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filesink: Remove buffer, deprecate line-buffer mode and don't use fflush()

Browse source 
fflush() has no effect because we use writev() directly, so fsync()
should be used instead which is actually flushing the kernel-side
buffers.

As a next step, a non-line-buffered buffering mode is to be added.

https://bugzilla.gnome.org/show_bug.cgi?id=794173
This commit is contained in:
Sebastian Dröge 2018-08-14 10:58:26 +03:00
parent 49d212e908
commit e975e0cae8
2 changed files with 6 additions and 61 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

66
plugins/elements/gstfilesink.c
View file

@ -86,7 +86,8 @@ gst_file_sink_buffer_mode_get_type (void)
static const GEnumValue buffer_mode[] = {
{GST_FILE_SINK_BUFFER_MODE_DEFAULT, "Default buffering", "default"},
{GST_FILE_SINK_BUFFER_MODE_FULL, "Fully buffered", "full"},
{GST_FILE_SINK_BUFFER_MODE_LINE, "Line buffered", "line"},
{GST_FILE_SINK_BUFFER_MODE_LINE, "Line buffered (deprecated, like full)",
"line"},
{GST_FILE_SINK_BUFFER_MODE_UNBUFFERED, "Unbuffered", "unbuffered"},
{0, NULL, NULL},
};
@ -255,7 +256,6 @@ gst_file_sink_init (GstFileSink * filesink)
filesink->current_pos = 0;
filesink->buffer_mode = DEFAULT_BUFFER_MODE;
filesink->buffer_size = DEFAULT_BUFFER_SIZE;
filesink->buffer = NULL;
filesink->append = FALSE;
gst_base_sink_set_sync (GST_BASE_SINK (filesink), FALSE);
@ -272,9 +272,6 @@ gst_file_sink_dispose (GObject * object)
sink->uri = NULL;
g_free (sink->filename);
sink->filename = NULL;
g_free (sink->buffer);
sink->buffer = NULL;
sink->buffer_size = 0;
}
static gboolean
@ -365,8 +362,6 @@ gst_file_sink_get_property (GObject * object, guint prop_id, GValue * value,
static gboolean
gst_file_sink_open_file (GstFileSink * sink)
{
gint mode;
/* open the file */
if (sink->filename == NULL || sink->filename[0] == '\0')
goto no_filename;
@ -378,36 +373,6 @@ gst_file_sink_open_file (GstFileSink * sink)
if (sink->file == NULL)
goto open_failed;
/* see if we are asked to perform a specific kind of buffering */
if ((mode = sink->buffer_mode) != -1) {
guint buffer_size;
/* free previous buffer if any */
g_free (sink->buffer);
if (mode == _IONBF) {
/* no buffering */
sink->buffer = NULL;
buffer_size = 0;
} else {
/* allocate buffer */
sink->buffer = g_malloc (sink->buffer_size);
buffer_size = sink->buffer_size;
}
/* Cygwin does not have __fbufsize, android adds it in API 23 */
#if defined(HAVE_STDIO_EXT_H) && (!defined(__CYGWIN__) && (!defined(__ANDROID_API__) || __ANDROID_API__ >= 23))
GST_DEBUG_OBJECT (sink, "change buffer size %u to %u, mode %d",
(guint) __fbufsize (sink->file), buffer_size, mode);
#else
GST_DEBUG_OBJECT (sink, "change buffer size to %u, mode %d",
sink->buffer_size, mode);
#endif
if (setvbuf (sink->file, sink->buffer, mode, buffer_size) != 0) {
GST_WARNING_OBJECT (sink, "warning: setvbuf failed: %s",
g_strerror (errno));
}
}
sink->current_pos = 0;
/* try to seek in the file to figure out if it is seekable */
sink->seekable = gst_file_sink_do_seek (sink, 0);
@ -443,9 +408,6 @@ gst_file_sink_close_file (GstFileSink * sink)
GST_DEBUG_OBJECT (sink, "closed file");
sink->file = NULL;
g_free (sink->buffer);
sink->buffer = NULL;
}
}
@ -515,9 +477,6 @@ gst_file_sink_do_seek (GstFileSink * filesink, guint64 new_offset)
GST_DEBUG_OBJECT (filesink, "Seeking to offset %" G_GUINT64_FORMAT
" using " __GST_STDIO_SEEK_FUNCTION, new_offset);
if (fflush (filesink->file))
goto flush_failed;
#ifdef HAVE_FSEEKO
if (fseeko (filesink->file, (off_t) new_offset, SEEK_SET) != 0)
goto seek_failed;
@ -537,11 +496,6 @@ gst_file_sink_do_seek (GstFileSink * filesink, guint64 new_offset)
return TRUE;
/* ERRORS */
flush_failed:
{
GST_DEBUG_OBJECT (filesink, "Flush failed: %s", g_strerror (errno));
return FALSE;
}
seek_failed:
{
GST_DEBUG_OBJECT (filesink, "Seeking failed: %s", g_strerror (errno));
@ -591,13 +545,9 @@ gst_file_sink_event (GstBaseSink * sink, GstEvent * event)
if (filesink->current_pos != 0 && filesink->seekable) {
gst_file_sink_do_seek (filesink, 0);
if (ftruncate (fileno (filesink->file), 0))
goto flush_failed;
goto truncate_failed;
}
break;
case GST_EVENT_EOS:
if (fflush (filesink->file))
goto flush_failed;
break;
default:
break;
}
@ -613,7 +563,7 @@ seek_failed:
gst_event_unref (event);
return FALSE;
}
flush_failed:
truncate_failed:
{
GST_ELEMENT_ERROR (filesink, RESOURCE, WRITE,
(_("Error while writing to file \"%s\"."), filesink->filename),
@ -631,10 +581,6 @@ gst_file_sink_get_current_offset (GstFileSink * filesink, guint64 * p_pos)
#ifdef HAVE_FTELLO
ret = ftello (filesink->file);
#elif defined (G_OS_UNIX) || defined (G_OS_WIN32)
if (fflush (filesink->file)) {
GST_DEBUG_OBJECT (filesink, "Flush failed: %s", g_strerror (errno));
/* ignore and continue */
}
ret = lseek (fileno (filesink->file), 0, SEEK_CUR);
#else
ret = (off_t) ftell (filesink->file);
@ -691,7 +637,7 @@ gst_file_sink_render_list (GstBaseSink * bsink, GstBufferList * buffer_list)
total_mems);
if (flow == GST_FLOW_OK && sync_after) {
if (fflush (sink->file) || fsync (fileno (sink->file))) {
if (fsync (fileno (sink->file))) {
GST_ELEMENT_ERROR (sink, RESOURCE, WRITE,
(_("Error while writing to file \"%s\"."), sink->filename),
("%s", g_strerror (errno)));
@ -726,7 +672,7 @@ gst_file_sink_render (GstBaseSink * sink, GstBuffer * buffer)
if (flow == GST_FLOW_OK &&
GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_SYNC_AFTER)) {
if (fflush (filesink->file) || fsync (fileno (filesink->file))) {
if (fsync (fileno (filesink->file))) {
GST_ELEMENT_ERROR (filesink, RESOURCE, WRITE,
(_("Error while writing to file \"%s\"."), filesink->filename),
("%s", g_strerror (errno)));

1
plugins/elements/gstfilesink.h
View file

@ -80,7 +80,6 @@ struct _GstFileSink {
gint buffer_mode;
guint buffer_size;
gchar *buffer;
gboolean append;
};