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512 lines
16 KiB
512 lines
16 KiB
/*
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** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
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** Copyright (C) 2003-2005 M. Bakker, Nero AG, http://www.nero.com
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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**
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** Any non-GPL usage of this software or parts of this software is strictly
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** forbidden.
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**
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** The "appropriate copyright message" mentioned in section 2c of the GPLv2
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** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com"
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**
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** Commercial non-GPL licensing of this software is possible.
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** For more info contact Nero AG through Mpeg4AAClicense@nero.com.
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**
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** $Id: audio.c,v 1.30 2015/01/22 09:40:52 knik Exp $
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**/
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#ifdef _WIN32
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#include <io.h>
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <math.h>
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#include <neaacdec.h>
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#include <stdint.h>
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#include "unicode_support.h"
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#include "audio.h"
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static size_t write_wav_header(audio_file *aufile);
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static size_t write_wav_extensible_header(audio_file *aufile, long channelMask);
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static size_t write_audio_16bit(audio_file *aufile, void *sample_buffer,
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unsigned int samples);
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static size_t write_audio_24bit(audio_file *aufile, void *sample_buffer,
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unsigned int samples);
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static size_t write_audio_32bit(audio_file *aufile, void *sample_buffer,
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unsigned int samples);
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static size_t write_audio_float(audio_file *aufile, void *sample_buffer,
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unsigned int samples);
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audio_file *open_audio_file(char *infile, int samplerate, int channels,
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int outputFormat, int fileType, long channelMask)
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{
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audio_file *aufile = malloc(sizeof(audio_file));
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aufile->outputFormat = outputFormat;
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aufile->samplerate = samplerate;
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aufile->channels = channels;
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aufile->total_samples = 0;
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aufile->fileType = fileType;
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aufile->channelMask = channelMask;
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switch (outputFormat)
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{
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case FAAD_FMT_16BIT:
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aufile->bits_per_sample = 16;
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break;
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case FAAD_FMT_24BIT:
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aufile->bits_per_sample = 24;
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break;
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case FAAD_FMT_32BIT:
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case FAAD_FMT_FLOAT:
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aufile->bits_per_sample = 32;
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break;
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default:
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if (aufile) free(aufile);
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return NULL;
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}
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if(infile[0] == '-')
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{
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#ifdef _WIN32
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_setmode(_fileno(stdout), O_BINARY);
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#endif
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aufile->sndfile = stdout;
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aufile->toStdio = 1;
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} else {
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aufile->toStdio = 0;
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aufile->sndfile = faad_fopen(infile, "wb");
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}
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if (aufile->sndfile == NULL)
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{
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if (aufile) free(aufile);
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return NULL;
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}
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if (aufile->fileType == OUTPUT_WAV)
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{
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if (aufile->channelMask)
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write_wav_extensible_header(aufile, aufile->channelMask);
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else
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write_wav_header(aufile);
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}
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return aufile;
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}
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size_t write_audio_file(audio_file *aufile, void *sample_buffer, int samples)
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{
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char *buf = (char *)sample_buffer;
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switch (aufile->outputFormat)
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{
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case FAAD_FMT_16BIT:
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return write_audio_16bit(aufile, buf, samples);
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case FAAD_FMT_24BIT:
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return write_audio_24bit(aufile, buf, samples);
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case FAAD_FMT_32BIT:
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return write_audio_32bit(aufile, buf, samples);
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case FAAD_FMT_FLOAT:
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return write_audio_float(aufile, buf, samples);
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default:
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return 0;
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}
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// return 0;
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}
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void close_audio_file(audio_file *aufile)
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{
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if ((aufile->fileType == OUTPUT_WAV) && (aufile->toStdio == 0))
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{
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fseek(aufile->sndfile, 0, SEEK_SET);
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if (aufile->channelMask)
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write_wav_extensible_header(aufile, aufile->channelMask);
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else
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write_wav_header(aufile);
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}
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if (aufile->toStdio == 0)
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fclose(aufile->sndfile);
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if (aufile) free(aufile);
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}
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static size_t write_wav_header(audio_file *aufile)
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{
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unsigned char header[44];
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unsigned char* p = header;
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unsigned int bytes = (aufile->bits_per_sample + 7) / 8;
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float data_size = (float)bytes * aufile->total_samples;
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unsigned long word32;
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*p++ = 'R'; *p++ = 'I'; *p++ = 'F'; *p++ = 'F';
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word32 = (data_size + (44 - 8) < (float)MAXWAVESIZE) ?
