gstreamer/ext/gl/gstgltestsrc.c
Matthew Waters bd940327ef gl: unref display/other-context in the correct place
Otherwise state changes from PLAYING->READY->PAUSED will cause there to
to be no display configured on the element.

https://bugzilla.gnome.org/show_bug.cgi?id=748405
2015-04-27 15:20:56 +10:00

934 lines
27 KiB
C

/*
* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) 2002,2007 David A. Schleef <ds@schleef.org>
* Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.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-gltestsrc
*
* <refsect2>
* <para>
* The gltestsrc element is used to produce test video texture.
* The video test produced can be controlled with the "pattern"
* property.
* </para>
* <title>Example launch line</title>
* <para>
* <programlisting>
* gst-launch -v gltestsrc pattern=smpte ! glimagesink
* </programlisting>
* Shows original SMPTE color bars in a window.
* </para>
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstgltestsrc.h"
#include "gltestsrc.h"
#include <gst/gst-i18n-plugin.h>
#define USE_PEER_BUFFERALLOC
#define SUPPORTED_GL_APIS GST_GL_API_OPENGL
GST_DEBUG_CATEGORY_STATIC (gl_test_src_debug);
#define GST_CAT_DEFAULT gl_test_src_debug
enum
{
PROP_0,
PROP_PATTERN,
PROP_TIMESTAMP_OFFSET,
PROP_IS_LIVE
/* FILL ME */
};
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"))
);
#define gst_gl_test_src_parent_class parent_class
G_DEFINE_TYPE (GstGLTestSrc, gst_gl_test_src, GST_TYPE_PUSH_SRC);
static void gst_gl_test_src_set_pattern (GstGLTestSrc * gltestsrc,
int pattern_type);
static void gst_gl_test_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_gl_test_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_gl_test_src_setcaps (GstBaseSrc * bsrc, GstCaps * caps);
static GstCaps *gst_gl_test_src_getcaps (GstBaseSrc * bsrc, GstCaps * filter);
static GstCaps *gst_gl_test_src_fixate (GstBaseSrc * bsrc, GstCaps * caps);
static gboolean gst_gl_test_src_is_seekable (GstBaseSrc * psrc);
static gboolean gst_gl_test_src_do_seek (GstBaseSrc * bsrc,
GstSegment * segment);
static gboolean gst_gl_test_src_query (GstBaseSrc * bsrc, GstQuery * query);
static void gst_gl_test_src_set_context (GstElement * element,
GstContext * context);
static GstStateChangeReturn gst_gl_test_src_change_state (GstElement * element,
GstStateChange transition);
static void gst_gl_test_src_get_times (GstBaseSrc * basesrc,
GstBuffer * buffer, GstClockTime * start, GstClockTime * end);
static GstFlowReturn gst_gl_test_src_fill (GstPushSrc * psrc,
GstBuffer * buffer);
static gboolean gst_gl_test_src_start (GstBaseSrc * basesrc);
static gboolean gst_gl_test_src_stop (GstBaseSrc * basesrc);
static gboolean gst_gl_test_src_decide_allocation (GstBaseSrc * basesrc,
GstQuery * query);
static void gst_gl_test_src_callback (gpointer stuff);
static gboolean gst_gl_test_src_init_shader (GstGLTestSrc * gltestsrc);
#define GST_TYPE_GL_TEST_SRC_PATTERN (gst_gl_test_src_pattern_get_type ())
static GType
gst_gl_test_src_pattern_get_type (void)
{
static GType gl_test_src_pattern_type = 0;
static const GEnumValue pattern_types[] = {
{GST_GL_TEST_SRC_SMPTE, "SMPTE 100% color bars", "smpte"},
{GST_GL_TEST_SRC_SNOW, "Random (television snow)", "snow"},
{GST_GL_TEST_SRC_BLACK, "100% Black", "black"},
