static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap) { ASFContext *asf = s->priv_data; ff_asf_guid g; ByteIOContext *pb = s->pb; AVStream *st; ASFStream *asf_st; int size, i; int64_t gsize; AVRational dar[128]; uint32_t bitrate[128]; memset(dar, 0, sizeof(dar)); memset(bitrate, 0, sizeof(bitrate)); get_guid(pb, &g); if (guidcmp(&g, &ff_asf_header)) return -1; get_le64(pb); get_le32(pb); get_byte(pb); get_byte(pb); memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid)); for(;;) { uint64_t gpos= url_ftell(pb); get_guid(pb, &g); gsize = get_le64(pb); dprintf(s, "%08"PRIx64": ", gpos); print_guid(&g); dprintf(s, " size=0x%"PRIx64"\n", gsize); if (!guidcmp(&g, &ff_asf_data_header)) { asf->data_object_offset = url_ftell(pb); // if not streaming, gsize is not unlimited (how?), and there is enough space in the file.. if (!(asf->hdr.flags & 0x01) && gsize >= 100) { asf->data_object_size = gsize - 24; } else { asf->data_object_size = (uint64_t)-1; } break; } if (gsize < 24) return -1; if (!guidcmp(&g, &ff_asf_file_header)) { get_guid(pb, &asf->hdr.guid); asf->hdr.file_size = get_le64(pb); asf->hdr.create_time = get_le64(pb); asf->nb_packets = get_le64(pb); asf->hdr.play_time = get_le64(pb); asf->hdr.send_time = get_le64(pb); asf->hdr.preroll = get_le32(pb); asf->hdr.ignore = get_le32(pb); asf->hdr.flags = get_le32(pb); asf->hdr.min_pktsize = get_le32(pb); asf->hdr.max_pktsize = get_le32(pb); asf->hdr.max_bitrate = get_le32(pb); s->packet_size = asf->hdr.max_pktsize; } else if (!guidcmp(&g, &ff_asf_stream_header)) { enum AVMediaType type; int type_specific_size, sizeX; uint64_t total_size; unsigned int tag1; int64_t pos1, pos2, start_time; int test_for_ext_stream_audio, is_dvr_ms_audio=0; if (s->nb_streams == ASF_MAX_STREAMS) { av_log(s, AV_LOG_ERROR, "too many streams\n"); return AVERROR(EINVAL); } pos1 = url_ftell(pb); st = av_new_stream(s, 0); if (!st) return AVERROR(ENOMEM); av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */ asf_st = av_mallocz(sizeof(ASFStream)); if (!asf_st) return AVERROR(ENOMEM); st->priv_data = asf_st; start_time = asf->hdr.preroll; asf_st->stream_language_index = 128; // invalid stream index means no language info if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming... st->duration = asf->hdr.play_time / (10000000 / 1000) - start_time; } get_guid(pb, &g); test_for_ext_stream_audio = 0; if (!guidcmp(&g, &ff_asf_audio_stream)) { type = AVMEDIA_TYPE_AUDIO; } else if (!guidcmp(&g, &ff_asf_video_stream)) { type = AVMEDIA_TYPE_VIDEO; } else if (!guidcmp(&g, &ff_asf_command_stream)) { type = AVMEDIA_TYPE_DATA; } else if (!guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) { test_for_ext_stream_audio = 1; type = AVMEDIA_TYPE_UNKNOWN; } else { return -1; } get_guid(pb, &g); total_size = get_le64(pb); type_specific_size = get_le32(pb); get_le32(pb); st->id = get_le16(pb) & 0x7f; /* stream id */ // mapping of asf ID to AV stream ID; asf->asfid2avid[st->id] = s->nb_streams - 1; get_le32(pb); if (test_for_ext_stream_audio) { get_guid(pb, &g); if (!guidcmp(&g, &ff_asf_ext_stream_audio_stream)) { type = AVMEDIA_TYPE_AUDIO; is_dvr_ms_audio=1; get_guid(pb, &g); get_le32(pb); get_le32(pb); get_le32(pb); get_guid(pb, &g); get_le32(pb); } } st->codec->codec_type = type; if (type == AVMEDIA_TYPE_AUDIO) { ff_get_wav_header(pb, st->codec, type_specific_size); if (is_dvr_ms_audio) { // codec_id and codec_tag are unreliable in dvr_ms // files. Set them later by probing stream. st->codec->codec_id = CODEC_ID_PROBE; st->codec->codec_tag = 0; } if (st->codec->codec_id == CODEC_ID_AAC) { st->need_parsing = AVSTREAM_PARSE_NONE; } else { st->need_parsing = AVSTREAM_PARSE_FULL; } /* We have to init the frame size at some point .... */ pos2 = url_ftell(pb); if (gsize >= (pos2 + 8 - pos1 + 24)) { asf_st->ds_span = get_byte(pb); asf_st->ds_packet_size = get_le16(pb); asf_st->ds_chunk_size = get_le16(pb); get_le16(pb); //ds_data_size get_byte(pb); //ds_silence_data } //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n", // asf_st->ds_packet_size, asf_st->ds_chunk_size, // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data); if (asf_st->ds_span > 1) { if (!asf_st->ds_chunk_size || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1) || asf_st->ds_packet_size % asf_st->ds_chunk_size) asf_st->ds_span = 0; // disable descrambling } switch (st->codec->codec_id) { case CODEC_ID_MP3: st->codec->frame_size = MPA_FRAME_SIZE; break; case CODEC_ID_PCM_S16LE: case CODEC_ID_PCM_S16BE: case CODEC_ID_PCM_U16LE: case CODEC_ID_PCM_U16BE: case CODEC_ID_PCM_S8: case CODEC_ID_PCM_U8: case CODEC_ID_PCM_ALAW: case CODEC_ID_PCM_MULAW: st->codec->frame_size = 1; break; default: /* This is probably wrong, but it prevents a crash later */ st->codec->frame_size = 1; break; } } else if (type == AVMEDIA_TYPE_VIDEO) { get_le32(pb); get_le32(pb); get_byte(pb); size = get_le16(pb); /* size */ sizeX= get_le32(pb); /* size */ st->codec->width = get_le32(pb); st->codec->height = get_le32(pb); /* not available for asf */ get_le16(pb); /* panes */ st->codec->bits_per_coded_sample = get_le16(pb); /* depth */ tag1 = get_le32(pb); url_fskip(pb, 20); // av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX); size= sizeX; if (size > 40) { st->codec->extradata_size = size - 40; st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); get_buffer(pb, st->codec->extradata, st->codec->extradata_size); } /* Extract palette from extradata if bpp <= 8 */ /* This code assumes that extradata contains only palette */ /* This is true for all paletted codecs implemented in ffmpeg */ if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) { st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl)); #if HAVE_BIGENDIAN for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++) st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]); #else memcpy(st->codec->palctrl->palette, st->codec->extradata, FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)); #endif st->codec->palctrl->palette_changed = 1; } st->codec->codec_tag = tag1; st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1); if(tag1 == MKTAG('D', 'V', 'R', ' ')) st->need_parsing = AVSTREAM_PARSE_FULL; if(st->codec->codec_id == CODEC_ID_H264) st->need_parsing = AVSTREAM_PARSE_FULL_ONCE; } pos2 = url_ftell(pb); url_fskip(pb, gsize - (pos2 - pos1 + 24)); } else if (!guidcmp(&g, &ff_asf_comment_header)) { int len1, len2, len3, len4, len5; len1 = get_le16(pb); len2 = get_le16(pb); len3 = get_le16(pb); len4 = get_le16(pb); len5 = get_le16(pb); get_tag(s, "title" , 0, len1); get_tag(s, "author" , 0, len2); get_tag(s, "copyright", 0, len3); get_tag(s, "comment" , 0, len4); url_fskip(pb, len5); } else if (!guidcmp(&g, &stream_bitrate_guid)) { int stream_count = get_le16(pb); int j; // av_log(s, AV_LOG_ERROR, "stream bitrate properties\n"); // av_log(s, AV_LOG_ERROR, "streams %d\n", streams); for(j = 0; j < stream_count; j++) { int flags, bitrate, stream_id; flags= get_le16(pb); bitrate= get_le32(pb); stream_id= (flags & 0x7f); // av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate); asf->stream_bitrates[stream_id]= bitrate; } } else if (!guidcmp(&g, &ff_asf_language_guid)) { int j; int stream_count = get_le16(pb); for(j = 0; j < stream_count; j++) { char lang[6]; unsigned int lang_len = get_byte(pb); get_str16_nolen(pb, lang_len, lang, sizeof(lang)); if (j < 128) av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages)); } } else if (!guidcmp(&g, &ff_asf_extended_content_header)) { int desc_count, i; desc_count = get_le16(pb); for(i=0;i<desc_count;i++) { int name_len,value_type,value_len; char name[1024]; name_len = get_le16(pb); if (name_len%2) // must be even, broken lavf versions wrote len-1 name_len += 1; get_str16_nolen(pb, name_len, name, sizeof(name)); value_type = get_le16(pb); value_len = get_le16(pb); if (!value_type && value_len%2) value_len += 1; get_tag(s, name, value_type, value_len); } } else if (!guidcmp(&g, &ff_asf_metadata_header)) { int n, stream_num, name_len, value_len, value_type, value_num; n = get_le16(pb); for(i=0;i<n;i++) { char name[1024]; get_le16(pb); //lang_list_index stream_num= get_le16(pb); name_len= get_le16(pb); value_type= get_le16(pb); value_len= get_le32(pb); get_str16_nolen(pb, name_len, name, sizeof(name)); //av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name); value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere url_fskip(pb, value_len - 2); if(stream_num<128){ if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num; else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num; } } } else if (!guidcmp(&g, &ff_asf_ext_stream_header)) { int ext_len, payload_ext_ct, stream_ct; uint32_t ext_d, leak_rate, stream_num; unsigned int stream_languageid_index; get_le64(pb); // starttime get_le64(pb); // endtime leak_rate = get_le32(pb); // leak-datarate get_le32(pb); // bucket-datasize get_le32(pb); // init-bucket-fullness get_le32(pb); // alt-leak-datarate get_le32(pb); // alt-bucket-datasize get_le32(pb); // alt-init-bucket-fullness get_le32(pb); // max-object-size get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved) stream_num = get_le16(pb); // stream-num stream_languageid_index = get_le16(pb); // stream-language-id-index if (stream_num < 128) asf->streams[stream_num].stream_language_index = stream_languageid_index; get_le64(pb); // avg frametime in 100ns units stream_ct = get_le16(pb); //stream-name-count payload_ext_ct = get_le16(pb); //payload-extension-system-count if (stream_num < 128) bitrate[stream_num] = leak_rate; for (i=0; i<stream_ct; i++){ get_le16(pb); ext_len = get_le16(pb); url_fseek(pb, ext_len, SEEK_CUR); } for (i=0; i<payload_ext_ct; i++){ get_guid(pb, &g); ext_d=get_le16(pb); ext_len=get_le32(pb); url_fseek(pb, ext_len, SEEK_CUR); } // there could be a optional stream properties object to follow // if so the next iteration will pick it up continue; } else if (!guidcmp(&g, &ff_asf_head1_guid)) { int v1, v2; get_guid(pb, &g); v1 = get_le32(pb); v2 = get_le16(pb); continue; } else if (!guidcmp(&g, &ff_asf_marker_header)) { int i, count, name_len; char name[1024]; get_le64(pb); // reserved 16 bytes get_le64(pb); // ... count = get_le32(pb); // markers count get_le16(pb); // reserved 2 bytes name_len = get_le16(pb); // name length for(i=0;i<name_len;i++){ get_byte(pb); // skip the name } for(i=0;i<count;i++){ int64_t pres_time; int name_len; get_le64(pb); // offset, 8 bytes pres_time = get_le64(pb); // presentation time get_le16(pb); // entry length get_le32(pb); // send time get_le32(pb); // flags name_len = get_le32(pb); // name length get_str16_nolen(pb, name_len * 2, name, sizeof(name)); ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name ); } #if 0 } else if (!guidcmp(&g, &ff_asf_codec_comment_header)) { int len, v1, n, num; char str[256], *q; char tag[16]; get_guid(pb, &g); print_guid(&g); n = get_le32(pb); for(i=0;i<n;i++) { num = get_le16(pb); /* stream number */ get_str16(pb, str, sizeof(str)); get_str16(pb, str, sizeof(str)); len = get_le16(pb); q = tag; while (len > 0) { v1 = get_byte(pb); if ((q - tag) < sizeof(tag) - 1) *q++ = v1; len--; } *q = '\0'; } #endif } else if (url_feof(pb)) { return -1; } else { if (!s->keylen) { if (!guidcmp(&g, &ff_asf_content_encryption)) { av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n"); } else if (!guidcmp(&g, &ff_asf_ext_content_encryption)) { av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n"); } else if (!guidcmp(&g, &ff_asf_digital_signature)) { av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n"); } } } if(url_ftell(pb) != gpos + gsize) av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", url_ftell(pb)-gpos, gsize); url_fseek(pb, gpos + gsize, SEEK_SET); } get_guid(pb, &g); get_le64(pb); get_byte(pb); get_byte(pb); if (url_feof(pb)) return -1; asf->data_offset = url_ftell(pb); asf->packet_size_left = 0; for(i=0; i<128; i++){ int stream_num= asf->asfid2avid[i]; if(stream_num>=0){ AVStream *st = s->streams[stream_num]; if (!st->codec->bit_rate) st->codec->bit_rate = bitrate[i]; if (dar[i].num > 0 && dar[i].den > 0) av_reduce(&st->sample_aspect_ratio.num, &st->sample_aspect_ratio.den, dar[i].num, dar[i].den, INT_MAX); //av_log(s, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den); // copy and convert language codes to the frontend if (asf->streams[i].stream_language_index < 128) { const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index]; 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) av_metadata_set2(&st->metadata, "language", iso6392, 0); } } } } return 0; }