first key frame with |
| * matching stream number after given position. |
| */ |
| static int64_t asf_read_timestamp(AVFormatContext *s, int stream_index, |
| int64_t *pos, int64_t pos_limit) |
| { |
| ASFContext *asf = s->priv_data; |
| int64_t pkt_pos = *pos, pkt_offset, dts = AV_NOPTS_VALUE, data_end; |
| AVPacket pkt; |
| int n; |
| |
| data_end = asf->data_offset + asf->data_size; |
| |
| n = (pkt_pos - asf->first_packet_offset + asf->packet_size - 1) / |
| asf->packet_size; |
| n = av_clip(n, 0, ((data_end - asf->first_packet_offset) / asf->packet_size - 1)); |
| pkt_pos = asf->first_packet_offset + n * asf->packet_size; |
| |
| avio_seek(s->pb, pkt_pos, SEEK_SET); |
| pkt_offset = pkt_pos; |
| |
| reset_packet_state(s); |
| while (avio_tell(s->pb) < data_end) { |
| |
| int i, ret, st_found; |
| |
| av_init_packet(&pkt); |
| pkt_offset = avio_tell(s->pb); |
| if ((ret = asf_read_packet(s, &pkt)) < 0) { |
| dts = AV_NOPTS_VALUE; |
| return ret; |
| } |
| // ASFPacket may contain fragments of packets belonging to different streams, |
| // pkt_offset is the offset of the first fragment within it. |
| if ((pkt_offset >= (pkt_pos + asf->packet_size))) |
| pkt_pos += asf->packet_size; |
| for (i = 0; i < asf->nb_streams; i++) { |
| ASFStream *st = asf->asf_st[i]; |
| |
| st_found = 0; |
| if (pkt.flags & AV_PKT_FLAG_KEY) { |
| dts = pkt.dts; |
| if (dts) { |
| av_add_index_entry(s->streams[pkt.stream_index], pkt_pos, |
| dts, pkt.size, 0, AVINDEX_KEYFRAME); |
| if (stream_index == st->index) { |
| st_found = 1; |
| break; |
| } |
| } |
| } |
| } |
| if (st_found) |
| break; |
| av_packet_unref(&pkt); |
| } |
| *pos = pkt_pos; |
| |
| av_packet_unref(&pkt); |
| return dts; |
| } |
| |
| static int asf_read_seek(AVFormatContext *s, int stream_index, |
| int64_t timestamp, int flags) |
| { |
| ASFContext *asf = s->priv_data; |
| int idx, ret; |
| |
| if (s->streams[stream_index]->nb_index_entries && asf->is_simple_index) { |
| idx = av_index_search_timestamp(s->streams[stream_index], timestamp, flags); |
| if (idx < 0 || idx >= s->streams[stream_index]->nb_index_entries) |
| return AVERROR_INVALIDDATA; |
| avio_seek(s->pb, s->streams[stream_index]->index_entries[idx].pos, SEEK_SET); |
| } else { |
| if ((ret = ff_seek_frame_binary(s, stream_index, timestamp, flags)) < 0) |
| return ret; |
| } |
| |
| reset_packet_state(s); |
| |
| return 0; |
| } |
| |
| static const GUIDParseTable *find_guid(ff_asf_guid guid) |
| { |
| int j, ret; |
| const GUIDParseTable *g; |
| |
| swap_guid(guid); |
| g = gdef; |
| for (j = 0; j < FF_ARRAY_ELEMS(gdef); j++) { |
| if (!(ret = memcmp(guid, g->guid, sizeof(g->guid)))) |
| return g; |
| g++; |
| } |
| |
| return NULL; |
| } |
| |
| static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| const GUIDParseTable *g = NULL; |
| ff_asf_guid guid; |
| int ret; |
| |
| while (avio_tell(pb) <= offset + size) { |
| if (avio_tell(pb) == asf->offset) |
| break; |
| asf->offset = avio_tell(pb); |
| if ((ret = ff_get_guid(pb, &guid)) < 0) |
| return ret; |
