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gstreamer/ext/assrender/gstassrender.c
Mark Nauwelaerts dd3ae904f9 assrender: process ATTACHMENT tag as sample
2012-07-27 13:22:52 +02:00

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/*
* Copyright (c) 2008 Benjamin Schmitz <vortex@wolpzone.de>
* Copyright (c) 2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-assrender
*
* Renders timestamped SSA/ASS subtitles on top of a video stream.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v filesrc location=/path/to/mkv ! matroskademux name=d ! queue ! mp3parse ! mad ! audioconvert ! autoaudiosink d. ! queue ! ffdec_h264 ! ffmpegcolorspace ! r. d. ! queue ! "application/x-ass" ! assrender name=r ! ffmpegcolorspace ! autovideosink
* ]| This pipeline demuxes a Matroska file with h.264 video, MP3 audio and embedded ASS subtitles and renders the subtitles on top of the video.
* </refsect2>
*/
/* FIXME 0.11: suppress warnings for deprecated API such as GStaticRecMutex
* with newer GLib versions (>= 2.31.0) */
#define GLIB_DISABLE_DEPRECATION_WARNINGS
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "gstassrender.h"
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (gst_ass_render_debug);
GST_DEBUG_CATEGORY_STATIC (gst_ass_render_lib_debug);
#define GST_CAT_DEFAULT gst_ass_render_debug
/* Filter signals and props */
enum
{
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_ENABLE,
PROP_EMBEDDEDFONTS
};
#define FORMATS "{ RGB, BGR, xRGB, xBGR, RGBx, BGRx, I420 }"
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (FORMATS))
);
static GstStaticPadTemplate video_sink_factory =
GST_STATIC_PAD_TEMPLATE ("video_sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (FORMATS))
);
static GstStaticPadTemplate text_sink_factory =
GST_STATIC_PAD_TEMPLATE ("text_sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-ass; application/x-ssa")
);
#define GST_ASS_RENDER_GET_LOCK(ass) (&GST_ASS_RENDER (ass)->lock)
#define GST_ASS_RENDER_GET_COND(ass) (&GST_ASS_RENDER (ass)->cond)
#define GST_ASS_RENDER_LOCK(ass) (g_mutex_lock (GST_ASS_RENDER_GET_LOCK (ass)))
#define GST_ASS_RENDER_UNLOCK(ass) (g_mutex_unlock (GST_ASS_RENDER_GET_LOCK (ass)))
#define GST_ASS_RENDER_WAIT(ass) (g_cond_wait (GST_ASS_RENDER_GET_COND (ass), GST_ASS_RENDER_GET_LOCK (ass)))
#define GST_ASS_RENDER_SIGNAL(ass) (g_cond_signal (GST_ASS_RENDER_GET_COND (ass)))
#define GST_ASS_RENDER_BROADCAST(ass)(g_cond_broadcast (GST_ASS_RENDER_GET_COND (ass)))
static void gst_ass_render_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_ass_render_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_ass_render_finalize (GObject * object);
static GstStateChangeReturn gst_ass_render_change_state (GstElement * element,
GstStateChange transition);
#define gst_ass_render_parent_class parent_class
G_DEFINE_TYPE (GstAssRender, gst_ass_render, GST_TYPE_ELEMENT);
static GstCaps *gst_ass_render_getcaps (GstPad * pad, GstCaps * filter);
static gboolean gst_ass_render_setcaps_video (GstPad * pad, GstCaps * caps);
static gboolean gst_ass_render_setcaps_text (GstPad * pad, GstCaps * caps);
static GstFlowReturn gst_ass_render_chain_video (GstPad * pad,
GstObject * parent, GstBuffer * buf);
static GstFlowReturn gst_ass_render_chain_text (GstPad * pad,
GstObject * parent, GstBuffer * buf);
static gboolean gst_ass_render_event_video (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_ass_render_event_text (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_ass_render_event_src (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_ass_render_query_video (GstPad * pad, GstObject * parent,
GstQuery * query);
static gboolean gst_ass_render_query_src (GstPad * pad, GstObject * parent,
GstQuery * query);
/* initialize the plugin's class */
static void
gst_ass_render_class_init (GstAssRenderClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *gstelement_class = (GstElementClass *) klass;
gobject_class->set_property = gst_ass_render_set_property;
gobject_class->get_property = gst_ass_render_get_property;
gobject_class->finalize = gst_ass_render_finalize;
g_object_class_install_property (gobject_class, PROP_ENABLE,
g_param_spec_boolean ("enable", "Enable",
"Enable rendering of subtitles", TRUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_EMBEDDEDFONTS,
g_param_spec_boolean ("embeddedfonts", "Embedded Fonts",
"Extract and use fonts embedded in the stream", TRUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_ass_render_change_state);
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&video_sink_factory));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&text_sink_factory));
gst_element_class_set_details_simple (gstelement_class, "ASS/SSA Render",
"Mixer/Video/Overlay/Subtitle",
"Renders ASS/SSA subtitles with libass",
"Benjamin Schmitz <vortex@wolpzone.de>, "
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
}
#if defined(LIBASS_VERSION) && LIBASS_VERSION >= 0x00907000
static void
_libass_message_cb (gint level, const gchar * fmt, va_list args,
gpointer render)
{
gchar *message = g_strdup_vprintf (fmt, args);
if (level < 2)
GST_CAT_ERROR_OBJECT (gst_ass_render_lib_debug, render, "%s", message);
else if (level < 4)
GST_CAT_WARNING_OBJECT (gst_ass_render_lib_debug, render, "%s", message);
else if (level < 5)
GST_CAT_INFO_OBJECT (gst_ass_render_lib_debug, render, "%s", message);
