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preview.c
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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
/*
* preview.c
* Copyright (C) John Stebbins 2008-2017 <stebbins@stebbins>
*
* preview.c is free software.
*
* You may redistribute it and/or modify it under the terms of the
* GNU General Public License, as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* preview.c 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with main.c. If not, write to:
* The Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301, USA.
*/
#include <unistd.h>
#include <glib.h>
#include <glib/gstdio.h>
#include <glib/gi18n.h>
#include <glib-object.h>
#include "ghbcompat.h"
#if defined(_ENABLE_GST)
#include <gst/gst.h>
#include <gst/video/video.h>
#include <gst/pbutils/missing-plugins.h>
#endif
#include "settings.h"
#include "presets.h"
#include "callbacks.h"
#include "hb-backend.h"
#include "preview.h"
#include "values.h"
#include "queuehandler.h"
#include "hb.h"
#define PREVIEW_STATE_IMAGE 0
#define PREVIEW_STATE_LIVE 1
struct preview_s
{
#if defined(_ENABLE_GST)
GstElement *play;
GstElement *vsink;
#endif
gint64 len;
gint64 pos;
gboolean seek_lock;
gboolean progress_lock;
gint width;
gint height;
gint render_width;
gint render_height;
GtkWidget * view;
GdkPixbuf * pix;
GdkPixbuf * scaled_pix;
gint button_width;
gint button_height;
gint frame;
gint state;
gboolean pause;
gboolean encoded[GHB_PREVIEW_MAX];
gint encode_frame;
gint live_id;
gchar * current;
gint live_enabled;
};
#if defined(_ENABLE_GST)
G_MODULE_EXPORT gboolean live_preview_cb(GstBus *bus, GstMessage *msg, gpointer data);
#endif
void
ghb_screen_par(signal_user_data_t *ud, gint *par_n, gint *par_d)
{
// Assume 1:1
// I could get it from GtkWindow->GdkScreen monitor methods.
// But it's going to be 1:1 anyway, so why bother.
*par_n = 1;
*par_d = 1;
}
void
ghb_par_scale(signal_user_data_t *ud, gint *width, gint *height, gint par_n, gint par_d)
{
gint disp_par_n, disp_par_d;
gint64 num, den;
ghb_screen_par(ud, &disp_par_n, &disp_par_d);
if (disp_par_n < 1 || disp_par_d < 1)
{
disp_par_n = 1;
disp_par_d = 1;
}
num = par_n * disp_par_d;
den = par_d * disp_par_n;
if (par_n > par_d)
*width = *width * num / den;
else
*height = *height * den / num;
}
void
preview_set_size(signal_user_data_t *ud, int width, int height)
{
ud->preview->width = width;
ud->preview->height = height;
}
void
preview_set_render_size(signal_user_data_t *ud, int width, int height)
{
GtkWidget * widget;
GtkWindow * window;
GdkGeometry geo;
widget = GHB_WIDGET (ud->builder, "preview_image");
gtk_widget_set_size_request(widget, width, height);
window = GTK_WINDOW(GHB_WIDGET(ud->builder, "preview_window"));
gtk_window_unmaximize(window);
gtk_window_resize(window, width, height);
geo.min_aspect = (double)(width - 4) / height;
geo.max_aspect = (double)(width + 4) / height;
geo.width_inc = geo.height_inc = 2;
gtk_window_set_geometry_hints(window, NULL, &geo,
GDK_HINT_ASPECT|GDK_HINT_RESIZE_INC);
ud->preview->render_width = width;
ud->preview->render_height = height;
}
void
ghb_preview_init(signal_user_data_t *ud)
{
GtkWidget *widget;
ud->preview = g_malloc0(sizeof(preview_t));
