Function vaapi_encode_h264_init

libavcodec/vaapi_encode_h264.c:991–1052

};

static av_cold int vaapi_encode_h264_init(AVCodecContext *avctx)
{
    FFHWBaseEncodeContext *base_ctx = avctx->priv_data;
    VAAPIEncodeContext         *ctx = avctx->priv_data;
    VAAPIEncodeH264Context    *priv = avctx->priv_data;

    ctx->codec = &vaapi_encode_type_h264;

    if (avctx->profile == AV_PROFILE_UNKNOWN)
        avctx->profile = priv->profile;
    if (avctx->level == AV_LEVEL_UNKNOWN)
        avctx->level = priv->level;
    if (avctx->compression_level == FF_COMPRESSION_DEFAULT)
        avctx->compression_level = priv->quality;

    // Reject unsupported profiles.
    switch (avctx->profile) {
    case AV_PROFILE_H264_BASELINE:
        av_log(avctx, AV_LOG_WARNING, "H.264 baseline profile is not "
               "supported, using constrained baseline profile instead.\n");
        avctx->profile = AV_PROFILE_H264_CONSTRAINED_BASELINE;
        break;
    case AV_PROFILE_H264_EXTENDED:
        av_log(avctx, AV_LOG_ERROR, "H.264 extended profile "
               "is not supported.\n");
        return AVERROR_PATCHWELCOME;
    case AV_PROFILE_H264_HIGH_10_INTRA:
        av_log(avctx, AV_LOG_ERROR, "H.264 high 10 intra profile "
               "is not supported.\n");
        return AVERROR_PATCHWELCOME;
    case AV_PROFILE_H264_HIGH_422:
    case AV_PROFILE_H264_HIGH_422_INTRA:
    case AV_PROFILE_H264_HIGH_444:
    case AV_PROFILE_H264_HIGH_444_PREDICTIVE:
    case AV_PROFILE_H264_HIGH_444_INTRA:
    case AV_PROFILE_H264_CAVLC_444:
        av_log(avctx, AV_LOG_ERROR, "H.264 non-4:2:0 profiles "
               "are not supported.\n");
        return AVERROR_PATCHWELCOME;
    }

    if (avctx->level != AV_LEVEL_UNKNOWN && avctx->level & ~0xff) {
        av_log(avctx, AV_LOG_ERROR, "Invalid level %d: must fit "
               "in 8-bit unsigned integer.\n", avctx->level);
        return AVERROR(EINVAL);
    }

    ctx->desired_packed_headers =
        VA_ENC_PACKED_HEADER_SEQUENCE | // SPS and PPS.
        VA_ENC_PACKED_HEADER_SLICE    | // Slice headers.
        VA_ENC_PACKED_HEADER_MISC;      // SEI.

    base_ctx->surface_width  = FFALIGN(avctx->width,  16);
    base_ctx->surface_height = FFALIGN(avctx->height, 16);

    base_ctx->slice_block_height = base_ctx->slice_block_width = 16;

    if (priv->qp > 0)