cllc: Implement ARGB support
[ffmpeg.git] / libavformat / asf.c
index 1d5c149..cc2833d 100644 (file)
 /*
- * ASF compatible demuxer
- * Copyright (c) 2000, 2001 Fabrice Bellard.
+ * Copyright (c) 2000, 2001 Fabrice Bellard
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * 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.
  *
- * FFmpeg is distributed in the hope that it will be useful,
+ * 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 FFmpeg; if not, write to the Free Software
+ * 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/common.h"
-#include "libavcodec/mpegaudio.h"
-#include "avformat.h"
-#include "riff.h"
 #include "asf.h"
-#include "asfcrypt.h"
 
-void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
 
-#undef NDEBUG
-#include <assert.h>
-
-#define FRAME_HEADER_SIZE 17
-// Fix Me! FRAME_HEADER_SIZE may be different.
-
-static const GUID index_guid = {
-    0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
+const ff_asf_guid ff_asf_header = {
+    0x30, 0x26, 0xB2, 0x75, 0x8E, 0x66, 0xCF, 0x11, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C
 };
 
-static const GUID stream_bitrate_guid = { /* (http://get.to/sdp) */
-    0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
+const ff_asf_guid ff_asf_file_header = {
+    0xA1, 0xDC, 0xAB, 0x8C, 0x47, 0xA9, 0xCF, 0x11, 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65
 };
-/**********************************/
-/* decoding */
-
-//#define DEBUG
-
-#ifdef DEBUG
-#define PRINT_IF_GUID(g,cmp) \
-if (!memcmp(g, &cmp, sizeof(GUID))) \
-    dprintf(NULL, "(GUID: %s) ", #cmp)
-
-static void print_guid(const GUID *g)
-{
-    int i;
-    PRINT_IF_GUID(g, asf_header);
-    else PRINT_IF_GUID(g, file_header);
-    else PRINT_IF_GUID(g, stream_header);
-    else PRINT_IF_GUID(g, audio_stream);
-    else PRINT_IF_GUID(g, audio_conceal_none);
-    else PRINT_IF_GUID(g, video_stream);
-    else PRINT_IF_GUID(g, video_conceal_none);
-    else PRINT_IF_GUID(g, command_stream);
-    else PRINT_IF_GUID(g, comment_header);
-    else PRINT_IF_GUID(g, codec_comment_header);
-    else PRINT_IF_GUID(g, codec_comment1_header);
-    else PRINT_IF_GUID(g, data_header);
-    else PRINT_IF_GUID(g, index_guid);
-    else PRINT_IF_GUID(g, head1_guid);
-    else PRINT_IF_GUID(g, head2_guid);
-    else PRINT_IF_GUID(g, my_guid);
-    else PRINT_IF_GUID(g, ext_stream_header);
-    else PRINT_IF_GUID(g, extended_content_header);
-    else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
-    else PRINT_IF_GUID(g, ext_stream_audio_stream);
-    else PRINT_IF_GUID(g, metadata_header);
-    else PRINT_IF_GUID(g, stream_bitrate_guid);
-    else
-        dprintf(NULL, "(GUID: unknown) ");
-    for(i=0;i<16;i++)
-        dprintf(NULL, " 0x%02x,", (*g)[i]);
-    dprintf(NULL, "}\n");
-}
-#undef PRINT_IF_GUID
-#else
-#define print_guid(g)
-#endif
-
-static void get_guid(ByteIOContext *s, GUID *g)
-{
-    assert(sizeof(*g) == 16);
-    get_buffer(s, *g, sizeof(*g));
-}
-
-#if 0
-static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
-{
-    int len, c;
-    char *q;
-
-    len = get_le16(pb);
-    q = buf;
-    while (len > 0) {
-        c = get_le16(pb);
-        if ((q - buf) < buf_size - 1)
-            *q++ = c;
-        len--;
-    }
-    *q = '\0';
-}
-#endif
-
-static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
-{
-    char* q = buf;
-    len /= 2;
-    while (len--) {
-        uint8_t tmp;
-        PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
-    }
-    *q = '\0';
-}
-
-static int asf_probe(AVProbeData *pd)
-{
-    /* check file header */
-    if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
-        return AVPROBE_SCORE_MAX;
-    else
-        return 0;
-}
-
-static int get_value(ByteIOContext *pb, int type){
-    switch(type){
-        case 2: return get_le32(pb);
-        case 3: return get_le32(pb);
-        case 4: return get_le64(pb);
-        case 5: return get_le16(pb);
-        default:return INT_MIN;
-    }
-}
-
-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;
-    AVRational dar[128];
-    uint32_t bitrate[128];
-
-    memset(dar, 0, sizeof(dar));
-    memset(bitrate, 0, sizeof(bitrate));
-
-    get_guid(pb, &g);
-    if (memcmp(&g, &asf_header, sizeof(GUID)))
-        return -1;
-    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);
-        dprintf(s, "%08"PRIx64": ", url_ftell(pb) - 24);
-        print_guid(&g);
-        dprintf(s, "  size=0x%"PRIx64"\n", gsize);
-        if (!memcmp(&g, &data_header, sizeof(GUID))) {
-            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 (!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->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);
-            asf->packet_size = asf->hdr.max_pktsize;
-        } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
-            enum CodecType 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;
-
-            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;
-
-            if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
-                st->duration = asf->hdr.send_time /
-                    (10000000 / 1000) - start_time;
-            }
-            get_guid(pb, &g);
-
-            test_for_ext_stream_audio = 0;
-            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_DATA;
-            } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
-                test_for_ext_stream_audio = 1;
-                type = CODEC_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 (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
-                    type = CODEC_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 == CODEC_TYPE_AUDIO) {
-                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;
-                }
-                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 == CODEC_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(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_coded_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 = AVSTREAM_PARSE_FULL;
-            }
-            pos2 = url_ftell(pb);
-            url_fskip(pb, gsize - (pos2 - pos1 + 24));
-        } 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, &stream_bitrate_guid, sizeof(GUID))) {