ud->preview->pause = TRUE;
ud->preview->encode_frame = -1;
ud->preview->live_id = -1;
widget = GHB_WIDGET(ud->builder, "preview_button_image");
gtk_widget_get_size_request(widget, &ud->preview->button_width,
&ud->preview->button_height);
#if defined(_ENABLE_GST)
GstBus *bus;
ud->preview->play = gst_element_factory_make("playbin", "play");
ud->preview->vsink = gst_element_factory_make("gdkpixbufsink", "pixsink");
if (ud->preview->play == NULL || ud->preview->vsink == NULL)
{
g_message("Couldn't initialize gstreamer. Disabling live preview.");
GtkWidget *widget = GHB_WIDGET(ud->builder, "live_preview_box");
gtk_widget_hide (widget);
widget = GHB_WIDGET(ud->builder, "live_preview_duration_box");
gtk_widget_hide (widget);
return;
}
else
{
g_object_set(ud->preview->vsink, "qos", FALSE,
"max-lateness", (gint64) - 1, NULL);
g_object_set(ud->preview->play, "video-sink", ud->preview->vsink, NULL);
g_object_set(ud->preview->play, "subtitle-font-desc",
"sans bold 20", NULL);
bus = gst_pipeline_get_bus(GST_PIPELINE(ud->preview->play));
gst_bus_add_watch(bus, live_preview_cb, ud);
gst_object_unref(bus);
ud->preview->live_enabled = 1;
}
#else
widget = GHB_WIDGET(ud->builder, "live_preview_box");
gtk_widget_hide (widget);
widget = GHB_WIDGET(ud->builder, "live_preview_duration_box");
gtk_widget_hide (widget);
#endif
}
void
ghb_preview_cleanup(signal_user_data_t *ud)
{
if (ud->preview->current)
{
g_free(ud->preview->current);
ud->preview->current = NULL;
}
}
#if defined(_ENABLE_GST)
void
live_preview_start(signal_user_data_t *ud)
{
GtkImage *img;
gchar *uri;
if (!ud->preview->live_enabled)
return;
img = GTK_IMAGE(GHB_WIDGET(ud->builder, "live_preview_play_image"));
if (!ud->preview->encoded[ud->preview->frame])
{
gtk_image_set_from_icon_name(img, GHB_PLAY_ICON, GTK_ICON_SIZE_BUTTON);
gst_element_set_state(ud->preview->play, GST_STATE_NULL);
ud->preview->pause = TRUE;
return;
}
if (ud->preview->state != PREVIEW_STATE_LIVE)
{
#if defined(_WIN32)
uri = g_strdup_printf("file:///%s", ud->preview->current);
#else
uri = g_strdup_printf("file://%s", ud->preview->current);
#endif
gtk_image_set_from_icon_name(img, GHB_PAUSE_ICON, GTK_ICON_SIZE_BUTTON);
ud->preview->state = PREVIEW_STATE_LIVE;
g_object_set(G_OBJECT(ud->preview->play), "uri", uri, NULL);
g_free(uri);
}
gst_element_set_state(ud->preview->play, GST_STATE_PLAYING);
ud->preview->pause = FALSE;
}
void
live_preview_pause(signal_user_data_t *ud)
{
GtkImage *img;
if (!ud->preview->live_enabled)
return;
img = GTK_IMAGE(GHB_WIDGET(ud->builder, "live_preview_play_image"));
gtk_image_set_from_icon_name(img, GHB_PLAY_ICON, GTK_ICON_SIZE_BUTTON);
gst_element_set_state(ud->preview->play, GST_STATE_PAUSED);
ud->preview->pause = TRUE;
}
#endif
void
live_preview_stop(signal_user_data_t *ud)
{
GtkImage *img;
GtkRange *progress;
if (!ud->preview->live_enabled)
return;
img = GTK_IMAGE(GHB_WIDGET(ud->builder, "live_preview_play_image"));
gtk_image_set_from_icon_name(img, GHB_PLAY_ICON, GTK_ICON_SIZE_BUTTON);
#if defined(_ENABLE_GST)
gst_element_set_state(ud->preview->play, GST_STATE_NULL);
#endif
ud->preview->pause = TRUE;
ud->preview->state = PREVIEW_STATE_IMAGE;
progress = GTK_RANGE(GHB_WIDGET(ud->builder, "live_preview_progress"));