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(unsigned long)data_size + (44 - 8) : (unsigned long)MAXWAVESIZE;
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*p++ = (unsigned char)(word32 >> 0);
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*p++ = (unsigned char)(word32 >> 8);
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*p++ = (unsigned char)(word32 >> 16);
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*p++ = (unsigned char)(word32 >> 24);
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*p++ = 'W'; *p++ = 'A'; *p++ = 'V'; *p++ = 'E';
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*p++ = 'f'; *p++ = 'm'; *p++ = 't'; *p++ = ' ';
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*p++ = 0x10; *p++ = 0x00; *p++ = 0x00; *p++ = 0x00;
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if (aufile->outputFormat == FAAD_FMT_FLOAT)
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{
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*p++ = 0x03; *p++ = 0x00;
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} else {
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*p++ = 0x01; *p++ = 0x00;
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}
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*p++ = (unsigned char)(aufile->channels >> 0);
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*p++ = (unsigned char)(aufile->channels >> 8);
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word32 = (unsigned long)(aufile->samplerate + 0.5);
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*p++ = (unsigned char)(word32 >> 0);
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*p++ = (unsigned char)(word32 >> 8);
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*p++ = (unsigned char)(word32 >> 16);
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*p++ = (unsigned char)(word32 >> 24);
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word32 = aufile->samplerate * bytes * aufile->channels;
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*p++ = (unsigned char)(word32 >> 0);
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*p++ = (unsigned char)(word32 >> 8);
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*p++ = (unsigned char)(word32 >> 16);
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*p++ = (unsigned char)(word32 >> 24);
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word32 = bytes * aufile->channels;
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*p++ = (unsigned char)(word32 >> 0);
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*p++ = (unsigned char)(word32 >> 8);
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*p++ = (unsigned char)(aufile->bits_per_sample >> 0);
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*p++ = (unsigned char)(aufile->bits_per_sample >> 8);
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*p++ = 'd'; *p++ = 'a'; *p++ = 't'; *p++ = 'a';
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word32 = data_size < MAXWAVESIZE ?
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(unsigned long)data_size : (unsigned long)MAXWAVESIZE;
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*p++ = (unsigned char)(word32 >> 0);
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*p++ = (unsigned char)(word32 >> 8);
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*p++ = (unsigned char)(word32 >> 16);
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*p++ = (unsigned char)(word32 >> 24);
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return fwrite(header, sizeof(header), 1, aufile->sndfile);
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}
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static size_t write_wav_extensible_header(audio_file *aufile, long channelMask)
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{
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unsigned char header[68];
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unsigned char* p = header;
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unsigned int bytes = (aufile->bits_per_sample + 7) / 8;
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float data_size = (float)bytes * aufile->total_samples;
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unsigned long word32;
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*p++ = 'R'; *p++ = 'I'; *p++ = 'F'; *p++ = 'F';
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word32 = (data_size + (68 - 8) < (float)MAXWAVESIZE) ?
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(unsigned long)data_size + (68 - 8) : (unsigned long)MAXWAVESIZE;
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*p++ = (unsigned char)(word32 >> 0);
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*p++ = (unsigned char)(word32 >> 8);
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*p++ = (unsigned char)(word32 >> 16);
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*p++ = (unsigned char)(word32 >> 24);
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*p++ = 'W'; *p++ = 'A'; *p++ = 'V'; *p++ = 'E';
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*p++ = 'f'; *p++ = 'm'; *p++ = 't'; *p++ = ' ';
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*p++ = /*0x10*/0x28; *p++ = 0x00; *p++ = 0x00; *p++ = 0x00;
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/* WAVE_FORMAT_EXTENSIBLE */
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*p++ = 0xFE; *p++ = 0xFF;
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*p++ = (unsigned char)(aufile->channels >> 0);
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*p++ = (unsigned char)(aufile->channels >> 8);
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word32 = (unsigned long)(aufile->samplerate + 0.5);
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*p++ = (unsigned char)(word32 >> 0);
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*p++ = (unsigned char)(word32 >> 8);
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*p++ = (unsigned char)(word32 >> 16);
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*p++ = (unsigned char)(word32 >> 24);
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word32 = aufile->samplerate * bytes * aufile->channels;
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*p++ = (unsigned char)(word32 >> 0);
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*p++ = (unsigned char)(word32 >> 8);
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*p++ = (unsigned char)(word32 >> 16);
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*p++ = (unsigned char)(word32 >> 24);
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word32 = bytes * aufile->channels;
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*p++ = (unsigned char)(word32 >> 0);
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*p++ = (unsigned char)(word32 >> 8);
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*p++ = (unsigned char)(aufile->bits_per_sample >> 0);
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*p++ = (unsigned char)(aufile->bits_per_sample >> 8);
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/* cbSize */
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*p++ = (unsigned char)(22);
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*p++ = (unsigned char)(0);
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/* WAVEFORMATEXTENSIBLE */
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/* wValidBitsPerSample */