-            int stream_count = get_le16(pb);
-            int j;
-
-//            av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n");
-//            av_log(NULL, 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(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
-                asf->stream_bitrates[stream_id]= bitrate;
-            }
-       } 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;
-                        uint64_t value_num = 0;
-                        char name[1024];
-
-                        name_len = get_le16(pb);
-                        get_str16_nolen(pb, name_len, name, sizeof(name));
-                        value_type = get_le16(pb);
-                        value_len = get_le16(pb);
-                        if (value_type <= 1) // unicode or byte
-                        {
-                                if     (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
-                                else if(!strcmp(name,"WM/Genre"     )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
-                                else if(!strcmp(name,"WM/Year"      )) {
-                                    char year[8];
-                                    get_str16_nolen(pb, value_len, year, sizeof(year));
-                                    s->year = atoi(year);
-                                }
-                                else if(!strcmp(name,"WM/Track") && s->track == 0) {
-                                    char track[8];
-                                    get_str16_nolen(pb, value_len, track, sizeof(track));
-                                    s->track = strtol(track, NULL, 10) + 1;
-                                }
-                                else if(!strcmp(name,"WM/TrackNumber")) {
-                                    char track[8];
-                                    get_str16_nolen(pb, value_len, track, sizeof(track));
-                                    s->track = strtol(track, NULL, 10);
-                                }
-                                else url_fskip(pb, value_len);
-                        }
-                        else if (value_type <= 5) // boolean or DWORD or QWORD or WORD
-                        {
-                                value_num= get_value(pb, value_type);
-                                if (!strcmp(name,"WM/Track"      ) && s->track == 0) s->track = value_num + 1;
-                                if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
-                        }else
-                            url_fskip(pb, value_len);
-                }
-        } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
-            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(NULL, 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 (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
-            int ext_len, payload_ext_ct, stream_ct;
-            uint32_t ext_d, leak_rate, stream_num;
-            int64_t pos_ex_st;
-            pos_ex_st = url_ftell(pb);
-
-            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
-            get_le16(pb); // stream-language-id-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
-        } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
-            int v1, v2;
-            get_guid(pb, &g);
-            v1 = get_le32(pb);
-            v2 = get_le16(pb);
-#if 0
-        } 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)) {
-            return -1;
-        } 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))
-        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(NULL, 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);
-        }
-    }
-
-    return 0;
-}
-
-#define DO_2BITS(bits, var, defval) \
-    switch (bits & 3) \
-    { \
-    case 3: var = get_le32(pb); rsize += 4; break; \
-    case 2: var = get_le16(pb); rsize += 2; break; \
-    case 1: var = get_byte(pb); rsize++; break; \
-    default: var = defval; break; \
-    }
-
-int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb)
-{
-    ASFContext *asf = s->priv_data;
-    uint32_t packet_length, padsize;
-    int rsize = 8;
-    int c, d, e, off;
-
-    off= (url_ftell(pb) - s->data_offset) % asf->packet_size + 3;
-
-    c=d=e=-1;
-    while(off-- > 0){
-        c=d; d=e;
-        e= get_byte(pb);
-        if(c == 0x82 && !d && !e)
-            break;
-    }
-
-    if (c != 0x82) {
-        if (!url_feof(pb))
-            av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%"PRId64"\n", c, url_ftell(pb));
-    }
-    if ((c & 0x8f) == 0x82) {
-        if (d || e) {
-            if (!url_feof(pb))
-                av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
-            return -1;
-        }
-        c= get_byte(pb);
-        d= get_byte(pb);
-        rsize+=3;
-    }else{
-        url_fseek(pb, -1, SEEK_CUR); //FIXME
-    }
-
-    asf->packet_flags    = c;
-    asf->packet_property = d;
-
-    DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
-    DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
-    DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
-
-    //the following checks prevent overflows and infinite loops
-    if(packet_length >= (1U<<29)){
-        av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
-        return -1;
-    }
-    if(padsize >= packet_length){
-        av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
-        return -1;
-    }
-
-    asf->packet_timestamp = get_le32(pb);
-    get_le16(pb); /* duration */
-    // rsize has at least 11 bytes which have to be present
-
-    if (asf->packet_flags & 0x01) {
-        asf->packet_segsizetype = get_byte(pb); rsize++;
-        asf->packet_segments = asf->packet_segsizetype & 0x3f;
-    } else {
-        asf->packet_segments = 1;
-        asf->packet_segsizetype = 0x80;
-    }
-    asf->packet_size_left = packet_length - padsize - rsize;
-    if (packet_length < asf->hdr.min_pktsize)
-        padsize += asf->hdr.min_pktsize - packet_length;
-    asf->packet_padsize = padsize;
-    dprintf(s, "packet: size=%d padsize=%d  left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
-    return 0;
-}
 
