rmff.c

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      mdpr=rmff_scan_mdpr(ptr);
      chunk_size=mdpr->size;
      header->streams[mdpr->stream_number]=mdpr;
      break;
    case CONT_TAG:
      header->cont=rmff_scan_cont(ptr);
      chunk_size=header->cont->size;
      break;
    case DATA_TAG:
      header->data=rmff_scan_dataheader(ptr);
      chunk_size=34;     /* hard coded header size */
      break;
    default:
      mp_msg(MSGT_STREAM, MSGL_WARN, "unknown chunk\n");
      hexdump(ptr,10);
      chunk_size=1;
      break;
    }
    ptr+=chunk_size;
  }

	return header;
}

rmff_header_t *rmff_scan_header_stream(int fd) {

  rmff_header_t *header;
  char *buf=xbuffer_init(1024);
  int index=0;
  uint32_t chunk_type;
  uint32_t chunk_size;

  do {
    buf = xbuffer_ensure_size(buf, index+8);
    recv(fd, buf+index, 8, 0);
    chunk_type=AV_RB32(buf+index); index+=4;
    chunk_size=AV_RB32(buf+index); index+=4;

    switch (chunk_type) {
      case DATA_TAG:
        chunk_size=18;
      case MDPR_TAG:
      case CONT_TAG:
      case RMF_TAG:
      case PROP_TAG:
        buf = xbuffer_ensure_size(buf, index+chunk_size-8);
        recv(fd, buf+index, (chunk_size-8), 0);
	index+=(chunk_size-8);
        break;
      default:
        mp_msg(MSGT_STREAM, MSGL_WARN, "rmff_scan_header_stream: unknown chunk");
        hexdump(buf+index-8, 8);
        chunk_type=DATA_TAG;
    }
  } while (chunk_type != DATA_TAG);

  header = rmff_scan_header(buf);

  xbuffer_free(buf);

  return header;
}

void rmff_scan_pheader(rmff_pheader_t *h, char *data) {

  h->object_version=AV_RB16(data);
  h->length=AV_RB16(data+2);
  h->stream_number=AV_RB16(data+4);
  h->timestamp=AV_RB32(data+6);
  h->reserved=(uint8_t)data[10];
  h->flags=(uint8_t)data[11];
}

rmff_fileheader_t *rmff_new_fileheader(uint32_t num_headers) {

  rmff_fileheader_t *fileheader=malloc(sizeof(rmff_fileheader_t));

  fileheader->object_id=RMF_TAG;
  fileheader->size=18;
  fileheader->object_version=0;
  fileheader->file_version=0;
  fileheader->num_headers=num_headers;

  return fileheader;
}

rmff_prop_t *rmff_new_prop (
    uint32_t max_bit_rate,
    uint32_t avg_bit_rate,
    uint32_t max_packet_size,
    uint32_t avg_packet_size,
    uint32_t num_packets,
    uint32_t duration,
    uint32_t preroll,
    uint32_t index_offset,
    uint32_t data_offset,
    uint16_t num_streams,
    uint16_t flags ) {

  rmff_prop_t *prop=malloc(sizeof(rmff_prop_t));

  prop->object_id=PROP_TAG;
  prop->size=50;
  prop->object_version=0;

  prop->max_bit_rate=max_bit_rate;
  prop->avg_bit_rate=avg_bit_rate;
  prop->max_packet_size=max_packet_size;
  prop->avg_packet_size=avg_packet_size;
  prop->num_packets=num_packets;
  prop->duration=duration;
  prop->preroll=preroll;
  prop->index_offset=index_offset;
  prop->data_offset=data_offset;
  prop->num_streams=num_streams;
  prop->flags=flags;
   
  return prop;
}

rmff_mdpr_t *rmff_new_mdpr(
      uint16_t   stream_number,
      uint32_t   max_bit_rate,
      uint32_t   avg_bit_rate,
      uint32_t   max_packet_size,
      uint32_t   avg_packet_size,
      uint32_t   start_time,
      uint32_t   preroll,
      uint32_t   duration,
      const char *stream_name,
      const char *mime_type,
      uint32_t   type_specific_len,
      const char *type_specific_data ) {

  rmff_mdpr_t *mdpr=malloc(sizeof(rmff_mdpr_t));
  
  mdpr->object_id=MDPR_TAG;
  mdpr->object_version=0;

