png image support

CVS patchset: 4472
CVS date: 2003/03/23 17:12:26

1 files changed, 278 insertions, 0 deletions

diff --git a/src/demuxers/demux_image.c b/src/demuxers/demux_image.c
new file mode 100644
index 000000000..cb4ade795
--- /dev/null
+++ b/src/demuxers/demux_image.c
@@ -0,0 +1,278 @@
+/* 
+ * 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: demux_image.c,v 1.1 2003/03/23 17:12:29 holstsn Exp $
+ *
+ * image dummy demultiplexer
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "xine_internal.h"
+#include "xineutils.h"
+#include "demux.h"
+
+
+/*
+#define LOG
+*/
+
+typedef struct demux_image_s {
+  demux_plugin_t        demux_plugin;
+
+  xine_stream_t        *stream;
+  
+  fifo_buffer_t        *video_fifo;
+
+  input_plugin_t       *input;
+
+  int                   status;
+  
+} demux_image_t ;
+
+typedef struct {
+
+  demux_class_t     demux_class;
+
+  /* class-wide, global variables here */
+
+  xine_t           *xine;
+  config_values_t  *config;
+
+} demux_image_class_t;
+
+
+static int demux_image_get_status (demux_plugin_t *this_gen) {
+  demux_image_t *this = (demux_image_t *) this_gen;
+
+  return this->status;
+}
+
+static int demux_image_send_chunk (demux_plugin_t *this_gen) {
+  demux_image_t *this = (demux_image_t *) this_gen;
+  buf_element_t *buf = this->video_fifo->buffer_pool_alloc (this->video_fifo);
+
+  buf->content = buf->mem;
+  buf->type = BUF_VIDEO_IMAGE;
+
+  buf->size = this->input->read (this->input, buf->mem, buf->max_size-1);
+
+  if (buf->size <= 0) {
+    buf->free_buffer(buf);
+    this->status = DEMUX_FINISHED;
+  } else {
+
+#ifdef LOG
+  printf("demux_image: got %i bytes\n", buf->size);
+#endif
+
+    this->video_fifo->put (this->video_fifo, buf);
+    this->status = DEMUX_OK;
+  }
+  return this->status;
+}
+
+static void demux_image_send_headers (demux_plugin_t *this_gen) {
+
+  demux_image_t *this = (demux_image_t *) this_gen;
+
+  this->video_fifo  = this->stream->video_fifo;
+
+  this->status = DEMUX_OK;
+
+  this->stream->stream_info[XINE_STREAM_INFO_HAS_VIDEO] = 1;
+  this->stream->stream_info[XINE_STREAM_INFO_HAS_AUDIO] = 0;
+  
+  this->input->seek (this->input, 0, SEEK_SET);
+}
+
+static int demux_image_seek (demux_plugin_t *this_gen,
+			    off_t start_pos, int start_time) {
+
+  demux_image_t *this = (demux_image_t *) this_gen; 
+  
+  return this->status;
+}
+
+static int demux_image_get_stream_length (demux_plugin_t *this_gen) {
+
+  /* demux_image_t *this = (demux_image_t *) this_gen;  */
+
+  return 0;
+}
+
+static uint32_t demux_image_get_capabilities(demux_plugin_t *this_gen) {
+  return DEMUX_CAP_NOCAP;
+}
+
+static int demux_image_get_optional_data(demux_plugin_t *this_gen,
+					void *data, int data_type) {
+  return DEMUX_OPTIONAL_UNSUPPORTED;
+}
+
+static void demux_image_dispose (demux_plugin_t *this_gen) {
+
+  demux_image_t *this = (demux_image_t *) this_gen;  
+
+#ifdef LOG
+  printf("demux_image: closed\n");
+#endif
+
+  free (this);
+}
+
+static demux_plugin_t *open_plugin (demux_class_t *class_gen, 
+				    xine_stream_t *stream, 
+				    input_plugin_t *input) {
+  
+  demux_image_t *this;
+
+  switch (stream->content_detection_method) {
+
+  case METHOD_BY_CONTENT:
+    return NULL;
+    break;
+
+  case METHOD_BY_EXTENSION: {
+
+    char *ending, *mrl;
+    
+    mrl = input->get_mrl (input);
+
+    ending = strrchr(mrl, '.');
+
+    if (!ending) {
+      return NULL;
+    }
+
+    if (strncasecmp (ending, ".png", 4)) {
+      return NULL;
+    }
+  }
+  break;
+
+  case METHOD_EXPLICIT:
+  break;
+
+  default:
+    return NULL;
+  }
+#ifdef LOG
+  printf ("demux_image: input accepted.\n");
+#endif
+  /*
+   * if we reach this point, the input has been accepted.
+   */
+
+  this         = xine_xmalloc (sizeof (demux_image_t));
+  this->stream = stream;
+  this->input  = input;
+
+  this->demux_plugin.send_headers      = demux_image_send_headers;
+  this->demux_plugin.send_chunk        = demux_image_send_chunk;
+  this->demux_plugin.seek              = demux_image_seek;
+  this->demux_plugin.dispose           = demux_image_dispose;
+  this->demux_plugin.get_status        = demux_image_get_status;
+  this->demux_plugin.get_stream_length = demux_image_get_stream_length;
+  this->demux_plugin.get_video_frame   = NULL;
+  this->demux_plugin.got_video_frame_cb= NULL;
+  this->demux_plugin.get_capabilities  = demux_image_get_capabilities;
+  this->demux_plugin.get_optional_data = demux_image_get_optional_data;
+  this->demux_plugin.demux_class       = class_gen;
+  
+  this->status = DEMUX_FINISHED;
+
+#ifdef LOG
+  printf("demux_image: opened\n");
+#endif
+  
+  return &this->demux_plugin;
+}
+
+/*
+ * image demuxer class
+ */
+
+static char *get_description (demux_class_t *this_gen) {
+  return "image demux plugin";
+}
+ 
+static char *get_identifier (demux_class_t *this_gen) {
+  return "imagedmx";
+}
+
+static char *get_extensions (demux_class_t *this_gen) {
+  return "png";
+}
+
+static char *get_mimetypes (demux_class_t *this_gen) {
+  return NULL;
+}
+
+static void class_dispose (demux_class_t *this_gen) {
+
+  demux_image_class_t *this = (demux_image_class_t *) this_gen;
+
+#ifdef LOG
+  printf("demux_image: class closed\n");
+#endif
+  
+  free (this);
+}
+
+static void *init_class (xine_t *xine, void *data) {
+  
+  demux_image_class_t     *this;
+  
+  this         = xine_xmalloc (sizeof (demux_image_class_t));
+  this->config = xine->config;
+  this->xine   = xine;
+
+  this->demux_class.open_plugin     = open_plugin;
+  this->demux_class.get_description = get_description;
+  this->demux_class.get_identifier  = get_identifier;
+  this->demux_class.get_mimetypes   = get_mimetypes;
+  this->demux_class.get_extensions  = get_extensions;
+  this->demux_class.dispose         = class_dispose;
+
+#ifdef LOG
+  printf("demux_image: class opened\n");
+#endif
+
+  return this;
+}
+
+/*
+ * exported plugin catalog entry
+ */
+
+plugin_info_t xine_plugin_info[] = {
+  /* type, API, "name", version, special_info, init_function */  
+  { PLUGIN_DEMUX, 20, "image", XINE_VERSION_CODE, NULL, init_class },
+  { PLUGIN_NONE, 0, "", 0, NULL, NULL }
+};