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gstreamer/gst/encoding/gstencodebin.c

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/* GStreamer encoding bin
* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
* (C) 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstencodebin.h"
#include "gstsmartencoder.h"
#include "gststreamsplitter.h"
#include "gststreamcombiner.h"
#include <gst/gst-i18n-plugin.h>
/**
* SECTION:element-encodebin
*
* EncodeBin provides a bin for encoding/muxing various streams according to
* a specified #GstEncodingProfile.
*
* Based on the profile that was set (via the #GstEncodeBin:profile property),
* EncodeBin will internally select and configure the required elements
* (encoders, muxers, but also audio and video converters) so that you can
* provide it raw or pre-encoded streams of data in input and have your
* encoded/muxed/converted stream in output.
*
* <refsect2>
* <title>Features</title>
* <itemizedlist>
* <listitem>
* Automatic encoder and muxer selection based on elements available on the
* system.
* </listitem>
* <listitem>
* Conversion of raw audio/video streams (scaling, framerate conversion,
* colorspace conversion, samplerate conversion) to conform to the profile
* output format.
* </listitem>
* <listitem>
* Variable number of streams. If the presence property for a stream encoding
* profile is 0, you can request any number of sink pads for it via the
* standard request pad gstreamer API or the #GstEncodeBin::request-pad action
* signal.
* </listitem>
* <listitem>
* Avoid reencoding (passthrough). If the input stream is already encoded and is
* compatible with what the #GstEncodingProfile expects, then the stream won't
* be re-encoded but just passed through downstream to the muxer or the output.
* </listitem>
* <listitem>
* Mix pre-encoded and raw streams as input. In addition to the passthrough
* feature above, you can feed both raw audio/video *AND* already-encoded data
* to a pad. #GstEncodeBin will take care of passing through the compatible
* segments and re-encoding the segments of media that need encoding.
* </listitem>
* <listitem>
* Standard behaviour is to use a #GstEncodingContainerProfile to have both
* encoding and muxing performed. But you can also provide a single stream
* profile (like #GstEncodingAudioProfile) to only have the encoding done and
* handle the encoded output yourself.
* </listitem>
* <listitem>
* Audio imperfection corrections. Incoming audio streams can have non perfect
* timestamps (jitter), like the streams coming from ASF files. #GstEncodeBin
* will automatically fix those imperfections for you. See
* #GstEncodeBin:audio-jitter-tolerance for more details.
* </listitem>
* <listitem>
* Variable or Constant video framerate. If your #GstEncodingVideoProfile has
* the variableframerate property deactivated (default), then the incoming
* raw video stream will be retimestampped in order to produce a constant
* framerate.
* </listitem>
* <listitem>
* Cross-boundary re-encoding. When feeding compatible pre-encoded streams that
* fall on segment boundaries, and for supported formats (right now only H263),
* the GOP will be decoded/reencoded when needed to produce an encoded output
* that fits exactly within the request GstSegment.
* </listitem>
* <listitem>
* Missing plugin support. If a #GstElement is missing to encode/mux to the
* request profile formats, a missing-plugin #GstMessage will be posted on the
* #GstBus, allowing systems that support the missing-plugin system to offer the
* user a way to install the missing element.
* </listitem>
* </itemizedlist>
* </refsect2>
*/
/* TODO/FIXME
*
* Handling mp3!xing!idv3 and theora!ogg tagsetting scenarios:
* Once we have chosen a muxer:
* When a new stream is requested:
* If muxer isn't 'Formatter' OR doesn't have a TagSetter interface:
* Find a Formatter for the given stream (preferably with TagSetter)
* Insert that before muxer
**/
#define fast_pad_link(a,b) gst_pad_link_full((a),(b),GST_PAD_LINK_CHECK_NOTHING)
#define fast_element_link(a,b) gst_element_link_pads_full((a),"src",(b),"sink",GST_PAD_LINK_CHECK_NOTHING)
typedef enum
{
GST_ENC_FLAG_NO_AUDIO_CONVERSION = (1 << 0),
GST_ENC_FLAG_NO_VIDEO_CONVERSION = (1 << 1)
} GstEncFlags;
#define GST_TYPE_ENC_FLAGS (gst_enc_flags_get_type())
GType gst_enc_flags_get_type (void);
/* generic templates */
static GstStaticPadTemplate muxer_src_template =
GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate video_sink_template =
GST_STATIC_PAD_TEMPLATE ("video_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate audio_sink_template =
GST_STATIC_PAD_TEMPLATE ("audio_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
/* static GstStaticPadTemplate text_sink_template = */
/* GST_STATIC_PAD_TEMPLATE ("text_%u", */
/* GST_PAD_SINK, */
/* GST_PAD_REQUEST, */
/* GST_STATIC_CAPS_ANY); */
static GstStaticPadTemplate private_sink_template =
GST_STATIC_PAD_TEMPLATE ("private_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
struct _GstEncodeBin
{
GstBin parent;
/* the profile field is only valid if it could be entirely setup */
GstEncodingProfile *profile;
GList *streams; /* List of StreamGroup, not sorted */
GstElement *muxer;
/* Ghostpad with changing target */
GstPad *srcpad;
/* TRUE if in PAUSED/PLAYING */
gboolean active;
/* available muxers, encoders and parsers */
GList *muxers;
GList *formatters;
GList *encoders;
GList *parsers;
/* Increasing counter for unique pad name */
guint last_pad_id;
/* Cached caps for identification */
GstCaps *raw_video_caps;
GstCaps *raw_audio_caps;
/* GstCaps *raw_text_caps; */
guint queue_buffers_max;
guint queue_bytes_max;
guint64 queue_time_max;
guint64 tolerance;
gboolean avoid_reencoding;
GstEncFlags flags;
};
struct _GstEncodeBinClass
{
GstBinClass parent;
/* Action Signals */
GstPad *(*request_pad) (GstEncodeBin * encodebin, GstCaps * caps);
};
typedef struct _StreamGroup StreamGroup;
struct _StreamGroup
{
GstEncodeBin *ebin;
GstEncodingProfile *profile;
GstPad *ghostpad; /* Sink ghostpad */
GstElement *inqueue; /* Queue just after the ghostpad */
GstElement *splitter;
GList *converters; /* List of conversion GstElement */
GstElement *capsfilter; /* profile->restriction (if non-NULL/ANY) */
GstElement *encoder; /* Encoder (can be NULL) */
GstElement *combiner;
GstElement *parser;
GstElement *smartencoder;
GstElement *outfilter; /* Output capsfilter (streamprofile.format) */
GstElement *formatter;
GstElement *outqueue; /* Queue just before the muxer */
};
/* Default for queues (same defaults as queue element) */
#define DEFAULT_QUEUE_BUFFERS_MAX 200
#define DEFAULT_QUEUE_BYTES_MAX 10 * 1024 * 1024
#define DEFAULT_QUEUE_TIME_MAX GST_SECOND
#define DEFAULT_AUDIO_JITTER_TOLERANCE 20 * GST_MSECOND
#define DEFAULT_AVOID_REENCODING FALSE
#define DEFAULT_FLAGS 0
#define DEFAULT_RAW_CAPS \
"video/x-raw; " \
"audio/x-raw; " \
"text/plain; " \
"text/x-pango-markup; " \
"video/x-dvd-subpicture; " \
"subpicture/x-pgs"
/* Properties */
enum
{
PROP_0,
PROP_PROFILE,
PROP_QUEUE_BUFFERS_MAX,
PROP_QUEUE_BYTES_MAX,
PROP_QUEUE_TIME_MAX,
PROP_AUDIO_JITTER_TOLERANCE,
PROP_AVOID_REENCODING,
PROP_FLAGS,
PROP_LAST
};
/* Signals */
enum
{
SIGNAL_REQUEST_PAD,
LAST_SIGNAL
};
#define C_FLAGS(v) ((guint) v)
GType
gst_enc_flags_get_type (void)
{
static const GFlagsValue values[] = {
{C_FLAGS (GST_ENC_FLAG_NO_AUDIO_CONVERSION), "Do not use audio conversion "
"elements", "no-audio-conversion"},
{C_FLAGS (GST_ENC_FLAG_NO_VIDEO_CONVERSION), "Do not use video conversion "
"elements", "no-video-conversion"},
{0, NULL, NULL}
};
static volatile GType id = 0;
if (g_once_init_enter ((gsize *) & id)) {
GType _id;
_id = g_flags_register_static ("GstEncFlags", values);
g_once_init_leave ((gsize *) & id, _id);
}
return id;
}
static guint gst_encode_bin_signals[LAST_SIGNAL] = { 0 };
static GstStaticCaps default_raw_caps = GST_STATIC_CAPS (DEFAULT_RAW_CAPS);
GST_DEBUG_CATEGORY_STATIC (gst_encode_bin_debug);
#define GST_CAT_DEFAULT gst_encode_bin_debug
G_DEFINE_TYPE (GstEncodeBin, gst_encode_bin, GST_TYPE_BIN);
static void gst_encode_bin_dispose (GObject * object);
static void gst_encode_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_encode_bin_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstStateChangeReturn gst_encode_bin_change_state (GstElement * element,
GstStateChange transition);
static GstPad *gst_encode_bin_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps);
static void gst_encode_bin_release_pad (GstElement * element, GstPad * pad);
static gboolean
gst_encode_bin_set_profile (GstEncodeBin * ebin, GstEncodingProfile * profile);
static void gst_encode_bin_tear_down_profile (GstEncodeBin * ebin);
static gboolean gst_encode_bin_setup_profile (GstEncodeBin * ebin,
GstEncodingProfile * profile);
static StreamGroup *_create_stream_group (GstEncodeBin * ebin,
GstEncodingProfile * sprof, const gchar * sinkpadname, GstCaps * sinkcaps);
static void stream_group_remove (GstEncodeBin * ebin, StreamGroup * sgroup);
static GstPad *gst_encode_bin_request_pad_signal (GstEncodeBin * encodebin,
GstCaps * caps);
static inline GstElement *_get_formatter (GstEncodeBin * ebin,
GstEncodingProfile * sprof);
static void
gst_encode_bin_class_init (GstEncodeBinClass * klass)
{
GObjectClass *gobject_klass;
GstElementClass *gstelement_klass;
gobject_klass = (GObjectClass *) klass;
gstelement_klass = (GstElementClass *) klass;
gobject_klass->dispose = gst_encode_bin_dispose;
gobject_klass->set_property = gst_encode_bin_set_property;
gobject_klass->get_property = gst_encode_bin_get_property;
/* Properties */
/**
* GstEncodeBin:profile:
*
* The #GstEncodingProfile to use. This property must be set before going
* to %GST_STATE_PAUSED or higher.