  mdpr->stream_number=stream_number;
  mdpr->max_bit_rate=max_bit_rate;
  mdpr->avg_bit_rate=avg_bit_rate;
  mdpr->max_packet_size=max_packet_size;
  mdpr->avg_packet_size=avg_packet_size;
  mdpr->start_time=start_time;
  mdpr->preroll=preroll;
  mdpr->duration=duration;
  mdpr->stream_name_size=0;
  if (stream_name) {
    mdpr->stream_name=strdup(stream_name);
    mdpr->stream_name_size=strlen(stream_name);
  }
  mdpr->mime_type_size=0;
  if (mime_type) {
    mdpr->mime_type=strdup(mime_type);
    mdpr->mime_type_size=strlen(mime_type);
  }
  mdpr->type_specific_len=type_specific_len;
  mdpr->type_specific_data=malloc(type_specific_len);
  memcpy(mdpr->type_specific_data,type_specific_data,type_specific_len);
  mdpr->mlti_data=NULL;
  
  mdpr->size=mdpr->stream_name_size+mdpr->mime_type_size+mdpr->type_specific_len+46;

  return mdpr;
}

rmff_cont_t *rmff_new_cont(const char *title, const char *author, const char *copyright, const char *comment) {

  rmff_cont_t *cont=malloc(sizeof(rmff_cont_t));

  cont->object_id=CONT_TAG;
  cont->object_version=0;

  cont->title=NULL;
  cont->author=NULL;
  cont->copyright=NULL;
  cont->comment=NULL;
  
  cont->title_len=0;
  cont->author_len=0;
  cont->copyright_len=0;
  cont->comment_len=0;

  if (title) {
    cont->title_len=strlen(title);
    cont->title=strdup(title);
  }
  if (author) {
    cont->author_len=strlen(author);
    cont->author=strdup(author);
  }
  if (copyright) {
    cont->copyright_len=strlen(copyright);
    cont->copyright=strdup(copyright);
  }
  if (comment) {
    cont->comment_len=strlen(comment);
    cont->comment=strdup(comment);
  }
  cont->size=cont->title_len+cont->author_len+cont->copyright_len+cont->comment_len+18;

  return cont;
}

rmff_data_t *rmff_new_dataheader(uint32_t num_packets, uint32_t next_data_header) {

  rmff_data_t *data=malloc(sizeof(rmff_data_t));

  data->object_id=DATA_TAG;
  data->size=18;
  data->object_version=0;
  data->num_packets=num_packets;
  data->next_data_header=next_data_header;

  return data;
}
  
void rmff_print_header(rmff_header_t *h) {

  rmff_mdpr_t **stream;
  
  if(!h) {
    printf("rmff_print_header: NULL given\n");
    return;
  }
  if(h->fileheader)
  {
    printf("\nFILE:\n");
    printf("file version      : %d\n", h->fileheader->file_version);
    printf("number of headers : %d\n", h->fileheader->num_headers);
  }
  if(h->cont)
  {
    printf("\nCONTENT:\n");
    printf("title     : %s\n", h->cont->title);
    printf("author    : %s\n", h->cont->author);
    printf("copyright : %s\n", h->cont->copyright);
    printf("comment   : %s\n", h->cont->comment);
  }
  if(h->prop)
  {
    printf("\nSTREAM PROPERTIES:\n");
    printf("bit rate (max/avg)    : %i/%i\n", h->prop->max_bit_rate, h->prop->avg_bit_rate);
    printf("packet size (max/avg) : %i/%i bytes\n", h->prop->max_packet_size, h->prop->avg_packet_size);
    printf("packets       : %i\n", h->prop->num_packets);
    printf("duration      : %i ms\n", h->prop->duration);
    printf("pre-buffer    : %i ms\n", h->prop->preroll);
    printf("index offset  : %i bytes\n", h->prop->index_offset);
    printf("data offset   : %i bytes\n", h->prop->data_offset);
    printf("media streams : %i\n", h->prop->num_streams);
    printf("flags         : ");
    if (h->prop->flags & PN_SAVE_ENABLED) printf("save_enabled ");
    if (h->prop->flags & PN_PERFECT_PLAY_ENABLED) printf("perfect_play_enabled ");
    if (h->prop->flags & PN_LIVE_BROADCAST) printf("live_broadcast ");
    printf("\n");
  }
  stream=h->streams;
  if(stream)
  {
    while (*stream)
    {
      printf("\nSTREAM %i:\n", (*stream)->stream_number);
      printf("stream name [mime type] : %s [%s]\n", (*stream)->stream_name, (*stream)->mime_type);
      printf("bit rate (max/avg)      : %i/%i\n", (*stream)->max_bit_rate, (*stream)->avg_bit_rate);
      printf("packet size (max/avg)   : %i/%i bytes\n", (*stream)->max_packet_size, (*stream)->avg_packet_size);
      printf("start time : %i\n", (*stream)->start_time);
      printf("pre-buffer : %i ms\n", (*stream)->preroll);
      printf("duration   : %i ms\n", (*stream)->duration);
      printf("type specific data:\n");
      hexdump((*stream)->type_specific_data, (*stream)->type_specific_len);
      stream++;
    }
  }
  if(h->data)
  {
    printf("\nDATA:\n");
    printf("size      : %i\n", h->data->size);
    printf("packets   : %i\n", h->data->num_packets);
    printf("next DATA : 0x%08x\n", h->data->next_data_header);
  } 
}

