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gstreamer/ges/ges-timeline-pipeline.c

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/* GStreamer Editing Services
* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
* 2009 Nokia Corporation
*
* 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:ges-timeline-pipeline
* @short_description: Convenience #GstPipeline for editing.
*
* #GESTimelinePipeline allows developers to view and render #GESTimeline
* in a simple fashion.
* Its usage is inspired by the 'playbin' element from gst-plugins-base.
*/
#include <gst/gst.h>
#include <stdio.h>
#include "ges-internal.h"
#include "ges-timeline-pipeline.h"
#include "ges-screenshot.h"
#define DEFAULT_TIMELINE_MODE TIMELINE_MODE_PREVIEW
/* Structure corresponding to a timeline - sink link */
typedef struct
{
GESTrack *track;
GstElement *tee;
GstPad *srcpad; /* Timeline source pad */
GstPad *playsinkpad;
GstPad *encodebinpad;
} OutputChain;
G_DEFINE_TYPE (GESTimelinePipeline, ges_timeline_pipeline, GST_TYPE_PIPELINE);
static GstStateChangeReturn ges_timeline_pipeline_change_state (GstElement *
element, GstStateChange transition);
static OutputChain *get_output_chain_for_track (GESTimelinePipeline * self,
GESTrack * track);
static OutputChain *new_output_chain_for_track (GESTimelinePipeline * self,
GESTrack * track);
static void
ges_timeline_pipeline_dispose (GObject * object)
{
GESTimelinePipeline *self = GES_TIMELINE_PIPELINE (object);
if (self->playsink) {
if (self->mode & (TIMELINE_MODE_PREVIEW))
gst_bin_remove (GST_BIN (object), self->playsink);
else
gst_object_unref (self->playsink);
self->playsink = NULL;
}
if (self->encodebin) {
if (self->mode & (TIMELINE_MODE_RENDER | TIMELINE_MODE_SMART_RENDER))
gst_bin_remove (GST_BIN (object), self->encodebin);
else
gst_object_unref (self->encodebin);
self->encodebin = NULL;
}
if (self->profile) {
gst_encoding_profile_free (self->profile);
self->profile = NULL;
}
G_OBJECT_CLASS (ges_timeline_pipeline_parent_class)->dispose (object);
}
static void
ges_timeline_pipeline_class_init (GESTimelinePipelineClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
object_class->dispose = ges_timeline_pipeline_dispose;
element_class->change_state =
GST_DEBUG_FUNCPTR (ges_timeline_pipeline_change_state);
/* TODO : Add state_change handlers
* Don't change state if we don't have a timeline */
}
static void
ges_timeline_pipeline_init (GESTimelinePipeline * self)
{
GST_INFO_OBJECT (self, "Creating new 'playsink'");
self->playsink = gst_element_factory_make ("playsink", "internal-sinks");
self->encodebin =
gst_element_factory_make ("encodebin", "internal-encodebin");
/* Limit encodebin buffering to 1 buffer since we know the various
* stream fed to it are decoupled already */
g_object_set (self->encodebin, "queue-buffers-max", (guint32) 1,
"queue-bytes-max", (guint32) 0, "queue-time-max", (guint64) 0,
"use-smartencoder", TRUE, NULL);
if (G_UNLIKELY (self->playsink == NULL))
GST_ERROR_OBJECT (self, "Can't create playsink instance !");
if (G_UNLIKELY (self->encodebin == NULL))
GST_ERROR_OBJECT (self, "Can't create encodebin instance !");
ges_timeline_pipeline_set_mode (self, DEFAULT_TIMELINE_MODE);
}
/**
* ges_timeline_pipeline_new:
*
* Creates a new conveninence #GESTimelinePipeline.
*
* Returns: the new #GESTimelinePipeline.
