/* GStreamer
* Copyright (C) 2004 Benjamin Otte <otte@gnome.org>
* Copyright (C) 2009 Jonathan Matthew <notverysmart@gmail.com>
* Copyright (C) 2011 Julien Isorce <julien.isorce@gmail.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-libvisualgl
*
* Wrapper for libvisual plugins that use OpenGL
*
* <refsect2>
* <title>Examples</title>
* |[
* gst-launch -v audiotestsrc ! libvisual_gl_lv_flower ! glimagesink
* ]|
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/base/gstadapter.h>
#include <gst/video/video.h>
#include <gst/audio/audio.h>
#include <gst/gl/gstglbuffer.h>
#include <gst/gl/gstgldisplay.h>
#include <libvisual/libvisual.h>
#define GST_TYPE_VISUAL_GL (gst_visual_gl_get_type())
#define GST_IS_VISUAL_GL(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VISUAL_GL))
#define GST_VISUAL_GL(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VISUAL_GL,GstVisualGL))
#define GST_IS_VISUAL_GL_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VISUAL_GL))
#define GST_VISUAL_GL_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VISUAL_GL,GstVisualGLClass))
#define GST_VISUAL_GL_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_VISUAL_GL, GstVisualGLClass))
typedef struct _GstVisualGL GstVisualGL;
typedef struct _GstVisualGLClass GstVisualGLClass;
/* XXX use same category as libvisual plugin in -base? */
GST_DEBUG_CATEGORY_STATIC (libvisual_debug);
#define GST_CAT_DEFAULT (libvisual_debug)
/* amounf of samples before we can feed libvisual */
#define VISUAL_SAMPLES 512
#define DEFAULT_WIDTH 320
#define DEFAULT_HEIGHT 240
#define DEFAULT_FPS_N 25
#define DEFAULT_FPS_D 1
struct _GstVisualGL
{
GstElement element;
/* pads */
GstPad *sinkpad;
GstPad *srcpad;
GstSegment segment;
/* GL stuff */
GstGLDisplay *display;
GLuint fbo;
GLuint depthbuffer;
GLuint midtexture;
GLdouble actor_projection_matrix[16];
GLdouble actor_modelview_matrix[16];
GLboolean is_enabled_gl_depth_test;
GLint gl_depth_func;
GLboolean is_enabled_gl_blend;
GLint gl_blend_src_alpha;
/* libvisual stuff */
VisAudio *audio;
VisVideo *video;
VisActor *actor;
int actor_setup_result;
/* audio/video state */
gint channels;
gint rate; /* Input samplerate */
gint bps;
VisAudioSampleRateType libvisual_rate;
/* framerate numerator & denominator */
gint fps_n;
gint fps_d;
gint width;
gint height;
GstClockTime duration;
guint outsize;
/* samples per frame based on caps */
guint spf;
/* state stuff */
GstAdapter *adapter;
guint count;
/* QoS stuff *//* with LOCK */
gdouble proportion;
GstClockTime earliest_time;
};
struct _GstVisualGLClass
{
GstElementClass parent_class;
VisPluginRef *plugin;
};
GType gst_visual_gl_get_type (void);
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_GL_VIDEO_CAPS)
);
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"width = (int) 16, "
"depth = (int) 16, "
"endianness = (int) BYTE_ORDER, "
"signed = (boolean) TRUE, " "channels = (int) { 1, 2 }, "
"rate = (int) { 8000, 11250, 22500, 32000, 44100, 48000, 96000 }")
);
static void gst_visual_gl_class_init (gpointer g_class, gpointer class_data);
static void gst_visual_gl_init (GstVisualGL * visual);
static void gst_visual_gl_dispose (GObject * object);
static GstStateChangeReturn gst_visual_gl_change_state (GstElement * element,
GstStateChange transition);
static GstFlowReturn gst_visual_gl_chain (GstPad * pad, GstBuffer * buffer);
static gboolean gst_visual_gl_sink_event (GstPad * pad, GstEvent * event);
static gboolean gst_visual_gl_src_event (GstPad * pad, GstEvent * event);
static gboolean gst_visual_gl_src_query (GstPad * pad, GstQuery * query);
static gboolean gst_visual_gl_sink_setcaps (GstPad * pad, GstCaps * caps);
static gboolean gst_visual_gl_src_setcaps (GstPad * pad, GstCaps * caps);
static GstCaps *gst_visual_gl_getcaps (GstPad * pad);
static void libvisual_log_handler (const char *message, const char *funcname,
void *priv);
static GstElementClass *parent_class = NULL;
GType
gst_visual_gl_get_type (void)
{
static GType type = 0;
