2 * Copyright (C) 2014 Wim Taymans <wim.taymans@gmail.com>
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., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
23 * SECTION:element-downloadbuffer
25 * The downloadbuffer element provides on-disk buffering and caching of, typically,
26 * a network file. temp-template should be set to a value such as
27 * /tmp/gstreamer-XXXXXX and the element will allocate a random free filename and
28 * buffer the data in the file.
30 * With max-size-bytes and max-size-time you can configure the buffering limits.
31 * The downloadbuffer element will try to read-ahead these amounts of data. When
32 * the amount of read-ahead data drops below low-percent of the configured max,
33 * the element will start emitting BUFFERING messages until high-percent of max is
36 * The downloadbuffer provides push and pull based scheduling on its source pad
37 * and will efficiently seek in the upstream element when needed.
39 * The temp-location property will be used to notify the application of the
42 * When the downloadbuffer has completely downloaded the media, it will
43 * post an application message named <classname>"GstCacheDownloadComplete"</classname>
44 * with the following information:
49 * <classname>"location"</classname>:
50 * the location of the completely downloaded file.
60 #include "gstdownloadbuffer.h"
62 #include <glib/gstdio.h>
64 #include "gst/gst-i18n-lib.h"
65 #include "gst/glib-compat-private.h"
70 #include <io.h> /* lseek, open, close, read */
72 #define lseek _lseeki64
81 static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
86 static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
91 GST_DEBUG_CATEGORY_STATIC (downloadbuffer_debug);
92 #define GST_CAT_DEFAULT (downloadbuffer_debug)
100 #define DEFAULT_BUFFER_SIZE 4096
102 /* default property values */
103 #define DEFAULT_MAX_SIZE_BYTES (2 * 1024 * 1024) /* 2 MB */
104 #define DEFAULT_MAX_SIZE_TIME 2 * GST_SECOND /* 2 seconds */
105 #define DEFAULT_LOW_PERCENT 10
106 #define DEFAULT_HIGH_PERCENT 99
107 #define DEFAULT_TEMP_REMOVE TRUE
122 #define GST_DOWNLOAD_BUFFER_CLEAR_LEVEL(l) G_STMT_START { \
127 #define STATUS(elem, pad, msg) \
128 GST_LOG_OBJECT (elem, "(%s:%s) " msg ": %u of %u " \
129 "bytes, %" G_GUINT64_FORMAT " of %" G_GUINT64_FORMAT \
131 GST_DEBUG_PAD_NAME (pad), \
132 elem->cur_level.bytes, \
133 elem->max_level.bytes, \
134 elem->cur_level.time, \
135 elem->max_level.time)
137 #define GST_DOWNLOAD_BUFFER_MUTEX_LOCK(q) G_STMT_START { \
138 g_mutex_lock (&q->qlock); \
141 #define GST_DOWNLOAD_BUFFER_MUTEX_LOCK_CHECK(q,res,label) G_STMT_START { \
142 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (q); \
143 if (res != GST_FLOW_OK) \
147 #define GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK(q) G_STMT_START { \
148 g_mutex_unlock (&q->qlock); \
151 #define GST_DOWNLOAD_BUFFER_WAIT_ADD_CHECK(q, res, o, label) G_STMT_START { \
152 STATUS (q, q->srcpad, "wait for ADD"); \
153 q->waiting_add = TRUE; \
154 q->waiting_offset = o; \
155 g_cond_wait (&q->item_add, &q->qlock); \
156 q->waiting_add = FALSE; \
157 if (res != GST_FLOW_OK) { \
158 STATUS (q, q->srcpad, "received ADD wakeup"); \
161 STATUS (q, q->srcpad, "received ADD"); \
164 #define GST_DOWNLOAD_BUFFER_SIGNAL_ADD(q, o) G_STMT_START { \
165 if (q->waiting_add && q->waiting_offset <= o) { \
166 STATUS (q, q->sinkpad, "signal ADD"); \
167 g_cond_signal (&q->item_add); \
172 GST_DEBUG_CATEGORY_INIT (downloadbuffer_debug, "downloadbuffer", 0, \
173 "downloadbuffer element");
175 #define gst_download_buffer_parent_class parent_class
176 G_DEFINE_TYPE_WITH_CODE (GstDownloadBuffer, gst_download_buffer,
177 GST_TYPE_ELEMENT, _do_init);
179 static GstMessage *update_buffering (GstDownloadBuffer * dlbuf);
181 static void gst_download_buffer_finalize (GObject * object);
183 static void gst_download_buffer_set_property (GObject * object,
184 guint prop_id, const GValue * value, GParamSpec * pspec);
185 static void gst_download_buffer_get_property (GObject * object,
186 guint prop_id, GValue * value, GParamSpec * pspec);
188 static GstFlowReturn gst_download_buffer_chain (GstPad * pad,
189 GstObject * parent, GstBuffer * buffer);
190 static void gst_download_buffer_loop (GstPad * pad);
192 static gboolean gst_download_buffer_handle_sink_event (GstPad * pad,
193 GstObject * parent, GstEvent * event);
194 static gboolean gst_download_buffer_handle_sink_query (GstPad * pad,
195 GstObject * parent, GstQuery * query);
197 static gboolean gst_download_buffer_handle_src_event (GstPad * pad,
198 GstObject * parent, GstEvent * event);
199 static gboolean gst_download_buffer_handle_src_query (GstPad * pad,
200 GstObject * parent, GstQuery * query);
201 static gboolean gst_download_buffer_handle_query (GstElement * element,
204 static GstFlowReturn gst_download_buffer_get_range (GstPad * pad,
205 GstObject * parent, guint64 offset, guint length, GstBuffer ** buffer);
207 static gboolean gst_download_buffer_src_activate_mode (GstPad * pad,
208 GstObject * parent, GstPadMode mode, gboolean active);
209 static gboolean gst_download_buffer_sink_activate_mode (GstPad * pad,
210 GstObject * parent, GstPadMode mode, gboolean active);
211 static GstStateChangeReturn gst_download_buffer_change_state (GstElement *
212 element, GstStateChange transition);
214 /* static guint gst_download_buffer_signals[LAST_SIGNAL] = { 0 }; */
217 gst_download_buffer_class_init (GstDownloadBufferClass * klass)
219 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
220 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
222 gobject_class->set_property = gst_download_buffer_set_property;
223 gobject_class->get_property = gst_download_buffer_get_property;
226 g_object_class_install_property (gobject_class, PROP_MAX_SIZE_BYTES,
227 g_param_spec_uint ("max-size-bytes", "Max. size (kB)",
228 "Max. amount of data to buffer (bytes, 0=disable)",
229 0, G_MAXUINT, DEFAULT_MAX_SIZE_BYTES,
230 G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
231 G_PARAM_STATIC_STRINGS));
232 g_object_class_install_property (gobject_class, PROP_MAX_SIZE_TIME,
233 g_param_spec_uint64 ("max-size-time", "Max. size (ns)",
234 "Max. amount of data to buffer (in ns, 0=disable)", 0, G_MAXUINT64,
235 DEFAULT_MAX_SIZE_TIME, G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
236 G_PARAM_STATIC_STRINGS));
238 g_object_class_install_property (gobject_class, PROP_LOW_PERCENT,
239 g_param_spec_int ("low-percent", "Low percent",
240 "Low threshold for buffering to start. Only used if use-buffering is True",
241 0, 100, DEFAULT_LOW_PERCENT,
242 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
243 g_object_class_install_property (gobject_class, PROP_HIGH_PERCENT,
244 g_param_spec_int ("high-percent", "High percent",
245 "High threshold for buffering to finish. Only used if use-buffering is True",
246 0, 100, DEFAULT_HIGH_PERCENT,
247 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
249 g_object_class_install_property (gobject_class, PROP_TEMP_TEMPLATE,
250 g_param_spec_string ("temp-template", "Temporary File Template",
251 "File template to store temporary files in, should contain directory "
252 "and XXXXXX. (NULL == disabled)",
253 NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
255 g_object_class_install_property (gobject_class, PROP_TEMP_LOCATION,
256 g_param_spec_string ("temp-location", "Temporary File Location",
257 "Location to store temporary files in (Only read this property, "
258 "use temp-template to configure the name template)",
259 NULL, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
262 * GstDownloadBuffer:temp-remove
264 * When temp-template is set, remove the temporary file when going to READY.