void rmff_fix_header(rmff_header_t *h) {

  int num_headers=0;
  int header_size=0;
  rmff_mdpr_t **streams;
  int num_streams=0;

  if (!h) {
    mp_msg(MSGT_STREAM, MSGL_ERR, "rmff_fix_header: fatal: no header given.\n");
    return;
  }

  if (!h->streams) {
    mp_msg(MSGT_STREAM, MSGL_WARN, "rmff_fix_header: warning: no MDPR chunks\n");
  } else
  {
    streams=h->streams;
    while (*streams)
    {
      num_streams++;
      num_headers++;
      header_size+=(*streams)->size;
      streams++;
    }
  }
  
  if (h->prop) {
    if (h->prop->size != 50)
    {
#ifdef LOG
      printf("rmff_fix_header: correcting prop.size from %i to %i\n", h->prop->size, 50);
#endif
      h->prop->size=50;
    }
    if (h->prop->num_streams != num_streams)
    {
#ifdef LOG
      printf("rmff_fix_header: correcting prop.num_streams from %i to %i\n", h->prop->num_streams, num_streams);
#endif
      h->prop->num_streams=num_streams;
    }
    num_headers++;
    header_size+=50;
  } else
    mp_msg(MSGT_STREAM, MSGL_WARN, "rmff_fix_header: warning: no PROP chunk.\n");

  if (h->cont) {
    num_headers++;
    header_size+=h->cont->size;
  } else
    mp_msg(MSGT_STREAM, MSGL_WARN, "rmff_fix_header: warning: no CONT chunk.\n");

  if (!h->data) {
#ifdef LOG
    printf("rmff_fix_header: no DATA chunk, creating one\n");
#endif
    h->data=malloc(sizeof(rmff_data_t));
    h->data->object_id=DATA_TAG;
    h->data->object_version=0;
    h->data->size=34;
    h->data->num_packets=0;
    h->data->next_data_header=0;
  }
  num_headers++;

  
  if (!h->fileheader) {
#ifdef LOG
    printf("rmff_fix_header: no fileheader, creating one");
#endif
    h->fileheader=malloc(sizeof(rmff_fileheader_t));
    h->fileheader->object_id=RMF_TAG;
    h->fileheader->size=34;
    h->fileheader->object_version=0;
    h->fileheader->file_version=0;
    h->fileheader->num_headers=num_headers+1;
  }
  header_size+=h->fileheader->size;
  num_headers++;

  if(h->fileheader->num_headers != num_headers) {
#ifdef LOG
    printf("rmff_fix_header: setting num_headers from %i to %i\n", h->fileheader->num_headers, num_headers); 
#endif
    h->fileheader->num_headers=num_headers;
  }

  if(h->prop) {
    if (h->prop->data_offset != header_size) {
#ifdef LOG
      printf("rmff_fix_header: setting prop.data_offset from %i to %i\n", h->prop->data_offset, header_size); 
#endif
      h->prop->data_offset=header_size;
    }
    if (h->prop->num_packets == 0) {
      int p=(int)(h->prop->avg_bit_rate/8.0*(h->prop->duration/1000.0)/h->prop->avg_packet_size);
#ifdef LOG
      printf("rmff_fix_header: assuming prop.num_packets=%i\n", p); 
#endif
      h->prop->num_packets=p;
    }
    if (h->data->num_packets == 0) {
#ifdef LOG
      printf("rmff_fix_header: assuming data.num_packets=%i\n", h->prop->num_packets); 
#endif
      h->data->num_packets=h->prop->num_packets;
    }
    
#ifdef LOG
    printf("rmff_fix_header: assuming data.size=%i\n", h->prop->num_packets*h->prop->avg_packet_size); 
#endif
    h->data->size=h->prop->num_packets*h->prop->avg_packet_size;
  }
}

int rmff_get_header_size(rmff_header_t *h) {

  if (!h) return 0;
  if (!h->prop) return -1;

  return h->prop->data_offset+18;
  
}

void rmff_free_header(rmff_header_t *h) {

  if (!h) return;

  if (h->fileheader) free(h->fileheader);
  if (h->prop) free(h->prop);
  if (h->data) free(h->data);
  if (h->cont)
  {
    free(h->cont->title);
    free(h->cont->author);
    free(h->cont->copyright);
    free(h->cont->comment);
    free(h->cont);
  }
  if (h->streams)
  {
    rmff_mdpr_t **s=h->streams;

    while(*s) {
      free((*s)->stream_name);
      free((*s)->mime_type);
      free((*s)->type_specific_data);
      free(*s);
      s++;
    }
    free(h->streams);
  }
  free(h);
}