-/**
- *
- * @return <0 if error
- */
-static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){
-    ASFContext *asf = s->priv_data;
-    int rsize = 1;
-    int num = get_byte(pb);
-    int64_t ts0, ts1;
-
-    asf->packet_segments--;
-    asf->packet_key_frame = num >> 7;
-    asf->stream_index = asf->asfid2avid[num & 0x7f];
-    // sequence should be ignored!
-    DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
-    DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
-    DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
-//printf("key:%d stream:%d seq:%d offset:%d replic_size:%d\n", asf->packet_key_frame, asf->stream_index, asf->packet_seq, //asf->packet_frag_offset, asf->packet_replic_size);
-    if (asf->packet_replic_size >= 8) {
-        asf->packet_obj_size = get_le32(pb);
-        if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
-            av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
-            return -1;
-        }
-        asf->packet_frag_timestamp = get_le32(pb); // timestamp
-        if(asf->packet_replic_size >= 8+38+4){
-//            for(i=0; i<asf->packet_replic_size-8; i++)
-//                av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
-//            av_log(s, AV_LOG_DEBUG, "\n");
-            url_fskip(pb, 10);
-            ts0= get_le64(pb);
-            ts1= get_le64(pb);
-            url_fskip(pb, 12);
-            get_le32(pb);
-            url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
-            if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
-            else         asf->packet_frag_timestamp= AV_NOPTS_VALUE;
-        }else
-            url_fskip(pb, asf->packet_replic_size - 8);
-        rsize += asf->packet_replic_size; // FIXME - check validity
-    } else if (asf->packet_replic_size==1){
-        // multipacket - frag_offset is beginning timestamp
-        asf->packet_time_start = asf->packet_frag_offset;
-        asf->packet_frag_offset = 0;
-        asf->packet_frag_timestamp = asf->packet_timestamp;
-
-        asf->packet_time_delta = get_byte(pb);
-        rsize++;
-    }else if(asf->packet_replic_size!=0){
-        av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
-        return -1;
-    }
-    if (asf->packet_flags & 0x01) {
-        DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
-        if(asf->packet_frag_size > asf->packet_size_left - rsize){
-            av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
-            return -1;
-        }
-        //printf("Fragsize %d\n", asf->packet_frag_size);
-    } else {
-        asf->packet_frag_size = asf->packet_size_left - rsize;
-        //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
-    }
-    if (asf->packet_replic_size == 1) {
-        asf->packet_multi_size = asf->packet_frag_size;
-        if (asf->packet_multi_size > asf->packet_size_left)
-            return -1;
-    }
-    asf->packet_size_left -= rsize;
-    //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
-
-    return 0;
-}
-
-int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
-{
-    ASFContext *asf = s->priv_data;
-    ASFStream *asf_st = 0;
-    for (;;) {
-        if(url_feof(pb))
-            return AVERROR(EIO);
-        if (asf->packet_size_left < FRAME_HEADER_SIZE
-            || asf->packet_segments < 1) {
-            //asf->packet_size_left <= asf->packet_padsize) {
-            int ret = asf->packet_size_left + asf->packet_padsize;
-            //printf("PacketLeftSize:%d  Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
-            assert(ret>=0);
-            /* fail safe */
-            url_fskip(pb, ret);
-
-            asf->packet_pos= url_ftell(pb);
-            if (asf->data_object_size != (uint64_t)-1 &&
-                (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
-                return AVERROR(EIO); /* Do not exceed the size of the data object */
-            return 1;
-        }
-        if (asf->packet_time_start == 0) {
-            if(asf_read_frame_header(s, s->pb) < 0){
-                asf->packet_segments= 0;
-                continue;
-            }
-            if (asf->stream_index < 0
-                || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
-                || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
