| /* GStreamer |
| * |
| * Copyright (C) 2002 Ronald Bultje <rbultje@ronald.bitfreak.net> |
| * 2006 Edgard Lima <edgard.lima@gmail.com> |
| * |
| * v4l2_calls.c - generic V4L2 calls handling |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif |
| |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <sys/ioctl.h> |
| #include <sys/mman.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #ifdef __sun |
| /* Needed on older Solaris Nevada builds (72 at least) */ |
| #include <stropts.h> |
| #include <sys/ioccom.h> |
| #endif |
| #include "gstv4l2object.h" |
| #include "gstv4l2tuner.h" |
| #include "gstv4l2colorbalance.h" |
| |
| #include "gstv4l2src.h" |
| #include "gstv4l2sink.h" |
| #include "gstv4l2videodec.h" |
| |
| #include "gst/gst-i18n-plugin.h" |
| |
| GST_DEBUG_CATEGORY_EXTERN (v4l2_debug); |
| #define GST_CAT_DEFAULT v4l2_debug |
| |
| /****************************************************** |
| * gst_v4l2_get_capabilities(): |
| * get the device's capturing capabilities |
| * return value: TRUE on success, FALSE on error |
| ******************************************************/ |
| static gboolean |
| gst_v4l2_get_capabilities (GstV4l2Object * v4l2object) |
| { |
| GstElement *e; |
| |
| e = v4l2object->element; |
| |
| GST_DEBUG_OBJECT (e, "getting capabilities"); |
| |
| if (!GST_V4L2_IS_OPEN (v4l2object)) |
| return FALSE; |
| |
| if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_QUERYCAP, |
| &v4l2object->vcap) < 0) |
| goto cap_failed; |
| |
| if (v4l2object->vcap.capabilities & V4L2_CAP_DEVICE_CAPS) |
| v4l2object->device_caps = v4l2object->vcap.device_caps; |
| else |
| v4l2object->device_caps = v4l2object->vcap.capabilities; |
| |
| GST_LOG_OBJECT (e, "driver: '%s'", v4l2object->vcap.driver); |
| GST_LOG_OBJECT (e, "card: '%s'", v4l2object->vcap.card); |
| GST_LOG_OBJECT (e, "bus_info: '%s'", v4l2object->vcap.bus_info); |
| GST_LOG_OBJECT (e, "version: %08x", v4l2object->vcap.version); |
| GST_LOG_OBJECT (e, "capabilites: %08x", v4l2object->device_caps); |
| |
| return TRUE; |
| |
| /* ERRORS */ |
| cap_failed: |
| { |
| GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS, |
| (_("Error getting capabilities for device '%s': " |
| "It isn't a v4l2 driver. Check if it is a v4l1 driver."), |
| v4l2object->videodev), GST_ERROR_SYSTEM); |
| return FALSE; |
| } |
| } |
| |
| /****************************************************** |
| * The video4linux command line tool v4l2-ctrl |
| * normalises the names of the controls received from |
| * the kernel like: |
| * |
| * "Exposure (absolute)" -> "exposure_absolute" |
| * |
| * We follow their lead here. @name is modified |
| * in-place. |
| ******************************************************/ |
| static void |
| gst_v4l2_normalise_control_name (gchar * name) |
| { |
| int i, j; |
| for (i = 0, j = 0; name[j]; ++j) { |
| if (g_ascii_isalnum (name[j])) { |
| if (i > 0 && !g_ascii_isalnum (name[j - 1])) |
| name[i++] = '_'; |
| name[i++] = g_ascii_tolower (name[j]); |
| } |
| } |
| name[i++] = '\0'; |
| } |
| |
| /****************************************************** |
| * gst_v4l2_empty_lists() and gst_v4l2_fill_lists(): |
| * fill/empty the lists of enumerations |
| * return value: TRUE on success, FALSE on error |
| ******************************************************/ |
| static gboolean |
| gst_v4l2_fill_lists (GstV4l2Object * v4l2object) |
| { |
| gint n, next; |
| struct v4l2_queryctrl control = { 0, }; |
| |
| GstElement *e; |
| |
| e = v4l2object->element; |
| |
| GST_DEBUG_OBJECT (e, "getting enumerations"); |
| GST_V4L2_CHECK_OPEN (v4l2object); |
| |
| GST_DEBUG_OBJECT (e, " channels"); |
| /* and now, the channels */ |
| for (n = 0;; n++) { |
| struct v4l2_input input; |
| GstV4l2TunerChannel *v4l2channel; |
| GstTunerChannel *channel; |
| |
| memset (&input, 0, sizeof (input)); |
| |
| input.index = n; |
| if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_ENUMINPUT, &input) < 0) { |
| if (errno == EINVAL || errno == ENOTTY) |
| break; /* end of enumeration */ |
| else { |
| GST_ELEMENT_ERROR (e, RESOURCE, SETTINGS, |
| (_("Failed to query attributes of input %d in device %s"), |
| n, v4l2object->videodev), |
| ("Failed to get %d in input enumeration for %s. (%d - %s)", |
| n, v4l2object->videodev, errno, strerror (errno))); |
| return FALSE; |
| } |
| } |
| |
| GST_LOG_OBJECT (e, " index: %d", input.index); |
