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ext/libpng/gstpngdec.*: Handle more than one frame if the content is framed, like with png-in-quicktime (#331917).

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Original commit message from CVS:
* ext/libpng/gstpngdec.c: (gst_pngdec_init),
(user_endrow_callback), (user_end_callback),
(gst_pngdec_caps_create_and_set), (gst_pngdec_chain),
(gst_pngdec_sink_setcaps), (gst_pngdec_sink_event),
(gst_pngdec_libpng_clear), (gst_pngdec_change_state):
* ext/libpng/gstpngdec.h:
Handle more than one frame if the content is framed,
like with png-in-quicktime (#331917).
This commit is contained in:
Tim-Philipp Müller 2006-04-11 09:35:45 +00:00
parent 4ebda6356b
commit 6dccffbfd0
3 changed files with 110 additions and 12 deletions
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11
ChangeLog
View file

@ -1,3 +1,14 @@
2006-04-11 Tim-Philipp Müller <tim at centricular dot net>
* ext/libpng/gstpngdec.c: (gst_pngdec_init),
(user_endrow_callback), (user_end_callback),
(gst_pngdec_caps_create_and_set), (gst_pngdec_chain),
(gst_pngdec_sink_setcaps), (gst_pngdec_sink_event),
(gst_pngdec_libpng_clear), (gst_pngdec_change_state):
* ext/libpng/gstpngdec.h:
Handle more than one frame if the content is framed,
like with png-in-quicktime (#331917).
2006-04-10 Thomas Vander Stichele <thomas at apestaart dot org>
* sys/oss/Makefile.am:

