gstreamer/gst/vaapidecode/gstvaapidecode.c

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/*
* gstvaapidecode.c - VA-API video decoder
*
* gstreamer-vaapi (C) 2010 Splitted-Desktop Systems
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* SECTION:gstvaapidecode
* @short_description: A VA-API based video decoder
*
* vaapidecode decodes from raw bitstreams to surfaces suitable for
* the vaapisink element.
*/
#include "config.h"
#include "gstvaapidecode.h"
#include <gst/vaapi/gstvaapivideosink.h>
#include <gst/vaapi/gstvaapivideobuffer.h>
#include <gst/vaapi/gstvaapidecoder_ffmpeg.h>
#define GST_PLUGIN_NAME "vaapidecode"
#define GST_PLUGIN_DESC "A VA-API based video decoder"
GST_DEBUG_CATEGORY_STATIC(gst_debug_vaapidecode);
#define GST_CAT_DEFAULT gst_debug_vaapidecode
/* ElementFactory information */
static const GstElementDetails gst_vaapidecode_details =
GST_ELEMENT_DETAILS(
"Video decode",
"Codec/Decoder/Video",
GST_PLUGIN_DESC,
"Gwenole Beauchesne <gbeauchesne@splitted-desktop.com>");
/* Default templates */
#define GST_CAPS_CODEC(CODEC) \
CODEC ", " \
"width = (int) [ 1, MAX ], " \
"height = (int) [ 1, MAX ]; "
static const char gst_vaapidecode_sink_caps_str[] =
GST_CAPS_CODEC("video/mpeg, mpegversion=2")
GST_CAPS_CODEC("video/mpeg, mpegversion=4")
GST_CAPS_CODEC("video/x-h263")
GST_CAPS_CODEC("video/x-h264")
GST_CAPS_CODEC("video/x-vc1")
;
static const char gst_vaapidecode_src_caps_str[] =
"video/x-vaapi-surface, "
"width = (int) [ 1, MAX ], "
"height = (int) [ 1, MAX ]; ";
static GstStaticPadTemplate gst_vaapidecode_sink_factory =
GST_STATIC_PAD_TEMPLATE(
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS(gst_vaapidecode_sink_caps_str));
static GstStaticPadTemplate gst_vaapidecode_src_factory =
GST_STATIC_PAD_TEMPLATE(
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS(gst_vaapidecode_src_caps_str));
GST_BOILERPLATE(
GstVaapiDecode,
gst_vaapidecode,
GstElement,
GST_TYPE_ELEMENT);
enum {
PROP_0,
PROP_USE_FFMPEG,
};
static GstFlowReturn
gst_vaapidecode_step(GstVaapiDecode *decode)
{
GstVaapiSurfaceProxy *proxy;
GstVaapiDecoderStatus status;
GstBuffer *buffer;
GstFlowReturn ret;
for (;;) {
proxy = gst_vaapi_decoder_get_surface(decode->decoder, &status);
if (!proxy) {
if (status != GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA)
goto error_decode;
/* More data is needed */
break;
}
buffer = NULL;
ret = gst_pad_alloc_buffer(
decode->srcpad,
0, 0,
GST_PAD_CAPS(decode->srcpad),
&buffer
);
if (ret != GST_FLOW_OK || !buffer)
goto error_create_buffer;
GST_BUFFER_TIMESTAMP(buffer) = GST_VAAPI_SURFACE_PROXY_TIMESTAMP(proxy);
gst_vaapi_video_buffer_set_surface_proxy(
GST_VAAPI_VIDEO_BUFFER(buffer),
proxy
);
ret = gst_pad_push(decode->srcpad, buffer);
if (ret != GST_FLOW_OK)
goto error_commit_buffer;
g_object_unref(proxy);
}
return GST_FLOW_OK;
/* ERRORS */
error_decode:
{
GST_DEBUG("decode error %d", status);
return GST_FLOW_UNEXPECTED;
}
error_create_buffer:
{
const GstVaapiID surface_id =
gst_vaapi_surface_get_id(GST_VAAPI_SURFACE_PROXY_SURFACE(proxy));
GST_DEBUG("video sink failed to create video buffer for proxy'ed "
"surface %" GST_VAAPI_ID_FORMAT " (error %d)",
GST_VAAPI_ID_ARGS(surface_id), ret);
g_object_unref(proxy);
return GST_FLOW_UNEXPECTED;
}
error_commit_buffer:
{
GST_DEBUG("video sink rejected the video buffer (error %d)", ret);
g_object_unref(proxy);
return GST_FLOW_UNEXPECTED;
}
}
static gboolean
gst_vaapidecode_create(GstVaapiDecode *decode)
{
GstVaapiVideoSink *sink;
GstVaapiDisplay *display;
GstVaapiCodec codec;
/* Look for a downstream vaapisink */
