diff options
Diffstat (limited to 'ext/pango/gsttextoverlay.c')
| -rw-r--r-- | ext/pango/gsttextoverlay.c | 901 |
1 files changed, 448 insertions, 453 deletions
diff --git a/ext/pango/gsttextoverlay.c b/ext/pango/gsttextoverlay.c index 4264e813..d0b40294 100644 --- a/ext/pango/gsttextoverlay.c +++ b/ext/pango/gsttextoverlay.c @@ -11,205 +11,196 @@ /*#include "SDL_blit.h"*/ static GstElementDetails textoverlay_details = { - "Text Overlay", - "Filter/Editor/Video", - "Adds text strings on top of a video buffer", - "Gustavo J. A. M. Carneiro <gjc@inescporto.pt>" + "Text Overlay", + "Filter/Editor/Video", + "Adds text strings on top of a video buffer", + "Gustavo J. A. M. Carneiro <gjc@inescporto.pt>" }; -enum { - ARG_0, - ARG_TEXT, - ARG_VALIGN, - ARG_HALIGN, - ARG_X0, - ARG_Y0, - ARG_FONT_DESC, +enum +{ + ARG_0, + ARG_TEXT, + ARG_VALIGN, + ARG_HALIGN, + ARG_X0, + ARG_Y0, + ARG_FONT_DESC, }; static GstStaticPadTemplate textoverlay_src_template_factory = -GST_STATIC_PAD_TEMPLATE ( - "src", +GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/x-raw-yuv, " - "format = (fourcc) I420, " - "width = (int) [ 1, MAX ], " - "height = (int) [ 1, MAX ]") -); + "format = (fourcc) I420, " + "width = (int) [ 1, MAX ], " "height = (int) [ 1, MAX ]") + ); static GstStaticPadTemplate video_sink_template_factory = -GST_STATIC_PAD_TEMPLATE ( - "video_sink", +GST_STATIC_PAD_TEMPLATE ("video_sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/x-raw-yuv, " - "format = (fourcc) I420, " - "width = (int) [ 1, MAX ], " - "height = (int) [ 1, MAX ]") -); + "format = (fourcc) I420, " + "width = (int) [ 1, MAX ], " "height = (int) [ 1, MAX ]") + ); static GstStaticPadTemplate text_sink_template_factory = -GST_STATIC_PAD_TEMPLATE ( - "text_sink", + GST_STATIC_PAD_TEMPLATE ("text_sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("text/x-pango-markup; text/plain") -); - -static void gst_textoverlay_base_init (gpointer g_class); -static void gst_textoverlay_class_init(GstTextOverlayClass *klass); -static void gst_textoverlay_init(GstTextOverlay *overlay); -static void gst_textoverlay_set_property(GObject *object, - guint prop_id, - const GValue *value, - GParamSpec *pspec); -static void gst_textoverlay_get_property(GObject *object, - guint prop_id, - GValue *value, - GParamSpec *pspec); -static GstElementStateReturn gst_textoverlay_change_state(GstElement *element); -static void gst_textoverlay_finalize(GObject *object); + ); + +static void gst_textoverlay_base_init (gpointer g_class); +static void gst_textoverlay_class_init (GstTextOverlayClass * klass); +static void gst_textoverlay_init (GstTextOverlay * overlay); +static void gst_textoverlay_set_property (GObject * object, + guint prop_id, const GValue * value, GParamSpec * pspec); +static void gst_textoverlay_get_property (GObject * object, + guint prop_id, GValue * value, GParamSpec * pspec); +static GstElementStateReturn gst_textoverlay_change_state (GstElement * + element); +static void gst_textoverlay_finalize (GObject * object); static GstElementClass *parent_class = NULL; + /*static guint gst_textoverlay_signals[LAST_SIGNAL] = { 0 }; */ GType -gst_textoverlay_get_type(void) +gst_textoverlay_get_type (void) { - static GType textoverlay_type = 0; - - if (!textoverlay_type) { - static const GTypeInfo textoverlay_info = { - sizeof(GstTextOverlayClass), - gst_textoverlay_base_init, - NULL, - (GClassInitFunc)gst_textoverlay_class_init, - NULL, - NULL, - sizeof(GstTextOverlay), - 0, - (GInstanceInitFunc)gst_textoverlay_init, - }; - textoverlay_type = g_type_register_static(GST_TYPE_ELEMENT, "GstTextOverlay", - &textoverlay_info, 0); - } - return textoverlay_type; + static GType textoverlay_type = 0; + + if (!textoverlay_type) { + static const GTypeInfo textoverlay_info = { + sizeof (GstTextOverlayClass), + gst_textoverlay_base_init, + NULL, + (GClassInitFunc) gst_textoverlay_class_init, + NULL, + NULL, + sizeof (GstTextOverlay), + 0, + (GInstanceInitFunc) gst_textoverlay_init, + }; + textoverlay_type = + g_type_register_static (GST_TYPE_ELEMENT, "GstTextOverlay", + &textoverlay_info, 0); + } + return textoverlay_type; } static void gst_textoverlay_base_init (gpointer g_class) { - GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); + GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); - gst_element_class_add_pad_template (element_class, - gst_static_pad_template_get (&textoverlay_src_template_factory)); - gst_element_class_add_pad_template (element_class, - gst_static_pad_template_get (&video_sink_template_factory)); - gst_element_class_add_pad_template (element_class, - gst_static_pad_template_get (&text_sink_template_factory)); + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&textoverlay_src_template_factory)); + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&video_sink_template_factory)); + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&text_sink_template_factory)); - gst_element_class_set_details (element_class, &textoverlay_details); + gst_element_class_set_details (element_class, &textoverlay_details); } static void -gst_textoverlay_class_init(GstTextOverlayClass *klass) +gst_textoverlay_class_init (GstTextOverlayClass * klass) { - GObjectClass *gobject_class; - GstElementClass *gstelement_class; - - gobject_class = (GObjectClass*)klass; - gstelement_class = (GstElementClass*)klass; - - parent_class = g_type_class_peek_parent(klass); - - gobject_class->finalize = gst_textoverlay_finalize; - gobject_class->set_property = gst_textoverlay_set_property; - gobject_class->get_property = gst_textoverlay_get_property; - - gstelement_class->change_state = gst_textoverlay_change_state; - klass->pango_context = pango_ft2_get_context(72, 72); - g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_TEXT, - g_param_spec_string("text", "text", - "Text to be display," - " in pango markup format.", - "", G_PARAM_WRITABLE)); - g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_VALIGN, - g_param_spec_string("valign", "vertical alignment", - "Vertical alignment of the text. " - "Can be either 'baseline', 'bottom', or 'top'", - "baseline", G_PARAM_WRITABLE)); - g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HALIGN, - g_param_spec_string("halign", "horizontal alignment", - "Horizontal alignment of the text. " - "Can be either 'left', 'right', or 'center'", - "center", G_PARAM_WRITABLE)); - g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_X0, - g_param_spec_int("x0", "X position", - "Initial X position." - " Horizontal aligment takes this point" - " as reference.", - G_MININT, G_MAXINT, 0, G_PARAM_WRITABLE)); - g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_Y0, - g_param_spec_int("y0", "Y position", - "Initial Y position." - " Vertical aligment takes this point" - " as reference.", - G_MININT, G_MAXINT, 0, G_PARAM_WRITABLE)); - g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FONT_DESC, - g_param_spec_string("font-desc", "font description", - "Pango font description of font " - "to be used for rendering. " - "See documentation of " - "pango_font_description_from_string" - " for syntax.", - "", G_PARAM_WRITABLE)); + GObjectClass *gobject_class; + GstElementClass *gstelement_class; + + gobject_class = (GObjectClass *) klass; + gstelement_class = (GstElementClass *) klass; + + parent_class = g_type_class_peek_parent (klass); + + gobject_class->finalize = gst_textoverlay_finalize; + gobject_class->set_property = gst_textoverlay_set_property; + gobject_class->get_property = gst_textoverlay_get_property; + + gstelement_class->change_state = gst_textoverlay_change_state; + klass->pango_context = pango_ft2_get_context (72, 72); + g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TEXT, + g_param_spec_string ("text", "text", + "Text to be display," + " in pango markup format.", "", G_PARAM_WRITABLE)); + g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_VALIGN, + g_param_spec_string ("valign", "vertical alignment", + "Vertical alignment of the text. " + "Can be either 'baseline', 'bottom', or 'top'", + "baseline", G_PARAM_WRITABLE)); + g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_HALIGN, + g_param_spec_string ("halign", "horizontal alignment", + "Horizontal alignment of the text. " + "Can be either 'left', 'right', or 'center'", + "center", G_PARAM_WRITABLE)); + g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_X0, + g_param_spec_int ("x0", "X position", + "Initial X position." + " Horizontal aligment takes this point" + " as reference.", G_MININT, G_MAXINT, 0, G_PARAM_WRITABLE)); + g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_Y0, + g_param_spec_int ("y0", "Y position", + "Initial Y position." + " Vertical aligment takes this point" + " as reference.", G_MININT, G_MAXINT, 0, G_PARAM_WRITABLE)); + g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FONT_DESC, + g_param_spec_string ("font-desc", "font description", + "Pango font description of font " + "to be used for rendering. " + "See documentation of " + "pango_font_description_from_string" + " for syntax.", "", G_PARAM_WRITABLE)); } static void -resize_bitmap(GstTextOverlay *overlay, int width, int height) +resize_bitmap (GstTextOverlay * overlay, int width, int height) { - FT_Bitmap *bitmap = &overlay->bitmap; - int pitch = (width|3) + 1; - int size = pitch*height; - - /* no need to keep reallocating; just keep the maximum size so far */ - if (size <= overlay->bitmap_buffer_size) { - bitmap->rows = height; - bitmap->width = width; - bitmap->pitch = pitch; - memset(bitmap->buffer, 0, overlay->bitmap_buffer_size); - return; - } - if (!bitmap->buffer) { - /* initialize */ - bitmap->pixel_mode = ft_pixel_mode_grays; - bitmap->num_grays = 256; - } - if (bitmap->buffer) - bitmap->buffer = g_realloc(bitmap->buffer, size); - else - bitmap->buffer = g_malloc(size); + FT_Bitmap *bitmap = &overlay->bitmap; + int pitch = (width | 3) + 1; + int size = pitch * height; + + /* no need to keep reallocating; just keep the maximum size so far */ + if (size <= overlay->bitmap_buffer_size) { bitmap->rows = height; bitmap->width = width; bitmap->pitch = pitch; - memset(bitmap->buffer, 0, size); - overlay->bitmap_buffer_size = size; + memset (bitmap->buffer, 0, overlay->bitmap_buffer_size); + return; + } + if (!bitmap->buffer) { + /* initialize */ + bitmap->pixel_mode = ft_pixel_mode_grays; + bitmap->num_grays = 256; + } + if (bitmap->buffer) + bitmap->buffer = g_realloc (bitmap->buffer, size); + else + bitmap->buffer = g_malloc (size); + bitmap->rows = height; + bitmap->width = width; + bitmap->pitch = pitch; + memset (bitmap->buffer, 0, size); + overlay->bitmap_buffer_size = size; } static void -render_text(GstTextOverlay *overlay) +render_text (GstTextOverlay * overlay) { - PangoRectangle ink_rect, logical_rect; + PangoRectangle ink_rect, logical_rect; - pango_layout_get_pixel_extents(overlay->layout, &ink_rect, &logical_rect); - resize_bitmap(overlay, ink_rect.width, ink_rect.height + ink_rect.y); - pango_ft2_render_layout(&overlay->bitmap, overlay->layout, 0, 0); - overlay->baseline_y = ink_rect.y; + pango_layout_get_pixel_extents (overlay->layout, &ink_rect, &logical_rect); + resize_bitmap (overlay, ink_rect.width, ink_rect.height + ink_rect.y); + pango_ft2_render_layout (&overlay->bitmap, overlay->layout, 0, 0); + overlay->baseline_y = ink_rect.y; } /* static GstPadLinkReturn */ @@ -220,154 +211,157 @@ render_text(GstTextOverlay *overlay) static GstPadLinkReturn -gst_textoverlay_video_sinkconnect(GstPad *pad, const GstCaps *caps) +gst_textoverlay_video_sinkconnect (GstPad * pad, const GstCaps * caps) { - GstTextOverlay *overlay; - GstStructure *structure; + GstTextOverlay *overlay; + GstStructure *structure; - overlay = GST_TEXTOVERLAY(gst_pad_get_parent(pad)); + overlay = GST_TEXTOVERLAY (gst_pad_get_parent (pad)); - structure = gst_caps_get_structure (caps, 0); - overlay->width = overlay->height = 0; - gst_structure_get_int (structure, "width", &overlay->width); - gst_structure_get_int (structure, "height", &overlay->height); + structure = gst_caps_get_structure (caps, 0); + overlay->width = overlay->height = 0; + gst_structure_get_int (structure, "width", &overlay->width); + gst_structure_get_int (structure, "height", &overlay->height); - return gst_pad_try_set_caps(overlay->srcpad, caps); + return gst_pad_try_set_caps (overlay->srcpad, caps); } static void -gst_text_overlay_blit_yuv420(GstTextOverlay *overlay, FT_Bitmap *bitmap, - guchar *pixbuf, int x0, int y0) +gst_text_overlay_blit_yuv420 (GstTextOverlay * overlay, FT_Bitmap * bitmap, + guchar * pixbuf, int x0, int y0) { - int y; /* text bitmap coordinates */ - int x1, y1; /* video buffer coordinates */ - int rowinc, bit_rowinc, uv_rowinc; - guchar *p, *bitp, *u_p; - int video_width = overlay->width, video_height = overlay->height; - int bitmap_x0 = x0 < 1? -(x0 - 1) : 1; /* 1 pixel border */ - int bitmap_y0 = y0 < 1? -(y0 - 1) : 1; /* 1 pixel border */ - int bitmap_width = bitmap->width - bitmap_x0; - int bitmap_height = bitmap->rows - bitmap_y0; - int u_plane_size; - int skip_y, skip_x; - guchar v; - - if (x0 + bitmap_x0 + bitmap_width > video_width - 1) /* 1 pixel border */ - bitmap_width -= x0 + bitmap_x0 + bitmap_width - video_width + 1; - if (y0 + bitmap_y0 + bitmap_height > video_height - 1) /* 1 pixel border */ - bitmap_height -= y0 + bitmap_y0 + bitmap_height - video_height + 1; - - rowinc = video_width - bitmap_width; - uv_rowinc = video_width / 2 - bitmap_width / 2; - bit_rowinc = bitmap->pitch - bitmap_width; - u_plane_size = (video_width / 2)*(video_height / 2); - - y1 = y0 + bitmap_y0; - x1 = x0 + bitmap_x0; - p = pixbuf + video_width*y1 + x1; - bitp = bitmap->buffer + bitmap->pitch*bitmap_y0 + bitmap_x0; - for (y = bitmap_y0; y < bitmap_height; y++){ - int n; - for(n=bitmap_width; n>0; --n){ - v = *bitp; - if (v) { - p[-1] = CLAMP(p[-1] - v, 0, 255); - p[ 1] = CLAMP(p[ 1] - v, 0, 255); - p[-video_width] = CLAMP(p[-video_width] - v, 0, 255); - p[ video_width] = CLAMP(p[ video_width] - v, 0, 255); - } - p++; - bitp++; + int y; /* text bitmap coordinates */ + int x1, y1; /* video buffer coordinates */ + int rowinc, bit_rowinc, uv_rowinc; + guchar *p, *bitp, *u_p; + int video_width = overlay->width, video_height = overlay->height; + int bitmap_x0 = x0 < 1 ? -(x0 - 1) : 1; /* 1 pixel border */ + int bitmap_y0 = y0 < 1 ? -(y0 - 1) : 1; /* 1 pixel border */ + int bitmap_width = bitmap->width - bitmap_x0; + int bitmap_height = bitmap->rows - bitmap_y0; + int u_plane_size; + int skip_y, skip_x; + guchar v; + + if (x0 + bitmap_x0 + bitmap_width > video_width - 1) /* 1 pixel border */ + bitmap_width -= x0 + bitmap_x0 + bitmap_width - video_width + 1; + if (y0 + bitmap_y0 + bitmap_height > video_height - 1) /* 1 pixel border */ + bitmap_height -= y0 + bitmap_y0 + bitmap_height - video_height + 1; + + rowinc = video_width - bitmap_width; + uv_rowinc = video_width / 2 - bitmap_width / 2; + bit_rowinc = bitmap->pitch - bitmap_width; + u_plane_size = (video_width / 2) * (video_height / 2); + + y1 = y0 + bitmap_y0; + x1 = x0 + bitmap_x0; + p = pixbuf + video_width * y1 + x1; + bitp = bitmap->buffer + bitmap->pitch * bitmap_y0 + bitmap_x0; + for (y = bitmap_y0; y < bitmap_height; y++) { + int n; + + for (n = bitmap_width; n > 0; --n) { + v = *bitp; + if (v) { + p[-1] = CLAMP (p[-1] - v, 0, 255); + p[1] = CLAMP (p[1] - v, 0, 255); + p[-video_width] = CLAMP (p[-video_width] - v, 0, 255); + p[video_width] = CLAMP (p[video_width] - v, 0, 255); } - p += rowinc; - bitp += bit_rowinc; + p++; + bitp++; } + p += rowinc; + bitp += bit_rowinc; + } + + y = bitmap_y0; + y1 = y0 + bitmap_y0; + x1 = x0 + bitmap_x0; + bitp = bitmap->buffer + bitmap->pitch * bitmap_y0 + bitmap_x0; + p = pixbuf + video_width * y1 + x1; + u_p = + pixbuf + video_width * video_height + (video_width >> 1) * (y1 >> 1) + + (x1 >> 1); + skip_y = 0; + skip_x = 0; + + for (; y < bitmap_height; y++) { + int n; - y = bitmap_y0; - y1 = y0 + bitmap_y0; x1 = x0 + bitmap_x0; - bitp = bitmap->buffer + bitmap->pitch*bitmap_y0 + bitmap_x0; - p = pixbuf + video_width*y1 + x1; - u_p = pixbuf + video_width*video_height + (video_width >> 1)*(y1 >> 1) + (x1 >> 1); - skip_y = 0; skip_x = 0; - - for ( ; y < bitmap_height; y++){ - int n; - x1 = x0 + bitmap_x0; - skip_x = 0; - for(n = bitmap_width; n>0; --n){ - v = *bitp; - if (v) { - *p = v; - if (!skip_y) { - u_p[0] = u_p[u_plane_size] = 0x80; - } - } + for (n = bitmap_width; n > 0; --n) { + v = *bitp; + if (v) { + *p = v; if (!skip_y) { - skip_x = !skip_x; - if (!skip_x) u_p++; + u_p[0] = u_p[u_plane_size] = 0x80; } - p++; - bitp++; } - /*if (!skip_x && !skip_y) u_p--; */ - p += rowinc; - bitp += bit_rowinc; - skip_y = !skip_y; - u_p += skip_y? uv_rowinc : 