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cinnamon-recorder.c
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cinnamon-recorder.c
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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
#include "config.h"
#include <fcntl.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#define GST_USE_UNSTABLE_API
#include <gst/gst.h>
#include <gtk/gtk.h>
#include <cogl/cogl.h>
#include <meta/meta-cursor-tracker.h>
#include <meta/display.h>
#include <meta/compositor-mutter.h>
#include <st/st.h>
#include "cinnamon-global.h"
#include "cinnamon-recorder-src.h"
#include "cinnamon-recorder.h"
#include "cinnamon-util.h"
typedef enum {
RECORDER_STATE_CLOSED,
RECORDER_STATE_RECORDING
} RecorderState;
typedef struct _RecorderPipeline RecorderPipeline;
struct _CinnamonRecorderClass
{
GObjectClass parent_class;
};
struct _CinnamonRecorder {
GObject parent;
/* A "maximum" amount of memory to use for buffering. This is used
* to alert the user that they are filling up memory rather than
* any that actually affects recording. (In kB)
*/
guint memory_target;
guint memory_used; /* Current memory used. (In kB) */
RecorderState state;
ClutterStage *stage;
gboolean custom_area;
cairo_rectangle_int_t area;
int stage_width;
int stage_height;
int capture_width;
int capture_height;
float scale;
int pointer_x;
int pointer_y;
gboolean draw_cursor;
MetaCursorTracker *cursor_tracker;
cairo_surface_t *cursor_image;
guint8 *cursor_memory;
int cursor_hot_x;
int cursor_hot_y;
int framerate;
char *pipeline_description;
char *file_template;
/* We might have multiple pipelines that are finishing encoding
* to go along with the current pipeline where we are recording.
*/
RecorderPipeline *current_pipeline; /* current pipeline */
GSList *pipelines; /* all pipelines */
GstClockTime last_frame_time; /* Timestamp for the last frame */
/* GSource IDs for different timeouts and idles */
guint redraw_timeout;
guint redraw_idle;
guint update_memory_used_timeout;
guint update_pointer_timeout;
guint repaint_hook_id;
};
struct _RecorderPipeline
{
CinnamonRecorder *recorder;
GstElement *pipeline;
GstElement *src;
int outfile;
char *filename;
};
static void recorder_set_stage (CinnamonRecorder *recorder,
ClutterStage *stage);
static void recorder_set_framerate (CinnamonRecorder *recorder,
int framerate);
static void recorder_set_pipeline (CinnamonRecorder *recorder,
const char *pipeline);
static void recorder_set_file_template (CinnamonRecorder *recorder,
const char *file_template);
static void recorder_set_draw_cursor (CinnamonRecorder *recorder,
gboolean draw_cursor);
static void recorder_pipeline_set_caps (RecorderPipeline *pipeline);
static void recorder_pipeline_closed (RecorderPipeline *pipeline);
static void recorder_remove_redraw_timeout (CinnamonRecorder *recorder);
enum {
PROP_0,
PROP_DISPLAY,
PROP_STAGE,
PROP_FRAMERATE,
PROP_PIPELINE,
PROP_FILE_TEMPLATE,
PROP_DRAW_CURSOR
};
G_DEFINE_TYPE(CinnamonRecorder, cinnamon_recorder, G_TYPE_OBJECT);
/* The default value of the target frame rate; we'll never record more
* than this many frames per second, though we may record less if the
* screen isn't being redrawn. 30 is a compromise between smoothness
* and the size of the recording.
*/
#define DEFAULT_FRAMES_PER_SECOND 30
/* The time (in milliseconds) between querying the server for the cursor
* position.
*/
#define UPDATE_POINTER_TIME 100
/* The time we wait (in milliseconds) before redrawing when the memory used
* changes.
*/
#define UPDATE_MEMORY_USED_DELAY 500
/* Maximum time between frames, in milliseconds. If we don't send data
* for a long period of time, then when we send the next frame, a lot
* of work can be created for the encoder to do, so we want to force a
* periodic redraw when nothing happen.
