summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--.hgignore2
-rw-r--r--linux/drivers/media/dvb/siano/Kconfig41
-rw-r--r--linux/drivers/media/dvb/siano/Makefile9
-rw-r--r--linux/drivers/media/dvb/siano/smssdio.c54
-rw-r--r--linux/drivers/media/radio/Kconfig10
-rw-r--r--linux/drivers/media/video/em28xx/em28xx-cards.c40
-rw-r--r--linux/drivers/media/video/em28xx/em28xx.h1
-rw-r--r--linux/drivers/media/video/gspca/Kconfig8
-rw-r--r--v4l/versions.txt1
-rw-r--r--v4l2-apps/test/v4l2grab.c2
-rw-r--r--v4l2-spec/Makefile16
-rw-r--r--v4l2-spec/libv4l.sgml168
-rw-r--r--v4l2-spec/v4l2.sgml38
13 files changed, 326 insertions, 64 deletions
diff --git a/.hgignore b/.hgignore
index e09075e29..bc408c495 100644
--- a/.hgignore
+++ b/.hgignore
@@ -66,6 +66,8 @@ v4l2-spec/capture.c.sgml$
v4l2-spec/entities.sgml$
v4l2-spec/.*\.stamp$
v4l2-spec/indices.sgml$
+v4l2-spec/libv4l-fmt.sgml$
+v4l2-spec/v4l2grab.c.sgml$
v4l2-spec/v4l2-single$
v4l2-spec/v4l2$
v4l2-spec/v4l2.pdf$
diff --git a/linux/drivers/media/dvb/siano/Kconfig b/linux/drivers/media/dvb/siano/Kconfig
index 88847d1dc..ff297ceaf 100644
--- a/linux/drivers/media/dvb/siano/Kconfig
+++ b/linux/drivers/media/dvb/siano/Kconfig
@@ -2,25 +2,34 @@
# Siano Mobile Silicon Digital TV device configuration
#
-config DVB_SIANO_SMS1XXX
- tristate "Siano SMS1XXX USB dongle support"
- depends on DVB_CORE && USB && INPUT
+config SMS_SIANO_MDTV
+ tristate "Siano SMS1xxx based MDTV receiver"
+ depends on DVB_CORE && INPUT
---help---
- Choose Y here if you have a USB dongle with a SMS1XXX chipset.
+ Choose Y or M here if you have MDTV receiver with a Siano chipset.
- To compile this driver as a module, choose M here: the
- module will be called sms1xxx.
+ To compile this driver as a module, choose M here
+ (The module will be called smsmdtv).
-config DVB_SIANO_SMS1XXX_SMS_IDS
- bool "Enable support for Siano Mobile Silicon default USB IDs"
- depends on DVB_SIANO_SMS1XXX
- default y
- ---help---
- Choose Y here if you have a USB dongle with a SMS1XXX chipset
- that uses Siano Mobile Silicon's default usb vid:pid.
+ Further documentation on this driver can be found on the WWW
+ at http://www.siano-ms.com/
+
+if SMS_SIANO_MDTV
+menu "Siano module components"
- Choose N here if you would prefer to use Siano's external driver.
+# Hardware interfaces support
- Further documentation on this driver can be found on the WWW at
- <http://www.siano-ms.com/>.
