fix some signedness warnings
[ffmpeg.git] / libavformat / asf.c
index 12d2a5e..7759927 100644 (file)
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #include "avformat.h"
-#include "avi.h"
+#include "riff.h"
 #include "mpegaudio.h"
 #include "asf.h"
 
@@ -25,7 +25,7 @@
 #include <assert.h>
 
 #define FRAME_HEADER_SIZE 17
-// Fix Me! FRAME_HEADER_SIZE may be different. 
+// Fix Me! FRAME_HEADER_SIZE may be different.
 
 static const GUID index_guid = {
     0x33000890, 0xe5b1, 0x11cf, { 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb },
@@ -51,6 +51,7 @@ static void print_guid(const GUID *g)
     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);
@@ -59,6 +60,10 @@ static void print_guid(const GUID *g)
     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
         printf("(GUID: unknown) ");
     printf("0x%08x, 0x%04x, 0x%04x, {", g->v1, g->v2, g->v3);
@@ -66,7 +71,7 @@ static void print_guid(const GUID *g)
         printf(" 0x%02x,", g->v4[i]);
     printf("}\n");
 }
-#undef PRINT_IF_GUID(g,cmp)
+#undef PRINT_IF_GUID
 #endif
 
 static void get_guid(ByteIOContext *s, GUID *g)
@@ -168,23 +173,25 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
             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->hdr.file_size          = get_le64(pb);
+            asf->hdr.create_time        = get_le64(pb);
+            asf->hdr.packets_count      = get_le64(pb);
+            asf->hdr.send_time          = get_le64(pb);
+            asf->hdr.play_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;
+            int type, type_specific_size, sizeX;
+            uint64_t total_size;
             unsigned int tag1;
             int64_t pos1, pos2;
+            int test_for_ext_stream_audio;
 
             pos1 = url_ftell(pb);
 
@@ -197,13 +204,20 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
                 goto fail;
             st->priv_data = asf_st;
             st->start_time = asf->hdr.preroll;
-            st->duration = asf->hdr.send_time / 
+            st->duration = asf->hdr.send_time /
                 (10000000 / 1000) - st->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_UNKNOWN;
+            } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
+                test_for_ext_stream_audio = 1;
+                type = CODEC_TYPE_UNKNOWN;
             } else {
                 goto fail;
             }
@@ -211,32 +225,46 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
             total_size = get_le64(pb);
             type_specific_size = get_le32(pb);
             get_le32(pb);
-           st->id = get_le16(pb) & 0x7f; /* stream id */
+            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 (test_for_ext_stream_audio) {
+                get_guid(pb, &g);
+                if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
+                    type = CODEC_TYPE_AUDIO;
+                    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);
                 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
-               }
+                /* 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;
@@ -256,26 +284,26 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
                     st->codec->frame_size = 1;
                     break;
                 }
-            } else {
-               get_le32(pb);
+            } 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);
+                st->codec->height = get_le32(pb);
                 /* not available for asf */
                 get_le16(pb); /* panes */
-               st->codec->bits_per_sample = get_le16(pb); /* depth */
+                st->codec->bits_per_sample = get_le16(pb); /* depth */
                 tag1 = get_le32(pb);
-               url_fskip(pb, 20);
+                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);
-               }
+                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 */
@@ -293,13 +321,19 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
         }
 
                 st->codec->codec_tag = tag1;
-               st->codec->codec_id = codec_get_id(codec_bmp_tags, 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))) {
+            asf->data_object_offset = url_ftell(pb);
+            if (gsize != (uint64_t)-1 && gsize >= 24) {
+                asf->data_object_size = gsize - 24;
+            } else {
+                asf->data_object_size = (uint64_t)-1;
+            }
             break;
         } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
             int len1, len2, len3, len4, len5;
@@ -313,14 +347,15 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
             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);
+            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;
+                        int name_len,value_type,value_len;
+                        uint64_t value_num = 0;
                         char *name, *value;
 