*/
g_object_class_install_property (gobject_klass, PROP_PROFILE,
g_param_spec_object ("profile", "Profile",
"The GstEncodingProfile to use", GST_TYPE_ENCODING_PROFILE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_klass, PROP_QUEUE_BYTES_MAX,
g_param_spec_uint ("queue-bytes-max", "Max. size (kB)",
"Max. amount of data in the queue (bytes, 0=disable)",
0, G_MAXUINT, DEFAULT_QUEUE_BYTES_MAX,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_klass, PROP_QUEUE_BUFFERS_MAX,
g_param_spec_uint ("queue-buffers-max", "Max. size (buffers)",
"Max. number of buffers in the queue (0=disable)", 0, G_MAXUINT,
DEFAULT_QUEUE_BUFFERS_MAX,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_klass, PROP_QUEUE_TIME_MAX,
g_param_spec_uint64 ("queue-time-max", "Max. size (ns)",
"Max. amount of data in the queue (in ns, 0=disable)", 0, G_MAXUINT64,
DEFAULT_QUEUE_TIME_MAX, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_klass, PROP_AUDIO_JITTER_TOLERANCE,
g_param_spec_uint64 ("audio-jitter-tolerance", "Audio jitter tolerance",
"Amount of timestamp jitter/imperfection to allow on audio streams before inserting/dropping samples (ns)",
0, G_MAXUINT64, DEFAULT_AUDIO_JITTER_TOLERANCE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_klass, PROP_AVOID_REENCODING,
g_param_spec_boolean ("avoid-reencoding", "Avoid re-encoding",
"Whether to re-encode portions of compatible video streams that lay on segment boundaries",
DEFAULT_AVOID_REENCODING,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstEncodeBin:flags
*
* Control the behaviour of encodebin.
*/
g_object_class_install_property (gobject_klass, PROP_FLAGS,
g_param_spec_flags ("flags", "Flags", "Flags to control behaviour",
GST_TYPE_ENC_FLAGS, DEFAULT_FLAGS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/* Signals */
/**
* GstEncodeBin::request-pad
* @encodebin: a #GstEncodeBin instance
* @caps: a #GstCaps
*
* Use this method to request an unused sink request #GstPad that can take the
* provided @caps as input. You must release the pad with
* gst_element_release_request_pad() when you are done with it.
*
* Returns: A compatible #GstPad, or %NULL if no compatible #GstPad could be
* created or is available.
*/
gst_encode_bin_signals[SIGNAL_REQUEST_PAD] =
g_signal_new ("request-pad", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GstEncodeBinClass,
request_pad), NULL, NULL, gst_encode_marshal_OBJECT__BOXED,
GST_TYPE_PAD, 1, GST_TYPE_CAPS);
klass->request_pad = gst_encode_bin_request_pad_signal;
gst_element_class_add_pad_template (gstelement_klass,
gst_static_pad_template_get (&muxer_src_template));
gst_element_class_add_pad_template (gstelement_klass,
gst_static_pad_template_get (&video_sink_template));
gst_element_class_add_pad_template (gstelement_klass,
gst_static_pad_template_get (&audio_sink_template));
/* gst_element_class_add_pad_template (gstelement_klass, */
/* gst_static_pad_template_get (&text_sink_template)); */
gst_element_class_add_pad_template (gstelement_klass,
gst_static_pad_template_get (&private_sink_template));
gstelement_klass->change_state =
GST_DEBUG_FUNCPTR (gst_encode_bin_change_state);
gstelement_klass->request_new_pad =
GST_DEBUG_FUNCPTR (gst_encode_bin_request_new_pad);
gstelement_klass->release_pad =
GST_DEBUG_FUNCPTR (gst_encode_bin_release_pad);
gst_element_class_set_details_simple (gstelement_klass,
"Encoder Bin",
"Generic/Bin/Encoder",
"Convenience encoding/muxing element",
"Edward Hervey <edward.hervey@collabora.co.uk>");
}
static void
gst_encode_bin_dispose (GObject * object)
{
GstEncodeBin *ebin = (GstEncodeBin *) object;
if (ebin->muxers)
gst_plugin_feature_list_free (ebin->muxers);
if (ebin->formatters)
gst_plugin_feature_list_free (ebin->formatters);
if (ebin->encoders)
gst_plugin_feature_list_free (ebin->encoders);
if (ebin->parsers)
gst_plugin_feature_list_free (ebin->parsers);
gst_encode_bin_tear_down_profile (ebin);
if (ebin->raw_video_caps)
gst_caps_unref (ebin->raw_video_caps);
if (ebin->raw_audio_caps)
gst_caps_unref (ebin->raw_audio_caps);
/* if (ebin->raw_text_caps) */
/* gst_caps_unref (ebin->raw_text_caps); */
G_OBJECT_CLASS (gst_encode_bin_parent_class)->dispose (object);
}
static void
gst_encode_bin_init (GstEncodeBin * encode_bin)
{
GstPadTemplate *tmpl;
encode_bin->muxers =
gst_element_factory_list_get_elements (GST_ELEMENT_FACTORY_TYPE_MUXER,
GST_RANK_MARGINAL);
encode_bin->formatters =
gst_element_factory_list_get_elements (GST_ELEMENT_FACTORY_TYPE_FORMATTER,
GST_RANK_SECONDARY);
encode_bin->encoders =
gst_element_factory_list_get_elements (GST_ELEMENT_FACTORY_TYPE_ENCODER,
GST_RANK_MARGINAL);
encode_bin->parsers =
gst_element_factory_list_get_elements (GST_ELEMENT_FACTORY_TYPE_PARSER,
GST_RANK_MARGINAL);
encode_bin->raw_video_caps = gst_caps_from_string ("video/x-raw");
encode_bin->raw_audio_caps = gst_caps_from_string ("audio/x-raw");
/* encode_bin->raw_text_caps = */
/* gst_caps_from_string ("text/plain;text/x-pango-markup"); */
encode_bin->queue_buffers_max = DEFAULT_QUEUE_BUFFERS_MAX;
encode_bin->queue_bytes_max = DEFAULT_QUEUE_BYTES_MAX;
encode_bin->queue_time_max = DEFAULT_QUEUE_TIME_MAX;
encode_bin->tolerance = DEFAULT_AUDIO_JITTER_TOLERANCE;
encode_bin->avoid_reencoding = DEFAULT_AVOID_REENCODING;
encode_bin->flags = DEFAULT_FLAGS;
tmpl = gst_static_pad_template_get (&muxer_src_template);
encode_bin->srcpad = gst_ghost_pad_new_no_target_from_template ("src", tmpl);
gst_object_unref (tmpl);
gst_element_add_pad (GST_ELEMENT_CAST (encode_bin), encode_bin->srcpad);
}
static void
gst_encode_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstEncodeBin *ebin = (GstEncodeBin *) object;
switch (prop_id) {
case PROP_PROFILE:
gst_encode_bin_set_profile (ebin,
(GstEncodingProfile *) g_value_get_object (value));
break;
case PROP_QUEUE_BUFFERS_MAX:
ebin->queue_buffers_max = g_value_get_uint (value);
break;
case PROP_QUEUE_BYTES_MAX:
ebin->queue_bytes_max = g_value_get_uint (value);
break;
case PROP_QUEUE_TIME_MAX:
ebin->queue_time_max = g_value_get_uint64 (value);
break;
case PROP_AUDIO_JITTER_TOLERANCE:
ebin->tolerance = g_value_get_uint64 (value);
break;
case PROP_AVOID_REENCODING:
ebin->avoid_reencoding = g_value_get_boolean (value);
break;
case PROP_FLAGS:
ebin->flags = g_value_get_flags (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_encode_bin_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstEncodeBin *ebin = (GstEncodeBin *) object;
switch (prop_id) {
case PROP_PROFILE:
g_value_set_object (value, (GObject *) ebin->profile);
break;
case PROP_QUEUE_BUFFERS_MAX:
g_value_set_uint (value, ebin->queue_buffers_max);
break;
case PROP_QUEUE_BYTES_MAX:
g_value_set_uint (value, ebin->queue_bytes_max);
break;
case PROP_QUEUE_TIME_MAX:
g_value_set_uint64 (value, ebin->queue_time_max);
break;
case PROP_AUDIO_JITTER_TOLERANCE:
g_value_set_uint64 (value, ebin->tolerance);
break;
case PROP_AVOID_REENCODING:
g_value_set_boolean (value, ebin->avoid_reencoding);
break;
case PROP_FLAGS:
g_value_set_flags (value, ebin->flags);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static inline gboolean
are_raw_caps (const GstCaps * caps)
{
GstCaps *raw = gst_static_caps_get (&default_raw_caps);
if (gst_caps_can_intersect (caps, raw)) {
gst_caps_unref (raw);
return TRUE;
}
gst_caps_unref (raw);
return FALSE;
}
/* Returns the number of time a given stream profile is currently used
* in encodebin */
static inline guint
stream_profile_used_count (GstEncodeBin * ebin, GstEncodingProfile * sprof)
{
guint nbprofused = 0;
GList *tmp;
for (tmp = ebin->streams; tmp; tmp = tmp->next) {
StreamGroup *sgroup = (StreamGroup *) tmp->data;
if (sgroup->profile == sprof)
nbprofused++;
}
return nbprofused;
}
static inline GstEncodingProfile *
next_unused_stream_profile (GstEncodeBin * ebin, GType ptype, GstCaps * caps)
{
GST_DEBUG_OBJECT (ebin, "ptype:%s, caps:%" GST_PTR_FORMAT,
g_type_name (ptype), caps);
if (G_UNLIKELY (ptype == G_TYPE_NONE && caps != NULL)) {
/* Identify the profile type based on raw caps */
if (gst_caps_can_intersect (ebin->raw_video_caps, caps))
ptype = GST_TYPE_ENCODING_VIDEO_PROFILE;
else if (gst_caps_can_intersect (ebin->raw_audio_caps, caps))
ptype = GST_TYPE_ENCODING_AUDIO_PROFILE;
/* else if (gst_caps_can_intersect (ebin->raw_text_caps, caps)) */
/* ptype = GST_TYPE_ENCODING_TEXT_PROFILE; */
GST_DEBUG_OBJECT (ebin, "Detected profile type as being %s",
g_type_name (ptype));
}
if (GST_IS_ENCODING_CONTAINER_PROFILE (ebin->profile)) {
const GList *tmp;
for (tmp =
gst_encoding_container_profile_get_profiles
(GST_ENCODING_CONTAINER_PROFILE (ebin->profile)); tmp;
tmp = tmp->next) {
GstEncodingProfile *sprof = (GstEncodingProfile *) tmp->data;
/* Pick an available Stream profile for which:
* * either it is of the compatibly raw type,
* * OR we can pass it through directly without encoding
*/
if (G_TYPE_FROM_INSTANCE (sprof) == ptype) {
guint presence = gst_encoding_profile_get_presence (sprof);
GST_DEBUG ("Found a stream profile with the same type");
if ((presence == 0)
|| (presence > stream_profile_used_count (ebin, sprof)))
return sprof;
} else if ((caps != NULL) && (ptype == G_TYPE_NONE)) {
GstCaps *outcaps;
gboolean res;
outcaps = gst_encoding_profile_get_input_caps (sprof);
GST_DEBUG ("Unknown stream, seeing if it's compatible with %"
GST_PTR_FORMAT, outcaps);
res = gst_caps_can_intersect (outcaps, caps);
gst_caps_unref (outcaps);
if (res)
return sprof;
}
}
}
return NULL;
}
static GstPad *
request_pad_for_stream (GstEncodeBin * encodebin, GType ptype,
const gchar * name, GstCaps * caps)
{
StreamGroup *sgroup;
GstEncodingProfile *sprof;
GST_DEBUG_OBJECT (encodebin, "name:%s caps:%" GST_PTR_FORMAT, name, caps);
/* Figure out if we have a unused GstEncodingProfile we can use for
* these caps */
sprof = next_unused_stream_profile (encodebin, ptype, caps);
if (G_UNLIKELY (sprof == NULL))
goto no_stream_profile;
sgroup = _create_stream_group (encodebin, sprof, name, caps);
if (G_UNLIKELY (sgroup == NULL))
goto no_stream_group;
return sgroup->ghostpad;
no_stream_profile:
{
GST_WARNING_OBJECT (encodebin, "Couldn't find a compatible stream profile");
return NULL;
}
no_stream_group:
{
GST_WARNING_OBJECT (encodebin, "Couldn't create a StreamGroup");
return NULL;
}
}
static GstPad *
gst_encode_bin_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps)
{
GstEncodeBin *ebin = (GstEncodeBin *) element;
GstPad *res = NULL;
GST_DEBUG_OBJECT (element, "templ:%s, name:%s", templ->name_template, name);
/* Identify the stream group */
if (caps != NULL) {
res = request_pad_for_stream (ebin, G_TYPE_NONE, name, (GstCaps *) caps);
}
if (res == NULL) {
GType ptype = G_TYPE_NONE;
if (!strcmp (templ->name_template, "video_%u"))
ptype = GST_TYPE_ENCODING_VIDEO_PROFILE;
else if (!strcmp (templ->name_template, "audio_%u"))
ptype = GST_TYPE_ENCODING_AUDIO_PROFILE;
/* else if (!strcmp (templ->name_template, "text_%u")) */
/* ptype = GST_TYPE_ENCODING_TEXT_PROFILE; */
/* FIXME : Check uniqueness of pad */
/* FIXME : Check that the requested number is the last one, and if not,
* update the last_pad_id variable so that we don't create a pad with
* the same name/number in the future */
res = request_pad_for_stream (ebin, ptype, name, NULL);
}
return res;
}
static GstPad *
gst_encode_bin_request_pad_signal (GstEncodeBin * encodebin, GstCaps * caps)
{
GstPad *pad = request_pad_for_stream (encodebin, G_TYPE_NONE, NULL, caps);
return pad ? GST_PAD_CAST (gst_object_ref (pad)) : NULL;
}
static inline StreamGroup *
find_stream_group_from_pad (GstEncodeBin * ebin, GstPad * pad)
{
GList *tmp;
for (tmp = ebin->streams; tmp; tmp = tmp->next) {
StreamGroup *sgroup = (StreamGroup *) tmp->data;
if (G_UNLIKELY (sgroup->ghostpad == pad))
return sgroup;
}
return NULL;
}
static void
gst_encode_bin_release_pad (GstElement * element, GstPad * pad)
{
GstEncodeBin *ebin = (GstEncodeBin *) element;
StreamGroup *sgroup;
/* Find the associated StreamGroup */
sgroup = find_stream_group_from_pad (ebin, pad);
if (G_UNLIKELY (sgroup == NULL))
goto no_stream_group;
/* Release objects/data associated with the StreamGroup */
stream_group_remove (ebin, sgroup);
return;
no_stream_group:
{
GST_WARNING_OBJECT (ebin, "Couldn't find corresponding StreamGroup");
return;
}
}
/* Create a parser for the given stream profile */
static inline GstElement *
_get_parser (GstEncodeBin * ebin, GstEncodingProfile * sprof)
{
GList *parsers1, *parsers, *tmp;
GstElement *parser = NULL;
GstElementFactory *parserfact = NULL;
const GstCaps *format;
format = gst_encoding_profile_get_format (sprof);
GST_DEBUG ("Getting list of parsers for format %" GST_PTR_FORMAT, format);
/* FIXME : requesting twice the parsers twice is a bit ugly, we should
* have a method to request on more than one condition */
parsers1 =
gst_element_factory_list_filter (ebin->parsers, format,
GST_PAD_SRC, FALSE);
parsers =
gst_element_factory_list_filter (parsers1, format, GST_PAD_SINK, FALSE);
gst_plugin_feature_list_free (parsers1);
if (G_UNLIKELY (parsers == NULL)) {
GST_DEBUG ("Couldn't find any compatible parsers");
return NULL;
}
for (tmp = parsers; tmp; tmp = tmp->next) {
