initial commit for VQA and VOC demuxers

CVS patchset: 2437
CVS date: 2002/08/12 00:14:58

3 files changed, 983 insertions, 1 deletions

diff --git a/src/demuxers/Makefile.am b/src/demuxers/Makefile.am
index ff627746d..4a87f1569 100644
--- a/src/demuxers/Makefile.am
+++ b/src/demuxers/Makefile.am
@@ -29,7 +29,8 @@ lib_LTLIBRARIES = $(ogg_module) $(qt_modules) $(asf_module) xineplug_dmx_avi.la
 	xineplug_dmx_cda.la xineplug_dmx_film.la \
 	xineplug_dmx_roq.la xineplug_dmx_fli.la \
 	xineplug_dmx_smjpeg.la xineplug_dmx_wav.la \
-	xineplug_dmx_idcin.la xineplug_dmx_wc3movie.la
+	xineplug_dmx_idcin.la xineplug_dmx_wc3movie.la \
+	xineplug_dmx_vqa.la xineplug_dmx_voc.la
 
 xineplug_dmx_ogg_la_SOURCES = demux_ogg.c
 xineplug_dmx_ogg_la_LIBADD = $(OGG_LIBS) \
@@ -104,6 +105,14 @@ xineplug_dmx_wc3movie_la_SOURCES = demux_wc3movie.c
 xineplug_dmx_wc3movie_la_LIBADD = $(top_builddir)/src/xine-engine/libxine.la
 xineplug_dmx_wc3movie_la_LDFLAGS = -avoid-version -module
 
+xineplug_dmx_vqa_la_SOURCES = demux_vqa.c
+xineplug_dmx_vqa_la_LIBADD = $(top_builddir)/src/xine-engine/libxine.la
+xineplug_dmx_vqa_la_LDFLAGS = -avoid-version -module
+
+xineplug_dmx_voc_la_SOURCES = demux_voc.c
+xineplug_dmx_voc_la_LIBADD = $(top_builddir)/src/xine-engine/libxine.la
+xineplug_dmx_voc_la_LDFLAGS = -avoid-version -module
+
 include_HEADERS = demux.h qtpalette.h
 
 ##
diff --git a/src/demuxers/demux_voc.c b/src/demuxers/demux_voc.c
new file mode 100644
index 000000000..6d052f5bf
--- /dev/null
+++ b/src/demuxers/demux_voc.c
@@ -0,0 +1,482 @@
+/*
+ * Copyright (C) 2001-2002 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
+ *
+ * Creative Voice File Demuxer by Mike Melanson (melanson@pcisys.net)
+ *
+ * $Id: demux_voc.c,v 1.1 2002/08/12 00:14:58 tmmm Exp $
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+
+#include "xine_internal.h"
+#include "xineutils.h"
+#include "demux.h"
+#include "buffer.h"
+#include "bswap.h"
+
+#define LE_16(x) (le2me_16(*(uint16_t *)(x)))
+#define LE_32(x) (le2me_32(*(uint32_t *)(x)))
+
+#define VALID_ENDS "voc"
+#define PCM_BLOCK_ALIGN 1024
+#define VOC_HEADER_SIZE 0x1A
+#define VOC_SIGNATURE "Creative Voice File\x1A"
+#define BLOCK_PREAMBLE_SIZE 4
+
+typedef struct {
+
+  demux_plugin_t       demux_plugin;
+
+  xine_t              *xine;
+
+  config_values_t     *config;
+
+  fifo_buffer_t       *video_fifo;
+  fifo_buffer_t       *audio_fifo;
+
+  input_plugin_t      *input;
+
+  pthread_t            thread;
+  int                  thread_running;
+  pthread_mutex_t      mutex;
+  int                  send_end_buffers;
+  int                  status;
+
+  unsigned int         audio_type;
+  unsigned int         audio_sample_rate;
+  unsigned int         audio_bits;
+  unsigned int         audio_channels;
+
+  off_t                data_start;
+  off_t                data_size;
+  off_t                data_end;
+
+  int                  seek_flag;  /* this is set when a seek just occurred */
+} demux_voc_t;
+
+static void *demux_voc_loop (void *this_gen) {
+
+  demux_voc_t *this = (demux_voc_t *) this_gen;
+  buf_element_t *buf = NULL;
+  unsigned int remaining_sample_bytes;
+  off_t current_file_pos;
+  int64_t current_pts;
+
+  pthread_mutex_lock( &this->mutex );
+  this->seek_flag = 1;
+
+  /* do-while needed to seek after demux finished */
+  do {
+    /* main demuxer loop */
+    while (this->status == DEMUX_OK) {
+
+      /* someone may want to interrupt us */
+      pthread_mutex_unlock( &this->mutex );
+      pthread_mutex_lock( &this->mutex );
+
+      /* just load data chunks from wherever the stream happens to be
+       * pointing; issue a DEMUX_FINISHED status is EOF is reached */
+      remaining_sample_bytes = PCM_BLOCK_ALIGN;
+      current_file_pos = this->input->get_current_pos(this->input);
+
