* #GstAdapter.
* </para></listitem>
* <listitem><para>
- * A buffer of min_frame_size bytes is passed to subclass with
+ * A buffer of (at least) min_frame_size bytes is passed to subclass with
* @check_valid_frame. Subclass checks the contents and returns TRUE
* if the buffer contains a valid frame. It also needs to set the
* @framesize according to the detected frame size. If buffer didn't
* <listitem><para>
* After valid frame is found, it will be passed again to subclass with
* @parse_frame call. Now subclass is responsible for parsing the
- * frame contents and setting the buffer timestamp, duration and caps.
+ * frame contents and setting the caps, buffer timestamp and duration
+ * (although the latter can also be done by GstBaseParse if it is
+ * appropriately configured, see below).
* </para></listitem>
* <listitem><para>
* Finally the buffer can be pushed downstream and parsing loop starts
- * over again.
+ * over again. Just prior to actually pushing the buffer in question,
+ * it is passed to @pre_push_buffer which gives subclass yet one
+ * last chance to examine buffer metadata, or to send some custom (tag)
+ * events, or to perform custom (segment) filtering.
* </para></listitem>
* <listitem><para>
* During the parsing process GstBaseParseClass will handle both srcpad and
* GST_FORMAT_TIME to GST_FORMAT_DEFAULT must return the
* frame number that can be found from the given byte position.
*
- * GstBaseParse uses subclasses conversion methods also for seeking. If
- * subclass doesn't provide @convert function, seeking will get disabled.
+ * GstBaseParse uses subclasses conversion methods also for seeking (or otherwise
+ * uses its own default one, see also below).
*
* Subclass @start and @stop functions will be called to inform the beginning
* and end of data processing.
* Update the duration information with @gst_base_parse_set_duration
* </para></listitem>
* <listitem><para>
- * Alternatively, parsing (or specs) might yield a frames per seconds rate
- * which can be provided to GstBaseParse to enable it to cater for
+ * Optionally passthrough using @gst_base_parse_set_passthrough
+ * </para></listitem>
+ * <listitem><para>
+ * Configure various baseparse parameters using @gst_base_parse_set_seek and
+ * @gst_base_parse_set_frame_props.
+ * </para></listitem>
+ * <listitem><para>
+ * In particular, if subclass is unable to determine a duration, but
+ * parsing (or specs) yields a frames per seconds rate, then this can be
+ * provided to GstBaseParse to enable it to cater for
* buffer time metadata (which will be taken from upstream as much as possible).
- * Internally keeping track of frames and respective
- * sizes that have been pushed provides GstBaseParse with a bytes per frame
- * rate. A default @convert (used if not overriden) will then use these
+ * Internally keeping track of frame durations and respective
+ * sizes that have been pushed provides GstBaseParse with an estimated bitrate.
+ * A default @convert (used if not overriden) will then use these
* rates to perform obvious conversions. These rates are also used to update
* (estimated) duration at regular frame intervals.
- * If no (fixed) frames per second rate applies, default conversion will be
- * based on (estimated) bytes per second (but no default buffer metadata
- * can be provided in this case).
* </para></listitem>
* </itemizedlist>
*
*/
/* TODO:
- * - Better segment handling:
- * - NEWSEGMENT for gaps
- * - Not NEWSEGMENT starting at 0 but at first frame timestamp
- * - GstIndex support
- * - Seek table generation and subclass seek entry injection
- * - Accurate seeking
* - In push mode provide a queue of adapter-"queued" buffers for upstream
* buffer metadata
* - Queue buffers/events until caps are set
- * - Let subclass decide if frames outside the segment should be dropped
- * - Send queries upstream
*/
#ifdef HAVE_CONFIG_H
#include "gstbaseparse.h"
#define MIN_FRAMES_TO_POST_BITRATE 10
+#define TARGET_DIFFERENCE (20 * GST_SECOND)
GST_DEBUG_CATEGORY_STATIC (gst_base_parse_debug);
#define GST_CAT_DEFAULT gst_base_parse_debug
guint fps_num, fps_den;
guint update_interval;
guint bitrate;
+ guint lead_in, lead_out;
+ GstClockTime lead_in_ts, lead_out_ts;
GstBaseParseSeekable seekable;
gboolean discont;
GstClockTime next_ts;
GstClockTime prev_ts;
GstClockTime frame_duration;
+ gboolean seen_keyframe;
+ gboolean is_video;
guint64 framecount;
guint64 bytecount;
guint64 data_bytecount;
guint64 acc_duration;
+ GstClockTime first_frame_ts;
+ gint64 first_frame_offset;
gboolean post_min_bitrate;
gboolean post_avg_bitrate;
gboolean own_index;
/* seek table entries only maintained if upstream is BYTE seekable */
gboolean upstream_seekable;
+ gboolean upstream_has_duration;
+ gint64 upstream_size;
/* minimum distance between two index entries */
GstClockTimeDiff idx_interval;
/* ts and offset of last entry added */
GstClockTime index_last_ts;
guint64 index_last_offset;
+ gboolean index_last_valid;
+
+ /* timestamps currently produced are accurate, e.g. started from 0 onwards */
+ gboolean exact_position;
+ /* seek events are temporarily kept to match them with newsegments */
+ GSList *pending_seeks;
+
+ /* reverse playback */
+ GSList *buffers_pending;
+ GSList *buffers_queued;
+ GstClockTime last_ts;
+ gint64 last_offset;
};
+typedef struct _GstBaseParseSeek
+{
+ GstSegment segment;
+ gboolean accurate;
+ gint64 offset;
+ GstClockTime start_ts;
+} GstBaseParseSeek;
+
static GstElementClass *parent_class = NULL;
static void gst_base_parse_class_init (GstBaseParseClass * klass);
static void gst_base_parse_post_bitrates (GstBaseParse * parse,
gboolean post_min, gboolean post_avg, gboolean post_max);
+static gint64 gst_base_parse_find_offset (GstBaseParse * parse,
+ GstClockTime time, gboolean before, GstClockTime * _ts);
+static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
+ GstClockTime * _time, gint64 * _offset);
+
+static GstFlowReturn gst_base_parse_process_fragment (GstBaseParse * parse,
+ gboolean push_only);
+
+static void
+gst_base_parse_clear_queues (GstBaseParse * parse)
+{
+ g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
+ g_slist_free (parse->priv->buffers_queued);
+ parse->priv->buffers_queued = NULL;
+ g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
+ NULL);
+ g_slist_free (parse->priv->buffers_pending);
+ parse->priv->buffers_pending = NULL;
+}
+
static void
gst_base_parse_finalize (GObject * object)
{
GstBaseParse *parse = GST_BASE_PARSE (object);
GstEvent **p_ev;
- g_mutex_free (parse->parse_lock);
g_object_unref (parse->adapter);
if (parse->pending_segment) {
parse->priv->index = NULL;
}
+ gst_base_parse_clear_queues (parse);
+
G_OBJECT_CLASS (parent_class)->finalize (object);
}
gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
GST_DEBUG_OBJECT (parse, "src created");
- parse->parse_lock = g_mutex_new ();
parse->adapter = gst_adapter_new ();
parse->priv->pad_mode = GST_ACTIVATE_NONE;
parse->priv->update_interval = 50;
parse->priv->fps_num = parse->priv->fps_den = 0;
parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
+ parse->priv->lead_in = parse->priv->lead_out = 0;
+ parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
parse->priv->seekable = GST_BASE_PARSE_SEEK_DEFAULT;
parse->priv->bitrate = 0;
parse->priv->framecount = 0;
parse->priv->bytecount = 0;
parse->priv->acc_duration = 0;
+ parse->priv->first_frame_ts = GST_CLOCK_TIME_NONE;
+ parse->priv->first_frame_offset = -1;
parse->priv->estimated_duration = -1;
parse->priv->next_ts = 0;
parse->priv->passthrough = FALSE;
parse->priv->index_last_ts = 0;
parse->priv->index_last_offset = 0;
+ parse->priv->index_last_valid = TRUE;
parse->priv->upstream_seekable = FALSE;
+ parse->priv->upstream_size = 0;
+ parse->priv->upstream_has_duration = FALSE;
parse->priv->idx_interval = 0;
+ parse->priv->exact_position = TRUE;
+ parse->priv->seen_keyframe = FALSE;
- if (parse->pending_segment)
+ parse->priv->last_ts = GST_CLOCK_TIME_NONE;
+ parse->priv->last_offset = 0;
+
+ if (parse->pending_segment) {
gst_event_unref (parse->pending_segment);
+ parse->pending_segment = NULL;
+ }
g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
NULL);
gst_buffer_unref (parse->priv->cache);
parse->priv->cache = NULL;
}
+
+ g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
+ g_slist_free (parse->priv->pending_seeks);
+ parse->priv->pending_seeks = NULL;
+
GST_OBJECT_UNLOCK (parse);
}
gboolean handled = FALSE;
gboolean ret = TRUE;
-
parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
bclass = GST_BASE_PARSE_GET_CLASS (parse);
- GST_DEBUG_OBJECT (parse, "handling event %d", GST_EVENT_TYPE (event));
+ GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
+ GST_EVENT_TYPE_NAME (event));
/* Cache all events except EOS, NEWSEGMENT and FLUSH_STOP if we have a
* pending segment */
*
* Element-level event handler function.
