BPI-CM9-Linux/aml-comp/multimedia/libfaad/libaacdec.c

/*
** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
** Copyright (C) 2003-2005 M. Bakker, Nero AG, http://www.nero.com
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program 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 General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
**
** Any non-GPL usage of this software or parts of this software is strictly
** forbidden.
**
** The "appropriate copyright message" mentioned in section 2c of the GPLv2
** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com"
**
** Commercial non-GPL licensing of this software is possible.
** For more info contact Nero AG through Mpeg4AAClicense@nero.com.
**
** $Id: main.c,v 1.85 2008/09/22 17:55:09 menno Exp $
**/

#ifdef WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#define off_t __int64
#else
#include <time.h>
#endif

#include "libaacdec.h"
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <sys/time.h>
#include <stdbool.h>
#ifndef WIN32
#include <android/log.h>
#endif
//#define min(a,b) ( (a) < (b) ? (a) : (b) )
#ifndef __unused
#define __unused __attribute__((unused))
#endif

/* MicroSoft channel definitions */
#define SPEAKER_FRONT_LEFT             0x1
#define SPEAKER_FRONT_RIGHT            0x2
#define SPEAKER_FRONT_CENTER           0x4
#define SPEAKER_LOW_FREQUENCY          0x8
#define SPEAKER_BACK_LEFT              0x10
#define SPEAKER_BACK_RIGHT             0x20
#define SPEAKER_FRONT_LEFT_OF_CENTER   0x40
#define SPEAKER_FRONT_RIGHT_OF_CENTER  0x80
#define SPEAKER_BACK_CENTER            0x100
#define SPEAKER_SIDE_LEFT              0x200
#define SPEAKER_SIDE_RIGHT             0x400
#define SPEAKER_TOP_CENTER             0x800
#define SPEAKER_TOP_FRONT_LEFT         0x1000
#define SPEAKER_TOP_FRONT_CENTER       0x2000
#define SPEAKER_TOP_FRONT_RIGHT        0x4000
#define SPEAKER_TOP_BACK_LEFT          0x8000
#define SPEAKER_TOP_BACK_CENTER        0x10000
#define SPEAKER_TOP_BACK_RIGHT         0x20000
#define SPEAKER_RESERVED               0x80000000

#define DefaultReadSize 1024*10 //read count from kernel audio buf one time
#define DefaultOutBufSize 1024*1024
//#define MAX_CHANNELS 6 /* make this higher to support files with more channels */

//audio decoder buffer 6144 bytes
#define AAC_INPUTBUF_SIZE   768 /* pick something big enough to hold a bunch of frames */

#define ERROR_RESET_COUNT  40
#define  RSYNC_SKIP_BYTES  1
#define FRAME_RECORD_NUM   40
#define FRAME_SIZE_MARGIN  300
#define PROPERTY_FILTER_HEAAC "vendor.media.filter.heaac"
#define PROPERTY_FAAD_DETECT_FORMAT_DISABLE "vendor.media.faad.detect.format.disable"

enum {
    AAC_ERROR_NO_ENOUGH_DATA = -1,
    AAC_ERROR_NEED_RESET_DECODER = -2,
};


typedef struct FaadContext {
    NeAACDecHandle hDecoder;
    int init_flag;
    int header_type;
    int gSampleRate;
    int gChannels;
    int decoded_nb_frames;
    int bit_rate;
    unsigned int error_count;
    unsigned int error_num; //add for get error num
    int frame_length_his[FRAME_RECORD_NUM];
    unsigned int muted_samples;
    unsigned int muted_count;
    unsigned init_cost; // summary init funciton cost bytes
    unsigned init_start_flag; //start flag to summary data cost
    int64_t starttime;
    int64_t endtime;
    bool filter_heaac;
    bool isDetectFormatDisable;//Fixme: default value as false
    int  success_count;
} FaadContext;