266 g_object_class_install_property (gobject_class, PROP_TEMP_REMOVE,
267 g_param_spec_boolean ("temp-remove", "Remove the Temporary File",
268 "Remove the temp-location after use",
269 DEFAULT_TEMP_REMOVE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
271 /* set several parent class virtual functions */
272 gobject_class->finalize = gst_download_buffer_finalize;
274 gst_element_class_add_static_pad_template (gstelement_class, &srctemplate);
275 gst_element_class_add_static_pad_template (gstelement_class, &sinktemplate);
277 gst_element_class_set_static_metadata (gstelement_class, "DownloadBuffer",
278 "Generic", "Download Buffer element",
279 "Wim Taymans <wim.taymans@gmail.com>");
281 gstelement_class->change_state =
282 GST_DEBUG_FUNCPTR (gst_download_buffer_change_state);
283 gstelement_class->query =
284 GST_DEBUG_FUNCPTR (gst_download_buffer_handle_query);
288 gst_download_buffer_init (GstDownloadBuffer * dlbuf)
290 dlbuf->sinkpad = gst_pad_new_from_static_template (&sinktemplate, "sink");
292 gst_pad_set_chain_function (dlbuf->sinkpad,
293 GST_DEBUG_FUNCPTR (gst_download_buffer_chain));
294 gst_pad_set_activatemode_function (dlbuf->sinkpad,
295 GST_DEBUG_FUNCPTR (gst_download_buffer_sink_activate_mode));
296 gst_pad_set_event_function (dlbuf->sinkpad,
297 GST_DEBUG_FUNCPTR (gst_download_buffer_handle_sink_event));
298 gst_pad_set_query_function (dlbuf->sinkpad,
299 GST_DEBUG_FUNCPTR (gst_download_buffer_handle_sink_query));
300 GST_PAD_SET_PROXY_CAPS (dlbuf->sinkpad);
301 gst_element_add_pad (GST_ELEMENT (dlbuf), dlbuf->sinkpad);
303 dlbuf->srcpad = gst_pad_new_from_static_template (&srctemplate, "src");
305 gst_pad_set_activatemode_function (dlbuf->srcpad,
306 GST_DEBUG_FUNCPTR (gst_download_buffer_src_activate_mode));
307 gst_pad_set_getrange_function (dlbuf->srcpad,
308 GST_DEBUG_FUNCPTR (gst_download_buffer_get_range));
309 gst_pad_set_event_function (dlbuf->srcpad,
310 GST_DEBUG_FUNCPTR (gst_download_buffer_handle_src_event));
311 gst_pad_set_query_function (dlbuf->srcpad,
312 GST_DEBUG_FUNCPTR (gst_download_buffer_handle_src_query));
313 GST_PAD_SET_PROXY_CAPS (dlbuf->srcpad);
314 gst_element_add_pad (GST_ELEMENT (dlbuf), dlbuf->srcpad);
317 GST_DOWNLOAD_BUFFER_CLEAR_LEVEL (dlbuf->cur_level);
318 dlbuf->max_level.bytes = DEFAULT_MAX_SIZE_BYTES;
319 dlbuf->max_level.time = DEFAULT_MAX_SIZE_TIME;
320 dlbuf->low_percent = DEFAULT_LOW_PERCENT;
321 dlbuf->high_percent = DEFAULT_HIGH_PERCENT;
323 dlbuf->srcresult = GST_FLOW_FLUSHING;
324 dlbuf->sinkresult = GST_FLOW_FLUSHING;
325 dlbuf->in_timer = g_timer_new ();
326 dlbuf->out_timer = g_timer_new ();
328 g_mutex_init (&dlbuf->qlock);
329 dlbuf->waiting_add = FALSE;
330 g_cond_init (&dlbuf->item_add);
332 /* tempfile related */
333 dlbuf->temp_template = NULL;
334 dlbuf->temp_location = NULL;
335 dlbuf->temp_remove = DEFAULT_TEMP_REMOVE;
338 /* called only once, as opposed to dispose */
340 gst_download_buffer_finalize (GObject * object)
342 GstDownloadBuffer *dlbuf = GST_DOWNLOAD_BUFFER (object);
344 g_mutex_clear (&dlbuf->qlock);
345 g_cond_clear (&dlbuf->item_add);
346 g_timer_destroy (dlbuf->in_timer);
347 g_timer_destroy (dlbuf->out_timer);
349 /* temp_file path cleanup */
350 g_free (dlbuf->temp_template);
351 g_free (dlbuf->temp_location);
353 G_OBJECT_CLASS (parent_class)->finalize (object);
357 reset_positions (GstDownloadBuffer * dlbuf)
359 dlbuf->write_pos = 0;
361 dlbuf->filling = TRUE;
362 dlbuf->buffering_percent = 0;
363 dlbuf->is_buffering = TRUE;
364 dlbuf->seeking = FALSE;
365 GST_DOWNLOAD_BUFFER_CLEAR_LEVEL (dlbuf->cur_level);
369 reset_rate_timer (GstDownloadBuffer * dlbuf)
372 dlbuf->bytes_out = 0;
373 dlbuf->byte_in_rate = 0.0;
374 dlbuf->byte_in_period = 0;
375 dlbuf->byte_out_rate = 0.0;
376 dlbuf->last_in_elapsed = 0.0;
377 dlbuf->last_out_elapsed = 0.0;
378 dlbuf->in_timer_started = FALSE;
379 dlbuf->out_timer_started = FALSE;
382 /* the interval in seconds to recalculate the rate */
383 #define RATE_INTERVAL 0.2
384 /* Tuning for rate estimation. We use a large window for the input rate because
385 * it should be stable when connected to a network. The output rate is less
386 * stable (the elements preroll, queues behind a demuxer fill, ...) and should
387 * therefore adapt more quickly.
