main.c
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- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- /**************************************************************************************
- * Fixed-point MP3 decoder
- * Jon Recker (jrecker@real.com), Ken Cooke (kenc@real.com)
- * June 2003
- *
- * main.c - command-line test app that uses C interface to MP3 decoder
- **************************************************************************************/
- #include <stdlib.h>
- #include <string.h>
- #include <stdio.h>
- #include "mp3dec.h"
- #include "debug.h"
- #include "timing.h"
- #define READBUF_SIZE (1024*16) /* feel free to change this, but keep big enough for >= one frame at high bitrates */
- #define MAX_ARM_FRAMES 100
- #define ARMULATE_MUL_FACT 1
- static int FillReadBuffer(unsigned char *readBuf, unsigned char *readPtr, int bufSize, int bytesLeft, FILE *infile)
- {
- int nRead;
- /* move last, small chunk from end of buffer to start, then fill with new data */
- memmove(readBuf, readPtr, bytesLeft);
- nRead = fread(readBuf + bytesLeft, 1, bufSize - bytesLeft, infile);
- /* zero-pad to avoid finding false sync word after last frame (from old data in readBuf) */
- if (nRead < bufSize - bytesLeft)
- memset(readBuf + bytesLeft + nRead, 0, bufSize - bytesLeft - nRead);
- return nRead;
- }
- int main(int argc, char **argv)
- {
- int bytesLeft, nRead, err, offset, outOfData, eofReached;
- unsigned char readBuf[READBUF_SIZE], *readPtr;
- short outBuf[MAX_NCHAN * MAX_NGRAN * MAX_NSAMP];
- FILE *infile, *outfile;
- MP3FrameInfo mp3FrameInfo;
- HMP3Decoder hMP3Decoder;
- int startTime, endTime, diffTime, totalDecTime, nFrames;
- #ifdef ARM_ADS
- float audioSecs;
- #endif
- if (argc != 3) {
- printf("usage: mp3dec infile.mp3 outfile.pcmn");
- return -1;
- }
- infile = fopen(argv[1], "rb");
- if (!infile) {
- printf("file open errorn");
- return -1;
- }
-
- if (strcmp(argv[2], "nul")) {
- outfile = fopen(argv[2], "wb");
- if (!outfile) {
- printf("file open errorn");
- return -1;
- }
- } else {
- outfile = 0; /* nul output */
- }
- DebugMemCheckInit();
- InitTimer();
-
- DebugMemCheckStartPoint();
- if ( (hMP3Decoder = MP3InitDecoder()) == 0 )
- return -2;
- DebugMemCheckEndPoint();
- bytesLeft = 0;
- outOfData = 0;
- eofReached = 0;
- readPtr = readBuf;
- nRead = 0;
- totalDecTime = 0;
- nFrames = 0;
- do {
- /* somewhat arbitrary trigger to refill buffer - should always be enough for a full frame */
- if (bytesLeft < 2*MAINBUF_SIZE && !eofReached) {
- nRead = FillReadBuffer(readBuf, readPtr, READBUF_SIZE, bytesLeft, infile);
- bytesLeft += nRead;
- readPtr = readBuf;
- if (nRead == 0)
- eofReached = 1;
- }
- /* find start of next MP3 frame - assume EOF if no sync found */
- offset = MP3FindSyncWord(readPtr, bytesLeft);
- if (offset < 0) {
- outOfData = 1;
- break;
- }
- readPtr += offset;
- bytesLeft -= offset;
- /* decode one MP3 frame - if offset < 0 then bytesLeft was less than a full frame */
- startTime = ReadTimer();
- err = MP3Decode(hMP3Decoder, &readPtr, &bytesLeft, outBuf, 0);
- nFrames++;
-
- endTime = ReadTimer();
- diffTime = CalcTimeDifference(startTime, endTime);
- totalDecTime += diffTime;
- #if defined ARM_ADS && defined MAX_ARM_FRAMES
- printf("frame %5d start = %10d, end = %10d elapsed = %10d ticksr",
- nFrames, startTime, endTime, diffTime);
- fflush(stdout);
- #endif
- if (err) {
- /* error occurred */
- switch (err) {
- case ERR_MP3_INDATA_UNDERFLOW:
- outOfData = 1;
- break;
- case ERR_MP3_MAINDATA_UNDERFLOW:
- /* do nothing - next call to decode will provide more mainData */
- break;
- case ERR_MP3_FREE_BITRATE_SYNC:
- default:
- outOfData = 1;
- break;
- }
- } else {
- /* no error */
- MP3GetLastFrameInfo(hMP3Decoder, &mp3FrameInfo);
- if (outfile)
- fwrite(outBuf, mp3FrameInfo.bitsPerSample / 8, mp3FrameInfo.outputSamps, outfile);
- }
- #if defined ARM_ADS && defined MAX_ARM_FRAMES
- if (nFrames >= MAX_ARM_FRAMES)
- break;
- #endif
- } while (!outOfData);
- #ifdef ARM_ADS
- MP3GetLastFrameInfo(hMP3Decoder, &mp3FrameInfo);
- audioSecs = ((float)nFrames * mp3FrameInfo.outputSamps) / ( (float)mp3FrameInfo.samprate * mp3FrameInfo.nChans);
- printf("nTotal clock ticks = %d, MHz usage = %.2fn", totalDecTime, ARMULATE_MUL_FACT * (1.0f / audioSecs) * totalDecTime * GetClockDivFactor() / 1e6f);
- printf("nFrames = %d, output samps = %d, sampRate = %d, nChans = %dn", nFrames, mp3FrameInfo.outputSamps, mp3FrameInfo.samprate, mp3FrameInfo.nChans);
- #endif
- MP3FreeDecoder(hMP3Decoder);
- fclose(infile);
- if (outfile)
- fclose(outfile);
- FreeTimer();
- DebugMemCheckFree();
- return 0;
- }