3 * Copyright (C) 2007 Rene Stadler <mail@renestadler.de>
4 * Copyright (C) 2007-2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
26 #include "gstgiobasesrc.h"
28 #include <gst/base/gsttypefindhelper.h>
30 GST_DEBUG_CATEGORY_STATIC (gst_gio_base_src_debug);
31 #define GST_CAT_DEFAULT gst_gio_base_src_debug
33 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
38 GST_BOILERPLATE (GstGioBaseSrc, gst_gio_base_src, GstBaseSrc,
41 static void gst_gio_base_src_finalize (GObject * object);
43 static gboolean gst_gio_base_src_start (GstBaseSrc * base_src);
44 static gboolean gst_gio_base_src_stop (GstBaseSrc * base_src);
45 static gboolean gst_gio_base_src_get_size (GstBaseSrc * base_src,
47 static gboolean gst_gio_base_src_is_seekable (GstBaseSrc * base_src);
48 static gboolean gst_gio_base_src_unlock (GstBaseSrc * base_src);
49 static gboolean gst_gio_base_src_unlock_stop (GstBaseSrc * base_src);
50 static gboolean gst_gio_base_src_check_get_range (GstBaseSrc * base_src);
51 static GstFlowReturn gst_gio_base_src_create (GstBaseSrc * base_src,
52 guint64 offset, guint size, GstBuffer ** buf);
53 static gboolean gst_gio_base_src_query (GstBaseSrc * base_src,
57 gst_gio_base_src_base_init (gpointer gclass)
59 GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
61 GST_DEBUG_CATEGORY_INIT (gst_gio_base_src_debug, "gio_base_src", 0,
64 gst_element_class_add_static_pad_template (element_class, &src_factory);
68 gst_gio_base_src_class_init (GstGioBaseSrcClass * klass)
70 GObjectClass *gobject_class = (GObjectClass *) klass;
71 GstBaseSrcClass *gstbasesrc_class = (GstBaseSrcClass *) klass;
73 gobject_class->finalize = gst_gio_base_src_finalize;
75 gstbasesrc_class->start = GST_DEBUG_FUNCPTR (gst_gio_base_src_start);
76 gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (gst_gio_base_src_stop);
77 gstbasesrc_class->get_size = GST_DEBUG_FUNCPTR (gst_gio_base_src_get_size);
78 gstbasesrc_class->is_seekable =
79 GST_DEBUG_FUNCPTR (gst_gio_base_src_is_seekable);
80 gstbasesrc_class->unlock = GST_DEBUG_FUNCPTR (gst_gio_base_src_unlock);
81 gstbasesrc_class->unlock_stop =
82 GST_DEBUG_FUNCPTR (gst_gio_base_src_unlock_stop);
83 gstbasesrc_class->check_get_range =
84 GST_DEBUG_FUNCPTR (gst_gio_base_src_check_get_range);
85 gstbasesrc_class->create = GST_DEBUG_FUNCPTR (gst_gio_base_src_create);
86 gstbasesrc_class->query = GST_DEBUG_FUNCPTR (gst_gio_base_src_query);
90 gst_gio_base_src_init (GstGioBaseSrc * src, GstGioBaseSrcClass * gclass)
92 src->cancel = g_cancellable_new ();
96 gst_gio_base_src_finalize (GObject * object)
98 GstGioBaseSrc *src = GST_GIO_BASE_SRC (object);
101 g_object_unref (src->cancel);
106 g_object_unref (src->stream);
111 gst_buffer_unref (src->cache);
115 GST_CALL_PARENT (G_OBJECT_CLASS, finalize, (object));
119 gst_gio_base_src_start (GstBaseSrc * base_src)
121 GstGioBaseSrc *src = GST_GIO_BASE_SRC (base_src);
122 GstGioBaseSrcClass *gbsrc_class = GST_GIO_BASE_SRC_GET_CLASS (src);
126 /* FIXME: This will likely block */
127 src->stream = gbsrc_class->get_stream (src);
128 if (G_UNLIKELY (!G_IS_INPUT_STREAM (src->stream))) {
129 GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
130 ("No input stream provided by subclass"));
132 } else if (G_UNLIKELY (g_input_stream_is_closed (src->stream))) {
133 GST_ELEMENT_ERROR (src, LIBRARY, FAILED, (NULL),
134 ("Input stream is already closed"));
138 if (G_IS_SEEKABLE (src->stream))
139 src->position = g_seekable_tell (G_SEEKABLE (src->stream));
141 GST_DEBUG_OBJECT (src, "started source");
147 gst_gio_base_src_stop (GstBaseSrc * base_src)
149 GstGioBaseSrc *src = GST_GIO_BASE_SRC (base_src);
150 GstGioBaseSrcClass *klass = GST_GIO_BASE_SRC_GET_CLASS (src);
154 if (klass->close_on_stop && G_IS_INPUT_STREAM (src->stream)) {