gtk_range_set_value(progress, 0);
}
void
ghb_live_reset(signal_user_data_t *ud)
{
gboolean encoded;
if (ud->preview->live_id >= 0)
{
ghb_stop_live_encode();
}
ud->preview->live_id = -1;
ud->preview->encode_frame = -1;
if (!ud->preview->pause)
live_preview_stop(ud);
if (ud->preview->current)
{
g_free(ud->preview->current);
ud->preview->current = NULL;
}
encoded = ud->preview->encoded[ud->preview->frame];
memset(ud->preview->encoded, 0, sizeof(gboolean) * GHB_PREVIEW_MAX);
if (encoded)
ghb_set_preview_image(ud);
}
#if defined(_ENABLE_GST)
static void
caps_set(GstCaps *caps, signal_user_data_t *ud)
{
GstStructure *ss;
ss = gst_caps_get_structure(caps, 0);
if (ss)
{
gint fps_n, fps_d, width, height;
guint num, den, par_n, par_d;
gint disp_par_n, disp_par_d;
const GValue *par;
gst_structure_get_fraction(ss, "framerate", &fps_n, &fps_d);
gst_structure_get_int(ss, "width", &width);
gst_structure_get_int(ss, "height", &height);
par = gst_structure_get_value(ss, "pixel-aspect-ratio");
par_n = gst_value_get_fraction_numerator(par);
par_d = gst_value_get_fraction_denominator(par);
ghb_screen_par(ud, &disp_par_n, &disp_par_d);
gst_video_calculate_display_ratio(
&num, &den, width, height, par_n, par_d, disp_par_n, disp_par_d);
if (par_n > par_d)
width = gst_util_uint64_scale_int(height, num, den);
else
height = gst_util_uint64_scale_int(width, den, num);
preview_set_size(ud, width, height);
if (ghb_dict_get_bool(ud->prefs, "reduce_hd_preview"))
{
GdkWindow *window;
gint s_w, s_h;
window = gtk_widget_get_window(
GHB_WIDGET(ud->builder, "preview_window"));
ghb_monitor_get_size(window, &s_w, &s_h);
if (s_w > 0 && s_h > 0)
{
if (width > s_w * 80 / 100)
{
width = s_w * 80 / 100;
height = gst_util_uint64_scale_int(width, den, num);
}
if (height > s_h * 80 / 100)
{
height = s_h * 80 / 100;
width = gst_util_uint64_scale_int(height, num, den);
}
}
}
}
}
static void
update_stream_info(signal_user_data_t *ud)
{
GstPad *vpad = NULL;
gint n_video;
g_object_get(G_OBJECT(ud->preview->play), "n-video", &n_video, NULL);
if (n_video > 0)
{
gint ii;
for (ii = 0; ii < n_video && vpad == NULL; ii++)
{
g_signal_emit_by_name(ud->preview->play, "get-video-pad", ii, &vpad);
}
}
if (vpad)
{
GstCaps *caps;
caps = gst_pad_get_current_caps(vpad);
if (caps)
{
caps_set(caps, ud);
gst_caps_unref(caps);
}
gst_object_unref(vpad);
}
}
G_MODULE_EXPORT gboolean
live_preview_cb(GstBus *bus, GstMessage *msg, gpointer data)
{
signal_user_data_t *ud = (signal_user_data_t*)data;
switch (GST_MESSAGE_TYPE(msg))
{
case GST_MESSAGE_UNKNOWN:
{
//printf("unknown");
} break;
case GST_MESSAGE_EOS:
{
// Done
//printf("eos\n");
live_preview_stop(ud);
gst_element_seek(ud->preview->play, 1.0,
GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_KEY_UNIT,
GST_SEEK_TYPE_SET, 0,
GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE);
} break;
case GST_MESSAGE_ERROR:
{
//printf("error\n");
GError *err;
gchar *debug;
gst_message_parse_error(msg, &err, &debug);
g_warning("Gstreamer Error: %s", err->message);
g_error_free(err);
g_free(debug);
} break;
case GST_MESSAGE_WARNING:
case GST_MESSAGE_INFO:
case GST_MESSAGE_TAG:
case GST_MESSAGE_BUFFERING:
case GST_MESSAGE_STATE_CHANGED:
{
