| /* GStreamer |
| * Copyright (C) 2014 Wim Taymans <wim.taymans@gmail.com> |
| * |
| * gstdownloadbuffer.c: |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library 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 |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| /** |
| * SECTION:element-downloadbuffer |
| * |
| * The downloadbuffer element provides on-disk buffering and caching of, typically, |
| * a network file. temp-template should be set to a value such as |
| * /tmp/gstreamer-XXXXXX and the element will allocate a random free filename and |
| * buffer the data in the file. |
| * |
| * With max-size-bytes and max-size-time you can configure the buffering limits. |
| * The downloadbuffer element will try to read-ahead these amounts of data. When |
| * the amount of read-ahead data drops below low-percent of the configured max, |
| * the element will start emitting BUFFERING messages until high-percent of max is |
| * reached again. |
| * |
| * The downloadbuffer provides push and pull based scheduling on its source pad |
| * and will efficiently seek in the upstream element when needed. |
| * |
| * The temp-location property will be used to notify the application of the |
| * allocated filename. |
| * |
| * When the downloadbuffer has completely downloaded the media, it will |
| * post an application message named <classname>"GstCacheDownloadComplete"</classname> |
| * with the following information: |
| * <itemizedlist> |
| * <listitem> |
| * <para> |
| * G_TYPE_STRING |
| * <classname>"location"</classname>: |
| * the location of the completely downloaded file. |
| * </para> |
| * </listitem> |
| * </itemizedlist> |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include "gstdownloadbuffer.h" |
| |
| #include <glib/gstdio.h> |
| |
| #include "gst/gst-i18n-lib.h" |
| #include "gst/glib-compat-private.h" |
| |
| #include <string.h> |
| |
| #ifdef G_OS_WIN32 |
| #include <io.h> /* lseek, open, close, read */ |
| #undef lseek |
| #define lseek _lseeki64 |
| #else |
| #include <unistd.h> |
| #endif |
| |
| #ifdef __BIONIC__ |
| #include <fcntl.h> |
| #endif |
| |
| static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink", |
| GST_PAD_SINK, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS_ANY); |
| |
| static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src", |
| GST_PAD_SRC, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS_ANY); |
| |
| GST_DEBUG_CATEGORY_STATIC (downloadbuffer_debug); |
| #define GST_CAT_DEFAULT (downloadbuffer_debug) |
| |
| enum |
| { |
| LAST_SIGNAL |
| }; |
| |
| /* other defines */ |
| #define DEFAULT_BUFFER_SIZE 4096 |
| |
| /* default property values */ |
| #define DEFAULT_MAX_SIZE_BYTES (2 * 1024 * 1024) /* 2 MB */ |
| #define DEFAULT_MAX_SIZE_TIME 2 * GST_SECOND /* 2 seconds */ |
| #define DEFAULT_LOW_PERCENT 10 |
| #define DEFAULT_HIGH_PERCENT 99 |
| #define DEFAULT_TEMP_REMOVE TRUE |
| |
| enum |
| { |
| PROP_0, |
| PROP_MAX_SIZE_BYTES, |
| PROP_MAX_SIZE_TIME, |
| PROP_LOW_PERCENT, |
| PROP_HIGH_PERCENT, |
| PROP_TEMP_TEMPLATE, |
| PROP_TEMP_LOCATION, |
| PROP_TEMP_REMOVE, |
| PROP_LAST |
| }; |
| |
| #define GST_DOWNLOAD_BUFFER_CLEAR_LEVEL(l) G_STMT_START { \ |
| l.bytes = 0; \ |
| l.time = 0; \ |
| } G_STMT_END |
| |
| #define STATUS(elem, pad, msg) \ |
| GST_LOG_OBJECT (elem, "(%s:%s) " msg ": %u of %u " \ |
| "bytes, %" G_GUINT64_FORMAT " of %" G_GUINT64_FORMAT \ |
| " ns", \ |
| GST_DEBUG_PAD_NAME (pad), \ |
| elem->cur_level.bytes, \ |
| elem->max_level.bytes, \ |
| elem->cur_level.time, \ |
| elem->max_level.time) |
| |
| #define GST_DOWNLOAD_BUFFER_MUTEX_LOCK(q) G_STMT_START { \ |
| g_mutex_lock (&q->qlock); \ |
| } G_STMT_END |
| |
| #define GST_DOWNLOAD_BUFFER_MUTEX_LOCK_CHECK(q,res,label) G_STMT_START { \ |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (q); \ |
| if (res != GST_FLOW_OK) \ |
| goto label; \ |
| } G_STMT_END |
| |
| #define GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK(q) G_STMT_START { \ |
| g_mutex_unlock (&q->qlock); \ |
| } G_STMT_END |
| |
| #define GST_DOWNLOAD_BUFFER_WAIT_ADD_CHECK(q, res, o, label) G_STMT_START { \ |
| STATUS (q, q->srcpad, "wait for ADD"); \ |
| q->waiting_add = TRUE; \ |
| q->waiting_offset = o; \ |
| g_cond_wait (&q->item_add, &q->qlock); \ |
| q->waiting_add = FALSE; \ |
| if (res != GST_FLOW_OK) { \ |
| STATUS (q, q->srcpad, "received ADD wakeup"); \ |
| goto label; \ |
| } \ |
| STATUS (q, q->srcpad, "received ADD"); \ |
| } G_STMT_END |
| |
| #define GST_DOWNLOAD_BUFFER_SIGNAL_ADD(q, o) G_STMT_START { \ |
| if (q->waiting_add && q->waiting_offset <= o) { \ |
| STATUS (q, q->sinkpad, "signal ADD"); \ |
| g_cond_signal (&q->item_add); \ |
| } \ |
| } G_STMT_END |
| |
| #define _do_init \ |
| GST_DEBUG_CATEGORY_INIT (downloadbuffer_debug, "downloadbuffer", 0, \ |
| "downloadbuffer element"); |
| |
| #define gst_download_buffer_parent_class parent_class |
| G_DEFINE_TYPE_WITH_CODE (GstDownloadBuffer, gst_download_buffer, |
| GST_TYPE_ELEMENT, _do_init); |
| |
| static GstMessage *update_buffering (GstDownloadBuffer * dlbuf); |
| |
| static void gst_download_buffer_finalize (GObject * object); |
| |
| static void gst_download_buffer_set_property (GObject * object, |
| guint prop_id, const GValue * value, GParamSpec * pspec); |
| static void gst_download_buffer_get_property (GObject * object, |
| guint prop_id, GValue * value, GParamSpec * pspec); |
| |
| static GstFlowReturn gst_download_buffer_chain (GstPad * pad, |
| GstObject * parent, GstBuffer * buffer); |
| static void gst_download_buffer_loop (GstPad * pad); |
| |
| static gboolean gst_download_buffer_handle_sink_event (GstPad * pad, |
| GstObject * parent, GstEvent * event); |
| static gboolean gst_download_buffer_handle_sink_query (GstPad * pad, |
| GstObject * parent, GstQuery * query); |
| |
| static gboolean gst_download_buffer_handle_src_event (GstPad * pad, |
| GstObject * parent, GstEvent * event); |
| static gboolean gst_download_buffer_handle_src_query (GstPad * pad, |
| GstObject * parent, GstQuery * query); |
| static gboolean gst_download_buffer_handle_query (GstElement * element, |
| GstQuery * query); |
| |
| static GstFlowReturn gst_download_buffer_get_range (GstPad * pad, |
| GstObject * parent, guint64 offset, guint length, GstBuffer ** buffer); |
| |
| static gboolean gst_download_buffer_src_activate_mode (GstPad * pad, |
| GstObject * parent, GstPadMode mode, gboolean active); |
| static gboolean gst_download_buffer_sink_activate_mode (GstPad * pad, |
| GstObject * parent, GstPadMode mode, gboolean active); |
| static GstStateChangeReturn gst_download_buffer_change_state (GstElement * |
| element, GstStateChange transition); |
| |
| /* static guint gst_download_buffer_signals[LAST_SIGNAL] = { 0 }; */ |
| |
| static void |
| gst_download_buffer_class_init (GstDownloadBufferClass * klass) |
| { |
| GObjectClass *gobject_class = G_OBJECT_CLASS (klass); |
| GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass); |
| |
| gobject_class->set_property = gst_download_buffer_set_property; |
| gobject_class->get_property = gst_download_buffer_get_property; |
| |
| /* properties */ |
| g_object_class_install_property (gobject_class, PROP_MAX_SIZE_BYTES, |
| g_param_spec_uint ("max-size-bytes", "Max. size (kB)", |
| "Max. amount of data to buffer (bytes, 0=disable)", |
| 0, G_MAXUINT, DEFAULT_MAX_SIZE_BYTES, |
| G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING | |
| G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_MAX_SIZE_TIME, |
| g_param_spec_uint64 ("max-size-time", "Max. size (ns)", |
| "Max. amount of data to buffer (in ns, 0=disable)", 0, G_MAXUINT64, |
| DEFAULT_MAX_SIZE_TIME, G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING | |
| G_PARAM_STATIC_STRINGS)); |
| |
| g_object_class_install_property (gobject_class, PROP_LOW_PERCENT, |
| g_param_spec_int ("low-percent", "Low percent", |
| "Low threshold for buffering to start. Only used if use-buffering is True", |
| 0, 100, DEFAULT_LOW_PERCENT, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| g_object_class_install_property (gobject_class, PROP_HIGH_PERCENT, |
| g_param_spec_int ("high-percent", "High percent", |
| "High threshold for buffering to finish. Only used if use-buffering is True", |
| 0, 100, DEFAULT_HIGH_PERCENT, |
| G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| |
| g_object_class_install_property (gobject_class, PROP_TEMP_TEMPLATE, |
| g_param_spec_string ("temp-template", "Temporary File Template", |
| "File template to store temporary files in, should contain directory " |
| "and XXXXXX. (NULL == disabled)", |
| NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| |
| g_object_class_install_property (gobject_class, PROP_TEMP_LOCATION, |
| g_param_spec_string ("temp-location", "Temporary File Location", |
| "Location to store temporary files in (Only read this property, " |
| "use temp-template to configure the name template)", |
| NULL, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); |
| |
| /** |
| * GstDownloadBuffer:temp-remove |
| * |
| * When temp-template is set, remove the temporary file when going to READY. |
| */ |
| g_object_class_install_property (gobject_class, PROP_TEMP_REMOVE, |
| g_param_spec_boolean ("temp-remove", "Remove the Temporary File", |
| "Remove the temp-location after use", |
| DEFAULT_TEMP_REMOVE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); |
| |
| /* set several parent class virtual functions */ |
| gobject_class->finalize = gst_download_buffer_finalize; |
| |
| gst_element_class_add_static_pad_template (gstelement_class, &srctemplate); |
| gst_element_class_add_static_pad_template (gstelement_class, &sinktemplate); |
| |
| gst_element_class_set_static_metadata (gstelement_class, "DownloadBuffer", |
| "Generic", "Download Buffer element", |
| "Wim Taymans <wim.taymans@gmail.com>"); |
| |
| gstelement_class->change_state = |
| GST_DEBUG_FUNCPTR (gst_download_buffer_change_state); |
| gstelement_class->query = |
| GST_DEBUG_FUNCPTR (gst_download_buffer_handle_query); |
| } |
| |
| static void |
| gst_download_buffer_init (GstDownloadBuffer * dlbuf) |
| { |
| dlbuf->sinkpad = gst_pad_new_from_static_template (&sinktemplate, "sink"); |
| |
| gst_pad_set_chain_function (dlbuf->sinkpad, |
| GST_DEBUG_FUNCPTR (gst_download_buffer_chain)); |
| gst_pad_set_activatemode_function (dlbuf->sinkpad, |
| GST_DEBUG_FUNCPTR (gst_download_buffer_sink_activate_mode)); |
| gst_pad_set_event_function (dlbuf->sinkpad, |
| GST_DEBUG_FUNCPTR (gst_download_buffer_handle_sink_event)); |
| gst_pad_set_query_function (dlbuf->sinkpad, |
| GST_DEBUG_FUNCPTR (gst_download_buffer_handle_sink_query)); |
| GST_PAD_SET_PROXY_CAPS (dlbuf->sinkpad); |
| gst_element_add_pad (GST_ELEMENT (dlbuf), dlbuf->sinkpad); |
| |
| dlbuf->srcpad = gst_pad_new_from_static_template (&srctemplate, "src"); |
| |
| gst_pad_set_activatemode_function (dlbuf->srcpad, |
| GST_DEBUG_FUNCPTR (gst_download_buffer_src_activate_mode)); |
| gst_pad_set_getrange_function (dlbuf->srcpad, |
| GST_DEBUG_FUNCPTR (gst_download_buffer_get_range)); |
| gst_pad_set_event_function (dlbuf->srcpad, |
| GST_DEBUG_FUNCPTR (gst_download_buffer_handle_src_event)); |
| gst_pad_set_query_function (dlbuf->srcpad, |
| GST_DEBUG_FUNCPTR (gst_download_buffer_handle_src_query)); |
| GST_PAD_SET_PROXY_CAPS (dlbuf->srcpad); |
| gst_element_add_pad (GST_ELEMENT (dlbuf), dlbuf->srcpad); |
| |
| /* levels */ |
| GST_DOWNLOAD_BUFFER_CLEAR_LEVEL (dlbuf->cur_level); |
| dlbuf->max_level.bytes = DEFAULT_MAX_SIZE_BYTES; |
| dlbuf->max_level.time = DEFAULT_MAX_SIZE_TIME; |
| dlbuf->low_percent = DEFAULT_LOW_PERCENT; |
| dlbuf->high_percent = DEFAULT_HIGH_PERCENT; |
| |
| dlbuf->srcresult = GST_FLOW_FLUSHING; |
| dlbuf->sinkresult = GST_FLOW_FLUSHING; |
| dlbuf->in_timer = g_timer_new (); |
| dlbuf->out_timer = g_timer_new (); |
| |
| g_mutex_init (&dlbuf->qlock); |
| dlbuf->waiting_add = FALSE; |
| g_cond_init (&dlbuf->item_add); |
| |
| /* tempfile related */ |
| dlbuf->temp_template = NULL; |
| dlbuf->temp_location = NULL; |
| dlbuf->temp_remove = DEFAULT_TEMP_REMOVE; |
| } |
| |
| /* called only once, as opposed to dispose */ |
| static void |
| gst_download_buffer_finalize (GObject * object) |
| { |
| GstDownloadBuffer *dlbuf = GST_DOWNLOAD_BUFFER (object); |
| |
| g_mutex_clear (&dlbuf->qlock); |
| g_cond_clear (&dlbuf->item_add); |
| g_timer_destroy (dlbuf->in_timer); |
| g_timer_destroy (dlbuf->out_timer); |
| |
| /* temp_file path cleanup */ |
| g_free (dlbuf->temp_template); |
| g_free (dlbuf->temp_location); |
| |
| G_OBJECT_CLASS (parent_class)->finalize (object); |
| } |
| |
| static void |
| reset_positions (GstDownloadBuffer * dlbuf) |
| { |
| dlbuf->write_pos = 0; |
| dlbuf->read_pos = 0; |
| dlbuf->filling = TRUE; |
| dlbuf->buffering_percent = 0; |
| dlbuf->is_buffering = TRUE; |
| dlbuf->seeking = FALSE; |
| GST_DOWNLOAD_BUFFER_CLEAR_LEVEL (dlbuf->cur_level); |
| } |
| |
| static void |
| reset_rate_timer (GstDownloadBuffer * dlbuf) |
| { |
| dlbuf->bytes_in = 0; |
| dlbuf->bytes_out = 0; |
| dlbuf->byte_in_rate = 0.0; |
| dlbuf->byte_in_period = 0; |
| dlbuf->byte_out_rate = 0.0; |
| dlbuf->last_in_elapsed = 0.0; |
| dlbuf->last_out_elapsed = 0.0; |
| dlbuf->in_timer_started = FALSE; |
| dlbuf->out_timer_started = FALSE; |
| } |
| |
| /* the interval in seconds to recalculate the rate */ |
| #define RATE_INTERVAL 0.2 |
| /* Tuning for rate estimation. We use a large window for the input rate because |
| * it should be stable when connected to a network. The output rate is less |
| * stable (the elements preroll, queues behind a demuxer fill, ...) and should |
| * therefore adapt more quickly. |
| * However, initial input rate may be subject to a burst, and should therefore |
| * initially also adapt more quickly to changes, and only later on give higher |
| * weight to previous values. */ |
| #define AVG_IN(avg,val,w1,w2) ((avg) * (w1) + (val) * (w2)) / ((w1) + (w2)) |
| #define AVG_OUT(avg,val) ((avg) * 3.0 + (val)) / 4.0 |
| |
| static void |
| update_levels (GstDownloadBuffer * dlbuf, guint bytes) |
| { |
| dlbuf->cur_level.bytes = bytes; |
| |
| if (dlbuf->byte_in_rate > 0.0) { |
| dlbuf->cur_level.time = |
| dlbuf->cur_level.bytes / dlbuf->byte_in_rate * GST_SECOND; |
| } |
| |
| GST_DEBUG ("levels: bytes %u/%u, time %" GST_TIME_FORMAT "/%" GST_TIME_FORMAT, |
| dlbuf->cur_level.bytes, dlbuf->max_level.bytes, |
| GST_TIME_ARGS (dlbuf->cur_level.time), |
| GST_TIME_ARGS (dlbuf->max_level.time)); |
| } |
| |
| static void |
| update_in_rates (GstDownloadBuffer * dlbuf) |
| { |
| gdouble elapsed, period; |
| gdouble byte_in_rate; |
| |
| if (!dlbuf->in_timer_started) { |
| dlbuf->in_timer_started = TRUE; |
| g_timer_start (dlbuf->in_timer); |
| return; |
| } |
| |
| elapsed = g_timer_elapsed (dlbuf->in_timer, NULL); |
| |
| /* recalc after each interval. */ |
