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mutter/cogl-gst/cogl-gst-video-sink.c
Lionel Landwerlin 69247c10f3 cogl-gst: emit ready signal on sink only after the first frame is uploaded 
Developers listening to the 'ready' signal on CoglGstVideoSink might
call process the current frame once the signal is triggered. We need
to ensure the first frame has been uploaded before letting people know
that the sink is ready.

Reviewed-by: Robert Bragg <robert@linux.intel.com>

(cherry picked from commit 53882aa0728c5540d8452045006a763e29d4306d)
2013-08-19 22:44:45 +01:00

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/*
* Cogl-GStreamer.
*
* GStreamer integration library for Cogl.
*
* cogl-gst-video-sink.c - Gstreamer Video Sink that renders to a
* Cogl Pipeline.
*
* Authored by Jonathan Matthew <jonathan@kaolin.wh9.net>,
* Chris Lord <chris@openedhand.com>
* Damien Lespiau <damien.lespiau@intel.com>
* Matthew Allum <mallum@openedhand.com>
* Plamena Manolova <plamena.n.manolova@intel.com>
*
* Copyright (C) 2007, 2008 OpenedHand
* Copyright (C) 2009, 2010, 2013 Intel Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/gstvalue.h>
#include <gst/video/video.h>
#include <gst/riff/riff-ids.h>
#include <cogl/cogl.h>
#include <string.h>
#include "cogl-gst-video-sink.h"
#define COGL_GST_DEFAULT_PRIORITY G_PRIORITY_HIGH_IDLE
#define BASE_SINK_CAPS "{ AYUV," \
"YV12," \
"I420," \
"RGBA," \
"BGRA," \
"RGB," \
"BGR }"
#define SINK_CAPS GST_VIDEO_CAPS_MAKE (BASE_SINK_CAPS)
#define COGL_GST_PARAM_STATIC \
(G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK | G_PARAM_STATIC_BLURB)
#define COGL_GST_PARAM_READABLE \
(G_PARAM_READABLE | COGL_GST_PARAM_STATIC)
#define COGL_GST_PARAM_WRITABLE \
(G_PARAM_WRITABLE | COGL_GST_PARAM_STATIC)
#define COGL_GST_PARAM_READWRITE \
(G_PARAM_READABLE | G_PARAM_WRITABLE | COGL_GST_PARAM_STATIC)
static GstStaticPadTemplate sinktemplate_all =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (SINK_CAPS));
G_DEFINE_TYPE (CoglGstVideoSink, cogl_gst_video_sink, GST_TYPE_BASE_SINK);
enum
{
PROP_0,
PROP_UPDATE_PRIORITY
};
enum
{
PIPELINE_READY_SIGNAL,
NEW_FRAME_SIGNAL,
LAST_SIGNAL
};
static guint video_sink_signals[LAST_SIGNAL] = { 0, };
typedef enum
{
COGL_GST_NOFORMAT,
COGL_GST_RGB32,
COGL_GST_RGB24,
COGL_GST_AYUV,
COGL_GST_YV12,
COGL_GST_SURFACE,
COGL_GST_I420
} CoglGstVideoFormat;
typedef enum
{
COGL_GST_RENDERER_NEEDS_GLSL = (1 << 0)
} CoglGstRendererFlag;
/* We want to cache the snippets instead of recreating a new one every
* time we initialise a pipeline so that if we end up recreating the
* same pipeline again then Cogl will be able to use the pipeline
* cache to avoid linking a redundant identical shader program */
typedef struct
{
CoglSnippet *vertex_snippet;
CoglSnippet *fragment_snippet;
CoglSnippet *default_sample_snippet;
int start_position;
} SnippetCacheEntry;
typedef struct
{
GQueue entries;
} SnippetCache;
typedef struct _CoglGstSource
{
GSource source;
CoglGstVideoSink *sink;
GMutex buffer_lock;
GstBuffer *buffer;
CoglBool has_new_caps;
} CoglGstSource;
typedef void (CoglGstRendererPaint) (CoglGstVideoSink *);
typedef void (CoglGstRendererPostPaint) (CoglGstVideoSink *);
typedef struct _CoglGstRenderer
{
const char *name;
CoglGstVideoFormat format;
int flags;
GstStaticCaps caps;
int n_layers;
void (*setup_pipeline) (CoglGstVideoSink *sink,
CoglPipeline *pipeline);
CoglBool (*upload) (CoglGstVideoSink *sink,
GstBuffer *buffer);
} CoglGstRenderer;
struct _CoglGstVideoSinkPrivate
{
CoglContext *ctx;
CoglPipeline *pipeline;
CoglTexture *frame[3];
CoglBool frame_dirty;
CoglGstVideoFormat format;
CoglBool bgr;
CoglGstSource *source;
GSList *renderers;
GstCaps *caps;
CoglGstRenderer *renderer;