{GST_GL_TEST_SRC_WHITE, "100% White", "white"},
{GST_GL_TEST_SRC_RED, "Red", "red"},
{GST_GL_TEST_SRC_GREEN, "Green", "green"},
{GST_GL_TEST_SRC_BLUE, "Blue", "blue"},
{GST_GL_TEST_SRC_CHECKERS1, "Checkers 1px", "checkers-1"},
{GST_GL_TEST_SRC_CHECKERS2, "Checkers 2px", "checkers-2"},
{GST_GL_TEST_SRC_CHECKERS4, "Checkers 4px", "checkers-4"},
{GST_GL_TEST_SRC_CHECKERS8, "Checkers 8px", "checkers-8"},
{GST_GL_TEST_SRC_CIRCULAR, "Circular", "circular"},
{GST_GL_TEST_SRC_BLINK, "Blink", "blink"},
{GST_GL_TEST_SRC_MANDELBROT, "Mandelbrot Fractal", "mandelbrot"},
{0, NULL, NULL}
};
if (!gl_test_src_pattern_type) {
gl_test_src_pattern_type =
g_enum_register_static ("GstGLTestSrcPattern", pattern_types);
}
return gl_test_src_pattern_type;
}
static void
gst_gl_test_src_class_init (GstGLTestSrcClass * klass)
{
GObjectClass *gobject_class;
GstBaseSrcClass *gstbasesrc_class;
GstPushSrcClass *gstpushsrc_class;
GstElementClass *element_class;
GST_DEBUG_CATEGORY_INIT (gl_test_src_debug, "gltestsrc", 0,
"Video Test Source");
gobject_class = (GObjectClass *) klass;
gstbasesrc_class = (GstBaseSrcClass *) klass;
gstpushsrc_class = (GstPushSrcClass *) klass;
element_class = GST_ELEMENT_CLASS (klass);
gobject_class->set_property = gst_gl_test_src_set_property;
gobject_class->get_property = gst_gl_test_src_get_property;
g_object_class_install_property (gobject_class, PROP_PATTERN,
g_param_spec_enum ("pattern", "Pattern",
"Type of test pattern to generate", GST_TYPE_GL_TEST_SRC_PATTERN,
GST_GL_TEST_SRC_SMPTE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_TIMESTAMP_OFFSET, g_param_spec_int64 ("timestamp-offset",
"Timestamp offset",
"An offset added to timestamps set on buffers (in ns)", G_MININT64,
G_MAXINT64, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_IS_LIVE,
g_param_spec_boolean ("is-live", "Is Live",
"Whether to act as a live source", FALSE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_metadata (element_class, "Video test source",
"Source/Video", "Creates a test video stream",
"David A. Schleef <ds@schleef.org>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
element_class->set_context = gst_gl_test_src_set_context;
element_class->change_state = gst_gl_test_src_change_state;
gstbasesrc_class->set_caps = gst_gl_test_src_setcaps;
gstbasesrc_class->get_caps = gst_gl_test_src_getcaps;
gstbasesrc_class->is_seekable = gst_gl_test_src_is_seekable;
gstbasesrc_class->do_seek = gst_gl_test_src_do_seek;
gstbasesrc_class->query = gst_gl_test_src_query;
gstbasesrc_class->get_times = gst_gl_test_src_get_times;
gstbasesrc_class->start = gst_gl_test_src_start;
gstbasesrc_class->stop = gst_gl_test_src_stop;
gstbasesrc_class->fixate = gst_gl_test_src_fixate;
gstbasesrc_class->decide_allocation = gst_gl_test_src_decide_allocation;
gstpushsrc_class->fill = gst_gl_test_src_fill;
}
static void
gst_gl_test_src_init (GstGLTestSrc * src)
{
gst_gl_test_src_set_pattern (src, GST_GL_TEST_SRC_SMPTE);
src->timestamp_offset = 0;
/* we operate in time */
gst_base_src_set_format (GST_BASE_SRC (src), GST_FORMAT_TIME);
gst_base_src_set_live (GST_BASE_SRC (src), FALSE);
}
static GstCaps *
gst_gl_test_src_fixate (GstBaseSrc * bsrc, GstCaps * caps)
{
GstStructure *structure;
GST_DEBUG ("fixate");