                         name_len = get_le16(pb);
@@ -346,12 +381,49 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
                         }
                         av_free(name);
                 }
-#if 0
+        } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
+            int ext_len, payload_ext_ct, stream_ct;
+            uint32_t ext_d;
+            int64_t pos_ex_st;
+            pos_ex_st = url_ftell(pb);
+
+            get_le64(pb);
+            get_le64(pb);
+            get_le32(pb);
+            get_le32(pb);
+            get_le32(pb);
+            get_le32(pb);
+            get_le32(pb);
+            get_le32(pb);
+            get_le32(pb);
+            get_le32(pb);
+            get_le16(pb);
+            get_le16(pb);
+            get_le64(pb);
+            stream_ct = get_le16(pb);
+            payload_ext_ct = get_le16(pb);
+
+            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;
@@ -396,10 +468,10 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
  fail:
      for(i=0;i<s->nb_streams;i++) {
         AVStream *st = s->streams[i];
-       if (st) {
-           av_free(st->priv_data);
+        if (st) {
+            av_free(st->priv_data);
             av_free(st->codec->extradata);
-       }
+        }
         av_free(st);
     }
     return -1;
@@ -421,27 +493,25 @@ static int asf_get_packet(AVFormatContext *s)
     uint32_t packet_length, padsize;
     int rsize = 9;
     int c;
-    
-    if((url_ftell(&s->pb) - s->data_offset) % asf->packet_size)
-        return -1;
+
     assert((url_ftell(&s->pb) - s->data_offset) % asf->packet_size == 0);
-    
+
     c = get_byte(pb);
     if (c != 0x82) {
         if (!url_feof(pb))
-           av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%lld\n", c, url_ftell(pb));
+            av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%"PRId64"\n", c, url_ftell(pb));
     }
     if ((c & 0x0f) == 2) { // always true for now
-       if (get_le16(pb) != 0) {
+        if (get_le16(pb) != 0) {
             if (!url_feof(pb))
-               av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
-           return AVERROR_IO;
-       }
+                av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
+            return AVERROR_IO;
+        }
         rsize+=2;
 /*    }else{
         if (!url_feof(pb))
-           printf("ff asf bad header %x  at:%lld\n", c, url_ftell(pb));
-       return AVERROR_IO;*/
+            printf("ff asf bad header %x  at:%lld\n", c, url_ftell(pb));
+        return AVERROR_IO;*/
     }
 
     asf->packet_flags = get_byte(pb);
@@ -456,10 +526,10 @@ static int asf_get_packet(AVFormatContext *s)
     // 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_segsizetype = get_byte(pb); rsize++;
         asf->packet_segments = asf->packet_segsizetype & 0x3f;
     } else {
-       asf->packet_segments = 1;
+        asf->packet_segments = 1;
         asf->packet_segsizetype = 0x80;
     }
     asf->packet_size_left = packet_length - padsize - rsize;
@@ -479,182 +549,187 @@ static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
     ByteIOContext *pb = &s->pb;
     //static int pc = 0;
     for (;;) {
-       int rsize = 0;
-       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:%Ld\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
-           /* fail safe */
-           url_fskip(pb, ret);
+        int rsize = 0;
+        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:%Ld\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
+            if((url_ftell(&s->pb) + ret - s->data_offset) % asf->packet_size)
+                ret += asf->packet_size - ((url_ftell(&s->pb) + ret - s->data_offset) % asf->packet_size);
+            /* fail safe */
+            url_fskip(pb, ret);
             asf->packet_pos= url_ftell(&s->pb);
-           ret = asf_get_packet(s);
-           //printf("READ ASF PACKET  %d   r:%d   c:%d\n", ret, asf->packet_size_left, pc++);
-           if (ret < 0 || url_feof(pb))
-               return AVERROR_IO;
+            if (asf->data_object_size != (uint64_t)-1 &&
+                (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
+                return AVERROR_IO; /* Do not exceed the size of the data object */
+            ret = asf_get_packet(s);
+            //printf("READ ASF PACKET  %d   r:%d   c:%d\n", ret, asf->packet_size_left, pc++);
+            if (ret < 0 || url_feof(pb))
+                return AVERROR_IO;
             asf->packet_time_start = 0;
             continue;
-       }
-       if (asf->packet_time_start == 0) {
-           /* read frame header */
+        }
+        if (asf->packet_time_start == 0) {
+            /* read frame header */
             int num = get_byte(pb);
-           asf->packet_segments--;
-           rsize++;
-           asf->packet_key_frame = (num & 0x80) >> 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);
+            asf->packet_segments--;
+            rsize++;
+            asf->packet_key_frame = (num & 0x80) >> 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 > 1) {
+            if (asf->packet_replic_size > 1) {
                 assert(asf->packet_replic_size >= 8);
                 // it should be always at least 8 bytes - FIXME validate
-               asf->packet_obj_size = get_le32(pb);
-               asf->packet_frag_timestamp = get_le32(pb); // timestamp
-               if (asf->packet_replic_size > 8)
-                   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 begining timestamp
-               asf->packet_time_start = asf->packet_frag_offset;
+                asf->packet_obj_size = get_le32(pb);
+                asf->packet_frag_timestamp = get_le32(pb); // timestamp
+                if (asf->packet_replic_size > 8)
+                    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 begining timestamp
+                asf->packet_time_start = asf->packet_frag_offset;
                 asf->packet_frag_offset = 0;
-               asf->packet_frag_timestamp = asf->packet_timestamp;
+                asf->packet_frag_timestamp = asf->packet_timestamp;
 
