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gstreamer/gst/dvdspu/gstdvdspu.c
Jan Schmidt 29b44a5e2f dvdspu: Push update frame, if any, when entering stills. 
When entering a still frame generates an updated buffer, make sure
to push it out, otherwise we may not put a frame onscreen with a
rendered button, causing raciness as to whether buttons get drawn
or not when jumping back to the menu on some discs.
2009-05-14 11:28:14 +01:00

1448 lines
44 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, 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 <string.h>
#include <gst/gst.h>
#include "gstdvdspu.h"
#define DUMP_DCSQ 0
extern void gst_dvd_spu_render_spu (GstDVDSpu * dvdspu, GstBuffer * buf);
GST_DEBUG_CATEGORY (dvdspu_debug);
#define GST_CAT_DEFAULT dvdspu_debug
/* Convert an STM offset in the SPU sequence to a GStreamer timestamp */
#define STM_TO_GST(stm) ((GST_MSECOND * 1024 * (stm)) / 90)
/* 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-yuv, " "format = (fourcc) { I420 }, "
"width = (int) [ 16, 4096 ], " "height = (int) [ 16, 4096 ]")
/* FIXME: Can support YV12 one day too */
);
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-raw-yuv, " "format = (fourcc) { I420 }, "
"width = (int) [ 16, 4096 ], " "height = (int) [ 16, 4096 ]")
/* FIXME: Can support YV12 one day too */
);
static GstStaticPadTemplate subpic_sink_factory =
GST_STATIC_PAD_TEMPLATE ("subpicture",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-dvd-subpicture")
);
GST_BOILERPLATE (GstDVDSpu, gst_dvd_spu, GstElement, 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, GstEvent * event);
static GstCaps *gst_dvd_spu_video_proxy_getcaps (GstPad * pad);
static gboolean gst_dvd_spu_video_set_caps (GstPad * pad, GstCaps * caps);
static GstFlowReturn gst_dvd_spu_video_chain (GstPad * pad, GstBuffer * buf);
static gboolean gst_dvd_spu_video_event (GstPad * pad, GstEvent * event);
static GstFlowReturn gst_dvd_spu_buffer_alloc (GstPad * sinkpad, guint64 offset,
guint size, GstCaps * caps, GstBuffer ** buf);
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, GstBuffer * buf);
static gboolean gst_dvd_spu_subpic_event (GstPad * pad, GstEvent * event);
static void gst_dvd_spu_clear (GstDVDSpu * dvdspu);
static void gst_dvd_spu_flush_spu_info (GstDVDSpu * dvdspu);
static void gst_dvd_spu_advance_spu (GstDVDSpu * dvdspu, GstClockTime new_ts);
static GstFlowReturn
dvdspu_handle_vid_buffer (GstDVDSpu * dvdspu, GstBuffer * buf);
static void
gst_dvd_spu_base_init (gpointer gclass)
{
static GstElementDetails element_details =
GST_ELEMENT_DETAILS ("Fluendo DVD Player Sub-picture Overlay",
"Mixer/Video/Overlay/DVD",
"Parses the DVD Sub-Picture command stream and renders the SPU overlay "
"onto the video as it passes through",
"Jan Schmidt <jan@fluendo.com>");
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 (&video_sink_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&subpic_sink_factory));
gst_element_class_set_details (element_class, &element_details);
element_class->change_state = gst_dvd_spu_change_state;
}
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;
}
static void
gst_dvd_spu_init (GstDVDSpu * dvdspu, GstDVDSpuClass * gclass)
{
dvdspu->videosinkpad =
gst_pad_new_from_static_template (&video_sink_factory, "video");
gst_pad_set_setcaps_function (dvdspu->videosinkpad,
gst_dvd_spu_video_set_caps);
gst_pad_set_getcaps_function (dvdspu->videosinkpad,
