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16e5b32bc1
The V4L2 elements already set the delta unit buffer flag when dequeueing the buffer, but gst_video_encoder_finish_frame overwrites it from the passed codec frame's sync point flag. Set the flag correctly.
1204 lines
34 KiB
C
1204 lines
34 KiB
C
/*
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* Copyright (C) 2014-2017 SUMOMO Computer Association
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* Authors Ayaka <ayaka@soulik.info>
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* Copyright (C) 2017 Collabora Ltd.
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* Author: Nicolas Dufresne <nicolas.dufresne@collabora.com>
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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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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <unistd.h>
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#include <string.h>
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#include "gstv4l2object.h"
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#include "gstv4l2videoenc.h"
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#include <string.h>
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#include <gst/gst-i18n-plugin.h>
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GST_DEBUG_CATEGORY_STATIC (gst_v4l2_video_enc_debug);
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#define GST_CAT_DEFAULT gst_v4l2_video_enc_debug
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typedef struct
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{
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gchar *device;
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GstCaps *sink_caps;
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GstCaps *src_caps;
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} GstV4l2VideoEncCData;
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enum
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{
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PROP_0,
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V4L2_STD_OBJECT_PROPS,
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};
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#define gst_v4l2_video_enc_parent_class parent_class
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G_DEFINE_ABSTRACT_TYPE (GstV4l2VideoEnc, gst_v4l2_video_enc,
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GST_TYPE_VIDEO_ENCODER);
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static void
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gst_v4l2_video_enc_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec)
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{
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GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (object);
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switch (prop_id) {
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case PROP_CAPTURE_IO_MODE:
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if (!gst_v4l2_object_set_property_helper (self->v4l2capture,
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prop_id, value, pspec)) {
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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break;
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/* By default, only set on output */
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default:
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if (!gst_v4l2_object_set_property_helper (self->v4l2output,
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prop_id, value, pspec)) {
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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break;
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}
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}
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static void
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gst_v4l2_video_enc_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec)
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{
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GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (object);
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switch (prop_id) {
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case PROP_CAPTURE_IO_MODE:
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if (!gst_v4l2_object_get_property_helper (self->v4l2capture,
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prop_id, value, pspec)) {
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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break;
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/* By default read from output */
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default:
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if (!gst_v4l2_object_get_property_helper (self->v4l2output,
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prop_id, value, pspec)) {
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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break;
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}
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}
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static gboolean
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gst_v4l2_video_enc_open (GstVideoEncoder * encoder)
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{
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GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
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GstCaps *codec_caps;
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GST_DEBUG_OBJECT (self, "Opening");
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if (!gst_v4l2_object_open (self->v4l2output))
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goto failure;
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if (!gst_v4l2_object_open_shared (self->v4l2capture, self->v4l2output))
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goto failure;
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self->probed_sinkcaps = gst_v4l2_object_probe_caps (self->v4l2output,
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gst_v4l2_object_get_raw_caps ());
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if (gst_caps_is_empty (self->probed_sinkcaps))
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goto no_raw_format;
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codec_caps = gst_pad_get_pad_template_caps (encoder->srcpad);
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self->probed_srccaps = gst_v4l2_object_probe_caps (self->v4l2capture,
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codec_caps);
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gst_caps_unref (codec_caps);
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if (gst_caps_is_empty (self->probed_srccaps))
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goto no_encoded_format;
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return TRUE;
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no_encoded_format:
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GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
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(_("Encoder on device %s has no supported output format"),
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self->v4l2output->videodev), (NULL));
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goto failure;
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no_raw_format:
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GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
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(_("Encoder on device %s has no supported input format"),
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self->v4l2output->videodev), (NULL));
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goto failure;
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failure:
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if (GST_V4L2_IS_OPEN (self->v4l2output))
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gst_v4l2_object_close (self->v4l2output);
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if (GST_V4L2_IS_OPEN (self->v4l2capture))
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gst_v4l2_object_close (self->v4l2capture);
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gst_caps_replace (&self->probed_srccaps, NULL);
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gst_caps_replace (&self->probed_sinkcaps, NULL);
