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Diffstat (limited to 'media/libeffects/lvm/lib/Bundle/src/LVM_Buffers.c')
-rw-r--r--media/libeffects/lvm/lib/Bundle/src/LVM_Buffers.c870
1 files changed, 0 insertions, 870 deletions
diff --git a/media/libeffects/lvm/lib/Bundle/src/LVM_Buffers.c b/media/libeffects/lvm/lib/Bundle/src/LVM_Buffers.c
deleted file mode 100644
index 6cbee7d..0000000
--- a/media/libeffects/lvm/lib/Bundle/src/LVM_Buffers.c
+++ /dev/null
@@ -1,870 +0,0 @@
-/*
- * Copyright (C) 2004-2010 NXP Software
- * Copyright (C) 2010 The Android Open Source Project
- *
- * 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.
- */
-
-
-/****************************************************************************************/
-/* */
-/* Includes */
-/* */
-/****************************************************************************************/
-
-#include "LVM_Private.h"
-#include "VectorArithmetic.h"
-
-/****************************************************************************************/
-/* */
-/* FUNCTION: LVM_BufferManagedIn */
-/* */
-/* DESCRIPTION: */
-/* Full buffer management allowing the user to provide input and output buffers on */
-/* any alignment and with any number of samples. The alignment is corrected within */
-/* the buffer management and the samples are grouped in to blocks of the correct size */
-/* before processing. */
-/* */
-/* PARAMETERS: */
-/* hInstance - Instance handle */
-/* pInData - Pointer to the input data stream */
-/* *pToProcess - Pointer to pointer to the start of data processing */
-/* *pProcessed - Pointer to pointer to the destination of the processed data */
-/* pNumSamples - Pointer to the number of samples to process */
-/* */
-/* RETURNS: */
-/* None */
-/* */
-/* NOTES: */
-/* */
-/****************************************************************************************/
-
-void LVM_BufferManagedIn(LVM_Handle_t hInstance,
- const LVM_INT16 *pInData,
- LVM_INT16 **pToProcess,
- LVM_INT16 **pProcessed,
- LVM_UINT16 *pNumSamples)
-{
-
- LVM_INT16 SampleCount; /* Number of samples to be processed this call */
- LVM_INT16 NumSamples; /* Number of samples in scratch buffer */
- LVM_INT16 *pStart;
- LVM_Instance_t *pInstance = (LVM_Instance_t *)hInstance;
- LVM_Buffer_t *pBuffer;
- LVM_INT16 *pDest;
- LVM_INT16 NumChannels =2;
-
-
- /*
- * Set the processing address pointers
- */
- pBuffer = pInstance->pBufferManagement;
- pDest = pBuffer->pScratch;
- *pToProcess = pBuffer->pScratch;
- *pProcessed = pBuffer->pScratch;
-
- /*
- * Check if it is the first call of a block
- */
- if (pInstance->SamplesToProcess == 0)
- {
- /*
- * First call for a new block of samples
- */
- pInstance->SamplesToProcess = (LVM_INT16)(*pNumSamples + pBuffer->InDelaySamples);
- pInstance->pInputSamples = (LVM_INT16 *)pInData;
- pBuffer->BufferState = LVM_FIRSTCALL;
- }
- pStart = pInstance->pInputSamples; /* Pointer to the input samples */
- pBuffer->SamplesToOutput = 0; /* Samples to output is same as number read for inplace processing */
-
-
- /*
- * Calculate the number of samples to process this call and update the buffer state
- */
- if (pInstance->SamplesToProcess > pInstance->InternalBlockSize)
- {
- /*
- * Process the maximum bock size of samples.