*/
#define MAXIMUM_PAUSE_TIME 1000
/* The default pipeline.
*/
#define DEFAULT_PIPELINE "vp8enc min_quantizer=13 max_quantizer=13 cpu-used=5 deadline=1000000 threads=%T ! queue ! webmmux"
/* If we can find the amount of memory on the machine, we use half
* of that for memory_target, otherwise, we use this value, in kB.
*/
#define DEFAULT_MEMORY_TARGET (512*1024)
static guint
get_memory_target (void)
{
FILE *f;
/* Really simple "get amount of memory on the machine" if it
* doesn't work, you just get the default memory target.
*/
f = fopen("/proc/meminfo", "r");
if (!f)
return DEFAULT_MEMORY_TARGET;
while (!feof(f))
{
gchar line_buffer[1024];
guint mem_total;
if (fscanf(f, "MemTotal: %u", &mem_total) == 1)
{
fclose(f);
return mem_total / 2;
}
/* Skip to the next line and discard what we read */
if (fgets(line_buffer, sizeof(line_buffer), f) == NULL)
break;
}
fclose(f);
return DEFAULT_MEMORY_TARGET;
}
/*
* Used to force full stage redraws during recording to avoid artifacts
*
* Note: That this will cause the stage to be repainted on
* every animation frame even if the frame wouldn't normally cause any new
* drawing
*/
static gboolean
recorder_repaint_hook (gpointer data)
{
ClutterActor *stage = data;
clutter_actor_queue_redraw (stage);
return TRUE;
}
static void
cinnamon_recorder_init (CinnamonRecorder *recorder)
{
/* Calling gst_init() is a no-op if GStreamer was previously initialized */
gst_init (NULL, NULL);
cinnamon_recorder_src_register ();
recorder->memory_target = get_memory_target();
recorder->state = RECORDER_STATE_CLOSED;
recorder->framerate = DEFAULT_FRAMES_PER_SECOND;
recorder->draw_cursor = TRUE;
}
static void
cinnamon_recorder_finalize (GObject *object)
{
CinnamonRecorder *recorder = CINNAMON_RECORDER (object);
if (recorder->update_memory_used_timeout) {
g_source_remove (recorder->update_memory_used_timeout);
recorder->update_memory_used_timeout = 0;
}
if (recorder->cursor_image)
cairo_surface_destroy (recorder->cursor_image);
if (recorder->cursor_memory)
g_free (recorder->cursor_memory);
recorder_set_stage (recorder, NULL);
recorder_set_pipeline (recorder, NULL);
recorder_set_file_template (recorder, NULL);
recorder_remove_redraw_timeout (recorder);
G_OBJECT_CLASS (cinnamon_recorder_parent_class)->finalize (object);
}
static void
recorder_on_stage_destroy (ClutterActor *actor,
CinnamonRecorder *recorder)
{
recorder_set_stage (recorder, NULL);
}
/* Add together the memory used by all pipelines; both the
* currently recording pipeline and pipelines finishing
* recording asynchronously.
