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gstreamer/subprojects/gst-plugins-good/sys/v4l2/gstv4l2object.c
Nicolas Dufresne 45b949fb24 v4l2object: Avoid crash on early failure 
This happens while an external error lead to an early shutdown.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1991>
2022-03-18 20:55:29 +00:00

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/* GStreamer
*
* Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
* 2006 Edgard Lima <edgard.lima@gmail.com>
*
* gstv4l2object.c: base class for V4L2 elements
*
* 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/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#ifdef HAVE_GUDEV
#include <gudev/gudev.h>
#endif
#include "ext/videodev2.h"
#include "gstv4l2object.h"
#include "gstv4l2tuner.h"
#include "gstv4l2colorbalance.h"
#include "gst/gst-i18n-plugin.h"
#include <gst/video/video.h>
#include <gst/allocators/gstdmabuf.h>
GST_DEBUG_CATEGORY_EXTERN (v4l2_debug);
#define GST_CAT_DEFAULT v4l2_debug
#define DEFAULT_PROP_DEVICE_NAME NULL
#define DEFAULT_PROP_DEVICE_FD -1
#define DEFAULT_PROP_FLAGS 0
#define DEFAULT_PROP_TV_NORM 0
#define DEFAULT_PROP_IO_MODE GST_V4L2_IO_AUTO
#define ENCODED_BUFFER_SIZE (2 * 1024 * 1024)
enum
{
PROP_0,
V4L2_STD_OBJECT_PROPS,
};
/*
* common format / caps utilities:
*/
typedef enum
{
GST_V4L2_RAW = 1 << 0,
GST_V4L2_CODEC = 1 << 1,
GST_V4L2_TRANSPORT = 1 << 2,
GST_V4L2_NO_PARSE = 1 << 3,
GST_V4L2_ALL = 0xffff
} GstV4L2FormatFlags;
typedef struct
{
guint32 format;
gboolean dimensions;
GstV4L2FormatFlags flags;
} GstV4L2FormatDesc;
static const GstV4L2FormatDesc gst_v4l2_formats[] = {
/* RGB formats */
{V4L2_PIX_FMT_RGB332, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_ARGB555, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_XRGB555, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_ARGB555X, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_XRGB555X, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_RGB565, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_RGB565X, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_BGR666, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_BGR24, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_RGB24, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_ABGR32, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_XBGR32, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_BGRA32, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_BGRX32, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_RGBA32, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_RGBX32, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_ARGB32, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_XRGB32, TRUE, GST_V4L2_RAW},
/* Deprecated Packed RGB Image Formats (alpha ambiguity) */
{V4L2_PIX_FMT_RGB444, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_RGB555, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_RGB555X, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_BGR32, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_RGB32, TRUE, GST_V4L2_RAW},
/* Grey formats */
{V4L2_PIX_FMT_GREY, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_Y4, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_Y6, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_Y10, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_Y12, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_Y16, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_Y16_BE, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_Y10BPACK, TRUE, GST_V4L2_RAW},
/* Palette formats */
{V4L2_PIX_FMT_PAL8, TRUE, GST_V4L2_RAW},
/* Chrominance formats */
{V4L2_PIX_FMT_UV8, TRUE, GST_V4L2_RAW},
/* Luminance+Chrominance formats */
{V4L2_PIX_FMT_YVU410, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_YVU420, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_YVU420M, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_YUYV, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_YYUV, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_YVYU, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_UYVY, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_VYUY, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_YUV422P, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_YUV411P, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_Y41P, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_YUV444, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_YUV555, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_YUV565, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_YUV32, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_YUV410, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_YUV420, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_YUV420M, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_HI240, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_HM12, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_M420, TRUE, GST_V4L2_RAW},
/* two planes -- one Y, one Cr + Cb interleaved */
{V4L2_PIX_FMT_NV12, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_NV12M, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_NV12MT, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_NV12MT_16X16, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_NV21, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_NV21M, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_NV16, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_NV16M, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_NV61, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_NV61M, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_NV24, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_NV42, TRUE, GST_V4L2_RAW},
/* Bayer formats - see http://www.siliconimaging.com/RGB%20Bayer.htm */
{V4L2_PIX_FMT_SBGGR8, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_SGBRG8, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_SGRBG8, TRUE, GST_V4L2_RAW},
{V4L2_PIX_FMT_SRGGB8, TRUE, GST_V4L2_RAW},
/* compressed formats */
{V4L2_PIX_FMT_MJPEG, FALSE, GST_V4L2_CODEC},
{V4L2_PIX_FMT_JPEG, FALSE, GST_V4L2_CODEC},
{V4L2_PIX_FMT_PJPG, FALSE, GST_V4L2_CODEC},
{V4L2_PIX_FMT_DV, FALSE, GST_V4L2_TRANSPORT},
{V4L2_PIX_FMT_MPEG, FALSE, GST_V4L2_TRANSPORT},
{V4L2_PIX_FMT_FWHT, FALSE, GST_V4L2_CODEC},
{V4L2_PIX_FMT_H264, FALSE, GST_V4L2_CODEC},
{V4L2_PIX_FMT_H264_NO_SC, FALSE, GST_V4L2_CODEC},
{V4L2_PIX_FMT_H264_MVC, FALSE, GST_V4L2_CODEC},
{V4L2_PIX_FMT_HEVC, FALSE, GST_V4L2_CODEC},
{V4L2_PIX_FMT_H263, FALSE, GST_V4L2_CODEC},
{V4L2_PIX_FMT_MPEG1, FALSE, GST_V4L2_CODEC},
{V4L2_PIX_FMT_MPEG2, FALSE, GST_V4L2_CODEC},
{V4L2_PIX_FMT_MPEG4, FALSE, GST_V4L2_CODEC},
{V4L2_PIX_FMT_XVID, FALSE, GST_V4L2_CODEC},
{V4L2_PIX_FMT_VC1_ANNEX_G, FALSE, GST_V4L2_CODEC},
{V4L2_PIX_FMT_VC1_ANNEX_L, FALSE, GST_V4L2_CODEC},
{V4L2_PIX_FMT_VP8, FALSE, GST_V4L2_CODEC | GST_V4L2_NO_PARSE},
{V4L2_PIX_FMT_VP9, FALSE, GST_V4L2_CODEC | GST_V4L2_NO_PARSE},
/* Vendor-specific formats */
{V4L2_PIX_FMT_WNVA, TRUE, GST_V4L2_CODEC},
{V4L2_PIX_FMT_SN9C10X, TRUE, GST_V4L2_CODEC},
{V4L2_PIX_FMT_PWC1, TRUE, GST_V4L2_CODEC},
{V4L2_PIX_FMT_PWC2, TRUE, GST_V4L2_CODEC},
};
#define GST_V4L2_FORMAT_COUNT (G_N_ELEMENTS (gst_v4l2_formats))
static GSList *gst_v4l2_object_get_format_list (GstV4l2Object * v4l2object);
#define GST_TYPE_V4L2_DEVICE_FLAGS (gst_v4l2_device_get_type ())
static GType
gst_v4l2_device_get_type (void)
{
static GType v4l2_device_type = 0;
if (v4l2_device_type == 0) {
static const GFlagsValue values[] = {
{V4L2_CAP_VIDEO_CAPTURE, "Device supports video capture", "capture"},
{V4L2_CAP_VIDEO_OUTPUT, "Device supports video playback", "output"},
{V4L2_CAP_VIDEO_OVERLAY, "Device supports video overlay", "overlay"},
{V4L2_CAP_VBI_CAPTURE, "Device supports the VBI capture", "vbi-capture"},
{V4L2_CAP_VBI_OUTPUT, "Device supports the VBI output", "vbi-output"},
{V4L2_CAP_TUNER, "Device has a tuner or modulator", "tuner"},
{V4L2_CAP_AUDIO, "Device has audio inputs or outputs", "audio"},
{0, NULL, NULL}
};
v4l2_device_type =
g_flags_register_static ("GstV4l2DeviceTypeFlags", values);
}
return v4l2_device_type;
}
#define GST_TYPE_V4L2_TV_NORM (gst_v4l2_tv_norm_get_type ())
static GType
gst_v4l2_tv_norm_get_type (void)
{
static GType v4l2_tv_norm = 0;
if (!v4l2_tv_norm) {
static const GEnumValue tv_norms[] = {
{0, "none", "none"},
{V4L2_STD_NTSC, "NTSC", "NTSC"},
{V4L2_STD_NTSC_M, "NTSC-M", "NTSC-M"},
{V4L2_STD_NTSC_M_JP, "NTSC-M-JP", "NTSC-M-JP"},
{V4L2_STD_NTSC_M_KR, "NTSC-M-KR", "NTSC-M-KR"},
{V4L2_STD_NTSC_443, "NTSC-443", "NTSC-443"},
{V4L2_STD_PAL, "PAL", "PAL"},
{V4L2_STD_PAL_BG, "PAL-BG", "PAL-BG"},
{V4L2_STD_PAL_B, "PAL-B", "PAL-B"},
{V4L2_STD_PAL_B1, "PAL-B1", "PAL-B1"},
{V4L2_STD_PAL_G, "PAL-G", "PAL-G"},
{V4L2_STD_PAL_H, "PAL-H", "PAL-H"},
{V4L2_STD_PAL_I, "PAL-I", "PAL-I"},
{V4L2_STD_PAL_DK, "PAL-DK", "PAL-DK"},
{V4L2_STD_PAL_D, "PAL-D", "PAL-D"},
{V4L2_STD_PAL_D1, "PAL-D1", "PAL-D1"},
{V4L2_STD_PAL_K, "PAL-K", "PAL-K"},
{V4L2_STD_PAL_M, "PAL-M", "PAL-M"},
{V4L2_STD_PAL_N, "PAL-N", "PAL-N"},
{V4L2_STD_PAL_Nc, "PAL-Nc", "PAL-Nc"},
{V4L2_STD_PAL_60, "PAL-60", "PAL-60"},
{V4L2_STD_SECAM, "SECAM", "SECAM"},
{V4L2_STD_SECAM_B, "SECAM-B", "SECAM-B"},
{V4L2_STD_SECAM_G, "SECAM-G", "SECAM-G"},
{V4L2_STD_SECAM_H, "SECAM-H", "SECAM-H"},
{V4L2_STD_SECAM_DK, "SECAM-DK", "SECAM-DK"},
{V4L2_STD_SECAM_D, "SECAM-D", "SECAM-D"},
{V4L2_STD_SECAM_K, "SECAM-K", "SECAM-K"},
{V4L2_STD_SECAM_K1, "SECAM-K1", "SECAM-K1"},
{V4L2_STD_SECAM_L, "SECAM-L", "SECAM-L"},
{V4L2_STD_SECAM_LC, "SECAM-Lc", "SECAM-Lc"},
{0, NULL, NULL}
};
v4l2_tv_norm = g_enum_register_static ("V4L2_TV_norms", tv_norms);
}
return v4l2_tv_norm;
}
GType
gst_v4l2_io_mode_get_type (void)
{
static GType v4l2_io_mode = 0;
if (!v4l2_io_mode) {
static const GEnumValue io_modes[] = {
{GST_V4L2_IO_AUTO, "GST_V4L2_IO_AUTO", "auto"},
{GST_V4L2_IO_RW, "GST_V4L2_IO_RW", "rw"},
{GST_V4L2_IO_MMAP, "GST_V4L2_IO_MMAP", "mmap"},
{GST_V4L2_IO_USERPTR, "GST_V4L2_IO_USERPTR", "userptr"},
{GST_V4L2_IO_DMABUF, "GST_V4L2_IO_DMABUF", "dmabuf"},
{GST_V4L2_IO_DMABUF_IMPORT, "GST_V4L2_IO_DMABUF_IMPORT",
"dmabuf-import"},
{0, NULL, NULL}
};
v4l2_io_mode = g_enum_register_static ("GstV4l2IOMode", io_modes);
}
return v4l2_io_mode;
}
void
gst_v4l2_object_install_properties_helper (GObjectClass * gobject_class,
const char *default_device)
{
g_object_class_install_property (gobject_class, PROP_DEVICE,
g_param_spec_string ("device", "Device", "Device location",
default_device, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_DEVICE_NAME,
g_param_spec_string ("device-name", "Device name",
"Name of the device", DEFAULT_PROP_DEVICE_NAME,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_DEVICE_FD,
g_param_spec_int ("device-fd", "File descriptor",
"File descriptor of the device", -1, G_MAXINT, DEFAULT_PROP_DEVICE_FD,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_FLAGS,
g_param_spec_flags ("flags", "Flags", "Device type flags",
GST_TYPE_V4L2_DEVICE_FLAGS, DEFAULT_PROP_FLAGS,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* GstV4l2Src:brightness:
*
* Picture brightness, or more precisely, the black level
*/
g_object_class_install_property (gobject_class, PROP_BRIGHTNESS,
g_param_spec_int ("brightness", "Brightness",
"Picture brightness, or more precisely, the black level", G_MININT,
G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
/**
* GstV4l2Src:contrast:
*
* Picture contrast or luma gain
*/
g_object_class_install_property (gobject_class, PROP_CONTRAST,
g_param_spec_int ("contrast", "Contrast",
"Picture contrast or luma gain", G_MININT,
G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
/**
* GstV4l2Src:saturation:
*
* Picture color saturation or chroma gain
*/
g_object_class_install_property (gobject_class, PROP_SATURATION,
g_param_spec_int ("saturation", "Saturation",
"Picture color saturation or chroma gain", G_MININT,
G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
/**
* GstV4l2Src:hue:
*
* Hue or color balance
*/
g_object_class_install_property (gobject_class, PROP_HUE,
g_param_spec_int ("hue", "Hue",
"Hue or color balance", G_MININT,
G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
/**
* GstV4l2Src:norm:
*
* TV norm
*/
g_object_class_install_property (gobject_class, PROP_TV_NORM,
g_param_spec_enum ("norm", "TV norm",
"video standard",
GST_TYPE_V4L2_TV_NORM, DEFAULT_PROP_TV_NORM,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstV4l2Src:io-mode:
*
* IO Mode
*/
g_object_class_install_property (gobject_class, PROP_IO_MODE,
g_param_spec_enum ("io-mode", "IO mode",
"I/O mode",
GST_TYPE_V4L2_IO_MODE, DEFAULT_PROP_IO_MODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstV4l2Src:extra-controls:
*
* Additional v4l2 controls for the device. The controls are identified
* by the control name (lowercase with '_' for any non-alphanumeric
* characters).
*
* Since: 1.2
*/
g_object_class_install_property (gobject_class, PROP_EXTRA_CONTROLS,
g_param_spec_boxed ("extra-controls", "Extra Controls",
"Extra v4l2 controls (CIDs) for the device",
GST_TYPE_STRUCTURE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstV4l2Src:pixel-aspect-ratio:
*
* The pixel aspect ratio of the device. This overwrites the pixel aspect
* ratio queried from the device.
*
* Since: 1.2
*/
g_object_class_install_property (gobject_class, PROP_PIXEL_ASPECT_RATIO,
g_param_spec_string ("pixel-aspect-ratio", "Pixel Aspect Ratio",
"Overwrite the pixel aspect ratio of the device", "1/1",
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstV4l2Src:force-aspect-ratio:
*
* When enabled, the pixel aspect ratio queried from the device or set
* with the pixel-aspect-ratio property will be enforced.
*
* Since: 1.2
*/
g_object_class_install_property (gobject_class, PROP_FORCE_ASPECT_RATIO,
g_param_spec_boolean ("force-aspect-ratio", "Force aspect ratio",
"When enabled, the pixel aspect ratio will be enforced", TRUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_type_mark_as_plugin_api (GST_TYPE_V4L2_DEVICE_FLAGS, 0);
gst_type_mark_as_plugin_api (GST_TYPE_V4L2_TV_NORM, 0);
gst_type_mark_as_plugin_api (GST_TYPE_V4L2_IO_MODE, 0);
}
void
gst_v4l2_object_install_m2m_properties_helper (GObjectClass * gobject_class)
{
g_object_class_install_property (gobject_class, PROP_DEVICE,
g_param_spec_string ("device", "Device", "Device location",
NULL, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_DEVICE_NAME,
g_param_spec_string ("device-name", "Device name",
"Name of the device", DEFAULT_PROP_DEVICE_NAME,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_DEVICE_FD,
g_param_spec_int ("device-fd", "File descriptor",
"File descriptor of the device", -1, G_MAXINT, DEFAULT_PROP_DEVICE_FD,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_OUTPUT_IO_MODE,
g_param_spec_enum ("output-io-mode", "Output IO mode",
"Output side I/O mode (matches sink pad)",
GST_TYPE_V4L2_IO_MODE, DEFAULT_PROP_IO_MODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CAPTURE_IO_MODE,
g_param_spec_enum ("capture-io-mode", "Capture IO mode",
"Capture I/O mode (matches src pad)",
GST_TYPE_V4L2_IO_MODE, DEFAULT_PROP_IO_MODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_EXTRA_CONTROLS,
g_param_spec_boxed ("extra-controls", "Extra Controls",
"Extra v4l2 controls (CIDs) for the device",
GST_TYPE_STRUCTURE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
/* Support for 32bit off_t, this wrapper is casting off_t to gint64 */
#ifdef HAVE_LIBV4L2
#if SIZEOF_OFF_T < 8
static gpointer
v4l2_mmap_wrapper (gpointer start, gsize length, gint prot, gint flags, gint fd,
off_t offset)
{
return v4l2_mmap (start, length, prot, flags, fd, (gint64) offset);
}
#define v4l2_mmap v4l2_mmap_wrapper
#endif /* SIZEOF_OFF_T < 8 */
#endif /* HAVE_LIBV4L2 */
GstV4l2Object *
gst_v4l2_object_new (GstElement * element,
GstObject * debug_object,
enum v4l2_buf_type type,
const char *default_device,
GstV4l2GetInOutFunction get_in_out_func,
GstV4l2SetInOutFunction set_in_out_func,
GstV4l2UpdateFpsFunction update_fps_func)
{
GstV4l2Object *v4l2object;
/*
* some default values
*/
v4l2object = g_new0 (GstV4l2Object, 1);
v4l2object->type = type;
v4l2object->formats = NULL;
v4l2object->element = element;
v4l2object->dbg_obj = debug_object;
v4l2object->get_in_out_func = get_in_out_func;
v4l2object->set_in_out_func = set_in_out_func;
v4l2object->update_fps_func = update_fps_func;
v4l2object->video_fd = -1;
v4l2object->active = FALSE;
v4l2object->videodev = g_strdup (default_device);
v4l2object->norms = NULL;
v4l2object->channels = NULL;
v4l2object->colors = NULL;
v4l2object->keep_aspect = TRUE;
v4l2object->n_v4l2_planes = 0;
v4l2object->no_initial_format = FALSE;
/* We now disable libv4l2 by default, but have an env to enable it. */
#ifdef HAVE_LIBV4L2
if (g_getenv ("GST_V4L2_USE_LIBV4L2")) {
v4l2object->fd_open = v4l2_fd_open;
v4l2object->close = v4l2_close;
v4l2object->dup = v4l2_dup;