else if (level < 6)
GST_CAT_DEBUG_OBJECT (gst_ass_render_lib_debug, render, "%s", message);
else
GST_CAT_LOG_OBJECT (gst_ass_render_lib_debug, render, "%s", message);
g_free (message);
}
#endif
static void
gst_ass_render_init (GstAssRender * render)
{
GST_DEBUG_OBJECT (render, "init");
render->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
render->video_sinkpad =
gst_pad_new_from_static_template (&video_sink_factory, "video_sink");
render->text_sinkpad =
gst_pad_new_from_static_template (&text_sink_factory, "text_sink");
gst_pad_set_chain_function (render->video_sinkpad,
GST_DEBUG_FUNCPTR (gst_ass_render_chain_video));
gst_pad_set_chain_function (render->text_sinkpad,
GST_DEBUG_FUNCPTR (gst_ass_render_chain_text));
gst_pad_set_event_function (render->video_sinkpad,
GST_DEBUG_FUNCPTR (gst_ass_render_event_video));
gst_pad_set_event_function (render->text_sinkpad,
GST_DEBUG_FUNCPTR (gst_ass_render_event_text));
gst_pad_set_event_function (render->srcpad,
GST_DEBUG_FUNCPTR (gst_ass_render_event_src));
gst_pad_set_query_function (render->srcpad,
GST_DEBUG_FUNCPTR (gst_ass_render_query_src));
gst_pad_set_query_function (render->video_sinkpad,
GST_DEBUG_FUNCPTR (gst_ass_render_query_video));
gst_element_add_pad (GST_ELEMENT (render), render->srcpad);
gst_element_add_pad (GST_ELEMENT (render), render->video_sinkpad);
gst_element_add_pad (GST_ELEMENT (render), render->text_sinkpad);
gst_video_info_init (&render->info);
g_mutex_init (&render->lock);
g_cond_init (&render->cond);
render->renderer_init_ok = FALSE;
render->track_init_ok = FALSE;
render->enable = TRUE;
render->embeddedfonts = TRUE;
gst_segment_init (&render->video_segment, GST_FORMAT_TIME);
gst_segment_init (&render->subtitle_segment, GST_FORMAT_TIME);
g_mutex_init (&render->ass_mutex);
render->ass_library = ass_library_init ();
#if defined(LIBASS_VERSION) && LIBASS_VERSION >= 0x00907000
ass_set_message_cb (render->ass_library, _libass_message_cb, render);
#endif
ass_set_extract_fonts (render->ass_library, 1);
render->ass_renderer = ass_renderer_init (render->ass_library);
if (!render->ass_renderer) {
GST_WARNING_OBJECT (render, "cannot create renderer instance");
g_assert_not_reached ();
}
render->ass_track = NULL;
GST_DEBUG_OBJECT (render, "init complete");
}
static void
gst_ass_render_finalize (GObject * object)
{
GstAssRender *render = GST_ASS_RENDER (object);
g_mutex_clear (&render->lock);
g_cond_clear (&render->cond);
if (render->ass_track) {
ass_free_track (render->ass_track);
}
if (render->ass_renderer) {
ass_renderer_done (render->ass_renderer);
}
if (render->ass_library) {
ass_library_done (render->ass_library);
}
g_mutex_clear (&render->ass_mutex);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_ass_render_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAssRender *render = GST_ASS_RENDER (object);
GST_ASS_RENDER_LOCK (render);
switch (prop_id) {
case PROP_ENABLE:
render->enable = g_value_get_boolean (value);
break;
case PROP_EMBEDDEDFONTS:
render->embeddedfonts = g_value_get_boolean (value);
g_mutex_lock (&render->ass_mutex);
ass_set_extract_fonts (render->ass_library, render->embeddedfonts);
g_mutex_unlock (&render->ass_mutex);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_ASS_RENDER_UNLOCK (render);
}
static void
gst_ass_render_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstAssRender *render = GST_ASS_RENDER (object);
GST_ASS_RENDER_LOCK (render);
switch (prop_id) {
case PROP_ENABLE:
g_value_set_boolean (value, render->enable);
break;
case PROP_EMBEDDEDFONTS:
g_value_set_boolean (value, render->embeddedfonts);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_ASS_RENDER_UNLOCK (render);
}
static GstStateChangeReturn
gst_ass_render_change_state (GstElement * element, GstStateChange transition)
{
GstAssRender *render = GST_ASS_RENDER (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
GST_ASS_RENDER_LOCK (render);
render->subtitle_flushing = TRUE;
render->video_flushing = TRUE;
if (render->subtitle_pending)
gst_buffer_unref (render->subtitle_pending);
render->subtitle_pending = NULL;
GST_ASS_RENDER_BROADCAST (render);
GST_ASS_RENDER_UNLOCK (render);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
g_mutex_lock (&render->ass_mutex);
if (render->ass_track)
ass_free_track (render->ass_track);
render->ass_track = NULL;
render->track_init_ok = FALSE;
render->renderer_init_ok = FALSE;
g_mutex_unlock (&render->ass_mutex);
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
GST_ASS_RENDER_LOCK (render);
render->subtitle_flushing = FALSE;
render->video_flushing = FALSE;
render->video_eos = FALSE;
render->subtitle_eos = FALSE;
gst_segment_init (&render->video_segment, GST_FORMAT_TIME);
gst_segment_init (&render->subtitle_segment, GST_FORMAT_TIME);
GST_ASS_RENDER_UNLOCK (render);
break;
default:
break;
}
return ret;
}
static gboolean
gst_ass_render_query_src (GstPad * pad, GstObject * parent, GstQuery * query)
{
gboolean res = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CAPS:
{
GstCaps *filter, *caps;
gst_query_parse_caps (query, &filter);
caps = gst_ass_render_getcaps (pad, filter);
gst_query_set_caps_result (query, caps);
gst_caps_unref (caps);
res = TRUE;
break;
}
default:
res = gst_pad_query_default (pad, parent, query);
break;
}
return res;
}
static gboolean
gst_ass_render_event_src (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstAssRender *render = GST_ASS_RENDER (parent);