//typedef int (*findsyncfunc)(unsigned char *buf, int nBytes);
static const int adts_sample_rates[] = {96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350, 0, 0, 0};

static int64_t gettime(void)
{
    struct timeval tv;
    gettimeofday(&tv, NULL);
    return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
}
#if 0
static long aacChannelConfig2wavexChannelMask(NeAACDecFrameInfo *hInfo)
{
    if (hInfo->channels == 6 && hInfo->num_lfe_channels) {
        return SPEAKER_FRONT_LEFT + SPEAKER_FRONT_RIGHT +
               SPEAKER_FRONT_CENTER + SPEAKER_LOW_FREQUENCY +
               SPEAKER_BACK_LEFT + SPEAKER_BACK_RIGHT;
    } else {
        return 0;
    }
}

static char *position2string(int position)
{
    switch (position) {
    case FRONT_CHANNEL_CENTER:
        return "Center front";
    case FRONT_CHANNEL_LEFT:
        return "Left front";
    case FRONT_CHANNEL_RIGHT:
        return "Right front";
    case SIDE_CHANNEL_LEFT:
        return "Left side";
    case SIDE_CHANNEL_RIGHT:
        return "Right side";
    case BACK_CHANNEL_LEFT:
        return "Left back";
    case BACK_CHANNEL_RIGHT:
        return "Right back";
    case BACK_CHANNEL_CENTER:
        return "Center back";
    case LFE_CHANNEL:
        return "LFE";
    case UNKNOWN_CHANNEL:
        return "Unknown";
    default:
        return "";
    }

    return "";
}
#endif

#if 0
static int FindAdtsSRIndex(int sr)
{
    int i;

    for (i = 0; i < 16; i++) {
        if (sr == adts_sample_rates[i]) {
            return i;
        }
    }
    return 16 - 1;
}

static unsigned char *MakeAdtsHeader(int *dataSize, NeAACDecFrameInfo *hInfo, int old_format)
{
    unsigned char *data;
    int profile = (hInfo->object_type - 1) & 0x3;
    int sr_index = ((hInfo->sbr == SBR_UPSAMPLED) || (hInfo->sbr == NO_SBR_UPSAMPLED)) ?
                   FindAdtsSRIndex(hInfo->samplerate / 2) : FindAdtsSRIndex(hInfo->samplerate);
    int skip = (old_format) ? 8 : 7;
    int framesize = skip + hInfo->bytesconsumed;

    if (hInfo->header_type == ADTS) {
        framesize -= skip;
    }

    *dataSize = 7;

    data = malloc(*dataSize * sizeof(unsigned char));
    memset(data, 0, *dataSize * sizeof(unsigned char));

    data[0] += 0xFF; /* 8b: syncword */

    data[1] += 0xF0; /* 4b: syncword */
    /* 1b: mpeg id = 0 */
    /* 2b: layer = 0 */
    data[1] += 1; /* 1b: protection absent */

    data[2] += ((profile << 6) & 0xC0); /* 2b: profile */
    data[2] += ((sr_index << 2) & 0x3C); /* 4b: sampling_frequency_index */
    /* 1b: private = 0 */
    data[2] += ((hInfo->channels >> 2) & 0x1); /* 1b: channel_configuration */

    data[3] += ((hInfo->channels << 6) & 0xC0); /* 2b: channel_configuration */
    /* 1b: original */
    /* 1b: home */
    /* 1b: copyright_id */
    /* 1b: copyright_id_start */
    data[3] += ((framesize >> 11) & 0x3); /* 2b: aac_frame_length */

    data[4] += ((framesize >> 3) & 0xFF); /* 8b: aac_frame_length */

    data[5] += ((framesize << 5) & 0xE0); /* 3b: aac_frame_length */
    data[5] += ((0x7FF >> 6) & 0x1F); /* 5b: adts_buffer_fullness */

    data[6] += ((0x7FF << 2) & 0x3F); /* 6b: adts_buffer_fullness */
    /* 2b: num_raw_data_blocks */

    return data;
}
#endif
static unsigned get_frame_size(FaadContext *gFaadCxt)
{
    int i;
    unsigned sum = 0;
    unsigned valid_his_num = 0;
    for (i = 0; i < FRAME_RECORD_NUM; i++) {
        if (gFaadCxt->frame_length_his[i] > 0) {
            valid_his_num ++;
            sum += gFaadCxt->frame_length_his[i];
        }
    }

    if (valid_his_num == 0) {
        return 2048;
    }

    return sum / valid_his_num;
}
static void store_frame_size(FaadContext *gFaadCxt, int lastFrameLen)
{
    /* record the frame length into the history buffer */
    int i = 0;
    for (i = 0; i < FRAME_RECORD_NUM - 1; i++) {
        gFaadCxt->frame_length_his[i] = gFaadCxt->frame_length_his[i + 1];
    }
    gFaadCxt->frame_length_his[FRAME_RECORD_NUM - 1] = lastFrameLen;
}