if (G_UNLIKELY (type == 0)) {
static const GTypeInfo info = {
sizeof (GstVisualGLClass),
NULL,
NULL,
gst_visual_gl_class_init,
NULL,
NULL,
sizeof (GstVisualGL),
0,
(GInstanceInitFunc) gst_visual_gl_init,
};
type = g_type_register_static (GST_TYPE_ELEMENT, "GstVisualGL", &info, 0);
}
return type;
}
static void
libvisual_log_handler (const char *message, const char *funcname, void *priv)
{
GST_CAT_LEVEL_LOG (libvisual_debug, (GstDebugLevel) (priv), NULL, "%s - %s",
funcname, message);
}
static void
gst_visual_gl_class_init (gpointer g_class, gpointer class_data)
{
GstVisualGLClass *klass = GST_VISUAL_GL_CLASS (g_class);
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
GObjectClass *object = G_OBJECT_CLASS (g_class);
klass->plugin = class_data;
element_class->change_state = gst_visual_gl_change_state;
if (class_data == NULL) {
parent_class = g_type_class_peek_parent (g_class);
} else {
char *longname = g_strdup_printf ("libvisual %s plugin v.%s",
klass->plugin->info->name, klass->plugin->info->version);
/* FIXME: improve to only register what plugin supports? */
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_set_metadata (element_class,
longname, "Visualization", klass->plugin->info->about,
"Benjamin Otte <otte@gnome.org>");
g_free (longname);
}
object->dispose = gst_visual_gl_dispose;
}
static void
gst_visual_gl_init (GstVisualGL * visual)
{
/* create the sink and src pads */
visual->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink");
gst_pad_set_setcaps_function (visual->sinkpad, gst_visual_gl_sink_setcaps);
gst_pad_set_chain_function (visual->sinkpad, gst_visual_gl_chain);
gst_pad_set_event_function (visual->sinkpad, gst_visual_gl_sink_event);
gst_element_add_pad (GST_ELEMENT (visual), visual->sinkpad);
visual->srcpad = gst_pad_new_from_static_template (&src_template, "src");
gst_pad_set_setcaps_function (visual->srcpad, gst_visual_gl_src_setcaps);
gst_pad_set_getcaps_function (visual->srcpad, gst_visual_gl_getcaps);
gst_pad_set_event_function (visual->srcpad, gst_visual_gl_src_event);
gst_pad_set_query_function (visual->srcpad, gst_visual_gl_src_query);
gst_element_add_pad (GST_ELEMENT (visual), visual->srcpad);
visual->adapter = gst_adapter_new ();
visual->actor = NULL;
visual->display = NULL;
visual->fbo = 0;
visual->depthbuffer = 0;
visual->midtexture = 0;
visual->is_enabled_gl_depth_test = GL_FALSE;
visual->gl_depth_func = GL_LESS;
visual->is_enabled_gl_blend = GL_FALSE;
visual->gl_blend_src_alpha = GL_ONE;
}
static void
gst_visual_gl_clear_actors (GstVisualGL * visual)
{
if (visual->actor) {
visual_object_unref (VISUAL_OBJECT (visual->actor));
visual->actor = NULL;
}
if (visual->video) {
visual_object_unref (VISUAL_OBJECT (visual->video));
visual->video = NULL;
}
if (visual->audio) {
visual_object_unref (VISUAL_OBJECT (visual->audio));
visual->audio = NULL;
}
}
static void
gst_visual_gl_dispose (GObject * object)
{
GstVisualGL *visual = GST_VISUAL_GL (object);
if (visual->adapter) {
gst_object_unref (visual->adapter);
visual->adapter = NULL;
}
GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
}
static void
gst_visual_gl_reset (GstVisualGL * visual)
{
gst_adapter_clear (visual->adapter);
gst_segment_init (&visual->segment, GST_FORMAT_UNDEFINED);
GST_OBJECT_LOCK (visual);
visual->proportion = 1.0;
visual->earliest_time = -1;
GST_OBJECT_UNLOCK (visual);
}
static GstCaps *
gst_visual_gl_getcaps (GstPad * pad)
{
GstCaps *ret;
GstVisualGL *visual = GST_VISUAL_GL (gst_pad_get_parent (pad));
int depths;
if (!visual->actor) {
ret = gst_caps_copy (gst_pad_get_pad_template_caps (visual->srcpad));
goto beach;
}
ret = gst_caps_new_empty ();
depths = visual_actor_get_supported_depth (visual->actor);
if (depths < 0) {
/* FIXME: set an error */
goto beach;
}
if ((depths & VISUAL_VIDEO_DEPTH_GL) == 0) {
/* We don't handle non-GL plugins */
goto beach;
}
GST_DEBUG_OBJECT (visual, "libvisual-gl plugin supports depths %u (0x%04x)",
depths, depths);
/* only do GL output */