/* FIXME : We're only picking the first one so far */
/* FIXME : signal the user if he wants this */
parserfact = (GstElementFactory *) tmp->data;
break;
}
if (parserfact)
parser = gst_element_factory_create (parserfact, NULL);
gst_plugin_feature_list_free (parsers);
return parser;
}
static GstElement *
_create_element_and_set_preset (GstElementFactory * factory,
const gchar * preset, const gchar * name)
{
GstElement *res = NULL;
GST_DEBUG ("Creating element from factory %s", GST_OBJECT_NAME (factory));
res = gst_element_factory_create (factory, name);
if (preset && GST_IS_PRESET (res) &&
!gst_preset_load_preset (GST_PRESET (res), preset)) {
GST_WARNING ("Couldn't set preset [%s] on element [%s]",
preset, GST_OBJECT_NAME (factory));
gst_object_unref (res);
res = NULL;
}
return res;
}
/* Create the encoder for the given stream profile */
static inline GstElement *
_get_encoder (GstEncodeBin * ebin, GstEncodingProfile * sprof)
{
GList *encoders, *tmp;
GstElement *encoder = NULL;
GstElementFactory *encoderfact = NULL;
const GstCaps *format;
const gchar *preset;
format = gst_encoding_profile_get_format (sprof);
preset = gst_encoding_profile_get_preset (sprof);
GST_DEBUG ("Getting list of encoders for format %" GST_PTR_FORMAT, format);
/* If stream caps are raw, return identity */
if (G_UNLIKELY (are_raw_caps (format))) {
GST_DEBUG ("Stream format is raw, returning identity as the encoder");
encoder = gst_element_factory_make ("identity", NULL);
goto beach;
}
encoders =
gst_element_factory_list_filter (ebin->encoders, format,
GST_PAD_SRC, FALSE);
if (G_UNLIKELY (encoders == NULL)) {
GST_DEBUG ("Couldn't find any compatible encoders");
goto beach;
}
for (tmp = encoders; tmp; tmp = tmp->next) {
encoderfact = (GstElementFactory *) tmp->data;
if ((encoder = _create_element_and_set_preset (encoderfact, preset, NULL)))
break;
}
gst_plugin_feature_list_free (encoders);
beach:
return encoder;
}
static GstPad *
local_element_request_pad (GstElement * element, GstPadTemplate * templ,
const gchar * name, const GstCaps * caps)
{
GstPad *newpad = NULL;
GstElementClass *oclass;
oclass = GST_ELEMENT_GET_CLASS (element);
if (oclass->request_new_pad)
newpad = (oclass->request_new_pad) (element, templ, name, caps);
if (newpad)
gst_object_ref (newpad);
return newpad;
}
static GstPad *
gst_element_get_pad_from_template (GstElement * element, GstPadTemplate * templ)
{
GstPad *ret = NULL;
GstPadPresence presence;
/* If this function is ever exported, we need check the validity of `element'
* and `templ', and to make sure the template actually belongs to the
* element. */
presence = GST_PAD_TEMPLATE_PRESENCE (templ);
switch (presence) {
case GST_PAD_ALWAYS:
case GST_PAD_SOMETIMES:
ret = gst_element_get_static_pad (element, templ->name_template);
if (!ret && presence == GST_PAD_ALWAYS)
g_warning
("Element %s has an ALWAYS template %s, but no pad of the same name",
GST_OBJECT_NAME (element), templ->name_template);
break;
case GST_PAD_REQUEST:
ret = gst_element_request_pad (element, templ, NULL, NULL);
break;
}
return ret;
}
/* FIXME : Improve algorithm for finding compatible muxer sink pad */
static inline GstPad *
get_compatible_muxer_sink_pad (GstEncodeBin * ebin, GstElement * encoder,
GstCaps * sinkcaps)
{
GstPad *sinkpad;
GstPadTemplate *srctempl = NULL;
GstPadTemplate *sinktempl;
if (encoder) {
GstPad *srcpad;
srcpad = gst_element_get_static_pad (encoder, "src");
srctempl = gst_pad_get_pad_template (srcpad);
GST_DEBUG_OBJECT (ebin,
"Attempting to find pad from muxer %s compatible with %s:%s",
GST_ELEMENT_NAME (ebin->muxer), GST_DEBUG_PAD_NAME (srcpad));
gst_object_unref (srcpad);
sinktempl = gst_element_get_compatible_pad_template (ebin->muxer, srctempl);
gst_object_unref (srctempl);
} else {
srctempl =
gst_pad_template_new ("whatever", GST_PAD_SRC, GST_PAD_ALWAYS,
sinkcaps);
g_assert (srctempl != NULL);
sinktempl = gst_element_get_compatible_pad_template (ebin->muxer, srctempl);
g_object_unref (srctempl);
}
if (G_UNLIKELY (sinktempl == NULL))
goto no_template;
sinkpad = gst_element_get_pad_from_template (ebin->muxer, sinktempl);
return sinkpad;
no_template:
{
GST_WARNING_OBJECT (ebin, "No compatible pad available on muxer");
return NULL;
}
}
static gboolean
_has_class (GstElement * element, const gchar * classname)
{
GstElementClass *klass;
const gchar *value;
klass = GST_ELEMENT_GET_CLASS (element);
value = gst_element_class_get_metadata (klass, GST_ELEMENT_METADATA_KLASS);
return strstr (value, classname) != NULL;
}
/* FIXME : Add handling of streams that don't need encoding */
/* FIXME : Add handling of streams that don't require conversion elements */
/*
* Create the elements, StreamGroup, add the sink pad, link it to the muxer
*
* sinkpadname: If non-NULL, that name will be assigned to the sink ghost pad
* sinkcaps: If non-NULL will be used to figure out how to setup the group */
static StreamGroup *
_create_stream_group (GstEncodeBin * ebin, GstEncodingProfile * sprof,
const gchar * sinkpadname, GstCaps * sinkcaps)
{
StreamGroup *sgroup = NULL;
GstPad *sinkpad, *srcpad, *muxerpad = NULL;
/* Element we will link to the encoder */
GstElement *last = NULL;
GList *tmp, *tosync = NULL;
GstCaps *format, *restriction;
const gchar *missing_element_name;
format = gst_encoding_profile_get_format (sprof);
restriction = gst_encoding_profile_get_restriction (sprof);
GST_DEBUG ("Creating group. format %" GST_PTR_FORMAT ", for caps %"
GST_PTR_FORMAT, format, sinkcaps);
GST_DEBUG ("avoid_reencoding:%d", ebin->avoid_reencoding);
sgroup = g_slice_new0 (StreamGroup);
sgroup->ebin = ebin;
sgroup->profile = sprof;
/* NOTE for people reading this code:
*
* We construct the group starting by the furthest downstream element
* and making our way up adding/syncing/linking as we go.
*
* There are two parallel paths:
* * One for raw data which goes through converters and encoders
* * One for already encoded data
*/
/* Exception to the rule above:
* We check if we have an available encoder so we can abort early */
/* FIXME : What if we only want to do passthrough ??? */
GST_LOG ("Checking for encoder availability");
sgroup->encoder = _get_encoder (ebin, sprof);
if (G_UNLIKELY (sgroup->encoder == NULL))
goto no_encoder;
/* Muxer.
* If we are handling a container profile, figure out if the muxer has a
* sinkpad compatible with the selected profile */
if (ebin->muxer) {
muxerpad = get_compatible_muxer_sink_pad (ebin, NULL, format);
if (G_UNLIKELY (muxerpad == NULL))
goto no_muxer_pad;
}
/* Output Queue.
