libmpdemux/asf.h

   1 #ifndef ASF_H
   2 #define ASF_H
   3
   4 //#include "config.h"   /* for WORDS_BIGENDIAN */
   5 #include <inttypes.h>
   6 #include "libavutil/common.h"
   7 #include "mpbswap.h"
   8
   9 ///////////////////////
  10 // MS GUID definition
  11 ///////////////////////
  12 #ifndef GUID_DEFINED
  13 #define GUID_DEFINED
  14 // Size of GUID is 16 bytes!
  15 typedef struct __attribute__((packed)) {
  16         uint32_t        Data1;          // 4 bytes
  17         uint16_t        Data2;          // 2 bytes
  18         uint16_t        Data3;          // 2 bytes
  19         uint8_t         Data4[8];       // 8 bytes
  20 } GUID_t;
  21 #endif
  22
  23 ///////////////////////
  24 // ASF Object Header
  25 ///////////////////////
  26 typedef struct __attribute__((packed)) {
  27   uint8_t guid[16];
  28   uint64_t size;
  29 } ASF_obj_header_t;
  30
  31 ////////////////
  32 // ASF Header
  33 ////////////////
  34 typedef struct __attribute__((packed)) {
  35   ASF_obj_header_t objh;
  36   uint32_t cno; // number of subchunks
  37   uint8_t v1; // unknown (0x01)
  38   uint8_t v2; // unknown (0x02)
  39 } ASF_header_t;
  40
  41 /////////////////////
  42 // ASF File Header
  43 /////////////////////
  44 typedef struct __attribute__((packed)) {
  45   uint8_t stream_id[16]; // stream GUID
  46   uint64_t file_size;
  47   uint64_t creation_time; //File creation time FILETIME 8
  48   uint64_t num_packets;    //Number of packets UINT64 8
  49   uint64_t play_duration; //Timestamp of the end position UINT64 8
  50   uint64_t send_duration;  //Duration of the playback UINT64 8
  51   uint64_t preroll; //Time to bufferize before playing UINT32 4
  52   uint32_t flags; //Unknown, maybe flags ( usually contains 2 ) UINT32 4
  53   uint32_t min_packet_size; //Min size of the packet, in bytes UINT32 4
  54   uint32_t max_packet_size; //Max size of the packet  UINT32 4
  55   uint32_t max_bitrate; //Maximum bitrate of the media (sum of all the stream)
  56 } ASF_file_header_t;
  57
  58 ///////////////////////
  59 // ASF Stream Header
  60 ///////////////////////
  61 typedef struct __attribute__((packed)) {
  62   uint8_t type[16]; // Stream type (audio/video) GUID 16
  63   uint8_t concealment[16]; // Audio error concealment type GUID 16
  64   uint64_t unk1; // Unknown, maybe reserved ( usually contains 0 ) UINT64 8
  65   uint32_t type_size; //Total size of type-specific data UINT32 4
  66   uint32_t stream_size; //Size of stream-specific data UINT32 4
  67   uint16_t stream_no; //Stream number UINT16 2
  68   uint32_t unk2; //Unknown UINT32 4
  69 } ASF_stream_header_t;
  70
  71 ///////////////////////////
  72 // ASF Content Description
  73 ///////////////////////////
  74 typedef struct  __attribute__((packed)) {
  75   uint16_t title_size;
  76   uint16_t author_size;
  77   uint16_t copyright_size;
  78   uint16_t comment_size;
  79   uint16_t rating_size;
  80 } ASF_content_description_t;
  81
  82 ////////////////////////
  83 // ASF Segment Header
  84 ////////////////////////
  85 typedef struct __attribute__((packed)) {
  86   uint8_t streamno;
  87   uint8_t seq;
  88   uint32_t x;
  89   uint8_t flag;
  90 } ASF_segmhdr_t;
  91
  92 //////////////////////
  93 // ASF Stream Chunck
  94 //////////////////////
  95 typedef struct __attribute__((packed)) {
  96         uint16_t        type;
  97         uint16_t        size;
  98         uint32_t        sequence_number;
  99         uint16_t        unknown;
 100         uint16_t        size_confirm;