+config SMS_USB_DRV
+ tristate "USB interface support"
+ depends on DVB_CORE && USB
+ ---help---
+ Choose if you would like to have Siano's support for USB interface
+config SMS_SDIO_DRV
+ tristate "SDIO interface support"
+ depends on DVB_CORE && MMC
+ default m
+ ---help---
+ Choose if you would like to have Siano's support for SDIO interface
+endmenu
+endif # SMS_SIANO_MDTV
diff --git a/linux/drivers/media/dvb/siano/Makefile b/linux/drivers/media/dvb/siano/Makefile
index c6644d909..c54140b5a 100644
--- a/linux/drivers/media/dvb/siano/Makefile
+++ b/linux/drivers/media/dvb/siano/Makefile
@@ -1,8 +1,9 @@
-sms1xxx-objs := smscoreapi.o sms-cards.o smsendian.o smsir.o
-obj-$(CONFIG_DVB_SIANO_SMS1XXX) += sms1xxx.o
-obj-$(CONFIG_DVB_SIANO_SMS1XXX) += smsusb.o
-obj-$(CONFIG_DVB_SIANO_SMS1XXX) += smsdvb.o
+smsmdtv-objs := smscoreapi.o sms-cards.o smsendian.o smsir.o
+
+obj-$(CONFIG_SMS_SIANO_MDTV) += smsmdtv.o smsdvb.o
+obj-$(CONFIG_SMS_USB_DRV) += smsusb.o
+obj-$(CONFIG_SMS_SDIO_DRV) += smssdio.o
EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core
diff --git a/linux/drivers/media/dvb/siano/smssdio.c b/linux/drivers/media/dvb/siano/smssdio.c
index dfaa49a53..d1d652e7f 100644
--- a/linux/drivers/media/dvb/siano/smssdio.c
+++ b/linux/drivers/media/dvb/siano/smssdio.c
@@ -46,6 +46,7 @@
#define SMSSDIO_DATA 0x00
#define SMSSDIO_INT 0x04
+#define SMSSDIO_BLOCK_SIZE 128
static const struct sdio_device_id smssdio_ids[] = {
{SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_STELLAR),
@@ -85,7 +86,8 @@ static int smssdio_sendrequest(void *context, void *buffer, size_t size)
sdio_claim_host(smsdev->func);
while (size >= smsdev->func->cur_blksize) {
- ret = sdio_write_blocks(smsdev->func, SMSSDIO_DATA, buffer, 1);
+ ret = sdio_memcpy_toio(smsdev->func, SMSSDIO_DATA,
+ buffer, smsdev->func->cur_blksize);
if (ret)
goto out;
@@ -94,8 +96,8 @@ static int smssdio_sendrequest(void *context, void *buffer, size_t size)
}
if (size) {
- ret = sdio_write_bytes(smsdev->func, SMSSDIO_DATA,
- buffer, size);
+ ret = sdio_memcpy_toio(smsdev->func, SMSSDIO_DATA,
+ buffer, size);
}
out:
@@ -125,23 +127,23 @@ static void smssdio_interrupt(struct sdio_func *func)
*/
isr = sdio_readb(func, SMSSDIO_INT, &ret);
if (ret) {
- dev_err(&smsdev->func->dev,
- "Unable to read interrupt register!\n");
+ sms_err("Unable to read interrupt register!\n");
return;
}
if (smsdev->split_cb == NULL) {
cb = smscore_getbuffer(smsdev->coredev);
if (!cb) {
- dev_err(&smsdev->func->dev,
- "Unable to allocate data buffer!\n");
+ sms_err("Unable to allocate data buffer!\n");
return;
}
- ret = sdio_read_blocks(smsdev->func, cb->p, SMSSDIO_DATA, 1);
+ ret = sdio_memcpy_fromio(smsdev->func,
+ cb->p,
+ SMSSDIO_DATA,
+ SMSSDIO_BLOCK_SIZE);
if (ret) {
- dev_err(&smsdev->func->dev,
- "Error %d reading initial block!\n", ret);
+ sms_err("Error %d reading initial block!\n", ret);
return;
}
@@ -152,7 +154,10 @@ static void smssdio_interrupt(struct sdio_func *func)
return;
}
- size = hdr->msgLength - smsdev->func->cur_blksize;
+ if (hdr->msgLength > smsdev->func->cur_blksize)
+ size = hdr->msgLength - smsdev->func->cur_blksize;
+ else
+ size = 0;
} else {
cb = smsdev->split_cb;
hdr = cb->p;
@@ -162,23 +167,24 @@ static void smssdio_interrupt(struct sdio_func *func)
smsdev->split_cb = NULL;
}
- if (hdr->msgLength > smsdev->func->cur_blksize) {
+ if (size) {
void *buffer;
- size = ALIGN(size, 128);
- buffer = cb->p + hdr->msgLength;
+ buffer = cb->p + (hdr->msgLength - size);
+ size = ALIGN(size, SMSSDIO_BLOCK_SIZE);
- BUG_ON(smsdev->func->cur_blksize != 128);
+ BUG_ON(smsdev->func->cur_blksize != SMSSDIO_BLOCK_SIZE);
/*
* First attempt to transfer all of it in one go...
