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gl: Add glviewconvert, glstereomix and glstereosplit elements

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Conversion elements for transforming multiview/stereoscopic video

https://bugzilla.gnome.org/show_bug.cgi?id=611157
This commit is contained in:
Jan Schmidt 2015-05-30 02:29:04 +10:00 committed by Tim-Philipp Müller
parent 77676ffc90
commit 020c7f1303
8 changed files with 2208 additions and 0 deletions
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6
ext/gl/Makefile.am
View file

@ -61,6 +61,9 @@ if USE_OPENGL
libgstopengl_la_SOURCES += \
gstglfilterglass.c \
gstgldeinterlace.c \
gstglviewconvert.c \
gstglstereosplit.c \
gstglstereomix.c \
gltestsrc.c \
gstgltestsrc.c \
gstglmosaic.c
@ -68,6 +71,9 @@ libgstopengl_la_SOURCES += \
noinst_HEADERS += \
gstglfilterglass.h \
gstgldeinterlace.h \
gstglstereosplit.h \
gstglstereomix.h \
gstglviewconvert.h \
gltestsrc.h \
gstgltestsrc.h \
gstglmosaic.h \

702
ext/gl/gstglstereomix.c Normal file
View file

@ -0,0 +1,702 @@
/*
* Combine video streams to 3D stereo
*
* GStreamer
* Copyright (C) 2009 Julien Isorce <julien.isorce@gmail.com>
* Copyright (C) 2014 Jan Schmidt <jan@noraisin.net>
*
* 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 "gstglstereomix.h"
#define GST_CAT_DEFAULT gst_gl_stereo_mix_debug
GST_DEBUG_CATEGORY (gst_gl_stereo_mix_debug);
#define gst_gl_stereo_mix_parent_class parent_class
G_DEFINE_TYPE (GstGLStereoMix, gst_gl_stereo_mix, GST_TYPE_GL_MIXER);
static GstCaps *_update_caps (GstVideoAggregator * vagg, GstCaps * caps);
static gboolean _negotiated_caps (GstVideoAggregator * videoaggregator,
GstCaps * caps);
gboolean gst_gl_stereo_mix_make_output (GstGLStereoMix * mix);
static gboolean gst_gl_stereo_mix_process_frames (GstGLStereoMix * mixer,
GPtrArray * in_frames);
#define DEFAULT_DOWNMIX GST_GL_STEREO_DOWNMIX_ANAGLYPH_GREEN_MAGENTA_DUBOIS
/* GLStereoMix signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_DOWNMIX_MODE
};
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
"RGBA") "; "
GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META,
"RGBA")
"; " GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS))
);
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
"RGBA") "; "
GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META,
"RGBA")
"; " GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS))
);
static GstFlowReturn gst_gl_stereo_mix_get_output_buffer (GstVideoAggregator *
videoaggregator, GstBuffer ** outbuf);
static gboolean gst_gl_stereo_mix_stop (GstAggregator * agg);
static gboolean gst_gl_stereo_mix_start (GstAggregator * agg);
static gboolean gst_gl_stereo_mix_src_query (GstAggregator * agg,
GstQuery * query);
static void
gst_gl_stereo_mix_find_best_format (GstVideoAggregator * vagg,
GstCaps * downstream_caps, GstVideoInfo * best_info,
gboolean * at_least_one_alpha);
static void gst_gl_stereo_mix_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_gl_stereo_mix_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_gl_stereo_mix_finalize (GObject * object);
static GstFlowReturn
gst_gl_stereo_mix_aggregate_frames (GstVideoAggregator * vagg,
GstBuffer * outbuffer);
static void
gst_gl_stereo_mix_class_init (GstGLStereoMixClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GstVideoAggregatorClass *videoaggregator_class =
(GstVideoAggregatorClass *) klass;
GstAggregatorClass *agg_class = (GstAggregatorClass *) klass;
GstGLBaseMixerClass *base_mix_class = (GstGLBaseMixerClass *) klass;
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "glstereomixer", 0,
"opengl stereoscopic mixer");
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_gl_stereo_mix_finalize);
gobject_class->get_property = gst_gl_stereo_mix_get_property;
gobject_class->set_property = gst_gl_stereo_mix_set_property;
gst_element_class_set_metadata (element_class, "OpenGL stereo video combiner",
"Filter/Effect/Video", "OpenGL stereo video combiner",
"Jan Schmidt <jan@centricular.com>");
g_object_class_install_property (gobject_class, PROP_DOWNMIX_MODE,
g_param_spec_enum ("downmix-mode", "Mode for mono downmixed output",
"Output anaglyph type to generate when downmixing to mono",
GST_TYPE_GL_STEREO_DOWNMIX_MODE_TYPE, DEFAULT_DOWNMIX,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_factory));
agg_class->stop = gst_gl_stereo_mix_stop;
agg_class->start = gst_gl_stereo_mix_start;
agg_class->src_query = gst_gl_stereo_mix_src_query;
videoaggregator_class->aggregate_frames = gst_gl_stereo_mix_aggregate_frames;
videoaggregator_class->update_caps = _update_caps;
videoaggregator_class->negotiated_caps = _negotiated_caps;
videoaggregator_class->get_output_buffer =
gst_gl_stereo_mix_get_output_buffer;
videoaggregator_class->find_best_format = gst_gl_stereo_mix_find_best_format;
videoaggregator_class->preserve_update_caps_result = TRUE;
base_mix_class->supported_gl_api = GST_GL_API_OPENGL | GST_GL_API_OPENGL3;
}
static void
gst_gl_stereo_mix_init (GstGLStereoMix * mix)
{
}
static void
gst_gl_stereo_mix_finalize (GObject * object)
{
//GstGLStereoMix *mix = GST_GL_STEREO_MIX (object);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_gl_stereo_mix_query_caps (GstPad * pad, GstAggregator * agg,
GstQuery * query)
{
GstCaps *filter, *caps;
gst_query_parse_caps (query, &filter);
caps = gst_pad_get_current_caps (agg->srcpad);
if (caps == NULL) {
caps = gst_pad_get_pad_template_caps (agg->srcpad);
}
if (filter)
caps = gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
gst_query_set_caps_result (query, caps);
gst_caps_unref (caps);
return TRUE;
}
static gboolean
gst_gl_stereo_mix_src_query (GstAggregator * agg, GstQuery * query)
{
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CAPS:
return gst_gl_stereo_mix_query_caps (agg->srcpad, agg, query);
break;
default:
break;
}
return GST_AGGREGATOR_CLASS (parent_class)->src_query (agg, query);
}
static GstFlowReturn
gst_gl_stereo_mix_get_output_buffer (GstVideoAggregator * videoaggregator,
GstBuffer ** outbuf)
{
GstGLStereoMix *mix = GST_GL_STEREO_MIX (videoaggregator);
GstFlowReturn ret = GST_FLOW_OK;
#if 0
if (!mix->priv->pool_active) {
if (!gst_buffer_pool_set_active (mix->priv->pool, TRUE)) {
GST_ELEMENT_ERROR (mix, RESOURCE, SETTINGS,
("failed to activate bufferpool"), ("failed to activate bufferpool"));
return GST_FLOW_ERROR;
}
mix->priv->pool_active = TRUE;
}
return gst_buffer_pool_acquire_buffer (mix->priv->pool, outbuf, NULL);
#endif