+      current_pts = current_file_pos;
+      current_pts -= this->data_start;
+      current_pts *= 90000;
+      current_pts /= this->audio_sample_rate;
+
+      if (this->seek_flag) {
+        xine_demux_control_newpts(this->xine, current_pts, 0);
+        this->seek_flag = 0;
+      }
+
+      while (remaining_sample_bytes) {
+        buf = this->audio_fifo->buffer_pool_alloc (this->audio_fifo);
+        buf->type = this->audio_type;
+        buf->input_pos = current_file_pos;
+        buf->input_length = this->data_end;
+        buf->input_time = current_pts / 90000;
+        buf->pts = current_pts;
+
+        if (remaining_sample_bytes > buf->max_size)
+          buf->size = buf->max_size;
+        else
+          buf->size = remaining_sample_bytes;
+        remaining_sample_bytes -= buf->size;
+
+        if (this->input->read(this->input, buf->content, buf->size) !=
+          buf->size) {
+          buf->free_buffer(buf);
+          this->status = DEMUX_FINISHED;
+          break;
+        }
+
+        if (!remaining_sample_bytes)
+          buf->decoder_flags |= BUF_FLAG_FRAME_END;
+
+        this->audio_fifo->put (this->audio_fifo, buf);
+      }
+    }
+
+    /* wait before sending end buffers: user might want to do a new seek */
+    while(this->send_end_buffers && this->audio_fifo->size(this->audio_fifo) &&
+          this->status != DEMUX_OK){
+      pthread_mutex_unlock( &this->mutex );
+      xine_usec_sleep(100000);
+      pthread_mutex_lock( &this->mutex );
+    }
+
+  } while (this->status == DEMUX_OK);
+
+  printf ("demux_wav: demux loop finished (status: %d)\n",
+          this->status);
+
+  /* seek back to the beginning of the data in preparation for another
+   * start */
+  this->input->seek(this->input, this->data_start, SEEK_SET);
+
+  this->status = DEMUX_FINISHED;
+
+  if (this->send_end_buffers) {
+    xine_demux_control_end(this->xine, BUF_FLAG_END_STREAM);
+  }
+
+  this->thread_running = 0;
+  pthread_mutex_unlock(&this->mutex);
+
+  return NULL;
+}
+
+static int demux_voc_open(demux_plugin_t *this_gen,
+                          input_plugin_t *input, int stage) {
+
+  demux_voc_t *this = (demux_voc_t *) this_gen;
+  unsigned char header[VOC_HEADER_SIZE];
+
+  this->input = input;
+
+  switch(stage) {
+  case STAGE_BY_CONTENT: {
+    if ((input->get_capabilities(input) & INPUT_CAP_SEEKABLE) == 0)
+      return DEMUX_CANNOT_HANDLE;
+
+    input->seek(input, 0, SEEK_SET);
+    if (input->read(input, header, VOC_HEADER_SIZE) != VOC_HEADER_SIZE)
+      return DEMUX_CANNOT_HANDLE;
+
+    /* check the signature */
+    if (strncmp(header, VOC_SIGNATURE, strlen(VOC_SIGNATURE)) == 0)
+      return DEMUX_CAN_HANDLE;
+
+    return DEMUX_CANNOT_HANDLE;
+  }
+  break;
+
+  case STAGE_BY_EXTENSION: {
+    char *suffix;
+    char *MRL;
+    char *m, *valid_ends;
+
+    MRL = input->get_mrl (input);
+
+    suffix = strrchr(MRL, '.');
+
+    if(!suffix)
+      return DEMUX_CANNOT_HANDLE;
+
+    xine_strdupa(valid_ends, (this->config->register_string(this->config,
+                                                            "mrl.ends_voc", VALID_ENDS,
+                                                            _("valid mrls ending for voc demuxer"),
+                                                            NULL, NULL, NULL)));    while((m = xine_strsep(&valid_ends, ",")) != NULL) {
+
+      while(*m == ' ' || *m == '\t') m++;
+
+      if(!strcasecmp((suffix + 1), m)) {
+        this->input = input;
+        return DEMUX_CAN_HANDLE;
+      }
+    }
+    return DEMUX_CANNOT_HANDLE;
+  }
+  break;
+
+  default:
+    return DEMUX_CANNOT_HANDLE;
+    break;
+  }
+
+  return DEMUX_CANNOT_HANDLE;
+}
+
+static int demux_voc_start (demux_plugin_t *this_gen,
+                            fifo_buffer_t *video_fifo,