| GST_LOG_OBJECT (e, " name: '%s'", input.name); |
| GST_LOG_OBJECT (e, " type: %08x", input.type); |
| GST_LOG_OBJECT (e, " audioset: %08x", input.audioset); |
| GST_LOG_OBJECT (e, " std: %016" G_GINT64_MODIFIER "x", |
| (guint64) input.std); |
| GST_LOG_OBJECT (e, " status: %08x", input.status); |
| |
| v4l2channel = g_object_new (GST_TYPE_V4L2_TUNER_CHANNEL, NULL); |
| channel = GST_TUNER_CHANNEL (v4l2channel); |
| channel->label = g_strdup ((const gchar *) input.name); |
| channel->flags = GST_TUNER_CHANNEL_INPUT; |
| v4l2channel->index = n; |
| |
| if (input.type == V4L2_INPUT_TYPE_TUNER) { |
| struct v4l2_tuner vtun; |
| |
| v4l2channel->tuner = input.tuner; |
| channel->flags |= GST_TUNER_CHANNEL_FREQUENCY; |
| |
| vtun.index = input.tuner; |
| if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_TUNER, &vtun) < 0) { |
| GST_ELEMENT_ERROR (e, RESOURCE, SETTINGS, |
| (_("Failed to get setting of tuner %d on device '%s'."), |
| input.tuner, v4l2object->videodev), GST_ERROR_SYSTEM); |
| g_object_unref (G_OBJECT (channel)); |
| return FALSE; |
| } |
| |
| channel->freq_multiplicator = |
| 62.5 * ((vtun.capability & V4L2_TUNER_CAP_LOW) ? 1 : 1000); |
| channel->min_frequency = vtun.rangelow * channel->freq_multiplicator; |
| channel->max_frequency = vtun.rangehigh * channel->freq_multiplicator; |
| channel->min_signal = 0; |
| channel->max_signal = 0xffff; |
| } |
| if (input.audioset) { |
| /* we take the first. We don't care for |
| * the others for now */ |
| while (!(input.audioset & (1 << v4l2channel->audio))) |
| v4l2channel->audio++; |
| channel->flags |= GST_TUNER_CHANNEL_AUDIO; |
| } |
| |
| v4l2object->channels = |
| g_list_prepend (v4l2object->channels, (gpointer) channel); |
| } |
| v4l2object->channels = g_list_reverse (v4l2object->channels); |
| |
| GST_DEBUG_OBJECT (e, " norms"); |
| /* norms... */ |
| for (n = 0;; n++) { |
| struct v4l2_standard standard = { 0, }; |
| GstV4l2TunerNorm *v4l2norm; |
| |
| GstTunerNorm *norm; |
| |
| /* fill in defaults */ |
| standard.frameperiod.numerator = 1; |
| standard.frameperiod.denominator = 0; |
| standard.index = n; |
| |
| if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_ENUMSTD, &standard) < 0) { |
| if (errno == EINVAL || errno == ENOTTY) |
| break; /* end of enumeration */ |
| #ifdef ENODATA |
| else if (errno == ENODATA) |
| break; /* end of enumeration, as of Linux 3.7-rc1 */ |
| #endif |
| else { |
| GST_ELEMENT_ERROR (e, RESOURCE, SETTINGS, |
| (_("Failed to query norm on device '%s'."), |
| v4l2object->videodev), |
| ("Failed to get attributes for norm %d on devide '%s'. (%d - %s)", |
| n, v4l2object->videodev, errno, strerror (errno))); |
| return FALSE; |
| } |
| } |
| |
| GST_DEBUG_OBJECT (e, " '%s', fps: %d / %d", |
| standard.name, standard.frameperiod.denominator, |
| standard.frameperiod.numerator); |
| |
| v4l2norm = g_object_new (GST_TYPE_V4L2_TUNER_NORM, NULL); |
| norm = GST_TUNER_NORM (v4l2norm); |
| norm->label = g_strdup ((const gchar *) standard.name); |
| gst_value_set_fraction (&norm->framerate, |
| standard.frameperiod.denominator, standard.frameperiod.numerator); |
| v4l2norm->index = standard.id; |
| |
| GST_DEBUG_OBJECT (v4l2object->dbg_obj, "index=%08x, label=%s", |
| (unsigned int) v4l2norm->index, norm->label); |
| |
| v4l2object->norms = g_list_prepend (v4l2object->norms, (gpointer) norm); |
| } |
| v4l2object->norms = g_list_reverse (v4l2object->norms); |
| |
| GST_DEBUG_OBJECT (e, " controls+menus"); |
| |
| /* and lastly, controls+menus (if appropriate) */ |
| next = V4L2_CTRL_FLAG_NEXT_CTRL; |
| n = 0; |
| control.id = next; |
| |
| while (TRUE) { |
| GstV4l2ColorBalanceChannel *v4l2channel; |
| GstColorBalanceChannel *channel; |
| |
| if (!next) |
| n++; |
| |
| retry: |
| /* when we reached the last official CID, continue with private CIDs */ |
| if (n == V4L2_CID_LASTP1) { |
| GST_DEBUG_OBJECT (e, "checking private CIDs"); |
| n = V4L2_CID_PRIVATE_BASE; |
| } |
| GST_DEBUG_OBJECT (e, "checking control %08x", n); |
| |
| control.id = n | next; |
| if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_QUERYCTRL, |
| &control) < 0) { |
| if (next) { |
| if (n > 0) { |
| GST_DEBUG_OBJECT (e, "controls finished"); |
| break; |
| } else { |
| GST_DEBUG_OBJECT (e, "V4L2_CTRL_FLAG_NEXT_CTRL not supported."); |
| next = 0; |
| n = V4L2_CID_BASE; |
| goto retry; |
| } |
| } |
| if (errno == EINVAL || errno == ENOTTY || errno == EIO || errno == ENOENT) { |