*/
- ret = sdio_read_blocks(smsdev->func, buffer,
- SMSSDIO_DATA, size / 128);
+ ret = sdio_memcpy_fromio(smsdev->func,
+ buffer,
+ SMSSDIO_DATA,
+ size);
if (ret && ret != -EINVAL) {
smscore_putbuffer(smsdev->coredev, cb);
- dev_err(&smsdev->func->dev,
- "Error %d reading data from card!\n", ret);
+ sms_err("Error %d reading data from card!\n", ret);
return;
}
@@ -191,12 +197,12 @@ static void smssdio_interrupt(struct sdio_func *func)
*/
if (ret == -EINVAL) {
while (size) {
- ret = sdio_read_blocks(smsdev->func,
- buffer, SMSSDIO_DATA, 1);
+ ret = sdio_memcpy_fromio(smsdev->func,
+ buffer, SMSSDIO_DATA,
+ smsdev->func->cur_blksize);
if (ret) {
smscore_putbuffer(smsdev->coredev, cb);
- dev_err(&smsdev->func->dev,
- "Error %d reading "
+ sms_err("Error %d reading "
"data from card!\n", ret);
return;
}
@@ -269,7 +275,7 @@ static int smssdio_probe(struct sdio_func *func,
if (ret)
goto release;
- ret = sdio_set_block_size(func, 128);
+ ret = sdio_set_block_size(func, SMSSDIO_BLOCK_SIZE);
if (ret)
goto disable;
diff --git a/linux/drivers/media/radio/Kconfig b/linux/drivers/media/radio/Kconfig
index 41bbec6df..0e39edf75 100644
--- a/linux/drivers/media/radio/Kconfig
+++ b/linux/drivers/media/radio/Kconfig
@@ -288,16 +288,6 @@ config RADIO_TYPHOON
To compile this driver as a module, choose M here: the
module will be called radio-typhoon.
-config RADIO_TYPHOON_PROC_FS
- bool "Support for /proc/radio-typhoon"
- depends on PROC_FS && RADIO_TYPHOON
- help
- Say Y here if you want the typhoon radio card driver to write
- status information (frequency, volume, muted, mute frequency,
- base address) to /proc/radio-typhoon. The file can be viewed with
- your favorite pager (i.e. use "more /proc/radio-typhoon" or "less
- /proc/radio-typhoon" or simply "cat /proc/radio-typhoon").
-
config RADIO_TYPHOON_PORT
hex "Typhoon I/O port (0x316 or 0x336)"
depends on RADIO_TYPHOON=y
diff --git a/linux/drivers/media/video/em28xx/em28xx-cards.c b/linux/drivers/media/video/em28xx/em28xx-cards.c
index c936e7660..a38586176 100644
--- a/linux/drivers/media/video/em28xx/em28xx-cards.c
+++ b/linux/drivers/media/video/em28xx/em28xx-cards.c
@@ -1802,6 +1802,25 @@ static inline void em28xx_set_model(struct em28xx *dev)
EM28XX_I2C_FREQ_100_KHZ;
}
+
+/* FIXME: Should be replaced by a proper mt9m111 driver */
+static int em28xx_initialize_mt9m111(struct em28xx *dev)
+{
+ int i;
+ unsigned char regs[][3] = {
+ { 0x0d, 0x00, 0x01, }, /* reset and use defaults */
+ { 0x0d, 0x00, 0x00, },
+ { 0x0a, 0x00, 0x21, },
+ { 0x21, 0x04, 0x00, }, /* full readout speed, no row/col skipping */
+ };
+
+ for (i = 0; i < ARRAY_SIZE(regs); i++)