sink = gst_vaapi_video_sink_lookup(GST_ELEMENT(decode));
if (!sink)
return FALSE;
display = gst_vaapi_video_sink_get_display(sink);
if (!display)
return FALSE;
decode->display = g_object_ref(display);
codec = gst_vaapi_profile_get_codec(decode->profile);
if (!codec)
return FALSE;
if (decode->use_ffmpeg)
decode->decoder =
gst_vaapi_decoder_ffmpeg_new(display, codec, decode->codec_data);
return decode->decoder != NULL;
}
static void
gst_vaapidecode_destroy(GstVaapiDecode *decode)
{
if (decode->decoder) {
gst_vaapi_decoder_put_buffer(decode->decoder, NULL);
g_object_unref(decode->decoder);
decode->decoder = NULL;
}
if (decode->codec_data) {
gst_buffer_unref(decode->codec_data);
decode->codec_data = NULL;
}
if (decode->display) {
g_object_unref(decode->display);
decode->display = NULL;
}
}
static void gst_vaapidecode_base_init(gpointer klass)
{
GstElementClass * const element_class = GST_ELEMENT_CLASS(klass);
gst_element_class_set_details(element_class, &gst_vaapidecode_details);
/* sink pad */
gst_element_class_add_pad_template(
element_class,
gst_static_pad_template_get(&gst_vaapidecode_sink_factory)
);
/* src pad */
gst_element_class_add_pad_template(
element_class,
gst_static_pad_template_get(&gst_vaapidecode_src_factory)
);
}
static void
gst_vaapidecode_finalize(GObject *object)
{
gst_vaapidecode_destroy(GST_VAAPIDECODE(object));
G_OBJECT_CLASS(parent_class)->finalize(object);
}
static void
gst_vaapidecode_set_property(
GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec
)
{
GstVaapiDecode * const decode = GST_VAAPIDECODE(object);
switch (prop_id) {
case PROP_USE_FFMPEG:
decode->use_ffmpeg = g_value_get_boolean(value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void
gst_vaapidecode_get_property(
GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec
)
{
GstVaapiDecode * const decode = GST_VAAPIDECODE(object);
switch (prop_id) {
case PROP_USE_FFMPEG:
g_value_set_boolean(value, decode->use_ffmpeg);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_vaapidecode_change_state(GstElement *element, GstStateChange transition)
{
GstVaapiDecode * const decode = GST_VAAPIDECODE(element);
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS(parent_class)->change_state(element, transition);
if (ret != GST_STATE_CHANGE_SUCCESS)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
break;
default:
break;
}
return GST_STATE_CHANGE_SUCCESS;
}
static void
gst_vaapidecode_class_init(GstVaapiDecodeClass *klass)
{
GObjectClass * const object_class = G_OBJECT_CLASS(klass);
GstElementClass * const element_class = GST_ELEMENT_CLASS(klass);
object_class->finalize = gst_vaapidecode_finalize;
object_class->set_property = gst_vaapidecode_set_property;
object_class->get_property = gst_vaapidecode_get_property;
element_class->change_state = gst_vaapidecode_change_state;
g_object_class_install_property
(object_class,
PROP_USE_FFMPEG,
g_param_spec_boolean("use-ffmpeg",
"Use FFmpeg/VAAPI for decoding",
"Uses FFmpeg/VAAPI for decoding",
TRUE,
G_PARAM_READWRITE));
}
static gboolean
gst_vaapidecode_set_caps(GstPad *pad, GstCaps *caps)
{
GstVaapiDecode * const decode = GST_VAAPIDECODE(GST_OBJECT_PARENT(pad));
GstPad *other_pad;
GstCaps *other_caps = NULL;
GstStructure *structure;
const GValue *v_width, *v_height, *v_framerate, *v_par, *v_codec_data;
if (pad == decode->sinkpad) {
other_pad = decode->srcpad;
other_caps = gst_caps_from_string(gst_vaapidecode_src_caps_str);
}
else {
other_pad = decode->sinkpad;
other_caps = gst_caps_from_string(gst_vaapidecode_sink_caps_str);
}