| if (n < V4L2_CID_PRIVATE_BASE) { |
| GST_DEBUG_OBJECT (e, "skipping control %08x", n); |
| /* continue so that we also check private controls */ |
| n = V4L2_CID_PRIVATE_BASE - 1; |
| continue; |
| } else { |
| GST_DEBUG_OBJECT (e, "controls finished"); |
| break; |
| } |
| } else { |
| GST_WARNING_OBJECT (e, "Failed querying control %d on device '%s'. " |
| "(%d - %s)", n, v4l2object->videodev, errno, strerror (errno)); |
| continue; |
| } |
| } |
| /* bogus driver might mess with id in unexpected ways (e.g. set to 0), so |
| * make sure to simply try all if V4L2_CTRL_FLAG_NEXT_CTRL not supported */ |
| if (next) |
| n = control.id; |
| if (control.flags & V4L2_CTRL_FLAG_DISABLED) { |
| GST_DEBUG_OBJECT (e, "skipping disabled control"); |
| continue; |
| } |
| |
| if (control.type == V4L2_CTRL_TYPE_CTRL_CLASS) { |
| GST_DEBUG_OBJECT (e, "starting control class '%s'", control.name); |
| continue; |
| } |
| |
| switch (control.type) { |
| case V4L2_CTRL_TYPE_INTEGER: |
| case V4L2_CTRL_TYPE_BOOLEAN: |
| case V4L2_CTRL_TYPE_MENU: |
| case V4L2_CTRL_TYPE_INTEGER_MENU: |
| case V4L2_CTRL_TYPE_BITMASK: |
| case V4L2_CTRL_TYPE_BUTTON:{ |
| control.name[31] = '\0'; |
| gst_v4l2_normalise_control_name ((gchar *) control.name); |
| g_datalist_id_set_data (&v4l2object->controls, |
| g_quark_from_string ((const gchar *) control.name), |
| GINT_TO_POINTER (n)); |
| break; |
| } |
| default: |
| GST_DEBUG_OBJECT (e, |
| "Control type for '%s' not suppored for extra controls.", |
| control.name); |
| break; |
| } |
| |
| switch (n) { |
| case V4L2_CID_BRIGHTNESS: |
| case V4L2_CID_CONTRAST: |
| case V4L2_CID_SATURATION: |
| case V4L2_CID_HUE: |
| case V4L2_CID_BLACK_LEVEL: |
| case V4L2_CID_AUTO_WHITE_BALANCE: |
| case V4L2_CID_DO_WHITE_BALANCE: |
| case V4L2_CID_RED_BALANCE: |
| case V4L2_CID_BLUE_BALANCE: |
| case V4L2_CID_GAMMA: |
| case V4L2_CID_EXPOSURE: |
| case V4L2_CID_AUTOGAIN: |
| case V4L2_CID_GAIN: |
| case V4L2_CID_SHARPNESS: |
| /* we only handle these for now (why?) */ |
| break; |
| case V4L2_CID_HFLIP: |
| case V4L2_CID_VFLIP: |
| case V4L2_CID_PAN_RESET: |
| case V4L2_CID_TILT_RESET: |
| /* not handled here, handled by VideoOrientation interface */ |
| control.id++; |
| break; |
| case V4L2_CID_AUDIO_VOLUME: |
| case V4L2_CID_AUDIO_BALANCE: |
| case V4L2_CID_AUDIO_BASS: |
| case V4L2_CID_AUDIO_TREBLE: |
| case V4L2_CID_AUDIO_MUTE: |
| case V4L2_CID_AUDIO_LOUDNESS: |
| /* FIXME: We should implement GstMixer interface instead */ |
| /* but let's not be pedantic and make element more useful for now */ |
| break; |
| case V4L2_CID_ALPHA_COMPONENT: |
| v4l2object->has_alpha_component = TRUE; |
| break; |
| default: |
| GST_DEBUG_OBJECT (e, |
| "ControlID %s (%x) unhandled, FIXME", control.name, n); |
| control.id++; |
| break; |
| } |
| if (n != control.id) |
| continue; |
| |
| GST_DEBUG_OBJECT (e, "Adding ControlID %s (%x)", control.name, n); |
| v4l2channel = g_object_new (GST_TYPE_V4L2_COLOR_BALANCE_CHANNEL, NULL); |
| channel = GST_COLOR_BALANCE_CHANNEL (v4l2channel); |
| channel->label = g_strdup ((const gchar *) control.name); |
| v4l2channel->id = n; |
| |
| #if 0 |
| /* FIXME: it will be need just when handling private controls |
| *(currently none of base controls are of this type) */ |
| if (control.type == V4L2_CTRL_TYPE_MENU) { |
| struct v4l2_querymenu menu, *mptr; |
| |
| int i; |
| |
| menu.id = n; |
| for (i = 0;; i++) { |
| menu.index = i; |
| if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_QUERYMENU, |
| &menu) < 0) { |
| if (errno == EINVAL) |
| break; /* end of enumeration */ |
| else { |
| GST_ELEMENT_ERROR (e, RESOURCE, SETTINGS, |
| (_("Failed getting controls attributes on device '%s'."), |
| v4l2object->videodev), |
| ("Failed to get %d in menu enumeration for %s. (%d - %s)", |
| n, v4l2object->videodev, errno, strerror (errno))); |
| return FALSE; |
| } |
| } |
| mptr = g_malloc (sizeof (menu)); |
| memcpy (mptr, &menu, sizeof (menu)); |
| menus = g_list_append (menus, mptr); |
| } |
| } |
| v4l2object->menus = g_list_append (v4l2object->menus, menus); |
| #endif |
| |
| switch (control.type) { |
| case V4L2_CTRL_TYPE_INTEGER: |
| channel->min_value = control.minimum; |
| channel->max_value = control.maximum; |
| break; |
| case V4L2_CTRL_TYPE_BOOLEAN: |
| channel->min_value = FALSE; |
| channel->max_value = TRUE; |
| break; |
| default: |
