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- Added seek on bytes

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Original commit message from CVS:
- Added seek on bytes
- use index to lookup offsets
This commit is contained in:
Wim Taymans 2002-12-23 00:35:24 +00:00
parent d9bf04bce7
commit b9072f711a
1 changed files with 40 additions and 13 deletions
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49
gst/mpegstream/gstmpegparse.c
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@ -351,7 +351,7 @@ gst_mpeg_parse_parse_packhead (GstMPEGParse *mpeg_parse, GstBuffer *buffer)
scr = scr_adj;
}
if (mpeg_parse->index) {
if (mpeg_parse->index && GST_INDEX_IS_WRITABLE (mpeg_parse->index)) {
/* update index if any */
gst_index_add_association (mpeg_parse->index, mpeg_parse->index_id,
GST_ACCOCIATION_FLAG_KEY_UNIT,
@ -514,6 +514,7 @@ const GstFormat*
gst_mpeg_parse_get_src_formats (GstPad *pad)
{
static const GstFormat formats[] = {
GST_FORMAT_BYTES,
GST_FORMAT_TIME,
0
};
@ -603,10 +604,28 @@ gst_mpeg_parse_get_src_event_masks (GstPad *pad)
return masks;
}
static gboolean
seek_index (GstMPEGParse *parse, GstEvent *event, guint64 *offset)
{
GstIndexEntry *entry;
entry = gst_index_get_assoc_entry (parse->index, parse->index_id,
GST_INDEX_LOOKUP_BEFORE,
GST_EVENT_SEEK_FORMAT (event),
GST_EVENT_SEEK_OFFSET (event));
if (!entry)
return FALSE;
if (gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, offset)) {
return TRUE;
}
return FALSE;
}
gboolean
gst_mpeg_parse_handle_src_event (GstPad *pad, GstEvent *event)
{
gboolean res = TRUE;
gboolean res = FALSE;
GstMPEGParse *mpeg_parse = GST_MPEG_PARSE (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
@ -614,28 +633,36 @@ gst_mpeg_parse_handle_src_event (GstPad *pad, GstEvent *event)
{
guint64 desired_offset;
if (GST_EVENT_SEEK_FORMAT (event) != GST_FORMAT_TIME) {
gst_event_unref (event);
return FALSE;
switch (GST_EVENT_SEEK_FORMAT (event)) {
case GST_FORMAT_BYTES:
if (mpeg_parse->index) {
if (!seek_index (mpeg_parse, event, &desired_offset)) {
goto done;
}
if (GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH) {
}
else {
desired_offset = GST_EVENT_SEEK_OFFSET (event);
}
break;
case GST_FORMAT_TIME:
desired_offset = mpeg_parse->mux_rate * 50 * GST_EVENT_SEEK_OFFSET (event) / (GST_SECOND);
break;
default:
goto done;
}
if (!gst_bytestream_seek (mpeg_parse->packetize->bs, desired_offset, GST_SEEK_METHOD_SET)) {
gst_event_unref (event);
return FALSE;
goto done;
}
mpeg_parse->discont_pending = TRUE;
mpeg_parse->scr_pending = TRUE;
res = TRUE;
break;
}
default:
res = FALSE;
break;
}
done:
gst_event_unref (event);
return res;
}