//printf("state change %x\n", state);
GstState state, pending;
gst_element_get_state(ud->preview->play, &state, &pending, 0);
if (state == GST_STATE_PAUSED || state == GST_STATE_PLAYING)
{
update_stream_info(ud);
}
} break;
case GST_MESSAGE_STATE_DIRTY:
{
//printf("state dirty\n");
} break;
case GST_MESSAGE_STEP_DONE:
{
//printf("step done\n");
} break;
case GST_MESSAGE_CLOCK_PROVIDE:
{
//printf("clock provide\n");
} break;
case GST_MESSAGE_CLOCK_LOST:
{
//printf("clock lost\n");
} break;
case GST_MESSAGE_NEW_CLOCK:
{
//printf("new clock\n");
} break;
case GST_MESSAGE_STRUCTURE_CHANGE:
{
//printf("structure change\n");
} break;
case GST_MESSAGE_STREAM_STATUS:
{
//printf("stream status\n");
} break;
case GST_MESSAGE_APPLICATION:
{
//printf("application\n");
} break;
case GST_MESSAGE_ELEMENT:
{
//printf("element\n");
if (gst_is_missing_plugin_message(msg))
{
GtkWindow *hb_window;
hb_window = GTK_WINDOW(GHB_WIDGET(ud->builder, "hb_window"));
gst_element_set_state(ud->preview->play, GST_STATE_PAUSED);
gchar *message, *desc;
desc = gst_missing_plugin_message_get_description(msg);
message = g_strdup_printf(
_("Missing GStreamer plugin\n"
"Audio or Video may not play as expected\n\n%s"),
desc);
ghb_message_dialog(hb_window, GTK_MESSAGE_WARNING,
message, "Ok", NULL);
g_free(message);
gst_element_set_state(ud->preview->play, GST_STATE_PLAYING);
}
else if (msg->src == GST_OBJECT_CAST(ud->preview->vsink))
{
const GstStructure *gstStruct;
const GValue *val;
gstStruct = gst_message_get_structure(msg);
if (gstStruct != NULL &&
(gst_structure_has_name(gstStruct, "preroll-pixbuf") ||
gst_structure_has_name(gstStruct, "pixbuf")))
{
val = gst_structure_get_value(gstStruct, "pixbuf");
if (val != NULL)
{
GdkPixbuf * pix;
GtkWidget *widget;
int width, height;
if (ud->preview->pix != NULL)
g_object_unref(ud->preview->pix);
if (ud->preview->scaled_pix != NULL)
g_object_unref(ud->preview->scaled_pix);
pix = GDK_PIXBUF(g_value_dup_object(val));
width = gdk_pixbuf_get_width(pix);
height = gdk_pixbuf_get_height(pix);
if (width != ud->preview->width ||
height != ud->preview->height ||
width != ud->preview->render_width ||
height != ud->preview->render_height)
{
double xscale, yscale;
xscale = (double)ud->preview->render_width /
ud->preview->width;
yscale = (double)ud->preview->render_height /
ud->preview->height;
if (xscale <= yscale)
{
width = ud->preview->render_width;
height = ud->preview->height * xscale;
}
else
{
width = ud->preview->width * yscale;
height = ud->preview->render_height;
}
ud->preview->scaled_pix =
gdk_pixbuf_scale_simple(pix,
width, height,
GDK_INTERP_BILINEAR);
g_object_ref(pix);
}
else
{
ud->preview->scaled_pix = pix;
}
ud->preview->pix = ud->preview->scaled_pix;
g_object_ref(ud->preview->pix);
widget = GHB_WIDGET (ud->builder, "preview_image");
gtk_widget_queue_draw(widget);
}
}
}
} break;
case GST_MESSAGE_SEGMENT_START:
{
//printf("segment start\n");
} break;
case GST_MESSAGE_SEGMENT_DONE:
{
//printf("segment done\n");
} break;
case GST_MESSAGE_DURATION_CHANGED:
{
//printf("duration change\n");
};
case GST_MESSAGE_LATENCY:
{
//printf("latency\n");
};
case GST_MESSAGE_ASYNC_START:
{
//printf("async start\n");
} break;
case GST_MESSAGE_ASYNC_DONE:
