new IFF demuxer, currently only IFF-8SVX support, but more in the future

CVS patchset: 5980
CVS date: 2004/01/03 19:59:00

1 files changed, 885 insertions, 0 deletions

diff --git a/src/demuxers/demux_iff.c b/src/demuxers/demux_iff.c
new file mode 100644
index 000000000..51b581be3
--- /dev/null
+++ b/src/demuxers/demux_iff.c
@@ -0,0 +1,885 @@
+/*
+ * Copyright (C) 2004 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
+ */
+
+/*
+ * IFF File Demuxer by Manfred Tremmel (Manfred.Tremmel@iiv.de)
+ * Based on the AIFF demuxer and the information of the Amiga Developer CD
+ *
+ * currently supported iff-formats:
+ * * 8SVX (uncompressed, deltacompression fibonacci and exponential)
+ *   + volume rescaling is supported
+ *   + multiple channels using CHAN and PAN Chunks are supported
+ *   - SEQN and FADE chunks are not supported at the moment
+ *     (I do understand what to do, but I hate the work behind it ;-) )
+ *   - the optional data chunks ATAK and RLSE are not supported at the moment
+ *     (no examples found and description isn't as clear as it should)
+ *
+ * $Id: demux_iff.c,v 1.1 2004/01/03 19:59:00 manfredtremmel Exp $
+ */
+
+#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"
+#include "buffer.h"
+#include "bswap.h"
+
+#define FOURCC_CHUNK BE_FOURCC
+#define IFF_8SVX_CHUNK FOURCC_CHUNK('8', 'S', 'V', 'X')
+#define IFF_ANFI_CHUNK FOURCC_CHUNK('A', 'N', 'F', 'I')
+#define IFF_ANHD_CHUNK FOURCC_CHUNK('A', 'N', 'H', 'D')
+#define IFF_ANIM_CHUNK FOURCC_CHUNK('A', 'N', 'I', 'M')
+#define IFF_ANNO_CHUNK FOURCC_CHUNK('A', 'N', 'N', 'O')
+#define IFF_ANSQ_CHUNK FOURCC_CHUNK('A', 'N', 'S', 'Q')
+#define IFF_ATAK_CHUNK FOURCC_CHUNK('A', 'T', 'A', 'K')
+#define IFF_AUTH_CHUNK FOURCC_CHUNK('A', 'U', 'T', 'H')
+#define IFF_BMHD_CHUNK FOURCC_CHUNK('B', 'M', 'H', 'D')
+#define IFF_BODY_CHUNK FOURCC_CHUNK('B', 'O', 'D', 'Y')
+#define IFF_CAMG_CHUNK FOURCC_CHUNK('C', 'A', 'M', 'G')
+#define IFF_CHAN_CHUNK FOURCC_CHUNK('C', 'H', 'A', 'N')
+#define IFF_COPY_CHUNK FOURCC_CHUNK('(', 'c', ')', ' ')
+#define IFF_CRNG_CHUNK FOURCC_CHUNK('C', 'R', 'N', 'G')
+#define IFF_DLTA_CHUNK FOURCC_CHUNK('D', 'L', 'T', 'A')
+#define IFF_DPAN_CHUNK FOURCC_CHUNK('D', 'P', 'A', 'N')
+#define IFF_DPI_CHUNK  FOURCC_CHUNK('D', 'P', 'I', ' ')
+#define IFF_DPPS_CHUNK FOURCC_CHUNK('D', 'P', 'P', 'S')
+#define IFF_DPPV_CHUNK FOURCC_CHUNK('D', 'P', 'P', 'V')
+#define IFF_DRNG_CHUNK FOURCC_CHUNK('D', 'R', 'N', 'G')
+#define IFF_FACE_CHUNK FOURCC_CHUNK('F', 'A', 'C', 'E')
+#define IFF_FADE_CHUNK FOURCC_CHUNK('F', 'A', 'D', 'E')
+#define IFF_FORM_CHUNK FOURCC_CHUNK('F', 'O', 'R', 'M')
+#define IFF_FVER_CHUNK FOURCC_CHUNK('F', 'V', 'E', 'R')
+#define IFF_GRAB_CHUNK FOURCC_CHUNK('G', 'R', 'A', 'B')
+#define IFF_ILBM_CHUNK FOURCC_CHUNK('I', 'L', 'B', 'M')
+#define IFF_IMRT_CHUNK FOURCC_CHUNK('I', 'M', 'R', 'T')
+#define IFF_JUNK_CHUNK FOURCC_CHUNK('J', 'U', 'N', 'K')
+#define IFF_LIST_CHUNK FOURCC_CHUNK('L', 'I', 'S', 'T')
+#define IFF_NAME_CHUNK FOURCC_CHUNK('N', 'A', 'M', 'E')
+#define IFF_PAN_CHUNK  FOURCC_CHUNK('P', 'A', 'N', ' ')
+#define IFF_PROP_CHUNK FOURCC_CHUNK('P', 'R', 'O', 'P')
+#define IFF_RLSE_CHUNK FOURCC_CHUNK('R', 'L', 'S', 'E')
+#define IFF_SEQN_CHUNK FOURCC_CHUNK('S', 'E', 'Q', 'N')
+#define IFF_TINY_CHUNK FOURCC_CHUNK('T', 'I', 'N', 'Y')
+#define IFF_VHDR_CHUNK FOURCC_CHUNK('V', 'H', 'D', 'R')
+
+#define MONO      0L
+#define PAN       1L
+#define RIGHT     4L
+#define LEFT      2L
+#define STEREO    6L
+
+#define PREAMBLE_SIZE 8
+#define IFF_JUNK_SIZE 8
+#define IFF_SIGNATURE_SIZE 12
+#define PCM_BLOCK_ALIGN 1024
+
+#define max_volume 65536                        /* Unity = Fixed 1.0 = maximum volume */
+
+int8_t fibonacci[] = { -34, -21, -13, -8, -5, -3, -2, -1, 0, 1, 2, 3, 5, 8, 13, 21 };
