ref: 5df05050ee2d287b4dc9adb71dd4639f4c652013
dir: /encoder.c/
/* Encoder DLL interface module.*/
#ifdef FAAC_DLL
#include <windows.h>
#endif
#include <memory.h>
#include <string.h>
#include <stdlib.h>
#include "aacenc.h"
#include "bitstream.h" /* bit stream module */
#include "rateconv.h"
#include "enc.h" /* encoder cores */
#define BITHEADERBUFSIZE (65536)
/* ---------- functions ---------- */
faacAACStream *faacEncodeInit(faacAACConfig *ac, int *samplesToRead, int *bitBufferSize, int *headerSize)
{
int frameNumSample,delayNumSample;
int ch;
faacAACStream *as;
int startupNumFrame;
as = malloc( sizeof(faacAACStream));
if ((as->inputBuffer = (double**)malloc( ac->channels*sizeof(double*)))==NULL)
return NULL;
for (ch=0; ch < ac->channels; ch++)
{
if ((as->inputBuffer[ch]=(double*)malloc( 1024*sizeof(double)))==NULL)
return NULL;
}
if((ac->bit_rate % 1000)||(ac->bit_rate < 16000)) {
return NULL;
}
if (ac->channels != 2)
return NULL;
if ((ac->profile != MAIN_PROFILE)&&(ac->profile != LOW_PROFILE))
return NULL;
as->total_bits = 0;
as->frames = 0;
as->cur_frame = 0;
as->channels = ac->channels;
as->out_sampling_rate = ac->out_sampling_rate;
as->in_sampling_rate = ac->in_sampling_rate;
as->write_header = ac->write_header;
as->cut_off = ac->cut_off;
as->use_MS = ac->use_MS;
as->use_IS = ac->use_IS;
as->use_TNS = ac->use_TNS;
as->use_LTP = ac->use_LTP;
as->use_PNS = ac->use_PNS;
as->profile = ac->profile;
as->is_first_frame = 1;
if (ac->in_sampling_rate != ac->out_sampling_rate)
as->rc_needed = 1;
else
as->rc_needed = 0;
if (as->write_header) {
*headerSize = 17;
} else {
*headerSize = 0;
}
EncTfInit(ac, 0);
frameNumSample = 1024;
delayNumSample = 2*frameNumSample;
*samplesToRead = frameNumSample * ac->channels;
as->frame_bits = (int)(ac->bit_rate*frameNumSample/ac->out_sampling_rate+0.5);
*bitBufferSize = (int)(((as->frame_bits * 5) + 7)/8);
/* num frames to start up encoder due to delay compensation */
startupNumFrame = (delayNumSample+frameNumSample-1)/frameNumSample;
/* process audio file frame by frame */
as->cur_frame = -startupNumFrame;
as->available_bits = 8184;
if (as->rc_needed) {
as->rc_buf = RateConvInit (0, /* in: debug level */
(double)as->out_sampling_rate/(double)as->in_sampling_rate, /* in: outputRate / inputRate */
as->channels, /* in: number of channels */
-1, /* in: num taps */
-1, /* in: alpha for Kaiser window */
-1, /* in: 6dB cutoff freq / input bandwidth */
-1, /* in: 100dB cutoff freq / input bandwidth */
samplesToRead); /* out: num input samples / frame */
as->samplesToRead = *samplesToRead;
} else {
*samplesToRead = 1024*as->channels;
as->samplesToRead = *samplesToRead;
}
as->savedSize = 0;
return as;
}
int faacEncodeFrame(faacAACStream *as, short *Buffer, int Samples, unsigned char *bitBuffer, int *bitBufSize)
{
int i, j, error;
int usedNumBit, usedBytes;
int savedSamplesOut, samplesOut, curSample = 0;
BsBitStream *bitBuf;
float *dataOut;
float *data = NULL;
int totalBytes = 0;
// Is this the last (incomplete) frame
if ((Samples < as->samplesToRead)&&(Samples > 0)) {
// Padd with zeros
memset(Buffer + Samples, 0, (as->samplesToRead-Samples)*sizeof(short));
}
if (as->rc_needed && (Samples > 0)) {
savedSamplesOut = samplesOut = as->savedSize + RateConv (
as->rc_buf, /* in: buffer (handle) */
Buffer, /* in: input data[] */
as->samplesToRead, /* in: number of input samples */
&dataOut);
data = malloc((samplesOut)*sizeof(float));
for (i = 0; i < as->savedSize; i++)
data[i] = as->saved[i];
for (j = 0; i < samplesOut; i++, j++)
data[i] = dataOut[j];
} else if (Samples > 0) {
samplesOut = 1024*as->channels;
data = malloc((samplesOut)*sizeof(float));
for (i = 0; i < samplesOut; i++)
data[i] = Buffer[i];
} else
samplesOut = 1024*as->channels;
while(samplesOut >= 1024*as->channels)
{
// Process Buffer
if (Buffer) {
if (as->channels == 2)
{
if (Samples > 0)
for (i = 0; i < 1024; i++)
{
as->inputBuffer[0][i] = data[curSample+(i*2)];
as->inputBuffer[1][i] = data[curSample+(i*2)+1];
}
else // (Samples == 0) when called by faacEncodeFinish
for (i = 0; i < 1024; i++)
{
as->inputBuffer[0][i] = 0;
as->inputBuffer[1][i] = 0;
}
} else {
// No mono supported yet (basically only a problem with decoder
// the encoder in fact supports it).