v4l2object->ioctl = v4l2_ioctl;
v4l2object->read = v4l2_read;
v4l2object->mmap = v4l2_mmap;
v4l2object->munmap = v4l2_munmap;
} else
#endif
{
v4l2object->fd_open = NULL;
v4l2object->close = close;
v4l2object->dup = dup;
v4l2object->ioctl = ioctl;
v4l2object->read = read;
v4l2object->mmap = mmap;
v4l2object->munmap = munmap;
}
return v4l2object;
}
static gboolean gst_v4l2_object_clear_format_list (GstV4l2Object * v4l2object);
void
gst_v4l2_object_destroy (GstV4l2Object * v4l2object)
{
g_return_if_fail (v4l2object != NULL);
g_free (v4l2object->videodev);
g_free (v4l2object->par);
g_free (v4l2object->channel);
if (v4l2object->formats) {
gst_v4l2_object_clear_format_list (v4l2object);
}
if (v4l2object->probed_caps) {
gst_caps_unref (v4l2object->probed_caps);
}
if (v4l2object->extra_controls) {
gst_structure_free (v4l2object->extra_controls);
}
g_free (v4l2object);
}
static gboolean
gst_v4l2_object_clear_format_list (GstV4l2Object * v4l2object)
{
g_slist_foreach (v4l2object->formats, (GFunc) g_free, NULL);
g_slist_free (v4l2object->formats);
v4l2object->formats = NULL;
return TRUE;
}
static gint
gst_v4l2_object_prop_to_cid (guint prop_id)
{
gint cid = -1;
switch (prop_id) {
case PROP_BRIGHTNESS:
cid = V4L2_CID_BRIGHTNESS;
break;
case PROP_CONTRAST:
cid = V4L2_CID_CONTRAST;
break;
case PROP_SATURATION:
cid = V4L2_CID_SATURATION;
break;
case PROP_HUE:
cid = V4L2_CID_HUE;
break;
default:
GST_WARNING ("unmapped property id: %d", prop_id);
}
return cid;
}
gboolean
gst_v4l2_object_set_property_helper (GstV4l2Object * v4l2object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
case PROP_DEVICE:
g_free (v4l2object->videodev);
v4l2object->videodev = g_value_dup_string (value);
break;
case PROP_BRIGHTNESS:
case PROP_CONTRAST:
case PROP_SATURATION:
case PROP_HUE:
{
gint cid = gst_v4l2_object_prop_to_cid (prop_id);
if (cid != -1) {
if (GST_V4L2_IS_OPEN (v4l2object)) {
gst_v4l2_set_attribute (v4l2object, cid, g_value_get_int (value));
}
}
return TRUE;
}
break;
case PROP_TV_NORM:
v4l2object->tv_norm = g_value_get_enum (value);
break;
#if 0
case PROP_CHANNEL:
if (GST_V4L2_IS_OPEN (v4l2object)) {
GstTuner *tuner = GST_TUNER (v4l2object->element);
GstTunerChannel *channel = gst_tuner_find_channel_by_name (tuner,
(gchar *) g_value_get_string (value));
if (channel) {
/* like gst_tuner_set_channel (tuner, channel)
without g_object_notify */
gst_v4l2_tuner_set_channel (v4l2object, channel);
}
} else {
g_free (v4l2object->channel);
v4l2object->channel = g_value_dup_string (value);
}
break;
case PROP_FREQUENCY:
if (GST_V4L2_IS_OPEN (v4l2object)) {
GstTuner *tuner = GST_TUNER (v4l2object->element);
GstTunerChannel *channel = gst_tuner_get_channel (tuner);
if (channel &&
GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
/* like
gst_tuner_set_frequency (tuner, channel, g_value_get_ulong (value))
without g_object_notify */
gst_v4l2_tuner_set_frequency (v4l2object, channel,
g_value_get_ulong (value));
}
} else {
v4l2object->frequency = g_value_get_ulong (value);
}
break;
#endif
case PROP_IO_MODE:
v4l2object->req_mode = g_value_get_enum (value);
break;
case PROP_CAPTURE_IO_MODE:
g_return_val_if_fail (!V4L2_TYPE_IS_OUTPUT (v4l2object->type), FALSE);
v4l2object->req_mode = g_value_get_enum (value);
break;
case PROP_OUTPUT_IO_MODE:
g_return_val_if_fail (V4L2_TYPE_IS_OUTPUT (v4l2object->type), FALSE);
v4l2object->req_mode = g_value_get_enum (value);
break;
case PROP_EXTRA_CONTROLS:{
const GstStructure *s = gst_value_get_structure (value);
if (v4l2object->extra_controls)
gst_structure_free (v4l2object->extra_controls);
v4l2object->extra_controls = s ? gst_structure_copy (s) : NULL;
if (GST_V4L2_IS_OPEN (v4l2object))
gst_v4l2_set_controls (v4l2object, v4l2object->extra_controls);
break;
}
case PROP_PIXEL_ASPECT_RATIO:
if (v4l2object->par) {
g_value_unset (v4l2object->par);
g_free (v4l2object->par);
}
v4l2object->par = g_new0 (GValue, 1);
g_value_init (v4l2object->par, GST_TYPE_FRACTION);
if (!g_value_transform (value, v4l2object->par)) {
g_warning ("Could not transform string to aspect ratio");
gst_value_set_fraction (v4l2object->par, 1, 1);
}
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "set PAR to %d/%d",
gst_value_get_fraction_numerator (v4l2object->par),
gst_value_get_fraction_denominator (v4l2object->par));
break;
case PROP_FORCE_ASPECT_RATIO:
v4l2object->keep_aspect = g_value_get_boolean (value);
break;
default:
return FALSE;
break;
}
return TRUE;
}
gboolean
gst_v4l2_object_get_property_helper (GstV4l2Object * v4l2object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
case PROP_DEVICE:
g_value_set_string (value, v4l2object->videodev);
break;
case PROP_DEVICE_NAME:
{
const guchar *name = NULL;
if (GST_V4L2_IS_OPEN (v4l2object))
name = v4l2object->vcap.card;
g_value_set_string (value, (gchar *) name);
break;
}
case PROP_DEVICE_FD:
{
if (GST_V4L2_IS_OPEN (v4l2object))
g_value_set_int (value, v4l2object->video_fd);
else
g_value_set_int (value, DEFAULT_PROP_DEVICE_FD);
break;
}
case PROP_FLAGS:
{
guint flags = 0;
if (GST_V4L2_IS_OPEN (v4l2object)) {
flags |= v4l2object->device_caps &
(V4L2_CAP_VIDEO_CAPTURE |
V4L2_CAP_VIDEO_OUTPUT |
V4L2_CAP_VIDEO_OVERLAY |
V4L2_CAP_VBI_CAPTURE |
V4L2_CAP_VBI_OUTPUT | V4L2_CAP_TUNER | V4L2_CAP_AUDIO);
if (v4l2object->device_caps & V4L2_CAP_VIDEO_CAPTURE_MPLANE)
flags |= V4L2_CAP_VIDEO_CAPTURE;
if (v4l2object->device_caps & V4L2_CAP_VIDEO_OUTPUT_MPLANE)
flags |= V4L2_CAP_VIDEO_OUTPUT;
}
g_value_set_flags (value, flags);
break;
}
case PROP_BRIGHTNESS:
case PROP_CONTRAST:
case PROP_SATURATION:
case PROP_HUE:
{
gint cid = gst_v4l2_object_prop_to_cid (prop_id);
if (cid != -1) {
if (GST_V4L2_IS_OPEN (v4l2object)) {
gint v;
if (gst_v4l2_get_attribute (v4l2object, cid, &v)) {
g_value_set_int (value, v);
}
}
}
return TRUE;
}
break;
case PROP_TV_NORM:
g_value_set_enum (value, v4l2object->tv_norm);
break;
case PROP_IO_MODE:
g_value_set_enum (value, v4l2object->req_mode);
break;
case PROP_CAPTURE_IO_MODE:
g_return_val_if_fail (!V4L2_TYPE_IS_OUTPUT (v4l2object->type), FALSE);
g_value_set_enum (value, v4l2object->req_mode);
break;
case PROP_OUTPUT_IO_MODE:
g_return_val_if_fail (V4L2_TYPE_IS_OUTPUT (v4l2object->type), FALSE);
g_value_set_enum (value, v4l2object->req_mode);
break;
case PROP_EXTRA_CONTROLS:
gst_value_set_structure (value, v4l2object->extra_controls);
break;
case PROP_PIXEL_ASPECT_RATIO:
if (v4l2object->par)
g_value_transform (v4l2object->par, value);
break;
case PROP_FORCE_ASPECT_RATIO:
g_value_set_boolean (value, v4l2object->keep_aspect);
break;
default:
return FALSE;
break;
}
return TRUE;
}
static void
gst_v4l2_get_driver_min_buffers (GstV4l2Object * v4l2object)
{
struct v4l2_control control = { 0, };
g_return_if_fail (GST_V4L2_IS_OPEN (v4l2object));
if (V4L2_TYPE_IS_OUTPUT (v4l2object->type))
control.id = V4L2_CID_MIN_BUFFERS_FOR_OUTPUT;
else
control.id = V4L2_CID_MIN_BUFFERS_FOR_CAPTURE;
if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CTRL, &control) == 0) {
GST_DEBUG_OBJECT (v4l2object->dbg_obj,
"driver requires a minimum of %d buffers", control.value);
v4l2object->min_buffers = control.value;
} else {
v4l2object->min_buffers = 0;
}
}
static void
gst_v4l2_set_defaults (GstV4l2Object * v4l2object)
{
GstTunerNorm *norm = NULL;
GstTunerChannel *channel = NULL;
GstTuner *tuner;
if (!GST_IS_TUNER (v4l2object->element))
return;
tuner = GST_TUNER (v4l2object->element);
if (v4l2object->tv_norm)
norm = gst_v4l2_tuner_get_norm_by_std_id (v4l2object, v4l2object->tv_norm);
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "tv_norm=0x%" G_GINT64_MODIFIER "x, "
"norm=%p", (guint64) v4l2object->tv_norm, norm);
if (norm) {
gst_tuner_set_norm (tuner, norm);
} else {
norm =
GST_TUNER_NORM (gst_tuner_get_norm (GST_TUNER (v4l2object->element)));
if (norm) {
v4l2object->tv_norm =
gst_v4l2_tuner_get_std_id_by_norm (v4l2object, norm);
gst_tuner_norm_changed (tuner, norm);
}
}
if (v4l2object->channel)
channel = gst_tuner_find_channel_by_name (tuner, v4l2object->channel);
if (channel) {
gst_tuner_set_channel (tuner, channel);
} else {
channel =
GST_TUNER_CHANNEL (gst_tuner_get_channel (GST_TUNER
(v4l2object->element)));
if (channel) {
g_free (v4l2object->channel);
v4l2object->channel = g_strdup (channel->label);
gst_tuner_channel_changed (tuner, channel);
}
}
if (channel
&& GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
if (v4l2object->frequency != 0) {
gst_tuner_set_frequency (tuner, channel, v4l2object->frequency);
} else {
v4l2object->frequency = gst_tuner_get_frequency (tuner, channel);
if (v4l2object->frequency == 0) {
/* guess */
gst_tuner_set_frequency (tuner, channel, 1000);
} else {
}
}
}
}
gboolean
gst_v4l2_object_open (GstV4l2Object * v4l2object, GstV4l2Error * error)
{
if (gst_v4l2_open (v4l2object, error))
gst_v4l2_set_defaults (v4l2object);
else
return FALSE;
return TRUE;
}
gboolean
gst_v4l2_object_open_shared (GstV4l2Object * v4l2object, GstV4l2Object * other)
{
gboolean ret;
ret = gst_v4l2_dup (v4l2object, other);
return ret;
}
gboolean
gst_v4l2_object_close (GstV4l2Object * v4l2object)
{
if (!gst_v4l2_close (v4l2object))
return FALSE;
gst_caps_replace (&v4l2object->probed_caps, NULL);
/* reset our copy of the device caps */
v4l2object->device_caps = 0;
if (v4l2object->formats) {
gst_v4l2_object_clear_format_list (v4l2object);
}
if (v4l2object->par) {
g_value_unset (v4l2object->par);
g_free (v4l2object->par);
v4l2object->par = NULL;
}
if (v4l2object->channel) {
g_free (v4l2object->channel);
v4l2object->channel = NULL;
}
return TRUE;
}
static struct v4l2_fmtdesc *
gst_v4l2_object_get_format_from_fourcc (GstV4l2Object * v4l2object,
guint32 fourcc)
{
struct v4l2_fmtdesc *fmt;
GSList *walk;
if (fourcc == 0)
return NULL;
walk = gst_v4l2_object_get_format_list (v4l2object);
while (walk) {
fmt = (struct v4l2_fmtdesc *) walk->data;
if (fmt->pixelformat == fourcc)
return fmt;
/* special case for jpeg */
if (fmt->pixelformat == V4L2_PIX_FMT_MJPEG ||
fmt->pixelformat == V4L2_PIX_FMT_JPEG ||
fmt->pixelformat == V4L2_PIX_FMT_PJPG) {
if (fourcc == V4L2_PIX_FMT_JPEG || fourcc == V4L2_PIX_FMT_MJPEG ||
fourcc == V4L2_PIX_FMT_PJPG) {
return fmt;
}
}
walk = g_slist_next (walk);
}
return NULL;
}
/* complete made up ranking, the values themselves are meaningless */
/* These ranks MUST be X such that X<<15 fits on a signed int - see
the comment at the end of gst_v4l2_object_format_get_rank. */
#define YUV_BASE_RANK 1000
#define JPEG_BASE_RANK 500
#define DV_BASE_RANK 200
#define RGB_BASE_RANK 100
#define YUV_ODD_BASE_RANK 50
#define RGB_ODD_BASE_RANK 25
#define BAYER_BASE_RANK 15
#define S910_BASE_RANK 10
#define GREY_BASE_RANK 5
#define PWC_BASE_RANK 1
static gint
gst_v4l2_object_format_get_rank (const struct v4l2_fmtdesc *fmt)
{
guint32 fourcc = fmt->pixelformat;
gboolean emulated = ((fmt->flags & V4L2_FMT_FLAG_EMULATED) != 0);
gint rank = 0;
switch (fourcc) {
case V4L2_PIX_FMT_MJPEG:
case V4L2_PIX_FMT_PJPG:
rank = JPEG_BASE_RANK;
break;
case V4L2_PIX_FMT_JPEG:
rank = JPEG_BASE_RANK + 1;
break;
case V4L2_PIX_FMT_MPEG: /* MPEG */
rank = JPEG_BASE_RANK + 2;
break;
case V4L2_PIX_FMT_RGB332:
case V4L2_PIX_FMT_ARGB555:
case V4L2_PIX_FMT_XRGB555:
case V4L2_PIX_FMT_RGB555:
case V4L2_PIX_FMT_ARGB555X:
case V4L2_PIX_FMT_XRGB555X:
case V4L2_PIX_FMT_RGB555X:
case V4L2_PIX_FMT_BGR666:
case V4L2_PIX_FMT_RGB565:
case V4L2_PIX_FMT_RGB565X:
case V4L2_PIX_FMT_RGB444:
case V4L2_PIX_FMT_Y4:
case V4L2_PIX_FMT_Y6:
case V4L2_PIX_FMT_Y10:
case V4L2_PIX_FMT_Y12:
case V4L2_PIX_FMT_Y10BPACK:
case V4L2_PIX_FMT_YUV555:
case V4L2_PIX_FMT_YUV565:
case V4L2_PIX_FMT_YUV32:
case V4L2_PIX_FMT_NV12MT_16X16:
case V4L2_PIX_FMT_NV42:
case V4L2_PIX_FMT_H264_MVC:
rank = RGB_ODD_BASE_RANK;
break;
case V4L2_PIX_FMT_RGB24:
case V4L2_PIX_FMT_BGR24:
rank = RGB_BASE_RANK - 1;
break;
case V4L2_PIX_FMT_RGB32:
case V4L2_PIX_FMT_BGR32:
case V4L2_PIX_FMT_ABGR32:
case V4L2_PIX_FMT_XBGR32:
case V4L2_PIX_FMT_BGRA32:
case V4L2_PIX_FMT_BGRX32:
case V4L2_PIX_FMT_RGBA32:
case V4L2_PIX_FMT_RGBX32:
case V4L2_PIX_FMT_ARGB32:
case V4L2_PIX_FMT_XRGB32:
rank = RGB_BASE_RANK;
break;
case V4L2_PIX_FMT_GREY: /* 8 Greyscale */
rank = GREY_BASE_RANK;
break;
case V4L2_PIX_FMT_NV12MT: /* NV12 64x32 tile */
case V4L2_PIX_FMT_NV21: /* 12 Y/CrCb 4:2:0 */
case V4L2_PIX_FMT_NV21M: /* Same as NV21 */
case V4L2_PIX_FMT_YYUV: /* 16 YUV 4:2:2 */
case V4L2_PIX_FMT_HI240: /* 8 8-bit color */
case V4L2_PIX_FMT_NV16: /* 16 Y/CbCr 4:2:2 */
case V4L2_PIX_FMT_NV16M: /* Same as NV16 */
case V4L2_PIX_FMT_NV61: /* 16 Y/CrCb 4:2:2 */
case V4L2_PIX_FMT_NV61M: /* Same as NV61 */
case V4L2_PIX_FMT_NV24: /* 24 Y/CrCb 4:4:4 */
rank = YUV_ODD_BASE_RANK;
break;
case V4L2_PIX_FMT_YVU410: /* YVU9, 9 bits per pixel */
rank = YUV_BASE_RANK + 3;
break;
case V4L2_PIX_FMT_YUV410: /* YUV9, 9 bits per pixel */
rank = YUV_BASE_RANK + 2;
break;
case V4L2_PIX_FMT_YUV420: /* I420, 12 bits per pixel */
case V4L2_PIX_FMT_YUV420M:
rank = YUV_BASE_RANK + 7;
break;
case V4L2_PIX_FMT_NV12: /* Y/CbCr 4:2:0, 12 bits per pixel */
case V4L2_PIX_FMT_NV12M: /* Same as NV12 */
rank = YUV_BASE_RANK + 8;
break;
case V4L2_PIX_FMT_YUYV: /* YUY2, 16 bits per pixel */
rank = YUV_BASE_RANK + 10;
break;
case V4L2_PIX_FMT_YVU420: /* YV12, 12 bits per pixel */
rank = YUV_BASE_RANK + 6;
break;
case V4L2_PIX_FMT_UYVY: /* UYVY, 16 bits per pixel */
rank = YUV_BASE_RANK + 9;
break;
case V4L2_PIX_FMT_YUV444:
rank = YUV_BASE_RANK + 6;
break;
case V4L2_PIX_FMT_Y41P: /* Y41P, 12 bits per pixel */
rank = YUV_BASE_RANK + 5;
break;
case V4L2_PIX_FMT_YUV411P: /* Y41B, 12 bits per pixel */
rank = YUV_BASE_RANK + 4;
break;
case V4L2_PIX_FMT_YUV422P: /* Y42B, 16 bits per pixel */
rank = YUV_BASE_RANK + 8;
break;
case V4L2_PIX_FMT_DV:
rank = DV_BASE_RANK;
break;
case V4L2_PIX_FMT_WNVA: /* Winnov hw compress */
rank = 0;
break;
case V4L2_PIX_FMT_SBGGR8:
case V4L2_PIX_FMT_SGBRG8:
case V4L2_PIX_FMT_SGRBG8:
case V4L2_PIX_FMT_SRGGB8:
rank = BAYER_BASE_RANK;
break;
case V4L2_PIX_FMT_SN9C10X:
rank = S910_BASE_RANK;
break;
case V4L2_PIX_FMT_PWC1:
rank = PWC_BASE_RANK;
break;
case V4L2_PIX_FMT_PWC2:
rank = PWC_BASE_RANK;
break;
default:
rank = 0;
break;
}
/* All ranks are below 1<<15 so a shift by 15
* will a) make all non-emulated formats larger
* than emulated and b) will not overflow
*/
if (!emulated)
rank <<= 15;
return rank;
}
static gint
format_cmp_func (gconstpointer a, gconstpointer b)
{
const struct v4l2_fmtdesc *fa = a;
const struct v4l2_fmtdesc *fb = b;
if (fa->pixelformat == fb->pixelformat)
return 0;
return gst_v4l2_object_format_get_rank (fb) -
gst_v4l2_object_format_get_rank (fa);
}
/******************************************************
* gst_v4l2_object_fill_format_list():
* create list of supported capture formats
* return value: TRUE on success, FALSE on error
******************************************************/
static gboolean
gst_v4l2_object_fill_format_list (GstV4l2Object * v4l2object,
enum v4l2_buf_type type)
{
gint n;
struct v4l2_fmtdesc *format;
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "getting src format enumerations");
/* format enumeration */
for (n = 0;; n++) {
format = g_new0 (struct v4l2_fmtdesc, 1);
format->index = n;
format->type = type;
if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_ENUM_FMT, format) < 0) {
if (errno == EINVAL) {
g_free (format);
break; /* end of enumeration */
} else {
goto failed;
}
}
GST_LOG_OBJECT (v4l2object->dbg_obj, "index: %u", format->index);
GST_LOG_OBJECT (v4l2object->dbg_obj, "type: %d", format->type);
GST_LOG_OBJECT (v4l2object->dbg_obj, "flags: %08x", format->flags);
GST_LOG_OBJECT (v4l2object->dbg_obj, "description: '%s'",
format->description);
GST_LOG_OBJECT (v4l2object->dbg_obj, "pixelformat: %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (format->pixelformat));
/* sort formats according to our preference; we do this, because caps
* are probed in the order the formats are in the list, and the order of
* formats in the final probed caps matters for things like fixation */
v4l2object->formats = g_slist_insert_sorted (v4l2object->formats, format,
(GCompareFunc) format_cmp_func);
}
#ifndef GST_DISABLE_GST_DEBUG
{
GSList *l;
GST_INFO_OBJECT (v4l2object->dbg_obj, "got %d format(s):", n);
for (l = v4l2object->formats; l != NULL; l = l->next) {
format = l->data;
GST_INFO_OBJECT (v4l2object->dbg_obj,
" %" GST_FOURCC_FORMAT "%s", GST_FOURCC_ARGS (format->pixelformat),
((format->flags & V4L2_FMT_FLAG_EMULATED)) ? " (emulated)" : "");
}
}
#endif
return TRUE;
/* ERRORS */
failed:
{
g_free (format);
if (v4l2object->element)
return FALSE;
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
(_("Failed to enumerate possible video formats device '%s' can work "
"with"), v4l2object->videodev),
("Failed to get number %d in pixelformat enumeration for %s. (%d - %s)",
n, v4l2object->videodev, errno, g_strerror (errno)));
return FALSE;
}
}
/*
* Get the list of supported capture formats, a list of
* `struct v4l2_fmtdesc`.
