static gboolean
gst_app_src_query (GstBaseSrc * src, GstQuery * query)
{
GstAppSrc *appsrc = GST_APP_SRC_CAST (src);
GstAppSrcPrivate *priv = appsrc->priv;
gboolean res;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
GstClockTime min, max;
gboolean live;
/* Query the parent class for the defaults */
res = gst_base_src_query_latency (src, &live, &min, &max);
/* overwrite with our values when we need to */
g_mutex_lock (priv->mutex);
if (priv->min_latency != -1)
min = priv->min_latency;
if (priv->max_latency != -1)
max = priv->max_latency;
g_mutex_unlock (priv->mutex);
gst_query_set_latency (query, live, min, max);
break;
}
default:
res = GST_BASE_SRC_CLASS (parent_class)->query (src, query);
break;
}
return res;
}
static void
gst_app_src_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstAppSrc *appsrc = GST_APP_SRC_CAST (object);
GstAppSrcPrivate *priv = appsrc->priv;
switch (prop_id) {
case PROP_CAPS:
g_value_take_boxed (value, gst_app_src_get_caps (appsrc));
break;
case PROP_SIZE:
g_value_set_int64 (value, gst_app_src_get_size (appsrc));
break;
case PROP_STREAM_TYPE:
g_value_set_enum (value, gst_app_src_get_stream_type (appsrc));
break;
case PROP_MAX_BYTES:
g_value_set_uint64 (value, gst_app_src_get_max_bytes (appsrc));
break;
case PROP_FORMAT:
g_value_set_enum (value, priv->format);
break;
case PROP_BLOCK:
g_value_set_boolean (value, priv->block);
break;
case PROP_IS_LIVE:
g_value_set_boolean (value, gst_base_src_is_live (GST_BASE_SRC (appsrc)));
break;
case PROP_MIN_LATENCY:
{
guint64 min;
gst_app_src_get_latency (appsrc, &min, NULL);
g_value_set_int64 (value, min);
break;
}
case PROP_MAX_LATENCY:
{
guint64 max;
gst_app_src_get_latency (appsrc, NULL, &max);
g_value_set_int64 (value, max);
break;
}
case PROP_EMIT_SIGNALS:
g_value_set_boolean (value, gst_app_src_get_emit_signals (appsrc));
break;
case PROP_MIN_PERCENT:
g_value_set_uint (value, priv->min_percent);
break;
case PROP_CURRENT_LEVEL_BYTES:
g_value_set_uint64 (value, gst_app_src_get_current_level_bytes (appsrc));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_app_src_do_get_size (GstBaseSrc * src, guint64 * size)
{
GstAppSrc *appsrc = GST_APP_SRC_CAST (src);
*size = gst_app_src_get_size (appsrc);
return TRUE;
}
static void
gst_app_src_finalize (GObject * obj)
{
GstAppSrc *appsrc = GST_APP_SRC_CAST (obj);
GstAppSrcPrivate *priv = appsrc->priv;
g_mutex_free (priv->mutex);
g_cond_free (priv->cond);
g_queue_free (priv->queue);
G_OBJECT_CLASS (parent_class)->finalize (obj);
}
static gboolean
gst_app_src_negotiate (GstBaseSrc * basesrc)
{
GstAppSrc *appsrc = GST_APP_SRC_CAST (basesrc);
GstAppSrcPrivate *priv = appsrc->priv;
gboolean result;
g_mutex_lock (&priv->mutex);
result = gst_app_src_do_negotiate (basesrc);
priv->new_caps = FALSE;
g_mutex_unlock (&priv->mutex);
return result;
}
static gboolean
gst_app_src_query (GstBaseSrc * src, GstQuery * query)
{
GstAppSrc *appsrc = GST_APP_SRC_CAST (src);
GstAppSrcPrivate *priv = appsrc->priv;
gboolean res;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
GstClockTime min, max;
gboolean live;
/* Query the parent class for the defaults */
res = gst_base_src_query_latency (src, &live, &min, &max);
/* overwrite with our values when we need to */
g_mutex_lock (&priv->mutex);
if (priv->min_latency != -1)
min = priv->min_latency;
if (priv->max_latency != -1)