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return FALSE;
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}
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static gboolean
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gst_v4l2_video_enc_close (GstVideoEncoder * encoder)
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{
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GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
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GST_DEBUG_OBJECT (self, "Closing");
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gst_v4l2_object_close (self->v4l2output);
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gst_v4l2_object_close (self->v4l2capture);
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gst_caps_replace (&self->probed_srccaps, NULL);
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gst_caps_replace (&self->probed_sinkcaps, NULL);
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return TRUE;
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}
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static gboolean
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gst_v4l2_video_enc_start (GstVideoEncoder * encoder)
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{
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GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
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GST_DEBUG_OBJECT (self, "Starting");
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gst_v4l2_object_unlock (self->v4l2output);
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g_atomic_int_set (&self->active, TRUE);
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self->output_flow = GST_FLOW_OK;
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return TRUE;
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}
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static gboolean
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gst_v4l2_video_enc_stop (GstVideoEncoder * encoder)
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{
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GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
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GST_DEBUG_OBJECT (self, "Stopping");
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gst_v4l2_object_unlock (self->v4l2output);
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gst_v4l2_object_unlock (self->v4l2capture);
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/* Wait for capture thread to stop */
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gst_pad_stop_task (encoder->srcpad);
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GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
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self->output_flow = GST_FLOW_OK;
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GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
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/* Should have been flushed already */
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g_assert (g_atomic_int_get (&self->active) == FALSE);
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g_assert (g_atomic_int_get (&self->processing) == FALSE);
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gst_v4l2_object_stop (self->v4l2output);
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gst_v4l2_object_stop (self->v4l2capture);
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if (self->input_state) {
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gst_video_codec_state_unref (self->input_state);
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self->input_state = NULL;
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}
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GST_DEBUG_OBJECT (self, "Stopped");
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return TRUE;
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}
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static gboolean
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gst_v4l2_encoder_cmd (GstV4l2Object * v4l2object, guint cmd, guint flags)
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{
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struct v4l2_encoder_cmd ecmd = { 0, };
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GST_DEBUG_OBJECT (v4l2object->element,
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"sending v4l2 encoder command %u with flags %u", cmd, flags);
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if (!GST_V4L2_IS_OPEN (v4l2object))
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return FALSE;
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ecmd.cmd = cmd;
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ecmd.flags = flags;
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if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_ENCODER_CMD, &ecmd) < 0)
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goto ecmd_failed;
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return TRUE;
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ecmd_failed:
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if (errno == ENOTTY) {
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GST_INFO_OBJECT (v4l2object->element,
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"Failed to send encoder command %u with flags %u for '%s'. (%s)",
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cmd, flags, v4l2object->videodev, g_strerror (errno));
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} else {
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GST_ERROR_OBJECT (v4l2object->element,
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"Failed to send encoder command %u with flags %u for '%s'. (%s)",
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cmd, flags, v4l2object->videodev, g_strerror (errno));
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}
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return FALSE;
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}
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static GstFlowReturn
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gst_v4l2_video_enc_finish (GstVideoEncoder * encoder)
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{
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GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
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GstFlowReturn ret = GST_FLOW_OK;
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if (gst_pad_get_task_state (encoder->srcpad) != GST_TASK_STARTED)
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goto done;
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GST_DEBUG_OBJECT (self, "Finishing encoding");
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/* drop the stream lock while draining, so remaining buffers can be
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* pushed from the src pad task thread */
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GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
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if (gst_v4l2_encoder_cmd (self->v4l2capture, V4L2_ENC_CMD_STOP, 0)) {
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GstTask *task = encoder->srcpad->task;
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/* Wait for the task to be drained */
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GST_DEBUG_OBJECT (self, "Waiting for encoder stop");
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GST_OBJECT_LOCK (task);
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while (GST_TASK_STATE (task) == GST_TASK_STARTED)
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GST_TASK_WAIT (task);
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GST_OBJECT_UNLOCK (task);
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ret = GST_FLOW_FLUSHING;
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}
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/* and ensure the processing thread has stopped in case another error
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* occured. */
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gst_v4l2_object_unlock (self->v4l2capture);
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gst_pad_stop_task (encoder->srcpad);
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GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
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if (ret == GST_FLOW_FLUSHING)
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ret = self->output_flow;
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GST_DEBUG_OBJECT (encoder, "Done draining buffers");