* We only use a 1buffer long queue here, the actual queueing will be done
* in the input queue */
last = sgroup->outqueue = gst_element_factory_make ("queue", NULL);
g_object_set (sgroup->outqueue, "max-size-buffers", (guint32) 1,
"max-size-bytes", (guint32) 0, "max-size-time", (guint64) 0,
"silent", TRUE, NULL);
gst_bin_add (GST_BIN (ebin), sgroup->outqueue);
tosync = g_list_append (tosync, sgroup->outqueue);
srcpad = gst_element_get_static_pad (sgroup->outqueue, "src");
if (muxerpad) {
if (G_UNLIKELY (fast_pad_link (srcpad, muxerpad) != GST_PAD_LINK_OK)) {
goto muxer_link_failure;
}
gst_object_unref (muxerpad);
} else {
gst_ghost_pad_set_target (GST_GHOST_PAD (ebin->srcpad), srcpad);
}
gst_object_unref (srcpad);
/* Check if we need a formatter
* If we have no muxer or
* if the muxer isn't a formatter and doesn't implement the tagsetter interface
*/
if (!ebin->muxer || (!GST_IS_TAG_SETTER (ebin->muxer)
&& !_has_class (ebin->muxer, "Formatter"))) {
sgroup->formatter = _get_formatter (ebin, sprof);
if (sgroup->formatter) {
GST_DEBUG ("Adding formatter for %" GST_PTR_FORMAT, format);
gst_bin_add (GST_BIN (ebin), sgroup->formatter);
tosync = g_list_append (tosync, sgroup->formatter);
if (G_UNLIKELY (!fast_element_link (sgroup->formatter, last)))
goto formatter_link_failure;
last = sgroup->formatter;
}
}
/* Output capsfilter
* This will receive the format caps from the streamprofile */
GST_DEBUG ("Adding output capsfilter for %" GST_PTR_FORMAT, format);
sgroup->outfilter = gst_element_factory_make ("capsfilter", NULL);
g_object_set (sgroup->outfilter, "caps", format, NULL);
gst_bin_add (GST_BIN (ebin), sgroup->outfilter);
tosync = g_list_append (tosync, sgroup->outfilter);
if (G_UNLIKELY (!fast_element_link (sgroup->outfilter, last)))
goto outfilter_link_failure;
last = sgroup->outfilter;
sgroup->parser = _get_parser (ebin, sprof);
if (sgroup->parser != NULL) {
GST_DEBUG ("Got a parser %s", GST_ELEMENT_NAME (sgroup->parser));
gst_bin_add (GST_BIN (ebin), sgroup->parser);
tosync = g_list_append (tosync, sgroup->parser);
if (G_UNLIKELY (!gst_element_link (sgroup->parser, last)))
goto parser_link_failure;
last = sgroup->parser;
}
/* Stream combiner */
sgroup->combiner = g_object_new (GST_TYPE_STREAM_COMBINER, NULL);
gst_bin_add (GST_BIN (ebin), sgroup->combiner);
tosync = g_list_append (tosync, sgroup->combiner);
if (G_UNLIKELY (!fast_element_link (sgroup->combiner, last)))
goto combiner_link_failure;
/* Stream splitter */
sgroup->splitter = g_object_new (GST_TYPE_STREAM_SPLITTER, NULL);
gst_bin_add (GST_BIN (ebin), sgroup->splitter);
tosync = g_list_append (tosync, sgroup->splitter);
/* Input queue
* FIXME : figure out what max-size to use for the input queue */
sgroup->inqueue = gst_element_factory_make ("queue", NULL);
g_object_set (sgroup->inqueue, "max-size-buffers",
(guint32) ebin->queue_buffers_max, "max-size-bytes",
(guint32) ebin->queue_bytes_max, "max-size-time",
(guint64) ebin->queue_time_max, "silent", TRUE, NULL);
gst_bin_add (GST_BIN (ebin), sgroup->inqueue);
tosync = g_list_append (tosync, sgroup->inqueue);
if (G_UNLIKELY (!fast_element_link (sgroup->inqueue, sgroup->splitter)))
goto splitter_link_failure;
/* Expose input queue sink pad as ghostpad */
sinkpad = gst_element_get_static_pad (sgroup->inqueue, "sink");
if (sinkpadname == NULL) {
gchar *pname =
g_strdup_printf ("%s_%u", gst_encoding_profile_get_type_nick (sprof),
ebin->last_pad_id++);
GST_DEBUG ("Adding ghost pad %s", pname);
sgroup->ghostpad = gst_ghost_pad_new (pname, sinkpad);
g_free (pname);
} else
sgroup->ghostpad = gst_ghost_pad_new (sinkpadname, sinkpad);
gst_object_unref (sinkpad);
/* Path 1 : Already-encoded data */
sinkpad =
local_element_request_pad (sgroup->combiner, NULL, "passthroughsink",
NULL);
if (G_UNLIKELY (sinkpad == NULL))
goto no_combiner_sinkpad;
if (ebin->avoid_reencoding) {
GstCaps *tmpcaps;
GST_DEBUG ("Asked to use Smart Encoder");
sgroup->smartencoder = g_object_new (GST_TYPE_SMART_ENCODER, NULL);
/* Check if stream format is compatible */
srcpad = gst_element_get_static_pad (sgroup->smartencoder, "src");
tmpcaps = gst_pad_query_caps (srcpad, NULL);
if (!gst_caps_can_intersect (tmpcaps, format)) {
GST_DEBUG ("We don't have a smart encoder for the stream format");
gst_object_unref (sgroup->smartencoder);
sgroup->smartencoder = NULL;
} else {
gst_bin_add ((GstBin *) ebin, sgroup->smartencoder);
fast_pad_link (srcpad, sinkpad);
tosync = g_list_append (tosync, sgroup->smartencoder);
sinkpad = gst_element_get_static_pad (sgroup->smartencoder, "sink");
}
gst_caps_unref (tmpcaps);
g_object_unref (srcpad);
}
srcpad =
local_element_request_pad (sgroup->splitter, NULL, "passthroughsrc",
NULL);
if (G_UNLIKELY (srcpad == NULL))
goto no_splitter_srcpad;
/* Go straight to splitter */
if (G_UNLIKELY (fast_pad_link (srcpad, sinkpad) != GST_PAD_LINK_OK))
goto passthrough_link_failure;
g_object_unref (sinkpad);
g_object_unref (srcpad);
/* Path 2 : Conversion / Encoding */
/* 1. Create the encoder */
GST_LOG ("Adding encoder");
last = sgroup->encoder;
gst_bin_add ((GstBin *) ebin, sgroup->encoder);
tosync = g_list_append (tosync, sgroup->encoder);
sinkpad =
local_element_request_pad (sgroup->combiner, NULL, "encodingsink", NULL);
if (G_UNLIKELY (sinkpad == NULL))
goto no_combiner_sinkpad;
srcpad = gst_element_get_static_pad (sgroup->encoder, "src");
if (G_UNLIKELY (fast_pad_link (srcpad, sinkpad) != GST_PAD_LINK_OK))
goto encoder_link_failure;
g_object_unref (sinkpad);
g_object_unref (srcpad);
/* 3. Create the conversion/restriction elements */
/* 3.1. capsfilter */
if (restriction && !gst_caps_is_any (restriction)) {
GST_LOG ("Adding capsfilter for restriction caps : %" GST_PTR_FORMAT,
restriction);
last = sgroup->capsfilter = gst_element_factory_make ("capsfilter", NULL);
g_object_set (sgroup->capsfilter, "caps", restriction, NULL);
gst_bin_add ((GstBin *) ebin, sgroup->capsfilter);
tosync = g_list_append (tosync, sgroup->capsfilter);
fast_element_link (sgroup->capsfilter, sgroup->encoder);
}
/* 3.2. restriction elements */
/* FIXME : Once we have properties for specific converters, use those */
if (GST_IS_ENCODING_VIDEO_PROFILE (sprof)) {
const gboolean native_video =
! !(ebin->flags & GST_ENC_FLAG_NO_VIDEO_CONVERSION);
GstElement *cspace = NULL, *scale, *vrate, *cspace2 = NULL;
GST_LOG ("Adding conversion elements for video stream");
if (!native_video) {
cspace = gst_element_factory_make ("videoconvert", NULL);
scale = gst_element_factory_make ("videoscale", NULL);
if (!scale) {
missing_element_name = "videoscale";
goto missing_element;
}
/* 4-tap scaling and black borders */
g_object_set (scale, "method", 2, "add-borders", TRUE, NULL);
cspace2 = gst_element_factory_make ("videoconvert", NULL);
if (!cspace || !cspace2) {
missing_element_name = "videoconvert";
goto missing_element;
}
gst_bin_add_many ((GstBin *) ebin, cspace, scale, cspace2, NULL);
tosync = g_list_append (tosync, cspace);
tosync = g_list_append (tosync, scale);
tosync = g_list_append (tosync, cspace2);
sgroup->converters = g_list_prepend (sgroup->converters, cspace);
sgroup->converters = g_list_prepend (sgroup->converters, scale);
sgroup->converters = g_list_prepend (sgroup->converters, cspace2);
if (!fast_element_link (cspace, scale) ||
!fast_element_link (scale, cspace2))
goto converter_link_failure;
}
if (!gst_encoding_video_profile_get_variableframerate
(GST_ENCODING_VIDEO_PROFILE (sprof))) {
vrate = gst_element_factory_make ("videorate", NULL);
if (!vrate) {
missing_element_name = "videorate";
goto missing_element;
}
gst_bin_add ((GstBin *) ebin, vrate);
tosync = g_list_prepend (tosync, vrate);
sgroup->converters = g_list_prepend (sgroup->converters, vrate);
if ((!native_video && !fast_element_link (cspace2, vrate))
|| !fast_element_link (vrate, last))
