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gstreamer/subprojects/gst-plugins-bad/gst/dvdspu/gstdvdspu.c

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/* GStreamer DVD Sub-Picture Unit
* Copyright (C) 2007 Fluendo S.A. <info@fluendo.com>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-dvdspu
* @title: dvdspu
*
* DVD sub picture overlay element.
*
* ## Example launch line
* |[
* FIXME: gst-launch-1.0 ...
* ]| FIXME: description for the sample launch pipeline
*
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <glib/gi18n-lib.h>
#include <gst/video/video.h>
#include <gst/video/video-overlay-composition.h>
#include <gst/video/gstvideometa.h>
#include <gst/video/gstvideosink.h>
#include <string.h>
#include <gst/gst.h>
#include "gstdvdspu.h"
GST_DEBUG_CATEGORY (dvdspu_debug);
#define GST_CAT_DEFAULT dvdspu_debug
GstDVDSPUDebugFlags dvdspu_debug_flags;
/* Filter signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
#define VIDEO_FORMATS GST_VIDEO_OVERLAY_COMPOSITION_BLEND_FORMATS
#define DVDSPU_CAPS GST_VIDEO_CAPS_MAKE (VIDEO_FORMATS)
#define DVDSPU_ALL_CAPS DVDSPU_CAPS ";" \
GST_VIDEO_CAPS_MAKE_WITH_FEATURES ("ANY", GST_VIDEO_FORMATS_ANY)
static GstStaticCaps sw_template_caps = GST_STATIC_CAPS (DVDSPU_CAPS);
static GstStaticPadTemplate video_sink_factory =
GST_STATIC_PAD_TEMPLATE ("video",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (DVDSPU_ALL_CAPS)
);
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (DVDSPU_ALL_CAPS)
);
static GstStaticPadTemplate subpic_sink_factory =
GST_STATIC_PAD_TEMPLATE ("subpicture",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("subpicture/x-dvd; subpicture/x-pgs")
);
static gboolean dvd_spu_element_init (GstPlugin * plugin);
#define gst_dvd_spu_parent_class parent_class
G_DEFINE_TYPE (GstDVDSpu, gst_dvd_spu, GST_TYPE_ELEMENT);
GST_ELEMENT_REGISTER_DEFINE_CUSTOM (dvdspu, dvd_spu_element_init);
static void gst_dvd_spu_dispose (GObject * object);
static void gst_dvd_spu_finalize (GObject * object);
static GstStateChangeReturn gst_dvd_spu_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_dvd_spu_src_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_dvd_spu_src_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static GstCaps *gst_dvd_spu_src_get_caps (GstDVDSpu * dvdspu, GstPad * pad,
GstCaps * filter);
static GstCaps *gst_dvd_spu_video_get_caps (GstDVDSpu * dvdspu, GstPad * pad,
GstCaps * filter);
static gboolean gst_dvd_spu_video_set_caps (GstDVDSpu * dvdspu, GstPad * pad,
GstCaps * caps);
static GstFlowReturn gst_dvd_spu_video_chain (GstPad * pad, GstObject * parent,
GstBuffer * buf);
static gboolean gst_dvd_spu_video_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_dvd_spu_video_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static void gst_dvd_spu_redraw_still (GstDVDSpu * dvdspu, gboolean force);
static void gst_dvd_spu_check_still_updates (GstDVDSpu * dvdspu);
static GstFlowReturn gst_dvd_spu_subpic_chain (GstPad * pad, GstObject * parent,
GstBuffer * buf);
static gboolean gst_dvd_spu_subpic_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_dvd_spu_subpic_set_caps (GstDVDSpu * dvdspu, GstPad * pad,
GstCaps * caps);
static gboolean gst_dvd_spu_negotiate (GstDVDSpu * dvdspu, GstCaps * caps);
static void gst_dvd_spu_clear (GstDVDSpu * dvdspu);
static void gst_dvd_spu_flush_spu_info (GstDVDSpu * dvdspu,
gboolean process_events);
static void gst_dvd_spu_advance_spu (GstDVDSpu * dvdspu, GstClockTime new_ts);
static void gstspu_render (GstDVDSpu * dvdspu, GstBuffer * buf);
static GstFlowReturn
dvdspu_handle_vid_buffer (GstDVDSpu * dvdspu, GstBuffer * buf);
static void gst_dvd_spu_handle_dvd_event (GstDVDSpu * dvdspu, GstEvent * event);
static void
gst_dvd_spu_class_init (GstDVDSpuClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->dispose = (GObjectFinalizeFunc) gst_dvd_spu_dispose;
gobject_class->finalize = (GObjectFinalizeFunc) gst_dvd_spu_finalize;
gstelement_class->change_state = gst_dvd_spu_change_state;
gst_element_class_add_static_pad_template (gstelement_class, &src_factory);
gst_element_class_add_static_pad_template (gstelement_class,
&video_sink_factory);
gst_element_class_add_static_pad_template (gstelement_class,
&subpic_sink_factory);
gst_element_class_set_static_metadata (gstelement_class,
"Sub-picture Overlay", "Mixer/Video/Overlay/SubPicture/DVD/Bluray",
"Parses Sub-Picture command streams and renders the SPU overlay "
"onto the video as it passes through",
"Jan Schmidt <thaytan@noraisin.net>");
}
static void
gst_dvd_spu_init (GstDVDSpu * dvdspu)
{
dvdspu->videosinkpad =
gst_pad_new_from_static_template (&video_sink_factory, "video");
gst_pad_set_chain_function (dvdspu->videosinkpad, gst_dvd_spu_video_chain);
gst_pad_set_event_function (dvdspu->videosinkpad, gst_dvd_spu_video_event);
gst_pad_set_query_function (dvdspu->videosinkpad, gst_dvd_spu_video_query);
dvdspu->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
gst_pad_set_event_function (dvdspu->srcpad, gst_dvd_spu_src_event);
gst_pad_set_query_function (dvdspu->srcpad, gst_dvd_spu_src_query);
dvdspu->subpic_sinkpad =
gst_pad_new_from_static_template (&subpic_sink_factory, "subpicture");
gst_pad_set_chain_function (dvdspu->subpic_sinkpad, gst_dvd_spu_subpic_chain);
gst_pad_set_event_function (dvdspu->subpic_sinkpad, gst_dvd_spu_subpic_event);
GST_PAD_SET_PROXY_ALLOCATION (dvdspu->videosinkpad);
