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glimagesink: support video rotation using transform matrix

Browse source 
Add "rotate-method" to glimagesink and apply transform matrix
to vertex coordinate to control rotation.

https://bugzilla.gnome.org/show_bug.cgi?id=765795
This commit is contained in:
Haihua Hu 2016-05-16 20:02:28 +08:00 committed by Tim-Philipp Müller
parent 3548dc5af9
commit 3cf27dd1c8
4 changed files with 279 additions and 10 deletions
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249
ext/gl/gstglimagesink.c
View file

@ -116,6 +116,7 @@ G_DEFINE_TYPE (GstGLImageSinkBin, gst_gl_image_sink_bin, GST_TYPE_GL_SINK_BIN);
enum
{
PROP_BIN_0,
PROP_BIN_ROTATE_METHOD,
PROP_BIN_FORCE_ASPECT_RATIO,
PROP_BIN_PIXEL_ASPECT_RATIO,
PROP_BIN_HANDLE_EVENTS,
@ -177,6 +178,39 @@ _on_client_draw (GstGLImageSink * sink, GstGLContext * context,
return ret;
}
#define DEFAULT_ROTATE_METHOD GST_GL_ROTATE_METHOD_IDENTITY
#define GST_TYPE_GL_ROTATE_METHOD (gst_gl_rotate_method_get_type())
static const GEnumValue rotate_methods[] = {
{GST_GL_ROTATE_METHOD_IDENTITY, "Identity (no rotation)", "none"},
{GST_GL_ROTATE_METHOD_90R, "Rotate clockwise 90 degrees", "clockwise"},
{GST_GL_ROTATE_METHOD_180, "Rotate 180 degrees", "rotate-180"},
{GST_GL_ROTATE_METHOD_90L, "Rotate counter-clockwise 90 degrees",
"counterclockwise"},
{GST_GL_ROTATE_METHOD_FLIP_HORIZ, "Flip horizontally", "horizontal-flip"},
{GST_GL_ROTATE_METHOD_FLIP_VERT, "Flip vertically", "vertical-flip"},
{GST_GL_ROTATE_METHOD_FLIP_UL_LR,
"Flip across upper left/lower right diagonal", "upper-left-diagonal"},
{GST_GL_ROTATE_METHOD_FLIP_UR_LL,
"Flip across upper right/lower left diagonal", "upper-right-diagonal"},
{GST_GL_ROTATE_METHOD_AUTO,
"Select rotate method based on image-orientation tag", "automatic"},
{0, NULL, NULL},
};
static GType
gst_gl_rotate_method_get_type (void)
{
static GType rotate_method_type = 0;
if (!rotate_method_type) {
rotate_method_type = g_enum_register_static ("GstGLRotateMethod",
rotate_methods);
}
return rotate_method_type;
}
static void
gst_gl_image_sink_bin_init (GstGLImageSinkBin * self)
{
@ -199,6 +233,12 @@ gst_gl_image_sink_bin_class_init (GstGLImageSinkBinClass * klass)
gobject_class->set_property = gst_gl_image_sink_bin_set_property;
/* gl sink */
g_object_class_install_property (gobject_class, PROP_BIN_ROTATE_METHOD,
g_param_spec_enum ("rotate-method",
"rotate method",
"rotate method",
GST_TYPE_GL_ROTATE_METHOD, DEFAULT_ROTATE_METHOD,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_BIN_FORCE_ASPECT_RATIO,
g_param_spec_boolean ("force-aspect-ratio",
"Force aspect ratio",
@ -287,6 +327,7 @@ static void gst_glimage_sink_set_property (GObject * object, guint prop_id,
static void gst_glimage_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * param_spec);
static gboolean gst_glimage_sink_event (GstBaseSink * sink, GstEvent * event);
static gboolean gst_glimage_sink_query (GstBaseSink * bsink, GstQuery * query);
static void gst_glimage_sink_set_context (GstElement * element,
GstContext * context);
@ -343,6 +384,7 @@ enum
{
ARG_0,
ARG_DISPLAY,
PROP_ROTATE_METHOD,
PROP_FORCE_ASPECT_RATIO,
PROP_PIXEL_ASPECT_RATIO,
PROP_CONTEXT,
@ -400,6 +442,126 @@ _display_size_to_stream_size (GstGLImageSink * gl_sink, gdouble x,
GST_TRACE ("transform %fx%f into %fx%f", x, y, *stream_x, *stream_y);
}
/* rotate 90 */
static const gfloat clockwise_matrix[] = {
0.0f, -1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f,
};
/* rotate 180 */
static const gfloat clockwise_180_matrix[] = {
-1.0f, 0.0f, 0.0f, 0.0f,
0.0f, -1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f,
};
/* rotate 270 */
static const gfloat counterclockwise_matrix[] = {
