--- /dev/null
+/*
+ * Copyright (C) 2014 Collabora Ltd.
+ * Author: Nicolas Dufresne <nicolas.dufresne@collabora.co.uk>
+ *
+ * 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 "gstv4l2videodec.h"
+#include "v4l2_calls.h"
+
+#include <string.h>
+#include <gst/gst-i18n-plugin.h>
+
+#define DEFAULT_PROP_DEVICE "/dev/video8"
+
+GST_DEBUG_CATEGORY_STATIC (gst_v4l2_video_dec_debug);
+#define GST_CAT_DEFAULT gst_v4l2_video_dec_debug
+
+#define parent_class gst_v4l2_video_dec_parent_class
+G_DEFINE_TYPE (GstV4l2VideoDec, gst_v4l2_video_dec, GST_TYPE_VIDEO_DECODER);
+
+static gboolean gst_v4l2_video_dec_flush (GstVideoDecoder * decoder);
+
+enum
+{
+ PROP_0,
+ V4L2_STD_OBJECT_PROPS,
+ PROP_CAPTURE_IO_MODE,
+};
+
+static void
+gst_v4l2_video_dec_set_property (GObject * object,
+ guint prop_id, const GValue * value, GParamSpec * pspec)
+{
+ GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (object);
+
+ switch (prop_id) {
+ /* Split IO mode so output is configure through 'io-mode' and capture
+ * through 'capture-io-mode' */
+ case PROP_IO_MODE:
+ gst_v4l2_object_set_property_helper (self->v4l2output, prop_id, value,
+ pspec);
+ break;
+ case PROP_CAPTURE_IO_MODE:
+ gst_v4l2_object_set_property_helper (self->v4l2capture, prop_id, value,
+ pspec);
+ break;
+
+ case PROP_DEVICE:
+ gst_v4l2_object_set_property_helper (self->v4l2output, prop_id, value,
+ pspec);
+ gst_v4l2_object_set_property_helper (self->v4l2capture, prop_id, value,
+ pspec);
+ break;
+
+ /* By default, only set on output */
+ default:
+ if (!gst_v4l2_object_set_property_helper (self->v4l2output,
+ prop_id, value, pspec)) {
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ }
+ break;
+ }
+}
+
+static void
+gst_v4l2_video_dec_get_property (GObject * object,
+ guint prop_id, GValue * value, GParamSpec * pspec)
+{
+ GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (object);
+
+ switch (prop_id) {
+ case PROP_IO_MODE:
+ gst_v4l2_object_get_property_helper (self->v4l2output, prop_id, value,
+ pspec);
+ break;
+ case PROP_CAPTURE_IO_MODE:
+ gst_v4l2_object_get_property_helper (self->v4l2output, PROP_IO_MODE,
+ value, pspec);
+ break;
+
+ /* By default read from output */
+ default:
+ if (!gst_v4l2_object_get_property_helper (self->v4l2output,
+ prop_id, value, pspec)) {
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ }
+ break;
+ }
+}
+
+static gboolean
+gst_v4l2_video_dec_open (GstVideoDecoder * decoder)
+{
+ GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
+
+ GST_DEBUG_OBJECT (self, "Opening");
+
+ if (!gst_v4l2_object_open (self->v4l2output))
+ goto failure;
+
+ if (!gst_v4l2_object_open_shared (self->v4l2capture, self->v4l2output))
+ goto failure;
+
+ self->probed_sinkcaps = gst_v4l2_object_get_caps (self->v4l2output,
+ gst_v4l2_object_get_codec_caps ());
+
+ if (gst_caps_is_empty (self->probed_sinkcaps))
+ goto no_encoded_format;
+
+ self->probed_srccaps = gst_v4l2_object_get_caps (self->v4l2capture,
+ gst_v4l2_object_get_raw_caps ());
+
+ if (gst_caps_is_empty (self->probed_srccaps))
+ goto no_raw_format;
+
+ return TRUE;
+
+no_encoded_format:
+ GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
+ (_("Encoder on device %s has no supported input format"),
+ self->v4l2output->videodev), (NULL));
+ goto failure;
+
+
+no_raw_format:
+ GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