gst_caps_append (ret, gst_caps_from_string (GST_GL_VIDEO_CAPS));
beach:
GST_DEBUG_OBJECT (visual, "returning caps %" GST_PTR_FORMAT, ret);
gst_object_unref (visual);
return ret;
}
static gboolean
gst_visual_gl_src_setcaps (GstPad * pad, GstCaps * caps)
{
GstVisualGL *visual = GST_VISUAL_GL (gst_pad_get_parent (pad));
GstStructure *structure;
structure = gst_caps_get_structure (caps, 0);
GST_DEBUG_OBJECT (visual, "src pad got caps %" GST_PTR_FORMAT, caps);
if (!gst_structure_get_int (structure, "width", &visual->width))
goto error;
if (!gst_structure_get_int (structure, "height", &visual->height))
goto error;
if (!gst_structure_get_fraction (structure, "framerate", &visual->fps_n,
&visual->fps_d))
goto error;
/* precalc some values */
visual->spf =
gst_util_uint64_scale_int (visual->rate, visual->fps_d, visual->fps_n);
visual->duration =
gst_util_uint64_scale_int (GST_SECOND, visual->fps_d, visual->fps_n);
gst_gl_display_gen_texture (visual->display, &visual->midtexture,
visual->width, visual->height);
gst_gl_display_gen_fbo (visual->display, visual->width, visual->height,
&visual->fbo, &visual->depthbuffer);
gst_object_unref (visual);
return TRUE;
/* ERRORS */
error:
{
GST_DEBUG_OBJECT (visual, "error parsing caps");
gst_object_unref (visual);
return FALSE;
}
}
static gboolean
gst_visual_gl_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstVisualGL *visual = GST_VISUAL_GL (gst_pad_get_parent (pad));
GstStructure *structure;
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "channels", &visual->channels);
gst_structure_get_int (structure, "rate", &visual->rate);
switch (visual->rate) {
case 8000:
visual->libvisual_rate = VISUAL_AUDIO_SAMPLE_RATE_8000;
break;
case 11250:
visual->libvisual_rate = VISUAL_AUDIO_SAMPLE_RATE_11250;
break;
case 22500:
visual->libvisual_rate = VISUAL_AUDIO_SAMPLE_RATE_22500;
break;
case 32000:
visual->libvisual_rate = VISUAL_AUDIO_SAMPLE_RATE_32000;
break;
case 44100:
visual->libvisual_rate = VISUAL_AUDIO_SAMPLE_RATE_44100;
break;
case 48000:
visual->libvisual_rate = VISUAL_AUDIO_SAMPLE_RATE_48000;
break;
case 96000:
visual->libvisual_rate = VISUAL_AUDIO_SAMPLE_RATE_96000;
break;
default:
gst_object_unref (visual);
return FALSE;
}
/* this is how many samples we need to fill one frame at the requested
* framerate. */
if (visual->fps_n != 0) {
visual->spf =
gst_util_uint64_scale_int (visual->rate, visual->fps_d, visual->fps_n);
}
visual->bps = visual->channels * sizeof (gint16);
gst_object_unref (visual);
return TRUE;
}
static gboolean
gst_vis_gl_src_negotiate (GstVisualGL * visual)
{
GstCaps *othercaps, *target;
GstStructure *structure;
GstCaps *caps;
caps = gst_pad_get_caps (visual->srcpad);
/* see what the peer can do */
othercaps = gst_pad_peer_get_caps (visual->srcpad);
if (othercaps) {
target = gst_caps_intersect (othercaps, caps);
gst_caps_unref (othercaps);
gst_caps_unref (caps);
if (gst_caps_is_empty (target))
goto no_format;
gst_caps_truncate (target);
} else {
/* need a copy, we'll be modifying it when fixating */
target = gst_caps_copy (caps);
gst_caps_unref (caps);
}
/* fixate in case something is not fixed. This does nothing if the value is
* already fixed. For video we always try to fixate to something like
* 320x240x25 by convention. */
structure = gst_caps_get_structure (target, 0);
gst_structure_fixate_field_nearest_int (structure, "width", DEFAULT_WIDTH);
gst_structure_fixate_field_nearest_int (structure, "height", DEFAULT_HEIGHT);
gst_structure_fixate_field_nearest_fraction (structure, "framerate",
DEFAULT_FPS_N, DEFAULT_FPS_D);
gst_pad_set_caps (visual->srcpad, target);
gst_caps_unref (target);
return TRUE;
/* ERRORS */
no_format:
{
GST_ELEMENT_ERROR (visual, STREAM, FORMAT, (NULL),
("could not negotiate output format"));
gst_caps_unref (target);
return FALSE;
}
}
static gboolean
gst_visual_gl_sink_event (GstPad * pad, GstEvent * event)
{
GstVisualGL *visual;
gboolean res;
visual = GST_VISUAL_GL (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