388 * However, initial input rate may be subject to a burst, and should therefore
389 * initially also adapt more quickly to changes, and only later on give higher
390 * weight to previous values. */
391 #define AVG_IN(avg,val,w1,w2) ((avg) * (w1) + (val) * (w2)) / ((w1) + (w2))
392 #define AVG_OUT(avg,val) ((avg) * 3.0 + (val)) / 4.0
395 update_levels (GstDownloadBuffer * dlbuf, guint bytes)
397 dlbuf->cur_level.bytes = bytes;
399 if (dlbuf->byte_in_rate > 0.0) {
400 dlbuf->cur_level.time =
401 dlbuf->cur_level.bytes / dlbuf->byte_in_rate * GST_SECOND;
404 GST_DEBUG ("levels: bytes %u/%u, time %" GST_TIME_FORMAT "/%" GST_TIME_FORMAT,
405 dlbuf->cur_level.bytes, dlbuf->max_level.bytes,
406 GST_TIME_ARGS (dlbuf->cur_level.time),
407 GST_TIME_ARGS (dlbuf->max_level.time));
411 update_in_rates (GstDownloadBuffer * dlbuf)
413 gdouble elapsed, period;
414 gdouble byte_in_rate;
416 if (!dlbuf->in_timer_started) {
417 dlbuf->in_timer_started = TRUE;
418 g_timer_start (dlbuf->in_timer);
422 elapsed = g_timer_elapsed (dlbuf->in_timer, NULL);
424 /* recalc after each interval. */
425 if (dlbuf->last_in_elapsed + RATE_INTERVAL < elapsed) {
426 period = elapsed - dlbuf->last_in_elapsed;
428 GST_DEBUG_OBJECT (dlbuf,
429 "rates: period %f, in %" G_GUINT64_FORMAT ", global period %f",
430 period, dlbuf->bytes_in, dlbuf->byte_in_period);
432 byte_in_rate = dlbuf->bytes_in / period;
434 if (dlbuf->byte_in_rate == 0.0)
435 dlbuf->byte_in_rate = byte_in_rate;
437 dlbuf->byte_in_rate = AVG_IN (dlbuf->byte_in_rate, byte_in_rate,
438 (double) dlbuf->byte_in_period, period);
440 /* another data point, cap at 16 for long time running average */
441 if (dlbuf->byte_in_period < 16 * RATE_INTERVAL)
442 dlbuf->byte_in_period += period;
444 /* reset the values to calculate rate over the next interval */
445 dlbuf->last_in_elapsed = elapsed;
447 GST_DEBUG_OBJECT (dlbuf, "rates: in %f", dlbuf->byte_in_rate);
452 update_out_rates (GstDownloadBuffer * dlbuf)
454 gdouble elapsed, period;
455 gdouble byte_out_rate;
457 if (!dlbuf->out_timer_started) {
458 dlbuf->out_timer_started = TRUE;
459 g_timer_start (dlbuf->out_timer);
463 elapsed = g_timer_elapsed (dlbuf->out_timer, NULL);
465 /* recalc after each interval. */
466 if (dlbuf->last_out_elapsed + RATE_INTERVAL < elapsed) {
467 period = elapsed - dlbuf->last_out_elapsed;
469 GST_DEBUG_OBJECT (dlbuf,
470 "rates: period %f, out %" G_GUINT64_FORMAT, period, dlbuf->bytes_out);
472 byte_out_rate = dlbuf->bytes_out / period;
474 if (dlbuf->byte_out_rate == 0.0)
475 dlbuf->byte_out_rate = byte_out_rate;
477 dlbuf->byte_out_rate = AVG_OUT (dlbuf->byte_out_rate, byte_out_rate);
479 /* reset the values to calculate rate over the next interval */
480 dlbuf->last_out_elapsed = elapsed;
481 dlbuf->bytes_out = 0;
482 GST_DEBUG_OBJECT (dlbuf, "rates: out %f", dlbuf->byte_out_rate);
487 get_buffering_percent (GstDownloadBuffer * dlbuf, gboolean * is_buffering,
492 if (dlbuf->high_percent <= 0) {
496 *is_buffering = FALSE;
500 /* Ensure the variables used to calculate buffering state are up-to-date. */
501 update_in_rates (dlbuf);
502 update_out_rates (dlbuf);
504 /* figure out the percent we are filled, we take the max of all formats. */
505 if (dlbuf->max_level.bytes > 0) {
506 if (dlbuf->cur_level.bytes >= dlbuf->max_level.bytes)
509 perc = dlbuf->cur_level.bytes * 100 / dlbuf->max_level.bytes;
513 if (dlbuf->max_level.time > 0) {
514 if (dlbuf->cur_level.time >= dlbuf->max_level.time)
517 perc = MAX (perc, dlbuf->cur_level.time * 100 / dlbuf->max_level.time);
519 perc = MAX (0, perc);
522 *is_buffering = dlbuf->is_buffering;
524 /* scale to high percent so that it becomes the 100% mark */
525 perc = perc * 100 / dlbuf->high_percent;
533 GST_DEBUG_OBJECT (dlbuf, "buffering %d, percent %d", dlbuf->is_buffering,
540 get_buffering_stats (GstDownloadBuffer * dlbuf, gint percent,
541 GstBufferingMode * mode, gint * avg_in, gint * avg_out,
542 gint64 * buffering_left)
545 *mode = GST_BUFFERING_DOWNLOAD;
548 *avg_in = dlbuf->byte_in_rate;
550 *avg_out = dlbuf->byte_out_rate;
552 if (buffering_left) {
555 *buffering_left = (percent == 100 ? 0 : -1);
557 max = dlbuf->max_level.time;
558 cur = dlbuf->cur_level.time;
560 if (percent != 100 && max > cur)
561 *buffering_left = (max - cur) / 1000000;
566 update_buffering (GstDownloadBuffer * dlbuf)
569 gboolean post = FALSE;
570 GstMessage *message = NULL;
572 if (!get_buffering_percent (dlbuf, NULL, &percent))
575 if (dlbuf->is_buffering) {
577 /* if we were buffering see if we reached the high watermark */
578 if (percent >= dlbuf->high_percent)
579 dlbuf->is_buffering = FALSE;
581 /* we were not buffering, check if we need to start buffering if we drop
582 * below the low threshold */
583 if (percent < dlbuf->low_percent) {
584 dlbuf->is_buffering = TRUE;
590 if (percent == dlbuf->buffering_percent)
593 dlbuf->buffering_percent = percent;
597 GstBufferingMode mode;
598 gint avg_in, avg_out;
599 gint64 buffering_left;
601 get_buffering_stats (dlbuf, percent, &mode, &avg_in, &avg_out,
604 message = gst_message_new_buffering (GST_OBJECT_CAST (dlbuf),
606 gst_message_set_buffering_stats (message, mode,
607 avg_in, avg_out, buffering_left);
614 perform_seek_to_offset (GstDownloadBuffer * dlbuf, guint64 offset)
622 /* until we receive the FLUSH_STOP from this seek, we skip data */
623 dlbuf->seeking = TRUE;
624 dlbuf->write_pos = offset;
625 dlbuf->filling = FALSE;
626 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
628 GST_DEBUG_OBJECT (dlbuf, "Seeking to %" G_GUINT64_FORMAT, offset);
631 gst_event_new_seek (1.0, GST_FORMAT_BYTES,
632 GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_ACCURATE, GST_SEEK_TYPE_SET, offset,
633 GST_SEEK_TYPE_NONE, -1);
635 res = gst_pad_push_event (dlbuf->sinkpad, event);
636 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
641 /* get the threshold for when we decide to seek rather than wait */
643 get_seek_threshold (GstDownloadBuffer * dlbuf)
647 /* FIXME, find a good threshold based on the incoming rate. */
648 threshold = 1024 * 512;
653 /* called with DOWNLOAD_BUFFER_MUTEX */
655 gst_download_buffer_update_upstream_size (GstDownloadBuffer * dlbuf)
657 gint64 upstream_size = 0;
659 if (gst_pad_peer_query_duration (dlbuf->sinkpad, GST_FORMAT_BYTES,
661 GST_INFO_OBJECT (dlbuf, "upstream size: %" G_GINT64_FORMAT, upstream_size);
662 dlbuf->upstream_size = upstream_size;
666 /* called with DOWNLOAD_BUFFER_MUTEX */
668 gst_download_buffer_wait_for_data (GstDownloadBuffer * dlbuf, guint64 offset,
675 GST_DEBUG_OBJECT (dlbuf, "wait for %" G_GUINT64_FORMAT ", length %u",
678 wanted = offset + length;
680 /* pause the timer while we wait. The fact that we are waiting does not mean
681 * the byterate on the output pad is lower */
682 if ((started = dlbuf->out_timer_started))
683 g_timer_stop (dlbuf->out_timer);
685 /* check range before us */
686 if (gst_sparse_file_get_range_before (dlbuf->file, offset, &start, &stop)) {
687 GST_DEBUG_OBJECT (dlbuf,
688 "range before %" G_GSIZE_FORMAT " - %" G_GSIZE_FORMAT, start, stop);
689 if (start <= offset && offset < stop) {
690 GST_DEBUG_OBJECT (dlbuf, "we have the offset");
691 /* we have the range, continue it */
694 guint64 threshold, dist;
696 /* there is a range before us, check how far away it is */
697 threshold = get_seek_threshold (dlbuf);
698 dist = offset - stop;
700 if (dist <= threshold) {
701 GST_DEBUG_OBJECT (dlbuf, "not too far");
702 /* not far away, continue it */
708 if (dlbuf->write_pos != offset)
709 perform_seek_to_offset (dlbuf, offset);
711 dlbuf->filling = TRUE;
712 if (dlbuf->write_pos > dlbuf->read_pos)
713 update_levels (dlbuf, dlbuf->write_pos - dlbuf->read_pos);
715 update_levels (dlbuf, 0);
717 /* now wait for more data */
718 GST_DEBUG_OBJECT (dlbuf, "waiting for more data");
719 GST_DOWNLOAD_BUFFER_WAIT_ADD_CHECK (dlbuf, dlbuf->srcresult, wanted,
721 GST_DEBUG_OBJECT (dlbuf, "got more data");
723 /* and continue if we were running before */
725 g_timer_continue (dlbuf->out_timer);
731 GST_DEBUG_OBJECT (dlbuf, "we are flushing");
732 return GST_FLOW_FLUSHING;
736 /* called with DOWNLOAD_BUFFER_MUTEX */
738 check_upstream_size (GstDownloadBuffer * dlbuf, gsize offset, guint * length)
740 gsize stop = offset + *length;
741 /* catch any reads beyond the size of the file here to make sure cache
742 * doesn't send seek events beyond the size of the file upstream, since
743 * that would confuse elements such as souphttpsrc and/or http servers.
