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assrender: refactor code to avoid duplication

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=692012
This commit is contained in:
Arnaud Vrac 2013-01-17 18:33:11 +01:00 committed by Tim-Philipp Müller
parent 61976b7aa7
commit c16d41d709
1 changed files with 53 additions and 85 deletions
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138
ext/assrender/gstassrender.c
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@ -319,6 +319,21 @@ gst_ass_render_get_property (GObject * object, guint prop_id,
GST_ASS_RENDER_UNLOCK (render);
}
/* Called with lock held */
static void
gst_ass_render_pop_text (GstAssRender * render)
{
if (render->subtitle_pending) {
GST_DEBUG_OBJECT (render, "releasing text buffer %p",
render->subtitle_pending);
gst_buffer_unref (render->subtitle_pending);
render->subtitle_pending = NULL;
}
/* Let the text task know we used that buffer */
GST_ASS_RENDER_BROADCAST (render);
}
static GstStateChangeReturn
gst_ass_render_change_state (GstElement * element, GstStateChange transition)
{
@ -330,10 +345,7 @@ gst_ass_render_change_state (GstElement * element, GstStateChange transition)
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_pop_text (render);
GST_ASS_RENDER_UNLOCK (render);
break;
default:
@ -427,10 +439,7 @@ gst_ass_render_event_src (GstPad * pad, GstObject * parent, GstEvent * event)
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_pop_text (render);
GST_ASS_RENDER_UNLOCK (render);
/* Seek on each sink pad */
@ -930,7 +939,6 @@ gst_ass_render_process_text (GstAssRender * render, GstBuffer * buffer,
g_mutex_unlock (&render->ass_mutex);
gst_buffer_unmap (buffer, &map);
gst_buffer_unref (buffer);
}
static GstFlowReturn
@ -1004,12 +1012,13 @@ wait_for_text_buf:
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;
gboolean 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;
gdouble timestamp;
/* if the text buffer isn't stamped right, pop it off the
* queue and display it for the current video frame only */
@ -1047,86 +1056,48 @@ wait_for_text_buf:
GST_TIME_ARGS (vid_running_time),
GST_TIME_ARGS (vid_running_time_end));
/* Text too old or in the future */
/* Text too old */
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_pop_text (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;
}
if (!valid_text_time || vid_running_time_end > text_running_time) {
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;
}
gst_ass_render_pop_text (render);
}
if (pop_text) {
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");
}
/* Push the video frame */
ret = gst_pad_push (render->srcpad, buffer);
if (valid_text_time && text_running_time_end <= vid_running_time_end) {
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_pop_text (render);
GST_ASS_RENDER_UNLOCK (render);
}
} else {
@ -1564,10 +1535,7 @@ gst_ass_render_event_text (GstPad * pad, GstObject * parent, GstEvent * event)
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_ass_render_pop_text (render);
gst_segment_init (&render->subtitle_segment, GST_FORMAT_TIME);
GST_ASS_RENDER_UNLOCK (render);
gst_event_unref (event);