-                ) {
-                asf->packet_time_start = 0;
-                /* unhandled packet (should not happen) */
-                url_fskip(pb, asf->packet_frag_size);
-                asf->packet_size_left -= asf->packet_frag_size;
-                if(asf->stream_index < 0)
-                    av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
-                continue;
-            }
-            asf->asf_st = s->streams[asf->stream_index]->priv_data;
-        }
-        asf_st = asf->asf_st;
-
-        if (asf->packet_replic_size == 1) {
-            // frag_offset is here used as the beginning timestamp
-            asf->packet_frag_timestamp = asf->packet_time_start;
-            asf->packet_time_start += asf->packet_time_delta;
-            asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
-            asf->packet_size_left--;
-            asf->packet_multi_size--;
-            if (asf->packet_multi_size < asf->packet_obj_size)
-            {
-                asf->packet_time_start = 0;
-                url_fskip(pb, asf->packet_multi_size);
-                asf->packet_size_left -= asf->packet_multi_size;
-                continue;
-            }
-            asf->packet_multi_size -= asf->packet_obj_size;
-            //printf("COMPRESS size  %d  %d  %d   ms:%d\n", asf->packet_obj_size, asf->packet_frag_timestamp, asf->packet_size_left, asf->packet_multi_size);
-        }
-        if(   /*asf->packet_frag_size == asf->packet_obj_size*/
-              asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
-           && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
-            av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
-                asf_st->frag_offset, asf->packet_frag_size,
-                asf->packet_obj_size, asf_st->pkt.size);
-            asf->packet_obj_size= asf_st->pkt.size;
-        }
-
-        if (   asf_st->pkt.size != asf->packet_obj_size
-            || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
-            if(asf_st->pkt.data){
-                av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
-                asf_st->frag_offset = 0;
-                av_free_packet(&asf_st->pkt);
-            }
-            /* new packet */
-            av_new_packet(&asf_st->pkt, asf->packet_obj_size);
-            asf_st->seq = asf->packet_seq;
-            asf_st->pkt.dts = asf->packet_frag_timestamp;
-            asf_st->pkt.stream_index = asf->stream_index;
-            asf_st->pkt.pos =
-            asf_st->packet_pos= asf->packet_pos;
-//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
-//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
-//s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
-            if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
-                asf->packet_key_frame = 1;
-            if (asf->packet_key_frame)
-                asf_st->pkt.flags |= PKT_FLAG_KEY;
-        }
-
-        /* read data */
-        //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
-        //       asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
-        //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
-        asf->packet_size_left -= asf->packet_frag_size;
-        if (asf->packet_size_left < 0)
-            continue;
-
-        if(   asf->packet_frag_offset >= asf_st->pkt.size
-           || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
-            av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
-                asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
-            continue;
-        }
-
-        get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
-                   asf->packet_frag_size);
-        if (s->key && s->keylen == 20)
-            ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
-                            asf->packet_frag_size);
-        asf_st->frag_offset += asf->packet_frag_size;
-        /* test if whole packet is read */
-        if (asf_st->frag_offset == asf_st->pkt.size) {
-            //workaround for macroshit radio DVR-MS files
-            if(   s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
-               && asf_st->pkt.size > 100){
-                int i;
-                for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
-                if(i == asf_st->pkt.size){