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done:
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return ret;
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}
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static gboolean
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gst_v4l2_video_enc_set_format (GstVideoEncoder * encoder,
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GstVideoCodecState * state)
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{
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gboolean ret = TRUE;
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GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
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GstV4l2Error error = GST_V4L2_ERROR_INIT;
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GstCaps *outcaps;
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GstVideoCodecState *output;
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GST_DEBUG_OBJECT (self, "Setting format: %" GST_PTR_FORMAT, state->caps);
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if (self->input_state) {
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if (gst_v4l2_object_caps_equal (self->v4l2output, state->caps)) {
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GST_DEBUG_OBJECT (self, "Compatible caps");
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return TRUE;
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}
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if (gst_v4l2_video_enc_finish (encoder) != GST_FLOW_OK)
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return FALSE;
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gst_v4l2_object_stop (self->v4l2output);
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gst_v4l2_object_stop (self->v4l2capture);
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gst_video_codec_state_unref (self->input_state);
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self->input_state = NULL;
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}
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outcaps = gst_pad_get_pad_template_caps (encoder->srcpad);
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outcaps = gst_caps_make_writable (outcaps);
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output = gst_video_encoder_set_output_state (encoder, outcaps, state);
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gst_video_codec_state_unref (output);
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if (!gst_video_encoder_negotiate (encoder))
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return FALSE;
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if (!gst_v4l2_object_set_format (self->v4l2output, state->caps, &error)) {
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gst_v4l2_error (self, &error);
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return FALSE;
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}
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self->input_state = gst_video_codec_state_ref (state);
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GST_DEBUG_OBJECT (self, "output caps: %" GST_PTR_FORMAT, state->caps);
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return ret;
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}
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static gboolean
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gst_v4l2_video_enc_flush (GstVideoEncoder * encoder)
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{
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GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
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GST_DEBUG_OBJECT (self, "Flushing");
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/* Ensure the processing thread has stopped for the reverse playback
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* iscount case */
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if (g_atomic_int_get (&self->processing)) {
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GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
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gst_v4l2_object_unlock_stop (self->v4l2output);
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gst_v4l2_object_unlock_stop (self->v4l2capture);
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gst_pad_stop_task (encoder->srcpad);
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GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
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}
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self->output_flow = GST_FLOW_OK;
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gst_v4l2_object_unlock_stop (self->v4l2output);
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gst_v4l2_object_unlock_stop (self->v4l2capture);
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return TRUE;
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}
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struct ProfileLevelCtx
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{
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GstV4l2VideoEnc *self;
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const gchar *profile;
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const gchar *level;
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};
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static gboolean
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get_string_list (GstStructure * s, const gchar * field, GQueue * queue)
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{
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const GValue *value;
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value = gst_structure_get_value (s, field);
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if (!value)
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return FALSE;
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if (GST_VALUE_HOLDS_LIST (value)) {
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guint i;
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if (gst_value_list_get_size (value) == 0)
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return FALSE;
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for (i = 0; i < gst_value_list_get_size (value); i++) {
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const GValue *item = gst_value_list_get_value (value, i);
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if (G_VALUE_HOLDS_STRING (item))
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g_queue_push_tail (queue, g_value_dup_string (item));
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}
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} else if (G_VALUE_HOLDS_STRING (value)) {
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g_queue_push_tail (queue, g_value_dup_string (value));
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}
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return TRUE;
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}
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static gboolean
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negotiate_profile_and_level (GstCapsFeatures * features, GstStructure * s,
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gpointer user_data)
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{
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struct ProfileLevelCtx *ctx = user_data;
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GstV4l2VideoEncClass *klass = GST_V4L2_VIDEO_ENC_GET_CLASS (ctx->self);
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GstV4l2Object *v4l2object = GST_V4L2_VIDEO_ENC (ctx->self)->v4l2output;
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GQueue profiles = G_QUEUE_INIT;
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GQueue levels = G_QUEUE_INIT;
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gboolean failed = FALSE;
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if (klass->profile_cid && get_string_list (s, "profile", &profiles)) {
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GList *l;
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for (l = profiles.head; l; l = l->next) {
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struct v4l2_control control = { 0, };
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gint v4l2_profile;
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const gchar *profile = l->data;
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GST_TRACE_OBJECT (ctx->self, "Trying profile %s", profile);