- */
- SampleCount = pInstance->InternalBlockSize;
- NumSamples = pInstance->InternalBlockSize;
- }
- else
- {
- /*
- * Last call for the block, so calculate how many frames and samples to process
- */
- LVM_INT16 NumFrames;
-
- NumSamples = pInstance->SamplesToProcess;
- NumFrames = (LVM_INT16)(NumSamples >> MIN_INTERNAL_BLOCKSHIFT);
- SampleCount = (LVM_INT16)(NumFrames << MIN_INTERNAL_BLOCKSHIFT);
-
- /*
- * Update the buffer state
- */
- if (pBuffer->BufferState == LVM_FIRSTCALL)
- {
- pBuffer->BufferState = LVM_FIRSTLASTCALL;
- }
- else
- {
- pBuffer->BufferState = LVM_LASTCALL;
- }
- }
- *pNumSamples = (LVM_UINT16)SampleCount; /* Set the number of samples to process this call */
-
-
- /*
- * Copy samples from the delay buffer as required
- */
- if (((pBuffer->BufferState == LVM_FIRSTCALL) ||
- (pBuffer->BufferState == LVM_FIRSTLASTCALL)) &&
- (pBuffer->InDelaySamples != 0))
- {
- Copy_16(&pBuffer->InDelayBuffer[0], /* Source */
- pDest, /* Destination */
- (LVM_INT16)(NumChannels*pBuffer->InDelaySamples)); /* Number of delay samples, left and right */
- NumSamples = (LVM_INT16)(NumSamples - pBuffer->InDelaySamples); /* Update sample count */
- pDest += NumChannels * pBuffer->InDelaySamples; /* Update the destination pointer */
- }
-
-
- /*
- * Copy the rest of the samples for this call from the input buffer
- */
- if (NumSamples > 0)
- {
- Copy_16(pStart, /* Source */
- pDest, /* Destination */
- (LVM_INT16)(NumChannels*NumSamples)); /* Number of input samples */
- pStart += NumChannels * NumSamples; /* Update the input pointer */
-
- /*
- * Update the input data pointer and samples to output
- */
- pBuffer->SamplesToOutput = (LVM_INT16)(pBuffer->SamplesToOutput + NumSamples); /* Update samples to output */
- }
-
-
- /*
- * Update the sample count and input pointer
- */
- pInstance->SamplesToProcess = (LVM_INT16)(pInstance->SamplesToProcess - SampleCount); /* Update the count of samples */
- pInstance->pInputSamples = pStart; /* Update input sample pointer */
-
-
- /*
- * Save samples to the delay buffer if any left unprocessed
- */
- if ((pBuffer->BufferState == LVM_FIRSTLASTCALL) ||
- (pBuffer->BufferState == LVM_LASTCALL))
- {
- NumSamples = pInstance->SamplesToProcess;
- pStart = pBuffer->pScratch; /* Start of the buffer */
- pStart += NumChannels*SampleCount; /* Offset by the number of processed samples */
- if (NumSamples != 0)
- {
- Copy_16(pStart, /* Source */
- &pBuffer->InDelayBuffer[0], /* Destination */
- (LVM_INT16)(NumChannels*NumSamples)); /* Number of input samples */
- }
-
-
- /*
- * Update the delay sample count
- */
- pBuffer->InDelaySamples = NumSamples; /* Number of delay sample pairs */
- pInstance->SamplesToProcess = 0; /* All Samples used */
- }
-}
-
-
-/****************************************************************************************/
-/* */
-/* FUNCTION: LVM_BufferUnmanagedIn */
-/* */
-/* DESCRIPTION: */
-/* This mode is selected by the user code and disables the buffer management with the */
-/* exception of the maximum block size processing. The user must ensure that the */
-/* input and output buffers are 32-bit aligned and also that the number of samples to */
-/* process is a correct multiple of samples. */
-/* */
-/* PARAMETERS: */
-/* hInstance - Instance handle */
-/* *pToProcess - Pointer to the start of data processing */
-/* *pProcessed - Pointer to the destination of the processed data */
-/* pNumSamples - Pointer to the number of samples to process */
-/* */
-/* RETURNS: */
-/* None */
-/* */
-/* NOTES: */
-/* */