*/
static void
recorder_update_memory_used (CinnamonRecorder *recorder,
gboolean repaint)
{
guint memory_used = 0;
GSList *l;
for (l = recorder->pipelines; l; l = l->next)
{
RecorderPipeline *pipeline = l->data;
guint pipeline_memory_used;
g_object_get (pipeline->src,
"memory-used", &pipeline_memory_used,
NULL);
memory_used += pipeline_memory_used;
}
if (memory_used != recorder->memory_used)
recorder->memory_used = memory_used;
}
/* Timeout used to avoid not drawing for more than MAXIMUM_PAUSE_TIME
*/
static gboolean
recorder_redraw_timeout (gpointer data)
{
CinnamonRecorder *recorder = data;
recorder->redraw_timeout = 0;
clutter_actor_queue_redraw (CLUTTER_ACTOR (recorder->stage));
return FALSE;
}
static void
recorder_add_redraw_timeout (CinnamonRecorder *recorder)
{
if (recorder->redraw_timeout == 0)
{
recorder->redraw_timeout = g_timeout_add (MAXIMUM_PAUSE_TIME,
recorder_redraw_timeout,
recorder);
}
}
static void
recorder_remove_redraw_timeout (CinnamonRecorder *recorder)
{
if (recorder->redraw_timeout != 0)
{
g_source_remove (recorder->redraw_timeout);
recorder->redraw_timeout = 0;
}
}
static void
recorder_fetch_cursor_image (CinnamonRecorder *recorder)
{
CoglTexture *texture;
int width, height;
int stride;
guint8 *data;
texture = meta_cursor_tracker_get_sprite (recorder->cursor_tracker);
if (!texture)
return;
meta_cursor_tracker_get_hot (recorder->cursor_tracker,
&recorder->cursor_hot_x, &recorder->cursor_hot_y);
width = cogl_texture_get_width (texture);
height = cogl_texture_get_height (texture);
stride = 4 * width;
data = g_new (guint8, stride * height);
cogl_texture_get_data (texture, CLUTTER_CAIRO_FORMAT_ARGB32, stride, data);
/* FIXME: cairo-gl? */
recorder->cursor_image = cairo_image_surface_create_for_data (data,
CAIRO_FORMAT_ARGB32,
width, height,
stride);
recorder->cursor_memory = data;
}
/* Overlay the cursor image on the frame. We draw the cursor image
* into the host-memory buffer after we've captured the frame. An
* alternate approach would be to turn off the cursor while recording
* and draw the cursor ourselves with GL, but then we'd need to figure
* out what the cursor looks like, or hard-code a non-system cursor.
*/
static void
recorder_draw_cursor (CinnamonRecorder *recorder,
GstBuffer *buffer)
{
GstMapInfo info;
cairo_surface_t *surface;
cairo_t *cr;
/* We don't show a cursor unless the hot spot is in the frame; this
* means that sometimes we aren't going to draw a cursor even when
* there is a little bit overlapping within the stage */
if (recorder->pointer_x < recorder->area.x ||
recorder->pointer_y < recorder->area.y ||
recorder->pointer_x >= recorder->area.x + recorder->area.width ||
recorder->pointer_y >= recorder->area.y + recorder->area.height)
return;
if (!recorder->cursor_image)
recorder_fetch_cursor_image (recorder);
if (!recorder->cursor_image)
return;
gst_buffer_map (buffer, &info, GST_MAP_WRITE);
surface = cairo_image_surface_create_for_data (info.data,
CAIRO_FORMAT_ARGB32,
recorder->area.width,
recorder->area.height,
recorder->area.width * 4);
cr = cairo_create (surface);
cairo_set_source_surface (cr,
recorder->cursor_image,
recorder->pointer_x - recorder->cursor_hot_x - recorder->area.x,
recorder->pointer_y - recorder->cursor_hot_y - recorder->area.y);
cairo_paint (cr);
cairo_destroy (cr);
cairo_surface_destroy (surface);
gst_buffer_unmap (buffer, &info);
}
/* Retrieve a frame and feed it into the pipeline
*/
static void
recorder_record_frame (CinnamonRecorder *recorder,
gboolean paint)
{
GstBuffer *buffer;
ClutterCapture *captures;
int n_captures;
cairo_surface_t *image;
guint size;
uint8_t *data;
GstMemory *memory;
int i;
GstClock *clock;
GstClockTime now, base_time;
g_return_if_fail (recorder->current_pipeline != NULL);
/* If we get into the red zone, stop buffering new frames; 13/16 is
* a bit more than the 3/4 threshold for a red indicator to keep the
* indicator from flashing between red and yellow. */
if (recorder->memory_used > (recorder->memory_target * 13) / 16)
return;
/* Drop frames to get down to something like the target frame rate; since frames
* are generated with VBlank sync, we don't have full control anyways, so we just
* drop frames if the interval since the last frame is less than 75% of the
* desired inter-frame interval.