max = priv->max_latency;
g_mutex_unlock (&priv->mutex);
gst_query_set_latency (query, live, min, max);
break;
}
case GST_QUERY_SCHEDULING:
{
gst_query_set_scheduling (query, GST_SCHEDULING_FLAG_SEEKABLE, 1, -1, 0);
gst_query_add_scheduling_mode (query, GST_PAD_MODE_PUSH);
switch (priv->stream_type) {
case GST_APP_STREAM_TYPE_STREAM:
case GST_APP_STREAM_TYPE_SEEKABLE:
break;
case GST_APP_STREAM_TYPE_RANDOM_ACCESS:
gst_query_add_scheduling_mode (query, GST_PAD_MODE_PULL);
break;
}
res = TRUE;
break;
}
default:
res = GST_BASE_SRC_CLASS (parent_class)->query (src, query);
break;
}
return res;
}
static gboolean
gst_app_src_unlock_stop (GstBaseSrc * bsrc)
{
GstAppSrc *appsrc = GST_APP_SRC_CAST (bsrc);
GstAppSrcPrivate *priv = appsrc->priv;
g_mutex_lock (&priv->mutex);
GST_DEBUG_OBJECT (appsrc, "unlock stop");
priv->flushing = FALSE;
g_cond_broadcast (&priv->cond);
g_mutex_unlock (&priv->mutex);
return TRUE;
}
static void
gst_app_src_dispose (GObject * obj)
{
GstAppSrc *appsrc = GST_APP_SRC_CAST (obj);
GstAppSrcPrivate *priv = appsrc->priv;
if (priv->caps) {
gst_caps_unref (priv->caps);
priv->caps = NULL;
}
gst_app_src_flush_queued (appsrc);
G_OBJECT_CLASS (parent_class)->dispose (obj);
}
static void
gst_app_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAppSrc *appsrc = GST_APP_SRC_CAST (object);
GstAppSrcPrivate *priv = appsrc->priv;
switch (prop_id) {
case PROP_CAPS:
gst_app_src_set_caps (appsrc, gst_value_get_caps (value));
break;
case PROP_SIZE:
gst_app_src_set_size (appsrc, g_value_get_int64 (value));
break;
case PROP_STREAM_TYPE:
gst_app_src_set_stream_type (appsrc, g_value_get_enum (value));
break;
case PROP_MAX_BYTES:
gst_app_src_set_max_bytes (appsrc, g_value_get_uint64 (value));
break;
case PROP_FORMAT:
priv->format = g_value_get_enum (value);
break;
case PROP_BLOCK:
priv->block = g_value_get_boolean (value);
break;
case PROP_IS_LIVE:
gst_base_src_set_live (GST_BASE_SRC (appsrc),
g_value_get_boolean (value));
break;
case PROP_MIN_LATENCY:
gst_app_src_set_latencies (appsrc, TRUE, g_value_get_int64 (value),
FALSE, -1);
break;
case PROP_MAX_LATENCY:
gst_app_src_set_latencies (appsrc, FALSE, -1, TRUE,
g_value_get_int64 (value));
break;
case PROP_EMIT_SIGNALS:
gst_app_src_set_emit_signals (appsrc, g_value_get_boolean (value));
break;
case PROP_MIN_PERCENT:
priv->min_percent = g_value_get_uint (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_app_src_stop (GstBaseSrc * bsrc)
{
GstAppSrc *appsrc = GST_APP_SRC_CAST (bsrc);
GstAppSrcPrivate *priv = appsrc->priv;
g_mutex_lock (priv->mutex);
GST_DEBUG_OBJECT (appsrc, "stopping");
priv->is_eos = FALSE;
priv->flushing = TRUE;
priv->started = FALSE;
gst_app_src_flush_queued (appsrc);
g_mutex_unlock (priv->mutex);
return TRUE;
}
static gboolean
gst_app_src_is_seekable (GstBaseSrc * src)
{
GstAppSrc *appsrc = GST_APP_SRC_CAST (src);
GstAppSrcPrivate *priv = appsrc->priv;
gboolean res = FALSE;
switch (priv->stream_type) {
case GST_APP_STREAM_TYPE_STREAM:
break;
case GST_APP_STREAM_TYPE_SEEKABLE:
case GST_APP_STREAM_TYPE_RANDOM_ACCESS:
res = TRUE;
break;
}
return res;
}
static gboolean
gst_app_src_start (GstBaseSrc * bsrc)
{
GstAppSrc *appsrc = GST_APP_SRC_CAST (bsrc);
GstAppSrcPrivate *priv = appsrc->priv;
g_mutex_lock (priv->mutex);
GST_DEBUG_OBJECT (appsrc, "starting");
priv->started = TRUE;
/* set the offset to -1 so that we always do a first seek. This is only used