return FERROR;
}
}
if (as->is_first_frame) {
EncTfFrame(as, (BsBitStream*)NULL);
as->is_first_frame = 0;
as->cur_frame++;
*bitBufSize = 0;
samplesOut -= (as->channels*1024);
curSample += (as->channels*1024);
continue;
}
bitBuf = BsOpenWrite(as->frame_bits * 10);
/* compute available number of bits */
/* frameAvailNumBit contains number of bits in reservoir */
/* variable bit rate: don't exceed bit reservoir size */
if (as->available_bits > 8184)
as->available_bits = 8184;
/* Add to frameAvailNumBit the number of bits for this frame */
as->available_bits += as->frame_bits;
/* Encode frame */
error = EncTfFrame(as, bitBuf);
if (error == FERROR)
return FERROR;
usedNumBit = BsBufferNumBit(bitBuf);
as->total_bits += usedNumBit;
// Copy bitBuf into bitBuffer here
usedBytes = (int)((usedNumBit+7)/8);
for (i = 0; i < usedBytes; i++)
bitBuffer[i+totalBytes] = bitBuf->data[i];
totalBytes += usedBytes;
BsClose(bitBuf);
/* Adjust available bit counts */
as->available_bits -= usedNumBit; /* Subtract bits used */
as->cur_frame++;
samplesOut -= (as->channels*1024);
curSample += (as->channels*1024);
}
*bitBufSize = totalBytes;
as->savedSize = samplesOut;
for (i = 0; i < samplesOut; i++)
as->saved[i] = data[curSample+i];
if (data) free(data);
return FNO_ERROR;
}
int faacEncodeFinish(faacAACStream *as, unsigned char *bitBuffer, int *bitBufSize)
{
unsigned char tmpBitBuffer[2048];
int tmpBitBufSize, i;
faacEncodeFrame(as, NULL, 0, tmpBitBuffer, &tmpBitBufSize);
for (i = 0; i < tmpBitBufSize; i++)
bitBuffer[i] = tmpBitBuffer[i];
faacEncodeFrame(as, NULL, 0, tmpBitBuffer, bitBufSize);
for (i = 0; i < *bitBufSize; i++)
bitBuffer[i+tmpBitBufSize] = tmpBitBuffer[i];
*bitBufSize += tmpBitBufSize;
return FNO_ERROR;
}
int faacEncodeFree(faacAACStream *as, unsigned char *headerBuf)
{
BsBitStream *bitHeader;
float seconds;
int bits, bytes, ch;
seconds = (float)as->out_sampling_rate/(float)1024;
seconds = (float)as->cur_frame/seconds;
/* free encoder memory */
EncTfFree();
if (as->rc_needed)
RateConvFree (as->rc_buf);
if (as->write_header)
{
int i;
static int SampleRates[] = {96000,88200,64000,48000,44100,32000,24000,22050,16000,12000,11025,8000,0};
as->total_bits += 17 * 8;
bitHeader = BsOpenWrite(BITHEADERBUFSIZE);
for (i = 0; ; i++)
{
if (SampleRates[i] == as->out_sampling_rate)
break;
else if (SampleRates[i] == 0)
{
return FERROR;
}
}
// ADIF_Header
BsPutBit(bitHeader,'A',8);
BsPutBit(bitHeader,'D',8);
BsPutBit(bitHeader,'I',8);
BsPutBit(bitHeader,'F',8);
BsPutBit(bitHeader,0,1); // Copyright present
BsPutBit(bitHeader,0,1); // Original
BsPutBit(bitHeader,0,1); // Home
BsPutBit(bitHeader,0,1); // Bitstream type
BsPutBit(bitHeader,(int)(as->total_bits/seconds),23); // Bitrate
BsPutBit(bitHeader, 0, 4); // num program config elements
// ADIF_buffer_fulness
BsPutBit(bitHeader, 0, 20);
// program_config_element
BsPutBit(bitHeader,0,4);
BsPutBit(bitHeader,as->profile,2);
BsPutBit(bitHeader,i,4);
BsPutBit(bitHeader,1,4);
BsPutBit(bitHeader,0,4);
BsPutBit(bitHeader,0,4);
BsPutBit(bitHeader,0,2);
BsPutBit(bitHeader,0,3);
BsPutBit(bitHeader,0,4);
BsPutBit(bitHeader,0,1);