gst_element_add_pad (GST_ELEMENT (dvdspu), dvdspu->videosinkpad);
gst_element_add_pad (GST_ELEMENT (dvdspu), dvdspu->subpic_sinkpad);
gst_element_add_pad (GST_ELEMENT (dvdspu), dvdspu->srcpad);
g_mutex_init (&dvdspu->spu_lock);
dvdspu->pending_spus = g_queue_new ();
gst_dvd_spu_clear (dvdspu);
}
static void
gst_dvd_spu_reset_composition (GstDVDSpu * dvdspu)
{
if (dvdspu->composition) {
gst_video_overlay_composition_unref (dvdspu->composition);
dvdspu->composition = NULL;
}
}
static void
gst_dvd_spu_clear (GstDVDSpu * dvdspu)
{
gst_dvd_spu_flush_spu_info (dvdspu, FALSE);
gst_segment_init (&dvdspu->subp_seg, GST_FORMAT_UNDEFINED);
dvdspu->spu_input_type = SPU_INPUT_TYPE_NONE;
gst_buffer_replace (&dvdspu->ref_frame, NULL);
gst_buffer_replace (&dvdspu->pending_frame, NULL);
dvdspu->spu_state.info.fps_n = 25;
dvdspu->spu_state.info.fps_d = 1;
gst_segment_init (&dvdspu->video_seg, GST_FORMAT_UNDEFINED);
}
static void
gst_dvd_spu_dispose (GObject * object)
{
GstDVDSpu *dvdspu = GST_DVD_SPU (object);
/* need to hold the SPU lock in case other stuff is still running... */
DVD_SPU_LOCK (dvdspu);
gst_dvd_spu_clear (dvdspu);
DVD_SPU_UNLOCK (dvdspu);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_dvd_spu_finalize (GObject * object)
{
GstDVDSpu *dvdspu = GST_DVD_SPU (object);
g_queue_free (dvdspu->pending_spus);
g_mutex_clear (&dvdspu->spu_lock);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
/* With SPU lock held, clear the queue of SPU packets */
static void
gst_dvd_spu_flush_spu_info (GstDVDSpu * dvdspu, gboolean keep_events)
{
SpuPacket *packet;
SpuState *state = &dvdspu->spu_state;
GQueue tmp_q = G_QUEUE_INIT;
GST_INFO_OBJECT (dvdspu, "Flushing SPU information");
if (dvdspu->partial_spu) {
gst_buffer_unref (dvdspu->partial_spu);
dvdspu->partial_spu = NULL;
}
packet = (SpuPacket *) g_queue_pop_head (dvdspu->pending_spus);
while (packet != NULL) {
if (packet->buf) {
gst_buffer_unref (packet->buf);
g_assert (packet->event == NULL);
g_free (packet);
} else if (packet->event) {
if (keep_events) {
g_queue_push_tail (&tmp_q, packet);
} else {
gst_event_unref (packet->event);
g_free (packet);
}
}
packet = (SpuPacket *) g_queue_pop_head (dvdspu->pending_spus);
}
/* Push anything we decided to keep back onto the pending_spus list */
for (packet = g_queue_pop_head (&tmp_q); packet != NULL;
packet = g_queue_pop_head (&tmp_q))
g_queue_push_tail (dvdspu->pending_spus, packet);
state->flags &= ~(SPU_STATE_FLAGS_MASK);
state->next_ts = GST_CLOCK_TIME_NONE;
switch (dvdspu->spu_input_type) {
case SPU_INPUT_TYPE_VOBSUB:
gstspu_vobsub_flush (dvdspu);
break;
case SPU_INPUT_TYPE_PGS:
gstspu_pgs_flush (dvdspu);
break;
default:
break;
}
gst_dvd_spu_reset_composition (dvdspu);
}
static gboolean
gst_dvd_spu_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstDVDSpu *dvdspu = GST_DVD_SPU (parent);
GstPad *peer;
gboolean res = TRUE;
peer = gst_pad_get_peer (dvdspu->videosinkpad);
if (peer) {
res = gst_pad_send_event (peer, event);
gst_object_unref (peer);
} else
gst_event_unref (event);
return res;
}
static gboolean
gst_dvd_spu_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstDVDSpu *dvdspu = GST_DVD_SPU (parent);
gboolean res = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CAPS:
{
GstCaps *filter, *caps;
gst_query_parse_caps (query, &filter);
caps = gst_dvd_spu_src_get_caps (dvdspu, pad, filter);
gst_query_set_caps_result (query, caps);
gst_caps_unref (caps);
res = TRUE;
break;
}
default:
res = gst_pad_query_default (pad, parent, query);
break;
}
return res;
}
static gboolean
gst_dvd_spu_can_handle_caps (GstCaps * caps)
{
GstCaps *sw_caps;
gboolean ret;
sw_caps = gst_static_caps_get (&sw_template_caps);
ret = gst_caps_is_subset (caps, sw_caps);
gst_caps_unref (sw_caps);
return ret;
}
static gboolean
gst_dvd_spu_video_set_caps (GstDVDSpu * dvdspu, GstPad * pad, GstCaps * caps)
{
GstVideoInfo info;
gboolean ret = FALSE;
if (!gst_video_info_from_caps (&info, caps))
goto invalid_caps;
dvdspu->spu_state.info = info;
ret = gst_dvd_spu_negotiate (dvdspu, caps);
DVD_SPU_LOCK (dvdspu);
if (!dvdspu->attach_compo_to_buffer && !gst_dvd_spu_can_handle_caps (caps)) {
GST_DEBUG_OBJECT (dvdspu, "unsupported caps %" GST_PTR_FORMAT, caps);
ret = FALSE;
}
DVD_SPU_UNLOCK (dvdspu);
return ret;
/* ERRORS */
invalid_caps:
{
GST_DEBUG_OBJECT (dvdspu, "could not parse caps");
return FALSE;
}
}
/**
* gst_dvd_spu_add_feature_and_intersect:
*
* Creates a new #GstCaps containing the (given caps +
* given caps feature) + (given caps intersected by the
* given filter).
*
* Returns: the new #GstCaps
*/
static GstCaps *
gst_dvd_spu_add_feature_and_intersect (GstCaps * caps,
const gchar * feature, GstCaps * filter)
{
int i, caps_size;
GstCaps *new_caps;
new_caps = gst_caps_copy (caps);
caps_size = gst_caps_get_size (new_caps);
for (i = 0; i < caps_size; i++) {
GstCapsFeatures *features = gst_caps_get_features (new_caps, i);
if (!gst_caps_features_is_any (features)) {
gst_caps_features_add (features, feature);
}
}
gst_caps_append (new_caps, gst_caps_intersect_full (caps,
filter, GST_CAPS_INTERSECT_FIRST));
return new_caps;
}
/**
* gst_dvd_spu_intersect_by_feature:
*
* Creates a new #GstCaps based on the following filtering rule.
*
* For each individual caps contained in given caps, if the
* caps uses the given caps feature, keep a version of the caps
* with the feature and an another one without. Otherwise, intersect
* the caps with the given filter.