                 asf->packet_time_delta = get_byte(pb);
-               rsize++;
-           }else{
+                rsize++;
+            }else{
                 assert(asf->packet_replic_size==0);
             }
-           if (asf->packet_flags & 0x01) {
-               DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
+            if (asf->packet_flags & 0x01) {
+                DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
 #undef DO_2BITS
-               //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) {
-                   asf->packet_segments = 0;
+                //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) {
+                    asf->packet_segments = 0;
                     continue;
-               }
-           }
-           asf->packet_size_left -= rsize;
-           //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
+                }
+            }
+            asf->packet_size_left -= rsize;
+            //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
 
-           if (asf->stream_index < 0
+            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;
+                /* 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  %d\n", asf->packet_frag_size, num & 0x7f);
                 continue;
-           }
-           asf->asf_st = s->streams[asf->stream_index]->priv_data;
-       }
-       asf_st = asf->asf_st;
-
-       if ((asf->packet_frag_offset != asf_st->frag_offset
-            || (asf->packet_frag_offset
-                && asf->packet_seq != asf_st->seq)) // seq should be ignored
-          ) {
-           /* cannot continue current packet: free it */
-           // FIXME better check if packet was already allocated
-           av_log(s, AV_LOG_INFO, "ff asf parser skips: %d - %d     o:%d - %d    %d %d   fl:%d\n",
-                  asf_st->pkt.size,
-                  asf->packet_obj_size,
-                  asf->packet_frag_offset, asf_st->frag_offset,
-                  asf->packet_seq, asf_st->seq, asf->packet_frag_size);
-           if (asf_st->pkt.size)
-               av_free_packet(&asf_st->pkt);
-           asf_st->frag_offset = 0;
-           if (asf->packet_frag_offset != 0) {
-               url_fskip(pb, asf->packet_frag_size);
-               av_log(s, AV_LOG_INFO, "ff asf parser skipping %db\n", asf->packet_frag_size);
-               asf->packet_size_left -= asf->packet_frag_size;
-               continue;
-           }
-       }
-       if (asf->packet_replic_size == 1) {
-           // frag_offset is here used as the begining 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->asf_st = s->streams[asf->stream_index]->priv_data;
+        }
+        asf_st = asf->asf_st;
+
+        if ((asf->packet_frag_offset != asf_st->frag_offset
+             || (asf->packet_frag_offset
+                 && asf->packet_seq != asf_st->seq)) // seq should be ignored
+           ) {
+            /* cannot continue current packet: free it */
+            // FIXME better check if packet was already allocated
+            av_log(s, AV_LOG_INFO, "ff asf parser skips: %d - %d     o:%d - %d    %d %d   fl:%d\n",
+                   asf_st->pkt.size,
+                   asf->packet_obj_size,
+                   asf->packet_frag_offset, asf_st->frag_offset,
+                   asf->packet_seq, asf_st->seq, asf->packet_frag_size);
+            if (asf_st->pkt.size)
+                av_free_packet(&asf_st->pkt);
+            asf_st->frag_offset = 0;
+            if (asf->packet_frag_offset != 0) {
+                url_fskip(pb, asf->packet_frag_size);
+                av_log(s, AV_LOG_INFO, "ff asf parser skipping %db\n", asf->packet_frag_size);
+                asf->packet_size_left -= asf->packet_frag_size;
+                continue;
+            }
+        }
+        if (asf->packet_replic_size == 1) {
+            // frag_offset is here used as the begining 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;
+            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_st->frag_offset == 0) {
-           /* new packet */
-           av_new_packet(&asf_st->pkt, asf->packet_obj_size);
-           asf_st->seq = asf->packet_seq;
-           asf_st->pkt.pts = 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->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_st->frag_offset == 0) {
+            /* new packet */
+            av_new_packet(&asf_st->pkt, asf->packet_obj_size);
+            asf_st->seq = asf->packet_seq;
+            asf_st->pkt.pts = 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)
+            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;
-       get_buffer(pb, 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) {
-           /* return packet */
-           if (asf_st->ds_span > 1) {
-               /* packet descrambling */
-               char* 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);
-                       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;
-           memcpy(pkt, &asf_st->pkt, sizeof(AVPacket));
-           //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
-       }
+        get_buffer(pb, 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) {
+            /* return packet */
+            if (asf_st->ds_span > 1) {
+                /* 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);
+                        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;
+            memcpy(pkt, &asf_st->pkt, sizeof(AVPacket));
+            //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;
 }
@@ -664,9 +739,8 @@ static int asf_read_close(AVFormatContext *s)
     int i;
 
