sys/v4l2codecs/gstv4l2decoder.h

   1 /* GStreamer
   2  * Copyright (C) 2020 Nicolas Dufresne <nicolas.dufresne@collabora.com>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
  17  * Boston, MA 02110-1301, USA.
  18  */
  19
  20 #ifndef __GST_V4L2_DECODER_H__
  21 #define __GST_V4L2_DECODER_H__
  22
  23 #include <gst/gst.h>
  24 #include <gst/video/video.h>
  25
  26 #include "gstv4l2codecdevice.h"
  27 #include "linux/videodev2.h"
  28
  29 G_BEGIN_DECLS
  30
  31 #define GST_TYPE_V4L2_DECODER gst_v4l2_decoder_get_type ()
  32 G_DECLARE_FINAL_TYPE (GstV4l2Decoder, gst_v4l2_decoder, GST, V4L2_DECODER, GstObject);
  33
  34 typedef struct _GstV4l2Request GstV4l2Request;
  35
  36 GstV4l2Decoder *  gst_v4l2_decoder_new (GstV4l2CodecDevice * device);
  37
  38 gboolean          gst_v4l2_decoder_open (GstV4l2Decoder * decoder);
  39
  40 gboolean          gst_v4l2_decoder_close (GstV4l2Decoder * decoder);
  41
  42 gboolean          gst_v4l2_decoder_streamon (GstV4l2Decoder * self,
  43                                              GstPadDirection direction);
  44
  45 gboolean          gst_v4l2_decoder_streamoff (GstV4l2Decoder * self,
  46                                               GstPadDirection direction);
  47
  48 gboolean          gst_v4l2_decoder_enum_sink_fmt (GstV4l2Decoder * self,
  49                                                   gint i, guint32 * out_fmt);
  50
  51 gboolean          gst_v4l2_decoder_set_sink_fmt (GstV4l2Decoder * self, guint32 fmt,
  52                                                  gint width, gint height);
  53
  54 GstCaps *         gst_v4l2_decoder_enum_src_formats (GstV4l2Decoder * self);
  55
  56 gboolean          gst_v4l2_decoder_select_src_format (GstV4l2Decoder * self,
  57                                                       GstCaps * caps,
  58                                                       GstVideoInfo * info);
  59
  60 gint              gst_v4l2_decoder_request_buffers (GstV4l2Decoder * self,
  61                                                     GstPadDirection direction,
  62                                                     guint num_buffers);
  63
  64 gboolean          gst_v4l2_decoder_export_buffer (GstV4l2Decoder * self,
  65                                                   GstPadDirection directon,
  66                                                   gint index,
  67                                                   gint * fds,
  68                                                   gsize * sizes,
  69                                                   gsize * offsets,
  70                                                   guint *num_fds);
  71
  72 gboolean          gst_v4l2_decoder_queue_sink_mem (GstV4l2Decoder * self,
  73                                                    GstV4l2Request * request,
  74                                                    GstMemory * mem,
  75                                                    guint32 frame_num,
  76                                                    gsize bytesused);
  77
  78 gboolean          gst_v4l2_decoder_dequeue_sink (GstV4l2Decoder * self);
  79
  80 gboolean          gst_v4l2_decoder_queue_src_buffer (GstV4l2Decoder * self,
  81                                                      GstBuffer * buffer,
  82                                                      guint32 frame_num);
  83
  84 gboolean          gst_v4l2_decoder_dequeue_src (GstV4l2Decoder * self,
  85                                                 guint32 *out_frame_num);
  86
  87 gboolean          gst_v4l2_decoder_set_controls (GstV4l2Decoder * self,
  88                                                  GstV4l2Request * request,
  89                                                  struct v4l2_ext_control *control,
  90                                                  guint count);
  91
  92 void              gst_v4l2_decoder_install_properties (GObjectClass * gobject_class,
  93                                                        gint prop_offset,
  94                                                        GstV4l2CodecDevice * device);
  95
  96 void              gst_v4l2_decoder_set_property (GObject * object, guint prop_id,
  97                                                  const GValue * value, GParamSpec * pspec);
  98
  99 void              gst_v4l2_decoder_get_property (GObject * object, guint prop_id,
 100                                                  GValue * value, GParamSpec * pspec);
 101
 102 GstV4l2Request   *gst_v4l2_decoder_alloc_request (GstV4l2Decoder * self);
 103
 104 void              gst_v4l2_request_free (GstV4l2Request * request);
 105
 106 gboolean          gst_v4l2_request_queue (GstV4l2Request * request);
 107
 108 gint              gst_v4l2_request_poll (GstV4l2Request * request, GstClockTime timeout);
 109
 110 void              gst_v4l2_request_set_done (GstV4l2Request * request);
 111
 112 gboolean          gst_v4l2_request_is_done (GstV4l2Request * request);
 113
 114 G_END_DECLS
 115
 116 #endif /* __GST_V4L2_DECODER_H__ */