Method createVideoFormatDesc

framework/codec/Apple/AppleVideoToolBox.cpp:263–345

    }

    int AFVTBDecoder::createVideoFormatDesc(const uint8_t *pData, int size, int width, int height, CFDictionaryRef &decoder_spec,
                                            CMFormatDescriptionRef &cm_fmt_desc)
    {
        OSStatus status;
        int ret;

        if (pData == nullptr || size == 0) {
            return -EINVAL;
        }

        CFMutableDictionaryRef par =
                CFDictionaryCreateMutable(nullptr, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
        CFMutableDictionaryRef atoms =
                CFDictionaryCreateMutable(nullptr, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
        CFMutableDictionaryRef extensions =
                CFDictionaryCreateMutable(nullptr, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
        /* CVPixelAspectRatio dict */
        Stream_meta *meta = ((Stream_meta *) (*(mPInMeta)));


        float HSpacing = 1.0;
        float VSpacing = 1.0;

        if (meta->displayHeight && meta->displayWidth) {
            VSpacing = (float) meta->displayHeight / height;
            HSpacing = (float) meta->displayWidth / width;
        }
        dict_set_f32(par, CFSTR("HorizontalSpacing"), HSpacing);
        dict_set_f32(par, CFSTR("VerticalSpacing"), VSpacing);


        /* SampleDescriptionExtensionAtoms dict */
        switch (mVideoCodecType) {
            case kCMVideoCodecType_H264:
                dict_set_data(atoms, CFSTR("avcC"), (uint8_t *) pData, size);
                break;

            case kCMVideoCodecType_HEVC:
                dict_set_data(atoms, CFSTR("hvcC"), (uint8_t *) pData, size);
                break;

            case kCMVideoCodecType_MPEG4Video:
                dict_set_data(atoms, CFSTR("esds"), (uint8_t *) pData, size);
                break;

            default:
                break;
        }

        /* Extensions dict */
        dict_set_string(extensions, CFSTR("CVImageBufferChromaLocationBottomField"), "left");
        dict_set_string(extensions, CFSTR("CVImageBufferChromaLocationTopField"), "left");
        dict_set_boolean(extensions, CFSTR("FullRangeVideo"), FALSE);
        dict_set_object(extensions, CFSTR("CVPixelAspectRatio"), (CFTypeRef *) par);
        dict_set_object(extensions, CFSTR("SampleDescriptionExtensionAtoms"), (CFTypeRef *) atoms);

        if (width <= 0 || height <= 0) {
            parserInfo info{0};