* in random-access mode. */
priv->offset = -1;
priv->flushing = FALSE;
g_mutex_unlock (priv->mutex);
gst_base_src_set_format (bsrc, priv->format);
return TRUE;
}
/* will be called in push mode */
static gboolean
gst_app_src_do_seek (GstBaseSrc * src, GstSegment * segment)
{
GstAppSrc *appsrc = GST_APP_SRC_CAST (src);
GstAppSrcPrivate *priv = appsrc->priv;
gint64 desired_position;
gboolean res = FALSE;
desired_position = segment->position;
GST_DEBUG_OBJECT (appsrc, "seeking to %" G_GINT64_FORMAT ", format %s",
desired_position, gst_format_get_name (segment->format));
/* no need to try to seek in streaming mode */
if (priv->stream_type == GST_APP_STREAM_TYPE_STREAM)
return TRUE;
if (priv->callbacks.seek_data)
res = priv->callbacks.seek_data (appsrc, desired_position, priv->user_data);
else {
gboolean emit;
g_mutex_lock (&priv->mutex);
emit = priv->emit_signals;
g_mutex_unlock (&priv->mutex);
if (emit)
g_signal_emit (appsrc, gst_app_src_signals[SIGNAL_SEEK_DATA], 0,
desired_position, &res);
}
if (res) {
GST_DEBUG_OBJECT (appsrc, "flushing queue");
gst_app_src_flush_queued (appsrc);
priv->is_eos = FALSE;
} else {
GST_WARNING_OBJECT (appsrc, "seek failed");
}
return res;
}
static gboolean
gst_app_src_do_negotiate (GstBaseSrc * basesrc)
{
GstAppSrc *appsrc = GST_APP_SRC_CAST (basesrc);
GstAppSrcPrivate *priv = appsrc->priv;
gboolean result;
GstCaps *caps;
GST_OBJECT_LOCK (basesrc);
caps = priv->caps ? gst_caps_ref (priv->caps) : NULL;
GST_OBJECT_UNLOCK (basesrc);
if (caps) {
result = gst_base_src_set_caps (basesrc, caps);
gst_caps_unref (caps);
} else {
result = GST_BASE_SRC_CLASS (parent_class)->negotiate (basesrc);
}
return result;
}
/* Decode */
static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
{
block_t *p_block;
picture_t *p_pic = NULL;
decoder_sys_t *p_sys = p_dec->p_sys;
GstMessage *p_msg;
GstBuffer *p_buf;
if( !pp_block )
return NULL;
p_block = *pp_block;
if( !p_block )
goto check_messages;
if( unlikely( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY |
BLOCK_FLAG_CORRUPTED ) ) )
{
if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
Flush( p_dec );
if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
{
block_Release( p_block );
goto done;
}
}
if( likely( p_block->i_buffer ) )
{
p_buf = gst_buffer_new_wrapped_full( GST_MEMORY_FLAG_READONLY,
p_block->p_start, p_block->i_size,
p_block->p_buffer - p_block->p_start, p_block->i_buffer,
p_block, ( GDestroyNotify )block_Release );
if( unlikely( p_buf == NULL ) )
{
msg_Err( p_dec, "failed to create input gstbuffer" );
p_dec->b_error = true;
block_Release( p_block );
goto done;
}
if( p_block->i_dts > VLC_TS_INVALID )
GST_BUFFER_DTS( p_buf ) = gst_util_uint64_scale( p_block->i_dts,
GST_SECOND, GST_MSECOND );
if( p_block->i_pts <= VLC_TS_INVALID )
GST_BUFFER_PTS( p_buf ) = GST_BUFFER_DTS( p_buf );
else
GST_BUFFER_PTS( p_buf ) = gst_util_uint64_scale( p_block->i_pts,
GST_SECOND, GST_MSECOND );
if( p_block->i_length > VLC_TS_INVALID )
GST_BUFFER_DURATION( p_buf ) = gst_util_uint64_scale(
p_block->i_length, GST_SECOND, GST_MSECOND );
if( p_dec->fmt_in.video.i_frame_rate &&
p_dec->fmt_in.video.i_frame_rate_base )
GST_BUFFER_DURATION( p_buf ) = gst_util_uint64_scale( GST_SECOND,
p_dec->fmt_in.video.i_frame_rate_base,
p_dec->fmt_in.video.i_frame_rate );
/* Give the input buffer to GStreamer Bin.
