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baseparse: refactor frame scanning peformed by _loop

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Mark Nauwelaerts 2010-11-16 17:06:14 +01:00 committed by Tim-Philipp Müller
parent 10eae096fe
commit 454f21f077
1 changed files with 50 additions and 26 deletions
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76
gst/audioparsers/gstbaseparse.c
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@ -2072,34 +2072,19 @@ exit:
return ret; return ret;
} }
/** /* PULL mode:
* gst_base_parse_loop: * pull and scan for next frame starting from current offset
* @pad: GstPad * ajusts sync, drain and offset going along */
* static GstFlowReturn
* Loop that is used in pull mode to retrieve data from upstream. gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass,
*/ GstBuffer ** buf, gboolean full)
static void
gst_base_parse_loop (GstPad * pad)
{ {
GstBaseParse *parse;
GstBaseParseClass *klass;
GstBuffer *buffer, *outbuf; GstBuffer *buffer, *outbuf;
GstFlowReturn ret = FALSE; GstFlowReturn ret = GST_FLOW_OK;
guint fsize = 0, min_size; guint fsize = 0, min_size;
gint skip = 0; gint skip = 0;
parse = GST_BASE_PARSE (gst_pad_get_parent (pad)); g_return_val_if_fail (buf != NULL, GST_FLOW_ERROR);
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) {
if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_ts)) {
ret = gst_base_parse_handle_previous_fragment (parse);
goto done;
}
}
while (TRUE) { while (TRUE) {
@ -2131,7 +2116,7 @@ gst_base_parse_loop (GstPad * pad)
skip = 1; skip = 1;
if (skip > 0) { if (skip > 0) {
GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", skip); GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", skip);
if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) { if (full && parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
/* reverse playback, and no frames found yet, so we are skipping /* reverse playback, and no frames found yet, so we are skipping
* the leading part of a fragment, which may form the tail of * the leading part of a fragment, which may form the tail of
* fragment coming later, hopefully subclass skips efficiently ... */ * fragment coming later, hopefully subclass skips efficiently ... */
@ -2162,8 +2147,10 @@ gst_base_parse_loop (GstPad * pad)
ret = gst_base_parse_pull_range (parse, fsize, &outbuf); ret = gst_base_parse_pull_range (parse, fsize, &outbuf);
if (ret != GST_FLOW_OK) if (ret != GST_FLOW_OK)
goto done; goto done;
if (GST_BUFFER_SIZE (outbuf) < fsize) if (GST_BUFFER_SIZE (outbuf) < fsize) {
goto eos; gst_buffer_unref (outbuf);
ret = GST_FLOW_UNEXPECTED;
}
} }
parse->priv->offset += fsize; parse->priv->offset += fsize;
@ -2172,6 +2159,43 @@ gst_base_parse_loop (GstPad * pad)
if (skip > 0) if (skip > 0)
parse->priv->offset += skip; 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) {
if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_ts)) {
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 */ /* This always unrefs the outbuf, even if error occurs */
ret = gst_base_parse_handle_and_push_buffer (parse, klass, outbuf); ret = gst_base_parse_handle_and_push_buffer (parse, klass, outbuf);