| if (dlbuf->last_in_elapsed + RATE_INTERVAL < elapsed) { |
| period = elapsed - dlbuf->last_in_elapsed; |
| |
| GST_DEBUG_OBJECT (dlbuf, |
| "rates: period %f, in %" G_GUINT64_FORMAT ", global period %f", |
| period, dlbuf->bytes_in, dlbuf->byte_in_period); |
| |
| byte_in_rate = dlbuf->bytes_in / period; |
| |
| if (dlbuf->byte_in_rate == 0.0) |
| dlbuf->byte_in_rate = byte_in_rate; |
| else |
| dlbuf->byte_in_rate = AVG_IN (dlbuf->byte_in_rate, byte_in_rate, |
| (double) dlbuf->byte_in_period, period); |
| |
| /* another data point, cap at 16 for long time running average */ |
| if (dlbuf->byte_in_period < 16 * RATE_INTERVAL) |
| dlbuf->byte_in_period += period; |
| |
| /* reset the values to calculate rate over the next interval */ |
| dlbuf->last_in_elapsed = elapsed; |
| dlbuf->bytes_in = 0; |
| GST_DEBUG_OBJECT (dlbuf, "rates: in %f", dlbuf->byte_in_rate); |
| } |
| } |
| |
| static void |
| update_out_rates (GstDownloadBuffer * dlbuf) |
| { |
| gdouble elapsed, period; |
| gdouble byte_out_rate; |
| |
| if (!dlbuf->out_timer_started) { |
| dlbuf->out_timer_started = TRUE; |
| g_timer_start (dlbuf->out_timer); |
| return; |
| } |
| |
| elapsed = g_timer_elapsed (dlbuf->out_timer, NULL); |
| |
| /* recalc after each interval. */ |
| if (dlbuf->last_out_elapsed + RATE_INTERVAL < elapsed) { |
| period = elapsed - dlbuf->last_out_elapsed; |
| |
| GST_DEBUG_OBJECT (dlbuf, |
| "rates: period %f, out %" G_GUINT64_FORMAT, period, dlbuf->bytes_out); |
| |
| byte_out_rate = dlbuf->bytes_out / period; |
| |
| if (dlbuf->byte_out_rate == 0.0) |
| dlbuf->byte_out_rate = byte_out_rate; |
| else |
| dlbuf->byte_out_rate = AVG_OUT (dlbuf->byte_out_rate, byte_out_rate); |
| |
| /* reset the values to calculate rate over the next interval */ |
| dlbuf->last_out_elapsed = elapsed; |
| dlbuf->bytes_out = 0; |
| GST_DEBUG_OBJECT (dlbuf, "rates: out %f", dlbuf->byte_out_rate); |
| } |
| } |
| |
| static gboolean |
| get_buffering_percent (GstDownloadBuffer * dlbuf, gboolean * is_buffering, |
| gint * percent) |
| { |
| gint perc; |
| |
| if (dlbuf->high_percent <= 0) { |
| if (percent) |
| *percent = 100; |
| if (is_buffering) |
| *is_buffering = FALSE; |
| return FALSE; |
| } |
| |
| /* Ensure the variables used to calculate buffering state are up-to-date. */ |
| update_in_rates (dlbuf); |
| update_out_rates (dlbuf); |
| |
| /* figure out the percent we are filled, we take the max of all formats. */ |
| if (dlbuf->max_level.bytes > 0) { |
| if (dlbuf->cur_level.bytes >= dlbuf->max_level.bytes) |
| perc = 100; |
| else |
| perc = dlbuf->cur_level.bytes * 100 / dlbuf->max_level.bytes; |
| } else |
| perc = 0; |
| |
| if (dlbuf->max_level.time > 0) { |
| if (dlbuf->cur_level.time >= dlbuf->max_level.time) |
| perc = 100; |
| else |
| perc = MAX (perc, dlbuf->cur_level.time * 100 / dlbuf->max_level.time); |
| } else |
| perc = MAX (0, perc); |
| |
| if (is_buffering) |
| *is_buffering = dlbuf->is_buffering; |
| |
| /* scale to high percent so that it becomes the 100% mark */ |
| perc = perc * 100 / dlbuf->high_percent; |
| /* clip */ |
| if (perc > 100) |
| perc = 100; |
| |
| if (percent) |
| *percent = perc; |
| |
| GST_DEBUG_OBJECT (dlbuf, "buffering %d, percent %d", dlbuf->is_buffering, |
| perc); |
| |
| return TRUE; |
| } |
| |
| static void |
| get_buffering_stats (GstDownloadBuffer * dlbuf, gint percent, |
| GstBufferingMode * mode, gint * avg_in, gint * avg_out, |
| gint64 * buffering_left) |
| { |
| if (mode) |
| *mode = GST_BUFFERING_DOWNLOAD; |
| |
| if (avg_in) |
| *avg_in = dlbuf->byte_in_rate; |
| if (avg_out) |
| *avg_out = dlbuf->byte_out_rate; |
| |
| if (buffering_left) { |
| guint64 max, cur; |
| |
| *buffering_left = (percent == 100 ? 0 : -1); |
| |
| max = dlbuf->max_level.time; |
| cur = dlbuf->cur_level.time; |
| |
| if (percent != 100 && max > cur) |
| *buffering_left = (max - cur) / 1000000; |
| } |
| } |
| |
| static GstMessage * |
| update_buffering (GstDownloadBuffer * dlbuf) |
| { |
| gint percent; |
| gboolean post = FALSE; |
| GstMessage *message = NULL; |
| |
| if (!get_buffering_percent (dlbuf, NULL, &percent)) |
| return NULL; |
| |
| if (dlbuf->is_buffering) { |
| post = TRUE; |
| /* if we were buffering see if we reached the high watermark */ |
| if (percent >= dlbuf->high_percent) |
| dlbuf->is_buffering = FALSE; |
| } else { |
| /* we were not buffering, check if we need to start buffering if we drop |
| * below the low threshold */ |
| if (percent < dlbuf->low_percent) { |
| dlbuf->is_buffering = TRUE; |
| post = TRUE; |
| } |
| } |
| |
| if (post) { |
| if (percent == dlbuf->buffering_percent) |
| post = FALSE; |
| else |
| dlbuf->buffering_percent = percent; |
| } |
| |
| if (post) { |
| GstBufferingMode mode; |
| gint avg_in, avg_out; |
| gint64 buffering_left; |
| |
| get_buffering_stats (dlbuf, percent, &mode, &avg_in, &avg_out, |
| &buffering_left); |
| |
| message = gst_message_new_buffering (GST_OBJECT_CAST (dlbuf), |
| (gint) percent); |
| gst_message_set_buffering_stats (message, mode, |
| avg_in, avg_out, buffering_left); |
| } |
| |
| return message; |
| } |
| |
| static gboolean |
| perform_seek_to_offset (GstDownloadBuffer * dlbuf, guint64 offset) |
| { |
| GstEvent *event; |
| gboolean res; |
| |
| if (dlbuf->seeking) |
| return TRUE; |
| |
| /* until we receive the FLUSH_STOP from this seek, we skip data */ |
| dlbuf->seeking = TRUE; |
| dlbuf->write_pos = offset; |
| dlbuf->filling = FALSE; |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| |
| GST_DEBUG_OBJECT (dlbuf, "Seeking to %" G_GUINT64_FORMAT, offset); |
| |
| event = |
| gst_event_new_seek (1.0, GST_FORMAT_BYTES, |
| GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_ACCURATE, GST_SEEK_TYPE_SET, offset, |
| GST_SEEK_TYPE_NONE, -1); |
| |
| res = gst_pad_push_event (dlbuf->sinkpad, event); |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| |
| return res; |
| } |
| |
| /* get the threshold for when we decide to seek rather than wait */ |
| static guint64 |
| get_seek_threshold (GstDownloadBuffer * dlbuf) |
| { |
| guint64 threshold; |
| |
| /* FIXME, find a good threshold based on the incoming rate. */ |
| threshold = 1024 * 512; |
| |
| return threshold; |
| } |
| |
| /* called with DOWNLOAD_BUFFER_MUTEX */ |
| static void |
| gst_download_buffer_update_upstream_size (GstDownloadBuffer * dlbuf) |
| { |
| gint64 upstream_size = 0; |
| |
| if (gst_pad_peer_query_duration (dlbuf->sinkpad, GST_FORMAT_BYTES, |
| &upstream_size)) { |
| GST_INFO_OBJECT (dlbuf, "upstream size: %" G_GINT64_FORMAT, upstream_size); |
| dlbuf->upstream_size = upstream_size; |
| } |
| } |
| |
| /* called with DOWNLOAD_BUFFER_MUTEX */ |
| static GstFlowReturn |
| gst_download_buffer_wait_for_data (GstDownloadBuffer * dlbuf, guint64 offset, |
| guint length) |
| { |
| gsize start, stop; |
| guint64 wanted; |
| gboolean started; |
| |
| GST_DEBUG_OBJECT (dlbuf, "wait for %" G_GUINT64_FORMAT ", length %u", |
| offset, length); |
| |
| wanted = offset + length; |
| |
| /* pause the timer while we wait. The fact that we are waiting does not mean |
| * the byterate on the output pad is lower */ |
| if ((started = dlbuf->out_timer_started)) |
| g_timer_stop (dlbuf->out_timer); |
| |
| /* check range before us */ |
| if (gst_sparse_file_get_range_before (dlbuf->file, offset, &start, &stop)) { |
| GST_DEBUG_OBJECT (dlbuf, |
| "range before %" G_GSIZE_FORMAT " - %" G_GSIZE_FORMAT, start, stop); |