*
* libvlc libvlc
* \ (i/p) (o/p) ^
* \ /
* ___v____GSTREAMER BIN_____/____
* | |
* | appsrc-->decode-->vlcsink |
* |_______________________________|
*
* * * * * * * * * * * * * * * * * * * * */
if( unlikely( gst_app_src_push_buffer(
GST_APP_SRC_CAST( p_sys->p_decode_src ), p_buf )
!= GST_FLOW_OK ) )
{
/* block will be released internally,
* when gst_buffer_unref() is called */
p_dec->b_error = true;
msg_Err( p_dec, "failed to push buffer" );
goto done;
}
}
else
block_Release( p_block );
check_messages:
/* Poll for any messages, errors */
p_msg = gst_bus_pop_filtered( p_sys->p_bus,
GST_MESSAGE_ASYNC_DONE | GST_MESSAGE_ERROR |
GST_MESSAGE_EOS | GST_MESSAGE_WARNING |
GST_MESSAGE_INFO );
if( p_msg )
{
switch( GST_MESSAGE_TYPE( p_msg ) ){
case GST_MESSAGE_EOS:
/* for debugging purpose */
msg_Warn( p_dec, "got unexpected eos" );
break;
/* First buffer received */
case GST_MESSAGE_ASYNC_DONE:
/* for debugging purpose */
p_sys->b_prerolled = true;
msg_Dbg( p_dec, "Pipeline is prerolled" );
break;
default:
p_dec->b_error = default_msg_handler( p_dec, p_msg );
if( p_dec->b_error )
{
gst_message_unref( p_msg );
goto done;
}
break;
}
gst_message_unref( p_msg );
}
/* Look for any output buffers in the queue */
if( gst_atomic_queue_peek( p_sys->p_que ) )
{
GstBuffer *p_buf = GST_BUFFER_CAST(
gst_atomic_queue_pop( p_sys->p_que ));
GstMemory *p_mem;
if(( p_mem = gst_buffer_peek_memory( p_buf, 0 )) &&
GST_IS_VLC_PICTURE_PLANE_ALLOCATOR( p_mem->allocator ))
{
p_pic = picture_Hold(( (GstVlcPicturePlane*) p_mem )->p_pic );
}
else
{
GstVideoFrame frame;
/* Get a new picture */
p_pic = decoder_NewPicture( p_dec );
if( !p_pic )
goto done;
if( unlikely( !gst_video_frame_map( &frame,
&p_sys->vinfo, p_buf, GST_MAP_READ ) ) )
{
msg_Err( p_dec, "failed to map gst video frame" );
gst_buffer_unref( p_buf );
p_dec->b_error = true;
goto done;
}
gst_CopyPicture( p_pic, &frame );
gst_video_frame_unmap( &frame );
}
if( likely( GST_BUFFER_PTS_IS_VALID( p_buf ) ) )
p_pic->date = gst_util_uint64_scale(
GST_BUFFER_PTS( p_buf ), GST_MSECOND, GST_SECOND );
else
msg_Warn( p_dec, "Gst Buffer has no timestamp" );
gst_buffer_unref( p_buf );
}
done:
*pp_block = NULL;
return p_pic;
}
/* Close the decoder instance */
static void CloseDecoder( vlc_object_t *p_this )
{
decoder_t *p_dec = ( decoder_t* )p_this;
decoder_sys_t *p_sys = p_dec->p_sys;
gboolean b_running = p_sys->b_running;
if( b_running )
{
GstMessage *p_msg;
GstFlowReturn i_ret;
p_sys->b_running = false;
/* Send EOS to the pipeline */
i_ret = gst_app_src_end_of_stream(
GST_APP_SRC_CAST( p_sys->p_decode_src ));
msg_Dbg( p_dec, "app src eos: %s", gst_flow_get_name( i_ret ) );
/* and catch it on the bus with a timeout */
p_msg = gst_bus_timed_pop_filtered( p_sys->p_bus,
2000000000ULL, GST_MESSAGE_EOS | GST_MESSAGE_ERROR );
if( p_msg )
{
switch( GST_MESSAGE_TYPE( p_msg ) ){
case GST_MESSAGE_EOS:
msg_Dbg( p_dec, "got eos" );
break;
default:
p_dec->b_error = default_msg_handler( p_dec, p_msg );
if( p_dec->b_error )