744 * Demuxers often just loop until EOS at the end of the file to figure out
745 * when they've read all the end-headers or index chunks. */
746 if (G_UNLIKELY (dlbuf->upstream_size == -1 || stop >= dlbuf->upstream_size)) {
747 gst_download_buffer_update_upstream_size (dlbuf);
750 if (dlbuf->upstream_size != -1) {
751 if (offset >= dlbuf->upstream_size)
754 if (G_UNLIKELY (stop > dlbuf->upstream_size)) {
755 *length = dlbuf->upstream_size - offset;
756 GST_DEBUG_OBJECT (dlbuf, "adjusting length downto %u", *length);
762 /* called with DOWNLOAD_BUFFER_MUTEX */
764 gst_download_buffer_read_buffer (GstDownloadBuffer * dlbuf, guint64 offset,
765 guint length, GstBuffer ** buffer)
769 GstFlowReturn ret = GST_FLOW_OK;
770 gsize res, remaining;
771 GError *error = NULL;
773 length = (length == -1) ? DEFAULT_BUFFER_SIZE : length;
774 offset = (offset == -1) ? dlbuf->read_pos : offset;
776 if (!check_upstream_size (dlbuf, offset, &length))
779 /* allocate the output buffer of the requested size */
781 buf = gst_buffer_new_allocate (NULL, length, NULL);
785 gst_buffer_map (buf, &info, GST_MAP_WRITE);
787 GST_DEBUG_OBJECT (dlbuf, "Reading %u bytes from %" G_GUINT64_FORMAT, length,
790 dlbuf->read_pos = offset;
794 gst_sparse_file_read (dlbuf->file, offset, info.data, length,
796 if (G_UNLIKELY (res == 0)) {
797 switch (error->code) {
798 case GST_SPARSE_FILE_IO_ERROR_WOULD_BLOCK:
799 /* we don't have the requested data in the file, decide what to
801 ret = gst_download_buffer_wait_for_data (dlbuf, offset, length);
802 if (ret != GST_FLOW_OK)
808 g_clear_error (&error);
812 gst_buffer_unmap (buf, &info);
813 gst_buffer_resize (buf, 0, res);
815 dlbuf->bytes_out += res;
816 dlbuf->read_pos += res;
818 GST_DEBUG_OBJECT (dlbuf,
819 "Read %" G_GSIZE_FORMAT " bytes, remaining %" G_GSIZE_FORMAT, res,
822 if (dlbuf->read_pos + remaining == dlbuf->upstream_size)
823 update_levels (dlbuf, dlbuf->max_level.bytes);
825 update_levels (dlbuf, remaining);
827 GST_BUFFER_OFFSET (buf) = offset;
828 GST_BUFFER_OFFSET_END (buf) = offset + res;
837 GST_DEBUG_OBJECT (dlbuf, "EOS hit");
842 GST_DEBUG_OBJECT (dlbuf, "we are flushing");
843 g_clear_error (&error);
844 gst_buffer_unmap (buf, &info);
846 gst_buffer_unref (buf);
847 return GST_FLOW_FLUSHING;
851 GST_DEBUG_OBJECT (dlbuf, "we have a read error: %s", error->message);
852 g_clear_error (&error);
853 gst_buffer_unmap (buf, &info);
855 gst_buffer_unref (buf);
860 /* must be called with MUTEX_LOCK. Will briefly release the lock when notifying
861 * the temp filename. */
863 gst_download_buffer_open_temp_location_file (GstDownloadBuffer * dlbuf)
871 GST_DEBUG_OBJECT (dlbuf, "opening temp file %s", dlbuf->temp_template);
873 /* If temp_template was set, allocate a filename and open that file */
876 if (dlbuf->temp_template == NULL)
879 /* make copy of the template, we don't want to change this */
880 name = g_strdup (dlbuf->temp_template);
882 fd = g_mkstemp_full (name, O_RDWR | O_LARGEFILE, S_IRUSR | S_IWUSR);
884 fd = g_mkstemp (name);
889 /* open the file for update/writing */
890 dlbuf->file = gst_sparse_file_new ();
891 /* error creating file */
892 if (!gst_sparse_file_set_fd (dlbuf->file, fd))
895 g_free (dlbuf->temp_location);
896 dlbuf->temp_location = name;
898 reset_positions (dlbuf);
900 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
902 /* we can't emit the notify with the lock */
903 g_object_notify (G_OBJECT (dlbuf), "temp-location");
905 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
907 GST_DEBUG_OBJECT (dlbuf, "opened temp file %s", dlbuf->temp_template);
914 GST_DEBUG_OBJECT (dlbuf, "temp file was already open");
919 GST_ELEMENT_ERROR (dlbuf, RESOURCE, NOT_FOUND,
920 (_("No Temp directory specified.")), (NULL));
925 GST_ELEMENT_ERROR (dlbuf, RESOURCE, OPEN_READ,
926 (_("Could not create temp file \"%s\"."), dlbuf->temp_template),
933 GST_ELEMENT_ERROR (dlbuf, RESOURCE, OPEN_READ,
934 (_("Could not open file \"%s\" for reading."), name), GST_ERROR_SYSTEM);
943 gst_download_buffer_close_temp_location_file (GstDownloadBuffer * dlbuf)
946 if (dlbuf->file == NULL)
949 GST_DEBUG_OBJECT (dlbuf, "closing sparse file");
951 if (dlbuf->temp_remove) {
952 if (remove (dlbuf->temp_location) < 0) {
953 GST_WARNING_OBJECT (dlbuf, "Failed to remove temporary file %s: %s",
954 dlbuf->temp_location, g_strerror (errno));
957 gst_sparse_file_free (dlbuf->file);
958 close (dlbuf->temp_fd);
963 gst_download_buffer_flush_temp_file (GstDownloadBuffer * dlbuf)
965 if (dlbuf->file == NULL)
968 GST_DEBUG_OBJECT (dlbuf, "flushing temp file");
970 gst_sparse_file_clear (dlbuf->file);
974 gst_download_buffer_locked_flush (GstDownloadBuffer * dlbuf, gboolean full,
978 gst_download_buffer_flush_temp_file (dlbuf);
979 reset_positions (dlbuf);
980 gst_event_replace (&dlbuf->stream_start_event, NULL);
981 gst_event_replace (&dlbuf->segment_event, NULL);
985 gst_download_buffer_handle_sink_event (GstPad * pad, GstObject * parent,
989 GstDownloadBuffer *dlbuf;
991 dlbuf = GST_DOWNLOAD_BUFFER (parent);
993 switch (GST_EVENT_TYPE (event)) {
994 case GST_EVENT_FLUSH_START:
996 GST_LOG_OBJECT (dlbuf, "received flush start event");
997 if (GST_PAD_MODE (dlbuf->srcpad) == GST_PAD_MODE_PUSH) {
999 ret = gst_pad_push_event (dlbuf->srcpad, event);
1001 /* now unblock the chain function */
1002 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
1003 dlbuf->srcresult = GST_FLOW_FLUSHING;
1004 dlbuf->sinkresult = GST_FLOW_FLUSHING;
1005 /* unblock the loop and chain functions */
1006 GST_DOWNLOAD_BUFFER_SIGNAL_ADD (dlbuf, -1);
1007 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1009 /* make sure it pauses, this should happen since we sent
1010 * flush_start downstream. */
1011 gst_pad_pause_task (dlbuf->srcpad);
1012 GST_LOG_OBJECT (dlbuf, "loop stopped");
1014 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
1015 /* flush the sink pad */
1016 dlbuf->sinkresult = GST_FLOW_FLUSHING;
1017 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1019 gst_event_unref (event);