-/****************************************************************************************/
-
-void LVM_BufferUnmanagedIn(LVM_Handle_t hInstance,
- LVM_INT16 **pToProcess,
- LVM_INT16 **pProcessed,
- LVM_UINT16 *pNumSamples)
-{
-
- LVM_Instance_t *pInstance = (LVM_Instance_t *)hInstance;
-
-
- /*
- * Check if this is the first call of a block
- */
- if (pInstance->SamplesToProcess == 0)
- {
- pInstance->SamplesToProcess = (LVM_INT16)*pNumSamples; /* Get the number of samples on first call */
- pInstance->pInputSamples = *pToProcess; /* Get the I/O pointers */
- pInstance->pOutputSamples = *pProcessed;
-
-
- /*
- * Set te block size to process
- */
- if (pInstance->SamplesToProcess > pInstance->InternalBlockSize)
- {
- *pNumSamples = (LVM_UINT16)pInstance->InternalBlockSize;
- }
- else
- {
- *pNumSamples = (LVM_UINT16)pInstance->SamplesToProcess;
- }
- }
-
- /*
- * Set the process pointers
- */
- *pToProcess = pInstance->pInputSamples;
- *pProcessed = pInstance->pOutputSamples;
-}
-
-
-/****************************************************************************************/
-/* */
-/* FUNCTION: LVM_BufferOptimisedIn */
-/* */
-/* DESCRIPTION: */
-/* Optimised buffer management for the case where the data is outplace processing, */
-/* the output data is 32-bit aligned and there are sufficient samples to allow some */
-/* processing directly in the output buffer. This saves one data copy per sample */
-/* compared with the unoptimsed version. */
-/* */
-/* PARAMETERS: */
-/* hInstance - Instance handle */
-/* pInData - Pointer to the input data stream */
-/* *pToProcess - Pointer to the start of data processing */
-/* *pProcessed - Pointer to the destination of the processed data */
-/* pNumSamples - Pointer to the number of samples to process */
-/* */
-/* RETURNS: */
-/* None */
-/* */
-/* NOTES: */
-/* */
-/****************************************************************************************/
-
-void LVM_BufferOptimisedIn(LVM_Handle_t hInstance,
- const LVM_INT16 *pInData,
- LVM_INT16 **pToProcess,
- LVM_INT16 **pProcessed,
- LVM_UINT16 *pNumSamples)
-{
-
- LVM_Instance_t *pInstance = (LVM_Instance_t *)hInstance;
- LVM_Buffer_t *pBuffer = pInstance->pBufferManagement;
- LVM_INT16 *pDest;
- LVM_INT16 SampleCount;
- LVM_INT16 NumSamples;
- LVM_INT16 NumFrames;
-
- /*
- * Check if it is the first call for this block
- */
- if (pInstance->SamplesToProcess == 0)
- {
- /*
- * First call for a new block of samples
- */
- pBuffer->BufferState = LVM_FIRSTCALL;
- pInstance->pInputSamples = (LVM_INT16 *)pInData;
- pInstance->SamplesToProcess = (LVM_INT16)*pNumSamples;
- pBuffer->SamplesToOutput = (LVM_INT16)*pNumSamples;
- pDest = *pProcessed; /* The start of the output buffer */
-
-
- /*
- * Copy the already processed samples to the output buffer
- */
- if (pBuffer->OutDelaySamples != 0)
- {
- Copy_16(&pBuffer->OutDelayBuffer[0], /* Source */
- pDest, /* Detsination */
- (LVM_INT16)(2*pBuffer->OutDelaySamples)); /* Number of delay samples */
- pDest += 2 * pBuffer->OutDelaySamples; /* Update the output pointer */
- pBuffer->SamplesToOutput = (LVM_INT16)(pBuffer->SamplesToOutput - pBuffer->OutDelaySamples); /* Update the numbr of samples to output */
- }
- *pToProcess = pDest; /* Set the address to start processing */
- *pProcessed = pDest; /* Process in the output buffer, now inplace */
-
- /*
- * Copy the input delay buffer (unprocessed) samples to the output buffer
- */
- if (pBuffer->InDelaySamples != 0)
- {
- Copy_16(&pBuffer->InDelayBuffer[0], /* Source */
- pDest, /* Destination */
- (LVM_INT16)(2*pBuffer->InDelaySamples)); /* Number of delay samples */