msg_Err( p_dec, "pipeline may not close gracefully" );
break;
}
gst_message_unref( p_msg );
}
else
msg_Warn( p_dec,
"no message, pipeline may not close gracefully" );
}
/* Remove any left-over buffers from the queue */
if( p_sys->p_que )
{
GstBuffer *p_buf;
while( ( p_buf = gst_atomic_queue_pop( p_sys->p_que ) ) )
gst_buffer_unref( p_buf );
gst_atomic_queue_unref( p_sys->p_que );
}
if( b_running && gst_element_set_state( p_sys->p_decoder, GST_STATE_NULL )
!= GST_STATE_CHANGE_SUCCESS )
msg_Err( p_dec,
"failed to change the state to NULL," \
"pipeline may not close gracefully" );
if( p_sys->p_allocator )
gst_object_unref( p_sys->p_allocator );
if( p_sys->p_bus )
gst_object_unref( p_sys->p_bus );
if( p_sys->p_decode_src )
gst_object_unref( p_sys->p_decode_src );
if( p_sys->p_decode_in )
gst_object_unref( p_sys->p_decode_in );
if( p_sys->p_decode_out )
gst_object_unref( p_sys->p_decode_out );
if( p_sys->p_decoder )
gst_object_unref( p_sys->p_decoder );
free( p_sys );
}
static GstFlowReturn
gst_app_src_create (GstBaseSrc * bsrc, guint64 offset, guint size,
GstBuffer ** buf)
{
GstAppSrc *appsrc = GST_APP_SRC_CAST (bsrc);
GstAppSrcPrivate *priv = appsrc->priv;
GstFlowReturn ret;
GST_OBJECT_LOCK (appsrc);
if (G_UNLIKELY (priv->size != bsrc->segment.duration &&
bsrc->segment.format == GST_FORMAT_BYTES)) {
GST_DEBUG_OBJECT (appsrc,
"Size changed from %" G_GINT64_FORMAT " to %" G_GINT64_FORMAT,
bsrc->segment.duration, priv->size);
bsrc->segment.duration = priv->size;
GST_OBJECT_UNLOCK (appsrc);
gst_element_post_message (GST_ELEMENT (appsrc),
gst_message_new_duration_changed (GST_OBJECT (appsrc)));
} else {
GST_OBJECT_UNLOCK (appsrc);
}
g_mutex_lock (&priv->mutex);
/* check flushing first */
if (G_UNLIKELY (priv->flushing))
goto flushing;
if (priv->stream_type == GST_APP_STREAM_TYPE_RANDOM_ACCESS) {
/* if we are dealing with a random-access stream, issue a seek if the offset
* changed. */
if (G_UNLIKELY (priv->offset != offset)) {
gboolean res;
/* do the seek */
res = gst_app_src_emit_seek (appsrc, offset);
if (G_UNLIKELY (!res))
/* failing to seek is fatal */
goto seek_error;
priv->offset = offset;
priv->is_eos = FALSE;
}
}
while (TRUE) {
/* return data as long as we have some */
if (!g_queue_is_empty (priv->queue)) {
guint buf_size;
if (priv->new_caps) {
gst_app_src_do_negotiate (bsrc);
priv->new_caps = FALSE;
}
*buf = g_queue_pop_head (priv->queue);
buf_size = gst_buffer_get_size (*buf);
GST_DEBUG_OBJECT (appsrc, "we have buffer %p of size %u", *buf, buf_size);
priv->queued_bytes -= buf_size;
/* only update the offset when in random_access mode */
if (priv->stream_type == GST_APP_STREAM_TYPE_RANDOM_ACCESS)
priv->offset += buf_size;
/* signal that we removed an item */
g_cond_broadcast (&priv->cond);
/* see if we go lower than the empty-percent */
if (priv->min_percent && priv->max_bytes) {
if (priv->queued_bytes * 100 / priv->max_bytes <= priv->min_percent)
/* ignore flushing state, we got a buffer and we will return it now.