res = gst_pad_push_event (visual->srcpad, event);
break;
case GST_EVENT_FLUSH_STOP:
/* reset QoS and adapter. */
gst_visual_gl_reset (visual);
res = gst_pad_push_event (visual->srcpad, event);
break;
case GST_EVENT_NEWSEGMENT:
{
GstFormat format;
gdouble rate, arate;
gint64 start, stop, time;
gboolean update;
/* the newsegment values are used to clip the input samples
* and to convert the incomming timestamps to running time so
* we can do QoS */
gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
&start, &stop, &time);
/* now configure the values */
gst_segment_set_newsegment_full (&visual->segment, update,
rate, arate, format, start, stop, time);
/* and forward */
res = gst_pad_push_event (visual->srcpad, event);
break;
}
default:
res = gst_pad_push_event (visual->srcpad, event);
break;
}
gst_object_unref (visual);
return res;
}
static gboolean
gst_visual_gl_src_event (GstPad * pad, GstEvent * event)
{
GstVisualGL *visual;
gboolean res;
visual = GST_VISUAL_GL (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_QOS:
{
gdouble proportion;
GstClockTimeDiff diff;
GstClockTime timestamp;
gst_event_parse_qos (event, &proportion, &diff, ×tamp);
/* save stuff for the _chain function */
GST_OBJECT_LOCK (visual);
visual->proportion = proportion;
if (diff >= 0)
/* we're late, this is a good estimate for next displayable
* frame (see part-qos.txt) */
visual->earliest_time = timestamp + 2 * diff + visual->duration;
else
visual->earliest_time = timestamp + diff;
GST_OBJECT_UNLOCK (visual);
res = gst_pad_push_event (visual->sinkpad, event);
break;
}
default:
res = gst_pad_push_event (visual->sinkpad, event);
break;
}
gst_object_unref (visual);
return res;
}
static gboolean
gst_visual_gl_src_query (GstPad * pad, GstQuery * query)
{
gboolean res;
GstVisualGL *visual;
visual = GST_VISUAL_GL (gst_pad_get_parent (pad));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
/* We need to send the query upstream and add the returned latency to our
* own */
GstClockTime min_latency, max_latency;
gboolean us_live;
GstClockTime our_latency;
guint max_samples;
if ((res = gst_pad_peer_query (visual->sinkpad, query))) {
gst_query_parse_latency (query, &us_live, &min_latency, &max_latency);
GST_DEBUG_OBJECT (visual, "Peer latency: min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
/* the max samples we must buffer buffer */
max_samples = MAX (VISUAL_SAMPLES, visual->spf);
our_latency =
gst_util_uint64_scale_int (max_samples, GST_SECOND, visual->rate);
GST_DEBUG_OBJECT (visual, "Our latency: %" GST_TIME_FORMAT,
GST_TIME_ARGS (our_latency));
/* we add some latency but only if we need to buffer more than what
* upstream gives us */
min_latency += our_latency;
if (max_latency != -1)
max_latency += our_latency;
GST_DEBUG_OBJECT (visual, "Calculated total latency : min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
gst_query_set_latency (query, TRUE, min_latency, max_latency);
}
break;
}
case GST_QUERY_CUSTOM:
{
GstStructure *structure = gst_query_get_structure (query);
gchar *name = gst_element_get_name (visual);
res = g_strcmp0 (name, gst_structure_get_name (structure)) == 0;
g_free (name);
if (!res)
res = gst_pad_query_default (pad, query);
break;
}
default:
res = gst_pad_peer_query (visual->sinkpad, query);
break;
}
gst_object_unref (visual);
return res;
}
/* allocate and output buffer, if no format was negotiated, this
* function will negotiate one. After calling this function, a
* reverse negotiation could have happened. */
static GstFlowReturn
get_buffer (GstVisualGL * visual, GstGLBuffer ** outbuf)
{
/* we don't know an output format yet, pick one */
if (GST_PAD_CAPS (visual->srcpad) == NULL) {
if (!gst_vis_gl_src_negotiate (visual))
return GST_FLOW_NOT_NEGOTIATED;
}
GST_DEBUG_OBJECT (visual, "allocating output buffer with caps %"
GST_PTR_FORMAT, GST_PAD_CAPS (visual->srcpad));
*outbuf = gst_gl_buffer_new (visual->display, visual->width, visual->height);
if (*outbuf == NULL)
