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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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282 lines
7.1 KiB
C
282 lines
7.1 KiB
C
/* GStreamer
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* Copyright (C) 2006 David Schleef <ds@schleef.org>
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, 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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/**
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* SECTION:gstbasevideocodec
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* @short_description: Base class for video codecs
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* @see_also: #GstBaseVideoDecoder , #GstBaseVideoEncoder
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*/
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/* FIXME 0.11: suppress warnings for deprecated API such as GStaticRecMutex
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* with newer GLib versions (>= 2.31.0) */
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#define GLIB_DISABLE_DEPRECATION_WARNINGS
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#include "gstbasevideocodec.h"
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#include <string.h>
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#include <math.h>
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GST_DEBUG_CATEGORY (basevideocodec_debug);
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#define GST_CAT_DEFAULT basevideocodec_debug
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/* GstBaseVideoCodec signals and args */
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enum
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{
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LAST_SIGNAL
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};
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enum
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{
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ARG_0
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};
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static void gst_base_video_codec_finalize (GObject * object);
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static GstStateChangeReturn gst_base_video_codec_change_state (GstElement *
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element, GstStateChange transition);
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GType
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gst_video_frame_get_type (void)
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{
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static volatile gsize type = 0;
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if (g_once_init_enter (&type)) {
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GType _type;
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_type = g_boxed_type_register_static ("GstVideoFrame",
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(GBoxedCopyFunc) gst_video_frame_ref,
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(GBoxedFreeFunc) gst_video_frame_unref);
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g_once_init_leave (&type, _type);
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}
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return (GType) type;
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}
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GST_BOILERPLATE (GstBaseVideoCodec, gst_base_video_codec, GstElement,
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GST_TYPE_ELEMENT);
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static void
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gst_base_video_codec_base_init (gpointer g_class)
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{
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GST_DEBUG_CATEGORY_INIT (basevideocodec_debug, "basevideocodec", 0,
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"Base Video Codec");
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}
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static void
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gst_base_video_codec_class_init (GstBaseVideoCodecClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *element_class;
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gobject_class = G_OBJECT_CLASS (klass);
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element_class = GST_ELEMENT_CLASS (klass);
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gobject_class->finalize = gst_base_video_codec_finalize;
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element_class->change_state = gst_base_video_codec_change_state;
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}
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static void
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gst_base_video_codec_init (GstBaseVideoCodec * base_video_codec,
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GstBaseVideoCodecClass * klass)
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{
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GstPadTemplate *pad_template;
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GST_DEBUG_OBJECT (base_video_codec, "gst_base_video_codec_init");
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pad_template =
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gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "sink");
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g_return_if_fail (pad_template != NULL);
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base_video_codec->sinkpad = gst_pad_new_from_template (pad_template, "sink");
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gst_element_add_pad (GST_ELEMENT (base_video_codec),
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base_video_codec->sinkpad);
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pad_template =
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gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "src");
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g_return_if_fail (pad_template != NULL);
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base_video_codec->srcpad = gst_pad_new_from_template (pad_template, "src");
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gst_element_add_pad (GST_ELEMENT (base_video_codec),
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base_video_codec->srcpad);
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gst_segment_init (&base_video_codec->segment, GST_FORMAT_TIME);
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g_static_rec_mutex_init (&base_video_codec->stream_lock);
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}
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static void
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gst_base_video_codec_reset (GstBaseVideoCodec * base_video_codec)
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{
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GList *g;
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GST_DEBUG_OBJECT (base_video_codec, "reset");
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GST_BASE_VIDEO_CODEC_STREAM_LOCK (base_video_codec);
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for (g = base_video_codec->frames; g; g = g_list_next (g)) {
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gst_video_frame_unref ((GstVideoFrame *) g->data);
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}
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g_list_free (base_video_codec->frames);
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base_video_codec->frames = NULL;
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base_video_codec->bytes = 0;
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base_video_codec->time = 0;
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gst_buffer_replace (&base_video_codec->state.codec_data, NULL);
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gst_caps_replace (&base_video_codec->state.caps, NULL);
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memset (&base_video_codec->state, 0, sizeof (GstVideoState));
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base_video_codec->state.format = GST_VIDEO_FORMAT_UNKNOWN;
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GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (base_video_codec);