GstFlowReturn flow_return;
int custom_start;
int free_layer;
CoglBool default_sample;
GstVideoInfo info;
};
static void
cogl_gst_source_finalize (GSource *source)
{
CoglGstSource *gst_source = (CoglGstSource *) source;
g_mutex_lock (&gst_source->buffer_lock);
if (gst_source->buffer)
gst_buffer_unref (gst_source->buffer);
gst_source->buffer = NULL;
g_mutex_unlock (&gst_source->buffer_lock);
g_mutex_clear (&gst_source->buffer_lock);
}
int
cogl_gst_video_sink_get_free_layer (CoglGstVideoSink *sink)
{
return sink->priv->free_layer;
}
void
cogl_gst_video_sink_attach_frame (CoglGstVideoSink *sink,
CoglPipeline *pln)
{
CoglGstVideoSinkPrivate *priv = sink->priv;
int i;
for (i = 0; i < G_N_ELEMENTS (priv->frame); i++)
if (priv->frame[i] != NULL)
cogl_pipeline_set_layer_texture (pln, i + priv->custom_start,
COGL_TEXTURE (priv->frame[i]));
}
static CoglBool
cogl_gst_source_prepare (GSource *source,
int *timeout)
{
CoglGstSource *gst_source = (CoglGstSource *) source;
*timeout = -1;
return gst_source->buffer != NULL;
}
static CoglBool
cogl_gst_source_check (GSource *source)
{
CoglGstSource *gst_source = (CoglGstSource *) source;
return gst_source->buffer != NULL;
}
static void
cogl_gst_video_sink_set_priority (CoglGstVideoSink *sink,
int priority)
{
if (sink->priv->source)
g_source_set_priority ((GSource *) sink->priv->source, priority);
}
static void
dirty_default_pipeline (CoglGstVideoSink *sink)
{
CoglGstVideoSinkPrivate *priv = sink->priv;
if (priv->pipeline)
{
cogl_object_unref (priv->pipeline);
priv->pipeline = NULL;
}
}
void
cogl_gst_video_sink_set_first_layer (CoglGstVideoSink *sink,
int first_layer)
{
g_return_if_fail (COGL_GST_IS_VIDEO_SINK (sink));
if (first_layer != sink->priv->custom_start)
{
sink->priv->custom_start = first_layer;
dirty_default_pipeline (sink);
if (sink->priv->renderer)
sink->priv->free_layer = (sink->priv->custom_start +
sink->priv->renderer->n_layers);
}
}
void
cogl_gst_video_sink_set_default_sample (CoglGstVideoSink *sink,
CoglBool default_sample)
{
g_return_if_fail (COGL_GST_IS_VIDEO_SINK (sink));
if (default_sample != sink->priv->default_sample)
{
sink->priv->default_sample = default_sample;
dirty_default_pipeline (sink);
}
}
void
cogl_gst_video_sink_setup_pipeline (CoglGstVideoSink *sink,
CoglPipeline *pipeline)
{
g_return_if_fail (COGL_GST_IS_VIDEO_SINK (sink));
if (sink->priv->renderer)
sink->priv->renderer->setup_pipeline (sink, pipeline);
}
static SnippetCacheEntry *
get_cache_entry (CoglGstVideoSink *sink,
SnippetCache *cache)
{
CoglGstVideoSinkPrivate *priv = sink->priv;
GList *l;
for (l = cache->entries.head; l; l = l->next)
{
SnippetCacheEntry *entry = l->data;
if (entry->start_position == priv->custom_start)
return entry;
}
return NULL;
}
static SnippetCacheEntry *
add_cache_entry (CoglGstVideoSink *sink,
SnippetCache *cache,
const char *decl)
{
CoglGstVideoSinkPrivate *priv = sink->priv;
SnippetCacheEntry *entry = g_slice_new (SnippetCacheEntry);
char *default_source;
entry->start_position = priv->custom_start;
entry->vertex_snippet =
cogl_snippet_new (COGL_SNIPPET_HOOK_VERTEX_GLOBALS,
decl,
NULL /* post */);
entry->fragment_snippet =
cogl_snippet_new (COGL_SNIPPET_HOOK_FRAGMENT_GLOBALS,
decl,
NULL /* post */);
default_source =
g_strdup_printf (" cogl_layer *= cogl_gst_sample_video%i "
"(cogl_tex_coord%i_in.st);\n",
priv->custom_start,
priv->custom_start);
entry->default_sample_snippet =
cogl_snippet_new (COGL_SNIPPET_HOOK_LAYER_FRAGMENT,
NULL, /* declarations */
default_source);
g_free (default_source);
g_queue_push_head (&cache->entries, entry);
return entry;
}
static void
setup_pipeline_from_cache_entry (CoglGstVideoSink *sink,
CoglPipeline *pipeline,
SnippetCacheEntry *cache_entry,
