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//
// SampleSourcePcm.c - MrsWatson
// Created by Nik Reiman on 1/2/12.
// Copyright (c) 2012 Teragon Audio. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "audio/AudioSettings.h"
#include "base/PlatformInfo.h"
#include "io/SampleSourcePcm.h"
#include "logging/EventLogger.h"
static boolByte openSampleSourcePcm(void *sampleSourcePtr, const SampleSourceOpenAs openAs)
{
SampleSource sampleSource = (SampleSource)sampleSourcePtr;
SampleSourcePcmData extraData = (SampleSourcePcmData)(sampleSource->extraData);
extraData->dataBufferNumItems = 0;
if (openAs == SAMPLE_SOURCE_OPEN_READ) {
if (charStringIsEqualToCString(sampleSource->sourceName, "-", false)) {
extraData->fileHandle = stdin;
charStringCopyCString(sampleSource->sourceName, "stdin");
extraData->isStream = true;
} else {
extraData->fileHandle = fopen(sampleSource->sourceName->data, "rb");
}
} else if (openAs == SAMPLE_SOURCE_OPEN_WRITE) {
if (charStringIsEqualToCString(sampleSource->sourceName, "-", false)) {
extraData->fileHandle = stdout;
charStringCopyCString(sampleSource->sourceName, "stdout");
extraData->isStream = true;
} else {
extraData->fileHandle = fopen(sampleSource->sourceName->data, "wb");
}
} else {
logInternalError("Invalid type for openAs in PCM file");
return false;
}
if (extraData->fileHandle == NULL) {
logError("PCM File '%s' could not be opened for %s",
sampleSource->sourceName->data, openAs == SAMPLE_SOURCE_OPEN_READ ? "reading" : "writing");
return false;
}
sampleSource->openedAs = openAs;
return true;
}
size_t sampleSourcePcmRead(SampleSourcePcmData self, SampleBuffer sampleBuffer)
{
size_t pcmSamplesRead = 0;
if (self == NULL || self->fileHandle == NULL) {
logCritical("Corrupt PCM data structure");
return 0;
}
if (self->dataBufferNumItems < (size_t)(sampleBuffer->numChannels * sampleBuffer->blocksize)) {
self->dataBufferNumItems = (size_t)(sampleBuffer->numChannels * sampleBuffer->blocksize);
self->interlacedPcmDataBuffer = (short *)realloc(self->interlacedPcmDataBuffer, sizeof(short) * self->dataBufferNumItems);
}
// Clear the PCM data buffer, or else the last block will have dirty samples in the end
memset(self->interlacedPcmDataBuffer, 0, sizeof(short) * self->dataBufferNumItems);
pcmSamplesRead = fread(self->interlacedPcmDataBuffer, sizeof(short), self->dataBufferNumItems, self->fileHandle);
if (pcmSamplesRead < self->dataBufferNumItems) {
logDebug("End of PCM file reached");
// Set the blocksize of the sample buffer to be the number of frames read
sampleBuffer->blocksize = pcmSamplesRead / sampleBuffer->numChannels;
}
logDebug("Read %d samples from PCM file", pcmSamplesRead);
sampleBufferCopyPcmSamples(sampleBuffer, self->interlacedPcmDataBuffer);
return pcmSamplesRead;
}
static boolByte readBlockFromPcmFile(void *sampleSourcePtr, SampleBuffer sampleBuffer)
{
SampleSource sampleSource = (SampleSource)sampleSourcePtr;
SampleSourcePcmData extraData = (SampleSourcePcmData)(sampleSource->extraData);
SampleCount originalBlocksize = sampleBuffer->blocksize;
size_t samplesRead = sampleSourcePcmRead(extraData, sampleBuffer);
sampleSource->numSamplesProcessed += samplesRead;
return (boolByte)(originalBlocksize == sampleBuffer->blocksize);
}
size_t sampleSourcePcmWrite(SampleSourcePcmData self, const SampleBuffer sampleBuffer)
{
size_t pcmSamplesWritten = 0;
size_t numSamplesToWrite = (size_t)(sampleBuffer->numChannels * sampleBuffer->blocksize);
if (self == NULL || self->fileHandle == NULL) {
logCritical("Corrupt PCM data structure");
return false;
}
if (self->dataBufferNumItems < (size_t)(sampleBuffer->numChannels * sampleBuffer->blocksize)) {