gst_dvd_spu_video_proxy_getcaps);
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_bufferalloc_function (dvdspu->videosinkpad,
gst_dvd_spu_buffer_alloc);
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_getcaps_function (dvdspu->srcpad,
gst_dvd_spu_video_proxy_getcaps);
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_use_fixed_caps (dvdspu->subpic_sinkpad);
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);
dvdspu->spu_lock = g_mutex_new ();
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);
gst_buffer_replace (&dvdspu->ref_frame, NULL);
gst_buffer_replace (&dvdspu->pending_frame, NULL);
dvdspu->spu_state.fps_n = 25;
dvdspu->spu_state.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_free (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)
{
SpuPacket *packet;
SpuState *state = &dvdspu->spu_state;
GST_INFO_OBJECT (dvdspu, "Flushing SPU information");
gst_segment_init (&dvdspu->subp_seg, GST_FORMAT_UNDEFINED);
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);
if (packet->event)
gst_event_unref (packet->event);
g_free (packet);
packet = (SpuPacket *) g_queue_pop_head (dvdspu->pending_spus);
}
if (state->buf) {
gst_buffer_unref (state->buf);
state->buf = NULL;
}
if (state->pix_buf) {
gst_buffer_unref (state->pix_buf);
state->pix_buf = NULL;
}
state->base_ts = state->next_ts = GST_CLOCK_TIME_NONE;
state->flags &= ~(SPU_STATE_FLAGS_MASK);
state->pix_data[0] = 0;
state->pix_data[1] = 0;
state->hl_rect.top = -1;
state->hl_rect.bottom = -1;
state->disp_rect.top = -1;
state->disp_rect.bottom = -1;
state->n_line_ctrl_i = 0;
if (state->line_ctrl_i != NULL) {
g_free (state->line_ctrl_i);
state->line_ctrl_i = NULL;
}
}
/* Proxy buffer allocations on the video sink pad downstream */
static GstFlowReturn
gst_dvd_spu_buffer_alloc (GstPad * sinkpad, guint64 offset, guint size,
GstCaps * caps, GstBuffer ** buf)
{
GstDVDSpu *dvdspu = GST_DVD_SPU (gst_pad_get_parent (sinkpad));
GstFlowReturn ret = GST_FLOW_OK;
ret = gst_pad_alloc_buffer (dvdspu->srcpad, offset, size, caps, buf);
gst_object_unref (dvdspu);
return ret;
}
static gboolean
gst_dvd_spu_src_event (GstPad * pad, GstEvent * event)
{
GstDVDSpu *dvdspu = GST_DVD_SPU (gst_pad_get_parent (pad));
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);
}
gst_object_unref (dvdspu);
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;
GstStructure *s;
gint w, h;
gint i;
gint fps_n, fps_d;
SpuState *state;
s = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (s, "width", &w) ||
!gst_structure_get_int (s, "height", &h) ||
!gst_structure_get_fraction (s, "framerate", &fps_n, &fps_d)) {
goto done;
}
DVD_SPU_LOCK (dvdspu);
state = &dvdspu->spu_state;
state->fps_n = fps_n;
state->fps_d = fps_d;
state->vid_height = h;
state->Y_height = GST_ROUND_UP_2 (h);
state->UV_height = state->Y_height / 2;
if (state->vid_width != w) {
state->vid_width = w;
state->Y_stride = GST_ROUND_UP_4 (w);
state->UV_stride = GST_ROUND_UP_4 (state->Y_stride / 2);
for (i = 0; i < 3; i++) {
state->comp_bufs[i] = g_realloc (state->comp_bufs[i],
sizeof (guint16) * state->UV_stride);
}
}
DVD_SPU_UNLOCK (dvdspu);
res = TRUE;
done:
gst_object_unref (dvdspu);
return res;
}
static GstCaps *
gst_dvd_spu_video_proxy_getcaps (GstPad * pad)
{
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_get_caps (otherpad);
if (caps) {
GstCaps *temp;
const GstCaps *templ;
templ = gst_pad_get_pad_template_caps (otherpad);