0.0f, 1.0f, 0.0f, 0.0f,
-1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f,
};
/* horizontal-flip */
static const gfloat horizontal_flip_matrix[] = {
1.0f, 0.0f, 0.0f, 0.0f,
0.0f, -1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f,
};
/* vertical-flip */
static const gfloat vertical_flip_matrix[] = {
-1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f,
};
/* upper-left-diagonal */
static const gfloat upper_left_matrix[] = {
0.0f, 1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f,
};
/* upper-right-diagonal */
static const gfloat upper_right_matrix[] = {
0.0f, -1.0f, 0.0f, 0.0f,
-1.0f, 0.0f, 0.0f, 0.0f,
0.0f, 0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f,
};
static void
gst_glimage_sink_set_rotate_method (GstGLImageSink * gl_sink,
GstGLRotateMethod method, gboolean from_tag)
{
GstGLRotateMethod tag_method = DEFAULT_ROTATE_METHOD;
GST_GLIMAGE_SINK_LOCK (gl_sink);
if (from_tag)
tag_method = method;
else
gl_sink->rotate_method = method;
if (gl_sink->rotate_method == GST_GL_ROTATE_METHOD_AUTO)
method = tag_method;
else
method = gl_sink->rotate_method;
if (method != gl_sink->current_rotate_method) {
GST_DEBUG_OBJECT (gl_sink, "Changing method from %s to %s",
rotate_methods[gl_sink->current_rotate_method].value_nick,
rotate_methods[method].value_nick);
switch (method) {
case GST_GL_ROTATE_METHOD_IDENTITY:
gl_sink->transform_matrix = NULL;
gl_sink->output_mode_changed = TRUE;
break;
case GST_GL_ROTATE_METHOD_90R:
gl_sink->transform_matrix = clockwise_matrix;
gl_sink->output_mode_changed = TRUE;
break;
case GST_GL_ROTATE_METHOD_180:
gl_sink->transform_matrix = clockwise_180_matrix;
gl_sink->output_mode_changed = TRUE;
break;
case GST_GL_ROTATE_METHOD_90L:
gl_sink->transform_matrix = counterclockwise_matrix;
gl_sink->output_mode_changed = TRUE;
break;
case GST_GL_ROTATE_METHOD_FLIP_HORIZ:
gl_sink->transform_matrix = horizontal_flip_matrix;
gl_sink->output_mode_changed = TRUE;
break;
case GST_GL_ROTATE_METHOD_FLIP_VERT:
gl_sink->transform_matrix = vertical_flip_matrix;
gl_sink->output_mode_changed = TRUE;
break;
case GST_GL_ROTATE_METHOD_FLIP_UL_LR:
gl_sink->transform_matrix = upper_left_matrix;
gl_sink->output_mode_changed = TRUE;
break;
case GST_GL_ROTATE_METHOD_FLIP_UR_LL:
gl_sink->transform_matrix = upper_right_matrix;
gl_sink->output_mode_changed = TRUE;
break;
default:
g_assert_not_reached ();
break;
}
gl_sink->current_rotate_method = method;
}
GST_GLIMAGE_SINK_UNLOCK (gl_sink);
}
static void
gst_glimage_sink_navigation_send_event (GstNavigation * navigation, GstStructure
* structure)
@ -481,6 +643,13 @@ gst_glimage_sink_class_init (GstGLImageSinkClass * klass)
gobject_class->set_property = gst_glimage_sink_set_property;
gobject_class->get_property = gst_glimage_sink_get_property;
g_object_class_install_property (gobject_class, PROP_ROTATE_METHOD,
g_param_spec_enum ("rotate-method",
"rotate method",
"rotate method",
GST_TYPE_GL_ROTATE_METHOD, DEFAULT_ROTATE_METHOD,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_FORCE_ASPECT_RATIO,
g_param_spec_boolean ("force-aspect-ratio", "Force aspect ratio",
"When enabled, scaling will respect original aspect ratio",
@ -573,6 +742,7 @@ gst_glimage_sink_class_init (GstGLImageSinkClass * klass)
gstelement_class->change_state = gst_glimage_sink_change_state;
gstelement_class->set_context = gst_glimage_sink_set_context;
gstbasesink_class->event = gst_glimage_sink_event;
gstbasesink_class->query = GST_DEBUG_FUNCPTR (gst_glimage_sink_query);
gstbasesink_class->set_caps = gst_glimage_sink_set_caps;
gstbasesink_class->get_caps = gst_glimage_sink_get_caps;
@ -602,6 +772,9 @@ gst_glimage_sink_init (GstGLImageSink * glimage_sink)