| /* FIXME we should find out how to handle V4L2_CTRL_TYPE_BUTTON. |
| BUTTON controls like V4L2_CID_DO_WHITE_BALANCE can just be set (1) or |
| unset (0), but can't be queried */ |
| GST_DEBUG_OBJECT (e, |
| "Control with non supported type %s (%x), type=%d", |
| control.name, n, control.type); |
| channel->min_value = channel->max_value = 0; |
| break; |
| } |
| |
| v4l2object->colors = |
| g_list_prepend (v4l2object->colors, (gpointer) channel); |
| } |
| v4l2object->colors = g_list_reverse (v4l2object->colors); |
| |
| GST_DEBUG_OBJECT (e, "done"); |
| return TRUE; |
| } |
| |
| |
| static void |
| gst_v4l2_empty_lists (GstV4l2Object * v4l2object) |
| { |
| GST_DEBUG_OBJECT (v4l2object->dbg_obj, "deleting enumerations"); |
| |
| g_list_foreach (v4l2object->channels, (GFunc) g_object_unref, NULL); |
| g_list_free (v4l2object->channels); |
| v4l2object->channels = NULL; |
| |
| g_list_foreach (v4l2object->norms, (GFunc) g_object_unref, NULL); |
| g_list_free (v4l2object->norms); |
| v4l2object->norms = NULL; |
| |
| g_list_foreach (v4l2object->colors, (GFunc) g_object_unref, NULL); |
| g_list_free (v4l2object->colors); |
| v4l2object->colors = NULL; |
| |
| g_datalist_clear (&v4l2object->controls); |
| } |
| |
| static void |
| gst_v4l2_adjust_buf_type (GstV4l2Object * v4l2object) |
| { |
| /* when calling gst_v4l2_object_new the user decides the initial type |
| * so adjust it if multi-planar is supported |
| * the driver should make it exclusive. So the driver should |
| * not support both MPLANE and non-PLANE. |
| * Because even when using MPLANE it still possibles to use it |
| * in a contiguous manner. In this case the first v4l2 plane |
| * contains all the gst planes. |
| */ |
| switch (v4l2object->type) { |
| case V4L2_BUF_TYPE_VIDEO_OUTPUT: |
| if (v4l2object->device_caps & |
| (V4L2_CAP_VIDEO_OUTPUT_MPLANE | V4L2_CAP_VIDEO_M2M_MPLANE)) { |
| GST_DEBUG ("adjust type to multi-planar output"); |
| v4l2object->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE; |
| } |
| break; |
| case V4L2_BUF_TYPE_VIDEO_CAPTURE: |
| if (v4l2object->device_caps & |
| (V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_M2M_MPLANE)) { |
| GST_DEBUG ("adjust type to multi-planar capture"); |
| v4l2object->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| |
| gboolean |
| gst_v4l2_subscribe_event (GstV4l2Object * v4l2object) |
| { |
| GstElement *e; |
| struct v4l2_event_subscription sub; |
| |
| e = v4l2object->element; |
| |
| GST_DEBUG_OBJECT (e, "subscribe event"); |
| |
| if (!GST_V4L2_IS_OPEN (v4l2object)) |
| return FALSE; |
| |
| memset(&sub, 0, sizeof(struct v4l2_event_subscription)); |
| sub.type = V4L2_EVENT_SOURCE_CHANGE; |
| if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_SUBSCRIBE_EVENT, &sub) < 0) |
| goto failed; |
| |
| sub.type = V4L2_EVENT_EOS; |
| if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_SUBSCRIBE_EVENT, &sub) < 0) |
| goto failed; |
| |
| v4l2object->can_wait_event = TRUE; |
| |
| return TRUE; |
| |
| /* ERRORS */ |
| failed: |
| { |
| GST_WARNING_OBJECT (e, "Cannot subscribe V4L2_EVENT_SOURCE_CHANGE or " |
| "V4L2_EVENT_EOS event for device '%s'.", |
| v4l2object->videodev); |
| return TRUE; |
| } |
| } |
| |
| /****************************************************** |
| * gst_v4l2_open(): |
| * open the video device (v4l2object->videodev) |
| * return value: TRUE on success, FALSE on error |
| ******************************************************/ |
| gboolean |
| gst_v4l2_open (GstV4l2Object * v4l2object) |
| { |
| struct stat st; |
| int libv4l2_fd = -1; |
| |
| GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Trying to open device %s", |
| v4l2object->videodev); |
| |
| GST_V4L2_CHECK_NOT_OPEN (v4l2object); |
| GST_V4L2_CHECK_NOT_ACTIVE (v4l2object); |
| |
| /* be sure we have a device */ |
| if (!v4l2object->videodev) |
| v4l2object->videodev = g_strdup ("/dev/video"); |
| |
| /* check if it is a device */ |
| if (stat (v4l2object->videodev, &st) == -1) |
| goto stat_failed; |
| |
| if (!S_ISCHR (st.st_mode)) |
| goto no_device; |
| |
| /* open the device */ |
| v4l2object->video_fd = |
| open (v4l2object->videodev, O_RDWR /* | O_NONBLOCK */ ); |
| |
| if (!GST_V4L2_IS_OPEN (v4l2object)) |
| goto not_open; |
| |
| #ifdef HAVE_LIBV4L2 |
| if (v4l2object->fd_open) |
| libv4l2_fd = v4l2object->fd_open (v4l2object->video_fd, |
| V4L2_ENABLE_ENUM_FMT_EMULATION); |