/* Negotiation succeeded, so now configure ourselves */
structure = gst_caps_get_structure(caps, 0);
v_width = gst_structure_get_value(structure, "width");
v_height = gst_structure_get_value(structure, "height");
v_framerate = gst_structure_get_value(structure, "framerate");
v_par = gst_structure_get_value(structure, "pixel-aspect-ratio");
v_codec_data = gst_structure_get_value(structure, "codec_data");
if (pad == decode->sinkpad) {
decode->profile = gst_vaapi_profile_from_caps(caps);
if (v_codec_data)
decode->codec_data =
gst_buffer_ref(gst_value_get_buffer(v_codec_data));
}
structure = gst_caps_get_structure(other_caps, 0);
gst_structure_set_value(structure, "width", v_width);
gst_structure_set_value(structure, "height", v_height);
if (v_framerate)
gst_structure_set_value(structure, "framerate", v_framerate);
if (v_par)
gst_structure_set_value(structure, "pixel-aspect-ratio", v_par);
return gst_pad_set_caps(other_pad, other_caps);
}
static GstFlowReturn
gst_vaapidecode_chain(GstPad *pad, GstBuffer *buf)
{
GstVaapiDecode * const decode = GST_VAAPIDECODE(GST_OBJECT_PARENT(pad));
if (!decode->decoder) {
if (!gst_vaapidecode_create(decode))
goto error_create_decoder;
}
if (!gst_vaapi_decoder_put_buffer(decode->decoder, buf))
goto error_push_buffer;
gst_buffer_unref(buf);
return gst_vaapidecode_step(decode);
/* ERRORS */
error_create_decoder:
{
GST_DEBUG("failed to create decoder");
gst_buffer_unref(buf);
return GST_FLOW_UNEXPECTED;
}
error_push_buffer:
{
GST_DEBUG("failed to push input buffer to decoder");
gst_buffer_unref(buf);
return GST_FLOW_UNEXPECTED;
}
}
static gboolean
gst_vaapidecode_sink_event(GstPad *pad, GstEvent *event)
{
GstVaapiDecode * const decode = GST_VAAPIDECODE(GST_OBJECT_PARENT(pad));
GST_DEBUG("handle sink event '%s'", GST_EVENT_TYPE_NAME(event));
/* Propagate event downstream */
return gst_pad_push_event(decode->srcpad, event);
}
static gboolean
gst_vaapidecode_src_event(GstPad *pad, GstEvent *event)
{
GstVaapiDecode * const decode = GST_VAAPIDECODE(GST_OBJECT_PARENT(pad));
GST_DEBUG("handle src event '%s'", GST_EVENT_TYPE_NAME(event));
/* Propagate event upstream */
return gst_pad_push_event(decode->sinkpad, event);
}
static void
gst_vaapidecode_init(GstVaapiDecode *decode, GstVaapiDecodeClass *klass)
{
GstElementClass * const element_class = GST_ELEMENT_CLASS(klass);
decode->display = NULL;
decode->profile = 0;
decode->codec_data = NULL;
decode->decoder = NULL;
decode->use_ffmpeg = TRUE;
/* Pad through which data comes in to the element */
decode->sinkpad = gst_pad_new_from_template(
gst_element_class_get_pad_template(element_class, "sink"),
"sink"
);
gst_pad_set_setcaps_function(decode->sinkpad, gst_vaapidecode_set_caps);
gst_pad_set_chain_function(decode->sinkpad, gst_vaapidecode_chain);
gst_pad_set_event_function(decode->sinkpad, gst_vaapidecode_sink_event);
gst_element_add_pad(GST_ELEMENT(decode), decode->sinkpad);
/* Pad through which data goes out of the element */
decode->srcpad = gst_pad_new_from_template(
gst_element_class_get_pad_template(element_class, "src"),
"src"
);
gst_pad_set_event_function(decode->srcpad, gst_vaapidecode_src_event);
gst_element_add_pad(GST_ELEMENT(decode), decode->srcpad);
}
static gboolean plugin_init(GstPlugin *plugin)
{
GST_DEBUG_CATEGORY_INIT(gst_debug_vaapidecode,
GST_PLUGIN_NAME, 0, GST_PLUGIN_DESC);
return gst_element_register(plugin,
GST_PLUGIN_NAME,
GST_RANK_PRIMARY,
GST_TYPE_VAAPIDECODE);
}
GST_PLUGIN_DEFINE(
GST_VERSION_MAJOR, GST_VERSION_MINOR,
GST_PLUGIN_NAME,
GST_PLUGIN_DESC,
plugin_init,
PACKAGE_VERSION,
"GPL",
PACKAGE,
PACKAGE_BUGREPORT);