static int AACFindADTSSyncWord(unsigned char *buf, int nBytes)
{
    int i;
    for (i = 0; i < nBytes - 1; i++) {
        if (((buf[i + 0] & 0xff) == 0xff) && ((buf[i + 1] & 0xf6) == 0xf0)) {
            break;
        }
    }
    return i;
}
//check two latm frames sync header
static int AACFindLATMSyncWord(unsigned char *buffer, int nBytes)
{
    int i;
    int i_frame_size = 0;
    for (i = 0; i < nBytes - 2; i++) {
        if (buffer[i] == 0x56 && (buffer[i + 1] & 0xe0) == 0xe0) {
            i_frame_size = ((buffer[i + 1] & 0x1f) << 8) + buffer[i + 2];
            if (i_frame_size > 4608) {
                audio_codec_print("i_frame_size  exceed  4608 ,%d \n", i_frame_size);
            }
            if (i_frame_size > 0 && i_frame_size < 4608) {
                break;
            }
        }
    }
    return i;
}
int audio_dec_init(
#ifndef WIN32
    audio_decoder_operations_t *adec_ops
#endif
)
{
    //audio_codec_print("[%s]BuildDate--%s  BuildTime--%s", __FUNCTION__, __DATE__, __TIME__);
    FaadContext *gFaadCxt = NULL;
    adec_ops->pdecoder = calloc(1, sizeof(FaadContext));
    if (!adec_ops->pdecoder) {
        audio_codec_print("malloc for decoder instance failed\n");
        return -1;
    }
    gFaadCxt = (FaadContext*)adec_ops->pdecoder;
    memset(gFaadCxt, 0, sizeof(FaadContext));
    adec_ops->nInBufSize = AAC_INPUTBUF_SIZE; //4608 bytes input buffer size
    adec_ops->nOutBufSize = 64 * 1024; //3 * adec_ops->channels * adec_ops->samplerate * 16/8; // 3s
    gFaadCxt->gChannels = adec_ops->channels;
    gFaadCxt->gSampleRate = adec_ops->samplerate;
    gFaadCxt->init_flag = 0;
    gFaadCxt->header_type = 1; //default adts
    gFaadCxt->filter_heaac = false;
    gFaadCxt->isDetectFormatDisable = false;
    gFaadCxt->success_count = 0;
    audio_codec_print("got property %s %s\n", PROPERTY_FAAD_DETECT_FORMAT_DISABLE, gFaadCxt->isDetectFormatDisable ? "true": "false");
    return 0;
}
static int audio_decoder_init(
#ifndef WIN32
    audio_decoder_operations_t *adec_ops,
#endif
    char *outbuf, int *outlen __unused, char *inbuf, int inlen, long *inbuf_consumed)
{
    unsigned long samplerate;
    unsigned char channels;
    int ret;
    NeAACDecConfigurationPtr config = NULL;
    char *in_buf;
    int  inbuf_size;
    in_buf = inbuf;
    inbuf_size = inlen;
    int nReadLen = 0;
    FaadContext *gFaadCxt  = (FaadContext*)adec_ops->pdecoder;
    int islatm = 0;

    if (!in_buf || !inbuf_size || !outbuf) {
        audio_codec_print(" input/output buffer null or input len is 0 \n");
        return -1;
    }


    {
        int latmheader_detected = 0,adtsheader_detected = 0;
        int nSeekNum = AACFindLATMSyncWord((unsigned char *)in_buf, inbuf_size);
        if (nSeekNum == (inbuf_size - 1)) {
              audio_codec_print("%d bytes data not found latm sync header \n", nSeekNum);

        } else {
            latmheader_detected = 1;
            audio_codec_print(" latm header detected nSeekNum %d \n", nSeekNum);
        }
        nSeekNum = AACFindADTSSyncWord((unsigned char *)in_buf, inbuf_size);
        if (nSeekNum == (inbuf_size - 1)) {
              audio_codec_print("%d bytes data not found adts sync header \n", nSeekNum);

        } else {
             adtsheader_detected = 1;
             audio_codec_print(" adts head detected  nSeekNum %d", nSeekNum);
        }
        if (adec_ops->nAudioDecoderType == ACODEC_FMT_AAC_LATM) {
            if (latmheader_detected && !adtsheader_detected) {
                gFaadCxt->isDetectFormatDisable = true;
            } else {
                gFaadCxt->isDetectFormatDisable = false;
            }
        }

        if (adec_ops->nAudioDecoderType == ACODEC_FMT_AAC) {
            if (latmheader_detected && !adtsheader_detected) {
                gFaadCxt->isDetectFormatDisable = true;
                adec_ops->nAudioDecoderType = ACODEC_FMT_AAC_LATM;
            }
        }

