remove a few unused and duplicated variables

Originally committed as revision 7642 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/asf.c

@@ -155,7 +155,7 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
             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->nb_packets             = get_le64(pb);
             asf->hdr.send_time          = get_le64(pb);
             asf->hdr.play_time          = get_le64(pb);
             asf->hdr.preroll            = get_le32(pb);
@@ -165,7 +165,6 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
             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, type_specific_size, sizeX;
             uint64_t total_size;
@@ -236,8 +235,8 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
                     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);
+                    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,

libavformat/asf.h

@@ -31,8 +31,6 @@ typedef struct {
     int ds_span;                /* descrambling  */
     int ds_packet_size;
     int ds_chunk_size;
-    int ds_data_size;
-    int ds_silence_data;
 
     int64_t packet_pos;
 
@@ -46,8 +44,6 @@ typedef struct {
                                 // invalid if broadcasting
     uint64_t create_time;       // time of creation, in 100-nanosecond units since 1.1.1601
                                 // invalid if broadcasting
-    uint64_t packets_count;     // how many packets are there in the file
-                                // invalid if broadcasting
     uint64_t play_time;         // play time, in 100-nanosecond units
                                 // invalid if broadcasting
     uint64_t send_time;         // time to send file, in 100-nanosecond units
@@ -81,7 +77,7 @@ typedef struct {
     int asfid2avid[128];        /* conversion table from asf ID 2 AVStream ID */
     ASFStream streams[128];     /* it's max number and it's not that big */
     /* non streamed additonnal info */
-    uint64_t nb_packets;
+    uint64_t nb_packets;                 ///< how many packets are there in the file, invalid if broadcasting
     int64_t duration; /* in 100ns units */
     /* packet filling */
     unsigned char multi_payloads_present;