+ i2c_master_send(&dev->i2c_client, &regs[i][0], 3);
+
+ return 0;
+}
+
+
/* FIXME: Should be replaced by a proper mt9m001 driver */
static int em28xx_initialize_mt9m001(struct em28xx *dev)
{
@@ -1830,7 +1849,7 @@ static int em28xx_initialize_mt9m001(struct em28xx *dev)
/* HINT method: webcam I2C chips
*
- * This method work for webcams with Micron sensors
+ * This method works for webcams with Micron sensors
*/
static int em28xx_hint_sensor(struct em28xx *dev)
{
@@ -1876,6 +1895,23 @@ static int em28xx_hint_sensor(struct em28xx *dev)
dev->vinctl = 0x00;
break;
+
+ case 0x143a: /* MT9M111 as found in the ECS G200 */
+ dev->model = EM2750_BOARD_UNKNOWN;
+ em28xx_set_model(dev);
+
+ sensor_name = "mt9m111";
+ dev->board.xclk = EM28XX_XCLK_FREQUENCY_48MHZ;
+ dev->em28xx_sensor = EM28XX_MT9M111;
+ em28xx_initialize_mt9m111(dev);
+ dev->sensor_xres = 640;
+ dev->sensor_yres = 512;
+
+ dev->vinmode = 0x0a;
+ dev->vinctl = 0x00;
+
+ break;
+
#if 0
case 0x8411:
case 0x8421:
@@ -1896,7 +1932,7 @@ static int em28xx_hint_sensor(struct em28xx *dev)
break;
default:
- printk("Unknown Micron Sensor 0x%04x\n", be16_to_cpu(version));
+ printk("Unknown Micron Sensor 0x%04x\n", version);
return -EINVAL;
}
diff --git a/linux/drivers/media/video/em28xx/em28xx.h b/linux/drivers/media/video/em28xx/em28xx.h
index c76da6985..70a41b640 100644
--- a/linux/drivers/media/video/em28xx/em28xx.h
+++ b/linux/drivers/media/video/em28xx/em28xx.h
@@ -368,6 +368,7 @@ enum em28xx_sensor {
EM28XX_NOSENSOR = 0,
EM28XX_MT9V011,
EM28XX_MT9M001,
+ EM28XX_MT9M111,
};
enum em28xx_adecoder {
diff --git a/linux/drivers/media/video/gspca/Kconfig b/linux/drivers/media/video/gspca/Kconfig
index 34f46f2bc..a14561956 100644
--- a/linux/drivers/media/video/gspca/Kconfig
+++ b/linux/drivers/media/video/gspca/Kconfig
@@ -113,10 +113,10 @@ config USB_GSPCA_SN9C20X
module will be called gspca_sn9c20x.
config USB_GSPCA_SN9C20X_EVDEV
- bool "Enable evdev support"
- depends on USB_GSPCA_SN9C20X
- ---help---
- Say Y here in order to enable evdev support for sn9c20x webcam button.
+ bool "Enable evdev support"
+ depends on USB_GSPCA_SN9C20X
+ ---help---
+ Say Y here in order to enable evdev support for sn9c20x webcam button.
config USB_GSPCA_SONIXB
tristate "SONIX Bayer USB Camera Driver"
diff --git a/v4l/versions.txt b/v4l/versions.txt
index 01b553d6c..9e23e500c 100644
--- a/v4l/versions.txt
+++ b/v4l/versions.txt
@@ -49,6 +49,7 @@ DVB_FIREDTV
[2.6.20]
#This driver requires HID_REQ_GET_REPORT
USB_SI470X
+RADIO_SI470X
# use of struct delayed_work
USB_GSPCA_FINEPIX
# uses linux/hid.h and struct delayed_work
diff --git a/v4l2-apps/test/v4l2grab.c b/v4l2-apps/test/v4l2grab.c
index 153a0dd30..de921874b 100644
--- a/v4l2-apps/test/v4l2grab.c
+++ b/v4l2-apps/test/v4l2grab.c
@@ -1,5 +1,5 @@
/* V4L2 video picture grabber
- Copyright (C) 2006 Mauro Carvalho Chehab <mchehab@infradead.org>
+ Copyright (C) 2009 Mauro Carvalho Chehab <mchehab@infradead.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
diff --git a/v4l2-spec/Makefile b/v4l2-spec/Makefile
index 8f40e8614..616445137 100644
--- a/v4l2-spec/Makefile
+++ b/v4l2-spec/Makefile
@@ -5,6 +5,7 @@ SHELL=/bin/bash
SGMLS = \
biblio.sgml \
capture.c.sgml \
+ v4l2grab.c.sgml \
common.sgml \
compat.sgml \
controls.sgml \
@@ -20,6 +21,7 @@ SGMLS = \
dev-sliced-vbi.sgml \
dev-teletext.sgml \
driver.sgml \
+ libv4l.sgml \
entities.sgml \
fdl-appendix.sgml \
func-close.sgml \
@@ -323,6 +325,12 @@ DOCUMENTED = \
-e "s/\(V4L2_PIX_FMT_[A-Z0-9_]\+\) /<link linkend=\"\1\">\1<\/link> /g" \
-e ":a;s/\(linkend=\".*\)_\(.*\">\)/\1-\2/;ta"
+libv4l-fmt.sgml:
+ cat ../v4l2-apps/libv4l/libv4lconvert/*.c| \
+ perl -ne 'if (m/(V4L2_PIX_FMT_[^\s\;\\)\,:]+)/) { printf "<link linkend=\"$$1\"><constant>$$1</constant></link>,\n"; };' \
+ |sort|uniq| \
+ sed -e ":a;s/\(linkend=\".*\)_\(.*\">\)/\1-\2/;ta" > $@
+
capture.c.sgml: ../v4l2-apps/test/capture-example.c Makefile
echo "<programlisting>" > $@
expand --tabs=8 < $< | \
@@ -330,6 +338,13 @@ capture.c.sgml: ../v4l2-apps/test/capture-example.c Makefile
sed 's/i\.e\./&ie;/' >> $@
echo "</programlisting>" >> $@
+v4l2grab.c.sgml: ../v4l2-apps/test/v4l2grab.c Makefile
+ echo "<programlisting>" > $@
+ expand --tabs=8 < $< | \
+ sed $(ESCAPE) $(DOCUMENTED) | \
+ sed 's/i\.e\./&ie;/' >> $@
+ echo "</programlisting>" >> $@
+
videodev2.h.sgml: ../linux/include/linux/videodev2.h Makefile
echo "<programlisting>" > $@
expand --tabs=8 < $< | \
@@ -488,6 +503,7 @@ distclean clean:
rm -f *.stamp
rm -f videodev2.h.sgml
rm -f capture.c.sgml
+ rm -f v4l2grab.c.sgml
rm -f capture
rm -f indices.sgml entities.sgml
rm -rf v4l2 v4l2-single v4l2.pdf
diff --git a/v4l2-spec/libv4l.sgml b/v4l2-spec/libv4l.sgml
new file mode 100644
index 000000000..ec1f8b6fe
--- /dev/null
+++ b/v4l2-spec/libv4l.sgml
@@ -0,0 +1,168 @@
+<title>Libv4l Userspace Library</title>
+<section id="libv4l-introduction">
+ <title>Introduction</title>
+
+ <para>libv4l is a collection of libraries which adds a thin abstraction
+layer on top of video4linux2 devices. The purpose of this (thin) layer
+is to make it easy for application writers to support a wide variety of
+devices without having to write separate code for different devices in the
+same class.</para>
+<para>An example of using libv4l is provided by
+<link linkend='v4l2grab-example'>v4l2grab</link>.
+</para>
+
+ <para>libv4l consists of 3 different libraries:</para>
+ <section>
+ <title>libv4lconvert</title>
+
+ <para>libv4lconvert is a library that converts several
+different pixelformats found in V4L2 drivers into a few common RGB and
+YUY formats.</para>
+ <para>It currently accepts the following V4L2 driver formats:
+<link linkend="V4L2-PIX-FMT-BGR24"><constant>V4L2_PIX_FMT_BGR24</constant></link>,
+<link linkend="V4L2-PIX-FMT-HM12"><constant>V4L2_PIX_FMT_HM12</constant></link>,
+<link linkend="V4L2-PIX-FMT-JPEG"><constant>V4L2_PIX_FMT_JPEG</constant></link>,
+<link linkend="V4L2-PIX-FMT-MJPEG"><constant>V4L2_PIX_FMT_MJPEG</constant></link>,
+<link linkend="V4L2-PIX-FMT-MR97310A"><constant>V4L2_PIX_FMT_MR97310A</constant></link>,
+<link linkend="V4L2-PIX-FMT-OV511"><constant>V4L2_PIX_FMT_OV511</constant></link>,
+<link linkend="V4L2-PIX-FMT-OV518"><constant>V4L2_PIX_FMT_OV518</constant></link>,
+<link linkend="V4L2-PIX-FMT-PAC207"><constant>V4L2_PIX_FMT_PAC207</constant></link>,
+<link linkend="V4L2-PIX-FMT-PJPG"><constant>V4L2_PIX_FMT_PJPG</constant></link>,
+<link linkend="V4L2-PIX-FMT-RGB24"><constant>V4L2_PIX_FMT_RGB24</constant></link>,
+<link linkend="V4L2-PIX-FMT-SBGGR8"><constant>V4L2_PIX_FMT_SBGGR8</constant></link>,
+<link linkend="V4L2-PIX-FMT-SGBRG8"><constant>V4L2_PIX_FMT_SGBRG8</constant></link>,
+<link linkend="V4L2-PIX-FMT-SGRBG8"><constant>V4L2_PIX_FMT_SGRBG8</constant></link>,
+<link linkend="V4L2-PIX-FMT-SN9C10X"><constant>V4L2_PIX_FMT_SN9C10X</constant></link>,
+<link linkend="V4L2-PIX-FMT-SN9C20X-I420"><constant>V4L2_PIX_FMT_SN9C20X_I420</constant></link>,
+<link linkend="V4L2-PIX-FMT-SPCA501"><constant>V4L2_PIX_FMT_SPCA501</constant></link>,
+<link linkend="V4L2-PIX-FMT-SPCA505"><constant>V4L2_PIX_FMT_SPCA505</constant></link>,
+<link linkend="V4L2-PIX-FMT-SPCA508"><constant>V4L2_PIX_FMT_SPCA508</constant></link>,
+<link linkend="V4L2-PIX-FMT-SPCA561"><constant>V4L2_PIX_FMT_SPCA561</constant></link>,
+<link linkend="V4L2-PIX-FMT-SQ905C"><constant>V4L2_PIX_FMT_SQ905C</constant></link>,
+<constant>V4L2_PIX_FMT_SRGGB8</constant>,
+<link linkend="V4L2-PIX-FMT-UYVY"><constant>V4L2_PIX_FMT_UYVY</constant></link>,
+<link linkend="V4L2-PIX-FMT-YUV420"><constant>V4L2_PIX_FMT_YUV420</constant></link>,
+<link linkend="V4L2-PIX-FMT-YUYV"><constant>V4L2_PIX_FMT_YUYV</constant></link>,
+<link linkend="V4L2-PIX-FMT-YVU420"><constant>V4L2_PIX_FMT_YVU420</constant></link>,
+and <link linkend="V4L2-PIX-FMT-YVYU"><constant>V4L2_PIX_FMT_YVYU</constant></link>.
+</para>
+ <para>Later on libv4lconvert was expanded to also be able to do
+various video processing functions to improve webcam video quality.
+The video processing is split in to 2 parts: libv4lconvert/control and
+libv4lconvert/processing.</para>
+
+ <para>The control part is used to offer video controls which can
+be used to control the video processing functions made available by
+ libv4lconvert/processing. These controls are stored application wide
+(until reboot) by using a persistent shared memory object.</para>
+
+ <para>libv4lconvert/processing offers the actual video
+processing functionality.</para>
+ </section>
+ <section>
+ <title>libv4l1</title>
+ <para>This library offers functions that can be used to quickly
+make v4l1 applications work with v4l2 devices. These functions work exactly
+like the normal open/close/etc, except that libv4l1 does full emulation of
+the v4l1 api on top of v4l2 drivers, in case of v4l1 drivers it
+will just pass calls through.</para>
+ <para>Since those functions are emulations of the old V4L1 API,
+it shouldn't be used for new applications.</para>
+ </section>
+ <section>
+ <title>libv4l2</title>
+ <para>This library should be used for all modern V4L2
+applications.</para>
+ <para>It provides handles to call V4L2 open/ioctl/close/poll
+methods. Instead of just providing the raw output of the device, it enhances
+the calls in the sense that it will use libv4lconvert to provide more video
+formats and to enhance the image quality.</para>
+ <para>In most cases, libv4l2 just passes the calls directly
+through to the v4l2 driver, intercepting the calls to
+<link linkend='VIDIOC-G-FMT'><constant>VIDIOC_TRY_FMT</constant></link>,
+<link linkend='VIDIOC-G-FMT'><constant>VIDIOC_G_FMT</constant></link>
+<link linkend='VIDIOC-G-FMT'><constant>VIDIOC_S_FMT</constant></link>
+<link linkend='VIDIOC-ENUM-FRAMESIZES'><constant>VIDIOC_ENUM_FRAMESIZES</constant></link>
+and
+<link linkend='VIDIOC-ENUM-FRAMEINTERVALS'><constant>VIDIOC_ENUM_FRAMEINTERVALS</constant></link>
+in order to emulate the formats
+<link linkend="V4L2-PIX-FMT-BGR24"><constant>V4L2_PIX_FMT_BGR24</constant></link>,
+<link linkend="V4L2-PIX-FMT-RGB24"><constant>V4L2_PIX_FMT_RGB24</constant></link>,
+<link linkend="V4L2-PIX-FMT-YUV420"><constant>V4L2_PIX_FMT_YUV420</constant></link>,
+and <link linkend="V4L2-PIX-FMT-YVU420"><constant>V4L2_PIX_FMT_YVU420</constant></link>,
+if they aren't available in the driver.
+<link linkend='VIDIOC-ENUM-FMT'><constant>VIDIOC_ENUM_FMT</constant></link>
+keeps enumerating the hardware supported formats, plus the emulated formats
+offered by libv4l at the end.
+</para>
+ <section id="libv4l-ops">
+ <title>Libv4l device control functions</title>
+ <para>The common file operation methods are provided by
+libv4l.</para>
+ <para>Those functions operate just like glibc
+open/close/dup/ioctl/read/mmap/munmap:</para>
+<itemizedlist><listitem>
+ <para>int v4l2_open(const char *file, int oflag,
+...) -
+operates like the standard <link linkend='func-open'>open()</link> function.
+</para></listitem><listitem>
+ <para>int v4l2_close(int fd) -
+operates like the standard <link linkend='func-close'>close()</link> function.
+</para></listitem><listitem>
+ <para>int v4l2_dup(int fd) -
+operates like the standard dup() function, duplicating a file handler.
+</para></listitem><listitem>
+ <para>int v4l2_ioctl (int fd, unsigned long int request, ...) -
+operates like the standard <link linkend='func-ioctl'>ioctl()</link> function.
+</para></listitem><listitem>
+ <para>int v4l2_read (int fd, void* buffer, size_t n) -
+operates like the standard <link linkend='func-read'>read()</link> function.
+</para></listitem><listitem>
+ <para>void v4l2_mmap(void *start, size_t length, int prot, int flags, int fd, int64_t offset); -
+operates like the standard <link linkend='func-mmap'>mmap()</link> function.
+</para></listitem><listitem>
+ <para>int v4l2_munmap(void *_start, size_t length); -
+operates like the standard <link linkend='func-munmap'>munmap()</link> function.
+</para></listitem>
+</itemizedlist>
+ <para>Those functions provide additional control:</para>
+<itemizedlist><listitem>
+ <para>int v4l2_fd_open(int fd, int v4l2_flags) -
+opens an already opened fd for further use through v4l2lib and possibly
+modify libv4l2's default behavior through the v4l2_flags argument.
+Currently, v4l2_flags can be <constant>V4L2_DISABLE_CONVERSION</constant>,
+to disable format conversion.
+</para></listitem><listitem>
+ <para>int v4l2_set_control(int fd, int cid, int value) -
+This function takes a value of 0 - 65535, and then scales that range to
+the actual range of the given v4l control id, and then if the cid exists
+and is not locked sets the cid to the scaled value.
+</para></listitem><listitem>
+ <para>int v4l2_get_control(int fd, int cid) -
+This function returns a value of 0 - 65535, scaled to from the actual range
+of the given v4l control id. when the cid does not exist, could not be
+accessed for some reason, or some error occured 0 is returned.
+</para></listitem>
+</itemizedlist>
+ </section>
+ </section>
+ <section>
+
+ <title>v4l1compat.so wrapper library</title>
+
+ <para>This library intercepts calls to
+open/close/ioctl/mmap/mmunmap operations and redirects them to the libv4l
+counterparts, by using LD_PRELOAD=/usr/lib/v4l1compat.so. It also
+emulates V4L1 calls via V4L2 API.</para>
+ <para>It allows usage of binary legacy applications that
+still don't use libv4l.</para>
+ </section>
+
+</section>
+<!--
+Local Variables:
+mode: sgml
+sgml-parent-document: "v4l2.sgml"
+indent-tabs-mode: nil
+End:
+-->
diff --git a/v4l2-spec/v4l2.sgml b/v4l2-spec/v4l2.sgml
index bae7eb441..8e7610685 100644
--- a/v4l2-spec/v4l2.sgml
+++ b/v4l2-spec/v4l2.sgml
@@ -25,7 +25,7 @@
<book id="v4l2spec">
<bookinfo>
<title>Video for Linux Two API Specification</title>
- <subtitle>Revision 0.26</subtitle>
+ <subtitle>Revision 0.27</subtitle>
<authorgroup>
<author>
@@ -92,6 +92,18 @@ MPEG stream embedded, sliced VBI data format in this specification.
</author>
</authorgroup>
+ <author>
+ <firstname>Mauro</firstname>
+ <surname>Carvalho Chehab</surname>
+ <contrib>Documented libv4l, designed and added v4l2grab example
+ </contrib>
+ <affiliation>
+ <address>
+ <email>mchehab@redhat.com</email>
+ </address>
+ </affiliation>
+ </author>
+
<copyright>
<year>1999</year>
<year>2000</year>
@@ -105,12 +117,13 @@ MPEG stream embedded, sliced VBI data format in this specification.
<year>2008</year>
<year>2009</year>
<holder>Bill Dirks, Michael H. Schimek, Hans Verkuil, Martin
-Rubli, Andy Walls</holder>
+Rubli, Andy Walls, Mauro Carvalho Chehab</holder>
</copyright>
<legalnotice>
<para>This document is copyrighted &copy; 1999-2009 by Bill
-Dirks, Michael H. Schimek, Hans Verkuil, Martin Rubli, and Andy Walls.</para>
+Dirks, Michael H. Schimek, Hans Verkuil, Martin Rubli, Andy Walls and
+Mauro Carvalho Chehab.</para>
<para>Permission is granted to copy, distribute and/or modify
this document under the terms of the GNU Free Documentation License,
@@ -131,6 +144,13 @@ structs, ioctls) must be noted in more detail in the history chapter
applications. -->
<revision>
+ <revnumber>0.27</revnumber>
+ <date>2009-08-15</date>
+ <authorinitials>mcc</authorinitials>
+ <revremark>Added libv4l documentation and v4l2grab example.</revremark>
+ </revision>
+
+ <revision>
<revnumber>0.26</revnumber>
<date>2009-06-15</date>
<authorinitials>hv</authorinitials>
@@ -471,6 +491,10 @@ available here: <ulink url="http://linuxtv.org/downloads/video4linux/API/V4L2_AP
&sub-driver;
</chapter>
+ <chapter id="libv4l">
+ &sub-libv4l;
+ </chapter>
+
<chapter id="compat">
&sub-compat;
</chapter>
@@ -485,6 +509,14 @@ available here: <ulink url="http://linuxtv.org/downloads/video4linux/API/V4L2_AP
&sub-capture-c;
</appendix>
+ <appendix id="v4l2grab-example">
+ <title>Video Grabber example using libv4l</title>
+ <para>This program demonstrates how to grab V4L2 images in ppm format by
+using libv4l handlers. The advantage is that this grabber can potentially work
+with any V4L2 driver.</para>
+ &sub-v4l2grab-c;
+ </appendix>
+
&sub-fdl-appendix;
&sub-indices;
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-31 19:56:32 +0000