*
* Returns: the new #GstCaps
*/
static GstCaps *
gst_dvd_spu_intersect_by_feature (GstCaps * caps,
const gchar * feature, GstCaps * filter)
{
int i, caps_size;
GstCaps *new_caps;
new_caps = gst_caps_new_empty ();
caps_size = gst_caps_get_size (caps);
for (i = 0; i < caps_size; i++) {
GstStructure *caps_structure = gst_caps_get_structure (caps, i);
GstCapsFeatures *caps_features =
gst_caps_features_copy (gst_caps_get_features (caps, i));
GstCaps *filtered_caps;
GstCaps *simple_caps =
gst_caps_new_full (gst_structure_copy (caps_structure), NULL);
gst_caps_set_features (simple_caps, 0, caps_features);
if (gst_caps_features_contains (caps_features, feature)) {
gst_caps_append (new_caps, gst_caps_copy (simple_caps));
gst_caps_features_remove (caps_features, feature);
filtered_caps = gst_caps_ref (simple_caps);
} else {
filtered_caps = gst_caps_intersect_full (simple_caps, filter,
GST_CAPS_INTERSECT_FIRST);
}
gst_caps_unref (simple_caps);
gst_caps_append (new_caps, filtered_caps);
}
return new_caps;
}
static GstCaps *
gst_dvd_spu_video_get_caps (GstDVDSpu * dvdspu, GstPad * pad, GstCaps * filter)
{
GstPad *srcpad = dvdspu->srcpad;
GstCaps *peer_caps = NULL, *caps = NULL, *dvdspu_filter = NULL;
if (filter) {
/* filter caps + composition feature + filter caps
* filtered by the software caps. */
GstCaps *sw_caps = gst_static_caps_get (&sw_template_caps);
dvdspu_filter = gst_dvd_spu_add_feature_and_intersect (filter,
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION, sw_caps);
gst_caps_unref (sw_caps);
GST_DEBUG_OBJECT (dvdspu, "dvdspu filter %" GST_PTR_FORMAT, dvdspu_filter);
}
peer_caps = gst_pad_peer_query_caps (srcpad, dvdspu_filter);
if (dvdspu_filter)
gst_caps_unref (dvdspu_filter);
if (peer_caps) {
GST_DEBUG_OBJECT (pad, "peer caps %" GST_PTR_FORMAT, peer_caps);
if (gst_caps_is_any (peer_caps)) {
/* if peer returns ANY caps, return filtered src pad template caps */
caps = gst_caps_copy (gst_pad_get_pad_template_caps (srcpad));
} else {
/* duplicate caps which contains the composition into one version with
* the meta and one without. Filter the other caps by the software caps */
GstCaps *sw_caps = gst_static_caps_get (&sw_template_caps);
caps = gst_dvd_spu_intersect_by_feature (peer_caps,
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION, sw_caps);
gst_caps_unref (sw_caps);
}
gst_caps_unref (peer_caps);
} else {
/* no peer, our padtemplate is enough then */
caps = gst_pad_get_pad_template_caps (pad);
}
if (filter) {
GstCaps *intersection = gst_caps_intersect_full (filter, caps,
GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (caps);
caps = intersection;
}
GST_DEBUG_OBJECT (dvdspu, "returning %" GST_PTR_FORMAT, caps);
return caps;
}
static GstCaps *
gst_dvd_spu_src_get_caps (GstDVDSpu * dvdspu, GstPad * pad, GstCaps * filter)
{
GstPad *sinkpad = dvdspu->videosinkpad;
GstCaps *peer_caps = NULL, *caps = NULL, *dvdspu_filter = NULL;
if (filter) {
/* duplicate filter caps which contains the composition into one version
* with the meta and one without. Filter the other caps by the software
* caps */
GstCaps *sw_caps = gst_static_caps_get (&sw_template_caps);
dvdspu_filter = gst_dvd_spu_intersect_by_feature (filter,
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION, sw_caps);
gst_caps_unref (sw_caps);
}
peer_caps = gst_pad_peer_query_caps (sinkpad, dvdspu_filter);
if (dvdspu_filter)
gst_caps_unref (dvdspu_filter);
if (peer_caps) {
GST_DEBUG_OBJECT (pad, "peer caps %" GST_PTR_FORMAT, peer_caps);
if (gst_caps_is_any (peer_caps)) {
/* if peer returns ANY caps, return filtered sink pad template caps */
caps = gst_caps_copy (gst_pad_get_pad_template_caps (sinkpad));
} else {
/* return upstream caps + composition feature + upstream caps
* filtered by the software caps. */
GstCaps *sw_caps = gst_static_caps_get (&sw_template_caps);
caps = gst_dvd_spu_add_feature_and_intersect (peer_caps,
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION, sw_caps);
gst_caps_unref (sw_caps);
}
gst_caps_unref (peer_caps);
} else {
/* no peer, our padtemplate is enough then */
caps = gst_pad_get_pad_template_caps (pad);
}
if (filter) {
GstCaps *intersection = gst_caps_intersect_full (filter, caps,
GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (caps);
caps = intersection;
}
GST_DEBUG_OBJECT (dvdspu, "returning %" GST_PTR_FORMAT, caps);
return caps;
}
/* With SPU lock held */
static void
update_video_to_position (GstDVDSpu * dvdspu, GstClockTime new_pos)
{
SpuState *state = &dvdspu->spu_state;
#if 0
g_print ("Segment update for video. Advancing from %" GST_TIME_FORMAT
" to %" GST_TIME_FORMAT "\n",
GST_TIME_ARGS (dvdspu->video_seg.position), GST_TIME_ARGS (start));
#endif
while (dvdspu->video_seg.position < new_pos &&
!(state->flags & SPU_STATE_STILL_FRAME)) {
DVD_SPU_UNLOCK (dvdspu);
if (dvdspu_handle_vid_buffer (dvdspu, NULL) != GST_FLOW_OK) {
DVD_SPU_LOCK (dvdspu);
break;
}
DVD_SPU_LOCK (dvdspu);
}
}
static gboolean
gst_dvd_spu_video_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstDVDSpu *dvdspu = (GstDVDSpu *) parent;
SpuState *state = &dvdspu->spu_state;
gboolean res = TRUE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
res = gst_dvd_spu_video_set_caps (dvdspu, pad, caps);
if (res)
res = gst_pad_push_event (dvdspu->srcpad, event);
else
gst_event_unref (event);
break;
}
case GST_EVENT_CUSTOM_DOWNSTREAM:
case GST_EVENT_CUSTOM_DOWNSTREAM_OOB:
{
gboolean in_still;
if (gst_video_event_parse_still_frame (event, &in_still)) {
GstBuffer *to_push = NULL;
/* Forward the event before handling */
res = gst_pad_event_default (pad, parent, event);
GST_DEBUG_OBJECT (dvdspu,
"Still frame event on video pad: in-still = %d", in_still);
DVD_SPU_LOCK (dvdspu);
if (in_still) {
state->flags |= SPU_STATE_STILL_FRAME;
/* Entering still. Advance the SPU to make sure the state is
* up to date */
gst_dvd_spu_check_still_updates (dvdspu);
/* And re-draw the still frame to make sure it appears on
* screen, otherwise the last frame might have been discarded
* by QoS */
gst_dvd_spu_redraw_still (dvdspu, TRUE);
to_push = dvdspu->pending_frame;
dvdspu->pending_frame = NULL;
} else {
state->flags &= ~(SPU_STATE_STILL_FRAME);
}
DVD_SPU_UNLOCK (dvdspu);
if (to_push)
gst_pad_push (dvdspu->srcpad, to_push);
} else {
GST_DEBUG_OBJECT (dvdspu,
"Custom event %" GST_PTR_FORMAT " on video pad", event);
res = gst_pad_event_default (pad, parent, event);
}
break;
}
case GST_EVENT_SEGMENT:
{
GstSegment seg;
gst_event_copy_segment (event, &seg);
if (seg.format != GST_FORMAT_TIME) {
