C++ (Cpp) idct_put 예제들

예제 #1

파일: asvdec.c 프로젝트: DonDiego/libav

static int decode_frame(AVCodecContext *avctx,
                        void *data, int *got_frame,
                        AVPacket *avpkt)
{
    ASV1Context * const a = avctx->priv_data;
    const uint8_t *buf    = avpkt->data;
    int buf_size          = avpkt->size;
    AVFrame * const p     = data;
    int mb_x, mb_y, ret;

    if ((ret = ff_get_buffer(avctx, p, 0)) < 0) {
        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
        return ret;
    }
    p->pict_type = AV_PICTURE_TYPE_I;
    p->key_frame = 1;

    av_fast_padded_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size,
                          buf_size);
    if (!a->bitstream_buffer)
        return AVERROR(ENOMEM);

    if (avctx->codec_id == AV_CODEC_ID_ASV1)
        a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (const uint32_t*)buf, buf_size/4);
    else {
        int i;
        for (i = 0; i < buf_size; i++)
            a->bitstream_buffer[i] = ff_reverse[buf[i]];
    }

    init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);

    for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
        for (mb_x = 0; mb_x < a->mb_width2; mb_x++) {
            if ((ret = decode_mb(a, a->block)) < 0)
                return ret;

            idct_put(a, p, mb_x, mb_y);
        }
    }

    if (a->mb_width2 != a->mb_width) {
        mb_x = a->mb_width2;
        for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
            if ((ret = decode_mb(a, a->block)) < 0)
                return ret;

            idct_put(a, p, mb_x, mb_y);
        }
    }

    if (a->mb_height2 != a->mb_height) {
        mb_y = a->mb_height2;
        for (mb_x = 0; mb_x < a->mb_width; mb_x++) {
            if ((ret = decode_mb(a, a->block)) < 0)
                return ret;

            idct_put(a, p, mb_x, mb_y);
        }
    }

    *got_frame = 1;

    emms_c();

    return (get_bits_count(&a->gb) + 31) / 32 * 4;
}

예제 #2

파일: asv1.c 프로젝트: pcercuei/dcplaya

static int decode_frame(AVCodecContext *avctx, 
                        void *data, int *data_size,
                        uint8_t *buf, int buf_size)
{
    ASV1Context * const a = avctx->priv_data;
    AVFrame *picture = data;
    AVFrame * const p= (AVFrame*)&a->picture;
    int mb_x, mb_y;

    /* special case for last picture */
    if (buf_size == 0) {
        return 0;
    }

    if(p->data[0])
        avctx->release_buffer(avctx, p);

    p->reference= 0;
    if(avctx->get_buffer(avctx, p) < 0){
        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
        return -1;
    }
    p->pict_type= I_TYPE;
    p->key_frame= 1;

    a->bitstream_buffer= av_fast_realloc(a->bitstream_buffer, &a->bitstream_buffer_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
    
    if(avctx->codec_id == CODEC_ID_ASV1)
        a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (uint32_t*)buf, buf_size/4);
    else{
        int i;
        for(i=0; i<buf_size; i++)
            a->bitstream_buffer[i]= reverse[ buf[i] ];
    }

    init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);

    for(mb_y=0; mb_y<a->mb_height2; mb_y++){
        for(mb_x=0; mb_x<a->mb_width2; mb_x++){
            if( decode_mb(a, a->block) <0)
                return -1;
             
            idct_put(a, mb_x, mb_y);
        }
    }

    if(a->mb_width2 != a->mb_width){
        mb_x= a->mb_width2;
        for(mb_y=0; mb_y<a->mb_height2; mb_y++){
            if( decode_mb(a, a->block) <0)
                return -1;
             
            idct_put(a, mb_x, mb_y);
        }
    }

    if(a->mb_height2 != a->mb_height){
        mb_y= a->mb_height2;
        for(mb_x=0; mb_x<a->mb_width; mb_x++){
            if( decode_mb(a, a->block) <0)
                return -1;
             
            idct_put(a, mb_x, mb_y);
        }
    }
#if 0    
int i;
printf("%d %d\n", 8*buf_size, get_bits_count(&a->gb));
for(i=get_bits_count(&a->gb); i<8*buf_size; i++){
    printf("%d", get_bits1(&a->gb));
}

for(i=0; i<s->avctx->extradata_size; i++){
    printf("%c\n", ((uint8_t*)s->avctx->extradata)[i]);
}
#endif

    *picture= *(AVFrame*)&a->picture;
    *data_size = sizeof(AVPicture);

    emms_c();
    
    return (get_bits_count(&a->gb)+31)/32*4;
}