| if (start <= offset && offset < stop) { |
| GST_DEBUG_OBJECT (dlbuf, "we have the offset"); |
| /* we have the range, continue it */ |
| offset = stop; |
| } else { |
| guint64 threshold, dist; |
| |
| /* there is a range before us, check how far away it is */ |
| threshold = get_seek_threshold (dlbuf); |
| dist = offset - stop; |
| |
| if (dist <= threshold) { |
| GST_DEBUG_OBJECT (dlbuf, "not too far"); |
| /* not far away, continue it */ |
| offset = stop; |
| } |
| } |
| } |
| |
| if (dlbuf->write_pos != offset) |
| perform_seek_to_offset (dlbuf, offset); |
| |
| dlbuf->filling = TRUE; |
| if (dlbuf->write_pos > dlbuf->read_pos) |
| update_levels (dlbuf, dlbuf->write_pos - dlbuf->read_pos); |
| else |
| update_levels (dlbuf, 0); |
| |
| /* now wait for more data */ |
| GST_DEBUG_OBJECT (dlbuf, "waiting for more data"); |
| GST_DOWNLOAD_BUFFER_WAIT_ADD_CHECK (dlbuf, dlbuf->srcresult, wanted, |
| out_flushing); |
| GST_DEBUG_OBJECT (dlbuf, "got more data"); |
| |
| /* and continue if we were running before */ |
| if (started) |
| g_timer_continue (dlbuf->out_timer); |
| |
| return GST_FLOW_OK; |
| |
| out_flushing: |
| { |
| GST_DEBUG_OBJECT (dlbuf, "we are flushing"); |
| return GST_FLOW_FLUSHING; |
| } |
| } |
| |
| /* called with DOWNLOAD_BUFFER_MUTEX */ |
| static gboolean |
| check_upstream_size (GstDownloadBuffer * dlbuf, gsize offset, guint * length) |
| { |
| gsize stop = offset + *length; |
| /* catch any reads beyond the size of the file here to make sure cache |
| * doesn't send seek events beyond the size of the file upstream, since |
| * that would confuse elements such as souphttpsrc and/or http servers. |
| * Demuxers often just loop until EOS at the end of the file to figure out |
| * when they've read all the end-headers or index chunks. */ |
| if (G_UNLIKELY (dlbuf->upstream_size == -1 || stop >= dlbuf->upstream_size)) { |
| gst_download_buffer_update_upstream_size (dlbuf); |
| } |
| |
| if (dlbuf->upstream_size != -1) { |
| if (offset >= dlbuf->upstream_size) |
| return FALSE; |
| |
| if (G_UNLIKELY (stop > dlbuf->upstream_size)) { |
| *length = dlbuf->upstream_size - offset; |
| GST_DEBUG_OBJECT (dlbuf, "adjusting length downto %u", *length); |
| } |
| } |
| return TRUE; |
| } |
| |
| /* called with DOWNLOAD_BUFFER_MUTEX */ |
| static GstFlowReturn |
| gst_download_buffer_read_buffer (GstDownloadBuffer * dlbuf, guint64 offset, |
| guint length, GstBuffer ** buffer) |
| { |
| GstBuffer *buf; |
| GstMapInfo info; |
| GstFlowReturn ret = GST_FLOW_OK; |
| gsize res, remaining; |
| GError *error = NULL; |
| |
| length = (length == -1) ? DEFAULT_BUFFER_SIZE : length; |
| offset = (offset == -1) ? dlbuf->read_pos : offset; |
| |
| if (!check_upstream_size (dlbuf, offset, &length)) |
| goto hit_eos; |
| |
| /* allocate the output buffer of the requested size */ |
| if (*buffer == NULL) |
| buf = gst_buffer_new_allocate (NULL, length, NULL); |
| else |
| buf = *buffer; |
| |
| gst_buffer_map (buf, &info, GST_MAP_WRITE); |
| |
| GST_DEBUG_OBJECT (dlbuf, "Reading %u bytes from %" G_GUINT64_FORMAT, length, |
| offset); |
| |
| dlbuf->read_pos = offset; |
| |
| do { |
| res = |
| gst_sparse_file_read (dlbuf->file, offset, info.data, length, |
| &remaining, &error); |
| if (G_UNLIKELY (res == 0)) { |
| switch (error->code) { |
| case GST_SPARSE_FILE_IO_ERROR_WOULD_BLOCK: |
| /* we don't have the requested data in the file, decide what to |
| * do next. */ |
| ret = gst_download_buffer_wait_for_data (dlbuf, offset, length); |
| if (ret != GST_FLOW_OK) |
| goto out_flushing; |
| break; |
| default: |
| goto read_error; |
| } |
| g_clear_error (&error); |
| } |
| } while (res == 0); |
| |
| gst_buffer_unmap (buf, &info); |
| gst_buffer_resize (buf, 0, res); |
| |
| dlbuf->bytes_out += res; |
| dlbuf->read_pos += res; |
| |
| GST_DEBUG_OBJECT (dlbuf, |
| "Read %" G_GSIZE_FORMAT " bytes, remaining %" G_GSIZE_FORMAT, res, |
| remaining); |
| |
| if (dlbuf->read_pos + remaining == dlbuf->upstream_size) |
| update_levels (dlbuf, dlbuf->max_level.bytes); |
| else |
| update_levels (dlbuf, remaining); |
| |
| GST_BUFFER_OFFSET (buf) = offset; |
| GST_BUFFER_OFFSET_END (buf) = offset + res; |
| |
| *buffer = buf; |
| |
| return ret; |
| |
| /* ERRORS */ |
| hit_eos: |
| { |
| GST_DEBUG_OBJECT (dlbuf, "EOS hit"); |
| return GST_FLOW_EOS; |
| } |
| out_flushing: |
| { |
| GST_DEBUG_OBJECT (dlbuf, "we are flushing"); |
| g_clear_error (&error); |
| gst_buffer_unmap (buf, &info); |
| if (*buffer == NULL) |
| gst_buffer_unref (buf); |
| return GST_FLOW_FLUSHING; |
| } |
| read_error: |
| { |
| GST_DEBUG_OBJECT (dlbuf, "we have a read error: %s", error->message); |
| g_clear_error (&error); |
| gst_buffer_unmap (buf, &info); |
| if (*buffer == NULL) |
| gst_buffer_unref (buf); |
| return ret; |
| } |
| } |
| |
| /* must be called with MUTEX_LOCK. Will briefly release the lock when notifying |
| * the temp filename. */ |
| static gboolean |
| gst_download_buffer_open_temp_location_file (GstDownloadBuffer * dlbuf) |
| { |
| gint fd = -1; |
| gchar *name = NULL; |
| |
| if (dlbuf->file) |
| goto already_opened; |
| |
| GST_DEBUG_OBJECT (dlbuf, "opening temp file %s", dlbuf->temp_template); |
| |
| /* If temp_template was set, allocate a filename and open that file */ |
| |
| /* nothing to do */ |
| if (dlbuf->temp_template == NULL) |
| goto no_directory; |
| |
| /* make copy of the template, we don't want to change this */ |
| name = g_strdup (dlbuf->temp_template); |
| #ifdef __BIONIC__ |
| fd = g_mkstemp_full (name, O_RDWR | O_LARGEFILE, S_IRUSR | S_IWUSR); |
| #else |
| fd = g_mkstemp (name); |
| #endif |
| if (fd == -1) |
| goto mkstemp_failed; |
| |
| /* open the file for update/writing */ |
| dlbuf->file = gst_sparse_file_new (); |
| /* error creating file */ |
| if (!gst_sparse_file_set_fd (dlbuf->file, fd)) |
| goto open_failed; |
| |
| g_free (dlbuf->temp_location); |
| dlbuf->temp_location = name; |
| dlbuf->temp_fd = fd; |
| reset_positions (dlbuf); |
| |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| |
| /* we can't emit the notify with the lock */ |
| g_object_notify (G_OBJECT (dlbuf), "temp-location"); |
| |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| |
| GST_DEBUG_OBJECT (dlbuf, "opened temp file %s", dlbuf->temp_template); |
| |
| return TRUE; |
| |
| /* ERRORS */ |
| already_opened: |
| { |
| GST_DEBUG_OBJECT (dlbuf, "temp file was already open"); |
| return TRUE; |
| } |
| no_directory: |
| { |
| GST_ELEMENT_ERROR (dlbuf, RESOURCE, NOT_FOUND, |
| (_("No Temp directory specified.")), (NULL)); |
| return FALSE; |
| } |
| mkstemp_failed: |
| { |
| GST_ELEMENT_ERROR (dlbuf, RESOURCE, OPEN_READ, |
| (_("Could not create temp file \"%s\"."), dlbuf->temp_template), |
| GST_ERROR_SYSTEM); |
| g_free (name); |
| return FALSE; |
| } |
| open_failed: |
| { |
| GST_ELEMENT_ERROR (dlbuf, RESOURCE, OPEN_READ, |
| (_("Could not open file \"%s\" for reading."), name), GST_ERROR_SYSTEM); |
| g_free (name); |
| if (fd != -1) |
| close (fd); |
| return FALSE; |
| } |
| } |
| |
| static void |
| gst_download_buffer_close_temp_location_file (GstDownloadBuffer * dlbuf) |
| { |
| /* nothing to do */ |
| if (dlbuf->file == NULL) |
| return; |
| |
| GST_DEBUG_OBJECT (dlbuf, "closing sparse file"); |
| |
| if (dlbuf->temp_remove) { |
| if (remove (dlbuf->temp_location) < 0) { |
| GST_WARNING_OBJECT (dlbuf, "Failed to remove temporary file %s: %s", |
