diff options
Diffstat (limited to 'ext/libpng')
-rw-r--r-- | ext/libpng/gstpngdec.c | 104 | ||||
-rw-r--r-- | ext/libpng/gstpngdec.h | 7 |
2 files changed, 99 insertions, 12 deletions
diff --git a/ext/libpng/gstpngdec.c b/ext/libpng/gstpngdec.c index a6da699e..6fbca483 100644 --- a/ext/libpng/gstpngdec.c +++ b/ext/libpng/gstpngdec.c @@ -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)); @@ -497,18 +525,65 @@ beach: } 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; diff --git a/ext/libpng/gstpngdec.h b/ext/libpng/gstpngdec.h index 9930b83a..94fc80f1 100644 --- a/ext/libpng/gstpngdec.h +++ b/ext/libpng/gstpngdec.h @@ -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 |