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screen-cast: Handle PipeWire errors more gracefully

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Various code assumed PipeWire function calls would never fail. Some can
actually fail for real reasons, and some currently can only fail due to
OOM situations, but we should still not assume that will always be the
case.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/102


(cherry picked from commit 0f9c6aef99)
This commit is contained in:
Jonas Ådahl 2018-05-03 16:07:22 +02:00
parent 889c56c776
commit 32f02010ae
1 changed files with 33 additions and 6 deletions
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33
src/backends/meta-screen-cast-stream-src.c
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@ -153,6 +153,11 @@ meta_screen_cast_stream_src_maybe_record_frame (MetaScreenCastStreamSrc *src)
return; return;
buffer = pw_stream_peek_buffer (priv->pipewire_stream, buffer_id); buffer = pw_stream_peek_buffer (priv->pipewire_stream, buffer_id);
if (!buffer)
{
g_warning ("Failed to peek at PipeWire buffer");
return;
}
if (buffer->datas[0].type == priv->pipewire_type->data.MemFd) if (buffer->datas[0].type == priv->pipewire_type->data.MemFd)
{ {
@ -327,10 +332,18 @@ create_pipewire_stream (MetaScreenCastStreamSrc *src,
struct spa_fraction max_framerate; struct spa_fraction max_framerate;
struct spa_fraction min_framerate; struct spa_fraction min_framerate;
const struct spa_pod *params[1]; const struct spa_pod *params[1];
int result;
pipewire_stream = pw_stream_new (priv->pipewire_remote, pipewire_stream = pw_stream_new (priv->pipewire_remote,
"meta-screen-cast-src", "meta-screen-cast-src",
NULL); NULL);
if (!pipewire_stream)
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
"Failed to create PipeWire stream: %s",
strerror (errno));
return NULL;
}
meta_screen_cast_stream_src_get_specs (src, &width, &height, &frame_rate); meta_screen_cast_stream_src_get_specs (src, &width, &height, &frame_rate);
frame_rate_fraction = meta_fraction_from_double (frame_rate); frame_rate_fraction = meta_fraction_from_double (frame_rate);
@ -356,14 +369,15 @@ create_pipewire_stream (MetaScreenCastStreamSrc *src,
&stream_events, &stream_events,
src); src);
if (pw_stream_connect (pipewire_stream, result = pw_stream_connect (pipewire_stream,
PW_DIRECTION_OUTPUT, PW_DIRECTION_OUTPUT,
NULL, NULL,
PW_STREAM_FLAG_NONE, PW_STREAM_FLAG_NONE,
params, G_N_ELEMENTS (params)) != 0) params, G_N_ELEMENTS (params));
if (result != 0)
{ {
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
"Could not connect"); "Could not connect: %s", spa_strerror (result));
return NULL; return NULL;
} }
@ -466,6 +480,12 @@ create_pipewire_source (void)
(MetaPipeWireSource *) g_source_new (&pipewire_source_funcs, (MetaPipeWireSource *) g_source_new (&pipewire_source_funcs,
sizeof (MetaPipeWireSource)); sizeof (MetaPipeWireSource));
pipewire_source->pipewire_loop = pw_loop_new (NULL); pipewire_source->pipewire_loop = pw_loop_new (NULL);
if (!pipewire_source->pipewire_loop)
{
g_source_destroy ((GSource *) pipewire_source);
return NULL;
}
g_source_add_unix_fd (&pipewire_source->base, g_source_add_unix_fd (&pipewire_source->base,
pw_loop_get_fd (pipewire_source->pipewire_loop), pw_loop_get_fd (pipewire_source->pipewire_loop),
G_IO_IN | G_IO_ERR); G_IO_IN | G_IO_ERR);
@ -491,6 +511,13 @@ meta_screen_cast_stream_src_initable_init (GInitable *initable,
meta_screen_cast_stream_src_get_instance_private (src); meta_screen_cast_stream_src_get_instance_private (src);
priv->pipewire_source = create_pipewire_source (); priv->pipewire_source = create_pipewire_source ();
if (!priv->pipewire_source)
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
"Failed to create PipeWire source");
return FALSE;
}
priv->pipewire_core = pw_core_new (priv->pipewire_source->pipewire_loop, priv->pipewire_core = pw_core_new (priv->pipewire_source->pipewire_loop,
NULL); NULL);
if (!priv->pipewire_core) if (!priv->pipewire_core)