gstreamer/ext/aalib/gstaasink.c
2012-04-10 00:51:41 +01:00

596 lines
16 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-aasink
* @see_also: #GstCACASink
*
* Displays video as b/w ascii art.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch filesrc location=test.avi ! decodebin ! ffmpegcolorspace ! aasink
* ]| This pipeline renders a video to ascii art into a separate window.
* |[
* gst-launch filesrc location=test.avi ! decodebin ! ffmpegcolorspace ! aasink driver=curses
* ]| This pipeline renders a video to ascii art into the current terminal.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <sys/time.h>
#include <gst/video/gstvideometa.h>
#include "gstaasink.h"
/* aasink signals and args */
enum
{
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_WIDTH,
PROP_HEIGHT,
PROP_DRIVER,
PROP_DITHER,
PROP_BRIGHTNESS,
PROP_CONTRAST,
PROP_GAMMA,
PROP_INVERSION,
PROP_RANDOMVAL,
PROP_FRAMES_DISPLAYED,
PROP_FRAME_TIME
};
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("I420"))
);
static GstCaps *gst_aasink_fixate (GstBaseSink * bsink, GstCaps * caps);
static gboolean gst_aasink_setcaps (GstBaseSink * bsink, GstCaps * caps);
static void gst_aasink_get_times (GstBaseSink * bsink, GstBuffer * buffer,
GstClockTime * start, GstClockTime * end);
static gboolean gst_aasink_propose_allocation (GstBaseSink * bsink,
GstQuery * query);
static GstFlowReturn gst_aasink_show_frame (GstVideoSink * videosink,
GstBuffer * buffer);
static void gst_aasink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_aasink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstStateChangeReturn gst_aasink_change_state (GstElement * element,
GstStateChange transition);
#define gst_aasink_parent_class parent_class
G_DEFINE_TYPE (GstAASink, gst_aasink, GST_TYPE_VIDEO_SINK);
#define GST_TYPE_AADRIVERS (gst_aasink_drivers_get_type())
static GType
gst_aasink_drivers_get_type (void)
{
static GType driver_type = 0;
if (!driver_type) {
GEnumValue *drivers;
const struct aa_driver *driver;
gint n_drivers;
gint i;
for (n_drivers = 0; aa_drivers[n_drivers]; n_drivers++) {
/* count number of drivers */
}
drivers = g_new0 (GEnumValue, n_drivers + 1);
for (i = 0; i < n_drivers; i++) {
driver = aa_drivers[i];
drivers[i].value = i;
drivers[i].value_name = g_strdup (driver->name);
drivers[i].value_nick = g_utf8_strdown (driver->shortname, -1);
}
drivers[i].value = 0;
drivers[i].value_name = NULL;
drivers[i].value_nick = NULL;
driver_type = g_enum_register_static ("GstAASinkDrivers", drivers);
}
return driver_type;
}
#define GST_TYPE_AADITHER (gst_aasink_dither_get_type())
static GType
gst_aasink_dither_get_type (void)
{
static GType dither_type = 0;
if (!dither_type) {
GEnumValue *ditherers;
gint n_ditherers;
gint i;
for (n_ditherers = 0; aa_dithernames[n_ditherers]; n_ditherers++) {
/* count number of ditherers */
}
ditherers = g_new0 (GEnumValue, n_ditherers + 1);
for (i = 0; i < n_ditherers; i++) {
ditherers[i].value = i;
ditherers[i].value_name = g_strdup (aa_dithernames[i]);
ditherers[i].value_nick =
g_strdelimit (g_strdup (aa_dithernames[i]), " _", '-');
}
ditherers[i].value = 0;
ditherers[i].value_name = NULL;
ditherers[i].value_nick = NULL;
dither_type = g_enum_register_static ("GstAASinkDitherers", ditherers);
}
return dither_type;
}
static void
gst_aasink_class_init (GstAASinkClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseSinkClass *gstbasesink_class;
GstVideoSinkClass *gstvideosink_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbasesink_class = (GstBaseSinkClass *) klass;
gstvideosink_class = (GstVideoSinkClass *) klass;
gobject_class->set_property = gst_aasink_set_property;
gobject_class->get_property = gst_aasink_get_property;
/* FIXME: add long property descriptions */
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_WIDTH,
g_param_spec_int ("width", "width", "width", G_MININT, G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_HEIGHT,
g_param_spec_int ("height", "height", "height", G_MININT, G_MAXINT, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DRIVER,
g_param_spec_enum ("driver", "driver", "driver", GST_TYPE_AADRIVERS, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DITHER,
