www.pudn.com > MyPlayerbylqh.rar > AudioDecoder.cpp

/************************************************************************************** 
 *                                                                                    * 
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 **************************************************************************************/ 
 
#include "AudioDecoder.h" 
 
 
 
MediaAudioDecoder::MediaAudioDecoder() 
{ 
	this->acmDecoder = new MediaAudioDecoderACM(); 
	this->mp3Decoder = new MediaAudioDecoderMP3(); 
 
	this->decoder    = NULL; 
} 
 
MediaAudioDecoder::~MediaAudioDecoder() 
{ 
	delete this->acmDecoder; 
	delete this->mp3Decoder; 
} 
 
 
media_type_t  MediaAudioDecoder::GetType() 
{ 
	return MEDIA_TYPE_AUDIO_DECODER; 
} 
 
char         *MediaAudioDecoder::GetName() 
{ 
	if(this->decoder) 
		return this->decoder->GetName(); 
 
	return "Audio Decoder Wrapper"; 
} 
	 
MP_RESULT     MediaAudioDecoder::Connect(MediaItem *item) 
{ 
 
	if(this->acmDecoder->Connect(item) == MP_RESULT_OK) { 
 
		this->decoder = (MediaItemAudioDecoder *) this->acmDecoder; 
		 
		return MP_RESULT_OK; 
	} 
 
	if(this->mp3Decoder->Connect(item) == MP_RESULT_OK) { 
 
		this->decoder = (MediaItemAudioDecoder *) this->mp3Decoder; 
		 
		return MP_RESULT_OK; 
	} 
 
	return MP_RESULT_ERROR; 
} 
 
MP_RESULT     MediaAudioDecoder::ReleaseConnections() 
{ 
	if(this->decoder) { 
 
		this->decoder->ReleaseConnections(); 
	} 
 
	this->decoder = NULL; 
	 
	return MP_RESULT_OK; 
} 
 
DWORD         MediaAudioDecoder::GetCaps() 
{ 
	return 0; 
} 
 
MP_RESULT     MediaAudioDecoder::Configure(HINSTANCE hInstance, HWND hwnd) 
{ 
	return MP_RESULT_ERROR; 
} 
 
 
 
WAVEFORMATEX *MediaAudioDecoder::GetAudioFormat() 
{ 
	if(this->decoder) 
		return this->decoder->GetAudioFormat(); 
 
	return NULL; 
} 
 
MP_RESULT     MediaAudioDecoder::EmptyAudioBuffer() 
{ 
	if(this->decoder) 
		return this->decoder->EmptyAudioBuffer(); 
 
	return MP_RESULT_ERROR; 
} 
 
unsigned int  MediaAudioDecoder::Decompress(void *buffer, unsigned int size) 
{ 
	if(this->decoder) 
		return this->decoder->Decompress(buffer, size); 
 
	return 0; 
}