-                    av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
-                    asf_st->frag_offset = 0;
-                    av_free_packet(&asf_st->pkt);
-                    continue;
-                }
-            }
-
-            /* return packet */
-            if (asf_st->ds_span > 1) {
-              if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
-                    av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span (%d %d %d)\n", asf_st->pkt.size, asf_st->ds_packet_size, asf_st->ds_span);
-              }else{
-                /* packet descrambling */
-                uint8_t *newdata = av_malloc(asf_st->pkt.size);
-                if (newdata) {
-                    int offset = 0;
-                    while (offset < asf_st->pkt.size) {
-                        int off = offset / asf_st->ds_chunk_size;
-                        int row = off / asf_st->ds_span;
-                        int col = off % asf_st->ds_span;
-                        int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
-                        //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
-
-                        assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
-                        assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
-                        memcpy(newdata + offset,
-                               asf_st->pkt.data + idx * asf_st->ds_chunk_size,
-                               asf_st->ds_chunk_size);
-                        offset += asf_st->ds_chunk_size;
-                    }
-                    av_free(asf_st->pkt.data);
-                    asf_st->pkt.data = newdata;
-                }
-              }
-            }
-            asf_st->frag_offset = 0;
-            *pkt= asf_st->pkt;
-            //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
-            asf_st->pkt.size = 0;
-            asf_st->pkt.data = 0;
-            break; // packet completed
-        }
-    }
-    return 0;
-}
-
-static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
-    ASFContext *asf = s->priv_data;
-
-    for (;;) {
-        int ret;
-
-        /* parse cached packets, if any */
-        if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
-            return ret;
-        if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
-            assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
-        asf->packet_time_start = 0;
-    }
-
-    return 0;
-}
-
-// Added to support seeking after packets have been read
-// If information is not reset, read_packet fails due to
-// leftover information from previous reads
-static void asf_reset_header(AVFormatContext *s)
-{
-    ASFContext *asf = s->priv_data;
-    ASFStream *asf_st;
-    int i;
-
-    asf->packet_nb_frames = 0;
-    asf->packet_size_left = 0;
-    asf->packet_segments = 0;
-    asf->packet_flags = 0;
-    asf->packet_property = 0;
-    asf->packet_timestamp = 0;
-    asf->packet_segsizetype = 0;
-    asf->packet_segments = 0;
-    asf->packet_seq = 0;
-    asf->packet_replic_size = 0;
-    asf->packet_key_frame = 0;
-    asf->packet_padsize = 0;
-    asf->packet_frag_offset = 0;
-    asf->packet_frag_size = 0;
-    asf->packet_frag_timestamp = 0;
-    asf->packet_multi_size = 0;
-    asf->packet_obj_size = 0;
-    asf->packet_time_delta = 0;
-    asf->packet_time_start = 0;
-
-    for(i=0; i<s->nb_streams; i++){
-        asf_st= s->streams[i]->priv_data;
-        av_free_packet(&asf_st->pkt);
-        asf_st->frag_offset=0;
-        asf_st->seq=0;
-    }
-    asf->asf_st= NULL;
-}
-
-static int asf_read_close(AVFormatContext *s)
-{
-    int i;
-
-    asf_reset_header(s);
-    for(i=0;i<s->nb_streams;i++) {
-        AVStream *st = s->streams[i];
-        av_free(st->codec->palctrl);
-    }
-    return 0;
-}
-
-static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
-{
-    ASFContext *asf = s->priv_data;
-    AVPacket pkt1, *pkt = &pkt1;
-    ASFStream *asf_st;
-    int64_t pts;
-    int64_t pos= *ppos;
-    int i;
-    int64_t start_pos[s->nb_streams];
-
-    for(i=0; i<s->nb_streams; i++){
-        start_pos[i]= pos;
-    }
+const ff_asf_guid ff_asf_stream_header = {
+    0x91, 0x07, 0xDC, 0xB7, 0xB7, 0xA9, 0xCF, 0x11, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65
+};
 