| g = find_guid(guid); |
| if (g) { |
| if ((ret = g->read_object(s, g)) < 0) |
| return ret; |
| } else { |
| GUIDParseTable g2; |
| |
| g2.name = "Unknown"; |
| g2.is_subobject = 1; |
| asf_read_unknown(s, &g2); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int asf_read_header(AVFormatContext *s) |
| { |
| ASFContext *asf = s->priv_data; |
| AVIOContext *pb = s->pb; |
| const GUIDParseTable *g = NULL; |
| ff_asf_guid guid; |
| int i, ret; |
| uint64_t size; |
| |
| asf->preroll = 0; |
| asf->is_simple_index = 0; |
| ff_get_guid(pb, &guid); |
| if (ff_guidcmp(&guid, &ff_asf_header)) |
| return AVERROR_INVALIDDATA; |
| avio_skip(pb, 8); // skip header object size |
| avio_skip(pb, 6); // skip number of header objects and 2 reserved bytes |
| asf->data_reached = 0; |
| |
| /* 1 is here instead of pb->eof_reached because (when not streaming), Data are skipped |
| * for the first time, |
| * Index object is processed and got eof and then seeking back to the Data is performed. |
| */ |
| while (1) { |
| // for the cases when object size is invalid |
| if (avio_tell(pb) == asf->offset) |
| break; |
| asf->offset = avio_tell(pb); |
| if ((ret = ff_get_guid(pb, &guid)) < 0) { |
| if (ret == AVERROR_EOF && asf->data_reached) |
| break; |
| else |
| goto failed; |
| } |
| g = find_guid(guid); |
| if (g) { |
| asf->unknown_offset = asf->offset; |
| asf->is_header = 1; |
| if ((ret = g->read_object(s, g)) < 0) |
| goto failed; |
| } else { |
| size = avio_rl64(pb); |
| align_position(pb, asf->offset, size); |
| } |
| if (asf->data_reached && (!pb->seekable || (asf->b_flags & ASF_FLAG_BROADCAST))) |
| break; |
| } |
| |
| if (!asf->data_reached) { |
| av_log(s, AV_LOG_ERROR, "Data Object was not found.\n"); |
| ret = AVERROR_INVALIDDATA; |
| goto failed; |
| } |
| if (pb->seekable) |
| avio_seek(pb, asf->first_packet_offset, SEEK_SET); |
| |
| for (i = 0; i < asf->nb_streams; i++) { |
| const char *rfc1766 = asf->asf_sd[asf->asf_st[i]->lang_idx].langs; |
| AVStream *st = s->streams[asf->asf_st[i]->index]; |
| set_language(s, rfc1766, &st->metadata); |
| } |
| |
| for (i = 0; i < ASF_MAX_STREAMS; i++) { |
| AVStream *st = NULL; |
| |
| st = find_stream(s, i); |
| if (st) { |
| av_dict_copy(&st->metadata, asf->asf_sd[i].asf_met, AV_DICT_IGNORE_SUFFIX); |
| if (asf->asf_sd[i].aspect_ratio.num > 0 && asf->asf_sd[i].aspect_ratio.den > 0) { |
| st->sample_aspect_ratio.num = asf->asf_sd[i].aspect_ratio.num; |
| st->sample_aspect_ratio.den = asf->asf_sd[i].aspect_ratio.den; |
| } |
| } |
| } |
| |
| return 0; |
| |
| failed: |
| asf_read_close(s); |
| return ret; |
| } |
| |
| AVInputFormat ff_asf_o_demuxer = { |
| .name = "asf_o", |
| .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"), |
| .priv_data_size = sizeof(ASFContext), |
| .read_probe = asf_probe, |
| .read_header = asf_read_header, |
| .read_packet = asf_read_packet, |
| .read_close = asf_read_close, |
| .read_timestamp = asf_read_timestamp, |
| .read_seek = asf_read_seek, |
| .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH, |
| }; |