+
+int8_t exponential[] = { -128, -64, -32, -16, -8, -4, -2, -1, 0, 1, 2, 4, 8, 16, 32, 64 };
+
+
+typedef struct {
+  uint16_t             atak_duration;           /* segment duration in milliseconds */
+  uint32_t             atak_dest;               /* destination volume factor */
+} eg_point;
+
+typedef struct {
+  demux_plugin_t       demux_plugin;
+
+  xine_stream_t       *stream;
+  fifo_buffer_t       *video_fifo;
+  fifo_buffer_t       *audio_fifo;
+  input_plugin_t      *input;
+  int                  status;
+
+  uint32_t             iff_type;                /* Type of iff-file, see TAGs above */
+
+  /* chunk infos to be rememberd */
+  /* audio chunks */
+  uint32_t             vhdr_oneShotHiSamples;   /* # samples in the high octave 1-shot part */
+  uint32_t             vhdr_repeatHiSamples;    /* # samples in the high octave repeat part */
+  uint32_t             vhdr_samplesPerHiCycle;  /* # samples/cycle in high octave, else 0 */
+  uint16_t             vhdr_samplesPerSec;      /* data sampling rate */
+  uint8_t              vhdr_ctOctave;           /* # of octaves of waveforms */
+  uint8_t              vhdr_sCompression;       /* data compression technique used */
+  uint32_t             vhdr_volume;             /* playback nominal volume from 0 to Unity
+                                                 * (full volume). Map this value into
+                                                 * the output hardware's dynamic range.
+                                                 */
+  eg_point             *atak_eg_point;          /* ? */
+  eg_point             *rlse_eg_point;          /* ? */
+  uint32_t             chan_settings;           /* Mono, Stereo, Left or Right Channel */
+  uint32_t             pan_sposition;           /*  */
+
+  /* some common informations */
+  char                 *title;                  /* Name of the stream from NAME-Tag*/
+  char                 *copyright;              /* Copyright entry */
+  char                 *author;                 /* author entry */
+  char                 *annotations;            /* comment of the author, maybe authoring tool */
+  char                 *version;                /* version information of the file */
+
+  /* audio information */
+  unsigned int         audio_type;
+  unsigned int         audio_frames;
+  unsigned int         audio_bits;
+  unsigned int         audio_channels;
+  unsigned int         audio_block_align;
+  unsigned int         audio_bytes_per_second;
+  unsigned char        *audio_interleave_buffer;
+  uint32_t             audio_interleave_buffer_size;
+  unsigned char        *audio_read_buffer;
+  uint32_t             audio_read_buffer_size;
+  int                  audio_buffer_filled;
+  uint32_t             audio_volume_left;
+  uint32_t             audio_volume_right;
+  uint32_t             audio_position;
+  int                  audio_compression_factor;
+
+
+  unsigned int         running_time;
+
+  off_t                data_start;
+  off_t                data_size;
+
+  int                  seek_flag;  /* this is set when a seek just occurred */
+} demux_iff_t;
+
+typedef struct {
+  demux_class_t     demux_class;
+} demux_iff_class_t;
+
+
+/* Decode delta encoded data from n byte source
+ * buffer into double as long dest buffer, given initial data
+ * value x. The value x is also returned for incrementally
+ * decompression. With different decoding tables you can use
+ * different decoding deltas
+ */
+
+static int8_t delta_decode_block(int8_t *source, int32_t n, int8_t *dest, int8_t x, int8_t *table) {
+  int32_t i;
+  int lim = n * 2;
+
+  for (i=0; i < lim; i++) {
+    /* Decode a data nibble, high nibble then low nibble */
+    x += (i & 1) ?