goto converter_link_failure;
if (!native_video)
last = cspace;
else
last = vrate;
} else if (!native_video) {
if (!fast_element_link (cspace2, last))
goto converter_link_failure;
last = cspace;
}
} else if (GST_IS_ENCODING_AUDIO_PROFILE (sprof)
&& !(ebin->flags & GST_ENC_FLAG_NO_AUDIO_CONVERSION)) {
GstElement *aconv, *ares, *arate, *aconv2;
GST_LOG ("Adding conversion elements for audio stream");
arate = gst_element_factory_make ("audiorate", NULL);
g_object_set (arate, "tolerance", (guint64) ebin->tolerance, NULL);
if (!arate) {
missing_element_name = "audiorate";
goto missing_element;
}
aconv = gst_element_factory_make ("audioconvert", NULL);
aconv2 = gst_element_factory_make ("audioconvert", NULL);
ares = gst_element_factory_make ("audioresample", NULL);
if (!aconv || !aconv2) {
missing_element_name = "audioconvert";
goto missing_element;
}
if (!ares) {
missing_element_name = "audioresample";
goto missing_element;
}
gst_bin_add_many ((GstBin *) ebin, arate, aconv, ares, aconv2, NULL);
tosync = g_list_append (tosync, arate);
tosync = g_list_append (tosync, aconv);
tosync = g_list_append (tosync, ares);
tosync = g_list_append (tosync, aconv2);
if (!fast_element_link (arate, aconv) ||
!fast_element_link (aconv, ares) ||
!fast_element_link (ares, aconv2) || !fast_element_link (aconv2, last))
goto converter_link_failure;
sgroup->converters = g_list_prepend (sgroup->converters, arate);
sgroup->converters = g_list_prepend (sgroup->converters, aconv);
sgroup->converters = g_list_prepend (sgroup->converters, ares);
sgroup->converters = g_list_prepend (sgroup->converters, aconv2);
last = arate;
}
/* Link to stream splitter */
sinkpad = gst_element_get_static_pad (last, "sink");
srcpad =
local_element_request_pad (sgroup->splitter, NULL, "encodingsrc", NULL);
if (G_UNLIKELY (srcpad == NULL))
goto no_splitter_srcpad;
if (G_UNLIKELY (fast_pad_link (srcpad, sinkpad) != GST_PAD_LINK_OK))
goto splitter_encoding_failure;
g_object_unref (sinkpad);
g_object_unref (srcpad);
/* End of Stream 2 setup */
/* Sync all elements to parent state */
for (tmp = tosync; tmp; tmp = tmp->next)
gst_element_sync_state_with_parent ((GstElement *) tmp->data);
g_list_free (tosync);
/* Add ghostpad */
GST_DEBUG ("Adding ghostpad %s:%s", GST_DEBUG_PAD_NAME (sgroup->ghostpad));
gst_pad_set_active (sgroup->ghostpad, TRUE);
gst_element_add_pad ((GstElement *) ebin, sgroup->ghostpad);
/* Add StreamGroup to our list of streams */
GST_DEBUG
("Done creating elements, adding StreamGroup to our controlled stream list");
ebin->streams = g_list_prepend (ebin->streams, sgroup);
if (format)
gst_caps_unref (format);
if (restriction)
gst_caps_unref (restriction);
return sgroup;
splitter_encoding_failure:
GST_ERROR_OBJECT (ebin, "Error linking splitter to encoding stream");
goto cleanup;
no_encoder:
GST_ERROR_OBJECT (ebin, "Couldn't create encoder for format %" GST_PTR_FORMAT,
format);
/* missing plugin support */
gst_element_post_message (GST_ELEMENT_CAST (ebin),
gst_missing_encoder_message_new (GST_ELEMENT_CAST (ebin), format));
GST_ELEMENT_ERROR (ebin, CORE, MISSING_PLUGIN, (NULL),
("Couldn't create encoder for format %" GST_PTR_FORMAT, format));
goto cleanup;
no_muxer_pad:
GST_ERROR_OBJECT (ebin,
"Couldn't find a compatible muxer pad to link encoder to");
goto cleanup;
missing_element:
gst_element_post_message (GST_ELEMENT_CAST (ebin),
gst_missing_element_message_new (GST_ELEMENT_CAST (ebin),
missing_element_name));
GST_ELEMENT_ERROR (ebin, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
missing_element_name), (NULL));
goto cleanup;
encoder_link_failure:
GST_ERROR_OBJECT (ebin, "Failed to link the encoder");
goto cleanup;
muxer_link_failure:
GST_ERROR_OBJECT (ebin, "Couldn't link encoder to muxer");
goto cleanup;
formatter_link_failure:
GST_ERROR_OBJECT (ebin, "Couldn't link output filter to output queue");
goto cleanup;
outfilter_link_failure:
GST_ERROR_OBJECT (ebin,
"Couldn't link output filter to output queue/formatter");
goto cleanup;
passthrough_link_failure:
GST_ERROR_OBJECT (ebin, "Failed linking splitter in passthrough mode");
goto cleanup;
no_splitter_srcpad:
GST_ERROR_OBJECT (ebin, "Couldn't get a source pad from the splitter");
goto cleanup;
no_combiner_sinkpad:
GST_ERROR_OBJECT (ebin, "Couldn't get a sink pad from the combiner");
goto cleanup;
splitter_link_failure:
GST_ERROR_OBJECT (ebin, "Failure linking to the splitter");
goto cleanup;
combiner_link_failure:
GST_ERROR_OBJECT (ebin, "Failure linking to the combiner");
goto cleanup;
parser_link_failure:
GST_ERROR_OBJECT (ebin, "Failure linking the parser");
goto cleanup;
converter_link_failure:
GST_ERROR_OBJECT (ebin, "Failure linking the video converters");
goto cleanup;
cleanup:
/* FIXME : Actually properly cleanup everything */
if (format)
gst_caps_unref (format);
if (restriction)
gst_caps_unref (restriction);
g_slice_free (StreamGroup, sgroup);
return NULL;
}
static gboolean
_gst_caps_match_foreach (GQuark field_id, const GValue * value, gpointer data)
{
GstStructure *structure = data;
const GValue *other_value = gst_structure_id_get_value (structure, field_id);
if (G_UNLIKELY (other_value == NULL))
return FALSE;
if (gst_value_compare (value, other_value) == GST_VALUE_EQUAL) {
return TRUE;
}
return FALSE;
}
/*
* checks that there is at least one structure on caps_a that has
* all its fields exactly the same as one structure on caps_b
*/
static gboolean
_gst_caps_match (const GstCaps * caps_a, const GstCaps * caps_b)
{
gint i, j;
gboolean res = FALSE;
for (i = 0; i < gst_caps_get_size (caps_a); i++) {
GstStructure *structure_a = gst_caps_get_structure (caps_a, i);
for (j = 0; j < gst_caps_get_size (caps_b); j++) {
GstStructure *structure_b = gst_caps_get_structure (caps_b, j);
res = gst_structure_foreach (structure_a, _gst_caps_match_foreach,
structure_b);
if (res)
goto end;
}
}
end:
return res;
}
static gboolean
_factory_can_handle_caps (GstElementFactory * factory, const GstCaps * caps,
GstPadDirection dir, gboolean exact)
{
GList *templates = factory->staticpadtemplates;
while (templates) {
GstStaticPadTemplate *template = (GstStaticPadTemplate *) templates->data;
if (template->direction == dir) {
GstCaps *tmp = gst_static_caps_get (&template->static_caps);
if ((exact && _gst_caps_match (caps, tmp)) ||
(!exact && gst_caps_can_intersect (tmp, caps))) {
gst_caps_unref (tmp);
return TRUE;
}
gst_caps_unref (tmp);
}
templates = g_list_next (templates);
}
return FALSE;
}
static inline GstElement *
_get_formatter (GstEncodeBin * ebin, GstEncodingProfile * sprof)
{
GList *formatters, *tmpfmtr;
GstElement *formatter = NULL;
GstElementFactory *formatterfact = NULL;
const GstCaps *format;
const gchar *preset;
format = gst_encoding_profile_get_format (sprof);
preset = gst_encoding_profile_get_preset (sprof);
GST_DEBUG ("Getting list of formatters for format %" GST_PTR_FORMAT, format);
formatters =
gst_element_factory_list_filter (ebin->formatters, format, GST_PAD_SRC,
FALSE);
if (formatters == NULL)
goto beach;
/* FIXME : signal the user if he wants this */
for (tmpfmtr = formatters; tmpfmtr; tmpfmtr = tmpfmtr->next) {
formatterfact = (GstElementFactory *) tmpfmtr->data;
GST_DEBUG_OBJECT (ebin, "Trying formatter %s",
GST_OBJECT_NAME (formatterfact));
if ((formatter =
_create_element_and_set_preset (formatterfact, preset, NULL)))
break;
}
gst_plugin_feature_list_free (formatters);
beach:
return formatter;
}
static gint
compare_elements (gconstpointer a, gconstpointer b, gpointer udata)
{
GstCaps *caps = udata;
GstElementFactory *fac_a = (GstElementFactory *) a;
GstElementFactory *fac_b = (GstElementFactory *) b;
/* FIXME not quite sure this is the best algorithm to order the elements
* Some caps similarity comparison algorithm would fit better than going
* boolean (equals/not equals).