*
- * Returns: TRUE if the event was handled and not need forwarding.
+ * The event will be unreffed only if it has been handled and this
+ * function returns %TRUE
+ *
+ * Returns: %TRUE if the event was handled and not need forwarding.
*/
static gboolean
gst_base_parse_sink_eventfunc (GstBaseParse * parse, GstEvent * event)
{
gdouble rate, applied_rate;
GstFormat format;
- gint64 start, stop, pos, offset = 0;
+ gint64 start, stop, pos, next_ts, offset = 0;
gboolean update;
gst_event_parse_new_segment_full (event, &update, &rate, &applied_rate,
&format, &start, &stop, &pos);
+ GST_DEBUG_OBJECT (parse, "newseg rate %g, applied rate %g, "
+ "format %d, start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
+ ", pos = %" GST_TIME_FORMAT, rate, applied_rate, format,
+ GST_TIME_ARGS (start), GST_TIME_ARGS (stop), GST_TIME_ARGS (pos));
if (format == GST_FORMAT_BYTES) {
- GstClockTime seg_start, seg_stop, seg_pos;
+ GstClockTime seg_start, seg_stop;
+ GstBaseParseSeek *seek = NULL;
+ GSList *node;
/* stop time is allowed to be open-ended, but not start & pos */
seg_stop = GST_CLOCK_TIME_NONE;
+ seg_start = 0;
offset = pos;
- if (gst_base_parse_convert (parse, GST_FORMAT_BYTES, start,
- GST_FORMAT_TIME, (gint64 *) & seg_start) &&
- gst_base_parse_convert (parse, GST_FORMAT_BYTES, pos,
- GST_FORMAT_TIME, (gint64 *) & seg_pos)) {
- gst_event_unref (event);
- event = gst_event_new_new_segment_full (update, rate, applied_rate,
- GST_FORMAT_TIME, seg_start, seg_stop, seg_pos);
- format = GST_FORMAT_TIME;
- GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. "
- "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
- ", pos = %" GST_TIME_FORMAT, GST_TIME_ARGS (seg_start),
- GST_TIME_ARGS (seg_stop), GST_TIME_ARGS (seg_pos));
+ GST_OBJECT_LOCK (parse);
+ for (node = parse->priv->pending_seeks; node; node = node->next) {
+ GstBaseParseSeek *tmp = node->data;
+
+ if (tmp->offset == pos) {
+ seek = tmp;
+ break;
+ }
}
- }
+ parse->priv->pending_seeks =
+ g_slist_remove (parse->priv->pending_seeks, seek);
+ GST_OBJECT_UNLOCK (parse);
- if (format != GST_FORMAT_TIME) {
+ if (seek) {
+ GST_DEBUG_OBJECT (parse,
+ "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
+ seek->accurate ? " accurate" : "", &seek->segment);
+ seg_start = seek->segment.start;
+ seg_stop = seek->segment.stop;
+ next_ts = seek->start_ts;
+ parse->priv->exact_position = seek->accurate;
+ g_free (seek);
+ } else {
+ /* best attempt convert */
+ /* as these are only estimates, stop is kept open-ended to avoid
+ * premature cutting */
+ gst_base_parse_convert (parse, GST_FORMAT_BYTES, start,
+ GST_FORMAT_TIME, (gint64 *) & seg_start);
+ parse->priv->exact_position = (start == 0);
+ next_ts = seg_start;
+ }
+
+ gst_event_unref (event);
+ event = gst_event_new_new_segment_full (update, rate, applied_rate,
+ GST_FORMAT_TIME, seg_start, seg_stop, seg_start);
+ format = GST_FORMAT_TIME;
+ start = seg_start;
+ stop = seg_stop;
+ GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. "
+ "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (seg_start), GST_TIME_ARGS (seg_stop));
+ } else if (format != GST_FORMAT_TIME) {
/* Unknown incoming segment format. Output a default open-ended
* TIME segment */
gst_event_unref (event);
event = gst_event_new_new_segment_full (update, rate, applied_rate,
GST_FORMAT_TIME, 0, GST_CLOCK_TIME_NONE, 0);
+ format = GST_FORMAT_TIME;
+ next_ts = start = 0;
+ stop = GST_CLOCK_TIME_NONE;
} else {
/* not considered BYTE seekable if it is talking to us in TIME,
* whatever else it might claim */
parse->priv->upstream_seekable = FALSE;
+ next_ts = start;
}
- gst_event_parse_new_segment_full (event, &update, &rate, &applied_rate,
- &format, &start, &stop, &pos);
-
gst_segment_set_newsegment_full (&parse->segment, update, rate,
- applied_rate, format, start, stop, pos);
-
- GST_DEBUG_OBJECT (parse, "Created newseg rate %g, applied rate %g, "
- "format %d, start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
- ", pos = %" GST_TIME_FORMAT, rate, applied_rate, format,
- GST_TIME_ARGS (start), GST_TIME_ARGS (stop), GST_TIME_ARGS (pos));
+ applied_rate, format, start, stop, start);
/* save the segment for later, right before we push a new buffer so that
* the caps are fixed and the next linked element can receive
/* but finish the current segment */
GST_DEBUG_OBJECT (parse, "draining current segment");
- gst_base_parse_drain (parse);
+ if (parse->segment.rate > 0.0)
+ gst_base_parse_drain (parse);
+ else
+ gst_base_parse_process_fragment (parse, FALSE);
gst_adapter_clear (parse->adapter);
parse->priv->offset = offset;
parse->priv->sync_offset = offset;
- parse->priv->next_ts = start;
+ parse->priv->next_ts = next_ts;
+ parse->priv->last_ts = GST_CLOCK_TIME_NONE;
parse->priv->discont = TRUE;
+ parse->priv->seen_keyframe = FALSE;
break;
}
case GST_EVENT_FLUSH_START:
parse->priv->flushing = TRUE;
- handled = gst_pad_push_event (parse->srcpad, event);
+ handled = gst_pad_push_event (parse->srcpad, gst_event_ref (event));
+ if (handled)
+ gst_event_unref (event);
/* Wait for _chain() to exit by taking the srcpad STREAM_LOCK */
GST_PAD_STREAM_LOCK (parse->srcpad);
GST_PAD_STREAM_UNLOCK (parse->srcpad);
case GST_EVENT_FLUSH_STOP:
gst_adapter_clear (parse->adapter);
+ gst_base_parse_clear_queues (parse);
parse->priv->flushing = FALSE;
parse->priv->discont = TRUE;
+ parse->priv->last_ts = GST_CLOCK_TIME_NONE;
break;
case GST_EVENT_EOS:
- gst_base_parse_drain (parse);
+ if (parse->segment.rate > 0.0)
+ gst_base_parse_drain (parse);
+ else
+ gst_base_parse_process_fragment (parse, FALSE);
/* If we STILL have zero frames processed, fire an error */
if (parse->priv->framecount == 0) {
gst_base_parse_src_eventfunc (GstBaseParse * parse, GstEvent * event)
{
gboolean handled = FALSE;
- GstBaseParseClass *bclass;
-
- bclass = GST_BASE_PARSE_GET_CLASS (parse);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
if (!parse->priv->framecount)
return FALSE;
- /* either frame info (having num means den also ok) or use average bitrate */
- if (parse->priv->fps_num) {
- duration = parse->priv->framecount * parse->priv->fps_den * 1000;
- bytes = parse->priv->bytecount * parse->priv->fps_num;
- } else {
- duration = parse->priv->acc_duration / GST_MSECOND;
- bytes = parse->priv->bytecount;
- }
+ duration = parse->priv->acc_duration / GST_MSECOND;
+ bytes = parse->priv->bytecount;
if (G_UNLIKELY (!duration || !bytes))
return FALSE;
data_len = GST_BUFFER_SIZE (buffer) - overhead;
parse->priv->data_bytecount += data_len;
- if (parse->priv->fps_num) {
- /* Calculate duration of a frame from frame properties */
- frame_dur = (GST_SECOND * parse->priv->fps_den) / parse->priv->fps_num;
- parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
- (parse->priv->framecount * frame_dur);
-
- } else if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
+ /* duration should be valid by now,
+ * either set by subclass or maybe based on fps settings */
+ if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
/* Calculate duration of a frame from buffer properties */
frame_dur = GST_BUFFER_DURATION (buffer);
parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
/* override if subclass provided bitrate, e.g. metadata based */
if (parse->priv->bitrate) {
parse->priv->avg_bitrate = parse->priv->bitrate;
+ /* spread this (confirmed) info ASAP */
+ if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
+ gst_base_parse_post_bitrates (parse, FALSE, TRUE, FALSE);
}
frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
parse->priv->avg_bitrate);
- if (frame_bitrate < parse->priv->min_bitrate) {
- parse->priv->min_bitrate = frame_bitrate;
- update_min = TRUE;
- }
-
- if (frame_bitrate > parse->priv->max_bitrate) {
- parse->priv->max_bitrate = frame_bitrate;
- update_max = TRUE;
- }
+ if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
+ goto exit;
+ } else if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE) {
+ /* always post all at threshold time */
+ update_min = update_max = update_avg = TRUE;
+ } else {
+ if (frame_bitrate < parse->priv->min_bitrate) {