+ (_("Encoder on device %s has no supported output format"),
+ self->v4l2output->videodev), (NULL));
+ goto failure;
+
+failure:
+ if (GST_V4L2_IS_OPEN (self->v4l2output))
+ gst_v4l2_object_close (self->v4l2output);
+
+ if (GST_V4L2_IS_OPEN (self->v4l2capture))
+ gst_v4l2_object_close (self->v4l2capture);
+
+ gst_caps_replace (&self->probed_srccaps, NULL);
+ gst_caps_replace (&self->probed_sinkcaps, NULL);
+
+ return FALSE;
+}
+
+static gboolean
+gst_v4l2_video_dec_close (GstVideoDecoder * decoder)
+{
+ GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
+
+ GST_DEBUG_OBJECT (self, "Closing");
+
+ gst_v4l2_object_close (self->v4l2output);
+ gst_v4l2_object_close (self->v4l2capture);
+ gst_caps_replace (&self->probed_srccaps, NULL);
+ gst_caps_replace (&self->probed_sinkcaps, NULL);
+
+ return TRUE;
+}
+
+static gboolean
+gst_v4l2_video_dec_start (GstVideoDecoder * decoder)
+{
+ GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
+
+ GST_DEBUG_OBJECT (self, "Starting");
+
+ gst_v4l2_object_unlock (self->v4l2output);
+ g_atomic_int_set (&self->active, TRUE);
+ self->output_flow = GST_FLOW_OK;
+
+ return TRUE;
+}
+
+static gboolean
+gst_v4l2_video_dec_stop (GstVideoDecoder * decoder)
+{
+ GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
+
+ GST_DEBUG_OBJECT (self, "Stopping");
+
+ /* Should have been flushed already */
+ g_assert (g_atomic_int_get (&self->active) == FALSE);
+ g_assert (g_atomic_int_get (&self->processing) == FALSE);
+
+ gst_v4l2_object_stop (self->v4l2output);
+ gst_v4l2_object_stop (self->v4l2capture);
+
+ if (self->input_state) {
+ gst_video_codec_state_unref (self->input_state);
+ self->input_state = NULL;
+ }
+
+ GST_DEBUG_OBJECT (self, "Stopped");
+
+ return TRUE;
+}
+
+static gboolean
+gst_v4l2_video_dec_set_format (GstVideoDecoder * decoder,
+ GstVideoCodecState * state)
+{
+ gboolean ret = TRUE;
+ GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
+
+ GST_DEBUG_OBJECT (self, "Setting format: %" GST_PTR_FORMAT, state->caps);
+
+ if (self->input_state) {
+ if (gst_v4l2_object_caps_equal (self->v4l2output, state->caps)) {
+ GST_DEBUG_OBJECT (self, "Compatible caps");
+ goto done;
+ }
+ gst_video_codec_state_unref (self->input_state);
+
+ /* FIXME we probably need to do more work if pools are active */
+ }
+
+ ret = gst_v4l2_object_set_format (self->v4l2output, state->caps);
+
+ if (ret)
+ self->input_state = gst_video_codec_state_ref (state);
+
+done:
+ return ret;
+}
+
+static gboolean
+gst_v4l2_video_dec_flush (GstVideoDecoder * decoder)
+{
+ GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
+
+ GST_DEBUG_OBJECT (self, "Flushing");
+
+ /* Wait for capture thread to stop */
+ gst_pad_stop_task (decoder->srcpad);
+ self->output_flow = GST_FLOW_OK;
+
+ gst_v4l2_buffer_pool_flush (GST_V4L2_BUFFER_POOL (self->v4l2output->pool));
+ gst_v4l2_buffer_pool_flush (GST_V4L2_BUFFER_POOL (self->v4l2capture->pool));
+
+ /* Output will remain flushing until new frame comes in */
+ gst_v4l2_object_unlock_stop (self->v4l2capture);
+
+ return TRUE;
+}
+
+static gboolean
+gst_v4l2_video_dec_negotiate (GstVideoDecoder * decoder)
+{
+ return GST_VIDEO_DECODER_CLASS (parent_class)->negotiate (decoder);
+}
+
+static GstFlowReturn
+gst_v4l2_video_dec_finish (GstVideoDecoder * decoder)
+{
+ GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
+ GstFlowReturn ret = GST_FLOW_OK;