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control.id = klass->profile_cid;
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control.value = v4l2_profile = klass->profile_from_string (profile);
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if (control.value < 0)
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continue;
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if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_S_CTRL, &control) < 0) {
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GST_WARNING_OBJECT (ctx->self, "Failed to set %s profile: '%s'",
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klass->codec_name, g_strerror (errno));
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break;
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}
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profile = klass->profile_to_string (control.value);
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|
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if (control.value == v4l2_profile) {
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ctx->profile = profile;
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break;
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}
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if (g_list_find_custom (l, profile, g_str_equal)) {
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ctx->profile = profile;
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break;
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}
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}
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|
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if (profiles.length && !ctx->profile)
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failed = TRUE;
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|
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g_queue_foreach (&profiles, (GFunc) g_free, NULL);
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g_queue_clear (&profiles);
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}
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if (!failed && klass->level_cid && get_string_list (s, "level", &levels)) {
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GList *l;
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|
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for (l = levels.head; l; l = l->next) {
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struct v4l2_control control = { 0, };
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gint v4l2_level;
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const gchar *level = l->data;
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GST_TRACE_OBJECT (ctx->self, "Trying level %s", level);
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control.id = klass->level_cid;
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control.value = v4l2_level = klass->level_from_string (level);
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|
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if (control.value < 0)
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continue;
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|
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if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_S_CTRL, &control) < 0) {
|
|
GST_WARNING_OBJECT (ctx->self, "Failed to set %s level: '%s'",
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klass->codec_name, g_strerror (errno));
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break;
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|
}
|
|
|
|
level = klass->level_to_string (control.value);
|
|
|
|
if (control.value == v4l2_level) {
|
|
ctx->level = level;
|
|
break;
|
|
}
|
|
|
|
if (g_list_find_custom (l, level, g_str_equal)) {
|
|
ctx->level = level;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (levels.length && !ctx->level)
|
|
failed = TRUE;
|
|
|
|
g_queue_foreach (&levels, (GFunc) g_free, NULL);
|
|
g_queue_clear (&levels);
|
|
}
|
|
|
|
/* If it failed, we continue */
|
|
return failed;
|
|
}
|
|
|
|
static gboolean
|
|
gst_v4l2_video_enc_negotiate (GstVideoEncoder * encoder)
|
|
{
|
|
GstV4l2VideoEncClass *klass = GST_V4L2_VIDEO_ENC_GET_CLASS (encoder);
|
|
GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
|
|
GstV4l2Object *v4l2object = self->v4l2output;
|
|
GstCaps *allowed_caps;
|
|
struct ProfileLevelCtx ctx = { self, NULL, NULL };
|
|
GstVideoCodecState *state;
|
|
GstStructure *s;
|
|
|
|
GST_DEBUG_OBJECT (self, "Negotiating %s profile and level.",
|
|
klass->codec_name);
|
|
|
|
/* Only renegotiate on upstream changes */
|
|
if (self->input_state)
|
|
return TRUE;
|
|
|
|
allowed_caps = gst_pad_get_allowed_caps (GST_VIDEO_ENCODER_SRC_PAD (encoder));
|
|
|
|
if (allowed_caps) {
|
|
|
|
if (gst_caps_is_empty (allowed_caps))
|
|
goto not_negotiated;
|
|
|
|
allowed_caps = gst_caps_make_writable (allowed_caps);
|
|
|
|
/* negotiate_profile_and_level() will return TRUE on failure to keep
|
|
* iterating, if gst_caps_foreach() returns TRUE it means there was no
|
|
* compatible profile and level in any of the structure */
|
|
if (gst_caps_foreach (allowed_caps, negotiate_profile_and_level, &ctx)) {
|
|
goto no_profile_level;
|
|
}
|
|
}
|
|
|
|
if (klass->profile_cid && !ctx.profile) {
|
|
struct v4l2_control control = { 0, };
|
|
|
|
control.id = klass->profile_cid;
|
|
|
|
if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CTRL, &control) < 0)
|
|
goto g_ctrl_failed;
|
|
|
|
ctx.profile = klass->profile_to_string (control.value);
|
|
}
|
|
|
|
if (klass->level_cid && !ctx.level) {
|
|
struct v4l2_control control = { 0, };
|
|
|
|
control.id = klass->level_cid;
|
|
|
|
if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CTRL, &control) < 0)
|
|
goto g_ctrl_failed;
|
|
|
|
ctx.level = klass->level_to_string (control.value);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (self, "Selected %s profile %s at level %s",
|
|
klass->codec_name, ctx.profile, ctx.level);
|
|
|
|
state = gst_video_encoder_get_output_state (encoder);
|
|
s = gst_caps_get_structure (state->caps, 0);
|
|
|
|
if (klass->profile_cid)
|
|
gst_structure_set (s, "profile", G_TYPE_STRING, ctx.profile, NULL);
|
|
|
|
if (klass->level_cid)
|
|
gst_structure_set (s, "level", G_TYPE_STRING, ctx.level, NULL);
|
|
|
|
if (!GST_VIDEO_ENCODER_CLASS (parent_class)->negotiate (encoder))
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
|
|
g_ctrl_failed:
|
|
GST_WARNING_OBJECT (self, "Failed to get %s profile and level: '%s'",
|
|
klass->codec_name, g_strerror (errno));
|
|
goto not_negotiated;
|
|
|
|
no_profile_level:
|
|
GST_WARNING_OBJECT (self, "No compatible level and profile in caps: %"
|
|
GST_PTR_FORMAT, allowed_caps);
|
|
goto not_negotiated;
|
|
|
|
not_negotiated:
|
|
if (allowed_caps)
|
|
gst_caps_unref (allowed_caps);
|
|
return FALSE;
|
|
}
|
|
|
|
static GstVideoCodecFrame *
|
|
gst_v4l2_video_enc_get_oldest_frame (GstVideoEncoder * encoder)
|
|
{
|
|
GstVideoCodecFrame *frame = NULL;
|
|
GList *frames, *l;
|
|
gint count = 0;
|
|
|
|
frames = gst_video_encoder_get_frames (encoder);
|
|
|
|
for (l = frames; l != NULL; l = l->next) {
|
|
GstVideoCodecFrame *f = l->data;
|
|
|
|
if (!frame || frame->pts > f->pts)
|
|
frame = f;
|
|
|
|
count++;
|
|
}
|
|
|
|
if (frame) {
|
|
GST_LOG_OBJECT (encoder,
|
|
"Oldest frame is %d %" GST_TIME_FORMAT
|
|
" and %d frames left",
|
|
frame->system_frame_number, GST_TIME_ARGS (frame->pts), count - 1);
|
|
gst_video_codec_frame_ref (frame);
|
|
}
|
|
|
|
g_list_free_full (frames, (GDestroyNotify) gst_video_codec_frame_unref);
|
|
|
|
return frame;
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_video_enc_loop (GstVideoEncoder * encoder)
|
|
{
|
|
GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
|
|
GstVideoCodecFrame *frame;
|
|
GstBuffer *buffer = NULL;
|
|
GstFlowReturn ret;
|
|
|
|
GST_LOG_OBJECT (encoder, "Allocate output buffer");
|
|
|
|
buffer = gst_video_encoder_allocate_output_buffer (encoder,
|
|
self->v4l2capture->info.size);
|
|
|
|
if (NULL == buffer) {
|
|
ret = GST_FLOW_FLUSHING;
|
|
goto beach;
|
|
}
|
|
|
|
|
|
/* FIXME Check if buffer isn't the last one here */
|
|
|
|
GST_LOG_OBJECT (encoder, "Process output buffer");
|
|
ret =
|
|
gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL
|
|
(self->v4l2capture->pool), &buffer);
|
|
|
|
if (ret != GST_FLOW_OK)
|
|
goto beach;
|
|
|
|
frame = gst_v4l2_video_enc_get_oldest_frame (encoder);
|
|
|
|
if (frame) {
|
|
/* At this point, the delta unit buffer flag is already correctly set by
|
|
* gst_v4l2_buffer_pool_process. Since gst_video_encoder_finish_frame
|
|
* will overwrite it from GST_VIDEO_CODEC_FRAME_IS_SYNC_POINT (frame),
|
|
* set that here.
