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gstreamer/gst/dvdspu/gstdvdspu.c
Vineeth TM 0812437293 dvdspu: Fix event leaks 
When playing mts files with embedded subtitles, there are few event leaks.
Events are supposed to be transfer full. So if not forwarding the event,
they need to be freed.

https://bugzilla.gnome.org/show_bug.cgi?id=753539
2015-08-13 14:38:03 +01:00

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37 KiB
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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
*
* DVD sub picture overlay element.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* FIXME: gst-launch ...
* ]| FIXME: description for the sample launch pipeline
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <gst/gst-i18n-plugin.h>
#include <gst/video/video.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
};
static GstStaticPadTemplate video_sink_factory =
GST_STATIC_PAD_TEMPLATE ("video",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw, " "format = (string) { I420, NV12, YV12 }, "
"width = (int) [ 16, 4096 ], " "height = (int) [ 16, 4096 ]")
);
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw, " "format = (string) { I420, NV12, YV12 }, "
"width = (int) [ 16, 4096 ], " "height = (int) [ 16, 4096 ]")
);
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")
);
#define gst_dvd_spu_parent_class parent_class
G_DEFINE_TYPE (GstDVDSpu, gst_dvd_spu, GST_TYPE_ELEMENT);
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_video_proxy_getcaps (GstPad * pad,
GstCaps * filter);
static gboolean gst_dvd_spu_video_set_caps (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 (GstPad * pad, 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_pad_template (gstelement_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&video_sink_factory));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&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_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);
gint i;
for (i = 0; i < 3; i++) {
if (dvdspu->spu_state.comp_bufs[i] != NULL) {
g_free (dvdspu->spu_state.comp_bufs[i]);
dvdspu->spu_state.comp_bufs[i] = NULL;
}
}
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;
}
}
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)
{
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_proxy_getcaps (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_video_set_caps (GstPad * pad, GstCaps * caps)
{
GstDVDSpu *dvdspu = GST_DVD_SPU (gst_pad_get_parent (pad));
gboolean res = FALSE;
GstVideoInfo info;
gint i;
SpuState *state;
if (!gst_video_info_from_caps (&info, caps))
goto done;
DVD_SPU_LOCK (dvdspu);
state = &dvdspu->spu_state;
state->info = info;
for (i = 0; i < 3; i++) {
state->comp_bufs[i] = g_realloc (state->comp_bufs[i],
sizeof (guint32) * info.width);
}
DVD_SPU_UNLOCK (dvdspu);
res = TRUE;
done:
gst_object_unref (dvdspu);
return res;
}
static GstCaps *
gst_dvd_spu_video_proxy_getcaps (GstPad * pad, GstCaps * filter)
{
GstDVDSpu *dvdspu = GST_DVD_SPU (gst_pad_get_parent (pad));
GstCaps *caps;
GstPad *otherpad;
/* Proxy the getcaps between videosink and the srcpad, ignoring the
* subpicture sink pad */
otherpad = (pad == dvdspu->srcpad) ? dvdspu->videosinkpad : dvdspu->srcpad;
caps = gst_pad_peer_query_caps (otherpad, filter);
if (caps) {
GstCaps *temp, *templ;
templ = gst_pad_get_pad_template_caps (otherpad);
temp = gst_caps_intersect (caps, templ);
gst_caps_unref (templ);
gst_caps_unref (caps);
caps = temp;
} else {
caps = gst_pad_get_pad_template_caps (pad);
}
gst_object_unref (dvdspu);
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 (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:
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);
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)
{
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_proxy_getcaps (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);
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;
}
static void
gstspu_render (GstDVDSpu * dvdspu, GstBuffer * buf)
{
GstVideoFrame frame;
gst_video_frame_map (&frame, &dvdspu->spu_state.info, buf, GST_MAP_READWRITE);
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);
}
/* 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 && (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");
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 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 (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);
gboolean need_push;
if (!gst_structure_has_name (structure, "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 (GstPad * pad, GstCaps * caps)
{
GstDVDSpu *dvdspu = GST_DVD_SPU (gst_pad_get_parent (pad));
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:
gst_object_unref (dvdspu);
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
gst_dvd_spu_plugin_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);
}
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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