diff options
Diffstat (limited to 'orkbasecxx/filters/audiogain/AudioGain.cpp')
| -rw-r--r-- | orkbasecxx/filters/audiogain/AudioGain.cpp | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/orkbasecxx/filters/audiogain/AudioGain.cpp b/orkbasecxx/filters/audiogain/AudioGain.cpp new file mode 100644 index 0000000..59fec5d --- /dev/null +++ b/orkbasecxx/filters/audiogain/AudioGain.cpp @@ -0,0 +1,170 @@ +/*
+ * Oreka -- A media capture and retrieval platform
+ *
+ * Copyright (C) 2005, orecx LLC
+ *
+ * http://www.orecx.com
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License.
+ * Please refer to http://www.gnu.org/copyleft/gpl.html
+ *
+ */
+#pragma warning( disable: 4786 ) // disables truncated symbols in browse-info warning
+
+#define _WINSOCKAPI_ // prevents the inclusion of winsock.h
+
+#include "AudioGain.h"
+#include "ConfigManager.h"
+
+AudioGainFilter::AudioGainFilter()
+{
+ m_log = Logger::getLogger("audiogain");
+ m_numEncodingErrors = 0;
+ LOG4CXX_INFO(this->m_log, "Initialized AudioGain filter");
+}
+
+AudioGainFilter::~AudioGainFilter()
+{
+ if(m_numEncodingErrors > 0)
+ {
+ CStdString logMsg;
+ logMsg.Format("Encoding error happened %d time(s)", m_numEncodingErrors);
+ LOG4CXX_WARN(m_log, logMsg);
+ }
+ LOG4CXX_INFO(this->m_log, "Decommissioned AudioGain filter");
+}
+
+FilterRef AudioGainFilter::Instanciate()
+{
+ FilterRef Filter(new AudioGainFilter());
+ return Filter;
+}
+
+void AudioGainFilter::AudioChunkIn(AudioChunkRef& inputAudioChunk)
+{
+ int r_samples = 0;
+ int i = 0;
+ AudioChunkDetails outputDetails;
+
+ m_outputAudioChunk.reset();
+ if(inputAudioChunk.get() == NULL) {
+ return;
+ }
+
+ if(inputAudioChunk->GetNumSamples() == 0) {
+ return;
+ }
+
+ outputDetails = *inputAudioChunk->GetDetails();
+ r_samples = inputAudioChunk->GetNumSamples();
+ m_outputAudioChunk.reset(new AudioChunk());
+
+ if(inputAudioChunk->GetEncoding() != PcmAudio)
+ {
+ if(m_numEncodingErrors == 0)
+ {
+ CStdString logMsg;
+
+ logMsg.Format("Unexpected encoding:%d expected:%d (PcmAudio), gain not applied", inputAudioChunk->GetEncoding(), PcmAudio);
+ LOG4CXX_WARN(m_log, logMsg);
+ }
+ m_numEncodingErrors++;
+ m_outputAudioChunk->SetBuffer(inputAudioChunk->m_pBuffer, outputDetails);
+ return;
+ }
+
+ short* outputBuffer = (short*)m_outputAudioChunk->CreateBuffer(outputDetails);
+ short* inputBuffer = (short*)inputAudioChunk->m_pBuffer;
+ int sample = 0;
+
+ for(i = 0; i < r_samples; i++) {
+ sample = inputBuffer[i];
+ if(CONFIG.m_audioGain != 0)
+ {
+ if(CONFIG.m_audioGain < 0)
+ {
+ sample = (int)((double)sample / sqrt(fabs(CONFIG.m_audioGain)));
+ }
+ else
+ {
+ sample = (int)((double)sample * sqrt(fabs(CONFIG.m_audioGain)));
+ }
+ }
+ if(CONFIG.m_audioGainChannel1 != 0)
+ {
+ if(outputDetails.m_channel == 1)
+ {
+ if(CONFIG.m_audioGainChannel1 < 0)
+ {
+ sample = (int)((double)sample / sqrt(fabs(CONFIG.m_audioGainChannel1)));
+ }
+ else
+ {
+ sample = (int)((double)sample * sqrt(fabs(CONFIG.m_audioGainChannel1)));
+ }
+ }
+ }
+ if(CONFIG.m_audioGainChannel2 != 0)
+ {
+ if(outputDetails.m_channel == 2)
+ {
+ if(CONFIG.m_audioGainChannel2 < 0)
+ {
+ sample = (int)((double)sample / sqrt(fabs(CONFIG.m_audioGainChannel2)));
+ }
+ else
+ {
+ sample = (int)((double)sample / sqrt(fabs(CONFIG.m_audioGainChannel2)));
+ }
+ }
+ }
+
+ if(sample < -32768)
+ {
+ sample = -32768;
+ }
+ if(sample > 32768)
+ {
+ sample = 32768;
+ }
+
+ outputBuffer[i] = sample;
+ }
+}
+
+void AudioGainFilter::AudioChunkOut(AudioChunkRef& chunk)
+{
+ chunk = m_outputAudioChunk;
+}
+
+AudioEncodingEnum AudioGainFilter::GetInputAudioEncoding()
+{
+ return PcmAudio;
+}
+
+AudioEncodingEnum AudioGainFilter::GetOutputAudioEncoding()
+{
+ return PcmAudio;
+}
+
+CStdString AudioGainFilter::GetName()
+{
+ return "AudioGain";
+}
+
+int AudioGainFilter::GetInputRtpPayloadType()
+{
+ return -1;
+}
+
+void AudioGainFilter::CaptureEventIn(CaptureEventRef& event)
+{
+ ;
+}
+
+void AudioGainFilter::CaptureEventOut(CaptureEventRef& event)
+{
+ ;
+}
+
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