if (!gst_gl_stereo_mix_make_output (mix)) {
gst_buffer_replace (&mix->primary_out, NULL);
gst_buffer_replace (&mix->auxilliary_out, NULL);
GST_ELEMENT_ERROR (mix, RESOURCE, SETTINGS,
("Failed to generate output"), ("failed to generate output"));
ret = GST_FLOW_ERROR;
}
if (mix->auxilliary_out) {
*outbuf = mix->auxilliary_out;
mix->auxilliary_out = NULL;
} else {
*outbuf = mix->primary_out;
mix->primary_out = NULL;
}
return ret;
}
gboolean
gst_gl_stereo_mix_make_output (GstGLStereoMix * mix)
{
guint i;
GList *walk;
gboolean res = FALSE;
guint array_index = 0;
GstElement *element = GST_ELEMENT (mix);
gboolean missing_buffer = FALSE;
GST_LOG_OBJECT (mix, "Processing buffers");
GST_OBJECT_LOCK (mix);
walk = element->sinkpads;
i = mix->frames->len;
g_ptr_array_set_size (mix->frames, element->numsinkpads);
for (; i < element->numsinkpads; i++)
mix->frames->pdata[i] = g_slice_new0 (GstGLStereoMixFrameData);
while (walk) {
GstGLMixerPad *pad = GST_GL_MIXER_PAD (walk->data);
GstVideoAggregatorPad *vaggpad = walk->data;
GstGLStereoMixFrameData *frame;
GST_LOG_OBJECT (mix, "Checking pad %" GST_PTR_FORMAT, vaggpad);
frame = g_ptr_array_index (mix->frames, array_index);
frame->base.pad = pad;
frame->buf = NULL;
walk = g_list_next (walk);
if (vaggpad->buffer != NULL) {
frame->buf = vaggpad->buffer;
GST_DEBUG_OBJECT (pad, "Got buffer %" GST_PTR_FORMAT, frame->buf);
} else {
GST_LOG_OBJECT (mix, "No buffer on pad %" GST_PTR_FORMAT, vaggpad);
missing_buffer = TRUE;
}
++array_index;
}
if (missing_buffer) {
/* We're still waiting for a buffer to turn up on at least one input */
GST_WARNING_OBJECT (mix, "Not generating output - need more input buffers");
res = TRUE;
goto out;
}
/* Copy GL memory from each input frame to the output */
if (!gst_gl_stereo_mix_process_frames (mix, mix->frames)) {
GST_LOG_OBJECT (mix, "Failed to process frames to output");
goto out;
}
if (mix->primary_out == NULL)
goto out;
res = TRUE;
out:
GST_OBJECT_UNLOCK (mix);
return res;
}
static GstFlowReturn
gst_gl_stereo_mix_aggregate_frames (GstVideoAggregator * vagg,
GstBuffer * outbuf)
{
GstGLStereoMix *mix = GST_GL_STEREO_MIX (vagg);
/* If we're operating in frame-by-frame mode, push
* the primary view now, and let the parent class
* push the remaining auxilliary view */
if (GST_VIDEO_INFO_MULTIVIEW_MODE (&vagg->info) ==
GST_VIDEO_MULTIVIEW_MODE_FRAME_BY_FRAME) {
/* Transfer the timestamps video-agg put on the aux buffer */
gst_buffer_copy_into (mix->primary_out, outbuf,
GST_BUFFER_COPY_TIMESTAMPS, 0, -1);
gst_aggregator_finish_buffer (GST_AGGREGATOR (vagg), mix->primary_out);
mix->primary_out = NULL;
/* And actually, we don't want timestamps on the aux buffer */
GST_BUFFER_TIMESTAMP (outbuf) = GST_CLOCK_TIME_NONE;
GST_BUFFER_DURATION (outbuf) = GST_CLOCK_TIME_NONE;
}
return GST_FLOW_OK;
}
static void
gst_gl_stereo_mix_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstGLStereoMix *mix = GST_GL_STEREO_MIX (object);
switch (prop_id) {
case PROP_DOWNMIX_MODE:
g_value_set_enum (value, mix->downmix_mode);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_gl_stereo_mix_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstGLStereoMix *mix = GST_GL_STEREO_MIX (object);
switch (prop_id) {
case PROP_DOWNMIX_MODE:
mix->downmix_mode = g_value_get_enum (value);
if (mix->viewconvert)
g_object_set_property (G_OBJECT (mix->viewconvert), "downmix-mode",
value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
_free_glmixer_frame_data (GstGLStereoMixFrameData * frame)
{
if (frame == NULL)
return;
if (frame->buf)
gst_buffer_unref (frame->buf);
g_slice_free1 (sizeof (GstGLStereoMixFrameData), frame);
}
static gboolean
gst_gl_stereo_mix_start (GstAggregator * agg)
{
guint i;
GstGLStereoMix *mix = GST_GL_STEREO_MIX (agg);
GstElement *element = GST_ELEMENT (agg);
if (!GST_AGGREGATOR_CLASS (parent_class)->start (agg))
return FALSE;
GST_OBJECT_LOCK (mix);
mix->array_buffers = g_ptr_array_new_full (element->numsinkpads,
(GDestroyNotify) _free_glmixer_frame_data);
mix->frames = g_ptr_array_new_full (element->numsinkpads, NULL);
g_ptr_array_set_size (mix->array_buffers, element->numsinkpads);
g_ptr_array_set_size (mix->frames, element->numsinkpads);
for (i = 0; i < element->numsinkpads; i++)
mix->frames->pdata[i] = g_slice_new0 (GstGLStereoMixFrameData);
mix->viewconvert = gst_gl_view_convert_new ();
g_object_set (G_OBJECT (mix->viewconvert), "downmix-mode",
mix->downmix_mode, NULL);
GST_OBJECT_UNLOCK (mix);
return TRUE;
}
static gboolean
gst_gl_stereo_mix_stop (GstAggregator * agg)
{
GstGLStereoMix *mix = GST_GL_STEREO_MIX (agg);
if (!GST_AGGREGATOR_CLASS (parent_class)->stop (agg))
return FALSE;
GST_OBJECT_LOCK (agg);
g_ptr_array_free (mix->frames, TRUE);
mix->frames = NULL;
g_ptr_array_free (mix->array_buffers, TRUE);
mix->array_buffers = NULL;
GST_OBJECT_UNLOCK (agg);
if (mix->viewconvert) {
gst_object_unref (mix->viewconvert);
mix->viewconvert = NULL;
}
return TRUE;
}
/* Convert to caps that can be accepted by this element... */
static GstCaps *
get_converted_caps (GstGLStereoMix * mix, GstCaps * caps)
{
#if 0
GstGLContext *context = GST_GL_BASE_MIXER (mix)->context;
GstCaps *result, *tmp;
GST_LOG_OBJECT (mix, "Converting caps %" GST_PTR_FORMAT, caps);
result = gst_gl_upload_transform_caps (context, GST_PAD_SINK, caps, NULL);
tmp = result;
GST_TRACE_OBJECT (mix, "transfer returned caps %" GST_PTR_FORMAT, tmp);
result =
gst_gl_color_convert_transform_caps (context, GST_PAD_SINK, tmp, NULL);
gst_caps_unref (tmp);
GST_TRACE_OBJECT (mix, "convert returned caps %" GST_PTR_FORMAT, tmp);
tmp = result;
result = gst_gl_view_convert_transform_caps (mix->viewconvert,
GST_PAD_SINK, tmp, NULL);
gst_caps_unref (tmp);
#else
GstCaps *result;
GST_LOG_OBJECT (mix, "Converting caps %" GST_PTR_FORMAT, caps);
result = gst_gl_view_convert_transform_caps (mix->viewconvert,
GST_PAD_SINK, caps, NULL);
#endif
GST_LOG_OBJECT (mix, "returning caps %" GST_PTR_FORMAT, result);
return result;
}
/* Return the possible output caps we decided in find_best_format() */
static GstCaps *
_update_caps (GstVideoAggregator * vagg, GstCaps * caps)
{
GstGLStereoMix *mix = GST_GL_STEREO_MIX (vagg);
return gst_caps_ref (mix->out_caps);
}
/* Called after videoaggregator fixates our caps */
static gboolean
_negotiated_caps (GstVideoAggregator * vagg, GstCaps * caps)
{
GstGLStereoMix *mix = GST_GL_STEREO_MIX (vagg);
GST_LOG_OBJECT (mix, "Configured output caps %" GST_PTR_FORMAT, caps);
if (GST_VIDEO_AGGREGATOR_CLASS (parent_class)->negotiated_caps)