gst_event_unref (event);
return FALSE;
}
/* Only print updates if they have an end time (don't print start_time
* updates */
GST_DEBUG_OBJECT (dvdspu, "video pad Segment: %" GST_SEGMENT_FORMAT,
&seg);
DVD_SPU_LOCK (dvdspu);
if (seg.start > dvdspu->video_seg.position) {
update_video_to_position (dvdspu, seg.start);
}
dvdspu->video_seg = seg;
DVD_SPU_UNLOCK (dvdspu);
res = gst_pad_event_default (pad, parent, event);
break;
}
case GST_EVENT_GAP:
{
GstClockTime timestamp, duration;
gst_event_parse_gap (event, &timestamp, &duration);
if (GST_CLOCK_TIME_IS_VALID (duration))
timestamp += duration;
DVD_SPU_LOCK (dvdspu);
GST_LOG_OBJECT (dvdspu, "Received GAP. Advancing to %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp));
update_video_to_position (dvdspu, timestamp);
DVD_SPU_UNLOCK (dvdspu);
gst_event_unref (event);
break;
}
case GST_EVENT_FLUSH_START:
DVD_SPU_LOCK (dvdspu);
dvdspu->video_flushing = TRUE;
DVD_SPU_UNLOCK (dvdspu);
res = gst_pad_event_default (pad, parent, event);
goto done;
case GST_EVENT_FLUSH_STOP:
res = gst_pad_event_default (pad, parent, event);
DVD_SPU_LOCK (dvdspu);
dvdspu->video_flushing = FALSE;
gst_segment_init (&dvdspu->video_seg, GST_FORMAT_UNDEFINED);
gst_buffer_replace (&dvdspu->ref_frame, NULL);
gst_buffer_replace (&dvdspu->pending_frame, NULL);
DVD_SPU_UNLOCK (dvdspu);
goto done;
default:
res = gst_pad_event_default (pad, parent, event);
break;
}
done:
return res;
#if 0
error:
gst_event_unref (event);
return FALSE;
#endif
}
static gboolean
gst_dvd_spu_video_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstDVDSpu *dvdspu = GST_DVD_SPU (parent);
gboolean res = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CAPS:
{
GstCaps *filter, *caps;
gst_query_parse_caps (query, &filter);
caps = gst_dvd_spu_video_get_caps (dvdspu, pad, filter);
gst_query_set_caps_result (query, caps);
gst_caps_unref (caps);
res = TRUE;
break;
}
default:
res = gst_pad_query_default (pad, parent, query);
break;
}
return res;
}
static GstFlowReturn
gst_dvd_spu_video_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
GstDVDSpu *dvdspu = (GstDVDSpu *) parent;
GstFlowReturn ret;
g_return_val_if_fail (dvdspu != NULL, GST_FLOW_ERROR);
if (gst_pad_check_reconfigure (dvdspu->srcpad))
gst_dvd_spu_negotiate (dvdspu, NULL);
GST_LOG_OBJECT (dvdspu, "video buffer %p with TS %" GST_TIME_FORMAT,
buf, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
ret = dvdspu_handle_vid_buffer (dvdspu, buf);
return ret;
}
static GstFlowReturn
dvdspu_handle_vid_buffer (GstDVDSpu * dvdspu, GstBuffer * buf)
{
GstClockTime new_ts;
GstFlowReturn ret;
gboolean using_ref = FALSE;
DVD_SPU_LOCK (dvdspu);
if (buf == NULL) {
GstClockTime next_ts = dvdspu->video_seg.position;
next_ts += gst_util_uint64_scale_int (GST_SECOND,
dvdspu->spu_state.info.fps_d, dvdspu->spu_state.info.fps_n);
/* NULL buffer was passed - use the reference frame and update the timestamp,
* or else there's nothing to draw, and just return GST_FLOW_OK */
if (dvdspu->ref_frame == NULL) {
dvdspu->video_seg.position = next_ts;
goto no_ref_frame;
}
buf = gst_buffer_copy (dvdspu->ref_frame);
#if 0
g_print ("Duping frame %" GST_TIME_FORMAT " with new TS %" GST_TIME_FORMAT
"\n", GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
GST_TIME_ARGS (next_ts));
#endif
GST_BUFFER_TIMESTAMP (buf) = next_ts;
using_ref = TRUE;
}
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
dvdspu->video_seg.position = GST_BUFFER_TIMESTAMP (buf);
}
new_ts = gst_segment_to_running_time (&dvdspu->video_seg, GST_FORMAT_TIME,
dvdspu->video_seg.position);
#if 0
g_print ("TS %" GST_TIME_FORMAT " running: %" GST_TIME_FORMAT "\n",
GST_TIME_ARGS (dvdspu->video_seg.position), GST_TIME_ARGS (new_ts));
#endif
gst_dvd_spu_advance_spu (dvdspu, new_ts);
/* If we have an active SPU command set, we store a copy of the frame in case
* we hit a still and need to draw on it. Otherwise, a reference is
* sufficient in case we later encounter a still */
if ((dvdspu->spu_state.flags & SPU_STATE_FORCED_DSP) ||
((dvdspu->spu_state.flags & SPU_STATE_FORCED_ONLY) == 0 &&
(dvdspu->spu_state.flags & SPU_STATE_DISPLAY))) {
if (using_ref == FALSE) {
GstBuffer *copy;
/* Take a copy in case we hit a still frame and need the pristine
* frame around */
copy = gst_buffer_copy (buf);
gst_buffer_replace (&dvdspu->ref_frame, copy);
gst_buffer_unref (copy);
}
/* Render the SPU overlay onto the buffer */
buf = gst_buffer_make_writable (buf);
gstspu_render (dvdspu, buf);
} else {
if (using_ref == FALSE) {
/* Not going to draw anything on this frame, just store a reference
* in case we hit a still frame and need it */
gst_buffer_replace (&dvdspu->ref_frame, buf);
}
}
if (dvdspu->spu_state.flags & SPU_STATE_STILL_FRAME) {
GST_DEBUG_OBJECT (dvdspu, "Outputting buffer with TS %" GST_TIME_FORMAT
"from chain while in still",
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
}
DVD_SPU_UNLOCK (dvdspu);
/* just push out the incoming buffer without touching it */
ret = gst_pad_push (dvdspu->srcpad, buf);
return ret;
no_ref_frame:
DVD_SPU_UNLOCK (dvdspu);
return GST_FLOW_OK;
}
/*
* Transform the overlay composition rectangle to fit completely in the video.
* This is needed to work with ripped videos, which might be cropped and scaled
* compared to the original (for example to remove black borders). The same
* transformations were probably not applied to the SPU data, so we need to fit
* the rendered SPU to the video.
*/
static gboolean
gstspu_fit_overlay_rectangle (GstDVDSpu * dvdspu, GstVideoRectangle * rect,
gint spu_width, gint spu_height, gboolean keep_aspect)
{
gint video_width = GST_VIDEO_INFO_WIDTH (&dvdspu->spu_state.info);
gint video_height = GST_VIDEO_INFO_HEIGHT (&dvdspu->spu_state.info);
GstVideoRectangle r;
r = *rect;
/*
* Compute scale first, so that the SPU window size matches the video size.
* If @keep_aspect is %TRUE, the overlay rectangle aspect is kept and
* centered around the video.
*/
if (spu_width != video_width || spu_height != video_height) {
gdouble hscale, vscale;
hscale = (gdouble) video_width / (gdouble) spu_width;
vscale = (gdouble) video_height / (gdouble) spu_height;
if (keep_aspect) {
if (vscale < hscale)
vscale = hscale;
else if (hscale < vscale)
hscale = vscale;
}
r.x *= hscale;
r.y *= vscale;
r.w *= hscale;
r.h *= vscale;
if (keep_aspect) {
r.x += (video_width - (spu_width * hscale)) / 2;
r.y += (video_height - (spu_height * vscale)) / 2;
}
}
/*
* Next fit the overlay rectangle inside the video, to avoid cropping.