|
|
*/
|
|
if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT))
|
|
GST_VIDEO_CODEC_FRAME_UNSET_SYNC_POINT (frame);
|
|
else
|
|
GST_VIDEO_CODEC_FRAME_SET_SYNC_POINT (frame);
|
|
frame->output_buffer = buffer;
|
|
buffer = NULL;
|
|
ret = gst_video_encoder_finish_frame (encoder, frame);
|
|
|
|
if (ret != GST_FLOW_OK)
|
|
goto beach;
|
|
} else {
|
|
GST_WARNING_OBJECT (encoder, "Encoder is producing too many buffers");
|
|
gst_buffer_unref (buffer);
|
|
}
|
|
|
|
return;
|
|
|
|
beach:
|
|
GST_DEBUG_OBJECT (encoder, "Leaving output thread");
|
|
|
|
gst_buffer_replace (&buffer, NULL);
|
|
self->output_flow = ret;
|
|
g_atomic_int_set (&self->processing, FALSE);
|
|
gst_v4l2_object_unlock (self->v4l2output);
|
|
gst_pad_pause_task (encoder->srcpad);
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_video_enc_loop_stopped (GstV4l2VideoEnc * self)
|
|
{
|
|
if (g_atomic_int_get (&self->processing)) {
|
|
GST_DEBUG_OBJECT (self, "Early stop of encoding thread");
|
|
self->output_flow = GST_FLOW_FLUSHING;
|
|
g_atomic_int_set (&self->processing, FALSE);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (self, "Encoding task destroyed: %s",
|
|
gst_flow_get_name (self->output_flow));
|
|
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_v4l2_video_enc_handle_frame (GstVideoEncoder * encoder,
|
|
GstVideoCodecFrame * frame)
|
|
{
|
|
GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstTaskState task_state;
|
|
|
|
GST_DEBUG_OBJECT (self, "Handling frame %d", frame->system_frame_number);
|
|
|
|
if (G_UNLIKELY (!g_atomic_int_get (&self->active)))
|
|
goto flushing;
|
|
|
|
task_state = gst_pad_get_task_state (GST_VIDEO_DECODER_SRC_PAD (self));
|
|
if (task_state == GST_TASK_STOPPED || task_state == GST_TASK_PAUSED) {
|
|
GstBufferPool *pool = GST_BUFFER_POOL (self->v4l2output->pool);
|
|
|
|
/* It possible that the processing thread stopped due to an error */
|
|
if (self->output_flow != GST_FLOW_OK &&
|
|
self->output_flow != GST_FLOW_FLUSHING) {
|
|
GST_DEBUG_OBJECT (self, "Processing loop stopped with error, leaving");
|
|
ret = self->output_flow;
|
|
goto drop;
|
|
}
|
|
|
|
/* Ensure input internal pool is active */
|
|
if (!gst_buffer_pool_is_active (pool)) {
|
|
GstStructure *config = gst_buffer_pool_get_config (pool);
|
|
guint min = MAX (self->v4l2output->min_buffers, GST_V4L2_MIN_BUFFERS);
|
|
|
|
gst_buffer_pool_config_set_params (config, self->input_state->caps,
|
|
self->v4l2output->info.size, min, min);
|
|
|
|
/* There is no reason to refuse this config */
|
|
if (!gst_buffer_pool_set_config (pool, config))
|
|
goto activate_failed;
|
|
|
|
if (!gst_buffer_pool_set_active (pool, TRUE))
|
|
goto activate_failed;
|
|
}
|
|
|
|
if (!gst_buffer_pool_set_active
|
|
(GST_BUFFER_POOL (self->v4l2capture->pool), TRUE)) {
|
|
GST_WARNING_OBJECT (self, "Could not activate capture buffer pool.");
|
|
goto activate_failed;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (self, "Starting encoding thread");
|
|
|
|
/* Start the processing task, when it quits, the task will disable input
|
|
* processing to unlock input if draining, or prevent potential block */
|
|
if (!gst_pad_start_task (encoder->srcpad,
|
|
(GstTaskFunction) gst_v4l2_video_enc_loop, self,
|
|
(GDestroyNotify) gst_v4l2_video_enc_loop_stopped))
|
|
goto start_task_failed;
|
|
}
|
|
|
|
if (frame->input_buffer) {
|
|
GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
|
|
ret =
|
|
gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL
|
|
(self->v4l2output->pool), &frame->input_buffer);
|
|
GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
|
|
|
|
if (ret == GST_FLOW_FLUSHING) {
|
|
if (gst_pad_get_task_state (GST_VIDEO_DECODER_SRC_PAD (self)) !=
|
|
GST_TASK_STARTED)
|
|
ret = self->output_flow;
|
|
goto drop;
|
|
} else if (ret != GST_FLOW_OK) {
|
|
goto process_failed;
|
|
}
|
|
}
|
|
|
|
gst_video_codec_frame_unref (frame);
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
activate_failed:
|
|
{
|
|
GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
|
|
(_("Failed to allocate required memory.")),
|
|
("Buffer pool activation failed"));
|
|
return GST_FLOW_ERROR;
|
|
|
|
}
|
|
flushing:
|
|
{
|
|
ret = GST_FLOW_FLUSHING;
|
|
goto drop;
|
|
}
|
|
start_task_failed:
|
|
{
|
|
GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
|
|
(_("Failed to start encoding thread.")), (NULL));
|