self->dataBufferNumItems = (size_t)(sampleBuffer->numChannels * sampleBuffer->blocksize);
self->interlacedPcmDataBuffer = (short *)realloc(self->interlacedPcmDataBuffer, sizeof(short) * self->dataBufferNumItems);
}
// Clear the PCM data buffer just to be safe
memset(self->interlacedPcmDataBuffer, 0, sizeof(short) * self->dataBufferNumItems);
boolByte isLittleEndian = (boolByte)(self->isLittleEndian != platformInfoIsLittleEndian());
sampleBufferGetPcmSamples(sampleBuffer, self->interlacedPcmDataBuffer, isLittleEndian);
pcmSamplesWritten = fwrite(self->interlacedPcmDataBuffer, sizeof(short), numSamplesToWrite, self->fileHandle);
if (pcmSamplesWritten < numSamplesToWrite) {
logWarn("Short write to PCM file");
return pcmSamplesWritten;
}
logDebug("Wrote %d samples to PCM file", pcmSamplesWritten);
return pcmSamplesWritten;
}
static boolByte writeBlockToPcmFile(void *sampleSourcePtr, const SampleBuffer sampleBuffer)
{
SampleSource sampleSource = (SampleSource)sampleSourcePtr;
SampleSourcePcmData extraData = (SampleSourcePcmData)(sampleSource->extraData);
unsigned int samplesWritten = (int)sampleSourcePcmWrite(extraData, sampleBuffer);
sampleSource->numSamplesProcessed += samplesWritten;
return (boolByte)(samplesWritten == sampleBuffer->blocksize);
}
static void _closeSampleSourcePcm(void *sampleSourcePtr)
{
SampleSource sampleSource = (SampleSource)sampleSourcePtr;
SampleSourcePcmData extraData = (SampleSourcePcmData)sampleSource->extraData;
if (extraData->fileHandle != NULL) {
fclose(extraData->fileHandle);
}
}
void sampleSourcePcmSetSampleRate(void *sampleSourcePtr, SampleRate sampleRate)
{
SampleSource sampleSource = (SampleSource)sampleSourcePtr;
SampleSourcePcmData extraData = (SampleSourcePcmData)sampleSource->extraData;
extraData->sampleRate = (unsigned int)sampleRate;
}
void sampleSourcePcmSetNumChannels(void *sampleSourcePtr, int numChannels)
{
SampleSource sampleSource = (SampleSource)sampleSourcePtr;
SampleSourcePcmData extraData = (SampleSourcePcmData)sampleSource->extraData;
extraData->numChannels = (unsigned short)numChannels;
}
void freeSampleSourceDataPcm(void *sampleSourceDataPtr)
{
SampleSourcePcmData extraData = (SampleSourcePcmData)sampleSourceDataPtr;
if (extraData->interlacedPcmDataBuffer != NULL) {
free(extraData->interlacedPcmDataBuffer);
extraData->interlacedPcmDataBuffer = NULL;
}
free(extraData);
}
SampleSource _newSampleSourcePcm(const CharString sampleSourceName)
{
SampleSource sampleSource = (SampleSource)malloc(sizeof(SampleSourceMembers));
SampleSourcePcmData extraData = (SampleSourcePcmData)malloc(sizeof(SampleSourcePcmDataMembers));
sampleSource->sampleSourceType = SAMPLE_SOURCE_TYPE_PCM;
sampleSource->openedAs = SAMPLE_SOURCE_OPEN_NOT_OPENED;
sampleSource->sourceName = newCharString();
charStringCopy(sampleSource->sourceName, sampleSourceName);
sampleSource->numSamplesProcessed = 0;
sampleSource->openSampleSource = openSampleSourcePcm;
sampleSource->readSampleBlock = readBlockFromPcmFile;
sampleSource->writeSampleBlock = writeBlockToPcmFile;
sampleSource->closeSampleSource = _closeSampleSourcePcm;
sampleSource->freeSampleSourceData = freeSampleSourceDataPcm;
extraData->isStream = false;
extraData->isLittleEndian = true;
extraData->fileHandle = NULL;
extraData->dataBufferNumItems = 0;
extraData->interlacedPcmDataBuffer = NULL;
extraData->numChannels = (unsigned short)getNumChannels();
extraData->sampleRate = (unsigned int)getSampleRate();
extraData->bitsPerSample = 16;
sampleSource->extraData = extraData;
return sampleSource;
}
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