*/
if (r.x + r.w > video_width)
r.x = video_width - r.w;
if (r.x < 0) {
r.x = 0;
if (r.w > video_width)
r.w = video_width;
}
if (r.y + r.h > video_height)
r.y = video_height - r.h;
if (r.y < 0) {
r.y = 0;
if (r.h > video_height)
r.h = video_height;
}
if (r.x != rect->x || r.y != rect->y || r.w != rect->w || r.h != rect->h) {
*rect = r;
return TRUE;
}
return FALSE;
}
static GstVideoOverlayComposition *
gstspu_render_composition (GstDVDSpu * dvdspu)
{
GstBuffer *buffer;
GstVideoInfo overlay_info;
GstVideoFormat format;
GstVideoFrame frame;
GstVideoOverlayRectangle *rectangle;
GstVideoOverlayComposition *composition;
GstVideoRectangle win;
gint spu_w, spu_h;
gsize size;
format = GST_VIDEO_OVERLAY_COMPOSITION_FORMAT_RGB;
switch (dvdspu->spu_input_type) {
case SPU_INPUT_TYPE_PGS:
gstspu_pgs_get_render_geometry (dvdspu, &spu_w, &spu_h, &win);
break;
case SPU_INPUT_TYPE_VOBSUB:
gstspu_vobsub_get_render_geometry (dvdspu, &spu_w, &spu_h, &win);
break;
default:
return NULL;
}
if (win.w <= 0 || win.h <= 0 || spu_w <= 0 || spu_h <= 0) {
GST_DEBUG_OBJECT (dvdspu, "skip render of empty window");
return NULL;
}
gst_video_info_init (&overlay_info);
gst_video_info_set_format (&overlay_info, format, win.w, win.h);
size = GST_VIDEO_INFO_SIZE (&overlay_info);
buffer = gst_buffer_new_and_alloc (size);
if (!buffer) {
GST_WARNING_OBJECT (dvdspu, "failed to allocate overlay buffer");
return NULL;
}
gst_buffer_add_video_meta (buffer, GST_VIDEO_FRAME_FLAG_NONE,
format, win.w, win.h);
if (!gst_video_frame_map (&frame, &overlay_info, buffer, GST_MAP_READWRITE))
goto map_failed;
memset (GST_VIDEO_FRAME_PLANE_DATA (&frame, 0), 0,
GST_VIDEO_FRAME_PLANE_STRIDE (&frame, 0) *
GST_VIDEO_FRAME_HEIGHT (&frame));
switch (dvdspu->spu_input_type) {
case SPU_INPUT_TYPE_VOBSUB:
gstspu_vobsub_render (dvdspu, &frame);
break;
case SPU_INPUT_TYPE_PGS:
gstspu_pgs_render (dvdspu, &frame);
break;
default:
break;
}
gst_video_frame_unmap (&frame);
GST_DEBUG_OBJECT (dvdspu, "Overlay rendered for video size %dx%d, "
"spu display size %dx%d, window geometry %dx%d+%d%+d",
GST_VIDEO_INFO_WIDTH (&dvdspu->spu_state.info),
GST_VIDEO_INFO_HEIGHT (&dvdspu->spu_state.info),
spu_w, spu_h, win.w, win.h, win.x, win.y);
if (gstspu_fit_overlay_rectangle (dvdspu, &win, spu_w, spu_h,
dvdspu->spu_input_type == SPU_INPUT_TYPE_PGS))
GST_DEBUG_OBJECT (dvdspu, "Adjusted window to fit video: %dx%d%+d%+d",
win.w, win.h, win.x, win.y);
rectangle = gst_video_overlay_rectangle_new_raw (buffer, win.x, win.y,
win.w, win.h, GST_VIDEO_OVERLAY_FORMAT_FLAG_PREMULTIPLIED_ALPHA);
gst_buffer_unref (buffer);
composition = gst_video_overlay_composition_new (rectangle);
gst_video_overlay_rectangle_unref (rectangle);
return composition;
map_failed:
GST_ERROR_OBJECT (dvdspu, "failed to map buffer");
gst_buffer_unref (buffer);
return NULL;
}
static void
gstspu_render (GstDVDSpu * dvdspu, GstBuffer * buf)
{
GstVideoOverlayComposition *composition;
GstVideoFrame frame;
if (!dvdspu->composition) {
dvdspu->composition = gstspu_render_composition (dvdspu);
if (!dvdspu->composition)
return;
}
composition = dvdspu->composition;
if (dvdspu->attach_compo_to_buffer) {
gst_buffer_add_video_overlay_composition_meta (buf, composition);
return;
}
if (!gst_video_frame_map (&frame, &dvdspu->spu_state.info, buf,
GST_MAP_READWRITE)) {
GST_WARNING_OBJECT (dvdspu, "failed to map video frame for blending");
return;
}
gst_video_overlay_composition_blend (composition, &frame);
gst_video_frame_unmap (&frame);
}
/* With SPU LOCK */
static void
gst_dvd_spu_redraw_still (GstDVDSpu * dvdspu, gboolean force)
{
/* If we have an active SPU command set and a reference frame, copy the
* frame, redraw the SPU and store it as the pending frame for output */
if (dvdspu->ref_frame) {
gboolean redraw = (dvdspu->spu_state.flags & SPU_STATE_FORCED_DSP);
redraw |= (dvdspu->spu_state.flags & SPU_STATE_FORCED_ONLY) == 0 &&
(dvdspu->spu_state.flags & SPU_STATE_DISPLAY);
if (redraw) {
GstBuffer *buf = gst_buffer_ref (dvdspu->ref_frame);
buf = gst_buffer_make_writable (buf);
GST_LOG_OBJECT (dvdspu, "Redraw due to Still Frame with ref %p",
dvdspu->ref_frame);
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
GST_BUFFER_DURATION (buf) = GST_CLOCK_TIME_NONE;
/* Render the SPU overlay onto the buffer */
gstspu_render (dvdspu, buf);
gst_buffer_replace (&dvdspu->pending_frame, buf);
gst_buffer_unref (buf);
} else if (force) {
/* Simply output the reference frame */
GstBuffer *buf = gst_buffer_ref (dvdspu->ref_frame);
buf = gst_buffer_make_writable (buf);
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
GST_BUFFER_DURATION (buf) = GST_CLOCK_TIME_NONE;
GST_DEBUG_OBJECT (dvdspu, "Pushing reference frame at start of still");
gst_buffer_replace (&dvdspu->pending_frame, buf);
gst_buffer_unref (buf);
} else {
GST_LOG_OBJECT (dvdspu, "Redraw due to Still Frame skipped");
}
} else {
GST_LOG_OBJECT (dvdspu, "Not redrawing still frame - no ref frame");
}
}
static void
gst_dvd_spu_handle_dvd_event (GstDVDSpu * dvdspu, GstEvent * event)
{
gboolean hl_change = FALSE;
GST_INFO_OBJECT (dvdspu, "DVD event of type %s on subp pad OOB=%d",
gst_structure_get_string (gst_event_get_structure (event), "event"),
(GST_EVENT_TYPE (event) == GST_EVENT_CUSTOM_DOWNSTREAM_OOB));
switch (dvdspu->spu_input_type) {
case SPU_INPUT_TYPE_VOBSUB:
hl_change = gstspu_vobsub_handle_dvd_event (dvdspu, event);
break;
case SPU_INPUT_TYPE_PGS:
hl_change = gstspu_pgs_handle_dvd_event (dvdspu, event);
break;
default:
break;
}
if (hl_change)
gst_dvd_spu_reset_composition (dvdspu);
if (hl_change && (dvdspu->spu_state.flags & SPU_STATE_STILL_FRAME)) {
gst_dvd_spu_redraw_still (dvdspu, FALSE);
}
}
static gboolean
gstspu_execute_event (GstDVDSpu * dvdspu)
{
switch (dvdspu->spu_input_type) {