|
g_atomic_int_set (&self->processing, FALSE);
|
|
ret = GST_FLOW_ERROR;
|
|
goto drop;
|
|
}
|
|
process_failed:
|
|
{
|
|
GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
|
|
(_("Failed to process frame.")),
|
|
("Maybe be due to not enough memory or failing driver"));
|
|
ret = GST_FLOW_ERROR;
|
|
goto drop;
|
|
}
|
|
drop:
|
|
{
|
|
gst_video_encoder_finish_frame (encoder, frame);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_v4l2_video_enc_decide_allocation (GstVideoEncoder *
|
|
encoder, GstQuery * query)
|
|
{
|
|
GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
|
|
GstVideoCodecState *state = gst_video_encoder_get_output_state (encoder);
|
|
GstCaps *caps;
|
|
GstV4l2Error error = GST_V4L2_ERROR_INIT;
|
|
GstClockTime latency;
|
|
gboolean ret = FALSE;
|
|
|
|
/* We need to set the format here, since this is called right after
|
|
* GstVideoEncoder have set the width, height and framerate into the state
|
|
* caps. These are needed by the driver to calculate the buffer size and to
|
|
* implement bitrate adaptation. */
|
|
caps = gst_caps_copy (state->caps);
|
|
gst_structure_remove_field (gst_caps_get_structure (caps, 0), "colorimetry");
|
|
if (!gst_v4l2_object_set_format (self->v4l2capture, caps, &error)) {
|
|
gst_v4l2_error (self, &error);
|
|
gst_caps_unref (caps);
|
|
ret = FALSE;
|
|
goto done;
|
|
}
|
|
gst_caps_unref (caps);
|
|
|
|
if (gst_v4l2_object_decide_allocation (self->v4l2capture, query)) {
|
|
GstVideoEncoderClass *enc_class = GST_VIDEO_ENCODER_CLASS (parent_class);
|
|
ret = enc_class->decide_allocation (encoder, query);
|
|
}
|
|
|
|
/* FIXME This may not be entirely correct, as encoder may keep some
|
|
* observation withouth delaying the encoding. Linux Media API need some
|
|
* more work to explicitly expressed the decoder / encoder latency. This
|
|
* value will then become max latency, and the reported driver latency would
|
|
* become the min latency. */
|
|
latency = self->v4l2capture->min_buffers * self->v4l2capture->duration;
|
|
gst_video_encoder_set_latency (encoder, latency, latency);
|
|
|
|
done:
|
|
gst_video_codec_state_unref (state);
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_v4l2_video_enc_propose_allocation (GstVideoEncoder *
|
|
encoder, GstQuery * query)
|
|
{
|
|
GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
|
|
gboolean ret = FALSE;
|
|
|
|
GST_DEBUG_OBJECT (self, "called");
|
|
|
|
if (query == NULL)
|
|
ret = TRUE;
|
|
else
|
|
ret = gst_v4l2_object_propose_allocation (self->v4l2output, query);
|
|
|
|
if (ret)
|
|
ret = GST_VIDEO_ENCODER_CLASS (parent_class)->propose_allocation (encoder,
|
|
query);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_v4l2_video_enc_src_query (GstVideoEncoder * encoder, GstQuery * query)
|
|
{
|
|
gboolean ret = TRUE;
|
|
GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_CAPS:{
|
|
GstCaps *filter, *result = NULL;
|
|
GstPad *pad = GST_VIDEO_ENCODER_SRC_PAD (encoder);
|
|
|
|
gst_query_parse_caps (query, &filter);
|
|
|
|
/* FIXME Try and not probe the entire encoder, but only the implement
|
|
* subclass format */
|
|
if (self->probed_srccaps) {
|
|
GstCaps *tmpl = gst_pad_get_pad_template_caps (pad);
|
|
result = gst_caps_intersect (tmpl, self->probed_srccaps);
|
|
gst_caps_unref (tmpl);
|
|
} else
|
|
result = gst_pad_get_pad_template_caps (pad);
|
|
|
|
if (filter) {
|
|
GstCaps *tmp = result;
|
|
result =
|
|
gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);
|
|
gst_caps_unref (tmp);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (self, "Returning src caps %" GST_PTR_FORMAT, result);
|
|
|
|
gst_query_set_caps_result (query, result);
|
|
gst_caps_unref (result);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
ret = GST_VIDEO_ENCODER_CLASS (parent_class)->src_query (encoder, query);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_v4l2_video_enc_sink_query (GstVideoEncoder * encoder, GstQuery * query)
|
|
{
|
|
gboolean ret = TRUE;
|
|
GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_CAPS:{
|
|
GstCaps *filter, *result = NULL;
|
|
GstPad *pad = GST_VIDEO_ENCODER_SINK_PAD (encoder);
|
|
|
|
gst_query_parse_caps (query, &filter);
|
|
|
|
if (self->probed_sinkcaps)
|
|
result = gst_caps_ref (self->probed_sinkcaps);
|
|
else
|
|
result = gst_pad_get_pad_template_caps (pad);
|
|
|
|
if (filter) {
|
|
GstCaps *tmp = result;
|
|