caps = gst_caps_make_writable (caps);
structure = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (structure, "width", 320);
gst_structure_fixate_field_nearest_int (structure, "height", 240);
gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
caps = GST_BASE_SRC_CLASS (parent_class)->fixate (bsrc, caps);
return caps;
}
const gchar *snow_vertex_src = "attribute vec4 position; \
attribute vec2 uv; \
uniform mat4 mvp; \
varying vec2 out_uv; \
void main() \
{ \
gl_Position = mvp * position; \
out_uv = uv; \
}";
const gchar *snow_fragment_src = "uniform float time; \
varying vec2 out_uv; \
\
float rand(vec2 co){ \
return fract(sin(dot(co.xy, vec2(12.9898,78.233))) * 43758.5453); \
} \
void main() \
{ \
gl_FragColor = rand(time * out_uv) * vec4(1); \
}";
const gchar *mandelbrot_vertex_src = "attribute vec4 position; \
attribute vec2 uv; \
uniform mat4 mvp; \
uniform float aspect_ratio; \
varying vec2 fractal_position; \
\
void main() \
{ \
gl_Position = mvp * position; \
fractal_position = vec2(uv.y - 0.8, aspect_ratio * (uv.x - 0.5)); \
fractal_position *= 2.5; \
}";
const gchar *mandelbrot_fragment_src = "uniform float time; \
varying vec2 fractal_position; \
\
const vec4 K = vec4(1.0, 0.66, 0.33, 3.0); \
\
vec4 hsv_to_rgb(float hue, float saturation, float value) { \
vec4 p = abs(fract(vec4(hue) + K) * 6.0 - K.wwww); \
return value * mix(K.xxxx, clamp(p - K.xxxx, 0.0, 1.0), saturation); \
} \
\
vec4 i_to_rgb(int i) { \
float hue = float(i) / 100.0 + sin(time); \
return hsv_to_rgb(hue, 0.5, 0.8); \
} \
\
vec2 pow_2_complex(vec2 c) { \
return vec2(c.x*c.x - c.y*c.y, 2.0 * c.x * c.y); \
} \
\
vec2 mandelbrot(vec2 c, vec2 c0) { \
return pow_2_complex(c) + c0; \
} \
\
vec4 iterate_pixel(vec2 position) { \
vec2 c = vec2(0); \
for (int i=0; i < 100; i++) { \
if (c.x*c.x + c.y*c.y > 2.0*2.0) \
return i_to_rgb(i); \
c = mandelbrot(c, position); \
} \
return vec4(0, 0, 0, 1); \
} \
\
void main() { \
gl_FragColor = iterate_pixel(fractal_position); \
}";
const gchar *checkers_vertex_src = "attribute vec4 position; \
uniform mat4 mvp; \
void main() \
{ \
gl_Position = mvp * position; \
}";
const gchar *checkers_fragment_src = "uniform float checker_width; \
void main() \
{ \
vec2 xy_index= floor((gl_FragCoord.xy-vec2(0.5,0.5))/checker_width); \
vec2 xy_mod=mod(xy_index,vec2(2.0,2.0)); \
float result=mod(xy_mod.x+xy_mod.y,2.0); \
gl_FragColor.r=step(result,0.5); \
gl_FragColor.g=1.0-gl_FragColor.r; \
gl_FragColor.ba=vec2(0,1); \
}";
static void
gst_gl_test_src_set_pattern (GstGLTestSrc * gltestsrc, gint pattern_type)
{
gltestsrc->pattern_type = pattern_type;
GST_DEBUG_OBJECT (gltestsrc, "setting pattern to %d", pattern_type);
switch (pattern_type) {
case GST_GL_TEST_SRC_SMPTE:
gltestsrc->make_image = gst_gl_test_src_smpte;
break;
case GST_GL_TEST_SRC_SNOW:
gltestsrc->vertex_src = snow_vertex_src;
gltestsrc->fragment_src = snow_fragment_src;
gltestsrc->make_image = gst_gl_test_src_shader;
break;
case GST_GL_TEST_SRC_BLACK:
gltestsrc->make_image = gst_gl_test_src_black;
break;
case GST_GL_TEST_SRC_WHITE:
gltestsrc->make_image = gst_gl_test_src_white;
break;
case GST_GL_TEST_SRC_RED:
gltestsrc->make_image = gst_gl_test_src_red;
break;
case GST_GL_TEST_SRC_GREEN:
gltestsrc->make_image = gst_gl_test_src_green;