+ parse->priv->min_bitrate = frame_bitrate;
+ update_min = TRUE;
+ }
- old_avg_bitrate = parse->priv->posted_avg_bitrate;
- if ((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold ||
- (gint) (parse->priv->avg_bitrate - old_avg_bitrate) > update_threshold)
- update_avg = TRUE;
+ if (frame_bitrate > parse->priv->max_bitrate) {
+ parse->priv->max_bitrate = frame_bitrate;
+ update_max = TRUE;
+ }
- /* always post all at threshold time */
- if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE)
- gst_base_parse_post_bitrates (parse, TRUE, TRUE, TRUE);
+ old_avg_bitrate = parse->priv->posted_avg_bitrate;
+ if ((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
+ || (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
+ update_threshold)
+ update_avg = TRUE;
+ }
- if (parse->priv->framecount > MIN_FRAMES_TO_POST_BITRATE &&
- (update_min || update_avg || update_max))
+ if ((update_min || update_avg || update_max))
gst_base_parse_post_bitrates (parse, update_min, update_avg, update_max);
/* If average bitrate changes that much and no valid (time) duration provided,
GST_CLOCK_TIME_IS_VALID (parse->priv->duration)))
gst_element_post_message (GST_ELEMENT (parse),
gst_message_new_duration (GST_OBJECT (parse), GST_FORMAT_TIME, -1));
+
+exit:
+ return;
}
/**
goto exit;
}
+ /* FIXME need better helper data structure that handles these issues
+ * related to ongoing collecting of index entries */
if (parse->priv->index_last_offset >= offset) {
GST_DEBUG_OBJECT (parse, "already have entries up to offset "
"0x%08" G_GINT64_MODIFIER "x", parse->priv->index_last_offset);
GST_TIME_ARGS (parse->priv->index_last_ts));
goto exit;
}
+
+ /* if last is not really the last one */
+ if (!parse->priv->index_last_valid) {
+ GstClockTime prev_ts;
+
+ gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
+ if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
+ GST_DEBUG_OBJECT (parse,
+ "entry too close to existing entry %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (prev_ts));
+ parse->priv->index_last_offset = offset;
+ parse->priv->index_last_ts = ts;
+ goto exit;
+ }
+ }
}
associations[0].format = GST_FORMAT_TIME;
2, (const GstIndexAssociation *) &associations);
GST_OBJECT_UNLOCK (parse);
- parse->priv->index_last_offset = offset;
- parse->priv->index_last_ts = ts;
+ if (key) {
+ parse->priv->index_last_offset = offset;
+ parse->priv->index_last_ts = ts;
+ }
ret = TRUE;
GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
G_GUINT64_FORMAT ")", seekable, start, stop);
parse->priv->upstream_seekable = seekable;
+ parse->priv->upstream_size = seekable ? stop : 0;
GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
parse->priv->idx_interval = idx_interval * GST_MSECOND;
}
+/* some misc checks on upstream */
+static void
+gst_base_parse_check_upstream (GstBaseParse * parse)
+{
+ GstFormat fmt = GST_FORMAT_TIME;
+ gint64 stop;
+
+ if (gst_pad_query_peer_duration (parse->sinkpad, &fmt, &stop))
+ if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
+ /* upstream has one, accept it also, and no further updates */
+ gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
+ parse->priv->upstream_has_duration = TRUE;
+ }
+
+ GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
+ parse->priv->upstream_has_duration);
+}
+
+/* checks src caps to determine if dealing with audio or video */
+/* TODO maybe forego automagic stuff and let subclass configure it ? */
+static void
+gst_base_parse_check_media (GstBaseParse * parse)
+{
+ GstCaps *caps;
+ GstStructure *s;
+
+ caps = GST_PAD_CAPS (parse->srcpad);
+ if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
+ parse->priv->is_video =
+ g_str_has_prefix (gst_structure_get_name (s), "video");
+ } else {
+ /* historical default */
+ parse->priv->is_video = FALSE;
+ }
+
+ GST_DEBUG_OBJECT (parse, "media is video == %d", parse->priv->is_video);
+}
+
/**
* gst_base_parse_handle_and_push_buffer:
* @parse: #GstBaseParse.
GstBaseParseClass * klass, GstBuffer * buffer)
{
GstFlowReturn ret;
+ gint64 offset;
if (parse->priv->discont) {
GST_DEBUG_OBJECT (parse, "marking DISCONT");
parse->priv->discont = FALSE;
}
+ /* some one-time start-up */
+ if (G_UNLIKELY (!parse->priv->framecount)) {
+ gst_base_parse_check_seekability (parse);
+ gst_base_parse_check_upstream (parse);
+ }
+
GST_LOG_OBJECT (parse,
"parsing frame at offset %" G_GUINT64_FORMAT
" (%#" G_GINT64_MODIFIER "x) of size %d",
GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
GST_BUFFER_SIZE (buffer));
+ /* store offset as it might get overwritten */
+ offset = GST_BUFFER_OFFSET (buffer);
ret = klass->parse_frame (parse, buffer);
+ /* check initial frame to determine if subclass/format can provide ts.
+ * If so, that allows and enables extra seek and duration determining options */
+ if (G_UNLIKELY (parse->priv->first_frame_offset < 0 && ret == GST_FLOW_OK)) {
+ if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer)) {
+ parse->priv->first_frame_offset = offset;
+ parse->priv->first_frame_ts = GST_BUFFER_TIMESTAMP (buffer);
+ GST_DEBUG_OBJECT (parse, "subclass provided ts %" GST_TIME_FORMAT
+ " for first frame at offset %" G_GINT64_FORMAT,
+ GST_TIME_ARGS (parse->priv->first_frame_ts),
+ parse->priv->first_frame_offset);
+ if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
+ gint64 off;
+ GstClockTime last_ts = G_MAXINT64;
+
+ GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
+ gst_base_parse_locate_time (parse, &last_ts, &off);
+ if (GST_CLOCK_TIME_IS_VALID (last_ts))
+ gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
+ }
+ } else {
+ /* disable further checks */
+ parse->priv->first_frame_offset = 0;
+ }
+ }
+
/* re-use default handler to add missing metadata as-much-as-possible */
gst_base_parse_parse_frame (parse, buffer);
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
parse->priv->next_ts = GST_CLOCK_TIME_NONE;
}
+ if (parse->priv->upstream_seekable && parse->priv->exact_position &&
+ GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
+ gst_base_parse_add_index_entry (parse, offset,
+ GST_BUFFER_TIMESTAMP (buffer),
+ !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
+
/* First buffers are dropped, this means that the subclass needs more
* frames to decide on the format and queues them internally */
/* convert internal flow to OK and mark discont for the next buffer. */
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
- /* some one-time start-up */
- if (G_UNLIKELY (!parse->priv->framecount)) {
- gst_base_parse_check_seekability (parse);
- }
-
/* update stats */
parse->priv->bytecount += GST_BUFFER_SIZE (buffer);
if (!GST_BUFFER_FLAG_IS_SET (buffer, GST_BASE_PARSE_BUFFER_FLAG_NO_FRAME)) {
(parse->priv->framecount % parse->priv->update_interval) == 0)
gst_base_parse_update_duration (parse);
- gst_base_parse_update_bitrates (parse, buffer);
-
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
last_start = last_stop = GST_BUFFER_TIMESTAMP (buffer);
if (last_start != GST_CLOCK_TIME_NONE
gst_buffer_set_caps (buffer, GST_PAD_CAPS (parse->srcpad));
/* segment adjustment magic; only if we are running the whole show */
- if (!parse->priv->passthrough &&
+ if (!parse->priv->passthrough && parse->segment.rate > 0.0 &&
(parse->priv->pad_mode == GST_ACTIVATE_PULL ||
parse->priv->upstream_seekable)) {
/* segment times are typically estimates,
* actual frame data might lead subclass to different timestamps,
* so override segment start from what is supplied there */
- if (G_UNLIKELY (parse->pending_segment &&
+ if (G_UNLIKELY (parse->pending_segment && !parse->priv->exact_position &&
GST_CLOCK_TIME_IS_VALID (last_start))) {
gst_event_unref (parse->pending_segment);
parse->segment.start =
}
/* and should then also be linked downstream, so safe to send some events */
- if (parse->priv->pad_mode == GST_ACTIVATE_PULL) {
- if (G_UNLIKELY (parse->close_segment)) {
- GST_DEBUG_OBJECT (parse, "loop sending close segment");
- gst_pad_push_event (parse->srcpad, parse->close_segment);
- parse->close_segment = NULL;
- }
+ if (G_UNLIKELY (parse->close_segment)) {
+ /* only set up by loop */
