From 35c1f2c8ba43f6e8c567046247395042f775f80e Mon Sep 17 00:00:00 2001 From: Přemysl Eric Janouch Date: Sat, 8 Jan 2022 07:44:39 +0100 Subject: Parallelize thumbnail production --- fiv-browser.c | 122 ++++++++++++++++++++++++++++++++++++---------------------- 1 file changed, 75 insertions(+), 47 deletions(-) diff --git a/fiv-browser.c b/fiv-browser.c index 2f99175..d58e180 100644 --- a/fiv-browser.c +++ b/fiv-browser.c @@ -41,6 +41,17 @@ // The glow is actually a glowing margin, the border is rendered in two parts. // +typedef struct entry Entry; +typedef struct item Item; +typedef struct row Row; + +typedef struct _Thumbnailer { + FivBrowser *self; ///< Parent browser + Entry *target; ///< Currently processed Entry pointer + GSubprocess *minion; ///< A slave for the current queue head + GCancellable *cancel; ///< Cancellable handle +} Thumbnailer; + struct _FivBrowser { GtkWidget parent_instance; @@ -53,9 +64,9 @@ struct _FivBrowser { GArray *layouted_rows; ///< []Row int selected; - GList *thumbnail_queue; ///< Entry pointers - GSubprocess *thumbnailer; ///< A slave for the current queue head - GCancellable *thumbnail_cancel; ///< Cancellable handle + Thumbnailer *thumbnailers; ///< Parallelized thumbnailers + size_t thumbnailers_len; ///< Thumbnailers array size + GList *thumbnailers_queue; ///< Queued up Entry pointers GdkCursor *pointer; ///< Cached pointer cursor cairo_surface_t *glow; ///< CAIRO_FORMAT_A8 mask @@ -63,10 +74,6 @@ struct _FivBrowser { int item_border_y; ///< T/B .item margin + border }; -typedef struct entry Entry; -typedef struct item Item; -typedef struct row Row; - // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - struct entry { @@ -450,9 +457,9 @@ reload_thumbnails(FivBrowser *self) gtk_widget_queue_resize(GTK_WIDGET(self)); } -// --- Slave management -------------------------------------------------------- +// --- Minion management ------------------------------------------------------- -static void thumbnailer_next(FivBrowser *self); +static gboolean thumbnailer_next(Thumbnailer *thumbnailer); static void thumbnailer_reprocess_entry(FivBrowser *self, Entry *entry) @@ -466,7 +473,8 @@ static void on_thumbnailer_ready(GObject *object, GAsyncResult *res, gpointer user_data) { GSubprocess *subprocess = G_SUBPROCESS(object); - FivBrowser *self = FIV_BROWSER(user_data); + Thumbnailer *thumbnailer = user_data; + GError *error = NULL; if (!g_subprocess_wait_check_finish(subprocess, res, &error)) { if (g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) { @@ -479,67 +487,78 @@ on_thumbnailer_ready(GObject *object, GAsyncResult *res, gpointer user_data) g_error_free(error); } + g_return_if_fail(subprocess == thumbnailer->minion); + gboolean succeeded = g_subprocess_get_if_exited(subprocess) && g_subprocess_get_exit_status(subprocess) == EXIT_SUCCESS; - g_clear_object(&self->thumbnailer); - if (!self->thumbnail_queue) { + g_clear_object(&thumbnailer->minion); + if (!thumbnailer->target) { g_warning("finished thumbnailing an unknown image"); return; } - Entry *entry = self->thumbnail_queue->data; - self->thumbnail_queue = - g_list_delete_link(self->thumbnail_queue, self->thumbnail_queue); if (succeeded) - thumbnailer_reprocess_entry(self, entry); + thumbnailer_reprocess_entry(thumbnailer->self, thumbnailer->target); - thumbnailer_next(self); + thumbnailer->target = NULL; + thumbnailer_next(thumbnailer); } -static void -thumbnailer_next(FivBrowser *self) +static gboolean +thumbnailer_next(Thumbnailer *thumbnailer) { - // TODO(p): At least launch multiple thumbnailers in parallel. - // Ideally, try to keep them alive. - GList *link = self->thumbnail_queue; + // TODO(p): Ideally, try to keep the minions alive. + FivBrowser *self = thumbnailer->self; + GList *link = self->thumbnailers_queue; if (!link) - return; + return FALSE; + + thumbnailer->target = link->data; + self->thumbnailers_queue = + g_list_delete_link(self->thumbnailers_queue, self->thumbnailers_queue); - const Entry *entry = link->data; GError *error = NULL; - self->thumbnailer = g_subprocess_new(G_SUBPROCESS_FLAGS_NONE, &error, + thumbnailer->minion = g_subprocess_new(G_SUBPROCESS_FLAGS_NONE, &error, PROJECT_NAME, "--thumbnail", fiv_thumbnail_sizes[self->item_size].thumbnail_spec_name, "--", - entry->uri, NULL); + thumbnailer->target->uri, NULL); if (error) { g_warning("%s", error->message); g_error_free(error); - return; + return FALSE; } - self->thumbnail_cancel = g_cancellable_new(); - g_subprocess_wait_check_async( - self->thumbnailer, self->thumbnail_cancel, on_thumbnailer_ready, self); + thumbnailer->cancel = g_cancellable_new(); + g_subprocess_wait_check_async(thumbnailer->minion, thumbnailer->cancel, + on_thumbnailer_ready, thumbnailer); + return TRUE; } +// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + static void -thumbnailer_abort(FivBrowser *self) +thumbnailers_abort(FivBrowser *self) { - if (self->thumbnail_cancel) { - g_cancellable_cancel(self->thumbnail_cancel); - g_clear_object(&self->thumbnail_cancel); - } + g_list_free(self->thumbnailers_queue); + self->thumbnailers_queue = NULL; + + for (size_t i = 0; i < self->thumbnailers_len; i++) { + Thumbnailer *thumbnailer = self->thumbnailers + i; + if (thumbnailer->cancel) { + g_cancellable_cancel(thumbnailer->cancel); + g_clear_object(&thumbnailer->cancel); + } - // Just let it exit on its own. - g_clear_object(&self->thumbnailer); - g_list_free(self->thumbnail_queue); - self->thumbnail_queue = NULL; + // Just let them exit on their own. + g_clear_object(&thumbnailer->minion); + thumbnailer->target = NULL; + } } static void -thumbnailer_start(FivBrowser *self) +thumbnailers_start(FivBrowser *self) { - thumbnailer_abort(self); + thumbnailers_abort(self); // TODO(p): Leave out all paths containing .cache/thumbnails altogether. gchar *thumbnails_dir = fiv_thumbnail_get_root(); @@ -562,8 +581,11 @@ thumbnailer_start(FivBrowser *self) lq = g_list_prepend(lq, entry); } - self->thumbnail_queue = g_list_concat(missing, lq); - thumbnailer_next(self); + self->thumbnailers_queue = g_list_concat(missing, lq); + for (size_t i = 0; i < self->thumbnailers_len; i++) { + if (!thumbnailer_next(self->thumbnailers + i)) + break; + } } // --- Context menu------------------------------------------------------------- @@ -750,7 +772,7 @@ static void fiv_browser_finalize(GObject *gobject) { FivBrowser *self = FIV_BROWSER(gobject); - thumbnailer_abort(self); + thumbnailers_abort(self); g_array_free(self->entries, TRUE); g_array_free(self->layouted_rows, TRUE); if (self->model) { @@ -1146,9 +1168,15 @@ fiv_browser_init(FivBrowser *self) g_array_set_clear_func(self->entries, (GDestroyNotify) entry_free); self->layouted_rows = g_array_new(FALSE, TRUE, sizeof(Row)); g_array_set_clear_func(self->layouted_rows, (GDestroyNotify) row_free); + self->selected = -1; + + self->thumbnailers_len = g_get_num_processors(); + self->thumbnailers = + g_malloc0_n(self->thumbnailers_len, sizeof *self->thumbnailers); + for (size_t i = 0; i < self->thumbnailers_len; i++) + self->thumbnailers[i].self = self; set_item_size(self, FIV_THUMBNAIL_SIZE_NORMAL); - self->selected = -1; self->glow = cairo_image_surface_create(CAIRO_FORMAT_A1, 0, 0); g_signal_connect_swapped(gtk_settings_get_default(), @@ -1163,7 +1191,7 @@ on_model_files_changed(FivIoModel *model, FivBrowser *self) g_return_if_fail(model == self->model); // TODO(p): Later implement arguments. - thumbnailer_abort(self); + thumbnailers_abort(self); g_array_set_size(self->entries, 0); g_array_set_size(self->layouted_rows, 0); @@ -1176,7 +1204,7 @@ on_model_files_changed(FivIoModel *model, FivBrowser *self) g_ptr_array_free(files, TRUE); reload_thumbnails(self); - thumbnailer_start(self); + thumbnailers_start(self); } GtkWidget * -- cgit v1.2.3-70-g09d2