temp = gst_caps_intersect (caps, templ);
gst_caps_unref (caps);
caps = temp;
} else {
caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
}
gst_object_unref (dvdspu);
return caps;
}
static gboolean
gst_dvd_spu_video_event (GstPad * pad, GstEvent * event)
{
GstDVDSpu *dvdspu = (GstDVDSpu *) (gst_object_get_parent (GST_OBJECT (pad)));
SpuState *state = &dvdspu->spu_state;
gboolean res = TRUE;
g_return_val_if_fail (dvdspu != NULL, FALSE);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CUSTOM_DOWNSTREAM:
case GST_EVENT_CUSTOM_DOWNSTREAM_OOB:
{
const GstStructure *structure = gst_event_get_structure (event);
const char *event_type;
if (structure == NULL) {
res = gst_pad_event_default (pad, event);
break;
}
if (!gst_structure_has_name (structure, "application/x-gst-dvd")) {
res = gst_pad_event_default (pad, event);
break;
}
event_type = gst_structure_get_string (structure, "event");
if (event_type == NULL) {
res = gst_pad_event_default (pad, event);
break;
}
if (strcmp (event_type, "dvd-still") == 0) {
gboolean in_still;
if (gst_structure_get_boolean (structure, "still-state", &in_still)) {
GstBuffer *to_push = NULL;
GST_DEBUG_OBJECT (dvdspu,
"DVD event of type %s on video pad: in-still = %d", event_type,
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);
}
gst_event_unref (event);
res = TRUE;
} else {
GST_DEBUG_OBJECT (dvdspu,
"DVD event of type %s on video pad", event_type);
res = gst_pad_event_default (pad, event);
}
break;
}
case GST_EVENT_NEWSEGMENT:
{
gboolean update;
gdouble rate, arate;
GstFormat format;
gint64 start, stop, time;
gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
&start, &stop, &time);
if (format != GST_FORMAT_TIME)
return FALSE;
/* Only print updates if they have an end time (don't print start_time
* updates */
GST_DEBUG_OBJECT (dvdspu, "video pad NewSegment:"
" Update %d, rate %g arate %g format %d start %" GST_TIME_FORMAT
" %" GST_TIME_FORMAT " position %" GST_TIME_FORMAT,
update, rate, arate, format, GST_TIME_ARGS (start),
GST_TIME_ARGS (stop), GST_TIME_ARGS (time));
DVD_SPU_LOCK (dvdspu);
if (update && start > dvdspu->video_seg.last_stop) {
#if 0
g_print ("Segment update for video. Advancing from %" GST_TIME_FORMAT
" to %" GST_TIME_FORMAT "\n",
GST_TIME_ARGS (dvdspu->video_seg.last_stop), GST_TIME_ARGS (start));
#endif
while (dvdspu->video_seg.last_stop < start &&
!(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);
}
}
gst_segment_set_newsegment_full (&dvdspu->video_seg, update, rate, arate,
format, start, stop, time);
DVD_SPU_UNLOCK (dvdspu);
res = gst_pad_event_default (pad, event);
break;
}
case GST_EVENT_FLUSH_START:
res = gst_pad_event_default (pad, event);
goto done;
case GST_EVENT_FLUSH_STOP:
res = gst_pad_event_default (pad, 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, event);
break;
}
done:
gst_object_unref (dvdspu);
return res;
#if 0
error:
gst_event_unref (event);
return FALSE;
#endif
}
static GstFlowReturn
gst_dvd_spu_video_chain (GstPad * pad, GstBuffer * buf)
{
GstDVDSpu *dvdspu = (GstDVDSpu *) (gst_object_get_parent (GST_OBJECT (pad)));
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);
gst_object_unref (dvdspu);
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.last_stop;
next_ts += gst_util_uint64_scale_int (GST_SECOND,
dvdspu->spu_state.fps_d, dvdspu->spu_state.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) {
gst_segment_set_last_stop (&dvdspu->video_seg, GST_FORMAT_TIME, 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)) {