*/
clock = gst_element_get_clock (recorder->current_pipeline->src);
/* If we have no clock yet, the pipeline is not yet in PLAYING */
if (!clock)
return;
base_time = gst_element_get_base_time (recorder->current_pipeline->src);
now = gst_clock_get_time (clock) - base_time;
gst_object_unref (clock);
if (GST_CLOCK_TIME_IS_VALID (recorder->last_frame_time) &&
now - recorder->last_frame_time < gst_util_uint64_scale_int (GST_SECOND, 3, 4 * recorder->framerate))
return;
recorder->last_frame_time = now;
if (!clutter_stage_capture (recorder->stage, paint, &recorder->area,
&captures, &n_captures))
return;
if (n_captures == 1)
image = cairo_surface_reference (captures[0].image);
else
image = cinnamon_util_composite_capture_images (captures,
n_captures,
recorder->area.x,
recorder->area.y,
recorder->capture_width,
recorder->capture_height,
recorder->scale);
data = cairo_image_surface_get_data (image);
size = (cairo_image_surface_get_height (image) *
cairo_image_surface_get_stride (image));
for (i = 0; i < n_captures; i++)
cairo_surface_destroy (captures[i].image);
g_free (captures);
buffer = gst_buffer_new();
memory = gst_memory_new_wrapped (0, data, size, 0, size,
image,
(GDestroyNotify) cairo_surface_destroy);
gst_buffer_insert_memory (buffer, -1, memory);
GST_BUFFER_PTS(buffer) = now;
if (recorder->draw_cursor)
{
StSettings *settings = st_settings_get ();
gboolean magnifier_active = FALSE;
g_object_get (settings, "magnifier-active", &magnifier_active, NULL);
if (!magnifier_active)
recorder_draw_cursor (recorder, buffer);
}
cinnamon_recorder_src_add_buffer (CINNAMON_RECORDER_SRC (recorder->current_pipeline->src), buffer);
gst_buffer_unref (buffer);
/* Reset the timeout that we used to avoid an overlong pause in the stream */
recorder_remove_redraw_timeout (recorder);
recorder_add_redraw_timeout (recorder);
}
/* We hook in by recording each frame right after the stage is painted
* by clutter before glSwapBuffers() makes it visible to the user.
*/
static void
recorder_on_stage_after_paint (ClutterActor *actor,
CinnamonRecorder *recorder)
{
if (recorder->state == RECORDER_STATE_RECORDING)
recorder_record_frame (recorder, FALSE);
}
static void
recorder_update_size (CinnamonRecorder *recorder)
{
ClutterActorBox allocation;
clutter_actor_get_allocation_box (CLUTTER_ACTOR (recorder->stage), &allocation);
recorder->stage_width = (int)(0.5 + allocation.x2 - allocation.x1);
recorder->stage_height = (int)(0.5 + allocation.y2 - allocation.y1);
if (!recorder->custom_area)
{
recorder->area.x = 0;
recorder->area.y = 0;
recorder->area.width = recorder->stage_width;
recorder->area.height = recorder->stage_height;
clutter_stage_get_capture_final_size (recorder->stage, NULL,
&recorder->capture_width,
&recorder->capture_height,
&recorder->scale);
}
}
static void
recorder_on_stage_notify_size (GObject *object,
GParamSpec *pspec,
CinnamonRecorder *recorder)
{
recorder_update_size (recorder);
/* This breaks the recording but tweaking the GStreamer pipeline a bit
* might make it work, at least if the codec can handle a stream where
* the frame size changes in the middle.