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}
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static void
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gst_base_video_codec_finalize (GObject * object)
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{
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GstBaseVideoCodec *base_video_codec = GST_BASE_VIDEO_CODEC (object);
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g_static_rec_mutex_free (&base_video_codec->stream_lock);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static GstStateChangeReturn
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gst_base_video_codec_change_state (GstElement * element,
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GstStateChange transition)
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{
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GstBaseVideoCodec *base_video_codec = GST_BASE_VIDEO_CODEC (element);
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GstStateChangeReturn ret;
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switch (transition) {
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case GST_STATE_CHANGE_NULL_TO_READY:
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break;
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case GST_STATE_CHANGE_READY_TO_PAUSED:
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gst_base_video_codec_reset (base_video_codec);
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break;
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case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
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break;
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default:
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break;
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}
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ret = parent_class->change_state (element, transition);
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switch (transition) {
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case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
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break;
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case GST_STATE_CHANGE_PAUSED_TO_READY:
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gst_base_video_codec_reset (base_video_codec);
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break;
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case GST_STATE_CHANGE_READY_TO_NULL:
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break;
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default:
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break;
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}
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return ret;
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}
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/**
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* gst_base_video_codec_new_frame:
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* @base_video_codec: a #GstBaseVideoCodec
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*
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* Create a new blank #GstVideoFrame.
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*
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* Returns: (transfer full): a new #GstVideoFrame
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*/
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GstVideoFrame *
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gst_base_video_codec_new_frame (GstBaseVideoCodec * base_video_codec)
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{
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GstVideoFrame *frame;
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frame = g_slice_new0 (GstVideoFrame);
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frame->ref_count = 1;
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GST_BASE_VIDEO_CODEC_STREAM_LOCK (base_video_codec);
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frame->system_frame_number = base_video_codec->system_frame_number;
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base_video_codec->system_frame_number++;
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GST_BASE_VIDEO_CODEC_STREAM_UNLOCK (base_video_codec);
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GST_LOG_OBJECT (base_video_codec, "Created new frame %p (sfn:%d)",
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frame, frame->system_frame_number);
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return frame;
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}
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static void
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_gst_video_frame_free (GstVideoFrame * frame)
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{
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g_return_if_fail (frame != NULL);
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if (frame->sink_buffer) {
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gst_buffer_unref (frame->sink_buffer);
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}
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if (frame->src_buffer) {
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gst_buffer_unref (frame->src_buffer);
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}
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g_list_foreach (frame->events, (GFunc) gst_event_unref, NULL);
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g_list_free (frame->events);
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if (frame->coder_hook_destroy_notify && frame->coder_hook)
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frame->coder_hook_destroy_notify (frame->coder_hook);
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g_slice_free (GstVideoFrame, frame);
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}
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/**
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* gst_video_frame_ref:
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* @frame: a #GstVideoFrame
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*
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* Increases the refcount of the given frame by one.
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*
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* Returns: @buf
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*/
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GstVideoFrame *
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gst_video_frame_ref (GstVideoFrame * frame)
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{
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g_return_val_if_fail (frame != NULL, NULL);
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g_atomic_int_inc (&frame->ref_count);
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return frame;
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}
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/**
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* gst_video_frame_unref:
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* @frame: a #GstVideoFrame
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*
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* Decreases the refcount of the frame. If the refcount reaches 0, the frame
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* will be freed.
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*/
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void
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gst_video_frame_unref (GstVideoFrame * frame)
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{
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g_return_if_fail (frame != NULL);
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g_return_if_fail (frame->ref_count > 0);
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if (g_atomic_int_dec_and_test (&frame->ref_count)) {
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_gst_video_frame_free (frame);
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}
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}
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