int n_layers)
{
CoglGstVideoSinkPrivate *priv = sink->priv;
if (cache_entry)
{
int i;
/* The global sampling function gets added to both the fragment
* and vertex stages. The hope is that the GLSL compiler will
* easily remove the dead code if it's not actually used */
cogl_pipeline_add_snippet (pipeline, cache_entry->vertex_snippet);
cogl_pipeline_add_snippet (pipeline, cache_entry->fragment_snippet);
/* Set all of the layers to just directly copy from the previous
* layer so that it won't redundantly generate code to sample
* the intermediate textures */
for (i = 0; i < n_layers; i++)
cogl_pipeline_set_layer_combine (pipeline,
priv->custom_start + i,
"RGBA=REPLACE(PREVIOUS)",
NULL);
if (priv->default_sample)
cogl_pipeline_add_layer_snippet (pipeline,
priv->custom_start + n_layers - 1,
cache_entry->default_sample_snippet);
}
priv->frame_dirty = TRUE;
}
CoglPipeline *
cogl_gst_video_sink_get_pipeline (CoglGstVideoSink *vt)
{
CoglGstVideoSinkPrivate *priv;
g_return_val_if_fail (COGL_GST_IS_VIDEO_SINK (vt), NULL);
priv = vt->priv;
if (priv->pipeline == NULL)
{
priv->pipeline = cogl_pipeline_new (priv->ctx);
cogl_gst_video_sink_setup_pipeline (vt, priv->pipeline);
cogl_gst_video_sink_attach_frame (vt, priv->pipeline);
priv->frame_dirty = FALSE;
}
else if (priv->frame_dirty)
{
CoglPipeline *pipeline = cogl_pipeline_copy (priv->pipeline);
cogl_object_unref (priv->pipeline);
priv->pipeline = pipeline;
cogl_gst_video_sink_attach_frame (vt, pipeline);
priv->frame_dirty = FALSE;
}
return priv->pipeline;
}
static void
clear_frame_textures (CoglGstVideoSink *sink)
{
CoglGstVideoSinkPrivate *priv = sink->priv;
int i;
for (i = 0; i < G_N_ELEMENTS (priv->frame); i++)
{
if (priv->frame[i] == NULL)
break;
else
cogl_object_unref (priv->frame[i]);
}
memset (priv->frame, 0, sizeof (priv->frame));
priv->frame_dirty = TRUE;
}
static void
cogl_gst_rgb_setup_pipeline (CoglGstVideoSink *sink,
CoglPipeline *pipeline)
{
CoglGstVideoSinkPrivate *priv = sink->priv;
if (cogl_has_feature (priv->ctx, COGL_FEATURE_ID_GLSL))
{
static SnippetCache snippet_cache;
SnippetCacheEntry *entry = get_cache_entry (sink, &snippet_cache);
if (entry == NULL)
{
char *source;
source =
g_strdup_printf ("vec4\n"
"cogl_gst_sample_video%i (vec2 UV)\n"
"{\n"
" return texture2D (cogl_sampler%i, UV);\n"
"}\n",
priv->custom_start,
priv->custom_start);
setup_pipeline_from_cache_entry (sink, pipeline, entry, 1);
g_free (source);
}
}
else
setup_pipeline_from_cache_entry (sink, pipeline, NULL, 1);
}
static inline CoglBool
is_pot (unsigned int number)
{
/* Make sure there is only one bit set */
return (number & (number - 1)) == 0;
}
/* This first tries to upload the texture to a CoglTexture2D, but
* if that's not possible it falls back to a CoglTexture2DSliced.
*
* Auto-mipmapping of any uploaded texture is disabled
*/
static CoglTexture *
video_texture_new_from_data (CoglContext *ctx,
int width,
int height,
CoglPixelFormat format,
CoglPixelFormat internal_format,
int rowstride,
const uint8_t *data,
CoglError **error)
{
CoglBitmap *bitmap;
CoglTexture *tex;
CoglError *internal_error = NULL;
bitmap = cogl_bitmap_new_for_data (ctx,
width, height,
format,
rowstride,
(uint8_t *) data);
if ((is_pot (cogl_bitmap_get_width (bitmap)) &&
is_pot (cogl_bitmap_get_height (bitmap))) ||
cogl_has_feature (ctx, COGL_FEATURE_ID_TEXTURE_NPOT_BASIC))
{
tex = COGL_TEXTURE (cogl_texture_2d_new_from_bitmap (bitmap,
internal_format,
&internal_error));
if (!tex)
{
cogl_error_free (internal_error);
internal_error = NULL;
}
}
else
tex = NULL;
if (!tex)
{
/* Otherwise create a sliced texture */
CoglTexture2DSliced *tex_2ds =
cogl_texture_2d_sliced_new_from_bitmap (bitmap,
-1, /* no maximum waste */
internal_format,
error);