+         table[((uint8_t)(source[i >> 1]) & 0xf)] :
+         table[((uint8_t)(source[i >> 1]) >> 4)];
+    dest[i] = x;           /* store a 1 byte sample */
+  }
+  return(x);
+}
+
+/* Decode a complete delta encoded array */
+static void delta_decode(int8_t *dest, int8_t *source, int32_t n, int8_t *table){
+  delta_decode_block(&source[2], n-2, dest, source[1], table);
+}
+
+/* returns 1 if the IFF file was opened successfully, 0 otherwise */
+static int open_iff_file(demux_iff_t *this) {
+
+  unsigned char signature[IFF_SIGNATURE_SIZE];
+  unsigned char buffer[256];
+  unsigned int  keep_on_reading = 1;
+  uint32_t      junk_size;
+
+  if (_x_demux_read_header(this->input, signature, IFF_SIGNATURE_SIZE) != IFF_SIGNATURE_SIZE)
+    return 0;
+
+  /* check the signature */
+  if (BE_32(&signature[0]) == IFF_FORM_CHUNK)
+  {
+    switch( BE_32(&signature[8]) )
+    {
+      case IFF_8SVX_CHUNK:
+/*      case IFF_ANIM_CHUNK:*/
+/*      case IFF_ILBM_CHUNK:*/
+        this->iff_type = BE_32(&signature[8]);
+        break;
+      default:
+        return 0;
+        break;
+    }
+  } else
+    return 0;
+
+  /* file is qualified; skip over the header bytes in the stream */
+  this->input->seek(this->input, IFF_SIGNATURE_SIZE, SEEK_SET);
+
+  this->title                           = 0;
+  this->copyright                       = 0;
+  this->author                          = 0;
+  this->annotations                     = 0;
+  this->version                         = 0;
+
+  this->vhdr_oneShotHiSamples           = 0;
+  this->vhdr_repeatHiSamples            = 0;
+  this->vhdr_samplesPerHiCycle          = 0;
+  this->vhdr_samplesPerSec              = 0;
+  this->vhdr_ctOctave                   = 0;
+  this->vhdr_sCompression               = 0;
+  this->vhdr_volume                     = 0;
+  this->chan_settings                   = 0;
+  this->audio_type                      = 0;
+  this->audio_frames                    = 0;
+  this->audio_bits                      = 0;
+  this->audio_channels                  = 0;
+  this->audio_block_align               = 0;
+  this->audio_bytes_per_second          = 0;
+  this->running_time                    = 0;
+  this->data_start                      = 0;
+  this->data_size                       = 0;
+  this->seek_flag                       = 0;
+  this->audio_interleave_buffer         = 0;
+  this->audio_interleave_buffer_size    = 0;
+  this->audio_read_buffer               = 0;
+  this->audio_read_buffer_size          = 0;
+  this->audio_buffer_filled             = 0;
+  this->audio_compression_factor        = 1;
+  this->audio_position                  = 0;
+  this->atak_eg_point                   = 0;
+  this->rlse_eg_point                   = 0;
+
+  while ( keep_on_reading == 1 ) {
+    if (this->input->read(this->input, signature, IFF_JUNK_SIZE) == IFF_JUNK_SIZE) {
+      junk_size = BE_32(&signature[4]);
+      if ( junk_size < 256 ) {
+        if (this->input->read(this->input, buffer, junk_size) != junk_size)
+          return 0;
+      }
+
+      switch( BE_32(&signature[0]) ) {
+        case IFF_VHDR_CHUNK:
+          this->vhdr_oneShotHiSamples   = BE_32(&buffer[0]);
+          this->vhdr_repeatHiSamples    = BE_32(&buffer[4]);
+          this->vhdr_samplesPerHiCycle  = BE_32(&buffer[8]);
+          this->vhdr_samplesPerSec      = BE_16(&buffer[12]);
+          this->vhdr_ctOctave           = buffer[14];
+          this->vhdr_sCompression       = buffer[15];
+          this->audio_channels          = 1;
+          this->chan_settings           = MONO;
+          switch( this->vhdr_sCompression ) {
+            case 0:  /* 8 Bits */
+            case 1:  /* Fibonacci */
+            case 2:  /* Exponential*/
+              this->audio_bits          = 8;
+              this->audio_block_align   = PCM_BLOCK_ALIGN;
+              this->audio_type          = BUF_AUDIO_LPCM_BE;
+              break;
+            default: /* unknown codec */
+              xine_log(this->stream->xine, XINE_LOG_MSG,
+                       _("iff-8svx: unknown compression: %d\n"),
+                       this->vhdr_sCompression);
+              return 0;
+              break;
+          }
+          this->vhdr_volume             = BE_32(&buffer[16]);
+          if (this->vhdr_volume > max_volume)
+            this->vhdr_volume           = max_volume;
+          break;
+        case IFF_NAME_CHUNK:
+          this->title                   = strndup( (const char *)buffer, (size_t)junk_size);
+          break;
