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Code Issues 1 Projects Releases Wiki Activity

pngdec: various cleanups.

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Make some code more readable.
Fix a leak when pull range returns a shot buffer.
Push EOS after posting the error.
This commit is contained in:
Wim Taymans 2009-03-10 11:01:16 +01:00
parent 72a9b89b50
commit 18571b9e4f
1 changed files with 44 additions and 21 deletions
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65
ext/libpng/gstpngdec.c
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@ -246,15 +246,17 @@ buffer_clip (GstPngDec * dec, GstBuffer * buffer)
gboolean res = TRUE;
gint64 cstart, cstop;
if ((!GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (buffer))) ||
(!GST_CLOCK_TIME_IS_VALID (GST_BUFFER_DURATION (buffer))) ||
(dec->segment.format != GST_FORMAT_TIME))
goto beach;
cstart = GST_BUFFER_TIMESTAMP (buffer);
cstop = GST_BUFFER_DURATION (buffer);
if ((res = gst_segment_clip (&dec->segment, GST_FORMAT_TIME,
GST_BUFFER_TIMESTAMP (buffer),
GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer),
&cstart, &cstop))) {
cstart, cstart + cstop, &cstart, &cstop))) {
GST_BUFFER_TIMESTAMP (buffer) = cstart;
GST_BUFFER_DURATION (buffer) = cstop - cstart;
}
@ -301,6 +303,7 @@ user_read_data (png_structp png_ptr, png_bytep data, png_size_t length)
GstPngDec *pngdec;
GstBuffer *buffer;
GstFlowReturn ret = GST_FLOW_OK;
guint size;
pngdec = GST_PNGDEC (png_ptr->io_ptr);
@ -308,10 +311,15 @@ user_read_data (png_structp png_ptr, png_bytep data, png_size_t length)
pngdec->offset);
ret = gst_pad_pull_range (pngdec->sinkpad, pngdec->offset, length, &buffer);
if ((ret != GST_FLOW_OK) || (GST_BUFFER_SIZE (buffer) != length))
if (ret != GST_FLOW_OK)
goto pause;
memcpy (data, GST_BUFFER_DATA (buffer), GST_BUFFER_SIZE (buffer));
size = GST_BUFFER_SIZE (buffer);
if (size != length)
goto short_buffer;
memcpy (data, GST_BUFFER_DATA (buffer), size);
gst_buffer_unref (buffer);
@ -319,14 +327,28 @@ user_read_data (png_structp png_ptr, png_bytep data, png_size_t length)
return;
/* ERRORS */
pause:
GST_INFO_OBJECT (pngdec, "pausing task, reason %s", gst_flow_get_name (ret));
gst_pad_pause_task (pngdec->sinkpad);
if (GST_FLOW_IS_FATAL (ret) || ret == GST_FLOW_NOT_LINKED) {
gst_pad_push_event (pngdec->srcpad, gst_event_new_eos ());
{
GST_INFO_OBJECT (pngdec, "pausing task, reason %s",
gst_flow_get_name (ret));
gst_pad_pause_task (pngdec->sinkpad);
if (GST_FLOW_IS_FATAL (ret) || ret == GST_FLOW_NOT_LINKED) {
GST_ELEMENT_ERROR (pngdec, STREAM, FAILED,
(_("Internal data stream error.")),
("stream stopped, reason %s", gst_flow_get_name (ret)));
gst_pad_push_event (pngdec->srcpad, gst_event_new_eos ());
}
return;
}
short_buffer:
{
gst_buffer_unref (buffer);
GST_ELEMENT_ERROR (pngdec, STREAM, FAILED,
(_("Internal data stream error.")),
("stream stopped, reason %s", gst_flow_get_name (ret)));
("Read %u, needed %u bytes", size, length));
ret = GST_FLOW_ERROR;
goto pause;
}
}
@ -480,9 +502,8 @@ gst_pngdec_task (GstPad * pad)
ret =
gst_pad_alloc_buffer_and_set_caps (pngdec->srcpad, GST_BUFFER_OFFSET_NONE,
buffer_size, GST_PAD_CAPS (pngdec->srcpad), &buffer);
if (ret != GST_FLOW_OK) {
if (ret != GST_FLOW_OK)
goto pause;
}
rows = (png_bytep *) g_malloc (sizeof (png_bytep) * pngdec->height);
@ -499,9 +520,8 @@ gst_pngdec_task (GstPad * pad)
/* Push the raw RGB frame */
ret = gst_pad_push (pngdec->srcpad, buffer);
if (ret != GST_FLOW_OK) {
if (ret != GST_FLOW_OK)
goto pause;
}
/* And we are done */
gst_pad_pause_task (pngdec->sinkpad);
@ -509,13 +529,16 @@ gst_pngdec_task (GstPad * pad)
return;
pause:
GST_INFO_OBJECT (pngdec, "pausing task, reason %s", gst_flow_get_name (ret));
gst_pad_pause_task (pngdec->sinkpad);
if (GST_FLOW_IS_FATAL (ret) || ret == GST_FLOW_NOT_LINKED) {
GST_ELEMENT_ERROR (pngdec, STREAM, FAILED,
(_("Internal data stream error.")),
("stream stopped, reason %s", gst_flow_get_name (ret)));
gst_pad_push_event (pngdec->srcpad, gst_event_new_eos ());
{
GST_INFO_OBJECT (pngdec, "pausing task, reason %s",
gst_flow_get_name (ret));
gst_pad_pause_task (pngdec->sinkpad);
if (GST_FLOW_IS_FATAL (ret) || ret == GST_FLOW_NOT_LINKED) {
GST_ELEMENT_ERROR (pngdec, STREAM, FAILED,
(_("Internal data stream error.")),
("stream stopped, reason %s", gst_flow_get_name (ret)));
gst_pad_push_event (pngdec->srcpad, gst_event_new_eos ());
}
}
}