all of the audio-only demuxers now operate over non-seekable input

CVS patchset: 4525
CVS date: 2003/03/31 19:31:54

1 files changed, 28 insertions, 31 deletions

diff --git a/src/demuxers/demux_snd.c b/src/demuxers/demux_snd.c
index 8898460e5..831ad542c 100644
--- a/src/demuxers/demux_snd.c
+++ b/src/demuxers/demux_snd.c
@@ -19,7 +19,7 @@
  *
  * SND/AU File Demuxer by Mike Melanson (melanson@pcisys.net)
  *
- * $Id: demux_snd.c,v 1.27 2003/03/07 12:51:48 guenter Exp $
+ * $Id: demux_snd.c,v 1.28 2003/03/31 19:31:56 tmmm Exp $
  *
  */
 
@@ -92,21 +92,31 @@ typedef struct {
 static int open_snd_file(demux_snd_t *this) {
 
   unsigned char header[SND_HEADER_SIZE];
+  unsigned char preview[MAX_PREVIEW_SIZE];
   unsigned int encoding;
 
-  this->input->seek(this->input, 0, SEEK_SET);
-  if (this->input->read(this->input, header, SND_HEADER_SIZE) != 
-    SND_HEADER_SIZE)
-    return 0;
+  if (this->input->get_capabilities(this->input) & INPUT_CAP_SEEKABLE) {
+    this->input->seek(this->input, 0, SEEK_SET);
+    if (this->input->read(this->input, header, SND_HEADER_SIZE) != 
+      SND_HEADER_SIZE)
+      return 0;
+  } else {
+    this->input->get_optional_data(this->input, preview,
+      INPUT_OPTIONAL_DATA_PREVIEW);
+
+    /* copy over the header bytes for processing */
+    memcpy(header, preview, SND_HEADER_SIZE);
+  }
 
   /* check the signature */
   if (BE_32(&header[0]) != snd_TAG)
     return 0;
 
-  this->input->seek(this->input, 0, SEEK_SET);
-  if (this->input->read(this->input, header, SND_HEADER_SIZE) !=
-    SND_HEADER_SIZE)
-    return 0;
+  /* file is qualified; if the input was not seekable, skip over the header
+   * bytes in the stream */
+  if ((this->input->get_capabilities(this->input) & INPUT_CAP_SEEKABLE) == 0) {
+    this->input->seek(this->input, SND_HEADER_SIZE, SEEK_SET);
+  }
 
   this->data_start = BE_32(&header[0x04]);
   this->data_size = BE_32(&header[0x08]);
@@ -257,6 +267,15 @@ static int demux_snd_seek (demux_plugin_t *this_gen,
 
   demux_snd_t *this = (demux_snd_t *) this_gen;
   
+  this->seek_flag = 1;
+  this->status = DEMUX_OK;
+  xine_demux_flush_engine (this->stream);
+  
+  /* if input is non-seekable, do not proceed with the rest of this
+   * seek function */
+  if ((this->input->get_capabilities(this->input) & INPUT_CAP_SEEKABLE) == 0)
+    return this->status;
+
   /* check the boundary offsets */
   if (start_pos < 0)
     this->input->seek(this->input, this->data_start, SEEK_SET);
@@ -276,10 +295,6 @@ static int demux_snd_seek (demux_plugin_t *this_gen,
     this->input->seek(this->input, start_pos, SEEK_SET);
   }
 
-  this->seek_flag = 1;
-  this->status = DEMUX_OK;
-  xine_demux_flush_engine (this->stream);
-  
   return this->status;
 }
 
@@ -318,12 +333,6 @@ static demux_plugin_t *open_plugin (demux_class_t *class_gen, xine_stream_t *str
   input_plugin_t *input = (input_plugin_t *) input_gen;
   demux_snd_t    *this;
 
-  if (! (input->get_capabilities(input) & INPUT_CAP_SEEKABLE)) {
-    if (stream->xine->verbosity >= XINE_VERBOSITY_DEBUG) 
-      printf(_("demux_snd.c: input not seekable, can not handle!\n"));
-    return NULL;
-  }
-
   this         = xine_xmalloc (sizeof (demux_snd_t));
   this->stream = stream;
   this->input  = input;
@@ -434,15 +443,3 @@ void *demux_snd_init_plugin (xine_t *xine, void *data) {
 
   return this;
 }
-
-/*
- * exported plugin catalog entry
- */
-
-#if 0
-plugin_info_t xine_plugin_info[] = {
-  /* type, API, "name", version, special_info, init_function */  
-  { PLUGIN_DEMUX, 20, "snd", XINE_VERSION_CODE, NULL, demux_snd_init_plugin },
-  { PLUGIN_NONE, 0, "", 0, NULL, NULL }
-};
-#endif