break;
case GST_GL_TEST_SRC_BLUE:
gltestsrc->make_image = gst_gl_test_src_blue;
break;
case GST_GL_TEST_SRC_CHECKERS1:
gltestsrc->vertex_src = checkers_vertex_src;
gltestsrc->fragment_src = checkers_fragment_src;
gltestsrc->make_image = gst_gl_test_src_checkers1;
break;
case GST_GL_TEST_SRC_CHECKERS2:
gltestsrc->vertex_src = checkers_vertex_src;
gltestsrc->fragment_src = checkers_fragment_src;
gltestsrc->make_image = gst_gl_test_src_checkers2;
break;
case GST_GL_TEST_SRC_CHECKERS4:
gltestsrc->vertex_src = checkers_vertex_src;
gltestsrc->fragment_src = checkers_fragment_src;
gltestsrc->make_image = gst_gl_test_src_checkers4;
break;
case GST_GL_TEST_SRC_CHECKERS8:
gltestsrc->vertex_src = checkers_vertex_src;
gltestsrc->fragment_src = checkers_fragment_src;
gltestsrc->make_image = gst_gl_test_src_checkers8;
break;
case GST_GL_TEST_SRC_CIRCULAR:
gltestsrc->make_image = gst_gl_test_src_circular;
break;
case GST_GL_TEST_SRC_BLINK:
gltestsrc->make_image = gst_gl_test_src_black;
break;
case GST_GL_TEST_SRC_MANDELBROT:
gltestsrc->vertex_src = mandelbrot_vertex_src;
gltestsrc->fragment_src = mandelbrot_fragment_src;
gltestsrc->make_image = gst_gl_test_src_shader;
break;
default:
g_assert_not_reached ();
}
}
static void
gst_gl_test_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstGLTestSrc *src = GST_GL_TEST_SRC (object);
switch (prop_id) {
case PROP_PATTERN:
gst_gl_test_src_set_pattern (src, g_value_get_enum (value));
break;
case PROP_TIMESTAMP_OFFSET:
src->timestamp_offset = g_value_get_int64 (value);
break;
case PROP_IS_LIVE:
gst_base_src_set_live (GST_BASE_SRC (src), g_value_get_boolean (value));
break;
default:
break;
}
}
static void
gst_gl_test_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstGLTestSrc *src = GST_GL_TEST_SRC (object);
switch (prop_id) {
case PROP_PATTERN:
g_value_set_enum (value, src->pattern_type);
break;
case PROP_TIMESTAMP_OFFSET:
g_value_set_int64 (value, src->timestamp_offset);
break;
case PROP_IS_LIVE:
g_value_set_boolean (value, gst_base_src_is_live (GST_BASE_SRC (src)));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_gl_test_src_setcaps (GstBaseSrc * bsrc, GstCaps * caps)
{
GstGLTestSrc *gltestsrc = GST_GL_TEST_SRC (bsrc);
GST_DEBUG ("setcaps");
if (!gst_video_info_from_caps (&gltestsrc->out_info, caps))
goto wrong_caps;
gltestsrc->negotiated = TRUE;
gst_caps_replace (&gltestsrc->out_caps, caps);
return TRUE;
/* ERRORS */
wrong_caps:
{
GST_WARNING ("wrong caps");
return FALSE;
}
}
static GstCaps *
gst_gl_test_src_getcaps (GstBaseSrc * bsrc, GstCaps * filter)
{
GstCaps *tmp = NULL;
GstCaps *result =
gst_caps_from_string ("video/x-raw(memory:GLMemory),format=RGBA");
if (filter) {
tmp = gst_caps_intersect_full (filter, result, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (result);
result = tmp;
}
GST_DEBUG_OBJECT (bsrc, "returning caps: %" GST_PTR_FORMAT, result);
return result;
}
static void
gst_gl_test_src_set_context (GstElement * element, GstContext * context)
{
GstGLTestSrc *src = GST_GL_TEST_SRC (element);
gst_gl_handle_set_context (element, context, &src->display,
&src->other_context);
if (src->display)
gst_gl_display_filter_gl_api (src->display, SUPPORTED_GL_APIS);
}
static gboolean
gst_gl_test_src_query (GstBaseSrc * bsrc, GstQuery * query)
