amr.c

arm平台下的H264编码和解码源代码

}


#else /* Float point version*/

typedef struct AMRContext {
    int frameCount;
    void * decState;
    int *enstate;
    enum Mode enc_bitrate;
} AMRContext;

static int amr_nb_decode_init(AVCodecContext * avctx)
{
    AMRContext *s = avctx->priv_data;
    s->frameCount=0;
    s->decState=Decoder_Interface_init();
    if(!s->decState)
    {
        av_log(avctx, AV_LOG_ERROR, "Decoder_Interface_init error\r\n");
        return -1;
    }
    return 0;
}

static int amr_nb_encode_init(AVCodecContext * avctx)
{
    AMRContext *s = avctx->priv_data;
    s->frameCount=0;
    
    if(avctx->sample_rate!=8000)
    {
        if(avctx->debug)
        {
            av_log(avctx, AV_LOG_DEBUG, "Only 8000Hz sample rate supported\n");
        }
        return -1;
    }

    if(avctx->channels!=1)
    {
        if(avctx->debug)
        {
            av_log(avctx, AV_LOG_DEBUG, "Only mono supported\n");
        }
        return -1;
    }

    avctx->frame_size=160;
    avctx->coded_frame= avcodec_alloc_frame();

    s->enstate=Encoder_Interface_init(0);
    if(!s->enstate)
    {
        if(avctx->debug)
        {
            av_log(avctx, AV_LOG_DEBUG, "Encoder_Interface_init error\n");
        }
        return -1;
    }

    s->enc_bitrate=getBitrateMode(avctx->bit_rate);

    return 0;
}

static int amr_nb_decode_close(AVCodecContext * avctx)
{
    AMRContext *s = avctx->priv_data;
    Decoder_Interface_exit(s->decState);
    return 0;
}

static int amr_nb_encode_close(AVCodecContext * avctx)
{
    AMRContext *s = avctx->priv_data;
    Encoder_Interface_exit(s->enstate);
    av_freep(&avctx->coded_frame);
    return 0;
}

static int amr_nb_decode_frame(AVCodecContext * avctx,
            void *data, int *data_size,
            uint8_t * buf, int buf_size)
{
    AMRContext *s = (AMRContext*)avctx->priv_data;

    uint8_t*amrData=buf;
    int offset=0;
    static short block_size[16]={ 12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0 };
    enum Mode dec_mode;
    int packet_size;
    *data_size=0;

    //printf("amr_decode_frame data_size=%i buf=0x%X buf_size=%d frameCount=%d!!\n",*data_size,buf,buf_size,s->frameCount);

    while(offset<buf_size)
    {
    	dec_mode = (amrData[offset] >> 3) & 0x000F;
    	packet_size = block_size[dec_mode];
    
        s->frameCount++;
        //printf("offset=%d, packet_size=%d amrData= 0x%X %X %X %X\n",offset,packet_size,amrData[offset],amrData[offset+1],amrData[offset+2],amrData[offset+3]);
    	/* call decoder */
    	Decoder_Interface_Decode(s->decState, &amrData[offset], data+*data_size, 0);
    	*data_size+=160*2;
   
        offset+=packet_size+1; 
    }
    return buf_size;
}

static int amr_nb_encode_frame(AVCodecContext *avctx,
			    unsigned char *frame/*out*/, int buf_size, void *data/*in*/)
{
    AMRContext *s = (AMRContext*)avctx->priv_data;
    int written;

    written = Encoder_Interface_Encode(s->enstate, 
        s->enc_bitrate, 
        data, 
        frame, 
        0);

    return written;
}

#endif

AVCodec amr_nb_decoder =
{
    "amr_nb",
    CODEC_TYPE_AUDIO,
    CODEC_ID_AMR_NB,
    sizeof(AMRContext),
    amr_nb_decode_init,
    NULL,
    amr_nb_decode_close,
    amr_nb_decode_frame,
};

AVCodec amr_nb_encoder =
{
    "amr_nb",
    CODEC_TYPE_AUDIO,
    CODEC_ID_AMR_NB,
    sizeof(AMRContext),
    amr_nb_encode_init,
    amr_nb_encode_frame,
    amr_nb_encode_close,
    NULL,
};

/* -----------AMR wideband ------------*/
#ifdef AMR_WB

#ifdef _TYPEDEF_H
//To avoid duplicate typedefs from typdef in amr-nb
#define typedef_h
#endif

#include "amrwb_float/enc_if.h"
#include "amrwb_float/dec_if.h"