*/
static GSList *
gst_v4l2_object_get_format_list (GstV4l2Object * v4l2object)
{
if (!v4l2object->formats) {
/* check usual way */
gst_v4l2_object_fill_format_list (v4l2object, v4l2object->type);
/* if our driver supports multi-planar
* and if formats are still empty then we can workaround driver bug
* by also looking up formats as if our device was not supporting
* multiplanar */
if (!v4l2object->formats) {
switch (v4l2object->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
gst_v4l2_object_fill_format_list (v4l2object,
V4L2_BUF_TYPE_VIDEO_CAPTURE);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
gst_v4l2_object_fill_format_list (v4l2object,
V4L2_BUF_TYPE_VIDEO_OUTPUT);
break;
default:
break;
}
}
}
return v4l2object->formats;
}
static GstVideoFormat
gst_v4l2_object_v4l2fourcc_to_video_format (guint32 fourcc)
{
GstVideoFormat format;
switch (fourcc) {
case V4L2_PIX_FMT_GREY: /* 8 Greyscale */
format = GST_VIDEO_FORMAT_GRAY8;
break;
case V4L2_PIX_FMT_Y16:
format = GST_VIDEO_FORMAT_GRAY16_LE;
break;
case V4L2_PIX_FMT_Y16_BE:
format = GST_VIDEO_FORMAT_GRAY16_BE;
break;
case V4L2_PIX_FMT_XRGB555:
case V4L2_PIX_FMT_RGB555:
format = GST_VIDEO_FORMAT_RGB15;
break;
case V4L2_PIX_FMT_XRGB555X:
case V4L2_PIX_FMT_RGB555X:
format = GST_VIDEO_FORMAT_BGR15;
break;
case V4L2_PIX_FMT_RGB565:
format = GST_VIDEO_FORMAT_RGB16;
break;
case V4L2_PIX_FMT_RGB24:
format = GST_VIDEO_FORMAT_RGB;
break;
case V4L2_PIX_FMT_BGR24:
format = GST_VIDEO_FORMAT_BGR;
break;
case V4L2_PIX_FMT_XRGB32:
case V4L2_PIX_FMT_RGB32:
format = GST_VIDEO_FORMAT_xRGB;
break;
case V4L2_PIX_FMT_RGBX32:
format = GST_VIDEO_FORMAT_RGBx;
break;
case V4L2_PIX_FMT_XBGR32:
case V4L2_PIX_FMT_BGR32:
format = GST_VIDEO_FORMAT_BGRx;
break;
case V4L2_PIX_FMT_BGRX32:
format = GST_VIDEO_FORMAT_xBGR;
break;
case V4L2_PIX_FMT_ABGR32:
format = GST_VIDEO_FORMAT_BGRA;
break;
case V4L2_PIX_FMT_BGRA32:
format = GST_VIDEO_FORMAT_ABGR;
break;
case V4L2_PIX_FMT_RGBA32:
format = GST_VIDEO_FORMAT_RGBA;
break;
case V4L2_PIX_FMT_ARGB32:
format = GST_VIDEO_FORMAT_ARGB;
break;
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV12M:
format = GST_VIDEO_FORMAT_NV12;
break;
case V4L2_PIX_FMT_NV12MT:
format = GST_VIDEO_FORMAT_NV12_64Z32;
break;
case V4L2_PIX_FMT_NV21:
case V4L2_PIX_FMT_NV21M:
format = GST_VIDEO_FORMAT_NV21;
break;
case V4L2_PIX_FMT_YVU410:
format = GST_VIDEO_FORMAT_YVU9;
break;
case V4L2_PIX_FMT_YUV410:
format = GST_VIDEO_FORMAT_YUV9;
break;
case V4L2_PIX_FMT_YUV420:
case V4L2_PIX_FMT_YUV420M:
format = GST_VIDEO_FORMAT_I420;
break;
case V4L2_PIX_FMT_YUYV:
format = GST_VIDEO_FORMAT_YUY2;
break;
case V4L2_PIX_FMT_YVU420:
format = GST_VIDEO_FORMAT_YV12;
break;
case V4L2_PIX_FMT_UYVY:
format = GST_VIDEO_FORMAT_UYVY;
break;
case V4L2_PIX_FMT_YUV411P:
format = GST_VIDEO_FORMAT_Y41B;
break;
case V4L2_PIX_FMT_YUV422P:
format = GST_VIDEO_FORMAT_Y42B;
break;
case V4L2_PIX_FMT_YVYU:
format = GST_VIDEO_FORMAT_YVYU;
break;
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV16M:
format = GST_VIDEO_FORMAT_NV16;
break;
case V4L2_PIX_FMT_NV61:
case V4L2_PIX_FMT_NV61M:
format = GST_VIDEO_FORMAT_NV61;
break;
case V4L2_PIX_FMT_NV24:
format = GST_VIDEO_FORMAT_NV24;
break;
default:
format = GST_VIDEO_FORMAT_UNKNOWN;
break;
}
return format;
}
static gboolean
gst_v4l2_object_v4l2fourcc_is_rgb (guint32 fourcc)
{
gboolean ret = FALSE;
switch (fourcc) {
case V4L2_PIX_FMT_XRGB555:
case V4L2_PIX_FMT_RGB555:
case V4L2_PIX_FMT_XRGB555X:
case V4L2_PIX_FMT_RGB555X:
case V4L2_PIX_FMT_RGB565:
case V4L2_PIX_FMT_RGB24:
case V4L2_PIX_FMT_BGR24:
case V4L2_PIX_FMT_XRGB32:
case V4L2_PIX_FMT_RGB32:
case V4L2_PIX_FMT_RGBA32:
case V4L2_PIX_FMT_RGBX32:
case V4L2_PIX_FMT_XBGR32:
case V4L2_PIX_FMT_BGR32:
case V4L2_PIX_FMT_BGRA32:
case V4L2_PIX_FMT_BGRX32:
case V4L2_PIX_FMT_ABGR32:
case V4L2_PIX_FMT_ARGB32:
case V4L2_PIX_FMT_SBGGR8:
case V4L2_PIX_FMT_SGBRG8:
case V4L2_PIX_FMT_SGRBG8:
case V4L2_PIX_FMT_SRGGB8:
ret = TRUE;
break;
default:
break;
}
return ret;
}
static GstStructure *
gst_v4l2_object_v4l2fourcc_to_bare_struct (guint32 fourcc)
{
GstStructure *structure = NULL;
switch (fourcc) {
case V4L2_PIX_FMT_MJPEG: /* Motion-JPEG */
case V4L2_PIX_FMT_PJPG: /* Progressive-JPEG */
case V4L2_PIX_FMT_JPEG: /* JFIF JPEG */
structure = gst_structure_new_empty ("image/jpeg");
break;
case V4L2_PIX_FMT_MPEG1:
structure = gst_structure_new ("video/mpeg",
"mpegversion", G_TYPE_INT, 1, NULL);
break;
case V4L2_PIX_FMT_MPEG2:
structure = gst_structure_new ("video/mpeg",
"mpegversion", G_TYPE_INT, 2, NULL);
break;
case V4L2_PIX_FMT_MPEG4:
case V4L2_PIX_FMT_XVID:
structure = gst_structure_new ("video/mpeg",
"mpegversion", G_TYPE_INT, 4, "systemstream",
G_TYPE_BOOLEAN, FALSE, NULL);
break;
case V4L2_PIX_FMT_FWHT:
structure = gst_structure_new_empty ("video/x-fwht");
break;
case V4L2_PIX_FMT_H263:
structure = gst_structure_new ("video/x-h263",
"variant", G_TYPE_STRING, "itu", NULL);
break;
case V4L2_PIX_FMT_H264: /* H.264 */
structure = gst_structure_new ("video/x-h264",
"stream-format", G_TYPE_STRING, "byte-stream", "alignment",
G_TYPE_STRING, "au", NULL);
break;
case V4L2_PIX_FMT_H264_NO_SC:
structure = gst_structure_new ("video/x-h264",
"stream-format", G_TYPE_STRING, "avc", "alignment",
G_TYPE_STRING, "au", NULL);
break;
case V4L2_PIX_FMT_HEVC: /* H.265 */
structure = gst_structure_new ("video/x-h265",
"stream-format", G_TYPE_STRING, "byte-stream", "alignment",
G_TYPE_STRING, "au", NULL);
break;
case V4L2_PIX_FMT_VC1_ANNEX_G:
case V4L2_PIX_FMT_VC1_ANNEX_L:
structure = gst_structure_new ("video/x-wmv",
"wmvversion", G_TYPE_INT, 3, "format", G_TYPE_STRING, "WVC1", NULL);
break;
case V4L2_PIX_FMT_VP8:
structure = gst_structure_new_empty ("video/x-vp8");
break;
case V4L2_PIX_FMT_VP9:
structure = gst_structure_new_empty ("video/x-vp9");
break;
case V4L2_PIX_FMT_GREY: /* 8 Greyscale */
case V4L2_PIX_FMT_Y16:
case V4L2_PIX_FMT_Y16_BE:
case V4L2_PIX_FMT_XRGB555:
case V4L2_PIX_FMT_RGB555:
case V4L2_PIX_FMT_XRGB555X:
case V4L2_PIX_FMT_RGB555X:
case V4L2_PIX_FMT_RGB565:
case V4L2_PIX_FMT_RGB24:
case V4L2_PIX_FMT_BGR24:
case V4L2_PIX_FMT_RGB32:
case V4L2_PIX_FMT_XRGB32:
case V4L2_PIX_FMT_ARGB32:
case V4L2_PIX_FMT_RGBX32:
case V4L2_PIX_FMT_RGBA32:
case V4L2_PIX_FMT_BGR32:
case V4L2_PIX_FMT_BGRX32:
case V4L2_PIX_FMT_BGRA32:
case V4L2_PIX_FMT_XBGR32:
case V4L2_PIX_FMT_ABGR32:
case V4L2_PIX_FMT_NV12: /* 12 Y/CbCr 4:2:0 */
case V4L2_PIX_FMT_NV12M:
case V4L2_PIX_FMT_NV12MT:
case V4L2_PIX_FMT_NV21: /* 12 Y/CrCb 4:2:0 */
case V4L2_PIX_FMT_NV21M:
case V4L2_PIX_FMT_NV16: /* 16 Y/CbCr 4:2:2 */
case V4L2_PIX_FMT_NV16M:
case V4L2_PIX_FMT_NV61: /* 16 Y/CrCb 4:2:2 */
case V4L2_PIX_FMT_NV61M:
case V4L2_PIX_FMT_NV24: /* 24 Y/CrCb 4:4:4 */
case V4L2_PIX_FMT_YVU410:
case V4L2_PIX_FMT_YUV410:
case V4L2_PIX_FMT_YUV420: /* I420/IYUV */
case V4L2_PIX_FMT_YUV420M:
case V4L2_PIX_FMT_YUYV:
case V4L2_PIX_FMT_YVU420:
case V4L2_PIX_FMT_UYVY:
case V4L2_PIX_FMT_YUV422P:
case V4L2_PIX_FMT_YVYU:
case V4L2_PIX_FMT_YUV411P:{
GstVideoFormat format;
format = gst_v4l2_object_v4l2fourcc_to_video_format (fourcc);
if (format != GST_VIDEO_FORMAT_UNKNOWN)
structure = gst_structure_new ("video/x-raw",
"format", G_TYPE_STRING, gst_video_format_to_string (format), NULL);
break;
}
case V4L2_PIX_FMT_DV:
structure =
gst_structure_new ("video/x-dv", "systemstream", G_TYPE_BOOLEAN, TRUE,
NULL);
break;
case V4L2_PIX_FMT_MPEG: /* MPEG */
structure = gst_structure_new ("video/mpegts",
"systemstream", G_TYPE_BOOLEAN, TRUE, NULL);
break;
case V4L2_PIX_FMT_WNVA: /* Winnov hw compress */
break;
case V4L2_PIX_FMT_SBGGR8:
case V4L2_PIX_FMT_SGBRG8:
case V4L2_PIX_FMT_SGRBG8:
case V4L2_PIX_FMT_SRGGB8:
structure = gst_structure_new ("video/x-bayer", "format", G_TYPE_STRING,
fourcc == V4L2_PIX_FMT_SBGGR8 ? "bggr" :
fourcc == V4L2_PIX_FMT_SGBRG8 ? "gbrg" :
fourcc == V4L2_PIX_FMT_SGRBG8 ? "grbg" :
/* fourcc == V4L2_PIX_FMT_SRGGB8 ? */ "rggb", NULL);
break;
case V4L2_PIX_FMT_SN9C10X:
structure = gst_structure_new_empty ("video/x-sonix");
break;
case V4L2_PIX_FMT_PWC1:
structure = gst_structure_new_empty ("video/x-pwc1");
break;
case V4L2_PIX_FMT_PWC2:
structure = gst_structure_new_empty ("video/x-pwc2");
break;
case V4L2_PIX_FMT_RGB332:
case V4L2_PIX_FMT_BGR666:
case V4L2_PIX_FMT_ARGB555X:
case V4L2_PIX_FMT_RGB565X:
case V4L2_PIX_FMT_RGB444:
case V4L2_PIX_FMT_YYUV: /* 16 YUV 4:2:2 */
case V4L2_PIX_FMT_HI240: /* 8 8-bit color */
case V4L2_PIX_FMT_Y4:
case V4L2_PIX_FMT_Y6:
case V4L2_PIX_FMT_Y10:
case V4L2_PIX_FMT_Y12:
case V4L2_PIX_FMT_Y10BPACK:
case V4L2_PIX_FMT_YUV444:
case V4L2_PIX_FMT_YUV555:
case V4L2_PIX_FMT_YUV565:
case V4L2_PIX_FMT_Y41P:
case V4L2_PIX_FMT_YUV32:
case V4L2_PIX_FMT_NV12MT_16X16:
case V4L2_PIX_FMT_NV42:
case V4L2_PIX_FMT_H264_MVC:
default:
GST_DEBUG ("Unsupported fourcc 0x%08x %" GST_FOURCC_FORMAT,
fourcc, GST_FOURCC_ARGS (fourcc));
break;
}
return structure;
}
GstStructure *
gst_v4l2_object_v4l2fourcc_to_structure (guint32 fourcc)
{
GstStructure *template;
gint i;
template = gst_v4l2_object_v4l2fourcc_to_bare_struct (fourcc);
if (template == NULL)
goto done;
for (i = 0; i < GST_V4L2_FORMAT_COUNT; i++) {
if (gst_v4l2_formats[i].format != fourcc)
continue;
if (gst_v4l2_formats[i].dimensions) {
gst_structure_set (template,
"width", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
"height", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
"framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
}
break;
}
done:
return template;
}
/* Add an 'alternate' variant of the caps with the feature */
static void
add_alternate_variant (GstV4l2Object * v4l2object, GstCaps * caps,
GstStructure * structure)
{
GstStructure *alt_s;
if (v4l2object && v4l2object->never_interlaced)
return;
if (!gst_structure_has_name (structure, "video/x-raw"))
return;
alt_s = gst_structure_copy (structure);
gst_structure_set (alt_s, "interlace-mode", G_TYPE_STRING, "alternate", NULL);
gst_caps_append_structure_full (caps, alt_s,
gst_caps_features_new (GST_CAPS_FEATURE_FORMAT_INTERLACED, NULL));
}
static GstCaps *
gst_v4l2_object_get_caps_helper (GstV4L2FormatFlags flags)
{
GstStructure *structure;
GstCaps *caps, *caps_interlaced;
guint i;
caps = gst_caps_new_empty ();
caps_interlaced = gst_caps_new_empty ();
for (i = 0; i < GST_V4L2_FORMAT_COUNT; i++) {
if ((gst_v4l2_formats[i].flags & flags) == 0)
continue;
structure =
gst_v4l2_object_v4l2fourcc_to_bare_struct (gst_v4l2_formats[i].format);
if (structure) {
GstStructure *alt_s = NULL;
if (gst_v4l2_formats[i].dimensions) {
gst_structure_set (structure,
"width", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
"height", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
"framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
}
switch (gst_v4l2_formats[i].format) {
case V4L2_PIX_FMT_RGB32:
alt_s = gst_structure_copy (structure);
gst_structure_set (alt_s, "format", G_TYPE_STRING, "ARGB", NULL);
break;
case V4L2_PIX_FMT_BGR32:
alt_s = gst_structure_copy (structure);
gst_structure_set (alt_s, "format", G_TYPE_STRING, "BGRA", NULL);
default:
break;
}
gst_caps_append_structure (caps, structure);
if (alt_s) {
gst_caps_append_structure (caps, alt_s);
add_alternate_variant (NULL, caps_interlaced, alt_s);
}
add_alternate_variant (NULL, caps_interlaced, structure);
}
}
caps = gst_caps_simplify (caps);
caps_interlaced = gst_caps_simplify (caps_interlaced);
return gst_caps_merge (caps, caps_interlaced);
}
GstCaps *
gst_v4l2_object_get_all_caps (void)
{
static GstCaps *caps = NULL;
if (g_once_init_enter (&caps)) {
GstCaps *all_caps = gst_v4l2_object_get_caps_helper (GST_V4L2_ALL);
GST_MINI_OBJECT_FLAG_SET (all_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
g_once_init_leave (&caps, all_caps);
}
return caps;
}
GstCaps *
gst_v4l2_object_get_raw_caps (void)
{
static GstCaps *caps = NULL;
if (g_once_init_enter (&caps)) {
GstCaps *raw_caps = gst_v4l2_object_get_caps_helper (GST_V4L2_RAW);
GST_MINI_OBJECT_FLAG_SET (raw_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
g_once_init_leave (&caps, raw_caps);
}
return caps;
}
GstCaps *
gst_v4l2_object_get_codec_caps (void)
{
static GstCaps *caps = NULL;
if (g_once_init_enter (&caps)) {
GstCaps *codec_caps = gst_v4l2_object_get_caps_helper (GST_V4L2_CODEC);
GST_MINI_OBJECT_FLAG_SET (codec_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
g_once_init_leave (&caps, codec_caps);
}
return caps;
}
/* collect data for the given caps
* @caps: given input caps
* @format: location for the v4l format
* @w/@h: location for width and height
* @fps_n/@fps_d: location for framerate
* @size: location for expected size of the frame or 0 if unknown
*/
static gboolean
gst_v4l2_object_get_caps_info (GstV4l2Object * v4l2object, GstCaps * caps,
struct v4l2_fmtdesc **format, GstVideoInfo * info)
{
GstStructure *structure;
guint32 fourcc = 0, fourcc_nc = 0;
const gchar *mimetype;
struct v4l2_fmtdesc *fmt = NULL;
structure = gst_caps_get_structure (caps, 0);
mimetype = gst_structure_get_name (structure);
if (!gst_video_info_from_caps (info, caps))
goto invalid_format;
if (g_str_equal (mimetype, "video/x-raw")) {
switch (GST_VIDEO_INFO_FORMAT (info)) {
case GST_VIDEO_FORMAT_I420:
fourcc = V4L2_PIX_FMT_YUV420;
fourcc_nc = V4L2_PIX_FMT_YUV420M;
break;
case GST_VIDEO_FORMAT_YUY2:
fourcc = V4L2_PIX_FMT_YUYV;
break;
case GST_VIDEO_FORMAT_UYVY:
fourcc = V4L2_PIX_FMT_UYVY;
break;
case GST_VIDEO_FORMAT_YV12:
fourcc = V4L2_PIX_FMT_YVU420;
break;
case GST_VIDEO_FORMAT_Y41B:
fourcc = V4L2_PIX_FMT_YUV411P;
break;
case GST_VIDEO_FORMAT_Y42B:
fourcc = V4L2_PIX_FMT_YUV422P;
break;
case GST_VIDEO_FORMAT_NV12:
fourcc = V4L2_PIX_FMT_NV12;
fourcc_nc = V4L2_PIX_FMT_NV12M;
break;
case GST_VIDEO_FORMAT_NV12_64Z32:
fourcc_nc = V4L2_PIX_FMT_NV12MT;
break;
case GST_VIDEO_FORMAT_NV21:
fourcc = V4L2_PIX_FMT_NV21;
fourcc_nc = V4L2_PIX_FMT_NV21M;
break;
case GST_VIDEO_FORMAT_NV16:
fourcc = V4L2_PIX_FMT_NV16;
fourcc_nc = V4L2_PIX_FMT_NV16M;
break;
case GST_VIDEO_FORMAT_NV61:
fourcc = V4L2_PIX_FMT_NV61;
fourcc_nc = V4L2_PIX_FMT_NV61M;
break;
case GST_VIDEO_FORMAT_NV24:
fourcc = V4L2_PIX_FMT_NV24;
break;
case GST_VIDEO_FORMAT_YVYU:
fourcc = V4L2_PIX_FMT_YVYU;
break;
case GST_VIDEO_FORMAT_RGB15:
fourcc = V4L2_PIX_FMT_RGB555;
fourcc_nc = V4L2_PIX_FMT_XRGB555;
break;
case GST_VIDEO_FORMAT_RGB16:
fourcc = V4L2_PIX_FMT_RGB565;
break;
case GST_VIDEO_FORMAT_RGB:
fourcc = V4L2_PIX_FMT_RGB24;
break;
case GST_VIDEO_FORMAT_BGR:
fourcc = V4L2_PIX_FMT_BGR24;
break;
case GST_VIDEO_FORMAT_xRGB:
fourcc = V4L2_PIX_FMT_RGB32;
fourcc_nc = V4L2_PIX_FMT_XRGB32;
break;
case GST_VIDEO_FORMAT_RGBx:
fourcc = V4L2_PIX_FMT_RGBX32;
break;
case GST_VIDEO_FORMAT_ARGB:
fourcc = V4L2_PIX_FMT_RGB32;
fourcc_nc = V4L2_PIX_FMT_ARGB32;
break;
case GST_VIDEO_FORMAT_RGBA:
fourcc = V4L2_PIX_FMT_RGBA32;
break;
case GST_VIDEO_FORMAT_BGRx:
fourcc = V4L2_PIX_FMT_BGR32;
fourcc_nc = V4L2_PIX_FMT_XBGR32;
break;
case GST_VIDEO_FORMAT_xBGR:
fourcc = V4L2_PIX_FMT_BGRX32;
break;
case GST_VIDEO_FORMAT_BGRA:
fourcc = V4L2_PIX_FMT_BGR32;
fourcc_nc = V4L2_PIX_FMT_ABGR32;
break;
case GST_VIDEO_FORMAT_ABGR:
fourcc = V4L2_PIX_FMT_BGRA32;
break;
case GST_VIDEO_FORMAT_GRAY8:
fourcc = V4L2_PIX_FMT_GREY;
break;
case GST_VIDEO_FORMAT_GRAY16_LE:
fourcc = V4L2_PIX_FMT_Y16;
break;
case GST_VIDEO_FORMAT_GRAY16_BE:
fourcc = V4L2_PIX_FMT_Y16_BE;
break;
case GST_VIDEO_FORMAT_BGR15:
fourcc = V4L2_PIX_FMT_RGB555X;
fourcc_nc = V4L2_PIX_FMT_XRGB555X;
break;
default:
break;
}
} else {
if (g_str_equal (mimetype, "video/mpegts")) {
fourcc = V4L2_PIX_FMT_MPEG;
} else if (g_str_equal (mimetype, "video/x-dv")) {
fourcc = V4L2_PIX_FMT_DV;
} else if (g_str_equal (mimetype, "image/jpeg")) {
fourcc = V4L2_PIX_FMT_JPEG;
} else if (g_str_equal (mimetype, "video/mpeg")) {
gint version;
if (gst_structure_get_int (structure, "mpegversion", &version)) {
switch (version) {
case 1:
fourcc = V4L2_PIX_FMT_MPEG1;
break;
case 2:
fourcc = V4L2_PIX_FMT_MPEG2;
break;
case 4:
fourcc = V4L2_PIX_FMT_MPEG4;
fourcc_nc = V4L2_PIX_FMT_XVID;
break;
default:
break;
}
}
} else if (g_str_equal (mimetype, "video/x-fwht")) {
fourcc = V4L2_PIX_FMT_FWHT;
} else if (g_str_equal (mimetype, "video/x-h263")) {
fourcc = V4L2_PIX_FMT_H263;
} else if (g_str_equal (mimetype, "video/x-h264")) {
const gchar *stream_format =
gst_structure_get_string (structure, "stream-format");
if (g_str_equal (stream_format, "avc"))
fourcc = V4L2_PIX_FMT_H264_NO_SC;
else
fourcc = V4L2_PIX_FMT_H264;
} else if (g_str_equal (mimetype, "video/x-h265")) {
fourcc = V4L2_PIX_FMT_HEVC;
} else if (g_str_equal (mimetype, "video/x-vp8")) {
fourcc = V4L2_PIX_FMT_VP8;
} else if (g_str_equal (mimetype, "video/x-vp9")) {
fourcc = V4L2_PIX_FMT_VP9;
} else if (g_str_equal (mimetype, "video/x-bayer")) {
const gchar *format = gst_structure_get_string (structure, "format");
if (format) {
if (!g_ascii_strcasecmp (format, "bggr"))
fourcc = V4L2_PIX_FMT_SBGGR8;
else if (!g_ascii_strcasecmp (format, "gbrg"))
fourcc = V4L2_PIX_FMT_SGBRG8;
else if (!g_ascii_strcasecmp (format, "grbg"))
fourcc = V4L2_PIX_FMT_SGRBG8;
else if (!g_ascii_strcasecmp (format, "rggb"))
fourcc = V4L2_PIX_FMT_SRGGB8;
}
} else if (g_str_equal (mimetype, "video/x-sonix")) {
fourcc = V4L2_PIX_FMT_SN9C10X;
} else if (g_str_equal (mimetype, "video/x-pwc1")) {
fourcc = V4L2_PIX_FMT_PWC1;
} else if (g_str_equal (mimetype, "video/x-pwc2")) {
fourcc = V4L2_PIX_FMT_PWC2;
}
}
/* Prefer the non-contiguous if supported */
v4l2object->prefered_non_contiguous = TRUE;
if (fourcc_nc)
fmt = gst_v4l2_object_get_format_from_fourcc (v4l2object, fourcc_nc);
else if (fourcc == 0)
goto unhandled_format;
if (fmt == NULL) {
fmt = gst_v4l2_object_get_format_from_fourcc (v4l2object, fourcc);
v4l2object->prefered_non_contiguous = FALSE;
}
if (fmt == NULL)
goto unsupported_format;
*format = fmt;
return TRUE;
/* ERRORS */
invalid_format:
{
GST_DEBUG_OBJECT (v4l2object, "invalid format");
return FALSE;
}
unhandled_format:
{
GST_DEBUG_OBJECT (v4l2object, "unhandled format");
return FALSE;
}
unsupported_format:
{
GST_DEBUG_OBJECT (v4l2object, "unsupported format");
return FALSE;
}
}
static gboolean
gst_v4l2_object_get_nearest_size (GstV4l2Object * v4l2object,
guint32 pixelformat, gint * width, gint * height);
static void