gboolean ret = FALSE;
GST_DEBUG_OBJECT (render, "received src event %" GST_PTR_FORMAT, event);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:{
GstSeekFlags flags;
if (!render->track_init_ok) {
GST_DEBUG_OBJECT (render, "seek received, pushing upstream");
ret = gst_pad_push_event (render->video_sinkpad, event);
return ret;
}
GST_DEBUG_OBJECT (render, "seek received, driving from here");
gst_event_parse_seek (event, NULL, NULL, &flags, NULL, NULL, NULL, NULL);
/* Flush downstream, only for flushing seek */
if (flags & GST_SEEK_FLAG_FLUSH)
gst_pad_push_event (render->srcpad, gst_event_new_flush_start ());
/* Mark subtitle as flushing, unblocks chains */
GST_ASS_RENDER_LOCK (render);
render->subtitle_flushing = TRUE;
render->video_flushing = TRUE;
if (render->subtitle_pending)
gst_buffer_unref (render->subtitle_pending);
render->subtitle_pending = NULL;
GST_ASS_RENDER_BROADCAST (render);
GST_ASS_RENDER_UNLOCK (render);
/* Seek on each sink pad */
gst_event_ref (event);
ret = gst_pad_push_event (render->video_sinkpad, event);
if (ret) {
ret = gst_pad_push_event (render->text_sinkpad, event);
} else {
gst_event_unref (event);
}
break;
}
default:
if (render->track_init_ok) {
gst_event_ref (event);
ret = gst_pad_push_event (render->video_sinkpad, event);
gst_pad_push_event (render->text_sinkpad, event);
} else {
ret = gst_pad_push_event (render->video_sinkpad, event);
}
break;
}
return ret;
}
static GstCaps *
gst_ass_render_getcaps (GstPad * pad, GstCaps * filter)
{
GstAssRender *render = GST_ASS_RENDER (gst_pad_get_parent (pad));
GstPad *otherpad;
GstCaps *caps;
GstCaps *templ;
if (pad == render->srcpad)
otherpad = render->video_sinkpad;
else
otherpad = render->srcpad;
templ = gst_pad_get_pad_template_caps (otherpad);
/* we can do what the peer can */
caps = gst_pad_peer_query_caps (otherpad, filter);
if (caps) {
GstCaps *temp;
/* filtered against our padtemplate */
temp = gst_caps_intersect (caps, templ);
gst_caps_unref (caps);
gst_caps_unref (templ);
/* this is what we can do */
caps = temp;
} else {
/* no peer, our padtemplate is enough then */
caps = templ;
}
gst_object_unref (render);
return caps;
}
#define CREATE_RGB_BLIT_FUNCTION(name,bpp,R,G,B) \
static void \
blit_##name (GstAssRender * render, ASS_Image * ass_image, GstVideoFrame * frame) \
{ \
guint counter = 0; \
gint alpha, r, g, b, k; \
const guint8 *src; \
guint8 *dst, *data; \
gint x, y, w, h; \
gint width; \
gint height; \
gint dst_stride; \
gint dst_skip; \
gint src_skip; \
\
width = GST_VIDEO_FRAME_WIDTH (frame); \
height = GST_VIDEO_FRAME_HEIGHT (frame); \
dst_stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0); \
data = GST_VIDEO_FRAME_PLANE_DATA (frame, 0); \
\
while (ass_image) { \
if (ass_image->dst_y > height || ass_image->dst_x > width) \
goto next; \
\
/* blend subtitles onto the video frame */ \
alpha = 255 - ((ass_image->color) & 0xff); \
r = ((ass_image->color) >> 24) & 0xff; \
g = ((ass_image->color) >> 16) & 0xff; \
b = ((ass_image->color) >> 8) & 0xff; \
src = ass_image->bitmap; \
dst = data + ass_image->dst_y * dst_stride + ass_image->dst_x * bpp; \
\
w = MIN (ass_image->w, width - ass_image->dst_x); \
h = MIN (ass_image->h, height - ass_image->dst_y); \
src_skip = ass_image->stride - w; \
dst_skip = dst_stride - w * bpp; \
\
for (y = 0; y < h; y++) { \
for (x = 0; x < w; x++) { \
k = src[0] * alpha / 255; \
dst[R] = (k * r + (255 - k) * dst[R]) / 255; \
dst[G] = (k * g + (255 - k) * dst[G]) / 255; \
dst[B] = (k * b + (255 - k) * dst[B]) / 255; \
src++; \
dst += bpp; \
} \
src += src_skip; \
dst += dst_skip; \
} \
next: \
counter++; \
ass_image = ass_image->next; \
} \
GST_LOG_OBJECT (render, "amount of rendered ass_image: %u", counter); \
}
CREATE_RGB_BLIT_FUNCTION (rgb, 3, 0, 1, 2);
CREATE_RGB_BLIT_FUNCTION (bgr, 3, 2, 1, 0);
CREATE_RGB_BLIT_FUNCTION (xrgb, 4, 1, 2, 3);
CREATE_RGB_BLIT_FUNCTION (xbgr, 4, 3, 2, 1);
CREATE_RGB_BLIT_FUNCTION (rgbx, 4, 0, 1, 2);
CREATE_RGB_BLIT_FUNCTION (bgrx, 4, 2, 1, 0);
#undef CREATE_RGB_BLIT_FUNCTION
static inline gint
rgb_to_y (gint r, gint g, gint b)
{
gint ret;
ret = (gint) (((19595 * r) >> 16) + ((38470 * g) >> 16) + ((7471 * b) >> 16));
ret = CLAMP (ret, 0, 255);
return ret;
}
static inline gint
rgb_to_u (gint r, gint g, gint b)
{
gint ret;
ret =
(gint) (-((11059 * r) >> 16) - ((21709 * g) >> 16) + ((32768 * b) >> 16) +
128);
ret = CLAMP (ret, 0, 255);
return ret;
}
static inline gint
rgb_to_v (gint r, gint g, gint b)
{
gint ret;
ret =
(gint) (((32768 * r) >> 16) - ((27439 * g) >> 16) - ((5329 * b) >> 16) +
128);
ret = CLAMP (ret, 0, 255);
return ret;
}
static void
blit_i420 (GstAssRender * render, ASS_Image * ass_image, GstVideoFrame * frame)
{
guint counter = 0;
gint alpha, r, g, b, k, k2;
gint Y, U, V;
const guint8 *src;
guint8 *dst_y, *dst_u, *dst_v;
gint x, y, w, h;
/* FIXME ignoring source image stride might be wrong here */
#if 0
gint w2;
gint src_stride;
#endif
gint width, height;
guint8 *y_data, *u_data, *v_data;
gint y_stride, u_stride, v_stride;
width = GST_VIDEO_FRAME_WIDTH (frame);
height = GST_VIDEO_FRAME_HEIGHT (frame);
y_data = GST_VIDEO_FRAME_COMP_DATA (frame, 0);
u_data = GST_VIDEO_FRAME_COMP_DATA (frame, 1);
v_data = GST_VIDEO_FRAME_COMP_DATA (frame, 2);
y_stride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 0);