 101 } ASF_stream_chunck_t;
 102
 103 // Definition of the stream type
 104 #ifdef WORDS_BIGENDIAN
 105         #define ASF_STREAMING_CLEAR     0x2443          // $C
 106         #define ASF_STREAMING_DATA      0x2444          // $D
 107         #define ASF_STREAMING_END_TRANS 0x2445          // $E
 108         #define ASF_STREAMING_HEADER    0x2448          // $H
 109 #else
 110         #define ASF_STREAMING_CLEAR     0x4324          // $C
 111         #define ASF_STREAMING_DATA      0x4424          // $D
 112         #define ASF_STREAMING_END_TRANS 0x4524          // $E
 113         #define ASF_STREAMING_HEADER    0x4824          // $H
 114 #endif
 115
 116 // Definition of the differents type of ASF streaming
 117 typedef enum {
 118         ASF_Unknown_e,
 119         ASF_Live_e,
 120         ASF_Prerecorded_e,
 121         ASF_Redirector_e,
 122         ASF_PlainText_e,
 123         ASF_Authenticate_e
 124 } ASF_StreamType_e;
 125
 126 typedef struct {
 127         ASF_StreamType_e streaming_type;
 128         int request;
 129         int packet_size;
 130         int *audio_streams,n_audio,*video_streams,n_video;
 131         int audio_id, video_id;
 132 } asf_http_streaming_ctrl_t;
 133
 134
 135 /*
 136  * Some macros to swap little endian structures read from an ASF file
 137  * into machine endian format
 138  */
 139 #ifdef WORDS_BIGENDIAN
 140 #define le2me_ASF_obj_header_t(h) {                                     \
 141     (h)->size = le2me_64((h)->size);                                    \
 142 }
 143 #define le2me_ASF_header_t(h) {                                         \
 144     le2me_ASF_obj_header_t(&(h)->objh);                                 \
 145     (h)->cno = le2me_32((h)->cno);                                      \
 146 }
 147 #define le2me_ASF_stream_header_t(h) {                                  \
 148     (h)->unk1 = le2me_64((h)->unk1);                                    \
 149     (h)->type_size = le2me_32((h)->type_size);                          \
 150     (h)->stream_size = le2me_32((h)->stream_size);                      \
 151     (h)->stream_no = le2me_16((h)->stream_no);                          \
 152     (h)->unk2 = le2me_32((h)->unk2);                                    \
 153 }
 154 #define le2me_ASF_file_header_t(h) {                                    \
 155     (h)->file_size = le2me_64((h)->file_size);                          \
 156     (h)->creation_time = le2me_64((h)->creation_time);                  \
 157     (h)->num_packets = le2me_64((h)->num_packets);                      \
 158     (h)->play_duration = le2me_64((h)->play_duration);                  \
 159     (h)->send_duration = le2me_64((h)->send_duration);                  \
 160     (h)->preroll = le2me_64((h)->preroll);                              \
 161     (h)->flags = le2me_32((h)->flags);                                  \
 162     (h)->min_packet_size = le2me_32((h)->min_packet_size);              \
 163     (h)->max_packet_size = le2me_32((h)->max_packet_size);              \
 164     (h)->max_bitrate = le2me_32((h)->max_bitrate);                      \
 165 }
 166 #define le2me_ASF_content_description_t(h) {                            \
 167     (h)->title_size = le2me_16((h)->title_size);                        \
 168     (h)->author_size = le2me_16((h)->author_size);                      \
 169     (h)->copyright_size = le2me_16((h)->copyright_size);                \
 170     (h)->comment_size = le2me_16((h)->comment_size);                    \