+        case IFF_COPY_CHUNK:
+          this->copyright               = strndup( (const char *)buffer, (size_t)junk_size);
+          break;
+        case IFF_AUTH_CHUNK:
+          this->author                  = strndup( (const char *)buffer, (size_t)junk_size);
+          break;
+        case IFF_ANNO_CHUNK:
+          this->annotations             = strndup( (const char *)buffer, (size_t)junk_size);
+          break;
+        case IFF_FVER_CHUNK:
+          this->version                 = strndup( (const char *)buffer, (size_t)junk_size);
+           break;
+        case IFF_ATAK_CHUNK:
+          /* not implemented yet */
+          break;
+        case IFF_RLSE_CHUNK:
+          /* not implemented yet */
+          break;
+        case IFF_CHAN_CHUNK:
+          this->chan_settings           = BE_32(&buffer[0]);
+          switch( this->chan_settings ) {
+            case STEREO:
+              this->audio_volume_left   = this->vhdr_volume;
+              this->audio_volume_right  = this->vhdr_volume;
+              this->audio_channels      = 2;
+              break;
+            case LEFT:
+              this->audio_volume_left   = this->vhdr_volume;
+              this->audio_volume_right  = 0;
+              this->audio_channels      = 2;
+              break;
+            case RIGHT:
+              this->audio_volume_left   = 0;
+              this->audio_volume_right  = this->vhdr_volume;
+              this->audio_channels      = 2;
+              break;
+            default:
+              this->chan_settings       = MONO;
+              this->audio_channels      = 1;
+              break;
+          }
+          break;
+        case IFF_PAN_CHUNK:
+          this->chan_settings           = PAN;
+          this->pan_sposition           = BE_32(&buffer[0]);
+          this->audio_channels          = 2;
+          this->audio_volume_left       = this->vhdr_volume / (max_volume / this->pan_sposition);
+          this->audio_volume_right      = this->vhdr_volume - this->audio_volume_left;
+          break;
+        case IFF_JUNK_CHUNK:
+          /* JUNK contains garbage and should be ignored */
+          break;
+        case IFF_BODY_CHUNK:
+          this->data_start              = this->input->get_current_pos(this->input);
+          this->data_size               = junk_size;
+          if( this->vhdr_sCompression > 0 ) {
+            this->audio_interleave_buffer_size = this->data_size * 2;
+            this->audio_read_buffer_size       = this->data_size;
+          } else {
+            this->audio_interleave_buffer_size = this->data_size;
+            this->audio_read_buffer_size       = 0;
+          }
+          if( this->chan_settings == MONO)
+            this->audio_volume_left     = this->vhdr_volume;
+          keep_on_reading               = 0;
+          break;
+        default:
+          signature[4]                  = 0;
+          xine_log(this->stream->xine, XINE_LOG_MSG, _("iff: unknown Chunk: %s\n"), signature);
+          break;
+      }
+    } else
+      keep_on_reading                   = 0;
+  }
+
+  this->audio_bytes_per_second          = this->audio_channels *
+                                          (this->audio_bits / 8) * this->vhdr_samplesPerSec;
+  this->running_time                    = ((this->vhdr_oneShotHiSamples +
+                                            this->vhdr_repeatHiSamples) *
+                                           1000 / this->vhdr_samplesPerSec) /
+                                          this->audio_channels;
+  xprintf (this->stream->xine, XINE_VERBOSITY_LOG, "vhdr_oneShotHiSamples      %d\n",
+           this->vhdr_oneShotHiSamples);
+  xprintf (this->stream->xine, XINE_VERBOSITY_LOG, "vhdr_repeatHiSamples       %d\n",
+           this->vhdr_repeatHiSamples);
+  xprintf (this->stream->xine, XINE_VERBOSITY_LOG, "vhdr_samplesPerHiCycle     %d\n",
+           this->vhdr_samplesPerHiCycle);
+  xprintf (this->stream->xine, XINE_VERBOSITY_LOG, "vhdr_samplesPerSec         %d\n",
+           this->vhdr_samplesPerSec);
+  xprintf (this->stream->xine, XINE_VERBOSITY_LOG, "vhdr_ctOctave              %d\n",
+           this->vhdr_ctOctave);
+  xprintf (this->stream->xine, XINE_VERBOSITY_LOG, "vhdr_sCompression          %d\n",
+           this->vhdr_sCompression);
+  xprintf (this->stream->xine, XINE_VERBOSITY_LOG, "vhdr_volume                %d\n",
+           this->vhdr_volume);
+  xprintf (this->stream->xine, XINE_VERBOSITY_LOG, "chan_settings              %d\n",