+                            fifo_buffer_t *audio_fifo,
+                            off_t start_pos, int start_time) {
+
+  demux_voc_t *this = (demux_voc_t *) this_gen;
+  buf_element_t *buf;
+  int err;
+  unsigned char header[VOC_HEADER_SIZE];
+  unsigned char preamble[BLOCK_PREAMBLE_SIZE];
+  off_t first_block_offset;
+  signed char sample_rate_divisor;
+
+  pthread_mutex_lock(&this->mutex);
+
+  /* if thread is not running, initialize demuxer */
+  if (!this->thread_running) {
+    this->video_fifo = video_fifo;
+    this->audio_fifo = audio_fifo;
+
+    /* load the header */
+    this->input->seek(this->input, 0, SEEK_SET);
+    if (this->input->read(this->input, header, VOC_HEADER_SIZE) != 
+      VOC_HEADER_SIZE) {
+      this->status = DEMUX_FINISHED;
+      pthread_mutex_unlock(&this->mutex);
+      return DEMUX_FINISHED;
+    }
+
+    first_block_offset = LE_16(&header[0x14]);
+    this->input->seek(this->input, first_block_offset, SEEK_SET);
+
+    /* load the block preamble */
+    if (this->input->read(this->input, preamble, BLOCK_PREAMBLE_SIZE) != 
+      BLOCK_PREAMBLE_SIZE) {
+      this->status = DEMUX_FINISHED;
+      pthread_mutex_unlock(&this->mutex);
+      return DEMUX_FINISHED;
+    }
+
+    /* so far, this demuxer only cares about type 1 blocks */
+    if (preamble[0] != 1) {
+      xine_log(this->xine, XINE_LOG_FORMAT,
+        _("unknown VOC block type (0x%02X); please report to xine developers\n"),
+        preamble[0]);
+      this->status = DEMUX_FINISHED;
+      pthread_mutex_unlock(&this->mutex);
+      return DEMUX_FINISHED;
+    }
+
+    /* assemble 24-bit, little endian length */
+    this->data_size = preamble[1] | (preamble[2] << 8) | (preamble[3] << 16);
+
+    /* get the next 2 bytes (re-use preamble bytes) */
+    if (this->input->read(this->input, preamble, 2) != 2) {
+      this->status = DEMUX_FINISHED;
+      pthread_mutex_unlock(&this->mutex);
+      return DEMUX_FINISHED;
+    }
+
+    /* this app only knows how to deal with format 0 data (raw PCM) */
+    if (preamble[1] != 0) {
+      xine_log(this->xine, XINE_LOG_FORMAT,
+        _("unknown VOC compression type (0x%02X); please report to xine developers\n"),
+        preamble[1]);
+      this->status = DEMUX_FINISHED;
+      pthread_mutex_unlock(&this->mutex);
+      return DEMUX_FINISHED;
+    }
+
+    this->audio_type = BUF_AUDIO_LPCM_BE;
+    sample_rate_divisor = preamble[0];
+    this->audio_sample_rate = 256 - (1000000 / sample_rate_divisor);
+    this->data_start = this->input->get_current_pos(this->input);
+    this->data_end = this->data_start + this->data_size;
+    this->audio_bits = 8;
+    this->audio_channels = 1;
+
+    /* print vital stats */
+    xine_log(this->xine, XINE_LOG_FORMAT,
+      _("demux_voc: VOC format 0x%X audio, %d Hz\n"),
+      preamble[1], this->audio_sample_rate);
+
+    /* send start buffers */
+    xine_demux_control_start(this->xine);
+
+    /* send init info to decoders */
+    if (this->audio_fifo && this->audio_type) {
+      buf = this->audio_fifo->buffer_pool_alloc (this->audio_fifo);
+      buf->type = this->audio_type;
+      buf->decoder_flags = BUF_FLAG_HEADER;
+      buf->decoder_info[0] = 0;
+      buf->decoder_info[1] = this->audio_sample_rate;
+      buf->decoder_info[2] = this->audio_bits;
+      buf->decoder_info[3] = this->audio_channels;
+      buf->size = 0;
+      this->audio_fifo->put (this->audio_fifo, buf);
+    }
+
+    this->status = DEMUX_OK;
+    this->send_end_buffers = 1;
+    this->thread_running = 1;
+
+    if ((err = pthread_create (&this->thread, NULL, demux_voc_loop, this)) != 0) {
+      printf ("demux_voc: can't create new thread (%s)\n", strerror(err));
+      abort();
+    }
+  }
+
+  pthread_mutex_unlock(&this->mutex);
+
+  return DEMUX_OK;