    }

retry:
    if (gFaadCxt->isDetectFormatDisable == true) {
        /*
         *fixed to LATM aac frame header sync to speed up seek speed
         *set property PROPERTY_FAAD_NOT_DETECT_FORMAT as true
         */
        if (adec_ops->nAudioDecoderType == ACODEC_FMT_AAC_LATM) {
            islatm = 1;
            int nSeekNum = AACFindLATMSyncWord((unsigned char *)in_buf, inbuf_size);
            if (nSeekNum == (inbuf_size - 2)) {
                audio_codec_print("[%s %d]%d bytes data not found latm sync header \n", __FUNCTION__,__LINE__, nSeekNum);
            } else {
                audio_codec_print("[%s %d]latm seek sync header cost %d,total %d,left %d \n", __FUNCTION__,__LINE__, nSeekNum, inbuf_size, inbuf_size - nSeekNum);
            }
            inbuf_size = inbuf_size - nSeekNum;
        }
    }

    gFaadCxt->hDecoder = NeAACDecOpen();
    gFaadCxt->error_num = 0;
    config = NeAACDecGetCurrentConfiguration(gFaadCxt->hDecoder);
    config->defObjectType = LC;
    config->outputFormat = FAAD_FMT_16BIT;
    config->downMatrix = 0x01;
    config->useOldADTSFormat = 0;
    //config->dontUpSampleImplicitSBR = 1;
    NeAACDecSetConfiguration(gFaadCxt->hDecoder, config);
    int skipbytes=RSYNC_SKIP_BYTES;
    if ((ret = NeAACDecInit(gFaadCxt->hDecoder, (unsigned char *)in_buf, inbuf_size, &samplerate, &channels, islatm,&skipbytes)) < 0) {
        in_buf += skipbytes;
        inbuf_size -= skipbytes;
        NeAACDecClose(gFaadCxt->hDecoder);
        gFaadCxt->hDecoder = NULL;
        if (inbuf_size < 0) {
            inbuf_size = 0;
        }
        audio_codec_print("init fail,inbuf_size %d \n", inbuf_size);
        //if (inbuf_size < (int)(get_frame_size(gFaadCxt) + FRAME_SIZE_MARGIN) || skipbytes == 0) {
        if (skipbytes == 0) {
            audio_codec_print("skipbytes/%d inbuf_size/%d get_frame_size()/%d ,need more data \n",skipbytes, inbuf_size, (get_frame_size(gFaadCxt) + FRAME_SIZE_MARGIN));
            *inbuf_consumed = inlen - inbuf_size;
            return AAC_ERROR_NO_ENOUGH_DATA;
        }
        goto retry;
    }
    audio_codec_print("init sucess cost %d gFaadCxt->success_count %d\n", ret, gFaadCxt->success_count);
    NeAACDecStruct* hDecoder = (NeAACDecStruct*)(gFaadCxt->hDecoder);
    if (hDecoder->adts_header_present &&
        adec_ops->nAudioDecoderType == ACODEC_FMT_AAC_LATM) {
        gFaadCxt->success_count++;
        in_buf += skipbytes;
        inbuf_size -= skipbytes;
        if (gFaadCxt->success_count < 2) {
            /* close current decoder before retry, otherwise it is leaked
               when NeAACDecOpen() overwrites gFaadCxt->hDecoder */
            NeAACDecClose(gFaadCxt->hDecoder);
            gFaadCxt->hDecoder = NULL;
            goto retry;
        }
    }
    in_buf += ret;
    inbuf_size -= ret;
    *inbuf_consumed = inlen -    inbuf_size;
    gFaadCxt->init_flag = 1;
    gFaadCxt->gChannels = channels;
    gFaadCxt->gSampleRate = samplerate;
    audio_codec_print("[%s] Init OK adif_present :%d adts_present:%d latm_present:%d,sr %lu,ch %d\n", __FUNCTION__, hDecoder->adif_header_present, hDecoder->adts_header_present, hDecoder->latm_header_present, samplerate, channels);
    return 0;
}
int audio_dec_decode(
#ifndef WIN32
    audio_decoder_operations_t *adec_ops,
#endif
    char *outbuf, int *outlen, char *inbuf, int inlen)
{
    unsigned long samplerate;
    unsigned char channels;
    void *sample_buffer;
    NeAACDecFrameInfo frameInfo = {0};
    int outmaxlen = 0;
    char *dec_buf;
    int    dec_bufsize;
    int  inbuf_consumed = 0;
    int ret = 0;
    FaadContext *gFaadCxt = (FaadContext*)adec_ops->pdecoder;
    NeAACDecStruct* hDecoder  = NULL;
    dec_bufsize = inlen;
    dec_buf = inbuf;
    outmaxlen = *outlen ;
    *outlen = 0;
    if (!outbuf || !inbuf || !inlen) {
        audio_codec_print("decoder parameter error,check \n");
        goto exit;
    }
    if (gFaadCxt->init_start_flag == 0) {