| #endif |
| |
| /* Note the v4l2_xxx functions are designed so that if they get passed an |
| unknown fd, the will behave exactly as their regular xxx counterparts, so |
| if v4l2_fd_open fails, we continue as normal (missing the libv4l2 custom |
| cam format to normal formats conversion). Chances are big we will still |
| fail then though, as normally v4l2_fd_open only fails if the device is not |
| a v4l2 device. */ |
| if (libv4l2_fd != -1) |
| v4l2object->video_fd = libv4l2_fd; |
| |
| /* get capabilities, error will be posted */ |
| if (!gst_v4l2_get_capabilities (v4l2object)) |
| goto error; |
| |
| /* do we need to be a capture device? */ |
| if (GST_IS_V4L2SRC (v4l2object->element) && |
| !(v4l2object->device_caps & (V4L2_CAP_VIDEO_CAPTURE | |
| V4L2_CAP_VIDEO_CAPTURE_MPLANE))) |
| goto not_capture; |
| |
| if (GST_IS_V4L2SINK (v4l2object->element) && |
| !(v4l2object->device_caps & (V4L2_CAP_VIDEO_OUTPUT | |
| V4L2_CAP_VIDEO_OUTPUT_MPLANE))) |
| goto not_output; |
| |
| if (GST_IS_V4L2_VIDEO_DEC (v4l2object->element) && |
| !GST_V4L2_IS_M2M (v4l2object->device_caps)) |
| goto not_m2m; |
| |
| gst_v4l2_adjust_buf_type (v4l2object); |
| |
| /* create enumerations, posts errors. */ |
| if (!gst_v4l2_fill_lists (v4l2object)) |
| goto error; |
| |
| GST_INFO_OBJECT (v4l2object->dbg_obj, |
| "Opened device '%s' (%s) successfully", |
| v4l2object->vcap.card, v4l2object->videodev); |
| |
| if (v4l2object->extra_controls) |
| gst_v4l2_set_controls (v4l2object, v4l2object->extra_controls); |
| |
| gst_v4l2_subscribe_event (v4l2object); |
| |
| /* UVC devices are never interlaced, and doing VIDIOC_TRY_FMT on them |
| * causes expensive and slow USB IO, so don't probe them for interlaced |
| */ |
| if (!strcmp ((char *) v4l2object->vcap.driver, "uvcusb") || |
| !strcmp ((char *) v4l2object->vcap.driver, "uvcvideo")) { |
| v4l2object->never_interlaced = TRUE; |
| } |
| |
| return TRUE; |
| |
| /* ERRORS */ |
| stat_failed: |
| { |
| GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, NOT_FOUND, |
| (_("Cannot identify device '%s'."), v4l2object->videodev), |
| GST_ERROR_SYSTEM); |
| goto error; |
| } |
| no_device: |
| { |
| GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, NOT_FOUND, |
| (_("This isn't a device '%s'."), v4l2object->videodev), |
| GST_ERROR_SYSTEM); |
| goto error; |
| } |
| not_open: |
| { |
| GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, OPEN_READ_WRITE, |
| (_("Could not open device '%s' for reading and writing."), |
| v4l2object->videodev), GST_ERROR_SYSTEM); |
| goto error; |
| } |
| not_capture: |
| { |
| GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, NOT_FOUND, |
| (_("Device '%s' is not a capture device."), |
| v4l2object->videodev), |
| ("Capabilities: 0x%x", v4l2object->device_caps)); |
| goto error; |
| } |
| not_output: |
| { |
| GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, NOT_FOUND, |
| (_("Device '%s' is not a output device."), |
| v4l2object->videodev), |
| ("Capabilities: 0x%x", v4l2object->device_caps)); |
| goto error; |
| } |
| not_m2m: |
| { |
| GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, NOT_FOUND, |
| (_("Device '%s' is not a M2M device."), |
| v4l2object->videodev), |
| ("Capabilities: 0x%x", v4l2object->device_caps)); |
| goto error; |
| } |
| error: |
| { |
| if (GST_V4L2_IS_OPEN (v4l2object)) { |
| /* close device */ |
| v4l2object->close (v4l2object->video_fd); |
| v4l2object->video_fd = -1; |
| } |
| /* empty lists */ |
| gst_v4l2_empty_lists (v4l2object); |
| |
| return FALSE; |
| } |
| } |
| |
| gboolean |
| gst_v4l2_dup (GstV4l2Object * v4l2object, GstV4l2Object * other) |
| { |
| GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Trying to dup device %s", |
| other->videodev); |
| |
| GST_V4L2_CHECK_OPEN (other); |
| GST_V4L2_CHECK_NOT_OPEN (v4l2object); |
| GST_V4L2_CHECK_NOT_ACTIVE (other); |
| GST_V4L2_CHECK_NOT_ACTIVE (v4l2object); |
| |
| v4l2object->vcap = other->vcap; |
| v4l2object->device_caps = other->device_caps; |
| gst_v4l2_adjust_buf_type (v4l2object); |
| |
| v4l2object->video_fd = v4l2object->dup (other->video_fd); |
| if (!GST_V4L2_IS_OPEN (v4l2object)) |
| goto not_open; |
| |
| g_free (v4l2object->videodev); |
| v4l2object->videodev = g_strdup (other->videodev); |
| |
| GST_INFO_OBJECT (v4l2object->dbg_obj, |
| "Cloned device '%s' (%s) successfully", |
| v4l2object->vcap.card, v4l2object->videodev); |