u_stride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 1);
v_stride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 2);
while (ass_image) {
if (ass_image->dst_y > height || ass_image->dst_x > width)
goto next;
/* blend subtitles onto the video frame */
alpha = 255 - ((ass_image->color) & 0xff);
r = ((ass_image->color) >> 24) & 0xff;
g = ((ass_image->color) >> 16) & 0xff;
b = ((ass_image->color) >> 8) & 0xff;
Y = rgb_to_y (r, g, b);
U = rgb_to_u (r, g, b);
V = rgb_to_v (r, g, b);
w = MIN (ass_image->w, width - ass_image->dst_x);
h = MIN (ass_image->h, height - ass_image->dst_y);
#if 0
w2 = (w + 1) / 2;
src_stride = ass_image->stride;
#endif
src = ass_image->bitmap;
#if 0
dst_y = y_data + ass_image->dst_y * y_stride + ass_image->dst_x;
dst_u = u_data + (ass_image->dst_y / 2) * u_stride + ass_image->dst_x / 2;
dst_v = v_data + (ass_image->dst_y / 2) * v_stride + ass_image->dst_x / 2;
#endif
for (y = 0; y < h; y++) {
dst_y = y_data + (ass_image->dst_y + y) * y_stride + ass_image->dst_x;
for (x = 0; x < w; x++) {
k = src[y * ass_image->w + x] * alpha / 255;
dst_y[x] = (k * Y + (255 - k) * dst_y[x]) / 255;
}
}
y = 0;
if (ass_image->dst_y & 1) {
dst_u = u_data + (ass_image->dst_y / 2) * u_stride + ass_image->dst_x / 2;
dst_v = v_data + (ass_image->dst_y / 2) * v_stride + ass_image->dst_x / 2;
x = 0;
if (ass_image->dst_x & 1) {
k2 = src[y * ass_image->w + x] * alpha / 255;
k2 = (k2 + 2) >> 2;
dst_u[0] = (k2 * U + (255 - k2) * dst_u[0]) / 255;
dst_v[0] = (k2 * V + (255 - k2) * dst_v[0]) / 255;
x++;
dst_u++;
dst_v++;
}
for (; x < w - 1; x += 2) {
k2 = src[y * ass_image->w + x] * alpha / 255;
k2 += src[y * ass_image->w + x + 1] * alpha / 255;
k2 = (k2 + 2) >> 2;
dst_u[0] = (k2 * U + (255 - k2) * dst_u[0]) / 255;
dst_v[0] = (k2 * V + (255 - k2) * dst_v[0]) / 255;
dst_u++;
dst_v++;
}
if (x < w) {
k2 = src[y * ass_image->w + x] * alpha / 255;
k2 = (k2 + 2) >> 2;
dst_u[0] = (k2 * U + (255 - k2) * dst_u[0]) / 255;
dst_v[0] = (k2 * V + (255 - k2) * dst_v[0]) / 255;
}
}
for (; y < h - 1; y += 2) {
dst_u = u_data + ((ass_image->dst_y + y) / 2) * u_stride +
ass_image->dst_x / 2;
dst_v = v_data + ((ass_image->dst_y + y) / 2) * v_stride +
ass_image->dst_x / 2;
x = 0;
if (ass_image->dst_x & 1) {
k2 = src[y * ass_image->w + x] * alpha / 255;
k2 += src[(y + 1) * ass_image->w + x] * alpha / 255;
k2 = (k2 + 2) >> 2;
dst_u[0] = (k2 * U + (255 - k2) * dst_u[0]) / 255;
dst_v[0] = (k2 * V + (255 - k2) * dst_v[0]) / 255;
x++;
dst_u++;
dst_v++;
}
for (; x < w - 1; x += 2) {
k2 = src[y * ass_image->w + x] * alpha / 255;
k2 += src[y * ass_image->w + x + 1] * alpha / 255;
k2 += src[(y + 1) * ass_image->w + x] * alpha / 255;
k2 += src[(y + 1) * ass_image->w + x + 1] * alpha / 255;
k2 = (k2 + 2) >> 2;
dst_u[0] = (k2 * U + (255 - k2) * dst_u[0]) / 255;
dst_v[0] = (k2 * V + (255 - k2) * dst_v[0]) / 255;
dst_u++;
dst_v++;
}
if (x < w) {
k2 = src[y * ass_image->w + x] * alpha / 255;
k2 += src[(y + 1) * ass_image->w + x] * alpha / 255;
k2 = (k2 + 2) >> 2;
dst_u[0] = (k2 * U + (255 - k2) * dst_u[0]) / 255;
dst_v[0] = (k2 * V + (255 - k2) * dst_v[0]) / 255;
}
}
if (y < h) {
dst_u = u_data + (ass_image->dst_y / 2) * u_stride + ass_image->dst_x / 2;
dst_v = v_data + (ass_image->dst_y / 2) * v_stride + ass_image->dst_x / 2;
x = 0;
if (ass_image->dst_x & 1) {
k2 = src[y * ass_image->w + x] * alpha / 255;
k2 = (k2 + 2) >> 2;
dst_u[0] = (k2 * U + (255 - k2) * dst_u[0]) / 255;
dst_v[0] = (k2 * V + (255 - k2) * dst_v[0]) / 255;
x++;
dst_u++;
dst_v++;
}
for (; x < w - 1; x += 2) {
k2 = src[y * ass_image->w + x] * alpha / 255;
k2 += src[y * ass_image->w + x + 1] * alpha / 255;
k2 = (k2 + 2) >> 2;
dst_u[0] = (k2 * U + (255 - k2) * dst_u[0]) / 255;
dst_v[0] = (k2 * V + (255 - k2) * dst_v[0]) / 255;
dst_u++;
dst_v++;
}
if (x < w) {
k2 = src[y * ass_image->w + x] * alpha / 255;
k2 = (k2 + 2) >> 2;
dst_u[0] = (k2 * U + (255 - k2) * dst_u[0]) / 255;
dst_v[0] = (k2 * V + (255 - k2) * dst_v[0]) / 255;
}
}
next:
counter++;
ass_image = ass_image->next;
}
GST_LOG_OBJECT (render, "amount of rendered ass_image: %u", counter);
}
static gboolean
gst_ass_render_setcaps_video (GstPad * pad, GstCaps * caps)
{
GstAssRender *render = GST_ASS_RENDER (gst_pad_get_parent (pad));
gboolean ret = FALSE;
gint par_n = 1, par_d = 1;
gdouble dar;
GstVideoInfo info;
if (!gst_video_info_from_caps (&info, caps))
goto invalid_caps;
render->info = info;
ret = gst_pad_set_caps (render->srcpad, caps);
if (!ret)
goto out;
switch (GST_VIDEO_INFO_FORMAT (&info)) {
case GST_VIDEO_FORMAT_RGB:
render->blit = blit_rgb;
break;
case GST_VIDEO_FORMAT_BGR:
render->blit = blit_bgr;
break;
case GST_VIDEO_FORMAT_xRGB:
render->blit = blit_xrgb;
break;
case GST_VIDEO_FORMAT_xBGR:
render->blit = blit_xbgr;
break;
case GST_VIDEO_FORMAT_RGBx:
render->blit = blit_rgbx;
break;
case GST_VIDEO_FORMAT_BGRx:
render->blit = blit_bgrx;
break;
case GST_VIDEO_FORMAT_I420:
render->blit = blit_i420;
break;
default:
ret = FALSE;
goto out;
}
g_mutex_lock (&render->ass_mutex);
ass_set_frame_size (render->ass_renderer, info.width, info.height);
dar = (((gdouble) par_n) * ((gdouble) info.width))
/ (((gdouble) par_d) * ((gdouble) info.height));
#if !defined(LIBASS_VERSION) || LIBASS_VERSION < 0x00907000
ass_set_aspect_ratio (render->ass_renderer, dar);
#else
ass_set_aspect_ratio (render->ass_renderer,
dar, ((gdouble) info.width) / ((gdouble) info.height));
#endif
