mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-08 13:18:52 +00:00
Port the DVD element which overrides the MPEG encoded pixel-aspect-ratio to match that requested by the DVD VM.
332 lines
9.6 KiB
C
332 lines
9.6 KiB
C
/*
|
|
* Copyright (C) 2008 Jan Schmidt <thaytan@noraisin.net>
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#include <gst/gst.h>
|
|
#include <gst/glib-compat-private.h>
|
|
#include <gst/video/video.h>
|
|
#include <string.h>
|
|
|
|
#include "rsnparsetter.h"
|
|
|
|
GST_DEBUG_CATEGORY_STATIC (rsn_parsetter_debug);
|
|
#define GST_CAT_DEFAULT rsn_parsetter_debug
|
|
|
|
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
|
|
GST_PAD_SINK,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (GST_VIDEO_FORMATS_ALL))
|
|
);
|
|
|
|
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
|
|
GST_PAD_SRC,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (GST_VIDEO_FORMATS_ALL))
|
|
);
|
|
|
|
#define rsn_parsetter_parent_class parent_class
|
|
G_DEFINE_TYPE_WITH_CODE (RsnParSetter, rsn_parsetter, GST_TYPE_ELEMENT,
|
|
GST_DEBUG_CATEGORY_INIT (rsn_parsetter_debug, "rsnparsetter", 0,
|
|
"Resin DVD aspect ratio adjuster"));
|
|
|
|
static void rsn_parsetter_finalize (GObject * object);
|
|
static GstFlowReturn rsn_parsetter_chain (GstPad * pad,
|
|
RsnParSetter * parset, GstBuffer * buf);
|
|
static gboolean rsn_parsetter_sink_event (GstPad * pad,
|
|
RsnParSetter * parset, GstEvent * event);
|
|
|
|
static gboolean rsn_parsetter_src_query (GstPad * pad, RsnParSetter * parset,
|
|
GstQuery * query);
|
|
static GstCaps *rsn_parsetter_convert_caps (RsnParSetter * parset,
|
|
GstCaps * caps, gboolean widescreen);
|
|
static gboolean rsn_parsetter_check_caps (RsnParSetter * parset,
|
|
GstCaps * caps);
|
|
static void rsn_parsetter_update_caps (RsnParSetter * parset, GstCaps * caps);
|
|
|
|
static void
|
|
rsn_parsetter_class_init (RsnParSetterClass * klass)
|
|
{
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
|
|
|
|
gobject_class->finalize = rsn_parsetter_finalize;
|
|
|
|
gst_element_class_add_pad_template (element_class,
|
|
gst_static_pad_template_get (&src_factory));
|
|
gst_element_class_add_pad_template (element_class,
|
|
gst_static_pad_template_get (&sink_factory));
|
|
|
|
gst_element_class_set_metadata (element_class,
|
|
"Resin Aspect Ratio Setter", "Filter/Video",
|
|
"Overrides caps on video buffers to force a particular display ratio",
|
|
"Jan Schmidt <thaytan@noraisin.net>");
|
|
}
|
|
|
|
static void
|
|
rsn_parsetter_init (RsnParSetter * parset)
|
|
{
|
|
parset->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
|
|
gst_pad_set_chain_function (parset->sinkpad,
|
|
(GstPadChainFunction) GST_DEBUG_FUNCPTR (rsn_parsetter_chain));
|
|
gst_pad_set_event_function (parset->sinkpad,
|
|
(GstPadEventFunction) GST_DEBUG_FUNCPTR (rsn_parsetter_sink_event));
|
|
GST_PAD_SET_PROXY_CAPS (parset->sinkpad);
|
|
GST_PAD_SET_PROXY_ALLOCATION (parset->sinkpad);
|
|
gst_element_add_pad (GST_ELEMENT (parset), parset->sinkpad);
|
|
|
|
parset->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
|
|
gst_pad_set_query_function (parset->srcpad,
|
|
(GstPadQueryFunction) GST_DEBUG_FUNCPTR (rsn_parsetter_src_query));
|
|
GST_PAD_SET_PROXY_CAPS (parset->srcpad);
|
|
gst_element_add_pad (GST_ELEMENT (parset), parset->srcpad);
|
|
|
|
parset->caps_lock = g_mutex_new ();
|
|
}
|
|
|
|
static void
|
|
rsn_parsetter_finalize (GObject * object)