+}
+
+static int demux_voc_seek (demux_plugin_t *this_gen,
+                           off_t start_pos, int start_time) {
+
+  demux_voc_t *this = (demux_voc_t *) this_gen;
+  int status;
+  off_t data_offset;
+
+  pthread_mutex_lock(&this->mutex);
+
+  /* check the boundary offsets */
+  if (start_pos < this->data_start)
+    this->input->seek(this->input, this->data_start, SEEK_SET);
+  else if (start_pos >= this->data_end) {
+    this->status = DEMUX_FINISHED;
+    status = this->status;
+    pthread_mutex_unlock(&this->mutex);
+    return status;
+  } else {
+    /* This function must seek along the block alignment. Determine how
+     * far into the data the requested offset lies, divide the diff
+     * by the block alignment integer-wise, and multiply that by the
+     * block alignment to get the new aligned offset. */
+    data_offset = start_pos - this->data_start;
+    data_offset /= PCM_BLOCK_ALIGN;
+    data_offset *= PCM_BLOCK_ALIGN;
+    data_offset += this->data_start;
+
+    this->input->seek(this->input, data_offset, SEEK_SET);
+  }
+
+  this->seek_flag = 1;
+  status = this->status = DEMUX_OK;
+  xine_demux_flush_engine (this->xine);
+  pthread_mutex_unlock(&this->mutex);
+
+  return status;
+}
+
+static void demux_voc_stop (demux_plugin_t *this_gen) {
+
+  demux_voc_t *this = (demux_voc_t *) this_gen;
+  void *p;
+
+  pthread_mutex_lock( &this->mutex );
+
+  if (!this->thread_running) {
+    pthread_mutex_unlock( &this->mutex );
+    return;
+  }
+
+  /* seek back to the beginning of the data in preparation for another
+   * start */
+  this->input->seek(this->input, this->data_start, SEEK_SET);
+
+  this->send_end_buffers = 0;
+  this->status = DEMUX_FINISHED;
+
+  pthread_mutex_unlock( &this->mutex );
+  pthread_join (this->thread, &p);
+
+  xine_demux_flush_engine(this->xine);
+
+  xine_demux_control_end(this->xine, BUF_FLAG_END_USER);
+}
+
+static void demux_voc_close (demux_plugin_t *this_gen) {
+  demux_voc_t *this = (demux_voc_t *) this_gen;
+
+  pthread_mutex_destroy (&this->mutex);
+  free(this);
+}
+
+static int demux_voc_get_status (demux_plugin_t *this_gen) {
+  demux_voc_t *this = (demux_voc_t *) this_gen;
+
+  return this->status;
+}
+
+static char *demux_voc_get_id(void) {
+  return "VOC";
+}
+
+static char *demux_voc_get_mimetypes(void) {
+  return NULL;
+}
+
+/* return the approximate length in seconds */
+static int demux_voc_get_stream_length (demux_plugin_t *this_gen) {
+
+  demux_voc_t *this = (demux_voc_t *) this_gen;
+
+  return 0;
+}
+
+demux_plugin_t *init_demuxer_plugin(int iface, xine_t *xine) {
+
+  demux_voc_t *this;
+
+  if (iface != 10) {
+    printf (_("demux_voc: plugin doesn't support plugin API version %d.\n"
+              "           this means there's a version mismatch between xine and this "
+              "           demuxer plugin.\nInstalling current demux plugins should help.\n"),
+            iface);
+    return NULL;
+  }
+
+  this         = xine_xmalloc (sizeof (demux_voc_t));
+  this->config = xine->config;
+  this->xine   = xine;
+
+  (void*) this->config->register_string(this->config,
+                                        "mrl.ends_voc", VALID_ENDS,
+                                        _("valid mrls ending for voc demuxer"),
+                                        NULL, NULL, NULL);
+
+  this->demux_plugin.interface_version = DEMUXER_PLUGIN_IFACE_VERSION;
+  this->demux_plugin.open              = demux_voc_open;
+  this->demux_plugin.start             = demux_voc_start;
+  this->demux_plugin.seek              = demux_voc_seek;
+  this->demux_plugin.stop              = demux_voc_stop;
+  this->demux_plugin.close             = demux_voc_close;
+  this->demux_plugin.get_status        = demux_voc_get_status;
+  this->demux_plugin.get_identifier    = demux_voc_get_id;