        audio_codec_print("MyFaadDecoder init first in \n");
        gFaadCxt->starttime = gettime();
        gFaadCxt->init_start_flag = 1;
    }
    if (!gFaadCxt->init_flag) {
        gFaadCxt->error_count = 0;
        gFaadCxt->decoded_nb_frames = 0;
        audio_codec_print("begin audio_decoder_init,buf size %d  \n", dec_bufsize);
        ret = audio_decoder_init(adec_ops, outbuf, outlen, dec_buf, dec_bufsize, (long *)&inbuf_consumed);
        if (ret ==  AAC_ERROR_NO_ENOUGH_DATA) {
            audio_codec_print("decoder buf size %d,cost %d byte input data ,but initiation failed.^_^ \n", inlen, inbuf_consumed);
            dec_bufsize -= inbuf_consumed;
            goto exit;
        }
        gFaadCxt->init_flag = 1;
        dec_buf += inbuf_consumed;
        dec_bufsize -= inbuf_consumed;
        gFaadCxt->init_cost += inbuf_consumed;
        gFaadCxt->endtime = gettime();
        //audio_codec_print(" MyFaadDecoder decoder init finished total cost %d bytes,consumed time %ld ms \n", gFaadCxt->init_cost, (gFaadCxt->endtime - gFaadCxt->starttime) / 1000);
        gFaadCxt->init_cost = 0;
        if (dec_bufsize < 0) {
            dec_bufsize = 0;
        }
    }
    hDecoder = (NeAACDecStruct*)(gFaadCxt->hDecoder);
    if (!hDecoder) {
        goto exit;
    }
    //TODO .fix to LATM aac decoder when ffmpeg parser return LATM aac  type
#if 0
    if (adec_ops->nAudioDecoderType == ACODEC_FMT_AAC_LATM) {
        hDecoder->latm_header_present = 1;
    }
#endif
    if (hDecoder->adts_header_present) {
        int nSeekNum = AACFindADTSSyncWord((unsigned char *)dec_buf, dec_bufsize);
        if (nSeekNum == (dec_bufsize - 1)) {
            audio_codec_print("%d bytes data not found adts sync header \n", nSeekNum);
        }
        dec_bufsize = dec_bufsize - nSeekNum;
    }
    if (hDecoder->latm_header_present) {
        int nSeekNum = AACFindLATMSyncWord((unsigned char *)dec_buf, dec_bufsize);
        if (nSeekNum == (dec_bufsize - 2)) {
            audio_codec_print("%d bytes data not found latm sync header \n", nSeekNum);
        }
        dec_bufsize = dec_bufsize - nSeekNum;
    }
    sample_buffer = NeAACDecDecode(gFaadCxt->hDecoder, &frameInfo, (unsigned char *)dec_buf, dec_bufsize);
    //audio_codec_print("dec_bufsize:%d, frameInfo.bytesconsumed:%lu, frameInfo.samples:%lu, frameInfo.error:%u", dec_bufsize, frameInfo.bytesconsumed, frameInfo.samples, frameInfo.error);
    dec_bufsize -= frameInfo.bytesconsumed;
    if (frameInfo.channels > 8) {
        audio_codec_print("[%s %d]ERR__Unvalid Nch/%d bytesconsumed/%d error/%d\n",
                           __FUNCTION__,__LINE__,frameInfo.channels,(int)frameInfo.bytesconsumed,frameInfo.error);
        sample_buffer=NULL;
    }
    if (frameInfo.error == 0 && sample_buffer == NULL && hDecoder->latm_header_present) {
        dec_bufsize -= 3;
        goto exit;
    }
    if ((frameInfo.error == 0) && (frameInfo.samples > 0) && sample_buffer != NULL) {
        gFaadCxt->decoded_nb_frames++;
        store_frame_size(gFaadCxt, frameInfo.bytesconsumed);
        gFaadCxt->gSampleRate = frameInfo.samplerate;
        gFaadCxt->gChannels = frameInfo.channels;
        //code to mute first 1 s  ???
#define  MUTE_S  0.2
        if (gFaadCxt->muted_samples == 0) {
            gFaadCxt->muted_samples  = gFaadCxt->gSampleRate * gFaadCxt->gChannels * MUTE_S;
        }
        if (gFaadCxt->muted_count  < gFaadCxt->muted_samples) {
            memset(sample_buffer, 0, 2 * frameInfo.samples);
            gFaadCxt->muted_count += frameInfo.samples;
        }
        if ((outmaxlen - (*outlen)) >= (int)(2 * frameInfo.samples)) {
            memcpy(outbuf + (*outlen), sample_buffer, 2 * frameInfo.samples);
            *outlen += 2 * frameInfo.samples;
            gFaadCxt->error_count = 0;
        } else {
            audio_codec_print("[%s %d]WARNING: no enough space used for pcm!\n", __FUNCTION__, __LINE__);
        }
    }