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*p++ = (unsigned char)(aufile->bits_per_sample >> 0);
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*p++ = (unsigned char)(aufile->bits_per_sample >> 8);
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/* dwChannelMask */
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word32 = channelMask;
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*p++ = (unsigned char)(word32 >> 0);
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*p++ = (unsigned char)(word32 >> 8);
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*p++ = (unsigned char)(word32 >> 16);
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*p++ = (unsigned char)(word32 >> 24);
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/* SubFormat */
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if (aufile->outputFormat == FAAD_FMT_FLOAT)
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{
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/* KSDATAFORMAT_SUBTYPE_IEEE_FLOAT: 00000003-0000-0010-8000-00aa00389b71 */
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*p++ = 0x03;
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*p++ = 0x00;
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*p++ = 0x00;
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*p++ = 0x00;
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*p++ = 0x00; *p++ = 0x00; *p++ = 0x10; *p++ = 0x00; *p++ = 0x80; *p++ = 0x00;
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*p++ = 0x00; *p++ = 0xaa; *p++ = 0x00; *p++ = 0x38; *p++ = 0x9b; *p++ = 0x71;
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} else {
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/* KSDATAFORMAT_SUBTYPE_PCM: 00000001-0000-0010-8000-00aa00389b71 */
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*p++ = 0x01;
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*p++ = 0x00;
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*p++ = 0x00;
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*p++ = 0x00;
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*p++ = 0x00; *p++ = 0x00; *p++ = 0x10; *p++ = 0x00; *p++ = 0x80; *p++ = 0x00;
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*p++ = 0x00; *p++ = 0xaa; *p++ = 0x00; *p++ = 0x38; *p++ = 0x9b; *p++ = 0x71;
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}
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/* end WAVEFORMATEXTENSIBLE */
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*p++ = 'd'; *p++ = 'a'; *p++ = 't'; *p++ = 'a';
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word32 = data_size < MAXWAVESIZE ?
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(unsigned long)data_size : (unsigned long)MAXWAVESIZE;
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*p++ = (unsigned char)(word32 >> 0);
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*p++ = (unsigned char)(word32 >> 8);
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*p++ = (unsigned char)(word32 >> 16);
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*p++ = (unsigned char)(word32 >> 24);
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return fwrite(header, sizeof(header), 1, aufile->sndfile);
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}
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static size_t write_audio_16bit(audio_file *aufile, void *sample_buffer,
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unsigned int samples)
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{
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size_t ret;
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unsigned int i;
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short *sample_buffer16 = (short*)sample_buffer;
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char *data = malloc(samples*aufile->bits_per_sample*sizeof(char)/8);
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aufile->total_samples += samples;
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if (aufile->channels == 6 && aufile->channelMask)
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{
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for (i = 0; i < samples; i += aufile->channels)
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{
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short r1, r2, r3, r4, r5, r6;
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r1 = sample_buffer16[i];
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r2 = sample_buffer16[i+1];
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r3 = sample_buffer16[i+2];
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r4 = sample_buffer16[i+3];
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r5 = sample_buffer16[i+4];
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r6 = sample_buffer16[i+5];
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sample_buffer16[i] = r2;
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sample_buffer16[i+1] = r3;
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sample_buffer16[i+2] = r1;
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sample_buffer16[i+3] = r6;
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sample_buffer16[i+4] = r4;
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sample_buffer16[i+5] = r5;
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}
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}
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for (i = 0; i < samples; i++)
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{
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data[i*2] = (char)(sample_buffer16[i] & 0xFF);
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data[i*2+1] = (char)((sample_buffer16[i] >> 8) & 0xFF);
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}
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ret = fwrite(data, samples, aufile->bits_per_sample/8, aufile->sndfile);
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if (data) free(data);
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return ret;
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}
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static size_t write_audio_24bit(audio_file *aufile, void *sample_buffer,
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unsigned int samples)
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{
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size_t ret;
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unsigned int i;
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int32_t *sample_buffer24 = (int32_t*)sample_buffer;
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char *data = malloc(samples*aufile->bits_per_sample*sizeof(char)/8);
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aufile->total_samples += samples;
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if (aufile->channels == 6 && aufile->channelMask)
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{
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for (i = 0; i < samples; i += aufile->channels)
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{
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long r1, r2, r3, r4, r5, r6;
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r1 = sample_buffer24[i];
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r2 = sample_buffer24[i+1];