+  this->demux_plugin.get_stream_length = demux_voc_get_stream_length;
+  this->demux_plugin.get_mimetypes     = demux_voc_get_mimetypes;
+
+  this->status = DEMUX_FINISHED;
+  pthread_mutex_init( &this->mutex, NULL );
+
+  return (demux_plugin_t *) this;
+}
+
diff --git a/src/demuxers/demux_vqa.c b/src/demuxers/demux_vqa.c
new file mode 100644
index 000000000..e173ee9b4
--- /dev/null
+++ b/src/demuxers/demux_vqa.c
@@ -0,0 +1,491 @@
+/*
+ * Copyright (C) 2000-2002 the xine project
+ *
+ * This file is part of xine, a unix 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
+ *
+ * VQA File Demuxer by Mike Melanson (melanson@pcisys.net)
+ * For more information regarding the VQA file format, visit:
+ *   http://www.pcisys.net/~melanson/codecs/
+ *
+ * $Id: demux_vqa.c,v 1.1 2002/08/12 00:14:58 tmmm Exp $
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "xine_internal.h"
+#include "xineutils.h"
+#include "compat.h"
+#include "demux.h"
+#include "bswap.h"
+
+#define BE_16(x) (be2me_16(*(unsigned short *)(x)))
+#define BE_32(x) (be2me_32(*(unsigned int *)(x)))
+#define LE_16(x) (le2me_16(*(unsigned short *)(x)))
+#define LE_32(x) (le2me_32(*(unsigned int *)(x)))
+
+#define FOURCC_TAG( ch0, ch1, ch2, ch3 ) \
+        ( (long)(unsigned char)(ch3) | \
+        ( (long)(unsigned char)(ch2) << 8 ) | \
+        ( (long)(unsigned char)(ch1) << 16 ) | \
+        ( (long)(unsigned char)(ch0) << 24 ) )
+
+#define FORM_TAG FOURCC_TAG('F', 'O', 'R', 'M')
+#define WVQA_TAG FOURCC_TAG('W', 'Q', 'V', 'A')
+#define VQHD_TAG FOURCC_TAG('V', 'Q', 'H', 'D')
+#define FINF_TAG FOURCC_TAG('F', 'I', 'N', 'F')
+#define SND0_TAG FOURCC_TAG('S', 'N', 'D', '0')
+#define SND2_TAG FOURCC_TAG('S', 'N', 'D', '2')
+#define VQFR_TAG FOURCC_TAG('V', 'Q', 'F', 'R')
+
+#define VQA_HEADER_SIZE 0x2A
+#define VQA_FRAMERATE 15
+#define VQA_PTS_INC (90000 / VQA_FRAMERATE)
+
+#define VALID_ENDS "vqa"
+
+typedef struct {
+  off_t         frame_offset;
+  unsigned int  frame_size;
+  int64_t       audio_pts;
+  int64_t       video_pts;
+} vqa_frame_t;
+
+typedef struct {
+
+  demux_plugin_t       demux_plugin;
+
+  xine_t              *xine;
+
+  config_values_t     *config;
+
+  fifo_buffer_t       *video_fifo;
+  fifo_buffer_t       *audio_fifo;
+
+  input_plugin_t      *input;
+
+  pthread_t            thread;
+  int                  thread_running;
+  pthread_mutex_t      mutex;
+  int                  send_end_buffers;
+
+  off_t                start;
+  int                  status;
+
+  unsigned int         total_frames;
+  vqa_frame_t         *frame_table;
+  unsigned int         current_frame;
+  unsigned int         last_frame;
+  int                  total_time;
+
+  unsigned int         video_width;
+  unsigned int         video_height;
+  unsigned int         vector_width;
+  unsigned int         vector_height;
+
+  unsigned int         audio_sample_rate;
+  unsigned int         audio_bits;
+  unsigned int         audio_channels;
+} demux_vqa_t ;
+
+static void *demux_vqa_loop (void *this_gen) {
+
+  demux_vqa_t *this = (demux_vqa_t *) this_gen;
+  buf_element_t *buf = NULL;
+  unsigned int i;
+
+  pthread_mutex_lock( &this->mutex );
+
+  /* do-while needed to seek after demux finished */
+  do {
+    /* main demuxer loop */
+    while (this->status == DEMUX_OK) {
+
+      /* someone may want to interrupt us */
+      pthread_mutex_unlock( &this->mutex );
+      pthread_mutex_lock( &this->mutex );
+
+      i = this->current_frame;
+      /* if there is an incongruency between last and current sample, it
+       * must be time to send a new pts */
+      if (this->last_frame + 1 != this->current_frame)
+        xine_demux_control_newpts(this->xine, 
+          this->frame_table[i].video_pts, BUF_FLAG_SEEK);
+