+ GstBuffer *buffer;
+
+ if (!self->input_state)
+ goto done;
+
+ GST_DEBUG_OBJECT (self, "Finishing decoding");
+
+ /* Keep queuing empty buffers until the processing thread has stopped,
+ * _pool_process() will return FLUSHING when that happened */
+ GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
+ while (ret == GST_FLOW_OK) {
+ buffer = gst_buffer_new ();
+ ret =
+ gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL (self->
+ v4l2output->pool), buffer);
+ gst_buffer_unref (buffer);
+ }
+ GST_VIDEO_DECODER_STREAM_LOCK (decoder);
+
+ g_assert (g_atomic_int_get (&self->processing) == FALSE);
+
+ if (ret == GST_FLOW_FLUSHING)
+ ret = self->output_flow;
+
+ GST_DEBUG_OBJECT (decoder, "Done draining buffers");
+
+done:
+ return ret;
+}
+
+static GstVideoCodecFrame *
+gst_v4l2_video_dec_get_oldest_frame (GstVideoDecoder * decoder)
+{
+ GstVideoCodecFrame *frame = NULL;
+ GList *frames, *l;
+ gint count = 0;
+
+ frames = gst_video_decoder_get_frames (decoder);
+
+ 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 (decoder,
+ "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_dec_loop (GstVideoDecoder * decoder)
+{
+ GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
+ GstBufferPool *pool;
+ GstVideoCodecFrame *frame;
+ GstBuffer *buffer = NULL;
+ GstFlowReturn ret;
+
+ GST_LOG_OBJECT (decoder, "Allocate output buffer");
+
+ /* We cannot use the base class allotate helper since it taking the internal
+ * stream lock. we know that the acquire may need to poll until more frames
+ * comes in and holding this lock would prevent that.
+ */
+ pool = gst_video_decoder_get_buffer_pool (decoder);
+ ret = gst_buffer_pool_acquire_buffer (pool, &buffer, NULL);
+ g_object_unref (pool);
+
+ if (ret != GST_FLOW_OK)
+ goto beach;
+
+ /* Check if buffer isn't the last one */
+ if (gst_buffer_get_size (buffer) == 0)
+ goto beach;
+
+ GST_LOG_OBJECT (decoder, "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_dec_get_oldest_frame (decoder);
+
+ if (frame) {
+ frame->output_buffer = buffer;
+ buffer = NULL;
+ ret = gst_video_decoder_finish_frame (decoder, frame);
+
+ if (ret != GST_FLOW_OK)
+ goto beach;
+ } else {
+ GST_WARNING_OBJECT (decoder, "Decoder is producing too many buffers");
+ gst_buffer_unref (buffer);
+ }
+
+ return;
+
+beach:
+ GST_DEBUG_OBJECT (decoder, "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 (decoder->srcpad);
+}
+
+static GstFlowReturn
+gst_v4l2_video_dec_handle_frame (GstVideoDecoder * decoder,
+ GstVideoCodecFrame * frame)
+{
+ GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
+ GstFlowReturn ret = GST_FLOW_OK;
+
+ GST_DEBUG_OBJECT (self, "Handling frame %d", frame->system_frame_number);
+
+ if (G_UNLIKELY (!g_atomic_int_get (&self->active)))
+ goto flushing;
+
+ if (G_UNLIKELY (!GST_V4L2_IS_ACTIVE (self->v4l2output))) {
+ if (!gst_v4l2_object_set_format (self->v4l2output, self->input_state->caps))
+ goto not_negotiated;
+ }
+
+ if (G_UNLIKELY (!GST_V4L2_IS_ACTIVE (self->v4l2capture))) {
+ GstVideoInfo info;
+ GstVideoCodecState *output_state;
+ GstBuffer *codec_data;
+
+ GST_DEBUG_OBJECT (self, "Sending header");
+
+ codec_data = self->input_state->codec_data;
+
+ /* We are running in byte-stream mode, so we don't know the headers, but
+ * we need to send something, otherwise the decoder will refuse to
+ * intialize.
