fix: use exact qobuz download quality

internal/provider/qobuz/client.go

@@ -364,40 +364,60 @@ func qobuzDownloadExtension(resp map[string]any, quality int, streamURL string)
 }
 
 func qobuzAudioProfile(resp map[string]any, requestedQuality int, ext string) provider.AudioProfile {
+	exactBitDepth, _ := intValue(firstNonNil(resp["bit_depth"], resp["bits_depth"], resp["maximum_bit_depth"]))
+	exactSampling, _ := floatValue(firstNonNil(resp["sampling_rate"], resp["sample_rate"], resp["maximum_sampling_rate"]))
 	if formatID, ok := intValue(resp["format_id"]); ok {
 		switch formatID {
 		case 5:
+			if exactBitDepth == 0 {
+				exactBitDepth = 16
+			}
+			if exactSampling == 0 {
+				exactSampling = 44.1
+			}
 			return provider.AudioProfile{
 				Container:    "MP3",
 				Codec:        "MP3",
 				Quality:      "HIGH",
-				BitDepth:     16,
-				SamplingRate: "44.1",
+				BitDepth:     exactBitDepth,
+				SamplingRate: formatSamplingRate(exactSampling),
 				BitrateKbps:  320,
 			}
 		case 6:
+			if exactBitDepth == 0 {
+				exactBitDepth = 16
+			}
+			if exactSampling == 0 {
+				exactSampling = 44.1
+			}
 			return provider.AudioProfile{
 				Container:    "FLAC",
 				Codec:        "FLAC",
 				Quality:      "LOSSLESS",
-				BitDepth:     16,
-				SamplingRate: "44.1",
+				BitDepth:     exactBitDepth,
+				SamplingRate: formatSamplingRate(exactSampling),
 			}
 		case 7:
+			if exactBitDepth == 0 {
+				exactBitDepth = 24
+			}
 			return provider.AudioProfile{
 				Container:    "FLAC",
 				Codec:        "FLAC",
 				Quality:      "HI_RES",
-				BitDepth:     24,
-				SamplingRate: "96",
+				BitDepth:     exactBitDepth,
+				SamplingRate: formatSamplingRate(exactSampling),
 			}
 		case 27:
+			if exactBitDepth == 0 {
+				exactBitDepth = 24
+			}
 			return provider.AudioProfile{
 				Container:    "FLAC",
 				Codec:        "FLAC",
 				Quality:      "HI_RES",
-				BitDepth:     24,
-				SamplingRate: "192",
+				BitDepth:     exactBitDepth,
+				SamplingRate: formatSamplingRate(exactSampling),
 			}
 		}
 	}
@@ -438,6 +458,22 @@ func qobuzAudioProfile(resp map[string]any, requestedQuality int, ext string) pr
 	}
 }
 
+func firstNonNil(vals ...any) any {
+	for _, v := range vals {
+		if v != nil {
+			return v
+		}
+	}
+	return nil
+}
+
+func formatSamplingRate(v float64) string {
+	if v <= 0 {
+		return ""
+	}
+	return strconv.FormatFloat(v, 'f', -1, 64)
+}
+
 func (c *Client) Close() error {
 	return nil
 }

internal/provider/qobuz/client_test.go

@@ -371,6 +371,24 @@ func TestGetDownloadableUsesReturnedURLExtension(t *testing.T) {
 	}
 }
 
+func TestQobuzAudioProfileUsesExactReturnedQuality(t *testing.T) {
+	profile := qobuzAudioProfile(map[string]any{
+		"format_id":     float64(7),
+		"bit_depth":     float64(24),
+		"sampling_rate": float64(44.1),
+	}, 4, "flac")
+	if profile.BitDepth != 24 || profile.SamplingRate != "44.1" || profile.Quality != "HI_RES" {
+		t.Fatalf("unexpected profile: %+v", profile)
+	}
+}
+
+func TestQobuzAudioProfileAvoidsGuessingHiResSampleRate(t *testing.T) {
+	profile := qobuzAudioProfile(map[string]any{"format_id": float64(7)}, 4, "flac")
+	if profile.BitDepth != 24 || profile.SamplingRate != "" || profile.Quality != "HI_RES" {
+		t.Fatalf("unexpected profile: %+v", profile)
+	}
+}
+
 func qobuzSecretSig(requestTS, secret string) string {
 	raw := "trackgetFileUrlformat_id27intentstreamtrack_id19512574" + requestTS + secret
 	hash := md5.Sum([]byte(raw))