* Errors will be handled in the next round */
gst_app_src_emit_need_data (appsrc, size);
}
ret = GST_FLOW_OK;
break;
} else {
gst_app_src_emit_need_data (appsrc, size);
/* we can be flushing now because we released the lock above */
if (G_UNLIKELY (priv->flushing))
goto flushing;
/* if we have a buffer now, continue the loop and try to return it. In
* random-access mode (where a buffer is normally pushed in the above
* signal) we can still be empty because the pushed buffer got flushed or
* when the application pushes the requested buffer later, we support both
* possibilities. */
if (!g_queue_is_empty (priv->queue))
continue;
/* no buffer yet, maybe we are EOS, if not, block for more data. */
}
/* check EOS */
if (G_UNLIKELY (priv->is_eos))
goto eos;
/* nothing to return, wait a while for new data or flushing. */
g_cond_wait (&priv->cond, &priv->mutex);
}
g_mutex_unlock (&priv->mutex);
return ret;
/* ERRORS */
flushing:
{
GST_DEBUG_OBJECT (appsrc, "we are flushing");
g_mutex_unlock (&priv->mutex);
return GST_FLOW_FLUSHING;
}
eos:
{
GST_DEBUG_OBJECT (appsrc, "we are EOS");
g_mutex_unlock (&priv->mutex);
return GST_FLOW_EOS;
}
seek_error:
{
g_mutex_unlock (&priv->mutex);
GST_ELEMENT_ERROR (appsrc, RESOURCE, READ, ("failed to seek"),
GST_ERROR_SYSTEM);
return GST_FLOW_ERROR;
}
}
bool nvxio::GStreamerVideoRenderImpl::InitializeGStreamerPipeline()
{
std::ostringstream stream;
pipeline = GST_PIPELINE(gst_pipeline_new(NULL));
if (pipeline == NULL)
{
NVXIO_PRINT("Cannot create Gstreamer pipeline");
return false;
}
bus = gst_pipeline_get_bus(GST_PIPELINE (pipeline));
// create appsrc
GstElement * appsrcelem = gst_element_factory_make("appsrc", NULL);
if (appsrcelem == NULL)
{
NVXIO_PRINT("Cannot create appsrc");
FinalizeGStreamerPipeline();
return false;
}
g_object_set(G_OBJECT(appsrcelem), "is-live", 0, NULL);
g_object_set(G_OBJECT(appsrcelem), "num-buffers", -1, NULL);
g_object_set(G_OBJECT(appsrcelem), "emit-signals", 0, NULL);
g_object_set(G_OBJECT(appsrcelem), "block", 1, NULL);
g_object_set(G_OBJECT(appsrcelem), "size", static_cast<guint64>(wndHeight_ * wndWidth_ * 4), NULL);
g_object_set(G_OBJECT(appsrcelem), "format", GST_FORMAT_TIME, NULL);
g_object_set(G_OBJECT(appsrcelem), "stream-type", GST_APP_STREAM_TYPE_STREAM, NULL);
appsrc = GST_APP_SRC_CAST(appsrcelem);
#if GST_VERSION_MAJOR == 0
GstCaps * caps = gst_caps_new_simple("video/x-raw-rgb",
"bpp", G_TYPE_INT, 32,
"endianness", G_TYPE_INT, 4321,
"red_mask", G_TYPE_INT, -16777216,
"green_mask", G_TYPE_INT, 16711680,
"blue_mask", G_TYPE_INT, 65280,
"alpha_mask", G_TYPE_INT, 255,
"width", G_TYPE_INT, wndWidth_,
"height", G_TYPE_INT, wndHeight_,
"framerate", GST_TYPE_FRACTION, GSTREAMER_DEFAULT_FPS, 1,
NULL);