0; + if (!skip_y) { + skip_x = !skip_x; + if (!skip_x) + u_p++; + } + p++; + bitp++; } + /*if (!skip_x && !skip_y) u_p--; */ + p += rowinc; + bitp += bit_rowinc; + skip_y = !skip_y; + u_p += skip_y ? uv_rowinc : 0; + } } static void -gst_textoverlay_video_chain(GstPad *pad, GstData *_data) +gst_textoverlay_video_chain (GstPad * pad, GstData * _data) { - GstBuffer *buf = GST_BUFFER (_data); - GstTextOverlay *overlay; - guchar *pixbuf; - gint x0, y0; - - g_return_if_fail(pad != NULL); - g_return_if_fail(GST_IS_PAD(pad)); - g_return_if_fail(buf != NULL); - overlay = GST_TEXTOVERLAY(gst_pad_get_parent(pad)); - g_return_if_fail(overlay != NULL); - g_return_if_fail(GST_IS_TEXTOVERLAY(overlay)); - - pixbuf = GST_BUFFER_DATA(buf); - - x0 = overlay->x0; - y0 = overlay->y0; - switch (overlay->valign) - { + GstBuffer *buf = GST_BUFFER (_data); + GstTextOverlay *overlay; + guchar *pixbuf; + gint x0, y0; + + g_return_if_fail (pad != NULL); + g_return_if_fail (GST_IS_PAD (pad)); + g_return_if_fail (buf != NULL); + overlay = GST_TEXTOVERLAY (gst_pad_get_parent (pad)); + g_return_if_fail (overlay != NULL); + g_return_if_fail (GST_IS_TEXTOVERLAY (overlay)); + + pixbuf = GST_BUFFER_DATA (buf); + + x0 = overlay->x0; + y0 = overlay->y0; + switch (overlay->valign) { case GST_TEXT_OVERLAY_VALIGN_BOTTOM: - y0 += overlay->bitmap.rows; - break; + y0 += overlay->bitmap.rows; + break; case GST_TEXT_OVERLAY_VALIGN_BASELINE: - y0 -= (overlay->bitmap.rows - overlay->baseline_y); - break; + y0 -= (overlay->bitmap.rows - overlay->baseline_y); + break; case GST_TEXT_OVERLAY_VALIGN_TOP: - break; - } + break; + } - switch (overlay->halign) - { + switch (overlay->halign) { case GST_TEXT_OVERLAY_HALIGN_LEFT: - break; + break; case GST_TEXT_OVERLAY_HALIGN_RIGHT: - x0 -= overlay->bitmap.width; - break; + x0 -= overlay->bitmap.width; + break; case GST_TEXT_OVERLAY_HALIGN_CENTER: - x0 -= overlay->bitmap.width / 2; - break; - } + x0 -= overlay->bitmap.width / 2; + break; + } - if (overlay->bitmap.buffer) - gst_text_overlay_blit_yuv420(overlay, &overlay->bitmap, pixbuf, x0, y0); + if (overlay->bitmap.buffer) + gst_text_overlay_blit_yuv420 (overlay, &overlay->bitmap, pixbuf, x0, y0); - gst_pad_push(overlay->srcpad, GST_DATA (buf)); + gst_pad_push (overlay->srcpad, GST_DATA (buf)); } #define PAST_END(buffer, time) \ @@ -377,270 +371,271 @@ gst_textoverlay_video_chain(GstPad *pad, GstData *_data) < (time)) static void -gst_textoverlay_loop(GstElement *element) +gst_textoverlay_loop (GstElement * element) { - GstTextOverlay *overlay; - GstBuffer *video_frame; - guint64 now; - - g_return_if_fail(element != NULL); - g_return_if_fail(GST_IS_TEXTOVERLAY(element)); - overlay = GST_TEXTOVERLAY(element); - - video_frame = GST_BUFFER (gst_pad_pull(overlay->video_sinkpad)); - now = GST_BUFFER_TIMESTAMP(video_frame); - - /* - * This state machine has a bug that can't be resolved easily. - * (Needs a more complicated state machine.) Basically, if the - * text that came from a buffer from the sink pad is being - * displayed, and the default text is changed by set_parameter, - * we'll incorrectly display the default text. - * - * Otherwise, this is a pretty decent state machine that handles - * buffer timestamps and durations correctly. (I think) - */ - - while (overlay->next_buffer == NULL){ - GST_DEBUG("attempting to pull a buffer"); - - /* read all text buffers until we get one "in the future" */ - if(!GST_PAD_IS_USABLE(overlay->text_sinkpad)){ - break; - } - overlay->next_buffer = GST_BUFFER (gst_pad_pull(overlay->text_sinkpad)); - if (!overlay->next_buffer) - break; - - if (PAST_END(overlay->next_buffer, now)){ - gst_buffer_unref(overlay->next_buffer); - overlay->next_buffer = NULL; - } + GstTextOverlay *overlay; + GstBuffer *video_frame; + guint64 now; + + g_return_if_fail (element != NULL); + g_return_if_fail (GST_IS_TEXTOVERLAY (element)); + overlay = GST_TEXTOVERLAY (element); + + video_frame = GST_BUFFER (gst_pad_pull (overlay->video_sinkpad)); + now = GST_BUFFER_TIMESTAMP (video_frame); + + /* + * This state machine has a bug that can't be resolved easily. + * (Needs a more complicated state machine.) Basically, if the + * text that