/* Common code for fixed and float version*/
typedef struct AMRWB_bitrates
{
    int startrate;
    int stoprate;
    int mode;
    
} AMRWB_bitrates;

static int getWBBitrateMode(int bitrate)
{
    /* Adjusted so that all bitrates can be used from commandline where
       only a multiple of 1000 can be specified*/
    AMRWB_bitrates rates[]={ {0,7999,0}, //6.6kHz
                           {8000,9999,1},//8.85
                           {10000,13000,2},//12.65
                           {13001,14999,3},//14.25
                           {15000,17000,4},//15.85
                           {17001,18000,5},//18.25
                           {18001,22000,6},//19.85
                           {22001,23000,7},//23.05
                           {23001,24000,8},//23.85
                           
                         };
    int i;

    for(i=0;i<9;i++)
    {
        if(rates[i].startrate<=bitrate && rates[i].stoprate>=bitrate)
        {
            return(rates[i].mode);
        }
    }
    /*Return highest possible*/
    return(8);
}


typedef struct AMRWBContext {
    int frameCount;
    void *state;
    int mode;
    Word16 allow_dtx;
} AMRWBContext;

static int amr_wb_encode_init(AVCodecContext * avctx)
{
    AMRWBContext *s = (AMRWBContext*)avctx->priv_data;
    s->frameCount=0;
    
    if(avctx->sample_rate!=16000)
    {
        if(avctx->debug)
        {
            av_log(avctx, AV_LOG_DEBUG, "Only 16000Hz sample rate supported\n");
        }
        return -1;
    }

    if(avctx->channels!=1)
    {
        if(avctx->debug)
        {
            av_log(avctx, AV_LOG_DEBUG, "Only mono supported\n");
        }
        return -1;
    }

    avctx->frame_size=320;
    avctx->coded_frame= avcodec_alloc_frame();

    s->state = E_IF_init();
    s->mode=getWBBitrateMode(avctx->bit_rate);
    s->allow_dtx=0;

    return 0;
}

static int amr_wb_encode_close(AVCodecContext * avctx)
{
    AMRWBContext *s = (AMRWBContext*) avctx->priv_data;
    E_IF_exit(s->state);
    av_freep(&avctx->coded_frame);
    s->frameCount++;
    return 0;
}

static int amr_wb_encode_frame(AVCodecContext *avctx,
			    unsigned char *frame/*out*/, int buf_size, void *data/*in*/)
{
    AMRWBContext *s = (AMRWBContext*) avctx->priv_data;
    int size = E_IF_encode(s->state, s->mode, data, frame, s->allow_dtx);
    return size;
}

static int amr_wb_decode_init(AVCodecContext * avctx)
{
    AMRWBContext *s = (AMRWBContext *)avctx->priv_data;
    s->frameCount=0;
    s->state = D_IF_init();
    return 0;
}

extern const UWord8 block_size[];

static int amr_wb_decode_frame(AVCodecContext * avctx,
            void *data, int *data_size,
            uint8_t * buf, int buf_size)
{
    AMRWBContext *s = (AMRWBContext*)avctx->priv_data;

    uint8_t*amrData=buf;
    int offset=0;
    int mode;
    int packet_size;
    *data_size=0;

    while(offset<buf_size)
    {
        s->frameCount++;
        mode = (Word16)((amrData[offset] >> 3) & 0x0F);
        packet_size = block_size[mode];
        D_IF_decode( s->state, &amrData[offset], data+*data_size, _good_frame);
    	*data_size+=320*2;
        offset+=packet_size; 
    }
    return buf_size;
}

static int amr_wb_decode_close(AVCodecContext * avctx)
{
    AMRWBContext *s = (AMRWBContext *)avctx->priv_data;
    D_IF_exit(s->state);
    return 0;
}

AVCodec amr_wb_decoder =
{
    "amr_wb",
    CODEC_TYPE_AUDIO,
    CODEC_ID_AMR_WB,
    sizeof(AMRWBContext),
    amr_wb_decode_init,
    NULL,
    amr_wb_decode_close,
    amr_wb_decode_frame,
};

AVCodec amr_wb_encoder =
{
    "amr_wb",
    CODEC_TYPE_AUDIO,
    CODEC_ID_AMR_WB,
    sizeof(AMRWBContext),
    amr_wb_encode_init,
    amr_wb_encode_frame,
    amr_wb_encode_close,
    NULL,
};

#endif //AMR_WB