+           this->chan_settings);
+  if( this->title )
+    xprintf (this->stream->xine, XINE_VERBOSITY_LOG, "title                      %s\n",
+           this->title);
+  if( this->copyright )
+    xprintf (this->stream->xine, XINE_VERBOSITY_LOG, "copyright                  %s\n",
+           this->copyright);
+  if( this->author )
+    xprintf (this->stream->xine, XINE_VERBOSITY_LOG, "author                     %s\n",
+           this->author);
+  if( this->annotations )
+    xprintf (this->stream->xine, XINE_VERBOSITY_LOG, "annotations                %s\n",
+           this->annotations);
+  if( this->version )
+    xprintf (this->stream->xine, XINE_VERBOSITY_LOG, "version                    %s\n",
+           this->version);
+
+  return 1;
+}
+
+static int demux_iff_send_chunk(demux_plugin_t *this_gen) {
+
+  demux_iff_t *this                     = (demux_iff_t *) this_gen;
+
+  buf_element_t *buf                    = NULL;
+  unsigned int remaining_sample_bytes;
+  off_t current_file_pos;
+  int32_t input_length;
+  int64_t zw_pts;
+  int64_t zw_rescale;
+  int j, k;
+  int first_buf;
+  int interleave_index;
+
+  /* when audio is available and it's a stereo, left or right stream
+   * at iff 8svx, the complete left stream at the beginning and the
+   * right channel at the end of the stream. Both have to be inter-
+   * leaved, the same way as in the sega film demuxer. I've copied
+   * it out there
+   */
+  if(this->audio_bits > 0) {
+    /* just load data chunks from wherever the stream happens to be
+     * pointing; issue a DEMUX_FINISHED status if EOF is reached */
+    current_file_pos                    = this->audio_position;
+
+    /* load the whole chunk into the buffer */
+    if (this->audio_buffer_filled == 0) {
+      if (this->audio_interleave_buffer_size > 0)
+        this->audio_interleave_buffer   =
+              xine_xmalloc(this->audio_interleave_buffer_size);
+      if (this->audio_read_buffer_size > 0)
+        this->audio_read_buffer         =
+                  xine_xmalloc(this->audio_read_buffer_size);
+      if (this->audio_read_buffer) {
+        if (this->input->read(this->input, this->audio_read_buffer,
+            this->data_size) != this->data_size) {
+          this->status                  = DEMUX_FINISHED;
+          return this->status;
+        }
+
+        switch( this->vhdr_sCompression ) {
+          case 1:
+            if (this->chan_settings == STEREO) {
+              delta_decode((int8_t *)(this->audio_interleave_buffer),
+                           (int8_t *)(this->audio_read_buffer),
+                           (this->data_size/2),
+                           fibonacci);
+              delta_decode((int8_t *)(&(this->audio_interleave_buffer[this->data_size])),
+                           (int8_t *)(&(this->audio_read_buffer[(this->data_size/2)])),
+                           (this->data_size/2),
+                           fibonacci);
+            } else
+              delta_decode((int8_t *)(this->audio_interleave_buffer),
+                           (int8_t *)(this->audio_read_buffer),
+                           this->data_size,
+                           fibonacci);
+            this->audio_compression_factor = 2;
+            break;
+          case 2:
+            if (this->chan_settings == STEREO) {
+              delta_decode((int8_t *)(this->audio_interleave_buffer),
+                           (int8_t *)(this->audio_read_buffer),
+                           (this->data_size/2),
+                           exponential);
+              delta_decode((int8_t *)(&(this->audio_interleave_buffer[this->data_size])),
+                           (int8_t *)(&(this->audio_read_buffer[(this->data_size/2)])),
+                           (this->data_size/2),
+                           exponential);
+            } else
+              delta_decode((int8_t *)(this->audio_interleave_buffer),
+                           (int8_t *)(this->audio_read_buffer),
+                           this->data_size,
+                           exponential);
+            this->audio_compression_factor = 2;
+            break;
+          default:
+            break;
+        }
+        free( this->audio_read_buffer );
+        this->audio_read_buffer         = 0;
+      } else {
+        if (this->input->read(this->input, this->audio_interleave_buffer,
+            this->data_size) != this->data_size) {
+          this->status                  = DEMUX_FINISHED;
+          return this->status;
