diff options
Diffstat (limited to 'arm-fm-22k/lib_src/eas_mixer.c')
| -rw-r--r-- | arm-fm-22k/lib_src/eas_mixer.c | 464 |
1 files changed, 0 insertions, 464 deletions
diff --git a/arm-fm-22k/lib_src/eas_mixer.c b/arm-fm-22k/lib_src/eas_mixer.c deleted file mode 100644 index c4a2f9f..0000000 --- a/arm-fm-22k/lib_src/eas_mixer.c +++ /dev/null @@ -1,464 +0,0 @@ -/*----------------------------------------------------------------------------
- *
- * 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. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * 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
-
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