ass_set_font_scale (render->ass_renderer, 1.0);
ass_set_hinting (render->ass_renderer, ASS_HINTING_LIGHT);
#if !defined(LIBASS_VERSION) || LIBASS_VERSION < 0x00907000
ass_set_fonts (render->ass_renderer, "Arial", "sans-serif");
ass_set_fonts (render->ass_renderer, NULL, "Sans");
#else
ass_set_fonts (render->ass_renderer, "Arial", "sans-serif", 1, NULL, 1);
ass_set_fonts (render->ass_renderer, NULL, "Sans", 1, NULL, 1);
#endif
ass_set_margins (render->ass_renderer, 0, 0, 0, 0);
ass_set_use_margins (render->ass_renderer, 0);
g_mutex_unlock (&render->ass_mutex);
render->renderer_init_ok = TRUE;
GST_DEBUG_OBJECT (render, "ass renderer setup complete");
out:
gst_object_unref (render);
return ret;
/* ERRORS */
invalid_caps:
{
GST_ERROR_OBJECT (render, "Can't parse caps: %" GST_PTR_FORMAT, caps);
ret = FALSE;
goto out;
}
}
static gboolean
gst_ass_render_setcaps_text (GstPad * pad, GstCaps * caps)
{
GstAssRender *render = GST_ASS_RENDER (gst_pad_get_parent (pad));
GstStructure *structure;
const GValue *value;
GstBuffer *priv;
GstMapInfo map;
gboolean ret = FALSE;
structure = gst_caps_get_structure (caps, 0);
GST_DEBUG_OBJECT (render, "text pad linked with caps: %" GST_PTR_FORMAT,
caps);
value = gst_structure_get_value (structure, "codec_data");
g_mutex_lock (&render->ass_mutex);
if (value != NULL) {
priv = gst_value_get_buffer (value);
g_return_val_if_fail (priv != NULL, FALSE);
gst_buffer_map (priv, &map, GST_MAP_READ);
if (!render->ass_track)
render->ass_track = ass_new_track (render->ass_library);
ass_process_codec_private (render->ass_track, (char *) map.data, map.size);
gst_buffer_unmap (priv, &map);
GST_DEBUG_OBJECT (render, "ass track created");
render->track_init_ok = TRUE;
ret = TRUE;
} else if (!render->ass_track) {
render->ass_track = ass_new_track (render->ass_library);
render->track_init_ok = TRUE;
ret = TRUE;
}
g_mutex_unlock (&render->ass_mutex);
gst_object_unref (render);
return ret;
}
static void
gst_ass_render_process_text (GstAssRender * render, GstBuffer * buffer,
GstClockTime running_time, GstClockTime duration)
{
GstMapInfo map;
gdouble pts_start, pts_end;
pts_start = running_time;
pts_start /= GST_MSECOND;
pts_end = duration;
pts_end /= GST_MSECOND;
GST_DEBUG_OBJECT (render,
"Processing subtitles with running time %" GST_TIME_FORMAT
" and duration %" GST_TIME_FORMAT, GST_TIME_ARGS (running_time),
GST_TIME_ARGS (duration));
gst_buffer_map (buffer, &map, GST_MAP_READ);
g_mutex_lock (&render->ass_mutex);
ass_process_chunk (render->ass_track, (gchar *) map.data, map.size,
pts_start, pts_end);
g_mutex_unlock (&render->ass_mutex);
gst_buffer_unmap (buffer, &map);
gst_buffer_unref (buffer);
}
static GstFlowReturn
gst_ass_render_chain_video (GstPad * pad, GstObject * parent,
GstBuffer * buffer)
{
GstAssRender *render = GST_ASS_RENDER (parent);
GstFlowReturn ret = GST_FLOW_OK;
gboolean in_seg = FALSE;
guint64 start, stop, clip_start = 0, clip_stop = 0;
ASS_Image *ass_image;
if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
goto missing_timestamp;
/* ignore buffers that are outside of the current segment */
start = GST_BUFFER_TIMESTAMP (buffer);
if (!GST_BUFFER_DURATION_IS_VALID (buffer)) {
stop = GST_CLOCK_TIME_NONE;
} else {
stop = start + GST_BUFFER_DURATION (buffer);
}
/* segment_clip() will adjust start unconditionally to segment_start if
* no stop time is provided, so handle this ourselves */
if (stop == GST_CLOCK_TIME_NONE && start < render->video_segment.start)
goto out_of_segment;
in_seg =
gst_segment_clip (&render->video_segment, GST_FORMAT_TIME, start, stop,
&clip_start, &clip_stop);
if (!in_seg)
goto out_of_segment;
/* if the buffer is only partially in the segment, fix up stamps */
if (clip_start != start || (stop != -1 && clip_stop != stop)) {
GST_DEBUG_OBJECT (render, "clipping buffer timestamp/duration to segment");
buffer = gst_buffer_make_writable (buffer);
GST_BUFFER_TIMESTAMP (buffer) = clip_start;
if (stop != -1)
GST_BUFFER_DURATION (buffer) = clip_stop - clip_start;
}
/* now, after we've done the clipping, fix up end time if there's no
* duration (we only use those estimated values internally though, we
* don't want to set bogus values on the buffer itself) */
if (stop == -1) {
if (render->info.fps_n && render->info.fps_d) {
GST_DEBUG_OBJECT (render, "estimating duration based on framerate");
stop =
start + gst_util_uint64_scale_int (GST_SECOND, render->info.fps_d,
render->info.fps_n);
} else {
GST_WARNING_OBJECT (render, "no duration, assuming minimal duration");
stop = start + 1; /* we need to assume some interval */
}
}
wait_for_text_buf:
GST_ASS_RENDER_LOCK (render);
if (render->video_flushing)
goto flushing;
if (render->video_eos)
goto have_eos;
if (render->renderer_init_ok && render->track_init_ok && render->enable) {
/* Text pad linked, check if we have a text buffer queued */
if (render->subtitle_pending) {
gboolean pop_text = FALSE, valid_text_time = TRUE;
GstClockTime text_start = GST_CLOCK_TIME_NONE;
GstClockTime text_end = GST_CLOCK_TIME_NONE;
GstClockTime text_running_time = GST_CLOCK_TIME_NONE;
GstClockTime text_running_time_end = GST_CLOCK_TIME_NONE;
GstClockTime vid_running_time, vid_running_time_end;
/* if the text buffer isn't stamped right, pop it off the
* queue and display it for the current video frame only */
if (!GST_BUFFER_TIMESTAMP_IS_VALID (render->subtitle_pending) ||
!GST_BUFFER_DURATION_IS_VALID (render->subtitle_pending)) {