+      this->last_frame = this->current_frame;
+      this->current_frame++;
+
+      /* check if all the samples have been sent */
+      if (i >= this->total_frames) {
+        this->status = DEMUX_FINISHED;
+        break;
+      }
+
+    }
+
+    /* wait before sending end buffers: user might want to do a new seek */
+    while(this->send_end_buffers && this->video_fifo->size(this->video_fifo) &&
+          this->status != DEMUX_OK){
+      pthread_mutex_unlock( &this->mutex );
+      xine_usec_sleep(100000);
+      pthread_mutex_lock( &this->mutex );
+    }
+
+  } while (this->status == DEMUX_OK);
+
+  printf ("demux_vqa: demux loop finished (status: %d)\n",
+          this->status);
+
+  this->status = DEMUX_FINISHED;
+
+  if (this->send_end_buffers) {
+    xine_demux_control_end(this->xine, BUF_FLAG_END_STREAM);
+  }
+
+  this->thread_running = 0;
+  pthread_mutex_unlock(&this->mutex);
+
+  return NULL;
+}
+
+static int demux_vqa_open(demux_plugin_t *this_gen, input_plugin_t *input,
+                          int stage) {
+  demux_vqa_t *this = (demux_vqa_t *) this_gen;
+  char header[12];
+
+  this->input = input;
+
+  switch(stage) {
+  case STAGE_BY_CONTENT: {
+    if ((input->get_capabilities(input) & INPUT_CAP_SEEKABLE) == 0)
+      return DEMUX_CANNOT_HANDLE;
+
+    input->seek(input, 0, SEEK_SET);
+    if (input->read(input, header, 12) != 12)
+      return DEMUX_CANNOT_HANDLE;
+
+    /* check for the VQA signatures */
+    if ((BE_32(&header[0]) == FORM_TAG) &&
+        (BE_32(&header[8]) == WVQA_TAG))
+      return DEMUX_CAN_HANDLE;
+
+    return DEMUX_CANNOT_HANDLE;
+  }
+  break;
+
+  case STAGE_BY_EXTENSION: {
+    char *suffix;
+    char *MRL;
+    char *m, *valid_ends;
+
+    MRL = input->get_mrl (input);
+
+    suffix = strrchr(MRL, '.');
+
+    if(!suffix)
+      return DEMUX_CANNOT_HANDLE;
+
+    xine_strdupa(valid_ends, (this->config->register_string(this->config,
+                                                            "mrl.ends_vqa", VALID_ENDS,
+                                                            _("valid mrls ending for vqa demuxer"),
+                                                            NULL, NULL, NULL)));    while((m = xine_strsep(&valid_ends, ",")) != NULL) {
+
+      while(*m == ' ' || *m == '\t') m++;
+
+      if(!strcasecmp((suffix + 1), m)) {
+        this->input = input;
+        return DEMUX_CAN_HANDLE;
+      }
+    }
+    return DEMUX_CANNOT_HANDLE;
+  }
+  break;
+
+  default:
+    return DEMUX_CANNOT_HANDLE;
+    break;
+
+  }
+
+  return DEMUX_CANNOT_HANDLE;
+}
+
+static int demux_vqa_start (demux_plugin_t *this_gen,
+                             fifo_buffer_t *video_fifo,
+                             fifo_buffer_t *audio_fifo,
+                             off_t start_pos, int start_time) {
+
+  demux_vqa_t *this = (demux_vqa_t *) this_gen;
+  buf_element_t *buf;
+  int err;
+  unsigned char header[VQA_HEADER_SIZE];
+  unsigned char *finf_chunk;
+  int i;
+  off_t last_offset;
+  uint64_t audio_pts_counter = 0;
+  uint64_t video_pts_counter = 0;
+
+  pthread_mutex_lock(&this->mutex);
+
+  /* if thread is not running, initialize demuxer */
+  if (!this->thread_running) {
+    this->video_fifo = video_fifo;
+    this->audio_fifo = audio_fifo;
+
+    /* get the file size (a.k.a., last offset) as reported by the file */
+    this->input->seek(this->input, 4, SEEK_SET);
+    if (this->input->read(this->input, header, 4) != 4) {
+      this->status = DEMUX_FINISHED;
+      pthread_mutex_unlock(&this->mutex);
+      return DEMUX_FINISHED;
+    }
+    last_offset = BE_32(&header[0]);
+
+    /* skip to the VQA header */
+    this->input->seek(this->input, 20, SEEK_SET);
+    if (this->input->read(this->input, header, VQA_HEADER_SIZE)
+      != VQA_HEADER_SIZE) {