- pDest += 2 * pBuffer->InDelaySamples; /* Update the output pointer */
- }
-
-
- /*
- * Calculate how many input samples to process and copy
- */
- NumSamples = (LVM_INT16)(*pNumSamples - pBuffer->OutDelaySamples); /* Number that will fit in the output buffer */
- if (NumSamples >= pInstance->InternalBlockSize)
- {
- NumSamples = pInstance->InternalBlockSize;
- }
- NumFrames = (LVM_INT16)(NumSamples >> MIN_INTERNAL_BLOCKSHIFT);
- SampleCount = (LVM_INT16)(NumFrames << MIN_INTERNAL_BLOCKSHIFT);
- *pNumSamples = (LVM_UINT16)SampleCount; /* The number of samples to process */
- pBuffer->SamplesToOutput = (LVM_INT16)(pBuffer->SamplesToOutput - SampleCount); /* Update the number of samples to output */
- SampleCount = (LVM_INT16)(SampleCount - pBuffer->InDelaySamples); /* The number of samples to copy from the input */
-
-
- /*
- * Copy samples from the input buffer and update counts and pointers
- */
- Copy_16(pInstance->pInputSamples, /* Source */
- pDest, /* Destination */
- (LVM_INT16)(2*SampleCount)); /* Number of input samples */
- pInstance->pInputSamples += 2 * SampleCount; /* Update the input pointer */
- pInstance->pOutputSamples = pDest + (2 * SampleCount); /* Update the output pointer */
- pInstance->SamplesToProcess = (LVM_INT16)(pInstance->SamplesToProcess - SampleCount); /* Samples left in the input buffer */
- }
- else
- {
- /*
- * Second or subsequent call in optimised mode
- */
- if (pBuffer->SamplesToOutput >= MIN_INTERNAL_BLOCKSIZE)
- {
- /*
- * More samples can be processed directly in the output buffer
- */
- *pToProcess = pInstance->pOutputSamples; /* Set the address to start processing */
- *pProcessed = pInstance->pOutputSamples; /* Process in the output buffer, now inplace */
- NumSamples = pBuffer->SamplesToOutput; /* Number that will fit in the output buffer */
- if (NumSamples >= pInstance->InternalBlockSize)
- {
- NumSamples = pInstance->InternalBlockSize;
- }
- NumFrames = (LVM_INT16)(NumSamples >> MIN_INTERNAL_BLOCKSHIFT);
- SampleCount = (LVM_INT16)(NumFrames << MIN_INTERNAL_BLOCKSHIFT);
- *pNumSamples = (LVM_UINT16)SampleCount; /* The number of samples to process */
-
-
- /*
- * Copy samples from the input buffer and update counts and pointers
- */
- Copy_16(pInstance->pInputSamples, /* Source */
- pInstance->pOutputSamples, /* Destination */
- (LVM_INT16)(2*SampleCount)); /* Number of input samples */
- pInstance->pInputSamples += 2 * SampleCount; /* Update the input pointer */
- pInstance->pOutputSamples += 2 * SampleCount; /* Update the output pointer */
- pInstance->SamplesToProcess = (LVM_INT16)(pInstance->SamplesToProcess - SampleCount); /* Samples left in the input buffer */
- pBuffer->SamplesToOutput = (LVM_INT16)(pBuffer->SamplesToOutput - SampleCount); /* Number that will fit in the output buffer */
- }
- else
- {
- /*
- * The remaining samples can not be processed in the output buffer
- */
- pBuffer->BufferState = LVM_LASTCALL; /* Indicate this is the last bock to process */
- *pToProcess = pBuffer->pScratch; /* Set the address to start processing */
- *pProcessed = pBuffer->pScratch; /* Process in the output buffer, now inplace */
- NumSamples = pInstance->SamplesToProcess; /* Number left to be processed */
- NumFrames = (LVM_INT16)(NumSamples >> MIN_INTERNAL_BLOCKSHIFT);
- SampleCount = (LVM_INT16)(NumFrames << MIN_INTERNAL_BLOCKSHIFT);
- *pNumSamples = (LVM_UINT16)SampleCount; /* The number of samples to process */
-
-
- /*
- * Copy samples from the input buffer and update counts and pointers
- */
- Copy_16(pInstance->pInputSamples, /* Source */