result =
|
|
gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);
|
|
gst_caps_unref (tmp);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (self, "Returning sink caps %" GST_PTR_FORMAT, result);
|
|
|
|
gst_query_set_caps_result (query, result);
|
|
gst_caps_unref (result);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
ret = GST_VIDEO_ENCODER_CLASS (parent_class)->sink_query (encoder, query);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_v4l2_video_enc_sink_event (GstVideoEncoder * encoder, GstEvent * event)
|
|
{
|
|
GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (encoder);
|
|
gboolean ret;
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_FLUSH_START:
|
|
GST_DEBUG_OBJECT (self, "flush start");
|
|
gst_v4l2_object_unlock (self->v4l2output);
|
|
gst_v4l2_object_unlock (self->v4l2capture);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_VIDEO_ENCODER_CLASS (parent_class)->sink_event (encoder, event);
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_FLUSH_START:
|
|
gst_pad_stop_task (encoder->srcpad);
|
|
GST_DEBUG_OBJECT (self, "flush start done");
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_v4l2_video_enc_change_state (GstElement * element,
|
|
GstStateChange transition)
|
|
{
|
|
GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (element);
|
|
|
|
if (transition == GST_STATE_CHANGE_PAUSED_TO_READY) {
|
|
g_atomic_int_set (&self->active, FALSE);
|
|
gst_v4l2_object_unlock (self->v4l2output);
|
|
gst_v4l2_object_unlock (self->v4l2capture);
|
|
}
|
|
|
|
return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
}
|
|
|
|
|
|
static void
|
|
gst_v4l2_video_enc_dispose (GObject * object)
|
|
{
|
|
GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (object);
|
|
|
|
gst_caps_replace (&self->probed_sinkcaps, NULL);
|
|
gst_caps_replace (&self->probed_srccaps, NULL);
|
|
|
|
G_OBJECT_CLASS (parent_class)->dispose (object);
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_video_enc_finalize (GObject * object)
|
|
{
|
|
GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (object);
|
|
|
|
gst_v4l2_object_destroy (self->v4l2capture);
|
|
gst_v4l2_object_destroy (self->v4l2output);
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
|
|
static void
|
|
gst_v4l2_video_enc_init (GstV4l2VideoEnc * self)
|
|
{
|
|
/* V4L2 object are created in subinstance_init */
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_video_enc_subinstance_init (GTypeInstance * instance, gpointer g_class)
|
|
{
|
|
GstV4l2VideoEncClass *klass = GST_V4L2_VIDEO_ENC_CLASS (g_class);
|
|
GstV4l2VideoEnc *self = GST_V4L2_VIDEO_ENC (instance);
|
|
|
|
self->v4l2output = gst_v4l2_object_new (GST_ELEMENT (self),
|
|
GST_OBJECT (GST_VIDEO_ENCODER_SINK_PAD (self)),
|
|
V4L2_BUF_TYPE_VIDEO_OUTPUT, klass->default_device,
|
|
gst_v4l2_get_output, gst_v4l2_set_output, NULL);
|
|
self->v4l2output->no_initial_format = TRUE;
|
|
self->v4l2output->keep_aspect = FALSE;
|
|
|
|
self->v4l2capture = gst_v4l2_object_new (GST_ELEMENT (self),
|
|
GST_OBJECT (GST_VIDEO_ENCODER_SRC_PAD (self)),
|
|
V4L2_BUF_TYPE_VIDEO_CAPTURE, klass->default_device,
|
|
gst_v4l2_get_input, gst_v4l2_set_input, NULL);
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_video_enc_class_init (GstV4l2VideoEncClass * klass)
|
|
{
|
|
GstElementClass *element_class;
|
|
GObjectClass *gobject_class;
|
|
GstVideoEncoderClass *video_encoder_class;
|
|
|
|
parent_class = g_type_class_peek_parent (klass);
|
|
|
|
element_class = (GstElementClass *) klass;
|
|
gobject_class = (GObjectClass *) klass;
|
|
video_encoder_class = (GstVideoEncoderClass *) klass;
|
|
|
|
GST_DEBUG_CATEGORY_INIT (gst_v4l2_video_enc_debug, "v4l2videoenc", 0,
|
|
"V4L2 Video Encoder");
|
|
|
|
gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_dispose);
|
|
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_finalize);
|
|
gobject_class->set_property =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_set_property);
|
|
gobject_class->get_property =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_get_property);
|
|
|
|
video_encoder_class->open = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_open);
|
|
video_encoder_class->close = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_close);
|
|
video_encoder_class->start = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_start);
|
|