if (!GST_VIDEO_AGGREGATOR_CLASS (parent_class)->negotiated_caps (vagg,
caps))
return FALSE;
/* Update the glview_convert output */
if (!gst_video_info_from_caps (&mix->out_info, caps))
return FALSE;
/* We can configure the view_converter now */
gst_gl_view_convert_set_context (mix->viewconvert,
GST_GL_BASE_MIXER (mix)->context);
gst_gl_view_convert_set_format (mix->viewconvert, &mix->mix_info,
&mix->out_info);
return TRUE;
}
static gboolean
gst_gl_stereo_mix_process_frames (GstGLStereoMix * mixer, GPtrArray * frames)
{
GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (mixer);
GstBuffer *converted_buffer, *inbuf;
GstVideoInfo *out_info = &vagg->info;
gint count = 0, n;
gint v, views;
gint valid_views = 0;
inbuf = gst_buffer_new ();
while (count < frames->len) {
GstGLStereoMixFrameData *frame;
GstMemory *in_mem;
frame = g_ptr_array_index (frames, count);
GST_LOG_OBJECT (mixer, "Handling frame %d", count);
if (!frame) {
GST_DEBUG ("skipping texture, null frame");
count++;
continue;
}
in_mem = gst_buffer_get_memory (frame->buf, 0);
GST_LOG_OBJECT (mixer,
"Appending memory %" GST_PTR_FORMAT " to intermediate buffer", in_mem);
/* Appending the memory to a 2nd buffer locks it
* exclusive a 2nd time, which will mark it for
* copy-on-write. The ref will keep the memory
* alive but we add a parent_buffer_meta to also
* prevent the input buffer from returning to any buffer
* pool it might belong to
*/
gst_buffer_append_memory (inbuf, in_mem);
/* Use parent buffer meta to keep input buffer alive */
gst_buffer_add_parent_buffer_meta (inbuf, frame->buf);
count++;
valid_views++;
}
if (mixer->mix_info.views != valid_views) {
GST_WARNING_OBJECT (mixer, "Not enough input views to process");
return FALSE;
}
if (GST_VIDEO_INFO_MULTIVIEW_MODE (out_info) ==
GST_VIDEO_MULTIVIEW_MODE_SEPARATED)
views = out_info->views;
else
views = 1;
if (gst_gl_view_convert_submit_input_buffer (mixer->viewconvert,
FALSE, inbuf) != GST_FLOW_OK)
return FALSE;
/* Clear any existing buffers, just in case */
gst_buffer_replace (&mixer->primary_out, NULL);
gst_buffer_replace (&mixer->auxilliary_out, NULL);
if (gst_gl_view_convert_get_output (mixer->viewconvert,
&mixer->primary_out) != GST_FLOW_OK)
return FALSE;
if (GST_VIDEO_INFO_MULTIVIEW_MODE (out_info) ==
GST_VIDEO_MULTIVIEW_MODE_FRAME_BY_FRAME) {
if (gst_gl_view_convert_get_output (mixer->viewconvert,
&mixer->auxilliary_out) != GST_FLOW_OK)
return FALSE;
}
if (mixer->primary_out == NULL)
return FALSE;
converted_buffer = mixer->primary_out;
v = 0;
n = gst_buffer_n_memory (converted_buffer);
g_assert (n == GST_VIDEO_INFO_N_PLANES (out_info) * views);
for (v = 0; v < views; v++) {
gst_buffer_add_video_meta_full (converted_buffer, v,
GST_VIDEO_INFO_FORMAT (out_info),
GST_VIDEO_INFO_WIDTH (out_info),
GST_VIDEO_INFO_HEIGHT (out_info),
GST_VIDEO_INFO_N_PLANES (out_info), out_info->offset, out_info->stride);
if (mixer->auxilliary_out) {
gst_buffer_add_video_meta_full (mixer->auxilliary_out, v,
GST_VIDEO_INFO_FORMAT (out_info),
GST_VIDEO_INFO_WIDTH (out_info),
GST_VIDEO_INFO_HEIGHT (out_info),
GST_VIDEO_INFO_N_PLANES (out_info), out_info->offset,
out_info->stride);
}
}
return TRUE;
}
/* Iterate the input sink pads, and choose the blend format
* we will generate before output conversion, which is RGBA
* at some suitable size */
static void
gst_gl_stereo_mix_find_best_format (GstVideoAggregator * vagg,
GstCaps * downstream_caps, GstVideoInfo * best_info,
gboolean * at_least_one_alpha)
{
GstGLStereoMix *mix = GST_GL_STEREO_MIX (vagg);
GList *l;
gint best_width = -1, best_height = -1;
gdouble best_fps = -1, cur_fps;
gint best_fps_n = 0, best_fps_d = 1;
GstVideoInfo *mix_info;
GstCaps *blend_caps, *tmp_caps;
/* We'll deal with alpha internally, so just tell aggregator to
* be quiet */
*at_least_one_alpha = FALSE;
GST_OBJECT_LOCK (vagg);
for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) {
GstVideoAggregatorPad *pad = l->data;
GstVideoInfo tmp = pad->info;
gint this_width, this_height;
gint fps_n, fps_d;
if (!pad->info.finfo)
continue;
/* This can happen if we release a pad and another pad hasn't been negotiated_caps yet */
if (GST_VIDEO_INFO_FORMAT (&pad->info) == GST_VIDEO_FORMAT_UNKNOWN)
continue;
/* Convert to per-view width/height for unpacked forms */
gst_video_multiview_video_info_change_mode (&tmp,
GST_VIDEO_MULTIVIEW_MODE_SEPARATED, GST_VIDEO_MULTIVIEW_FLAGS_NONE);
this_width = GST_VIDEO_INFO_WIDTH (&tmp);
this_height = GST_VIDEO_INFO_HEIGHT (&tmp);
fps_n = GST_VIDEO_INFO_FPS_N (&tmp);
fps_d = GST_VIDEO_INFO_FPS_D (&tmp);
GST_INFO_OBJECT (vagg, "Input pad %" GST_PTR_FORMAT
" w %u h %u", pad, this_width, this_height);
if (this_width == 0 || this_height == 0)
continue;
if (best_width < this_width)
best_width = this_width;
if (best_height < this_height)
best_height = this_height;
if (fps_d == 0)
cur_fps = 0.0;
else
gst_util_fraction_to_double (fps_n, fps_d, &cur_fps);
if (best_fps < cur_fps) {
best_fps = cur_fps;
best_fps_n = fps_n;
best_fps_d = fps_d;
}
/* FIXME: Preserve PAR for at least one input when different sized inputs */
}
GST_OBJECT_UNLOCK (vagg);
mix_info = &mix->mix_info;
gst_video_info_set_format (mix_info, GST_VIDEO_FORMAT_RGBA, best_width,
best_height);
GST_VIDEO_INFO_FPS_N (mix_info) = best_fps_n;
GST_VIDEO_INFO_FPS_D (mix_info) = best_fps_d;
GST_VIDEO_INFO_MULTIVIEW_MODE (mix_info) = GST_VIDEO_MULTIVIEW_MODE_SEPARATED;
GST_VIDEO_INFO_VIEWS (mix_info) = 2;
/* FIXME: If input is marked as flipped or flopped, preserve those flags */
GST_VIDEO_INFO_MULTIVIEW_FLAGS (mix_info) = GST_VIDEO_MULTIVIEW_FLAGS_NONE;
/* Choose our output format based on downstream preferences */
blend_caps = gst_video_info_to_caps (mix_info);
gst_caps_set_features (blend_caps, 0,
gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY));
tmp_caps = get_converted_caps (GST_GL_STEREO_MIX (vagg), blend_caps);
gst_caps_unref (blend_caps);
if (mix->out_caps)
gst_caps_unref (mix->out_caps);
mix->out_caps = gst_caps_intersect (downstream_caps, tmp_caps);
gst_caps_unref (tmp_caps);
GST_DEBUG_OBJECT (vagg, "Possible output caps %" GST_PTR_FORMAT,
mix->out_caps);
/* Tell videoaggregator our preferred size. Actual info gets
* overridden during caps nego */
*best_info = *mix_info;
}

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/*
* GStreamer
* Copyright (C) 2009 Julien Isorce <julien.isorce@gmail.com>
* Copyright (C) 2014 Jan Schmidt <jan@noraisin.net>
*
* 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.