- pBuffer->pScratch, /* Destination */
- (LVM_INT16)(2*SampleCount)); /* Number of input samples */
- pInstance->pInputSamples += 2 * SampleCount; /* Update the input pointer */
- pInstance->SamplesToProcess = (LVM_INT16)(pInstance->SamplesToProcess - SampleCount); /* Samples left in the input buffer */
- }
- }
-}
-
-/****************************************************************************************/
-/* */
-/* FUNCTION: LVM_BufferIn */
-/* */
-/* DESCRIPTION: */
-/* This function manages the data input, it has the following features: */
-/* - Accepts data in 16-bit aligned memory */
-/* - Copies the data to 32-bit aligned memory */
-/* - Converts Mono inputs to Mono-in-Stereo */
-/* - Accepts any number of samples as input, except 0 */
-/* - Breaks the input sample stream in to blocks of the configured frame size or */
-/* multiples of the frame size */
-/* - Limits the processing block size to the maximum block size. */
-/* - Works with inplace or outplace processing automatically */
-/* */
-/* To manage the data the function has a number of operating states: */
-/* LVM_FIRSTCALL - The first call for this block of input samples */
-/* LVM_MAXBLOCKCALL - The current block is the maximum size. Only used for the */
-/* second and subsequent blocks. */
-/* LVM_LASTCALL - The last call for this block of input samples */
-/* LVM_FIRSTLASTCALL - This is the first and last call for this block of input*/
-/* samples, this occurs when the number of samples to */
-/* process is less than the maximum block size. */
-/* */
-/* The function uses an internal delay buffer the size of the minimum frame, this is */
-/* used to temporarily hold samples when the number of samples to process is not a */
-/* multiple of the frame size. */
-/* */
-/* To ensure correct operation with inplace buffering the number of samples to output*/
-/* per call is calculated in this function and is set to the number of samples read */
-/* from the input buffer. */
-/* */
-/* The total number of samples to process is stored when the function is called for */
-/* the first time. The value is overwritten by the size of the block to be processed */
-/* in each call so the size of the processing blocks can be controlled. The number of */
-/* samples actually processed for each block of input samples is always a multiple of*/
-/* the frame size so for any particular block of input samples the actual number of */
-/* processed samples may not match the number of input samples, sometime it will be */
-/* sometimes less. The average is the same and the difference is never more than the */
-/* frame size. */
-/* */
-/* PARAMETERS: */
-/* hInstance - Instance handle */
-/* pInData - Pointer to the input data stream */
-/* *pToProcess - Pointer to the start of data processing */
-/* *pProcessed - Pointer to the destination of the processed data */
-/* pNumSamples - Pointer to the number of samples to process */
-/* */
-/* RETURNS: */
-/* None */
-/* */
-/* NOTES: */
-/* */
-/****************************************************************************************/
-
-void LVM_BufferIn(LVM_Handle_t hInstance,
- const LVM_INT16 *pInData,
- LVM_INT16 **pToProcess,
- LVM_INT16 **pProcessed,
- LVM_UINT16 *pNumSamples)
-{
-
- LVM_Instance_t *pInstance = (LVM_Instance_t *)hInstance;
-
-
- /*
- * Check which mode, managed or unmanaged
- */
- if (pInstance->InstParams.BufferMode == LVM_MANAGED_BUFFERS)
- {
- LVM_BufferManagedIn(hInstance,
- pInData,
- pToProcess,
- pProcessed,
- pNumSamples);
- }
- else
- {
- LVM_BufferUnmanagedIn(hInstance,
- pToProcess,