return GST_FLOW_ERROR;
gst_buffer_set_caps (GST_BUFFER (*outbuf), GST_PAD_CAPS (visual->srcpad));
return GST_FLOW_OK;
}
static void
actor_setup (GstGLDisplay * display, GstVisualGL * visual)
{
/* save and clear top of the stack */
glPushAttrib (GL_ALL_ATTRIB_BITS);
glMatrixMode (GL_PROJECTION);
glPushMatrix ();
glLoadIdentity ();
glMatrixMode (GL_MODELVIEW);
glPushMatrix ();
glLoadIdentity ();
visual->actor_setup_result = visual_actor_realize (visual->actor);
if (visual->actor_setup_result == 0) {
/* store the actor's matrices for rendering the first frame */
glGetDoublev (GL_MODELVIEW_MATRIX, visual->actor_modelview_matrix);
glGetDoublev (GL_PROJECTION_MATRIX, visual->actor_projection_matrix);
visual->is_enabled_gl_depth_test = glIsEnabled (GL_DEPTH_TEST);
glGetIntegerv (GL_DEPTH_FUNC, &visual->gl_depth_func);
visual->is_enabled_gl_blend = glIsEnabled (GL_BLEND);
glGetIntegerv (GL_BLEND_SRC_ALPHA, &visual->gl_blend_src_alpha);
/* retore matrix */
glMatrixMode (GL_PROJECTION);
glPopMatrix ();
glMatrixMode (GL_MODELVIEW);
glPopMatrix ();
glPopAttrib ();
}
}
static void
actor_negotiate (GstGLDisplay * display, GstVisualGL * visual)
{
gint err = VISUAL_OK;
err = visual_video_set_depth (visual->video, VISUAL_VIDEO_DEPTH_GL);
if (err != VISUAL_OK)
g_warning ("failed to visual_video_set_depth\n");
err =
visual_video_set_dimension (visual->video, visual->width, visual->height);
if (err != VISUAL_OK)
g_warning ("failed to visual_video_set_dimension\n");
err = visual_actor_video_negotiate (visual->actor, 0, FALSE, FALSE);
if (err != VISUAL_OK)
g_warning ("failed to visual_actor_video_negotiate\n");
}
static void
check_gl_matrix (void)
{
GLdouble projection_matrix[16];
GLdouble modelview_matrix[16];
gint i = 0;
gint j = 0;
glGetDoublev (GL_PROJECTION_MATRIX, projection_matrix);
glGetDoublev (GL_MODELVIEW_MATRIX, modelview_matrix);
for (j = 0; j < 4; ++j) {
for (i = 0; i < 4; ++i) {
if (projection_matrix[i + 4 * j] != projection_matrix[i + 4 * j])
g_warning ("invalid projection matrix at coordiante %dx%d: %f\n", i, j,
projection_matrix[i + 4 * j]);
if (modelview_matrix[i + 4 * j] != modelview_matrix[i + 4 * j])
g_warning ("invalid modelview_matrix matrix at coordiante %dx%d: %f\n",
i, j, modelview_matrix[i + 4 * j]);
}
}
}
static void
render_frame (GstVisualGL * visual)
{
const guint16 *data;
VisBuffer *lbuf, *rbuf;
guint16 ldata[VISUAL_SAMPLES], rdata[VISUAL_SAMPLES];
guint i;
gcahr *name;
/* Read VISUAL_SAMPLES samples per channel */
data =
(const guint16 *) gst_adapter_peek (visual->adapter,
VISUAL_SAMPLES * visual->bps);
lbuf = visual_buffer_new_with_buffer (ldata, sizeof (ldata), NULL);
rbuf = visual_buffer_new_with_buffer (rdata, sizeof (rdata), NULL);
if (visual->channels == 2) {
for (i = 0; i < VISUAL_SAMPLES; i++) {
ldata[i] = *data++;
rdata[i] = *data++;
}
} else {
for (i = 0; i < VISUAL_SAMPLES; i++) {
ldata[i] = *data;
rdata[i] = *data++;
}
}
visual_audio_samplepool_input_channel (visual->audio->samplepool,
lbuf, visual->libvisual_rate, VISUAL_AUDIO_SAMPLE_FORMAT_S16,
VISUAL_AUDIO_CHANNEL_LEFT);
visual_audio_samplepool_input_channel (visual->audio->samplepool,
rbuf, visual->libvisual_rate, VISUAL_AUDIO_SAMPLE_FORMAT_S16,
VISUAL_AUDIO_CHANNEL_RIGHT);
visual_object_unref (VISUAL_OBJECT (lbuf));
visual_object_unref (VISUAL_OBJECT (rbuf));
visual_audio_analyze (visual->audio);
/* apply the matrices that the actor set up */
glPushAttrib (GL_ALL_ATTRIB_BITS);
glMatrixMode (GL_PROJECTION);
glPushMatrix ();
glLoadMatrixd (visual->actor_projection_matrix);
glMatrixMode (GL_MODELVIEW);
glPushMatrix ();
glLoadMatrixd (visual->actor_modelview_matrix);
/* This line try to hacks compatiblity with libprojectM
* If libprojectM version <= 2.0.0 then we have to unbind our current
* fbo to see something. But it's incorrect and we cannot use fbo chainning (append other glfilters
* after libvisual_gl_projectM will not work)
* To have full compatibility, libprojectM needs to take care of our fbo.