came from a buffer from the sink pad is being + * displayed, and the default text is changed by set_parameter, + * we'll incorrectly display the default text. + * + * Otherwise, this is a pretty decent state machine that handles + * buffer timestamps and durations correctly. (I think) + */ + + while (overlay->next_buffer == NULL) { + GST_DEBUG ("attempting to pull a buffer"); + + /* read all text buffers until we get one "in the future" */ + if (!GST_PAD_IS_USABLE (overlay->text_sinkpad)) { + break; } + overlay->next_buffer = GST_BUFFER (gst_pad_pull (overlay->text_sinkpad)); + if (!overlay->next_buffer) + break; - if (overlay->next_buffer && - (GST_BUFFER_TIMESTAMP(overlay->next_buffer) <= now || - GST_BUFFER_TIMESTAMP(overlay->next_buffer) == GST_CLOCK_TIME_NONE)){ - GST_DEBUG("using new buffer"); - - if (overlay->current_buffer){ - gst_buffer_unref (overlay->current_buffer); - } - overlay->current_buffer = overlay->next_buffer; + if (PAST_END (overlay->next_buffer, now)) { + gst_buffer_unref (overlay->next_buffer); overlay->next_buffer = NULL; + } + } - GST_DEBUG ( "rendering '%*s'", - GST_BUFFER_SIZE(overlay->current_buffer), - GST_BUFFER_DATA(overlay->current_buffer)); - pango_layout_set_markup(overlay->layout, - GST_BUFFER_DATA(overlay->current_buffer), - GST_BUFFER_SIZE(overlay->current_buffer)); - render_text(overlay); - overlay->need_render = FALSE; + if (overlay->next_buffer && + (GST_BUFFER_TIMESTAMP (overlay->next_buffer) <= now || + GST_BUFFER_TIMESTAMP (overlay->next_buffer) == GST_CLOCK_TIME_NONE)) { + GST_DEBUG ("using new buffer"); + + if (overlay->current_buffer) { + gst_buffer_unref (overlay->current_buffer); } + overlay->current_buffer = overlay->next_buffer; + overlay->next_buffer = NULL; - if (overlay->current_buffer && PAST_END(overlay->current_buffer, now)){ - GST_DEBUG("dropping old buffer"); + GST_DEBUG ("rendering '%*s'", + GST_BUFFER_SIZE (overlay->current_buffer), + GST_BUFFER_DATA (overlay->current_buffer)); + pango_layout_set_markup (overlay->layout, + GST_BUFFER_DATA (overlay->current_buffer), + GST_BUFFER_SIZE (overlay->current_buffer)); + render_text (overlay); + overlay->need_render = FALSE; + } - gst_buffer_unref(overlay->current_buffer); - overlay->current_buffer = NULL; + if (overlay->current_buffer && PAST_END (overlay->current_buffer, now)) { + GST_DEBUG ("dropping old buffer"); - overlay->need_render = TRUE; - } + gst_buffer_unref (overlay->current_buffer); + overlay->current_buffer = NULL; - if(overlay->need_render){ - GST_DEBUG ( "rendering '%s'", overlay->default_text); - pango_layout_set_markup(overlay->layout, - overlay->default_text, strlen(overlay->default_text)); - render_text(overlay); + overlay->need_render = TRUE; + } - overlay->need_render = FALSE; - } + if (overlay->need_render) { + GST_DEBUG ("rendering '%s'", overlay->default_text); + pango_layout_set_markup (overlay->layout, + overlay->default_text, strlen (overlay->default_text)); + render_text (overlay); + + overlay->need_render = FALSE; + } - gst_textoverlay_video_chain(overlay->srcpad, GST_DATA (video_frame)); + gst_textoverlay_video_chain (overlay->srcpad, GST_DATA (video_frame)); } static GstElementStateReturn -gst_textoverlay_change_state(GstElement *element) +gst_textoverlay_change_state (GstElement * element) { - GstTextOverlay *overlay; + GstTextOverlay *overlay; - overlay = GST_TEXTOVERLAY(element); + overlay = GST_TEXTOVERLAY (element); - switch (GST_STATE_TRANSITION(element)) - { + switch (GST_STATE_TRANSITION (element)) { case GST_STATE_PAUSED_TO_PLAYING: - break; + break; case GST_STATE_PLAYING_TO_PAUSED: - break; + break; case GST_STATE_PAUSED_TO_READY: - break; - } + break; + } - parent_class->change_state(element); + parent_class->change_state (element); - return GST_STATE_SUCCESS; + return GST_STATE_SUCCESS; } static void -gst_textoverlay_finalize(GObject *object) +gst_textoverlay_finalize (GObject * object) { - GstTextOverlay *overlay = GST_TEXTOVERLAY(object); - - if (overlay->layout) { - g_object_unref(overlay->layout); - overlay->layout = NULL; - } - if (overlay->bitmap.buffer) { - g_free(overlay->bitmap.buffer); - overlay->bitmap.buffer = NULL; - } - - G_OBJECT_CLASS(parent_class)->finalize(object); + GstTextOverlay *overlay = GST_TEXTOVERLAY (object); + + if (overlay->layout) { + g_object_unref (overlay->layout); + overlay->layout = NULL; + } + if (overlay->bitmap.buffer) { + g_free (overlay->bitmap.buffer); + overlay->bitmap.buffer = NULL; + } + + G_OBJECT_CLASS (parent_class)->finalize (object); } static void -gst_textoverlay_init(GstTextOverlay *overlay) +gst_textoverlay_init (GstTextOverlay * overlay) { - /* video sink */ - overlay->video_sinkpad = gst_pad_new_from_template( - gst_static_pad_template_get (&video_sink_template_factory), "video_sink"); + /* video sink */ + overlay->video_sinkpad = + gst_pad_new_from_template (gst_static_pad_template_get + (&video_sink_template_factory), "video_sink"); /* gst_pad_set_chain_function(overlay->video_sinkpad, gst_textoverlay_video_chain); */ - gst_pad_set_link_function(overlay->video_sinkpad, gst_textoverlay_video_sinkconnect); - gst_element_add_pad(GST_ELEMENT(overlay), overlay->video_sinkpad); - - /* text sink */ - overlay->text_sinkpad = gst_pad_new_from_template( - gst_static_pad_template_get (&text_sink_template_factory), "text_sink"); + gst_pad_set_link_function (overlay->video_sinkpad, + gst_textoverlay_video_sinkconnect); + gst_element_add_pad (GST_ELEMENT (overlay), overlay->video_sinkpad); + + /* text sink */ + overlay->text_sinkpad = + gst_pad_new_from_template (gst_static_pad_template_get + (&text_sink_template_factory), "text_sink"); /* gst_pad_set_link_function(overlay->text_sinkpad, gst_textoverlay_text_sinkconnect); */ - gst_element_add_pad(GST_ELEMENT(overlay), overlay->text_sinkpad); + gst_element_add_pad (GST_ELEMENT (overlay), overlay->text_sinkpad); - /* (video) source */ - overlay->srcpad = gst_pad_new_from_template( - gst_static_pad_template_get (&textoverlay_src_template_factory), "src"); - gst_element_add_pad(GST_ELEMENT(overlay), overlay->srcpad); + /* (video) source */ + overlay->srcpad = + gst_pad_new_from_template (gst_static_pad_template_get + (&textoverlay_src_template_factory), "src"); + gst_element_add_pad (GST_ELEMENT (overlay), overlay->srcpad); - overlay->layout = pango_layout_new(GST_TEXTOVERLAY_GET_CLASS(overlay)->pango_context); - memset(&overlay->bitmap, 0, sizeof(overlay->bitmap)); + overlay->layout = + pango_layout_new (GST_TEXTOVERLAY_GET_CLASS (overlay)->pango_context); + memset (&overlay->bitmap, 0, sizeof (overlay->bitmap)); - overlay->halign = GST_TEXT_OVERLAY_HALIGN_CENTER; - overlay->valign = GST_TEXT_OVERLAY_VALIGN_BASELINE; - overlay->x0 = overlay->y0 = 0; + overlay->halign = GST_TEXT_OVERLAY_HALIGN_CENTER; + overlay->valign = GST_TEXT_OVERLAY_VALIGN_BASELINE; + overlay->x0 = overlay->y0 = 0; - overlay->default_text = g_strdup(""); - overlay->need_render = TRUE; + overlay->default_text = g_strdup (""); + overlay->need_render = TRUE; - gst_element_set_loop_function(GST_ELEMENT(overlay), gst_textoverlay_loop); + gst_element_set_loop_function (GST_ELEMENT (overlay), gst_textoverlay_loop); } static void -gst_textoverlay_set_property(GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) +gst_textoverlay_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec) { - GstTextOverlay *overlay; + GstTextOverlay *overlay; - /* it's not null if we got it, but it might not be ours */ - g_return_if_fail(GST_IS_TEXTOVERLAY(object)); - overlay = GST_TEXTOVERLAY(object); + /* it's not null if we got it, but it might not be ours */ + g_return_if_fail (GST_IS_TEXTOVERLAY (object)); + overlay = GST_TEXTOVERLAY (object); - switch (prop_id) - { + switch (prop_id) { case ARG_TEXT: - if(overlay->default_text){ - g_free(overlay->default_text); - } - overlay->default_text = g_strdup(g_value_get_string(value)); - overlay->need_render = TRUE; - break; + if (overlay->default_text) { + g_free (overlay->default_text); + } + overlay->default_text = g_strdup (g_value_get_string (value)); + overlay->need_render = TRUE; + break; case ARG_VALIGN: - if (strcasecmp(g_value_get_string(value), "baseline") == 0) - overlay->valign = GST_TEXT_OVERLAY_VALIGN_BASELINE; - else if (strcasecmp(g_value_get_string(value), "bottom") == 0) - overlay->valign = GST_TEXT_OVERLAY_VALIGN_BOTTOM; - else