asf->hdr.send_time		= get_le64(pb);
static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap){    ASFContext *asf = s->priv_data;    GUID g;    ByteIOContext *pb = &s->pb;    AVStream *st;    ASFStream *asf_st;    int size, i;    int64_t gsize;    get_guid(pb, &g);    if (memcmp(&g, &asf_header, sizeof(GUID)))        goto fail;    get_le64(pb);    get_le32(pb);    get_byte(pb);    get_byte(pb);    memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));    for(;;) {        get_guid(pb, &g);        gsize = get_le64(pb);#ifdef DEBUG        printf("%08Lx: ", url_ftell(pb) - 24);        print_guid(&g);        printf("  size=0x%Lx\n", gsize);#endif        if (gsize < 24)            goto fail;        if (!memcmp(&g, &file_header, sizeof(GUID))) {            get_guid(pb, &asf->hdr.guid);	    asf->hdr.file_size		= get_le64(pb);	    asf->hdr.create_time	= get_le64(pb);	    asf->hdr.packets_count	= 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);	    asf->packet_size = asf->hdr.max_pktsize;            asf->nb_packets = asf->hdr.packets_count;        } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {            int type, total_size, type_specific_size, sizeX;            unsigned int tag1;            int64_t pos1, pos2;            pos1 = url_ftell(pb);            st = av_new_stream(s, 0);            if (!st)                goto fail;            av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */            asf_st = av_mallocz(sizeof(ASFStream));            if (!asf_st)                goto fail;            st->priv_data = asf_st;            st->start_time = asf->hdr.preroll;            st->duration = asf->hdr.send_time /                 (10000000 / 1000) - st->start_time;            get_guid(pb, &g);            if (!memcmp(&g, &audio_stream, sizeof(GUID))) {                type = CODEC_TYPE_AUDIO;            } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {                type = CODEC_TYPE_VIDEO;            } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {                type = CODEC_TYPE_UNKNOWN;            } else {                goto fail;            }            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);	    st->codec->codec_type = type;            if (type == CODEC_TYPE_AUDIO) {                get_wav_header(pb, st->codec, type_specific_size);                st->need_parsing = 1;		/* 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);		    asf_st->ds_data_size = get_le16(pb);		    asf_st->ds_silence_data = get_byte(pb);		}		//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_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 {		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_sample = get_le16(pb); /* depth */                tag1 = get_le32(pb);		url_fskip(pb, 20);//                av_log(NULL, 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_sample <= 8)) {            st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));#ifdef WORDS_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 = codec_get_id(codec_bmp_tags, tag1);                if(tag1 == MKTAG('D', 'V', 'R', ' '))                    st->need_parsing = 1;            }            pos2 = url_ftell(pb);            url_fskip(pb, gsize - (pos2 - pos1 + 24));        } else if (!memcmp(&g, &data_header, sizeof(GUID))) {            break;        } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {            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_str16_nolen(pb, len1, s->title, sizeof(s->title));            get_str16_nolen(pb, len2, s->author, sizeof(s->author));            get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));            get_str16_nolen(pb, len4, s->comment, sizeof(s->comment));	    url_fskip(pb, len5);       } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {                int desc_count, i;                desc_count = get_le16(pb);                for(i=0;i<desc_count;i++)                {                        int name_len,value_type,value_len,value_num = 0;                        char *name, *value;                        name_len = get_le16(pb);                        name = (char *)av_mallocz(name_len);                        get_str16_nolen(pb, name_len, name, name_len);                        value_type = get_le16(pb);                        value_len = get_le16(pb);                        if ((value_type == 0) || (value_type == 1)) // unicode or byte                        {                                value = (char *)av_mallocz(value_len);                                get_str16_nolen(pb, value_len, value, value_len);                                if (strcmp(name,"WM/AlbumTitle")==0) { pstrcpy(s->album, sizeof(s->album), value); }                                av_free(value);                        }                        if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD                        {                                if (value_type==2) value_num = get_le32(pb);                                if (value_type==3) value_num = get_le32(pb);                                if (value_type==4) value_num = get_le64(pb);                                if (value_type==5) value_num = get_le16(pb);                                if (strcmp(name,"WM/Track")==0) s->track = value_num + 1;                                if (strcmp(name,"WM/TrackNumber")==0) s->track = value_num;                        }                        av_free(name);                }#if 0        } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {            int v1, v2;            get_guid(pb, &g);            v1 = get_le32(pb);            v2 = get_le16(pb);        } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {            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)) {            goto fail;        } else {            url_fseek(pb, gsize - 24, SEEK_CUR);        }    }    get_guid(pb, &g);    get_le64(pb);    get_byte(pb);    get_byte(pb);    if (url_feof(pb))        goto fail;    asf->data_offset = url_ftell(pb);    asf->packet_size_left = 0;    return 0; fail:     for(i=0;i<s->nb_streams;i++) {        AVStream *st = s->streams[i];	if (st) {	    av_free(st->priv_data);            av_free(st->codec->extradata);	}        av_free(st);    }    return -1;}