1023 case GST_EVENT_FLUSH_STOP:
1025 GST_LOG_OBJECT (dlbuf, "received flush stop event");
1027 if (GST_PAD_MODE (dlbuf->srcpad) == GST_PAD_MODE_PUSH) {
1029 ret = gst_pad_push_event (dlbuf->srcpad, event);
1031 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
1032 gst_download_buffer_locked_flush (dlbuf, FALSE, TRUE);
1033 dlbuf->srcresult = GST_FLOW_OK;
1034 dlbuf->sinkresult = GST_FLOW_OK;
1035 dlbuf->unexpected = FALSE;
1036 dlbuf->seeking = FALSE;
1037 /* reset rate counters */
1038 reset_rate_timer (dlbuf);
1039 gst_pad_start_task (dlbuf->srcpad,
1040 (GstTaskFunction) gst_download_buffer_loop, dlbuf->srcpad, NULL);
1041 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1043 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
1044 dlbuf->unexpected = FALSE;
1045 dlbuf->sinkresult = GST_FLOW_OK;
1046 dlbuf->seeking = FALSE;
1047 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1049 gst_event_unref (event);
1054 if (GST_EVENT_IS_SERIALIZED (event)) {
1055 GstMessage *msg = NULL;
1057 /* serialized events go in the buffer */
1058 GST_DOWNLOAD_BUFFER_MUTEX_LOCK_CHECK (dlbuf, dlbuf->sinkresult,
1060 switch (GST_EVENT_TYPE (event)) {
1062 GST_DEBUG_OBJECT (dlbuf, "we have EOS");
1063 /* Zero the thresholds, this makes sure the dlbuf is completely
1064 * filled and we can read all data from the dlbuf. */
1065 /* update the buffering status */
1066 update_levels (dlbuf, dlbuf->max_level.bytes);
1067 /* update the buffering */
1068 msg = update_buffering (dlbuf);
1069 /* wakeup the waiter and let it recheck */
1070 GST_DOWNLOAD_BUFFER_SIGNAL_ADD (dlbuf, -1);
1072 case GST_EVENT_SEGMENT:
1073 gst_event_replace (&dlbuf->segment_event, event);
1074 /* a new segment allows us to accept more buffers if we got EOS
1075 * from downstream */
1076 dlbuf->unexpected = FALSE;
1078 case GST_EVENT_STREAM_START:
1079 gst_event_replace (&dlbuf->stream_start_event, event);
1084 gst_event_unref (event);
1085 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1087 gst_element_post_message (GST_ELEMENT_CAST (dlbuf), msg);
1089 /* non-serialized events are passed upstream. */
1090 ret = gst_pad_push_event (dlbuf->srcpad, event);
1099 GST_DEBUG_OBJECT (dlbuf, "refusing event, we are flushing");
1100 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1101 gst_event_unref (event);
1107 gst_download_buffer_handle_sink_query (GstPad * pad, GstObject * parent,
1110 GstDownloadBuffer *dlbuf;
1113 dlbuf = GST_DOWNLOAD_BUFFER (parent);
1115 switch (GST_QUERY_TYPE (query)) {
1117 if (GST_QUERY_IS_SERIALIZED (query)) {
1118 GST_LOG_OBJECT (dlbuf, "received query %p", query);
1119 GST_DEBUG_OBJECT (dlbuf, "refusing query, we are not using the dlbuf");
1122 res = gst_pad_query_default (pad, parent, query);
1129 static GstFlowReturn
1130 gst_download_buffer_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
1132 GstDownloadBuffer *dlbuf;
1135 gsize res, available;
1136 GError *error = NULL;
1137 GstMessage *msg = NULL;
1139 dlbuf = GST_DOWNLOAD_BUFFER (parent);
1141 GST_LOG_OBJECT (dlbuf, "received buffer %p of "
1142 "size %" G_GSIZE_FORMAT ", time %" GST_TIME_FORMAT ", duration %"
1143 GST_TIME_FORMAT, buffer, gst_buffer_get_size (buffer),
1144 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
1145 GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
1147 /* we have to lock the dlbuf since we span threads */
1148 GST_DOWNLOAD_BUFFER_MUTEX_LOCK_CHECK (dlbuf, dlbuf->sinkresult, out_flushing);
1149 /* when we received unexpected from downstream, refuse more buffers */
1150 if (dlbuf->unexpected)
1153 /* while we didn't receive the newsegment, we're seeking and we skip data */
1157 /* put buffer in dlbuf now */
1158 offset = dlbuf->write_pos;
1161 if (GST_BUFFER_OFFSET_IS_VALID (buffer) &&
1162 GST_BUFFER_OFFSET (buffer) != offset) {
1163 GST_WARNING_OBJECT (dlbuf, "buffer offset does not match current writing "
1164 "position! %" G_GINT64_FORMAT " != %" G_GINT64_FORMAT,
1165 GST_BUFFER_OFFSET (buffer), offset);
1168 gst_buffer_map (buffer, &info, GST_MAP_READ);
1170 GST_DEBUG_OBJECT (dlbuf, "Writing %" G_GSIZE_FORMAT " bytes to %"
1171 G_GUINT64_FORMAT, info.size, offset);
1174 gst_sparse_file_write (dlbuf->file, offset, info.data, info.size,
1175 &available, &error);
1179 gst_buffer_unmap (buffer, &info);
1180 gst_buffer_unref (buffer);
1182 dlbuf->write_pos = offset + info.size;
1183 dlbuf->bytes_in += info.size;
1185 GST_DOWNLOAD_BUFFER_SIGNAL_ADD (dlbuf, dlbuf->write_pos + available);
1187 /* we hit the end, see what to do */
1188 if (dlbuf->write_pos + available == dlbuf->upstream_size) {
1191 /* we have everything up to the end, find a region to fill */
1192 if (gst_sparse_file_get_range_after (dlbuf->file, 0, &start, &stop)) {
1193 if (stop < dlbuf->upstream_size) {
1194 /* a hole to fill, seek to its end */
1195 perform_seek_to_offset (dlbuf, stop);
1197 /* we filled all the holes, we are done */
1202 /* see if we need to skip this region or just read it again. The idea
1203 * is that when the region is not big, we want to avoid a seek and just
1205 guint64 threshold = get_seek_threshold (dlbuf);
1207 if (available > threshold) {
1208 /* further than threshold, it's better to skip than to reread */
1209 perform_seek_to_offset (dlbuf, dlbuf->write_pos + available);
1212 if (dlbuf->filling) {
1213 if (dlbuf->write_pos > dlbuf->read_pos)
1214 update_levels (dlbuf, dlbuf->write_pos - dlbuf->read_pos);
1216 update_levels (dlbuf, 0);
1219 /* update the buffering */
1220 msg = update_buffering (dlbuf);
1222 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1225 gst_element_post_message (GST_ELEMENT_CAST (dlbuf), msg);
1232 GstFlowReturn ret = dlbuf->sinkresult;
1233 GST_LOG_OBJECT (dlbuf,
1234 "exit because task paused, reason: %s", gst_flow_get_name (ret));
1235 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1236 gst_buffer_unref (buffer);
1241 GST_LOG_OBJECT (dlbuf, "exit because we received EOS");
1242 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1243 gst_buffer_unref (buffer);