*/
#ifndef __GST_GL_STEREO_MIX_H__
#define __GST_GL_STEREO_MIX_H__
#include "gstglmixer.h"
G_BEGIN_DECLS
#define GST_TYPE_GL_STEREO_MIX (gst_gl_stereo_mix_get_type())
#define GST_GL_STEREO_MIX(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GL_STEREO_MIX, GstGLStereoMix))
#define GST_GL_STEREO_MIX_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GL_STEREO_MIX, GstGLStereoMixClass))
#define GST_IS_GL_STEREO_MIX(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GL_STEREO_MIX))
#define GST_IS_GL_STEREO_MIX_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GL_STEREO_MIX))
#define GST_GL_STEREO_MIX_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_GL_STEREO_MIX,GstGLStereoMixClass))
typedef struct _GstGLStereoMix GstGLStereoMix;
typedef struct _GstGLStereoMixClass GstGLStereoMixClass;
typedef struct _GstGLStereoMixFrameData GstGLStereoMixFrameData;
struct _GstGLStereoMix
{
GstGLMixer mixer;
GPtrArray *array_buffers;
GPtrArray *frames;
GLuint out_tex_id;
GstGLDownload *download;
GstGLViewConvert *viewconvert;
GstGLStereoDownmix downmix_mode;
GstCaps *out_caps;
GstVideoInfo out_info;
GstVideoInfo mix_info;
GPtrArray *input_frames;
GstBuffer *primary_out;
GstBuffer *auxilliary_out;
};
struct _GstGLStereoMixClass
{
GstGLMixerClass mixer_class;
};
struct _GstGLStereoMixFrameData
{
GstGLMixerFrameData base;
gboolean mapped;
GstBuffer *buf;
};
GType gst_gl_stereo_mix_get_type(void);
G_END_DECLS
#endif /* __GST_GL_STEREO_MIX_H__ */

928
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/*
* GStreamer
* Copyright (C) 2015 Jan Schmidt <jan@centricular.com>
*
* 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-glstereosplit
*
* Receive a stereoscopic video stream and split into left/right
*
* <refsect2>
* <title>Examples</title>
* |[
* gst-launch videotestsrc ! glstereosplit name=s ! queue ! glimagesink s. ! queue ! glimagesink
* ]|
* FBO (Frame Buffer Object) and GLSL (OpenGL Shading Language) are required.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstglstereosplit.h"
#if GST_GL_HAVE_PLATFORM_EGL
#include <gst/gl/egl/gsteglimagememory.h>
#endif
#define GST_CAT_DEFAULT gst_gl_stereosplit_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
#define SUPPORTED_GL_APIS GST_GL_API_OPENGL | GST_GL_API_OPENGL3
#define DEBUG_INIT \
GST_DEBUG_CATEGORY_INIT (gst_gl_stereosplit_debug, "glstereosplit", 0, "glstereosplit element");
G_DEFINE_TYPE_WITH_CODE (GstGLStereoSplit, gst_gl_stereosplit,
GST_TYPE_ELEMENT, DEBUG_INIT);
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK, GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
"RGBA") "; "
#if GST_GL_HAVE_PLATFORM_EGL
GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_MEMORY_EGL_IMAGE,
"RGBA") "; "
#endif
GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META, "RGBA") "; "
GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS)
)
);
static GstStaticPadTemplate src_left_template = GST_STATIC_PAD_TEMPLATE ("left",
GST_PAD_SRC, GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
"RGBA")
#if 0
"; "
#if GST_GL_HAVE_PLATFORM_EGL
GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_MEMORY_EGL_IMAGE,
"RGBA") "; "
#endif
GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META, "RGBA") "; "
GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS)
#endif
)
);
static GstStaticPadTemplate src_right_template =
GST_STATIC_PAD_TEMPLATE ("right",
GST_PAD_SRC, GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
"RGBA")
#if 0
"; "
#if GST_GL_HAVE_PLATFORM_EGL
GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_MEMORY_EGL_IMAGE,
"RGBA") "; "
#endif
GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META, "RGBA") "; "
GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS)
#endif
)
);
static void stereosplit_reset (GstGLStereoSplit * self);
static void stereosplit_finalize (GstGLStereoSplit * self);
static void stereosplit_set_context (GstElement * element,
GstContext * context);
static GstFlowReturn stereosplit_chain (GstPad * pad, GstGLStereoSplit * split,
GstBuffer * buf);
static GstStateChangeReturn stereosplit_change_state (GstElement * element,
GstStateChange transition);
static gboolean stereosplit_sink_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static gboolean stereosplit_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean stereosplit_src_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static gboolean stereosplit_src_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean ensure_context (GstGLStereoSplit * self);
static void
gst_gl_stereosplit_class_init (GstGLStereoSplitClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_set_static_metadata (element_class,
"GLStereoSplit", "Codec/Converter",
"Splits a stereoscopic stream into separate left/right streams",
"Jan Schmidt <jan@centricular.com>\n"
"Matthew Waters <matthew@centricular.com>");
gobject_class->finalize = (GObjectFinalizeFunc) (stereosplit_finalize);
element_class->change_state = stereosplit_change_state;
element_class->set_context = stereosplit_set_context;
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_left_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_right_template));
}
static void
gst_gl_stereosplit_init (GstGLStereoSplit * self)
{
GstPad *pad;
pad = self->sink_pad =
gst_pad_new_from_static_template (&sink_template, "sink");
gst_pad_set_chain_function (pad, (GstPadChainFunction) (stereosplit_chain));
gst_pad_set_query_function (pad, stereosplit_sink_query);
gst_pad_set_event_function (pad, stereosplit_sink_event);
gst_element_add_pad (GST_ELEMENT (self), self->sink_pad);
pad = self->left_pad =
gst_pad_new_from_static_template (&src_left_template, "left");
gst_pad_set_query_function (pad, stereosplit_src_query);
gst_pad_set_event_function (pad, stereosplit_src_event);
gst_element_add_pad (GST_ELEMENT (self), self->left_pad);
pad = self->right_pad =
gst_pad_new_from_static_template (&src_right_template, "right");
gst_pad_set_query_function (pad, stereosplit_src_query);
gst_pad_set_event_function (pad, stereosplit_src_event);
gst_element_add_pad (GST_ELEMENT (self), self->right_pad);
self->viewconvert = gst_gl_view_convert_new ();
}
static void
stereosplit_reset (GstGLStereoSplit * self)
{
if (self->upload)
gst_object_replace ((GstObject **) & self->upload, NULL);
if (self->convert)
gst_object_replace ((GstObject **) & self->convert, NULL);
if (self->context)
gst_object_replace ((GstObject **) & self->context, NULL);
if (self->display)
gst_object_replace ((GstObject **) & self->display, NULL);
}
static void
stereosplit_finalize (GstGLStereoSplit * self)
{
GObjectClass *klass = G_OBJECT_CLASS (gst_gl_stereosplit_parent_class);
if (self->viewconvert)
gst_object_replace ((GstObject **) & self->viewconvert, NULL);
klass->finalize ((GObject *) (self));
}
static void
stereosplit_set_context (GstElement * element, GstContext * context)
{
GstGLStereoSplit *stereosplit = GST_GL_STEREOSPLIT (element);
gst_gl_handle_set_context (element, context, &stereosplit->display,
&stereosplit->other_context);
if (stereosplit->display)
gst_gl_display_filter_gl_api (stereosplit->display, SUPPORTED_GL_APIS);
}
static GstStateChangeReturn
stereosplit_change_state (GstElement * element, GstStateChange transition)
{
GstGLStereoSplit *stereosplit = GST_GL_STEREOSPLIT (element);
GstStateChangeReturn result;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!gst_gl_ensure_element_data (element, &stereosplit->display,
&stereosplit->other_context))
return GST_STATE_CHANGE_FAILURE;
gst_gl_display_filter_gl_api (stereosplit->display, SUPPORTED_GL_APIS);
break;
default:
break;
}
result =
GST_ELEMENT_CLASS (gst_gl_stereosplit_parent_class)->change_state
(element, transition);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
if (stereosplit->other_context) {
gst_object_unref (stereosplit->other_context);
stereosplit->other_context = NULL;
}
if (stereosplit->display) {
gst_object_unref (stereosplit->display);
stereosplit->display = NULL;
}
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
stereosplit_reset (stereosplit);
break;
default:
break;
}
return result;
}
static GstCaps *
stereosplit_transform_caps (GstGLStereoSplit * self, GstPadDirection direction,
GstCaps * caps, GstCaps * filter)
{
GstCaps *next_caps;
/* FIXME: Is this the right way to ensure a context here ? */
if (!ensure_context (self))
return NULL;
if (direction == GST_PAD_SINK) {
next_caps =
gst_gl_upload_transform_caps (self->context, direction, caps, filter);
caps = next_caps;
next_caps =
gst_gl_color_convert_transform_caps (self->context, direction, caps,
NULL);
gst_caps_unref (caps);
caps = next_caps;
next_caps =
gst_gl_view_convert_transform_caps (self->viewconvert, direction, caps,
NULL);
gst_caps_unref (caps);
} else {
next_caps =
gst_gl_view_convert_transform_caps (self->viewconvert, direction, caps,
filter);
caps = next_caps;
next_caps =
gst_gl_color_convert_transform_caps (self->context, direction, caps,
NULL);
gst_caps_unref (caps);
caps = next_caps;
next_caps =
gst_gl_upload_transform_caps (self->context, direction, caps, NULL);
gst_caps_unref (caps);
}
return next_caps;
}
static GstCaps *
strip_mview_fields (GstCaps * incaps, GstVideoMultiviewFlags keep_flags)
{
GstCaps *outcaps = gst_caps_make_writable (incaps);
gint i, n;
n = gst_caps_get_size (outcaps);
for (i = 0; i < n; i++) {
GstStructure *st = gst_caps_get_structure (outcaps, i);
GstVideoMultiviewFlags flags, mask;
gst_structure_remove_field (st, "multiview-mode");
if (gst_structure_get_flagset (st, "multiview-flags", &flags, &mask)) {
flags &= keep_flags;
mask = keep_flags;
gst_structure_set (st, "multiview-flags",
GST_TYPE_VIDEO_MULTIVIEW_FLAGSET, flags, mask, NULL);
}
}
return outcaps;
}
static gboolean stereosplit_do_bufferpool (GstGLStereoSplit * self,
GstCaps * caps);
static GstCaps *
stereosplit_get_src_caps (GstGLStereoSplit * split,
GstPad * pad, GstVideoMultiviewMode preferred_mode)
{
GstCaps *outcaps, *tmp, *templ_caps;
GValue item = G_VALUE_INIT, list = G_VALUE_INIT;
/* Get the template format */
templ_caps = gst_pad_get_pad_template_caps (pad);
/* And limit down to the preferred mode or mono */
templ_caps = gst_caps_make_writable (templ_caps);
g_value_init (&item, G_TYPE_STRING);
g_value_init (&list, GST_TYPE_LIST);
g_value_set_static_string (&item,
gst_video_multiview_mode_to_caps_string (preferred_mode));
gst_value_list_append_value (&list, &item);
g_value_set_static_string (&item,
gst_video_multiview_mode_to_caps_string (GST_VIDEO_MULTIVIEW_MODE_MONO));
gst_value_list_append_value (&list, &item);
gst_caps_set_value (templ_caps, "multiview-mode", &list);
g_value_unset (&list);
g_value_unset (&item);
/* And intersect with the peer */
if ((tmp = gst_pad_peer_query_caps (pad, NULL)) == NULL) {
gst_caps_unref (templ_caps);
return NULL;
}
outcaps = gst_caps_intersect_full (tmp, templ_caps, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (tmp);
gst_caps_unref (templ_caps);
GST_DEBUG_OBJECT (split, "Src pad %" GST_PTR_FORMAT " caps %" GST_PTR_FORMAT,
pad, outcaps);
return outcaps;
}
static gboolean
stereosplit_set_output_caps (GstGLStereoSplit * split, GstCaps * sinkcaps)
{
GstCaps *left = NULL, *right = NULL, *tridcaps = NULL;
GstCaps *tmp, *combined;
gboolean res = FALSE;
/* Choose some preferred output caps.