if (caps == NULL)
{
NVXIO_PRINT("Failed to create caps");
FinalizeGStreamerPipeline();
return false;
}
#else
// support 4 channel 8 bit data
stream << "video/x-raw"
<< ", width=" << wndWidth_
<< ", height=" << wndHeight_
<< ", format=(string){RGBA}"
<< ", framerate=" << GSTREAMER_DEFAULT_FPS << "/1;";
GstCaps * caps = gst_caps_from_string(stream.str().c_str());
if (caps == NULL)
{
NVXIO_PRINT("Failed to create caps");
FinalizeGStreamerPipeline();
return false;
}
caps = gst_caps_fixate(caps);
#endif
gst_app_src_set_caps(appsrc, caps);
gst_caps_unref(caps);
gst_bin_add(GST_BIN(pipeline), appsrcelem);
// create color convert element
GstElement * color = gst_element_factory_make(COLOR_ELEM, NULL);
if (color == NULL)
{
NVXIO_PRINT("Cannot create " COLOR_ELEM " element");
FinalizeGStreamerPipeline();
return false;
}
gst_bin_add(GST_BIN(pipeline), color);
// create videoflip element
GstElement * videoflip = gst_element_factory_make("videoflip", NULL);
if (videoflip == NULL)
{
NVXIO_PRINT("Cannot create videoflip element");
FinalizeGStreamerPipeline();
return false;
}
g_object_set(G_OBJECT(videoflip), "method", 5, NULL);
gst_bin_add(GST_BIN(pipeline), videoflip);
// create encodelem element
GstElement * encodelem = gst_element_factory_make(ENCODE_ELEM, NULL);
if (encodelem == NULL)
{
NVXIO_PRINT("Cannot create " ENCODE_ELEM " element");
FinalizeGStreamerPipeline();
return false;
}
gst_bin_add(GST_BIN(pipeline), encodelem);
// create avimux element
GstElement * avimux = gst_element_factory_make("avimux", NULL);
if (avimux == NULL)
{
NVXIO_PRINT("Cannot create avimux element");
FinalizeGStreamerPipeline();
return false;
}
gst_bin_add(GST_BIN(pipeline), avimux);
// create filesink element
GstElement * filesink = gst_element_factory_make("filesink", NULL);
if (filesink == NULL)
{
NVXIO_PRINT("Cannot create filesink element");
FinalizeGStreamerPipeline();
return false;
}
g_object_set(G_OBJECT(filesink), "location", windowTitle_.c_str(), NULL);
g_object_set(G_OBJECT(filesink), "append", 0, NULL);
gst_bin_add(GST_BIN(pipeline), filesink);
// link elements
if (!gst_element_link_many(appsrcelem, color, videoflip,
encodelem, avimux, filesink, NULL))
{
NVXIO_PRINT("GStreamer: cannot link appsrc -> " COLOR_ELEM
" -> videoflip -> " ENCODE_ELEM " -> avimux -> filesink");
FinalizeGStreamerPipeline();
return false;
}
// Force pipeline to play video as fast as possible, ignoring system clock
gst_pipeline_use_clock(pipeline, NULL);
num_frames = 0;
GstStateChangeReturn status = gst_element_set_state(GST_ELEMENT(pipeline), GST_STATE_PLAYING);
if (status == GST_STATE_CHANGE_FAILURE)
{
NVXIO_PRINT("GStreamer: unable to start playback");
FinalizeGStreamerPipeline();
return false;
}
return true;
}