BsPutBit(bitHeader,0,1);
BsPutBit(bitHeader,0,1);
// element_list
BsPutBit(bitHeader,(as->channels == 2),1);
BsPutBit(bitHeader,0,4);
ByteAlign(bitHeader);
// Comment
BsPutBit(bitHeader,0,8);
bits = BsBufferNumBit(bitHeader);
// Copy bitBuf into bitBuffer here
bytes = (int)((bits+7)/8);
for (i = 0; i < bytes; i++)
headerBuf[i] = bitHeader->data[i];
BsClose(bitHeader);
}
for (ch=0; ch < as->channels; ch++)
if(as->inputBuffer[ch]) free(as->inputBuffer[ch]);
if(as->inputBuffer) free(as->inputBuffer);
if (as) free(as);
return FNO_ERROR;
}
faacVersion *faacEncodeVersion(void)
{
faacVersion *faacv = malloc(sizeof(faacVersion));
faacv->DLLMajorVersion = 2;
faacv->DLLMinorVersion = 20;
faacv->MajorVersion = 0;
faacv->MinorVersion = 61;
strcpy(faacv->HomePage, "http://www.slimline.net/aac/");
return faacv;
}
#ifdef FAAC_DLL
BOOL APIENTRY DllMain(HANDLE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved)
{
return TRUE;
}
#else
/* You can download libsndfile from http://www.zip.com.au/~erikd/libsndfile/ */
#ifdef WIN32
#include <windows.h>
#else
#include <time.h>
#endif
#include <sndfile.h>
char *get_filename(char *pPath)
{
char *pT;
for (pT = pPath; *pPath; pPath++) {
if ((pPath[0] == '\\' || pPath[0] == ':') && pPath[1] && (pPath[1] != '\\'))
pT = pPath + 1;
}
return pT;
}
void combine_path(char *path, char *dir, char *file)
{
/* Should be a bit more sophisticated
This code assumes that the path exists */
/* Assume dir is allocated big enough */
if (dir[strlen(dir)-1] != '\\')
strcat(dir, "\\");
strcat(dir, get_filename(file));
strcpy(path, dir);
}
void usage(void)
{
printf("Usage:\n");
printf("faac.exe -options file ...\n");
printf("Options:\n");
printf(" -h Shows this help screen.\n");
printf(" -pX AAC profile (X can be LOW, or MAIN (default).\n");
printf(" -bX Bitrate in kbps (in steps of 1kbps, min. 16kbps)\n");
printf(" -pns Use PNS (Perceptual Noise Substitution).\n");
printf(" -is Use intensity stereo coding.\n");
printf(" -ms Use mid/side stereo coding.\n");
printf(" -nm Don't use mid/side stereo coding.\n");
printf(" The default for MS is intelligent switching.\n");
printf(" -nt Don't use TNS (Temporal Noise Shaping).\n");
printf(" -np Don't use LTP (Long Term Prediction).\n");
printf(" -nh No header will be written to the AAC file.\n");
printf(" -oX Set output directory.\n");
printf(" -sX Set output sampling rate.\n");
printf(" -cX Set cut-off frequency.\n");
printf(" -r Use raw data input file.\n");
printf(" file Multiple files can be given as well as wild cards.\n");
printf(" Can be any of the filetypes supported by libsndfile\n");
printf(" (http://www.zip.com.au/~erikd/libsndfile/).\n");
printf("Example:\n");
printf(" faac.exe -b96 -oc:\\aac\\ *.wav\n");
return;
}
int main(int argc, char *argv[])
{
int readNumSample;
short *sampleBuffer;
unsigned char *bitBuffer = NULL;
FILE *aacfile;
SNDFILE *sndfile;
SF_INFO sf_info;
int noSamples;
int error;
int bitBufSize;
int curBitBufSize;
int headerSize;
int i, frames, cfr;
int profile = MAIN_PROFILE;
int no_header = 0;
int use_IS = 0, use_MS = 0, use_TNS = 1, use_LTP = 1, use_PNS = 0;