GST_WARNING_OBJECT (render,
"Got text buffer with invalid timestamp or duration");
valid_text_time = FALSE;
} else {
text_start = GST_BUFFER_TIMESTAMP (render->subtitle_pending);
text_end = text_start + GST_BUFFER_DURATION (render->subtitle_pending);
}
vid_running_time =
gst_segment_to_running_time (&render->video_segment, GST_FORMAT_TIME,
start);
vid_running_time_end =
gst_segment_to_running_time (&render->video_segment, GST_FORMAT_TIME,
stop);
/* If timestamp and duration are valid */
if (valid_text_time) {
text_running_time =
gst_segment_to_running_time (&render->video_segment,
GST_FORMAT_TIME, text_start);
text_running_time_end =
gst_segment_to_running_time (&render->video_segment,
GST_FORMAT_TIME, text_end);
}
GST_LOG_OBJECT (render, "T: %" GST_TIME_FORMAT " - %" GST_TIME_FORMAT,
GST_TIME_ARGS (text_running_time),
GST_TIME_ARGS (text_running_time_end));
GST_LOG_OBJECT (render, "V: %" GST_TIME_FORMAT " - %" GST_TIME_FORMAT,
GST_TIME_ARGS (vid_running_time),
GST_TIME_ARGS (vid_running_time_end));
/* Text too old or in the future */
if (valid_text_time && text_running_time_end <= vid_running_time) {
/* text buffer too old, get rid of it and do nothing */
GST_DEBUG_OBJECT (render, "text buffer too old, popping");
pop_text = FALSE;
gst_buffer_unref (render->subtitle_pending);
render->subtitle_pending = NULL;
GST_ASS_RENDER_BROADCAST (render);
GST_ASS_RENDER_UNLOCK (render);
goto wait_for_text_buf;
} else if (valid_text_time && vid_running_time_end <= text_running_time) {
gdouble timestamp;
GST_ASS_RENDER_UNLOCK (render);
timestamp = vid_running_time / GST_MSECOND;
g_mutex_lock (&render->ass_mutex);
/* not sure what the last parameter to this call is for (detect_change) */
ass_image = ass_render_frame (render->ass_renderer, render->ass_track,
timestamp, NULL);
g_mutex_unlock (&render->ass_mutex);
if (ass_image != NULL) {
GstVideoFrame frame;
buffer = gst_buffer_make_writable (buffer);
gst_video_frame_map (&frame, &render->info, buffer, GST_MAP_WRITE);
render->blit (render, ass_image, &frame);
gst_video_frame_unmap (&frame);
} else {
GST_LOG_OBJECT (render, "nothing to render right now");
}
/* Push the video frame */
ret = gst_pad_push (render->srcpad, buffer);
} else {
gdouble timestamp;
gst_ass_render_process_text (render, render->subtitle_pending,
text_running_time, text_running_time_end - text_running_time);
render->subtitle_pending = NULL;
GST_ASS_RENDER_BROADCAST (render);
GST_ASS_RENDER_UNLOCK (render);
/* libass needs timestamps in ms */
timestamp = vid_running_time / GST_MSECOND;
g_mutex_lock (&render->ass_mutex);
/* not sure what the last parameter to this call is for (detect_change) */
ass_image = ass_render_frame (render->ass_renderer, render->ass_track,
timestamp, NULL);
g_mutex_unlock (&render->ass_mutex);
if (ass_image != NULL) {
GstVideoFrame frame;
buffer = gst_buffer_make_writable (buffer);
gst_video_frame_map (&frame, &render->info, buffer, GST_MAP_WRITE);
render->blit (render, ass_image, &frame);
gst_video_frame_unmap (&frame);
} else {
GST_DEBUG_OBJECT (render, "nothing to render right now");
}
ret = gst_pad_push (render->srcpad, buffer);
if (valid_text_time && text_running_time_end <= vid_running_time_end) {
GST_LOG_OBJECT (render, "text buffer not needed any longer");
pop_text = TRUE;
}
}
if (pop_text) {
GST_ASS_RENDER_LOCK (render);
if (render->subtitle_pending)
gst_buffer_unref (render->subtitle_pending);
render->subtitle_pending = NULL;
GST_ASS_RENDER_BROADCAST (render);
GST_ASS_RENDER_UNLOCK (render);
}
} else {
gboolean wait_for_text_buf = TRUE;
if (render->subtitle_eos)
wait_for_text_buf = FALSE;
/* Text pad linked, but no text buffer available - what now? */
if (render->subtitle_segment.format == GST_FORMAT_TIME) {
GstClockTime text_start_running_time, text_last_stop_running_time;
GstClockTime vid_running_time;
vid_running_time =
gst_segment_to_running_time (&render->video_segment,
GST_FORMAT_TIME, GST_BUFFER_TIMESTAMP (buffer));
text_start_running_time =
gst_segment_to_running_time (&render->subtitle_segment,
GST_FORMAT_TIME, render->subtitle_segment.start);
text_last_stop_running_time =
gst_segment_to_running_time (&render->subtitle_segment,
GST_FORMAT_TIME, render->subtitle_segment.position);
if ((GST_CLOCK_TIME_IS_VALID (text_start_running_time) &&
vid_running_time < text_start_running_time) ||
(GST_CLOCK_TIME_IS_VALID (text_last_stop_running_time) &&
vid_running_time < text_last_stop_running_time)) {
wait_for_text_buf = FALSE;
}
}
if (wait_for_text_buf) {
GST_DEBUG_OBJECT (render, "no text buffer, need to wait for one");
GST_ASS_RENDER_WAIT (render);
GST_DEBUG_OBJECT (render, "resuming");
GST_ASS_RENDER_UNLOCK (render);
goto wait_for_text_buf;
} else {
GST_ASS_RENDER_UNLOCK (render);
GST_LOG_OBJECT (render, "no need to wait for a text buffer");
ret = gst_pad_push (render->srcpad, buffer);
}
}
} else {
GST_LOG_OBJECT (render, "rendering disabled, doing buffer passthrough");
GST_ASS_RENDER_UNLOCK (render);
ret = gst_pad_push (render->srcpad, buffer);
return ret;
}
GST_DEBUG_OBJECT (render, "leaving chain for buffer %p ret=%d", buffer, ret);
/* Update last_stop */
render->video_segment.position = clip_start;
return ret;
missing_timestamp:
{
GST_WARNING_OBJECT (render, "buffer without timestamp, discarding");
gst_buffer_unref (buffer);
return GST_FLOW_OK;
}
flushing:
{
GST_ASS_RENDER_UNLOCK (render);