|
|
{
|
|
RsnParSetter *parset = RSN_PARSETTER (object);
|
|
|
|
gst_caps_replace (&parset->outcaps, NULL);
|
|
gst_caps_replace (&parset->in_caps_last, NULL);
|
|
gst_caps_replace (&parset->in_caps_converted, NULL);
|
|
|
|
g_mutex_free (parset->caps_lock);
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
static GstFlowReturn
|
|
rsn_parsetter_chain (GstPad * pad, RsnParSetter * parset, GstBuffer * buf)
|
|
{
|
|
return gst_pad_push (parset->srcpad, buf);
|
|
}
|
|
|
|
static gboolean
|
|
rsn_parsetter_sink_event (GstPad * pad, RsnParSetter * parset, GstEvent * event)
|
|
{
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_CUSTOM_DOWNSTREAM:{
|
|
const GstStructure *structure = gst_event_get_structure (event);
|
|
|
|
if (structure != NULL &&
|
|
gst_structure_has_name (structure, "application/x-gst-dvd")) {
|
|
const char *type = gst_structure_get_string (structure, "event");
|
|
if (type == NULL)
|
|
goto out;
|
|
|
|
if (strcmp (type, "dvd-video-format") == 0) {
|
|
gboolean is_widescreen;
|
|
|
|
gst_structure_get_boolean (structure, "video-widescreen",
|
|
&is_widescreen);
|
|
|
|
GST_DEBUG_OBJECT (parset, "Video is %s",
|
|
parset->is_widescreen ? "16:9" : "4:3");
|
|
|
|
g_mutex_lock (parset->caps_lock);
|
|
if (parset->is_widescreen != is_widescreen) {
|
|
/* Force caps check */
|
|
gst_caps_replace (&parset->in_caps_last, NULL);
|
|
gst_caps_replace (&parset->in_caps_converted, NULL);
|
|
}
|
|
parset->is_widescreen = is_widescreen;
|
|
|
|
/* FIXME: Added for testing: */
|
|
// parset->is_widescreen = FALSE;
|
|
|
|
g_mutex_unlock (parset->caps_lock);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case GST_EVENT_CAPS:
|
|
{
|
|
GstCaps *caps = NULL;
|
|
gst_event_parse_caps (event, &caps);
|
|
rsn_parsetter_update_caps (parset, caps);
|
|
if (parset->override_outcaps) {
|
|
gst_event_unref (event);
|
|
GST_DEBUG_OBJECT (parset,
|
|
"Handling caps event. Overriding upstream caps"
|
|
" with %" GST_PTR_FORMAT, parset->outcaps);
|
|
event = gst_event_new_caps (parset->outcaps);
|
|
} else {
|
|
GST_DEBUG_OBJECT (parset,
|
|
"Handling caps event. Upstream caps %" GST_PTR_FORMAT
|
|
" acceptable", caps);
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
out:
|
|
return gst_pad_event_default (pad, (GstObject *) (parset), event);
|
|
}
|
|
|
|
static gboolean
|
|
rsn_parsetter_src_query (GstPad * pad, RsnParSetter * parset, GstQuery * query)
|
|
{
|
|
GstCaps *caps = NULL;
|
|
|
|
if (!gst_pad_peer_query (parset->sinkpad, query))
|
|
return FALSE;
|
|
|
|
if (GST_QUERY_TYPE (query) != GST_QUERY_CAPS)
|
|
return TRUE;
|
|
|
|
gst_query_parse_caps_result (query, &caps);
|
|
|
|
GST_DEBUG_OBJECT (parset, "Handling caps query. Upstream caps %"
|
|
GST_PTR_FORMAT, caps);
|
|
|
|
if (caps == NULL) {
|
|
GstCaps *templ_caps = gst_pad_get_pad_template_caps (pad);
|
|
gst_query_set_caps_result (query, templ_caps);
|
|
gst_caps_unref (templ_caps);
|
|
} else {
|
|
caps = rsn_parsetter_convert_caps (parset, caps, parset->is_widescreen);
|
|
gst_query_set_caps_result (query, caps);
|
|
gst_caps_unref (caps);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Check if the DAR of the passed matches the required DAR */
|
|
static gboolean
|
|
rsn_parsetter_check_caps (RsnParSetter * parset, GstCaps * caps)
|
|
{
|
|
GstStructure *s;
|
|
gint width, height;
|
|
gint par_n, par_d;
|
|
guint dar_n, dar_d;
|
|
gboolean ret = FALSE;