gst_v4l2_object_add_aspect_ratio (GstV4l2Object * v4l2object, GstStructure * s)
{
if (v4l2object->keep_aspect && v4l2object->par)
gst_structure_set_value (s, "pixel-aspect-ratio", v4l2object->par);
}
/* returns TRUE if the value was changed in place, otherwise FALSE */
static gboolean
gst_v4l2src_value_simplify (GValue * val)
{
/* simplify list of one value to one value */
if (GST_VALUE_HOLDS_LIST (val) && gst_value_list_get_size (val) == 1) {
const GValue *list_val;
GValue new_val = G_VALUE_INIT;
list_val = gst_value_list_get_value (val, 0);
g_value_init (&new_val, G_VALUE_TYPE (list_val));
g_value_copy (list_val, &new_val);
g_value_unset (val);
*val = new_val;
return TRUE;
}
return FALSE;
}
static gboolean
gst_v4l2_object_get_interlace_mode (enum v4l2_field field,
GstVideoInterlaceMode * interlace_mode)
{
switch (field) {
case V4L2_FIELD_ANY:
GST_ERROR
("Driver bug detected - check driver with v4l2-compliance from http://git.linuxtv.org/v4l-utils.git\n");
return FALSE;
case V4L2_FIELD_NONE:
*interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
return TRUE;
case V4L2_FIELD_INTERLACED:
case V4L2_FIELD_INTERLACED_TB:
case V4L2_FIELD_INTERLACED_BT:
*interlace_mode = GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
return TRUE;
case V4L2_FIELD_ALTERNATE:
*interlace_mode = GST_VIDEO_INTERLACE_MODE_ALTERNATE;
return TRUE;
default:
GST_ERROR ("Unknown enum v4l2_field %d", field);
return FALSE;
}
}
static gboolean
gst_v4l2_object_get_colorspace (GstV4l2Object * v4l2object,
struct v4l2_format *fmt, GstVideoColorimetry * cinfo)
{
gboolean is_rgb =
gst_v4l2_object_v4l2fourcc_is_rgb (fmt->fmt.pix.pixelformat);
enum v4l2_colorspace colorspace;
enum v4l2_quantization range;
enum v4l2_ycbcr_encoding matrix;
enum v4l2_xfer_func transfer;
gboolean ret = TRUE;
if (V4L2_TYPE_IS_MULTIPLANAR (fmt->type)) {
colorspace = fmt->fmt.pix_mp.colorspace;
range = fmt->fmt.pix_mp.quantization;
matrix = fmt->fmt.pix_mp.ycbcr_enc;
transfer = fmt->fmt.pix_mp.xfer_func;
} else {
colorspace = fmt->fmt.pix.colorspace;
range = fmt->fmt.pix.quantization;
matrix = fmt->fmt.pix.ycbcr_enc;
transfer = fmt->fmt.pix.xfer_func;
}
/* First step, set the defaults for each primaries */
switch (colorspace) {
case V4L2_COLORSPACE_SMPTE170M:
cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
cinfo->transfer = GST_VIDEO_TRANSFER_BT601;
cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_SMPTE170M;
break;
case V4L2_COLORSPACE_REC709:
cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT709;
cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT709;
break;
case V4L2_COLORSPACE_SRGB:
case V4L2_COLORSPACE_JPEG:
cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
cinfo->transfer = GST_VIDEO_TRANSFER_SRGB;
cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT709;
break;
case V4L2_COLORSPACE_OPRGB:
cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
cinfo->transfer = GST_VIDEO_TRANSFER_ADOBERGB;
cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_ADOBERGB;
break;
case V4L2_COLORSPACE_BT2020:
cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT2020;
cinfo->transfer = GST_VIDEO_TRANSFER_BT2020_12;
cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT2020;
break;
case V4L2_COLORSPACE_SMPTE240M:
cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
cinfo->matrix = GST_VIDEO_COLOR_MATRIX_SMPTE240M;
cinfo->transfer = GST_VIDEO_TRANSFER_SMPTE240M;
cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_SMPTE240M;
break;
case V4L2_COLORSPACE_470_SYSTEM_M:
cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT470M;
break;
case V4L2_COLORSPACE_470_SYSTEM_BG:
cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT470BG;
break;
case V4L2_COLORSPACE_RAW:
/* Explicitly unknown */
cinfo->range = GST_VIDEO_COLOR_RANGE_UNKNOWN;
cinfo->matrix = GST_VIDEO_COLOR_MATRIX_UNKNOWN;
cinfo->transfer = GST_VIDEO_TRANSFER_UNKNOWN;
cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_UNKNOWN;
break;
default:
GST_DEBUG ("Unknown enum v4l2_colorspace %d", colorspace);
ret = FALSE;
break;
}
if (!ret)
goto done;
/* Second step, apply any custom variation */
switch (range) {
case V4L2_QUANTIZATION_FULL_RANGE:
cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
break;
case V4L2_QUANTIZATION_LIM_RANGE:
cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
break;
case V4L2_QUANTIZATION_DEFAULT:
/* replicated V4L2_MAP_QUANTIZATION_DEFAULT macro behavior */
if (is_rgb && colorspace == V4L2_COLORSPACE_BT2020)
cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
else if (is_rgb || matrix == V4L2_YCBCR_ENC_XV601
|| matrix == V4L2_YCBCR_ENC_XV709
|| colorspace == V4L2_COLORSPACE_JPEG)
cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
else
cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
break;
default:
GST_WARNING ("Unknown enum v4l2_quantization value %d", range);
cinfo->range = GST_VIDEO_COLOR_RANGE_UNKNOWN;
break;
}
switch (matrix) {
case V4L2_YCBCR_ENC_XV601:
case V4L2_YCBCR_ENC_SYCC:
GST_FIXME ("XV601 and SYCC not defined, assuming 601");
/* fallthrough */
case V4L2_YCBCR_ENC_601:
cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
break;
case V4L2_YCBCR_ENC_XV709:
GST_FIXME ("XV709 not defined, assuming 709");
/* fallthrough */
case V4L2_YCBCR_ENC_709:
cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT709;
break;
case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
GST_FIXME ("BT2020 with constant luma is not defined, assuming BT2020");
/* fallthrough */
case V4L2_YCBCR_ENC_BT2020:
cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT2020;
break;
case V4L2_YCBCR_ENC_SMPTE240M:
cinfo->matrix = GST_VIDEO_COLOR_MATRIX_SMPTE240M;
break;
case V4L2_YCBCR_ENC_DEFAULT:
/* nothing, just use defaults for colorspace */
break;
default:
GST_WARNING ("Unknown enum v4l2_ycbcr_encoding value %d", matrix);
cinfo->matrix = GST_VIDEO_COLOR_MATRIX_UNKNOWN;
break;
}
/* Set identity matrix for R'G'B' formats to avoid creating
* confusion. This though is cosmetic as it's now properly ignored by
* the video info API and videoconvert. */
if (is_rgb)
cinfo->matrix = GST_VIDEO_COLOR_MATRIX_RGB;
switch (transfer) {
case V4L2_XFER_FUNC_709:
if (colorspace == V4L2_COLORSPACE_BT2020 && fmt->fmt.pix.height >= 2160)
cinfo->transfer = GST_VIDEO_TRANSFER_BT2020_12;
else if (colorspace == V4L2_COLORSPACE_SMPTE170M)
cinfo->transfer = GST_VIDEO_TRANSFER_BT601;
else
cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
if (v4l2object->transfer)
cinfo->transfer = v4l2object->transfer;
break;
case V4L2_XFER_FUNC_SRGB:
cinfo->transfer = GST_VIDEO_TRANSFER_SRGB;
break;
case V4L2_XFER_FUNC_OPRGB:
cinfo->transfer = GST_VIDEO_TRANSFER_ADOBERGB;
break;
case V4L2_XFER_FUNC_SMPTE240M:
cinfo->transfer = GST_VIDEO_TRANSFER_SMPTE240M;
break;
case V4L2_XFER_FUNC_NONE:
cinfo->transfer = GST_VIDEO_TRANSFER_GAMMA10;
break;
case V4L2_XFER_FUNC_SMPTE2084:
cinfo->transfer = GST_VIDEO_TRANSFER_SMPTE2084;
break;
case V4L2_XFER_FUNC_DEFAULT:
/* nothing, just use defaults for colorspace */
break;
default:
GST_WARNING ("Unknown enum v4l2_xfer_func value %d", transfer);
cinfo->transfer = GST_VIDEO_TRANSFER_UNKNOWN;
break;
}
done:
return ret;
}
static gboolean
gst_v4l2_object_get_streamparm (GstV4l2Object * v4l2object, GstVideoInfo * info)
{
struct v4l2_streamparm streamparm;
memset (&streamparm, 0x00, sizeof (struct v4l2_streamparm));
streamparm.type = v4l2object->type;
if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_PARM, &streamparm) < 0) {
GST_WARNING_OBJECT (v4l2object->dbg_obj, "VIDIOC_G_PARM failed");
return FALSE;
}
if ((streamparm.parm.capture.timeperframe.numerator != 0)
&& (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE
|| v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)) {
GST_VIDEO_INFO_FPS_N (info) =
streamparm.parm.capture.timeperframe.denominator;
GST_VIDEO_INFO_FPS_D (info) =
streamparm.parm.capture.timeperframe.numerator;
}
return TRUE;
}
static int
gst_v4l2_object_try_fmt (GstV4l2Object * v4l2object,
struct v4l2_format *try_fmt)
{
int fd = v4l2object->video_fd;
struct v4l2_format fmt;
int r;
memcpy (&fmt, try_fmt, sizeof (fmt));
r = v4l2object->ioctl (fd, VIDIOC_TRY_FMT, &fmt);
if (r < 0 && errno == ENOTTY) {
/* The driver might not implement TRY_FMT, in which case we will try
S_FMT to probe */
if (GST_V4L2_IS_ACTIVE (v4l2object))
goto error;
memcpy (&fmt, try_fmt, sizeof (fmt));
r = v4l2object->ioctl (fd, VIDIOC_S_FMT, &fmt);
}
memcpy (try_fmt, &fmt, sizeof (fmt));
return r;
error:
memcpy (try_fmt, &fmt, sizeof (fmt));
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"Unable to try format: %s", g_strerror (errno));
return r;
}
static void
gst_v4l2_object_add_interlace_mode (GstV4l2Object * v4l2object,
GstStructure * s, guint32 width, guint32 height, guint32 pixelformat)
{
struct v4l2_format fmt;
GValue interlace_formats = { 0, };
enum v4l2_field formats[] = { V4L2_FIELD_NONE,
V4L2_FIELD_INTERLACED, V4L2_FIELD_ALTERNATE
};
gsize i;
GstVideoInterlaceMode interlace_mode, prev = -1;
if (!g_str_equal (gst_structure_get_name (s), "video/x-raw"))
return;
if (v4l2object->never_interlaced) {
gst_structure_set (s, "interlace-mode", G_TYPE_STRING, "progressive", NULL);
return;
}
g_value_init (&interlace_formats, GST_TYPE_LIST);
/* Try thrice - once for NONE, once for INTERLACED and once for ALTERNATE. */
for (i = 0; i < G_N_ELEMENTS (formats); i++) {
memset (&fmt, 0, sizeof (fmt));
fmt.type = v4l2object->type;
fmt.fmt.pix.width = width;
fmt.fmt.pix.height = height;
fmt.fmt.pix.pixelformat = pixelformat;
fmt.fmt.pix.field = formats[i];
if (fmt.fmt.pix.field == V4L2_FIELD_ALTERNATE)
fmt.fmt.pix.height /= 2;
/* if skip_try_fmt_probes is set it's up to the caller to filter out the
* formats from the formats requested by peer.
* For this negotiation to work with 'alternate' we need the caps to contain
* the feature so we have an intersection with downstream caps.
*/
if (!v4l2object->skip_try_fmt_probes
&& gst_v4l2_object_try_fmt (v4l2object, &fmt) != 0)
continue;
if (gst_v4l2_object_get_interlace_mode (fmt.fmt.pix.field, &interlace_mode)
&& prev != interlace_mode) {
GValue interlace_enum = { 0, };
const gchar *mode_string;
g_value_init (&interlace_enum, G_TYPE_STRING);
mode_string = gst_video_interlace_mode_to_string (interlace_mode);
g_value_set_string (&interlace_enum, mode_string);
gst_value_list_append_and_take_value (&interlace_formats,
&interlace_enum);
prev = interlace_mode;
}
}
if (gst_v4l2src_value_simplify (&interlace_formats)
|| gst_value_list_get_size (&interlace_formats) > 0)
gst_structure_take_value (s, "interlace-mode", &interlace_formats);
else
GST_WARNING_OBJECT (v4l2object, "Failed to determine interlace mode");
return;
}
static void
gst_v4l2_object_fill_colorimetry_list (GValue * list,
GstVideoColorimetry * cinfo)
{
GValue colorimetry = G_VALUE_INIT;
guint size;
guint i;
gboolean found = FALSE;
g_value_init (&colorimetry, G_TYPE_STRING);
g_value_take_string (&colorimetry, gst_video_colorimetry_to_string (cinfo));
/* only insert if no duplicate */
size = gst_value_list_get_size (list);
for (i = 0; i < size; i++) {
const GValue *tmp;
tmp = gst_value_list_get_value (list, i);
if (gst_value_compare (&colorimetry, tmp) == GST_VALUE_EQUAL) {
found = TRUE;
break;
}
}
if (!found)
gst_value_list_append_and_take_value (list, &colorimetry);
else
g_value_unset (&colorimetry);
}
static void
gst_v4l2_object_add_colorspace (GstV4l2Object * v4l2object, GstStructure * s,
guint32 width, guint32 height, guint32 pixelformat)
{
struct v4l2_format fmt;
GValue list = G_VALUE_INIT;
GstVideoColorimetry cinfo;
enum v4l2_colorspace req_cspace;
memset (&fmt, 0, sizeof (fmt));
fmt.type = v4l2object->type;
fmt.fmt.pix.width = width;
fmt.fmt.pix.height = height;
fmt.fmt.pix.pixelformat = pixelformat;
g_value_init (&list, GST_TYPE_LIST);
/* step 1: get device default colorspace and insert it first as
* it should be the preferred one */
if (gst_v4l2_object_try_fmt (v4l2object, &fmt) == 0) {
if (gst_v4l2_object_get_colorspace (v4l2object, &fmt, &cinfo))
gst_v4l2_object_fill_colorimetry_list (&list, &cinfo);
}
/* step 2: probe all colorspace other than default
* We don't probe all colorspace, range, matrix and transfer combination to
* avoid ioctl flooding which could greatly increase initialization time
* with low-speed devices (UVC...) */
for (req_cspace = V4L2_COLORSPACE_SMPTE170M;
req_cspace <= V4L2_COLORSPACE_RAW; req_cspace++) {
/* V4L2_COLORSPACE_BT878 is deprecated and shall not be used, so skip */
if (req_cspace == V4L2_COLORSPACE_BT878)
continue;
if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type))
fmt.fmt.pix_mp.colorspace = req_cspace;
else
fmt.fmt.pix.colorspace = req_cspace;
if (gst_v4l2_object_try_fmt (v4l2object, &fmt) == 0) {
enum v4l2_colorspace colorspace;
if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type))
colorspace = fmt.fmt.pix_mp.colorspace;
else
colorspace = fmt.fmt.pix.colorspace;
if (colorspace == req_cspace) {
if (gst_v4l2_object_get_colorspace (v4l2object, &fmt, &cinfo))
gst_v4l2_object_fill_colorimetry_list (&list, &cinfo);
}
}
}
if (gst_value_list_get_size (&list) > 0)
gst_structure_take_value (s, "colorimetry", &list);
else
g_value_unset (&list);
return;
}
/* The frame interval enumeration code first appeared in Linux 2.6.19. */
static GstStructure *
gst_v4l2_object_probe_caps_for_format_and_size (GstV4l2Object * v4l2object,
guint32 pixelformat,
guint32 width, guint32 height, const GstStructure * template)
{
gint fd = v4l2object->video_fd;
struct v4l2_frmivalenum ival;
guint32 num, denom;
GstStructure *s;
GValue rates = { 0, };
memset (&ival, 0, sizeof (struct v4l2_frmivalenum));
ival.index = 0;
ival.pixel_format = pixelformat;
ival.width = width;
ival.height = height;
GST_LOG_OBJECT (v4l2object->dbg_obj,
"get frame interval for %ux%u, %" GST_FOURCC_FORMAT, width, height,
GST_FOURCC_ARGS (pixelformat));
/* keep in mind that v4l2 gives us frame intervals (durations); we invert the
* fraction to get framerate */
if (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMEINTERVALS, &ival) < 0)
goto enum_frameintervals_failed;
if (ival.type == V4L2_FRMIVAL_TYPE_DISCRETE) {
GValue rate = { 0, };
g_value_init (&rates, GST_TYPE_LIST);
g_value_init (&rate, GST_TYPE_FRACTION);
do {
num = ival.discrete.numerator;
denom = ival.discrete.denominator;
if (num > G_MAXINT || denom > G_MAXINT) {
/* let us hope we don't get here... */
num >>= 1;
denom >>= 1;
}
GST_LOG_OBJECT (v4l2object->dbg_obj, "adding discrete framerate: %d/%d",
denom, num);
/* swap to get the framerate */
gst_value_set_fraction (&rate, denom, num);
gst_value_list_append_value (&rates, &rate);
ival.index++;
} while (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMEINTERVALS, &ival) >= 0);
} else if (ival.type == V4L2_FRMIVAL_TYPE_STEPWISE) {
GValue min = { 0, };
GValue step = { 0, };
GValue max = { 0, };
gboolean added = FALSE;
guint32 minnum, mindenom;
guint32 maxnum, maxdenom;
g_value_init (&rates, GST_TYPE_LIST);
g_value_init (&min, GST_TYPE_FRACTION);
g_value_init (&step, GST_TYPE_FRACTION);
g_value_init (&max, GST_TYPE_FRACTION);
/* get the min */
minnum = ival.stepwise.min.numerator;
mindenom = ival.stepwise.min.denominator;
if (minnum > G_MAXINT || mindenom > G_MAXINT) {
minnum >>= 1;
mindenom >>= 1;
}
GST_LOG_OBJECT (v4l2object->dbg_obj, "stepwise min frame interval: %d/%d",
minnum, mindenom);
gst_value_set_fraction (&min, minnum, mindenom);
/* get the max */
maxnum = ival.stepwise.max.numerator;
maxdenom = ival.stepwise.max.denominator;
if (maxnum > G_MAXINT || maxdenom > G_MAXINT) {
maxnum >>= 1;
maxdenom >>= 1;
}
GST_LOG_OBJECT (v4l2object->dbg_obj, "stepwise max frame interval: %d/%d",
maxnum, maxdenom);
gst_value_set_fraction (&max, maxnum, maxdenom);
/* get the step */
num = ival.stepwise.step.numerator;
denom = ival.stepwise.step.denominator;
if (num > G_MAXINT || denom > G_MAXINT) {
num >>= 1;
denom >>= 1;
}
if (num == 0 || denom == 0) {
/* in this case we have a wrong fraction or no step, set the step to max
* so that we only add the min value in the loop below */
num = maxnum;
denom = maxdenom;
}
/* since we only have gst_value_fraction_subtract and not add, negate the
* numerator */
GST_LOG_OBJECT (v4l2object->dbg_obj, "stepwise step frame interval: %d/%d",
num, denom);
gst_value_set_fraction (&step, -num, denom);
while (gst_value_compare (&min, &max) != GST_VALUE_GREATER_THAN) {
GValue rate = { 0, };
num = gst_value_get_fraction_numerator (&min);
denom = gst_value_get_fraction_denominator (&min);
GST_LOG_OBJECT (v4l2object->dbg_obj, "adding stepwise framerate: %d/%d",
denom, num);
/* invert to get the framerate */
g_value_init (&rate, GST_TYPE_FRACTION);
gst_value_set_fraction (&rate, denom, num);
gst_value_list_append_value (&rates, &rate);
added = TRUE;
/* we're actually adding because step was negated above. This is because
* there is no _add function... */
if (!gst_value_fraction_subtract (&min, &min, &step)) {
GST_WARNING_OBJECT (v4l2object->dbg_obj, "could not step fraction!");
break;
}
}
if (!added) {
/* no range was added, leave the default range from the template */
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"no range added, leaving default");
g_value_unset (&rates);
}
} else if (ival.type == V4L2_FRMIVAL_TYPE_CONTINUOUS) {
guint32 maxnum, maxdenom;
g_value_init (&rates, GST_TYPE_FRACTION_RANGE);
num = ival.stepwise.min.numerator;
denom = ival.stepwise.min.denominator;
if (num > G_MAXINT || denom > G_MAXINT) {
num >>= 1;
denom >>= 1;
}
maxnum = ival.stepwise.max.numerator;
maxdenom = ival.stepwise.max.denominator;
if (maxnum > G_MAXINT || maxdenom > G_MAXINT) {
maxnum >>= 1;
maxdenom >>= 1;
}
GST_LOG_OBJECT (v4l2object->dbg_obj,
"continuous frame interval %d/%d to %d/%d", maxdenom, maxnum, denom,
num);
gst_value_set_fraction_range_full (&rates, maxdenom, maxnum, denom, num);
} else {
goto unknown_type;
}
return_data:
s = gst_structure_copy (template);
gst_structure_set (s, "width", G_TYPE_INT, (gint) width,
"height", G_TYPE_INT, (gint) height, NULL);
gst_v4l2_object_add_aspect_ratio (v4l2object, s);
if (!v4l2object->skip_try_fmt_probes) {
gst_v4l2_object_add_interlace_mode (v4l2object, s, width, height,