*/
GESTimelinePipeline *
ges_timeline_pipeline_new (void)
{
return g_object_new (GES_TYPE_TIMELINE_PIPELINE, NULL);
}
#define TRACK_COMPATIBLE_PROFILE(tracktype, proftype) \
(((proftype) == GST_ENCODING_PROFILE_AUDIO && (tracktype) == GES_TRACK_TYPE_AUDIO) || \
((proftype) == GST_ENCODING_PROFILE_VIDEO && (tracktype) == GES_TRACK_TYPE_VIDEO) || \
((proftype) == GST_ENCODING_PROFILE_TEXT && (tracktype) == GES_TRACK_TYPE_TEXT))
static gboolean
ges_timeline_pipeline_update_caps (GESTimelinePipeline * self)
{
GList *ltrack, *tracks, *lstream;
if (!self->profile)
return TRUE;
GST_DEBUG ("Updating track caps");
tracks = ges_timeline_get_tracks (self->timeline);
/* Take each stream of the encoding profile and find a matching
* track to set the caps on */
for (ltrack = tracks; ltrack; ltrack = ltrack->next) {
GESTrack *track = (GESTrack *) ltrack->data;
/* Find a matching stream setting */
for (lstream = self->profile->encodingprofiles; lstream;
lstream = lstream->next) {
GstStreamEncodingProfile *prof =
(GstStreamEncodingProfile *) lstream->data;
if (TRACK_COMPATIBLE_PROFILE (track->type, prof->type)) {
if (self->mode == TIMELINE_MODE_SMART_RENDER) {
GstCaps *ocaps, *rcaps;
GST_DEBUG ("Smart Render mode, setting output caps");
ocaps = gst_stream_encoding_profile_get_output_caps (prof);
if (track->type == GES_TRACK_TYPE_AUDIO)
rcaps = gst_caps_from_string ("audio/x-raw-int;audio/x-raw-float");
else
rcaps = gst_caps_from_string ("video/x-raw-yuv;video/x-raw-rgb");
gst_caps_append (ocaps, rcaps);
ges_track_set_caps (track, ocaps);
} else {
GstCaps *caps = NULL;
/* Raw preview or rendering mode */
if (track->type == GES_TRACK_TYPE_VIDEO)
caps = gst_caps_from_string ("video/x-raw-yuv;video/x-raw-rgb");
else if (track->type == GES_TRACK_TYPE_AUDIO)
gst_caps_from_string ("audio/x-raw-int;audio/x-raw-float");
if (caps) {
ges_track_set_caps (track, caps);
gst_caps_unref (caps);
}
}
break;
}
}
g_object_unref (track);
}
if (tracks)
g_list_free (tracks);
GST_DEBUG ("Done updating caps");
return TRUE;
}
static GstStateChangeReturn
ges_timeline_pipeline_change_state (GstElement * element,
GstStateChange transition)
{
GESTimelinePipeline *self;
GstStateChangeReturn ret;
self = GES_TIMELINE_PIPELINE (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
if (G_UNLIKELY (self->timeline == NULL)) {
GST_ERROR_OBJECT (element,
"No GESTimeline set on the pipeline, cannot play !");
ret = GST_STATE_CHANGE_FAILURE;
goto done;
}
if (self->mode & (TIMELINE_MODE_RENDER | TIMELINE_MODE_SMART_RENDER))
GST_DEBUG ("rendering => Updating pipeline caps");
if (!ges_timeline_pipeline_update_caps (self)) {
GST_ERROR_OBJECT (element, "Error setting the caps for rendering");
ret = GST_STATE_CHANGE_FAILURE;
goto done;
}
/* Set caps on all tracks according to profile if present */
/* FIXME : Add a new SMART_RENDER mode to avoid decoding */
break;
default:
break;
}
ret =
GST_ELEMENT_CLASS (ges_timeline_pipeline_parent_class)->change_state
(element, transition);
done:
return ret;
}
static OutputChain *
new_output_chain_for_track (GESTimelinePipeline * self, GESTrack * track)
{
OutputChain *chain;
chain = g_new0 (OutputChain, 1);
chain->track = track;
return chain;
}