GST_DEBUG_OBJECT (render, "flushing, discarding buffer");
gst_buffer_unref (buffer);
return GST_FLOW_FLUSHING;
}
have_eos:
{
GST_ASS_RENDER_UNLOCK (render);
GST_DEBUG_OBJECT (render, "eos, discarding buffer");
gst_buffer_unref (buffer);
return GST_FLOW_EOS;
}
out_of_segment:
{
GST_DEBUG_OBJECT (render, "buffer out of segment, discarding");
gst_buffer_unref (buffer);
return GST_FLOW_OK;
}
}
static GstFlowReturn
gst_ass_render_chain_text (GstPad * pad, GstObject * parent, GstBuffer * buffer)
{
GstFlowReturn ret = GST_FLOW_OK;
GstAssRender *render = GST_ASS_RENDER (parent);
gboolean in_seg = FALSE;
guint64 clip_start = 0, clip_stop = 0;
GST_DEBUG_OBJECT (render, "entering chain for buffer %p", buffer);
GST_ASS_RENDER_LOCK (render);
if (render->subtitle_flushing) {
GST_ASS_RENDER_UNLOCK (render);
ret = GST_FLOW_FLUSHING;
GST_LOG_OBJECT (render, "text flushing");
goto beach;
}
if (render->subtitle_eos) {
GST_ASS_RENDER_UNLOCK (render);
ret = GST_FLOW_EOS;
GST_LOG_OBJECT (render, "text EOS");
goto beach;
}
if (G_LIKELY (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))) {
GstClockTime stop;
if (G_LIKELY (GST_BUFFER_DURATION_IS_VALID (buffer)))
stop = GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer);
else
stop = GST_CLOCK_TIME_NONE;
in_seg = gst_segment_clip (&render->subtitle_segment, GST_FORMAT_TIME,
GST_BUFFER_TIMESTAMP (buffer), stop, &clip_start, &clip_stop);
} else {
in_seg = TRUE;
}
if (in_seg) {
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
GST_BUFFER_TIMESTAMP (buffer) = clip_start;
else if (GST_BUFFER_DURATION_IS_VALID (buffer))
GST_BUFFER_DURATION (buffer) = clip_stop - clip_start;
if (render->subtitle_pending
&& (!GST_BUFFER_TIMESTAMP_IS_VALID (render->subtitle_pending)
|| !GST_BUFFER_DURATION_IS_VALID (render->subtitle_pending))) {
gst_buffer_unref (render->subtitle_pending);
render->subtitle_pending = NULL;
GST_ASS_RENDER_BROADCAST (render);
} else {
/* Wait for the previous buffer to go away */
while (render->subtitle_pending != NULL) {
GST_DEBUG ("Pad %s:%s has a buffer queued, waiting",
GST_DEBUG_PAD_NAME (pad));
GST_ASS_RENDER_WAIT (render);
GST_DEBUG ("Pad %s:%s resuming", GST_DEBUG_PAD_NAME (pad));
if (render->subtitle_flushing) {
GST_ASS_RENDER_UNLOCK (render);
ret = GST_FLOW_FLUSHING;
goto beach;
}
}
}
if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
render->subtitle_segment.position = clip_start;
GST_DEBUG_OBJECT (render,
"New buffer arrived for timestamp %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)));
render->subtitle_pending = gst_buffer_ref (buffer);
/* in case the video chain is waiting for a text buffer, wake it up */
GST_ASS_RENDER_BROADCAST (render);
}
GST_ASS_RENDER_UNLOCK (render);
beach:
GST_DEBUG_OBJECT (render, "leaving chain for buffer %p", buffer);
gst_buffer_unref (buffer);
return ret;
}
static void
gst_ass_render_handle_tags (GstAssRender * render, GstTagList * taglist)
{
static const gchar *mimetypes[] = {
"application/x-font-ttf",
"application/x-font-otf",
"application/x-truetype-font"
};
static const gchar *extensions[] = {
".otf",
".ttf"
};
guint tag_size;
if (!taglist)
return;
tag_size = gst_tag_list_get_tag_size (taglist, GST_TAG_ATTACHMENT);
if (tag_size > 0 && render->embeddedfonts) {
GstSample *sample;
GstBuffer *buf;
const GstStructure *structure;
gboolean valid_mimetype, valid_extension;
guint j;
const gchar *filename;
guint index;
GstMapInfo map;
GST_DEBUG_OBJECT (render, "TAG event has attachments");
for (index = 0; index < tag_size; index++) {
if (!gst_tag_list_get_sample_index (taglist, GST_TAG_ATTACHMENT, index,
&sample))
continue;
buf = gst_sample_get_buffer (sample);
structure = gst_sample_get_info (sample);
if (!buf || !structure)
continue;
valid_mimetype = FALSE;
valid_extension = FALSE;
for (j = 0; j < G_N_ELEMENTS (mimetypes); j++) {
if (gst_structure_has_name (structure, mimetypes[j])) {
valid_mimetype = TRUE;
break;
}
}
filename = gst_structure_get_string (structure, "filename");
if (!filename)
continue;
if (!valid_mimetype) {
guint len = strlen (filename);
const gchar *extension = filename + len - 4;
for (j = 0; j < G_N_ELEMENTS (extensions); j++) {
if (g_ascii_strcasecmp (extension, extensions[j]) == 0) {
valid_extension = TRUE;
break;
}
}
}
if (valid_mimetype || valid_extension) {
g_mutex_lock (&render->ass_mutex);
gst_buffer_map (buf, &map, GST_MAP_READ);
ass_add_font (render->ass_library, (gchar *) filename,
(gchar *) map.data, map.size);
gst_buffer_unmap (buf, &map);
GST_DEBUG_OBJECT (render, "registered new font %s", filename);
g_mutex_unlock (&render->ass_mutex);
}
}
}
}
static gboolean
gst_ass_render_event_video (GstPad * pad, GstObject * parent, GstEvent * event)
{
gboolean ret = FALSE;
GstAssRender *render = GST_ASS_RENDER (parent);
GST_DEBUG_OBJECT (pad, "received video event %" GST_PTR_FORMAT, event);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
ret = gst_ass_render_setcaps_video (pad, caps);
gst_event_unref (event);
break;
}
case GST_EVENT_SEGMENT:
{
GstSegment segment;
GST_DEBUG_OBJECT (render, "received new segment");
gst_event_copy_segment (event, &segment);
if (segment.format == GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (render, "VIDEO SEGMENT now: %" GST_SEGMENT_FORMAT,
&render->video_segment);
render->video_segment = segment;
GST_DEBUG_OBJECT (render, "VIDEO SEGMENT after: %" GST_SEGMENT_FORMAT,