 171     (h)->rating_size = le2me_16((h)->rating_size);                      \
 172 }
 173 #define le2me_BITMAPINFOHEADER(h) {                                     \
 174     (h)->biSize = le2me_32((h)->biSize);                                \
 175     (h)->biWidth = le2me_32((h)->biWidth);                              \
 176     (h)->biHeight = le2me_32((h)->biHeight);                            \
 177     (h)->biPlanes = le2me_16((h)->biPlanes);                            \
 178     (h)->biBitCount = le2me_16((h)->biBitCount);                        \
 179     (h)->biCompression = le2me_32((h)->biCompression);                  \
 180     (h)->biSizeImage = le2me_32((h)->biSizeImage);                      \
 181     (h)->biXPelsPerMeter = le2me_32((h)->biXPelsPerMeter);              \
 182     (h)->biYPelsPerMeter = le2me_32((h)->biYPelsPerMeter);              \
 183     (h)->biClrUsed = le2me_32((h)->biClrUsed);                          \
 184     (h)->biClrImportant = le2me_32((h)->biClrImportant);                \
 185 }
 186 #define le2me_WAVEFORMATEX(h) {                                         \
 187     (h)->wFormatTag = le2me_16((h)->wFormatTag);                        \
 188     (h)->nChannels = le2me_16((h)->nChannels);                          \
 189     (h)->nSamplesPerSec = le2me_32((h)->nSamplesPerSec);                \
 190     (h)->nAvgBytesPerSec = le2me_32((h)->nAvgBytesPerSec);              \
 191     (h)->nBlockAlign = le2me_16((h)->nBlockAlign);                      \
 192     (h)->wBitsPerSample = le2me_16((h)->wBitsPerSample);                \
 193     (h)->cbSize = le2me_16((h)->cbSize);                                \
 194 }
 195 #define le2me_ASF_stream_chunck_t(h) {                                  \
 196     (h)->size = le2me_16((h)->size);                                    \
 197     (h)->sequence_number = le2me_32((h)->sequence_number);              \
 198     (h)->unknown = le2me_16((h)->unknown);                              \
 199     (h)->size_confirm = le2me_16((h)->size_confirm);                    \
 200 }
 201 #else
 202 #define le2me_ASF_obj_header_t(h)       /**/
 203 #define le2me_ASF_header_t(h)           /**/
 204 #define le2me_ASF_stream_header_t(h)    /**/
 205 #define le2me_ASF_file_header_t(h)      /**/
 206 #define le2me_ASF_content_description_t(h) /**/
 207 #define le2me_BITMAPINFOHEADER(h)   /**/
 208 #define le2me_WAVEFORMATEX(h)       /**/
 209 #define le2me_ASF_stream_chunck_t(h) /**/
 210 #endif
 211
 212 // priv struct for the demuxer
 213 struct asf_priv {
 214     ASF_header_t header;
 215     unsigned char* packet;
 216     int scrambling_h;
 217     int scrambling_w;
 218     int scrambling_b;
 219     unsigned packetsize;
 220     double   packetrate;
 221     unsigned movielength;
 222     int asf_is_dvr_ms;
 223     uint32_t asf_frame_state;
 224     int asf_frame_start_found;
 225     double dvr_last_vid_pts;
 226     uint64_t vid_frame_ct;
 227     uint64_t play_duration;
 228     uint64_t num_packets;
 229     int new_vid_frame_seg;
 230     int *vid_repdata_sizes;
 231     int *aud_repdata_sizes;
 232     int vid_repdata_count;
 233     int aud_repdata_count;
 234     uint64_t avg_vid_frame_time;
 235     uint64_t last_key_payload_time;
 236     uint64_t last_aud_pts;
 237     uint64_t last_aud_diff;
 238     int found_first_key_frame;
 239     uint32_t last_vid_seq;
 240     int vid_ext_timing_index;
 241     int aud_ext_timing_index;
 242     int vid_ext_frame_index;
 243     int know_frame_time;
 244     unsigned bps;
 245 };
 246
 247 #endif /* ASF_H */