{
gboolean res = FALSE;
GstGLTestSrc *src;
src = GST_GL_TEST_SRC (bsrc);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CONTEXT:
{
const gchar *context_type;
GstContext *context, *old_context;
res = gst_gl_handle_context_query ((GstElement *) src, query,
&src->display, &src->other_context);
if (src->display)
gst_gl_display_filter_gl_api (src->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, src->context,
NULL);
gst_query_set_context (query, context);
gst_context_unref (context);
res = src->context != NULL;
}
GST_LOG_OBJECT (src, "context query of type %s %i", context_type, res);
if (res)
return res;
break;
}
case GST_QUERY_CONVERT:
{
GstFormat src_fmt, dest_fmt;
gint64 src_val, dest_val;
gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
res =
gst_video_info_convert (&src->out_info, src_fmt, src_val, dest_fmt,
&dest_val);
gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
return res;
}
default:
break;
}
return GST_BASE_SRC_CLASS (parent_class)->query (bsrc, query);
}
static void
gst_gl_test_src_get_times (GstBaseSrc * basesrc, GstBuffer * buffer,
GstClockTime * start, GstClockTime * end)
{
/* for live sources, sync on the timestamp of the buffer */
if (gst_base_src_is_live (basesrc)) {
GstClockTime timestamp = GST_BUFFER_TIMESTAMP (buffer);
if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
/* get duration to calculate end time */
GstClockTime duration = GST_BUFFER_DURATION (buffer);
if (GST_CLOCK_TIME_IS_VALID (duration))
*end = timestamp + duration;
*start = timestamp;
}
} else {
*start = -1;
*end = -1;
}
}
static gboolean
gst_gl_test_src_do_seek (GstBaseSrc * bsrc, GstSegment * segment)
{
GstClockTime time;
GstGLTestSrc *src;
src = GST_GL_TEST_SRC (bsrc);
segment->time = segment->start;
time = segment->position;
/* now move to the time indicated */
if (src->out_info.fps_n) {
src->n_frames = gst_util_uint64_scale (time,
src->out_info.fps_n, src->out_info.fps_d * GST_SECOND);
} else
src->n_frames = 0;
if (src->out_info.fps_n) {
src->running_time = gst_util_uint64_scale (src->n_frames,
src->out_info.fps_d * GST_SECOND, src->out_info.fps_n);
} else {
/* FIXME : Not sure what to set here */
src->running_time = 0;
}
g_return_val_if_fail (src->running_time <= time, FALSE);
return TRUE;
}
static gboolean
gst_gl_test_src_is_seekable (GstBaseSrc * psrc)
{
/* we're seekable... */
return TRUE;
}
static gboolean
gst_gl_test_src_init_shader (GstGLTestSrc * gltestsrc)
{
if (gst_gl_context_get_gl_api (gltestsrc->context)) {
/* blocking call, wait until the opengl thread has compiled the shader */
if (gltestsrc->vertex_src == NULL)
return FALSE;
return gst_gl_context_gen_shader (gltestsrc->context, gltestsrc->vertex_src,
gltestsrc->fragment_src, &gltestsrc->shader);
}
return TRUE;
}
static GstFlowReturn
gst_gl_test_src_fill (GstPushSrc * psrc, GstBuffer * buffer)
{
GstGLTestSrc *src = GST_GL_TEST_SRC (psrc);
GstClockTime next_time;
gint width, height;
GstVideoFrame out_frame;
GstGLSyncMeta *sync_meta;
guint out_tex;
if (G_UNLIKELY (!src->negotiated || !src->context))
goto not_negotiated;
width = GST_VIDEO_INFO_WIDTH (&src->out_info);
height = GST_VIDEO_INFO_HEIGHT (&src->out_info);
/* 0 framerate and we are at the second frame, eos */