pixelformat);
gst_v4l2_object_add_colorspace (v4l2object, s, width, height, pixelformat);
}
if (G_IS_VALUE (&rates)) {
gst_v4l2src_value_simplify (&rates);
/* only change the framerate on the template when we have a valid probed new
* value */
gst_structure_take_value (s, "framerate", &rates);
} else if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
gst_structure_set (s, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT,
1, NULL);
}
return s;
/* ERRORS */
enum_frameintervals_failed:
{
GST_DEBUG_OBJECT (v4l2object->dbg_obj,
"Unable to enumerate intervals for %" GST_FOURCC_FORMAT "@%ux%u",
GST_FOURCC_ARGS (pixelformat), width, height);
goto return_data;
}
unknown_type:
{
/* I don't see how this is actually an error, we ignore the format then */
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"Unknown frame interval type at %" GST_FOURCC_FORMAT "@%ux%u: %u",
GST_FOURCC_ARGS (pixelformat), width, height, ival.type);
return NULL;
}
}
static gint
sort_by_frame_size (GstStructure * s1, GstStructure * s2)
{
int w1, h1, w2, h2;
gst_structure_get_int (s1, "width", &w1);
gst_structure_get_int (s1, "height", &h1);
gst_structure_get_int (s2, "width", &w2);
gst_structure_get_int (s2, "height", &h2);
/* I think it's safe to assume that this won't overflow for a while */
return ((w2 * h2) - (w1 * h1));
}
static void
check_alternate_and_append_struct (GstCaps * caps, GstStructure * s)
{
const GValue *mode;
mode = gst_structure_get_value (s, "interlace-mode");
if (!mode)
goto done;
if (G_VALUE_HOLDS_STRING (mode)) {
/* Add the INTERLACED feature if the mode is alternate */
if (!g_strcmp0 (gst_structure_get_string (s, "interlace-mode"),
"alternate")) {
GstCapsFeatures *feat;
feat = gst_caps_features_new (GST_CAPS_FEATURE_FORMAT_INTERLACED, NULL);
gst_caps_set_features (caps, gst_caps_get_size (caps) - 1, feat);
}
} else if (GST_VALUE_HOLDS_LIST (mode)) {
/* If the mode is a list containing alternate, remove it from the list and add a
* variant with interlace-mode=alternate and the INTERLACED feature. */
GValue alter = G_VALUE_INIT;
GValue inter = G_VALUE_INIT;
g_value_init (&alter, G_TYPE_STRING);
g_value_set_string (&alter, "alternate");
/* Cannot use gst_value_can_intersect() as it requires args to have the
* same type. */
if (gst_value_intersect (&inter, mode, &alter)) {
GValue minus_alter = G_VALUE_INIT;
GstStructure *copy;
gst_value_subtract (&minus_alter, mode, &alter);
gst_structure_take_value (s, "interlace-mode", &minus_alter);
copy = gst_structure_copy (s);
gst_structure_take_value (copy, "interlace-mode", &inter);
gst_caps_append_structure_full (caps, copy,
gst_caps_features_new (GST_CAPS_FEATURE_FORMAT_INTERLACED, NULL));
}
g_value_unset (&alter);
}
done:
gst_caps_append_structure (caps, s);
}
static void
gst_v4l2_object_update_and_append (GstV4l2Object * v4l2object,
guint32 format, GstCaps * caps, GstStructure * s)
{
GstStructure *alt_s = NULL;
/* Encoded stream on output buffer need to be parsed */
if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
gint i = 0;
for (; i < GST_V4L2_FORMAT_COUNT; i++) {
if (format == gst_v4l2_formats[i].format &&
gst_v4l2_formats[i].flags & GST_V4L2_CODEC &&
!(gst_v4l2_formats[i].flags & GST_V4L2_NO_PARSE)) {
gst_structure_set (s, "parsed", G_TYPE_BOOLEAN, TRUE, NULL);
break;
}
}
}
if (v4l2object->has_alpha_component &&
(v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)) {
switch (format) {
case V4L2_PIX_FMT_RGB32:
alt_s = gst_structure_copy (s);
gst_structure_set (alt_s, "format", G_TYPE_STRING, "ARGB", NULL);
break;
case V4L2_PIX_FMT_BGR32:
alt_s = gst_structure_copy (s);
gst_structure_set (alt_s, "format", G_TYPE_STRING, "BGRA", NULL);
break;
default:
break;
}
}
check_alternate_and_append_struct (caps, s);
if (alt_s) {
check_alternate_and_append_struct (caps, alt_s);
}
}
static GstCaps *
gst_v4l2_object_probe_caps_for_format (GstV4l2Object * v4l2object,
guint32 pixelformat, const GstStructure * template)
{
GstCaps *ret = gst_caps_new_empty ();
GstStructure *tmp;
gint fd = v4l2object->video_fd;
struct v4l2_frmsizeenum size;
GList *results = NULL;
guint32 w, h;
if (pixelformat == GST_MAKE_FOURCC ('M', 'P', 'E', 'G')) {
gst_caps_append_structure (ret, gst_structure_copy (template));
return ret;
}
memset (&size, 0, sizeof (struct v4l2_frmsizeenum));
size.index = 0;
size.pixel_format = pixelformat;
GST_DEBUG_OBJECT (v4l2object->dbg_obj,
"Enumerating frame sizes for %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (pixelformat));
if (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMESIZES, &size) < 0)
goto enum_framesizes_failed;
if (size.type == V4L2_FRMSIZE_TYPE_DISCRETE) {
do {
GST_LOG_OBJECT (v4l2object->dbg_obj, "got discrete frame size %dx%d",
size.discrete.width, size.discrete.height);
w = MIN (size.discrete.width, G_MAXINT);
h = MIN (size.discrete.height, G_MAXINT);
if (w && h) {
tmp =
gst_v4l2_object_probe_caps_for_format_and_size (v4l2object,
pixelformat, w, h, template);
if (tmp)
results = g_list_prepend (results, tmp);
}
size.index++;
} while (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMESIZES, &size) >= 0);
GST_DEBUG_OBJECT (v4l2object->dbg_obj,
"done iterating discrete frame sizes");
} else if (size.type == V4L2_FRMSIZE_TYPE_STEPWISE) {
guint32 maxw, maxh, step_w, step_h;
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "we have stepwise frame sizes:");
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min width: %d",
size.stepwise.min_width);
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
size.stepwise.min_height);
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "max width: %d",
size.stepwise.max_width);
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
size.stepwise.max_height);
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "step width: %d",
size.stepwise.step_width);
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "step height: %d",
size.stepwise.step_height);
w = MAX (size.stepwise.min_width, 1);
h = MAX (size.stepwise.min_height, 1);
maxw = MIN (size.stepwise.max_width, G_MAXINT);
maxh = MIN (size.stepwise.max_height, G_MAXINT);
step_w = MAX (size.stepwise.step_width, 1);
step_h = MAX (size.stepwise.step_height, 1);
/* FIXME: check for sanity and that min/max are multiples of the steps */
/* we only query details for the max width/height since it's likely the
* most restricted if there are any resolution-dependent restrictions */
tmp = gst_v4l2_object_probe_caps_for_format_and_size (v4l2object,
pixelformat, maxw, maxh, template);
if (tmp) {
GValue step_range = G_VALUE_INIT;
g_value_init (&step_range, GST_TYPE_INT_RANGE);
gst_value_set_int_range_step (&step_range, w, maxw, step_w);
gst_structure_set_value (tmp, "width", &step_range);
gst_value_set_int_range_step (&step_range, h, maxh, step_h);
gst_structure_take_value (tmp, "height", &step_range);
/* no point using the results list here, since there's only one struct */
gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret, tmp);
}
} else if (size.type == V4L2_FRMSIZE_TYPE_CONTINUOUS) {
guint32 maxw, maxh;
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "we have continuous frame sizes:");
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min width: %d",
size.stepwise.min_width);
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
size.stepwise.min_height);
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "max width: %d",
size.stepwise.max_width);
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
size.stepwise.max_height);
w = MAX (size.stepwise.min_width, 1);
h = MAX (size.stepwise.min_height, 1);
maxw = MIN (size.stepwise.max_width, G_MAXINT);
maxh = MIN (size.stepwise.max_height, G_MAXINT);
tmp =
gst_v4l2_object_probe_caps_for_format_and_size (v4l2object, pixelformat,
w, h, template);
if (tmp) {
gst_structure_set (tmp, "width", GST_TYPE_INT_RANGE, (gint) w,
(gint) maxw, "height", GST_TYPE_INT_RANGE, (gint) h, (gint) maxh,
NULL);
/* no point using the results list here, since there's only one struct */
gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret, tmp);
}
} else {
goto unknown_type;
}
/* we use an intermediary list to store and then sort the results of the
* probing because we can't make any assumptions about the order in which
* the driver will give us the sizes, but we want the final caps to contain
* the results starting with the highest resolution and having the lowest
* resolution last, since order in caps matters for things like fixation. */
results = g_list_sort (results, (GCompareFunc) sort_by_frame_size);
while (results != NULL) {
gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret,
results->data);
results = g_list_delete_link (results, results);
}
if (gst_caps_is_empty (ret))
goto enum_framesizes_no_results;
return ret;
/* ERRORS */
enum_framesizes_failed:
{
/* I don't see how this is actually an error */
GST_DEBUG_OBJECT (v4l2object->dbg_obj,
"Failed to enumerate frame sizes for pixelformat %" GST_FOURCC_FORMAT
" (%s)", GST_FOURCC_ARGS (pixelformat), g_strerror (errno));
goto default_frame_sizes;
}
enum_framesizes_no_results:
{
/* it's possible that VIDIOC_ENUM_FRAMESIZES is defined but the driver in
* question doesn't actually support it yet */
GST_DEBUG_OBJECT (v4l2object->dbg_obj,
"No results for pixelformat %" GST_FOURCC_FORMAT
" enumerating frame sizes, trying fallback",
GST_FOURCC_ARGS (pixelformat));
goto default_frame_sizes;
}
unknown_type:
{
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"Unknown frame sizeenum type for pixelformat %" GST_FOURCC_FORMAT
": %u", GST_FOURCC_ARGS (pixelformat), size.type);
goto default_frame_sizes;
}
default_frame_sizes:
{
gint min_w, max_w, min_h, max_h, fix_num = 0, fix_denom = 0;
/* This code is for Linux < 2.6.19 */
min_w = min_h = 1;
max_w = max_h = GST_V4L2_MAX_SIZE;
if (!gst_v4l2_object_get_nearest_size (v4l2object, pixelformat, &min_w,
&min_h)) {
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"Could not probe minimum capture size for pixelformat %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (pixelformat));
}
if (!gst_v4l2_object_get_nearest_size (v4l2object, pixelformat, &max_w,
&max_h)) {
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"Could not probe maximum capture size for pixelformat %"
GST_FOURCC_FORMAT, GST_FOURCC_ARGS (pixelformat));
}
if (min_w == 0 || min_h == 0)
min_w = min_h = 1;
if (max_w == 0 || max_h == 0)
max_w = max_h = GST_V4L2_MAX_SIZE;
/* Since we can't get framerate directly, try to use the current norm */
if (v4l2object->tv_norm && v4l2object->norms) {
GList *norms;
GstTunerNorm *norm = NULL;
GstTunerNorm *current =
gst_v4l2_tuner_get_norm_by_std_id (v4l2object, v4l2object->tv_norm);
for (norms = v4l2object->norms; norms != NULL; norms = norms->next) {
norm = (GstTunerNorm *) norms->data;
if (!strcmp (norm->label, current->label))
break;
}
/* If it's possible, set framerate to that (discrete) value */
if (norm) {
fix_num = gst_value_get_fraction_numerator (&norm->framerate);
fix_denom = gst_value_get_fraction_denominator (&norm->framerate);
}
}
tmp = gst_structure_copy (template);
if (fix_num) {
gst_structure_set (tmp, "framerate", GST_TYPE_FRACTION, fix_num,
fix_denom, NULL);
} else if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
/* if norm can't be used, copy the template framerate */
gst_structure_set (tmp, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1,
G_MAXINT, 1, NULL);
}
if (min_w == max_w)
gst_structure_set (tmp, "width", G_TYPE_INT, max_w, NULL);
else
gst_structure_set (tmp, "width", GST_TYPE_INT_RANGE, min_w, max_w, NULL);
if (min_h == max_h)
gst_structure_set (tmp, "height", G_TYPE_INT, max_h, NULL);
else
gst_structure_set (tmp, "height", GST_TYPE_INT_RANGE, min_h, max_h, NULL);
gst_v4l2_object_add_aspect_ratio (v4l2object, tmp);
/* We could consider setting interlace mode from min and max. */
gst_v4l2_object_add_interlace_mode (v4l2object, tmp, max_w, max_h,
pixelformat);
if (!v4l2object->skip_try_fmt_probes) {
gint probed_w, probed_h;
if (v4l2object->info.width >= min_w && v4l2object->info.width <= max_w &&
v4l2object->info.height >= min_h
&& v4l2object->info.height <= max_h) {
probed_w = v4l2object->info.width;
probed_h = v4l2object->info.height;
} else {
probed_w = max_w;
probed_h = max_h;
}
/* We could consider to check colorspace for min too, in case it depends on
* the size. But in this case, min and max could not be enough */
gst_v4l2_object_add_colorspace (v4l2object, tmp, probed_w, probed_h,
pixelformat);
}
gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret, tmp);
return ret;
}
}
static gboolean
gst_v4l2_object_get_nearest_size (GstV4l2Object * v4l2object,
guint32 pixelformat, gint * width, gint * height)
{
struct v4l2_format fmt;
gboolean ret = FALSE;
GstVideoInterlaceMode interlace_mode;
g_return_val_if_fail (width != NULL, FALSE);
g_return_val_if_fail (height != NULL, FALSE);
GST_LOG_OBJECT (v4l2object->dbg_obj,
"getting nearest size to %dx%d with format %" GST_FOURCC_FORMAT,
*width, *height, GST_FOURCC_ARGS (pixelformat));
memset (&fmt, 0, sizeof (struct v4l2_format));
/* get size delimiters */
memset (&fmt, 0, sizeof (fmt));
fmt.type = v4l2object->type;
fmt.fmt.pix.width = *width;
fmt.fmt.pix.height = *height;
fmt.fmt.pix.pixelformat = pixelformat;
fmt.fmt.pix.field = V4L2_FIELD_ANY;
if (gst_v4l2_object_try_fmt (v4l2object, &fmt) < 0)
goto error;
GST_LOG_OBJECT (v4l2object->dbg_obj,
"got nearest size %dx%d", fmt.fmt.pix.width, fmt.fmt.pix.height);
*width = fmt.fmt.pix.width;
*height = fmt.fmt.pix.height;
if (!gst_v4l2_object_get_interlace_mode (fmt.fmt.pix.field, &interlace_mode)) {
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"Unsupported field type for %" GST_FOURCC_FORMAT "@%ux%u: %u",
GST_FOURCC_ARGS (pixelformat), *width, *height, fmt.fmt.pix.field);
goto error;
}
ret = TRUE;
error:
if (!ret) {
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"Unable to try format: %s", g_strerror (errno));
}
return ret;
}
static gboolean
gst_v4l2_object_is_dmabuf_supported (GstV4l2Object * v4l2object)
{
gboolean ret = TRUE;
struct v4l2_exportbuffer expbuf = {
.type = v4l2object->type,
.index = -1,
.plane = -1,
.flags = O_CLOEXEC | O_RDWR,
};
if (v4l2object->fmtdesc &&
v4l2object->fmtdesc->flags & V4L2_FMT_FLAG_EMULATED) {
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"libv4l2 converter detected, disabling DMABuf");
ret = FALSE;
}
/* Expected to fail, but ENOTTY tells us that it is not implemented. */
v4l2object->ioctl (v4l2object->video_fd, VIDIOC_EXPBUF, &expbuf);
if (errno == ENOTTY)
ret = FALSE;
return ret;
}
static gboolean
gst_v4l2_object_setup_pool (GstV4l2Object * v4l2object, GstCaps * caps)
{
GstV4l2IOMode mode;
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "initializing the %s system",
V4L2_TYPE_IS_OUTPUT (v4l2object->type) ? "output" : "capture");
GST_V4L2_CHECK_OPEN (v4l2object);
GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
/* find transport */
mode = v4l2object->req_mode;
if (v4l2object->device_caps & V4L2_CAP_READWRITE) {
if (v4l2object->req_mode == GST_V4L2_IO_AUTO)
mode = GST_V4L2_IO_RW;
} else if (v4l2object->req_mode == GST_V4L2_IO_RW)
goto method_not_supported;
if (v4l2object->device_caps & V4L2_CAP_STREAMING) {
if (v4l2object->req_mode == GST_V4L2_IO_AUTO) {
if (!V4L2_TYPE_IS_OUTPUT (v4l2object->type) &&
gst_v4l2_object_is_dmabuf_supported (v4l2object)) {
mode = GST_V4L2_IO_DMABUF;
} else {
mode = GST_V4L2_IO_MMAP;
}
}
} else if (v4l2object->req_mode == GST_V4L2_IO_MMAP ||
v4l2object->req_mode == GST_V4L2_IO_DMABUF)
goto method_not_supported;
/* if still no transport selected, error out */
if (mode == GST_V4L2_IO_AUTO)
goto no_supported_capture_method;
GST_INFO_OBJECT (v4l2object->dbg_obj, "accessing buffers via mode %d", mode);
v4l2object->mode = mode;
/* If min_buffers is not set, the driver either does not support the control or
it has not been asked yet via propose_allocation/decide_allocation. */
if (!v4l2object->min_buffers)
gst_v4l2_get_driver_min_buffers (v4l2object);
/* Map the buffers */
GST_LOG_OBJECT (v4l2object->dbg_obj, "initiating buffer pool");
if (!(v4l2object->pool = gst_v4l2_buffer_pool_new (v4l2object, caps)))
goto buffer_pool_new_failed;
GST_V4L2_SET_ACTIVE (v4l2object);
return TRUE;
/* ERRORS */
buffer_pool_new_failed:
{
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, READ,
(_("Could not map buffers from device '%s'"),
v4l2object->videodev),
("Failed to create buffer pool: %s", g_strerror (errno)));
return FALSE;
}
method_not_supported:
{
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, READ,
(_("The driver of device '%s' does not support the IO method %d"),
v4l2object->videodev, mode), (NULL));
return FALSE;
}
no_supported_capture_method:
{
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, READ,
(_("The driver of device '%s' does not support any known IO "
"method."), v4l2object->videodev), (NULL));
return FALSE;
}
}
static void
gst_v4l2_object_set_stride (GstVideoInfo * info, GstVideoAlignment * align,
gint plane, gint stride)
{
const GstVideoFormatInfo *finfo = info->finfo;
if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
gint x_tiles, y_tiles, ws, hs, tile_height, padded_height;
ws = GST_VIDEO_FORMAT_INFO_TILE_WS (finfo);
hs = GST_VIDEO_FORMAT_INFO_TILE_HS (finfo);
tile_height = 1 << hs;
padded_height = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, plane,
info->height + align->padding_top + align->padding_bottom);
padded_height = GST_ROUND_UP_N (padded_height, tile_height);
x_tiles = stride >> ws;
y_tiles = padded_height >> hs;
info->stride[plane] = GST_VIDEO_TILE_MAKE_STRIDE (x_tiles, y_tiles);
} else {
info->stride[plane] = stride;
}
}
static void
gst_v4l2_object_extrapolate_info (GstV4l2Object * v4l2object,
GstVideoInfo * info, GstVideoAlignment * align, gint stride)
{
const GstVideoFormatInfo *finfo = info->finfo;
gint i, estride, padded_height;
gsize offs = 0;
g_return_if_fail (v4l2object->n_v4l2_planes == 1);
padded_height =
GST_VIDEO_INFO_FIELD_HEIGHT (info) + align->padding_top +
align->padding_bottom;
for (i = 0; i < finfo->n_planes; i++) {
estride = gst_v4l2_object_extrapolate_stride (finfo, i, stride);