{
//printf("async done\n");
} break;
case GST_MESSAGE_REQUEST_STATE:
{
//printf("request state\n");
} break;
case GST_MESSAGE_STEP_START:
{
//printf("step start\n");
} break;
case GST_MESSAGE_QOS:
{
//printf("qos\n");
} break;
case GST_MESSAGE_PROGRESS:
{
//printf("progress\n");
} break;
case GST_MESSAGE_TOC:
{
//printf("toc\n");
} break;
case GST_MESSAGE_RESET_TIME:
{
//printf("reset time\n");
} break;
case GST_MESSAGE_STREAM_START:
{
//printf("stream start\n");
};
case GST_MESSAGE_ANY:
{
//printf("any\n");
} break;
default:
{
// Ignore
//printf("?msg? %x\n", GST_MESSAGE_TYPE(msg));
}
}
return TRUE;
}
#endif
G_MODULE_EXPORT void
live_preview_start_cb(GtkWidget *xwidget, signal_user_data_t *ud)
{
gchar *tmp_dir;
gchar *name;
gint frame = ud->preview->frame;
tmp_dir = ghb_get_tmp_dir();
name = g_strdup_printf("%s/live%02d", tmp_dir, ud->preview->frame);
if (ud->preview->current)
g_free(ud->preview->current);
ud->preview->current = name;
if (ud->preview->encoded[frame] &&
g_file_test(name, G_FILE_TEST_IS_REGULAR))
{
#if defined(_ENABLE_GST)
if (ud->preview->pause)
live_preview_start(ud);
else
live_preview_pause(ud);
#endif
}
else
{
GhbValue *js;
GhbValue *range, *dest;
ud->preview->encode_frame = frame;
js = ghb_value_dup(ud->settings);
ghb_finalize_job(js);
range = ghb_get_job_range_settings(js);
dest = ghb_get_job_dest_settings(js);
ghb_dict_set_string(dest, "File", name);
ghb_dict_set_string(range, "Type", "preview");
ghb_dict_set_int(range, "Start", ud->preview->frame + 1);
ghb_dict_set_int(range, "End",
ghb_dict_get_int(ud->prefs, "live_duration") * 90000);
ghb_dict_set_int(range, "SeekPoints",
ghb_dict_get_int(ud->prefs, "preview_count"));
GhbValue *job_dict = ghb_dict_get(js, "Job");
ud->preview->live_id = ghb_add_job(ghb_live_handle(), job_dict);
ghb_start_live_encode();
ghb_value_free(&js);
}
}
void
ghb_live_encode_done(signal_user_data_t *ud, gboolean success)
{
GtkWidget *widget;
GtkWidget *prog;
ud->preview->live_id = -1;
prog = GHB_WIDGET(ud->builder, "live_encode_progress");
if (success &&
ud->preview->encode_frame == ud->preview->frame)
{
gtk_progress_bar_set_text(GTK_PROGRESS_BAR(prog), "Done");
gtk_progress_bar_set_fraction (GTK_PROGRESS_BAR(prog), 1);
ud->preview->encoded[ud->preview->encode_frame] = TRUE;
#if defined(_ENABLE_GST)
live_preview_start(ud);
#endif
widget = GHB_WIDGET(ud->builder, "live_progress_box");
gtk_widget_hide (widget);
widget = GHB_WIDGET(ud->builder, "live_preview_progress");
gtk_widget_show (widget);
}
else
{
gtk_progress_bar_set_text(GTK_PROGRESS_BAR(prog), "");
gtk_progress_bar_set_fraction (GTK_PROGRESS_BAR(prog), 0);
ud->preview->encoded[ud->preview->encode_frame] = FALSE;
}
}
#if defined(_ENABLE_GST)
G_MODULE_EXPORT gboolean
unlock_progress_cb(signal_user_data_t *ud)
{
ud->preview->progress_lock = FALSE;
// This function is initiated by g_idle_add. Must return false
// so that it is not called again
return FALSE;
}
#endif
void
ghb_live_preview_progress(signal_user_data_t *ud)
{
#if defined(_ENABLE_GST)
GstFormat fmt = GST_FORMAT_TIME;
gint64 len = -1, pos = -1;
if (!ud->preview->live_enabled)
return;
if (ud->preview->state != PREVIEW_STATE_LIVE || ud->preview->seek_lock)
return;