*/
gboolean equals_a = _factory_can_handle_caps (fac_a, caps, GST_PAD_SRC, TRUE);
gboolean equals_b = _factory_can_handle_caps (fac_b, caps, GST_PAD_SRC, TRUE);
if (equals_a == equals_b) {
return gst_plugin_feature_get_rank ((GstPluginFeature *) fac_b) -
gst_plugin_feature_get_rank ((GstPluginFeature *) fac_a);
} else if (equals_a) {
return -1;
} else if (equals_b) {
return 1;
}
return 0;
}
static inline GstElement *
_get_muxer (GstEncodeBin * ebin)
{
GList *muxers, *formatters, *tmpmux;
GstElement *muxer = NULL;
GstElementFactory *muxerfact = NULL;
const GList *tmp;
const GstCaps *format;
const gchar *preset;
format = gst_encoding_profile_get_format (ebin->profile);
preset = gst_encoding_profile_get_preset (ebin->profile);
GST_DEBUG ("Getting list of muxers for format %" GST_PTR_FORMAT, format);
muxers =
gst_element_factory_list_filter (ebin->muxers, format, GST_PAD_SRC, TRUE);
formatters =
gst_element_factory_list_filter (ebin->formatters, format, GST_PAD_SRC,
TRUE);
muxers = g_list_sort_with_data (muxers, compare_elements, (gpointer) format);
formatters =
g_list_sort_with_data (formatters, compare_elements, (gpointer) format);
muxers = g_list_concat (muxers, formatters);
if (muxers == NULL)
goto beach;
/* FIXME : signal the user if he wants this */
for (tmpmux = muxers; tmpmux; tmpmux = tmpmux->next) {
gboolean cansinkstreams = TRUE;
const GList *profiles =
gst_encoding_container_profile_get_profiles
(GST_ENCODING_CONTAINER_PROFILE (ebin->profile));
muxerfact = (GstElementFactory *) tmpmux->data;
GST_DEBUG ("Trying muxer %s", GST_OBJECT_NAME (muxerfact));
/* See if the muxer can sink all of our stream profile caps */
for (tmp = profiles; tmp; tmp = tmp->next) {
GstEncodingProfile *sprof = (GstEncodingProfile *) tmp->data;
if (!_factory_can_handle_caps (muxerfact,
gst_encoding_profile_get_format (sprof), GST_PAD_SINK, FALSE)) {
GST_DEBUG ("Skipping muxer because it can't sink caps %"
GST_PTR_FORMAT, gst_encoding_profile_get_format (sprof));
cansinkstreams = FALSE;
break;
}
}
/* Only use a muxer than can use all streams and than can accept the
* preset (which may be present or not) */
if (cansinkstreams && (muxer =
_create_element_and_set_preset (muxerfact, preset, "muxer")))
break;
}
gst_plugin_feature_list_free (muxers);
beach:
return muxer;
}
static gboolean
create_elements_and_pads (GstEncodeBin * ebin)
{
gboolean ret = TRUE;
GstElement *muxer = NULL;
GstPad *muxerpad;
const GList *tmp, *profiles;
GstEncodingProfile *sprof;
GST_DEBUG ("Current profile : %s",
gst_encoding_profile_get_name (ebin->profile));
if (GST_IS_ENCODING_CONTAINER_PROFILE (ebin->profile)) {
/* 1. Get the compatible muxer */
muxer = _get_muxer (ebin);
if (G_UNLIKELY (muxer == NULL))
goto no_muxer;
/* Record the muxer */
ebin->muxer = muxer;
gst_bin_add ((GstBin *) ebin, muxer);
/* 2. Ghost the muxer source pad */
/* FIXME : We should figure out if it's a static/request/dyamic pad,
* but for the time being let's assume it's a static pad :) */
muxerpad = gst_element_get_static_pad (muxer, "src");
if (G_UNLIKELY (muxerpad == NULL))
goto no_muxer_pad;
if (!gst_ghost_pad_set_target (GST_GHOST_PAD (ebin->srcpad), muxerpad))
goto no_muxer_ghost_pad;
gst_object_unref (muxerpad);
/* 3. Activate fixed presence streams */
profiles =
gst_encoding_container_profile_get_profiles
(GST_ENCODING_CONTAINER_PROFILE (ebin->profile));
for (tmp = profiles; tmp; tmp = tmp->next) {
sprof = (GstEncodingProfile *) tmp->data;
GST_DEBUG ("Trying stream profile with presence %d",
gst_encoding_profile_get_presence (sprof));
if (gst_encoding_profile_get_presence (sprof) != 0) {
if (G_UNLIKELY (_create_stream_group (ebin, sprof, NULL, NULL) == NULL))
goto stream_error;
}
}
} else {
if (G_UNLIKELY (_create_stream_group (ebin, ebin->profile, NULL,
NULL) == NULL))
goto stream_error;
}
return ret;
no_muxer:
{
GST_WARNING ("No available muxer for %" GST_PTR_FORMAT,
gst_encoding_profile_get_format (ebin->profile));
/* missing plugin support */
gst_element_post_message (GST_ELEMENT_CAST (ebin),
gst_missing_encoder_message_new (GST_ELEMENT_CAST (ebin),
gst_encoding_profile_get_format (ebin->profile)));
GST_ELEMENT_ERROR (ebin, CORE, MISSING_PLUGIN, (NULL),
("No available muxer for format %" GST_PTR_FORMAT,
gst_encoding_profile_get_format (ebin->profile)));
return FALSE;
}
no_muxer_pad:
{
GST_WARNING ("Can't get source pad from muxer (%s)",
GST_ELEMENT_NAME (muxer));
gst_bin_remove (GST_BIN (ebin), muxer);
return FALSE;
}
no_muxer_ghost_pad:
{
GST_WARNING ("Couldn't set %s:%s as source ghostpad target",
GST_DEBUG_PAD_NAME (muxerpad));
gst_bin_remove (GST_BIN (ebin), muxer);
gst_object_unref (muxerpad);
return FALSE;
}
stream_error:
{
GST_WARNING ("Could not create Streams");
if (muxer)
gst_bin_remove (GST_BIN (ebin), muxer);
ebin->muxer = NULL;
return FALSE;
}
}
static void
release_pads (const GValue * item, GstElement * elt)
{
GstPad *pad = g_value_get_object (item);
GstPad *peer = NULL;
GST_DEBUG_OBJECT (elt, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
/* Unlink from its peer pad */
if ((peer = gst_pad_get_peer (pad))) {
if (GST_PAD_DIRECTION (peer) == GST_PAD_SRC)
gst_pad_unlink (peer, pad);
else
gst_pad_unlink (pad, peer);
gst_object_unref (peer);
}
/* Release it from the object */
gst_element_release_request_pad (elt, pad);
}
static void inline
stream_group_free (GstEncodeBin * ebin, StreamGroup * sgroup)
{
GList *tmp;
GstPad *tmppad;
GstPad *pad;
GST_DEBUG_OBJECT (ebin, "Freeing StreamGroup %p", sgroup);
if (ebin->muxer) {
/* outqueue - Muxer */
tmppad = gst_element_get_static_pad (sgroup->outqueue, "src");
pad = gst_pad_get_peer (tmppad);
/* Remove muxer request sink pad */
gst_pad_unlink (tmppad, pad);
gst_element_release_request_pad (ebin->muxer, pad);
gst_object_unref (tmppad);
gst_object_unref (pad);
}
if (sgroup->outqueue)
gst_element_set_state (sgroup->outqueue, GST_STATE_NULL);
if (sgroup->formatter) {
/* capsfilter - formatter - outqueue */
gst_element_set_state (sgroup->formatter, GST_STATE_NULL);
gst_element_set_state (sgroup->outfilter, GST_STATE_NULL);
gst_element_unlink (sgroup->formatter, sgroup->outqueue);
