yading@11: /* yading@11: * ASF compatible demuxer yading@11: * Copyright (c) 2000, 2001 Fabrice Bellard yading@11: * yading@11: * This file is part of FFmpeg. yading@11: * yading@11: * FFmpeg is free software; you can redistribute it and/or yading@11: * modify it under the terms of the GNU Lesser General Public yading@11: * License as published by the Free Software Foundation; either yading@11: * version 2.1 of the License, or (at your option) any later version. yading@11: * yading@11: * FFmpeg is distributed in the hope that it will be useful, yading@11: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@11: * Lesser General Public License for more details. yading@11: * yading@11: * You should have received a copy of the GNU Lesser General Public yading@11: * License along with FFmpeg; if not, write to the Free Software yading@11: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@11: */ yading@11: yading@11: //#define DEBUG yading@11: yading@11: #include "libavutil/attributes.h" yading@11: #include "libavutil/avassert.h" yading@11: #include "libavutil/avstring.h" yading@11: #include "libavutil/bswap.h" yading@11: #include "libavutil/common.h" yading@11: #include "libavutil/dict.h" yading@11: #include "libavutil/mathematics.h" yading@11: #include "libavutil/opt.h" yading@11: #include "avformat.h" yading@11: #include "avio_internal.h" yading@11: #include "avlanguage.h" yading@11: #include "id3v2.h" yading@11: #include "internal.h" yading@11: #include "riff.h" yading@11: #include "asf.h" yading@11: #include "asfcrypt.h" yading@11: yading@11: typedef struct { yading@11: const AVClass *class; yading@11: int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID yading@11: ASFStream streams[128]; ///< it's max number and it's not that big yading@11: uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming) yading@11: AVRational dar[128]; yading@11: char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US) yading@11: /* non streamed additonnal info */ yading@11: /* packet filling */ yading@11: int packet_size_left; yading@11: /* only for reading */ yading@11: uint64_t data_offset; ///< beginning of the first data packet yading@11: uint64_t data_object_offset; ///< data object offset (excl. GUID & size) yading@11: uint64_t data_object_size; ///< size of the data object yading@11: int index_read; yading@11: yading@11: ASFMainHeader hdr; yading@11: yading@11: int packet_flags; yading@11: int packet_property; yading@11: int packet_timestamp; yading@11: int packet_segsizetype; yading@11: int packet_segments; yading@11: int packet_seq; yading@11: int packet_replic_size; yading@11: int packet_key_frame; yading@11: int packet_padsize; yading@11: unsigned int packet_frag_offset; yading@11: unsigned int packet_frag_size; yading@11: int64_t packet_frag_timestamp; yading@11: int packet_multi_size; yading@11: int packet_obj_size; yading@11: int packet_time_delta; yading@11: int packet_time_start; yading@11: int64_t packet_pos; yading@11: yading@11: int stream_index; yading@11: yading@11: ASFStream *asf_st; ///< currently decoded stream yading@11: yading@11: int no_resync_search; yading@11: } ASFContext; yading@11: yading@11: static const AVOption options[] = { yading@11: { "no_resync_search", "Don't try to resynchronize by looking for a certain optional start code", offsetof(ASFContext, no_resync_search), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM }, yading@11: { NULL }, yading@11: }; yading@11: yading@11: static const AVClass asf_class = { yading@11: .class_name = "asf demuxer", yading@11: .item_name = av_default_item_name, yading@11: .option = options, yading@11: .version = LIBAVUTIL_VERSION_INT, yading@11: }; yading@11: yading@11: #undef NDEBUG yading@11: #include yading@11: yading@11: #define ASF_MAX_STREAMS 127 yading@11: #define FRAME_HEADER_SIZE 16 yading@11: // Fix Me! FRAME_HEADER_SIZE may be different. (17 is known to be too large) yading@11: yading@11: #ifdef DEBUG yading@11: static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */ yading@11: 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2 yading@11: }; yading@11: yading@11: #define PRINT_IF_GUID(g, cmp) \ yading@11: if (!ff_guidcmp(g, &cmp)) \ yading@11: av_dlog(NULL, "(GUID: %s) ", # cmp) yading@11: yading@11: static void print_guid(ff_asf_guid *g) yading@11: { yading@11: int i; yading@11: PRINT_IF_GUID(g, ff_asf_header); yading@11: else PRINT_IF_GUID(g, ff_asf_file_header); yading@11: else PRINT_IF_GUID(g, ff_asf_stream_header); yading@11: else PRINT_IF_GUID(g, ff_asf_audio_stream); yading@11: else PRINT_IF_GUID(g, ff_asf_audio_conceal_none); yading@11: else PRINT_IF_GUID(g, ff_asf_video_stream); yading@11: else PRINT_IF_GUID(g, ff_asf_video_conceal_none); yading@11: else PRINT_IF_GUID(g, ff_asf_command_stream); yading@11: else PRINT_IF_GUID(g, ff_asf_comment_header); yading@11: else PRINT_IF_GUID(g, ff_asf_codec_comment_header); yading@11: else PRINT_IF_GUID(g, ff_asf_codec_comment1_header); yading@11: else PRINT_IF_GUID(g, ff_asf_data_header); yading@11: else PRINT_IF_GUID(g, ff_asf_simple_index_header); yading@11: else PRINT_IF_GUID(g, ff_asf_head1_guid); yading@11: else PRINT_IF_GUID(g, ff_asf_head2_guid); yading@11: else PRINT_IF_GUID(g, ff_asf_my_guid); yading@11: else PRINT_IF_GUID(g, ff_asf_ext_stream_header); yading@11: else PRINT_IF_GUID(g, ff_asf_extended_content_header); yading@11: else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header); yading@11: else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream); yading@11: else PRINT_IF_GUID(g, ff_asf_metadata_header); yading@11: else PRINT_IF_GUID(g, ff_asf_metadata_library_header); yading@11: else PRINT_IF_GUID(g, ff_asf_marker_header); yading@11: else PRINT_IF_GUID(g, stream_bitrate_guid); yading@11: else PRINT_IF_GUID(g, ff_asf_language_guid); yading@11: else yading@11: av_dlog(NULL, "(GUID: unknown) "); yading@11: for (i = 0; i < 16; i++) yading@11: av_dlog(NULL, " 0x%02x,", (*g)[i]); yading@11: av_dlog(NULL, "}\n"); yading@11: } yading@11: #undef PRINT_IF_GUID yading@11: #else yading@11: #define print_guid(g) yading@11: #endif yading@11: yading@11: static int asf_probe(AVProbeData *pd) yading@11: { yading@11: /* check file header */ yading@11: if (!ff_guidcmp(pd->buf, &ff_asf_header)) yading@11: return AVPROBE_SCORE_MAX; yading@11: else yading@11: return 0; yading@11: } yading@11: yading@11: /* size of type 2 (BOOL) is 32bit for "Extended Content Description Object" yading@11: * but 16 bit for "Metadata Object" and "Metadata Library Object" */ yading@11: static int get_value(AVIOContext *pb, int type, int type2_size) yading@11: { yading@11: switch (type) { yading@11: case 2: yading@11: return (type2_size == 32) ? avio_rl32(pb) : avio_rl16(pb); yading@11: case 3: yading@11: return avio_rl32(pb); yading@11: case 4: yading@11: return avio_rl64(pb); yading@11: case 5: yading@11: return avio_rl16(pb); yading@11: default: yading@11: return INT_MIN; yading@11: } yading@11: } yading@11: yading@11: /* MSDN claims that this should be "compatible with the ID3 frame, APIC", yading@11: * but in reality this is only loosely similar */ yading@11: static int asf_read_picture(AVFormatContext *s, int len) yading@11: { yading@11: AVPacket pkt = { 0 }; yading@11: const CodecMime *mime = ff_id3v2_mime_tags; yading@11: enum AVCodecID id = AV_CODEC_ID_NONE; yading@11: char mimetype[64]; yading@11: uint8_t *desc = NULL; yading@11: AVStream *st = NULL; yading@11: int ret, type, picsize, desc_len; yading@11: yading@11: /* type + picsize + mime + desc */ yading@11: if (len < 1 + 4 + 2 + 2) { yading@11: av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: yading@11: /* picture type */ yading@11: type = avio_r8(s->pb); yading@11: len--; yading@11: if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) { yading@11: av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type); yading@11: type = 0; yading@11: } yading@11: yading@11: /* picture data size */ yading@11: picsize = avio_rl32(s->pb); yading@11: len -= 4; yading@11: yading@11: /* picture MIME type */ yading@11: len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype)); yading@11: while (mime->id != AV_CODEC_ID_NONE) { yading@11: if (!strncmp(mime->str, mimetype, sizeof(mimetype))) { yading@11: id = mime->id; yading@11: break; yading@11: } yading@11: mime++; yading@11: } yading@11: if (id == AV_CODEC_ID_NONE) { yading@11: av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n", yading@11: mimetype); yading@11: return 0; yading@11: } yading@11: yading@11: if (picsize >= len) { yading@11: av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n", yading@11: picsize, len); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: yading@11: /* picture description */ yading@11: desc_len = (len - picsize) * 2 + 1; yading@11: desc = av_malloc(desc_len); yading@11: if (!desc) yading@11: return AVERROR(ENOMEM); yading@11: len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len); yading@11: yading@11: ret = av_get_packet(s->pb, &pkt, picsize); yading@11: if (ret < 0) yading@11: goto fail; yading@11: yading@11: st = avformat_new_stream(s, NULL); yading@11: if (!st) { yading@11: ret = AVERROR(ENOMEM); yading@11: goto fail; yading@11: } yading@11: st->disposition |= AV_DISPOSITION_ATTACHED_PIC; yading@11: st->codec->codec_type = AVMEDIA_TYPE_VIDEO; yading@11: st->codec->codec_id = id; yading@11: st->attached_pic = pkt; yading@11: st->attached_pic.stream_index = st->index; yading@11: st->attached_pic.flags |= AV_PKT_FLAG_KEY; yading@11: yading@11: if (*desc) yading@11: av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL); yading@11: else yading@11: av_freep(&desc); yading@11: yading@11: av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0); yading@11: yading@11: return 0; yading@11: yading@11: fail: yading@11: av_freep(&desc); yading@11: av_free_packet(&pkt); yading@11: return ret; yading@11: } yading@11: yading@11: static void get_id3_tag(AVFormatContext *s, int len) yading@11: { yading@11: ID3v2ExtraMeta *id3v2_extra_meta = NULL; yading@11: yading@11: ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta); yading@11: if (id3v2_extra_meta) yading@11: ff_id3v2_parse_apic(s, &id3v2_extra_meta); yading@11: ff_id3v2_free_extra_meta(&id3v2_extra_meta); yading@11: } yading@11: yading@11: static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size) yading@11: { yading@11: char *value; yading@11: int64_t off = avio_tell(s->pb); yading@11: #define LEN 22 yading@11: yading@11: if ((unsigned)len >= (UINT_MAX - LEN) / 2) yading@11: return; yading@11: yading@11: value = av_malloc(2 * len + LEN); yading@11: if (!value) yading@11: goto finish; yading@11: yading@11: if (type == 0) { // UTF16-LE yading@11: avio_get_str16le(s->pb, len, value, 2 * len + 1); yading@11: } else if (type == -1) { // ASCII yading@11: avio_read(s->pb, value, len); yading@11: value[len]=0; yading@11: } else if (type == 1) { // byte array yading@11: if (!strcmp(key, "WM/Picture")) { // handle cover art yading@11: asf_read_picture(s, len); yading@11: } else if (!strcmp(key, "ID3")) { // handle ID3 tag yading@11: get_id3_tag(s, len); yading@11: } else { yading@11: av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key); yading@11: } yading@11: goto finish; yading@11: } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD yading@11: uint64_t num = get_value(s->pb, type, type2_size); yading@11: snprintf(value, LEN, "%"PRIu64, num); yading@11: } else if (type == 6) { // (don't) handle GUID yading@11: av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key); yading@11: goto finish; yading@11: } else { yading@11: av_log(s, AV_LOG_DEBUG, yading@11: "Unsupported value type %d in tag %s.\n", type, key); yading@11: goto finish; yading@11: } yading@11: if (*value) yading@11: av_dict_set(&s->metadata, key, value, 0); yading@11: yading@11: finish: yading@11: av_freep(&value); yading@11: avio_seek(s->pb, off + len, SEEK_SET); yading@11: } yading@11: yading@11: static int asf_read_file_properties(AVFormatContext *s, int64_t size) yading@11: { yading@11: ASFContext *asf = s->priv_data; yading@11: AVIOContext *pb = s->pb; yading@11: yading@11: ff_get_guid(pb, &asf->hdr.guid); yading@11: asf->hdr.file_size = avio_rl64(pb); yading@11: asf->hdr.create_time = avio_rl64(pb); yading@11: avio_rl64(pb); /* number of packets */ yading@11: asf->hdr.play_time = avio_rl64(pb); yading@11: asf->hdr.send_time = avio_rl64(pb); yading@11: asf->hdr.preroll = avio_rl32(pb); yading@11: asf->hdr.ignore = avio_rl32(pb); yading@11: asf->hdr.flags = avio_rl32(pb); yading@11: asf->hdr.min_pktsize = avio_rl32(pb); yading@11: asf->hdr.max_pktsize = avio_rl32(pb); yading@11: if (asf->hdr.min_pktsize >= (1U << 29)) yading@11: return AVERROR_INVALIDDATA; yading@11: asf->hdr.max_bitrate = avio_rl32(pb); yading@11: s->packet_size = asf->hdr.max_pktsize; yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int asf_read_stream_properties(AVFormatContext *s, int64_t size) yading@11: { yading@11: ASFContext *asf = s->priv_data; yading@11: AVIOContext *pb = s->pb; yading@11: AVStream *st; yading@11: ASFStream *asf_st; yading@11: ff_asf_guid g; yading@11: enum AVMediaType type; yading@11: int type_specific_size, sizeX; yading@11: unsigned int tag1; yading@11: int64_t pos1, pos2, start_time; yading@11: int test_for_ext_stream_audio, is_dvr_ms_audio = 0; yading@11: yading@11: if (s->nb_streams == ASF_MAX_STREAMS) { yading@11: av_log(s, AV_LOG_ERROR, "too many streams\n"); yading@11: return AVERROR(EINVAL); yading@11: } yading@11: yading@11: pos1 = avio_tell(pb); yading@11: yading@11: st = avformat_new_stream(s, NULL); yading@11: if (!st) yading@11: return AVERROR(ENOMEM); yading@11: avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */ yading@11: asf_st = av_mallocz(sizeof(ASFStream)); yading@11: if (!asf_st) yading@11: return AVERROR(ENOMEM); yading@11: st->priv_data = asf_st; yading@11: start_time = asf->hdr.preroll; yading@11: yading@11: asf_st->stream_language_index = 128; // invalid stream index means no language info yading@11: yading@11: if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming... yading@11: int64_t fsize = avio_size(pb); yading@11: if (fsize <= 0 || (int64_t)asf->hdr.file_size <= 0 || FFABS(fsize - (int64_t)asf->hdr.file_size) < 10000) yading@11: st->duration = asf->hdr.play_time / yading@11: (10000000 / 1000) - start_time; yading@11: } yading@11: ff_get_guid(pb, &g); yading@11: yading@11: test_for_ext_stream_audio = 0; yading@11: if (!ff_guidcmp(&g, &ff_asf_audio_stream)) { yading@11: type = AVMEDIA_TYPE_AUDIO; yading@11: } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) { yading@11: type = AVMEDIA_TYPE_VIDEO; yading@11: } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) { yading@11: type = AVMEDIA_TYPE_VIDEO; yading@11: st->codec->codec_id = AV_CODEC_ID_MJPEG; yading@11: } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) { yading@11: type = AVMEDIA_TYPE_DATA; yading@11: } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) { yading@11: test_for_ext_stream_audio = 1; yading@11: type = AVMEDIA_TYPE_UNKNOWN; yading@11: } else { yading@11: return -1; yading@11: } yading@11: ff_get_guid(pb, &g); yading@11: avio_skip(pb, 8); /* total_size */ yading@11: type_specific_size = avio_rl32(pb); yading@11: avio_rl32(pb); yading@11: st->id = avio_rl16(pb) & 0x7f; /* stream id */ yading@11: // mapping of asf ID to AV stream ID; yading@11: asf->asfid2avid[st->id] = s->nb_streams - 1; yading@11: yading@11: avio_rl32(pb); yading@11: yading@11: if (test_for_ext_stream_audio) { yading@11: ff_get_guid(pb, &g); yading@11: if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) { yading@11: type = AVMEDIA_TYPE_AUDIO; yading@11: is_dvr_ms_audio = 1; yading@11: ff_get_guid(pb, &g); yading@11: avio_rl32(pb); yading@11: avio_rl32(pb); yading@11: avio_rl32(pb); yading@11: ff_get_guid(pb, &g); yading@11: avio_rl32(pb); yading@11: } yading@11: } yading@11: yading@11: st->codec->codec_type = type; yading@11: if (type == AVMEDIA_TYPE_AUDIO) { yading@11: int ret = ff_get_wav_header(pb, st->codec, type_specific_size); yading@11: if (ret < 0) yading@11: return ret; yading@11: if (is_dvr_ms_audio) { yading@11: // codec_id and codec_tag are unreliable in dvr_ms yading@11: // files. Set them later by probing stream. yading@11: st->request_probe = 1; yading@11: st->codec->codec_tag = 0; yading@11: } yading@11: if (st->codec->codec_id == AV_CODEC_ID_AAC) yading@11: st->need_parsing = AVSTREAM_PARSE_NONE; yading@11: else yading@11: st->need_parsing = AVSTREAM_PARSE_FULL; yading@11: /* We have to init the frame size at some point .... */ yading@11: pos2 = avio_tell(pb); yading@11: if (size >= (pos2 + 8 - pos1 + 24)) { yading@11: asf_st->ds_span = avio_r8(pb); yading@11: asf_st->ds_packet_size = avio_rl16(pb); yading@11: asf_st->ds_chunk_size = avio_rl16(pb); yading@11: avio_rl16(pb); // ds_data_size yading@11: avio_r8(pb); // ds_silence_data yading@11: } yading@11: if (asf_st->ds_span > 1) { yading@11: if (!asf_st->ds_chunk_size || yading@11: (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) || yading@11: asf_st->ds_packet_size % asf_st->ds_chunk_size) yading@11: asf_st->ds_span = 0; // disable descrambling yading@11: } yading@11: } else if (type == AVMEDIA_TYPE_VIDEO && yading@11: size - (avio_tell(pb) - pos1 + 24) >= 51) { yading@11: avio_rl32(pb); yading@11: avio_rl32(pb); yading@11: avio_r8(pb); yading@11: avio_rl16(pb); /* size */ yading@11: sizeX = avio_rl32(pb); /* size */ yading@11: st->codec->width = avio_rl32(pb); yading@11: st->codec->height = avio_rl32(pb); yading@11: /* not available for asf */ yading@11: avio_rl16(pb); /* panes */ yading@11: st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */ yading@11: tag1 = avio_rl32(pb); yading@11: avio_skip(pb, 20); yading@11: if (sizeX > 40) { yading@11: st->codec->extradata_size = ffio_limit(pb, sizeX - 40); yading@11: st->codec->extradata = av_mallocz(st->codec->extradata_size + yading@11: FF_INPUT_BUFFER_PADDING_SIZE); yading@11: avio_read(pb, st->codec->extradata, st->codec->extradata_size); yading@11: } yading@11: yading@11: /* Extract palette from extradata if bpp <= 8 */ yading@11: /* This code assumes that extradata contains only palette */ yading@11: /* This is true for all paletted codecs implemented in libavcodec */ yading@11: if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) { yading@11: #if HAVE_BIGENDIAN yading@11: int i; yading@11: for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE) / 4; i++) yading@11: asf_st->palette[i] = av_bswap32(((uint32_t *)st->codec->extradata)[i]); yading@11: #else yading@11: memcpy(asf_st->palette, st->codec->extradata, yading@11: FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)); yading@11: #endif yading@11: asf_st->palette_changed = 1; yading@11: } yading@11: yading@11: st->codec->codec_tag = tag1; yading@11: st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1); yading@11: if (tag1 == MKTAG('D', 'V', 'R', ' ')) { yading@11: st->need_parsing = AVSTREAM_PARSE_FULL; yading@11: /* issue658 contains wrong w/h and MS even puts a fake seq header yading@11: * with wrong w/h in extradata while a correct one is in the stream. yading@11: * maximum lameness */ yading@11: st->codec->width = yading@11: st->codec->height = 0; yading@11: av_freep(&st->codec->extradata); yading@11: st->codec->extradata_size = 0; yading@11: } yading@11: if (st->codec->codec_id == AV_CODEC_ID_H264) yading@11: st->need_parsing = AVSTREAM_PARSE_FULL_ONCE; yading@11: } yading@11: pos2 = avio_tell(pb); yading@11: avio_skip(pb, size - (pos2 - pos1 + 24)); yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size) yading@11: { yading@11: ASFContext *asf = s->priv_data; yading@11: AVIOContext *pb = s->pb; yading@11: ff_asf_guid g; yading@11: int ext_len, payload_ext_ct, stream_ct, i; yading@11: uint32_t leak_rate, stream_num; yading@11: unsigned int stream_languageid_index; yading@11: yading@11: avio_rl64(pb); // starttime yading@11: avio_rl64(pb); // endtime yading@11: leak_rate = avio_rl32(pb); // leak-datarate yading@11: avio_rl32(pb); // bucket-datasize yading@11: avio_rl32(pb); // init-bucket-fullness yading@11: avio_rl32(pb); // alt-leak-datarate yading@11: avio_rl32(pb); // alt-bucket-datasize yading@11: avio_rl32(pb); // alt-init-bucket-fullness yading@11: avio_rl32(pb); // max-object-size yading@11: avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved) yading@11: stream_num = avio_rl16(pb); // stream-num yading@11: yading@11: stream_languageid_index = avio_rl16(pb); // stream-language-id-index yading@11: if (stream_num < 128) yading@11: asf->streams[stream_num].stream_language_index = stream_languageid_index; yading@11: yading@11: avio_rl64(pb); // avg frametime in 100ns units yading@11: stream_ct = avio_rl16(pb); // stream-name-count yading@11: payload_ext_ct = avio_rl16(pb); // payload-extension-system-count yading@11: yading@11: if (stream_num < 128) { yading@11: asf->stream_bitrates[stream_num] = leak_rate; yading@11: asf->streams[stream_num].payload_ext_ct = 0; yading@11: } yading@11: yading@11: for (i = 0; i < stream_ct; i++) { yading@11: avio_rl16(pb); yading@11: ext_len = avio_rl16(pb); yading@11: avio_skip(pb, ext_len); yading@11: } yading@11: yading@11: for (i = 0; i < payload_ext_ct; i++) { yading@11: int size; yading@11: ff_get_guid(pb, &g); yading@11: size = avio_rl16(pb); yading@11: ext_len = avio_rl32(pb); yading@11: avio_skip(pb, ext_len); yading@11: if (stream_num < 128 && i < FF_ARRAY_ELEMS(asf->streams[stream_num].payload)) { yading@11: ASFPayload *p = &asf->streams[stream_num].payload[i]; yading@11: p->type = g[0]; yading@11: p->size = size; yading@11: av_log(s, AV_LOG_DEBUG, "Payload extension %x %d\n", g[0], p->size ); yading@11: asf->streams[stream_num].payload_ext_ct ++; yading@11: } yading@11: } yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int asf_read_content_desc(AVFormatContext *s, int64_t size) yading@11: { yading@11: AVIOContext *pb = s->pb; yading@11: int len1, len2, len3, len4, len5; yading@11: yading@11: len1 = avio_rl16(pb); yading@11: len2 = avio_rl16(pb); yading@11: len3 = avio_rl16(pb); yading@11: len4 = avio_rl16(pb); yading@11: len5 = avio_rl16(pb); yading@11: get_tag(s, "title", 