int cut_off = 0;
int bit_rate = 128;
int out_rate = 0;
char out_dir[255];
int out_dir_set = 0;
int raw_audio = 0;
char *argp;
char *FileNames[200];
int FileCount = 0;
faacAACStream *as;
faacAACConfig ac;
faacVersion *faacv;
long begin, end;
int nTotSecs, nSecs;
int nMins;
faacv = NULL;
faacv = faacEncodeVersion();
printf("FAAC cl (Freeware AAC Encoder)\n");
printf("FAAC homepage: %s\n", faacv->HomePage);
printf("Encoder engine version: %d.%d\n\n",
faacv->MajorVersion, faacv->MinorVersion);
if (faacv) free(faacv);
/* Process the command line */
if (argc == 1) {
usage();
return 1;
}
for (i = 1; i < argc; i++)
{
if ((argv[i][0] != '-')&&(argv[i][0] != '/')) {
if (strchr("-/", argv[i][0]))
argp = &argv[i][1];
else argp = argv[i];
if (!strchr(argp, '*') && !strchr(argp, '?'))
{
FileNames[FileCount] = malloc((strlen(argv[i])+1)*sizeof(char));
strcpy(FileNames[FileCount], argv[i]);
FileCount++;
} else {
#ifdef WIN32
HANDLE hFindFile;
WIN32_FIND_DATA fd;
char path[255], *p;
if (NULL == (p = strrchr(argp, '\\')))
p = strrchr(argp, '/');
if (p)
{
char ch = *p;
*p = 0;
strcat(strcpy(path, argp), "\\");
*p = ch;
}
else
*path = 0;
if (INVALID_HANDLE_VALUE != (hFindFile = FindFirstFile(argp, &fd)))
{
do
{
FileNames[FileCount] = malloc((strlen(fd.cFileName)
+ strlen(path) + 2)*sizeof(char));
strcat(strcpy(FileNames[FileCount], path), fd.cFileName);
FileCount++;
} while (FindNextFile(hFindFile, &fd));
FindClose(hFindFile);
}
#else
printf("Wildcards not yet supported on systems other than WIN32\n");
#endif
}
} else {
switch(argv[i][1]) {
case 'p': case 'P':
if ((argv[i][2] == 'n') || (argv[i][2] == 'N'))
use_PNS = 1;
else if ((argv[i][2] == 'l') || (argv[i][2] == 'L'))
profile = LOW_PROFILE;
else
profile = MAIN_PROFILE;
break;
case 'n': case 'N':
if ((argv[i][2] == 'm') || (argv[i][2] == 'M'))
use_MS = -1;
else if ((argv[i][2] == 't') || (argv[i][2] == 'T'))
use_TNS = 0;
else if ((argv[i][2] == 'p') || (argv[i][2] == 'P'))
use_LTP = 0;
else
no_header = 1;
break;
case 'm': case 'M':
use_MS = 1;
break;
case 'i': case 'I':
use_IS = 1;
break;
case 'r': case 'R':
raw_audio = 1;
break;
case 'b': case 'B':
bit_rate = atoi(&argv[i][2]);
break;
case 's': case 'S':
out_rate = atoi(&argv[i][2]);
break;
case 'c': case 'C':
cut_off = atoi(&argv[i][2]);
break;
case 'o': case 'O':
out_dir_set = 1;
strcpy(out_dir, &argv[i][2]);
break;
case 'h': case 'H':
usage();
return 1;
}
}
}
if (FileCount == 0) {
return 1;
}
printf("AAC profile: %s.\n", (profile==MAIN_PROFILE)?"MAIN":"LOW");
printf("Bitrate: %dkbps.\n", bit_rate);
printf("Mid/Side (MS) stereo coding: %s.\n",
(use_MS==1)?"Full":((use_MS==0)?"Switching":"Off"));
printf("Intensity stereo (IS) coding: %s.\n", use_IS?"On":"Off");
printf("Temporal Noise Shaping: %s.\n", use_TNS?"On":"Off");
printf("Long Term Prediction: %s.\n", use_LTP?"On":"Off");
printf("Perceptual Noise Substitution: %s.\n", use_PNS?"On":"Off");
printf("ADIF header: %s.\n", no_header?"Off":"On");
if (out_dir_set)
printf("Output directory: %s.\n", out_dir);
if (out_rate)
printf("Output sampling rate: %dHz.\n", out_rate);