glimage_sink->mview_output_flags = DEFAULT_MULTIVIEW_FLAGS;
glimage_sink->mview_downmix_mode = DEFAULT_MULTIVIEW_DOWNMIX;
glimage_sink->current_rotate_method = DEFAULT_ROTATE_METHOD;
glimage_sink->transform_matrix = NULL;
g_mutex_init (&glimage_sink->drawing_lock);
}
@ -616,6 +789,10 @@ gst_glimage_sink_set_property (GObject * object, guint prop_id,
glimage_sink = GST_GLIMAGE_SINK (object);
switch (prop_id) {
case PROP_ROTATE_METHOD:
gst_glimage_sink_set_rotate_method (glimage_sink,
g_value_get_enum (value), FALSE);
break;
case PROP_FORCE_ASPECT_RATIO:
{
glimage_sink->keep_aspect_ratio = g_value_get_boolean (value);
@ -683,6 +860,9 @@ gst_glimage_sink_get_property (GObject * object, guint prop_id,
glimage_sink = GST_GLIMAGE_SINK (object);
switch (prop_id) {
case PROP_ROTATE_METHOD:
g_value_set_enum (value, glimage_sink->current_rotate_method);
break;
case PROP_FORCE_ASPECT_RATIO:
g_value_set_boolean (value, glimage_sink->keep_aspect_ratio);
break;
@ -839,6 +1019,58 @@ context_error:
}
}
static gboolean
gst_glimage_sink_event (GstBaseSink * sink, GstEvent * event)
{
GstGLImageSink *gl_sink = GST_GLIMAGE_SINK (sink);
GstTagList *taglist;
gchar *orientation;
gboolean ret;
GST_DEBUG_OBJECT (gl_sink, "handling %s event", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_TAG:
gst_event_parse_tag (event, &taglist);
if (gst_tag_list_get_string (taglist, "image-orientation", &orientation)) {
if (!g_strcmp0 ("rotate-0", orientation))
gst_glimage_sink_set_rotate_method (gl_sink,
GST_GL_ROTATE_METHOD_IDENTITY, TRUE);
else if (!g_strcmp0 ("rotate-90", orientation))
gst_glimage_sink_set_rotate_method (gl_sink, GST_GL_ROTATE_METHOD_90R,
TRUE);
else if (!g_strcmp0 ("rotate-180", orientation))
gst_glimage_sink_set_rotate_method (gl_sink, GST_GL_ROTATE_METHOD_180,
TRUE);
else if (!g_strcmp0 ("rotate-270", orientation))
gst_glimage_sink_set_rotate_method (gl_sink, GST_GL_ROTATE_METHOD_90L,
TRUE);
else if (!g_strcmp0 ("flip-rotate-0", orientation))
gst_glimage_sink_set_rotate_method (gl_sink,
GST_GL_ROTATE_METHOD_FLIP_HORIZ, TRUE);
else if (!g_strcmp0 ("flip-rotate-90", orientation))
gst_glimage_sink_set_rotate_method (gl_sink,
GST_GL_ROTATE_METHOD_FLIP_UR_LL, TRUE);
else if (!g_strcmp0 ("flip-rotate-180", orientation))
gst_glimage_sink_set_rotate_method (gl_sink,
GST_GL_ROTATE_METHOD_FLIP_VERT, TRUE);
else if (!g_strcmp0 ("flip-rotate-270", orientation))
gst_glimage_sink_set_rotate_method (gl_sink,
GST_GL_ROTATE_METHOD_FLIP_UL_LR, TRUE);
g_free (orientation);
}
break;
default:
break;
}
ret = GST_BASE_SINK_CLASS (parent_class)->event (sink, event);
return ret;
}
static gboolean
gst_glimage_sink_query (GstBaseSink * bsink, GstQuery * query)
{
@ -1910,8 +2142,17 @@ gst_glimage_sink_on_resize (GstGLImageSink * gl_sink, gint width, gint height)
src.x = 0;
src.y = 0;
src.w = GST_VIDEO_SINK_WIDTH (gl_sink);
src.h = GST_VIDEO_SINK_HEIGHT (gl_sink);
if (gl_sink->current_rotate_method == GST_GL_ROTATE_METHOD_90R
|| gl_sink->current_rotate_method == GST_GL_ROTATE_METHOD_90L
|| gl_sink->current_rotate_method == GST_GL_ROTATE_METHOD_FLIP_UL_LR
|| gl_sink->current_rotate_method ==
GST_GL_ROTATE_METHOD_FLIP_UR_LL) {
src.h = GST_VIDEO_SINK_WIDTH (gl_sink);
src.w = GST_VIDEO_SINK_HEIGHT (gl_sink);
} else {
src.w = GST_VIDEO_SINK_WIDTH (gl_sink);
src.h = GST_VIDEO_SINK_HEIGHT (gl_sink);
}
dst.x = 0;
dst.y = 0;
@ -2030,6 +2271,10 @@ gst_glimage_sink_on_draw (GstGLImageSink * gl_sink)
(gl_sink->stored_buffer[0]);
gst_gl_get_affine_transformation_meta_as_ndc (af_meta, matrix);
if (gl_sink->transform_matrix)
gst_gl_multiply_matrix4 (gl_sink->transform_matrix, matrix, matrix);
gst_gl_shader_set_uniform_matrix_4fv (gl_sink->redisplay_shader,
"u_transformation", 1, FALSE, matrix);
}