gst_segment_set_last_stop (&dvdspu->video_seg, GST_FORMAT_TIME,
GST_BUFFER_TIMESTAMP (buf));
}
new_ts = gst_segment_to_running_time (&dvdspu->video_seg, GST_FORMAT_TIME,
dvdspu->video_seg.last_stop);
#if 0
g_print ("TS %" GST_TIME_FORMAT " running: %" GST_TIME_FORMAT "\n",
GST_TIME_ARGS (dvdspu->video_seg.last_stop), 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);
gst_dvd_spu_render_spu (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;
}
/* 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 */
gst_dvd_spu_render_spu (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_metadata_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_parse_chg_colcon (GstDVDSpu * dvdspu, guint8 * data, guint8 * end)
{
SpuState *state = &dvdspu->spu_state;
guint8 *cur;
gint16 n_entries;
gint16 i;
/* Clear any existing chg colcon info */
state->n_line_ctrl_i = 0;
if (state->line_ctrl_i != NULL) {
g_free (state->line_ctrl_i);
state->line_ctrl_i = NULL;
}
GST_DEBUG_OBJECT (dvdspu, "Change Color & Contrast. Pixel data = %d bytes",
(gint16) (end - data));
/* Count the number of entries we'll need */
n_entries = 0;
for (cur = data; cur < end;) {
guint8 n_changes;
guint32 code;
if (cur + 4 > end)
break;
code = GST_READ_UINT32_BE (cur);
if (code == 0x0fffffff)
break; /* Termination code */
n_changes = CLAMP ((cur[2] >> 4), 1, 8);
cur += 4 + (6 * n_changes);
if (cur > end)
break; /* Invalid entry overrunning buffer */
n_entries++;
}
state->n_line_ctrl_i = n_entries;
state->line_ctrl_i = g_new (SpuLineCtrlI, n_entries);
cur = data;
for (i = 0; i < n_entries; i++) {
SpuLineCtrlI *cur_line_ctrl = state->line_ctrl_i + i;
guint8 n_changes = CLAMP ((cur[2] >> 4), 1, 8);
guint8 c;
cur_line_ctrl->n_changes = n_changes;
cur_line_ctrl->top = ((cur[0] << 8) & 0x300) | cur[1];
cur_line_ctrl->bottom = ((cur[2] << 8) & 0x300) | cur[3];
GST_LOG_OBJECT (dvdspu, "ChgColcon Entry %d Top: %d Bottom: %d Changes: %d",
i, cur_line_ctrl->top, cur_line_ctrl->bottom, n_changes);
cur += 4;
for (c = 0; c < n_changes; c++) {
SpuPixCtrlI *cur_pix_ctrl = cur_line_ctrl->pix_ctrl_i + c;
cur_pix_ctrl->left = ((cur[0] << 8) & 0x300) | cur[1];
cur_pix_ctrl->palette = GST_READ_UINT32_BE (cur + 2);
GST_LOG_OBJECT (dvdspu, " %d: left: %d palette 0x%x", c,
cur_pix_ctrl->left, cur_pix_ctrl->palette);
cur += 6;
}
}
}
static void
gst_dvd_spu_exec_cmd_blk (GstDVDSpu * dvdspu, guint8 * data, guint8 * end)
{
SpuState *state = &dvdspu->spu_state;
while (data < end) {
guint8 cmd;
cmd = data[0];
switch (cmd) {
case SPU_CMD_FSTA_DSP:
GST_DEBUG_OBJECT (dvdspu, " Forced Display");
state->flags |= SPU_STATE_FORCED_DSP;
data += 1;
break;
case SPU_CMD_DSP:
GST_DEBUG_OBJECT (dvdspu, " Display On");
state->flags |= SPU_STATE_DISPLAY;
data += 1;
break;
case SPU_CMD_STP_DSP:
GST_DEBUG_OBJECT (dvdspu, " Display Off");
state->flags &= ~(SPU_STATE_FORCED_DSP | SPU_STATE_DISPLAY);
data += 1;
break;
case SPU_CMD_SET_COLOR:{
if (G_UNLIKELY (data + 3 >= end))
return; /* Invalid SET_COLOR cmd at the end of the blk */
state->main_idx[3] = data[1] >> 4;
state->main_idx[2] = data[1] & 0x0f;
state->main_idx[1] = data[2] >> 4;
state->main_idx[0] = data[2] & 0x0f;
state->main_pal_dirty = TRUE;
GST_DEBUG_OBJECT (dvdspu,
" Set Color bg %u pattern %u emph-1 %u emph-2 %u",
state->main_idx[0], state->main_idx[1], state->main_idx[2],
state->main_idx[3]);
data += 3;
break;
}
case SPU_CMD_SET_ALPHA:{