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r3 = sample_buffer24[i+2];
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r4 = sample_buffer24[i+3];
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r5 = sample_buffer24[i+4];
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r6 = sample_buffer24[i+5];
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sample_buffer24[i] = r2;
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sample_buffer24[i+1] = r3;
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sample_buffer24[i+2] = r1;
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sample_buffer24[i+3] = r6;
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sample_buffer24[i+4] = r4;
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sample_buffer24[i+5] = r5;
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}
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}
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for (i = 0; i < samples; i++)
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{
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data[i*3] = (char)(sample_buffer24[i] & 0xFF);
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data[i*3+1] = (char)((sample_buffer24[i] >> 8) & 0xFF);
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data[i*3+2] = (char)((sample_buffer24[i] >> 16) & 0xFF);
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}
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ret = fwrite(data, samples, aufile->bits_per_sample/8, aufile->sndfile);
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if (data) free(data);
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return ret;
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}
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static size_t write_audio_32bit(audio_file *aufile, void *sample_buffer,
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unsigned int samples)
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{
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size_t ret;
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unsigned int i;
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int32_t *sample_buffer32 = (int32_t*)sample_buffer;
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char *data = malloc(samples*aufile->bits_per_sample*sizeof(char)/8);
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aufile->total_samples += samples;
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if (aufile->channels == 6 && aufile->channelMask)
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{
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for (i = 0; i < samples; i += aufile->channels)
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{
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long r1, r2, r3, r4, r5, r6;
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r1 = sample_buffer32[i];
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r2 = sample_buffer32[i+1];
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r3 = sample_buffer32[i+2];
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r4 = sample_buffer32[i+3];
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r5 = sample_buffer32[i+4];
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r6 = sample_buffer32[i+5];
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sample_buffer32[i] = r2;
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sample_buffer32[i+1] = r3;
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sample_buffer32[i+2] = r1;
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sample_buffer32[i+3] = r6;
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sample_buffer32[i+4] = r4;
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sample_buffer32[i+5] = r5;
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}
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}
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for (i = 0; i < samples; i++)
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{
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data[i*4] = (char)(sample_buffer32[i] & 0xFF);
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data[i*4+1] = (char)((sample_buffer32[i] >> 8) & 0xFF);
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data[i*4+2] = (char)((sample_buffer32[i] >> 16) & 0xFF);
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data[i*4+3] = (char)((sample_buffer32[i] >> 24) & 0xFF);
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}
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ret = fwrite(data, samples, aufile->bits_per_sample/8, aufile->sndfile);
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if (data) free(data);
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return ret;
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}
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static size_t write_audio_float(audio_file *aufile, void *sample_buffer,
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unsigned int samples)
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{
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size_t ret;
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unsigned int i;
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float *sample_buffer_f = (float*)sample_buffer;
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unsigned char *data = malloc(samples*aufile->bits_per_sample*sizeof(char)/8);
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aufile->total_samples += samples;
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if (aufile->channels == 6 && aufile->channelMask)
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{
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for (i = 0; i < samples; i += aufile->channels)
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{
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float r1, r2, r3, r4, r5, r6;
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r1 = sample_buffer_f[i];
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r2 = sample_buffer_f[i+1];
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r3 = sample_buffer_f[i+2];
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r4 = sample_buffer_f[i+3];
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r5 = sample_buffer_f[i+4];
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r6 = sample_buffer_f[i+5];
|
|
sample_buffer_f[i] = r2;
|
|
sample_buffer_f[i+1] = r3;
|
|
sample_buffer_f[i+2] = r1;
|
|
sample_buffer_f[i+3] = r6;
|
|
sample_buffer_f[i+4] = r4;
|
|
sample_buffer_f[i+5] = r5;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < samples; i++)
|
|
{
|
|
int exponent, mantissa, negative = 0 ;
|
|
float in = sample_buffer_f[i];
|
|
|
|
data[i*4] = 0; data[i*4+1] = 0; data[i*4+2] = 0; data[i*4+3] = 0;
|
|
if (in == 0.0)
|
|
continue;
|
|
|
|
if (in < 0.0)
|
|
{
|
|
in *= -1.0;
|
|
negative = 1;
|
|
}
|
|
in = (float)frexp(in, &exponent);
|
|
exponent += 126;
|
|
in *= (float)0x1000000;
|
|
mantissa = (((int)in) & 0x7FFFFF);
|
|
|
|
if (negative)
|
|
data[i*4+3] |= 0x80;
|
|
|
|
if (exponent & 0x01)
|
|
data[i*4+2] |= 0x80;
|
|
|
|
data[i*4] = mantissa & 0xFF;
|
|
data[i*4+1] = (mantissa >> 8) & 0xFF;
|
|
data[i*4+2] |= (mantissa >> 16) & 0x7F;
|
|
data[i*4+3] |= (exponent >> 1) & 0x7F;
|
|
}
|
|
|
|
ret = fwrite(data, samples, aufile->bits_per_sample/8, aufile->sndfile);
|
|
|
|
if (data) free(data);
|
|
|
|
return ret;
|
|
}
|
|
|