Function avmQualityToQuantizer

src/codec_avm.c:421–431

Converts quality to avm's quantizer in the range of [M:255], where M=0/-48/-96 for 8/10/12 bit. See --min-qp help in https://gitlab.com/AOMediaCodec/avm/-/blob/main/apps/avmenc.c

// See --min-qp help in
// https://gitlab.com/AOMediaCodec/avm/-/blob/main/apps/avmenc.c
static int avmQualityToQuantizer(int quality, uint32_t depth)
{
    if (depth == 10) {
        return 255 - (quality * (255 + 48) + 50) / 100;
    }
    if (depth == 12) {
        return 255 - (quality * (255 + 96) + 50) / 100;
    }
    assert(depth == 8);
    return 255 - (quality * 255 + 50) / 100;
}

static avifBool avmCodecEncodeFinish(avifCodec * codec, avifCodecEncodeOutput * output);