104
ext/libpng/gstpngdec.c
View file

@ -53,6 +53,7 @@ static GstFlowReturn gst_pngdec_caps_create_and_set (GstPngDec * pngdec);
static void gst_pngdec_task (GstPad * pad);
static GstFlowReturn gst_pngdec_chain (GstPad * pad, GstBuffer * buffer);
static gboolean gst_pngdec_sink_event (GstPad * pad, GstEvent * event);
static gboolean gst_pngdec_sink_setcaps (GstPad * pad, GstCaps * caps);
static GstElementClass *parent_class = NULL;
@ -122,7 +123,6 @@ gst_pngdec_class_init (GstPngDecClass * klass)
GST_DEBUG_CATEGORY_INIT (pngdec_debug, "pngdec", 0, "PNG image decoder");
}
static void
gst_pngdec_init (GstPngDec * pngdec)
{
@ -135,6 +135,7 @@ gst_pngdec_init (GstPngDec * pngdec)
gst_pngdec_sink_activate_pull);
gst_pad_set_chain_function (pngdec->sinkpad, gst_pngdec_chain);
gst_pad_set_event_function (pngdec->sinkpad, gst_pngdec_sink_event);
gst_pad_set_setcaps_function (pngdec->sinkpad, gst_pngdec_sink_setcaps);
gst_element_add_pad (GST_ELEMENT (pngdec), pngdec->sinkpad);
pngdec->srcpad =
@ -142,8 +143,6 @@ gst_pngdec_init (GstPngDec * pngdec)
gst_pad_use_fixed_caps (pngdec->srcpad);
gst_element_add_pad (GST_ELEMENT (pngdec), pngdec->srcpad);
/* gst_pad_set_chain_function (pngdec->sinkpad, gst_pngdec_chain); */
pngdec->buffer_out = NULL;
pngdec->png = NULL;
pngdec->info = NULL;
@ -156,6 +155,9 @@ gst_pngdec_init (GstPngDec * pngdec)
pngdec->bpp = -1;
pngdec->fps_n = 0;
pngdec->fps_d = 1;
pngdec->in_timestamp = GST_CLOCK_TIME_NONE;
pngdec->in_duration = GST_CLOCK_TIME_NONE;
}
static void
@ -235,11 +237,31 @@ user_end_callback (png_structp png_ptr, png_infop info)
pngdec = GST_PNGDEC (png_ptr->io_ptr);
GST_LOG ("and we are done reading this image, pushing it and setting eos");
GST_LOG_OBJECT (pngdec, "and we are done reading this image");
if (GST_CLOCK_TIME_IS_VALID (pngdec->in_timestamp))
GST_BUFFER_TIMESTAMP (pngdec->buffer_out) = pngdec->in_timestamp;
if (GST_CLOCK_TIME_IS_VALID (pngdec->in_duration))
GST_BUFFER_DURATION (pngdec->buffer_out) = pngdec->in_duration;
/* Push our buffer and then EOS if needed */
GST_LOG_OBJECT (pngdec, "pushing buffer with ts=%" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (pngdec->buffer_out)));
/* Push our buffer and then EOS */
pngdec->ret = gst_pad_push (pngdec->srcpad, pngdec->buffer_out);
pngdec->ret = gst_pad_push_event (pngdec->srcpad, gst_event_new_eos ());
pngdec->buffer_out = NULL;
if (pngdec->framed) {
/* Reset ourselves for the next frame */
gst_pngdec_libpng_clear (pngdec);
gst_pngdec_libpng_init (pngdec);
GST_LOG_OBJECT (pngdec, "setting up callbacks for next frame");
png_set_progressive_read_fn (pngdec->png, pngdec,
user_info_callback, user_endrow_callback, user_end_callback);
} else {
GST_LOG_OBJECT (pngdec, "sending EOS");
pngdec->ret = gst_pad_push_event (pngdec->srcpad, gst_event_new_eos ());
}
}
static void
@ -282,7 +304,6 @@ gst_pngdec_caps_create_and_set (GstPngDec * pngdec)
GstFlowReturn ret = GST_FLOW_OK;
GstCaps *caps = NULL, *res = NULL;
GstPadTemplate *templ = NULL;
GstEvent *new_seg = NULL;
gint bpc = 0, color_type;
png_uint_32 width, height;
@ -374,9 +395,10 @@ gst_pngdec_caps_create_and_set (GstPngDec * pngdec)
gst_caps_unref (res);
/* Push a newsegment event */
new_seg = gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME, 0, -1, 0);
if (GST_IS_EVENT (new_seg)) {
gst_pad_push_event (pngdec->srcpad, new_seg);
if (pngdec->need_newsegment) {
gst_pad_push_event (pngdec->srcpad,
gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME, 0, -1, 0));
pngdec->need_newsegment = FALSE;
}
beach:
@ -467,6 +489,8 @@ gst_pngdec_chain (GstPad * pad, GstBuffer * buffer)
pngdec = GST_PNGDEC (GST_OBJECT_PARENT (pad));
GST_LOG_OBJECT (pngdec, "Got buffer, size=%u", GST_BUFFER_SIZE (buffer));
if (!pngdec->setup) {
GST_LOG ("we are not configured yet");
ret = GST_FLOW_WRONG_STATE;
@ -481,10 +505,14 @@ gst_pngdec_chain (GstPad * pad, GstBuffer * buffer)
/* Let libpng come back here on error */
if (setjmp (png_jmpbuf (pngdec->png))) {
GST_WARNING ("error during decoding");
ret = GST_FLOW_ERROR;
goto beach;
}
pngdec->in_timestamp = GST_BUFFER_TIMESTAMP (buffer);
pngdec->in_duration = GST_BUFFER_DURATION (buffer);
/* Progressive loading of the PNG image */
png_process_data (pngdec->png, pngdec->info, GST_BUFFER_DATA (buffer),
GST_BUFFER_SIZE (buffer));
@ -496,19 +524,66 @@ beach:
return ret;
}
static gboolean
gst_pngdec_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstStructure *s;
GstPngDec *pngdec;
gint num, denom;
pngdec = GST_PNGDEC (gst_pad_get_parent (pad));
s = gst_caps_get_structure (caps, 0);
if (gst_structure_get_fraction (s, "framerate", &num, &denom)) {
GST_DEBUG_OBJECT (pngdec, "framed input");
pngdec->framed = TRUE;
pngdec->fps_n = num;
pngdec->fps_d = denom;
} else {
pngdec->framed = FALSE;
pngdec->fps_n = 0;
pngdec->fps_d = 1;
}
gst_object_unref (pngdec);
return TRUE;
}
static gboolean
gst_pngdec_sink_event (GstPad * pad, GstEvent * event)
{
GstPngDec *pngdec;
gboolean res;
pngdec = GST_PNGDEC (GST_OBJECT_PARENT (pad));
pngdec = GST_PNGDEC (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NEWSEGMENT:{
GstFormat fmt;
gst_event_parse_new_segment (event, NULL, NULL, &fmt, NULL, NULL, NULL);
GST_LOG_OBJECT (pngdec, "NEWSEGMENT (%s)", gst_format_get_name (fmt));
if (fmt == GST_FORMAT_TIME) {
pngdec->need_newsegment = FALSE;
res = gst_pad_event_default (pad, event);
} else {
gst_event_unref (event);
res = TRUE;
}
break;
}
case GST_EVENT_EOS:
GST_LOG_OBJECT (pngdec, "EOS");
gst_pngdec_libpng_clear (pngdec);
res = gst_pad_event_default (pad, event);
break;
default:
return gst_pad_event_default (pad, event);
res = gst_pad_event_default (pad, event);
break;
}
gst_object_unref (pngdec);
return res;
}
@ -544,6 +619,9 @@ gst_pngdec_libpng_clear (GstPngDec * pngdec)
pngdec->setup = FALSE;
pngdec->in_timestamp = GST_CLOCK_TIME_NONE;
pngdec->in_duration = GST_CLOCK_TIME_NONE;
return TRUE;
}
@ -599,6 +677,8 @@ gst_pngdec_change_state (GstElement * element, GstStateChange transition)
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_pngdec_libpng_init (pngdec);
pngdec->need_newsegment = TRUE;
pngdec->framed = FALSE;
break;
default:
break;

7
ext/libpng/gstpngdec.h
View file

@ -41,6 +41,8 @@ struct _GstPngDec
GstPad *sinkpad, *srcpad;
gboolean need_newsegment;
/* Progressive */
GstBuffer *buffer_out;
GstFlowReturn ret;
@ -60,6 +62,11 @@ struct _GstPngDec
gint color_type;
gint fps_n;
gint fps_d;
/* Chain */
gboolean framed;
GstClockTime in_timestamp;
GstClockTime in_duration;
};
struct _GstPngDecClass