*/
if (recorder->current_pipeline)
recorder_pipeline_set_caps (recorder->current_pipeline);
}
static gboolean
recorder_idle_redraw (gpointer data)
{
CinnamonRecorder *recorder = data;
recorder->redraw_idle = 0;
clutter_actor_queue_redraw (CLUTTER_ACTOR (recorder->stage));
return FALSE;
}
static void
recorder_queue_redraw (CinnamonRecorder *recorder)
{
/* If we just queue a redraw on every mouse motion (for example), we
* starve Clutter, which operates at a very low priority. So
* we need to queue a "low priority redraw" after timeline updates
*/
if (recorder->state == RECORDER_STATE_RECORDING && recorder->redraw_idle == 0)
{
recorder->redraw_idle = g_idle_add_full (CLUTTER_PRIORITY_REDRAW + 1,
recorder_idle_redraw, recorder, NULL);
}
}
static void
on_cursor_changed (MetaCursorTracker *tracker,
CinnamonRecorder *recorder)
{
if (recorder->cursor_image)
{
cairo_surface_destroy (recorder->cursor_image);
recorder->cursor_image = NULL;
}
if (recorder->cursor_memory)
{
g_free (recorder->cursor_memory);
recorder->cursor_memory = NULL;
}
recorder_queue_redraw (recorder);
}
static void
recorder_update_pointer (CinnamonRecorder *recorder)
{
int pointer_x, pointer_y;
meta_cursor_tracker_get_pointer (recorder->cursor_tracker, &pointer_x, &pointer_y, NULL);
if (pointer_x != recorder->pointer_x || pointer_y != recorder->pointer_y)
{
recorder->pointer_x = pointer_x;
recorder->pointer_y = pointer_y;
recorder_queue_redraw (recorder);
}
}
static gboolean
recorder_update_pointer_timeout (gpointer data)
{
recorder_update_pointer (data);
return TRUE;
}
static void
recorder_add_update_pointer_timeout (CinnamonRecorder *recorder)
{
if (!recorder->update_pointer_timeout)
recorder->update_pointer_timeout = g_timeout_add (UPDATE_POINTER_TIME,
recorder_update_pointer_timeout,
recorder);
}
static void
recorder_remove_update_pointer_timeout (CinnamonRecorder *recorder)
{
if (recorder->update_pointer_timeout)
{
g_source_remove (recorder->update_pointer_timeout);
recorder->update_pointer_timeout = 0;
}
}
static void
recorder_connect_stage_callbacks (CinnamonRecorder *recorder)
{
g_signal_connect (recorder->stage, "destroy",
G_CALLBACK (recorder_on_stage_destroy), recorder);
g_signal_connect_after (recorder->stage, "after-paint",
G_CALLBACK (recorder_on_stage_after_paint), recorder);
g_signal_connect (recorder->stage, "notify::width",
G_CALLBACK (recorder_on_stage_notify_size), recorder);
g_signal_connect (recorder->stage, "notify::height",
G_CALLBACK (recorder_on_stage_notify_size), recorder);
g_signal_connect (recorder->stage, "notify::resource-scale",
G_CALLBACK (recorder_on_stage_notify_size), recorder);
}
static void
recorder_disconnect_stage_callbacks (CinnamonRecorder *recorder)
{
g_signal_handlers_disconnect_by_func (recorder->stage,
(void *)recorder_on_stage_destroy,
recorder);
g_signal_handlers_disconnect_by_func (recorder->stage,
(void *)recorder_on_stage_after_paint,
recorder);
g_signal_handlers_disconnect_by_func (recorder->stage,
(void *)recorder_on_stage_notify_size,
recorder);
/* We don't don't deselect for cursor changes in case someone else just
* happened to be selecting for cursor events on the same window; sending
* us the events is close to free in any case.