| dlbuf->temp_location, g_strerror (errno)); |
| } |
| } |
| gst_sparse_file_free (dlbuf->file); |
| close (dlbuf->temp_fd); |
| dlbuf->file = NULL; |
| } |
| |
| static void |
| gst_download_buffer_flush_temp_file (GstDownloadBuffer * dlbuf) |
| { |
| if (dlbuf->file == NULL) |
| return; |
| |
| GST_DEBUG_OBJECT (dlbuf, "flushing temp file"); |
| |
| gst_sparse_file_clear (dlbuf->file); |
| } |
| |
| static void |
| gst_download_buffer_locked_flush (GstDownloadBuffer * dlbuf, gboolean full, |
| gboolean clear_temp) |
| { |
| if (clear_temp) |
| gst_download_buffer_flush_temp_file (dlbuf); |
| reset_positions (dlbuf); |
| gst_event_replace (&dlbuf->stream_start_event, NULL); |
| gst_event_replace (&dlbuf->segment_event, NULL); |
| } |
| |
| static gboolean |
| gst_download_buffer_handle_sink_event (GstPad * pad, GstObject * parent, |
| GstEvent * event) |
| { |
| gboolean ret = TRUE; |
| GstDownloadBuffer *dlbuf; |
| |
| dlbuf = GST_DOWNLOAD_BUFFER (parent); |
| |
| switch (GST_EVENT_TYPE (event)) { |
| case GST_EVENT_FLUSH_START: |
| { |
| GST_LOG_OBJECT (dlbuf, "received flush start event"); |
| if (GST_PAD_MODE (dlbuf->srcpad) == GST_PAD_MODE_PUSH) { |
| /* forward event */ |
| ret = gst_pad_push_event (dlbuf->srcpad, event); |
| |
| /* now unblock the chain function */ |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| dlbuf->srcresult = GST_FLOW_FLUSHING; |
| dlbuf->sinkresult = GST_FLOW_FLUSHING; |
| /* unblock the loop and chain functions */ |
| GST_DOWNLOAD_BUFFER_SIGNAL_ADD (dlbuf, -1); |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| |
| /* make sure it pauses, this should happen since we sent |
| * flush_start downstream. */ |
| gst_pad_pause_task (dlbuf->srcpad); |
| GST_LOG_OBJECT (dlbuf, "loop stopped"); |
| } else { |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| /* flush the sink pad */ |
| dlbuf->sinkresult = GST_FLOW_FLUSHING; |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| |
| gst_event_unref (event); |
| } |
| break; |
| } |
| case GST_EVENT_FLUSH_STOP: |
| { |
| GST_LOG_OBJECT (dlbuf, "received flush stop event"); |
| |
| if (GST_PAD_MODE (dlbuf->srcpad) == GST_PAD_MODE_PUSH) { |
| /* forward event */ |
| ret = gst_pad_push_event (dlbuf->srcpad, event); |
| |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| gst_download_buffer_locked_flush (dlbuf, FALSE, TRUE); |
| dlbuf->srcresult = GST_FLOW_OK; |
| dlbuf->sinkresult = GST_FLOW_OK; |
| dlbuf->unexpected = FALSE; |
| dlbuf->seeking = FALSE; |
| /* reset rate counters */ |
| reset_rate_timer (dlbuf); |
| gst_pad_start_task (dlbuf->srcpad, |
| (GstTaskFunction) gst_download_buffer_loop, dlbuf->srcpad, NULL); |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| } else { |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| dlbuf->unexpected = FALSE; |
| dlbuf->sinkresult = GST_FLOW_OK; |
| dlbuf->seeking = FALSE; |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| |
| gst_event_unref (event); |
| } |
| break; |
| } |
| default: |
| if (GST_EVENT_IS_SERIALIZED (event)) { |
| GstMessage *msg = NULL; |
| |
| /* serialized events go in the buffer */ |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK_CHECK (dlbuf, dlbuf->sinkresult, |
| out_flushing); |
| switch (GST_EVENT_TYPE (event)) { |
| case GST_EVENT_EOS: |
| GST_DEBUG_OBJECT (dlbuf, "we have EOS"); |
| /* Zero the thresholds, this makes sure the dlbuf is completely |
| * filled and we can read all data from the dlbuf. */ |
| /* update the buffering status */ |
| update_levels (dlbuf, dlbuf->max_level.bytes); |
| /* update the buffering */ |
| msg = update_buffering (dlbuf); |
| /* wakeup the waiter and let it recheck */ |
| GST_DOWNLOAD_BUFFER_SIGNAL_ADD (dlbuf, -1); |
| break; |
| case GST_EVENT_SEGMENT: |
| gst_event_replace (&dlbuf->segment_event, event); |
| /* a new segment allows us to accept more buffers if we got EOS |
| * from downstream */ |
| dlbuf->unexpected = FALSE; |
| break; |
| case GST_EVENT_STREAM_START: |
| gst_event_replace (&dlbuf->stream_start_event, event); |
| break; |
| default: |
| break; |
| } |
| gst_event_unref (event); |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| if (msg != NULL) |
| gst_element_post_message (GST_ELEMENT_CAST (dlbuf), msg); |
| } else { |
| /* non-serialized events are passed upstream. */ |
| ret = gst_pad_push_event (dlbuf->srcpad, event); |
| } |
| break; |
| } |
| return ret; |
| |
| /* ERRORS */ |
| out_flushing: |
| { |
| GST_DEBUG_OBJECT (dlbuf, "refusing event, we are flushing"); |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| gst_event_unref (event); |
| return FALSE; |
| } |
| } |
| |
| static gboolean |
| gst_download_buffer_handle_sink_query (GstPad * pad, GstObject * parent, |
| GstQuery * query) |
| { |
| GstDownloadBuffer *dlbuf; |
| gboolean res; |
| |
| dlbuf = GST_DOWNLOAD_BUFFER (parent); |
| |
| switch (GST_QUERY_TYPE (query)) { |
| default: |
| if (GST_QUERY_IS_SERIALIZED (query)) { |
| GST_LOG_OBJECT (dlbuf, "received query %p", query); |
| GST_DEBUG_OBJECT (dlbuf, "refusing query, we are not using the dlbuf"); |
| res = FALSE; |
| } else { |
| res = gst_pad_query_default (pad, parent, query); |
| } |
| break; |
| } |
| return res; |
| } |
| |
| static GstFlowReturn |
| gst_download_buffer_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer) |
| { |
| GstDownloadBuffer *dlbuf; |
| GstMapInfo info; |
| guint64 offset; |
| gsize res, available; |
| GError *error = NULL; |
| GstMessage *msg = NULL; |
| |
| dlbuf = GST_DOWNLOAD_BUFFER (parent); |
| |
| GST_LOG_OBJECT (dlbuf, "received buffer %p of " |
| "size %" G_GSIZE_FORMAT ", time %" GST_TIME_FORMAT ", duration %" |
| GST_TIME_FORMAT, buffer, gst_buffer_get_size (buffer), |
| GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)), |
| GST_TIME_ARGS (GST_BUFFER_DURATION (buffer))); |
| |
| /* we have to lock the dlbuf since we span threads */ |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK_CHECK (dlbuf, dlbuf->sinkresult, out_flushing); |
| /* when we received unexpected from downstream, refuse more buffers */ |
| if (dlbuf->unexpected) |
| goto out_eos; |
| |
| /* while we didn't receive the newsegment, we're seeking and we skip data */ |
| if (dlbuf->seeking) |
| goto out_seeking; |
| |
| /* put buffer in dlbuf now */ |
| offset = dlbuf->write_pos; |
| |
| /* sanity check */ |
| if (GST_BUFFER_OFFSET_IS_VALID (buffer) && |
| GST_BUFFER_OFFSET (buffer) != offset) { |
| GST_WARNING_OBJECT (dlbuf, "buffer offset does not match current writing " |
| "position! %" G_GINT64_FORMAT " != %" G_GINT64_FORMAT, |
| GST_BUFFER_OFFSET (buffer), offset); |
| } |
| |
| gst_buffer_map (buffer, &info, GST_MAP_READ); |
| |
| GST_DEBUG_OBJECT (dlbuf, "Writing %" G_GSIZE_FORMAT " bytes to %" |
| G_GUINT64_FORMAT, info.size, offset); |
| |
| res = |
| gst_sparse_file_write (dlbuf->file, offset, info.data, info.size, |
| &available, &error); |
| if (res == 0) |
| goto write_error; |
| |
| gst_buffer_unmap (buffer, &info); |
| gst_buffer_unref (buffer); |
| |
| dlbuf->write_pos = offset + info.size; |
| dlbuf->bytes_in += info.size; |
| |
| GST_DOWNLOAD_BUFFER_SIGNAL_ADD (dlbuf, dlbuf->write_pos + available); |
| |
| /* we hit the end, see what to do */ |
| if (dlbuf->write_pos + available == dlbuf->upstream_size) { |
| gsize start, stop; |
| |
| /* we have everything up to the end, find a region to fill */ |
| if (gst_sparse_file_get_range_after (dlbuf->file, 0, &start, &stop)) { |