g_param_spec_enum ("dither", "dither", "dither", GST_TYPE_AADITHER, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BRIGHTNESS,
g_param_spec_int ("brightness", "brightness", "brightness", G_MININT,
G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_CONTRAST,
g_param_spec_int ("contrast", "contrast", "contrast", G_MININT, G_MAXINT,
0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_GAMMA,
g_param_spec_float ("gamma", "gamma", "gamma", 0.0, 5.0, 1.0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_INVERSION,
g_param_spec_boolean ("inversion", "inversion", "inversion", TRUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_RANDOMVAL,
g_param_spec_int ("randomval", "randomval", "randomval", G_MININT,
G_MAXINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_FRAMES_DISPLAYED, g_param_spec_int ("frames-displayed",
"frames displayed", "frames displayed", G_MININT, G_MAXINT, 0,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FRAME_TIME,
g_param_spec_int ("frame-time", "frame time", "frame time", G_MININT,
G_MAXINT, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_set_static_metadata (gstelement_class,
"ASCII art video sink", "Sink/Video", "An ASCII art videosink",
"Wim Taymans <wim.taymans@chello.be>");
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_aasink_change_state);
gstbasesink_class->fixate = GST_DEBUG_FUNCPTR (gst_aasink_fixate);
gstbasesink_class->set_caps = GST_DEBUG_FUNCPTR (gst_aasink_setcaps);
gstbasesink_class->get_times = GST_DEBUG_FUNCPTR (gst_aasink_get_times);
gstbasesink_class->propose_allocation =
GST_DEBUG_FUNCPTR (gst_aasink_propose_allocation);
gstvideosink_class->show_frame = GST_DEBUG_FUNCPTR (gst_aasink_show_frame);
}
static GstCaps *
gst_aasink_fixate (GstBaseSink * bsink, GstCaps * caps)
{
GstStructure *structure;
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_SINK_CLASS (parent_class)->fixate (bsink, caps);
return caps;
}
static gboolean
gst_aasink_setcaps (GstBaseSink * basesink, GstCaps * caps)
{
GstAASink *aasink;
GstVideoInfo info;
aasink = GST_AASINK (basesink);
if (!gst_video_info_from_caps (&info, caps))
goto invalid_caps;
aasink->info = info;
return TRUE;
/* ERRORS */
invalid_caps:
{
GST_DEBUG_OBJECT (aasink, "invalid caps");
return FALSE;
}
}
static void
gst_aasink_init (GstAASink * aasink)
{
memcpy (&aasink->ascii_surf, &aa_defparams,
sizeof (struct aa_hardware_params));
aasink->ascii_parms.bright = 0;
aasink->ascii_parms.contrast = 16;
aasink->ascii_parms.gamma = 1.0;
aasink->ascii_parms.dither = 0;
aasink->ascii_parms.inversion = 0;
aasink->ascii_parms.randomval = 0;
aasink->aa_driver = 0;
}
static void
gst_aasink_scale (GstAASink * aasink, guchar * src, guchar * dest,
gint sw, gint sh, gint ss, gint dw, gint dh)
{
gint ypos, yinc, y;
gint xpos, xinc, x;
g_return_if_fail ((dw != 0) && (dh != 0));
ypos = 0x10000;
yinc = (sh << 16) / dh;
xinc = (sw << 16) / dw;
for (y = dh; y; y--) {
while (ypos > 0x10000) {
ypos -= 0x10000;
src += ss;
}
xpos = 0x10000;
{
guchar *destp = dest;
guchar *srcp = src;
for (x = dw; x; x--) {
while (xpos >= 0x10000L) {
srcp++;
xpos -= 0x10000L;
}
*destp++ = *srcp;
xpos += xinc;
}
}
dest += dw;
ypos += yinc;
}
}
static void
gst_aasink_get_times (GstBaseSink * sink, GstBuffer * buffer,
GstClockTime * start, GstClockTime * end)
{
*start = GST_BUFFER_TIMESTAMP (buffer);
if (GST_BUFFER_DURATION_IS_VALID (buffer))
*end = *start + GST_BUFFER_DURATION (buffer);
}
static gboolean
gst_aasink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
{
GstCaps *caps;
GstVideoInfo info;
guint size;
gst_query_parse_allocation (query, &caps, NULL);
if (caps == NULL)
goto no_caps;
if (!gst_video_info_from_caps (&info, caps))
goto invalid_caps;
size = GST_VIDEO_INFO_SIZE (&info);
/* we need at least 2 buffer because we hold on to the last one */
gst_query_add_allocation_pool (query, NULL, size, 2, 0);
/* we support various metadata */
gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE);
return TRUE;
/* ERRORS */
no_caps:
{
GST_DEBUG_OBJECT (bsink, "no caps specified");
return FALSE;
}
invalid_caps:
{
GST_DEBUG_OBJECT (bsink, "invalid caps specified");
return FALSE;
}
}
static GstFlowReturn
gst_aasink_show_frame (GstVideoSink * videosink, GstBuffer * buffer)