tex = COGL_TEXTURE (tex_2ds);
}
cogl_object_unref (bitmap);
return tex;
}
static CoglBool
cogl_gst_rgb24_upload (CoglGstVideoSink *sink,
GstBuffer *buffer)
{
CoglGstVideoSinkPrivate *priv = sink->priv;
CoglPixelFormat format;
GstVideoFrame frame;
if (priv->bgr)
format = COGL_PIXEL_FORMAT_BGR_888;
else
format = COGL_PIXEL_FORMAT_RGB_888;
if (!gst_video_frame_map (&frame, &priv->info, buffer, GST_MAP_READ))
goto map_fail;
clear_frame_textures (sink);
priv->frame[0] = video_texture_new_from_data (priv->ctx, priv->info.width,
priv->info.height,
format, format,
priv->info.stride[0],
frame.data[0], NULL);
gst_video_frame_unmap (&frame);
return TRUE;
map_fail:
{
GST_ERROR_OBJECT (sink, "Could not map incoming video frame");
return FALSE;
}
}
static CoglGstRenderer rgb24_renderer =
{
"RGB 24",
COGL_GST_RGB24,
0,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGB, BGR }")),
1, /* n_layers */
cogl_gst_rgb_setup_pipeline,
cogl_gst_rgb24_upload,
};
static CoglBool
cogl_gst_rgb32_upload (CoglGstVideoSink *sink,
GstBuffer *buffer)
{
CoglGstVideoSinkPrivate *priv = sink->priv;
CoglPixelFormat format;
GstVideoFrame frame;
if (priv->bgr)
format = COGL_PIXEL_FORMAT_BGRA_8888;
else
format = COGL_PIXEL_FORMAT_RGBA_8888;
if (!gst_video_frame_map (&frame, &priv->info, buffer, GST_MAP_READ))
goto map_fail;
clear_frame_textures (sink);
priv->frame[0] = video_texture_new_from_data (priv->ctx, priv->info.width,
priv->info.height,
format, format,
priv->info.stride[0],
frame.data[0], NULL);
gst_video_frame_unmap (&frame);
return TRUE;
map_fail:
{
GST_ERROR_OBJECT (sink, "Could not map incoming video frame");
return FALSE;
}
}
static CoglGstRenderer rgb32_renderer =
{
"RGB 32",
COGL_GST_RGB32,
0,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGBA, BGRA }")),
1, /* n_layers */
cogl_gst_rgb_setup_pipeline,
cogl_gst_rgb32_upload,
};
static CoglBool
cogl_gst_yv12_upload (CoglGstVideoSink *sink,
GstBuffer *buffer)
{
CoglGstVideoSinkPrivate *priv = sink->priv;
GstVideoFrame frame;
CoglPixelFormat format = COGL_PIXEL_FORMAT_A_8;
if (!gst_video_frame_map (&frame, &priv->info, buffer, GST_MAP_READ))
goto map_fail;
clear_frame_textures (sink);
priv->frame[0] =
video_texture_new_from_data (priv->ctx,
GST_VIDEO_INFO_COMP_WIDTH (&priv->info, 0),
GST_VIDEO_INFO_COMP_HEIGHT (&priv->info, 0),
format, format,
priv->info.stride[0], frame.data[0], NULL);
priv->frame[1] =
video_texture_new_from_data (priv->ctx,
GST_VIDEO_INFO_COMP_WIDTH (&priv->info, 1),
GST_VIDEO_INFO_COMP_HEIGHT (&priv->info, 1),
format, format,
priv->info.stride[1], frame.data[1], NULL);
priv->frame[2] =
video_texture_new_from_data (priv->ctx,
GST_VIDEO_INFO_COMP_WIDTH (&priv->info, 2),
GST_VIDEO_INFO_COMP_HEIGHT (&priv->info, 2),
format, format,
priv->info.stride[2], frame.data[2], NULL);
gst_video_frame_unmap (&frame);
return TRUE;
map_fail:
{
GST_ERROR_OBJECT (sink, "Could not map incoming video frame");
return FALSE;
}
}
static void
cogl_gst_yv12_glsl_setup_pipeline (CoglGstVideoSink *sink,
CoglPipeline *pipeline)
{
CoglGstVideoSinkPrivate *priv = sink->priv;
static SnippetCache snippet_cache;
SnippetCacheEntry *entry;
entry = get_cache_entry (sink, &snippet_cache);
if (entry == NULL)
{
char *source;
source =
g_strdup_printf ("vec4\n"
"cogl_gst_sample_video%i (vec2 UV)\n"
"{\n"
" float y = 1.1640625 * "
"(texture2D (cogl_sampler%i, UV).a - 0.0625);\n"
" float u = texture2D (cogl_sampler%i, UV).a - 0.5;\n"
" float v = texture2D (cogl_sampler%i, UV).a - 0.5;\n"
" vec4 color;\n"
" color.r = y + 1.59765625 * v;\n"
" color.g = y - 0.390625 * u - 0.8125 * v;\n"
" color.b = y + 2.015625 * u;\n"
" color.a = 1.0;\n"
" return color;\n"
"}\n",
priv->custom_start,
priv->custom_start,
priv->custom_start + 1,