- pProcessed,
- pNumSamples);
- }
-}
-
-/****************************************************************************************/
-/* */
-/* FUNCTION: LVM_BufferManagedOut */
-/* */
-/* DESCRIPTION: */
-/* Full buffer management output. This works in conjunction with the managed input */
-/* routine and ensures the correct number of samples are always output to the output */
-/* buffer. */
-/* */
-/* PARAMETERS: */
-/* hInstance - Instance handle */
-/* pOutData - Pointer to the output data stream */
-/* pNumSamples - Pointer to the number of samples to process */
-/* */
-/* RETURNS: */
-/* None */
-/* */
-/* NOTES: */
-/* */
-/****************************************************************************************/
-
-void LVM_BufferManagedOut(LVM_Handle_t hInstance,
- LVM_INT16 *pOutData,
- LVM_UINT16 *pNumSamples)
-{
-
- LVM_Instance_t *pInstance = (LVM_Instance_t *)hInstance;
- LVM_Buffer_t *pBuffer = pInstance->pBufferManagement;
- LVM_INT16 SampleCount = (LVM_INT16)*pNumSamples;
- LVM_INT16 NumSamples;
- LVM_INT16 *pStart;
- LVM_INT16 *pDest;
-
-
- /*
- * Set the pointers
- */
- NumSamples = pBuffer->SamplesToOutput;
- pStart = pBuffer->pScratch;
-
-
- /*
- * check if it is the first call of a block
- */
- if ((pBuffer->BufferState == LVM_FIRSTCALL) ||
- (pBuffer->BufferState == LVM_FIRSTLASTCALL))
- {
- /* First call for a new block */
- pInstance->pOutputSamples = pOutData; /* Initialise the destination */
- }
- pDest = pInstance->pOutputSamples; /* Set the output address */
-
-
- /*
- * If the number of samples is non-zero then there are still samples to send to
- * the output buffer
- */
- if ((NumSamples != 0) &&
- (pBuffer->OutDelaySamples != 0))
- {
- /*
- * Copy the delayed output buffer samples to the output
- */
- if (pBuffer->OutDelaySamples <= NumSamples)
- {
- /*
- * Copy all output delay samples to the output
- */
- Copy_16(&pBuffer->OutDelayBuffer[0], /* Source */
- pDest, /* Detsination */
- (LVM_INT16)(2*pBuffer->OutDelaySamples)); /* Number of delay samples */
-
- /*
- * Update the pointer and sample counts
- */
- pDest += 2*pBuffer->OutDelaySamples; /* Output sample pointer */
- NumSamples = (LVM_INT16)(NumSamples - pBuffer->OutDelaySamples); /* Samples left to send */
- pBuffer->OutDelaySamples = 0; /* No samples left in the buffer */
-
- }
- else
- {
- /*
- * Copy only some of the ouput delay samples to the output
- */
- Copy_16(&pBuffer->OutDelayBuffer[0], /* Source */
- pDest, /* Detsination */
- (LVM_INT16)(2*NumSamples)); /* Number of delay samples */
-
- /*
- * Update the pointer and sample counts
- */
- pDest += 2*NumSamples; /* Output sample pointer */
- pBuffer->OutDelaySamples = (LVM_INT16)(pBuffer->OutDelaySamples - NumSamples); /* No samples left in the buffer */
-
-
- /*
- * Realign the delay buffer data to avoid using circular buffer management
- */
- Copy_16(&pBuffer->OutDelayBuffer[2*NumSamples], /* Source */
- &pBuffer->OutDelayBuffer[0], /* Destination */
- (LVM_INT16)(2*pBuffer->OutDelaySamples)); /* Number of samples to move */
- NumSamples = 0; /* Samples left to send */
- }
- }
-
-
- /*
- * Copy the processed results to the output
- */
- if ((NumSamples != 0) &&
- (SampleCount != 0))
- {
- if (SampleCount <= NumSamples)
- {
- /*
- * Copy all processed samples to the output
- */
- Copy_16(pStart, /* Source */
- pDest, /* Detsination */
- (LVM_INT16)(2*SampleCount)); /* Number of processed samples */
-
- /*
- * Update the pointer and sample counts
- */
- pDest += 2 * SampleCount; /* Output sample pointer */
- NumSamples = (LVM_INT16)(NumSamples - SampleCount); /* Samples left to send */