gst_v4l2_object_set_stride (info, align, i, estride);
info->offset[i] = offs;
offs += estride *
GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, i, padded_height);
GST_DEBUG_OBJECT (v4l2object->dbg_obj,
"Extrapolated for plane %d with base stride %d: "
"stride %d, offset %" G_GSIZE_FORMAT, i, stride, info->stride[i],
info->offset[i]);
}
/* Update the image size according the amount of data we are going to
* read/write. This workaround bugs in driver where the sizeimage provided
* by TRY/S_FMT represent the buffer length (maximum size) rather then the expected
* bytesused (buffer size). */
if (offs < info->size)
info->size = offs;
}
static void
gst_v4l2_object_save_format (GstV4l2Object * v4l2object,
struct v4l2_fmtdesc *fmtdesc, struct v4l2_format *format,
GstVideoInfo * info, GstVideoAlignment * align)
{
const GstVideoFormatInfo *finfo = info->finfo;
gboolean standard_stride = TRUE;
gint stride, pstride, padded_width, padded_height, i;
if (GST_VIDEO_INFO_FORMAT (info) == GST_VIDEO_FORMAT_ENCODED) {
v4l2object->n_v4l2_planes = 1;
info->size = format->fmt.pix.sizeimage;
goto store_info;
}
/* adjust right padding */
if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type))
stride = format->fmt.pix_mp.plane_fmt[0].bytesperline;
else
stride = format->fmt.pix.bytesperline;
pstride = GST_VIDEO_FORMAT_INFO_PSTRIDE (finfo, 0);
if (pstride) {
padded_width = stride / pstride;
} else {
/* pstride can be 0 for complex formats */
GST_WARNING_OBJECT (v4l2object->element,
"format %s has a pstride of 0, cannot compute padded with",
gst_video_format_to_string (GST_VIDEO_INFO_FORMAT (info)));
padded_width = stride;
}
if (padded_width < format->fmt.pix.width)
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"Driver bug detected, stride (%d) is too small for the width (%d)",
padded_width, format->fmt.pix.width);
align->padding_right = padded_width - info->width - align->padding_left;
/* adjust bottom padding */
padded_height = format->fmt.pix.height;
if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
guint hs, tile_height;
hs = GST_VIDEO_FORMAT_INFO_TILE_HS (finfo);
tile_height = 1 << hs;
padded_height = GST_ROUND_UP_N (padded_height, tile_height);
}
align->padding_bottom =
padded_height - GST_VIDEO_INFO_FIELD_HEIGHT (info) - align->padding_top;
/* setup the strides and offset */
if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type)) {
struct v4l2_pix_format_mplane *pix_mp = &format->fmt.pix_mp;
/* figure out the frame layout */
v4l2object->n_v4l2_planes = MAX (1, pix_mp->num_planes);
info->size = 0;
for (i = 0; i < v4l2object->n_v4l2_planes; i++) {
stride = pix_mp->plane_fmt[i].bytesperline;
if (info->stride[i] != stride)
standard_stride = FALSE;
gst_v4l2_object_set_stride (info, align, i, stride);
info->offset[i] = info->size;
info->size += pix_mp->plane_fmt[i].sizeimage;
}
/* Extrapolate stride if planar format are being set in 1 v4l2 plane */
if (v4l2object->n_v4l2_planes < finfo->n_planes) {
stride = format->fmt.pix_mp.plane_fmt[0].bytesperline;
gst_v4l2_object_extrapolate_info (v4l2object, info, align, stride);
}
} else {
/* only one plane in non-MPLANE mode */
v4l2object->n_v4l2_planes = 1;
info->size = format->fmt.pix.sizeimage;
stride = format->fmt.pix.bytesperline;
if (info->stride[0] != stride)
standard_stride = FALSE;
gst_v4l2_object_extrapolate_info (v4l2object, info, align, stride);
}
/* adjust the offset to take into account left and top */
if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
if ((align->padding_left + align->padding_top) > 0)
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"Left and top padding is not permitted for tiled formats");
} else {
for (i = 0; i < finfo->n_planes; i++) {
gint vedge, hedge;
/* FIXME we assume plane as component as this is true for all supported
* format we support. */
hedge = GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (finfo, i, align->padding_left);
vedge = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, i, align->padding_top);
info->offset[i] += (vedge * info->stride[i]) +
(hedge * GST_VIDEO_INFO_COMP_PSTRIDE (info, i));
}
}
store_info:
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got sizeimage %" G_GSIZE_FORMAT,
info->size);
/* to avoid copies we need video meta if there is padding */
v4l2object->need_video_meta =
((align->padding_top + align->padding_left + align->padding_right +
align->padding_bottom) != 0);
/* ... or if stride is non "standard" */
if (!standard_stride)
v4l2object->need_video_meta = TRUE;
/* ... or also video meta if we use multiple, non-contiguous, planes */
if (v4l2object->n_v4l2_planes > 1)
v4l2object->need_video_meta = TRUE;
v4l2object->info = *info;
v4l2object->align = *align;
v4l2object->format = *format;
v4l2object->fmtdesc = fmtdesc;
/* if we have a framerate pre-calculate duration */
if (info->fps_n > 0 && info->fps_d > 0) {
v4l2object->duration = gst_util_uint64_scale_int (GST_SECOND, info->fps_d,
info->fps_n);
if (GST_VIDEO_INFO_INTERLACE_MODE (info) ==
GST_VIDEO_INTERLACE_MODE_ALTERNATE)
v4l2object->duration /= 2;
} else {
v4l2object->duration = GST_CLOCK_TIME_NONE;
}
}
gint
gst_v4l2_object_extrapolate_stride (const GstVideoFormatInfo * finfo,
gint plane, gint stride)
{
gint estride;
switch (finfo->format) {
case GST_VIDEO_FORMAT_NV12:
case GST_VIDEO_FORMAT_NV12_64Z32:
case GST_VIDEO_FORMAT_NV21:
case GST_VIDEO_FORMAT_NV16:
case GST_VIDEO_FORMAT_NV61:
case GST_VIDEO_FORMAT_NV24:
estride = (plane == 0 ? 1 : 2) *
GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (finfo, plane, stride);
break;
default:
estride = GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (finfo, plane, stride);
break;
}
return estride;
}
static enum v4l2_field
get_v4l2_field_for_info (GstVideoInfo * info)
{
if (!GST_VIDEO_INFO_IS_INTERLACED (info))
return V4L2_FIELD_NONE;
if (GST_VIDEO_INFO_INTERLACE_MODE (info) ==
GST_VIDEO_INTERLACE_MODE_ALTERNATE)
return V4L2_FIELD_ALTERNATE;
switch (GST_VIDEO_INFO_FIELD_ORDER (info)) {
case GST_VIDEO_FIELD_ORDER_TOP_FIELD_FIRST:
return V4L2_FIELD_INTERLACED_TB;
case GST_VIDEO_FIELD_ORDER_BOTTOM_FIELD_FIRST:
return V4L2_FIELD_INTERLACED_BT;
case GST_VIDEO_FIELD_ORDER_UNKNOWN:
default:
return V4L2_FIELD_INTERLACED;
}
}
static gboolean
gst_v4l2_video_colorimetry_matches (const GstVideoColorimetry * cinfo,
GstCaps * caps)
{
GstVideoInfo info;
static const GstVideoColorimetry ci_likely_jpeg = {
GST_VIDEO_COLOR_RANGE_0_255, GST_VIDEO_COLOR_MATRIX_BT601,
GST_VIDEO_TRANSFER_UNKNOWN, GST_VIDEO_COLOR_PRIMARIES_UNKNOWN
};
static const GstVideoColorimetry ci_jpeg = {
GST_VIDEO_COLOR_RANGE_0_255, GST_VIDEO_COLOR_MATRIX_BT601,
GST_VIDEO_TRANSFER_SRGB, GST_VIDEO_COLOR_PRIMARIES_BT709
};
if (!gst_video_info_from_caps (&info, caps))
return FALSE;
/* if colorimetry in caps is unknown, use the default one */
if (info.colorimetry.primaries == GST_VIDEO_COLOR_PRIMARIES_UNKNOWN)
info.colorimetry.primaries = cinfo->primaries;
if (info.colorimetry.range == GST_VIDEO_COLOR_RANGE_UNKNOWN)
info.colorimetry.range = cinfo->range;
if (info.colorimetry.matrix == GST_VIDEO_COLOR_MATRIX_UNKNOWN)
info.colorimetry.matrix = cinfo->matrix;
if (info.colorimetry.transfer == GST_VIDEO_TRANSFER_UNKNOWN)
info.colorimetry.transfer = cinfo->transfer;
if (gst_video_colorimetry_is_equal (&info.colorimetry, cinfo))
return TRUE;
/* Allow 1:4:0:0 (produced by jpegdec) if the device expects 1:4:7:1 */
if (gst_video_colorimetry_is_equal (&info.colorimetry, &ci_likely_jpeg)
&& gst_video_colorimetry_is_equal (cinfo, &ci_jpeg))
return TRUE;
return FALSE;
}
static const gchar *
field_to_str (enum v4l2_field f)
{
switch (f) {
case V4L2_FIELD_ANY:
return "any";
case V4L2_FIELD_NONE:
return "none";
case V4L2_FIELD_TOP:
return "top";
case V4L2_FIELD_BOTTOM:
return "bottom";
case V4L2_FIELD_INTERLACED:
return "interlaced";
case V4L2_FIELD_SEQ_TB:
return "seq-tb";
case V4L2_FIELD_SEQ_BT:
return "seq-bt";
case V4L2_FIELD_ALTERNATE:
return "alternate";
case V4L2_FIELD_INTERLACED_TB:
return "interlaced-tb";
case V4L2_FIELD_INTERLACED_BT:
return "interlaced-bt";
}
return "unknown";
}
static gboolean
gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
gboolean try_only, GstV4l2Error * error)
{
gint fd = v4l2object->video_fd;
struct v4l2_format format;
struct v4l2_streamparm streamparm;
enum v4l2_field field;
guint32 pixelformat;
struct v4l2_fmtdesc *fmtdesc;
GstVideoInfo info;
GstVideoAlignment align;
gint width, height, fps_n, fps_d;
gint n_v4l_planes;
gint i = 0;
gboolean is_mplane;
enum v4l2_colorspace colorspace = 0;
enum v4l2_quantization range = 0;
enum v4l2_ycbcr_encoding matrix = 0;
enum v4l2_xfer_func transfer = 0;
GstStructure *s;
gboolean disable_interlacing = FALSE;
gboolean disable_colorimetry = FALSE;
g_return_val_if_fail (!v4l2object->skip_try_fmt_probes ||
gst_caps_is_writable (caps), FALSE);
GST_V4L2_CHECK_OPEN (v4l2object);
if (!try_only)
GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
is_mplane = V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type);
gst_video_info_init (&info);
gst_video_alignment_reset (&align);
v4l2object->transfer = GST_VIDEO_TRANSFER_UNKNOWN;
if (!gst_v4l2_object_get_caps_info (v4l2object, caps, &fmtdesc, &info))
goto invalid_caps;
pixelformat = fmtdesc->pixelformat;
width = GST_VIDEO_INFO_WIDTH (&info);
height = GST_VIDEO_INFO_FIELD_HEIGHT (&info);
fps_n = GST_VIDEO_INFO_FPS_N (&info);
fps_d = GST_VIDEO_INFO_FPS_D (&info);
/* if encoded format (GST_VIDEO_INFO_N_PLANES return 0)
* or if contiguous is preferred */
n_v4l_planes = GST_VIDEO_INFO_N_PLANES (&info);
if (!n_v4l_planes || !v4l2object->prefered_non_contiguous)
n_v4l_planes = 1;
field = get_v4l2_field_for_info (&info);
if (field != V4L2_FIELD_NONE)
GST_DEBUG_OBJECT (v4l2object->element, "interlaced video");
else
GST_DEBUG_OBJECT (v4l2object->element, "progressive video");
/* We first pick the main colorspace from the primaries */
switch (info.colorimetry.primaries) {
case GST_VIDEO_COLOR_PRIMARIES_BT709:
/* There is two colorspaces using these primaries, use the range to
* differentiate */
if (info.colorimetry.range == GST_VIDEO_COLOR_RANGE_16_235)
colorspace = V4L2_COLORSPACE_REC709;
else
colorspace = V4L2_COLORSPACE_SRGB;
break;
case GST_VIDEO_COLOR_PRIMARIES_BT2020:
colorspace = V4L2_COLORSPACE_BT2020;
break;
case GST_VIDEO_COLOR_PRIMARIES_BT470M:
colorspace = V4L2_COLORSPACE_470_SYSTEM_M;
break;
case GST_VIDEO_COLOR_PRIMARIES_BT470BG:
colorspace = V4L2_COLORSPACE_470_SYSTEM_BG;
break;
case GST_VIDEO_COLOR_PRIMARIES_SMPTE170M:
colorspace = V4L2_COLORSPACE_SMPTE170M;
break;
case GST_VIDEO_COLOR_PRIMARIES_SMPTE240M:
colorspace = V4L2_COLORSPACE_SMPTE240M;
break;
case GST_VIDEO_COLOR_PRIMARIES_FILM:
case GST_VIDEO_COLOR_PRIMARIES_UNKNOWN:
/* We don't know, we will guess */
break;
default:
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"Unknown colorimetry primaries %d", info.colorimetry.primaries);
break;
}
switch (info.colorimetry.range) {
case GST_VIDEO_COLOR_RANGE_0_255:
range = V4L2_QUANTIZATION_FULL_RANGE;
break;
case GST_VIDEO_COLOR_RANGE_16_235:
range = V4L2_QUANTIZATION_LIM_RANGE;
break;
case GST_VIDEO_COLOR_RANGE_UNKNOWN:
/* We let the driver pick a default one */
break;
default:
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"Unknown colorimetry range %d", info.colorimetry.range);
break;
}
switch (info.colorimetry.matrix) {
case GST_VIDEO_COLOR_MATRIX_RGB:
/* Unspecified, leave to default */
break;
/* FCC is about the same as BT601 with less digit */
case GST_VIDEO_COLOR_MATRIX_FCC:
case GST_VIDEO_COLOR_MATRIX_BT601:
matrix = V4L2_YCBCR_ENC_601;
break;
case GST_VIDEO_COLOR_MATRIX_BT709:
matrix = V4L2_YCBCR_ENC_709;
break;
case GST_VIDEO_COLOR_MATRIX_SMPTE240M:
matrix = V4L2_YCBCR_ENC_SMPTE240M;
break;
case GST_VIDEO_COLOR_MATRIX_BT2020:
matrix = V4L2_YCBCR_ENC_BT2020;
break;
case GST_VIDEO_COLOR_MATRIX_UNKNOWN:
/* We let the driver pick a default one */
break;
default:
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"Unknown colorimetry matrix %d", info.colorimetry.matrix);
break;
}
switch (info.colorimetry.transfer) {
case GST_VIDEO_TRANSFER_GAMMA18:
case GST_VIDEO_TRANSFER_GAMMA20:
case GST_VIDEO_TRANSFER_GAMMA22:
case GST_VIDEO_TRANSFER_GAMMA28:
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"GAMMA 18, 20, 22, 28 transfer functions not supported");
/* fallthrough */
case GST_VIDEO_TRANSFER_GAMMA10:
transfer = V4L2_XFER_FUNC_NONE;
break;
case GST_VIDEO_TRANSFER_SMPTE2084:
transfer = V4L2_XFER_FUNC_SMPTE2084;
break;
case GST_VIDEO_TRANSFER_BT601:
case GST_VIDEO_TRANSFER_BT2020_12:
case GST_VIDEO_TRANSFER_BT2020_10:
case GST_VIDEO_TRANSFER_BT709:
v4l2object->transfer = info.colorimetry.transfer;
transfer = V4L2_XFER_FUNC_709;
break;
case GST_VIDEO_TRANSFER_SMPTE240M:
transfer = V4L2_XFER_FUNC_SMPTE240M;
break;
case GST_VIDEO_TRANSFER_SRGB:
transfer = V4L2_XFER_FUNC_SRGB;
break;
case GST_VIDEO_TRANSFER_LOG100:
case GST_VIDEO_TRANSFER_LOG316:
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"LOG 100, 316 transfer functions not supported");
/* FIXME No known sensible default, maybe AdobeRGB ? */
break;
case GST_VIDEO_TRANSFER_UNKNOWN:
/* We let the driver pick a default one */
break;
default:
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"Unknown colorimetry transfer %d", info.colorimetry.transfer);
break;
}
if (colorspace == 0) {
/* Try to guess colorspace according to pixelformat and size */
if (GST_VIDEO_INFO_IS_YUV (&info)) {
if (range == V4L2_QUANTIZATION_FULL_RANGE
&& matrix == V4L2_YCBCR_ENC_601 && transfer == 0) {
/* Full range BT.601 YCbCr encoding with unknown primaries and transfer
* function most likely is JPEG */
colorspace = V4L2_COLORSPACE_JPEG;
transfer = V4L2_XFER_FUNC_SRGB;
} else {
/* SD streams likely use SMPTE170M and HD streams REC709 */
if (width <= 720 && GST_VIDEO_INFO_HEIGHT (&info) <= 576)
colorspace = V4L2_COLORSPACE_SMPTE170M;
else
colorspace = V4L2_COLORSPACE_REC709;
}
} else if (GST_VIDEO_INFO_IS_RGB (&info)) {
colorspace = V4L2_COLORSPACE_SRGB;
transfer = V4L2_XFER_FUNC_NONE;
}
}
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired format %dx%d, format "
"%" GST_FOURCC_FORMAT " stride: %d", width, height,
GST_FOURCC_ARGS (pixelformat), GST_VIDEO_INFO_PLANE_STRIDE (&info, 0));
memset (&format, 0x00, sizeof (struct v4l2_format));
format.type = v4l2object->type;
if (is_mplane) {
format.type = v4l2object->type;
format.fmt.pix_mp.pixelformat = pixelformat;
format.fmt.pix_mp.width = width;
format.fmt.pix_mp.height = height;
format.fmt.pix_mp.field = field;
format.fmt.pix_mp.num_planes = n_v4l_planes;
/* try to ask our preferred stride but it's not a failure if not
* accepted */
for (i = 0; i < n_v4l_planes; i++) {
gint stride = GST_VIDEO_INFO_PLANE_STRIDE (&info, i);
if (GST_VIDEO_FORMAT_INFO_IS_TILED (info.finfo))
stride = GST_VIDEO_TILE_X_TILES (stride) <<
GST_VIDEO_FORMAT_INFO_TILE_WS (info.finfo);
format.fmt.pix_mp.plane_fmt[i].bytesperline = stride;
}
if (GST_VIDEO_INFO_FORMAT (&info) == GST_VIDEO_FORMAT_ENCODED)
format.fmt.pix_mp.plane_fmt[0].sizeimage = ENCODED_BUFFER_SIZE;
} else {
gint stride = GST_VIDEO_INFO_PLANE_STRIDE (&info, 0);
format.type = v4l2object->type;
format.fmt.pix.width = width;
format.fmt.pix.height = height;
format.fmt.pix.pixelformat = pixelformat;
format.fmt.pix.field = field;
if (GST_VIDEO_FORMAT_INFO_IS_TILED (info.finfo))
stride = GST_VIDEO_TILE_X_TILES (stride) <<
GST_VIDEO_FORMAT_INFO_TILE_WS (info.finfo);
/* try to ask our preferred stride */
format.fmt.pix.bytesperline = stride;
if (GST_VIDEO_INFO_FORMAT (&info) == GST_VIDEO_FORMAT_ENCODED)
format.fmt.pix.sizeimage = ENCODED_BUFFER_SIZE;
}
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired format is %dx%d, format "
"%" GST_FOURCC_FORMAT ", nb planes %d", format.fmt.pix.width,
format.fmt.pix_mp.height,
GST_FOURCC_ARGS (format.fmt.pix.pixelformat),
is_mplane ? format.fmt.pix_mp.num_planes : 1);
#ifndef GST_DISABLE_GST_DEBUG
if (is_mplane) {
for (i = 0; i < format.fmt.pix_mp.num_planes; i++)
GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d",
format.fmt.pix_mp.plane_fmt[i].bytesperline);
} else {
GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d",
format.fmt.pix.bytesperline);
}
#endif
if (is_mplane) {
format.fmt.pix_mp.colorspace = colorspace;
format.fmt.pix_mp.quantization = range;
format.fmt.pix_mp.ycbcr_enc = matrix;
format.fmt.pix_mp.xfer_func = transfer;
} else {
format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
format.fmt.pix.colorspace = colorspace;
format.fmt.pix.quantization = range;
format.fmt.pix.ycbcr_enc = matrix;
format.fmt.pix.xfer_func = transfer;
}
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired colorspace is %d:%d:%d:%d",
colorspace, range, matrix, transfer);
if (try_only) {
if (v4l2object->ioctl (fd, VIDIOC_TRY_FMT, &format) < 0)
goto try_fmt_failed;
} else {
if (v4l2object->ioctl (fd, VIDIOC_S_FMT, &format) < 0)
goto set_fmt_failed;
}
if (is_mplane) {
colorspace = format.fmt.pix_mp.colorspace;
range = format.fmt.pix_mp.quantization;
matrix = format.fmt.pix_mp.ycbcr_enc;
transfer = format.fmt.pix_mp.xfer_func;
} else {
colorspace = format.fmt.pix.colorspace;
range = format.fmt.pix.quantization;
matrix = format.fmt.pix.ycbcr_enc;
transfer = format.fmt.pix.xfer_func;
}
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got format of %dx%d, format "
"%" GST_FOURCC_FORMAT ", nb planes %d, colorspace %d:%d:%d:%d field: %s",
format.fmt.pix.width, format.fmt.pix_mp.height,
GST_FOURCC_ARGS (format.fmt.pix.pixelformat),
is_mplane ? format.fmt.pix_mp.num_planes : 1,
colorspace, range, matrix, transfer, field_to_str (format.fmt.pix.field));
#ifndef GST_DISABLE_GST_DEBUG
if (is_mplane) {
for (i = 0; i < format.fmt.pix_mp.num_planes; i++)
GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d, sizeimage %d",
format.fmt.pix_mp.plane_fmt[i].bytesperline,
format.fmt.pix_mp.plane_fmt[i].sizeimage);
} else {
GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d, sizeimage %d",
format.fmt.pix.bytesperline, format.fmt.pix.sizeimage);
}
#endif
if (format.fmt.pix.pixelformat != pixelformat)
goto invalid_pixelformat;
/* Only negotiate size with raw data.