    if (frameInfo.error > 0) { //failed seek to the head
        if (frameInfo.error != 34 && frameInfo.error != 35) {
            //dec_bufsize -= RSYNC_SKIP_BYTES; do not need rsync skip for data had been parsed already
            //audio_codec_print("Error: %s,lslsinlen %d\n", NeAACDecGetErrorMessage(frameInfo.error), inlen);
        }
        // sr/ch changed info happened 5 times always,some times error maybe,skip bytes
        else if (frameInfo.error == 34 && gFaadCxt->error_count > 5) {
            dec_bufsize -= RSYNC_SKIP_BYTES;
            audio_codec_print("%s,,inlen %d\n", NeAACDecGetErrorMessage(frameInfo.error), inlen);
        }
        gFaadCxt->error_count++;
        gFaadCxt->error_num++;
        //err 34,means aac profile changed , PS.SBR,LC ....,normally happens when switch audio source
        if (gFaadCxt->error_count  >= ERROR_RESET_COUNT || frameInfo.error == 34) {
            if (gFaadCxt->hDecoder) {
                NeAACDecClose(gFaadCxt->hDecoder);
                gFaadCxt->hDecoder = NULL;
            }
            gFaadCxt->init_flag = 0;
            gFaadCxt->init_start_flag = 0;
        }
    }
exit:
    if (dec_bufsize < 0) {
        dec_bufsize = 0;
    }
    if (gFaadCxt->init_flag == 0) {
        gFaadCxt->init_cost += (inlen - dec_bufsize);
    }

    //disable HE-AAC decoder
    hDecoder = (NeAACDecStruct*)(gFaadCxt->hDecoder);
    if (hDecoder && hDecoder->sbr_present_flag == 1 && *outlen > 0 && gFaadCxt->filter_heaac) {
        memset(outbuf,0,*outlen);
    }
    return inlen - dec_bufsize;
}


int audio_dec_release(
#ifndef WIN32
    audio_decoder_operations_t *adec_ops
#endif
)
{
    if (adec_ops->pdecoder) {
           FaadContext *gFaadCxt = (FaadContext*)adec_ops->pdecoder;
           if (gFaadCxt->hDecoder) {
               NeAACDecClose(gFaadCxt->hDecoder);
           }
           free(adec_ops->pdecoder);
           adec_ops->pdecoder = NULL;
    }
    return 0;
}
#ifndef WIN32
int audio_dec_getinfo(audio_decoder_operations_t *adec_ops, void *pAudioInfo)
{
    FaadContext *gFaadCxt = (FaadContext*)adec_ops->pdecoder;
    if (gFaadCxt) {
        NeAACDecStruct* hDecoder = (NeAACDecStruct*)gFaadCxt->hDecoder;
        if (hDecoder)
            adec_ops->NchOriginal = hDecoder->fr_channels;
        ((AudioInfo *)pAudioInfo)->channels = gFaadCxt->gChannels;
        ((AudioInfo *)pAudioInfo)->samplerate = gFaadCxt->gSampleRate;
        ((AudioInfo *)pAudioInfo)->error_num = gFaadCxt->error_num;
        ((AudioInfo *)pAudioInfo)->drop_num = gFaadCxt->error_num;
        ((AudioInfo *)pAudioInfo)->decode_num = gFaadCxt->decoded_nb_frames;
        //audio_codec_print("--%s,gFaadCxt->error_num=%d,gFaadCxt->gSampleRate=%d--\n",__func__,gFaadCxt->error_num,gFaadCxt->gSampleRate);
    }
    return 0;
}
#endif