* Keep input width/height and PAR, preserve preferred output
* multiview flags for flipping/flopping if any, and set each
* left right pad to either left/mono and right/mono, as they prefer
*/
/* Calculate what downstream can collectively support */
left =
stereosplit_get_src_caps (split, split->left_pad,
GST_VIDEO_MULTIVIEW_MODE_LEFT);
if (left == NULL)
goto fail;
right =
stereosplit_get_src_caps (split, split->right_pad,
GST_VIDEO_MULTIVIEW_MODE_RIGHT);
if (right == NULL)
goto fail;
tridcaps = stereosplit_transform_caps (split, GST_PAD_SINK, sinkcaps, NULL);
if (!tridcaps || gst_caps_is_empty (tridcaps)) {
GST_ERROR_OBJECT (split,
"Failed to transform input caps %" GST_PTR_FORMAT, sinkcaps);
goto fail;
}
/* Preserve downstream preferred flipping/flopping */
tmp =
strip_mview_fields (gst_caps_ref (left),
GST_VIDEO_MULTIVIEW_FLAGS_LEFT_FLIPPED |
GST_VIDEO_MULTIVIEW_FLAGS_LEFT_FLOPPED);
combined = gst_caps_intersect (tridcaps, tmp);
gst_caps_unref (tridcaps);
gst_caps_unref (tmp);
tridcaps = combined;
tmp =
strip_mview_fields (gst_caps_ref (right),
GST_VIDEO_MULTIVIEW_FLAGS_RIGHT_FLIPPED |
GST_VIDEO_MULTIVIEW_FLAGS_RIGHT_FLOPPED);
combined = gst_caps_intersect (tridcaps, tmp);
gst_caps_unref (tridcaps);
gst_caps_unref (tmp);
tridcaps = combined;
if (G_UNLIKELY (gst_caps_is_empty (tridcaps))) {
gst_caps_unref (tridcaps);
goto fail;
}
/* Now generate the version for each output pad */
GST_DEBUG_OBJECT (split, "Attempting to set output caps %" GST_PTR_FORMAT,
tridcaps);
tmp = gst_caps_intersect (tridcaps, left);
gst_caps_unref (left);
left = tmp;
left = gst_caps_fixate (left);
if (!gst_pad_set_caps (split->left_pad, left)) {
GST_ERROR_OBJECT (split,
"Failed to set left output caps %" GST_PTR_FORMAT, left);
goto fail;
}
tmp = gst_caps_intersect (tridcaps, right);
gst_caps_unref (right);
right = tmp;
right = gst_caps_fixate (right);
if (!gst_pad_set_caps (split->right_pad, right)) {
GST_ERROR_OBJECT (split,
"Failed to set right output caps %" GST_PTR_FORMAT, right);
goto fail;
}
/* FIXME: Provide left and right caps to do_bufferpool */
stereosplit_do_bufferpool (split, left);
res = TRUE;
fail:
if (left)
gst_caps_unref (left);
if (right)
gst_caps_unref (right);
if (tridcaps)
gst_caps_unref (tridcaps);
return res;
}
static gboolean
_find_local_gl_context (GstGLStereoSplit * split)
{
GstQuery *query;
GstContext *context;
const GstStructure *s;
if (split->context)
return TRUE;
query = gst_query_new_context ("gst.gl.local_context");
if (!split->context
&& gst_gl_run_query (GST_ELEMENT (split), query, GST_PAD_SRC)) {
gst_query_parse_context (query, &context);
if (context) {
s = gst_context_get_structure (context);
gst_structure_get (s, "context", GST_GL_TYPE_CONTEXT, &split->context,
NULL);
}
}
if (!split->context
&& gst_gl_run_query (GST_ELEMENT (split), query, GST_PAD_SINK)) {
gst_query_parse_context (query, &context);
if (context) {
s = gst_context_get_structure (context);
gst_structure_get (s, "context", GST_GL_TYPE_CONTEXT, &split->context,
NULL);
}
}
GST_DEBUG_OBJECT (split, "found local context %p", split->context);
gst_query_unref (query);
if (split->context)
return TRUE;
return FALSE;
}
static void
_init_upload (GstGLStereoSplit * split)
{
GstGLContext *context = split->context;
if (!split->upload) {
GstCaps *in_caps = gst_pad_get_current_caps (GST_PAD (split->sink_pad));
GstCaps *split_caps = gst_pad_get_current_caps (split->left_pad);
GstCaps *upload_caps = gst_caps_copy (in_caps);
GstCapsFeatures *gl_features =
gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
GstCaps *gl_caps;
split->upload = gst_gl_upload_new (context);
gst_caps_set_features (upload_caps, 0,
gst_caps_features_copy (gl_features));
gst_gl_upload_set_caps (split->upload, in_caps, upload_caps);
gst_caps_unref (in_caps);
gl_caps = gst_caps_copy (upload_caps);
gst_caps_set_simple (gl_caps, "format", G_TYPE_STRING, "RGBA", NULL);
gst_caps_set_features (gl_caps, 0, gst_caps_features_copy (gl_features));
if (!split->convert) {
split->convert = gst_gl_color_convert_new (context);
gst_gl_color_convert_set_caps (split->convert, upload_caps, gl_caps);
}
gst_caps_unref (upload_caps);
gst_caps_features_free (gl_features);
gst_gl_view_convert_set_context (split->viewconvert, split->context);
split_caps = gst_caps_make_writable (split_caps);
gst_caps_set_simple (split_caps, "multiview-mode", G_TYPE_STRING,
"separated", "views", G_TYPE_INT, 2, NULL);
gst_gl_view_convert_set_caps (split->viewconvert, gl_caps, split_caps);
gst_caps_unref (split_caps);
gst_caps_unref (gl_caps);
}
}
static gboolean
ensure_context (GstGLStereoSplit * self)
{
GError *error = NULL;
if (!gst_gl_ensure_element_data (self, &self->display, &self->other_context))
return FALSE;
gst_gl_display_filter_gl_api (self->display, SUPPORTED_GL_APIS);
_find_local_gl_context (self);
if (!self->context) {
GST_OBJECT_LOCK (self->display);
do {
if (self->context)
gst_object_unref (self->context);
/* just get a GL context. we don't care */
self->context =
gst_gl_display_get_gl_context_for_thread (self->display, NULL);
if (!self->context) {
self->context = gst_gl_context_new (self->display);
if (!gst_gl_context_create (self->context, self->other_context, &error))
goto context_error;
}
} while (!gst_gl_display_add_context (self->display, self->context));
GST_OBJECT_UNLOCK (self->display);
}
return TRUE;
context_error:
{
GST_ELEMENT_ERROR (self, RESOURCE, NOT_FOUND, ("%s", error->message),
(NULL));
return FALSE;
}
}
static gboolean
stereosplit_decide_allocation (GstGLStereoSplit * self, GstQuery * query)
{
if (!ensure_context (self))
return FALSE;
if (self->upload)
gst_object_replace ((GstObject **) & self->upload, NULL);
if (self->convert)
gst_object_replace ((GstObject **) & self->convert, NULL);
return TRUE;
}
static gboolean
stereosplit_propose_allocation (GstGLStereoSplit * self, GstQuery * query)
{
if (!gst_gl_ensure_element_data (self, &self->display, &self->other_context))
return FALSE;
_init_upload (self);
gst_gl_upload_propose_allocation (self->upload, NULL, query);
return TRUE;
}
static gboolean
stereosplit_do_bufferpool (GstGLStereoSplit * self, GstCaps * caps)
{
GstQuery *query;
query = gst_query_new_allocation (caps, TRUE);
if (!gst_pad_peer_query (self->left_pad, query)) {
if (!gst_pad_peer_query (self->right_pad, query)) {
GST_DEBUG_OBJECT (self, "peer ALLOCATION query failed on both src pads");
}
}
if (!stereosplit_decide_allocation (self, query)) {
gst_query_unref (query);
return FALSE;
}
gst_query_unref (query);
return TRUE;
}
static GstFlowReturn
stereosplit_chain (GstPad * pad, GstGLStereoSplit * split, GstBuffer * buf)
{
GstBuffer *uploaded_buffer, *converted_buffer, *left, *right;
GstBuffer *split_buffer = NULL;
GstFlowReturn ret;
gint i, n_planes;
if (!split->upload)
_init_upload (split);
n_planes = GST_VIDEO_INFO_N_PLANES (&split->viewconvert->out_info);
GST_LOG_OBJECT (split, "chaining buffer %" GST_PTR_FORMAT, buf);
if (GST_GL_UPLOAD_DONE != gst_gl_upload_perform_with_buffer (split->upload,
buf, &uploaded_buffer)) {
gst_buffer_unref (buf);
GST_ELEMENT_ERROR (split, RESOURCE, NOT_FOUND, ("%s",
"Failed to upload buffer"), (NULL));
return GST_FLOW_ERROR;
}
gst_buffer_unref (buf);
if (!(converted_buffer =
gst_gl_color_convert_perform (split->convert, uploaded_buffer))) {
GST_ELEMENT_ERROR (split, RESOURCE, NOT_FOUND, ("%s",
