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6ce195e9d1
There used to be some profile/level support in encoders. This code was moved to GstV4l2Codecs and is now also used for decoders. The caps templates for the H.264, H.265, MPEG4, VP8 and VP9 encoders and decoders should now reflect the profiles and levels advertised by the kernel.
288 lines
8.7 KiB
C
288 lines
8.7 KiB
C
/* GStreamer
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*
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* Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
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* 2006 Edgard Lima <edgard.lima@gmail.com>
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*
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* gstv4l2.c: plugin for v4l2 elements
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifndef _GNU_SOURCE
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# define _GNU_SOURCE /* O_CLOEXEC */
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#endif
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#include "gst/gst-i18n-plugin.h"
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#include <gst/gst.h>
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#include <fcntl.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "ext/videodev2.h"
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#include "v4l2-utils.h"
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#include "gstv4l2object.h"
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#include "gstv4l2src.h"
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#include "gstv4l2sink.h"
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#include "gstv4l2radio.h"
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#include "gstv4l2videodec.h"
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#include "gstv4l2fwhtenc.h"
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#include "gstv4l2h263enc.h"
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#include "gstv4l2h264enc.h"
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#include "gstv4l2h265enc.h"
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#include "gstv4l2jpegenc.h"
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#include "gstv4l2mpeg4enc.h"
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#include "gstv4l2vp8enc.h"
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#include "gstv4l2vp9enc.h"
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#include "gstv4l2deviceprovider.h"
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#include "gstv4l2transform.h"
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/* used in gstv4l2object.c and v4l2_calls.c */
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GST_DEBUG_CATEGORY (v4l2_debug);
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#define GST_CAT_DEFAULT v4l2_debug
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#ifdef GST_V4L2_ENABLE_PROBE
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/* This is a minimalist probe, for speed, we only enumerate formats */
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static GstCaps *
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gst_v4l2_probe_template_caps (const gchar * device, gint video_fd,
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enum v4l2_buf_type type)
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{
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gint n;
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struct v4l2_fmtdesc format;
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GstCaps *caps;
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GST_DEBUG ("Getting %s format enumerations", device);
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caps = gst_caps_new_empty ();
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for (n = 0;; n++) {
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GstStructure *template;
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memset (&format, 0, sizeof (format));
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format.index = n;
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format.type = type;
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if (ioctl (video_fd, VIDIOC_ENUM_FMT, &format) < 0)
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break; /* end of enumeration */
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GST_LOG ("index: %u", format.index);
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GST_LOG ("type: %d", format.type);
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GST_LOG ("flags: %08x", format.flags);
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GST_LOG ("description: '%s'", format.description);
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GST_LOG ("pixelformat: %" GST_FOURCC_FORMAT,
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GST_FOURCC_ARGS (format.pixelformat));
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template = gst_v4l2_object_v4l2fourcc_to_structure (format.pixelformat);
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if (template) {
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GstStructure *alt_t = NULL;
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switch (format.pixelformat) {
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case V4L2_PIX_FMT_RGB32:
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alt_t = gst_structure_copy (template);
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gst_structure_set (alt_t, "format", G_TYPE_STRING, "ARGB", NULL);
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break;
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case V4L2_PIX_FMT_BGR32:
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alt_t = gst_structure_copy (template);
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gst_structure_set (alt_t, "format", G_TYPE_STRING, "BGRA", NULL);
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default:
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break;
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}
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gst_caps_append_structure (caps, template);
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if (alt_t)
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gst_caps_append_structure (caps, alt_t);
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}
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}
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return gst_caps_simplify (caps);
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}
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static gboolean
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gst_v4l2_probe_and_register (GstPlugin * plugin)
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{
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GstV4l2Iterator *it;
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gint video_fd = -1;
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struct v4l2_capability vcap;
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guint32 device_caps;
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GST_DEBUG ("Probing devices");
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it = gst_v4l2_iterator_new ();
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while (gst_v4l2_iterator_next (it)) {
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GstCaps *src_caps, *sink_caps;
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gchar *basename;
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if (video_fd >= 0)
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close (video_fd);
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video_fd = open (it->device_path, O_RDWR | O_CLOEXEC);
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if (video_fd == -1) {
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GST_DEBUG ("Failed to open %s: %s", it->device_path, g_strerror (errno));
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continue;
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}
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memset (&vcap, 0, sizeof (vcap));
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if (ioctl (video_fd, VIDIOC_QUERYCAP, &vcap) < 0) {
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GST_DEBUG ("Failed to get device capabilities: %s", g_strerror (errno));
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continue;
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}
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if (vcap.capabilities & V4L2_CAP_DEVICE_CAPS)
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device_caps = vcap.device_caps;
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else
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device_caps = vcap.capabilities;
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if (!GST_V4L2_IS_M2M (device_caps))
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continue;
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GST_DEBUG ("Probing '%s' located at '%s'",
