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-rw-r--r--arm-wt-22k/lib_src/eas_mixer.c904
1 files changed, 452 insertions, 452 deletions
diff --git a/arm-wt-22k/lib_src/eas_mixer.c b/arm-wt-22k/lib_src/eas_mixer.c
index c4a2f9f..0a839a8 100644
--- a/arm-wt-22k/lib_src/eas_mixer.c
+++ b/arm-wt-22k/lib_src/eas_mixer.c
@@ -1,13 +1,13 @@
-/*----------------------------------------------------------------------------
- *
- * File:
- * eas_mixer.c
- *
- * Contents and purpose:
- * This file contains the critical components of the mix engine that
- * must be optimized for best performance.
- *
- * Copyright Sonic Network Inc. 2005
+/*----------------------------------------------------------------------------
+ *
+ * File:
+ * eas_mixer.c
+ *
+ * Contents and purpose:
+ * This file contains the critical components of the mix engine that
+ * must be optimized for best performance.
+ *
+ * Copyright Sonic Network Inc. 2005
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -20,445 +20,445 @@
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
- *
- *----------------------------------------------------------------------------
- * Revision Control:
- * $Revision: 706 $
- * $Date: 2007-05-31 17:22:51 -0700 (Thu, 31 May 2007) $
- *----------------------------------------------------------------------------
-*/
-
-//3 dls: This module is in the midst of being converted from a synth
-//3 specific module to a general purpose mix engine
-
-/*------------------------------------
- * includes
- *------------------------------------
-*/
-#include "eas_data.h"
-#include "eas_host.h"
-#include "eas_math.h"
-#include "eas_mixer.h"
-#include "eas_config.h"
-#include "eas_report.h"
-
-#ifdef _MAXIMIZER_ENABLED
-EAS_I32 MaximizerProcess (EAS_VOID_PTR pInstData, EAS_I32 *pSrc, EAS_I32 *pDst, EAS_I32 numSamples);
-#endif
-
-/*------------------------------------
- * defines
- *------------------------------------
-*/
-
-/* need to boost stereo by ~3dB to compensate for the panner */
-#define STEREO_3DB_GAIN_BOOST 512
-
-/*----------------------------------------------------------------------------
- * EAS_MixEngineInit()
- *----------------------------------------------------------------------------
- * Purpose:
- * Prepares the mix engine for work, allocates buffers, locates effects modules, etc.
- *
- * Inputs:
- * pEASData - instance data
- * pInstData - pointer to variable to receive instance data handle
- *
- * Outputs:
- *
- * Side Effects:
- *
- *----------------------------------------------------------------------------
-*/
-EAS_RESULT EAS_MixEngineInit (S_EAS_DATA *pEASData)
-{
-
- /* check Configuration Module for mix buffer allocation */
- if (pEASData->staticMemoryModel)
- pEASData->pMixBuffer = EAS_CMEnumData(EAS_CM_MIX_BUFFER);
- else
- pEASData->pMixBuffer = EAS_HWMalloc(pEASData->hwInstData, BUFFER_SIZE_IN_MONO_SAMPLES * NUM_OUTPUT_CHANNELS * sizeof(EAS_I32));
- if (pEASData->pMixBuffer == NULL)
- {
- { /* dpp: EAS_ReportEx(_EAS_SEVERITY_FATAL, "Failed to allocate mix buffer memory\n"); */ }
- return EAS_ERROR_MALLOC_FAILED;
- }
- EAS_HWMemSet((void *)(pEASData->pMixBuffer), 0, BUFFER_SIZE_IN_MONO_SAMPLES * NUM_OUTPUT_CHANNELS * sizeof(EAS_I32));
-
- return EAS_SUCCESS;
-}
-
-/*----------------------------------------------------------------------------
- * EAS_MixEnginePrep()
- *----------------------------------------------------------------------------
- * Purpose:
- * Performs prep before synthesize a buffer of audio, such as clearing
- * audio buffers, etc.
- *
- * Inputs:
- * psEASData - pointer to overall EAS data structure
- *
- * Outputs:
- *
- * Side Effects:
- *
- *----------------------------------------------------------------------------
-*/
-void EAS_MixEnginePrep (S_EAS_DATA *pEASData, EAS_I32 numSamples)
-{
-
- /* clear the mix buffer */
-#if (NUM_OUTPUT_CHANNELS == 2)
- EAS_HWMemSet(pEASData->pMixBuffer, 0, numSamples * (EAS_I32) sizeof(long) * 2);
-#else
- EAS_HWMemSet(pEASData->pMixBuffer, 0, (EAS_I32) numSamples * (EAS_I32) sizeof(long));
-#endif
-
- /* need to clear other side-chain effect buffers (chorus & reverb) */
-}
-
-/*----------------------------------------------------------------------------
- * EAS_MixEnginePost
- *----------------------------------------------------------------------------
- * Purpose:
- * This routine does the post-processing after all voices have been
- * synthesized. It calls any sweeteners and does the final mixdown to
- * the output buffer.