+ GST_DEBUG_OBJECT (parse, "loop sending close segment");
+ gst_pad_push_event (parse->srcpad, parse->close_segment);
+ parse->close_segment = NULL;
+ }
+ if (G_UNLIKELY (parse->pending_segment)) {
+ GST_DEBUG_OBJECT (parse, "%s push pending segment",
+ parse->priv->pad_mode == GST_ACTIVATE_PULL ? "loop" : "chain");
+ gst_pad_push_event (parse->srcpad, parse->pending_segment);
+ parse->pending_segment = NULL;
- if (G_UNLIKELY (parse->pending_segment)) {
- GST_DEBUG_OBJECT (parse, "loop push pending segment");
- gst_pad_push_event (parse->srcpad, parse->pending_segment);
- parse->pending_segment = NULL;
- }
- } else {
- if (G_UNLIKELY (parse->pending_segment)) {
- GST_DEBUG_OBJECT (parse, "chain pushing a pending segment");
- gst_pad_push_event (parse->srcpad, parse->pending_segment);
- parse->pending_segment = NULL;
- }
+ /* have caps; check identity */
+ gst_base_parse_check_media (parse);
}
+ /* update bitrates and optionally post corresponding tags
+ * (following newsegment) */
+ gst_base_parse_update_bitrates (parse, buffer);
+
if (G_UNLIKELY (parse->priv->pending_events)) {
GList *l;
parse->priv->pending_events = NULL;
}
- /* TODO: Add to seek table */
-
if (klass->pre_push_buffer)
ret = klass->pre_push_buffer (parse, buffer);
else
ret = GST_BASE_PARSE_FLOW_CLIP;
+ parse->priv->seen_keyframe |= parse->priv->is_video &&
+ !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
+
if (ret == GST_BASE_PARSE_FLOW_CLIP) {
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
- GST_BUFFER_TIMESTAMP (buffer) > parse->segment.stop) {
+ GST_BUFFER_TIMESTAMP (buffer) >
+ parse->segment.stop + parse->priv->lead_out_ts) {
GST_LOG_OBJECT (parse, "Dropped frame, after segment");
ret = GST_FLOW_UNEXPECTED;
} else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
GST_BUFFER_DURATION_IS_VALID (buffer) &&
GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
- GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer)
- < parse->segment.start) {
- GST_LOG_OBJECT (parse, "Dropped frame, before segment");
- ret = GST_BASE_PARSE_FLOW_DROPPED;
+ GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
+ parse->priv->lead_in_ts < parse->segment.start) {
+ if (parse->priv->seen_keyframe) {
+ GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
+ ret = GST_FLOW_OK;
+ } else {
+ GST_LOG_OBJECT (parse, "Dropped frame, before segment");
+ ret = GST_BASE_PARSE_FLOW_DROPPED;
+ }
} else {
ret = GST_FLOW_OK;
}
gst_buffer_unref (buffer);
ret = GST_FLOW_OK;
} else if (ret == GST_FLOW_OK) {
- ret = gst_pad_push (parse->srcpad, buffer);
- GST_LOG_OBJECT (parse, "frame (%d bytes) pushed: %s",
- GST_BUFFER_SIZE (buffer), gst_flow_get_name (ret));
+ if (parse->segment.rate > 0.0) {
+ ret = gst_pad_push (parse->srcpad, buffer);
+ GST_LOG_OBJECT (parse, "frame (%d bytes) pushed: %s",
+ GST_BUFFER_SIZE (buffer), gst_flow_get_name (ret));
+ } else {
+ GST_LOG_OBJECT (parse, "frame (%d bytes) queued for now",
+ GST_BUFFER_SIZE (buffer));
+ parse->priv->buffers_queued =
+ g_slist_prepend (parse->priv->buffers_queued, buffer);
+ ret = GST_FLOW_OK;
+ }
} else {
gst_buffer_unref (buffer);
GST_LOG_OBJECT (parse, "frame (%d bytes) not pushed: %s",
parse->priv->drain = FALSE;
}
+/**
+ * gst_base_parse_process_fragment:
+ * @parse: #GstBaseParse.
+ *
+ * Processes a reverse playback (forward) fragment:
+ * - append head of last fragment that was skipped to current fragment data
+ * - drain the resulting current fragment data (i.e. repeated chain)
+ * - add time/duration (if needed) to frames queued by chain
+ * - push queued data
+ */
+static GstFlowReturn
+gst_base_parse_process_fragment (GstBaseParse * parse, gboolean push_only)
+{
+ GstBuffer *buf;
+ GstFlowReturn ret = GST_FLOW_OK;
+ GSList *send = NULL;
+
+ if (push_only)
+ goto push;
+
+ /* restore order */
+ parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
+ while (parse->priv->buffers_pending) {
+ buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
+ GST_LOG_OBJECT (parse, "adding pending buffer (size %d)",
+ GST_BUFFER_SIZE (buf));
+ gst_adapter_push (parse->adapter, buf);
+ parse->priv->buffers_pending =
+ g_slist_delete_link (parse->priv->buffers_pending,
+ parse->priv->buffers_pending);
+ }
+
+ /* invalidate so no fall-back timestamping is performed;
+ * ok if taken from subclass or upstream */
+ parse->priv->next_ts = GST_CLOCK_TIME_NONE;
+ /* prevent it hanging around stop all the time */
+ parse->segment.last_stop = GST_CLOCK_TIME_NONE;
+ /* mark next run */
+ parse->priv->discont = TRUE;
+
+ /* chain looks for frames and queues resulting ones (in stead of pushing) */
+ /* initial skipped data is added to buffers_pending */
+ gst_base_parse_drain (parse);
+
+push:
+ /* add metadata (if needed to queued buffers */
+ GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (parse->priv->last_ts));
+ while (parse->priv->buffers_queued) {
+ buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
+
+ /* no touching if upstream or parsing provided time */
+ if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
+ GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
+ } else if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_ts) &&
+ GST_BUFFER_DURATION_IS_VALID (buf)) {
+ if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_ts))
+ parse->priv->last_ts -= GST_BUFFER_DURATION (buf);
+ else
+ parse->priv->last_ts = 0;
+ GST_BUFFER_TIMESTAMP (buf) = parse->priv->last_ts;
+ GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
+ } else {
+ /* no idea, very bad */
+ GST_WARNING_OBJECT (parse, "could not determine time for buffer");
+ }
+
+ /* reverse order for ascending sending */
+ send = g_slist_prepend (send, buf);
+ parse->priv->buffers_queued =
+ g_slist_delete_link (parse->priv->buffers_queued,
+ parse->priv->buffers_queued);
+ }
+
+ /* send buffers */
+ while (send) {
+ buf = GST_BUFFER_CAST (send->data);
+ GST_LOG_OBJECT (parse, "pushing buffer %p, timestamp %"
+ GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
+ ", offset %" G_GINT64_FORMAT, buf,
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
+ GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
+
+ if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (parse->priv->last_ts)))
+ parse->priv->last_ts = GST_BUFFER_TIMESTAMP (buf);
+
+ /* iterate output queue an push downstream */
+ ret = gst_pad_push (parse->srcpad, buf);
+ send = g_slist_delete_link (send, send);
+
+ /* clear any leftover if error */
+ if (G_UNLIKELY (ret != GST_FLOW_OK)) {
+ while (send) {
+ buf = GST_BUFFER_CAST (send->data);
+ gst_buffer_unref (buf);
+ send = g_slist_delete_link (send, send);
+ }
+ }
+ }
+
+ /* any trailing unused no longer usable (ideally none) */
+ if (G_UNLIKELY (gst_adapter_available (parse->adapter))) {
+ GST_DEBUG_OBJECT (parse, "discarding %d trailing bytes",
+ gst_adapter_available (parse->adapter));
+ gst_adapter_clear (parse->adapter);
+ }
+
+ return ret;
+}
+
/* small helper that checks whether we have been trying to resync too long */
static inline GstFlowReturn
gst_base_parse_check_sync (GstBaseParse * parse)
guint fsize = 0;
gint skip = -1;
const guint8 *data;
- guint min_size;
+ guint min_size, av;
GstClockTime timestamp;
parse = GST_BASE_PARSE (GST_OBJECT_PARENT (pad));
if (G_UNLIKELY (parse->priv->passthrough)) {
buffer = gst_buffer_make_metadata_writable (buffer);
return gst_base_parse_push_buffer (parse, buffer);
- } else
+ }
+ /* upstream feeding us in reverse playback;
+ * gather each fragment, then process it in single run */
+ if (parse->segment.rate < 0.0) {
+ if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
+ GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
+ ret = gst_base_parse_process_fragment (parse, FALSE);
+ }
gst_adapter_push (parse->adapter, buffer);
+ return ret;
+ }
+ gst_adapter_push (parse->adapter, buffer);
}
/* Parse and push as many frames as possible */
/* Synchronization loop */
for (;;) {
- GST_BASE_PARSE_LOCK (parse);
min_size = parse->priv->min_frame_size;
- GST_BASE_PARSE_UNLOCK (parse);
+ av = gst_adapter_available (parse->adapter);
if (G_UNLIKELY (parse->priv->drain)) {