ud->preview->progress_lock = TRUE;
if (gst_element_query_duration(ud->preview->play, fmt, &len))
{
if (len != -1 && fmt == GST_FORMAT_TIME)
{
ud->preview->len = len / GST_MSECOND;
}
}
if (gst_element_query_position(ud->preview->play, fmt, &pos))
{
if (pos != -1 && fmt == GST_FORMAT_TIME)
{
ud->preview->pos = pos / GST_MSECOND;
}
}
if (ud->preview->len > 0)
{
GtkRange *progress;
gdouble percent;
percent = (gdouble)ud->preview->pos * 100 / ud->preview->len;
progress = GTK_RANGE(GHB_WIDGET(ud->builder, "live_preview_progress"));
gtk_range_set_value(progress, percent);
}
g_idle_add((GSourceFunc)unlock_progress_cb, ud);
#endif
}
#if defined(_ENABLE_GST)
G_MODULE_EXPORT gboolean
unlock_seek_cb(signal_user_data_t *ud)
{
ud->preview->seek_lock = FALSE;
// This function is initiated by g_idle_add. Must return false
// so that it is not called again
return FALSE;
}
#endif
G_MODULE_EXPORT void
live_preview_seek_cb(GtkWidget *widget, signal_user_data_t *ud)
{
#if defined(_ENABLE_GST)
gdouble dval;
gint64 pos;
if (!ud->preview->live_enabled)
return;
if (ud->preview->progress_lock)
return;
ud->preview->seek_lock = TRUE;
dval = gtk_range_get_value(GTK_RANGE(widget));
pos = ((ud->preview->len * dval) / 100) * GST_MSECOND;
gst_element_seek(ud->preview->play, 1.0,
GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_ACCURATE,
GST_SEEK_TYPE_SET, pos,
GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE);
g_idle_add((GSourceFunc)unlock_seek_cb, ud);
#endif
}
static void _draw_pixbuf(signal_user_data_t * ud, cairo_t *cr, GdkPixbuf *pix)
{
int pix_width, pix_height, hoff, voff;
cairo_save(cr);
cairo_rectangle(cr, 0, 0, ud->preview->render_width,
ud->preview->render_height);
cairo_set_operator(cr, CAIRO_OPERATOR_CLEAR);
cairo_fill(cr);
cairo_restore(cr);
pix_width = gdk_pixbuf_get_width(pix);
pix_height = gdk_pixbuf_get_height(pix);
hoff = MAX((ud->preview->render_width - pix_width) / 2, 0);
voff = MAX((ud->preview->render_height - pix_height) / 2, 0);
if (voff > 0 || hoff > 0)
{
cairo_translate(cr, hoff, voff);
}
gdk_cairo_set_source_pixbuf(cr, pix, 0, 0);
cairo_paint(cr);
}
static void set_mini_preview_image(signal_user_data_t *ud, GdkPixbuf * pix)
{
int preview_width, preview_height, width, height;
GdkPixbuf * scaled_preview;
if (pix == NULL)
{
return;
}
preview_width = gdk_pixbuf_get_width(pix);
preview_height = gdk_pixbuf_get_height(pix);
// Scale and display the mini-preview
height = MIN(ud->preview->button_height, 200);
width = preview_width * height / preview_height;
if (width > 400)
{
width = 400;
height = preview_height * width / preview_width;
}
if ((height >= 16) && (width >= 16))
{
scaled_preview = gdk_pixbuf_scale_simple(pix, width, height,
GDK_INTERP_NEAREST);
if (scaled_preview != NULL)
{
GtkWidget * widget;
widget = GHB_WIDGET (ud->builder, "preview_button_image");
gtk_image_set_from_pixbuf(GTK_IMAGE(widget), scaled_preview);
g_object_unref(scaled_preview);
}
}
}
GdkPixbuf * do_preview_scaling(signal_user_data_t *ud, GdkPixbuf *pix)
{
int preview_width, preview_height, width, height;
GdkPixbuf * scaled_preview;
if (pix == NULL)
{
return NULL;
}
preview_width = gdk_pixbuf_get_width(pix);
preview_height = gdk_pixbuf_get_height(pix);