- *
- * Inputs:
- *
- * Outputs:
- *
- * Notes:
- *----------------------------------------------------------------------------
-*/
-void EAS_MixEnginePost (S_EAS_DATA *pEASData, EAS_I32 numSamples)
-{
- EAS_U16 gain;
-
-//3 dls: Need to restore the mix engine metrics
-
- /* calculate the gain multiplier */
-#ifdef _MAXIMIZER_ENABLED
- if (pEASData->effectsModules[EAS_MODULE_MAXIMIZER].effect)
- {
- EAS_I32 temp;
- temp = MaximizerProcess(pEASData->effectsModules[EAS_MODULE_MAXIMIZER].effectData, pEASData->pMixBuffer, pEASData->pMixBuffer, numSamples);
- temp = (temp * pEASData->masterGain) >> 15;
- if (temp > 32767)
- gain = 32767;
- else
- gain = (EAS_U16) temp;
- }
- else
- gain = (EAS_U16) pEASData->masterGain;
-#else
- gain = (EAS_U16) pEASData->masterGain;
-#endif
-
- /* Not using all the gain bits for now
- * Reduce the input to the compressor by 6dB to prevent saturation
- */
-#ifdef _COMPRESSOR_ENABLED
- if (pEASData->effectsModules[EAS_MODULE_COMPRESSOR].effectData)
- gain = gain >> 5;
- else
- gain = gain >> 4;
-#else
- gain = gain >> 4;
-#endif
-
- /* convert 32-bit mix buffer to 16-bit output format */
-#if (NUM_OUTPUT_CHANNELS == 2)
- SynthMasterGain(pEASData->pMixBuffer, pEASData->pOutputAudioBuffer, gain, (EAS_U16) ((EAS_U16) numSamples * 2));
-#else
- SynthMasterGain(pEASData->pMixBuffer, pEASData->pOutputAudioBuffer, gain, (EAS_U16) numSamples);
-#endif
-
-#ifdef _ENHANCER_ENABLED
- /* enhancer effect */
- if (pEASData->effectsModules[EAS_MODULE_ENHANCER].effectData)
- (*pEASData->effectsModules[EAS_MODULE_ENHANCER].effect->pfProcess)
- (pEASData->effectsModules[EAS_MODULE_ENHANCER].effectData,
- pEASData->pOutputAudioBuffer,
- pEASData->pOutputAudioBuffer,
- numSamples);
-#endif
-
-#ifdef _GRAPHIC_EQ_ENABLED
- /* graphic EQ effect */
- if (pEASData->effectsModules[EAS_MODULE_GRAPHIC_EQ].effectData)
- (*pEASData->effectsModules[EAS_MODULE_GRAPHIC_EQ].effect->pfProcess)
- (pEASData->effectsModules[EAS_MODULE_GRAPHIC_EQ].effectData,
- pEASData->pOutputAudioBuffer,
- pEASData->pOutputAudioBuffer,
- numSamples);
-#endif
-
-#ifdef _COMPRESSOR_ENABLED
- /* compressor effect */
- if (pEASData->effectsModules[EAS_MODULE_COMPRESSOR].effectData)
- (*pEASData->effectsModules[EAS_MODULE_COMPRESSOR].effect->pfProcess)
- (pEASData->effectsModules[EAS_MODULE_COMPRESSOR].effectData,
- pEASData->pOutputAudioBuffer,
- pEASData->pOutputAudioBuffer,
- numSamples);
-#endif
-
-#ifdef _WOW_ENABLED
- /* WOW requires a 32-bit buffer, borrow the mix buffer and
- * pass it as the destination buffer
- */
- /*lint -e{740} temporarily passing a parameter through an existing I/F */
- if (pEASData->effectsModules[EAS_MODULE_WOW].effectData)
- (*pEASData->effectsModules[EAS_MODULE_WOW].effect->pfProcess)
- (pEASData->effectsModules[EAS_MODULE_WOW].effectData,
- pEASData->pOutputAudioBuffer,
- (EAS_PCM*) pEASData->pMixBuffer,
- numSamples);
-#endif
-
-#ifdef _TONECONTROLEQ_ENABLED
- /* ToneControlEQ effect */
- if (pEASData->effectsModules[EAS_MODULE_TONECONTROLEQ].effectData)
- (*pEASData->effectsModules[EAS_MODULE_TONECONTROLEQ].effect->pfProcess)
- (pEASData->effectsModules[EAS_MODULE_TONECONTROLEQ].effectData,
- pEASData->pOutputAudioBuffer,
- pEASData->pOutputAudioBuffer,
- numSamples);
-#endif
-
-#ifdef _REVERB_ENABLED
- /* Reverb effect */
- if (pEASData->effectsModules[EAS_MODULE_REVERB].effectData)
- (*pEASData->effectsModules[EAS_MODULE_REVERB].effect->pfProcess)
- (pEASData->effectsModules[EAS_MODULE_REVERB].effectData,
- pEASData->pOutputAudioBuffer,
- pEASData->pOutputAudioBuffer,
- numSamples);
-#endif
-
-#ifdef _CHORUS_ENABLED
- /* Chorus effect */