if (G_UNLIKELY (GST_VIDEO_INFO_FPS_N (&src->out_info) == 0
&& src->n_frames == 1))
goto eos;
if (src->pattern_type == GST_GL_TEST_SRC_BLINK) {
if (src->n_frames & 0x1)
src->make_image = gst_gl_test_src_white;
else
src->make_image = gst_gl_test_src_black;
}
if (!gst_video_frame_map (&out_frame, &src->out_info, buffer,
GST_MAP_WRITE | GST_MAP_GL)) {
return GST_FLOW_NOT_NEGOTIATED;
}
out_tex = *(guint *) out_frame.data[0];
gst_buffer_replace (&src->buffer, buffer);
if (!gst_gl_context_use_fbo_v2 (src->context, width, height, src->fbo,
src->depthbuffer, out_tex, gst_gl_test_src_callback,
(gpointer) src)) {
goto not_negotiated;
}
gst_video_frame_unmap (&out_frame);
sync_meta = gst_buffer_get_gl_sync_meta (buffer);
if (sync_meta)
gst_gl_sync_meta_set_sync_point (sync_meta, src->context);
GST_BUFFER_TIMESTAMP (buffer) = src->timestamp_offset + src->running_time;
GST_BUFFER_OFFSET (buffer) = src->n_frames;
src->n_frames++;
GST_BUFFER_OFFSET_END (buffer) = src->n_frames;
if (src->out_info.fps_n) {
next_time = gst_util_uint64_scale_int (src->n_frames * GST_SECOND,
src->out_info.fps_d, src->out_info.fps_n);
GST_BUFFER_DURATION (buffer) = next_time - src->running_time;
} else {
next_time = src->timestamp_offset;
/* NONE means forever */
GST_BUFFER_DURATION (buffer) = GST_CLOCK_TIME_NONE;
}
src->running_time = next_time;
return GST_FLOW_OK;
not_negotiated:
{
GST_ELEMENT_ERROR (src, CORE, NEGOTIATION, (NULL),
(_("format wasn't negotiated before get function")));
return GST_FLOW_NOT_NEGOTIATED;
}
eos:
{
GST_DEBUG_OBJECT (src, "eos: 0 framerate, frame %d", (gint) src->n_frames);
return GST_FLOW_EOS;
}
}
static gboolean
gst_gl_test_src_start (GstBaseSrc * basesrc)
{
GstGLTestSrc *src = GST_GL_TEST_SRC (basesrc);
if (!gst_gl_ensure_element_data (src, &src->display, &src->other_context))
return FALSE;
gst_gl_display_filter_gl_api (src->display, SUPPORTED_GL_APIS);
src->running_time = 0;
src->n_frames = 0;
src->negotiated = FALSE;
return TRUE;
}
static gboolean
gst_gl_test_src_stop (GstBaseSrc * basesrc)
{
GstGLTestSrc *src = GST_GL_TEST_SRC (basesrc);
gst_caps_replace (&src->out_caps, NULL);
if (src->context) {
if (src->shader) {
gst_object_unref (src->shader);
src->shader = NULL;
}
//blocking call, delete the FBO
gst_gl_context_del_fbo (src->context, src->fbo, src->depthbuffer);
gst_object_unref (src->context);
src->context = NULL;
}
return TRUE;
}
static gboolean
_find_local_gl_context (GstGLTestSrc * src)
{
GstQuery *query;
GstContext *context;
const GstStructure *s;
if (src->context)
return TRUE;
query = gst_query_new_context ("gst.gl.local_context");
if (!src->context && gst_gl_run_query (GST_ELEMENT (src), 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, &src->context,
NULL);
}
}
if (!src->context
&& gst_gl_run_query (GST_ELEMENT (src), 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, &src->context,
NULL);
}
}
GST_DEBUG_OBJECT (src, "found local context %p", src->context);
gst_query_unref (query);
if (src->context)
return TRUE;
return FALSE;
}
static gboolean
gst_gl_test_src_decide_allocation (GstBaseSrc * basesrc, GstQuery * query)
{
GstGLTestSrc *src = GST_GL_TEST_SRC (basesrc);
GstBufferPool *pool = NULL;
GstStructure *config;
GstCaps *caps;
guint min, max, size;
gboolean update_pool;
GError *error = NULL;