video_encoder_class->stop = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_stop);
|
|
video_encoder_class->finish = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_finish);
|
|
video_encoder_class->flush = GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_flush);
|
|
video_encoder_class->set_format =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_set_format);
|
|
video_encoder_class->negotiate =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_negotiate);
|
|
video_encoder_class->decide_allocation =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_decide_allocation);
|
|
video_encoder_class->propose_allocation =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_propose_allocation);
|
|
video_encoder_class->sink_query =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_sink_query);
|
|
video_encoder_class->src_query =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_src_query);
|
|
video_encoder_class->sink_event =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_sink_event);
|
|
video_encoder_class->handle_frame =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_handle_frame);
|
|
|
|
element_class->change_state =
|
|
GST_DEBUG_FUNCPTR (gst_v4l2_video_enc_change_state);
|
|
|
|
gst_v4l2_object_install_m2m_properties_helper (gobject_class);
|
|
}
|
|
|
|
static void
|
|
gst_v4l2_video_enc_subclass_init (gpointer g_class, gpointer data)
|
|
{
|
|
GstV4l2VideoEncClass *klass = GST_V4L2_VIDEO_ENC_CLASS (g_class);
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
|
|
GstV4l2VideoEncCData *cdata = data;
|
|
|
|
klass->default_device = cdata->device;
|
|
|
|
/* Note: gst_pad_template_new() take the floating ref from the caps */
|
|
gst_element_class_add_pad_template (element_class,
|
|
gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
|
|
cdata->sink_caps));
|
|
gst_element_class_add_pad_template (element_class,
|
|
gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
|
|
cdata->src_caps));
|
|
|
|
gst_caps_unref (cdata->sink_caps);
|
|
gst_caps_unref (cdata->src_caps);
|
|
g_free (cdata);
|
|
}
|
|
|
|
/* Probing functions */
|
|
gboolean
|
|
gst_v4l2_is_video_enc (GstCaps * sink_caps, GstCaps * src_caps,
|
|
GstCaps * codec_caps)
|
|
{
|
|
gboolean ret = FALSE;
|
|
gboolean (*check_caps) (const GstCaps *, const GstCaps *);
|
|
|
|
if (codec_caps) {
|
|
check_caps = gst_caps_can_intersect;
|
|
} else {
|
|
codec_caps = gst_v4l2_object_get_codec_caps ();
|
|
check_caps = gst_caps_is_subset;
|
|
}
|
|
|
|
if (gst_caps_is_subset (sink_caps, gst_v4l2_object_get_raw_caps ())
|
|
&& check_caps (src_caps, codec_caps))
|
|
ret = TRUE;
|
|
|
|
return ret;
|
|
}
|
|
|
|
void
|
|
gst_v4l2_video_enc_register (GstPlugin * plugin, GType type,
|
|
const char *codec, const gchar * basename, const gchar * device_path,
|
|
GstCaps * sink_caps, GstCaps * codec_caps, GstCaps * src_caps)
|
|
{
|
|
GstCaps *filtered_caps;
|
|
GTypeQuery type_query;
|
|
GTypeInfo type_info = { 0, };
|
|
GType subtype;
|
|
gchar *type_name;
|
|
GstV4l2VideoEncCData *cdata;
|
|
|
|
filtered_caps = gst_caps_intersect (src_caps, codec_caps);
|
|
|
|
cdata = g_new0 (GstV4l2VideoEncCData, 1);
|
|
cdata->device = g_strdup (device_path);
|
|
cdata->sink_caps = gst_caps_ref (sink_caps);
|
|
cdata->src_caps = gst_caps_ref (filtered_caps);
|
|
|
|
g_type_query (type, &type_query);
|
|
memset (&type_info, 0, sizeof (type_info));
|
|
type_info.class_size = type_query.class_size;
|
|
type_info.instance_size = type_query.instance_size;
|
|
type_info.class_init = gst_v4l2_video_enc_subclass_init;
|
|
type_info.class_data = cdata;
|
|
type_info.instance_init = gst_v4l2_video_enc_subinstance_init;
|
|
|
|
/* The first encoder to be registered should use a constant name, like
|
|
* v4l2h264enc, for any additional encoders, we create unique names. Encoder
|
|
* names may change between boots, so this should help gain stable names for
|
|
* the most common use cases. */
|
|
type_name = g_strdup_printf ("v4l2%senc", codec);
|
|
|
|
if (g_type_from_name (type_name) != 0) {
|
|
g_free (type_name);
|
|
type_name = g_strdup_printf ("v4l2%s%senc", basename, codec);
|
|
}
|
|
|
|
subtype = g_type_register_static (type, type_name, &type_info, 0);
|
|
|
|
if (!gst_element_register (plugin, type_name, GST_RANK_PRIMARY + 1, subtype))
|
|
GST_WARNING ("Failed to register plugin '%s'", type_name);
|
|
|
|
g_free (type_name);
|
|
}
|