- SampleCount = 0; /* No samples left in the buffer */
- }
- else
- {
- /*
- * Copy only some processed samples to the output
- */
- Copy_16(pStart, /* Source */
- pDest, /* Destination */
- (LVM_INT16)(2*NumSamples)); /* Number of processed samples */
-
-
- /*
- * Update the pointers and sample counts
- */
- pStart += 2 * NumSamples; /* Processed sample pointer */
- pDest += 2 * NumSamples; /* Output sample pointer */
- SampleCount = (LVM_INT16)(SampleCount - NumSamples); /* Processed samples left */
- NumSamples = 0; /* Clear the sample count */
- }
- }
-
-
- /*
- * Copy the remaining processed data to the output delay buffer
- */
- if (SampleCount != 0)
- {
- Copy_16(pStart, /* Source */
- &pBuffer->OutDelayBuffer[2*pBuffer->OutDelaySamples], /* Destination */
- (LVM_INT16)(2*SampleCount)); /* Number of processed samples */
- pBuffer->OutDelaySamples = (LVM_INT16)(pBuffer->OutDelaySamples + SampleCount); /* Update the buffer count */
- }
-
-
- /*
- * pointers, counts and set default buffer processing
- */
- pBuffer->SamplesToOutput = NumSamples; /* Samples left to send */
- pInstance->pOutputSamples = pDest; /* Output sample pointer */
- pBuffer->BufferState = LVM_MAXBLOCKCALL; /* Set for the default call block size */
- *pNumSamples = (LVM_UINT16)pInstance->SamplesToProcess; /* This will terminate the loop when all samples processed */
-}
-
-
-/****************************************************************************************/
-/* */
-/* FUNCTION: LVM_BufferUnmanagedOut */
-/* */
-/* DESCRIPTION: */
-/* This works in conjunction with the unmanaged input routine and updates the number */
-/* of samples left to be processed and adjusts the buffer pointers. */
-/* */
-/* PARAMETERS: */
-/* hInstance - Instance handle */
-/* pNumSamples - Pointer to the number of samples to process */
-/* */
-/* RETURNS: */
-/* None */
-/* */
-/* NOTES: */
-/* */
-/****************************************************************************************/
-
-void LVM_BufferUnmanagedOut(LVM_Handle_t hInstance,
- LVM_UINT16 *pNumSamples)
-{
-
- LVM_Instance_t *pInstance = (LVM_Instance_t *)hInstance;
- LVM_INT16 NumChannels =2;
-
-
- /*
- * Update sample counts
- */
- pInstance->pInputSamples += (LVM_INT16)(*pNumSamples * NumChannels); /* Update the I/O pointers */
- pInstance->pOutputSamples += (LVM_INT16)(*pNumSamples * 2);
- pInstance->SamplesToProcess = (LVM_INT16)(pInstance->SamplesToProcess - *pNumSamples); /* Update the sample count */
-
- /*
- * Set te block size to process
- */
- if (pInstance->SamplesToProcess > pInstance->InternalBlockSize)
- {
- *pNumSamples = (LVM_UINT16)pInstance->InternalBlockSize;
- }
- else
- {
- *pNumSamples = (LVM_UINT16)pInstance->SamplesToProcess;
- }
-}
-
-
-/****************************************************************************************/
-/* */
-/* FUNCTION: LVM_BufferOptimisedOut */
-/* */
-/* DESCRIPTION: */
-/* This works in conjunction with the optimised input routine and copies the last few */
-/* processed and unprocessed samples to their respective buffers. */
-/* */
-/* PARAMETERS: */
-/* hInstance - Instance handle */
-/* pNumSamples - Pointer to the number of samples to process */
-/* */
-/* RETURNS: */
-/* None */
-/* */
-/* NOTES: */
-/* */
-/****************************************************************************************/
-
-void LVM_BufferOptimisedOut(LVM_Handle_t hInstance,
- LVM_UINT16 *pNumSamples)
-{
-
- LVM_Instance_t *pInstance = (LVM_Instance_t *)hInstance;
- LVM_Buffer_t *pBuffer = pInstance->pBufferManagement;