-    pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
-    *ppos= pos;
-    url_fseek(s->pb, pos, SEEK_SET);
+const ff_asf_guid ff_asf_ext_stream_header = {
+    0xCB, 0xA5, 0xE6, 0x14, 0x72, 0xC6, 0x32, 0x43, 0x83, 0x99, 0xA9, 0x69, 0x52, 0x06, 0x5B, 0x5A
+};
 
-//printf("asf_read_pts\n");
-    asf_reset_header(s);
-    for(;;){
-        if (av_read_frame(s, pkt) < 0){
-            av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
-            return AV_NOPTS_VALUE;
-        }
+const ff_asf_guid ff_asf_audio_stream = {
+    0x40, 0x9E, 0x69, 0xF8, 0x4D, 0x5B, 0xCF, 0x11, 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B
+};
 
-        pts= pkt->pts;
+const ff_asf_guid ff_asf_audio_conceal_none = {
+    // 0x40, 0xa4, 0xf1, 0x49, 0x4ece, 0x11d0, 0xa3, 0xac, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6
+    // New value lifted from avifile
+    0x00, 0x57, 0xfb, 0x20, 0x55, 0x5B, 0xCF, 0x11, 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b
+};
 
-        av_free_packet(pkt);
-        if(pkt->flags&PKT_FLAG_KEY){
-            i= pkt->stream_index;
+const ff_asf_guid ff_asf_audio_conceal_spread = {
+     0x50, 0xCD, 0xC3, 0xBF, 0x8F, 0x61, 0xCF, 0x11, 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20
+};
 
-            asf_st= s->streams[i]->priv_data;
+const ff_asf_guid ff_asf_video_stream = {
+    0xC0, 0xEF, 0x19, 0xBC, 0x4D, 0x5B, 0xCF, 0x11, 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B
+};
 
-//            assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
-            pos= asf_st->packet_pos;
+const ff_asf_guid ff_asf_jfif_media = {
+    0x00, 0xE1, 0x1B, 0xB6, 0x4E, 0x5B, 0xCF, 0x11, 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B
+};
 
-            av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
-            start_pos[i]= asf_st->packet_pos + 1;
+const ff_asf_guid ff_asf_video_conceal_none = {
+    0x00, 0x57, 0xFB, 0x20, 0x55, 0x5B, 0xCF, 0x11, 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B
+};
 
-            if(pkt->stream_index == stream_index)
-               break;
-        }
-    }
+const ff_asf_guid ff_asf_command_stream = {
+    0xC0, 0xCF, 0xDA, 0x59, 0xE6, 0x59, 0xD0, 0x11, 0xA3, 0xAC, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6
+};
 
-    *ppos= pos;
-//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
+const ff_asf_guid ff_asf_comment_header = {
+    0x33, 0x26, 0xb2, 0x75, 0x8E, 0x66, 0xCF, 0x11, 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c
+};
 