     for(i=0;i<s->nb_streams;i++) {
-       AVStream *st = s->streams[i];
-       av_free(st->priv_data);
-       av_free(st->codec->extradata);
+        AVStream *st = s->streams[i];
+        av_free(st->priv_data);
     av_free(st->codec->palctrl);
     }
     return 0;
@@ -702,7 +776,7 @@ static void asf_reset_header(AVFormatContext *s)
     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);
@@ -721,24 +795,24 @@ static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos,
     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;
     }
-    
+
     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);
-    
+
 //printf("asf_read_pts\n");
     asf_reset_header(s);
     for(;;){
         if (av_read_frame(s, pkt) < 0){
             av_log(s, AV_LOG_INFO, "seek failed\n");
-           return AV_NOPTS_VALUE;
+            return AV_NOPTS_VALUE;
         }
-        
-        pts= pkt->pts * 1000 / AV_TIME_BASE;
+
+        pts= pkt->pts;
 
         av_free_packet(pkt);
         if(pkt->flags&PKT_FLAG_KEY){
@@ -749,9 +823,9 @@ static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos,
             assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
             pos= asf_st->packet_pos;
 
-            av_add_index_entry(s->streams[i], pos, pts, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
+            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;
-            
+
             if(pkt->stream_index == stream_index)
                break;
         }
@@ -763,21 +837,97 @@ static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos,
     return pts;
 }
 
+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;
+
+    current_pos = url_ftell(&s->pb);
+
+    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%Lx, pct:%d, ict:%d\n",itime,pct,ict);
+
+        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);
+
+            pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
+            index_pts=av_rescale(itime, i, 10000);
+
+            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);
+}
+
 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
 {
     ASFContext *asf = s->priv_data;
-    
-    if (asf->packet_size <= 0)
-        return -1;
+    AVStream *st = s->streams[stream_index];
+    int64_t pos;
+    int index;
 
-    if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
+    if (asf->packet_size <= 0)
         return -1;
 
+    if (!asf->index_read)
+        asf_build_simple_index(s, stream_index);
+
+    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;
+
+        /* find the position */
+        pos = st->index_entries[index].pos;
+        pts = st->index_entries[index].timestamp;
+
+    // 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);
+    //     }
+
+        /* do the seek */
+        av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %Ld\n", pos);
+        url_fseek(&s->pb, pos, SEEK_SET);
+    }
     asf_reset_header(s);
     return 0;
 }
 
-static AVInputFormat asf_iformat = {
+AVInputFormat asf_demuxer = {
     "asf",
     "asf format",
     sizeof(ASFContext),
@@ -788,18 +938,3 @@ static AVInputFormat asf_iformat = {
     asf_read_seek,
     asf_read_pts,
 };
-
-#ifdef CONFIG_ENCODERS
-    extern AVOutputFormat asf_oformat;
-    extern AVOutputFormat asf_stream_oformat;
-#endif //CONFIG_ENCODERS
-
-int asf_init(void)
-{
-    av_register_input_format(&asf_iformat);
-#ifdef CONFIG_ENCODERS
-    av_register_output_format(&asf_oformat);
-    av_register_output_format(&asf_stream_oformat);
-#endif //CONFIG_ENCODERS
-    return 0;
-}