static OutputChain *
get_output_chain_for_track (GESTimelinePipeline * self, GESTrack * track)
{
GList *tmp;
for (tmp = self->chains; tmp; tmp = tmp->next) {
OutputChain *chain = (OutputChain *) tmp->data;
if (chain->track == track)
return chain;
}
return NULL;
}
/* Fetches a ocmpatible pad on the target element which isn't already
* linked */
static GstPad *
get_compatible_unlinked_pad (GstElement * element, GstPad * pad)
{
GstPad *res = NULL;
GstIterator *pads;
gboolean done = FALSE;
GstCaps *srccaps;
GST_DEBUG ("element : %s, pad %s:%s",
GST_ELEMENT_NAME (element), GST_DEBUG_PAD_NAME (pad));
if (GST_PAD_DIRECTION (pad) == GST_PAD_SRC)
pads = gst_element_iterate_sink_pads (element);
else
pads = gst_element_iterate_src_pads (element);
srccaps = gst_pad_get_caps_reffed (pad);
GST_DEBUG ("srccaps %" GST_PTR_FORMAT, srccaps);
while (!done) {
gpointer padptr;
switch (gst_iterator_next (pads, &padptr)) {
case GST_ITERATOR_OK:
{
GstPad *testpad = (GstPad *) padptr;
if (gst_pad_is_linked (testpad)) {
gst_object_unref (testpad);
} else {
GstCaps *sinkcaps = gst_pad_get_caps_reffed (testpad);
GST_DEBUG ("sinkccaps %" GST_PTR_FORMAT, sinkcaps);
if (gst_caps_can_intersect (srccaps, sinkcaps)) {
res = testpad;
done = TRUE;
} else
gst_object_unref (testpad);
gst_caps_unref (sinkcaps);
}
}
break;
case GST_ITERATOR_DONE:
case GST_ITERATOR_ERROR:
done = TRUE;
break;
case GST_ITERATOR_RESYNC:
gst_iterator_resync (pads);
break;
}
}
gst_iterator_free (pads);
gst_caps_unref (srccaps);
return res;
}
static void
pad_added_cb (GstElement * timeline, GstPad * pad, GESTimelinePipeline * self)
{
OutputChain *chain;
GESTrack *track;
GstPad *sinkpad;
gboolean reconfigured = FALSE;
GST_DEBUG_OBJECT (self, "new pad %s:%s , caps:%" GST_PTR_FORMAT,
GST_DEBUG_PAD_NAME (pad), GST_PAD_CAPS (pad));
if (G_UNLIKELY (!(track =
ges_timeline_get_track_for_pad (self->timeline, pad)))) {
GST_WARNING_OBJECT (self, "Couldn't find coresponding track !");
return;
}
/* Don't connect track if it's not going to be used */
if (track->type == GES_TRACK_TYPE_VIDEO &&
!(self->mode & TIMELINE_MODE_PREVIEW_VIDEO) &&
!(self->mode & TIMELINE_MODE_RENDER) &&
!(self->mode & TIMELINE_MODE_SMART_RENDER)) {
GST_DEBUG_OBJECT (self, "Video track... but we don't need it. Not linking");
}
if (track->type == GES_TRACK_TYPE_AUDIO &&
!(self->mode & TIMELINE_MODE_PREVIEW_AUDIO) &&
!(self->mode & TIMELINE_MODE_RENDER) &&
!(self->mode & TIMELINE_MODE_SMART_RENDER)) {
GST_DEBUG_OBJECT (self, "Audio track... but we don't need it. Not linking");
}
/* Get an existing chain or create it */
if (!(chain = get_output_chain_for_track (self, track)))
chain = new_output_chain_for_track (self, track);
chain->srcpad = pad;
/* Adding tee */
chain->tee = gst_element_factory_make ("tee", NULL);
gst_bin_add (GST_BIN_CAST (self), chain->tee);
gst_element_sync_state_with_parent (chain->tee);
/* Linking pad to tee */
sinkpad = gst_element_get_static_pad (chain->tee, "sink");
gst_pad_link_full (pad, sinkpad, GST_PAD_LINK_CHECK_NOTHING);
gst_object_unref (sinkpad);
/* Connect playsink */
if (self->mode & TIMELINE_MODE_PREVIEW) {
const gchar *sinkpad_name;
GstPad *tmppad;
GST_DEBUG_OBJECT (self, "Connecting to playsink");