"Failed to convert buffer"), (NULL));
gst_buffer_unref (uploaded_buffer);
return GST_FLOW_ERROR;
}
gst_buffer_unref (uploaded_buffer);
if (gst_gl_view_convert_submit_input_buffer (split->viewconvert,
GST_BUFFER_IS_DISCONT (converted_buffer),
converted_buffer) != GST_FLOW_OK) {
GST_ELEMENT_ERROR (split, RESOURCE, NOT_FOUND, ("%s",
"Failed to 3d convert buffer"),
("Could not get submit input buffer"));
return GST_FLOW_ERROR;
}
ret = gst_gl_view_convert_get_output (split->viewconvert, &split_buffer);
if (ret != GST_FLOW_OK) {
GST_ELEMENT_ERROR (split, RESOURCE, NOT_FOUND, ("%s",
"Failed to 3d convert buffer"), ("Could not get output buffer"));
return GST_FLOW_ERROR;
}
if (split_buffer == NULL)
return GST_FLOW_OK; /* Need another input buffer */
left = gst_buffer_new ();
gst_buffer_copy_into (left, buf,
GST_BUFFER_COPY_FLAGS | GST_BUFFER_COPY_TIMESTAMPS, 0, -1);
GST_BUFFER_FLAG_UNSET (left, GST_VIDEO_BUFFER_FLAG_FIRST_IN_BUNDLE);
gst_buffer_add_parent_buffer_meta (left, split_buffer);
for (i = 0; i < n_planes; i++) {
GstMemory *mem = gst_buffer_get_memory (split_buffer, i);
gst_buffer_append_memory (left, mem);
}
ret = gst_pad_push (split->left_pad, gst_buffer_ref (left));
/* Allow unlinked on the first pad - as long as the 2nd isn't unlinked */
gst_buffer_unref (left);
if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED)) {
gst_buffer_unref (split_buffer);
return ret;
}
right = gst_buffer_new ();
gst_buffer_copy_into (right, buf,
GST_BUFFER_COPY_FLAGS | GST_BUFFER_COPY_TIMESTAMPS, 0, -1);
GST_BUFFER_FLAG_UNSET (left, GST_VIDEO_BUFFER_FLAG_FIRST_IN_BUNDLE);
gst_buffer_add_parent_buffer_meta (right, split_buffer);
for (i = n_planes; i < n_planes * 2; i++) {
GstMemory *mem = gst_buffer_get_memory (split_buffer, i);
gst_buffer_append_memory (right, mem);
}
ret = gst_pad_push (split->right_pad, gst_buffer_ref (right));
gst_buffer_unref (right);
gst_buffer_unref (split_buffer);
return ret;
}
static gboolean
stereosplit_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstGLStereoSplit *split = GST_GL_STEREOSPLIT (parent);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CONTEXT:
{
const gchar *context_type;
GstContext *context, *old_context;
gboolean ret;
ret = gst_gl_handle_context_query ((GstElement *) split, query,
&split->display, &split->other_context);
if (split->display)
gst_gl_display_filter_gl_api (split->display, SUPPORTED_GL_APIS);
gst_query_parse_context_type (query, &context_type);
if (g_strcmp0 (context_type, "gst.gl.local_context") == 0) {
GstStructure *s;
gst_query_parse_context (query, &old_context);
if (old_context)
context = gst_context_copy (old_context);
else
context = gst_context_new ("gst.gl.local_context", FALSE);
s = gst_context_writable_structure (context);
gst_structure_set (s, "context", GST_GL_TYPE_CONTEXT, split->context,
NULL);
gst_query_set_context (query, context);
gst_context_unref (context);
ret = split->context != NULL;
}
GST_LOG_OBJECT (split, "context query of type %s %i", context_type, ret);
if (ret)
return ret;
return gst_pad_query_default (pad, parent, query);
}
/* FIXME: Handle caps query */
default:
return gst_pad_query_default (pad, parent, query);
}
}
static gboolean
stereosplit_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
return gst_pad_event_default (pad, parent, event);
}
static gboolean
stereosplit_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstGLStereoSplit *split = GST_GL_STEREOSPLIT (parent);
GST_DEBUG_OBJECT (split, "sink query %s",
gst_query_type_get_name (GST_QUERY_TYPE (query)));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CONTEXT:
{
const gchar *context_type;
GstContext *context, *old_context;
gboolean ret;
ret = gst_gl_handle_context_query ((GstElement *) split, query,
&split->display, &split->other_context);
if (split->display)
gst_gl_display_filter_gl_api (split->display, SUPPORTED_GL_APIS);
gst_query_parse_context_type (query, &context_type);
if (g_strcmp0 (context_type, "gst.gl.local_context") == 0) {
GstStructure *s;
gst_query_parse_context (query, &old_context);
if (old_context)
context = gst_context_copy (old_context);
else
context = gst_context_new ("gst.gl.local_context", FALSE);
s = gst_context_writable_structure (context);
gst_structure_set (s, "context", GST_GL_TYPE_CONTEXT, split->context,
NULL);
gst_query_set_context (query, context);
gst_context_unref (context);
ret = split->context != NULL;
}
GST_LOG_OBJECT (split, "context query of type %s %i", context_type, ret);
if (ret)
return ret;
return gst_pad_query_default (pad, parent, query);
}
case GST_QUERY_ALLOCATION:
{
return stereosplit_propose_allocation (split, query);
}
case GST_QUERY_ACCEPT_CAPS:
{
GstCaps *possible, *caps;
gboolean allowed;
gst_query_parse_accept_caps (query, &caps);
if (!(possible = gst_pad_query_caps (split->sink_pad, caps)))
return FALSE;
allowed = gst_caps_is_subset (caps, possible);
gst_caps_unref (possible);
gst_query_set_accept_caps_result (query, allowed);
return allowed;
}
case GST_QUERY_CAPS:
{
GstCaps *filter, *left, *right, *combined, *ret, *templ_caps;
gst_query_parse_caps (query, &filter);
/* Calculate what downstream can collectively support */
if (!(left = gst_pad_peer_query_caps (split->left_pad, NULL)))
return FALSE;
if (!(right = gst_pad_peer_query_caps (split->right_pad, NULL)))
return FALSE;
/* Strip out multiview mode and flags that might break the
* intersection, since we can convert.
* We could keep downstream preferred flip/flopping and list
* separated as preferred in the future which might
* theoretically allow us an easier conversion, but it's not essential
*/
left = strip_mview_fields (left, GST_VIDEO_MULTIVIEW_FLAGS_NONE);
right = strip_mview_fields (right, GST_VIDEO_MULTIVIEW_FLAGS_NONE);
combined = gst_caps_intersect (left, right);
gst_caps_unref (left);
gst_caps_unref (right);
/* Intersect peer caps with our template formats */
templ_caps = gst_pad_get_pad_template_caps (split->left_pad);
ret =
gst_caps_intersect_full (combined, templ_caps,
GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (templ_caps);
gst_caps_unref (combined);
combined = ret;
if (!combined || gst_caps_is_empty (combined)) {
gst_caps_unref (combined);
return FALSE;
}
/* Convert from the src pad caps to input formats we support */
ret = stereosplit_transform_caps (split, GST_PAD_SRC, combined, filter);
gst_caps_unref (combined);
combined = ret;
/* Intersect with the sink pad template then */
templ_caps = gst_pad_get_pad_template_caps (split->sink_pad);
ret =
gst_caps_intersect_full (combined, templ_caps,
GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (templ_caps);
GST_LOG_OBJECT (split, "Returning sink pad caps %" GST_PTR_FORMAT, ret);
gst_query_set_caps_result (query, ret);
return !gst_caps_is_empty (ret);
}
default:
return gst_pad_query_default (pad, parent, query);
}
}
static gboolean
stereosplit_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstGLStereoSplit *split = GST_GL_STEREOSPLIT (parent);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
return stereosplit_set_output_caps (split, caps);
}
default:
return gst_pad_event_default (pad, parent, event);
}
}

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/*
* GStreamer
* Copyright (C) 2015 Jan Schmidt <jan@centricular.com>
*
* 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.