if (strcasecmp(g_value_get_string(value), "top") == 0) - overlay->valign = GST_TEXT_OVERLAY_VALIGN_TOP; - else - g_warning("Invalid 'valign' property value: %s", - g_value_get_string(value)); - break; + if (strcasecmp (g_value_get_string (value), "baseline") == 0) + overlay->valign = GST_TEXT_OVERLAY_VALIGN_BASELINE; + else if (strcasecmp (g_value_get_string (value), "bottom") == 0) + overlay->valign = GST_TEXT_OVERLAY_VALIGN_BOTTOM; + else if (strcasecmp (g_value_get_string (value), "top") == 0) + overlay->valign = GST_TEXT_OVERLAY_VALIGN_TOP; + else + g_warning ("Invalid 'valign' property value: %s", + g_value_get_string (value)); + break; case ARG_HALIGN: - if (strcasecmp(g_value_get_string(value), "left") == 0) - overlay->halign = GST_TEXT_OVERLAY_HALIGN_LEFT; - else if (strcasecmp(g_value_get_string(value), "right") == 0) - overlay->halign = GST_TEXT_OVERLAY_HALIGN_RIGHT; - else if (strcasecmp(g_value_get_string(value), "center") == 0) - overlay->halign = GST_TEXT_OVERLAY_HALIGN_CENTER; - else - g_warning("Invalid 'halign' property value: %s", - g_value_get_string(value)); - break; + if (strcasecmp (g_value_get_string (value), "left") == 0) + overlay->halign = GST_TEXT_OVERLAY_HALIGN_LEFT; + else if (strcasecmp (g_value_get_string (value), "right") == 0) + overlay->halign = GST_TEXT_OVERLAY_HALIGN_RIGHT; + else if (strcasecmp (g_value_get_string (value), "center") == 0) + overlay->halign = GST_TEXT_OVERLAY_HALIGN_CENTER; + else + g_warning ("Invalid 'halign' property value: %s", + g_value_get_string (value)); + break; case ARG_X0: - overlay->x0 = g_value_get_int(value); - break; + overlay->x0 = g_value_get_int (value); + break; case ARG_Y0: - overlay->y0 = g_value_get_int(value); - break; + overlay->y0 = g_value_get_int (value); + break; case ARG_FONT_DESC: { - PangoFontDescription *desc; - desc = pango_font_description_from_string(g_value_get_string(value)); - if (desc) { - g_message("font description set: %s", g_value_get_string(value)); - pango_layout_set_font_description(overlay->layout, desc); - pango_font_description_free(desc); - render_text(overlay); - } else - g_warning("font description parse failed: %s", g_value_get_string(value)); - break; + PangoFontDescription *desc; + + desc = pango_font_description_from_string (g_value_get_string (value)); + if (desc) { + g_message ("font description set: %s", g_value_get_string (value)); + pango_layout_set_font_description (overlay->layout, desc); + pango_font_description_free (desc); + render_text (overlay); + } else + g_warning ("font description parse failed: %s", + g_value_get_string (value)); + break; } default: - break; - } + break; + } } static void -gst_textoverlay_get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) +gst_textoverlay_get_property (GObject * object, guint prop_id, GValue * value, + GParamSpec * pspec) { - GstTextOverlay *overlay; + GstTextOverlay *overlay; - /* it's not null if we got it, but it might not be ours */ - g_return_if_fail(GST_IS_TEXTOVERLAY(object)); - overlay = GST_TEXTOVERLAY(object); + /* it's not null if we got it, but it might not be ours */ + g_return_if_fail (GST_IS_TEXTOVERLAY (object)); + overlay = GST_TEXTOVERLAY (object); - switch (prop_id) { + switch (prop_id) { default: - G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec); - break; - } + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } } static gboolean -plugin_init(GstPlugin *plugin) +plugin_init (GstPlugin * plugin) { - if (!gst_element_register (plugin, "textoverlay", GST_RANK_PRIMARY, GST_TYPE_TEXTOVERLAY)) - return FALSE; + if (!gst_element_register (plugin, "textoverlay", GST_RANK_PRIMARY, + GST_TYPE_TEXTOVERLAY)) + return FALSE; - /*texttestsrc_plugin_init(module, plugin);*/ - /*subparse_plugin_init(module, plugin);*/ - return TRUE; + /*texttestsrc_plugin_init(module, plugin); */ + /*subparse_plugin_init(module, plugin); */ + return TRUE; } -GST_PLUGIN_DEFINE ( - GST_VERSION_MAJOR, +GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "textoverlay", - "Text overlay", - plugin_init, - VERSION, - "GPL", - GST_PACKAGE, - GST_ORIGIN) - + "Text overlay", plugin_init, VERSION, "GPL", GST_PACKAGE, GST_ORIGIN) |