X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Fmedia%2Fvideo%2Fgspca%2Fmars.c;h=de769caf013dd2f0e8e4330329e6745840128670;hb=189d92af707ead6aa4a3e14511662462e8e956e2;hp=6eb813e7b714de3c564120b4737c6625444482e2;hpb=71cb2764fcc51bd9e1b95be5b0f2da6f026634c7;p=safe%2Fjmp%2Flinux-2.6

diff --git a/drivers/media/video/gspca/mars.c b/drivers/media/video/gspca/mars.c
index 6eb813e..de769ca 100644
--- a/drivers/media/video/gspca/mars.c
+++ b/drivers/media/video/gspca/mars.c
@@ -37,6 +37,9 @@ struct sd {
 	u8 gamma;
 	u8 sharpness;
 	u8 quality;
+#define QUALITY_MIN 40
+#define QUALITY_MAX 70
+#define QUALITY_DEF 50
 
 	u8 *jpeg_hdr;
 };
@@ -178,7 +181,7 @@ static int sd_config(struct gspca_dev *gspca_dev,
 	sd->colors = COLOR_DEF;
 	sd->gamma = GAMMA_DEF;
 	sd->sharpness = SHARPNESS_DEF;
-	sd->quality = 50;
+	sd->quality = QUALITY_DEF;
 	gspca_dev->nbalt = 9;		/* use the altsetting 08 */
 	return 0;
 }
@@ -198,6 +201,8 @@ static int sd_start(struct gspca_dev *gspca_dev)
 
 	/* create the JPEG header */
 	sd->jpeg_hdr = kmalloc(JPEG_HDR_SZ, GFP_KERNEL);
+	if (!sd->jpeg_hdr)
+		return -ENOMEM;
 	jpeg_define(sd->jpeg_hdr, gspca_dev->height, gspca_dev->width,
 			0x21);		/* JPEG 422 */
 	jpeg_set_qual(sd->jpeg_hdr, sd->quality);
@@ -445,6 +450,34 @@ static int sd_getsharpness(struct gspca_dev *gspca_dev, __s32 *val)
 	return 0;
 }
 
+static int sd_set_jcomp(struct gspca_dev *gspca_dev,
+			struct v4l2_jpegcompression *jcomp)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	if (jcomp->quality < QUALITY_MIN)
+		sd->quality = QUALITY_MIN;
+	else if (jcomp->quality > QUALITY_MAX)
+		sd->quality = QUALITY_MAX;
+	else
+		sd->quality = jcomp->quality;
+	if (gspca_dev->streaming)
+		jpeg_set_qual(sd->jpeg_hdr, sd->quality);
+	return 0;
+}
+
+static int sd_get_jcomp(struct gspca_dev *gspca_dev,
+			struct v4l2_jpegcompression *jcomp)
+{
+	struct sd *sd = (struct sd *) gspca_dev;
+
+	memset(jcomp, 0, sizeof *jcomp);
+	jcomp->quality = sd->quality;
+	jcomp->jpeg_markers = V4L2_JPEG_MARKER_DHT
+			| V4L2_JPEG_MARKER_DQT;
+	return 0;
+}
+
 /* sub-driver description */
 static const struct sd_desc sd_desc = {
 	.name = MODULE_NAME,
@@ -456,6 +489,8 @@ static const struct sd_desc sd_desc = {
 	.stopN = sd_stopN,
 	.stop0 = sd_stop0,
 	.pkt_scan = sd_pkt_scan,
+	.get_jcomp = sd_get_jcomp,
+	.set_jcomp = sd_set_jcomp,
 };
 
 /* -- module initialisation -- */