if (G_UNLIKELY (data + 3 >= end))
return; /* Invalid SET_ALPHA cmd at the end of the blk */
state->main_alpha[3] = data[1] >> 4;
state->main_alpha[2] = data[1] & 0x0f;
state->main_alpha[1] = data[2] >> 4;
state->main_alpha[0] = data[2] & 0x0f;
state->main_pal_dirty = TRUE;
GST_DEBUG_OBJECT (dvdspu,
" Set Alpha bg %u pattern %u emph-1 %u emph-2 %u",
state->main_alpha[0], state->main_alpha[1], state->main_alpha[2],
state->main_alpha[3]);
data += 3;
break;
}
case SPU_CMD_SET_DAREA:{
SpuRect *r = &state->disp_rect;
if (G_UNLIKELY (data + 7 >= end))
return; /* Invalid SET_DAREA cmd at the end of the blk */
r->top = ((data[4] & 0x3f) << 4) | ((data[5] & 0xe0) >> 4);
r->left = ((data[1] & 0x3f) << 4) | ((data[2] & 0xf0) >> 4);
r->right = ((data[2] & 0x03) << 8) | data[3];
r->bottom = ((data[5] & 0x03) << 8) | data[6];
GST_DEBUG_OBJECT (dvdspu,
" Set Display Area top %u left %u bottom %u right %u", r->top,
r->left, r->bottom, r->right);
data += 7;
break;
}
case SPU_CMD_DSPXA:{
if (G_UNLIKELY (data + 5 >= end))
return; /* Invalid SET_DSPXE cmd at the end of the blk */
state->pix_data[0] = GST_READ_UINT16_BE (data + 1);
state->pix_data[1] = GST_READ_UINT16_BE (data + 3);
/* Store a reference to the current command buffer, as that's where
* we'll need to take our pixel data from */
gst_buffer_replace (&state->pix_buf, state->buf);
GST_DEBUG_OBJECT (dvdspu, " Set Pixel Data Offsets top: %u bot: %u",
state->pix_data[0], state->pix_data[1]);
data += 5;
break;
}
case SPU_CMD_CHG_COLCON:{
guint16 field_size;
GST_DEBUG_OBJECT (dvdspu, " Set Color & Contrast Change");
if (G_UNLIKELY (data + 3 >= end))
return; /* Invalid CHG_COLCON cmd at the end of the blk */
data++;
field_size = GST_READ_UINT16_BE (data);
if (G_UNLIKELY (data + field_size >= end))
return; /* Invalid CHG_COLCON cmd at the end of the blk */
gst_dvd_spu_parse_chg_colcon (dvdspu, data + 2, data + field_size);
state->line_ctrl_i_pal_dirty = TRUE;
data += field_size;
break;
}
case SPU_CMD_END:
default:
GST_DEBUG_OBJECT (dvdspu, " END");
data = end;
break;
}
}
}
static void
gst_dvd_spu_finish_spu_buf (GstDVDSpu * dvdspu)
{
SpuState *state = &dvdspu->spu_state;
state->next_ts = state->base_ts = GST_CLOCK_TIME_NONE;
gst_buffer_replace (&state->buf, NULL);
GST_DEBUG_OBJECT (dvdspu, "Finished SPU buffer");
}
static gboolean
gst_dvd_spu_setup_cmd_blk (GstDVDSpu * dvdspu, guint16 cmd_blk_offset,
guint8 * start, guint8 * end)
{
SpuState *state = &dvdspu->spu_state;
guint16 delay;
guint8 *cmd_blk = start + cmd_blk_offset;
if (G_UNLIKELY (cmd_blk + 5 >= end))
return FALSE; /* No valid command block to read */
delay = GST_READ_UINT16_BE (cmd_blk);
state->next_ts = state->base_ts + STM_TO_GST (delay);
state->cur_cmd_blk = cmd_blk_offset;
GST_DEBUG_OBJECT (dvdspu, "Setup CMD Block @ %u with TS %" GST_TIME_FORMAT,
state->cur_cmd_blk, GST_TIME_ARGS (state->next_ts));
return TRUE;
}
static void
gst_dvd_spu_handle_new_spu_buf (GstDVDSpu * dvdspu, SpuPacket * packet)
{
guint8 *start, *end;
SpuState *state = &dvdspu->spu_state;
if (G_UNLIKELY (GST_BUFFER_SIZE (packet->buf) < 4))
goto invalid;
if (state->buf != NULL) {
gst_buffer_unref (state->buf);
state->buf = NULL;
}
state->buf = packet->buf;
state->base_ts = packet->event_ts;
start = GST_BUFFER_DATA (state->buf);
end = start + GST_BUFFER_SIZE (state->buf);
/* Configure the first command block in this buffer as our initial blk */
state->cur_cmd_blk = GST_READ_UINT16_BE (start + 2);