+ */
+ if (codec_data) {
+ gst_buffer_ref (codec_data);
+ } else {
+ codec_data = frame->input_buffer;
+ frame->input_buffer = NULL;
+ }
+
+ GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
+ gst_v4l2_object_unlock_stop (self->v4l2output);
+ ret =
+ gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL (self->v4l2output->
+ pool), codec_data);
+ gst_v4l2_object_unlock (self->v4l2output);
+ GST_VIDEO_DECODER_STREAM_LOCK (decoder);
+
+ gst_buffer_unref (codec_data);
+
+ if (!gst_v4l2_object_setup_format (self->v4l2capture, &info, &self->align))
+ goto not_negotiated;
+
+ output_state = gst_video_decoder_set_output_state (decoder,
+ info.finfo->format, info.width, info.height, self->input_state);
+
+ /* Copy the rest of the information, there might be more in the future */
+ output_state->info.interlace_mode = info.interlace_mode;
+ gst_video_codec_state_unref (output_state);
+
+ if (!gst_video_decoder_negotiate (decoder)) {
+ if (GST_PAD_IS_FLUSHING (decoder->srcpad))
+ goto flushing;
+ else
+ goto not_negotiated;
+ }
+ }
+
+ if (g_atomic_int_get (&self->processing) == FALSE) {
+ /* It possible that the processing thread stopped due to an error */
+ if (self->output_flow != GST_FLOW_OK) {
+ GST_DEBUG_OBJECT (self, "Processing loop stopped with error, leaving");
+ ret = self->output_flow;
+ goto drop;
+ }
+
+ GST_DEBUG_OBJECT (self, "Starting decoding thread");
+
+ /* Enable processing input */
+ gst_v4l2_object_unlock_stop (self->v4l2output);
+
+ /* Start the processing task, when it quits, the task will disable input
+ * processing to unlock input if draining, or prevent potential block */
+ g_atomic_int_set (&self->processing, TRUE);
+ gst_pad_start_task (decoder->srcpad,
+ (GstTaskFunction) gst_v4l2_video_dec_loop, self, NULL);
+ }
+
+ if (frame->input_buffer) {
+ GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
+ ret =
+ gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL (self->v4l2output->
+ pool), frame->input_buffer);
+ GST_VIDEO_DECODER_STREAM_LOCK (decoder);
+
+ if (ret == GST_FLOW_FLUSHING) {
+ if (g_atomic_int_get (&self->processing) == FALSE)
+ ret = self->output_flow;
+ }
+
+ /* No need to keep input arround */
+ gst_buffer_replace (&frame->input_buffer, NULL);
+ }
+
+ gst_video_codec_frame_unref (frame);
+ return ret;
+
+ /* ERRORS */
+not_negotiated:
+ {
+ GST_ERROR_OBJECT (self, "not negotiated");
+ ret = GST_FLOW_NOT_NEGOTIATED;
+ goto drop;
+ }
+flushing:
+ {
+ ret = GST_FLOW_FLUSHING;
+ goto drop;
+ }
+drop:
+ {
+ gst_video_decoder_drop_frame (decoder, frame);
+ return ret;
+ }
+}
+
+static gboolean
+gst_v4l2_video_dec_decide_allocation (GstVideoDecoder * decoder,
+ GstQuery * query)
+{
+ GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
+ gboolean ret = FALSE;
+
+ if (gst_v4l2_object_decide_allocation (self->v4l2capture, query))
+ ret = GST_VIDEO_DECODER_CLASS (parent_class)->decide_allocation (decoder,
+ query);
+
+ return ret;
+}
+
+static gboolean
+gst_v4l2_video_dec_src_query (GstVideoDecoder * decoder, GstQuery * query)
+{
+ gboolean ret = TRUE;
+ GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
+
+ switch (GST_QUERY_TYPE (query)) {
+ case GST_QUERY_CAPS:{
+ GstCaps *filter, *result = NULL;
+ gst_query_parse_caps (query, &filter);
+
+ if (self->probed_srccaps)
+ result = gst_caps_ref (self->probed_srccaps);
+ else
+ result = gst_v4l2_object_get_raw_caps ();
+
+ 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_DECODER_CLASS (parent_class)->src_query (decoder, query);
+ break;
+ }
+
+ return ret;
+}
+
+static gboolean
+gst_v4l2_video_dec_sink_query (GstVideoDecoder * decoder, GstQuery * query)
+{
+ gboolean ret = TRUE;
+ GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
+
+ switch (GST_QUERY_TYPE (query)) {
+ case GST_QUERY_CAPS:{
+ GstCaps *filter, *result = NULL;
+ gst_query_parse_caps (query, &filter);
+
+ if (self->probed_sinkcaps)
+ result = gst_caps_ref (self->probed_sinkcaps);
+ else
+ result = gst_v4l2_object_get_codec_caps ();
+
+ 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_DECODER_CLASS (parent_class)->sink_query (decoder, query);
+ break;
+ }
+
+ return ret;
+}
+
+static gboolean
+gst_v4l2_video_dec_sink_event (GstVideoDecoder * decoder, GstEvent * event)
+{
+ GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_FLUSH_START:
+ gst_v4l2_object_unlock (self->v4l2output);
+ gst_v4l2_object_unlock (self->v4l2capture);
+ default:
