channels/drdynvc/tsmf/tsmf_decoder.c

   1 /**
   2  * FreeRDP: A Remote Desktop Protocol client.
   3  * Video Redirection Virtual Channel - Decoder
   4  *
   5  * Copyright 2010-2011 Vic Lee
   6  *
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *     http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  */
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <freerdp/utils/memory.h>
  24 #include <freerdp/utils/load_plugin.h>
  25
  26 #include "drdynvc_types.h"
  27 #include "tsmf_types.h"
  28 #include "tsmf_constants.h"
  29 #include "tsmf_decoder.h"
  30
  31 static ITSMFDecoder* tsmf_load_decoder_by_name(const char* name, TS_AM_MEDIA_TYPE* media_type)
  32 {
  33         ITSMFDecoder* decoder;
  34         TSMF_DECODER_ENTRY entry;
  35         char* fullname;
  36
  37         if (strrchr(name, '.') != NULL)
  38                 entry = (TSMF_DECODER_ENTRY) freerdp_load_plugin(name, TSMF_DECODER_EXPORT_FUNC_NAME);
  39         else
  40         {
  41                 fullname = xzalloc(strlen(name) + 6);
  42                 strcpy(fullname, "tsmf_");
  43                 strcat(fullname, name);
  44                 entry = (TSMF_DECODER_ENTRY) freerdp_load_plugin(fullname, TSMF_DECODER_EXPORT_FUNC_NAME);
  45                 xfree(fullname);
  46         }
  47         if (entry == NULL)
  48         {
  49                 return NULL;
  50         }
  51
  52         decoder = entry();
  53         if (decoder == NULL)
  54         {
  55                 DEBUG_WARN("failed to call export function in %s", name);
  56                 return NULL;
  57         }
  58         if (!decoder->SetFormat(decoder, media_type))
  59         {
  60                 decoder->Free(decoder);
  61                 decoder = NULL;
  62         }
  63         return decoder;
  64 }
  65
  66 ITSMFDecoder* tsmf_load_decoder(const char* name, TS_AM_MEDIA_TYPE* media_type)
  67 {
  68         ITSMFDecoder* decoder;
  69
  70         if (name)
  71         {
  72                 decoder = tsmf_load_decoder_by_name(name, media_type);
  73         }
  74         else
  75         {
  76                 decoder = tsmf_load_decoder_by_name("ffmpeg", media_type);
  77         }
  78
  79         return decoder;
  80 }
  81