if (cut_off)
printf("Cut-off frequency: %dHz.\n", cut_off);
printf("\n");
for (i = 0; i < FileCount; i++) {
char aac_fn[255];
char *fnp;
printf("0%\tBusy encoding %s.\r", FileNames[i]);
#ifdef WIN32
begin = GetTickCount();
#else
begin = clock();
#endif
if (raw_audio) {
sf_info.format = SF_FORMAT_RAW;
sf_info.format |= SF_FORMAT_PCM_BE;
sf_info.channels = 2;
sf_info.pcmbitwidth = 16;
sf_info.samplerate = 44100;
}
sndfile = sf_open_read(FileNames[i], &sf_info);
if (sndfile==NULL) {
printf("Error while encoding %s.\n", FileNames[i]);
continue;
}
frames = (int)(sf_info.samples/1024+0.5);
if (out_dir_set)
combine_path(aac_fn, out_dir, FileNames[i]);
else
strcpy(aac_fn, FileNames[i]);
fnp = strrchr(aac_fn,'.');
fnp[0] = '\0';
strcat(aac_fn,".aac");
aacfile = fopen(aac_fn, "wb");
if (aacfile==NULL) {
printf("Error while encoding %s.\n", FileNames[i]);
continue;
}
ac.channels = sf_info.channels;
ac.in_sampling_rate = sf_info.samplerate;
ac.out_sampling_rate = out_rate ? out_rate : sf_info.samplerate;
ac.bit_rate = bit_rate * 1000;
ac.cut_off = cut_off ? cut_off : (ac.out_sampling_rate>>1);
ac.profile = profile;
ac.use_MS = use_MS;
ac.use_IS = use_IS;
ac.use_TNS = use_TNS;
ac.use_LTP = use_LTP;
ac.use_PNS = use_PNS;
ac.write_header = !no_header;
as = faacEncodeInit(&ac, &readNumSample, &bitBufSize, &headerSize);
if (as == NULL) {
printf("Error while encoding %s.\n", FileNames[i]);
continue;
}
sampleBuffer = malloc(readNumSample*sizeof(short));
bitBuffer = malloc((bitBufSize+100)*sizeof(char));
if (headerSize > 0) {
memset(bitBuffer, 0, headerSize*sizeof(char));
// Skip headerSize bytes
// They should be written after calling faacEncodeFree
fwrite(bitBuffer, 1, headerSize, aacfile);
}
cfr = 0;
// Keep encoding frames until the end of the audio file
do {
cfr++;
noSamples = sf_read_short(sndfile, sampleBuffer, readNumSample);
error = faacEncodeFrame(as, sampleBuffer, noSamples, bitBuffer, &curBitBufSize);
if (error == FERROR) {
printf("Error while encoding %s.\n", FileNames[i]);
break;
}
fwrite(bitBuffer, 1, curBitBufSize, aacfile);
printf("%.2f%%\tBusy encoding %s.\r", min(((double)cfr/(double)frames)*100,100),FileNames[i]);
} while (noSamples == readNumSample);
if (error == FERROR) {
continue;
}
error = faacEncodeFinish(as, bitBuffer, &curBitBufSize);
if (error == FERROR) {
printf("Error while encoding %s.\n", FileNames[i]);
continue;
}
fwrite(bitBuffer, 1, curBitBufSize, aacfile);
sf_close(sndfile);
error = faacEncodeFree(as, bitBuffer);
if (error == FERROR) {
printf("Error while encoding %s.\n", FileNames[i]);
continue;
}
// Write the header to the beginning of the file now
if (headerSize > 0) {
fseek(aacfile, 0, SEEK_SET);
fwrite(bitBuffer, 1, headerSize, aacfile);
}
fclose(aacfile);
if (bitBuffer) { free(bitBuffer); bitBuffer = NULL; }
if (sampleBuffer) { free(sampleBuffer); sampleBuffer = NULL; }
#ifdef WIN32
end = GetTickCount();
#else
end = clock();
#endif
nTotSecs = (end-begin)/1000;
nMins = nTotSecs / 60;
nSecs = nTotSecs - (60*nMins);
printf("Encoding %s took:\t%d:%.2d\t\n", FileNames[i], nMins, nSecs);
}
return FNO_ERROR;
}
#endif