[visualisation] Don't restrict the sample buffer to 256 samples

Allow visualisation to see all the audio samples. That is necessary to display more than 256 samples of waveform
or do longer ffts. Fixes an issus with discontinuity in shadertoy visualisation

xbmc/addons/Visualisation.cpp

@@ -262,7 +262,7 @@ void CVisualisation::OnAudioData(const float* pAudioData, int iAudioDataLength)
     return;
 
   // Save our audio data in the buffers
-  std::unique_ptr<CAudioBuffer> pBuffer ( new CAudioBuffer(AUDIO_BUFFER_SIZE) );
+  std::unique_ptr<CAudioBuffer> pBuffer ( new CAudioBuffer(iAudioDataLength) );
   pBuffer->Set(pAudioData, iAudioDataLength);
   m_vecBuffers.push_back( pBuffer.release() );
 
@@ -281,11 +281,11 @@ void CVisualisation::OnAudioData(const float* pAudioData, int iAudioDataLength)
     m_transform->calc(psAudioData, m_fFreq);
 
     // Transfer data to our visualisation
-    AudioData(psAudioData, AUDIO_BUFFER_SIZE, m_fFreq, AUDIO_BUFFER_SIZE/2); // half due to complex-conjugate
+    AudioData(psAudioData, iAudioDataLength, m_fFreq, AUDIO_BUFFER_SIZE/2); // half due to complex-conjugate
   }
   else
   { // Transfer data to our visualisation
-    AudioData(ptrAudioBuffer->Get(), AUDIO_BUFFER_SIZE, NULL, 0);
+    AudioData(ptrAudioBuffer->Get(), iAudioDataLength, NULL, 0);
   }
   return ;
 }

xbmc/cores/AudioEngine/Engines/ActiveAE/ActiveAE.cpp

@@ -2028,7 +2028,7 @@ bool CActiveAE::RunStages()
             {
               // copy the samples into the viz input buffer
               CSampleBuffer *viz = m_vizBuffersInput->GetFreeBuffer();
-              int samples = std::min(512, out->pkt->nb_samples);
+              int samples = out->pkt->nb_samples;
               int bytes = samples * out->pkt->config.channels / out->pkt->planes * out->pkt->bytes_per_sample;
               for(int i= 0; i < out->pkt->planes; i++)
               {
@@ -2051,8 +2051,7 @@ bool CActiveAE::RunStages()
                 break;
               else
               {
-                int samples;
-                samples = std::min(512, buf->pkt->nb_samples);
+                int samples = buf->pkt->nb_samples;
                 m_audioCallback->OnAudioData((float*)(buf->pkt->data[0]), samples);
                 buf->Return();
                 m_vizBuffers->m_outputSamples.pop_front();