/*
 * GStreamer
 * Copyright (C) 2009 Julien Isorce <julien.isorce@gmail.com>
 *
 * 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., 51 Franklin St, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#ifndef __GST_GL_MIXER_H__
#define __GST_GL_MIXER_H__

#include <gst/gst.h>
#include <gst/video/video.h>
#include <gst/gl/gl.h>
#include "gstglbasemixer.h"

G_BEGIN_DECLS

typedef struct _GstGLMixer GstGLMixer;
typedef struct _GstGLMixerClass GstGLMixerClass;
typedef struct _GstGLMixerPrivate GstGLMixerPrivate;
typedef struct _GstGLMixerFrameData GstGLMixerFrameData;

#define GST_TYPE_GL_MIXER_PAD (gst_gl_mixer_pad_get_type())
#define GST_GL_MIXER_PAD(obj) \
        (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GL_MIXER_PAD, GstGLMixerPad))
#define GST_GL_MIXER_PAD_CLASS(klass) \
        (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GL_MIXER_PAD, GstGLMixerPadClass))
#define GST_IS_GL_MIXER_PAD(obj) \
        (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GL_MIXER_PAD))
#define GST_IS_GL_MIXER_PAD_CLASS(klass) \
        (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GL_MIXER_PAD))
#define GST_GL_MIXER_PAD_GET_CLASS(obj) \
        (G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_GL_MIXER_PAD,GstGLMixerPadClass))

typedef struct _GstGLMixerPad GstGLMixerPad;
typedef struct _GstGLMixerPadClass GstGLMixerPadClass;

/* all information needed for one video stream */
struct _GstGLMixerPad
{
  GstGLBaseMixerPad parent;                /* subclass the pad */

  /* <private> */
  GstGLUpload *upload;
  GstGLColorConvert *convert;
  GstBuffer *gl_buffer;
};

struct _GstGLMixerPadClass
{
  GstGLBaseMixerPadClass parent_class;

  GstBuffer * (*upload_buffer) (GstGLMixer * mix, GstGLMixerFrameData * frame, GstBuffer * buffer);
};

GType gst_gl_mixer_pad_get_type (void);

#define GST_TYPE_GL_MIXER (gst_gl_mixer_get_type())
#define GST_GL_MIXER(obj) \
        (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GL_MIXER, GstGLMixer))
#define GST_GL_MIXER_CLASS(klass) \
        (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GL_MIXER, GstGLMixerClass))
#define GST_IS_GL_MIXER(obj) \
        (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GL_MIXER))
#define GST_IS_GL_MIXER_CLASS(klass) \
        (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GL_MIXER))
#define GST_GL_MIXER_GET_CLASS(obj) \
        (G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_GL_MIXER,GstGLMixerClass))

typedef gboolean (*GstGLMixerSetCaps) (GstGLMixer* mixer,
  GstCaps* outcaps);
typedef void (*GstGLMixerReset) (GstGLMixer *mixer);
typedef gboolean (*GstGLMixerProcessFunc) (GstGLMixer *mix,
  GPtrArray *buffers, GstBuffer *outbuf);
typedef gboolean (*GstGLMixerProcessTextures) (GstGLMixer *mix,
  GPtrArray *frames, guint out_tex);

struct _GstGLMixer
{
  GstGLBaseMixer vaggregator;

  /* FIXME remove */
  GstGLContext      *context;

  GPtrArray *array_buffers;
  GPtrArray *frames;

  GLuint out_tex_id;
  GstGLDownload *download;

  GLuint fbo;
  GLuint depthbuffer;

  GstCaps *out_caps;

  GstGLMixerPrivate *priv;
};

struct _GstGLMixerClass
{
  GstGLBaseMixerClass parent_class;
  GstGLAPI supported_gl_api;

  GstGLMixerSetCaps set_caps;
  GstGLMixerReset reset;
  GstGLMixerProcessFunc process_buffers;
  GstGLMixerProcessTextures process_textures;
};

struct _GstGLMixerFrameData
{
  GstGLMixerPad *pad;
  guint texture;
};

GType gst_gl_mixer_get_type(void);

gboolean gst_gl_mixer_process_textures (GstGLMixer * mix, GstBuffer * outbuf);
GstCaps * gst_gl_mixer_update_caps (GstGLMixer * mix, GstCaps * caps);

G_END_DECLS
#endif /* __GST_GL_MIXER_H__ */