- if (pEASData->effectsModules[EAS_MODULE_CHORUS].effectData)
- (*pEASData->effectsModules[EAS_MODULE_CHORUS].effect->pfProcess)
- (pEASData->effectsModules[EAS_MODULE_CHORUS].effectData,
- pEASData->pOutputAudioBuffer,
- pEASData->pOutputAudioBuffer,
- numSamples);
-#endif
-
-}
-
-#ifndef NATIVE_EAS_KERNEL
-/*----------------------------------------------------------------------------
- * SynthMasterGain
- *----------------------------------------------------------------------------
- * Purpose:
- * Mixes down audio from 32-bit to 16-bit target buffer
- *
- * Inputs:
- *
- * Outputs:
- *
- *----------------------------------------------------------------------------
-*/
-void SynthMasterGain (long *pInputBuffer, EAS_PCM *pOutputBuffer, EAS_U16 nGain, EAS_U16 numSamples) {
-
- /* loop through the buffer */
- while (numSamples--) {
- long s;
-
- /* read a sample from the input buffer and add some guard bits */
- s = *pInputBuffer++;
-
- /* add some guard bits */
- /*lint -e{704} <avoid divide for performance>*/
- s = s >> 7;
-
- /* apply master gain */
- s *= (long) nGain;
-
- /* shift to lower 16-bits */
- /*lint -e{704} <avoid divide for performance>*/
- s = s >> 9;
-
- /* saturate */
- s = SATURATE(s);
-
- *pOutputBuffer++ = (EAS_PCM)s;
- }
-}
-#endif
-
-/*----------------------------------------------------------------------------
- * EAS_MixEngineShutdown()
- *----------------------------------------------------------------------------
- * Purpose:
- * Shuts down effects modules and deallocates memory
- *
- * Inputs:
- * pEASData - instance data
- * pInstData - instance data handle
- *
- * Outputs:
- *
- * Side Effects:
- *
- *----------------------------------------------------------------------------
-*/
-EAS_RESULT EAS_MixEngineShutdown (S_EAS_DATA *pEASData)
-{
-
- /* check Configuration Module for static memory allocation */
- if (!pEASData->staticMemoryModel && (pEASData->pMixBuffer != NULL))
- EAS_HWFree(pEASData->hwInstData, pEASData->pMixBuffer);
-
- return EAS_SUCCESS;
-}
-
-#ifdef UNIFIED_MIXER
-#ifndef NATIVE_MIX_STREAM
-/*----------------------------------------------------------------------------
- * EAS_MixStream
- *----------------------------------------------------------------------------
- * Mix a 16-bit stream into a 32-bit buffer
- *
- * pInputBuffer 16-bit input buffer
- * pMixBuffer 32-bit mix buffer
- * numSamples number of samples to mix
- * gainLeft initial gain left or mono
- * gainRight initial gain right
- * gainLeft left gain increment per sample
- * gainRight right gain increment per sample
- * flags bit 0 = stereo source
- * bit 1 = stereo output
- *----------------------------------------------------------------------------
-*/
-void EAS_MixStream (EAS_PCM *pInputBuffer, EAS_I32 *pMixBuffer, EAS_I32 numSamples, EAS_I32 gainLeft, EAS_I32 gainRight, EAS_I32 gainIncLeft, EAS_I32 gainIncRight, EAS_I32 flags)
-{
- EAS_I32 temp;
- EAS_INT src, dest;
-
- /* NOTE: There are a lot of optimizations that can be done
- * in the native implementations based on register
- * availability, etc. For example, it may make sense to
- * break this down into 8 separate routines:
- *
- * 1. Mono source to mono output
- * 2. Mono source to stereo output
- * 3. Stereo source to mono output
- * 4. Stereo source to stereo output
- * 5. Mono source to mono output - no gain change
- * 6. Mono source to stereo output - no gain change
- * 7. Stereo source to mono output - no gain change
- * 8. Stereo source to stereo output - no gain change
- *
- * Other possibilities include loop unrolling, skipping
- * a gain calculation every 2 or 4 samples, etc.
