gstreamer/ext/resindvd/rsnparsetter.c

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/*
* Copyright (C) 2008 Jan Schmidt <thaytan@noraisin.net>
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <gst/gst.h>
#include <gst/video/video.h>
#include <string.h>
#include "rsnparsetter.h"
#include "rsnwrappedbuffer.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 ("video/x-raw-rgb; video/x-raw-yuv")
);
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw-rgb; video/x-raw-yuv")
);
static void rsn_parsetter_register_extra (GType rsn_parsetter_type);
GST_BOILERPLATE_FULL (RsnParSetter, rsn_parsetter, GstElement,
GST_TYPE_ELEMENT, rsn_parsetter_register_extra);
static void rsn_parsetter_finalize (GObject * object);
static GstFlowReturn rsn_parsetter_chain (GstPad * pad, GstBuffer * buf);
static gboolean rsn_parsetter_sink_event (GstPad * pad, GstEvent * event);
static gboolean rsn_parsetter_sink_setcaps (GstPad * pad, GstCaps * caps);
static GstFlowReturn rsn_parsetter_sink_bufferalloc (GstPad * pad,
guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
static GstCaps *rsn_parsetter_src_getcaps (GstPad * pad);
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_register_extra (GType rsn_parsetter_type)
{
GST_DEBUG_CATEGORY_INIT (rsn_parsetter_debug, "rsnparsetter", 0,
"Resin DVD aspect ratio adjuster");
}
static void
rsn_parsetter_base_init (gpointer gclass)
{
static GstElementDetails element_details = {
"Resin Aspect Ratio Setter",
"Filter/Video",
"Overrides caps on video buffers to force a particular display ratio",
"Jan Schmidt <thaytan@noraisin.net>"
};
GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
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_details (element_class, &element_details);
}
static void
rsn_parsetter_class_init (RsnParSetterClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->finalize = rsn_parsetter_finalize;
}
static void
rsn_parsetter_init (RsnParSetter * parset, RsnParSetterClass * gclass)
{
parset->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
gst_pad_set_getcaps_function (parset->sinkpad,
GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps));
gst_pad_set_chain_function (parset->sinkpad,
GST_DEBUG_FUNCPTR (rsn_parsetter_chain));
gst_pad_set_event_function (parset->sinkpad,
GST_DEBUG_FUNCPTR (rsn_parsetter_sink_event));
gst_pad_set_setcaps_function (parset->sinkpad,
GST_DEBUG_FUNCPTR (rsn_parsetter_sink_setcaps));
gst_pad_set_bufferalloc_function (parset->sinkpad,
GST_DEBUG_FUNCPTR (rsn_parsetter_sink_bufferalloc));
gst_element_add_pad (GST_ELEMENT (parset), parset->sinkpad);
parset->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
gst_pad_set_getcaps_function (parset->srcpad,
GST_DEBUG_FUNCPTR (rsn_parsetter_src_getcaps));
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, GstBuffer * buf)
{
RsnParSetter *parset = RSN_PARSETTER (GST_OBJECT_PARENT (pad));
/* If this is a buffer we wrapped up earlier, unwrap it now */
if (RSN_IS_WRAPPEDBUFFER (buf)) {
RsnWrappedBuffer *wrap_buf = RSN_WRAPPEDBUFFER (buf);
if (wrap_buf->owner == GST_ELEMENT (parset)) {
buf = rsn_wrappedbuffer_unwrap_and_unref (wrap_buf);
GST_DEBUG_OBJECT (parset, "Unwrapping %p yields buffer %p with caps %"
GST_PTR_FORMAT, wrap_buf, buf, GST_BUFFER_CAPS (buf));
}
}
if (parset->outcaps != GST_BUFFER_CAPS (buf)) {
if (parset->override_outcaps == FALSE &&
gst_caps_is_equal (parset->outcaps, GST_BUFFER_CAPS (buf))) {
/* Just update our output caps var */
gst_caps_replace (&parset->outcaps, GST_BUFFER_CAPS (buf));
goto out;
}
/* Replace the caps on the output buffer */
buf = gst_buffer_make_metadata_writable (buf);
gst_buffer_set_caps (buf, parset->outcaps);
GST_DEBUG_OBJECT (parset,
"Replacing caps on buffer %p with caps %" GST_PTR_FORMAT,
buf, parset->outcaps);
}
out:
return gst_pad_push (parset->srcpad, buf);
}
static gboolean
rsn_parsetter_sink_event (GstPad * pad, GstEvent * event)
{
RsnParSetter *parset = RSN_PARSETTER (gst_pad_get_parent (pad));
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);
}
}
out:
gst_object_unref (GST_OBJECT (parset));
return gst_pad_event_default (pad, event);
}
static GstCaps *
rsn_parsetter_src_getcaps (GstPad * pad)
{
RsnParSetter *parset = RSN_PARSETTER (gst_pad_get_parent (pad));
GstCaps *ret;
const GstCaps *templ_caps = gst_pad_get_pad_template_caps (pad);
ret = gst_pad_peer_get_caps (parset->sinkpad);
if (ret == NULL)
ret = gst_caps_copy (templ_caps);
else {
GstCaps *temp;
temp = gst_caps_intersect (templ_caps, ret);
gst_caps_unref (ret);
ret = rsn_parsetter_convert_caps (parset, temp, parset->is_widescreen);
gst_caps_unref (temp);
}
gst_object_unref (parset);
return ret;
}
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 (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 gboolean
rsn_parsetter_sink_setcaps (GstPad * pad, GstCaps * caps)
{
/* Check the new incoming caps against our current DAR, and mark
* whether the buffers will need adjusting */
RsnParSetter *parset = RSN_PARSETTER (gst_pad_get_parent (pad));
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);
gst_object_unref (parset);
return TRUE;
}
static GstFlowReturn
rsn_parsetter_sink_bufferalloc (GstPad * pad, guint64 offset, guint size,
GstCaps * caps, GstBuffer ** buf)
{
RsnParSetter *parset = RSN_PARSETTER (gst_pad_get_parent (pad));
GstFlowReturn ret;
GST_LOG_OBJECT (parset, "Entering bufferalloc");
if (rsn_parsetter_check_caps (parset, caps)) {
ret = gst_pad_alloc_buffer (parset->srcpad, offset, size, caps, buf);
GST_LOG_OBJECT (parset, "Not wrapping buf %p", *buf);
} else {
/* Allocate and wrap a downstream buffer */
GstBuffer *orig_buf;
GstBuffer *outbuf;
GstCaps *override_caps = rsn_parsetter_convert_caps (parset, caps,
parset->is_widescreen);
ret = gst_pad_alloc_buffer (parset->srcpad, offset, size,
override_caps, &orig_buf);
gst_caps_unref (override_caps);
if (ret != GST_FLOW_OK)
return ret;
outbuf = (GstBuffer *) rsn_wrapped_buffer_new (orig_buf);
if (!outbuf) {
/* FIXME: Throw error */
return GST_FLOW_ERROR;
}
rsn_wrapped_buffer_set_owner (RSN_WRAPPEDBUFFER (outbuf),
GST_ELEMENT (parset));
gst_buffer_set_caps (outbuf, caps);
GST_LOG_OBJECT (parset,
"Wrapped ds buf %p with caps %" GST_PTR_FORMAT
" into new buf %p with caps %" GST_PTR_FORMAT,
orig_buf, GST_BUFFER_CAPS (orig_buf), outbuf, GST_BUFFER_CAPS (outbuf));
*buf = outbuf;
}
gst_object_unref (GST_OBJECT (parset));
return ret;
}