1244 return GST_FLOW_EOS;
1248 GST_LOG_OBJECT (dlbuf, "exit because we are seeking");
1249 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1250 gst_buffer_unref (buffer);
1255 gst_buffer_unmap (buffer, &info);
1256 gst_buffer_unref (buffer);
1257 GST_ELEMENT_ERROR (dlbuf, RESOURCE, WRITE,
1258 (_("Error while writing to download file.")), ("%s", error->message));
1259 g_clear_error (&error);
1260 return GST_FLOW_ERROR;
1264 GST_LOG_OBJECT (dlbuf, "we completed the download");
1265 dlbuf->write_pos = dlbuf->upstream_size;
1266 dlbuf->filling = FALSE;
1267 update_levels (dlbuf, dlbuf->max_level.bytes);
1268 msg = update_buffering (dlbuf);
1270 gst_element_post_message (GST_ELEMENT_CAST (dlbuf),
1271 gst_message_new_element (GST_OBJECT_CAST (dlbuf),
1272 gst_structure_new ("GstCacheDownloadComplete",
1273 "location", G_TYPE_STRING, dlbuf->temp_location, NULL)));
1275 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1278 gst_element_post_message (GST_ELEMENT_CAST (dlbuf), msg);
1280 return GST_FLOW_EOS;
1284 /* called repeatedly with @pad as the source pad. This function should push out
1285 * data to the peer element. */
1287 gst_download_buffer_loop (GstPad * pad)
1289 GstDownloadBuffer *dlbuf;
1291 GstBuffer *buffer = NULL;
1292 GstMessage *msg = NULL;
1294 dlbuf = GST_DOWNLOAD_BUFFER (GST_PAD_PARENT (pad));
1296 /* have to lock for thread-safety */
1297 GST_DOWNLOAD_BUFFER_MUTEX_LOCK_CHECK (dlbuf, dlbuf->srcresult, out_flushing);
1299 if (dlbuf->stream_start_event != NULL) {
1300 gst_pad_push_event (dlbuf->srcpad, dlbuf->stream_start_event);
1301 dlbuf->stream_start_event = NULL;
1303 if (dlbuf->segment_event != NULL) {
1304 gst_pad_push_event (dlbuf->srcpad, dlbuf->segment_event);
1305 dlbuf->segment_event = NULL;
1308 ret = gst_download_buffer_read_buffer (dlbuf, -1, -1, &buffer);
1309 if (ret != GST_FLOW_OK)
1312 /* update the buffering */
1313 msg = update_buffering (dlbuf);
1315 g_atomic_int_set (&dlbuf->downstream_may_block, 1);
1316 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1319 gst_element_post_message (GST_ELEMENT_CAST (dlbuf), msg);
1321 ret = gst_pad_push (dlbuf->srcpad, buffer);
1322 g_atomic_int_set (&dlbuf->downstream_may_block, 0);
1324 /* need to check for srcresult here as well */
1325 GST_DOWNLOAD_BUFFER_MUTEX_LOCK_CHECK (dlbuf, dlbuf->srcresult, out_flushing);
1326 dlbuf->srcresult = ret;
1327 dlbuf->sinkresult = ret;
1328 if (ret != GST_FLOW_OK)
1330 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1337 GstFlowReturn ret = dlbuf->srcresult;
1339 gst_pad_pause_task (dlbuf->srcpad);
1340 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1341 GST_LOG_OBJECT (dlbuf, "pause task, reason: %s", gst_flow_get_name (ret));
1342 /* let app know about us giving up if upstream is not expected to do so */
1343 if (ret == GST_FLOW_EOS) {
1344 /* FIXME perform EOS logic, this is really a basesrc operating on a
1346 gst_pad_push_event (dlbuf->srcpad, gst_event_new_eos ());
1347 } else if ((ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS)) {
1348 GST_ELEMENT_ERROR (dlbuf, STREAM, FAILED,
1349 (_("Internal data flow error.")),
1350 ("streaming task paused, reason %s (%d)",
1351 gst_flow_get_name (ret), ret));
1352 gst_pad_push_event (dlbuf->srcpad, gst_event_new_eos ());
1359 gst_download_buffer_handle_src_event (GstPad * pad, GstObject * parent,
1362 gboolean res = TRUE;
1363 GstDownloadBuffer *dlbuf = GST_DOWNLOAD_BUFFER (parent);
1365 #ifndef GST_DISABLE_GST_DEBUG
1366 GST_DEBUG_OBJECT (dlbuf, "got event %p (%s)",
1367 event, GST_EVENT_TYPE_NAME (event));
1370 switch (GST_EVENT_TYPE (event)) {
1371 case GST_EVENT_FLUSH_START:
1372 /* now unblock the getrange function */
1373 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
1374 GST_DEBUG_OBJECT (dlbuf, "flushing");
1375 dlbuf->srcresult = GST_FLOW_FLUSHING;
1376 GST_DOWNLOAD_BUFFER_SIGNAL_ADD (dlbuf, -1);
1377 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1379 /* when using a temp file, we eat the event */
1381 gst_event_unref (event);
1383 case GST_EVENT_FLUSH_STOP:
1384 /* now unblock the getrange function */
1385 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
1386 dlbuf->srcresult = GST_FLOW_OK;
1387 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1389 /* when using a temp file, we eat the event */
1391 gst_event_unref (event);
1393 case GST_EVENT_RECONFIGURE:
1394 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
1395 /* assume downstream is linked now and try to push again */
1396 if (dlbuf->srcresult == GST_FLOW_NOT_LINKED) {
1397 dlbuf->srcresult = GST_FLOW_OK;
1398 dlbuf->sinkresult = GST_FLOW_OK;
1399 if (GST_PAD_MODE (pad) == GST_PAD_MODE_PUSH) {
1400 gst_pad_start_task (pad, (GstTaskFunction) gst_download_buffer_loop,
1404 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1406 res = gst_pad_push_event (dlbuf->sinkpad, event);
1409 res = gst_pad_push_event (dlbuf->sinkpad, event);
1417 gst_download_buffer_handle_src_query (GstPad * pad, GstObject * parent,
1420 GstDownloadBuffer *dlbuf;
1422 dlbuf = GST_DOWNLOAD_BUFFER (parent);
1424 switch (GST_QUERY_TYPE (query)) {
1425 case GST_QUERY_POSITION:
1430 if (!gst_pad_peer_query (dlbuf->sinkpad, query))
1433 /* get peer position */
1434 gst_query_parse_position (query, &format, &peer_pos);
1436 /* FIXME: this code assumes that there's no discont in the dlbuf */
1438 case GST_FORMAT_BYTES:
1439 peer_pos -= dlbuf->cur_level.bytes;
1441 case GST_FORMAT_TIME:
1442 peer_pos -= dlbuf->cur_level.time;
1445 GST_WARNING_OBJECT (dlbuf, "dropping query in %s format, don't "
1446 "know how to adjust value", gst_format_get_name (format));
1449 /* set updated position */
1450 gst_query_set_position (query, format, peer_pos);
1453 case GST_QUERY_DURATION:
1455 GST_DEBUG_OBJECT (dlbuf, "doing peer query");
1457 if (!gst_pad_peer_query (dlbuf->sinkpad, query))
1460 GST_DEBUG_OBJECT (dlbuf, "peer query success");
1463 case GST_QUERY_BUFFERING:
1466 gboolean is_buffering;
1467 GstBufferingMode mode;
1468 gint avg_in, avg_out;
1469 gint64 buffering_left;
