feat: Use new libavif quality encoder option

This replaces the (now deprecated) qmin and qmax options in libavif 1.x

src/pillow_avif/AvifImagePlugin.py

@@ -136,7 +136,7 @@ def _save(im, fp, filename, save_all=False):
         # - qmax is 0 for quality=100, then qmax increases linearly relative to
         #   quality decreasing, until it flattens out at quality=37.
         quality = info.get("quality", 75)
-        if not isinstance(quality, int):
+        if not isinstance(quality, int) or quality < 0 or quality > 100:
             raise ValueError("Invalid quality setting")
         qmin = max(0, min(64 - quality, 63))
         qmax = max(0, min(100 - quality, 63))
@@ -186,6 +186,7 @@ def _save(im, fp, filename, save_all=False):
         subsampling,
         qmin,
         qmax,
+        quality,
         speed,
         codec,
         range_,

src/pillow_avif/_avif.c

@@ -13,6 +13,7 @@ typedef struct {
     avifPixelFormat subsampling;
     int qmin;
     int qmax;
+    int quality;
     int speed;
     avifCodecChoice codec;
     avifRange range;
@@ -205,6 +206,7 @@ AvifEncoderNew(PyObject *self_, PyObject *args) {
     char *subsampling = "4:2:0";
     int qmin = AVIF_QUANTIZER_BEST_QUALITY;  // =0
     int qmax = 10;                           // "High Quality", but not lossless
+    int quality = 75;
     int speed = 8;
     PyObject *icc_bytes;
     PyObject *exif_bytes;
@@ -227,6 +229,7 @@ AvifEncoderNew(PyObject *self_, PyObject *args) {
             &subsampling,
             &qmin,
             &qmax,
+            &quality,
             &speed,
             &codec,
             &range,
@@ -256,6 +259,7 @@ AvifEncoderNew(PyObject *self_, PyObject *args) {
 
     enc_options.qmin = normalize_quantize_value(qmin);
     enc_options.qmax = normalize_quantize_value(qmax);
+    enc_options.quality = quality;
 
     if (speed < AVIF_SPEED_SLOWEST) {
         speed = AVIF_SPEED_SLOWEST;
@@ -321,8 +325,12 @@ AvifEncoderNew(PyObject *self_, PyObject *args) {
         }
 
         encoder->maxThreads = max_threads;
+#if AVIF_VERSION >= 1000000
+        encoder->quality = enc_options.quality;
+#else
         encoder->minQuantizer = enc_options.qmin;
         encoder->maxQuantizer = enc_options.qmax;
+#endif
         encoder->codecChoice = enc_options.codec;
         encoder->speed = enc_options.speed;
         encoder->timescale = (uint64_t)1000;