gst_dvd_spu_setup_cmd_blk (dvdspu, state->cur_cmd_blk, start, end);
/* Clear existing chg-colcon info */
state->n_line_ctrl_i = 0;
if (state->line_ctrl_i != NULL) {
g_free (state->line_ctrl_i);
state->line_ctrl_i = NULL;
}
return;
invalid:
/* Invalid buffer */
gst_dvd_spu_finish_spu_buf (dvdspu);
}
static void
gst_dvd_spu_handle_dvd_event (GstDVDSpu * dvdspu, GstEvent * event)
{
const gchar *event_type;
const GstStructure *structure = gst_event_get_structure (event);
SpuState *state = &dvdspu->spu_state;
gboolean hl_change = FALSE;
event_type = gst_structure_get_string (structure, "event");
GST_INFO_OBJECT (dvdspu, "DVD event of type %s on subp pad OOB=%d",
event_type, (GST_EVENT_TYPE (event) == GST_EVENT_CUSTOM_DOWNSTREAM_OOB));
if (strcmp (event_type, "dvd-spu-clut-change") == 0) {
gchar prop_name[32];
gint i;
gint entry;
for (i = 0; i < 16; i++) {
g_snprintf (prop_name, 32, "clut%02d", i);
if (!gst_structure_get_int (structure, prop_name, &entry))
entry = 0;
state->current_clut[i] = (guint32) entry;
}
state->main_pal_dirty = TRUE;
state->hl_pal_dirty = TRUE;
state->line_ctrl_i_pal_dirty = TRUE;
hl_change = TRUE;
} else if (strcmp (event_type, "dvd-spu-highlight") == 0) {
gint val;
if (gst_structure_get_int (structure, "palette", &val)) {
state->hl_idx[3] = ((guint32) (val) >> 28) & 0x0f;
state->hl_idx[2] = ((guint32) (val) >> 24) & 0x0f;
state->hl_idx[1] = ((guint32) (val) >> 20) & 0x0f;
state->hl_idx[0] = ((guint32) (val) >> 16) & 0x0f;
state->hl_alpha[3] = ((guint32) (val) >> 12) & 0x0f;
state->hl_alpha[2] = ((guint32) (val) >> 8) & 0x0f;
state->hl_alpha[1] = ((guint32) (val) >> 4) & 0x0f;
state->hl_alpha[0] = ((guint32) (val) >> 0) & 0x0f;
state->hl_pal_dirty = TRUE;
}
if (gst_structure_get_int (structure, "sx", &val))
state->hl_rect.left = (gint16) val;
if (gst_structure_get_int (structure, "sy", &val))
state->hl_rect.top = (gint16) val;
if (gst_structure_get_int (structure, "ex", &val))
state->hl_rect.right = (gint16) val;
if (gst_structure_get_int (structure, "ey", &val))
state->hl_rect.bottom = (gint16) val;
GST_INFO_OBJECT (dvdspu, "Highlight rect is now (%d,%d) to (%d,%d)",
state->hl_rect.left, state->hl_rect.top,
state->hl_rect.right, state->hl_rect.bottom);
hl_change = TRUE;
} else if (strcmp (event_type, "dvd-spu-reset-highlight") == 0) {
if (state->hl_rect.top != -1 || state->hl_rect.bottom != -1)
hl_change = TRUE;
state->hl_rect.top = -1;
state->hl_rect.bottom = -1;
GST_INFO_OBJECT (dvdspu, "Highlight off");
} else if (strcmp (event_type, "dvd-set-subpicture-track") == 0) {
gboolean forced_only;
if (gst_structure_get_boolean (structure, "forced-only", &forced_only)) {
gboolean was_forced = (state->flags & SPU_STATE_FORCED_ONLY);
if (forced_only)
state->flags |= SPU_STATE_FORCED_ONLY;
else
state->flags &= ~(SPU_STATE_FORCED_ONLY);
if ((was_forced && !forced_only) || (!was_forced && forced_only))
hl_change = TRUE;
}
}
if (hl_change && (state->flags & SPU_STATE_STILL_FRAME)) {
gst_dvd_spu_redraw_still (dvdspu, FALSE);
}
gst_event_unref (event);
}
#if DUMP_DCSQ
static void
gst_dvd_spu_dump_dcsq (GstDVDSpu * dvdspu,
GstClockTime start_ts, GstBuffer * spu_buf)
{
guint16 cmd_blk_offset;
guint16 next_blk;
guint8 *start, *end;
start = GST_BUFFER_DATA (spu_buf);
end = start + GST_BUFFER_SIZE (spu_buf);
g_return_if_fail (start != NULL);
/* First command */
next_blk = GST_READ_UINT16_BE (start + 2);
cmd_blk_offset = 0;
