mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-04 23:46:43 +00:00
23bb84c868
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/725>
165 lines
5.2 KiB
C
165 lines
5.2 KiB
C
/* VP8
|
|
* Copyright (C) 2006 David Schleef <ds@schleef.org>
|
|
* Copyright (C) 2008,2009,2010 Entropy Wave Inc
|
|
* Copyright (C) 2010-2012 Sebastian Dröge <sebastian.droege@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.
|
|
*
|
|
*/
|
|
/**
|
|
* SECTION:element-vp8dec
|
|
* @title: vp8dec
|
|
* @see_also: vp8enc, matroskademux
|
|
*
|
|
* This element decodes VP8 streams into raw video.
|
|
* [VP8](http://www.webmproject.org) is a royalty-free video codec maintained by
|
|
* [Google](http://www.google.com/). It's the successor of On2 VP3, which was
|
|
* the base of the Theora video codec.
|
|
*
|
|
* ## Example pipeline
|
|
* |[
|
|
* gst-launch-1.0 -v filesrc location=videotestsrc.webm ! matroskademux ! vp8dec ! videoconvert ! videoscale ! autovideosink
|
|
* ]| This example pipeline will decode a WebM stream and decodes the VP8 video.
|
|
*
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#ifdef HAVE_VP8_DECODER
|
|
|
|
#include <string.h>
|
|
|
|
#include "gstvp8dec.h"
|
|
#include "gstvp8utils.h"
|
|
|
|
#include <gst/video/gstvideometa.h>
|
|
#include <gst/video/gstvideopool.h>
|
|
|
|
GST_DEBUG_CATEGORY_STATIC (gst_vp8dec_debug);
|
|
#define GST_CAT_DEFAULT gst_vp8dec_debug
|
|
|
|
#define VP8_DECODER_VIDEO_TAG "VP8 video"
|
|
|
|
static void gst_vp8_dec_set_default_format (GstVPXDec * dec, GstVideoFormat fmt,
|
|
int width, int height);
|
|
static void gst_vp8_dec_handle_resolution_change (GstVPXDec * dec,
|
|
vpx_image_t * img, GstVideoFormat fmt);
|
|
static gboolean gst_vp8_dec_get_needs_sync_point (GstVPXDec * dec);
|
|
|
|
static GstStaticPadTemplate gst_vp8_dec_sink_template =
|
|
GST_STATIC_PAD_TEMPLATE ("sink",
|
|
GST_PAD_SINK,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS ("video/x-vp8")
|
|
);
|
|
|
|
static GstStaticPadTemplate gst_vp8_dec_src_template =
|
|
GST_STATIC_PAD_TEMPLATE ("src",
|
|
GST_PAD_SRC,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("I420"))
|
|
);
|
|
|
|
#define parent_class gst_vp8_dec_parent_class
|
|
G_DEFINE_TYPE (GstVP8Dec, gst_vp8_dec, GST_TYPE_VPX_DEC);
|
|
|
|
static void
|
|
gst_vp8_dec_class_init (GstVP8DecClass * klass)
|
|
{
|
|
GstElementClass *element_class;
|
|
GstVPXDecClass *vpx_class;
|
|
|
|
element_class = GST_ELEMENT_CLASS (klass);
|
|
vpx_class = GST_VPX_DEC_CLASS (klass);
|
|
|
|
gst_element_class_add_static_pad_template (element_class,
|
|
&gst_vp8_dec_sink_template);
|
|
gst_element_class_add_static_pad_template (element_class,
|
|
&gst_vp8_dec_src_template);
|
|
|
|
gst_element_class_set_static_metadata (element_class,
|
|
"On2 VP8 Decoder",
|
|
"Codec/Decoder/Video",
|
|
"Decode VP8 video streams", "David Schleef <ds@entropywave.com>, "
|
|
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
|
|
|
|
vpx_class->video_codec_tag = VP8_DECODER_VIDEO_TAG;
|
|
vpx_class->codec_algo = &vpx_codec_vp8_dx_algo;
|
|
vpx_class->set_default_format =
|
|
GST_DEBUG_FUNCPTR (gst_vp8_dec_set_default_format);
|
|
vpx_class->handle_resolution_change =
|
|
GST_DEBUG_FUNCPTR (gst_vp8_dec_handle_resolution_change);
|
|
vpx_class->get_needs_sync_point =
|
|
GST_DEBUG_FUNCPTR (gst_vp8_dec_get_needs_sync_point);
|
|
|
|
GST_DEBUG_CATEGORY_INIT (gst_vp8dec_debug, "vp8dec", 0, "VP8 Decoder");
|
|
}
|
|
|
|
static void
|
|
gst_vp8_dec_init (GstVP8Dec * gst_vp8_dec)
|
|
{
|
|
GST_DEBUG_OBJECT (gst_vp8_dec, "gst_vp8_dec_init");
|
|
}
|
|
|
|
static void
|
|
gst_vp8_dec_set_default_format (GstVPXDec * dec, GstVideoFormat fmt, int width,
|
|
int height)
|
|
{
|
|
GstVPXDecClass *vpxclass = GST_VPX_DEC_GET_CLASS (dec);
|
|
g_assert (dec->output_state == NULL);
|
|
dec->output_state =
|
|
gst_video_decoder_set_output_state (GST_VIDEO_DECODER (dec),
|
|
GST_VIDEO_FORMAT_I420, width, height, dec->input_state);
|
|
gst_video_decoder_negotiate (GST_VIDEO_DECODER (dec));
|
|
vpxclass->send_tags (dec);
|
|
}
|
|
|
|
static void
|
|
gst_vp8_dec_handle_resolution_change (GstVPXDec * dec, vpx_image_t * img,
|
|
GstVideoFormat fmt)
|
|
{
|
|
GstVideoInfo *info;
|
|
GstVideoCodecState *new_output_state;
|
|
|
|
info = &dec->output_state->info;
|
|
if (GST_VIDEO_INFO_WIDTH (info) != img->d_w
|
|
|| GST_VIDEO_INFO_HEIGHT (info) != img->d_h) {
|
|
GST_DEBUG_OBJECT (dec,
|
|
"Changed output resolution was %d x %d now is got %u x %u (display %u x %u)",
|
|
GST_VIDEO_INFO_WIDTH (info), GST_VIDEO_INFO_HEIGHT (info), img->w,
|
|
img->h, img->d_w, img->d_h);
|
|
|
|
new_output_state =
|
|
gst_video_decoder_set_output_state (GST_VIDEO_DECODER (dec),
|
|
GST_VIDEO_FORMAT_I420, img->d_w, img->d_h, dec->output_state);
|
|
if (dec->output_state) {
|
|
gst_video_codec_state_unref (dec->output_state);
|
|
}
|
|
dec->output_state = new_output_state;
|
|
/* No need to call negotiate() here, it will be automatically called
|
|
* by allocate_output_frame()*/
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_vp8_dec_get_needs_sync_point (GstVPXDec * dec)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
#endif /* HAVE_VP8_DECODER */
|