* Indeed libprojectM has to unbind it before the first rendering pass
* and then rebind it before the final pass. It's done from 2.0.1
*/
name = gst_element_get_name (GST_ELEMENT (visual));
if (g_ascii_strncasecmp (name, "visualglprojectm", 16) == 0
&& !HAVE_PROJECTM_TAKING_CARE_OF_EXTERNAL_FBO)
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, 0);
g_free (name);
actor_negotiate (visual->display, visual);
if (visual->is_enabled_gl_depth_test) {
glEnable (GL_DEPTH_TEST);
glDepthFunc (visual->gl_depth_func);
}
if (visual->is_enabled_gl_blend) {
glEnable (GL_BLEND);
glBlendFunc (visual->gl_blend_src_alpha, GL_ZERO);
}
visual_actor_run (visual->actor, visual->audio);
check_gl_matrix ();
glMatrixMode (GL_PROJECTION);
glPopMatrix ();
glMatrixMode (GL_MODELVIEW);
glPopMatrix ();
glPopAttrib ();
glDisable (GL_DEPTH_TEST);
glDisable (GL_BLEND);
/*glDisable (GL_LIGHT0);
glDisable (GL_LIGHTING);
glDisable (GL_POLYGON_OFFSET_FILL);
glDisable (GL_COLOR_MATERIAL);
glDisable (GL_CULL_FACE); */
GST_DEBUG_OBJECT (visual, "rendered one frame");
}
static void
bottom_up_to_top_down (gint width, gint height, guint texture,
GstVisualGL * visual)
{
glEnable (GL_TEXTURE_2D);
glBindTexture (GL_TEXTURE_2D, texture);
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode (GL_PROJECTION);
glLoadIdentity ();
glBegin (GL_QUADS);
glTexCoord2i (0, 0);
glVertex2i (-1, 1);
glTexCoord2i (width, 0);
glVertex2i (1, 1);
glTexCoord2i (width, height);
glVertex2i (1, -1);
glTexCoord2i (0, height);
glVertex2i (-1, -1);
glEnd ();
glBindTexture (GL_TEXTURE_2D, 0);
glDisable (GL_TEXTURE_2D);
GST_DEBUG_OBJECT (visual, "bottom up to top down");
}
static GstFlowReturn
gst_visual_gl_chain (GstPad * pad, GstBuffer * buffer)
{
GstGLBuffer *outbuf = NULL;
GstVisualGL *visual = GST_VISUAL_GL (gst_pad_get_parent (pad));
GstFlowReturn ret = GST_FLOW_OK;
guint avail;
GST_DEBUG_OBJECT (visual, "chain function called");
/* If we don't have an output format yet, preallocate a buffer to try and
* set one */
if (GST_PAD_CAPS (visual->srcpad) == NULL) {
ret = get_buffer (visual, &outbuf);
if (ret != GST_FLOW_OK) {
gst_buffer_unref (buffer);
goto beach;
}
}
/* resync on DISCONT */
if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT)) {
gst_adapter_clear (visual->adapter);
}
GST_DEBUG_OBJECT (visual,
"Input buffer has %d samples, time=%" G_GUINT64_FORMAT,
GST_BUFFER_SIZE (buffer) / visual->bps, GST_BUFFER_TIMESTAMP (buffer));
gst_adapter_push (visual->adapter, buffer);
while (TRUE) {
gboolean need_skip;
guint64 dist, timestamp;
GST_DEBUG_OBJECT (visual, "processing buffer");
avail = gst_adapter_available (visual->adapter);
GST_DEBUG_OBJECT (visual, "avail now %u", avail);
/* we need at least VISUAL_SAMPLES samples */
if (avail < VISUAL_SAMPLES * visual->bps)
break;
/* we need at least enough samples to make one frame */
if (avail < visual->spf * visual->bps)
break;
/* get timestamp of the current adapter byte */
timestamp = gst_adapter_prev_timestamp (visual->adapter, &dist);
if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
/* convert bytes to time */
dist /= visual->bps;
timestamp += gst_util_uint64_scale_int (dist, GST_SECOND, visual->rate);
}
if (timestamp != -1) {
gint64 qostime;
/* QoS is done on running time */
qostime = gst_segment_to_running_time (&visual->segment, GST_FORMAT_TIME,
timestamp);
qostime += visual->duration;
GST_OBJECT_LOCK (visual);
/* check for QoS, don't compute buffers that are known to be late */
need_skip = visual->earliest_time != -1 &&