/* Loop through all commands */
g_print ("SPU begins @ %" GST_TIME_FORMAT " offset %u\n",
GST_TIME_ARGS (start_ts), next_blk);
while (cmd_blk_offset != next_blk) {
guint8 *data;
GstClockTime cmd_blk_ts;
cmd_blk_offset = next_blk;
if (G_UNLIKELY (start + cmd_blk_offset + 5 >= end))
break; /* No valid command to read */
data = start + cmd_blk_offset;
cmd_blk_ts = start_ts + STM_TO_GST (GST_READ_UINT16_BE (data));
next_blk = GST_READ_UINT16_BE (data + 2);
g_print ("Cmd Blk @ offset %u next %u ts %" GST_TIME_FORMAT "\n",
cmd_blk_offset, next_blk, GST_TIME_ARGS (cmd_blk_ts));
data += 4;
gst_dvd_spu_exec_cmd_blk (dvdspu, data, end);
}
}
#endif
/* 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;
while (state->next_ts == GST_CLOCK_TIME_NONE || state->next_ts <= new_ts) {
guint8 *start, *cmd_blk, *end;
guint16 next_blk;
if (state->buf == NULL) {
GstClockTime vid_run_ts;
/* 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 */
vid_run_ts =
gst_segment_to_running_time (&dvdspu->video_seg, GST_FORMAT_TIME,
dvdspu->video_seg.last_stop);
GST_LOG_OBJECT (dvdspu,
"Popped new SPU packet with TS %" GST_TIME_FORMAT
". Video last_stop=%" GST_TIME_FORMAT " (%" GST_TIME_FORMAT
") type %s",
GST_TIME_ARGS (packet->event_ts), GST_TIME_ARGS (vid_run_ts),
GST_TIME_ARGS (dvdspu->video_seg.last_stop),
packet->buf ? "buffer" : "event");
if (packet->buf) {
#if DUMP_DCSQ
gst_dvd_spu_dump_dcsq (dvdspu, packet->event_ts, packet->buf);
#endif
gst_dvd_spu_handle_new_spu_buf (dvdspu, packet);
}
if (packet->event)
gst_dvd_spu_handle_dvd_event (dvdspu, packet->event);
g_free (packet);
continue;
}
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 we get here, we have an SPU buffer, and it's time to process the
* next cmd */
g_assert (state->buf != NULL);
GST_DEBUG_OBJECT (dvdspu, "Executing cmd blk with TS %" GST_TIME_FORMAT
" @ offset %u", GST_TIME_ARGS (state->next_ts), state->cur_cmd_blk);
start = GST_BUFFER_DATA (state->buf);
end = start + GST_BUFFER_SIZE (state->buf);
cmd_blk = start + state->cur_cmd_blk;
if (G_UNLIKELY (cmd_blk + 5 >= end)) {
/* Invalid. Finish the buffer and loop again */
gst_dvd_spu_finish_spu_buf (dvdspu);
continue;
}
gst_dvd_spu_exec_cmd_blk (dvdspu, cmd_blk + 4, end);
next_blk = GST_READ_UINT16_BE (cmd_blk + 2);
if (next_blk != state->cur_cmd_blk) {
/* Advance to the next block of commands */
gst_dvd_spu_setup_cmd_blk (dvdspu, next_blk, start, end);
} else {
/* Next Block points to the current block, so we're finished with this
* SPU buffer */
gst_dvd_spu_finish_spu_buf (dvdspu);
}
}
}
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) {
vid_ts = gst_segment_to_running_time (&dvdspu->video_seg,
GST_FORMAT_TIME, dvdspu->video_seg.last_stop);
sub_ts = gst_segment_to_running_time (&dvdspu->subp_seg,
GST_FORMAT_TIME, dvdspu->subp_seg.last_stop);
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 GstFlowReturn
gst_dvd_spu_subpic_chain (GstPad * pad, GstBuffer * buf)
{
GstDVDSpu *dvdspu = (GstDVDSpu *) (gst_object_get_parent (GST_OBJECT (pad)));
g_return_val_if_fail (dvdspu != NULL, GST_FLOW_ERROR);
GST_INFO_OBJECT (dvdspu, "Have subpicture buffer with timestamp %"
GST_TIME_FORMAT " and size %u",
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), GST_BUFFER_SIZE (buf));
DVD_SPU_LOCK (dvdspu);
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
gst_segment_set_last_stop (&dvdspu->subp_seg, GST_FORMAT_TIME,
GST_BUFFER_TIMESTAMP (buf));
}
if (dvdspu->partial_spu != NULL) {
