gst/flv/gstflvdemux.c: Implement seeking in push mode.

Original commit message from CVS:
2007-08-24  Julien MOUTTE  <julien@moutte.net>

* gst/flv/gstflvdemux.c: (gst_flv_demux_flush),
(gst_flv_demux_cleanup), (gst_flv_demux_chain),
(gst_flv_demux_pull_tag), (gst_flv_demux_find_offset),
(gst_flv_demux_handle_seek_push),
(gst_flv_demux_handle_seek_pull),
(gst_flv_demux_sink_event), (gst_flv_demux_src_event): Implement
seeking in push mode.
* gst/flv/gstflvdemux.h:
This commit is contained in:
Julien Moutte 2007-08-24 15:31:26 +00:00
parent b4c31f289b
commit b86971338f
3 changed files with 176 additions and 35 deletions

View file

@ -1,3 +1,13 @@
2007-08-24 Julien MOUTTE <julien@moutte.net>
* gst/flv/gstflvdemux.c: (gst_flv_demux_flush),
(gst_flv_demux_cleanup), (gst_flv_demux_chain),
(gst_flv_demux_pull_tag), (gst_flv_demux_find_offset),
(gst_flv_demux_handle_seek_push), (gst_flv_demux_handle_seek_pull),
(gst_flv_demux_sink_event), (gst_flv_demux_src_event): Implement
seeking in push mode.
* gst/flv/gstflvdemux.h:
2007-08-24 Zaheer Abbas Merali <zaheerabbas at merali dot org>
* gst/mpegtsparse/flutspatinfo.c:

View file

@ -68,6 +68,16 @@ gst_flv_demux_flush (GstFLVDemux * demux, gboolean discont)
demux->audio_need_discont = TRUE;
demux->video_need_discont = TRUE;
demux->flushing = FALSE;
/* Only in push mode */
if (!demux->random_access) {
/* After a flush we expect a tag_type */
demux->state = FLV_STATE_TAG_TYPE;
/* We reset the offset and will get one from first push */
demux->offset = 0;
}
}
static void
@ -77,6 +87,7 @@ gst_flv_demux_cleanup (GstFLVDemux * demux)
demux->state = FLV_STATE_HEADER;
demux->flushing = FALSE;
demux->need_header = TRUE;
demux->audio_need_segment = TRUE;
demux->video_need_segment = TRUE;
@ -146,9 +157,28 @@ gst_flv_demux_chain (GstPad * pad, GstBuffer * buffer)
demux = GST_FLV_DEMUX (gst_pad_get_parent (pad));
GST_LOG_OBJECT (demux, "received buffer of %d bytes at offset %"
G_GUINT64_FORMAT, GST_BUFFER_SIZE (buffer), GST_BUFFER_OFFSET (buffer));
if (G_UNLIKELY (GST_BUFFER_OFFSET (buffer) == 0)) {
GST_DEBUG_OBJECT (demux, "beginning of file, expect header");
demux->state = FLV_STATE_HEADER;
demux->offset = 0;
}
if (G_UNLIKELY (demux->offset == 0)) {
GST_DEBUG_OBJECT (demux, "offset was zero, synchronizing with buffer's");
demux->offset = GST_BUFFER_OFFSET (buffer);
}
gst_adapter_push (demux->adapter, buffer);
parse:
if (G_UNLIKELY (demux->flushing)) {
GST_DEBUG_OBJECT (demux, "we are now flushing, exiting parser loop");
ret = GST_FLOW_WRONG_STATE;
goto beach;
}
switch (demux->state) {
case FLV_STATE_HEADER:
{
@ -502,52 +532,134 @@ pause:
}
}
static gboolean
gst_flv_demux_do_seek (GstFLVDemux * demux, GstSegment * segment)
static guint64
gst_flv_demux_find_offset (GstFLVDemux * demux, GstSegment * segment)
{
gboolean ret = FALSE;
gint64 bytes = 0;
gint64 time = 0;
GstIndexEntry *entry;
g_return_val_if_fail (segment != NULL, 0);
time = segment->start;
if (demux->index) {
/* Let's check if we have an index entry for that seek time */
entry = gst_index_get_assoc_entry (demux->index, demux->index_id,
GST_INDEX_LOOKUP_BEFORE, GST_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME,
segment->start);
time);
if (entry) {
gint64 bytes = 0;
gint64 time = 0;
gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &time);
demux->offset = bytes;
demux->state = FLV_STATE_TAG_TYPE;
GST_DEBUG_OBJECT (demux, "found index entry for %" GST_TIME_FORMAT
" at %" GST_TIME_FORMAT ", seeking to %" G_GINT64_FORMAT,
GST_TIME_ARGS (segment->start), GST_TIME_ARGS (time), bytes);
/* Key frame seeking */
if (demux->segment->flags & GST_SEEK_FLAG_KEY_UNIT) {
if (segment->flags & GST_SEEK_FLAG_KEY_UNIT) {
/* Adjust the segment so that the keyframe fits in */
if (time < segment->start) {
segment->start = segment->time = time;
}
segment->last_stop = time;
}
ret = TRUE;
} else {
GST_DEBUG_OBJECT (demux, "no index entry found for %" GST_TIME_FORMAT,
GST_TIME_ARGS (segment->start));
ret = FALSE;
}
}
return ret;
return bytes;
}
static gboolean
gst_flv_demux_handle_seek (GstFLVDemux * demux, GstEvent * event)
gst_flv_demux_handle_seek_push (GstFLVDemux * demux, GstEvent * event)
{
GstFormat format;
GstSeekFlags flags;
GstSeekType start_type, stop_type;
gint64 start, stop;
gdouble rate;
gboolean update, flush, keyframe, ret;
GstSegment seeksegment;
gst_event_parse_seek (event, &rate, &format, &flags,
&start_type, &start, &stop_type, &stop);
if (format != GST_FORMAT_TIME)
goto wrong_format;
flush = flags & GST_SEEK_FLAG_FLUSH;
keyframe = flags & GST_SEEK_FLAG_KEY_UNIT;
/* Work on a copy until we are sure the seek succeeded. */
memcpy (&seeksegment, demux->segment, sizeof (GstSegment));
GST_DEBUG_OBJECT (demux, "segment before configure %" GST_SEGMENT_FORMAT,
demux->segment);
/* Apply the seek to our segment */
gst_segment_set_seek (&seeksegment, rate, format, flags,
start_type, start, stop_type, stop, &update);
GST_DEBUG_OBJECT (demux, "segment configured %" GST_SEGMENT_FORMAT,
&seeksegment);
if (flush || seeksegment.last_stop != demux->segment->last_stop) {
/* Do the actual seeking */
guint64 offset = gst_flv_demux_find_offset (demux, &seeksegment);
GST_DEBUG_OBJECT (demux, "generating an upstream seek at position %"
G_GUINT64_FORMAT, offset);
ret = gst_pad_push_event (demux->sinkpad,
gst_event_new_seek (seeksegment.rate, GST_FORMAT_BYTES,
GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_ACCURATE, GST_SEEK_TYPE_SET,
offset, GST_SEEK_TYPE_NONE, 0));
if (G_UNLIKELY (!ret)) {
GST_WARNING_OBJECT (demux, "upstream seek failed");
}
} else {
ret = TRUE;
}
if (ret) {
/* Ok seek succeeded, take the newly configured segment */
memcpy (demux->segment, &seeksegment, sizeof (GstSegment));
/* Notify about the start of a new segment */
if (demux->segment->flags & GST_SEEK_FLAG_SEGMENT) {
gst_element_post_message (GST_ELEMENT (demux),
gst_message_new_segment_start (GST_OBJECT (demux),
demux->segment->format, demux->segment->last_stop));
}
/* Tell all the stream a new segment is needed */
{
demux->audio_need_segment = TRUE;
demux->video_need_segment = TRUE;
/* Clean any potential newsegment event kept for the streams. The first
* stream needing a new segment will create a new one. */
if (G_UNLIKELY (demux->new_seg_event)) {
gst_event_unref (demux->new_seg_event);
demux->new_seg_event = NULL;
}
}
}
return ret;
/* ERRORS */
wrong_format:
{
GST_WARNING_OBJECT (demux, "we only support seeking in TIME format");
return FALSE;
}
}
static gboolean
gst_flv_demux_handle_seek_pull (GstFLVDemux * demux, GstEvent * event)
{
GstFormat format;
GstSeekFlags flags;
@ -599,7 +711,14 @@ gst_flv_demux_handle_seek (GstFLVDemux * demux, GstEvent * event)
if (flush || seeksegment.last_stop != demux->segment->last_stop) {
/* Do the actual seeking */
ret = gst_flv_demux_do_seek (demux, &seeksegment);
demux->offset = gst_flv_demux_find_offset (demux, &seeksegment);
/* If we seeked at the beginning of the file parse the header again */
if (G_UNLIKELY (!demux->offset)) {
demux->state = FLV_STATE_HEADER;
} else { /* or parse a tag */
demux->state = FLV_STATE_TAG_TYPE;
}
} else {
ret = TRUE;
}
@ -728,12 +847,17 @@ gst_flv_demux_sink_event (GstPad * pad, GstEvent * event)
demux = GST_FLV_DEMUX (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (demux, "handling event %s", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
GST_DEBUG_OBJECT (demux, "trying to force chain function to exit");
demux->flushing = TRUE;
ret = gst_pad_event_default (demux->sinkpad, event);
break;
case GST_EVENT_FLUSH_STOP:
GST_DEBUG_OBJECT (demux, "flushing FLV demuxer");
gst_flv_demux_flush (demux, TRUE);
gst_adapter_clear (demux->adapter);
gst_segment_init (demux->segment, GST_FORMAT_TIME);
ret = gst_pad_event_default (demux->sinkpad, event);
break;
case GST_EVENT_EOS:
@ -803,9 +927,15 @@ gst_flv_demux_src_event (GstPad * pad, GstEvent * event)
demux = GST_FLV_DEMUX (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (demux, "handling event %s", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
ret = gst_flv_demux_handle_seek (demux, event);
if (demux->random_access) {
ret = gst_flv_demux_handle_seek_pull (demux, event);
} else {
ret = gst_flv_demux_handle_seek_push (demux, event);
}
break;
default:
ret = gst_pad_push_event (demux->sinkpad, event);

View file

@ -107,6 +107,7 @@ struct _GstFLVDemux
gboolean has_video;
gboolean push_tags;
gboolean strict;
gboolean flushing;
};
struct _GstFLVDemuxClass