{
GstAASink *aasink;
GstVideoFrame frame;
aasink = GST_AASINK (videosink);
GST_DEBUG ("show frame");
if (!gst_video_frame_map (&frame, &aasink->info, buffer, GST_MAP_READ))
goto invalid_frame;
gst_aasink_scale (aasink, GST_VIDEO_FRAME_PLANE_DATA (&frame, 0), /* src */
aa_image (aasink->context), /* dest */
GST_VIDEO_INFO_WIDTH (&aasink->info), /* sw */
GST_VIDEO_INFO_HEIGHT (&aasink->info), /* sh */
GST_VIDEO_FRAME_PLANE_STRIDE (&frame, 0), /* ss */
aa_imgwidth (aasink->context), /* dw */
aa_imgheight (aasink->context)); /* dh */
aa_render (aasink->context, &aasink->ascii_parms,
0, 0, aa_imgwidth (aasink->context), aa_imgheight (aasink->context));
aa_flush (aasink->context);
aa_getevent (aasink->context, FALSE);
gst_video_frame_unmap (&frame);
return GST_FLOW_OK;
/* ERRORS */
invalid_frame:
{
GST_DEBUG_OBJECT (aasink, "invalid frame");
return GST_FLOW_ERROR;
}
}
static void
gst_aasink_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstAASink *aasink;
aasink = GST_AASINK (object);
switch (prop_id) {
case PROP_WIDTH:
aasink->ascii_surf.width = g_value_get_int (value);
break;
case PROP_HEIGHT:
aasink->ascii_surf.height = g_value_get_int (value);
break;
case PROP_DRIVER:{
aasink->aa_driver = g_value_get_enum (value);
break;
}
case PROP_DITHER:{
aasink->ascii_parms.dither = g_value_get_enum (value);
break;
}
case PROP_BRIGHTNESS:{
aasink->ascii_parms.bright = g_value_get_int (value);
break;
}
case PROP_CONTRAST:{
aasink->ascii_parms.contrast = g_value_get_int (value);
break;
}
case PROP_GAMMA:{
aasink->ascii_parms.gamma = g_value_get_float (value);
break;
}
case PROP_INVERSION:{
aasink->ascii_parms.inversion = g_value_get_boolean (value);
break;
}
case PROP_RANDOMVAL:{
aasink->ascii_parms.randomval = g_value_get_int (value);
break;
}
default:
break;
}
}
static void
gst_aasink_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstAASink *aasink;
aasink = GST_AASINK (object);
switch (prop_id) {
case PROP_WIDTH:{
g_value_set_int (value, aasink->ascii_surf.width);
break;
}
case PROP_HEIGHT:{
g_value_set_int (value, aasink->ascii_surf.height);
break;
}
case PROP_DRIVER:{
g_value_set_enum (value, aasink->aa_driver);
break;
}
case PROP_DITHER:{
g_value_set_enum (value, aasink->ascii_parms.dither);
break;
}
case PROP_BRIGHTNESS:{
g_value_set_int (value, aasink->ascii_parms.bright);
break;
}
case PROP_CONTRAST:{
g_value_set_int (value, aasink->ascii_parms.contrast);
break;
}
case PROP_GAMMA:{
g_value_set_float (value, aasink->ascii_parms.gamma);
break;
}
case PROP_INVERSION:{
g_value_set_boolean (value, aasink->ascii_parms.inversion);
break;
}
case PROP_RANDOMVAL:{
g_value_set_int (value, aasink->ascii_parms.randomval);
break;
}
case PROP_FRAMES_DISPLAYED:{
g_value_set_int (value, aasink->frames_displayed);
break;
}
case PROP_FRAME_TIME:{
g_value_set_int (value, aasink->frame_time / 1000000);
break;
}
default:{
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
}
static gboolean
gst_aasink_open (GstAASink * aasink)
{
if (!aasink->context) {
aa_recommendhidisplay (aa_drivers[aasink->aa_driver]->shortname);
aasink->context = aa_autoinit (&aasink->ascii_surf);
if (aasink->context == NULL) {
GST_ELEMENT_ERROR (GST_ELEMENT (aasink), LIBRARY, TOO_LAZY, (NULL),
("error opening aalib context"));
return FALSE;
}
aa_autoinitkbd (aasink->context, 0);
aa_resizehandler (aasink->context, (void *) aa_resize);
}
return TRUE;
}
static gboolean
gst_aasink_close (GstAASink * aasink)
{
aa_close (aasink->context);
aasink->context = NULL;
return TRUE;
}
static GstStateChangeReturn
gst_aasink_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
if (!gst_aasink_open (GST_AASINK (element)))
goto open_failed;
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:
break;
case GST_STATE_CHANGE_READY_TO_NULL:
gst_aasink_close (GST_AASINK (element));
break;
default:
break;
}
return ret;
open_failed:
{
return GST_STATE_CHANGE_FAILURE;
}
}
static gboolean
plugin_init (GstPlugin * plugin)
{
if (!gst_element_register (plugin, "aasink", GST_RANK_NONE, GST_TYPE_AASINK))
return FALSE;
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
aasink,
"ASCII Art video sink",
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);