+        }
+      }
+      this->audio_buffer_filled         = 1;
+    }
+
+    /* proceed to de-interleave into individual buffers */
+    if (this->chan_settings == STEREO) {
+      remaining_sample_bytes            = ((this->data_size - current_file_pos) *
+                                           this->audio_compression_factor) / 2;
+      interleave_index                  = (current_file_pos *
+                                           this->audio_compression_factor) / 2;
+    } else {
+      remaining_sample_bytes            = ((this->data_size - current_file_pos) *
+                                           this->audio_compression_factor);
+      interleave_index                  = (current_file_pos *
+                                           this->audio_compression_factor);
+    }
+    first_buf                           = 1;
+
+    zw_pts                              = current_file_pos;
+
+    if (this->chan_settings == STEREO)
+      input_length                      = this->data_size *
+                                          this->audio_compression_factor;
+    else
+      input_length                      = this->data_size *
+                                          this->audio_compression_factor *
+                                          this->audio_channels;
+    while (remaining_sample_bytes) {
+      buf                               = this->audio_fifo->buffer_pool_alloc (this->audio_fifo);
+      buf->type                         = this->audio_type;
+      buf->extra_info->input_pos        = zw_pts;
+      buf->extra_info->input_length     = input_length;
+      buf->pts                          = zw_pts * 90000 / this->audio_bytes_per_second;
+      buf->extra_info->input_time       = buf->pts / 90;
+
+      if (remaining_sample_bytes > buf->max_size / this->audio_channels)
+        buf->size                       = buf->max_size;
+      else
+        buf->size                       = remaining_sample_bytes * this->audio_channels;
+      remaining_sample_bytes           -= buf->size / this->audio_channels;
+      zw_pts                           += buf->size;
+
+      if (this->audio_bits == 16) {
+        if (this->chan_settings == STEREO ||
+            this->chan_settings == LEFT   ||
+            this->chan_settings == PAN    ||
+            this->chan_settings == MONO) {
+          for (j = 0, k = interleave_index; j < buf->size; j += 4, k += 2) {
+            buf->content[j]             = this->audio_interleave_buffer[k];
+            buf->content[j + 1]         = this->audio_interleave_buffer[k + 1];
+          }
+        } else {
+          for (j = 0; j < buf->size; j += 4) {
+            buf->content[j]             = 0;
+            buf->content[j + 1]         = 0;
+          }
+        }
+
+        if (this->chan_settings == STEREO ||
+            this->chan_settings == RIGHT) {
+          if (this->chan_settings == STEREO)
+            k                           = interleave_index +
+                                          (this->data_size *
+                                           this->audio_compression_factor / 2);
+          else
+            k                           = interleave_index *
+                                          this->audio_compression_factor;
+          for (j = 2; j < buf->size; j += 4, k += 2) {
+            buf->content[j]             = this->audio_interleave_buffer[k];
+            buf->content[j + 1]         = this->audio_interleave_buffer[k + 1];
+          }
+        } else {
+          for (j = 2; j < buf->size; j += 4) {
+            buf->content[j]             = 0;
+            buf->content[j + 1]         = 0;
+          }
+        }
+      } else {
+        if (this->chan_settings == STEREO ||
+            this->chan_settings == LEFT   ||
+            this->chan_settings == PAN    ||
+            this->chan_settings == MONO) {
+          if( this->audio_volume_left == max_volume ) {
+            for (j = 0, k = interleave_index; j < buf->size; j += this->audio_channels) {
+              buf->content[j]           = this->audio_interleave_buffer[k++] + 0x80;
+            }
+          } else {
+            for (j = 0, k = interleave_index; j < buf->size; j += 2) {
+              zw_rescale                = this->audio_interleave_buffer[k++];
+              zw_rescale               *= this->audio_volume_left;
+              zw_rescale               /= max_volume;
+              zw_rescale               += 0x80;
