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231 lines
7.3 KiB
C
231 lines
7.3 KiB
C
/* GStreamer encoding profiles library
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* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
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* (C) 2009 Nokia Corporation
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_PROFILE_H__
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#define __GST_PROFILE_H__
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#include <gst/gst.h>
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typedef enum {
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GST_ENCODING_PROFILE_UNKNOWN,
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GST_ENCODING_PROFILE_VIDEO,
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GST_ENCODING_PROFILE_AUDIO,
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GST_ENCODING_PROFILE_TEXT
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/* Room for extenstion */
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} GstEncodingProfileType;
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typedef struct _GstEncodingTarget GstEncodingTarget;
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typedef struct _GstEncodingProfile GstEncodingProfile;
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typedef struct _GstStreamEncodingProfile GstStreamEncodingProfile;
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typedef struct _GstVideoEncodingProfile GstVideoEncodingProfile;
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/* FIXME/UNKNOWNS
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*
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* Should encoding categories be well-known strings/quarks ?
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*
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*/
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/**
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* GstEncodingTarget:
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* @name: The name of the target profile.
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* @category: The target category (device, service, use-case).
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* @profiles: A list of #GstProfile this device supports.
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*
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*/
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struct _GstEncodingTarget {
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gchar *name;
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gchar *category;
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GList *profiles;
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}
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/**
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* GstEncodingProfile:
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* @name: The name of the profile
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* @format: The GStreamer mime type corresponding to the muxing format.
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* @preset: The name of the #GstPreset(s) to be used on the muxer. This is optional.
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* @multipass: Whether this profile is a multi-pass profile or not.
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* @encodingprofiles: A list of #GstStreamEncodingProfile for the various streams.
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*
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*/
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struct _GstEncodingProfile {
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gchar *name;
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gchar *format;
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gchar *preset;
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gboolean multipass;
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GList *encodingprofiles;
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};
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/**
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* GstStreamEncodingProfile:
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* @type: Type of profile
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* @format: The GStreamer mime type corresponding to the encoding format.
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* @preset: The name of the #GstPreset to be used on the encoder. This is optional.
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* @restriction: The #GstCaps restricting the input. This is optional.
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* @presence: The number of streams that can be created. 0 => any.
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*/
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struct _GstStreamEncodingProfile {
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GstEncodingProfileType type;
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gchar *format;
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gchar *preset;
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GstCaps *restriction;
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guint presence;
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};
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/**
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* GstVideoEncodingProfile:
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* @profile: common #GstEncodingProfile part.
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* @pass: The pass number if this is part of a multi-pass profile. Starts at 1
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* for multi-pass. Set to 0 if this is not part of a multi-pass profile.
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* @variable_framerate: Do not enforce framerate on incoming raw stream. Default
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* is FALSE.
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*/
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struct _GstVideoEncodingProfile {
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GstStreamEncodingProfile profile;
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guint pass;
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gboolean variable_framerate;
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};
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/* Generic helper API */
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/**
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* gst_encoding_category_list_target:
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* @category: a profile target category name. Can be NULL.
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*
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* Returns the list of all available #GstProfileTarget for the given @category.
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* If @category is #NULL, then all available #GstProfileTarget are returned.
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*/
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GList *gst_encoding_category_list_target (gchar *category);
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/**
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* list available profile target categories
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*/
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GList *gst_profile_list_target_categories ();
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gboolean gst_profile_target_save (GstProfileTarget *target);
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/**
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* gst_encoding_profile_get_input_caps:
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* @profile: a #GstEncodingProfile
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*
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* Returns: the list of all caps the profile can accept. Caller must call
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* gst_cap_unref on all unwanted caps once it is done with the list.
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*/
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GList * gst_profile_get_input_caps (GstEncodingProfile *profile);
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/*
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* Application convenience methods (possibly to be added in gst-pb-utils)
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*/
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/**
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* gst_pb_utils_create_encoder:
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* @caps: The #GstCaps corresponding to a codec format
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* @preset: The name of a preset
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* @name: The name to give to the returned instance, can be #NULL.
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*
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* Creates an encoder which can output the given @caps. If several encoders can
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* output the given @caps, then the one with the highest rank will be picked.
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* If a @preset is specified, it will be applied to the created encoder before
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* returning it.
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* If a @preset is specified, then the highest-ranked encoder that can accept
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* the givein preset will be returned.
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*
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* Returns: The encoder instance with the preset applied if it is available.
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* #NULL if no encoder is available.
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*/
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GstElement *gst_pb_utils_create_encoder(GstCaps *caps, gchar *preset, gchar *name);
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/**
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* gst_pb_utils_create_encoder_format:
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*
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* Convenience version of @gst_pb_utils_create_encoder except one does not need
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* to create a #GstCaps.
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*/
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GstElement *gst_pb_utils_create_encoder_format(gchar *format, gchar *preset,
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gchar *name);
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/**
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* gst_pb_utils_create_muxer:
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* @caps: The #GstCaps corresponding to a codec format
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* @preset: The name of a preset
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*
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* Creates an muxer which can output the given @caps. If several muxers can
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* output the given @caps, then the one with the highest rank will be picked.
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* If a @preset is specified, it will be applied to the created muxer before
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* returning it.
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* If a @preset is specified, then the highest-ranked muxer that can accept
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* the givein preset will be returned.
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*
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* Returns: The muxer instance with the preset applied if it is available.
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* #NULL if no muxer is available.
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*/
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GstElement *gst_pb_utils_create_muxer(GstCaps *caps, gchar *preset);
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/**
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* gst_pb_utils_create_muxer_format:
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*
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* Convenience version of @gst_pb_utils_create_muxer except one does not need
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* to create a #GstCaps.
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*/
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GstElement *gst_pb_utils_create_muxer_format(gchar *format, gchar *preset,
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gchar *name);
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/**
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* gst_pb_utils_encoders_compatible_with_muxer:
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* @muxer: a muxer instance
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*
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* Finds a list of available encoders whose output can be fed to the given
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* @muxer.
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*
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* Returns: A list of compatible encoders, or #NULL if none can be found.
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*/
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GList *gst_pb_utils_encoders_compatible_with_muxer(GstElement *muxer);
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GList *gst_pb_utils_muxers_compatible_with_encoder(GstElement *encoder);
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/*
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* GstPreset modifications
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*/
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/**
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* gst_preset_create:
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* @preset: The #GstPreset on which to create the preset
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* @name: A name for the preset
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* @properties: The properties
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*
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* Creates a new preset with the given properties. This preset will only
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* exist during the lifetime of the process.
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* If you wish to use it after the lifetime of the process, you must call
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* @gst_preset_save_preset.
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*
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* Returns: #TRUE if the preset could be created, else #FALSE.
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*/
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gboolean gst_preset_create (GstPreset *preset, gchar *name,
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GstStructure *properties);
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/**
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* gst_preset_reset:
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* @preset: a #GstPreset
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*
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* Sets all the properties of the element back to their default values.
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*/
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/* FIXME : This could actually be put at the GstObject level, or maybe even
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* at the GObject level. */
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void gst_preset_reset (GstPreset *preset);
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#endif /* __GST_PROFILE_H__ */
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