-
- /*
- * Check if it is the last block to process
- */
- if (pBuffer->BufferState == LVM_LASTCALL)
- {
- LVM_INT16 *pSrc = pBuffer->pScratch;
-
- /*
- * Copy the unprocessed samples to the input delay buffer
- */
- if (pInstance->SamplesToProcess != 0)
- {
- Copy_16(pInstance->pInputSamples, /* Source */
- &pBuffer->InDelayBuffer[0], /* Destination */
- (LVM_INT16)(2*pInstance->SamplesToProcess)); /* Number of input samples */
- pBuffer->InDelaySamples = pInstance->SamplesToProcess;
- pInstance->SamplesToProcess = 0;
- }
- else
- {
- pBuffer->InDelaySamples = 0;
- }
-
-
- /*
- * Fill the last empty spaces in the output buffer
- */
- if (pBuffer->SamplesToOutput != 0)
- {
- Copy_16(pSrc, /* Source */
- pInstance->pOutputSamples, /* Destination */
- (LVM_INT16)(2*pBuffer->SamplesToOutput)); /* Number of input samples */
- *pNumSamples = (LVM_UINT16)(*pNumSamples - pBuffer->SamplesToOutput);
- pSrc += 2 * pBuffer->SamplesToOutput; /* Update scratch pointer */
- pBuffer->SamplesToOutput = 0; /* No more samples in this block */
- }
-
-
- /*
- * Save any remaining processed samples in the output delay buffer
- */
- if (*pNumSamples != 0)
- {
- Copy_16(pSrc, /* Source */
- &pBuffer->OutDelayBuffer[0], /* Destination */
- (LVM_INT16)(2**pNumSamples)); /* Number of input samples */
-
- pBuffer->OutDelaySamples = (LVM_INT16)*pNumSamples;
-
- *pNumSamples = 0; /* No more samples in this block */
- }
- else
- {
- pBuffer->OutDelaySamples = 0;
- }
- }
-}
-
-
-/****************************************************************************************/
-/* */
-/* FUNCTION: LVM_BufferOut */
-/* */
-/* DESCRIPTION: */
-/* This function manages the data output, it has the following features: */
-/* - Output data to 16-bit aligned memory */
-/* - Reads data from 32-bit aligned memory */
-/* - Reads data only in blocks of frame size or multiples of frame size */
-/* - Writes the same number of samples as the LVM_BufferIn function reads */
-/* - Works with inplace or outplace processing automatically */
-/* */
-/* To manage the data the function has a number of operating states: */
-/* LVM_FIRSTCALL - The first call for this block of input samples */
-/* LVM_FIRSTLASTCALL - This is the first and last call for this block of input*/
-/* samples, this occurs when the number of samples to */
-/* process is less than the maximum block size. */
-/* */
-/* The function uses an internal delay buffer the size of the minimum frame, this is */
-/* used to temporarily hold samples when the number of samples to write is not a */
-/* multiple of the frame size. */
-/* */
-/* To ensure correct operation with inplace buffering the number of samples to output*/
-/* per call is always the same as the number of samples read from the input buffer. */
-/* */
-/* PARAMETERS: */
-/* hInstance - Instance handle */
-/* pOutData - Pointer to the output data stream */
-/* pNumSamples - Pointer to the number of samples to process */
-/* */
-/* RETURNS: */
-/* None */
-/* */
-/* NOTES: */
-/* */
-/****************************************************************************************/
-
-void LVM_BufferOut(LVM_Handle_t hInstance,
- LVM_INT16 *pOutData,
- LVM_UINT16 *pNumSamples)
-{
-
- LVM_Instance_t *pInstance = (LVM_Instance_t *)hInstance;
-
-
- /*
- * Check which mode, managed or unmanaged
- */
- if (pInstance->InstParams.BufferMode == LVM_MANAGED_BUFFERS)
- {
- LVM_BufferManagedOut(hInstance,
- pOutData,
- pNumSamples);
- }
- else
- {
- LVM_BufferUnmanagedOut(hInstance,
- pNumSamples);
- }
-}
-
generated by cgit v1.1 at 2024-06-09 18:47:52 +0000