- */
-
- /* no gain change, use fast loops */
- if ((gainIncLeft == 0) && (gainIncRight == 0))
- {
- switch (flags & (MIX_FLAGS_STEREO_SOURCE | MIX_FLAGS_STEREO_OUTPUT))
- {
- /* mono to mono */
- case 0:
- gainLeft >>= 15;
- for (src = dest = 0; src < numSamples; src++, dest++)
- {
-
- pMixBuffer[dest] += (pInputBuffer[src] * gainLeft) >> NUM_MIXER_GUARD_BITS;
- }
- break;
-
- /* mono to stereo */
- case MIX_FLAGS_STEREO_OUTPUT:
- gainLeft >>= 15;
- gainRight >>= 15;
- for (src = dest = 0; src < numSamples; src++, dest+=2)
- {
- pMixBuffer[dest] += (pInputBuffer[src] * gainLeft) >> NUM_MIXER_GUARD_BITS;
- pMixBuffer[dest+1] += (pInputBuffer[src] * gainRight) >> NUM_MIXER_GUARD_BITS;
- }
- break;
-
- /* stereo to mono */
- case MIX_FLAGS_STEREO_SOURCE:
- gainLeft >>= 15;
- gainRight >>= 15;
- for (src = dest = 0; src < numSamples; src+=2, dest++)
- {
- temp = (pInputBuffer[src] * gainLeft) >> NUM_MIXER_GUARD_BITS;
- temp += ((pInputBuffer[src+1] * gainRight) >> NUM_MIXER_GUARD_BITS);
- pMixBuffer[dest] += temp;
- }
- break;
-
- /* stereo to stereo */
- case MIX_FLAGS_STEREO_SOURCE | MIX_FLAGS_STEREO_OUTPUT:
- gainLeft >>= 15;
- gainRight >>= 15;
- for (src = dest = 0; src < numSamples; src+=2, dest+=2)
- {
- pMixBuffer[dest] += (pInputBuffer[src] * gainLeft) >> NUM_MIXER_GUARD_BITS;
- pMixBuffer[dest+1] += (pInputBuffer[src+1] * gainRight) >> NUM_MIXER_GUARD_BITS;
- }
- break;
- }
- }
-
- /* gain change - do gain increment */
- else
- {
- switch (flags & (MIX_FLAGS_STEREO_SOURCE | MIX_FLAGS_STEREO_OUTPUT))
- {
- /* mono to mono */
- case 0:
- for (src = dest = 0; src < numSamples; src++, dest++)
- {
- gainLeft += gainIncLeft;
- pMixBuffer[dest] += (pInputBuffer[src] * (gainLeft >> 15)) >> NUM_MIXER_GUARD_BITS;
- }
- break;
-
- /* mono to stereo */
- case MIX_FLAGS_STEREO_OUTPUT:
- for (src = dest = 0; src < numSamples; src++, dest+=2)
- {
- gainLeft += gainIncLeft;
- gainRight += gainIncRight;
- pMixBuffer[dest] += (pInputBuffer[src] * (gainLeft >> 15)) >> NUM_MIXER_GUARD_BITS;
- pMixBuffer[dest+1] += (pInputBuffer[src] * (gainRight >> 15)) >> NUM_MIXER_GUARD_BITS;
- }
- break;
-
- /* stereo to mono */
- case MIX_FLAGS_STEREO_SOURCE:
- for (src = dest = 0; src < numSamples; src+=2, dest++)
- {
- gainLeft += gainIncLeft;
- gainRight += gainIncRight;
- temp = (pInputBuffer[src] * (gainLeft >> 15)) >> NUM_MIXER_GUARD_BITS;
- temp += ((pInputBuffer[src+1] * (gainRight >> 15)) >> NUM_MIXER_GUARD_BITS);
- pMixBuffer[dest] += temp;
- }
- break;
-
- /* stereo to stereo */
- case MIX_FLAGS_STEREO_SOURCE | MIX_FLAGS_STEREO_OUTPUT:
- for (src = dest = 0; src < numSamples; src+=2, dest+=2)
- {
- gainLeft += gainIncLeft;
- gainRight += gainIncRight;
- pMixBuffer[dest] += (pInputBuffer[src] * (gainLeft >> 15)) >> NUM_MIXER_GUARD_BITS;
- pMixBuffer[dest+1] += (pInputBuffer[src+1] * (gainRight >> 15)) >> NUM_MIXER_GUARD_BITS;
- }
- break;
- }
- }
-}
-#endif
-#endif
-
+ *
+ *----------------------------------------------------------------------------
+ * Revision Control:
+ * $Revision: 706 $
+ * $Date: 2007-05-31 17:22:51 -0700 (Thu, 31 May 2007) $
+ *----------------------------------------------------------------------------