+              buf->content[j]           = (zw_rescale>255) ? 255 : ((zw_rescale<0) ? 0 : zw_rescale);
+            }
+          }
+        } else {
+          for (j = 0; j < buf->size; j += 2) {
+            buf->content[j]             = 0;
+          }
+        }
+        if (this->chan_settings == STEREO ||
+            this->chan_settings == RIGHT  ||
+            this->chan_settings == PAN) {
+          if (this->chan_settings == STEREO)
+            k                           = interleave_index +
+                                          (this->data_size *
+                                           this->audio_compression_factor / 2);
+          else
+            k                           = interleave_index;
+          if( this->audio_volume_right == max_volume ) {
+            for (j = 1; j < buf->size; j += 2) {
+              buf->content[j]           = this->audio_interleave_buffer[k++] + 0x80;
+            }
+          } else {
+            for (j = 1; j < buf->size; j += 2) {
+              zw_rescale                = this->audio_interleave_buffer[k++];
+              zw_rescale               *= this->audio_volume_right;
+              zw_rescale               /= max_volume;
+              zw_rescale               += 0x80;
+              buf->content[j]           = (zw_rescale>255) ? 255 : ((zw_rescale<0) ? 0 : zw_rescale);
+            }
+          }
+        }
+      }
+      interleave_index                 += buf->size / this->audio_channels;
+
+      if (!remaining_sample_bytes)
+        buf->decoder_flags             |= BUF_FLAG_FRAME_END;
+
+      xprintf (this->stream->xine, XINE_VERBOSITY_LOG,
+               "sending audio buf with %d bytes, %lld pts, %d duration\n",
+               buf->size, buf->pts, buf->decoder_info[0]);
+      this->audio_fifo->put(this->audio_fifo, buf);
+    }
+    if (buf)
+      buf->free_buffer(buf);
+    this->status                        = DEMUX_FINISHED;
+  }
+
+  return this->status;
+}
+
+static void demux_iff_send_headers(demux_plugin_t *this_gen) {
+
+  demux_iff_t *this                     = (demux_iff_t *) this_gen;
+  buf_element_t *buf;
+
+  this->video_fifo                      = this->stream->video_fifo;
+  this->audio_fifo                      = this->stream->audio_fifo;
+
+  this->status                          = DEMUX_OK;
+
+  /* load stream information */
+  switch( this->iff_type ) {
+    case IFF_8SVX_CHUNK:
+      _x_stream_info_set(this->stream, XINE_STREAM_INFO_HAS_VIDEO, 0);
+      _x_stream_info_set(this->stream, XINE_STREAM_INFO_HAS_AUDIO, 1);
+      _x_stream_info_set(this->stream, XINE_STREAM_INFO_AUDIO_CHANNELS,
+                         this->audio_channels);
+      _x_stream_info_set(this->stream, XINE_STREAM_INFO_AUDIO_SAMPLERATE,
+                         this->vhdr_samplesPerSec);
+      _x_stream_info_set(this->stream, XINE_STREAM_INFO_AUDIO_BITS,
+                         this->audio_bits);
+      break;
+    case IFF_ANIM_CHUNK:
+    case IFF_ILBM_CHUNK:
+      _x_stream_info_set(this->stream, XINE_STREAM_INFO_HAS_VIDEO, 1);
+      _x_stream_info_set(this->stream, XINE_STREAM_INFO_HAS_AUDIO, 0);
+      break;
+    default:
+      _x_stream_info_set(this->stream, XINE_STREAM_INFO_HAS_VIDEO, 0);
+      _x_stream_info_set(this->stream, XINE_STREAM_INFO_HAS_AUDIO, 0);
+      break;
+  }
+
+  if( this->title )
+    _x_meta_info_set(this->stream, XINE_META_INFO_TITLE, this->title);
+
+  if( this->author )
+    _x_meta_info_set(this->stream, XINE_META_INFO_ARTIST, this->author);
+
+  if( this->annotations )
+    _x_meta_info_set(this->stream, XINE_META_INFO_COMMENT, this->annotations);
+
+  /* send start buffers */
+  _x_demux_control_start(this->stream);
+
+  /* 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->vhdr_samplesPerSec;
+    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);
+  }
+}
+
+static int demux_iff_seek (demux_plugin_t *this_gen,
+                           off_t start_pos, int start_time, int playing) {
+
+  demux_iff_t *this                     = (demux_iff_t *) this_gen;
+
+  this->seek_flag                       = 1;
+  this->status                          = DEMUX_OK;
+  _x_demux_flush_engine (this->stream);
+
+  /* if input is non-seekable, do not proceed with the rest of this
+   * seek function */
+  if (!INPUT_IS_SEEKABLE(this->input))
+    return this->status;
+
+  /* check the boundary offsets */
+  this->audio_position                  = (start_pos < 0) ? 0 :
+                                          ((start_pos >= this->data_size) ?