switch (track->type) {
case GES_TRACK_TYPE_VIDEO:
sinkpad_name = "video_sink";
break;
case GES_TRACK_TYPE_AUDIO:
sinkpad_name = "audio_sink";
break;
case GES_TRACK_TYPE_TEXT:
sinkpad_name = "text_sink";
break;
default:
GST_WARNING_OBJECT (self, "Can't handle tracks of type %d yet",
track->type);
goto error;
}
/* Request a sinkpad from playsink */
if (G_UNLIKELY (!(sinkpad =
gst_element_get_request_pad (self->playsink, sinkpad_name)))) {
GST_ERROR_OBJECT (self, "Couldn't get a pad from the playsink !");
goto error;
}
tmppad = gst_element_get_request_pad (chain->tee, "src%d");
if (G_UNLIKELY (gst_pad_link_full (tmppad, sinkpad,
GST_PAD_LINK_CHECK_NOTHING) != GST_PAD_LINK_OK)) {
GST_ERROR_OBJECT (self, "Couldn't link track pad to playsink");
gst_object_unref (tmppad);
goto error;
}
gst_object_unref (tmppad);
GST_DEBUG ("Reconfiguring playsink");
/* reconfigure playsink */
g_signal_emit_by_name (self->playsink, "reconfigure", &reconfigured);
GST_DEBUG ("'reconfigure' returned %d", reconfigured);
/* We still hold a reference on the sinkpad */
chain->playsinkpad = sinkpad;
}
/* Connect to encodebin */
if (self->mode & (TIMELINE_MODE_RENDER | TIMELINE_MODE_SMART_RENDER)) {
GstPad *tmppad;
GST_DEBUG_OBJECT (self, "Connecting to encodebin");
if (!chain->encodebinpad) {
/* Check for unused static pads */
sinkpad = get_compatible_unlinked_pad (self->encodebin, pad);
if (sinkpad == NULL) {
GstCaps *caps = gst_pad_get_caps_reffed (pad);
/* If no compatible static pad is available, request a pad */
g_signal_emit_by_name (self->encodebin, "request-pad", caps, &sinkpad);
gst_caps_unref (caps);
if (G_UNLIKELY (sinkpad == NULL)) {
GST_ERROR_OBJECT (self, "Couldn't get a pad from encodebin !");
goto error;
}
}
chain->encodebinpad = sinkpad;
}
tmppad = gst_element_get_request_pad (chain->tee, "src%d");
if (G_UNLIKELY (gst_pad_link_full (tmppad,
chain->encodebinpad,
GST_PAD_LINK_CHECK_NOTHING) != GST_PAD_LINK_OK)) {
GST_WARNING_OBJECT (self, "Couldn't link track pad to playsink");
goto error;
}
gst_object_unref (tmppad);
}
/* If chain wasn't already present, insert it in list */
if (!get_output_chain_for_track (self, track))
self->chains = g_list_append (self->chains, chain);
GST_DEBUG ("done");
return;
error:
{
if (chain->tee) {
gst_bin_remove (GST_BIN_CAST (self), chain->tee);
}
if (sinkpad)
gst_object_unref (sinkpad);
g_free (chain);
}
}
static void
pad_removed_cb (GstElement * timeline, GstPad * pad, GESTimelinePipeline * self)
{
OutputChain *chain;
GESTrack *track;
GstPad *peer;
GST_DEBUG_OBJECT (self, "pad removed %s:%s", GST_DEBUG_PAD_NAME (pad));
if (G_UNLIKELY (!(track =
ges_timeline_get_track_for_pad (self->timeline, pad)))) {
GST_WARNING_OBJECT (self, "Couldn't find coresponding track !");
return;
}
if (G_UNLIKELY (!(chain = get_output_chain_for_track (self, track)))) {
GST_DEBUG_OBJECT (self, "Pad wasn't used");
return;
}
/* Unlink encodebin */
if (chain->encodebinpad) {
peer = gst_pad_get_peer (chain->encodebinpad);
gst_pad_unlink (peer, chain->encodebinpad);
gst_object_unref (peer);
gst_element_release_request_pad (self->encodebin, chain->encodebinpad);
}
/* Unlink playsink */
if (chain->playsinkpad) {
peer = gst_pad_get_peer (chain->playsinkpad);