18
ext/gl/gstglimagesink.h
View file

@ -44,6 +44,19 @@ GST_DEBUG_CATEGORY_EXTERN (gst_debug_glimage_sink);
#define GST_IS_GLIMAGE_SINK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GLIMAGE_SINK))
typedef enum
{
GST_GL_ROTATE_METHOD_IDENTITY,
GST_GL_ROTATE_METHOD_90R,
GST_GL_ROTATE_METHOD_180,
GST_GL_ROTATE_METHOD_90L,
GST_GL_ROTATE_METHOD_FLIP_HORIZ,
GST_GL_ROTATE_METHOD_FLIP_VERT,
GST_GL_ROTATE_METHOD_FLIP_UL_LR,
GST_GL_ROTATE_METHOD_FLIP_UR_LL,
GST_GL_ROTATE_METHOD_AUTO,
}GstGLRotateMethod;
typedef struct _GstGLImageSink GstGLImageSink;
typedef struct _GstGLImageSinkClass GstGLImageSinkClass;
@ -122,6 +135,11 @@ struct _GstGLImageSink
GstGLStereoDownmix mview_downmix_mode;
GstGLOverlayCompositor *overlay_compositor;
/* current video flip method */
GstGLRotateMethod current_rotate_method;
GstGLRotateMethod rotate_method;
const gfloat *transform_matrix;
};
struct _GstGLImageSinkClass

18
gst-libs/gst/gl/gstglutils.c
View file

@ -1089,21 +1089,25 @@ static const gfloat to_ndc_matrix[] = {
0.0f, 0.0f, 0.0, 1.0f,
};
static void
_multiply_matrix4 (const gfloat * a, const gfloat * b, gfloat * result)
void
gst_gl_multiply_matrix4 (const gfloat * a, const gfloat * b, gfloat * result)
{
int i, j, k;
gfloat tmp[16] = { 0.0f };
for (i = 0; i < 16; i++)
result[i] = 0.0f;
if (!a || !b || !result)
return;
for (i = 0; i < 4; i++) {
for (j = 0; j < 4; j++) {
for (k = 0; k < 4; k++) {
result[i + (j * 4)] += a[i + (k * 4)] * b[k + (j * 4)];
tmp[i + (j * 4)] += a[i + (k * 4)] * b[k + (j * 4)];
}
}
}
for (i = 0; i < 16; i++)
result[i] = tmp[i];
}
void
@ -1119,7 +1123,7 @@ gst_gl_get_affine_transformation_meta_as_ndc (GstVideoAffineTransformationMeta *
} else {
gfloat tmp[16] = { 0.0f };
_multiply_matrix4 (from_ndc_matrix, meta->matrix, tmp);
_multiply_matrix4 (tmp, to_ndc_matrix, matrix);
gst_gl_multiply_matrix4 (from_ndc_matrix, meta->matrix, tmp);
gst_gl_multiply_matrix4 (tmp, to_ndc_matrix, matrix);
}
}

4
gst-libs/gst/gl/gstglutils.h
View file

@ -117,7 +117,9 @@ gboolean gst_gl_value_set_texture_target_from_mask (GValue * value,
gboolean gst_gl_value_set_texture_target (GValue * value, GstGLTextureTarget target);
GstGLTextureTarget gst_gl_value_get_texture_target_mask (const GValue * value);
void gst_gl_get_affine_transformation_meta_as_ndc (GstVideoAffineTransformationMeta * meta, gfloat * matrix);
void gst_gl_multiply_matrix4 (const gfloat * a, const gfloat * b, gfloat * result);
void gst_gl_get_affine_transformation_meta_as_ndc (GstVideoAffineTransformationMeta *
meta, gfloat * matrix);
G_END_DECLS