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Current File : //usr/share/emscripten/tests/poppler/glib/poppler-media.cc
/* 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;
Stream *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 = NULL;
}
if (media->mime_type) {
g_free (media->mime_type);
media->mime_type = NULL;
}
if (media->stream) {
media->stream->decRef();
media->stream = NULL;
}
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 (MediaRendition *poppler_media)
{
PopplerMedia *media;
g_assert (poppler_media != NULL);
media = POPPLER_MEDIA (g_object_new (POPPLER_TYPE_MEDIA, NULL));
if (poppler_media->getIsEmbedded()) {
GooString* mime_type;
media->stream = poppler_media->getEmbbededStream();
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 == NULL, 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_file_name() 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 != NULL;
}
/**
* 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 != NULL, FALSE);
f = g_fopen (filename, "wb");
if (f == NULL)
{
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 != NULL, FALSE);
stream = poppler_media->stream;
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;
}
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