gst_pad_unlink (peer, chain->playsinkpad);
gst_object_unref (peer);
gst_element_release_request_pad (self->playsink, chain->playsinkpad);
gst_object_unref (chain->playsinkpad);
}
/* Unlike/remove tee */
peer = gst_element_get_static_pad (chain->tee, "sink");
gst_pad_unlink (pad, peer);
gst_object_unref (peer);
gst_element_set_state (chain->tee, GST_STATE_NULL);
gst_bin_remove (GST_BIN (self), chain->tee);
self->chains = g_list_remove (self->chains, chain);
g_free (chain);
GST_DEBUG ("done");
}
/**
* ges_timeline_pipeline_add_timeline:
* @pipeline: a #GESTimelinePipeline
* @timeline: the #GESTimeline to set on the @pipeline.
*
* Sets the timeline to use in this pipeline.
*
* The reference to the @timeline will be stolen by the @pipeline.
*
* Returns: TRUE if the @timeline could be successfully set on the @pipeline,
* else FALSE.
*/
gboolean
ges_timeline_pipeline_add_timeline (GESTimelinePipeline * pipeline,
GESTimeline * timeline)
{
g_return_val_if_fail (pipeline->timeline == NULL, FALSE);
g_return_val_if_fail (timeline != NULL, FALSE);
GST_DEBUG ("pipeline:%p, timeline:%p", timeline, pipeline);
if (G_UNLIKELY (!gst_bin_add (GST_BIN_CAST (pipeline),
GST_ELEMENT (timeline)))) {
return FALSE;
}
pipeline->timeline = timeline;
/* Connect to pipeline */
g_signal_connect (timeline, "pad-added", (GCallback) pad_added_cb, pipeline);
g_signal_connect (timeline, "pad-removed", (GCallback) pad_removed_cb,
pipeline);
return TRUE;
}
/**
* ges_timeline_pipeline_set_render_settings:
* @pipeline: a #GESTimelinePipeline
* @output_uri: the %URI to which the timeline will be rendered
* @profile: the #GstEncodingProfile to use to render the timeline.
*
* Specify where the pipeline shall be rendered and with what settings.
*
* A copy of @profile and @output_uri will be done internally, the caller can
* safely free those values afterwards.
*
* This method must be called before setting the pipeline mode to
* #TIMELINE_MODE_RENDER
*
* Returns: %TRUE if the settings were aknowledged properly, else %FALSE
*/
gboolean
ges_timeline_pipeline_set_render_settings (GESTimelinePipeline * pipeline,
gchar * output_uri, GstEncodingProfile * profile)
{
/* Clear previous URI sink if it existed */
/* FIXME : We should figure out if it was added to the pipeline,
* and if so, remove it. */
if (pipeline->urisink) {
g_object_unref (pipeline->urisink);
pipeline->urisink = NULL;
}
pipeline->urisink =
gst_element_make_from_uri (GST_URI_SINK, output_uri, "urisink");
if (G_UNLIKELY (pipeline->urisink == NULL)) {
GST_ERROR_OBJECT (pipeline, "Couldn't not create sink for URI %s",
output_uri);
return FALSE;
}
if (pipeline->profile)
gst_encoding_profile_free (pipeline->profile);
g_object_set (pipeline->encodebin, "use-smartencoder",
!(!(pipeline->mode & TIMELINE_MODE_SMART_RENDER)), NULL);
g_object_set (pipeline->encodebin, "profile", profile, NULL);
pipeline->profile = gst_encoding_profile_copy (profile);
return TRUE;
}
/**
* ges_timeline_pipeline_set_mode:
* @pipeline: a #GESTimelinePipeline
* @mode: the #GESPipelineFlags to use
*
* switches the @pipeline to the specified @mode. The default mode when
* creating a #GESTimelinePipeline is #TIMELINE_MODE_PREVIEW.