guint out_width, out_height;
if (!gst_gl_ensure_element_data (src, &src->display, &src->other_context))
return FALSE;
gst_gl_display_filter_gl_api (src->display, SUPPORTED_GL_APIS);
_find_local_gl_context (src);
if (!src->context) {
GST_OBJECT_LOCK (src->display);
do {
if (src->context)
gst_object_unref (src->context);
/* just get a GL context. we don't care */
src->context =
gst_gl_display_get_gl_context_for_thread (src->display, NULL);
if (!src->context) {
src->context = gst_gl_context_new (src->display);
if (!gst_gl_context_create (src->context, src->other_context, &error))
goto context_error;
}
} while (!gst_gl_display_add_context (src->display, src->context));
GST_OBJECT_UNLOCK (src->display);
}
out_width = GST_VIDEO_INFO_WIDTH (&src->out_info);
out_height = GST_VIDEO_INFO_HEIGHT (&src->out_info);
if (!gst_gl_context_gen_fbo (src->context, out_width, out_height,
&src->fbo, &src->depthbuffer))
goto context_error;
gst_query_parse_allocation (query, &caps, NULL);
if (gst_query_get_n_allocation_pools (query) > 0) {
gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
update_pool = TRUE;
} else {
GstVideoInfo vinfo;
gst_video_info_init (&vinfo);
gst_video_info_from_caps (&vinfo, caps);
size = vinfo.size;
min = max = 0;
update_pool = FALSE;
}
if (!pool || !GST_IS_GL_BUFFER_POOL (pool)) {
/* can't use this pool */
if (pool)
gst_object_unref (pool);
pool = gst_gl_buffer_pool_new (src->context);
}
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, caps, size, min, max);
gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META);
if (gst_query_find_allocation_meta (query, GST_GL_SYNC_META_API_TYPE, NULL))
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_GL_SYNC_META);
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_GL_TEXTURE_UPLOAD_META);
gst_buffer_pool_set_config (pool, config);
if (update_pool)
gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
else
gst_query_add_allocation_pool (query, pool, size, min, max);
gst_gl_test_src_init_shader (src);
gst_object_unref (pool);
return TRUE;
context_error:
{
GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, ("%s", error->message),
(NULL));
gst_object_unref (src->context);
src->context = NULL;
return FALSE;
}
}
//opengl scene
static void
gst_gl_test_src_callback (gpointer stuff)
{
GstGLTestSrc *src = GST_GL_TEST_SRC (stuff);
src->make_image (src, src->buffer, GST_VIDEO_INFO_WIDTH (&src->out_info),
GST_VIDEO_INFO_HEIGHT (&src->out_info));
gst_buffer_unref (src->buffer);
src->buffer = NULL;
}
static GstStateChangeReturn
gst_gl_test_src_change_state (GstElement * element, GstStateChange transition)
{
GstGLTestSrc *src = GST_GL_TEST_SRC (element);
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GST_DEBUG_OBJECT (src, "changing state: %s => %s",
gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!gst_gl_ensure_element_data (element, &src->display,
&src->other_context))
return GST_STATE_CHANGE_FAILURE;
gst_gl_display_filter_gl_api (src->display, SUPPORTED_GL_APIS);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
if (src->other_context) {
gst_object_unref (src->other_context);
src->other_context = NULL;
}
if (src->display) {
gst_object_unref (src->display);
src->display = NULL;
}
break;
default:
break;
}
return ret;
}