| if (stop < dlbuf->upstream_size) { |
| /* a hole to fill, seek to its end */ |
| perform_seek_to_offset (dlbuf, stop); |
| } else { |
| /* we filled all the holes, we are done */ |
| goto completed; |
| } |
| } |
| } else { |
| /* see if we need to skip this region or just read it again. The idea |
| * is that when the region is not big, we want to avoid a seek and just |
| * let it reread */ |
| guint64 threshold = get_seek_threshold (dlbuf); |
| |
| if (available > threshold) { |
| /* further than threshold, it's better to skip than to reread */ |
| perform_seek_to_offset (dlbuf, dlbuf->write_pos + available); |
| } |
| } |
| if (dlbuf->filling) { |
| if (dlbuf->write_pos > dlbuf->read_pos) |
| update_levels (dlbuf, dlbuf->write_pos - dlbuf->read_pos); |
| else |
| update_levels (dlbuf, 0); |
| } |
| |
| /* update the buffering */ |
| msg = update_buffering (dlbuf); |
| |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| |
| if (msg != NULL) |
| gst_element_post_message (GST_ELEMENT_CAST (dlbuf), msg); |
| |
| return GST_FLOW_OK; |
| |
| /* ERRORS */ |
| out_flushing: |
| { |
| GstFlowReturn ret = dlbuf->sinkresult; |
| GST_LOG_OBJECT (dlbuf, |
| "exit because task paused, reason: %s", gst_flow_get_name (ret)); |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| gst_buffer_unref (buffer); |
| return ret; |
| } |
| out_eos: |
| { |
| GST_LOG_OBJECT (dlbuf, "exit because we received EOS"); |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| gst_buffer_unref (buffer); |
| return GST_FLOW_EOS; |
| } |
| out_seeking: |
| { |
| GST_LOG_OBJECT (dlbuf, "exit because we are seeking"); |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| gst_buffer_unref (buffer); |
| return GST_FLOW_OK; |
| } |
| write_error: |
| { |
| gst_buffer_unmap (buffer, &info); |
| gst_buffer_unref (buffer); |
| GST_ELEMENT_ERROR (dlbuf, RESOURCE, WRITE, |
| (_("Error while writing to download file.")), ("%s", error->message)); |
| g_clear_error (&error); |
| return GST_FLOW_ERROR; |
| } |
| completed: |
| { |
| GST_LOG_OBJECT (dlbuf, "we completed the download"); |
| dlbuf->write_pos = dlbuf->upstream_size; |
| dlbuf->filling = FALSE; |
| update_levels (dlbuf, dlbuf->max_level.bytes); |
| msg = update_buffering (dlbuf); |
| |
| gst_element_post_message (GST_ELEMENT_CAST (dlbuf), |
| gst_message_new_element (GST_OBJECT_CAST (dlbuf), |
| gst_structure_new ("GstCacheDownloadComplete", |
| "location", G_TYPE_STRING, dlbuf->temp_location, NULL))); |
| |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| |
| if (msg != NULL) |
| gst_element_post_message (GST_ELEMENT_CAST (dlbuf), msg); |
| |
| return GST_FLOW_EOS; |
| } |
| } |
| |
| /* called repeatedly with @pad as the source pad. This function should push out |
| * data to the peer element. */ |
| static void |
| gst_download_buffer_loop (GstPad * pad) |
| { |
| GstDownloadBuffer *dlbuf; |
| GstFlowReturn ret; |
| GstBuffer *buffer = NULL; |
| GstMessage *msg = NULL; |
| |
| dlbuf = GST_DOWNLOAD_BUFFER (GST_PAD_PARENT (pad)); |
| |
| /* have to lock for thread-safety */ |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK_CHECK (dlbuf, dlbuf->srcresult, out_flushing); |
| |
| if (dlbuf->stream_start_event != NULL) { |
| gst_pad_push_event (dlbuf->srcpad, dlbuf->stream_start_event); |
| dlbuf->stream_start_event = NULL; |
| } |
| if (dlbuf->segment_event != NULL) { |
| gst_pad_push_event (dlbuf->srcpad, dlbuf->segment_event); |
| dlbuf->segment_event = NULL; |
| } |
| |
| ret = gst_download_buffer_read_buffer (dlbuf, -1, -1, &buffer); |
| if (ret != GST_FLOW_OK) |
| goto out_flushing; |
| |
| /* update the buffering */ |
| msg = update_buffering (dlbuf); |
| |
| g_atomic_int_set (&dlbuf->downstream_may_block, 1); |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| |
| if (msg != NULL) |
| gst_element_post_message (GST_ELEMENT_CAST (dlbuf), msg); |
| |
| ret = gst_pad_push (dlbuf->srcpad, buffer); |
| g_atomic_int_set (&dlbuf->downstream_may_block, 0); |
| |
| /* need to check for srcresult here as well */ |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK_CHECK (dlbuf, dlbuf->srcresult, out_flushing); |
| dlbuf->srcresult = ret; |
| dlbuf->sinkresult = ret; |
| if (ret != GST_FLOW_OK) |
| goto out_flushing; |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| |
| return; |
| |
| /* ERRORS */ |
| out_flushing: |
| { |
| GstFlowReturn ret = dlbuf->srcresult; |
| |
| gst_pad_pause_task (dlbuf->srcpad); |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| GST_LOG_OBJECT (dlbuf, "pause task, reason: %s", gst_flow_get_name (ret)); |
| /* let app know about us giving up if upstream is not expected to do so */ |
| if (ret == GST_FLOW_EOS) { |
| /* FIXME perform EOS logic, this is really a basesrc operating on a |
| * file. */ |
| gst_pad_push_event (dlbuf->srcpad, gst_event_new_eos ()); |
| } else if ((ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS)) { |
| GST_ELEMENT_FLOW_ERROR (dlbuf, ret); |
| gst_pad_push_event (dlbuf->srcpad, gst_event_new_eos ()); |
| } |
| return; |
| } |
| } |
| |
| static gboolean |
| gst_download_buffer_handle_src_event (GstPad * pad, GstObject * parent, |
| GstEvent * event) |
| { |
| gboolean res = TRUE; |
| GstDownloadBuffer *dlbuf = GST_DOWNLOAD_BUFFER (parent); |
| |
| #ifndef GST_DISABLE_GST_DEBUG |
| GST_DEBUG_OBJECT (dlbuf, "got event %p (%s)", |
| event, GST_EVENT_TYPE_NAME (event)); |
| #endif |
| |
| switch (GST_EVENT_TYPE (event)) { |
| case GST_EVENT_FLUSH_START: |
| /* now unblock the getrange function */ |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| GST_DEBUG_OBJECT (dlbuf, "flushing"); |
| dlbuf->srcresult = GST_FLOW_FLUSHING; |
| GST_DOWNLOAD_BUFFER_SIGNAL_ADD (dlbuf, -1); |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| |
| /* when using a temp file, we eat the event */ |
| res = TRUE; |
| gst_event_unref (event); |
| break; |
| case GST_EVENT_FLUSH_STOP: |
| /* now unblock the getrange function */ |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| dlbuf->srcresult = GST_FLOW_OK; |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| |
| /* when using a temp file, we eat the event */ |
| res = TRUE; |
| gst_event_unref (event); |
| break; |
| case GST_EVENT_RECONFIGURE: |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| /* assume downstream is linked now and try to push again */ |
| if (dlbuf->srcresult == GST_FLOW_NOT_LINKED) { |
| dlbuf->srcresult = GST_FLOW_OK; |
| dlbuf->sinkresult = GST_FLOW_OK; |
| if (GST_PAD_MODE (pad) == GST_PAD_MODE_PUSH) { |
| gst_pad_start_task (pad, (GstTaskFunction) gst_download_buffer_loop, |
| pad, NULL); |
| } |
| } |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| |
| res = gst_pad_push_event (dlbuf->sinkpad, event); |
| break; |
| default: |
| res = gst_pad_push_event (dlbuf->sinkpad, event); |
| break; |
| } |
| |
| return res; |
| } |
| |
| static gboolean |
| gst_download_buffer_handle_src_query (GstPad * pad, GstObject * parent, |
| GstQuery * query) |
| { |
| GstDownloadBuffer *dlbuf; |
| |
| dlbuf = GST_DOWNLOAD_BUFFER (parent); |
| |
| switch (GST_QUERY_TYPE (query)) { |
| case GST_QUERY_POSITION: |
| { |
| gint64 peer_pos; |
| GstFormat format; |
| |
| if (!gst_pad_peer_query (dlbuf->sinkpad, query)) |
| goto peer_failed; |
| |
| /* get peer position */ |
| gst_query_parse_position (query, &format, &peer_pos); |
| |
| /* FIXME: this code assumes that there's no discont in the dlbuf */ |