+*/
+
+//3 dls: This module is in the midst of being converted from a synth
+//3 specific module to a general purpose mix engine
+
+/*------------------------------------
+ * includes
+ *------------------------------------
+*/
+#include "eas_data.h"
+#include "eas_host.h"
+#include "eas_math.h"
+#include "eas_mixer.h"
+#include "eas_config.h"
+#include "eas_report.h"
+
+#ifdef _MAXIMIZER_ENABLED
+EAS_I32 MaximizerProcess (EAS_VOID_PTR pInstData, EAS_I32 *pSrc, EAS_I32 *pDst, EAS_I32 numSamples);
+#endif
+
+/*------------------------------------
+ * defines
+ *------------------------------------
+*/
+
+/* need to boost stereo by ~3dB to compensate for the panner */
+#define STEREO_3DB_GAIN_BOOST 512
+
+/*----------------------------------------------------------------------------
+ * EAS_MixEngineInit()
+ *----------------------------------------------------------------------------
+ * Purpose:
+ * Prepares the mix engine for work, allocates buffers, locates effects modules, etc.
+ *
+ * Inputs:
+ * pEASData - instance data
+ * pInstData - pointer to variable to receive instance data handle
+ *
+ * Outputs:
+ *
+ * Side Effects:
+ *
+ *----------------------------------------------------------------------------
+*/
+EAS_RESULT EAS_MixEngineInit (S_EAS_DATA *pEASData)
+{
+
+ /* check Configuration Module for mix buffer allocation */
+ if (pEASData->staticMemoryModel)
+ pEASData->pMixBuffer = EAS_CMEnumData(EAS_CM_MIX_BUFFER);
+ else
+ pEASData->pMixBuffer = EAS_HWMalloc(pEASData->hwInstData, BUFFER_SIZE_IN_MONO_SAMPLES * NUM_OUTPUT_CHANNELS * sizeof(EAS_I32));
+ if (pEASData->pMixBuffer == NULL)
+ {
+ { /* dpp: EAS_ReportEx(_EAS_SEVERITY_FATAL, "Failed to allocate mix buffer memory\n"); */ }
+ return EAS_ERROR_MALLOC_FAILED;
+ }
+ EAS_HWMemSet((void *)(pEASData->pMixBuffer), 0, BUFFER_SIZE_IN_MONO_SAMPLES * NUM_OUTPUT_CHANNELS * sizeof(EAS_I32));
+
+ return EAS_SUCCESS;
+}
+
+/*----------------------------------------------------------------------------
+ * EAS_MixEnginePrep()
+ *----------------------------------------------------------------------------
+ * Purpose:
+ * Performs prep before synthesize a buffer of audio, such as clearing
+ * audio buffers, etc.
+ *
+ * Inputs:
+ * psEASData - pointer to overall EAS data structure
+ *
+ * Outputs:
+ *
+ * Side Effects:
+ *
+ *----------------------------------------------------------------------------
+*/
+void EAS_MixEnginePrep (S_EAS_DATA *pEASData, EAS_I32 numSamples)
+{
+
+ /* clear the mix buffer */
+#if (NUM_OUTPUT_CHANNELS == 2)
+ EAS_HWMemSet(pEASData->pMixBuffer, 0, numSamples * (EAS_I32) sizeof(long) * 2);
+#else
+ EAS_HWMemSet(pEASData->pMixBuffer, 0, (EAS_I32) numSamples * (EAS_I32) sizeof(long));
+#endif
+
+ /* need to clear other side-chain effect buffers (chorus & reverb) */
+}
+
+/*----------------------------------------------------------------------------
+ * EAS_MixEnginePost
+ *----------------------------------------------------------------------------
+ * Purpose:
+ * This routine does the post-processing after all voices have been
+ * synthesized. It calls any sweeteners and does the final mixdown to
+ * the output buffer.