|
|
|
|
g_mutex_lock (parset->caps_lock);
|
|
|
|
if (parset->in_caps_last &&
|
|
(caps == parset->in_caps_last ||
|
|
gst_caps_is_equal (caps, parset->in_caps_last))) {
|
|
ret = parset->in_caps_was_ok;
|
|
goto out;
|
|
}
|
|
|
|
/* Calculate the DAR from the incoming caps, and return TRUE if it matches
|
|
* the required DAR, FALSE if not */
|
|
s = gst_caps_get_structure (caps, 0);
|
|
if (s == NULL)
|
|
goto out;
|
|
|
|
if (!gst_structure_get_int (s, "width", &width) ||
|
|
!gst_structure_get_int (s, "height", &height))
|
|
goto out;
|
|
|
|
if (!gst_structure_get_fraction (s, "pixel-aspect-ratio", &par_n, &par_d))
|
|
par_n = par_d = 1;
|
|
|
|
if (!gst_video_calculate_display_ratio (&dar_n, &dar_d, width, height,
|
|
par_n, par_d, 1, 1))
|
|
goto out;
|
|
|
|
GST_DEBUG_OBJECT (parset,
|
|
"Incoming video caps now: w %d h %d PAR %d/%d = DAR %d/%d",
|
|
width, height, par_n, par_d, dar_n, dar_d);
|
|
|
|
if (parset->is_widescreen) {
|
|
if (dar_n == 16 && dar_d == 9)
|
|
ret = TRUE;
|
|
} else {
|
|
if (dar_n == 4 && dar_d == 3)
|
|
ret = TRUE;
|
|
}
|
|
|
|
gst_caps_replace (&parset->in_caps_last, caps);
|
|
gst_caps_replace (&parset->in_caps_converted, NULL);
|
|
parset->in_caps_was_ok = ret;
|
|
|
|
out:
|
|
g_mutex_unlock (parset->caps_lock);
|
|
return ret;
|
|
}
|
|
|
|
static GstCaps *
|
|
rsn_parsetter_convert_caps (RsnParSetter * parset, GstCaps * caps,
|
|
gboolean widescreen)
|
|
{
|
|
/* Duplicate the given caps, with a PAR that provides the desired DAR */
|
|
GstCaps *outcaps;
|
|
GstStructure *s;
|
|
gint width, height;
|
|
gint par_n, par_d;
|
|
guint dar_n, dar_d;
|
|
GValue par = { 0, };
|
|
|
|
g_mutex_lock (parset->caps_lock);
|
|
if (caps == parset->in_caps_last && parset->in_caps_converted) {
|
|
outcaps = gst_caps_ref (parset->in_caps_converted);
|
|
goto out;
|
|
}
|
|
|
|
outcaps = gst_caps_copy (caps);
|
|
|
|
/* Calculate the DAR from the incoming caps, and return TRUE if it matches
|
|
* the required DAR, FALSE if not */
|
|
s = gst_caps_get_structure (outcaps, 0);
|
|
if (s == NULL)
|
|
goto out;
|
|
|
|
if (!gst_structure_get_int (s, "width", &width) ||
|
|
!gst_structure_get_int (s, "height", &height))
|
|
goto out;
|
|
|
|
if (widescreen) {
|
|
dar_n = 16;
|
|
dar_d = 9;
|
|
} else {
|
|
dar_n = 4;
|
|
dar_d = 3;
|
|
}
|
|
|
|
par_n = dar_n * height;
|
|
par_d = dar_d * width;
|
|
|
|
g_value_init (&par, GST_TYPE_FRACTION);
|
|
gst_value_set_fraction (&par, par_n, par_d);
|
|
gst_structure_set_value (s, "pixel-aspect-ratio", &par);
|
|
g_value_unset (&par);
|
|
|
|
gst_caps_replace (&parset->in_caps_converted, outcaps);
|
|
out:
|
|
g_mutex_unlock (parset->caps_lock);
|
|
return outcaps;
|
|
}
|
|
|
|
static void
|
|
rsn_parsetter_update_caps (RsnParSetter * parset, GstCaps * caps)
|
|
{
|
|
/* Check the new incoming caps against our current DAR, and mark
|
|
* whether the caps need adjusting */
|
|
if (rsn_parsetter_check_caps (parset, caps)) {
|
|
parset->override_outcaps = FALSE;
|
|
gst_caps_replace (&parset->outcaps, caps);
|
|
} else {
|
|
GstCaps *override_caps = rsn_parsetter_convert_caps (parset, caps,
|
|
parset->is_widescreen);
|
|
if (parset->outcaps)
|
|
gst_caps_unref (parset->outcaps);
|
|
parset->outcaps = override_caps;
|
|
|
|
parset->override_outcaps = TRUE;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (parset, "caps changed: need_override now = %d",
|
|
parset->override_outcaps);
|
|
}
|