+                                           this->data_size : start_pos);
+  return this->status;
+}
+
+static void demux_iff_dispose (demux_plugin_t *this_gen) {
+  demux_iff_t *this                     = (demux_iff_t *) this_gen;
+
+  if( this->title )
+    free (this->title);
+  if( this->copyright )
+    free (this->copyright);
+  if( this->author )
+    free (this->author);
+  if( this->annotations )
+    free (this->annotations);
+  if( this->version )
+    free (this->version);
+
+  if( this->audio_interleave_buffer )
+    free (this->audio_interleave_buffer);
+  if( this->audio_read_buffer )
+    free (this->audio_read_buffer);
+  if( this->atak_eg_point )
+    free( this->atak_eg_point );
+  if( this->rlse_eg_point )
+    free( this->rlse_eg_point );
+  this->audio_buffer_filled             = 0;
+
+  free(this);
+}
+
+static int demux_iff_get_status (demux_plugin_t *this_gen) {
+  demux_iff_t *this                     = (demux_iff_t *) this_gen;
+
+  return this->status;
+}
+
+/* return the approximate length in miliseconds */
+static int demux_iff_get_stream_length (demux_plugin_t *this_gen) {
+  demux_iff_t *this                     = (demux_iff_t *) this_gen;
+
+  return this->running_time;
+}
+
+static uint32_t demux_iff_get_capabilities(demux_plugin_t *this_gen){
+  return DEMUX_CAP_NOCAP;
+}
+
+static int demux_iff_get_optional_data(demux_plugin_t *this_gen,
+					void *data, int data_type){
+  return DEMUX_OPTIONAL_UNSUPPORTED;
+}
+
+static demux_plugin_t *open_plugin (demux_class_t *class_gen, xine_stream_t *stream,
+                                    input_plugin_t *input) {
+
+  demux_iff_t   *this;
+
+  this                                  = xine_xmalloc (sizeof (demux_iff_t));
+  this->stream                          = stream;
+  this->input                           = input;
+
+  this->demux_plugin.send_headers       = demux_iff_send_headers;
+  this->demux_plugin.send_chunk         = demux_iff_send_chunk;
+  this->demux_plugin.seek               = demux_iff_seek;
+  this->demux_plugin.dispose            = demux_iff_dispose;
+  this->demux_plugin.get_status         = demux_iff_get_status;
+  this->demux_plugin.get_stream_length  = demux_iff_get_stream_length;
+  this->demux_plugin.get_capabilities   = demux_iff_get_capabilities;
+  this->demux_plugin.get_optional_data  = demux_iff_get_optional_data;
+  this->demux_plugin.demux_class        = class_gen;
+
+  this->status = DEMUX_FINISHED;
+
+  switch (stream->content_detection_method) {
+
+    case METHOD_BY_EXTENSION: {
+      char *extensions, *mrl;
+
+      mrl                               = input->get_mrl (input);
+      extensions                        = class_gen->get_extensions (class_gen);
+
+      if (!_x_demux_check_extension (mrl, extensions)) {
+        free (this);
+        return NULL;
+      }
+    }
+    /* falling through is intended */
+
+    case METHOD_BY_CONTENT:
+    case METHOD_EXPLICIT:
+
+      if (!open_iff_file(this)) {
+        free (this);
+        return NULL;
+      }
+
+      break;
+
+    default:
+      free (this);
+      return NULL;
+  }
+
+  return &this->demux_plugin;
+}
+
+static char *get_description (demux_class_t *this_gen) {
+  return "IFF demux plugin";
+}
+
+static char *get_identifier (demux_class_t *this_gen) {
+  return "IFF";
+}
+
+static char *get_extensions (demux_class_t *this_gen) {
+  return "iff svx";
+}
+
+static char *get_mimetypes (demux_class_t *this_gen) {
+  return "audio/x-8svx: 8svx: IFF-8svx Audio;"
+         "audio/8svx: 8svx: IFF-8svx Audio;";
+}
+
+static void class_dispose (demux_class_t *this_gen) {
+  demux_iff_class_t *this               = (demux_iff_class_t *) this_gen;
+
+  free (this);
+}
+
+static void *init_plugin (xine_t *xine, void *data) {
+  demux_iff_class_t     *this;
+
+  this = xine_xmalloc (sizeof (demux_iff_class_t));
+
+  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;
+
+  return this;
+}
+
+/*
+ * exported plugin catalog entry
+ */
+
+plugin_info_t xine_plugin_info[] = {
+  /* type, API, "name", version, special_info, init_function */
+  { PLUGIN_DEMUX, 23, "iff", XINE_VERSION_CODE, NULL, init_plugin },
+  { PLUGIN_NONE, 0, "", 0, NULL, NULL }
+};
+