- min_size = gst_adapter_available (parse->adapter);
+ min_size = av;
GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
if (G_UNLIKELY (!min_size)) {
gst_buffer_unref (tmpbuf);
}
/* Collect at least min_frame_size bytes */
- if (gst_adapter_available (parse->adapter) < min_size) {
+ if (av < min_size) {
GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)",
- gst_adapter_available (parse->adapter));
+ av);
gst_buffer_unref (tmpbuf);
goto done;
}
- data = gst_adapter_peek (parse->adapter, min_size);
+ /* always pass all available data */
+ data = gst_adapter_peek (parse->adapter, av);
GST_BUFFER_DATA (tmpbuf) = (guint8 *) data;
GST_BUFFER_SIZE (tmpbuf) = min_size;
GST_BUFFER_OFFSET (tmpbuf) = parse->priv->offset;
gst_buffer_unref (tmpbuf);
goto done;
}
+ GST_LOG_OBJECT (parse, "valid frame of size %d at pos %d", fsize, skip);
break;
}
+ if (skip == -1) {
+ /* subclass didn't touch this value. By default we skip 1 byte */
+ skip = 1;
+ }
if (skip > 0) {
GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", skip);
- gst_adapter_flush (parse->adapter, skip);
+ if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
+ /* reverse playback, and no frames found yet, so we are skipping
+ * the leading part of a fragment, which may form the tail of
+ * fragment coming later, hopefully subclass skips efficiently ... */
+ timestamp = gst_adapter_prev_timestamp (parse->adapter, NULL);
+ outbuf = gst_adapter_take_buffer (parse->adapter, skip);
+ outbuf = gst_buffer_make_metadata_writable (outbuf);
+ GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
+ parse->priv->buffers_pending =
+ g_slist_prepend (parse->priv->buffers_pending, outbuf);
+ outbuf = NULL;
+ } else {
+ gst_adapter_flush (parse->adapter, skip);
+ }
parse->priv->offset += skip;
if (!parse->priv->discont)
parse->priv->sync_offset = parse->priv->offset;
parse->priv->discont = TRUE;
- } else if (skip == -1) {
- /* subclass didn't touch this value. By default we skip 1 byte */
- GST_LOG_OBJECT (parse, "finding sync, skipping 1 byte");
- gst_adapter_flush (parse->adapter, 1);
- parse->priv->offset++;
- if (!parse->priv->discont)
- parse->priv->sync_offset = parse->priv->offset;
- parse->priv->discont = TRUE;
}
/* There is a possibility that subclass set the skip value to zero.
This means that it has probably found a frame but wants to ask
/* Subclass may want to know the data offset */
GST_BUFFER_OFFSET (outbuf) = parse->priv->offset;
parse->priv->offset += fsize;
+ GST_BUFFER_TIMESTAMP (outbuf) = GST_CLOCK_TIME_NONE;
/* move along with upstream timestamp (if any),
* but interpolate in between */
return GST_FLOW_OK;
}
-/**
- * gst_base_parse_loop:
- * @pad: GstPad
- *
- * Loop that is used in pull mode to retrieve data from upstream.
- */
-static void
-gst_base_parse_loop (GstPad * pad)
+static GstFlowReturn
+gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
+{
+ gint64 offset = 0;
+ GstClockTime ts = 0;
+ GstBuffer *buffer;
+ GstFlowReturn ret;
+
+ GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
+ ", last_offset = %" G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->last_ts),
+ parse->priv->last_offset);
+
+ if (!parse->priv->last_offset || parse->priv->last_ts <= parse->segment.start) {
+ GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (parse->segment.start));
+ ret = GST_FLOW_UNEXPECTED;
+ goto exit;
+ }
+
+ /* last fragment started at last_offset / last_ts;
+ * seek back 10s capped at 1MB */
+ if (parse->priv->last_ts >= 10 * GST_SECOND)
+ ts = parse->priv->last_ts - 10 * GST_SECOND;
+ /* if we are exact now, we will be more so going backwards */
+ if (parse->priv->exact_position) {
+ offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
+ } else {
+ GstFormat dstformat = GST_FORMAT_BYTES;
+
+ if (!gst_pad_query_convert (parse->srcpad, GST_FORMAT_TIME, ts,
+ &dstformat, &offset)) {
+ GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
+ }
+ }
+ offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
+ parse->priv->last_offset - 1024);
+ offset = MAX (0, offset);
+
+ GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
+ offset);
+ parse->priv->offset = offset;
+
+ ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
+ &buffer);
+ if (ret != GST_FLOW_OK)
+ goto exit;
+
+ /* offset will increase again as fragment is processed/parsed */
+ parse->priv->last_offset = offset;
+
+ gst_adapter_push (parse->adapter, buffer);
+ ret = gst_base_parse_process_fragment (parse, FALSE);
+ if (ret != GST_FLOW_OK)
+ goto exit;
+
+ /* force previous fragment */
+ parse->priv->offset = -1;
+
+exit:
+ return ret;
+}
+
+/* PULL mode:
+ * pull and scan for next frame starting from current offset
+ * ajusts sync, drain and offset going along */
+static GstFlowReturn
+gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass,
+ GstBuffer ** buf, gboolean full)
{
- GstBaseParse *parse;
- GstBaseParseClass *klass;
GstBuffer *buffer, *outbuf;
- gboolean ret = FALSE;
+ GstFlowReturn ret = GST_FLOW_OK;
guint fsize = 0, min_size;
gint skip = 0;
- parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
- klass = GST_BASE_PARSE_GET_CLASS (parse);
-
- /* TODO: Check if we reach segment stop limit */
+ g_return_val_if_fail (buf != NULL, GST_FLOW_ERROR);
while (TRUE) {
- GST_BASE_PARSE_LOCK (parse);
min_size = parse->priv->min_frame_size;
- GST_BASE_PARSE_UNLOCK (parse);
ret = gst_base_parse_pull_range (parse, min_size, &buffer);
-
- if (ret == GST_FLOW_UNEXPECTED)
- goto eos;
- else if (ret != GST_FLOW_OK)
- goto pause;
+ if (ret != GST_FLOW_OK)
+ goto done;
if (parse->priv->discont) {
GST_DEBUG_OBJECT (parse, "marking DISCONT");
skip = -1;
if (klass->check_valid_frame (parse, buffer, &fsize, &skip)) {
parse->priv->drain = FALSE;
+ GST_LOG_OBJECT (parse, "valid frame of size %d at pos %d", fsize, skip);
break;
}
parse->priv->drain = FALSE;
+ if (skip == -1)
+ skip = 1;
if (skip > 0) {
GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", skip);
+ if (full && parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
+ /* reverse playback, and no frames found yet, so we are skipping
+ * the leading part of a fragment, which may form the tail of
+ * fragment coming later, hopefully subclass skips efficiently ... */
+ outbuf = gst_buffer_create_sub (buffer, 0, skip);
+ parse->priv->buffers_pending =
+ g_slist_prepend (parse->priv->buffers_pending, outbuf);
+ outbuf = NULL;
+ }
parse->priv->offset += skip;
if (!parse->priv->discont)
parse->priv->sync_offset = parse->priv->offset;
parse->priv->discont = TRUE;
- } else if (skip == -1) {
- GST_LOG_OBJECT (parse, "finding sync, skipping 1 byte");
- parse->priv->offset++;
- if (!parse->priv->discont)
- parse->priv->sync_offset = parse->priv->offset;
- parse->priv->discont = TRUE;
}
/* skip == 0 should imply subclass set min_size to need more data ... */
GST_DEBUG_OBJECT (parse, "finding sync...");
}
}
- if (fsize <= GST_BUFFER_SIZE (buffer)) {
- outbuf = gst_buffer_create_sub (buffer, 0, fsize);
- GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET (buffer);
+ /* Does the subclass want to skip too? */
+ if (skip > 0)
+ parse->priv->offset += skip;
+ else if (skip < 0)
+ skip = 0;
+
+ if (fsize + skip <= GST_BUFFER_SIZE (buffer)) {
+ outbuf = gst_buffer_create_sub (buffer, skip, fsize);
+ GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET (buffer) + skip;
+ GST_BUFFER_TIMESTAMP (outbuf) = GST_CLOCK_TIME_NONE;
gst_buffer_unref (buffer);
} else {
gst_buffer_unref (buffer);
ret = gst_base_parse_pull_range (parse, fsize, &outbuf);
-
- if (ret == GST_FLOW_UNEXPECTED)
- goto eos;
- else if (ret != GST_FLOW_OK)
- goto pause;
- if (GST_BUFFER_SIZE (outbuf) < fsize)
- goto eos;
+ if (ret != GST_FLOW_OK)
+ goto done;
+ if (GST_BUFFER_SIZE (outbuf) < fsize) {
+ gst_buffer_unref (outbuf);
+ ret = GST_FLOW_UNEXPECTED;
+ }
}
parse->priv->offset += fsize;
- /* Does the subclass want to skip too? */
- if (skip > 0)
- parse->priv->offset += skip;
+ *buf = outbuf;
+
+done:
+ return ret;
+}
+
+/**
+ * gst_base_parse_loop:
+ * @pad: GstPad
+ *
+ * Loop that is used in pull mode to retrieve data from upstream.
