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, 29 insertions, 27 deletions

diff --git a/src/demuxers/demux_aiff.c b/src/demuxers/demux_aiff.c
index 1ba9c8a0f..ba235e758 100644
--- a/src/demuxers/demux_aiff.c
+++ b/src/demuxers/demux_aiff.c
@@ -19,7 +19,7 @@
  *
  * AIFF File Demuxer by Mike Melanson (melanson@pcisys.net)
  *
- * $Id: demux_aiff.c,v 1.28 2003/03/07 12:51:47 guenter Exp $
+ * $Id: demux_aiff.c,v 1.29 2003/03/31 19:31:54 tmmm Exp $
  *
  */
 
@@ -107,17 +107,32 @@ static int open_aiff_file(demux_aiff_t *this) {
   unsigned int chunk_type;
   unsigned int chunk_size;
   unsigned char buffer[100];
+  unsigned char preview[MAX_PREVIEW_SIZE];
 
-  this->input->seek(this->input, 0, SEEK_SET);
-  if (this->input->read(this->input, signature, AIFF_SIGNATURE_SIZE) !=
-    AIFF_SIGNATURE_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, signature, AIFF_SIGNATURE_SIZE) !=
+      AIFF_SIGNATURE_SIZE)
+      return 0;
+  } else {
+    this->input->get_optional_data(this->input, preview,
+      INPUT_OPTIONAL_DATA_PREVIEW);
+
+    /* copy over the header bytes for processing */
+    memcpy(signature, preview, AIFF_SIGNATURE_SIZE);
+  }
 
   /* check the signature */
   if ((BE_32(&signature[0]) != FORM_TAG) ||
       (BE_32(&signature[8]) != AIFF_TAG))
     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, AIFF_SIGNATURE_SIZE, SEEK_SET);
+  }
+
   /* audio type is PCM unless proven otherwise */
   this->audio_type = BUF_AUDIO_LPCM_BE;
   this->audio_frames = 0;
@@ -285,6 +300,15 @@ static int demux_aiff_seek (demux_plugin_t *this_gen,
 
   demux_aiff_t *this = (demux_aiff_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);
@@ -304,10 +328,6 @@ static int demux_aiff_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;
 }
 
@@ -348,12 +368,6 @@ 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_aiff_t   *this;
 
-  if (! (input->get_capabilities(input) & INPUT_CAP_SEEKABLE)) {
-    if (stream->xine->verbosity >= XINE_VERBOSITY_DEBUG) 
-      printf(_("demux_aiff.c: input not seekable, can not handle!\n"));
-    return NULL;
-  }
-
   this         = xine_xmalloc (sizeof (demux_aiff_t));
   this->stream = stream;
   this->input  = input;
@@ -462,15 +476,3 @@ void *demux_aiff_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, "aiff", XINE_VERSION_CODE, NULL, demux_aiff_init_plugin },
-  { PLUGIN_NONE, 0, "", 0, NULL, NULL }
-};
-#endif