qostime <= visual->earliest_time;
GST_OBJECT_UNLOCK (visual);
if (need_skip) {
GST_WARNING_OBJECT (visual,
"QoS: skip ts: %" GST_TIME_FORMAT ", earliest: %" GST_TIME_FORMAT,
GST_TIME_ARGS (qostime), GST_TIME_ARGS (visual->earliest_time));
goto skip;
}
}
/* alloc a buffer if we don't have one yet, this happens
* when we pushed a buffer in this while loop before */
if (outbuf == NULL) {
ret = get_buffer (visual, &outbuf);
if (ret != GST_FLOW_OK) {
goto beach;
}
}
/* render libvisual plugin to our target */
gst_gl_display_use_fbo_v2 (visual->display,
visual->width, visual->height, visual->fbo, visual->depthbuffer,
visual->midtexture, (GLCB_V2) render_frame, (gpointer *) visual);
/* gst video is top-down whereas opengl plan is bottom up */
gst_gl_display_use_fbo (visual->display,
visual->width, visual->height, visual->fbo, visual->depthbuffer,
outbuf->texture, (GLCB) bottom_up_to_top_down,
visual->width, visual->height, visual->midtexture,
0, visual->width, 0, visual->height, GST_GL_DISPLAY_PROJECTION_ORTHO2D,
(gpointer *) visual);
GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
GST_BUFFER_DURATION (outbuf) = visual->duration;
ret = gst_pad_push (visual->srcpad, GST_BUFFER (outbuf));
outbuf = NULL;
skip:
GST_DEBUG_OBJECT (visual, "finished frame, flushing %u samples from input",
visual->spf);
/* Flush out the number of samples per frame */
gst_adapter_flush (visual->adapter, visual->spf * visual->bps);
/* quit the loop if something was wrong */
if (ret != GST_FLOW_OK)
break;
}
beach:
if (outbuf != NULL)
gst_gl_buffer_unref (outbuf);
gst_object_unref (visual);
return ret;
}
static GstStateChangeReturn
gst_visual_gl_change_state (GstElement * element, GstStateChange transition)
{
GstVisualGL *visual = GST_VISUAL_GL (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
{
GstElement *parent = GST_ELEMENT (gst_element_get_parent (visual));
GstStructure *structure = NULL;
GstQuery *query = NULL;
gboolean isPerformed = FALSE;
gchar *name;
if (!parent) {
GST_ELEMENT_ERROR (visual, CORE, STATE_CHANGE, (NULL),
("A parent bin is required"));
return FALSE;
}
name = gst_element_get_name (visual);
structure = gst_structure_new (name, NULL);
query = gst_query_new_application (GST_QUERY_CUSTOM, structure);
g_free (name);
isPerformed = gst_element_query (parent, query);
if (isPerformed) {
const GValue *id_value =
gst_structure_get_value (structure, "gstgldisplay");
if (G_VALUE_HOLDS_POINTER (id_value))
/* at least one gl element is after in our gl chain */
visual->display =
gst_object_ref (GST_GL_DISPLAY (g_value_get_pointer (id_value)));
else {
/* this gl filter is a sink in terms of the gl chain */
visual->display = gst_gl_display_new ();
gst_gl_display_create_context (visual->display, 0);
//TODO visual->external_gl_context);
}
gst_visual_gl_reset (visual);
visual->actor =
visual_actor_new (GST_VISUAL_GL_GET_CLASS (visual)->plugin->info->
plugname);
visual->video = visual_video_new ();
visual->audio = visual_audio_new ();
if (!visual->actor || !visual->video)
goto actor_setup_failed;
gst_gl_display_thread_add (visual->display,
(GstGLDisplayThreadFunc) actor_setup, visual);
if (visual->actor_setup_result != 0)
goto actor_setup_failed;
else
visual_actor_set_video (visual->actor, visual->video);
}
gst_query_unref (query);
gst_object_unref (GST_OBJECT (parent));
if (!isPerformed)
return GST_STATE_CHANGE_FAILURE;
}
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
{
if (visual->fbo) {
gst_gl_display_del_fbo (visual->display, visual->fbo,