1471 GST_DEBUG_OBJECT (dlbuf, "query buffering");
1473 get_buffering_percent (dlbuf, &is_buffering, &percent);
1474 gst_query_set_buffering_percent (query, is_buffering, percent);
1476 get_buffering_stats (dlbuf, percent, &mode, &avg_in, &avg_out,
1478 gst_query_set_buffering_stats (query, mode, avg_in, avg_out,
1482 /* add ranges for download and ringbuffer buffering */
1486 gint64 estimated_total;
1488 gsize offset, range_start, range_stop;
1490 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
1491 write_pos = dlbuf->write_pos;
1493 /* get duration of upstream in bytes */
1494 gst_download_buffer_update_upstream_size (dlbuf);
1495 duration = dlbuf->upstream_size;
1497 GST_DEBUG_OBJECT (dlbuf, "percent %d, duration %" G_GINT64_FORMAT
1498 ", writing %" G_GINT64_FORMAT, percent, duration, write_pos);
1500 gst_query_parse_buffering_range (query, &format, NULL, NULL, NULL);
1502 /* fill out the buffered ranges */
1505 estimated_total = -1;
1506 while (gst_sparse_file_get_range_after (dlbuf->file, offset,
1507 &range_start, &range_stop)) {
1508 gboolean current_range;
1510 GST_DEBUG_OBJECT (dlbuf,
1511 "range starting at %" G_GSIZE_FORMAT " and finishing at %"
1512 G_GSIZE_FORMAT, range_start, range_stop);
1514 offset = range_stop;
1516 /* find the range we are currently downloading, we'll remember it
1517 * after we convert to the target format */
1518 if (range_start <= write_pos && range_stop >= write_pos) {
1519 current_range = TRUE;
1520 /* calculate remaining and total download time */
1521 if (duration >= range_stop && avg_in > 0.0)
1522 estimated_total = ((duration - range_stop) * 1000) / avg_in;
1524 current_range = FALSE;
1527 case GST_FORMAT_PERCENT:
1528 /* get our available data relative to the duration */
1529 if (duration == -1) {
1533 range_start = gst_util_uint64_scale (GST_FORMAT_PERCENT_MAX,
1534 range_start, duration);
1535 range_stop = gst_util_uint64_scale (GST_FORMAT_PERCENT_MAX,
1536 range_stop, duration);
1539 case GST_FORMAT_BYTES:
1547 if (current_range) {
1548 /* we are currently downloading this range */
1549 start = range_start;
1552 GST_DEBUG_OBJECT (dlbuf,
1553 "range to format: %" G_GSIZE_FORMAT " - %" G_GSIZE_FORMAT,
1554 range_start, range_stop);
1555 if (range_start == range_stop)
1557 gst_query_add_buffering_range (query, range_start, range_stop);
1560 GST_DEBUG_OBJECT (dlbuf, "estimated-total %" G_GINT64_FORMAT,
1563 gst_query_set_buffering_range (query, format, start, stop,
1566 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1570 case GST_QUERY_SCHEDULING:
1572 GstSchedulingFlags flags = 0;
1574 if (!gst_pad_peer_query (dlbuf->sinkpad, query))
1577 gst_query_parse_scheduling (query, &flags, NULL, NULL, NULL);
1579 /* we can operate in pull mode when we are using a tempfile */
1580 flags |= GST_SCHEDULING_FLAG_SEEKABLE;
1581 gst_query_set_scheduling (query, flags, 0, -1, 0);
1582 gst_query_add_scheduling_mode (query, GST_PAD_MODE_PULL);
1583 gst_query_add_scheduling_mode (query, GST_PAD_MODE_PUSH);
1587 /* peer handled other queries */
1588 if (!gst_pad_query_default (pad, parent, query))
1598 GST_DEBUG_OBJECT (dlbuf, "failed peer query");
1604 gst_download_buffer_handle_query (GstElement * element, GstQuery * query)
1606 GstDownloadBuffer *dlbuf = GST_DOWNLOAD_BUFFER (element);
1608 /* simply forward to the srcpad query function */
1609 return gst_download_buffer_handle_src_query (dlbuf->srcpad,
1610 GST_OBJECT_CAST (element), query);
1613 static GstFlowReturn
1614 gst_download_buffer_get_range (GstPad * pad, GstObject * parent, guint64 offset,
1615 guint length, GstBuffer ** buffer)
1617 GstDownloadBuffer *dlbuf;
1619 GstMessage *msg = NULL;
1621 dlbuf = GST_DOWNLOAD_BUFFER_CAST (parent);
1623 GST_DOWNLOAD_BUFFER_MUTEX_LOCK_CHECK (dlbuf, dlbuf->srcresult, out_flushing);
1624 /* FIXME - function will block when the range is not yet available */
1625 ret = gst_download_buffer_read_buffer (dlbuf, offset, length, buffer);
1626 /* update the buffering */
1627 msg = update_buffering (dlbuf);
1629 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1632 gst_element_post_message (GST_ELEMENT_CAST (dlbuf), msg);
1639 ret = dlbuf->srcresult;
1641 GST_DEBUG_OBJECT (dlbuf, "we are flushing");
1642 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1647 /* sink currently only operates in push mode */
1649 gst_download_buffer_sink_activate_mode (GstPad * pad, GstObject * parent,
1650 GstPadMode mode, gboolean active)
1653 GstDownloadBuffer *dlbuf;
1655 dlbuf = GST_DOWNLOAD_BUFFER (parent);
1658 case GST_PAD_MODE_PUSH:
1660 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
1661 GST_DEBUG_OBJECT (dlbuf, "activating push mode");
1662 dlbuf->srcresult = GST_FLOW_OK;
1663 dlbuf->sinkresult = GST_FLOW_OK;
1664 dlbuf->unexpected = FALSE;
1665 reset_rate_timer (dlbuf);
1666 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1668 /* unblock chain function */
1669 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
1670 GST_DEBUG_OBJECT (dlbuf, "deactivating push mode");
1671 dlbuf->srcresult = GST_FLOW_FLUSHING;
1672 dlbuf->sinkresult = GST_FLOW_FLUSHING;
1673 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1675 /* wait until it is unblocked and clean up */
1676 GST_PAD_STREAM_LOCK (pad);
1677 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
1678 gst_download_buffer_locked_flush (dlbuf, TRUE, FALSE);
1679 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1680 GST_PAD_STREAM_UNLOCK (pad);
1691 /* src operating in push mode, we start a task on the source pad that pushes out
1692 * buffers from the dlbuf */
1694 gst_download_buffer_src_activate_push (GstPad * pad, GstObject * parent,
1697 gboolean result = FALSE;
1698 GstDownloadBuffer *dlbuf;
1700 dlbuf = GST_DOWNLOAD_BUFFER (parent);
1703 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
1704 GST_DEBUG_OBJECT (dlbuf, "activating push mode");
1705 dlbuf->srcresult = GST_FLOW_OK;
1706 dlbuf->sinkresult = GST_FLOW_OK;
1707 dlbuf->unexpected = FALSE;
1709 gst_pad_start_task (pad, (GstTaskFunction) gst_download_buffer_loop,