+ *
+ * Inputs:
+ *
+ * Outputs:
+ *
+ * Notes:
+ *----------------------------------------------------------------------------
+*/
+void EAS_MixEnginePost (S_EAS_DATA *pEASData, EAS_I32 numSamples)
+{
+ EAS_U16 gain;
+
+//3 dls: Need to restore the mix engine metrics
+
+ /* calculate the gain multiplier */
+#ifdef _MAXIMIZER_ENABLED
+ if (pEASData->effectsModules[EAS_MODULE_MAXIMIZER].effect)
+ {
+ EAS_I32 temp;
+ temp = MaximizerProcess(pEASData->effectsModules[EAS_MODULE_MAXIMIZER].effectData, pEASData->pMixBuffer, pEASData->pMixBuffer, numSamples);
+ temp = (temp * pEASData->masterGain) >> 15;
+ if (temp > 32767)
+ gain = 32767;
+ else
+ gain = (EAS_U16) temp;
+ }
+ else
+ gain = (EAS_U16) pEASData->masterGain;
+#else
+ gain = (EAS_U16) pEASData->masterGain;
+#endif
+
+ /* Not using all the gain bits for now
+ * Reduce the input to the compressor by 6dB to prevent saturation
+ */
+#ifdef _COMPRESSOR_ENABLED
+ if (pEASData->effectsModules[EAS_MODULE_COMPRESSOR].effectData)
+ gain = gain >> 5;
+ else
+ gain = gain >> 4;
+#else
+ gain = gain >> 4;
+#endif
+
+ /* convert 32-bit mix buffer to 16-bit output format */
+#if (NUM_OUTPUT_CHANNELS == 2)
+ SynthMasterGain(pEASData->pMixBuffer, pEASData->pOutputAudioBuffer, gain, (EAS_U16) ((EAS_U16) numSamples * 2));
+#else
+ SynthMasterGain(pEASData->pMixBuffer, pEASData->pOutputAudioBuffer, gain, (EAS_U16) numSamples);
+#endif
+
+#ifdef _ENHANCER_ENABLED
+ /* enhancer effect */
+ if (pEASData->effectsModules[EAS_MODULE_ENHANCER].effectData)
+ (*pEASData->effectsModules[EAS_MODULE_ENHANCER].effect->pfProcess)
+ (pEASData->effectsModules[EAS_MODULE_ENHANCER].effectData,
+ pEASData->pOutputAudioBuffer,
+ pEASData->pOutputAudioBuffer,
+ numSamples);
+#endif
+
+#ifdef _GRAPHIC_EQ_ENABLED
+ /* graphic EQ effect */
+ if (pEASData->effectsModules[EAS_MODULE_GRAPHIC_EQ].effectData)
+ (*pEASData->effectsModules[EAS_MODULE_GRAPHIC_EQ].effect->pfProcess)
+ (pEASData->effectsModules[EAS_MODULE_GRAPHIC_EQ].effectData,
+ pEASData->pOutputAudioBuffer,
+ pEASData->pOutputAudioBuffer,
+ numSamples);
+#endif
+
+#ifdef _COMPRESSOR_ENABLED
+ /* compressor effect */
+ if (pEASData->effectsModules[EAS_MODULE_COMPRESSOR].effectData)
+ (*pEASData->effectsModules[EAS_MODULE_COMPRESSOR].effect->pfProcess)
+ (pEASData->effectsModules[EAS_MODULE_COMPRESSOR].effectData,
+ pEASData->pOutputAudioBuffer,
+ pEASData->pOutputAudioBuffer,
+ numSamples);
+#endif
+
+#ifdef _WOW_ENABLED
+ /* WOW requires a 32-bit buffer, borrow the mix buffer and
+ * pass it as the destination buffer
+ */
+ /*lint -e{740} temporarily passing a parameter through an existing I/F */
+ if (pEASData->effectsModules[EAS_MODULE_WOW].effectData)
+ (*pEASData->effectsModules[EAS_MODULE_WOW].effect->pfProcess)
+ (pEASData->effectsModules[EAS_MODULE_WOW].effectData,
+ pEASData->pOutputAudioBuffer,
+ (EAS_PCM*) pEASData->pMixBuffer,
+ numSamples);
+#endif
+
+#ifdef _TONECONTROLEQ_ENABLED
+ /* ToneControlEQ effect */
+ if (pEASData->effectsModules[EAS_MODULE_TONECONTROLEQ].effectData)
+ (*pEASData->effectsModules[EAS_MODULE_TONECONTROLEQ].effect->pfProcess)
+ (pEASData->effectsModules[EAS_MODULE_TONECONTROLEQ].effectData,
+ pEASData->pOutputAudioBuffer,
+ pEASData->pOutputAudioBuffer,
+ numSamples);
+#endif
+
+#ifdef _REVERB_ENABLED
+ /* Reverb effect */
+ if (pEASData->effectsModules[EAS_MODULE_REVERB].effectData)
+ (*pEASData->effectsModules[EAS_MODULE_REVERB].effect->pfProcess)
+ (pEASData->effectsModules[EAS_MODULE_REVERB].effectData,
+ pEASData->pOutputAudioBuffer,
+ pEASData->pOutputAudioBuffer,
+ numSamples);
+#endif
+
+#ifdef _CHORUS_ENABLED
+ /* Chorus effect */
