shithub: aacenc

ref: a3eafe9ed6aa5c906c00c8b9586fcafae82d4e7a
dir: /libfaac/frame.h/

/*
 * FAAC - Freeware Advanced Audio Coder
 * Copyright (C) 2001 Menno Bakker
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.

 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * $Id: frame.h,v 1.12 2001/06/08 18:01:09 menno Exp $
 */

#ifndef FRAME_H
#define FRAME_H

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#include "coder.h"
#include "channels.h"
#include "psych.h"

#ifdef WIN32
  #pragma pack(push, 8)
  #ifndef FAACAPI
    #define FAACAPI __stdcall
  #endif
#else
  #ifndef FAACAPI
    #define FAACAPI
  #endif
#endif


static SR_INFO srInfo[12+1];

typedef struct faacEncConfiguration
{
    /* MPEG version, 2 or 4 */
    unsigned int mpegVersion;

    /* AAC object type */
    unsigned int aacObjectType;

    /* Allow mid/side coding */
    unsigned int allowMidside;

    /* Use one of the channels as LFE channel */
    unsigned int useLfe;

    /* Use Temporal Noise Shaping */
    unsigned int useTns;

    /* bitrate / channel of AAC file */
    unsigned long bitRate;

    /* AAC file frequency bandwidth */
    unsigned int bandWidth;

} faacEncConfiguration, *faacEncConfigurationPtr;

typedef struct {
    /* number of channels in AAC file */
    unsigned int numChannels;

    /* samplerate of AAC file */
    unsigned long sampleRate;
    unsigned int sampleRateIdx;

    unsigned int usedBytes;

    /* frame number */
    unsigned int frameNum;
    unsigned int flushFrame;

    /* Scalefactorband data */
    SR_INFO *srInfo;

    /* sample buffers of current next and next next frame*/
    double *sampleBuff[MAX_CHANNELS];
    double *nextSampleBuff[MAX_CHANNELS];
    double *next2SampleBuff[MAX_CHANNELS];
    double *ltpTimeBuff[MAX_CHANNELS];

    /* Filterbank buffers */
    double *sin_window_long;
    double *sin_window_short;
    double *kbd_window_long;
    double *kbd_window_short;
    double *freqBuff[MAX_CHANNELS];
    double *overlapBuff[MAX_CHANNELS];

    double *msSpectrum[MAX_CHANNELS];

    /* Channel and Coder data for all channels */
    CoderInfo coderInfo[MAX_CHANNELS];
    ChannelInfo channelInfo[MAX_CHANNELS];

    /* Psychoacoustics data */
    PsyInfo psyInfo[MAX_CHANNELS];
    GlobalPsyInfo gpsyInfo;

    /* Configuration data */
    faacEncConfiguration config;

} faacEncStruct, *faacEncHandle;

faacEncConfigurationPtr FAACAPI faacEncGetCurrentConfiguration(faacEncHandle hEncoder);
int FAACAPI faacEncSetConfiguration (faacEncHandle hEncoder, faacEncConfigurationPtr config);

faacEncHandle FAACAPI faacEncOpen(unsigned long sampleRate,
                                  unsigned int numChannels,
                                  unsigned long *inputSamples,
                                  unsigned long *maxOutputBytes);

int FAACAPI faacEncEncode(faacEncHandle hEncoder,
                          short *inputBuffer,
                          unsigned int samplesInput,
                          unsigned char *outputBuffer,
                          unsigned int bufferSize
                          );

int FAACAPI faacEncClose(faacEncHandle hEncoder);


#ifdef WIN32
  #pragma pack(pop)
#endif

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* FRAME_H */