-    return pts;
-}
+const ff_asf_guid ff_asf_codec_comment_header = {
+    0x40, 0x52, 0xD1, 0x86, 0x1D, 0x31, 0xD0, 0x11, 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6
+};
+const ff_asf_guid ff_asf_codec_comment1_header = {
+    0x41, 0x52, 0xd1, 0x86, 0x1D, 0x31, 0xD0, 0x11, 0xa3, 0xa4, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6
+};
 
-static void asf_build_simple_index(AVFormatContext *s, int stream_index)
-{
-    GUID g;
-    ASFContext *asf = s->priv_data;
-    int64_t gsize, itime;
-    int64_t pos, current_pos, index_pts;
-    int i;
-    int pct,ict;
+const ff_asf_guid ff_asf_data_header = {
+    0x36, 0x26, 0xb2, 0x75, 0x8E, 0x66, 0xCF, 0x11, 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c
+};
 
-    current_pos = url_ftell(s->pb);
+const ff_asf_guid ff_asf_head1_guid = {
+    0xb5, 0x03, 0xbf, 0x5f, 0x2E, 0xA9, 0xCF, 0x11, 0x8e, 0xe3, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65
+};
 
-    url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
-    get_guid(s->pb, &g);
-    if (!memcmp(&g, &index_guid, sizeof(GUID))) {
-        gsize = get_le64(s->pb);
-        get_guid(s->pb, &g);
-        itime=get_le64(s->pb);
-        pct=get_le32(s->pb);
-        ict=get_le32(s->pb);
-        av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
+const ff_asf_guid ff_asf_head2_guid = {
+    0x11, 0xd2, 0xd3, 0xab, 0xBA, 0xA9, 0xCF, 0x11, 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65
+};
 
-        for (i=0;i<ict;i++){
-            int pktnum=get_le32(s->pb);
-            int pktct =get_le16(s->pb);
-            av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
+const ff_asf_guid ff_asf_extended_content_header = {
+        0x40, 0xA4, 0xD0, 0xD2, 0x07, 0xE3, 0xD2, 0x11, 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5E, 0xA8, 0x50
+};
 
-            pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
-            index_pts=av_rescale(itime, i, 10000);
+const ff_asf_guid ff_asf_simple_index_header = {
+        0x90, 0x08, 0x00, 0x33, 0xB1, 0xE5, 0xCF, 0x11, 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB
+};
 
-            av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
-        }
-        asf->index_read= 1;
-    }
-    url_fseek(s->pb, current_pos, SEEK_SET);
-}
+const ff_asf_guid ff_asf_ext_stream_embed_stream_header = {
+        0xe2, 0x65, 0xfb, 0x3a, 0xEF, 0x47, 0xF2, 0x40, 0xac, 0x2c, 0x70, 0xa9, 0x0d, 0x71, 0xd3, 0x43
+};
 
-static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
-{
-    ASFContext *asf = s->priv_data;
-    AVStream *st = s->streams[stream_index];
-    int64_t pos;
-    int index;
+const ff_asf_guid ff_asf_ext_stream_audio_stream = {
+        0x9d, 0x8c, 0x17, 0x31, 0xE1, 0x03, 0x28, 0x45, 0xb5, 0x82, 0x3d, 0xf9, 0xdb, 0x22, 0xf5, 0x03
+};
 
-    if (asf->packet_size <= 0)
-        return -1;
+const ff_asf_guid ff_asf_metadata_header = {
+        0xea, 0xcb, 0xf8, 0xc5, 0xaf, 0x5b, 0x77, 0x48, 0x84, 0x67, 0xaa, 0x8c, 0x44, 0xfa, 0x4c, 0xca
+};
 
-    /* Try using the protocol's read_seek if available */
-    if(s->pb) {
-        int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
-        if(ret >= 0)
-            asf_reset_header(s);
-        if (ret != AVERROR(ENOSYS))
-            return ret;
-    }
+const ff_asf_guid ff_asf_marker_header = {
+        0x01, 0xCD, 0x87, 0xF4, 0x51, 0xA9, 0xCF, 0x11, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65
+};
 