+ */
+static void
+gst_base_parse_loop (GstPad * pad)
+{
+ GstBaseParse *parse;
+ GstBaseParseClass *klass;
+ GstBuffer *outbuf;
+ GstFlowReturn ret = GST_FLOW_OK;
+
+ parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
+ klass = GST_BASE_PARSE_GET_CLASS (parse);
+
+ /* reverse playback:
+ * first fragment (closest to stop time) is handled normally below,
+ * then we pull in fragments going backwards */
+ if (parse->segment.rate < 0.0) {
+ /* check if we jumped back to a previous fragment,
+ * which is a post-first fragment */
+ if (parse->priv->offset < 0) {
+ ret = gst_base_parse_handle_previous_fragment (parse);
+ goto done;
+ }
+ }
+
+ ret = gst_base_parse_scan_frame (parse, klass, &outbuf, TRUE);
+ if (ret != GST_FLOW_OK)
+ goto done;
/* This always unrefs the outbuf, even if error occurs */
ret = gst_base_parse_handle_and_push_buffer (parse, klass, outbuf);
- if (ret != GST_FLOW_OK)
- goto pause;
+ /* eat expected eos signalling past segment in reverse playback */
+ if (parse->segment.rate < 0.0 && ret == GST_FLOW_UNEXPECTED &&
+ parse->segment.last_stop >= parse->segment.stop) {
+ GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
+ /* push what was accumulated during loop run */
+ gst_base_parse_process_fragment (parse, TRUE);
+ /* force previous fragment */
+ parse->priv->offset = -1;
+ ret = GST_FLOW_OK;
+ }
done:
+ if (ret == GST_FLOW_UNEXPECTED)
+ goto eos;
+ else if (ret != GST_FLOW_OK)
+ goto pause;
+
gst_object_unref (parse);
return;
/**
* gst_base_parse_activate:
* @parse: #GstBaseParse.
- * @active: TRUE if element will be activated, FALSE if disactivated.
+ * @active: TRUE if element will be activated, FALSE if deactivated.
*
* Returns: TRUE if the operation succeeded.
*/
* @duration: duration value.
*
* Sets the duration of the currently playing media. Subclass can use this
- * when it notices a change in the media duration.
- */
+ * when it is able to determine duration and/or notices a change in the media
+ * duration. Alternatively, if @interval is non-zero (default), then stream
+ * duration is determined based on estimated bitrate, and updated every @interval
+ * frames. */
void
gst_base_parse_set_duration (GstBaseParse * parse,
- GstFormat fmt, gint64 duration)
+ GstFormat fmt, gint64 duration, gint interval)
{
g_return_if_fail (parse != NULL);
- GST_BASE_PARSE_LOCK (parse);
+ if (parse->priv->upstream_has_duration) {
+ GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
+ goto exit;
+ }
+
if (duration != parse->priv->duration) {
GstMessage *m;
parse->priv->duration = duration;
parse->priv->duration_fmt = fmt;
GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
- GST_BASE_PARSE_UNLOCK (parse);
+ if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
+ if (interval != 0) {
+ GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
+ interval = 0;
+ }
+ }
+ GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
+ parse->priv->update_interval = interval;
+exit:
+ return;
}
/**
{
parse->priv->seekable = seek;
parse->priv->bitrate = bitrate;
+ GST_DEBUG_OBJECT (parse, "seek %d, bitrate %d", seek, bitrate);
}
{
g_return_if_fail (parse != NULL);
- GST_BASE_PARSE_LOCK (parse);
parse->priv->min_frame_size = min_size;
GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
- GST_BASE_PARSE_UNLOCK (parse);
}
/**
- * gst_base_transform_set_passthrough:
- * @trans: the #GstBaseParse to set
+ * gst_base_parse_set_passthrough:
+ * @parse: the #GstBaseParse to set
* @passthrough: boolean indicating passthrough mode.
*
* Set passthrough mode for this parser. If operating in passthrough,
{
g_return_if_fail (parse != NULL);
- GST_BASE_PARSE_LOCK (parse);
parse->priv->passthrough = passthrough;
GST_LOG_OBJECT (parse, "set passthrough: %d", passthrough);
- GST_BASE_PARSE_UNLOCK (parse);
}
/**
- * gst_base_transform_set_frame_props:
+ * gst_base_parse_set_frame_props:
* @parse: the #GstBaseParse to set
* @fps_num: frames per second (numerator).
* @fps_den: frames per second (denominator).
- * @interval: duration update interval in frames.
+ * @lead_in: frames needed before a segment for subsequent decode
+ * @lead_out: frames needed after a segment
*
* If frames per second is configured, parser can take care of buffer duration
- * and timestamping. If #interval is non-zero (default), then stream duration
- * is determined based on frame and byte counts, and updated every #interval
- * frames.
+ * and timestamping. When performing segment clipping, or seeking to a specific
+ * location, a corresponding decoder might need an initial @lead_in and a
+ * following @lead_out number of frames to ensure the desired segment is
+ * entirely filled upon decoding.
*/
void
gst_base_parse_set_frame_props (GstBaseParse * parse, guint fps_num,
- guint fps_den, gint interval)
+ guint fps_den, guint lead_in, guint lead_out)
{
g_return_if_fail (parse != NULL);
- GST_BASE_PARSE_LOCK (parse);
parse->priv->fps_num = fps_num;
parse->priv->fps_den = fps_den;
- parse->priv->update_interval = interval;
if (!fps_num || !fps_den) {
GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
fps_num, fps_den);
fps_num = fps_den = 0;
- interval = 0;
parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
+ parse->priv->lead_in = parse->priv->lead_out = 0;
+ parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
} else {
parse->priv->frame_duration =
- gst_util_uint64_scale (GST_SECOND, parse->priv->fps_den,
- parse->priv->fps_num);
+ gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
+ parse->priv->lead_in = lead_in;
+ parse->priv->lead_out = lead_out;
+ parse->priv->lead_in_ts =
+ gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
+ parse->priv->lead_out_ts =
+ gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
}
GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
- GST_LOG_OBJECT (parse, "set update interval: %d", interval);
- GST_BASE_PARSE_UNLOCK (parse);
+ GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
+ "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
+ lead_in, parse->priv->lead_in_ts / GST_MSECOND,
+ lead_out, parse->priv->lead_out_ts / GST_MSECOND);
}
/**
- * gst_base_transform_get_sync:
+ * gst_base_parse_get_sync:
* @parse: the #GstBaseParse to query
*
* Returns: TRUE if parser is considered 'in sync'. That is, frames have been
g_return_val_if_fail (parse != NULL, FALSE);
- GST_BASE_PARSE_LOCK (parse);
/* losing sync is pretty much a discont (and vice versa), no ? */
ret = !parse->priv->discont;
- GST_BASE_PARSE_UNLOCK (parse);
GST_DEBUG_OBJECT (parse, "sync: %d", ret);
return ret;
}
/**
- * gst_base_transform_get_drain:
+ * gst_base_parse_get_drain:
* @parse: the #GstBaseParse to query
*
* Returns: TRUE if parser is currently 'draining'. That is, leftover data
g_return_val_if_fail (parse != NULL, FALSE);
- GST_BASE_PARSE_LOCK (parse);
/* losing sync is pretty much a discont (and vice versa), no ? */
ret = parse->priv->drain;
- GST_BASE_PARSE_UNLOCK (parse);
GST_DEBUG_OBJECT (parse, "drain: %d", ret);
return ret;
gst_base_parse_query (GstPad * pad, GstQuery * query)
{
GstBaseParse *parse;
- GstBaseParseClass *klass;
gboolean res = FALSE;
parse = GST_BASE_PARSE (GST_PAD_PARENT (pad));
- klass = GST_BASE_PARSE_GET_CLASS (parse);
GST_LOG_OBJECT (parse, "handling query: %" GST_PTR_FORMAT, query);
GST_DEBUG_OBJECT (parse, "position query");
gst_query_parse_position (query, &format, NULL);
- g_mutex_lock (parse->parse_lock);
+ GST_OBJECT_LOCK (parse);
if (format == GST_FORMAT_BYTES) {
dest_value = parse->priv->offset;
res = TRUE;
dest_value = parse->segment.last_stop;
res = TRUE;
}
- g_mutex_unlock (parse->parse_lock);
+ GST_OBJECT_UNLOCK (parse);
if (res)
gst_query_set_position (query, format, dest_value);
if (!res) {
/* no precise result, upstream no idea either, then best estimate */
/* priv->offset is updated in both PUSH/PULL modes */