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it->device_name ? it->device_name : (const gchar *) vcap.driver,
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it->device_path);
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/* get sink supported format (no MPLANE for codec) */
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sink_caps = gst_caps_merge (gst_v4l2_probe_template_caps (it->device_path,
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video_fd, V4L2_BUF_TYPE_VIDEO_OUTPUT),
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gst_v4l2_probe_template_caps (it->device_path, video_fd,
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V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE));
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/* get src supported format */
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src_caps = gst_caps_merge (gst_v4l2_probe_template_caps (it->device_path,
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video_fd, V4L2_BUF_TYPE_VIDEO_CAPTURE),
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gst_v4l2_probe_template_caps (it->device_path, video_fd,
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V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE));
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/* Skip devices without any supported formats */
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if (gst_caps_is_empty (sink_caps) || gst_caps_is_empty (src_caps)) {
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gst_caps_unref (sink_caps);
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gst_caps_unref (src_caps);
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continue;
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}
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basename = g_path_get_basename (it->device_path);
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/* Caps won't be freed if the subclass is not instantiated */
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GST_MINI_OBJECT_FLAG_SET (sink_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
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GST_MINI_OBJECT_FLAG_SET (src_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
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if (gst_v4l2_is_video_dec (sink_caps, src_caps)) {
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gst_v4l2_video_dec_register (plugin, basename, it->device_path,
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video_fd, sink_caps, src_caps);
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} else if (gst_v4l2_is_video_enc (sink_caps, src_caps, NULL)) {
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if (gst_v4l2_is_fwht_enc (sink_caps, src_caps))
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gst_v4l2_fwht_enc_register (plugin, basename, it->device_path,
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sink_caps, src_caps);
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if (gst_v4l2_is_h264_enc (sink_caps, src_caps))
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gst_v4l2_h264_enc_register (plugin, basename, it->device_path,
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video_fd, sink_caps, src_caps);
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if (gst_v4l2_is_h265_enc (sink_caps, src_caps))
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gst_v4l2_h265_enc_register (plugin, basename, it->device_path,
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video_fd, sink_caps, src_caps);
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if (gst_v4l2_is_mpeg4_enc (sink_caps, src_caps))
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gst_v4l2_mpeg4_enc_register (plugin, basename, it->device_path,
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video_fd, sink_caps, src_caps);
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if (gst_v4l2_is_h263_enc (sink_caps, src_caps))
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gst_v4l2_h263_enc_register (plugin, basename, it->device_path,
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sink_caps, src_caps);
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if (gst_v4l2_is_jpeg_enc (sink_caps, src_caps))
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gst_v4l2_jpeg_enc_register (plugin, basename, it->device_path,
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sink_caps, src_caps);
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if (gst_v4l2_is_vp8_enc (sink_caps, src_caps))
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gst_v4l2_vp8_enc_register (plugin, basename, it->device_path,
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video_fd, sink_caps, src_caps);
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if (gst_v4l2_is_vp9_enc (sink_caps, src_caps))
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gst_v4l2_vp9_enc_register (plugin, basename, it->device_path,
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video_fd, sink_caps, src_caps);
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} else if (gst_v4l2_is_transform (sink_caps, src_caps)) {
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gst_v4l2_transform_register (plugin, basename, it->device_path,
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sink_caps, src_caps);
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}
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/* else if ( ... etc. */
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gst_caps_unref (sink_caps);
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gst_caps_unref (src_caps);
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g_free (basename);
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}
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if (video_fd >= 0)
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close (video_fd);
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gst_v4l2_iterator_free (it);
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return TRUE;
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}
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#endif
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static gboolean
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plugin_init (GstPlugin * plugin)
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{
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const gchar *paths[] = { "/dev", "/dev/v4l2", NULL };
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const gchar *names[] = { "video", NULL };
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GST_DEBUG_CATEGORY_INIT (v4l2_debug, "v4l2", 0, "V4L2 API calls");
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/* Add some depedency, so the dynamic features get updated upon changes in
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* /dev/video* */
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gst_plugin_add_dependency (plugin,
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NULL, paths, names, GST_PLUGIN_DEPENDENCY_FLAG_FILE_NAME_IS_PREFIX);
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if (!gst_element_register (plugin, "v4l2src", GST_RANK_PRIMARY,
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GST_TYPE_V4L2SRC) ||
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!gst_element_register (plugin, "v4l2sink", GST_RANK_NONE,
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GST_TYPE_V4L2SINK) ||
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!gst_element_register (plugin, "v4l2radio", GST_RANK_NONE,
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GST_TYPE_V4L2RADIO) ||
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!gst_device_provider_register (plugin, "v4l2deviceprovider",
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GST_RANK_PRIMARY, GST_TYPE_V4L2_DEVICE_PROVIDER)
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/* etc. */
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#ifdef GST_V4L2_ENABLE_PROBE
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|| !gst_v4l2_probe_and_register (plugin)
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#endif
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)
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return FALSE;
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#ifdef ENABLE_NLS
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bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
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bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
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#endif /* ENABLE_NLS */
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return TRUE;
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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video4linux2,
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"elements for Video 4 Linux",
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plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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