-    if (!asf->index_read)
-        asf_build_simple_index(s, stream_index);
+/* I am not a number !!! This GUID is the one found on the PC used to
+   generate the stream */
+const ff_asf_guid ff_asf_my_guid = {
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
 
-    if(!(asf->index_read && st->index_entries)){
-        if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
-            return -1;
-    }else{
-        index= av_index_search_timestamp(st, pts, flags);
-        if(index<0)
-            return -1;
+const ff_asf_guid ff_asf_language_guid = {
+    0xa9, 0x46, 0x43, 0x7c, 0xe0, 0xef, 0xfc, 0x4b, 0xb2, 0x29, 0x39, 0x3e, 0xde, 0x41, 0x5c, 0x85
+};
 
-        /* find the position */
-        pos = st->index_entries[index].pos;
-        pts = st->index_entries[index].timestamp;
+const ff_asf_guid ff_asf_content_encryption = {
+    0xfb, 0xb3, 0x11, 0x22, 0x23, 0xbd, 0xd2, 0x11, 0xb4, 0xb7, 0x00, 0xa0, 0xc9, 0x55, 0xfc, 0x6e
+};
 
-    // various attempts to find key frame have failed so far
-    //    asf_reset_header(s);
-    //    url_fseek(s->pb, pos, SEEK_SET);
-    //    key_pos = pos;
-    //     for(i=0;i<16;i++){
-    //         pos = url_ftell(s->pb);
-    //         if (av_read_frame(s, &pkt) < 0){
-    //             av_log(s, AV_LOG_INFO, "seek failed\n");
-    //             return -1;
-    //         }
-    //         asf_st = s->streams[stream_index]->priv_data;
-    //         pos += st->parser->frame_offset;
-    //
-    //         if (pkt.size > b) {
-    //             b = pkt.size;
-    //             key_pos = pos;
-    //         }
-    //
-    //         av_free_packet(&pkt);
-    //     }
+const ff_asf_guid ff_asf_ext_content_encryption = {
+    0x14, 0xe6, 0x8a, 0x29, 0x22, 0x26, 0x17, 0x4c, 0xb9, 0x35, 0xda, 0xe0, 0x7e, 0xe9, 0x28, 0x9c
+};
 
-        /* do the seek */
-        av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
-        url_fseek(s->pb, pos, SEEK_SET);
-    }
-    asf_reset_header(s);
-    return 0;
-}
+const ff_asf_guid ff_asf_digital_signature = {
+    0xfc, 0xb3, 0x11, 0x22, 0x23, 0xbd, 0xd2, 0x11, 0xb4, 0xb7, 0x00, 0xa0, 0xc9, 0x55, 0xfc, 0x6e
+};
 
-AVInputFormat asf_demuxer = {
-    "asf",
-    NULL_IF_CONFIG_SMALL("ASF format"),
-    sizeof(ASFContext),
-    asf_probe,
-    asf_read_header,
-    asf_read_packet,
-    asf_read_close,
-    asf_read_seek,
-    asf_read_pts,
+/* List of official tags at http://msdn.microsoft.com/en-us/library/dd743066(VS.85).aspx */
+const AVMetadataConv ff_asf_metadata_conv[] = {
+    { "WM/AlbumArtist"     , "album_artist"},
+    { "WM/AlbumTitle"      , "album"       },
+    { "Author"             , "artist"      },
+    { "Description"        , "comment"     },
+    { "WM/Composer"        , "composer"    },
+    { "WM/EncodedBy"       , "encoded_by"  },
+    { "WM/EncodingSettings", "encoder"     },
+    { "WM/Genre"           , "genre"       },
+    { "WM/Language"        , "language"    },
+    { "WM/OriginalFilename", "filename"    },
+    { "WM/PartOfSet"       , "disc"        },
+    { "WM/Publisher"       , "publisher"   },
+    { "WM/Tool"            , "encoder"     },
+    { "WM/TrackNumber"     , "track"       },
+    { "WM/Track"           , "track"       },
+    { "WM/MediaStationCallSign", "service_provider" },
+    { "WM/MediaStationName", "service_name" },
+//  { "Year"               , "date"        }, TODO: conversion year<->date
+    { 0 }
 };