priv->custom_start + 2);
entry = add_cache_entry (sink, &snippet_cache, source);
g_free (source);
}
setup_pipeline_from_cache_entry (sink, pipeline, entry, 3);
}
static CoglGstRenderer yv12_glsl_renderer =
{
"YV12 glsl",
COGL_GST_YV12,
COGL_GST_RENDERER_NEEDS_GLSL,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("YV12")),
3, /* n_layers */
cogl_gst_yv12_glsl_setup_pipeline,
cogl_gst_yv12_upload,
};
static CoglGstRenderer i420_glsl_renderer =
{
"I420 glsl",
COGL_GST_I420,
COGL_GST_RENDERER_NEEDS_GLSL,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("I420")),
3, /* n_layers */
cogl_gst_yv12_glsl_setup_pipeline,
cogl_gst_yv12_upload,
};
static void
cogl_gst_ayuv_glsl_setup_pipeline (CoglGstVideoSink *sink,
CoglPipeline *pipeline)
{
CoglGstVideoSinkPrivate *priv = sink->priv;
static SnippetCache snippet_cache;
SnippetCacheEntry *entry;
entry = get_cache_entry (sink, &snippet_cache);
if (entry == NULL)
{
char *source;
source
= g_strdup_printf ("vec4\n"
"cogl_gst_sample_video%i (vec2 UV)\n"
"{\n"
" vec4 color = texture2D (cogl_sampler%i, UV);\n"
" float y = 1.1640625 * (color.g - 0.0625);\n"
" float u = color.b - 0.5;\n"
" float v = color.a - 0.5;\n"
" color.a = color.r;\n"
" color.r = y + 1.59765625 * v;\n"
" color.g = y - 0.390625 * u - 0.8125 * v;\n"
" color.b = y + 2.015625 * u;\n"
" return color;\n"
"}\n", priv->custom_start,
priv->custom_start);
entry = add_cache_entry (sink, &snippet_cache, source);
g_free (source);
}
setup_pipeline_from_cache_entry (sink, pipeline, entry, 3);
}
static CoglBool
cogl_gst_ayuv_upload (CoglGstVideoSink *sink,
GstBuffer *buffer)
{
CoglGstVideoSinkPrivate *priv = sink->priv;
CoglPixelFormat format = COGL_PIXEL_FORMAT_RGBA_8888;
GstVideoFrame frame;
if (!gst_video_frame_map (&frame, &priv->info, buffer, GST_MAP_READ))
goto map_fail;
clear_frame_textures (sink);
priv->frame[0] = video_texture_new_from_data (priv->ctx, priv->info.width,
priv->info.height,
format, format,
priv->info.stride[0],
frame.data[0], NULL);
gst_video_frame_unmap (&frame);
return TRUE;
map_fail:
{
GST_ERROR_OBJECT (sink, "Could not map incoming video frame");
return FALSE;
}
}
static CoglGstRenderer ayuv_glsl_renderer =
{
"AYUV glsl",
COGL_GST_AYUV,
COGL_GST_RENDERER_NEEDS_GLSL,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("AYUV")),
3, /* n_layers */
cogl_gst_ayuv_glsl_setup_pipeline,
cogl_gst_ayuv_upload,
};
static GSList*
cogl_gst_build_renderers_list (CoglContext *ctx)
{
GSList *list = NULL;
CoglBool has_glsl;
int i;
static CoglGstRenderer *const renderers[] =
{
&rgb24_renderer,
&rgb32_renderer,
&yv12_glsl_renderer,
&i420_glsl_renderer,
&ayuv_glsl_renderer,
NULL
};
has_glsl = cogl_has_feature (ctx, COGL_FEATURE_ID_GLSL);
for (i = 0; renderers[i]; i++)
if (has_glsl || !(renderers[i]->flags & COGL_GST_RENDERER_NEEDS_GLSL))
list = g_slist_prepend (list, renderers[i]);
return list;
}
static void
append_cap (gpointer data,
gpointer user_data)
{
CoglGstRenderer *renderer = (CoglGstRenderer *) data;
GstCaps *caps = (GstCaps *) user_data;
GstCaps *writable_caps;
writable_caps =
gst_caps_make_writable (gst_static_caps_get (&renderer->caps));
gst_caps_append (caps, writable_caps);
}
static GstCaps *
cogl_gst_build_caps (GSList *renderers)
{
GstCaps *caps;
caps = gst_caps_new_empty ();
g_slist_foreach (renderers, append_cap, caps);
return caps;
}
void
cogl_gst_video_sink_set_context (CoglGstVideoSink *vt,
CoglContext *ctx)
{
CoglGstVideoSinkPrivate *priv = vt->priv;
if (ctx)
ctx = cogl_object_ref (ctx);
if (priv->ctx)
{
cogl_object_unref (priv->ctx);
g_slist_free (priv->renderers);
priv->renderers = NULL;
if (priv->caps)
{
gst_caps_unref (priv->caps);
priv->caps = NULL;
}
}
if (ctx)
{
priv->ctx = ctx;