155 GST_DEBUG_OBJECT (src, "closing stream");
157 /* FIXME: can block but unfortunately we can't use async operations
158 * here because they require a running main loop */
159 success = g_input_stream_close (src->stream, src->cancel, &err);
161 if (!success && !gst_gio_error (src, "g_input_stream_close", &err, NULL)) {
162 GST_ELEMENT_WARNING (src, RESOURCE, CLOSE, (NULL),
163 ("g_input_stream_close failed: %s", err->message));
164 g_clear_error (&err);
165 } else if (!success) {
166 GST_ELEMENT_WARNING (src, RESOURCE, CLOSE, (NULL),
167 ("g_input_stream_close failed"));
169 GST_DEBUG_OBJECT (src, "g_input_stream_close succeeded");
172 g_object_unref (src->stream);
175 g_object_unref (src->stream);
183 gst_gio_base_src_get_size (GstBaseSrc * base_src, guint64 * size)
185 GstGioBaseSrc *src = GST_GIO_BASE_SRC (base_src);
187 if (G_IS_FILE_INPUT_STREAM (src->stream)) {
191 info = g_file_input_stream_query_info (G_FILE_INPUT_STREAM (src->stream),
192 G_FILE_ATTRIBUTE_STANDARD_SIZE, src->cancel, &err);
195 *size = g_file_info_get_size (info);
196 g_object_unref (info);
197 GST_DEBUG_OBJECT (src, "found size: %" G_GUINT64_FORMAT, *size);
201 if (!gst_gio_error (src, "g_file_input_stream_query_info", &err, NULL)) {
203 if (GST_GIO_ERROR_MATCHES (err, NOT_SUPPORTED))
204 GST_DEBUG_OBJECT (src, "size information not available");
206 GST_WARNING_OBJECT (src, "size information retrieval failed: %s",
209 g_clear_error (&err);
213 if (GST_GIO_STREAM_IS_SEEKABLE (src->stream)) {
217 GSeekable *seekable = G_SEEKABLE (src->stream);
220 old = g_seekable_tell (seekable);
222 ret = g_seekable_seek (seekable, 0, G_SEEK_END, src->cancel, &err);
224 if (!gst_gio_error (src, "g_seekable_seek", &err, NULL)) {
225 if (GST_GIO_ERROR_MATCHES (err, NOT_SUPPORTED))
226 GST_DEBUG_OBJECT (src,
227 "Seeking to the end of stream is not supported");
229 GST_WARNING_OBJECT (src, "Seeking to end of stream failed: %s",
231 g_clear_error (&err);
233 GST_WARNING_OBJECT (src, "Seeking to end of stream failed");
238 stream_size = g_seekable_tell (seekable);
240 ret = g_seekable_seek (seekable, old, G_SEEK_SET, src->cancel, &err);
242 if (!gst_gio_error (src, "g_seekable_seek", &err, NULL)) {
243 if (GST_GIO_ERROR_MATCHES (err, NOT_SUPPORTED))
244 GST_ERROR_OBJECT (src, "Seeking to the old position not supported");
246 GST_ERROR_OBJECT (src, "Seeking to the old position failed: %s",
248 g_clear_error (&err);
250 GST_ERROR_OBJECT (src, "Seeking to the old position faile");
255 if (stream_size >= 0) {
265 gst_gio_base_src_is_seekable (GstBaseSrc * base_src)
267 GstGioBaseSrc *src = GST_GIO_BASE_SRC (base_src);
270 seekable = GST_GIO_STREAM_IS_SEEKABLE (src->stream);
272 GST_DEBUG_OBJECT (src, "can seek: %d", seekable);
278 gst_gio_base_src_unlock (GstBaseSrc * base_src)
280 GstGioBaseSrc *src = GST_GIO_BASE_SRC (base_src);
282 GST_LOG_OBJECT (src, "triggering cancellation");
284 g_cancellable_cancel (src->cancel);
290 gst_gio_base_src_unlock_stop (GstBaseSrc * base_src)
292 GstGioBaseSrc *src = GST_GIO_BASE_SRC (base_src);
294 GST_LOG_OBJECT (src, "resetting cancellable");
296 g_cancellable_reset (src->cancel);
302 gst_gio_base_src_check_get_range (GstBaseSrc * base_src)
304 return GST_CALL_PARENT_WITH_DEFAULT (GST_BASE_SRC_CLASS,
305 check_get_range, (base_src), FALSE);
309 gst_gio_base_src_create (GstBaseSrc * base_src, guint64 offset, guint size,
310 GstBuffer ** buf_return)
312 GstGioBaseSrc *src = GST_GIO_BASE_SRC (base_src);
314 GstFlowReturn ret = GST_FLOW_OK;
316 g_return_val_if_fail (G_IS_INPUT_STREAM (src->stream), GST_FLOW_ERROR);
318 /* If we have the requested part in our cache take a subbuffer of that,
319 * otherwise fill the cache again with at least 4096 bytes from the
320 * requested offset and return a subbuffer of that.