+ if (pEASData->effectsModules[EAS_MODULE_CHORUS].effectData)
+ (*pEASData->effectsModules[EAS_MODULE_CHORUS].effect->pfProcess)
+ (pEASData->effectsModules[EAS_MODULE_CHORUS].effectData,
+ pEASData->pOutputAudioBuffer,
+ pEASData->pOutputAudioBuffer,
+ numSamples);
+#endif
+
+}
+
+#ifndef NATIVE_EAS_KERNEL
+/*----------------------------------------------------------------------------
+ * SynthMasterGain
+ *----------------------------------------------------------------------------
+ * Purpose:
+ * Mixes down audio from 32-bit to 16-bit target buffer
+ *
+ * Inputs:
+ *
+ * Outputs:
+ *
+ *----------------------------------------------------------------------------
+*/
+void SynthMasterGain (long *pInputBuffer, EAS_PCM *pOutputBuffer, EAS_U16 nGain, EAS_U16 numSamples) {
+
+ /* loop through the buffer */
+ while (numSamples--) {
+ long s;
+
+ /* read a sample from the input buffer and add some guard bits */
+ s = *pInputBuffer++;
+
+ /* add some guard bits */
+ /*lint -e{704} <avoid divide for performance>*/
+ s = s >> 7;
+
+ /* apply master gain */
+ s *= (long) nGain;
+
+ /* shift to lower 16-bits */
+ /*lint -e{704} <avoid divide for performance>*/
+ s = s >> 9;
+
+ /* saturate */
+ s = SATURATE(s);
+
+ *pOutputBuffer++ = (EAS_PCM)s;
+ }
+}
+#endif
+
+/*----------------------------------------------------------------------------
+ * EAS_MixEngineShutdown()
+ *----------------------------------------------------------------------------
+ * Purpose:
+ * Shuts down effects modules and deallocates memory
+ *
+ * Inputs:
+ * pEASData - instance data
+ * pInstData - instance data handle
+ *
+ * Outputs:
+ *
+ * Side Effects:
+ *
+ *----------------------------------------------------------------------------
+*/
+EAS_RESULT EAS_MixEngineShutdown (S_EAS_DATA *pEASData)
+{
+
+ /* check Configuration Module for static memory allocation */
+ if (!pEASData->staticMemoryModel && (pEASData->pMixBuffer != NULL))
+ EAS_HWFree(pEASData->hwInstData, pEASData->pMixBuffer);
+
+ return EAS_SUCCESS;
+}
+
+#ifdef UNIFIED_MIXER
+#ifndef NATIVE_MIX_STREAM
+/*----------------------------------------------------------------------------
+ * EAS_MixStream
+ *----------------------------------------------------------------------------
+ * Mix a 16-bit stream into a 32-bit buffer
+ *
+ * pInputBuffer 16-bit input buffer
+ * pMixBuffer 32-bit mix buffer
+ * numSamples number of samples to mix
+ * gainLeft initial gain left or mono
+ * gainRight initial gain right
+ * gainLeft left gain increment per sample
+ * gainRight right gain increment per sample
+ * flags bit 0 = stereo source
+ * bit 1 = stereo output
+ *----------------------------------------------------------------------------
+*/
+void EAS_MixStream (EAS_PCM *pInputBuffer, EAS_I32 *pMixBuffer, EAS_I32 numSamples, EAS_I32 gainLeft, EAS_I32 gainRight, EAS_I32 gainIncLeft, EAS_I32 gainIncRight, EAS_I32 flags)
+{
+ EAS_I32 temp;
+ EAS_INT src, dest;
+
+ /* NOTE: There are a lot of optimizations that can be done
+ * in the native implementations based on register
+ * availability, etc. For example, it may make sense to
+ * break this down into 8 separate routines:
+ *
+ * 1. Mono source to mono output
+ * 2. Mono source to stereo output
+ * 3. Stereo source to mono output
+ * 4. Stereo source to stereo output
+ * 5. Mono source to mono output - no gain change
+ * 6. Mono source to stereo output - no gain change
+ * 7. Stereo source to mono output - no gain change
+ * 8. Stereo source to stereo output - no gain change
+ *
+ * Other possibilities include loop unrolling, skipping
+ * a gain calculation every 2 or 4 samples, etc.
