diff options
Diffstat (limited to 'gst-libs/gst/play/play.c')
| -rw-r--r-- | gst-libs/gst/play/play.c | 215 |
1 files changed, 124 insertions, 91 deletions
diff --git a/gst-libs/gst/play/play.c b/gst-libs/gst/play/play.c index 6d5f7051..a7a04a05 100644 --- a/gst-libs/gst/play/play.c +++ b/gst-libs/gst/play/play.c @@ -46,6 +46,10 @@ struct _GstPlayPrivate { guint length_id; gulong handoff_hid; + + /* error/debug handling */ + GError *error; + gchar *debug; }; static guint gst_play_signals[LAST_SIGNAL] = { 0 }; @@ -58,8 +62,64 @@ static GstPipelineClass *parent_class = NULL; /* */ /* ======================================================= */ +static GQuark +gst_play_error_quark (void) +{ + static GQuark quark = 0; + if (quark == 0) + quark = g_quark_from_static_string ("gst-play-error-quark"); + return quark; +} + +/* General GError creation */ +static void +gst_play_error_create (GError ** error, const gchar *message) +{ + /* check if caller wanted an error reported */ + if (error == NULL) + return; + + *error = g_error_new (GST_PLAY_ERROR, 0, message); + return; +} + +/* GError creation when plugin is missing */ +/* FIXME: what if multiple elements could have been used and they're all + * missing ? varargs ? */ +static void +gst_play_error_plugin (const gchar *element, GError ** error) +{ + gchar *message; + + message = g_strdup_printf ("The %s element could not be found. " + "This element is essential for playback. " + "Please install the right plug-in and verify " + "that it works by running 'gst-inspect %s'", + element, element); + gst_play_error_create (error, message); + g_free (message); + return; +} + +#define GST_PLAY_MAKE_OR_ERROR(el, factory, name, error) \ +G_STMT_START { \ + el = gst_element_factory_make (factory, name); \ + if (!GST_IS_ELEMENT (el)) \ + { \ + gst_play_error_plugin (factory, error); \ + return FALSE; \ + } \ +} G_STMT_END + +#define GST_PLAY_ERROR_RETURN(error, message) \ +G_STMT_START { \ + gst_play_error_create (error, message); \ + return FALSE; \ +} G_STMT_END + + static gboolean -gst_play_pipeline_setup (GstPlay *play) +gst_play_pipeline_setup (GstPlay *play, GError **error) { /* Threads */ GstElement *work_thread, *audio_thread, *video_thread; @@ -81,47 +141,29 @@ gst_play_pipeline_setup (GstPlay *play) /* Creating main thread and its elements */ { - work_thread = gst_element_factory_make ("thread", "work_thread"); - if (!GST_IS_ELEMENT (work_thread)) - return FALSE; - + GST_PLAY_MAKE_OR_ERROR (work_thread, "thread", "work_thread", error); g_hash_table_insert (play->priv->elements, "work_thread", work_thread); gst_bin_add (GST_BIN (play), work_thread); /* Placeholder for datasrc */ - source = gst_element_factory_make ("fakesrc", "source"); - if (!GST_IS_ELEMENT (source)) - return FALSE; - + GST_PLAY_MAKE_OR_ERROR (source, "fakesrc", "source", error); g_hash_table_insert (play->priv->elements, "source", source); /* Autoplugger */ - autoplugger = gst_element_factory_make ("spider", "autoplugger"); - if (!GST_IS_ELEMENT (autoplugger)) - return FALSE; - + GST_PLAY_MAKE_OR_ERROR (autoplugger, "spider", "autoplugger", error); g_hash_table_insert (play->priv->elements, "autoplugger", autoplugger); /* Make sure we convert audio to the needed format */ - audioconvert = gst_element_factory_make ("audioconvert", - "audioconvert"); - if (!GST_IS_ELEMENT (audioconvert)) - return FALSE; - + GST_PLAY_MAKE_OR_ERROR (audioconvert, "audioconvert", "audioconvert", error); + /* FIXME: why are volume and audioconvert switched around for the insert ) */ g_hash_table_insert (play->priv->elements, "volume", audioconvert); /* Volume control */ - volume = gst_element_factory_make ("volume", "volume"); - if (!GST_IS_ELEMENT (volume)) - return FALSE; - + GST_PLAY_MAKE_OR_ERROR (volume, "volume", "volume", error); g_hash_table_insert (play->priv->elements, "audioconvert", volume); /* Duplicate audio signal to audio sink and visualization thread */ - tee = gst_element_factory_make ("tee", "tee"); - if (!GST_IS_ELEMENT (tee)) - return FALSE; - + GST_PLAY_MAKE_OR_ERROR (tee, "tee", "tee", error); tee_pad1 = gst_element_get_request_pad (tee, "src%d"); tee_pad2 = gst_element_get_request_pad (tee, "src%d"); g_hash_table_insert (play->priv->elements, "tee_pad1", tee_pad1); @@ -130,48 +172,45 @@ gst_play_pipeline_setup (GstPlay *play) gst_bin_add_many (GST_BIN (work_thread), source, autoplugger,/* audioconvert,*/ volume, tee, NULL); - gst_element_link_many (source, autoplugger,/* audioconvert,*/ volume, tee, NULL); + if (!gst_element_link_many (source, autoplugger,/* audioconvert,*/ volume, tee, NULL)) + GST_PLAY_ERROR_RETURN (error, "Could not link source thread elements"); /* identity ! colorspace ! switch */ - identity = gst_element_factory_make ("identity", "identity"); - if (!GST_IS_ELEMENT (identity)) - return FALSE; - + GST_PLAY_MAKE_OR_ERROR (identity, "identity", "identity", error); g_hash_table_insert (play->priv->elements, "identity", identity); identity_cs = gst_element_factory_make ("ffcolorspace", "identity_cs"); if (!GST_IS_ELEMENT (identity_cs)) { identity_cs = gst_element_factory_make ("colorspace", "identity_cs"); if (!GST_IS_ELEMENT (identity_cs)) + { + gst_play_error_plugin ("colorspace", error); return FALSE; + } } - g_hash_table_insert (play->priv->elements, "identity_cs", identity_cs); - gst_bin_add_many (GST_BIN (work_thread), identity, identity_cs, NULL); - gst_element_link_many (autoplugger, identity, identity_cs, NULL); + if (!gst_element_link_many (autoplugger, identity, identity_cs, NULL)) + GST_PLAY_ERROR_RETURN (error, "Could not link work thread elements"); } /* Visualization bin (note: it s not added to the pipeline yet) */ { vis_bin = gst_bin_new ("vis_bin"); if (!GST_IS_ELEMENT (vis_bin)) + { + gst_play_error_plugin ("bin", error); return FALSE; + } g_hash_table_insert (play->priv->elements, "vis_bin", vis_bin); /* Buffer queue for video data */ - vis_queue = gst_element_factory_make ("queue", "vis_queue"); - if (!GST_IS_ELEMENT (vis_queue)) - return FALSE; - + GST_PLAY_MAKE_OR_ERROR (vis_queue, "queue", "vis_queue", error); g_hash_table_insert (play->priv->elements, "vis_queue", vis_queue); /* Visualization element placeholder */ - vis_element = gst_element_factory_make ("identity", "vis_element"); - if (!GST_IS_ELEMENT (vis_element)) - return FALSE; - + GST_PLAY_MAKE_OR_ERROR (vis_element, "identity", "vis_element", error); g_hash_table_insert (play->priv->elements, "vis_element", vis_element); /* Colorspace conversion */ @@ -179,36 +218,31 @@ gst_play_pipeline_setup (GstPlay *play) if (!GST_IS_ELEMENT (vis_cs)) { vis_cs = gst_element_factory_make ("colorspace", "vis_cs"); if (!GST_IS_ELEMENT (vis_cs)) + { + gst_play_error_plugin ("colorspace", error); return FALSE; + } } g_hash_table_insert (play->priv->elements, "vis_cs", vis_cs); gst_bin_add_many (GST_BIN (vis_bin), vis_queue, vis_element, vis_cs, NULL); - gst_element_link_many (vis_queue, vis_element, vis_cs, NULL); + if (!gst_element_link_many (vis_queue, vis_element, vis_cs, NULL)) + GST_PLAY_ERROR_RETURN (error, "Could not link visualisation thread elements"); gst_element_add_ghost_pad (vis_bin, gst_element_get_pad (vis_cs, "src"), "src"); } /* Creating our video output bin */ { - video_thread = gst_element_factory_make ("thread", "video_thread"); - if (!GST_IS_ELEMENT (video_thread)) - return FALSE; - + GST_PLAY_MAKE_OR_ERROR (video_thread, "thread", "video_thread", error); g_hash_table_insert (play->priv->elements, "video_thread", video_thread); gst_bin_add (GST_BIN (work_thread), video_thread); /* Buffer queue for video data */ - video_queue = gst_element_factory_make ("queue", "video_queue"); - if (!GST_IS_ELEMENT (video_queue)) - return FALSE; - + GST_PLAY_MAKE_OR_ERROR (video_queue, "queue", "video_queue", error); g_hash_table_insert (play->priv->elements, "video_queue", video_queue); - video_switch = gst_element_factory_make ("switch", "video_switch"); - if (!GST_IS_ELEMENT (video_switch)) - return FALSE; - + GST_PLAY_MAKE_OR_ERROR (video_switch, "switch", "video_switch", error); g_hash_table_insert (play->priv->elements, "video_switch", video_switch); /* Colorspace conversion */ @@ -216,79 +250,67 @@ gst_play_pipeline_setup (GstPlay *play) if (!GST_IS_ELEMENT (video_cs)) { video_cs = gst_element_factory_make ("colorspace", "video_cs"); if (!GST_IS_ELEMENT (video_cs)) + { + gst_play_error_plugin ("colorspace", error); return FALSE; + } } - g_hash_table_insert (play->priv->elements, "video_cs", video_cs); /* Software colorbalance */ - video_balance = gst_element_factory_make ("videobalance", - "video_balance"); - if (!GST_IS_ELEMENT (video_balance)) - return FALSE; - - g_hash_table_insert (play->priv->elements, "video_balance", - video_balance); + GST_PLAY_MAKE_OR_ERROR (video_balance, "videobalance", "video_balance", error); + g_hash_table_insert (play->priv->elements, "video_balance", video_balance); /* Colorspace conversion */ balance_cs = gst_element_factory_make ("ffcolorspace", "balance_cs"); if (!GST_IS_ELEMENT (balance_cs)) { balance_cs = gst_element_factory_make ("colorspace", "balance_cs"); if (!GST_IS_ELEMENT (balance_cs)) + { + gst_play_error_plugin ("colorspace", error); return FALSE; + } } - g_hash_table_insert (play->priv->elements, "balance_cs", balance_cs); /* Software scaling of video stream */ - video_scaler = gst_element_factory_make ("videoscale", "video_scaler"); - if (!GST_IS_ELEMENT (video_scaler)) - return FALSE; - + GST_PLAY_MAKE_OR_ERROR (video_scaler, "videoscale", "video_scaler", error); g_hash_table_insert (play->priv->elements, "video_scaler", video_scaler); /* Placeholder for future video sink bin */ - video_sink = gst_element_factory_make ("fakesink", "video_sink"); - if (!GST_IS_ELEMENT (video_sink)) - return FALSE; - + GST_PLAY_MAKE_OR_ERROR (video_sink, "fakesink", "video_sink", error); g_hash_table_insert (play->priv->elements, "video_sink", video_sink); gst_bin_add_many (GST_BIN (video_thread), video_queue, video_switch, video_cs, video_balance, balance_cs, video_scaler, video_sink, NULL); - gst_element_link_many (video_queue, video_switch, video_cs, video_balance, - balance_cs, video_scaler, video_sink, NULL); + if (!gst_element_link_many (video_queue, video_switch, video_cs, + video_balance, balance_cs, video_scaler, + video_sink, NULL)) + GST_PLAY_ERROR_RETURN (error, "Could not link video output thread elements"); gst_element_add_ghost_pad (video_thread, gst_element_get_pad (video_queue, "sink"), "sink"); - gst_element_link (identity_cs, video_thread); + if (!gst_element_link (identity_cs, video_thread)) + GST_PLAY_ERROR_RETURN (error, "Could not link video output thread elements"); } /* Creating our audio output bin { queue ! fakesink } */ { - audio_thread = gst_element_factory_make ("thread", "audio_thread"); - if (!GST_IS_ELEMENT (audio_thread)) - return FALSE; - + GST_PLAY_MAKE_OR_ERROR (audio_thread, "thread", "audio_thread", error); g_hash_table_insert (play->priv->elements, "audio_thread", audio_thread); gst_bin_add (GST_BIN (work_thread), audio_thread); /* Buffer queue for our audio thread */ - audio_queue = gst_element_factory_make ("queue", "audio_queue"); - if (!GST_IS_ELEMENT (audio_queue)) - return FALSE; - + GST_PLAY_MAKE_OR_ERROR (audio_queue, "queue", "audio_queue", error); g_hash_table_insert (play->priv->elements, "audio_queue", audio_queue); /* Placeholder for future audio sink bin */ - audio_sink = gst_element_factory_make ("fakesink", "audio_sink"); - if (!GST_IS_ELEMENT (audio_sink)) - return FALSE; - + GST_PLAY_MAKE_OR_ERROR (audio_sink, "fakesink", "audio_sink", error); g_hash_table_insert (play->priv->elements, "audio_sink", audio_sink); gst_bin_add_many (GST_BIN (audio_thread), audio_queue, audio_sink, NULL); - gst_element_link (audio_queue, audio_sink); + if (!gst_element_link (audio_queue, audio_sink)) + GST_PLAY_ERROR_RETURN (error, "Could not link audio output thread elements"); gst_element_add_ghost_pad (audio_thread, gst_element_get_pad (audio_queue, "sink"), "sink"); @@ -486,9 +508,14 @@ gst_play_init (GstPlay *play) play->priv->length_nanos = 0; play->priv->time_nanos = 0; play->priv->elements = g_hash_table_new (g_str_hash, g_str_equal); + play->priv->error = NULL; + play->priv->debug = NULL; - if (!gst_play_pipeline_setup (play)) - g_warning ("libgstplay: failed initializing pipeline"); + if (!gst_play_pipeline_setup (play, &play->priv->error)) + { + g_warning ("libgstplay: failed initializing pipeline, error: %s", + play->priv->error->message); + } } static void @@ -1094,9 +1121,15 @@ gst_play_get_sink_element (GstPlay *play, } GstPlay * -gst_play_new (void) +gst_play_new (GError **error) { GstPlay *play = g_object_new (GST_TYPE_PLAY, NULL); + + if (play->priv->error) + { + *error = play->priv->error; + play->priv->error = NULL; + } return play; } |