利用ffmpeg移植到嵌入式计算poc

利用ffmpeg移植到嵌入式计算poc

1、修改 \ffmpeg-3.2.4\libavcodec\hevc.c 下方的函数需要屏蔽一些代码

static int decode_nal_unit(HEVCContext *s, const H2645NAL *nal)
{
    HEVCLocalContext *lc = s->HEVClc;
    GetBitContext *gb    = &lc->gb;
    int ctb_addr_ts, ret;

    *gb              = nal->gb;
    s->nal_unit_type = nal->type;
    s->temporal_id   = nal->temporal_id;

    switch (s->nal_unit_type) {
    case NAL_VPS:
        ret = ff_hevc_decode_nal_vps(gb, s->avctx, &s->ps);
        if (ret < 0)
            goto fail;
        break;
    case NAL_SPS:
        ret = ff_hevc_decode_nal_sps(gb, s->avctx, &s->ps,
                                     s->apply_defdispwin);
        if (ret < 0)
            goto fail;
        break;
    case NAL_PPS:
        ret = ff_hevc_decode_nal_pps(gb, s->avctx, &s->ps);
        if (ret < 0)
            goto fail;
        break;
    case NAL_SEI_PREFIX:
    case NAL_SEI_SUFFIX:
        ret = ff_hevc_decode_nal_sei(s);
        if (ret < 0)
            goto fail;
        break;
    case NAL_TRAIL_R:
    case NAL_TRAIL_N:
    case NAL_TSA_N:
    case NAL_TSA_R:
    case NAL_STSA_N:
    case NAL_STSA_R:
    case NAL_BLA_W_LP:
    case NAL_BLA_W_RADL:
    case NAL_BLA_N_LP:
    case NAL_IDR_W_RADL:
    case NAL_IDR_N_LP:
    case NAL_CRA_NUT:
    case NAL_RADL_N:
    case NAL_RADL_R:
    case NAL_RASL_N:
    case NAL_RASL_R:
        ret = hls_slice_header(s);
        if (ret <