a dummy video decoder for v4l input

CVS patchset: 3971
CVS date: 2003/01/19 19:42:00

1 files changed, 176 insertions, 0 deletions

diff --git a/src/libxinevdec/yuv_frames.c b/src/libxinevdec/yuv_frames.c
new file mode 100644
index 000000000..e8540f441
--- /dev/null
+++ b/src/libxinevdec/yuv_frames.c
@@ -0,0 +1,176 @@
+/* 
+ * Copyright (C) 2003 the xine project
+ * 
+ * This file is part of xine, a free video player.
+ * 
+ * xine is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * xine 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 General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
+ *
+ * $Id: yuv_frames.c,v 1.1 2003/01/19 19:42:00 guenter Exp $
+ *
+ * dummy video decoder for uncompressed video frames as delivered by v4l
+ */
+
+
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include "xine_internal.h"
+#include "video_out.h"
+#include "buffer.h"
+
+#define LOG
+
+typedef struct {
+  video_decoder_class_t   decoder_class;
+} mpeg2_class_t;
+
+
+typedef struct yuv_frames_decoder_s {
+  video_decoder_t  video_decoder;
+  mpeg2_class_t   *class;
+  xine_stream_t   *stream;
+} yuv_frames_decoder_t;
+
+static void yuv_frames_decode_data (video_decoder_t *this_gen, buf_element_t *buf) {
+  yuv_frames_decoder_t *this = (yuv_frames_decoder_t *) this_gen;
+  int                   frame_size;
+  vo_frame_t           *img;
+
+#ifdef LOG
+  printf ("yuv_frames: decode_data, flags=0x%08x ...\n", buf->decoder_flags);
+#endif
+
+  img = this->stream->video_out->get_frame (this->stream->video_out,
+					    buf->decoder_info[0],
+					    buf->decoder_info[1],
+					    ASPECT_FULL, 
+					    XINE_IMGFMT_YV12,
+					    VO_BOTH_FIELDS);
+
+  img->duration = 3600;
+  img->pts      = buf->pts;
+
+  frame_size = buf->decoder_info[0] * buf->decoder_info[1];
+
+  xine_fast_memcpy (img->base[0], buf->content, frame_size);
+  xine_fast_memcpy (img->base[1], buf->content+frame_size, frame_size/4);
+  xine_fast_memcpy (img->base[2], buf->content+frame_size*5/4, frame_size/4);
+
+      
+  img->draw (img, this->stream);
+  img->free (img);
+
+#ifdef LOG
+  printf ("yuv_frames: decode_data...done\n");
+#endif
+}
+
+static void yuv_frames_flush (video_decoder_t *this_gen) {
+  /* yuv_frames_decoder_t *this = (yuv_frames_decoder_t *) this_gen; */
+
+#ifdef LOG
+  printf ("yuv_frames: flush\n");
+#endif
+}
+
+static void yuv_frames_reset (video_decoder_t *this_gen) {
+  /* yuv_frames_decoder_t *this = (yuv_frames_decoder_t *) this_gen; */
+}
+
+static void yuv_frames_discontinuity (video_decoder_t *this_gen) {
+  /* yuv_frames_decoder_t *this = (yuv_frames_decoder_t *) this_gen; */
+}
+
+static void yuv_frames_dispose (video_decoder_t *this_gen) {
+
+  yuv_frames_decoder_t *this = (yuv_frames_decoder_t *) this_gen;
+
+#ifdef LOG
+  printf ("yuv_frames: close\n");
+#endif
+
+  this->stream->video_out->close(this->stream->video_out, this->stream);
+
+  free (this);
+}
+
+static video_decoder_t *open_plugin (video_decoder_class_t *class_gen, xine_stream_t *stream) {
+  yuv_frames_decoder_t *this ;
+
+  this = (yuv_frames_decoder_t *) malloc (sizeof (yuv_frames_decoder_t));
+  memset(this, 0, sizeof (yuv_frames_decoder_t));
+
+  this->video_decoder.decode_data         = yuv_frames_decode_data;
+  this->video_decoder.flush               = yuv_frames_flush;
+  this->video_decoder.reset               = yuv_frames_reset;
+  this->video_decoder.discontinuity       = yuv_frames_discontinuity;
+  this->video_decoder.dispose             = yuv_frames_dispose;
+  this->stream                            = stream;
+  this->class                             = (mpeg2_class_t *) class_gen;
+
+  stream->video_out->open(stream->video_out, stream);
+
+  return &this->video_decoder;
+}
+
+/*
+ * mpeg2 plugin class
+ */
+
+static char *get_identifier (video_decoder_class_t *this) {
+  return "yuv_frames";
+}
+
+static char *get_description (video_decoder_class_t *this) {
+  return "mpeg2 based video decoder plugin";
+}
+
+static void dispose_class (video_decoder_class_t *this) {
+  free (this);
+}
+
+static void *init_plugin (xine_t *xine, void *data) {
+
+  mpeg2_class_t *this;
+
+  this = (mpeg2_class_t *) malloc (sizeof (mpeg2_class_t));
+
+  this->decoder_class.open_plugin     = open_plugin;
+  this->decoder_class.get_identifier  = get_identifier;
+  this->decoder_class.get_description = get_description;
+  this->decoder_class.dispose         = dispose_class;
+
+  return this;
+}
+/*
+ * exported plugin catalog entry
+ */
+
+static uint32_t supported_types[] = { BUF_VIDEO_YUV_FRAMES, 0 };
+
+static decoder_info_t dec_info_yuv_frames = {
+  supported_types,     /* supported types */
+  6                    /* priority        */
+};
+
+plugin_info_t xine_plugin_info[] = {
+  /* type, API, "name", version, special_info, init_function */  
+  { PLUGIN_VIDEO_DECODER, 14, "yuv_frames", XINE_VERSION_CODE, &dec_info_yuv_frames, init_plugin },
+  { PLUGIN_NONE, 0, "", 0, NULL, NULL }
+};