gstreamer/ext/vpx/gstvp9dec.c

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/* VP9
* Copyright (C) 2006 David Schleef <ds@schleef.org>
* Copyright (C) 2008,2009,2010 Entropy Wave Inc
* Copyright (C) 2010-2013 Sebastian Dröge <slomo@circular-chaos.org>
*
* 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-vp9dec
* @see_also: vp9enc, matroskademux
*
* This element decodes VP9 streams into raw video.
* <ulink url="http://www.webmproject.org">VP9</ulink> is a royalty-free
* video codec maintained by <ulink url="http://www.google.com/">Google
* </ulink>. It's the successor of On2 VP3, which was the base of the
* Theora video codec.
*
* <refsect2>
* <title>Example pipeline</title>
* |[
* gst-launch-1.0 -v filesrc location=videotestsrc.webm ! matroskademux ! vp9dec ! videoconvert ! videoscale ! autovideosink
* ]| This example pipeline will decode a WebM stream and decodes the VP9 video.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_VP9_DECODER
#include <string.h>
#include "gstvp8utils.h"
#include "gstvp9dec.h"
#include <gst/video/gstvideometa.h>
#include <gst/video/gstvideopool.h>
GST_DEBUG_CATEGORY_STATIC (gst_vp9dec_debug);
#define GST_CAT_DEFAULT gst_vp9dec_debug
#define VP9_DECODER_VIDEO_TAG "VP9 video"
static void gst_vp9_dec_set_stream_info (GstVPXDec * dec,
vpx_codec_stream_info_t * stream_info);
static gboolean gst_vp9_dec_get_valid_format (GstVPXDec * dec,
vpx_image_t * img, GstVideoFormat * fmt);
static void gst_vp9_dec_handle_resolution_change (GstVPXDec * dec,
vpx_image_t * img, GstVideoFormat fmt);
static GstStaticPadTemplate gst_vp9_dec_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-vp9")
);
static GstStaticPadTemplate gst_vp9_dec_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ I420, YV12, Y42B, Y444 }"))
);
#define parent_class gst_vp9_dec_parent_class
G_DEFINE_TYPE (GstVP9Dec, gst_vp9_dec, GST_TYPE_VPX_DEC);
static void
gst_vp9_dec_class_init (GstVP9DecClass * 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_vp9_dec_src_template);
gst_element_class_add_static_pad_template (element_class,
&gst_vp9_dec_sink_template);
gst_element_class_set_static_metadata (element_class,
"On2 VP9 Decoder",
"Codec/Decoder/Video",
"Decode VP9 video streams", "David Schleef <ds@entropywave.com>, "
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
vpx_class->video_codec_tag = VP9_DECODER_VIDEO_TAG;
vpx_class->codec_algo = &vpx_codec_vp9_dx_algo;
vpx_class->set_stream_info = GST_DEBUG_FUNCPTR (gst_vp9_dec_set_stream_info);
vpx_class->get_frame_format =
GST_DEBUG_FUNCPTR (gst_vp9_dec_get_valid_format);
vpx_class->handle_resolution_change =
GST_DEBUG_FUNCPTR (gst_vp9_dec_handle_resolution_change);
GST_DEBUG_CATEGORY_INIT (gst_vp9dec_debug, "vp9dec", 0, "VP9 Decoder");
}
static void
gst_vp9_dec_init (GstVP9Dec * gst_vp9_dec)
{
GST_DEBUG_OBJECT (gst_vp9_dec, "gst_vp9_dec_init");
}
static void
gst_vp9_dec_set_stream_info (GstVPXDec * dec,
vpx_codec_stream_info_t * stream_info)
{
/* FIXME: peek_stream_info() does not return valid values, take input caps */
stream_info->w = dec->input_state->info.width;
stream_info->h = dec->input_state->info.height;
return;
}
static gboolean
gst_vp9_dec_get_valid_format (GstVPXDec * dec, vpx_image_t * img,
GstVideoFormat * fmt)
{
switch (img->fmt) {
case VPX_IMG_FMT_I420:
*fmt = GST_VIDEO_FORMAT_I420;
return TRUE;
case VPX_IMG_FMT_YV12:
*fmt = GST_VIDEO_FORMAT_YV12;
return TRUE;
case VPX_IMG_FMT_I422:
*fmt = GST_VIDEO_FORMAT_Y42B;
return TRUE;
case VPX_IMG_FMT_I444:
*fmt = GST_VIDEO_FORMAT_Y444;
return TRUE;
default:
return FALSE;
}
}
static void
gst_vp9_dec_handle_resolution_change (GstVPXDec * dec, vpx_image_t * img,
GstVideoFormat fmt)
{
GstVPXDecClass *vpxclass = GST_VPX_DEC_GET_CLASS (dec);
if (!dec->output_state || dec->output_state->info.finfo->format != fmt ||
dec->output_state->info.width != img->d_w ||
dec->output_state->info.height != img->d_h) {
gboolean send_tags = !dec->output_state;
if (dec->output_state)
gst_video_codec_state_unref (dec->output_state);
dec->output_state =
gst_video_decoder_set_output_state (GST_VIDEO_DECODER (dec),
fmt, img->d_w, img->d_h, dec->input_state);
gst_video_decoder_negotiate (GST_VIDEO_DECODER (dec));
if (send_tags)
vpxclass->send_tags (dec);
}
}
#endif /* HAVE_VP9_DECODER */