visual->depthbuffer);
visual->fbo = 0;
visual->depthbuffer = 0;
}
if (visual->midtexture) {
gst_gl_display_del_texture (visual->display, visual->midtexture,
visual->width, visual->height);
visual->midtexture = 0;
}
if (visual->display) {
gst_object_unref (visual->display);
visual->display = NULL;
}
gst_visual_gl_clear_actors (visual);
}
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
/* ERRORS */
actor_setup_failed:
{
GST_ELEMENT_ERROR (visual, LIBRARY, INIT, (NULL),
("could not set up actor"));
gst_visual_gl_clear_actors (visual);
return GST_STATE_CHANGE_FAILURE;
}
}
static void
make_valid_name (char *name)
{
/*
* Replace invalid chars with _ in the type name
*/
static const gchar extra_chars[] = "-_+";
gchar *p = name;
for (; *p; p++) {
int valid = ((p[0] >= 'A' && p[0] <= 'Z') ||
(p[0] >= 'a' && p[0] <= 'z') ||
(p[0] >= '0' && p[0] <= '9') || strchr (extra_chars, p[0]));
if (!valid)
*p = '_';
}
}
static gboolean
gst_visual_gl_actor_plugin_is_gl (VisObject * plugin, const gchar * name)
{
gboolean is_gl;
gint depth;
depth = VISUAL_ACTOR_PLUGIN (plugin)->vidoptions.depth;
is_gl = (depth & VISUAL_VIDEO_DEPTH_GL) != 0;
if (!is_gl) {
GST_DEBUG ("plugin %s is not a GL plugin (%d), ignoring", name, depth);
} else {
GST_DEBUG ("plugin %s is a GL plugin (%d), registering", name, depth);
}
return is_gl;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
guint i, count;
VisList *list;
GST_DEBUG_CATEGORY_INIT (libvisual_debug, "libvisual", 0,
"libvisual audio visualisations");
#ifdef LIBVISUAL_PLUGINSBASEDIR
gst_plugin_add_dependency_simple (plugin, "HOME/.libvisual/actor",
LIBVISUAL_PLUGINSBASEDIR "/actor", NULL, GST_PLUGIN_DEPENDENCY_FLAG_NONE);
#endif
visual_log_set_verboseness (VISUAL_LOG_VERBOSENESS_LOW);
visual_log_set_info_handler (libvisual_log_handler, (void *) GST_LEVEL_INFO);
visual_log_set_warning_handler (libvisual_log_handler,
(void *) GST_LEVEL_WARNING);
visual_log_set_critical_handler (libvisual_log_handler,
(void *) GST_LEVEL_ERROR);
visual_log_set_error_handler (libvisual_log_handler,
(void *) GST_LEVEL_ERROR);
if (!visual_is_initialized ())
if (visual_init (NULL, NULL) != 0)
return FALSE;
list = visual_actor_get_list ();
count = visual_collection_size (VISUAL_COLLECTION (list));
for (i = 0; i < count; i++) {
VisPluginRef *ref = visual_list_get (list, i);
VisPluginData *visplugin = NULL;
gboolean skip = FALSE;
GType type;
gchar *name;
GTypeInfo info = {
sizeof (GstVisualGLClass),
NULL,
NULL,
gst_visual_gl_class_init,
NULL,
ref,
sizeof (GstVisualGL),
0,
NULL
};
visplugin = visual_plugin_load (ref);
if (ref->info->plugname == NULL)
continue;
/* Blacklist some plugins */
if (strcmp (ref->info->plugname, "gstreamer") == 0 ||
strcmp (ref->info->plugname, "gdkpixbuf") == 0) {
skip = TRUE;
} else {
/* only register plugins that support GL */
skip = !(gst_visual_gl_actor_plugin_is_gl (visplugin->info->plugin,
visplugin->info->plugname));
}
visual_plugin_unload (visplugin);
if (!skip) {
name = g_strdup_printf ("GstVisualGL%s", ref->info->plugname);
make_valid_name (name);
type = g_type_register_static (GST_TYPE_VISUAL_GL, name, &info, 0);
g_free (name);
name = g_strdup_printf ("libvisual_gl_%s", ref->info->plugname);
make_valid_name (name);
if (!gst_element_register (plugin, name, GST_RANK_NONE, type)) {
g_free (name);
return FALSE;
}
g_free (name);
}
}
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"libvisual-gl",
"libvisual-gl visualization plugins",
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)