- g_mutex_lock (parse->parse_lock);
res = gst_base_parse_convert (parse,
GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
- g_mutex_unlock (parse->parse_lock);
}
}
break;
/* otherwise best estimate from us */
if (!res) {
- g_mutex_lock (parse->parse_lock);
res = gst_base_parse_get_duration (parse, format, &duration);
- g_mutex_unlock (parse->parse_lock);
if (res)
gst_query_set_duration (query, format, duration);
}
GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
res, seekable);
if (!(res && seekable)) {
- /* TODO maybe also check upstream provides proper duration ? */
- seekable = TRUE;
if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
|| duration == -1) {
seekable = FALSE;
} else {
- GstQuery *q;
-
- q = gst_query_new_seeking (GST_FORMAT_BYTES);
- if (!gst_pad_peer_query (parse->sinkpad, q)) {
- seekable = FALSE;
- } else {
- gst_query_parse_seeking (q, &fmt, &seekable, NULL, NULL);
- }
- GST_LOG_OBJECT (parse, "upstream BYTE handled %d, seekable %d",
- res, seekable);
- gst_query_unref (q);
+ seekable = parse->priv->upstream_seekable;
+ GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
+ seekable);
}
gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
res = TRUE;
return res;
}
+/* scans for a cluster start from @pos,
+ * return GST_FLOW_OK and frame position/time in @pos/@time if found */
+static GstFlowReturn
+gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
+ GstClockTime * time, GstClockTime * duration)
+{
+ GstBaseParseClass *klass;
+ gint64 orig_offset;
+ gboolean orig_drain, orig_discont;
+ GstFlowReturn ret = GST_FLOW_OK;
+ GstBuffer *buf = NULL;
+
+ g_return_val_if_fail (GST_FLOW_ERROR, pos != NULL);
+ g_return_val_if_fail (GST_FLOW_ERROR, time != NULL);
+ g_return_val_if_fail (GST_FLOW_ERROR, duration != NULL);
+
+ klass = GST_BASE_PARSE_GET_CLASS (parse);
+
+ *time = GST_CLOCK_TIME_NONE;
+ *duration = GST_CLOCK_TIME_NONE;
+
+ /* save state */
+ orig_offset = parse->priv->offset;
+ orig_discont = parse->priv->discont;
+ orig_drain = parse->priv->drain;
+
+ GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
+ " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
+
+ /* jump elsewhere and locate next frame */
+ parse->priv->offset = *pos;
+ ret = gst_base_parse_scan_frame (parse, klass, &buf, FALSE);
+ if (ret != GST_FLOW_OK)
+ goto done;
+
+ GST_LOG_OBJECT (parse,
+ "peek parsing frame at offset %" G_GUINT64_FORMAT
+ " (%#" G_GINT64_MODIFIER "x) of size %d",
+ GST_BUFFER_OFFSET (buf), GST_BUFFER_OFFSET (buf), GST_BUFFER_SIZE (buf));
+
+ /* get offset first, subclass parsing might dump other stuff in there */
+ *pos = GST_BUFFER_OFFSET (buf);
+ ret = klass->parse_frame (parse, buf);
+
+ /* but it should provide proper time */
+ *time = GST_BUFFER_TIMESTAMP (buf);
+ *duration = GST_BUFFER_DURATION (buf);
+ gst_buffer_unref (buf);
+
+ GST_LOG_OBJECT (parse,
+ "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
+ GST_TIME_ARGS (*time), *pos);
+
+done:
+ /* restore state */
+ parse->priv->offset = orig_offset;
+ parse->priv->discont = orig_discont;
+ parse->priv->drain = orig_drain;
+
+ return ret;
+}
+
+/* bisect and scan through file for frame starting before @time,
+ * returns OK and @time/@offset if found, NONE and/or error otherwise
+ * If @time == G_MAXINT64, scan for duration ( == last frame) */
+static GstFlowReturn
+gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
+ gint64 * _offset)
+{
+ GstFlowReturn ret = GST_FLOW_OK;
+ gint64 lpos, hpos, newpos;
+ GstClockTime time, ltime, htime, newtime, dur;
+ gboolean cont = TRUE;
+ const GstClockTime tolerance = TARGET_DIFFERENCE;
+ const guint chunk = 4 * 1024;
+
+ g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
+ g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
+
+ /* TODO also make keyframe aware if useful some day */
+
+ time = *_time;
+
+ /* basic cases */
+ if (time == 0) {
+ *_offset = 0;
+ return GST_FLOW_OK;
+ }
+
+ if (time == -1) {
+ *_offset = -1;
+ return GST_FLOW_OK;
+ }
+
+ /* do not know at first */
+ *_offset = -1;
+ *_time = GST_CLOCK_TIME_NONE;
+
+ /* need initial positions; start and end */
+ lpos = parse->priv->first_frame_offset;
+ ltime = parse->priv->first_frame_ts;
+ htime = parse->priv->duration;
+ hpos = parse->priv->upstream_size;
+
+ /* check preconditions are satisfied;
+ * start and end are needed, except for special case where we scan for
+ * last frame to determine duration */
+ if (parse->priv->pad_mode != GST_ACTIVATE_PULL || !hpos ||
+ !GST_CLOCK_TIME_IS_VALID (ltime) ||
+ (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
+ return GST_FLOW_OK;
+ }
+
+ /* shortcut cases */
+ if (time < ltime) {
+ goto exit;
+ } else if (time < ltime + tolerance) {
+ *_offset = lpos;
+ *_time = ltime;
+ goto exit;
+ } else if (time >= htime) {
+ *_offset = hpos;
+ *_time = htime;
+ goto exit;
+ }
+
+ while (htime > ltime && cont) {
+ GST_LOG_OBJECT (parse,
+ "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
+ GST_TIME_ARGS (ltime));
+ GST_LOG_OBJECT (parse,
+ "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
+ GST_TIME_ARGS (htime));
+ if (G_UNLIKELY (time == G_MAXINT64)) {
+ newpos = hpos;
+ } else if (G_LIKELY (hpos > lpos)) {
+ newpos =
+ gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
+ lpos - chunk;
+ } else {
+ /* should mean lpos == hpos, since lpos <= hpos is invariant */
+ newpos = lpos;
+ /* we check this case once, but not forever, so break loop */
+ cont = FALSE;
+ }
+
+ /* ensure */
+ newpos = CLAMP (newpos, lpos, hpos);
+ GST_LOG_OBJECT (parse,
+ "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
+ GST_TIME_ARGS (time), newpos);
+
+ ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
+ if (ret == GST_FLOW_UNEXPECTED) {
+ /* heuristic HACK */
+ hpos = MAX (lpos, hpos - chunk);
+ continue;
+ } else if (ret != GST_FLOW_OK) {
+ goto exit;
+ }
+
+ if (newtime == -1 || newpos == -1) {
+ GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
+ break;
+ }
+
+ if (G_UNLIKELY (time == G_MAXINT64)) {
+ *_offset = newpos;
+ *_time = newtime;
+ if (GST_CLOCK_TIME_IS_VALID (dur))
+ *_time += dur;
+ break;
+ } else if (newtime > time) {
+ /* overshoot */
+ hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
+ htime = newtime;
+ } else if (newtime + tolerance > time) {
+ /* close enough undershoot */
+ *_offset = newpos;
+ *_time = newtime;
+ break;
+ } else if (newtime < ltime) {
+ /* so a position beyond lpos resulted in earlier time than ltime ... */
+ GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
+ break;
+ } else {
+ /* undershoot too far */
+ newpos += newpos == lpos ? chunk : 0;
+ lpos = CLAMP (newpos, lpos, hpos);
+ ltime = newtime;
+ }
+ }
+
+exit:
+ GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
+ GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
+ return ret;
+}
+
+static gint64
+gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
+ gboolean before, GstClockTime * _ts)
+{
+ gint64 bytes = 0, ts = 0;
+ GstIndexEntry *entry = NULL;
+
+ if (time == GST_CLOCK_TIME_NONE) {
+ ts = time;
+ bytes = -1;
+ goto exit;
+ }
+
+ GST_OBJECT_LOCK (parse);
+ if (parse->priv->index) {
+ /* Let's check if we have an index entry for that time */
+ entry = gst_index_get_assoc_entry (parse->priv->index,
+ parse->priv->index_id,
+ before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
+ GST_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
+ }
+
+ if (entry) {
+ gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
+ gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
+
+ GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
+ " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
+ GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
+ } else {
+ GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (time));
+ if (!before) {
+ bytes = -1;