&render->video_segment);
ret = gst_pad_event_default (pad, parent, event);
} else {
GST_ELEMENT_WARNING (render, STREAM, MUX, (NULL),
("received non-TIME newsegment event on video input"));
ret = FALSE;
gst_event_unref (event);
}
break;
}
case GST_EVENT_TAG:
{
GstTagList *taglist = NULL;
/* tag events may contain attachments which might be fonts */
GST_DEBUG_OBJECT (render, "got TAG event");
gst_event_parse_tag (event, &taglist);
gst_ass_render_handle_tags (render, taglist);
ret = gst_pad_event_default (pad, parent, event);
break;
}
case GST_EVENT_EOS:
GST_ASS_RENDER_LOCK (render);
GST_INFO_OBJECT (render, "video EOS");
render->video_eos = TRUE;
GST_ASS_RENDER_UNLOCK (render);
ret = gst_pad_event_default (pad, parent, event);
break;
case GST_EVENT_FLUSH_START:
GST_ASS_RENDER_LOCK (render);
GST_INFO_OBJECT (render, "video flush start");
render->video_flushing = TRUE;
GST_ASS_RENDER_BROADCAST (render);
GST_ASS_RENDER_UNLOCK (render);
ret = gst_pad_event_default (pad, parent, event);
break;
case GST_EVENT_FLUSH_STOP:
GST_ASS_RENDER_LOCK (render);
GST_INFO_OBJECT (render, "video flush stop");
render->video_flushing = FALSE;
render->video_eos = FALSE;
gst_segment_init (&render->video_segment, GST_FORMAT_TIME);
GST_ASS_RENDER_UNLOCK (render);
ret = gst_pad_event_default (pad, parent, event);
break;
default:
ret = gst_pad_event_default (pad, parent, event);
break;
}
return ret;
}
static gboolean
gst_ass_render_query_video (GstPad * pad, GstObject * parent, GstQuery * query)
{
gboolean res = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CAPS:
{
GstCaps *filter, *caps;
gst_query_parse_caps (query, &filter);
caps = gst_ass_render_getcaps (pad, filter);
gst_query_set_caps_result (query, caps);
gst_caps_unref (caps);
res = TRUE;
break;
}
default:
res = gst_pad_query_default (pad, parent, query);
break;
}
return res;
}
static gboolean
gst_ass_render_event_text (GstPad * pad, GstObject * parent, GstEvent * event)
{
gint i;
gboolean ret = FALSE;
GstAssRender *render = GST_ASS_RENDER (parent);
GST_DEBUG_OBJECT (pad, "received text event %" GST_PTR_FORMAT, event);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
ret = gst_ass_render_setcaps_text (pad, caps);
gst_event_unref (event);
break;
}
case GST_EVENT_SEGMENT:
{
GstSegment segment;
GST_ASS_RENDER_LOCK (render);
render->subtitle_eos = FALSE;
GST_ASS_RENDER_UNLOCK (render);
gst_event_copy_segment (event, &segment);
GST_ASS_RENDER_LOCK (render);
if (segment.format == GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (render, "TEXT SEGMENT now: %" GST_SEGMENT_FORMAT,
&render->subtitle_segment);
render->subtitle_segment = segment;
GST_DEBUG_OBJECT (render,
"TEXT SEGMENT after: %" GST_SEGMENT_FORMAT,
&render->subtitle_segment);
} else {
GST_ELEMENT_WARNING (render, STREAM, MUX, (NULL),
("received non-TIME newsegment event on subtitle input"));
}
gst_event_unref (event);
ret = TRUE;
/* wake up the video chain, it might be waiting for a text buffer or
* a text segment update */
GST_ASS_RENDER_BROADCAST (render);
GST_ASS_RENDER_UNLOCK (render);
break;
}
case GST_EVENT_FLUSH_STOP:
GST_ASS_RENDER_LOCK (render);
GST_INFO_OBJECT (render, "text flush stop");
render->subtitle_flushing = FALSE;
render->subtitle_eos = FALSE;
if (render->subtitle_pending)
gst_buffer_unref (render->subtitle_pending);
render->subtitle_pending = NULL;
GST_ASS_RENDER_BROADCAST (render);
gst_segment_init (&render->subtitle_segment, GST_FORMAT_TIME);
GST_ASS_RENDER_UNLOCK (render);
gst_event_unref (event);
ret = TRUE;
break;
case GST_EVENT_FLUSH_START:
GST_DEBUG_OBJECT (render, "text flush start");
g_mutex_lock (&render->ass_mutex);
if (render->ass_track) {
/* delete any events on the ass_track */
for (i = 0; i < render->ass_track->n_events; i++) {
GST_DEBUG_OBJECT (render, "deleted event with eid %i", i);
ass_free_event (render->ass_track, i);
}
render->ass_track->n_events = 0;
GST_DEBUG_OBJECT (render, "done flushing");
}
g_mutex_unlock (&render->ass_mutex);
GST_ASS_RENDER_LOCK (render);
render->subtitle_flushing = TRUE;
GST_ASS_RENDER_BROADCAST (render);
GST_ASS_RENDER_UNLOCK (render);
gst_event_unref (event);
ret = TRUE;
break;
case GST_EVENT_EOS:
GST_ASS_RENDER_LOCK (render);
render->subtitle_eos = TRUE;
GST_INFO_OBJECT (render, "text EOS");
/* wake up the video chain, it might be waiting for a text buffer or
* a text segment update */
GST_ASS_RENDER_BROADCAST (render);
GST_ASS_RENDER_UNLOCK (render);
gst_event_unref (event);
ret = TRUE;
break;
case GST_EVENT_TAG:
{
GstTagList *taglist = NULL;
/* tag events may contain attachments which might be fonts */
GST_DEBUG_OBJECT (render, "got TAG event");
gst_event_parse_tag (event, &taglist);
gst_ass_render_handle_tags (render, taglist);
ret = gst_pad_event_default (pad, parent, event);
break;
}
default:
ret = gst_pad_event_default (pad, parent, event);
break;
}
return ret;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_ass_render_debug, "assrender",
0, "ASS/SSA subtitle renderer");
GST_DEBUG_CATEGORY_INIT (gst_ass_render_lib_debug, "assrender_library",
0, "ASS/SSA subtitle renderer library");
return gst_element_register (plugin, "assrender",
GST_RANK_PRIMARY, GST_TYPE_ASS_RENDER);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
assrender,
"ASS/SSA subtitle renderer",
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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