*
* Note: The @pipeline will be set to #GST_STATE_NULL during this call due to
* the internal changes that happen. The caller will therefore have to
* set the @pipeline to the requested state after calling this method.
*
* Returns: %TRUE if the mode was properly set, else %FALSE.
**/
gboolean
ges_timeline_pipeline_set_mode (GESTimelinePipeline * pipeline,
GESPipelineFlags mode)
{
GST_DEBUG_OBJECT (pipeline, "current mode : %d, mode : %d", pipeline->mode,
mode);
/* fast-path, nothing to change */
if (mode == pipeline->mode)
return TRUE;
/* FIXME: It would be nice if we are only (de)activating preview
* modes to not set the whole pipeline to NULL, but instead just
* do the proper (un)linking to playsink. */
/* Switch pipeline to NULL since we're changing the configuration */
gst_element_set_state (GST_ELEMENT_CAST (pipeline), GST_STATE_NULL);
/* remove no-longer needed components */
if (pipeline->mode & TIMELINE_MODE_PREVIEW && !(mode & TIMELINE_MODE_PREVIEW)) {
/* Disable playsink */
GST_DEBUG ("Disabling playsink");
g_object_ref (pipeline->playsink);
gst_bin_remove (GST_BIN_CAST (pipeline), pipeline->playsink);
}
if ((pipeline->mode & (TIMELINE_MODE_RENDER | TIMELINE_MODE_SMART_RENDER)) &&
!(mode & (TIMELINE_MODE_RENDER | TIMELINE_MODE_SMART_RENDER))) {
/* Disable render bin */
GST_DEBUG ("Disabling rendering bin");
g_object_ref (pipeline->encodebin);
g_object_ref (pipeline->urisink);
gst_bin_remove_many (GST_BIN_CAST (pipeline),
pipeline->encodebin, pipeline->urisink, NULL);
}
/* Add new elements */
if (!(pipeline->mode & TIMELINE_MODE_PREVIEW) &&
(mode & TIMELINE_MODE_PREVIEW)) {
/* Add playsink */
GST_DEBUG ("Adding playsink");
if (!gst_bin_add (GST_BIN_CAST (pipeline), pipeline->playsink)) {
GST_ERROR_OBJECT (pipeline, "Couldn't add playsink");
return FALSE;
}
}
if (!(pipeline->mode & (TIMELINE_MODE_RENDER | TIMELINE_MODE_SMART_RENDER)) &&
(mode & (TIMELINE_MODE_RENDER | TIMELINE_MODE_SMART_RENDER))) {
/* Adding render bin */
GST_DEBUG ("Adding render bin");
if (G_UNLIKELY (pipeline->urisink == NULL)) {
GST_ERROR_OBJECT (pipeline, "Output URI not set !");
return FALSE;
}
if (!gst_bin_add (GST_BIN_CAST (pipeline), pipeline->encodebin)) {
GST_ERROR_OBJECT (pipeline, "Couldn't add encodebin");
return FALSE;
}
if (!gst_bin_add (GST_BIN_CAST (pipeline), pipeline->urisink)) {
GST_ERROR_OBJECT (pipeline, "Couldn't add URI sink");
return FALSE;
}
g_object_set (pipeline->encodebin, "use-smartencoder",
!(!(mode & TIMELINE_MODE_SMART_RENDER)), NULL);
gst_element_link_pads_full (pipeline->encodebin, "src", pipeline->urisink,
"sink", GST_PAD_LINK_CHECK_NOTHING);
}
/* FIXUPS */
/* FIXME
* If we are rendering, set playsink to sync=False,
* If we are NOT rendering, set playsink to sync=TRUE */
pipeline->mode = mode;
return TRUE;
}
/**
* ges_timeline_pipeline_get_thumbnail
* @self: a #GESTimelinePipeline in %GST_STATE_PLAYING or %GST_STATE_PAUSED
* @caps: caps specifying current format. Use %GST_CAPS_ANY for native size.