1711 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1713 /* unblock loop function */
1714 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
1715 GST_DEBUG_OBJECT (dlbuf, "deactivating push mode");
1716 dlbuf->srcresult = GST_FLOW_FLUSHING;
1717 dlbuf->sinkresult = GST_FLOW_FLUSHING;
1718 /* the item add signal will unblock */
1719 GST_DOWNLOAD_BUFFER_SIGNAL_ADD (dlbuf, -1);
1720 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1722 /* step 2, make sure streaming finishes */
1723 result = gst_pad_stop_task (pad);
1729 /* pull mode, downstream will call our getrange function */
1731 gst_download_buffer_src_activate_pull (GstPad * pad, GstObject * parent,
1735 GstDownloadBuffer *dlbuf;
1737 dlbuf = GST_DOWNLOAD_BUFFER (parent);
1740 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
1741 /* open the temp file now */
1742 result = gst_download_buffer_open_temp_location_file (dlbuf);
1743 GST_DEBUG_OBJECT (dlbuf, "activating pull mode");
1744 dlbuf->srcresult = GST_FLOW_OK;
1745 dlbuf->sinkresult = GST_FLOW_OK;
1746 dlbuf->unexpected = FALSE;
1747 dlbuf->upstream_size = 0;
1748 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1750 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
1751 GST_DEBUG_OBJECT (dlbuf, "deactivating pull mode");
1752 dlbuf->srcresult = GST_FLOW_FLUSHING;
1753 dlbuf->sinkresult = GST_FLOW_FLUSHING;
1754 /* this will unlock getrange */
1755 GST_DOWNLOAD_BUFFER_SIGNAL_ADD (dlbuf, -1);
1757 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1764 gst_download_buffer_src_activate_mode (GstPad * pad, GstObject * parent,
1765 GstPadMode mode, gboolean active)
1770 case GST_PAD_MODE_PULL:
1771 res = gst_download_buffer_src_activate_pull (pad, parent, active);
1773 case GST_PAD_MODE_PUSH:
1774 res = gst_download_buffer_src_activate_push (pad, parent, active);
1777 GST_LOG_OBJECT (pad, "unknown activation mode %d", mode);
1784 static GstStateChangeReturn
1785 gst_download_buffer_change_state (GstElement * element,
1786 GstStateChange transition)
1788 GstDownloadBuffer *dlbuf;
1789 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
1791 dlbuf = GST_DOWNLOAD_BUFFER (element);
1793 switch (transition) {
1794 case GST_STATE_CHANGE_NULL_TO_READY:
1796 case GST_STATE_CHANGE_READY_TO_PAUSED:
1797 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
1798 if (!gst_download_buffer_open_temp_location_file (dlbuf))
1799 ret = GST_STATE_CHANGE_FAILURE;
1800 gst_event_replace (&dlbuf->stream_start_event, NULL);
1801 gst_event_replace (&dlbuf->segment_event, NULL);
1802 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1804 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
1810 if (ret == GST_STATE_CHANGE_FAILURE)
1813 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1815 if (ret == GST_STATE_CHANGE_FAILURE)
1818 switch (transition) {
1819 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
1821 case GST_STATE_CHANGE_PAUSED_TO_READY:
1822 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
1823 gst_download_buffer_close_temp_location_file (dlbuf);
1824 gst_event_replace (&dlbuf->stream_start_event, NULL);
1825 gst_event_replace (&dlbuf->segment_event, NULL);
1826 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1828 case GST_STATE_CHANGE_READY_TO_NULL:
1837 #define CAPACITY_CHANGE(elem) \
1838 update_buffering (elem);
1841 gst_download_buffer_set_temp_template (GstDownloadBuffer * dlbuf,
1842 const gchar * template)
1846 /* the element must be stopped in order to do this */
1847 GST_OBJECT_LOCK (dlbuf);
1848 state = GST_STATE (dlbuf);
1849 if (state != GST_STATE_READY && state != GST_STATE_NULL)
1851 GST_OBJECT_UNLOCK (dlbuf);
1853 /* set new location */
1854 g_free (dlbuf->temp_template);
1855 dlbuf->temp_template = g_strdup (template);
1862 GST_WARNING_OBJECT (dlbuf, "setting temp-template property in wrong state");
1863 GST_OBJECT_UNLOCK (dlbuf);
1868 gst_download_buffer_set_property (GObject * object,
1869 guint prop_id, const GValue * value, GParamSpec * pspec)
1871 GstDownloadBuffer *dlbuf = GST_DOWNLOAD_BUFFER (object);
1872 GstMessage *msg = NULL;
1874 /* someone could change levels here, and since this
1875 * affects the get/put funcs, we need to lock for safety. */
1876 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
1879 case PROP_MAX_SIZE_BYTES:
1880 dlbuf->max_level.bytes = g_value_get_uint (value);
1881 msg = CAPACITY_CHANGE (dlbuf);
1883 case PROP_MAX_SIZE_TIME:
1884 dlbuf->max_level.time = g_value_get_uint64 (value);
1885 msg = CAPACITY_CHANGE (dlbuf);
1887 case PROP_LOW_PERCENT:
1888 dlbuf->low_percent = g_value_get_int (value);
1890 case PROP_HIGH_PERCENT:
1891 dlbuf->high_percent = g_value_get_int (value);
1893 case PROP_TEMP_TEMPLATE:
1894 gst_download_buffer_set_temp_template (dlbuf, g_value_get_string (value));
1896 case PROP_TEMP_REMOVE:
1897 dlbuf->temp_remove = g_value_get_boolean (value);
1900 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1904 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);
1907 gst_element_post_message (GST_ELEMENT_CAST (dlbuf), msg);
1912 gst_download_buffer_get_property (GObject * object,
1913 guint prop_id, GValue * value, GParamSpec * pspec)
1915 GstDownloadBuffer *dlbuf = GST_DOWNLOAD_BUFFER (object);
1917 GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf);
1920 case PROP_MAX_SIZE_BYTES:
1921 g_value_set_uint (value, dlbuf->max_level.bytes);
1923 case PROP_MAX_SIZE_TIME:
1924 g_value_set_uint64 (value, dlbuf->max_level.time);
1926 case PROP_LOW_PERCENT:
1927 g_value_set_int (value, dlbuf->low_percent);
1929 case PROP_HIGH_PERCENT:
1930 g_value_set_int (value, dlbuf->high_percent);
1932 case PROP_TEMP_TEMPLATE:
1933 g_value_set_string (value, dlbuf->temp_template);
1935 case PROP_TEMP_LOCATION:
1936 g_value_set_string (value, dlbuf->temp_location);
1938 case PROP_TEMP_REMOVE:
1939 g_value_set_boolean (value, dlbuf->temp_remove);
1942 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1946 GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf);