| /* poppler-media.cc: glib interface to MediaRendition |
| * |
| * Copyright (C) 2010 Carlos Garcia Campos <carlosgc@gnome.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2, or (at your option) |
| * any later version. |
| * |
| * This program 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 General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "config.h" |
| |
| #include <errno.h> |
| #include <glib/gstdio.h> |
| |
| #include "poppler-media.h" |
| #include "poppler-private.h" |
| |
| /** |
| * SECTION: poppler-media |
| * @short_description: Media |
| * @title: PopplerMedia |
| */ |
| |
| typedef struct _PopplerMediaClass PopplerMediaClass; |
| |
| struct _PopplerMedia |
| { |
| GObject parent_instance; |
| |
| gchar *filename; |
| |
| gchar *mime_type; |
| Object stream; |
| }; |
| |
| struct _PopplerMediaClass |
| { |
| GObjectClass parent_class; |
| }; |
| |
| G_DEFINE_TYPE (PopplerMedia, poppler_media, G_TYPE_OBJECT) |
| |
| static void |
| poppler_media_finalize (GObject *object) |
| { |
| PopplerMedia *media = POPPLER_MEDIA(object); |
| |
| if (media->filename) { |
| g_free (media->filename); |
| media->filename = nullptr; |
| } |
| |
| if (media->mime_type) { |
| g_free (media->mime_type); |
| media->mime_type = nullptr; |
| } |
| |
| media->stream = Object(); |
| |
| G_OBJECT_CLASS (poppler_media_parent_class)->finalize (object); |
| } |
| |
| static void |
| poppler_media_class_init (PopplerMediaClass *klass) |
| { |
| GObjectClass *gobject_class = G_OBJECT_CLASS (klass); |
| |
| gobject_class->finalize = poppler_media_finalize; |
| } |
| |
| static void |
| poppler_media_init (PopplerMedia *media) |
| { |
| } |
| |
| PopplerMedia * |
| _poppler_media_new (const MediaRendition *poppler_media) |
| { |
| PopplerMedia *media; |
| |
| g_assert (poppler_media != nullptr); |
| |
| media = POPPLER_MEDIA (g_object_new (POPPLER_TYPE_MEDIA, nullptr)); |
| |
| if (poppler_media->getIsEmbedded()) { |
| const GooString* mime_type; |
| |
| media->stream = poppler_media->getEmbbededStreamObject()->copy(); |
| mime_type = poppler_media->getContentType(); |
| if (mime_type) |
| media->mime_type = g_strdup (mime_type->getCString()); |
| } else { |
| media->filename = g_strdup (poppler_media->getFileName()->getCString()); |
| } |
| |
| return media; |
| } |
| |
| /** |
| * poppler_media_get_filename: |
| * @poppler_media: a #PopplerMedia |
| * |
| * Returns the media clip filename, in case of non-embedded media. filename might be |
| * a local relative or absolute path or a URI |
| * |
| * Return value: a filename, return value is owned by #PopplerMedia and should not be freed |
| * |
| * Since: 0.14 |
| */ |
| const gchar * |
| poppler_media_get_filename (PopplerMedia *poppler_media) |
| { |
| g_return_val_if_fail (POPPLER_IS_MEDIA (poppler_media), NULL); |
| g_return_val_if_fail (!poppler_media->stream.isStream(), NULL); |
| |
| return poppler_media->filename; |
| } |
| |
| /** |
| * poppler_media_is_embedded: |
| * @poppler_media: a #PopplerMedia |
| * |
| * Whether the media clip is embedded in the PDF. If the result is %TRUE, the embedded stream |
| * can be saved with poppler_media_save() or poppler_media_save_to_callback() function. |
| * If the result is %FALSE, the media clip filename can be retrieved with |
| * poppler_media_get_filename() function. |
| * |
| * Return value: %TRUE if media clip is embedded, %FALSE otherwise |
| * |
| * Since: 0.14 |
| */ |
| gboolean |
| poppler_media_is_embedded (PopplerMedia *poppler_media) |
| { |
| g_return_val_if_fail (POPPLER_IS_MEDIA (poppler_media), FALSE); |
| |
| return poppler_media->stream.isStream(); |
| } |
| |
| /** |
| * poppler_media_get_mime_type: |
| * @poppler_media: a #PopplerMedia |
| * |
| * Returns the media clip mime-type |
| * |
| * Return value: the mime-type, return value is owned by #PopplerMedia and should not be freed |
| * |
| * Since: 0.14 |
| */ |
| const gchar * |
| poppler_media_get_mime_type (PopplerMedia *poppler_media) |
| { |
| g_return_val_if_fail (POPPLER_IS_MEDIA (poppler_media), NULL); |
| |
| return poppler_media->mime_type; |
| } |
| |
| static gboolean |
| save_helper (const gchar *buf, |
| gsize count, |
| gpointer data, |
| GError **error) |
| { |
| FILE *f = (FILE *) data; |
| gsize n; |
| |
| n = fwrite (buf, 1, count, f); |
| if (n != count) |
| { |
| g_set_error (error, |
| G_FILE_ERROR, |
| g_file_error_from_errno (errno), |
| "Error writing to media file: %s", |
| g_strerror (errno)); |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| /** |
| * poppler_media_save: |
| * @poppler_media: a #PopplerMedia |
| * @filename: name of file to save |
| * @error: (allow-none): return location for error, or %NULL. |
| * |
| * Saves embedded stream of @poppler_media to a file indicated by @filename. |
| * If @error is set, %FALSE will be returned. |
| * Possible errors include those in the #G_FILE_ERROR domain |
| * and whatever the save function generates. |
| * |
| * Return value: %TRUE, if the file successfully saved |
| * |
| * Since: 0.14 |
| */ |
| gboolean |
| poppler_media_save (PopplerMedia *poppler_media, |
| const char *filename, |
| GError **error) |
| { |
| gboolean result; |
| FILE *f; |
| |
| g_return_val_if_fail (POPPLER_IS_MEDIA (poppler_media), FALSE); |
| g_return_val_if_fail (poppler_media->stream.isStream(), FALSE); |
| |
| f = g_fopen (filename, "wb"); |
| |
| if (f == nullptr) |
| { |
| gchar *display_name = g_filename_display_name (filename); |
| g_set_error (error, |
| G_FILE_ERROR, |
| g_file_error_from_errno (errno), |
| "Failed to open '%s' for writing: %s", |
| display_name, |
| g_strerror (errno)); |
| g_free (display_name); |
| return FALSE; |
| } |
| |
| result = poppler_media_save_to_callback (poppler_media, save_helper, f, error); |
| |
| if (fclose (f) < 0) |
| { |
| gchar *display_name = g_filename_display_name (filename); |
| g_set_error (error, |
| G_FILE_ERROR, |
| g_file_error_from_errno (errno), |
| "Failed to close '%s', all data may not have been saved: %s", |
| display_name, |
| g_strerror (errno)); |
| g_free (display_name); |
| return FALSE; |
| } |
| |
| return result; |
| } |
| |
| #define BUF_SIZE 1024 |
| |
| /** |
| * poppler_media_save_to_callback: |
| * @poppler_media: a #PopplerMedia |
| * @save_func: (scope call): a function that is called to save each block of data that the save routine generates. |
| * @user_data: user data to pass to the save function. |
| * @error: (allow-none): return location for error, or %NULL. |
| * |
| * Saves embedded stream of @poppler_media by feeding the produced data to @save_func. Can be used |
| * when you want to store the media clip stream to something other than a file, such as |
| * an in-memory buffer or a socket. If @error is set, %FALSE will be |
| * returned. Possible errors include those in the #G_FILE_ERROR domain and |
| * whatever the save function generates. |
| * |
| * Return value: %TRUE, if the save successfully completed |
| * |
| * Since: 0.14 |
| */ |
| gboolean |
| poppler_media_save_to_callback (PopplerMedia *poppler_media, |
| PopplerMediaSaveFunc save_func, |
| gpointer user_data, |
| GError **error) |
| { |
| Stream *stream; |
| gchar buf[BUF_SIZE]; |
| int i; |
| gboolean eof_reached = FALSE; |
| |
| g_return_val_if_fail (POPPLER_IS_MEDIA (poppler_media), FALSE); |
| g_return_val_if_fail (poppler_media->stream.isStream(), FALSE); |
| |
| stream = poppler_media->stream.getStream(); |
| stream->reset(); |
| |
| do |
| { |
| int data; |
| |
| for (i = 0; i < BUF_SIZE; i++) |
| { |
| data = stream->getChar (); |
| if (data == EOF) |
| { |
| eof_reached = TRUE; |
| break; |
| } |
| buf[i] = data; |
| } |
| |
| if (i > 0) |
| { |
| if (! (save_func) (buf, i, user_data, error)) |
| { |
| stream->close (); |
| return FALSE; |
| } |
| } |
| } |
| while (! eof_reached); |
| |
| stream->close (); |
| |
| return TRUE; |
| } |