* For some codecs the dimensions are *not* in the bitstream, IIRC VC1
* in ASF mode for example, there is also not reason for a driver to
* change the size. */
if (info.finfo->format != GST_VIDEO_FORMAT_ENCODED) {
/* We can crop larger images */
if (format.fmt.pix.width < width || format.fmt.pix.height < height)
goto invalid_dimensions;
/* Note, this will be adjusted if upstream has non-centered cropping. */
align.padding_top = 0;
align.padding_bottom = format.fmt.pix.height - height;
align.padding_left = 0;
align.padding_right = format.fmt.pix.width - width;
}
if (is_mplane && format.fmt.pix_mp.num_planes != n_v4l_planes)
goto invalid_planes;
/* used to check colorimetry and interlace mode fields presence */
s = gst_caps_get_structure (caps, 0);
if (gst_v4l2_object_get_interlace_mode (format.fmt.pix.field,
&info.interlace_mode)) {
if (gst_structure_has_field (s, "interlace-mode")) {
if (format.fmt.pix.field != field)
goto invalid_field;
}
} else {
/* The driver (or libv4l2) is miss-behaving, just ignore interlace-mode from
* the TRY_FMT */
disable_interlacing = TRUE;
if (gst_structure_has_field (s, "interlace-mode"))
gst_structure_remove_field (s, "interlace-mode");
}
if (gst_v4l2_object_get_colorspace (v4l2object, &format, &info.colorimetry)) {
if (gst_structure_has_field (s, "colorimetry")) {
if (!gst_v4l2_video_colorimetry_matches (&info.colorimetry, caps))
goto invalid_colorimetry;
}
} else {
/* The driver (or libv4l2) is miss-behaving, just ignore colorimetry from
* the TRY_FMT */
disable_colorimetry = TRUE;
if (gst_structure_has_field (s, "colorimetry"))
gst_structure_remove_field (s, "colorimetry");
}
/* In case we have skipped the try_fmt probes, we'll need to set the
* interlace-mode and colorimetry back into the caps. */
if (v4l2object->skip_try_fmt_probes) {
if (!disable_interlacing && !gst_structure_has_field (s, "interlace-mode")) {
gst_structure_set (s, "interlace-mode", G_TYPE_STRING,
gst_video_interlace_mode_to_string (info.interlace_mode), NULL);
}
if (!disable_colorimetry && !gst_structure_has_field (s, "colorimetry")) {
gchar *str = gst_video_colorimetry_to_string (&info.colorimetry);
gst_structure_set (s, "colorimetry", G_TYPE_STRING, str, NULL);
g_free (str);
}
}
if (try_only) /* good enough for trying only */
return TRUE;
if (GST_VIDEO_INFO_HAS_ALPHA (&info)) {
struct v4l2_control ctl = { 0, };
ctl.id = V4L2_CID_ALPHA_COMPONENT;
ctl.value = 0xff;
if (v4l2object->ioctl (fd, VIDIOC_S_CTRL, &ctl) < 0)
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"Failed to set alpha component value");
}
/* Is there a reason we require the caller to always specify a framerate? */
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired framerate: %u/%u", fps_n,
fps_d);
memset (&streamparm, 0x00, sizeof (struct v4l2_streamparm));
streamparm.type = v4l2object->type;
if (v4l2object->ioctl (fd, VIDIOC_G_PARM, &streamparm) < 0)
goto get_parm_failed;
if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE
|| v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
GST_VIDEO_INFO_FPS_N (&info) =
streamparm.parm.capture.timeperframe.denominator;
GST_VIDEO_INFO_FPS_D (&info) =
streamparm.parm.capture.timeperframe.numerator;
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got capture framerate: %u/%u",
streamparm.parm.capture.timeperframe.denominator,
streamparm.parm.capture.timeperframe.numerator);
/* We used to skip frame rate setup if the camera was already setup
* with the requested frame rate. This breaks some cameras though,
* causing them to not output data (several models of Thinkpad cameras
* have this problem at least).
* So, don't skip. */
GST_LOG_OBJECT (v4l2object->dbg_obj, "Setting capture framerate to %u/%u",
fps_n, fps_d);
/* We want to change the frame rate, so check whether we can. Some cheap USB
* cameras don't have the capability */
if ((streamparm.parm.capture.capability & V4L2_CAP_TIMEPERFRAME) == 0) {
GST_DEBUG_OBJECT (v4l2object->dbg_obj,
"Not setting capture framerate (not supported)");
goto done;
}
/* Note: V4L2 wants the frame interval, we have the frame rate */
streamparm.parm.capture.timeperframe.numerator = fps_d;
streamparm.parm.capture.timeperframe.denominator = fps_n;
/* some cheap USB cam's won't accept any change */
if (v4l2object->ioctl (fd, VIDIOC_S_PARM, &streamparm) < 0)
goto set_parm_failed;
if (streamparm.parm.capture.timeperframe.numerator > 0 &&
streamparm.parm.capture.timeperframe.denominator > 0) {
/* get new values */
fps_d = streamparm.parm.capture.timeperframe.numerator;
fps_n = streamparm.parm.capture.timeperframe.denominator;
GST_INFO_OBJECT (v4l2object->dbg_obj, "Set capture framerate to %u/%u",
fps_n, fps_d);
} else {
/* fix v4l2 capture driver to provide framerate values */
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"Reuse caps framerate %u/%u - fix v4l2 capture driver", fps_n, fps_d);
}
GST_VIDEO_INFO_FPS_N (&info) = fps_n;
GST_VIDEO_INFO_FPS_D (&info) = fps_d;
} else if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT
|| v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
GST_VIDEO_INFO_FPS_N (&info) =
streamparm.parm.output.timeperframe.denominator;
GST_VIDEO_INFO_FPS_D (&info) =
streamparm.parm.output.timeperframe.numerator;
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got output framerate: %u/%u",
streamparm.parm.output.timeperframe.denominator,
streamparm.parm.output.timeperframe.numerator);
GST_LOG_OBJECT (v4l2object->dbg_obj, "Setting output framerate to %u/%u",
fps_n, fps_d);
if ((streamparm.parm.output.capability & V4L2_CAP_TIMEPERFRAME) == 0) {
GST_DEBUG_OBJECT (v4l2object->dbg_obj,
"Not setting output framerate (not supported)");
goto done;
}
/* Note: V4L2 wants the frame interval, we have the frame rate */
streamparm.parm.output.timeperframe.numerator = fps_d;
streamparm.parm.output.timeperframe.denominator = fps_n;
if (v4l2object->ioctl (fd, VIDIOC_S_PARM, &streamparm) < 0)
goto set_parm_failed;
if (streamparm.parm.output.timeperframe.numerator > 0 &&
streamparm.parm.output.timeperframe.denominator > 0) {
/* get new values */
fps_d = streamparm.parm.output.timeperframe.numerator;
fps_n = streamparm.parm.output.timeperframe.denominator;
GST_INFO_OBJECT (v4l2object->dbg_obj, "Set output framerate to %u/%u",
fps_n, fps_d);
} else {
/* fix v4l2 output driver to provide framerate values */
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"Reuse caps framerate %u/%u - fix v4l2 output driver", fps_n, fps_d);
}
GST_VIDEO_INFO_FPS_N (&info) = fps_n;
GST_VIDEO_INFO_FPS_D (&info) = fps_d;
}
done:
/* add boolean return, so we can fail on drivers bugs */
gst_v4l2_object_save_format (v4l2object, fmtdesc, &format, &info, &align);
/* now configure the pool */
if (!gst_v4l2_object_setup_pool (v4l2object, caps))
goto pool_failed;
return TRUE;
/* ERRORS */
invalid_caps:
{
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "can't parse caps %" GST_PTR_FORMAT,
caps);
GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
(_("Invalid caps")), ("Can't parse caps %" GST_PTR_FORMAT, caps));
return FALSE;
}
try_fmt_failed:
{
if (errno == EINVAL) {
GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
(_("Device '%s' has no supported format"), v4l2object->videodev),
("Call to TRY_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
GST_FOURCC_ARGS (pixelformat), width, height,
g_strerror (errno)));
} else {
GST_V4L2_ERROR (error, RESOURCE, FAILED,
(_("Device '%s' failed during initialization"),
v4l2object->videodev),
("Call to TRY_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
GST_FOURCC_ARGS (pixelformat), width, height,
g_strerror (errno)));
}
return FALSE;
}
set_fmt_failed:
{
if (errno == EBUSY) {
GST_V4L2_ERROR (error, RESOURCE, BUSY,
(_("Device '%s' is busy"), v4l2object->videodev),
("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
GST_FOURCC_ARGS (pixelformat), width, height,
g_strerror (errno)));
} else if (errno == EINVAL) {
GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
(_("Device '%s' has no supported format"), v4l2object->videodev),
("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
GST_FOURCC_ARGS (pixelformat), width, height,
g_strerror (errno)));
} else {
GST_V4L2_ERROR (error, RESOURCE, FAILED,
(_("Device '%s' failed during initialization"),
v4l2object->videodev),
("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
GST_FOURCC_ARGS (pixelformat), width, height,
g_strerror (errno)));
}
return FALSE;
}
invalid_dimensions:
{
GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
(_("Device '%s' cannot capture at %dx%d"),
v4l2object->videodev, width, height),
("Tried to capture at %dx%d, but device returned size %dx%d",
width, height, format.fmt.pix.width, format.fmt.pix.height));
return FALSE;
}
invalid_pixelformat:
{
GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
(_("Device '%s' cannot capture in the specified format"),
v4l2object->videodev),
("Tried to capture in %" GST_FOURCC_FORMAT
", but device returned format" " %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (pixelformat),
GST_FOURCC_ARGS (format.fmt.pix.pixelformat)));
return FALSE;
}
invalid_planes:
{
GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
(_("Device '%s' does support non-contiguous planes"),
v4l2object->videodev),
("Device wants %d planes", format.fmt.pix_mp.num_planes));
return FALSE;
}
invalid_field:
{
enum v4l2_field wanted_field;
if (is_mplane)
wanted_field = format.fmt.pix_mp.field;
else
wanted_field = format.fmt.pix.field;
GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
(_("Device '%s' does not support %s interlacing"),
v4l2object->videodev,
field == V4L2_FIELD_NONE ? "progressive" : "interleaved"),
("Device wants %s interlacing",
wanted_field == V4L2_FIELD_NONE ? "progressive" : "interleaved"));
return FALSE;
}
invalid_colorimetry:
{
gchar *wanted_colorimetry;
wanted_colorimetry = gst_video_colorimetry_to_string (&info.colorimetry);
GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
(_("Device '%s' does not support %s colorimetry"),
v4l2object->videodev, gst_structure_get_string (s, "colorimetry")),
("Device wants %s colorimetry", wanted_colorimetry));
g_free (wanted_colorimetry);
return FALSE;
}
get_parm_failed:
{
/* it's possible that this call is not supported */
if (errno != EINVAL && errno != ENOTTY) {
GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
(_("Could not get parameters on device '%s'"),
v4l2object->videodev), GST_ERROR_SYSTEM);
}
goto done;
}
set_parm_failed:
{
GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
(_("Video device did not accept new frame rate setting.")),
GST_ERROR_SYSTEM);
goto done;
}
pool_failed:
{
/* setup_pool already send the error */
return FALSE;
}
}
gboolean
gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps,
GstV4l2Error * error)
{
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Setting format to %" GST_PTR_FORMAT,
caps);
return gst_v4l2_object_set_format_full (v4l2object, caps, FALSE, error);
}
gboolean
gst_v4l2_object_try_format (GstV4l2Object * v4l2object, GstCaps * caps,
GstV4l2Error * error)
{
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Trying format %" GST_PTR_FORMAT,
caps);
return gst_v4l2_object_set_format_full (v4l2object, caps, TRUE, error);
}
/**
* gst_v4l2_object_acquire_format:
* @v4l2object: the object
* @info: a GstVideoInfo to be filled
*
* Acquire the driver chosen format. This is useful in decoder or encoder elements where
* the output format is chosen by the HW.
*
* Returns: %TRUE on success, %FALSE on failure.
*/
gboolean
gst_v4l2_object_acquire_format (GstV4l2Object * v4l2object, GstVideoInfo * info)
{
struct v4l2_fmtdesc *fmtdesc;
struct v4l2_format fmt;
struct v4l2_crop crop;
struct v4l2_selection sel;
struct v4l2_rect *r = NULL;
GstVideoFormat format;
guint width, height;
GstVideoAlignment align;
GstVideoInterlaceMode interlace_mode;
gst_video_info_init (info);
gst_video_alignment_reset (&align);
memset (&fmt, 0x00, sizeof (struct v4l2_format));
fmt.type = v4l2object->type;
if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_FMT, &fmt) < 0)
goto get_fmt_failed;
fmtdesc = gst_v4l2_object_get_format_from_fourcc (v4l2object,
fmt.fmt.pix.pixelformat);
if (fmtdesc == NULL)
goto unsupported_format;
/* No need to care about mplane, the four first params are the same */
format = gst_v4l2_object_v4l2fourcc_to_video_format (fmt.fmt.pix.pixelformat);
/* fails if we do no translate the fmt.pix.pixelformat to GstVideoFormat */
if (format == GST_VIDEO_FORMAT_UNKNOWN)
goto unsupported_format;
if (fmt.fmt.pix.width == 0 || fmt.fmt.pix.height == 0)
goto invalid_dimensions;
width = fmt.fmt.pix.width;
height = fmt.fmt.pix.height;
/* Use the default compose rectangle */
memset (&sel, 0, sizeof (struct v4l2_selection));
sel.type = v4l2object->type;
sel.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_SELECTION, &sel) >= 0) {
r = &sel.r;
} else {
/* For ancient kernels, fall back to G_CROP */
memset (&crop, 0, sizeof (struct v4l2_crop));
crop.type = v4l2object->type;
if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CROP, &crop) >= 0)
r = &crop.c;
}
if (r) {
align.padding_left = r->left;
align.padding_top = r->top;
align.padding_right = width - r->width - r->left;
align.padding_bottom = height - r->height - r->top;
width = r->width;
height = r->height;
}
switch (fmt.fmt.pix.field) {
case V4L2_FIELD_ANY:
case V4L2_FIELD_NONE:
interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
break;
case V4L2_FIELD_INTERLACED:
case V4L2_FIELD_INTERLACED_TB:
case V4L2_FIELD_INTERLACED_BT:
interlace_mode = GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
break;
case V4L2_FIELD_ALTERNATE:
interlace_mode = GST_VIDEO_INTERLACE_MODE_ALTERNATE;
break;
default:
goto unsupported_field;
}
gst_video_info_set_interlaced_format (info, format, interlace_mode, width,
height);
gst_v4l2_object_get_colorspace (v4l2object, &fmt, &info->colorimetry);
gst_v4l2_object_get_streamparm (v4l2object, info);
if ((info->fps_n == 0 && v4l2object->info.fps_d != 0)
&& (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE
|| v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)) {
info->fps_d = v4l2object->info.fps_d;
info->fps_n = v4l2object->info.fps_n;
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Set capture fps to %d/%d",
info->fps_n, info->fps_d);
}
gst_v4l2_object_save_format (v4l2object, fmtdesc, &fmt, info, &align);
/* Shall we setup the pool ? */
return TRUE;
get_fmt_failed:
{
GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
(_("Video device did not provide output format.")), GST_ERROR_SYSTEM);
return FALSE;
}
invalid_dimensions:
{
GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
(_("Video device returned invalid dimensions.")),
("Expected non 0 dimensions, got %dx%d", fmt.fmt.pix.width,
fmt.fmt.pix.height));
return FALSE;
}
unsupported_field:
{
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
(_("Video device uses an unsupported interlacing method.")),
("V4L2 field type %d not supported", fmt.fmt.pix.field));
return FALSE;
}
unsupported_format:
{
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
(_("Video device uses an unsupported pixel format.")),
("V4L2 format %" GST_FOURCC_FORMAT " not supported",
GST_FOURCC_ARGS (fmt.fmt.pix.pixelformat)));
return FALSE;
}
}
gboolean
gst_v4l2_object_set_crop (GstV4l2Object * obj)
{
struct v4l2_selection sel = { 0 };
struct v4l2_crop crop = { 0 };
sel.type = obj->type;
sel.target = V4L2_SEL_TGT_CROP;
sel.flags = 0;
sel.r.left = obj->align.padding_left;
sel.r.top = obj->align.padding_top;
sel.r.width = obj->info.width;
sel.r.height = GST_VIDEO_INFO_FIELD_HEIGHT (&obj->info);
crop.type = obj->type;
crop.c = sel.r;
if (obj->align.padding_left + obj->align.padding_top +
obj->align.padding_right + obj->align.padding_bottom == 0) {
GST_DEBUG_OBJECT (obj->dbg_obj, "no cropping needed");
return TRUE;
}
GST_DEBUG_OBJECT (obj->dbg_obj,
"Desired cropping left %u, top %u, size %ux%u", crop.c.left, crop.c.top,
crop.c.width, crop.c.height);
if (obj->ioctl (obj->video_fd, VIDIOC_S_SELECTION, &sel) < 0) {
if (errno != ENOTTY) {
GST_WARNING_OBJECT (obj->dbg_obj,
"Failed to set crop rectangle with VIDIOC_S_SELECTION: %s",
g_strerror (errno));
return FALSE;
} else {
if (obj->ioctl (obj->video_fd, VIDIOC_S_CROP, &crop) < 0) {
GST_WARNING_OBJECT (obj->dbg_obj, "VIDIOC_S_CROP failed");
return FALSE;
}
if (obj->ioctl (obj->video_fd, VIDIOC_G_CROP, &crop) < 0) {
GST_WARNING_OBJECT (obj->dbg_obj, "VIDIOC_G_CROP failed");
return FALSE;
}
sel.r = crop.c;
}
}
GST_DEBUG_OBJECT (obj->dbg_obj,
"Got cropping left %u, top %u, size %ux%u", crop.c.left, crop.c.top,
crop.c.width, crop.c.height);
return TRUE;
}
gboolean
gst_v4l2_object_caps_equal (GstV4l2Object * v4l2object, GstCaps * caps)
{
GstStructure *config;
GstCaps *oldcaps;
gboolean ret;
if (!v4l2object->pool)
return FALSE;
config = gst_buffer_pool_get_config (v4l2object->pool);
gst_buffer_pool_config_get_params (config, &oldcaps, NULL, NULL, NULL);
ret = oldcaps && gst_caps_is_equal (caps, oldcaps);
gst_structure_free (config);
return ret;
}
gboolean
gst_v4l2_object_caps_is_subset (GstV4l2Object * v4l2object, GstCaps * caps)
{
GstStructure *config;
GstCaps *oldcaps;
gboolean ret;
if (!v4l2object->pool)
return FALSE;
config = gst_buffer_pool_get_config (v4l2object->pool);
gst_buffer_pool_config_get_params (config, &oldcaps, NULL, NULL, NULL);
ret = oldcaps && gst_caps_is_subset (oldcaps, caps);
gst_structure_free (config);
return ret;
}
GstCaps *
gst_v4l2_object_get_current_caps (GstV4l2Object * v4l2object)
{
GstStructure *config;
GstCaps *oldcaps;
if (!v4l2object->pool)
return NULL;
config = gst_buffer_pool_get_config (v4l2object->pool);
gst_buffer_pool_config_get_params (config, &oldcaps, NULL, NULL, NULL);
if (oldcaps)
gst_caps_ref (oldcaps);
gst_structure_free (config);
return oldcaps;
}
gboolean
gst_v4l2_object_unlock (GstV4l2Object * v4l2object)
{
gboolean ret = TRUE;
GST_LOG_OBJECT (v4l2object->dbg_obj, "start flushing");
if (v4l2object->pool && gst_buffer_pool_is_active (v4l2object->pool))
gst_buffer_pool_set_flushing (v4l2object->pool, TRUE);
return ret;
}
gboolean
gst_v4l2_object_unlock_stop (GstV4l2Object * v4l2object)
{
gboolean ret = TRUE;
GST_LOG_OBJECT (v4l2object->dbg_obj, "stop flushing");
if (v4l2object->pool && gst_buffer_pool_is_active (v4l2object->pool))
gst_buffer_pool_set_flushing (v4l2object->pool, FALSE);
return ret;
}
gboolean
gst_v4l2_object_stop (GstV4l2Object * v4l2object)
{
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "stopping");
if (!GST_V4L2_IS_OPEN (v4l2object))
goto done;
if (!GST_V4L2_IS_ACTIVE (v4l2object))
goto done;
if (v4l2object->pool) {
if (!gst_v4l2_buffer_pool_orphan (&v4l2object->pool)) {
GST_DEBUG_OBJECT (v4l2object->dbg_obj, "deactivating pool");
gst_buffer_pool_set_active (v4l2object->pool, FALSE);
gst_object_unref (v4l2object->pool);
}
v4l2object->pool = NULL;
}
GST_V4L2_SET_INACTIVE (v4l2object);
done:
return TRUE;
}
GstCaps *
gst_v4l2_object_probe_caps (GstV4l2Object * v4l2object, GstCaps * filter)
{
GstCaps *ret;
GSList *walk;
GSList *formats;
formats = gst_v4l2_object_get_format_list (v4l2object);
ret = gst_caps_new_empty ();
if (v4l2object->keep_aspect && !v4l2object->par) {
struct v4l2_cropcap cropcap;
memset (&cropcap, 0, sizeof (cropcap));
cropcap.type = v4l2object->type;
if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_CROPCAP, &cropcap) < 0) {
if (errno != ENOTTY)
GST_WARNING_OBJECT (v4l2object->dbg_obj,
"Failed to probe pixel aspect ratio with VIDIOC_CROPCAP: %s",
g_strerror (errno));
} else if (cropcap.pixelaspect.numerator && cropcap.pixelaspect.denominator) {
v4l2object->par = g_new0 (GValue, 1);