0, len1, 32); yading@11: get_tag(s, "author", 0, len2, 32); yading@11: get_tag(s, "copyright", 0, len3, 32); yading@11: get_tag(s, "comment", 0, len4, 32); yading@11: avio_skip(pb, len5); yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size) yading@11: { yading@11: AVIOContext *pb = s->pb; yading@11: ASFContext *asf = s->priv_data; yading@11: int desc_count, i, ret; yading@11: yading@11: desc_count = avio_rl16(pb); yading@11: for (i = 0; i < desc_count; i++) { yading@11: int name_len, value_type, value_len; yading@11: char name[1024]; yading@11: yading@11: name_len = avio_rl16(pb); yading@11: if (name_len % 2) // must be even, broken lavf versions wrote len-1 yading@11: name_len += 1; yading@11: if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len) yading@11: avio_skip(pb, name_len - ret); yading@11: value_type = avio_rl16(pb); yading@11: value_len = avio_rl16(pb); yading@11: if (!value_type && value_len % 2) yading@11: value_len += 1; yading@11: /* My sample has that stream set to 0 maybe that mean the container. yading@11: * ASF stream count starts at 1. I am using 0 to the container value yading@11: * since it's unused. */ yading@11: if (!strcmp(name, "AspectRatioX")) yading@11: asf->dar[0].num = get_value(s->pb, value_type, 32); yading@11: else if (!strcmp(name, "AspectRatioY")) yading@11: asf->dar[0].den = get_value(s->pb, value_type, 32); yading@11: else yading@11: get_tag(s, name, value_type, value_len, 32); yading@11: } yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int asf_read_language_list(AVFormatContext *s, int64_t size) yading@11: { yading@11: AVIOContext *pb = s->pb; yading@11: ASFContext *asf = s->priv_data; yading@11: int j, ret; yading@11: int stream_count = avio_rl16(pb); yading@11: for (j = 0; j < stream_count; j++) { yading@11: char lang[6]; yading@11: unsigned int lang_len = avio_r8(pb); yading@11: if ((ret = avio_get_str16le(pb, lang_len, lang, yading@11: sizeof(lang))) < lang_len) yading@11: avio_skip(pb, lang_len - ret); yading@11: if (j < 128) yading@11: av_strlcpy(asf->stream_languages[j], lang, yading@11: sizeof(*asf->stream_languages)); yading@11: } yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int asf_read_metadata(AVFormatContext *s, int64_t size) yading@11: { yading@11: AVIOContext *pb = s->pb; yading@11: ASFContext *asf = s->priv_data; yading@11: int n, stream_num, name_len, value_len; yading@11: int ret, i; yading@11: n = avio_rl16(pb); yading@11: yading@11: for (i = 0; i < n; i++) { yading@11: char name[1024]; yading@11: int value_type; yading@11: yading@11: avio_rl16(pb); // lang_list_index yading@11: stream_num = avio_rl16(pb); yading@11: name_len = avio_rl16(pb); yading@11: value_type = avio_rl16(pb); /* value_type */ yading@11: value_len = avio_rl32(pb); yading@11: yading@11: if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len) yading@11: avio_skip(pb, name_len - ret); yading@11: av_dlog(s, "%d stream %d name_len %2d type %d len %4d <%s>\n", yading@11: i, stream_num, name_len, value_type, value_len, name); yading@11: yading@11: if (!strcmp(name, "AspectRatioX")){ yading@11: int aspect_x = get_value(s->pb, value_type, 16); yading@11: if(stream_num < 128) yading@11: asf->dar[stream_num].num = aspect_x; yading@11: } else if(!strcmp(name, "AspectRatioY")){ yading@11: int aspect_y = get_value(s->pb, value_type, 16); yading@11: if(stream_num < 128) yading@11: asf->dar[stream_num].den = aspect_y; yading@11: } else { yading@11: get_tag(s, name, value_type, value_len, 16); yading@11: } yading@11: } yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int asf_read_marker(AVFormatContext *s, int64_t size) yading@11: { yading@11: AVIOContext *pb = s->pb; yading@11: int i, count, name_len, ret; yading@11: char name[1024]; yading@11: yading@11: avio_rl64(pb); // reserved 16 bytes yading@11: avio_rl64(pb); // ... yading@11: count = avio_rl32(pb); // markers count yading@11: avio_rl16(pb); // reserved 2 bytes yading@11: name_len = avio_rl16(pb); // name length yading@11: for (i = 0; i < name_len; i++) yading@11: avio_r8(pb); // skip the name yading@11: yading@11: for (i = 0; i < count; i++) { yading@11: int64_t pres_time; yading@11: int name_len; yading@11: yading@11: avio_rl64(pb); // offset, 8 bytes yading@11: pres_time = avio_rl64(pb); // presentation time yading@11: avio_rl16(pb); // entry length yading@11: avio_rl32(pb); // send time yading@11: avio_rl32(pb); // flags yading@11: name_len = avio_rl32(pb); // name length yading@11: if ((ret = avio_get_str16le(pb, name_len * 2, name, yading@11: sizeof(name))) < name_len) yading@11: avio_skip(pb, name_len - ret); yading@11: avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time, yading@11: AV_NOPTS_VALUE, name); yading@11: } yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int asf_read_header(AVFormatContext *s) yading@11: { yading@11: ASFContext *asf = s->priv_data; yading@11: ff_asf_guid g; yading@11: AVIOContext *pb = s->pb; yading@11: int i; yading@11: int64_t gsize; yading@11: yading@11: ff_get_guid(pb, &g); yading@11: if (ff_guidcmp(&g, &ff_asf_header)) yading@11: return AVERROR_INVALIDDATA; yading@11: avio_rl64(pb); yading@11: avio_rl32(pb); yading@11: avio_r8(pb); yading@11: avio_r8(pb); yading@11: memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid)); yading@11: for (;;) { yading@11: uint64_t gpos = avio_tell(pb); yading@11: ff_get_guid(pb, &g); yading@11: gsize = avio_rl64(pb); yading@11: print_guid(&g); yading@11: if (!ff_guidcmp(&g, &ff_asf_data_header)) { yading@11: asf->data_object_offset = avio_tell(pb); yading@11: /* If not streaming, gsize is not unlimited (how?), yading@11: * and there is enough space in the file.. */ yading@11: if (!(asf->hdr.flags & 0x01) && gsize >= 100) yading@11: asf->data_object_size = gsize - 24; yading@11: else yading@11: asf->data_object_size = (uint64_t)-1; yading@11: break; yading@11: } yading@11: if (gsize < 24) yading@11: return AVERROR_INVALIDDATA; yading@11: if (!ff_guidcmp(&g, &ff_asf_file_header)) { yading@11: int ret = asf_read_file_properties(s, gsize); yading@11: if (ret < 0) yading@11: return ret; yading@11: } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) { yading@11: asf_read_stream_properties(s, gsize); yading@11: } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) { yading@11: asf_read_content_desc(s, gsize); yading@11: } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) { yading@11: asf_read_language_list(s, gsize); yading@11: } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) { yading@11: asf_read_ext_content_desc(s, gsize); yading@11: } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) { yading@11: asf_read_metadata(s, gsize); yading@11: } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) { yading@11: asf_read_metadata(s, gsize); yading@11: } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) { yading@11: asf_read_ext_stream_properties(s, gsize); yading@11: yading@11: // there could be a optional stream properties object to follow yading@11: // if so the next iteration will pick it up yading@11: continue; yading@11: } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) { yading@11: ff_get_guid(pb, &g); yading@11: avio_skip(pb, 6); yading@11: continue; yading@11: } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) { yading@11: asf_read_marker(s, gsize); yading@11: } else if (url_feof(pb)) { yading@11: return AVERROR_EOF; yading@11: } else { yading@11: if (!s->keylen) { yading@11: if (!ff_guidcmp(&g, &ff_asf_content_encryption)) { yading@11: unsigned int len; yading@11: AVPacket pkt; yading@11: av_log(s, AV_LOG_WARNING, yading@11: "DRM protected stream detected, decoding will likely fail!