*
* Returns a #GstBuffer with the currently playing in the format specified by
* caps. The caller should unref the #gst_buffer_unref when finished. If %ANY
* caps are specified, the information will be returned in the whatever format
* is currently used by the sink. This information can be retrieve from caps
* associated with the buffer.
*
* Returns: a #GstBuffer or %NULL
*/
GstBuffer *
ges_timeline_pipeline_get_thumbnail_buffer (GESTimelinePipeline * self,
GstCaps * caps)
{
GstElement *sink;
GstBuffer *buf;
sink = self->playsink;
if (!sink) {
GST_WARNING ("thumbnailing can only be done if we have a playsink");
return NULL;
}
buf = ges_play_sink_convert_frame (sink, caps);
return buf;
}
/**
* ges_timeline_pipeline_save_thumbnail
* @self: a #GESTimelinePipeline in %GST_STATE_PLAYING or %GST_STATE_PAUSED
* @width: the requested width or -1 for native size
* @height: the requested height or -1 for native size
* @format: a string specifying the desired mime type (for example,
* image/jpeg)
* @location: the path to save the thumbnail
*
* A convenience method for ges_timeline_pipeline_get_thumbnail_raw which
* returns a buffer in 24-bit RGB, optionally scaled to the specified width
* and height. If -1 is specified for either dimension, it will be left at
* native size. You can retreive this information from the caps associated
* with the buffer.
*
* The caller is responsible for unreffing the returned buffer with
* #gst_buffer_unref.
*
* Returns: a #GstBuffer or %NULL
*/
gboolean
ges_timeline_pipeline_save_thumbnail (GESTimelinePipeline * self, int width, int
height, gchar * format, gchar * location)
{
GstBuffer *b;
FILE *fp;
GstCaps *caps;
gboolean res = TRUE;
caps = gst_caps_from_string (format);
if (width > 1)
gst_caps_set_simple (caps, "width", G_TYPE_INT, width, NULL);
if (height > 1)
gst_caps_set_simple (caps, "height", G_TYPE_INT, height, NULL);
if (!(b = ges_timeline_pipeline_get_thumbnail_buffer (self, caps))) {
gst_caps_unref (caps);
return res;
}
fp = fopen (location, "w+");
if (!fwrite (GST_BUFFER_DATA (b), GST_BUFFER_SIZE (b), 1, fp) || ferror (fp)) {
res = FALSE;
}
fclose (fp);
gst_caps_unref (caps);
gst_buffer_unref (b);
return res;
}
/**
* ges_timeline_pipeline_get_thumbnail_rgb24
* @self: a #GESTimelinePipeline in %GST_STATE_PLAYING or %GST_STATE_PAUSED
* @width: the requested width or -1 for native size
* @height: the requested height or -1 for native size
*
* A convenience method for ges_timeline_pipeline_get_thumbnail_raw which
* returns a buffer in 24-bit RGB, optionally scaled to the specified width
* and height. If -1 is specified for either dimension, it will be left at
* native size. You can retreive this information from the caps associated
* with the buffer.
*
* The caller is responsible for unreffing the returned buffer with
* #gst_buffer_unref.
*
* Returns: a #GstBuffer or %NULL
*/
GstBuffer *
ges_timeline_pipeline_get_thumbnail_rgb24 (GESTimelinePipeline * self,
gint width, gint height)
{
GstBuffer *ret;
GstCaps *caps;
caps = gst_caps_from_string ("video/x-raw-rgb,bpp=(int)24," "depth=(int)24");
if (width != -1)
gst_caps_set_simple (caps, "width", G_TYPE_INT, (gint) width, NULL);
if (height != -1)
gst_caps_set_simple (caps, "height", G_TYPE_INT, (gint) height, NULL);
ret = ges_timeline_pipeline_get_thumbnail_buffer (self, caps);
gst_caps_unref (caps);
return ret;
}
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