g_value_init (v4l2object->par, GST_TYPE_FRACTION);
gst_value_set_fraction (v4l2object->par, cropcap.pixelaspect.numerator,
cropcap.pixelaspect.denominator);
}
}
for (walk = formats; walk; walk = walk->next) {
struct v4l2_fmtdesc *format;
GstStructure *template;
GstCaps *tmp;
format = (struct v4l2_fmtdesc *) walk->data;
template = gst_v4l2_object_v4l2fourcc_to_bare_struct (format->pixelformat);
if (!template) {
GST_DEBUG_OBJECT (v4l2object->dbg_obj,
"unknown format %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (format->pixelformat));
continue;
}
/* If we have a filter, check if we need to probe this format or not */
if (filter) {
GstCaps *format_caps = gst_caps_new_empty ();
gst_caps_append_structure (format_caps, gst_structure_copy (template));
if (!gst_caps_can_intersect (format_caps, filter)) {
gst_caps_unref (format_caps);
gst_structure_free (template);
continue;
}
gst_caps_unref (format_caps);
}
tmp = gst_v4l2_object_probe_caps_for_format (v4l2object,
format->pixelformat, template);
if (tmp) {
gst_caps_append (ret, tmp);
/* Add a variant of the caps with the Interlaced feature so we can negotiate it if needed */
add_alternate_variant (v4l2object, ret, gst_caps_get_structure (ret,
gst_caps_get_size (ret) - 1));
}
gst_structure_free (template);
}
if (filter) {
GstCaps *tmp;
tmp = ret;
ret = gst_caps_intersect_full (filter, ret, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (tmp);
}
GST_INFO_OBJECT (v4l2object->dbg_obj, "probed caps: %" GST_PTR_FORMAT, ret);
return ret;
}
GstCaps *
gst_v4l2_object_get_caps (GstV4l2Object * v4l2object, GstCaps * filter)
{
GstCaps *ret;
if (v4l2object->probed_caps == NULL)
v4l2object->probed_caps = gst_v4l2_object_probe_caps (v4l2object, NULL);
if (filter) {
ret = gst_caps_intersect_full (filter, v4l2object->probed_caps,
GST_CAPS_INTERSECT_FIRST);
} else {
ret = gst_caps_ref (v4l2object->probed_caps);
}
return ret;
}
static gboolean
gst_v4l2_object_match_buffer_layout (GstV4l2Object * obj, guint n_planes,
gsize offset[GST_VIDEO_MAX_PLANES], gint stride[GST_VIDEO_MAX_PLANES],
gsize buffer_size, guint padded_height)
{
guint p;
gboolean need_fmt_update = FALSE;
if (n_planes != GST_VIDEO_INFO_N_PLANES (&obj->info)) {
GST_WARNING_OBJECT (obj->dbg_obj,
"Cannot match buffers with different number planes");
return FALSE;
}
for (p = 0; p < n_planes; p++) {
if (stride[p] < obj->info.stride[p]) {
GST_DEBUG_OBJECT (obj->dbg_obj,
"Not matching as remote stride %i is smaller than %i on plane %u",
stride[p], obj->info.stride[p], p);
return FALSE;
} else if (stride[p] > obj->info.stride[p]) {
GST_LOG_OBJECT (obj->dbg_obj,
"remote stride %i is higher than %i on plane %u",
stride[p], obj->info.stride[p], p);
need_fmt_update = TRUE;
}
if (offset[p] < obj->info.offset[p]) {
GST_DEBUG_OBJECT (obj->dbg_obj,
"Not matching as offset %" G_GSIZE_FORMAT
" is smaller than %" G_GSIZE_FORMAT " on plane %u",
offset[p], obj->info.offset[p], p);
return FALSE;
} else if (offset[p] > obj->info.offset[p]) {
GST_LOG_OBJECT (obj->dbg_obj,
"Remote offset %" G_GSIZE_FORMAT
" is higher than %" G_GSIZE_FORMAT " on plane %u",
offset[p], obj->info.offset[p], p);
need_fmt_update = TRUE;
}
if (padded_height) {
guint fmt_height;
if (V4L2_TYPE_IS_MULTIPLANAR (obj->type))
fmt_height = obj->format.fmt.pix_mp.height;
else
fmt_height = obj->format.fmt.pix.height;
if (padded_height > fmt_height)
need_fmt_update = TRUE;
}
}
if (need_fmt_update) {
struct v4l2_format format;
gint wanted_stride[GST_VIDEO_MAX_PLANES] = { 0, };
format = obj->format;
if (padded_height) {
GST_DEBUG_OBJECT (obj->dbg_obj, "Padded height %u", padded_height);
obj->align.padding_bottom =
padded_height - GST_VIDEO_INFO_FIELD_HEIGHT (&obj->info);
} else {
GST_WARNING_OBJECT (obj->dbg_obj,
"Failed to compute padded height; keep the default one");
padded_height = format.fmt.pix_mp.height;
}
/* update the current format with the stride we want to import from */
if (V4L2_TYPE_IS_MULTIPLANAR (obj->type)) {
guint i;
GST_DEBUG_OBJECT (obj->dbg_obj, "Wanted strides:");
for (i = 0; i < obj->n_v4l2_planes; i++) {
gint plane_stride = stride[i];
if (GST_VIDEO_FORMAT_INFO_IS_TILED (obj->info.finfo))
plane_stride = GST_VIDEO_TILE_X_TILES (plane_stride) <<
GST_VIDEO_FORMAT_INFO_TILE_WS (obj->info.finfo);
format.fmt.pix_mp.plane_fmt[i].bytesperline = plane_stride;
format.fmt.pix_mp.height = padded_height;
wanted_stride[i] = plane_stride;
GST_DEBUG_OBJECT (obj->dbg_obj, " [%u] %i", i, wanted_stride[i]);
}
} else {
gint plane_stride = stride[0];
GST_DEBUG_OBJECT (obj->dbg_obj, "Wanted stride: %i", plane_stride);
if (GST_VIDEO_FORMAT_INFO_IS_TILED (obj->info.finfo))
plane_stride = GST_VIDEO_TILE_X_TILES (plane_stride) <<
GST_VIDEO_FORMAT_INFO_TILE_WS (obj->info.finfo);
format.fmt.pix.bytesperline = plane_stride;
format.fmt.pix.height = padded_height;
wanted_stride[0] = plane_stride;
}
if (obj->ioctl (obj->video_fd, VIDIOC_S_FMT, &format) < 0) {
GST_WARNING_OBJECT (obj->dbg_obj,
"Something went wrong trying to update current format: %s",
g_strerror (errno));
return FALSE;
}
gst_v4l2_object_save_format (obj, obj->fmtdesc, &format, &obj->info,
&obj->align);
if (V4L2_TYPE_IS_MULTIPLANAR (obj->type)) {
guint i;
for (i = 0; i < obj->n_v4l2_planes; i++) {
if (format.fmt.pix_mp.plane_fmt[i].bytesperline != wanted_stride[i]) {
GST_DEBUG_OBJECT (obj->dbg_obj,
"[%i] Driver did not accept the new stride (wants %i, got %i)",
i, wanted_stride[i], format.fmt.pix_mp.plane_fmt[i].bytesperline);
return FALSE;
}
}
if (format.fmt.pix_mp.height != padded_height) {
GST_DEBUG_OBJECT (obj->dbg_obj,
"Driver did not accept the padded height (wants %i, got %i)",
padded_height, format.fmt.pix_mp.height);
}
} else {
if (format.fmt.pix.bytesperline != wanted_stride[0]) {
GST_DEBUG_OBJECT (obj->dbg_obj,
"Driver did not accept the new stride (wants %i, got %i)",
wanted_stride[0], format.fmt.pix.bytesperline);
return FALSE;
}
if (format.fmt.pix.height != padded_height) {
GST_DEBUG_OBJECT (obj->dbg_obj,
"Driver did not accept the padded height (wants %i, got %i)",
padded_height, format.fmt.pix.height);
}
}
}
if (obj->align.padding_bottom) {
/* Crop because of vertical padding */
GST_DEBUG_OBJECT (obj->dbg_obj, "crop because of bottom padding of %d",
obj->align.padding_bottom);
gst_v4l2_object_set_crop (obj);
}
return TRUE;
}
static gboolean
validate_video_meta_struct (GstV4l2Object * obj, const GstStructure * s)
{
guint i;
for (i = 0; i < gst_structure_n_fields (s); i++) {
const gchar *name = gst_structure_nth_field_name (s, i);
if (!g_str_equal (name, "padding-top")
&& !g_str_equal (name, "padding-bottom")
&& !g_str_equal (name, "padding-left")
&& !g_str_equal (name, "padding-right")) {
GST_WARNING_OBJECT (obj->dbg_obj, "Unknown video meta field: '%s'", name);
return FALSE;
}
}
return TRUE;
}
static gboolean
gst_v4l2_object_match_buffer_layout_from_struct (GstV4l2Object * obj,
const GstStructure * s, GstCaps * caps, guint buffer_size)
{
GstVideoInfo info;
GstVideoAlignment align;
gsize plane_size[GST_VIDEO_MAX_PLANES];
if (!validate_video_meta_struct (obj, s))
return FALSE;
if (!gst_video_info_from_caps (&info, caps)) {
GST_WARNING_OBJECT (obj->dbg_obj, "Failed to create video info");
return FALSE;
}
gst_video_alignment_reset (&align);
gst_structure_get_uint (s, "padding-top", &align.padding_top);
gst_structure_get_uint (s, "padding-bottom", &align.padding_bottom);
gst_structure_get_uint (s, "padding-left", &align.padding_left);
gst_structure_get_uint (s, "padding-right", &align.padding_right);
if (align.padding_top || align.padding_bottom || align.padding_left ||
align.padding_right) {
GST_DEBUG_OBJECT (obj->dbg_obj,
"Upstream requested padding (top: %d bottom: %d left: %d right: %d)",
align.padding_top, align.padding_bottom, align.padding_left,
align.padding_right);
}
if (!gst_video_info_align_full (&info, &align, plane_size)) {
GST_WARNING_OBJECT (obj->dbg_obj, "Failed to align video info");
return FALSE;
}
if (GST_VIDEO_INFO_SIZE (&info) != buffer_size) {
GST_WARNING_OBJECT (obj->dbg_obj,
"Requested buffer size (%d) doesn't match video info size (%"
G_GSIZE_FORMAT ")", buffer_size, GST_VIDEO_INFO_SIZE (&info));
return FALSE;
}
GST_DEBUG_OBJECT (obj->dbg_obj,
"try matching buffer layout requested by downstream");
gst_v4l2_object_match_buffer_layout (obj, GST_VIDEO_INFO_N_PLANES (&info),
info.offset, info.stride, buffer_size,
GST_VIDEO_INFO_PLANE_HEIGHT (&info, 0, plane_size));
return TRUE;
}
gboolean
gst_v4l2_object_decide_allocation (GstV4l2Object * obj, GstQuery * query)
{
GstCaps *caps;
GstBufferPool *pool = NULL, *other_pool = NULL;
GstStructure *config;
guint size, min, max, own_min = 0;
gboolean update;
gboolean has_video_meta;
gboolean can_share_own_pool, pushing_from_our_pool = FALSE;
GstAllocator *allocator = NULL;
GstAllocationParams params = { 0 };
guint video_idx;
GST_DEBUG_OBJECT (obj->dbg_obj, "decide allocation");
g_return_val_if_fail (obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE, FALSE);
gst_query_parse_allocation (query, &caps, NULL);
if (obj->pool == NULL) {
if (!gst_v4l2_object_setup_pool (obj, caps))
goto pool_failed;
}
if (gst_query_get_n_allocation_params (query) > 0)
gst_query_parse_nth_allocation_param (query, 0, &allocator, &params);
if (gst_query_get_n_allocation_pools (query) > 0) {
gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
update = TRUE;
} else {
pool = NULL;
min = max = 0;
size = 0;
update = FALSE;
}
GST_DEBUG_OBJECT (obj->dbg_obj, "allocation: size:%u min:%u max:%u pool:%"
GST_PTR_FORMAT, size, min, max, pool);
has_video_meta =
gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE,
&video_idx);
if (has_video_meta) {
const GstStructure *params;
gst_query_parse_nth_allocation_meta (query, video_idx, &params);
if (params)
gst_v4l2_object_match_buffer_layout_from_struct (obj, params, caps, size);
}
can_share_own_pool = (has_video_meta || !obj->need_video_meta);
gst_v4l2_get_driver_min_buffers (obj);
/* We can't share our own pool, if it exceed V4L2 capacity */
if (min + obj->min_buffers + 1 > VIDEO_MAX_FRAME)
can_share_own_pool = FALSE;
/* select a pool */
switch (obj->mode) {
case GST_V4L2_IO_RW:
if (pool) {
/* in READ/WRITE mode, prefer a downstream pool because our own pool
* doesn't help much, we have to write to it as well */
GST_DEBUG_OBJECT (obj->dbg_obj,
"read/write mode: using downstream pool");
/* use the bigest size, when we use our own pool we can't really do any
* other size than what the hardware gives us but for downstream pools
* we can try */
size = MAX (size, obj->info.size);
} else if (can_share_own_pool) {
/* no downstream pool, use our own then */
GST_DEBUG_OBJECT (obj->dbg_obj,
"read/write mode: no downstream pool, using our own");
pool = gst_object_ref (obj->pool);
size = obj->info.size;
pushing_from_our_pool = TRUE;
}
break;
case GST_V4L2_IO_USERPTR:
case GST_V4L2_IO_DMABUF_IMPORT:
/* in importing mode, prefer our own pool, and pass the other pool to
* our own, so it can serve itself */
if (pool == NULL)
goto no_downstream_pool;
gst_v4l2_buffer_pool_set_other_pool (GST_V4L2_BUFFER_POOL (obj->pool),
pool);
other_pool = pool;
gst_object_unref (pool);
pool = gst_object_ref (obj->pool);
size = obj->info.size;
break;
case GST_V4L2_IO_MMAP:
case GST_V4L2_IO_DMABUF:
/* in streaming mode, prefer our own pool */
/* Check if we can use it ... */
if (can_share_own_pool) {
if (pool)
gst_object_unref (pool);
pool = gst_object_ref (obj->pool);
size = obj->info.size;
GST_DEBUG_OBJECT (obj->dbg_obj,
"streaming mode: using our own pool %" GST_PTR_FORMAT, pool);
pushing_from_our_pool = TRUE;
} else if (pool) {
GST_DEBUG_OBJECT (obj->dbg_obj,
"streaming mode: copying to downstream pool %" GST_PTR_FORMAT,
pool);
} else {
GST_DEBUG_OBJECT (obj->dbg_obj,
"streaming mode: no usable pool, copying to generic pool");
size = MAX (size, obj->info.size);
}
break;
case GST_V4L2_IO_AUTO:
default:
GST_WARNING_OBJECT (obj->dbg_obj, "unhandled mode");
break;
}
if (size == 0)
goto no_size;
/* If pushing from our own pool, configure it with queried minimum,
* otherwise use the minimum required */
if (pushing_from_our_pool) {
/* When pushing from our own pool, we need what downstream one, to be able
* to fill the pipeline, the minimum required to decoder according to the
* driver and 2 more, so we don't endup up with everything downstream or
* held by the decoder. We account 2 buffers for v4l2 so when one is being
* pushed downstream the other one can already be queued for the next
* frame. */
own_min = min + obj->min_buffers + 2;
/* If no allocation parameters where provided, allow for a little more
* buffers and enable copy threshold */
if (!update) {
own_min += 2;
gst_v4l2_buffer_pool_copy_at_threshold (GST_V4L2_BUFFER_POOL (pool),
TRUE);
} else {
gst_v4l2_buffer_pool_copy_at_threshold (GST_V4L2_BUFFER_POOL (pool),
FALSE);
}
} else {
/* In this case we'll have to configure two buffer pool. For our buffer
* pool, we'll need what the driver one, and one more, so we can dequeu */
own_min = obj->min_buffers + 1;
own_min = MAX (own_min, GST_V4L2_MIN_BUFFERS (obj));
/* for the downstream pool, we keep what downstream wants, though ensure
* at least a minimum if downstream didn't suggest anything (we are
* expecting the base class to create a default one for the context) */
min = MAX (min, GST_V4L2_MIN_BUFFERS (obj));
/* To import we need the other pool to hold at least own_min */
if (obj->pool == pool)
min += own_min;
}
/* Request a bigger max, if one was suggested but it's too small */
if (max != 0)
max = MAX (min, max);
/* First step, configure our own pool */
config = gst_buffer_pool_get_config (obj->pool);
if (obj->need_video_meta || has_video_meta) {
GST_DEBUG_OBJECT (obj->dbg_obj, "activate Video Meta");
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
}
gst_buffer_pool_config_set_allocator (config, allocator, &params);
gst_buffer_pool_config_set_params (config, caps, size, own_min, 0);
GST_DEBUG_OBJECT (obj->dbg_obj, "setting own pool config to %"
GST_PTR_FORMAT, config);
/* Our pool often need to adjust the value */
if (!gst_buffer_pool_set_config (obj->pool, config)) {
config = gst_buffer_pool_get_config (obj->pool);
GST_DEBUG_OBJECT (obj->dbg_obj, "own pool config changed to %"
GST_PTR_FORMAT, config);
/* our pool will adjust the maximum buffer, which we are fine with */
if (!gst_buffer_pool_set_config (obj->pool, config))
goto config_failed;
}
/* Now configure the other pool if different */
if (obj->pool != pool)
other_pool = pool;
if (other_pool) {
config = gst_buffer_pool_get_config (other_pool);
gst_buffer_pool_config_set_allocator (config, allocator, &params);
gst_buffer_pool_config_set_params (config, caps, size, min, max);
GST_DEBUG_OBJECT (obj->dbg_obj, "setting other pool config to %"
GST_PTR_FORMAT, config);
/* if downstream supports video metadata, add this to the pool config */
if (has_video_meta) {
GST_DEBUG_OBJECT (obj->dbg_obj, "activate Video Meta");
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
}
if (!gst_buffer_pool_set_config (other_pool, config)) {
config = gst_buffer_pool_get_config (other_pool);
if (!gst_buffer_pool_config_validate_params (config, caps, size, min,
max)) {
gst_structure_free (config);
goto config_failed;
}
if (!gst_buffer_pool_set_config (other_pool, config))
goto config_failed;
}
}
if (pool) {
/* For simplicity, simply read back the active configuration, so our base
* class get the right information */
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_get_params (config, NULL, &size, &min, &max);
gst_structure_free (config);
}
if (update)
gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
else
gst_query_add_allocation_pool (query, pool, size, min, max);
if (allocator)
gst_object_unref (allocator);
if (pool)
gst_object_unref (pool);
return TRUE;
pool_failed:
{
/* setup_pool already send the error */
goto cleanup;
}
config_failed:
{
GST_ELEMENT_ERROR (obj->element, RESOURCE, SETTINGS,
(_("Failed to configure internal buffer pool.")), (NULL));
goto cleanup;
}
no_size:
{
GST_ELEMENT_ERROR (obj->element, RESOURCE, SETTINGS,
(_("Video device did not suggest any buffer size.")), (NULL));
goto cleanup;
}
cleanup:
{
if (allocator)
gst_object_unref (allocator);
if (pool)
gst_object_unref (pool);
return FALSE;
}
no_downstream_pool:
{
GST_ELEMENT_ERROR (obj->element, RESOURCE, SETTINGS,
(_("No downstream pool to import from.")),
("When importing DMABUF or USERPTR, we need a pool to import from"));
return FALSE;
}
}
gboolean
gst_v4l2_object_propose_allocation (GstV4l2Object * obj, GstQuery * query)
{
GstBufferPool *pool = NULL;
/* we need at least 2 buffers to operate */
guint size, min, max;
GstCaps *caps;
gboolean need_pool;
/* Set defaults allocation parameters */
size = obj->info.size;
min = GST_V4L2_MIN_BUFFERS (obj);
max = VIDEO_MAX_FRAME;
gst_query_parse_allocation (query, &caps, &need_pool);
if (caps == NULL)
goto no_caps;
switch (obj->mode) {
case GST_V4L2_IO_MMAP:
case GST_V4L2_IO_DMABUF:
if (need_pool && obj->pool) {
if (!gst_buffer_pool_is_active (obj->pool))
pool = gst_object_ref (obj->pool);
}
break;
default:
break;
}
if (pool != NULL) {
GstCaps *pcaps;
GstStructure *config;
/* we had a pool, check caps */
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_get_params (config, &pcaps, NULL, NULL, NULL);
GST_DEBUG_OBJECT (obj->dbg_obj,
"we had a pool with caps %" GST_PTR_FORMAT, pcaps);
if (!gst_caps_is_equal (caps, pcaps)) {
gst_structure_free (config);
gst_object_unref (pool);
goto different_caps;
}
gst_structure_free (config);
}
gst_v4l2_get_driver_min_buffers (obj);
min = MAX (obj->min_buffers, GST_V4L2_MIN_BUFFERS (obj));
gst_query_add_allocation_pool (query, pool, size, min, max);
/* we also support various metadata */
gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
if (pool)
gst_object_unref (pool);
return TRUE;
/* ERRORS */
no_caps:
{
GST_DEBUG_OBJECT (obj->dbg_obj, "no caps specified");
return FALSE;
}
different_caps:
{
/* different caps, we can't use this pool */
GST_DEBUG_OBJECT (obj->dbg_obj, "pool has different caps");
return FALSE;
}
}
gboolean
gst_v4l2_object_try_import (GstV4l2Object * obj, GstBuffer * buffer)
{
GstVideoMeta *vmeta;
guint n_mem = gst_buffer_n_memory (buffer);
/* only import if requested */
switch (obj->mode) {
case GST_V4L2_IO_USERPTR:
case GST_V4L2_IO_DMABUF_IMPORT:
break;
default:
GST_DEBUG_OBJECT (obj->dbg_obj,
"The io-mode does not enable importation");
return FALSE;
}
vmeta = gst_buffer_get_video_meta (buffer);
if (!vmeta && obj->need_video_meta) {
GST_DEBUG_OBJECT (obj->dbg_obj, "Downstream buffer uses standard "
"stride/offset while the driver does not.");
return FALSE;
}
/* we need matching strides/offsets and size */
if (vmeta) {
guint plane_height[GST_VIDEO_MAX_PLANES] = { 0, };
gst_video_meta_get_plane_height (vmeta, plane_height);
if (!gst_v4l2_object_match_buffer_layout (obj, vmeta->n_planes,
vmeta->offset, vmeta->stride, gst_buffer_get_size (buffer),
plane_height[0]))
return FALSE;
}
/* we can always import single memory buffer, but otherwise we need the same
* amount of memory object. */
if (n_mem != 1 && n_mem != obj->n_v4l2_planes) {
GST_DEBUG_OBJECT (obj->dbg_obj, "Can only import %i memory, "
"buffers contains %u memory", obj->n_v4l2_planes, n_mem);
return FALSE;
}
/* For DMABuf importation we need DMABuf of course */
if (obj->mode == GST_V4L2_IO_DMABUF_IMPORT) {
guint i;
for (i = 0; i < n_mem; i++) {
GstMemory *mem = gst_buffer_peek_memory (buffer, i);
if (!gst_is_dmabuf_memory (mem)) {
GST_DEBUG_OBJECT (obj->dbg_obj, "Cannot import non-DMABuf memory.");
return FALSE;
}
}
}
/* for the remaining, only the kernel driver can tell */
return TRUE;
}
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