| switch (format) { |
| case GST_FORMAT_BYTES: |
| peer_pos -= dlbuf->cur_level.bytes; |
| if (peer_pos < 0) /* Clamp result to 0 */ |
| peer_pos = 0; |
| break; |
| case GST_FORMAT_TIME: |
| peer_pos -= dlbuf->cur_level.time; |
| if (peer_pos < 0) /* Clamp result to 0 */ |
| peer_pos = 0; |
| break; |
| default: |
| GST_WARNING_OBJECT (dlbuf, "dropping query in %s format, don't " |
| "know how to adjust value", gst_format_get_name (format)); |
| return FALSE; |
| } |
| /* set updated position */ |
| gst_query_set_position (query, format, peer_pos); |
| break; |
| } |
| case GST_QUERY_DURATION: |
| { |
| GST_DEBUG_OBJECT (dlbuf, "doing peer query"); |
| |
| if (!gst_pad_peer_query (dlbuf->sinkpad, query)) |
| goto peer_failed; |
| |
| GST_DEBUG_OBJECT (dlbuf, "peer query success"); |
| break; |
| } |
| case GST_QUERY_BUFFERING: |
| { |
| gint percent; |
| gboolean is_buffering; |
| GstBufferingMode mode; |
| gint avg_in, avg_out; |
| gint64 buffering_left; |
| |
| GST_DEBUG_OBJECT (dlbuf, "query buffering"); |
| |
| get_buffering_percent (dlbuf, &is_buffering, &percent); |
| gst_query_set_buffering_percent (query, is_buffering, percent); |
| |
| get_buffering_stats (dlbuf, percent, &mode, &avg_in, &avg_out, |
| &buffering_left); |
| gst_query_set_buffering_stats (query, mode, avg_in, avg_out, |
| buffering_left); |
| |
| { |
| /* add ranges for download and ringbuffer buffering */ |
| GstFormat format; |
| gint64 start, stop; |
| guint64 write_pos; |
| gint64 estimated_total; |
| gint64 duration; |
| gsize offset, range_start, range_stop; |
| |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| write_pos = dlbuf->write_pos; |
| |
| /* get duration of upstream in bytes */ |
| gst_download_buffer_update_upstream_size (dlbuf); |
| duration = dlbuf->upstream_size; |
| |
| GST_DEBUG_OBJECT (dlbuf, "percent %d, duration %" G_GINT64_FORMAT |
| ", writing %" G_GINT64_FORMAT, percent, duration, write_pos); |
| |
| gst_query_parse_buffering_range (query, &format, NULL, NULL, NULL); |
| |
| /* fill out the buffered ranges */ |
| start = offset = 0; |
| stop = -1; |
| estimated_total = -1; |
| while (gst_sparse_file_get_range_after (dlbuf->file, offset, |
| &range_start, &range_stop)) { |
| gboolean current_range; |
| |
| GST_DEBUG_OBJECT (dlbuf, |
| "range starting at %" G_GSIZE_FORMAT " and finishing at %" |
| G_GSIZE_FORMAT, range_start, range_stop); |
| |
| offset = range_stop; |
| |
| /* find the range we are currently downloading, we'll remember it |
| * after we convert to the target format */ |
| if (range_start <= write_pos && range_stop >= write_pos) { |
| current_range = TRUE; |
| /* calculate remaining and total download time */ |
| if (duration >= range_stop && avg_in > 0.0) |
| estimated_total = ((duration - range_stop) * 1000) / avg_in; |
| } else |
| current_range = FALSE; |
| |
| switch (format) { |
| case GST_FORMAT_PERCENT: |
| /* get our available data relative to the duration */ |
| if (duration == -1) { |
| range_start = 0; |
| range_stop = 0; |
| } else { |
| range_start = gst_util_uint64_scale (GST_FORMAT_PERCENT_MAX, |
| range_start, duration); |
| range_stop = gst_util_uint64_scale (GST_FORMAT_PERCENT_MAX, |
| range_stop, duration); |
| } |
| break; |
| case GST_FORMAT_BYTES: |
| break; |
| default: |
| range_start = -1; |
| range_stop = -1; |
| break; |
| } |
| |
| if (current_range) { |
| /* we are currently downloading this range */ |
| start = range_start; |
| stop = range_stop; |
| } |
| GST_DEBUG_OBJECT (dlbuf, |
| "range to format: %" G_GSIZE_FORMAT " - %" G_GSIZE_FORMAT, |
| range_start, range_stop); |
| if (range_start == range_stop) |
| continue; |
| gst_query_add_buffering_range (query, range_start, range_stop); |
| } |
| |
| GST_DEBUG_OBJECT (dlbuf, "estimated-total %" G_GINT64_FORMAT, |
| estimated_total); |
| |
| gst_query_set_buffering_range (query, format, start, stop, |
| estimated_total); |
| |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| } |
| break; |
| } |
| case GST_QUERY_SCHEDULING: |
| { |
| GstSchedulingFlags flags = 0; |
| |
| if (!gst_pad_peer_query (dlbuf->sinkpad, query)) |
| goto peer_failed; |
| |
| gst_query_parse_scheduling (query, &flags, NULL, NULL, NULL); |
| |
| /* we can operate in pull mode when we are using a tempfile */ |
| flags |= GST_SCHEDULING_FLAG_SEEKABLE; |
| gst_query_set_scheduling (query, flags, 0, -1, 0); |
| gst_query_add_scheduling_mode (query, GST_PAD_MODE_PULL); |
| gst_query_add_scheduling_mode (query, GST_PAD_MODE_PUSH); |
| break; |
| } |
| default: |
| /* peer handled other queries */ |
| if (!gst_pad_query_default (pad, parent, query)) |
| goto peer_failed; |
| break; |
| } |
| |
| return TRUE; |
| |
| /* ERRORS */ |
| peer_failed: |
| { |
| GST_DEBUG_OBJECT (dlbuf, "failed peer query"); |
| return FALSE; |
| } |
| } |
| |
| static gboolean |
| gst_download_buffer_handle_query (GstElement * element, GstQuery * query) |
| { |
| GstDownloadBuffer *dlbuf = GST_DOWNLOAD_BUFFER (element); |
| |
| /* simply forward to the srcpad query function */ |
| return gst_download_buffer_handle_src_query (dlbuf->srcpad, |
| GST_OBJECT_CAST (element), query); |
| } |
| |
| static GstFlowReturn |
| gst_download_buffer_get_range (GstPad * pad, GstObject * parent, guint64 offset, |
| guint length, GstBuffer ** buffer) |
| { |
| GstDownloadBuffer *dlbuf; |
| GstFlowReturn ret; |
| GstMessage *msg = NULL; |
| |
| dlbuf = GST_DOWNLOAD_BUFFER_CAST (parent); |
| |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK_CHECK (dlbuf, dlbuf->srcresult, out_flushing); |
| /* FIXME - function will block when the range is not yet available */ |
| ret = gst_download_buffer_read_buffer (dlbuf, offset, length, buffer); |
| /* update the buffering */ |
| msg = update_buffering (dlbuf); |
| |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| |
| if (msg != NULL) |
| gst_element_post_message (GST_ELEMENT_CAST (dlbuf), msg); |
| |
| return ret; |
| |
| /* ERRORS */ |
| out_flushing: |
| { |
| ret = dlbuf->srcresult; |
| |
| GST_DEBUG_OBJECT (dlbuf, "we are flushing"); |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| return ret; |
| } |
| } |
| |
| /* sink currently only operates in push mode */ |
| static gboolean |
| gst_download_buffer_sink_activate_mode (GstPad * pad, GstObject * parent, |
| GstPadMode mode, gboolean active) |
| { |
| gboolean result; |
| GstDownloadBuffer *dlbuf; |
| |
| dlbuf = GST_DOWNLOAD_BUFFER (parent); |
| |
| switch (mode) { |
| case GST_PAD_MODE_PUSH: |
| if (active) { |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| GST_DEBUG_OBJECT (dlbuf, "activating push mode"); |
| dlbuf->srcresult = GST_FLOW_OK; |
| dlbuf->sinkresult = GST_FLOW_OK; |
| dlbuf->unexpected = FALSE; |
| reset_rate_timer (dlbuf); |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| } else { |
| /* unblock chain function */ |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| GST_DEBUG_OBJECT (dlbuf, "deactivating push mode"); |
| dlbuf->srcresult = GST_FLOW_FLUSHING; |
| dlbuf->sinkresult = GST_FLOW_FLUSHING; |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| |
| /* wait until it is unblocked and clean up */ |
| GST_PAD_STREAM_LOCK (pad); |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| gst_download_buffer_locked_flush (dlbuf, TRUE, FALSE); |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| GST_PAD_STREAM_UNLOCK (pad); |
| } |
| result = TRUE; |
| break; |
| default: |
| result = FALSE; |