| |
| v4l2object->never_interlaced = other->never_interlaced; |
| v4l2object->no_initial_format = other->no_initial_format; |
| v4l2object->can_wait_event = other->can_wait_event; |
| |
| return TRUE; |
| |
| not_open: |
| { |
| GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, OPEN_READ_WRITE, |
| (_("Could not dup device '%s' for reading and writing."), |
| v4l2object->videodev), GST_ERROR_SYSTEM); |
| |
| return FALSE; |
| } |
| } |
| |
| |
| /****************************************************** |
| * gst_v4l2_close(): |
| * close the video device (v4l2object->video_fd) |
| * return value: TRUE on success, FALSE on error |
| ******************************************************/ |
| gboolean |
| gst_v4l2_close (GstV4l2Object * v4l2object) |
| { |
| GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Trying to close %s", |
| v4l2object->videodev); |
| |
| GST_V4L2_CHECK_OPEN (v4l2object); |
| GST_V4L2_CHECK_NOT_ACTIVE (v4l2object); |
| |
| /* close device */ |
| v4l2object->close (v4l2object->video_fd); |
| v4l2object->video_fd = -1; |
| |
| /* empty lists */ |
| gst_v4l2_empty_lists (v4l2object); |
| |
| return TRUE; |
| } |
| |
| |
| /****************************************************** |
| * gst_v4l2_get_norm() |
| * Get the norm of the current device |
| * return value: TRUE on success, FALSE on error |
| ******************************************************/ |
| gboolean |
| gst_v4l2_get_norm (GstV4l2Object * v4l2object, v4l2_std_id * norm) |
| { |
| GST_DEBUG_OBJECT (v4l2object->dbg_obj, "getting norm"); |
| |
| if (!GST_V4L2_IS_OPEN (v4l2object)) |
| return FALSE; |
| |
| if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_STD, norm) < 0) |
| goto std_failed; |
| |
| return TRUE; |
| |
| /* ERRORS */ |
| std_failed: |
| { |
| GST_DEBUG ("Failed to get the current norm for device %s", |
| v4l2object->videodev); |
| return FALSE; |
| } |
| } |
| |
| |
| /****************************************************** |
| * gst_v4l2_set_norm() |
| * Set the norm of the current device |
| * return value: TRUE on success, FALSE on error |
| ******************************************************/ |
| gboolean |
| gst_v4l2_set_norm (GstV4l2Object * v4l2object, v4l2_std_id norm) |
| { |
| GST_DEBUG_OBJECT (v4l2object->dbg_obj, "trying to set norm to " |
| "%" G_GINT64_MODIFIER "x", (guint64) norm); |
| |
| if (!GST_V4L2_IS_OPEN (v4l2object)) |
| return FALSE; |
| |
| if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_S_STD, &norm) < 0) |
| goto std_failed; |
| |
| return TRUE; |
| |
| /* ERRORS */ |
| std_failed: |
| { |
| GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS, |
| (_("Failed to set norm for device '%s'."), |
| v4l2object->videodev), GST_ERROR_SYSTEM); |
| return FALSE; |
| } |
| } |
| |
| /****************************************************** |
| * gst_v4l2_get_frequency(): |
| * get the current frequency |
| * return value: TRUE on success, FALSE on error |
| ******************************************************/ |
| gboolean |
| gst_v4l2_get_frequency (GstV4l2Object * v4l2object, |
| gint tunernum, gulong * frequency) |
| { |
| struct v4l2_frequency freq = { 0, }; |
| |
| GstTunerChannel *channel; |
| |
| GST_DEBUG_OBJECT (v4l2object->dbg_obj, "getting current tuner frequency"); |
| |
| if (!GST_V4L2_IS_OPEN (v4l2object)) |
| return FALSE; |
| |
| channel = gst_tuner_get_channel (GST_TUNER (v4l2object->element)); |
| |
| freq.tuner = tunernum; |
| if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_FREQUENCY, &freq) < 0) |
| goto freq_failed; |
| |
| *frequency = freq.frequency * channel->freq_multiplicator; |
| |
| return TRUE; |
| |
| /* ERRORS */ |
| freq_failed: |
| { |
| GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS, |
| (_("Failed to get current tuner frequency for device '%s'."), |
| v4l2object->videodev), GST_ERROR_SYSTEM); |
| return FALSE; |
| } |
| } |
| |
| |
| /****************************************************** |
| * gst_v4l2_set_frequency(): |
| * set frequency |
| * return value: TRUE on success, FALSE on error |
| ******************************************************/ |
| gboolean |
| gst_v4l2_set_frequency (GstV4l2Object * v4l2object, |
| gint tunernum, gulong frequency) |
| { |
| struct v4l2_frequency freq = { 0, }; |
| |
| GstTunerChannel *channel; |
| |
| GST_DEBUG_OBJECT (v4l2object->dbg_obj, |
| "setting current tuner frequency to %lu", frequency); |
| |
| if (!GST_V4L2_IS_OPEN (v4l2object)) |
| return FALSE; |
| |
| channel = gst_tuner_get_channel (GST_TUNER (v4l2object->element)); |
| |
| freq.tuner = tunernum; |
| /* fill in type - ignore error */ |
| (void) v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_FREQUENCY, &freq); |
| freq.frequency = frequency / channel->freq_multiplicator; |
| |
| if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_S_FREQUENCY, &freq) < 0) |
| goto freq_failed; |
| |
| return TRUE; |
| |
| /* ERRORS */ |
| freq_failed: |
| { |
| GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS, |
| (_("Failed to set current tuner frequency for device '%s' to %lu Hz."), |
| v4l2object->videodev, frequency), GST_ERROR_SYSTEM); |
| return FALSE; |
| } |
| } |
| |
| /****************************************************** |
| * gst_v4l2_signal_strength(): |
| * get the strength of the signal on the current input |
| * return value: TRUE on success, FALSE on error |
| ******************************************************/ |
| gboolean |
| gst_v4l2_signal_strength (GstV4l2Object * v4l2object, |
| gint tunernum, gulong * signal_strength) |
| { |
| struct v4l2_tuner tuner = { 0, }; |
| |
| GST_DEBUG_OBJECT (v4l2object->dbg_obj, "trying to get signal strength"); |
| |
| if (!GST_V4L2_IS_OPEN (v4l2object)) |
| return FALSE; |
| |
| tuner.index = tunernum; |
| if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_TUNER, &tuner) < 0) |
| goto tuner_failed; |
| |
| *signal_strength = tuner.signal; |
| |
| return TRUE; |
| |
| /* ERRORS */ |
| tuner_failed: |
| { |
| GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS, |
| (_("Failed to get signal strength for device '%s'."), |
| v4l2object->videodev), GST_ERROR_SYSTEM); |
| return FALSE; |
| } |
| } |
| |
| /****************************************************** |
| * gst_v4l2_get_attribute(): |
| * try to get the value of one specific attribute |
| * return value: TRUE on success, FALSE on error |
| ******************************************************/ |
| gboolean |
| gst_v4l2_get_attribute (GstV4l2Object * v4l2object, |
| int attribute_num, int *value) |
| { |
| struct v4l2_control control = { 0, }; |
| |
| GST_DEBUG_OBJECT (v4l2object->dbg_obj, "getting value of attribute %d", |
| attribute_num); |
| |
| if (!GST_V4L2_IS_OPEN (v4l2object)) |
| return FALSE; |
| |
| control.id = attribute_num; |
| |
| if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CTRL, &control) < 0) |
| goto ctrl_failed; |
| |
| *value = control.value; |
| |
| return TRUE; |
| |
| /* ERRORS */ |
| ctrl_failed: |
| { |
| GST_WARNING_OBJECT (v4l2object, |
| _("Failed to get value for control %d on device '%s'."), |
| attribute_num, v4l2object->videodev); |
| return FALSE; |
| } |
| } |
| |
| |
| /****************************************************** |
| * gst_v4l2_set_attribute(): |
| * try to set the value of one specific attribute |
| * return value: TRUE on success, FALSE on error |
| ******************************************************/ |
| gboolean |
| gst_v4l2_set_attribute (GstV4l2Object * v4l2object, |
| int attribute_num, const int value) |
| { |
| struct v4l2_control control = { 0, }; |
| |
| GST_DEBUG_OBJECT (v4l2object->dbg_obj, "setting value of attribute %d to %d", |
| attribute_num, value); |
| |
| if (!GST_V4L2_IS_OPEN (v4l2object)) |
| return FALSE; |
| |
| control.id = attribute_num; |
| control.value = value; |
| if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_S_CTRL, &control) < 0) |
| goto ctrl_failed; |
| |
| return TRUE; |
| |
| /* ERRORS */ |
| ctrl_failed: |
| { |
| GST_WARNING_OBJECT (v4l2object, |
| _("Failed to set value %d for control %d on device '%s'."), |
| value, attribute_num, v4l2object->videodev); |
| return FALSE; |
| } |
| } |
| |
| static gboolean |
| set_control (GQuark field_id, const GValue * value, gpointer user_data) |
| { |
| GstV4l2Object *v4l2object = user_data; |
| GQuark normalised_field_id; |
| gpointer *d; |
| |
| /* 32 bytes is the maximum size for a control name according to v4l2 */ |
| gchar name[32]; |
| |
| /* Backwards compatibility: in the past GStreamer would normalise strings in |
| a subtly different way to v4l2-ctl. e.g. the kernel's "Focus (absolute)" |
| would become "focus__absolute_" whereas now it becomes "focus_absolute". |
| Please remove the following in GStreamer 1.5 for 1.6 */ |