*/
g_clear_handle_id (&recorder->redraw_idle, g_source_remove);
}
static void
recorder_set_stage (CinnamonRecorder *recorder,
ClutterStage *stage)
{
if (recorder->stage == stage)
return;
if (recorder->current_pipeline)
cinnamon_recorder_close (recorder);
if (recorder->stage)
recorder_disconnect_stage_callbacks (recorder);
recorder->stage = stage;
if (recorder->stage)
recorder_update_size (recorder);
}
static void
recorder_set_display (CinnamonRecorder *recorder,
MetaDisplay *display)
{
MetaCursorTracker *tracker;
tracker = meta_cursor_tracker_get_for_display (display);
if (tracker == recorder->cursor_tracker)
return;
recorder->cursor_tracker = tracker;
g_signal_connect_object (tracker, "cursor-changed",
G_CALLBACK (on_cursor_changed), recorder, 0);
}
static void
recorder_set_framerate (CinnamonRecorder *recorder,
int framerate)
{
if (framerate == recorder->framerate)
return;
if (recorder->current_pipeline)
cinnamon_recorder_close (recorder);
recorder->framerate = framerate;
g_object_notify (G_OBJECT (recorder), "framerate");
}
static void
recorder_set_pipeline (CinnamonRecorder *recorder,
const char *pipeline)
{
if (pipeline == recorder->pipeline_description ||
(pipeline && recorder->pipeline_description && strcmp (recorder->pipeline_description, pipeline) == 0))
return;
if (recorder->current_pipeline)
cinnamon_recorder_close (recorder);
if (recorder->pipeline_description)
g_free (recorder->pipeline_description);
recorder->pipeline_description = g_strdup (pipeline);
g_object_notify (G_OBJECT (recorder), "pipeline");
}
static void
recorder_set_file_template (CinnamonRecorder *recorder,
const char *file_template)
{
if (file_template == recorder->file_template ||
(file_template && recorder->file_template && strcmp (recorder->file_template, file_template) == 0))
return;
if (recorder->current_pipeline)
cinnamon_recorder_close (recorder);
if (recorder->file_template)
g_free (recorder->file_template);
recorder->file_template = g_strdup (file_template);
g_object_notify (G_OBJECT (recorder), "file-template");
}
static void
recorder_set_draw_cursor (CinnamonRecorder *recorder,
gboolean draw_cursor)
{
if (draw_cursor == recorder->draw_cursor)
return;
recorder->draw_cursor = draw_cursor;
g_object_notify (G_OBJECT (recorder), "draw-cursor");
}
static void
cinnamon_recorder_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
CinnamonRecorder *recorder = CINNAMON_RECORDER (object);
switch (prop_id)
{
case PROP_DISPLAY:
recorder_set_display (recorder, g_value_get_object (value));
break;
case PROP_STAGE:
recorder_set_stage (recorder, g_value_get_object (value));
break;
case PROP_FRAMERATE:
recorder_set_framerate (recorder, g_value_get_int (value));
break;
case PROP_PIPELINE:
recorder_set_pipeline (recorder, g_value_get_string (value));
break;
case PROP_FILE_TEMPLATE:
recorder_set_file_template (recorder, g_value_get_string (value));
break;
case PROP_DRAW_CURSOR:
recorder_set_draw_cursor (recorder, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
cinnamon_recorder_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
CinnamonRecorder *recorder = CINNAMON_RECORDER (object);
switch (prop_id)
{
case PROP_STAGE:
g_value_set_object (value, G_OBJECT (recorder->stage));
break;
case PROP_FRAMERATE:
g_value_set_int (value, recorder->framerate);
break;
case PROP_PIPELINE:
g_value_set_string (value, recorder->pipeline_description);
break;
case PROP_FILE_TEMPLATE:
g_value_set_string (value, recorder->file_template);
break;
case PROP_DRAW_CURSOR:
g_value_set_boolean (value, recorder->draw_cursor);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
cinnamon_recorder_class_init (CinnamonRecorderClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->finalize = cinnamon_recorder_finalize;
gobject_class->get_property = cinnamon_recorder_get_property;
gobject_class->set_property = cinnamon_recorder_set_property;
g_object_class_install_property (gobject_class,
PROP_DISPLAY,
g_param_spec_object ("display",
"Display",
"Display to record",
META_TYPE_DISPLAY,
G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_STAGE,
g_param_spec_object ("stage",
"Stage",
"Stage to record",
CLUTTER_TYPE_STAGE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_FRAMERATE,
g_param_spec_int ("framerate",
"Framerate",
"Framerate used for resulting video in frames-per-second",
0,
G_MAXINT,
DEFAULT_FRAMES_PER_SECOND,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_PIPELINE,
g_param_spec_string ("pipeline",
"Pipeline",
"GStreamer pipeline description to encode recordings",
NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_FILE_TEMPLATE,
g_param_spec_string ("file-template",
"File Template",
"The filename template to use for output files",
NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_DRAW_CURSOR,
g_param_spec_boolean ("draw-cursor",
"Draw Cursor",
"Whether to record the cursor",
TRUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
/* Sets the GstCaps (video format, in this case) on the stream
*/
static void
recorder_pipeline_set_caps (RecorderPipeline *pipeline)
{
CinnamonRecorder *recorder = pipeline->recorder;
GstCaps *caps;
/* The data is always native-endian xRGB; videoconvert
* doesn't support little-endian xRGB, but does support
* big-endian BGRx.