*/
#ifndef __GST_GL_STEREOSPLIT_H__
#define __GST_GL_STEREOSPLIT_H__
#include <gst/gst.h>
#include <gst/video/video.h>
#include <gst/gl/gl.h>
G_BEGIN_DECLS
#define GST_TYPE_GL_STEREOSPLIT (gst_gl_stereosplit_get_type())
#define GST_GL_STEREOSPLIT(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GL_STEREOSPLIT,GstGLStereoSplit))
#define GST_IS_GL_STEREOSPLIT(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GL_STEREOSPLIT))
#define GST_GL_STEREOSPLIT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_GL_STEREOSPLIT,GstGLStereoSplitClass))
#define GST_IS_GL_STEREOSPLIT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_GL_STEREOSPLIT))
#define GST_GL_STEREOSPLIT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_GL_STEREOSPLIT,GstGLStereoSplitClass))
typedef struct _GstGLStereoSplit GstGLStereoSplit;
typedef struct _GstGLStereoSplitClass GstGLStereoSplitClass;
struct _GstGLStereoSplit
{
GstElement parent;
GstPad *sink_pad;
GstPad *left_pad;
GstPad *right_pad;
GstGLDisplay *display;
GstGLContext *context;
GstGLContext *other_context;
GstGLUpload *upload;
GstGLColorConvert *convert;
GstGLViewConvert *viewconvert;
};
struct _GstGLStereoSplitClass
{
GstElementClass parent_class;
};
GType gst_gl_stereosplit_get_type (void);
G_END_DECLS
#endif

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/*
* GStreamer
* Copyright (C) 2009 Julien Isorce <julien.isorce@mail.com>
* Copyright (C) 2014 Jan Schmidt <jan@centricular.com>
* Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
*
* 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-glviewconvert
*
* Convert stereoscopic video between different representations using fragment shaders.
*
* The element can use either property settings or caps negotiation to choose the
* input and output formats to process.
*
* <refsect2>
* <title>Examples</title>
* |[
* gst-launch-1.0 videotestsrc ! glviewconvert ! glimagesink
* ]|
* |[
* gst-launch-1.0 videotestsrc pattern=checkers-1 ! glviewconvert input-mode-override=side-by-side ! glimagesink -v
* ]|
* FBO (Frame Buffer Object) and GLSL (OpenGL Shading Language) are required.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/base/gstbasetransform.h>
#include "gstglviewconvert.h"
#define GST_CAT_DEFAULT gst_gl_view_convert_element_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
enum
{
PROP_0,
PROP_INPUT_LAYOUT,
PROP_INPUT_FLAGS,
PROP_OUTPUT_LAYOUT,
PROP_OUTPUT_FLAGS,
PROP_OUTPUT_DOWNMIX_MODE
};
#define DEFAULT_DOWNMIX GST_GL_STEREO_DOWNMIX_ANAGLYPH_GREEN_MAGENTA_DUBOIS
#define DEBUG_INIT \
GST_DEBUG_CATEGORY_INIT (gst_gl_view_convert_element_debug, "glview_convertelement", 0, "glview_convert element");
G_DEFINE_TYPE_WITH_CODE (GstGLViewConvertElement, gst_gl_view_convert_element,
GST_TYPE_GL_FILTER, DEBUG_INIT);
#define parent_class gst_gl_view_convert_element_parent_class
static void gst_gl_view_convert_dispose (GObject * object);
static void gst_gl_view_convert_element_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_gl_view_convert_element_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static gboolean gst_gl_view_convert_element_stop (GstBaseTransform * bt);
static gboolean
gst_gl_view_convert_element_set_caps (GstGLFilter * filter, GstCaps * incaps,
GstCaps * outcaps);
static GstCaps *gst_gl_view_convert_element_transform_internal_caps (GstGLFilter
* filter, GstPadDirection direction, GstCaps * caps, GstCaps * filter_caps);
static GstCaps *gst_gl_view_convert_element_fixate_caps (GstBaseTransform *
trans, GstPadDirection direction, GstCaps * caps, GstCaps * othercaps);
static GstFlowReturn
gst_gl_view_convert_element_submit_input_buffer (GstBaseTransform * trans,
gboolean is_discont, GstBuffer * input);
static gboolean
gst_gl_view_convert_element_generate_output_buffer (GstBaseTransform * bt,
GstBuffer ** outbuf);
static void
gst_gl_view_convert_element_class_init (GstGLViewConvertElementClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
gobject_class = (GObjectClass *) klass;
element_class = GST_ELEMENT_CLASS (klass);
gobject_class->set_property = gst_gl_view_convert_element_set_property;
gobject_class->get_property = gst_gl_view_convert_element_get_property;
gobject_class->dispose = gst_gl_view_convert_dispose;
gst_element_class_set_metadata (element_class,
"OpenGL Multiview/3D conversion filter", "Filter",
"Convert stereoscopic/multiview video formats",
"Jan Schmidt <jan@centricular.com>\n"
"Matthew Waters <matthew@centricular.com>");
GST_GL_FILTER_CLASS (klass)->set_caps = gst_gl_view_convert_element_set_caps;
GST_GL_FILTER_CLASS (klass)->transform_internal_caps =
gst_gl_view_convert_element_transform_internal_caps;
GST_BASE_TRANSFORM_CLASS (klass)->stop = gst_gl_view_convert_element_stop;
GST_BASE_TRANSFORM_CLASS (klass)->fixate_caps =
gst_gl_view_convert_element_fixate_caps;
GST_BASE_TRANSFORM_CLASS (klass)->submit_input_buffer =
gst_gl_view_convert_element_submit_input_buffer;
GST_BASE_TRANSFORM_CLASS (klass)->generate_output =
gst_gl_view_convert_element_generate_output_buffer;
g_object_class_install_property (gobject_class, PROP_INPUT_LAYOUT,
g_param_spec_enum ("input-mode-override",
"Input Multiview Mode Override",
"Override any input information about multiview layout",
GST_TYPE_VIDEO_MULTIVIEW_FRAME_PACKING,
GST_VIDEO_MULTIVIEW_MODE_NONE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_INPUT_FLAGS,
g_param_spec_flags ("input-flags-override",
"Input Multiview Flags Override",
"Override any input information about multiview layout flags",
GST_TYPE_VIDEO_MULTIVIEW_FLAGS, GST_VIDEO_MULTIVIEW_FLAGS_NONE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_OUTPUT_LAYOUT,
g_param_spec_enum ("output-mode-override",
"Output Multiview Mode Override",
"Override automatic output mode selection for multiview layout",
GST_TYPE_VIDEO_MULTIVIEW_MODE, GST_VIDEO_MULTIVIEW_MODE_NONE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_OUTPUT_FLAGS,
g_param_spec_flags ("output-flags-override",
"Output Multiview Flags Override",
"Override automatic negotiation for output multiview layout flags",
GST_TYPE_VIDEO_MULTIVIEW_FLAGS, GST_VIDEO_MULTIVIEW_FLAGS_NONE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_OUTPUT_DOWNMIX_MODE,
g_param_spec_enum ("downmix-mode", "Mode for mono downmixed output",
"Output anaglyph type to generate when downmixing to mono",
GST_TYPE_GL_STEREO_DOWNMIX_MODE_TYPE, DEFAULT_DOWNMIX,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void
gst_gl_view_convert_element_init (GstGLViewConvertElement * convert)
{
convert->viewconvert = gst_gl_view_convert_new ();
}
static void
gst_gl_view_convert_dispose (GObject * object)
{
GstGLViewConvertElement *convert = GST_GL_VIEW_CONVERT_ELEMENT (object);
if (convert->viewconvert) {
gst_object_unref (convert->viewconvert);
convert->viewconvert = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static gboolean
gst_gl_view_convert_element_set_caps (GstGLFilter * filter, GstCaps * incaps,
GstCaps * outcaps)
{
GstGLViewConvertElement *viewconvert_filter =
GST_GL_VIEW_CONVERT_ELEMENT (filter);
GstCapsFeatures *gl_features;
gboolean ret;
GST_DEBUG_OBJECT (filter, "incaps %" GST_PTR_FORMAT
" outcaps %" GST_PTR_FORMAT, incaps, outcaps);