+ ts = GST_CLOCK_TIME_NONE;
+ }
+ }
+ GST_OBJECT_UNLOCK (parse);
+
+exit:
+ if (_ts)
+ *_ts = ts;
+
+ return bytes;
+}
+
/**
* gst_base_parse_handle_seek:
static gboolean
gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
{
- GstBaseParseClass *klass;
gdouble rate;
GstFormat format;
GstSeekFlags flags;
GstSeekType cur_type = GST_SEEK_TYPE_NONE, stop_type;
- gboolean flush, update, res = TRUE;
- gint64 cur, stop, seekpos;
+ gboolean flush, update, res = TRUE, accurate;
+ gint64 cur, stop, seekpos, seekstop;
GstSegment seeksegment = { 0, };
GstFormat dstformat;
-
- klass = GST_BASE_PARSE_GET_CLASS (parse);
+ GstClockTime start_ts;
gst_event_parse_seek (event, &rate, &format, &flags,
&cur_type, &cur, &stop_type, &stop);
- GST_DEBUG_OBJECT (parse, "seek to format %s, "
+ GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
"start type %d at %" GST_TIME_FORMAT ", end type %d at %"
- GST_TIME_FORMAT, gst_format_get_name (format),
+ GST_TIME_FORMAT, gst_format_get_name (format), rate,
cur_type, GST_TIME_ARGS (cur), stop_type, GST_TIME_ARGS (stop));
- /* no negative rates yet */
- if (rate < 0.0)
+ /* no negative rates in push mode */
+ if (rate < 0.0 && parse->priv->pad_mode == GST_ACTIVATE_PUSH)
goto negative_rate;
if (cur_type != GST_SEEK_TYPE_SET ||
gst_segment_set_seek (&seeksegment, rate, format, flags,
cur_type, cur, stop_type, stop, &update);
- dstformat = GST_FORMAT_BYTES;
- if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.last_stop,
- &dstformat, &seekpos))
- goto convert_failed;
+ /* accurate seeking implies seek tables are used to obtain position,
+ * and the requested segment is maintained exactly, not adjusted any way */
+ accurate = flags & GST_SEEK_FLAG_ACCURATE;
+
+ /* maybe we can be accurate for (almost) free */
+ gst_base_parse_find_offset (parse, seeksegment.last_stop, TRUE, &start_ts);
+ if (seeksegment.last_stop <= start_ts + TARGET_DIFFERENCE) {
+ GST_DEBUG_OBJECT (parse, "accurate seek possible");
+ accurate = TRUE;
+ }
+ if (accurate) {
+ GstClockTime startpos = seeksegment.last_stop;
+
+ /* accurate requested, so ... seek a bit before target */
+ if (startpos < parse->priv->lead_in_ts)
+ startpos = 0;
+ else
+ startpos -= parse->priv->lead_in_ts;
+ seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
+ seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
+ NULL);
+ } else {
+ start_ts = seeksegment.last_stop;
+ dstformat = GST_FORMAT_BYTES;
+ if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.last_stop,
+ &dstformat, &seekpos))
+ goto convert_failed;
+ if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.stop,
+ &dstformat, &seekstop))
+ goto convert_failed;
+ }
GST_DEBUG_OBJECT (parse,
- "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT, cur,
- seekpos);
+ "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
+ start_ts, seekpos);
+ GST_DEBUG_OBJECT (parse,
+ "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
+ seeksegment.stop, seekstop);
if (parse->priv->pad_mode == GST_ACTIVATE_PULL) {
gint64 last_stop;
if (parse->srcpad) {
GST_DEBUG_OBJECT (parse, "sending flush start");
gst_pad_push_event (parse->srcpad, gst_event_new_flush_start ());
+ /* unlock upstream pull_range */
+ gst_pad_push_event (parse->sinkpad, gst_event_new_flush_start ());
}
} else {
gst_pad_pause_task (parse->sinkpad);
if (flush) {
GST_DEBUG_OBJECT (parse, "sending flush stop");
gst_pad_push_event (parse->srcpad, gst_event_new_flush_stop ());
+ gst_pad_push_event (parse->sinkpad, gst_event_new_flush_stop ());
+ gst_base_parse_clear_queues (parse);
} else {
if (parse->close_segment)
gst_event_unref (parse->close_segment);
/* This will be sent later in _loop() */
parse->pending_segment =
gst_event_new_new_segment (FALSE, parse->segment.rate,
- parse->segment.format, parse->segment.last_stop, parse->segment.stop,
- parse->segment.last_stop);
+ parse->segment.format, parse->segment.start, parse->segment.stop,
+ parse->segment.start);
GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
"start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
", pos = %" GST_TIME_FORMAT, format,
- GST_TIME_ARGS (parse->segment.last_stop),
- GST_TIME_ARGS (stop), GST_TIME_ARGS (parse->segment.last_stop));
+ GST_TIME_ARGS (parse->segment.start),
+ GST_TIME_ARGS (parse->segment.stop),
+ GST_TIME_ARGS (parse->segment.start));
+
+ /* one last chance in pull mode to stay accurate;
+ * maybe scan and subclass can find where to go */
+ if (!accurate) {
+ gint64 scanpos;
+ GstClockTime ts = seeksegment.last_stop;
+
+ gst_base_parse_locate_time (parse, &ts, &scanpos);
+ if (scanpos >= 0) {
+ accurate = TRUE;
+ seekpos = scanpos;
+ /* running collected index now consists of several intervals,
+ * so optimized check no longer possible */
+ parse->priv->index_last_valid = FALSE;
+ parse->priv->index_last_offset = 0;
+ parse->priv->index_last_ts = 0;
+ }
+ }
/* mark discont if we are going to stream from another position. */
if (seekpos != parse->priv->offset) {
GST_DEBUG_OBJECT (parse,
"mark DISCONT, we did a seek to another position");
parse->priv->offset = seekpos;
+ parse->priv->last_offset = seekpos;
+ parse->priv->seen_keyframe = FALSE;
parse->priv->discont = TRUE;
- parse->priv->next_ts = parse->segment.last_stop;
+ parse->priv->next_ts = start_ts;
+ parse->priv->last_ts = GST_CLOCK_TIME_NONE;
parse->priv->sync_offset = seekpos;
+ parse->priv->exact_position = accurate;
}
/* Start streaming thread if paused */
GST_PAD_STREAM_UNLOCK (parse->sinkpad);
} else {
GstEvent *new_event;
- gint64 stop_pos;
+ GstBaseParseSeek *seek;
/* The only thing we need to do in PUSH-mode is to send the
seek event (in bytes) to upstream. Segment / flush handling happens
in corresponding src event handlers */
GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
-
- /* already converted start, need same for stop */
- dstformat = GST_FORMAT_BYTES;
- if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.start,
- &dstformat, &stop_pos))
- goto convert_failed;
+ if (seekstop >= 0 && seekpos <= seekpos)
+ seekstop = seekpos;
new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flush,
- GST_SEEK_TYPE_SET, seekpos, stop_type, stop_pos);
+ GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
+
+ /* store segment info so its precise details can be reconstructed when
+ * receiving newsegment;
+ * this matters for all details when accurate seeking,
+ * is most useful to preserve NONE stop time otherwise */
+ seek = g_new0 (GstBaseParseSeek, 1);
+ seek->segment = seeksegment;
+ seek->accurate = accurate;
+ seek->offset = seekpos;
+ seek->start_ts = start_ts;
+ GST_OBJECT_LOCK (parse);
+ /* less optimal, but preserves order */
+ parse->priv->pending_seeks =
+ g_slist_append (parse->priv->pending_seeks, seek);
+ GST_OBJECT_UNLOCK (parse);
res = gst_pad_push_event (parse->sinkpad, new_event);
+
+ if (!res) {
+ GST_OBJECT_LOCK (parse);
+ parse->priv->pending_seeks =
+ g_slist_remove (parse->priv->pending_seeks, seek);
+ GST_OBJECT_UNLOCK (parse);
+ g_free (seek);
+ }
}
done:
gst_event_parse_tag (event, &taglist);
- if (gst_tag_list_get_uint (taglist, GST_TAG_MINIMUM_BITRATE, &tmp))
+ if (gst_tag_list_get_uint (taglist, GST_TAG_MINIMUM_BITRATE, &tmp)) {
+ GST_DEBUG_OBJECT (parse, "upstream min bitrate %d", tmp);
parse->priv->post_min_bitrate = FALSE;
- if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp))
+ }
+ if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp)) {
+ GST_DEBUG_OBJECT (parse, "upstream avg bitrate %d", tmp);
parse->priv->post_avg_bitrate = FALSE;
- if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp))
+ }
+ if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp)) {
+ GST_DEBUG_OBJECT (parse, "upstream max bitrate %d", tmp);
parse->priv->post_max_bitrate = FALSE;
+ }
}
/**
projects / platform / upstream / gstreamer.git / blobdiff