| strncpy (name, g_quark_to_string (field_id), sizeof (name)); |
| name[31] = '\0'; |
| gst_v4l2_normalise_control_name (name); |
| normalised_field_id = g_quark_from_string (name); |
| if (normalised_field_id != field_id) |
| g_warning ("In GStreamer 1.4 the way V4L2 control names were normalised " |
| "changed. Instead of setting \"%s\" please use \"%s\". The former is " |
| "deprecated and will be removed in a future version of GStreamer", |
| g_quark_to_string (field_id), name); |
| field_id = normalised_field_id; |
| |
| d = g_datalist_id_get_data (&v4l2object->controls, field_id); |
| if (!d) { |
| GST_WARNING_OBJECT (v4l2object, |
| "Control '%s' does not exist or has an unsupported type.", |
| g_quark_to_string (field_id)); |
| return TRUE; |
| } |
| if (!G_VALUE_HOLDS (value, G_TYPE_INT)) { |
| GST_WARNING_OBJECT (v4l2object, |
| "'int' value expected for control '%s'.", g_quark_to_string (field_id)); |
| return TRUE; |
| } |
| gst_v4l2_set_attribute (v4l2object, GPOINTER_TO_INT (d), |
| g_value_get_int (value)); |
| return TRUE; |
| } |
| |
| gboolean |
| gst_v4l2_set_controls (GstV4l2Object * v4l2object, GstStructure * controls) |
| { |
| return gst_structure_foreach (controls, set_control, v4l2object); |
| } |
| |
| gboolean |
| gst_v4l2_get_input (GstV4l2Object * v4l2object, gint * input) |
| { |
| gint n; |
| |
| GST_DEBUG_OBJECT (v4l2object->dbg_obj, "trying to get input"); |
| |
| if (!GST_V4L2_IS_OPEN (v4l2object)) |
| return FALSE; |
| |
| if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_INPUT, &n) < 0) |
| goto input_failed; |
| |
| *input = n; |
| |
| GST_DEBUG_OBJECT (v4l2object->dbg_obj, "input: %d", n); |
| |
| return TRUE; |
| |
| /* ERRORS */ |
| input_failed: |
| if (v4l2object->device_caps & V4L2_CAP_TUNER) { |
| /* only give a warning message if driver actually claims to have tuner |
| * support |
| */ |
| GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS, |
| (_("Failed to get current input on device '%s'. May be it is a radio device"), v4l2object->videodev), GST_ERROR_SYSTEM); |
| } |
| return FALSE; |
| } |
| |
| gboolean |
| gst_v4l2_set_input (GstV4l2Object * v4l2object, gint input) |
| { |
| GST_DEBUG_OBJECT (v4l2object->dbg_obj, "trying to set input to %d", input); |
| |
| if (!GST_V4L2_IS_OPEN (v4l2object)) |
| return FALSE; |
| |
| if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_S_INPUT, &input) < 0) |
| goto input_failed; |
| |
| return TRUE; |
| |
| /* ERRORS */ |
| input_failed: |
| if (v4l2object->device_caps & V4L2_CAP_TUNER) { |
| /* only give a warning message if driver actually claims to have tuner |
| * support |
| */ |
| GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS, |
| (_("Failed to set input %d on device %s."), |
| input, v4l2object->videodev), GST_ERROR_SYSTEM); |
| } |
| return FALSE; |
| } |
| |
| gboolean |
| gst_v4l2_get_output (GstV4l2Object * v4l2object, gint * output) |
| { |
| gint n; |
| |
| GST_DEBUG_OBJECT (v4l2object->dbg_obj, "trying to get output"); |
| |
| if (!GST_V4L2_IS_OPEN (v4l2object)) |
| return FALSE; |
| |
| if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_OUTPUT, &n) < 0) |
| goto output_failed; |
| |
| *output = n; |
| |
| GST_DEBUG_OBJECT (v4l2object->dbg_obj, "output: %d", n); |
| |
| return TRUE; |
| |
| /* ERRORS */ |
| output_failed: |
| if (v4l2object->device_caps & V4L2_CAP_TUNER) { |
| /* only give a warning message if driver actually claims to have tuner |
| * support |
| */ |
| GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS, |
| (_("Failed to get current output on device '%s'. May be it is a radio device"), v4l2object->videodev), GST_ERROR_SYSTEM); |
| } |
| return FALSE; |
| } |
| |
| gboolean |
| gst_v4l2_set_output (GstV4l2Object * v4l2object, gint output) |
| { |
| GST_DEBUG_OBJECT (v4l2object->dbg_obj, "trying to set output to %d", output); |
| |
| if (!GST_V4L2_IS_OPEN (v4l2object)) |
| return FALSE; |
| |
| if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_S_OUTPUT, &output) < 0) |
| goto output_failed; |
| |
| return TRUE; |
| |
| /* ERRORS */ |
| output_failed: |
| if (v4l2object->device_caps & V4L2_CAP_TUNER) { |
| /* only give a warning message if driver actually claims to have tuner |
| * support |
| */ |
| GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS, |
| (_("Failed to set output %d on device %s."), |
| output, v4l2object->videodev), GST_ERROR_SYSTEM); |
| } |
| return FALSE; |
| } |