/* The view_convert component needs RGBA caps */
incaps = gst_caps_copy (incaps);
outcaps = gst_caps_copy (outcaps);
gst_caps_set_simple (incaps, "format", G_TYPE_STRING, "RGBA", NULL);
gl_features =
gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
gst_caps_set_features (incaps, 0, gl_features);
gst_caps_set_simple (outcaps, "format", G_TYPE_STRING, "RGBA", NULL);
gl_features =
gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
gst_caps_set_features (outcaps, 0, gl_features);
ret = gst_gl_view_convert_set_caps (viewconvert_filter->viewconvert,
incaps, outcaps);
gst_caps_unref (incaps);
gst_caps_unref (outcaps);
return ret;
}
static GstCaps *
gst_gl_view_convert_element_transform_internal_caps (GstGLFilter * filter,
GstPadDirection direction, GstCaps * caps, GstCaps * filter_caps)
{
GstGLViewConvertElement *viewconvert_filter =
GST_GL_VIEW_CONVERT_ELEMENT (filter);
GstCaps *result;
GST_DEBUG_OBJECT (filter, "dir %s transforming caps: %" GST_PTR_FORMAT,
direction == GST_PAD_SINK ? "sink" : "src", caps);
result =
gst_gl_view_convert_transform_caps (viewconvert_filter->viewconvert,
direction, caps, NULL);
GST_DEBUG_OBJECT (filter, "returning caps: %" GST_PTR_FORMAT, result);
return result;
}
static GstCaps *
gst_gl_view_convert_element_fixate_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, GstCaps * othercaps)
{
GstGLViewConvertElement *viewconvert_filter =
GST_GL_VIEW_CONVERT_ELEMENT (trans);
othercaps = gst_gl_view_convert_fixate_caps (viewconvert_filter->viewconvert,
direction, caps, othercaps);
if (gst_caps_is_empty (othercaps))
return othercaps;
/* Let GLfilter do the rest */
return
GST_BASE_TRANSFORM_CLASS
(gst_gl_view_convert_element_parent_class)->fixate_caps (trans, direction,
caps, othercaps);
}
static gboolean
gst_gl_view_convert_element_stop (GstBaseTransform * bt)
{
GstGLViewConvertElement *viewconvert_filter =
GST_GL_VIEW_CONVERT_ELEMENT (bt);
gst_gl_view_convert_reset (viewconvert_filter->viewconvert);
return GST_BASE_TRANSFORM_CLASS (parent_class)->stop (bt);
}
static void
gst_gl_view_convert_element_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstGLViewConvertElement *convert = GST_GL_VIEW_CONVERT_ELEMENT (object);
switch (prop_id) {
case PROP_INPUT_LAYOUT:
case PROP_INPUT_FLAGS:
g_object_set_property (G_OBJECT (convert->viewconvert), pspec->name,
value);
gst_base_transform_reconfigure_src (GST_BASE_TRANSFORM (convert));
break;
case PROP_OUTPUT_LAYOUT:
case PROP_OUTPUT_FLAGS:
g_object_set_property (G_OBJECT (convert->viewconvert), pspec->name,
value);
gst_base_transform_reconfigure_src (GST_BASE_TRANSFORM (convert));
break;
case PROP_OUTPUT_DOWNMIX_MODE:
g_object_set_property (G_OBJECT (convert->viewconvert), pspec->name,
value);
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_gl_view_convert_element_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstGLViewConvertElement *convert = GST_GL_VIEW_CONVERT_ELEMENT (object);
switch (prop_id) {
case PROP_INPUT_LAYOUT:
case PROP_INPUT_FLAGS:
case PROP_OUTPUT_LAYOUT:
case PROP_OUTPUT_FLAGS:
case PROP_OUTPUT_DOWNMIX_MODE:
g_object_get_property (G_OBJECT (convert->viewconvert), pspec->name,
value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstFlowReturn
gst_gl_view_convert_element_submit_input_buffer (GstBaseTransform * trans,
gboolean is_discont, GstBuffer * input)
{
GstGLContext *context = GST_GL_BASE_FILTER (trans)->context;
GstGLViewConvertElement *viewconvert_filter =
GST_GL_VIEW_CONVERT_ELEMENT (trans);
GstFlowReturn ret;
ret =
GST_BASE_TRANSFORM_CLASS (parent_class)->submit_input_buffer (trans,
is_discont, input);
if (ret != GST_FLOW_OK || trans->queued_buf == NULL)
return ret;
gst_gl_view_convert_set_context (viewconvert_filter->viewconvert, context);
/* Takes the ref to the input buffer */
ret =
gst_gl_view_convert_submit_input_buffer (viewconvert_filter->viewconvert,
is_discont, input);
trans->queued_buf = NULL;
return ret;
}
static GstFlowReturn
gst_gl_view_convert_element_generate_output_buffer (GstBaseTransform * bt,
GstBuffer ** outbuf_ptr)
{
GstGLFilter *filter = GST_GL_FILTER (bt);
GstGLViewConvertElement *viewconvert_filter =
GST_GL_VIEW_CONVERT_ELEMENT (bt);
GstFlowReturn ret = GST_FLOW_OK;
ret = gst_gl_view_convert_get_output (viewconvert_filter->viewconvert,
outbuf_ptr);
if (ret != GST_FLOW_OK) {
GST_ELEMENT_ERROR (filter, RESOURCE, SETTINGS,
("failed to perform view conversion on input buffer"), (NULL));
return ret;
}
return ret;
}

53
ext/gl/gstglviewconvert.h Normal file
View file

@ -0,0 +1,53 @@
/*
* GStreamer
* Copyright (C) 2014 Jan Schmidt <jan@centricular.com>
* Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
*
* 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.
*/
#ifndef _GST_GL_VIEW_CONVERT_ELEMENT_H_
#define _GST_GL_VIEW_CONVERT_ELEMENT_H_
#include <gst/gl/gstglviewconvert.h>
G_BEGIN_DECLS
#define GST_TYPE_GL_VIEW_CONVERT_ELEMENT (gst_gl_view_convert_element_get_type())
#define GST_GL_VIEW_CONVERT_ELEMENT(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GL_VIEW_CONVERT_ELEMENT,GstGLViewConvertElement))
#define GST_IS_GL_VIEW_CONVERT_ELEMENT(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GL_VIEW_CONVERT_ELEMENT))
#define GST_GL_VIEW_CONVERT_ELEMENT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_GL_VIEW_CONVERT_ELEMENT,GstGLViewConvertElementClass))
#define GST_IS_GL_VIEW_CONVERT_ELEMENT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_GL_VIEW_CONVERT_ELEMENT))
#define GST_GL_VIEW_CONVERT_ELEMENT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_GL_VIEW_CONVERT_ELEMENT,GstGLViewConvertElementClass))
typedef struct _GstGLViewConvertElement GstGLViewConvertElement;
typedef struct _GstGLViewConvertElementClass GstGLViewConvertElementClass;
struct _GstGLViewConvertElement
{
GstGLFilter filter;
GstGLViewConvert *viewconvert;
};
struct _GstGLViewConvertElementClass
{
GstGLFilterClass filter_class;
};
GType gst_gl_view_convert_element_get_type (void);
G_END_DECLS
#endif /* _GST_GL_VIEW_CONVERT_H_ */

17
ext/gl/gstopengl.c
View file

@ -58,6 +58,9 @@
#include "gstglvideomixer.h"
#include "gstglfiltershader.h"
#include "gstglfilterapp.h"
#include "gstglstereosplit.h"
#include "gstglstereomix.h"
#if HAVE_GRAPHENE
#include "gstgltransformation.h"
#endif
@ -72,6 +75,7 @@
#include "gstglfilterglass.h"
/* #include "gstglfilterreflectedscreen.h" */
#include "gstgldeinterlace.h"
#include "gstglviewconvert.h"
#include "gstglmosaic.h"
#if HAVE_PNG
#include "gstgldifferencematte.h"
@ -203,6 +207,14 @@ plugin_init (GstPlugin * plugin)
}
#endif /* HAVE_PNG */
#endif /* HAVE_JPEG */
if (!gst_element_register (plugin, "glstereosplit",
GST_RANK_NONE, GST_TYPE_GL_STEREOSPLIT)) {
return FALSE;
}
if (!gst_element_register (plugin, "glstereomix",
GST_RANK_NONE, GST_TYPE_GL_STEREO_MIX)) {
return FALSE;
}
#if GST_GL_HAVE_OPENGL
if (!gst_element_register (plugin, "gltestsrc",
GST_RANK_NONE, GST_TYPE_GL_TEST_SRC)) {
@ -224,6 +236,11 @@ plugin_init (GstPlugin * plugin)
return FALSE;
}
if (!gst_element_register (plugin, "glviewconvert",
GST_RANK_NONE, GST_TYPE_GL_VIEW_CONVERT_ELEMENT)) {
return FALSE;
}
if (!gst_element_register (plugin, "glmosaic",
GST_RANK_NONE, GST_TYPE_GL_MOSAIC)) {
return FALSE;