From de8c0bf3ec12371150c93adbcd7216b97003305b Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Tue, 3 Mar 2009 09:33:41 +0100 Subject: gspca - most jpeg subdrivers: Change the JPEG header creation. From: Jean-Francois Moine Priority: normal Signed-off-by: Jean-Francois Moine Signed-off-by: Mauro Carvalho Chehab --- linux/drivers/media/video/gspca/stk014.c | 25 ++++++++++++++++++++++--- 1 file changed, 22 insertions(+), 3 deletions(-) (limited to 'linux/drivers/media/video/gspca/stk014.c') diff --git a/linux/drivers/media/video/gspca/stk014.c b/linux/drivers/media/video/gspca/stk014.c index d1d54edd8..dd007cb52 100644 --- a/linux/drivers/media/video/gspca/stk014.c +++ b/linux/drivers/media/video/gspca/stk014.c @@ -21,8 +21,6 @@ #define MODULE_NAME "stk014" #include "gspca.h" -#define QUANT_VAL 7 /* quantization table */ - /* <= 4 KO - 7: good (enough!) */ #include "jpeg.h" MODULE_AUTHOR("Jean-Francois Moine "); @@ -37,6 +35,9 @@ struct sd { unsigned char contrast; unsigned char colors; unsigned char lightfreq; + u8 quality; + + u8 *jpeg_hdr; }; /* V4L2 controls supported by the driver */ @@ -300,6 +301,7 @@ static int sd_config(struct gspca_dev *gspca_dev, sd->contrast = CONTRAST_DEF; sd->colors = COLOR_DEF; sd->lightfreq = FREQ_DEF; + sd->quality = 80; return 0; } @@ -323,8 +325,15 @@ static int sd_init(struct gspca_dev *gspca_dev) /* -- start the camera -- */ static int sd_start(struct gspca_dev *gspca_dev) { + struct sd *sd = (struct sd *) gspca_dev; int ret, value; + /* create the JPEG header */ + sd->jpeg_hdr = kmalloc(JPEG_HDR_SZ, GFP_KERNEL); + jpeg_define(sd->jpeg_hdr, gspca_dev->height, gspca_dev->width, + 0x22); /* JPEG 411 */ + jpeg_set_qual(sd->jpeg_hdr, sd->quality); + /* work on alternate 1 */ usb_set_interface(gspca_dev->dev, gspca_dev->iface, 1); @@ -396,11 +405,19 @@ static void sd_stopN(struct gspca_dev *gspca_dev) PDEBUG(D_STREAM, "camera stopped"); } +static void sd_stop0(struct gspca_dev *gspca_dev) +{ + struct sd *sd = (struct sd *) gspca_dev; + + kfree(sd->jpeg_hdr); +} + static void sd_pkt_scan(struct gspca_dev *gspca_dev, struct gspca_frame *frame, /* target */ __u8 *data, /* isoc packet */ int len) /* iso packet length */ { + struct sd *sd = (struct sd *) gspca_dev; static unsigned char ffd9[] = {0xff, 0xd9}; /* a frame starts with: @@ -417,7 +434,8 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev, ffd9, 2); /* put the JPEG 411 header */ - jpeg_put_header(gspca_dev, frame, 0x22); + gspca_frame_add(gspca_dev, FIRST_PACKET, frame, + sd->jpeg_hdr, JPEG_HDR_SZ); /* beginning of the frame */ #define STKHDRSZ 12 @@ -526,6 +544,7 @@ static const struct sd_desc sd_desc = { .init = sd_init, .start = sd_start, .stopN = sd_stopN, + .stop0 = sd_stop0, .pkt_scan = sd_pkt_scan, .querymenu = sd_querymenu, }; -- cgit v1.2.3 From 001bc08cc9ccdaf3efc87846858fb8d555e7f9cf Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Mon, 2 Mar 2009 10:40:52 +0100 Subject: gspca - most jpeg subdrivers: Have the JPEG quality settable. From: Jean-Francois Moine The JPEG quality of the images (quantization tables) is now settable by the VIDIOC_S_JPEGCOMP ioctl. Priority: normal Signed-off-by: Jean-Francois Moine Signed-off-by: Mauro Carvalho Chehab --- linux/drivers/media/video/gspca/stk014.c | 35 +++++++++++++++++++++++++++++++- 1 file changed, 34 insertions(+), 1 deletion(-) (limited to 'linux/drivers/media/video/gspca/stk014.c') diff --git a/linux/drivers/media/video/gspca/stk014.c b/linux/drivers/media/video/gspca/stk014.c index dd007cb52..f25be20cf 100644 --- a/linux/drivers/media/video/gspca/stk014.c +++ b/linux/drivers/media/video/gspca/stk014.c @@ -36,6 +36,9 @@ struct sd { unsigned char colors; unsigned char lightfreq; u8 quality; +#define QUALITY_MIN 60 +#define QUALITY_MAX 95 +#define QUALITY_DEF 80 u8 *jpeg_hdr; }; @@ -301,7 +304,7 @@ static int sd_config(struct gspca_dev *gspca_dev, sd->contrast = CONTRAST_DEF; sd->colors = COLOR_DEF; sd->lightfreq = FREQ_DEF; - sd->quality = 80; + sd->quality = QUALITY_DEF; return 0; } @@ -535,6 +538,34 @@ static int sd_querymenu(struct gspca_dev *gspca_dev, return -EINVAL; } +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, @@ -547,6 +578,8 @@ static const struct sd_desc sd_desc = { .stop0 = sd_stop0, .pkt_scan = sd_pkt_scan, .querymenu = sd_querymenu, + .get_jcomp = sd_get_jcomp, + .set_jcomp = sd_set_jcomp, }; /* -- module initialisation -- */ -- cgit v1.2.3