case SPU_INPUT_TYPE_VOBSUB:
return gstspu_vobsub_execute_event (dvdspu);
break;
case SPU_INPUT_TYPE_PGS:
return gstspu_pgs_execute_event (dvdspu);
break;
default:
g_assert_not_reached ();
break;
}
return FALSE;
}
/* Advance the SPU packet/command queue to a time. new_ts is in running time */
static void
gst_dvd_spu_advance_spu (GstDVDSpu * dvdspu, GstClockTime new_ts)
{
SpuState *state = &dvdspu->spu_state;
if (G_UNLIKELY (dvdspu->spu_input_type == SPU_INPUT_TYPE_NONE))
return;
while (state->next_ts == GST_CLOCK_TIME_NONE || state->next_ts <= new_ts) {
GST_DEBUG_OBJECT (dvdspu,
"Advancing SPU from TS %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT,
GST_TIME_ARGS (state->next_ts), GST_TIME_ARGS (new_ts));
if (!gstspu_execute_event (dvdspu)) {
/* No current command buffer, try and get one */
SpuPacket *packet = (SpuPacket *) g_queue_pop_head (dvdspu->pending_spus);
if (packet == NULL)
return; /* No SPU packets available */
GST_LOG_OBJECT (dvdspu,
"Popped new SPU packet with TS %" GST_TIME_FORMAT
". Video position=%" GST_TIME_FORMAT " (%" GST_TIME_FORMAT
") type %s",
GST_TIME_ARGS (packet->event_ts),
GST_TIME_ARGS (gst_segment_to_running_time (&dvdspu->video_seg,
GST_FORMAT_TIME, dvdspu->video_seg.position)),
GST_TIME_ARGS (dvdspu->video_seg.position),
packet->buf ? "buffer" : "event");
gst_dvd_spu_reset_composition (dvdspu);
if (packet->buf) {
switch (dvdspu->spu_input_type) {
case SPU_INPUT_TYPE_VOBSUB:
gstspu_vobsub_handle_new_buf (dvdspu, packet->event_ts,
packet->buf);
break;
case SPU_INPUT_TYPE_PGS:
gstspu_pgs_handle_new_buf (dvdspu, packet->event_ts, packet->buf);
break;
default:
g_assert_not_reached ();
break;
}
g_assert (packet->event == NULL);
} else if (packet->event)
gst_dvd_spu_handle_dvd_event (dvdspu, packet->event);
g_free (packet);
continue;
}
}
}
static void
gst_dvd_spu_check_still_updates (GstDVDSpu * dvdspu)
{
GstClockTime sub_ts;
GstClockTime vid_ts;
if (dvdspu->spu_state.flags & SPU_STATE_STILL_FRAME) {
if (dvdspu->video_seg.format != GST_FORMAT_TIME)
return; /* No video segment or frames yet */
vid_ts = gst_segment_to_running_time (&dvdspu->video_seg,
GST_FORMAT_TIME, dvdspu->video_seg.position);
sub_ts = gst_segment_to_running_time (&dvdspu->subp_seg,
GST_FORMAT_TIME, dvdspu->subp_seg.position);
vid_ts = MAX (vid_ts, sub_ts);
GST_DEBUG_OBJECT (dvdspu,
"In still frame - advancing TS to %" GST_TIME_FORMAT
" to process SPU buffer", GST_TIME_ARGS (vid_ts));
gst_dvd_spu_advance_spu (dvdspu, vid_ts);
}
}
static void
submit_new_spu_packet (GstDVDSpu * dvdspu, GstBuffer * buf)
{
SpuPacket *spu_packet;
GstClockTime ts;
GstClockTime run_ts = GST_CLOCK_TIME_NONE;
GST_DEBUG_OBJECT (dvdspu,
"Complete subpicture buffer of %" G_GSIZE_FORMAT " bytes with TS %"
GST_TIME_FORMAT, gst_buffer_get_size (buf),
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
/* Decide whether to pass this buffer through to the rendering code */
ts = GST_BUFFER_TIMESTAMP (buf);
if (GST_CLOCK_TIME_IS_VALID (ts)) {
if (ts < (GstClockTime) dvdspu->subp_seg.start) {
GstClockTimeDiff diff = dvdspu->subp_seg.start - ts;
/* Buffer starts before segment, see if we can calculate a running time */
run_ts =
gst_segment_to_running_time (&dvdspu->subp_seg, GST_FORMAT_TIME,
dvdspu->subp_seg.start);
if (run_ts >= (GstClockTime) diff)
run_ts -= diff;
else
run_ts = GST_CLOCK_TIME_NONE; /* No running time possible for this subpic */
} else {
/* TS within segment, convert to running time */
run_ts =
gst_segment_to_running_time (&dvdspu->subp_seg, GST_FORMAT_TIME, ts);
}
}
if (GST_CLOCK_TIME_IS_VALID (run_ts)) {
/* Complete SPU packet, push it onto the queue for processing when
* video packets come past */
spu_packet = g_new0 (SpuPacket, 1);
spu_packet->buf = buf;
/* Store the activation time of this buffer in running time */
spu_packet->event_ts = run_ts;
GST_INFO_OBJECT (dvdspu,
"Pushing SPU buf with TS %" GST_TIME_FORMAT " running time %"
GST_TIME_FORMAT, GST_TIME_ARGS (ts),
GST_TIME_ARGS (spu_packet->event_ts));
g_queue_push_tail (dvdspu->pending_spus, spu_packet);
/* In a still frame condition, advance the SPU to make sure the state is
* up to date */
gst_dvd_spu_check_still_updates (dvdspu);
} else {
gst_buffer_unref (buf);
}
}
static gboolean
gst_dvd_spu_negotiate (GstDVDSpu * dvdspu, GstCaps * caps)
{
gboolean upstream_has_meta = FALSE;
gboolean caps_has_meta = FALSE;
gboolean alloc_has_meta = FALSE;
gboolean attach = FALSE;
gboolean ret = TRUE;
GstCapsFeatures *f;
GstCaps *overlay_caps;
GstQuery *query;
GST_DEBUG_OBJECT (dvdspu, "performing negotiation");
/* Clear the cached composition */
gst_dvd_spu_reset_composition (dvdspu);
/* Clear any pending reconfigure to avoid negotiating twice */
gst_pad_check_reconfigure (dvdspu->srcpad);
if (!caps)
caps = gst_pad_get_current_caps (dvdspu->videosinkpad);
else
gst_caps_ref (caps);
if (!caps || gst_caps_is_empty (caps))
goto no_format;
/* Check if upstream caps have meta */
if ((f = gst_caps_get_features (caps, 0))) {
upstream_has_meta = gst_caps_features_contains (f,
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION);
}
if (upstream_has_meta) {
overlay_caps = gst_caps_ref (caps);
} else {
GstCaps *peercaps;
/* BaseTransform requires caps for the allocation query to work */
overlay_caps = gst_caps_copy (caps);
f = gst_caps_get_features (overlay_caps, 0);
gst_caps_features_add (f,
GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION);
/* Then check if downstream accept dvdspu composition in caps */
/* FIXME: We should probably check if downstream *prefers* the
* dvdspu meta, and only enforce usage of it if we can't handle
* the format ourselves and thus would have to drop the overlays.
* Otherwise we should prefer what downstream wants here.