+      this->status = DEMUX_FINISHED;
+      pthread_mutex_unlock(&this->mutex);
+      return DEMUX_FINISHED;
+    }
+
+    /* fetch the interesting information */
+    this->total_frames = LE_16(&header[4]);
+    this->video_width = LE_16(&header[6]);
+    this->video_height = LE_16(&header[8]);
+    this->vector_width = header[10];
+    this->vector_height = header[11];
+    this->audio_sample_rate = LE_16(&header[24]);
+
+    /* fetch the chunk table */
+    this->input->seek(this->input, 8, SEEK_CUR);  /* skip FINF and length */
+    finf_chunk = xine_xmalloc(this->total_frames * 4);
+    this->frame_table = xine_xmalloc(this->total_frames * sizeof(vqa_frame_t));
+    if (this->input->read(this->input, finf_chunk, this->total_frames * 4) !=
+      this->total_frames * 4) {
+      this->status = DEMUX_FINISHED;
+      pthread_mutex_unlock(&this->mutex);
+      return DEMUX_FINISHED;
+    }
+    for (i = 0; i < this->total_frames; i++) {
+      this->frame_table[i].frame_offset = (LE_32(&finf_chunk[i * 4]) * 2) &
+        0x03FFFFFF;
+      if (i < this->total_frames - 1)
+        this->frame_table[i].frame_size = LE_32(&finf_chunk[(i + 1) * 4]) * 2 - 
+          this->frame_table[i].frame_offset;
+      else
+        this->frame_table[i].frame_size = last_offset - 
+          this->frame_table[i].frame_offset;
+
+      /*
+       * VQA files play at a constant rate of 15 frames/second. The file data
+       * begins with 1/15 sec of compressed audio followed by 1 video frame
+       * that will be displayed for 1/15 sec.
+       *
+       *   xine pts     frame #
+       *   --------  =  -------  =>  xine pts = 90000 * frame # / 15
+       *    90000         15
+       *
+       * Thus, each frame has a duration of 90000 / 15 (VQA_PTS_INC, in
+       * this code).
+       *
+       * If this is the first frame in the file, it contains 1/2 sec
+       * of audio and no video. Each successive frame represents 1/15 sec.
+       */
+      if (i == 0) {
+        this->frame_table[i].audio_pts = 0;
+        this->frame_table[i].video_pts = 0;
+        audio_pts_counter += (90000 / 2);
+      } else {
+        this->frame_table[i].audio_pts = audio_pts_counter;
+        this->frame_table[i].video_pts = video_pts_counter;
+        audio_pts_counter += VQA_PTS_INC;
+        video_pts_counter += VQA_PTS_INC;
+      }
+    }
+
+    this->total_time = this->frame_table[this->total_frames - 1].video_pts /
+      90000;
+
+    /* print vital stats */
+    xine_log (this->xine, XINE_LOG_FORMAT,
+      _("demux_vqa: running time: %d min, %d sec\n"),
+      this->total_time / 60,
+      this->total_time % 60);
+    xine_log (this->xine, XINE_LOG_FORMAT,
+      _("demux_vqa: %dx%d VQA video, %d Hz IMA ADPCM audio\n"),
+      this->video_width,
+      this->video_height,
+      this->audio_sample_rate);
+
+    /* send start buffers */
+    xine_demux_control_start(this->xine);
+
+    /* send init info to decoders */
+    buf = this->video_fifo->buffer_pool_alloc (this->video_fifo);
+    buf->decoder_flags = BUF_FLAG_HEADER;
+    buf->decoder_info[0] = 0;
+    buf->decoder_info[1] = VQA_PTS_INC;  /* initial video_step */
+    /* really be a rebel: No structure at all, just put the video width
+     * and height straight into the buffer, BE_16 format */
+    buf->content[0] = (this->video_width >> 8) & 0xFF;
+    buf->content[1] = (this->video_width >> 0) & 0xFF;
+    buf->content[2] = (this->video_height >> 8) & 0xFF;
+    buf->content[3] = (this->video_height >> 0) & 0xFF;
+    buf->size = 4;
+    buf->type = BUF_VIDEO_VQA;
+    this->video_fifo->put (this->video_fifo, buf);
+
+    /* send the vector size to the video decoder */
+    buf = this->video_fifo->buffer_pool_alloc (this->video_fifo);
+    buf->decoder_flags = BUF_FLAG_SPECIAL;