dvdspu->partial_spu = gst_buffer_join (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 && GST_BUFFER_SIZE (dvdspu->partial_spu) > 4) {
guint16 packet_size;
guint8 *data;
data = GST_BUFFER_DATA (dvdspu->partial_spu);
packet_size = GST_READ_UINT16_BE (data);
if (packet_size == GST_BUFFER_SIZE (dvdspu->partial_spu)) {
SpuPacket *spu_packet;
GstClockTime ts;
GstClockTime run_ts = GST_CLOCK_TIME_NONE;
GST_DEBUG_OBJECT (dvdspu,
"Complete subpicture buffer of %u bytes with TS %" GST_TIME_FORMAT,
GST_BUFFER_SIZE (dvdspu->partial_spu),
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (dvdspu->partial_spu)));
/* Decide whether to pass this buffer through to the rendering code */
ts = GST_BUFFER_TIMESTAMP (dvdspu->partial_spu);
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 = dvdspu->partial_spu;
/* Store the activation time of this buffer in running time */
spu_packet->event_ts =
gst_segment_to_running_time (&dvdspu->subp_seg, GST_FORMAT_TIME,
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);
dvdspu->partial_spu = NULL;
/* 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 (dvdspu->partial_spu);
dvdspu->partial_spu = NULL;
}
} else if (packet_size < GST_BUFFER_SIZE (dvdspu->partial_spu)) {
/* 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 %u",
GST_BUFFER_SIZE (dvdspu->partial_spu));
gst_buffer_unref (dvdspu->partial_spu);
dvdspu->partial_spu = NULL;
}
}
DVD_SPU_UNLOCK (dvdspu);
gst_object_unref (dvdspu);
return GST_FLOW_OK;
}
static gboolean
gst_dvd_spu_subpic_event (GstPad * pad, GstEvent * event)
{
GstDVDSpu *dvdspu = (GstDVDSpu *) (gst_object_get_parent (GST_OBJECT (pad)));
gboolean res = TRUE;
g_return_val_if_fail (dvdspu != NULL, FALSE);
/* Some events on the subpicture sink pad just get ignored, like
* FLUSH_START */
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CUSTOM_DOWNSTREAM:
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, event);
break;
}
DVD_SPU_LOCK (dvdspu);
if (GST_EVENT_IS_SERIALIZED (event)) {
SpuPacket *spu_packet = g_new0 (SpuPacket, 1);
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_NEWSEGMENT:
{
gboolean update;
gdouble rate;
GstFormat format;
gint64 start, stop, time;
gdouble arate;
gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
&start, &stop, &time);
/* Only print updates if they have an end time (don't print start_time
* updates */
GST_DEBUG_OBJECT (dvdspu, "subpic pad NewSegment:"
" Update %d, rate %g arate %g format %d start %" GST_TIME_FORMAT
" %" GST_TIME_FORMAT " position %" GST_TIME_FORMAT,
update, rate, arate, format, GST_TIME_ARGS (start),
GST_TIME_ARGS (stop), GST_TIME_ARGS (time));
DVD_SPU_LOCK (dvdspu);
gst_segment_set_newsegment_full (&dvdspu->subp_seg, update, rate, arate,
format, start, stop, time);
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:
DVD_SPU_LOCK (dvdspu);
gst_dvd_spu_flush_spu_info (dvdspu);
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;
break;
default:
res = gst_pad_event_default (pad, event);
break;
}
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 = 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;
}
gboolean
gst_dvd_spu_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (dvdspu_debug, "gstdvdspu",
0, "DVD Sub-picture Overlay decoder/renderer");
return gst_element_register (plugin, "dvdspu",
GST_RANK_NONE, 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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