\n"); yading@11: len= avio_rl32(pb); yading@11: av_log(s, AV_LOG_DEBUG, "Secret data:\n"); yading@11: av_get_packet(pb, &pkt, len); av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size); av_free_packet(&pkt); yading@11: len= avio_rl32(pb); yading@11: get_tag(s, "ASF_Protection_Type", -1, len, 32); yading@11: len= avio_rl32(pb); yading@11: get_tag(s, "ASF_Key_ID", -1, len, 32); yading@11: len= avio_rl32(pb); yading@11: get_tag(s, "ASF_License_URL", -1, len, 32); yading@11: } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) { yading@11: av_log(s, AV_LOG_WARNING, yading@11: "Ext DRM protected stream detected, decoding will likely fail!\n"); yading@11: av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0); yading@11: } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) { yading@11: av_log(s, AV_LOG_INFO, "Digital signature detected!\n"); yading@11: } yading@11: } yading@11: } yading@11: if (avio_tell(pb) != gpos + gsize) yading@11: av_log(s, AV_LOG_DEBUG, yading@11: "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n", yading@11: avio_tell(pb) - gpos, gsize); yading@11: avio_seek(pb, gpos + gsize, SEEK_SET); yading@11: } yading@11: ff_get_guid(pb, &g); yading@11: avio_rl64(pb); yading@11: avio_r8(pb); yading@11: avio_r8(pb); yading@11: if (url_feof(pb)) yading@11: return AVERROR_EOF; yading@11: asf->data_offset = avio_tell(pb); yading@11: asf->packet_size_left = 0; yading@11: yading@11: for (i = 0; i < 128; i++) { yading@11: int stream_num = asf->asfid2avid[i]; yading@11: if (stream_num >= 0) { yading@11: AVStream *st = s->streams[stream_num]; yading@11: if (!st->codec->bit_rate) yading@11: st->codec->bit_rate = asf->stream_bitrates[i]; yading@11: if (asf->dar[i].num > 0 && asf->dar[i].den > 0) { yading@11: av_reduce(&st->sample_aspect_ratio.num, yading@11: &st->sample_aspect_ratio.den, yading@11: asf->dar[i].num, asf->dar[i].den, INT_MAX); yading@11: } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) && yading@11: // Use ASF container value if the stream doesn't set AR. yading@11: (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)) yading@11: av_reduce(&st->sample_aspect_ratio.num, yading@11: &st->sample_aspect_ratio.den, yading@11: asf->dar[0].num, asf->dar[0].den, INT_MAX); yading@11: yading@11: av_dlog(s, "i=%d, st->codec->codec_type:%d, asf->dar %d:%d sar=%d:%d\n", yading@11: i, st->codec->codec_type, asf->dar[i].num, asf->dar[i].den, yading@11: st->sample_aspect_ratio.num, st->sample_aspect_ratio.den); yading@11: yading@11: // copy and convert language codes to the frontend yading@11: if (asf->streams[i].stream_language_index < 128) { yading@11: const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index]; yading@11: if (rfc1766 && strlen(rfc1766) > 1) { yading@11: const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any yading@11: const char *iso6392 = av_convert_lang_to(primary_tag, yading@11: AV_LANG_ISO639_2_BIBL); yading@11: if (iso6392) yading@11: av_dict_set(&st->metadata, "language", iso6392, 0); yading@11: } yading@11: } yading@11: } yading@11: } yading@11: yading@11: ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv); yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: #define DO_2BITS(bits, var, defval) \ yading@11: switch (bits & 3) { \ yading@11: case 3: \ yading@11: var = avio_rl32(pb); \ yading@11: rsize += 4; \ yading@11: break; \ yading@11: case 2: \ yading@11: var = avio_rl16(pb); \ yading@11: rsize += 2; \ yading@11: break; \ yading@11: case 1: \ yading@11: var = avio_r8(pb); \ yading@11: rsize++; \ yading@11: break; \ yading@11: default: \ yading@11: var = defval; \ yading@11: break; \ yading@11: } yading@11: yading@11: /** yading@11: * Load a single ASF packet into the demuxer. yading@11: * @param s demux context yading@11: * @param pb context to read data from yading@11: * @return 0 on success, <0 on error yading@11: */ yading@11: static int ff_asf_get_packet(AVFormatContext *s, AVIOContext *pb) yading@11: { yading@11: ASFContext *asf = s->priv_data; yading@11: uint32_t packet_length, padsize; yading@11: int rsize = 8; yading@11: int c, d, e, off; yading@11: yading@11: // if we do not know packet size, allow skipping up to 32 kB yading@11: off = 32768; yading@11: if (asf->no_resync_search) yading@11: off = 3; yading@11: else if (s->packet_size > 0) yading@11: off = (avio_tell(pb) - s->data_offset) % s->packet_size + 3; yading@11: yading@11: c = d = e = -1; yading@11: while (off-- > 0) { yading@11: c = d; yading@11: d = e; yading@11: e = avio_r8(pb); yading@11: if (c == 0x82 && !d && !e) yading@11: break; yading@11: } yading@11: yading@11: if (c != 0x82) { yading@11: /* This code allows handling of -EAGAIN at packet boundaries (i.e. yading@11: * if the packet sync code above triggers -EAGAIN). This does not yading@11: * imply complete -EAGAIN handling support at random positions in yading@11: * the stream. */ yading@11: if (pb->error == AVERROR(EAGAIN)) yading@11: return AVERROR(EAGAIN); yading@11: if (!url_feof(pb)) yading@11: av_log(s, AV_LOG_ERROR, yading@11: "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb)); yading@11: } yading@11: if ((c & 0x8f) == 0x82) { yading@11: if (d || e) { yading@11: if (!url_feof(pb)) yading@11: av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n"); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: c = avio_r8(pb); yading@11: d = avio_r8(pb); yading@11: rsize += 3; yading@11: } else if(!url_feof(pb)) { yading@11: avio_seek(pb, -1, SEEK_CUR); // FIXME yading@11: } yading@11: yading@11: asf->packet_flags = c; yading@11: asf->packet_property = d; yading@11: yading@11: DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size); yading@11: DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored yading@11: DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length yading@11: yading@11: // the following checks prevent overflows and infinite loops yading@11: if (!packet_length || packet_length >= (1U << 29)) { yading@11: av_log(s, AV_LOG_ERROR, yading@11: "invalid packet_length %d at:%"PRId64"\n", yading@11: packet_length, avio_tell(pb)); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: if (padsize >= packet_length) { yading@11: av_log(s, AV_LOG_ERROR, yading@11: "invalid padsize %d at:%"PRId64"\n", padsize, avio_tell(pb)); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: yading@11: asf->packet_timestamp = avio_rl32(pb); yading@11: avio_rl16(pb); /* duration */ yading@11: // rsize has at least 11 bytes which have to be present yading@11: yading@11: if (asf->packet_flags & 0x01) { yading@11: asf->packet_segsizetype = avio_r8(pb); yading@11: rsize++; yading@11: asf->packet_segments = asf->packet_segsizetype & 0x3f; yading@11: } else { yading@11: asf->packet_segments = 1; yading@11: asf->packet_segsizetype = 0x80; yading@11: } yading@11: if (rsize > packet_length - padsize) { yading@11: asf->packet_size_left = 0; yading@11: av_log(s, AV_LOG_ERROR, yading@11: "invalid packet header length %d for pktlen %d-%d at %"PRId64"\n", yading@11: rsize, packet_length, padsize, avio_tell(pb)); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: asf->packet_size_left = packet_length - padsize - rsize; yading@11: if (packet_length < asf->hdr.min_pktsize) yading@11: padsize += asf->hdr.min_pktsize - packet_length; yading@11: asf->packet_padsize = padsize; yading@11: av_dlog(s, "packet: size=%d padsize=%d left=%d\n", yading@11: s->packet_size, asf->packet_padsize, asf->packet_size_left); yading@11: return 0; yading@11: } yading@11: yading@11: /** yading@11: * yading@11: * @return <0 if error yading@11: */ yading@11: static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb) yading@11: { yading@11: ASFContext *asf = s->priv_data; yading@11: ASFStream *asfst; yading@11: int rsize = 1; yading@11: int num = avio_r8(pb); yading@11: int i; yading@11: int64_t ts0, ts1 av_unused; yading@11: yading@11: asf->packet_segments--; yading@11: asf->packet_key_frame = num >> 7; yading@11: asf->stream_index = asf->asfid2avid[num & 0x7f]; yading@11: asfst = &asf->streams[num & 0x7f]; yading@11: // sequence should be ignored! yading@11: DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0); yading@11: DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0); yading@11: DO_2BITS(asf->packet_property, asf->packet_replic_size, 0); yading@11: av_dlog(asf, "key:%d stream:%d seq:%d offset:%d replic_size:%d\n", yading@11: asf->packet_key_frame, asf->stream_index, asf->packet_seq, yading@11: asf->packet_frag_offset, asf->packet_replic_size); yading@11: if (rsize+(int64_t)asf->packet_replic_size > asf->packet_size_left) { yading@11: av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: if (asf->packet_replic_size >= 8) { yading@11: int64_t end = avio_tell(pb) + asf->packet_replic_size; yading@11: AVRational aspect; yading@11: asf->packet_obj_size = avio_rl32(pb); yading@11: if (asf->packet_obj_size >= (1 << 24) || asf->packet_obj_size <= 0) { yading@11: av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n"); yading@11: asf->packet_obj_size = 0; yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: asf->packet_frag_timestamp = avio_rl32(pb); // timestamp yading@11: yading@11: for (i = 0; i < asfst->payload_ext_ct; i++) { yading@11: ASFPayload *p = &asfst->payload[i]; yading@11: int size = p->size; yading@11: int64_t payend; yading@11: if (size == 0xFFFF) yading@11: size = avio_rl16(pb); yading@11: payend = avio_tell(pb) + size; yading@11: if (payend > end) { yading@11: av_log(s, AV_LOG_ERROR, "too long payload\n"); yading@11: break; yading@11: } yading@11: switch (p->type) { yading@11: case 0x50: yading@11: // duration = avio_rl16(pb); yading@11: break; yading@11: case 0x54: yading@11: aspect.num = avio_r8(pb); yading@11: aspect.den = avio_r8(pb); yading@11: if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) { yading@11: s->streams[asf->stream_index]->sample_aspect_ratio = aspect; yading@11: } yading@11: break; yading@11: case 0x2A: yading@11: avio_skip(pb, 8); yading@11: ts0 = avio_rl64(pb); yading@11: ts1 = avio_rl64(pb); yading@11: if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000; yading@11: else asf->packet_frag_timestamp = AV_NOPTS_VALUE; yading@11: break; yading@11: case 0x5B: yading@11: case 0xB7: yading@11: case 0xCC: yading@11: case 0xC0: yading@11: case 0xA0: yading@11: //unknown yading@11: break; yading@11: } yading@11: avio_seek(pb, payend, SEEK_SET); yading@11: } yading@11: yading@11: avio_seek(pb, end, SEEK_SET); yading@11: rsize += asf->packet_replic_size; // FIXME - check validity yading@11: } else if (asf->packet_replic_size == 1) { yading@11: // multipacket - frag_offset is beginning timestamp yading@11: asf->packet_time_start = asf->packet_frag_offset; yading@11: asf->packet_frag_offset = 0; yading@11: asf->packet_frag_timestamp = asf->packet_timestamp; yading@11: yading@11: asf->packet_time_delta = avio_r8(pb); yading@11: rsize++; yading@11: } else if (asf->packet_replic_size != 0) { yading@11: av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", yading@11: asf->packet_replic_size); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: if (asf->packet_flags & 0x01) { yading@11: DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal yading@11: if (rsize > asf->packet_size_left) { yading@11: av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n"); yading@11: return AVERROR_INVALIDDATA; yading@11: } else if (asf->packet_frag_size > asf->packet_size_left - rsize) { yading@11: if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) { yading@11: av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n", yading@11: asf->packet_size_left, rsize); yading@11: return AVERROR_INVALIDDATA; yading@11: } else { yading@11: int diff = asf->packet_frag_size - (asf->packet_size_left - rsize); yading@11: asf->packet_size_left += diff; yading@11: asf->packet_padsize -= diff; yading@11: } yading@11: } yading@11: } else { yading@11: asf->packet_frag_size = asf->packet_size_left - rsize; yading@11: } yading@11: if (asf->packet_replic_size == 1) { yading@11: asf->packet_multi_size = asf->packet_frag_size; yading@11: if (asf->packet_multi_size > asf->packet_size_left) yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: asf->packet_size_left -= rsize; yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: /** yading@11: * Parse data from individual ASF packets (which were previously loaded yading@11: * with asf_get_packet()). yading@11: * @param s demux context yading@11: * @param pb context to read data from yading@11: * @param pkt pointer to store packet data into yading@11: * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF yading@11: * packets need to be loaded (through asf_get_packet()) yading@11: */ yading@11: static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt) yading@11: { yading@11: ASFContext *asf = s->priv_data; yading@11: ASFStream *asf_st = 0; yading@11: for (;;) { yading@11: int ret; yading@11: if (url_feof(pb)) yading@11: return AVERROR_EOF; yading@11: yading@11: if (asf->packet_size_left < FRAME_HEADER_SIZE || yading@11: asf->packet_segments < 1) { yading@11: int ret = asf->packet_size_left + asf->packet_padsize; yading@11: yading@11: assert(ret >= 0); yading@11: /* fail safe */ yading@11: avio_skip(pb, ret); yading@11: yading@11: asf->packet_pos = avio_tell(pb); yading@11: if (asf->data_object_size != (uint64_t)-1 && yading@11: (asf->packet_pos - asf->data_object_offset >= asf->data_object_size)) yading@11: return AVERROR_EOF; /* Do not exceed the size of the data object */ yading@11: return 1; yading@11: } yading@11: if (asf->packet_time_start == 0) { yading@11: if (asf_read_frame_header(s, pb) < 0) { yading@11: asf->packet_segments = 0; yading@11: continue; yading@11: } yading@11: if (asf->stream_index < 0 || yading@11: s->streams[asf->stream_index]->discard >= AVDISCARD_ALL || yading@11: (!asf->packet_key_frame && yading@11: s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)) { yading@11: asf->packet_time_start = 0; yading@11: /* unhandled packet (should not happen) */ yading@11: avio_skip(pb, asf->packet_frag_size); yading@11: asf->packet_size_left -= asf->packet_frag_size; yading@11: if (asf->stream_index < 0) yading@11: av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", yading@11: asf->packet_frag_size); yading@11: continue; yading@11: } yading@11: asf->asf_st = s->streams[asf->stream_index]->priv_data; yading@11: } yading@11: asf_st = asf->asf_st; yading@11: av_assert0(asf_st); yading@11: yading@11: if (asf->packet_replic_size == 1) { yading@11: // frag_offset is here