+    buf->decoder_info[1] = BUF_SPECIAL_VQA_VECTOR_SIZE;
+    buf->decoder_info[2] = this->vector_width;
+    buf->decoder_info[3] = this->vector_height;
+    buf->size = 0;
+    buf->type = BUF_VIDEO_VQA;
+    this->video_fifo->put (this->video_fifo, buf);
+
+    if (this->audio_fifo && this->audio_channels) {
+      buf = this->audio_fifo->buffer_pool_alloc (this->audio_fifo);
+      buf->type = BUF_AUDIO_VQA_IMA;
+      buf->decoder_flags = BUF_FLAG_HEADER;
+      buf->decoder_info[0] = 0;
+      buf->decoder_info[1] = this->audio_sample_rate;
+      buf->decoder_info[2] = 16;  /* bits/samples */
+      buf->decoder_info[3] = 1;   /* channels */
+      this->audio_fifo->put (this->audio_fifo, buf);
+    }
+
+    this->current_frame = 0;
+    this->last_frame = 0;
+
+    this->status = DEMUX_OK;
+    this->send_end_buffers = 1;
+    this->thread_running = 1;
+
+    if ((err = pthread_create (&this->thread, NULL, demux_vqa_loop, this)) != 0) {
+      printf ("demux_vqa: can't create new thread (%s)\n", strerror(err));
+      abort();
+    }
+
+    this->status = DEMUX_OK;
+  }
+
+  pthread_mutex_unlock(&this->mutex);
+
+  return DEMUX_OK;
+}
+
+static int demux_vqa_seek (demux_plugin_t *this_gen,
+                            off_t start_pos, int start_time) {
+
+  return 0;
+}
+
+static void demux_vqa_stop (demux_plugin_t *this_gen) {
+
+  demux_vqa_t *this = (demux_vqa_t *) this_gen;
+  void *p;
+
+  pthread_mutex_lock( &this->mutex );
+
+  if (!this->thread_running) {
+    pthread_mutex_unlock( &this->mutex );
+    return;
+  }
+
+  this->send_end_buffers = 0;
+  this->status = DEMUX_FINISHED;
+
+  pthread_mutex_unlock( &this->mutex );
+  pthread_join (this->thread, &p);
+
+  xine_demux_flush_engine(this->xine);
+
+  xine_demux_control_end(this->xine, BUF_FLAG_END_USER);
+}
+
+static void demux_vqa_close (demux_plugin_t *this) {
+  free(this);
+}
+
+static int demux_vqa_get_status (demux_plugin_t *this_gen) {
+  demux_vqa_t *this = (demux_vqa_t *) this_gen;
+
+  return this->status;
+}
+
+static char *demux_vqa_get_id(void) {
+  return "VQA";
+}
+
+static int demux_vqa_get_stream_length (demux_plugin_t *this_gen) {
+
+  return 0;
+}
+
+static char *demux_vqa_get_mimetypes(void) {
+  return NULL;
+}
+
+
+demux_plugin_t *init_demuxer_plugin(int iface, xine_t *xine) {
+  demux_vqa_t *this;
+
+  if (iface != 10) {
+    printf (_("demux_vqa: plugin doesn't support plugin API version %d.\n"
+              "           this means there's a version mismatch between xine and this "
+              "           demuxer plugin.\nInstalling current demux plugins should help.\n"),
+            iface);
+    return NULL;
+  }
+
+  this         = (demux_vqa_t *) xine_xmalloc(sizeof(demux_vqa_t));
+  this->config = xine->config;
+  this->xine   = xine;
+
+  (void *) this->config->register_string(this->config,
+                                         "mrl.ends_vqa", VALID_ENDS,
+                                         _("valid mrls ending for vqa demuxer"),                                         NULL, NULL, NULL);
+
+  this->demux_plugin.interface_version = DEMUXER_PLUGIN_IFACE_VERSION;
+  this->demux_plugin.open              = demux_vqa_open;
+  this->demux_plugin.start             = demux_vqa_start;
+  this->demux_plugin.seek              = demux_vqa_seek;
+  this->demux_plugin.stop              = demux_vqa_stop;
+  this->demux_plugin.close             = demux_vqa_close;
+  this->demux_plugin.get_status        = demux_vqa_get_status;
+  this->demux_plugin.get_identifier    = demux_vqa_get_id;
+  this->demux_plugin.get_stream_length = demux_vqa_get_stream_length;
+  this->demux_plugin.get_mimetypes     = demux_vqa_get_mimetypes;
+
+  this->status = DEMUX_FINISHED;
+  pthread_mutex_init(&this->mutex, NULL);
+
+  return &this->demux_plugin;
+}
+