Function vaapi_decode_make_config

libavcodec/vaapi_decode.c:478–666

* Set *va_config and the frames_ref fields from the current codec parameters * in avctx. */

 * in avctx.
 */
static int vaapi_decode_make_config(AVCodecContext *avctx,
                                    AVBufferRef *device_ref,
                                    VAConfigID *va_config,
                                    AVBufferRef *frames_ref)
{
    AVVAAPIHWConfig       *hwconfig    = NULL;
    AVHWFramesConstraints *constraints = NULL;
    VAStatus vas;
    int err, i, j;
    const AVCodecDescriptor *codec_desc;
    VAProfile *profile_list = NULL, matched_va_profile, va_profile;
    int profile_count, exact_match, matched_ff_profile, codec_profile;

    AVHWDeviceContext    *device = (AVHWDeviceContext*)device_ref->data;
    AVVAAPIDeviceContext *hwctx = device->hwctx;

    codec_desc = avcodec_descriptor_get(avctx->codec_id);
    if (!codec_desc) {
        err = AVERROR(EINVAL);
        goto fail;
    }

    profile_count = vaMaxNumProfiles(hwctx->display);
    profile_list  = av_malloc_array(profile_count,
                                    sizeof(VAProfile));
    if (!profile_list) {
        err = AVERROR(ENOMEM);
        goto fail;
    }

    vas = vaQueryConfigProfiles(hwctx->display,
                                profile_list, &profile_count);
    if (vas != VA_STATUS_SUCCESS) {
        av_log(avctx, AV_LOG_ERROR, "Failed to query profiles: "
               "%d (%s).\n", vas, vaErrorStr(vas));
        err = AVERROR(ENOSYS);
        goto fail;
    }

    matched_va_profile = VAProfileNone;
    exact_match = 0;

    for (i = 0; i < FF_ARRAY_ELEMS(vaapi_profile_map); i++) {
        int profile_match = 0;
        if (avctx->codec_id != vaapi_profile_map[i].codec_id)
            continue;
        if (avctx->profile == vaapi_profile_map[i].codec_profile ||
            vaapi_profile_map[i].codec_profile == AV_PROFILE_UNKNOWN)
            profile_match = 1;

        va_profile = vaapi_profile_map[i].profile_parser ?
                     vaapi_profile_map[i].profile_parser(avctx) :
                     vaapi_profile_map[i].va_profile;
        codec_profile = vaapi_profile_map[i].codec_profile;

        for (j = 0; j < profile_count; j++) {
            if (va_profile == profile_list[j]) {
                exact_match = profile_match;