diff options
Diffstat (limited to 'libavformat/asfdec.c')
-rw-r--r-- | libavformat/asfdec.c | 1790 |
1 files changed, 0 insertions, 1790 deletions
diff --git a/libavformat/asfdec.c b/libavformat/asfdec.c deleted file mode 100644 index 7d71789029..0000000000 --- a/libavformat/asfdec.c +++ /dev/null @@ -1,1790 +0,0 @@ -/* - * Microsoft Advanced Streaming Format demuxer - * Copyright (c) 2014 Alexandra Hájková - * - * This file is part of Libav. - * - * Libav 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. - * - * Libav 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 Libav; 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/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 parameters - uint64_t sub_header_offset; // offset of subpayload 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; - 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 (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->codecpar->codec_type = asf_st->type = AVMEDIA_TYPE_VIDEO; - st->codecpar->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) -{ - ID3v2ExtraMeta *id3v2_extra_meta = NULL; - - ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta); - 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); - 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->codecpar->width = avio_rl32(pb); - st->codecpar->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); - st->codecpar->codec_tag = tag; - st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag); - - if (size > BMP_HEADER_SIZE) { - int ret; - st->codecpar->extradata_size = size - BMP_HEADER_SIZE; - if (!(st->codecpar->extradata = av_malloc(st->codecpar->extradata_size + - AV_INPUT_BUFFER_PADDING_SIZE))) { - st->codecpar->extradata_size = 0; - return AVERROR(ENOMEM); - } - memset(st->codecpar->extradata + st->codecpar->extradata_size , 0, - AV_INPUT_BUFFER_PADDING_SIZE); - if ((ret = avio_read(pb, st->codecpar->extradata, - st->codecpar->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->codecpar->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->codecpar, ts_data_len)) < 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->codecpar->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 }, - { "Bandwith Sharing Exclusive", { 0xAF, 0x60, 0x60, 0xAA, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 }, - { "Bandwith 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_demuxer = { - .name = "asf", - .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, -}; |