*/
peercaps = gst_pad_peer_query_caps (dvdspu->srcpad, NULL);
caps_has_meta = gst_caps_can_intersect (peercaps, overlay_caps);
gst_caps_unref (peercaps);
GST_DEBUG ("caps have dvdspu meta %d", caps_has_meta);
}
if (upstream_has_meta || caps_has_meta) {
/* Send caps immediatly, it's needed by GstBaseTransform to get a reply
* from allocation query */
ret = gst_pad_set_caps (dvdspu->srcpad, overlay_caps);
/* First check if the allocation meta has compositon */
query = gst_query_new_allocation (overlay_caps, FALSE);
if (!gst_pad_peer_query (dvdspu->srcpad, query)) {
/* no problem, we use the query defaults */
GST_DEBUG_OBJECT (dvdspu, "ALLOCATION query failed");
/* In case we were flushing, mark reconfigure and fail this method,
* will make it retry */
if (dvdspu->video_flushing)
ret = FALSE;
}
alloc_has_meta = gst_query_find_allocation_meta (query,
GST_VIDEO_OVERLAY_COMPOSITION_META_API_TYPE, NULL);
GST_DEBUG ("sink alloc has dvdspu meta %d", alloc_has_meta);
gst_query_unref (query);
}
/* For backward compatbility, we will prefer bliting if downstream
* allocation does not support the meta. In other case we will prefer
* attaching, and will fail the negotiation in the unlikely case we are
* force to blit, but format isn't supported. */
if (upstream_has_meta) {
attach = TRUE;
} else if (caps_has_meta) {
if (alloc_has_meta) {
attach = TRUE;
} else {
/* Don't attach unless we cannot handle the format */
attach = !gst_dvd_spu_can_handle_caps (caps);
}
} else {
ret = gst_dvd_spu_can_handle_caps (caps);
}
/* If we attach, then pick the dvdspu caps */
if (attach) {
GST_DEBUG_OBJECT (dvdspu, "Using caps %" GST_PTR_FORMAT, overlay_caps);
/* Caps where already sent */
} else if (ret) {
GST_DEBUG_OBJECT (dvdspu, "Using caps %" GST_PTR_FORMAT, caps);
ret = gst_pad_set_caps (dvdspu->srcpad, caps);
}
dvdspu->attach_compo_to_buffer = attach;
if (!ret) {
GST_DEBUG_OBJECT (dvdspu, "negotiation failed, schedule reconfigure");
gst_pad_mark_reconfigure (dvdspu->srcpad);
}
gst_caps_unref (overlay_caps);
gst_caps_unref (caps);
return ret;
no_format:
{
if (caps)
gst_caps_unref (caps);
return FALSE;
}
}
static GstFlowReturn
gst_dvd_spu_subpic_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
GstDVDSpu *dvdspu = (GstDVDSpu *) parent;
GstFlowReturn ret = GST_FLOW_OK;
gsize size;
g_return_val_if_fail (dvdspu != NULL, GST_FLOW_ERROR);
GST_INFO_OBJECT (dvdspu, "Have subpicture buffer with timestamp %"
GST_TIME_FORMAT " and size %" G_GSIZE_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), gst_buffer_get_size (buf));
DVD_SPU_LOCK (dvdspu);
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
dvdspu->subp_seg.position = GST_BUFFER_TIMESTAMP (buf);
}
if (GST_BUFFER_IS_DISCONT (buf) && dvdspu->partial_spu) {
gst_buffer_unref (dvdspu->partial_spu);
dvdspu->partial_spu = NULL;
}
if (dvdspu->partial_spu != NULL) {
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf))
GST_WARNING_OBJECT (dvdspu,
"Joining subpicture buffer with timestamp to previous");
dvdspu->partial_spu = gst_buffer_append (dvdspu->partial_spu, buf);
} else {
/* If we don't yet have a buffer, wait for one with a timestamp,
* since that will avoid collecting the 2nd half of a partial buf */
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf))
dvdspu->partial_spu = buf;
else
gst_buffer_unref (buf);
}
if (dvdspu->partial_spu == NULL)
goto done;
size = gst_buffer_get_size (dvdspu->partial_spu);
switch (dvdspu->spu_input_type) {
case SPU_INPUT_TYPE_VOBSUB:
if (size >= 2) {
guint8 header[2];
guint16 packet_size;
gst_buffer_extract (dvdspu->partial_spu, 0, header, 2);
packet_size = GST_READ_UINT16_BE (header);
if (packet_size == size) {
submit_new_spu_packet (dvdspu, dvdspu->partial_spu);
dvdspu->partial_spu = NULL;
} else if (packet_size == 0) {
GST_LOG_OBJECT (dvdspu, "Discarding empty SPU buffer");
gst_buffer_unref (dvdspu->partial_spu);
dvdspu->partial_spu = NULL;
} else if (packet_size < size) {
/* Somehow we collected too much - something is wrong. Drop the
* packet entirely and wait for a new one */
GST_DEBUG_OBJECT (dvdspu,
"Discarding invalid SPU buffer of size %" G_GSIZE_FORMAT, size);
gst_buffer_unref (dvdspu->partial_spu);
dvdspu->partial_spu = NULL;
} else {
GST_LOG_OBJECT (dvdspu,
"SPU buffer claims to be of size %u. Collected %" G_GSIZE_FORMAT
" so far.", packet_size, size);
}
}
break;
case SPU_INPUT_TYPE_PGS:{
/* Collect until we have a command buffer that ends exactly at the size
* we've collected */
guint8 packet_type;
guint16 packet_size;
GstMapInfo map;
guint8 *ptr, *end;
gboolean invalid = FALSE;
gst_buffer_map (dvdspu->partial_spu, &map, GST_MAP_READ);
ptr = map.data;
end = ptr + map.size;
/* FIXME: There's no need to walk the command set each time. We can set a
* marker and resume where we left off next time */
/* FIXME: Move the packet parsing and sanity checking into the format-specific modules */
while (ptr != end) {
if (ptr + 3 > end)
break;
packet_type = *ptr++;
packet_size = GST_READ_UINT16_BE (ptr);
ptr += 2;
if (ptr + packet_size > end)
break;
ptr += packet_size;
/* 0x80 is the END command for PGS packets */
if (packet_type == 0x80 && ptr != end) {
/* Extra cruft on the end of the packet -> assume invalid */
invalid = TRUE;
break;
}
}
gst_buffer_unmap (dvdspu->partial_spu, &map);
if (invalid) {
gst_buffer_unref (dvdspu->partial_spu);
dvdspu->partial_spu = NULL;
} else if (ptr == end) {
GST_DEBUG_OBJECT (dvdspu,
"Have complete PGS packet of size %" G_GSIZE_FORMAT ". Enqueueing.",
map.size);
submit_new_spu_packet (dvdspu, dvdspu->partial_spu);
dvdspu->partial_spu = NULL;
}
break;
}
default:
GST_ERROR_OBJECT (dvdspu, "Input type not configured before SPU passing");
goto caps_not_set;
}
done:
DVD_SPU_UNLOCK (dvdspu);
return ret;
/* ERRORS */
caps_not_set:
{
GST_ELEMENT_ERROR (dvdspu, RESOURCE, NO_SPACE_LEFT,
(_("Subpicture format was not configured before data flow")), (NULL));
ret = GST_FLOW_ERROR;
goto done;
}
}
static gboolean
gst_dvd_spu_subpic_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstDVDSpu *dvdspu = (GstDVDSpu *) parent;
gboolean res = TRUE;
/* Some events on the subpicture sink pad just get ignored, like
* FLUSH_START */
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
res = gst_dvd_spu_subpic_set_caps (dvdspu, pad, caps);
gst_event_unref (event);
break;
}
case GST_EVENT_CUSTOM_DOWNSTREAM:
case GST_EVENT_CUSTOM_DOWNSTREAM_STICKY:
case GST_EVENT_CUSTOM_DOWNSTREAM_OOB:
{
const GstStructure *structure = gst_event_get_structure (event);
const gchar *name = gst_structure_get_name (structure);
gboolean need_push;
if (!g_str_has_prefix (name, "application/x-gst-dvd")) {
res = gst_pad_event_default (pad, parent, event);
break;
}
DVD_SPU_LOCK (dvdspu);
if (GST_EVENT_IS_SERIALIZED (event)) {
SpuPacket *spu_packet = g_new0 (SpuPacket, 1);
GST_DEBUG_OBJECT (dvdspu,
"Enqueueing DVD event on subpicture pad for later");
spu_packet->event = event;
g_queue_push_tail (dvdspu->pending_spus, spu_packet);
} else {
gst_dvd_spu_handle_dvd_event (dvdspu, event);
}
/* If the handle_dvd_event generated a pending frame, we
* need to synchronise with the video pad's stream lock and push it.