+ break;
+ }
+
+ return GST_VIDEO_DECODER_CLASS (parent_class)->sink_event (decoder, event);
+}
+
+static GstStateChangeReturn
+gst_v4l2_video_dec_change_state (GstElement * element,
+ GstStateChange transition)
+{
+ GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (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_dec_dispose (GObject * object)
+{
+ GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (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_dec_finalize (GObject * object)
+{
+ GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (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_dec_init (GstV4l2VideoDec * self)
+{
+ GstVideoDecoder *decoder = (GstVideoDecoder *) self;
+
+ gst_video_decoder_set_packetized (decoder, TRUE);
+
+ self->v4l2output = gst_v4l2_object_new (GST_ELEMENT (self),
+ V4L2_BUF_TYPE_VIDEO_OUTPUT, DEFAULT_PROP_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),
+ V4L2_BUF_TYPE_VIDEO_CAPTURE, DEFAULT_PROP_DEVICE,
+ gst_v4l2_get_input, gst_v4l2_set_input, NULL);
+ self->v4l2capture->no_initial_format = TRUE;
+ self->v4l2output->keep_aspect = FALSE;
+
+ g_object_set (self, "device", DEFAULT_PROP_DEVICE, NULL);
+}
+
+static void
+gst_v4l2_video_dec_class_init (GstV4l2VideoDecClass * klass)
+{
+ GstElementClass *element_class;
+ GObjectClass *gobject_class;
+ GstVideoDecoderClass *video_decoder_class;
+
+ element_class = (GstElementClass *) klass;
+ gobject_class = (GObjectClass *) klass;
+ video_decoder_class = (GstVideoDecoderClass *) klass;
+
+ gst_element_class_add_pad_template (element_class,
+ gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
+ gst_v4l2_object_get_codec_caps ()));
+
+ gst_element_class_add_pad_template (element_class,
+ gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
+ gst_v4l2_object_get_raw_caps ()));
+
+ gst_element_class_set_static_metadata (element_class,
+ "V4L2 Video Decoder",
+ "Codec/Decoder/Video",
+ "Decode video streams via V4L2 API",
+ "Nicolas Dufresne <nicolas.dufresne@collabora.co.uk>");
+
+ gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_dispose);
+ gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_finalize);
+ gobject_class->set_property =
+ GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_set_property);
+ gobject_class->get_property =
+ GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_get_property);
+
+ video_decoder_class->open = GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_open);
+ video_decoder_class->close = GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_close);
+ video_decoder_class->start = GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_start);
+ video_decoder_class->stop = GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_stop);
+ video_decoder_class->finish = GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_finish);
+ video_decoder_class->flush = GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_flush);
+ video_decoder_class->set_format =
+ GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_set_format);
+ video_decoder_class->negotiate =
+ GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_negotiate);
+ video_decoder_class->decide_allocation =
+ GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_decide_allocation);
+ /* FIXME propose_allocation or not ? */
+ video_decoder_class->handle_frame =
+ GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_handle_frame);
+ video_decoder_class->sink_query =
+ GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_sink_query);
+ video_decoder_class->src_query =
+ GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_src_query);
+ video_decoder_class->sink_event =
+ GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_sink_event);
+
+ element_class->change_state =
+ GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_change_state);
+
+
+ gst_v4l2_object_install_properties_helper (gobject_class,
+ DEFAULT_PROP_DEVICE);
+
+ /**
+ * GstV4l2VideoDec:capture-io-mode
+ *
+ * Capture IO Mode
+ */
+ g_object_class_install_property (gobject_class, PROP_IO_MODE,
+ g_param_spec_enum ("capture-io-mode", "Capture IO mode",
+ "Capture I/O mode",
+ GST_TYPE_V4L2_IO_MODE, GST_V4L2_IO_AUTO,
+ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+ GST_DEBUG_CATEGORY_INIT (gst_v4l2_video_dec_debug, "v4l2videodec", 0,
+ "V4L2 Video Decoder");
+}
projects / platform / upstream / gstreamer.git / commitdiff