gst_element_unlink (sgroup->outfilter, sgroup->formatter);
} else {
/* Capsfilter - outqueue */
gst_element_set_state (sgroup->outfilter, GST_STATE_NULL);
gst_element_unlink (sgroup->outfilter, sgroup->outqueue);
}
gst_element_set_state (sgroup->outqueue, GST_STATE_NULL);
gst_bin_remove (GST_BIN (ebin), sgroup->outqueue);
/* streamcombiner - parser - capsfilter */
if (sgroup->parser) {
gst_element_set_state (sgroup->parser, GST_STATE_NULL);
gst_element_unlink (sgroup->parser, sgroup->outfilter);
gst_element_unlink (sgroup->combiner, sgroup->parser);
gst_bin_remove ((GstBin *) ebin, sgroup->parser);
}
/* Sink Ghostpad */
if (sgroup->ghostpad)
gst_element_remove_pad (GST_ELEMENT_CAST (ebin), sgroup->ghostpad);
if (sgroup->inqueue)
gst_element_set_state (sgroup->inqueue, GST_STATE_NULL);
if (sgroup->encoder)
gst_element_set_state (sgroup->encoder, GST_STATE_NULL);
if (sgroup->outfilter)
gst_element_set_state (sgroup->outfilter, GST_STATE_NULL);
if (sgroup->smartencoder)
gst_element_set_state (sgroup->smartencoder, GST_STATE_NULL);
if (sgroup->capsfilter) {
gst_element_set_state (sgroup->capsfilter, GST_STATE_NULL);
gst_element_unlink (sgroup->capsfilter, sgroup->encoder);
gst_bin_remove ((GstBin *) ebin, sgroup->capsfilter);
}
for (tmp = sgroup->converters; tmp; tmp = tmp->next) {
GstElement *elt = (GstElement *) tmp->data;
gst_element_set_state (elt, GST_STATE_NULL);
gst_bin_remove ((GstBin *) ebin, elt);
}
if (sgroup->converters)
g_list_free (sgroup->converters);
if (sgroup->combiner) {
GstIterator *it = gst_element_iterate_sink_pads (sgroup->combiner);
GstIteratorResult itret = GST_ITERATOR_OK;
while (itret == GST_ITERATOR_OK || itret == GST_ITERATOR_RESYNC) {
itret =
gst_iterator_foreach (it, (GstIteratorForeachFunction) release_pads,
sgroup->combiner);
gst_iterator_resync (it);
}
gst_iterator_free (it);
gst_element_set_state (sgroup->combiner, GST_STATE_NULL);
gst_bin_remove ((GstBin *) ebin, sgroup->combiner);
}
if (sgroup->splitter) {
GstIterator *it = gst_element_iterate_src_pads (sgroup->splitter);
GstIteratorResult itret = GST_ITERATOR_OK;
while (itret == GST_ITERATOR_OK || itret == GST_ITERATOR_RESYNC) {
itret =
gst_iterator_foreach (it, (GstIteratorForeachFunction) release_pads,
sgroup->splitter);
gst_iterator_resync (it);
}
gst_iterator_free (it);
gst_element_set_state (sgroup->splitter, GST_STATE_NULL);
gst_bin_remove ((GstBin *) ebin, sgroup->splitter);
}
if (sgroup->inqueue)
gst_bin_remove ((GstBin *) ebin, sgroup->inqueue);
if (sgroup->encoder)
gst_bin_remove ((GstBin *) ebin, sgroup->encoder);
if (sgroup->smartencoder)
gst_bin_remove ((GstBin *) ebin, sgroup->smartencoder);
if (sgroup->outfilter)
gst_bin_remove ((GstBin *) ebin, sgroup->outfilter);
g_slice_free (StreamGroup, sgroup);
}
static void
stream_group_remove (GstEncodeBin * ebin, StreamGroup * sgroup)
{
ebin->streams = g_list_remove (ebin->streams, sgroup);
stream_group_free (ebin, sgroup);
}
static void
gst_encode_bin_tear_down_profile (GstEncodeBin * ebin)
{
if (G_UNLIKELY (ebin->profile == NULL))
return;
GST_DEBUG ("Tearing down profile %s",
gst_encoding_profile_get_name (ebin->profile));
while (ebin->streams)
stream_group_remove (ebin, (StreamGroup *) ebin->streams->data);
/* Set ghostpad target to NULL */
gst_ghost_pad_set_target (GST_GHOST_PAD (ebin->srcpad), NULL);
/* Remove muxer if present */
if (ebin->muxer) {
gst_element_set_state (ebin->muxer, GST_STATE_NULL);
gst_bin_remove (GST_BIN (ebin), ebin->muxer);
ebin->muxer = NULL;
}
/* free/clear profile */
gst_encoding_profile_unref (ebin->profile);
ebin->profile = NULL;
}
static gboolean
gst_encode_bin_setup_profile (GstEncodeBin * ebin, GstEncodingProfile * profile)
{
gboolean res;
g_return_val_if_fail (ebin->profile == NULL, FALSE);
GST_DEBUG ("Setting up profile %s (type:%s)",
gst_encoding_profile_get_name (profile),
gst_encoding_profile_get_type_nick (profile));
ebin->profile = profile;
gst_mini_object_ref ((GstMiniObject *) ebin->profile);
/* Create elements */
res = create_elements_and_pads (ebin);
if (res == FALSE)
gst_encode_bin_tear_down_profile (ebin);
return res;
}
static gboolean
gst_encode_bin_set_profile (GstEncodeBin * ebin, GstEncodingProfile * profile)
{
g_return_val_if_fail (GST_IS_ENCODING_PROFILE (profile), FALSE);
GST_DEBUG_OBJECT (ebin, "profile : %s",
gst_encoding_profile_get_name (profile));
if (G_UNLIKELY (ebin->active)) {
GST_WARNING_OBJECT (ebin, "Element already active, can't change profile");
return FALSE;
}
/* If we're not active, we can deactivate the previous profile */
if (ebin->profile) {
gst_encode_bin_tear_down_profile (ebin);
}
return gst_encode_bin_setup_profile (ebin, profile);
}
static inline gboolean
gst_encode_bin_activate (GstEncodeBin * ebin)
{
ebin->active = ebin->profile != NULL;
return ebin->active;
}
static void
gst_encode_bin_deactivate (GstEncodeBin * ebin)
{
ebin->active = FALSE;
}
static GstStateChangeReturn
gst_encode_bin_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstEncodeBin *ebin = (GstEncodeBin *) element;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
if (!gst_encode_bin_activate (ebin)) {
ret = GST_STATE_CHANGE_FAILURE;
goto beach;
}
break;
default:
break;
}
ret =
GST_ELEMENT_CLASS (gst_encode_bin_parent_class)->change_state (element,
transition);
if (ret == GST_STATE_CHANGE_FAILURE)
goto beach;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_encode_bin_deactivate (ebin);
break;
default:
break;
}
beach:
return ret;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
gboolean res;
GST_DEBUG_CATEGORY_INIT (gst_encode_bin_debug, "encodebin", 0, "encoder bin");
#ifdef ENABLE_NLS
GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE,
LOCALEDIR);
bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
#endif /* ENABLE_NLS */
res = gst_element_register (plugin, "encodebin", GST_RANK_NONE,
GST_TYPE_ENCODE_BIN);
return res;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"encoding",
"various encoding-related elements", plugin_init, VERSION, GST_LICENSE,
GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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