*/
caps = gst_caps_new_simple ("video/x-raw",
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
"format", G_TYPE_STRING, "BGRx",
#else
"format", G_TYPE_STRING, "xRGB",
#endif
"framerate", GST_TYPE_FRACTION, recorder->framerate, 1,
"width", G_TYPE_INT, recorder->capture_width,
"height", G_TYPE_INT, recorder->capture_height,
NULL);
g_object_set (pipeline->src, "caps", caps, NULL);
gst_caps_unref (caps);
}
/* Augments the supplied pipeline with the source elements: the actual
* CinnamonRecorderSrc element where we inject frames then additional elements
* to convert the output into something palatable.
*/
static gboolean
recorder_pipeline_add_source (RecorderPipeline *pipeline)
{
GstPad *sink_pad = NULL, *src_pad = NULL;
gboolean result = FALSE;
GstElement *videoconvert;
sink_pad = gst_bin_find_unlinked_pad (GST_BIN (pipeline->pipeline), GST_PAD_SINK);
if (sink_pad == NULL)
{
g_warning("CinnamonRecorder: pipeline has no unlinked sink pad");
goto out;
}
pipeline->src = gst_element_factory_make ("cinnamonrecordersrc", NULL);
if (pipeline->src == NULL)
{
g_warning ("Can't create recorder source element");
goto out;
}
gst_bin_add (GST_BIN (pipeline->pipeline), pipeline->src);
recorder_pipeline_set_caps (pipeline);
/* The videoconvert element is a generic converter; it will convert
* our supplied fixed format data into whatever the encoder wants
*/
videoconvert = gst_element_factory_make ("videoconvert", NULL);
if (!videoconvert)
{
g_warning("Can't create videoconvert element");
goto out;
}
gst_bin_add (GST_BIN (pipeline->pipeline), videoconvert);
gst_element_link_many (pipeline->src, videoconvert, NULL);
src_pad = gst_element_get_static_pad (videoconvert, "src");
if (!src_pad)
{
g_warning("CinnamonRecorder: can't get src pad to link into pipeline");
goto out;
}
if (gst_pad_link (src_pad, sink_pad) != GST_PAD_LINK_OK)
{
g_warning("CinnamonRecorder: can't link to sink pad");
goto out;
}
result = TRUE;
out:
if (sink_pad)
gst_object_unref (sink_pad);
if (src_pad)
gst_object_unref (src_pad);
return result;
}
static char *
get_absolute_path (char *maybe_relative)
{
char *path;
if (g_path_is_absolute (maybe_relative))
path = g_strdup (maybe_relative);
else
{
const char *video_dir = g_get_user_special_dir (G_USER_DIRECTORY_VIDEOS);
if (!g_file_test (video_dir, G_FILE_TEST_EXISTS))
video_dir = g_get_home_dir ();
path = g_build_filename (video_dir, maybe_relative, NULL);
}
return path;
}
/* Open a file for writing. Opening the file ourselves and using fdsink has
* the advantage over filesink of being able to use O_EXCL when we want to
* avoid overwriting* an existing file. Returns -1 if the file couldn't
* be opened.
*/
static int
recorder_open_outfile (CinnamonRecorder *recorder,
char **outfilename)
{