+ */
+
+ /* no gain change, use fast loops */
+ if ((gainIncLeft == 0) && (gainIncRight == 0))
+ {
+ switch (flags & (MIX_FLAGS_STEREO_SOURCE | MIX_FLAGS_STEREO_OUTPUT))
+ {
+ /* mono to mono */
+ case 0:
+ gainLeft >>= 15;
+ for (src = dest = 0; src < numSamples; src++, dest++)
+ {
+
+ pMixBuffer[dest] += (pInputBuffer[src] * gainLeft) >> NUM_MIXER_GUARD_BITS;
+ }
+ break;
+
+ /* mono to stereo */
+ case MIX_FLAGS_STEREO_OUTPUT:
+ gainLeft >>= 15;
+ gainRight >>= 15;
+ for (src = dest = 0; src < numSamples; src++, dest+=2)
+ {
+ pMixBuffer[dest] += (pInputBuffer[src] * gainLeft) >> NUM_MIXER_GUARD_BITS;
+ pMixBuffer[dest+1] += (pInputBuffer[src] * gainRight) >> NUM_MIXER_GUARD_BITS;
+ }
+ break;
+
+ /* stereo to mono */
+ case MIX_FLAGS_STEREO_SOURCE:
+ gainLeft >>= 15;
+ gainRight >>= 15;
+ for (src = dest = 0; src < numSamples; src+=2, dest++)
+ {
+ temp = (pInputBuffer[src] * gainLeft) >> NUM_MIXER_GUARD_BITS;
+ temp += ((pInputBuffer[src+1] * gainRight) >> NUM_MIXER_GUARD_BITS);
+ pMixBuffer[dest] += temp;
+ }
+ break;
+
+ /* stereo to stereo */
+ case MIX_FLAGS_STEREO_SOURCE | MIX_FLAGS_STEREO_OUTPUT:
+ gainLeft >>= 15;
+ gainRight >>= 15;
+ for (src = dest = 0; src < numSamples; src+=2, dest+=2)
+ {
+ pMixBuffer[dest] += (pInputBuffer[src] * gainLeft) >> NUM_MIXER_GUARD_BITS;
+ pMixBuffer[dest+1] += (pInputBuffer[src+1] * gainRight) >> NUM_MIXER_GUARD_BITS;
+ }
+ break;
+ }
+ }
+
+ /* gain change - do gain increment */
+ else
+ {
+ switch (flags & (MIX_FLAGS_STEREO_SOURCE | MIX_FLAGS_STEREO_OUTPUT))
+ {
+ /* mono to mono */
+ case 0:
+ for (src = dest = 0; src < numSamples; src++, dest++)
+ {
+ gainLeft += gainIncLeft;
+ pMixBuffer[dest] += (pInputBuffer[src] * (gainLeft >> 15)) >> NUM_MIXER_GUARD_BITS;
+ }
+ break;
+
+ /* mono to stereo */
+ case MIX_FLAGS_STEREO_OUTPUT:
+ for (src = dest = 0; src < numSamples; src++, dest+=2)
+ {
+ gainLeft += gainIncLeft;
+ gainRight += gainIncRight;
+ pMixBuffer[dest] += (pInputBuffer[src] * (gainLeft >> 15)) >> NUM_MIXER_GUARD_BITS;
+ pMixBuffer[dest+1] += (pInputBuffer[src] * (gainRight >> 15)) >> NUM_MIXER_GUARD_BITS;
+ }
+ break;
+
+ /* stereo to mono */
+ case MIX_FLAGS_STEREO_SOURCE:
+ for (src = dest = 0; src < numSamples; src+=2, dest++)
+ {
+ gainLeft += gainIncLeft;
+ gainRight += gainIncRight;
+ temp = (pInputBuffer[src] * (gainLeft >> 15)) >> NUM_MIXER_GUARD_BITS;
+ temp += ((pInputBuffer[src+1] * (gainRight >> 15)) >> NUM_MIXER_GUARD_BITS);
+ pMixBuffer[dest] += temp;
+ }
+ break;
+
+ /* stereo to stereo */
+ case MIX_FLAGS_STEREO_SOURCE | MIX_FLAGS_STEREO_OUTPUT:
+ for (src = dest = 0; src < numSamples; src+=2, dest+=2)
+ {
+ gainLeft += gainIncLeft;
+ gainRight += gainIncRight;
+ pMixBuffer[dest] += (pInputBuffer[src] * (gainLeft >> 15)) >> NUM_MIXER_GUARD_BITS;
+ pMixBuffer[dest+1] += (pInputBuffer[src+1] * (gainRight >> 15)) >> NUM_MIXER_GUARD_BITS;
+ }
+ break;
+ }
+ }
+}
+#endif
+#endif
+