* This requires some dancing to preserve locking order and handle
* flushes correctly */
need_push = (dvdspu->pending_frame != NULL);
DVD_SPU_UNLOCK (dvdspu);
if (need_push) {
GstBuffer *to_push = NULL;
gboolean flushing;
GST_LOG_OBJECT (dvdspu, "Going for stream lock");
GST_PAD_STREAM_LOCK (dvdspu->videosinkpad);
GST_LOG_OBJECT (dvdspu, "Got stream lock");
GST_OBJECT_LOCK (dvdspu->videosinkpad);
flushing = GST_PAD_IS_FLUSHING (dvdspu->videosinkpad);
GST_OBJECT_UNLOCK (dvdspu->videosinkpad);
DVD_SPU_LOCK (dvdspu);
if (dvdspu->pending_frame == NULL || flushing) {
/* Got flushed while waiting for the stream lock */
DVD_SPU_UNLOCK (dvdspu);
} else {
to_push = dvdspu->pending_frame;
dvdspu->pending_frame = NULL;
DVD_SPU_UNLOCK (dvdspu);
gst_pad_push (dvdspu->srcpad, to_push);
}
GST_LOG_OBJECT (dvdspu, "Dropping stream lock");
GST_PAD_STREAM_UNLOCK (dvdspu->videosinkpad);
}
break;
}
case GST_EVENT_SEGMENT:
{
GstSegment seg;
gst_event_copy_segment (event, &seg);
/* Only print updates if they have an end time (don't print start_time
* updates */
GST_DEBUG_OBJECT (dvdspu, "subpic pad Segment: %" GST_SEGMENT_FORMAT,
&seg);
DVD_SPU_LOCK (dvdspu);
dvdspu->subp_seg = seg;
GST_LOG_OBJECT (dvdspu, "Subpicture segment now: %" GST_SEGMENT_FORMAT,
&dvdspu->subp_seg);
DVD_SPU_UNLOCK (dvdspu);
gst_event_unref (event);
break;
}
case GST_EVENT_GAP:
{
GstClockTime timestamp, duration;
gst_event_parse_gap (event, &timestamp, &duration);
if (GST_CLOCK_TIME_IS_VALID (duration))
timestamp += duration;
DVD_SPU_LOCK (dvdspu);
dvdspu->subp_seg.position = timestamp;
GST_LOG_OBJECT (dvdspu, "Received GAP. Segment now: %" GST_SEGMENT_FORMAT,
&dvdspu->subp_seg);
DVD_SPU_UNLOCK (dvdspu);
gst_event_unref (event);
break;
}
case GST_EVENT_FLUSH_START:
gst_event_unref (event);
goto done;
case GST_EVENT_FLUSH_STOP:
GST_DEBUG_OBJECT (dvdspu, "Have flush-stop event on SPU pad");
DVD_SPU_LOCK (dvdspu);
gst_segment_init (&dvdspu->subp_seg, GST_FORMAT_UNDEFINED);
gst_dvd_spu_flush_spu_info (dvdspu, TRUE);
DVD_SPU_UNLOCK (dvdspu);
/* We don't forward flushes on the spu pad */
gst_event_unref (event);
goto done;
case GST_EVENT_EOS:
/* drop EOS on the subtitle pad, it means there are no more subtitles,
* video might still continue, though */
gst_event_unref (event);
goto done;
default:
res = gst_pad_event_default (pad, parent, event);
break;
}
done:
return res;
}
static gboolean
gst_dvd_spu_subpic_set_caps (GstDVDSpu * dvdspu, GstPad * pad, GstCaps * caps)
{
gboolean res = FALSE;
GstStructure *s;
SpuInputType input_type;
s = gst_caps_get_structure (caps, 0);
if (gst_structure_has_name (s, "subpicture/x-dvd")) {
input_type = SPU_INPUT_TYPE_VOBSUB;
} else if (gst_structure_has_name (s, "subpicture/x-pgs")) {
input_type = SPU_INPUT_TYPE_PGS;
} else {
goto done;
}
DVD_SPU_LOCK (dvdspu);
if (dvdspu->spu_input_type != input_type) {
GST_INFO_OBJECT (dvdspu, "Incoming SPU packet type changed to %u",
input_type);
dvdspu->spu_input_type = input_type;
gst_dvd_spu_flush_spu_info (dvdspu, TRUE);
}
DVD_SPU_UNLOCK (dvdspu);
res = TRUE;
done:
return res;
}
static GstStateChangeReturn
gst_dvd_spu_change_state (GstElement * element, GstStateChange transition)
{
GstDVDSpu *dvdspu = (GstDVDSpu *) element;
GstStateChangeReturn ret;
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
DVD_SPU_LOCK (dvdspu);
gst_dvd_spu_clear (dvdspu);
DVD_SPU_UNLOCK (dvdspu);
break;
default:
break;
}
return ret;
}
static gboolean
dvd_spu_element_init (GstPlugin * plugin)
{
const gchar *env;
GST_DEBUG_CATEGORY_INIT (dvdspu_debug, "gstspu",
0, "Sub-picture Overlay decoder/renderer");
env = g_getenv ("GST_DVD_SPU_DEBUG");
dvdspu_debug_flags = 0;
if (env != NULL) {
if (strstr (env, "render-rectangle") != NULL)
dvdspu_debug_flags |= GST_DVD_SPU_DEBUG_RENDER_RECTANGLE;
if (strstr (env, "highlight-rectangle") != NULL)
dvdspu_debug_flags |= GST_DVD_SPU_DEBUG_HIGHLIGHT_RECTANGLE;
}
GST_INFO ("debug flags : 0x%02x", dvdspu_debug_flags);
return gst_element_register (plugin, "dvdspu",
GST_RANK_PRIMARY, GST_TYPE_DVD_SPU);
}
static gboolean
gst_dvd_spu_plugin_init (GstPlugin * plugin)
{
return GST_ELEMENT_REGISTER (dvdspu, plugin);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
dvdspu,
"DVD Sub-picture Overlay element",
gst_dvd_spu_plugin_init,
VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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