if (ud->preview->render_width < 0 || ud->preview->render_height < 0)
{
// resize preview window to fit preview
preview_set_render_size(ud, preview_width, preview_height);
g_object_ref(pix);
return pix;
}
// Scale if necessary
if (preview_width != ud->preview->render_width ||
preview_height != ud->preview->render_height)
{
double xscale, yscale;
xscale = (double)ud->preview->render_width / preview_width;
yscale = (double)ud->preview->render_height / preview_height;
if (xscale <= yscale)
{
width = ud->preview->render_width;
height = preview_height * xscale;
}
else
{
width = preview_width * yscale;
height = ud->preview->render_height;
}
// Allow some slop in aspect ratio so that we fill the window
int delta = ud->preview->render_width - width;
if (delta > 0 && delta <= 16)
width = ud->preview->render_width;
delta = ud->preview->render_height - height;
if (delta > 0 && delta <= 16)
height = ud->preview->render_height;
scaled_preview = gdk_pixbuf_scale_simple(pix, width, height,
GDK_INTERP_BILINEAR);
return scaled_preview;
}
else
{
g_object_ref(pix);
}
return pix;
}
void
init_preview_image(signal_user_data_t *ud)
{
GtkWidget *widget;
gint width, height;
g_debug("set_preview_button_image ()");
gint title_id, titleindex;
const hb_title_t *title;
live_preview_stop(ud);
title_id = ghb_dict_get_int(ud->settings, "title");
title = ghb_lookup_title(title_id, &titleindex);
if (title == NULL) return;
widget = GHB_WIDGET (ud->builder, "preview_frame");
ud->preview->frame = ghb_widget_int(widget) - 1;
if (ud->preview->encoded[ud->preview->frame])
{
widget = GHB_WIDGET(ud->builder, "live_progress_box");
gtk_widget_hide (widget);
widget = GHB_WIDGET(ud->builder, "live_preview_progress");
gtk_widget_show (widget);
}
else
{
widget = GHB_WIDGET(ud->builder, "live_preview_progress");
gtk_widget_hide (widget);
widget = GHB_WIDGET(ud->builder, "live_progress_box");
gtk_widget_show (widget);
widget = GHB_WIDGET(ud->builder, "live_encode_progress");
gtk_progress_bar_set_text(GTK_PROGRESS_BAR(widget), "");
gtk_progress_bar_set_fraction (GTK_PROGRESS_BAR(widget), 0);
}
if (ud->preview->pix != NULL)
g_object_unref(ud->preview->pix);
if (ud->preview->scaled_pix != NULL)
g_object_unref(ud->preview->scaled_pix);
ud->preview->pix = ghb_get_preview_image(title, ud->preview->frame,
ud, &width, &height);
if (ud->preview->pix == NULL)
return;
int pix_width, pix_height;
pix_width = gdk_pixbuf_get_width(ud->preview->pix);
pix_height = gdk_pixbuf_get_height(ud->preview->pix);
preview_set_size(ud, pix_width, pix_height);
gchar *text = g_strdup_printf("%d x %d", width, height);
widget = GHB_WIDGET(ud->builder, "preview_dims");
gtk_label_set_text(GTK_LABEL(widget), text);
g_free(text);
}
void
ghb_set_preview_image(signal_user_data_t *ud)
{
init_preview_image(ud);
// Scale and display the mini-preview
set_mini_preview_image(ud, ud->preview->pix);
// Scale the full size preview
ud->preview->scaled_pix = do_preview_scaling(ud, ud->preview->pix);
// Display full size preview
GtkWidget *widget = GHB_WIDGET(ud->builder, "preview_image");
gtk_widget_queue_draw(widget);
}
void
ghb_rescale_preview_image(signal_user_data_t *ud)
{
init_preview_image(ud);
if (ud->preview->width <= 0 || ud->preview->height <= 0)