| break; |
| } |
| return result; |
| } |
| |
| /* src operating in push mode, we start a task on the source pad that pushes out |
| * buffers from the dlbuf */ |
| static gboolean |
| gst_download_buffer_src_activate_push (GstPad * pad, GstObject * parent, |
| gboolean active) |
| { |
| gboolean result = FALSE; |
| GstDownloadBuffer *dlbuf; |
| |
| dlbuf = GST_DOWNLOAD_BUFFER (parent); |
| |
| if (active) { |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| GST_DEBUG_OBJECT (dlbuf, "activating push mode"); |
| dlbuf->srcresult = GST_FLOW_OK; |
| dlbuf->sinkresult = GST_FLOW_OK; |
| dlbuf->unexpected = FALSE; |
| result = |
| gst_pad_start_task (pad, (GstTaskFunction) gst_download_buffer_loop, |
| pad, NULL); |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| } else { |
| /* unblock loop function */ |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| GST_DEBUG_OBJECT (dlbuf, "deactivating push mode"); |
| dlbuf->srcresult = GST_FLOW_FLUSHING; |
| dlbuf->sinkresult = GST_FLOW_FLUSHING; |
| /* the item add signal will unblock */ |
| GST_DOWNLOAD_BUFFER_SIGNAL_ADD (dlbuf, -1); |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| |
| /* step 2, make sure streaming finishes */ |
| result = gst_pad_stop_task (pad); |
| } |
| |
| return result; |
| } |
| |
| /* pull mode, downstream will call our getrange function */ |
| static gboolean |
| gst_download_buffer_src_activate_pull (GstPad * pad, GstObject * parent, |
| gboolean active) |
| { |
| gboolean result; |
| GstDownloadBuffer *dlbuf; |
| |
| dlbuf = GST_DOWNLOAD_BUFFER (parent); |
| |
| if (active) { |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| /* open the temp file now */ |
| result = gst_download_buffer_open_temp_location_file (dlbuf); |
| GST_DEBUG_OBJECT (dlbuf, "activating pull mode"); |
| dlbuf->srcresult = GST_FLOW_OK; |
| dlbuf->sinkresult = GST_FLOW_OK; |
| dlbuf->unexpected = FALSE; |
| dlbuf->upstream_size = 0; |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| } else { |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| GST_DEBUG_OBJECT (dlbuf, "deactivating pull mode"); |
| dlbuf->srcresult = GST_FLOW_FLUSHING; |
| dlbuf->sinkresult = GST_FLOW_FLUSHING; |
| /* this will unlock getrange */ |
| GST_DOWNLOAD_BUFFER_SIGNAL_ADD (dlbuf, -1); |
| result = TRUE; |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| } |
| |
| return result; |
| } |
| |
| static gboolean |
| gst_download_buffer_src_activate_mode (GstPad * pad, GstObject * parent, |
| GstPadMode mode, gboolean active) |
| { |
| gboolean res; |
| |
| switch (mode) { |
| case GST_PAD_MODE_PULL: |
| res = gst_download_buffer_src_activate_pull (pad, parent, active); |
| break; |
| case GST_PAD_MODE_PUSH: |
| res = gst_download_buffer_src_activate_push (pad, parent, active); |
| break; |
| default: |
| GST_LOG_OBJECT (pad, "unknown activation mode %d", mode); |
| res = FALSE; |
| break; |
| } |
| return res; |
| } |
| |
| static GstStateChangeReturn |
| gst_download_buffer_change_state (GstElement * element, |
| GstStateChange transition) |
| { |
| GstDownloadBuffer *dlbuf; |
| GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; |
| |
| dlbuf = GST_DOWNLOAD_BUFFER (element); |
| |
| switch (transition) { |
| case GST_STATE_CHANGE_NULL_TO_READY: |
| break; |
| case GST_STATE_CHANGE_READY_TO_PAUSED: |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| if (!gst_download_buffer_open_temp_location_file (dlbuf)) |
| ret = GST_STATE_CHANGE_FAILURE; |
| gst_event_replace (&dlbuf->stream_start_event, NULL); |
| gst_event_replace (&dlbuf->segment_event, NULL); |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| break; |
| case GST_STATE_CHANGE_PAUSED_TO_PLAYING: |
| break; |
| default: |
| break; |
| } |
| |
| if (ret == GST_STATE_CHANGE_FAILURE) |
| return ret; |
| |
| ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); |
| |
| if (ret == GST_STATE_CHANGE_FAILURE) |
| return ret; |
| |
| switch (transition) { |
| case GST_STATE_CHANGE_PLAYING_TO_PAUSED: |
| break; |
| case GST_STATE_CHANGE_PAUSED_TO_READY: |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| gst_download_buffer_close_temp_location_file (dlbuf); |
| gst_event_replace (&dlbuf->stream_start_event, NULL); |
| gst_event_replace (&dlbuf->segment_event, NULL); |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| break; |
| case GST_STATE_CHANGE_READY_TO_NULL: |
| break; |
| default: |
| break; |
| } |
| |
| return ret; |
| } |
| |
| #define CAPACITY_CHANGE(elem) \ |
| update_buffering (elem); |
| |
| static void |
| gst_download_buffer_set_temp_template (GstDownloadBuffer * dlbuf, |
| const gchar * template) |
| { |
| GstState state; |
| |
| /* the element must be stopped in order to do this */ |
| GST_OBJECT_LOCK (dlbuf); |
| state = GST_STATE (dlbuf); |
| if (state != GST_STATE_READY && state != GST_STATE_NULL) |
| goto wrong_state; |
| GST_OBJECT_UNLOCK (dlbuf); |
| |
| /* set new location */ |
| g_free (dlbuf->temp_template); |
| dlbuf->temp_template = g_strdup (template); |
| |
| return; |
| |
| /* ERROR */ |
| wrong_state: |
| { |
| GST_WARNING_OBJECT (dlbuf, "setting temp-template property in wrong state"); |
| GST_OBJECT_UNLOCK (dlbuf); |
| } |
| } |
| |
| static void |
| gst_download_buffer_set_property (GObject * object, |
| guint prop_id, const GValue * value, GParamSpec * pspec) |
| { |
| GstDownloadBuffer *dlbuf = GST_DOWNLOAD_BUFFER (object); |
| GstMessage *msg = NULL; |
| |
| /* someone could change levels here, and since this |
| * affects the get/put funcs, we need to lock for safety. */ |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| |
| switch (prop_id) { |
| case PROP_MAX_SIZE_BYTES: |
| dlbuf->max_level.bytes = g_value_get_uint (value); |
| msg = CAPACITY_CHANGE (dlbuf); |
| break; |
| case PROP_MAX_SIZE_TIME: |
| dlbuf->max_level.time = g_value_get_uint64 (value); |
| msg = CAPACITY_CHANGE (dlbuf); |
| break; |
| case PROP_LOW_PERCENT: |
| dlbuf->low_percent = g_value_get_int (value); |
| break; |
| case PROP_HIGH_PERCENT: |
| dlbuf->high_percent = g_value_get_int (value); |
| break; |
| case PROP_TEMP_TEMPLATE: |
| gst_download_buffer_set_temp_template (dlbuf, g_value_get_string (value)); |
| break; |
| case PROP_TEMP_REMOVE: |
| dlbuf->temp_remove = g_value_get_boolean (value); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| |
| if (msg != NULL) |
| gst_element_post_message (GST_ELEMENT_CAST (dlbuf), msg); |
| |
| } |
| |
| static void |
| gst_download_buffer_get_property (GObject * object, |
| guint prop_id, GValue * value, GParamSpec * pspec) |
| { |
| GstDownloadBuffer *dlbuf = GST_DOWNLOAD_BUFFER (object); |
| |
| GST_DOWNLOAD_BUFFER_MUTEX_LOCK (dlbuf); |
| |
| switch (prop_id) { |
| case PROP_MAX_SIZE_BYTES: |
| g_value_set_uint (value, dlbuf->max_level.bytes); |
| break; |
| case PROP_MAX_SIZE_TIME: |
| g_value_set_uint64 (value, dlbuf->max_level.time); |
| break; |
| case PROP_LOW_PERCENT: |
| g_value_set_int (value, dlbuf->low_percent); |
| break; |
| case PROP_HIGH_PERCENT: |
| g_value_set_int (value, dlbuf->high_percent); |
| break; |
| case PROP_TEMP_TEMPLATE: |
| g_value_set_string (value, dlbuf->temp_template); |
| break; |
| case PROP_TEMP_LOCATION: |
| g_value_set_string (value, dlbuf->temp_location); |
| break; |
| case PROP_TEMP_REMOVE: |
| g_value_set_boolean (value, dlbuf->temp_remove); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| |
| GST_DOWNLOAD_BUFFER_MUTEX_UNLOCK (dlbuf); |
| } |