priv->renderers = cogl_gst_build_renderers_list (priv->ctx);
priv->caps = cogl_gst_build_caps (priv->renderers);
}
}
static CoglGstRenderer *
cogl_gst_find_renderer_by_format (CoglGstVideoSink *sink,
CoglGstVideoFormat format)
{
CoglGstVideoSinkPrivate *priv = sink->priv;
CoglGstRenderer *renderer = NULL;
GSList *element;
for (element = priv->renderers; element; element = g_slist_next (element))
{
CoglGstRenderer *candidate = (CoglGstRenderer *) element->data;
if (candidate->format == format)
{
renderer = candidate;
break;
}
}
return renderer;
}
static GstCaps *
cogl_gst_video_sink_get_caps (GstBaseSink *bsink,
GstCaps *filter)
{
CoglGstVideoSink *sink;
sink = COGL_GST_VIDEO_SINK (bsink);
return gst_caps_ref (sink->priv->caps);
}
static CoglBool
cogl_gst_video_sink_parse_caps (GstCaps *caps,
CoglGstVideoSink *sink,
CoglBool save)
{
CoglGstVideoSinkPrivate *priv = sink->priv;
GstCaps *intersection;
GstVideoInfo vinfo;
CoglGstVideoFormat format;
CoglBool bgr = FALSE;
CoglGstRenderer *renderer;
intersection = gst_caps_intersect (priv->caps, caps);
if (gst_caps_is_empty (intersection))
goto no_intersection;
gst_caps_unref (intersection);
if (!gst_video_info_from_caps (&vinfo, caps))
goto unknown_format;
switch (vinfo.finfo->format)
{
case GST_VIDEO_FORMAT_YV12:
format = COGL_GST_YV12;
break;
case GST_VIDEO_FORMAT_I420:
format = COGL_GST_I420;
break;
case GST_VIDEO_FORMAT_AYUV:
format = COGL_GST_AYUV;
bgr = FALSE;
break;
case GST_VIDEO_FORMAT_RGB:
format = COGL_GST_RGB24;
bgr = FALSE;
break;
case GST_VIDEO_FORMAT_BGR:
format = COGL_GST_RGB24;
bgr = TRUE;
break;
case GST_VIDEO_FORMAT_RGBA:
format = COGL_GST_RGB32;
bgr = FALSE;
break;
case GST_VIDEO_FORMAT_BGRA:
format = COGL_GST_RGB32;
bgr = TRUE;
break;
default:
goto unhandled_format;
}
renderer = cogl_gst_find_renderer_by_format (sink, format);
if (G_UNLIKELY (renderer == NULL))
goto no_suitable_renderer;
GST_INFO_OBJECT (sink, "found the %s renderer", renderer->name);
if (save)
{
priv->info = vinfo;
priv->format = format;
priv->bgr = bgr;
priv->renderer = renderer;
}
return TRUE;
no_intersection:
{
GST_WARNING_OBJECT (sink,
"Incompatible caps, don't intersect with %" GST_PTR_FORMAT, priv->caps);
return FALSE;
}
unknown_format:
{
GST_WARNING_OBJECT (sink, "Could not figure format of input caps");
return FALSE;
}
unhandled_format:
{
GST_ERROR_OBJECT (sink, "Provided caps aren't supported by clutter-gst");
return FALSE;
}
no_suitable_renderer:
{
GST_ERROR_OBJECT (sink, "could not find a suitable renderer");
return FALSE;
}
}
static CoglBool
cogl_gst_video_sink_set_caps (GstBaseSink *bsink,
GstCaps *caps)
{
CoglGstVideoSink *sink;
CoglGstVideoSinkPrivate *priv;
sink = COGL_GST_VIDEO_SINK (bsink);
priv = sink->priv;
if (!cogl_gst_video_sink_parse_caps (caps, sink, FALSE))
return FALSE;
g_mutex_lock (&priv->source->buffer_lock);
priv->source->has_new_caps = TRUE;
g_mutex_unlock (&priv->source->buffer_lock);
return TRUE;
}
static CoglBool
cogl_gst_source_dispatch (GSource *source,
GSourceFunc callback,
void *user_data)
{
CoglGstSource *gst_source= (CoglGstSource*) source;
CoglGstVideoSinkPrivate *priv = gst_source->sink->priv;
GstBuffer *buffer;
gboolean pipeline_ready = FALSE;
g_mutex_lock (&gst_source->buffer_lock);
if (G_UNLIKELY (gst_source->has_new_caps))
{
GstCaps *caps =
gst_pad_get_current_caps (GST_BASE_SINK_PAD ((GST_BASE_SINK
(gst_source->sink))));
if (!cogl_gst_video_sink_parse_caps (caps, gst_source->sink, TRUE))
goto negotiation_fail;
gst_source->has_new_caps = FALSE;
priv->free_layer = priv->custom_start + priv->renderer->n_layers;
dirty_default_pipeline (gst_source->sink);
/* We are now in a state where we could generate the pipeline if
* the application requests it so we can emit the signal.
* However we'll actually generate the pipeline lazily only if
* the application actually asks for it. */
pipeline_ready = TRUE;
}
buffer = gst_source->buffer;
gst_source->buffer = NULL;
g_mutex_unlock (&gst_source->buffer_lock);
if (buffer)
{
if (!priv->renderer->upload (gst_source->sink, buffer))
goto fail_upload;
gst_buffer_unref (buffer);
}
else
GST_WARNING_OBJECT (gst_source->sink, "No buffers available for display");
if (G_UNLIKELY (pipeline_ready))
g_signal_emit (gst_source->sink,
video_sink_signals[PIPELINE_READY_SIGNAL],
0 /* detail */);
g_signal_emit (gst_source->sink,
video_sink_signals[NEW_FRAME_SIGNAL], 0,
NULL);
return TRUE;
negotiation_fail:
{
GST_WARNING_OBJECT (gst_source->sink,
"Failed to handle caps. Stopping GSource");
priv->flow_return = GST_FLOW_NOT_NEGOTIATED;
g_mutex_unlock (&gst_source->buffer_lock);
return FALSE;
}
fail_upload:
{
GST_WARNING_OBJECT (gst_source->sink, "Failed to upload buffer");
priv->flow_return = GST_FLOW_ERROR;
gst_buffer_unref (buffer);
return FALSE;
}
}
static GSourceFuncs gst_source_funcs =
{
cogl_gst_source_prepare,
cogl_gst_source_check,
cogl_gst_source_dispatch,
cogl_gst_source_finalize
};
static CoglGstSource *
cogl_gst_source_new (CoglGstVideoSink *sink)
{
GSource *source;
CoglGstSource *gst_source;
source = g_source_new (&gst_source_funcs, sizeof (CoglGstSource));
gst_source = (CoglGstSource *) source;
g_source_set_can_recurse (source, TRUE);
g_source_set_priority (source, COGL_GST_DEFAULT_PRIORITY);
gst_source->sink = sink;
g_mutex_init (&gst_source->buffer_lock);
gst_source->buffer = NULL;
return gst_source;
}
static void
cogl_gst_video_sink_init (CoglGstVideoSink *sink)
{
CoglGstVideoSinkPrivate *priv;
sink->priv = priv = G_TYPE_INSTANCE_GET_PRIVATE (sink,
COGL_GST_TYPE_VIDEO_SINK,
CoglGstVideoSinkPrivate);
priv->custom_start = 0;
priv->default_sample = TRUE;
}
static GstFlowReturn
_cogl_gst_video_sink_render (GstBaseSink *bsink,
GstBuffer *buffer)
{
CoglGstVideoSink *sink = COGL_GST_VIDEO_SINK (bsink);
CoglGstVideoSinkPrivate *priv = sink->priv;
CoglGstSource *gst_source = priv->source;
g_mutex_lock (&gst_source->buffer_lock);
if (G_UNLIKELY (priv->flow_return != GST_FLOW_OK))
goto dispatch_flow_ret;
if (gst_source->buffer)
gst_buffer_unref (gst_source->buffer);
gst_source->buffer = gst_buffer_ref (buffer);
g_mutex_unlock (&gst_source->buffer_lock);
g_main_context_wakeup (NULL);
return GST_FLOW_OK;
dispatch_flow_ret:
{
g_mutex_unlock (&gst_source->buffer_lock);
return priv->flow_return;
}
}
static void
cogl_gst_video_sink_dispose (GObject *object)
{
CoglGstVideoSink *self;
CoglGstVideoSinkPrivate *priv;
self = COGL_GST_VIDEO_SINK (object);
priv = self->priv;
clear_frame_textures (self);
if (priv->pipeline)
{
cogl_object_unref (priv->pipeline);
priv->pipeline = NULL;
}
if (priv->caps)
{
gst_caps_unref (priv->caps);
priv->caps = NULL;
}
G_OBJECT_CLASS (cogl_gst_video_sink_parent_class)->dispose (object);
}
static void
cogl_gst_video_sink_finalize (GObject *object)
{
CoglGstVideoSink *self = COGL_GST_VIDEO_SINK (object);
cogl_gst_video_sink_set_context (self, NULL);
G_OBJECT_CLASS (cogl_gst_video_sink_parent_class)->finalize (object);
}
static CoglBool
cogl_gst_video_sink_start (GstBaseSink *base_sink)
{
CoglGstVideoSink *sink = COGL_GST_VIDEO_SINK (base_sink);
CoglGstVideoSinkPrivate *priv = sink->priv;
priv->source = cogl_gst_source_new (sink);
g_source_attach ((GSource *) priv->source, NULL);
priv->flow_return = GST_FLOW_OK;
return TRUE;
}
static void
cogl_gst_video_sink_set_property (GObject *object,
unsigned int prop_id,
const GValue *value,
GParamSpec *pspec)
{
CoglGstVideoSink *sink = COGL_GST_VIDEO_SINK (object);
switch (prop_id)
{
case PROP_UPDATE_PRIORITY:
cogl_gst_video_sink_set_priority (sink, g_value_get_int (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
cogl_gst_video_sink_get_property (GObject *object,
unsigned int prop_id,
GValue *value,
GParamSpec *pspec)
{
CoglGstVideoSink *sink = COGL_GST_VIDEO_SINK (object);
CoglGstVideoSinkPrivate *priv = sink->priv;
switch (prop_id)
{
case PROP_UPDATE_PRIORITY:
g_value_set_int (value, g_source_get_priority ((GSource *) priv->source));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static CoglBool
cogl_gst_video_sink_stop (GstBaseSink *base_sink)
{
CoglGstVideoSink *sink = COGL_GST_VIDEO_SINK (base_sink);
CoglGstVideoSinkPrivate *priv = sink->priv;
if (priv->source)
{
GSource *source = (GSource *) priv->source;
g_source_destroy (source);
g_source_unref (source);
priv->source = NULL;
}
return TRUE;
}
static void
cogl_gst_video_sink_class_init (CoglGstVideoSinkClass *klass)
{
GObjectClass *go_class = G_OBJECT_CLASS (klass);
GstBaseSinkClass *gb_class = GST_BASE_SINK_CLASS (klass);
GstElementClass *ge_class = GST_ELEMENT_CLASS (klass);
GstPadTemplate *pad_template;
GParamSpec *pspec;
g_type_class_add_private (klass, sizeof (CoglGstVideoSinkPrivate));
go_class->set_property = cogl_gst_video_sink_set_property;
go_class->get_property = cogl_gst_video_sink_get_property;
go_class->dispose = cogl_gst_video_sink_dispose;
go_class->finalize = cogl_gst_video_sink_finalize;
pad_template = gst_static_pad_template_get (&sinktemplate_all);
gst_element_class_add_pad_template (ge_class, pad_template);
gst_element_class_set_metadata (ge_class,
"Cogl video sink", "Sink/Video",
"Sends video data from GStreamer to a "
"Cogl pipeline",
"Jonathan Matthew <jonathan@kaolin.wh9.net>, "
"Matthew Allum <mallum@o-hand.com, "
"Chris Lord <chris@o-hand.com>, "
"Plamena Manolova "
"<plamena.n.manolova@intel.com>");
gb_class->render = _cogl_gst_video_sink_render;
gb_class->preroll = _cogl_gst_video_sink_render;
gb_class->start = cogl_gst_video_sink_start;
gb_class->stop = cogl_gst_video_sink_stop;
gb_class->set_caps = cogl_gst_video_sink_set_caps;
gb_class->get_caps = cogl_gst_video_sink_get_caps;
pspec = g_param_spec_int ("update-priority",
"Update Priority",
"Priority of video updates in the thread",
-G_MAXINT, G_MAXINT,
COGL_GST_DEFAULT_PRIORITY,
COGL_GST_PARAM_READWRITE);
g_object_class_install_property (go_class, PROP_UPDATE_PRIORITY, pspec);
video_sink_signals[PIPELINE_READY_SIGNAL] =
g_signal_new ("pipeline-ready",
COGL_GST_TYPE_VIDEO_SINK,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (CoglGstVideoSinkClass, pipeline_ready),
NULL, /* accumulator */
NULL, /* accu_data */
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE,
0 /* n_params */);
video_sink_signals[NEW_FRAME_SIGNAL] =
g_signal_new ("new-frame",
COGL_GST_TYPE_VIDEO_SINK,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (CoglGstVideoSinkClass, new_frame),
NULL, /* accumulator */
NULL, /* accu_data */
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE,
0 /* n_params */);
}
CoglGstVideoSink *
cogl_gst_video_sink_new (CoglContext *ctx)
{
CoglGstVideoSink *sink = g_object_new (COGL_GST_TYPE_VIDEO_SINK, NULL);
cogl_gst_video_sink_set_context (sink, ctx);
return sink;
}
float
cogl_gst_video_sink_get_aspect (CoglGstVideoSink *vt)
{
GstVideoInfo *info;
g_return_val_if_fail (COGL_GST_IS_VIDEO_SINK (vt), 0.);
info = &vt->priv->info;
return ((float)info->width * (float)info->par_n) /
((float)info->height * (float)info->par_d);
}
float
cogl_gst_video_sink_get_width_for_height (CoglGstVideoSink *vt,
float height)
{
float aspect;
g_return_val_if_fail (COGL_GST_IS_VIDEO_SINK (vt), 0.);
aspect = cogl_gst_video_sink_get_aspect (vt);
return height * aspect;
}
float
cogl_gst_video_sink_get_height_for_width (CoglGstVideoSink *vt,
float width)
{
float aspect;
g_return_val_if_fail (COGL_GST_IS_VIDEO_SINK (vt), 0.);
aspect = cogl_gst_video_sink_get_aspect (vt);
return width / aspect;
}
void
cogl_gst_video_sink_fit_size (CoglGstVideoSink *vt,
const CoglGstRectangle *available,
CoglGstRectangle *output)
{
g_return_if_fail (COGL_GST_IS_VIDEO_SINK (vt));
g_return_if_fail (available != NULL);
g_return_if_fail (output != NULL);
if (available->height == 0.0f)
{
output->x = available->x;
output->y = available->y;
output->width = output->height = 0;
}
else
{
float available_aspect = available->width / available->height;
float video_aspect = cogl_gst_video_sink_get_aspect (vt);
if (video_aspect > available_aspect)
{
output->width = available->width;
output->height = available->width / video_aspect;
output->x = available->x;
output->y = available->y + (available->height - output->height) / 2;
}
else
{
output->width = available->height * video_aspect;
output->height = available->height;
output->x = available->x + (available->width - output->width) / 2;
output->y = available->y;
}
}
}
CoglBool
cogl_gst_video_sink_is_ready (CoglGstVideoSink *sink)
{
return !!sink->priv->renderer;
}
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