used as the beginning timestamp yading@11: asf->packet_frag_timestamp = asf->packet_time_start; yading@11: asf->packet_time_start += asf->packet_time_delta; yading@11: asf->packet_obj_size = asf->packet_frag_size = avio_r8(pb); yading@11: asf->packet_size_left--; yading@11: asf->packet_multi_size--; yading@11: if (asf->packet_multi_size < asf->packet_obj_size) { yading@11: asf->packet_time_start = 0; yading@11: avio_skip(pb, asf->packet_multi_size); yading@11: asf->packet_size_left -= asf->packet_multi_size; yading@11: continue; yading@11: } yading@11: asf->packet_multi_size -= asf->packet_obj_size; yading@11: } yading@11: if (asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size && yading@11: asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size) { yading@11: av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n", yading@11: asf_st->frag_offset, asf->packet_frag_size, yading@11: asf->packet_obj_size, asf_st->pkt.size); yading@11: asf->packet_obj_size = asf_st->pkt.size; yading@11: } yading@11: yading@11: if (asf_st->pkt.size != asf->packet_obj_size || yading@11: // FIXME is this condition sufficient? yading@11: asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { yading@11: if (asf_st->pkt.data) { yading@11: av_log(s, AV_LOG_INFO, yading@11: "freeing incomplete packet size %d, new %d\n", yading@11: asf_st->pkt.size, asf->packet_obj_size); yading@11: asf_st->frag_offset = 0; yading@11: av_free_packet(&asf_st->pkt); yading@11: } yading@11: /* new packet */ yading@11: av_new_packet(&asf_st->pkt, asf->packet_obj_size); yading@11: asf_st->seq = asf->packet_seq; yading@11: asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll; yading@11: asf_st->pkt.stream_index = asf->stream_index; yading@11: asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos; yading@11: yading@11: if (asf_st->pkt.data && asf_st->palette_changed) { yading@11: uint8_t *pal; yading@11: pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE, yading@11: AVPALETTE_SIZE); yading@11: if (!pal) { yading@11: av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n"); yading@11: } else { yading@11: memcpy(pal, asf_st->palette, AVPALETTE_SIZE); yading@11: asf_st->palette_changed = 0; yading@11: } yading@11: } yading@11: av_dlog(asf, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n", yading@11: asf->stream_index, asf->packet_key_frame, yading@11: asf_st->pkt.flags & AV_PKT_FLAG_KEY, yading@11: s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, yading@11: asf->packet_obj_size); yading@11: if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO) yading@11: asf->packet_key_frame = 1; yading@11: if (asf->packet_key_frame) yading@11: asf_st->pkt.flags |= AV_PKT_FLAG_KEY; yading@11: } yading@11: yading@11: /* read data */ yading@11: av_dlog(asf, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n", yading@11: s->packet_size, asf_st->pkt.size, asf->packet_frag_offset, yading@11: asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data); yading@11: asf->packet_size_left -= asf->packet_frag_size; yading@11: if (asf->packet_size_left < 0) yading@11: continue; yading@11: yading@11: if (asf->packet_frag_offset >= asf_st->pkt.size || yading@11: asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) { yading@11: av_log(s, AV_LOG_ERROR, yading@11: "packet fragment position invalid %u,%u not in %u\n", yading@11: asf->packet_frag_offset, asf->packet_frag_size, yading@11: asf_st->pkt.size); yading@11: continue; yading@11: } yading@11: yading@11: ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset, yading@11: asf->packet_frag_size); yading@11: if (ret != asf->packet_frag_size) { yading@11: if (ret < 0 || asf->packet_frag_offset + ret == 0) yading@11: return ret < 0 ? ret : AVERROR_EOF; yading@11: yading@11: if (asf_st->ds_span > 1) { yading@11: // scrambling, we can either drop it completely or fill the remainder yading@11: // TODO: should we fill the whole packet instead of just the current yading@11: // fragment? yading@11: memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0, yading@11: asf->packet_frag_size - ret); yading@11: ret = asf->packet_frag_size; yading@11: } else { yading@11: // no scrambling, so we can return partial packets yading@11: av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret); yading@11: } yading@11: } yading@11: if (s->key && s->keylen == 20) yading@11: ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset, yading@11: ret); yading@11: asf_st->frag_offset += ret; yading@11: /* test if whole packet is read */ yading@11: if (asf_st->frag_offset == asf_st->pkt.size) { yading@11: // workaround for macroshit radio DVR-MS files yading@11: if (s->streams[asf->stream_index]->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO && yading@11: asf_st->pkt.size > 100) { yading@11: int i; yading@11: for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++) yading@11: ; yading@11: if (i == asf_st->pkt.size) { yading@11: av_log(s, AV_LOG_DEBUG, "discarding ms fart\n"); yading@11: asf_st->frag_offset = 0; yading@11: av_free_packet(&asf_st->pkt); yading@11: continue; yading@11: } yading@11: } yading@11: yading@11: /* return packet */ yading@11: if (asf_st->ds_span > 1) { yading@11: if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) { yading@11: av_log(s, AV_LOG_ERROR, yading@11: "pkt.size != ds_packet_size * ds_span (%d %d %d)\n", yading@11: asf_st->pkt.size, asf_st->ds_packet_size, yading@11: asf_st->ds_span); yading@11: } else { yading@11: /* packet descrambling */ yading@11: AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size + yading@11: FF_INPUT_BUFFER_PADDING_SIZE); yading@11: if (buf) { yading@11: uint8_t *newdata = buf->data; yading@11: int offset = 0; yading@11: memset(newdata + asf_st->pkt.size, 0, yading@11: FF_INPUT_BUFFER_PADDING_SIZE); yading@11: while (offset < asf_st->pkt.size) { yading@11: int off = offset / asf_st->ds_chunk_size; yading@11: int row = off / asf_st->ds_span; yading@11: int col = off % asf_st->ds_span; yading@11: int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size; yading@11: assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size); yading@11: assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size); yading@11: memcpy(newdata + offset, yading@11: asf_st->pkt.data + idx * asf_st->ds_chunk_size, yading@11: asf_st->ds_chunk_size); yading@11: offset += asf_st->ds_chunk_size; yading@11: } yading@11: av_buffer_unref(&asf_st->pkt.buf); yading@11: asf_st->pkt.buf = buf; yading@11: asf_st->pkt.data = buf->data; yading@11: } yading@11: } yading@11: } yading@11: asf_st->frag_offset = 0; yading@11: *pkt = asf_st->pkt; yading@11: #if FF_API_DESTRUCT_PACKET yading@11: asf_st->pkt.destruct = NULL; yading@11: #endif yading@11: asf_st->pkt.buf = 0; yading@11: asf_st->pkt.size = 0; yading@11: asf_st->pkt.data = 0; yading@11: asf_st->pkt.side_data_elems = 0; yading@11: asf_st->pkt.side_data = NULL; yading@11: break; // packet completed yading@11: } yading@11: } yading@11: return 0; yading@11: } yading@11: yading@11: static int asf_read_packet(AVFormatContext *s, AVPacket *pkt) yading@11: { yading@11: ASFContext *asf = s->priv_data; yading@11: yading@11: for (;;) { yading@11: int ret; yading@11: yading@11: /* parse cached packets, if any */ yading@11: if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0) yading@11: return ret; yading@11: if ((ret = ff_asf_get_packet(s, s->pb)) < 0) yading@11: assert(asf->packet_size_left < FRAME_HEADER_SIZE || yading@11: asf->packet_segments < 1); yading@11: asf->packet_time_start = 0; yading@11: } yading@11: } yading@11: yading@11: // Added to support seeking after packets have been read yading@11: // If information is not reset, read_packet fails due to yading@11: // leftover information from previous reads yading@11: static void asf_reset_header(AVFormatContext *s) yading@11: { yading@11: ASFContext *asf = s->priv_data; yading@11: ASFStream *asf_st; yading@11: int i; yading@11: yading@11: asf->packet_size_left = 0; yading@11: asf->packet_segments = 0; yading@11: asf->packet_flags = 0; yading@11: asf->packet_property = 0; yading@11: asf->packet_timestamp = 0; yading@11: asf->packet_segsizetype = 0; yading@11: asf->packet_segments = 0; yading@11: asf->packet_seq = 0; yading@11: asf->packet_replic_size = 0; yading@11: asf->packet_key_frame = 0; yading@11: asf->packet_padsize = 0; yading@11: asf->packet_frag_offset = 0; yading@11: asf->packet_frag_size = 0; yading@11: asf->packet_frag_timestamp = 0; yading@11: asf->packet_multi_size = 0; yading@11: asf->packet_obj_size = 0; yading@11: asf->packet_time_delta = 0; yading@11: asf->packet_time_start = 0; yading@11: yading@11: for (i = 0; i < s->nb_streams; i++) { yading@11: asf_st = s->streams[i]->priv_data; yading@11: if (!asf_st) yading@11: continue; yading@11: av_free_packet(&asf_st->pkt); yading@11: asf_st->frag_offset = 0; yading@11: asf_st->seq = 0; yading@11: } yading@11: asf->asf_st = NULL; yading@11: } yading@11: yading@11: static int asf_read_close(AVFormatContext *s) yading@11: { yading@11: asf_reset_header(s); yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int64_t asf_read_pts(AVFormatContext *s, int stream_index, yading@11: int64_t *ppos, int64_t pos_limit) yading@11: { yading@11: AVPacket pkt1, *pkt = &pkt1; yading@11: ASFStream *asf_st; yading@11: int64_t pts; yading@11: int64_t pos = *ppos; yading@11: int i; yading@11: int64_t start_pos[ASF_MAX_STREAMS]; yading@11: yading@11: for (i = 0; i < s->nb_streams; i++) yading@11: start_pos[i] = pos; yading@11: yading@11: if (s->packet_size > 0) yading@11: pos = (pos + s->packet_size - 1 - s->data_offset) / yading@11: s->packet_size * s->packet_size + yading@11: s->data_offset; yading@11: *ppos = pos; yading@11: if (avio_seek(s->pb, pos, SEEK_SET) < 0) yading@11: return AV_NOPTS_VALUE; yading@11: yading@11: asf_reset_header(s); yading@11: for (;;) { yading@11: if (av_read_frame(s, pkt) < 0) { yading@11: av_log(s, AV_LOG_INFO, "asf_read_pts failed\n"); yading@11: return AV_NOPTS_VALUE; yading@11: } yading@11: yading@11: pts = pkt->dts; yading@11: yading@11: av_free_packet(pkt); yading@11: if (pkt->flags & AV_PKT_FLAG_KEY) { yading@11: i = pkt->stream_index; yading@11: yading@11: asf_st = s->streams[i]->priv_data; yading@11: av_assert0(asf_st); yading@11: yading@11: // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0); yading@11: pos = asf_st->packet_pos; yading@11: yading@11: av_add_index_entry(s->streams[i], pos, pts, pkt->size, yading@11: pos - start_pos[i] + 1, AVINDEX_KEYFRAME); yading@11: start_pos[i] = asf_st->packet_pos + 1; yading@11: yading@11: if (pkt->stream_index == stream_index) yading@11: break; yading@11: } yading@11: } yading@11: yading@11: *ppos = pos; yading@11: return pts; yading@11: } yading@11: yading@11: static void asf_build_simple_index(AVFormatContext *s, int stream_index) yading@11: { yading@11: ff_asf_guid g; yading@11: ASFContext *asf = s->priv_data; yading@11: int64_t current_pos = avio_tell(s->pb); yading@11: yading@11: if(avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET) < 0) { yading@11: asf->index_read= -1; yading@11: return; yading@11: } yading@11: yading@11: ff_get_guid(s->pb, &g); yading@11: yading@11: /* the data object can be followed by other top-level objects, yading@11: * skip them until the simple index object is reached */ yading@11: while (ff_guidcmp(&g, &ff_asf_simple_index_header)) { yading@11: int64_t gsize = avio_rl64(s->pb); yading@11: if (gsize < 24 || url_feof(s->pb)) { yading@11: avio_seek(s->pb, current_pos, SEEK_SET); yading@11: asf->index_read= -1; yading@11: return; yading@11: } yading@11: avio_skip(s->pb, gsize - 24); yading@11: ff_get_guid(s->pb, &g); yading@11: } yading@11: yading@11: { yading@11: int64_t itime, last_pos = -1; yading@11: int pct, ict; yading@11: int i; yading@11: int64_t av_unused gsize = avio_rl64(s->pb); yading@11: ff_get_guid(s->pb, &g); yading@11: itime = avio_rl64(s->pb); yading@11: pct = avio_rl32(s->pb); yading@11: ict = avio_rl32(s->pb); yading@11: av_log(s, AV_LOG_DEBUG, yading@11: "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict); yading@11: yading@11: for (i = 0; i < ict; i++) { yading@11: int pktnum = avio_rl32(s->pb); yading@11: int pktct = avio_rl16(s->pb); yading@11: int64_t pos = s->data_offset + s->packet_size * (int64_t)pktnum; yading@11: int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0); yading@11: yading@11: if (pos != last_pos) { yading@11: av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n", yading@11: pktnum, pktct, index_pts); yading@11: av_add_index_entry(s->streams[stream_index], pos, index_pts, yading@11: s->packet_size, 0, AVINDEX_KEYFRAME); yading@11: last_pos = pos; yading@11: } yading@11: } yading@11: asf->index_read = ict > 1; yading@11: } yading@11: avio_seek(s->pb, current_pos, SEEK_SET); yading@11: } yading@11: yading@11: static int asf_read_seek(AVFormatContext *s, int stream_index, yading@11: int64_t pts, int flags) yading@11: { yading@11: ASFContext *asf = s->priv_data; yading@11: AVStream *st = s->streams[stream_index]; yading@11: yading@11: if (s->packet_size <= 0) yading@11: return -1; yading@11: yading@11: /* Try using the protocol's read_seek if available */ yading@11: if (s->pb) { yading@11: int ret = avio_seek_time(s->pb, stream_index, pts, flags); yading@11: if (ret >= 0) yading@11: asf_reset_header(s); yading@11: if (ret != AVERROR(ENOSYS)) yading@11: return ret; yading@11: } yading@11: yading@11: if (!asf->index_read) yading@11: asf_build_simple_index(s, stream_index); yading@11: yading@11: if ((asf->index_read > 0 && st->index_entries)) { yading@11: int index = av_index_search_timestamp(st, pts, flags); yading@11: if (index >= 0) { yading@11: /* find the position */ yading@11: uint64_t pos = st->index_entries[index].pos; yading@11: yading@11: /* do the seek */ yading@11: av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos); yading@11: if(avio_seek(s->pb, pos, SEEK_SET) < 0) yading@11: return -1; yading@11: asf_reset_header(s); yading@11: return 0; yading@11: } yading@11: } yading@11: /* no index or seeking by index failed */ yading@11: if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0) yading@11: return -1; yading@11: asf_reset_header(s); yading@11: return 0; yading@11: } yading@11: yading@11: AVInputFormat ff_asf_demuxer = { yading@11: .name = "asf", yading@11: .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"), yading@11: .priv_data_size = sizeof(ASFContext), yading@11: .read_probe = asf_probe, yading@11: .read_header = asf_read_header, yading@11: .read_packet = asf_read_packet, yading@11: .read_close = asf_read_close, yading@11: .read_seek = asf_read_seek, yading@11: .read_timestamp = asf_read_pts, yading@11: .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH, yading@11: .priv_class = &asf_class, yading@11: };