322 * We need caching because every read/seek operation will need to go
323 * over DBus if our backend is GVfs and this is painfully slow. */
324 if (src->cache && offset >= GST_BUFFER_OFFSET (src->cache) &&
325 offset + size <= GST_BUFFER_OFFSET_END (src->cache)) {
326 GST_DEBUG_OBJECT (src, "Creating subbuffer from cached buffer: offset %"
327 G_GUINT64_FORMAT " length %u", offset, size);
329 buf = gst_buffer_create_sub (src->cache,
330 offset - GST_BUFFER_OFFSET (src->cache), size);
332 GST_BUFFER_OFFSET (buf) = offset;
333 GST_BUFFER_OFFSET_END (buf) = offset + size;
334 GST_BUFFER_SIZE (buf) = size;
336 guint cachesize = MAX (4096, size);
338 gboolean success, eos;
342 gst_buffer_unref (src->cache);
346 if (G_UNLIKELY (offset != src->position)) {
347 if (!GST_GIO_STREAM_IS_SEEKABLE (src->stream))
348 return GST_FLOW_NOT_SUPPORTED;
350 GST_DEBUG_OBJECT (src, "Seeking to position %" G_GUINT64_FORMAT, offset);
351 ret = gst_gio_seek (src, G_SEEKABLE (src->stream), offset, src->cancel);
353 if (ret == GST_FLOW_OK)
354 src->position = offset;
359 src->cache = gst_buffer_try_new_and_alloc (cachesize);
360 if (G_UNLIKELY (src->cache == NULL)) {
361 GST_ERROR_OBJECT (src, "Failed to allocate %u bytes", cachesize);
362 return GST_FLOW_ERROR;
365 GST_LOG_OBJECT (src, "Reading %u bytes from offset %" G_GUINT64_FORMAT,
368 /* GIO sometimes gives less bytes than requested although
369 * it's not at the end of file. SMB for example only
370 * supports reads up to 64k. So we loop here until we get at
371 * at least the requested amount of bytes or a read returns
374 while (size - read > 0 && (res =
375 g_input_stream_read (G_INPUT_STREAM (src->stream),
376 GST_BUFFER_DATA (src->cache) + read, cachesize - read,
377 src->cancel, &err)) > 0) {
381 success = (read >= 0);
382 eos = (cachesize > 0 && read == 0);
384 if (!success && !gst_gio_error (src, "g_input_stream_read", &err, &ret)) {
385 GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
386 ("Could not read from stream: %s", err->message));
387 g_clear_error (&err);
390 if (success && !eos) {
391 src->position += read;
392 GST_BUFFER_SIZE (src->cache) = read;
394 GST_BUFFER_OFFSET (src->cache) = offset;
395 GST_BUFFER_OFFSET_END (src->cache) = offset + read;
397 GST_DEBUG_OBJECT (src, "Read successful");
398 GST_DEBUG_OBJECT (src, "Creating subbuffer from new "
399 "cached buffer: offset %" G_GUINT64_FORMAT " length %u", offset,
402 buf = gst_buffer_create_sub (src->cache, 0, MIN (size, read));
404 GST_BUFFER_OFFSET (buf) = offset;
405 GST_BUFFER_OFFSET_END (buf) = offset + MIN (size, read);
406 GST_BUFFER_SIZE (buf) = MIN (size, read);
408 GST_DEBUG_OBJECT (src, "Read not successful");
409 gst_buffer_unref (src->cache);
415 ret = GST_FLOW_UNEXPECTED;
424 gst_gio_base_src_query (GstBaseSrc * base_src, GstQuery * query)
426 gboolean ret = FALSE;
427 GstGioBaseSrc *src = GST_GIO_BASE_SRC (base_src);
429 switch (GST_QUERY_TYPE (query)) {
431 if (GST_IS_URI_HANDLER (src)) {
432 const gchar *uri = gst_uri_handler_get_uri (GST_URI_HANDLER (src));
433 gst_query_set_uri (query, uri);
443 ret = GST_BASE_SRC_CLASS (parent_class)->query (base_src, query);