tizen 2.4 releasetizen_2.4_mobile_releasesubmit/tizen_2.4/20151028.064345accepted/tizen/2.4/mobile/20151029.032640tizen_2.4accepted/tizen_2.4_mobile

1 files changed, 863 insertions, 0 deletions

diff --git a/gst/dvdlpcmdec/gstdvdlpcmdec.c b/gst/dvdlpcmdec/gstdvdlpcmdec.c
new file mode 100644
index 0000000..03024b7
--- /dev/null
+++ b/gst/dvdlpcmdec/gstdvdlpcmdec.c
@@ -0,0 +1,863 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * Copyright (C) <2005> Jan Schmidt <jan@noraisin.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+/* Element-Checklist-Version: TODO */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include <stdlib.h>
+#include <string.h>
+
+#include "gstdvdlpcmdec.h"
+#include <gst/audio/audio.h>
+
+GST_DEBUG_CATEGORY_STATIC (dvdlpcm_debug);
+#define GST_CAT_DEFAULT dvdlpcm_debug
+
+static GstStaticPadTemplate gst_dvdlpcmdec_sink_template =
+    GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-private1-lpcm; "
+        "audio/x-lpcm, "
+        "width = (int) { 16, 20, 24 }, "
+        "rate = (int) { 32000, 44100, 48000, 96000 }, "
+        "channels = (int) [ 1, 8 ], "
+        "dynamic_range = (int) [ 0, 255 ], "
+        "emphasis = (boolean) { TRUE, FALSE }, "
+        "mute = (boolean) { TRUE, FALSE } ")
+    );
+
+static GstStaticPadTemplate gst_dvdlpcmdec_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-raw, "
+        "format = (string) { S16BE, S24BE }, "
+        "layout = (string) interleaved, "
+        "rate = (int) { 32000, 44100, 48000, 96000 }, "
+        "channels = (int) [ 1, 8 ]")
+    );
+
+/* DvdLpcmDec signals and args */
+enum
+{
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum
+{
+  ARG_0
+      /* FILL ME */
+};
+
+static void gst_dvdlpcmdec_base_init (gpointer g_class);
+static void gst_dvdlpcmdec_class_init (GstDvdLpcmDecClass * klass);
+static void gst_dvdlpcmdec_init (GstDvdLpcmDec * dvdlpcmdec);
+
+static GstFlowReturn gst_dvdlpcmdec_chain_raw (GstPad * pad, GstObject * parent,
+    GstBuffer * buffer);
+static GstFlowReturn gst_dvdlpcmdec_chain_dvd (GstPad * pad, GstObject * parent,
+    GstBuffer * buffer);
+static gboolean gst_dvdlpcmdec_setcaps (GstPad * pad, GstCaps * caps);
+static gboolean dvdlpcmdec_sink_event (GstPad * pad, GstObject * parent,
+    GstEvent * event);
+
+static GstStateChangeReturn gst_dvdlpcmdec_change_state (GstElement * element,
+    GstStateChange transition);
+
+static GstElementClass *parent_class = NULL;
+
+GType
+gst_dvdlpcmdec_get_type (void)
+{
+  static GType dvdlpcmdec_type = 0;
+
+  if (!dvdlpcmdec_type) {
+    static const GTypeInfo dvdlpcmdec_info = {
+      sizeof (GstDvdLpcmDecClass),
+      gst_dvdlpcmdec_base_init,
+      NULL,
+      (GClassInitFunc) gst_dvdlpcmdec_class_init,
+      NULL,
+      NULL,
+      sizeof (GstDvdLpcmDec),
+      0,
+      (GInstanceInitFunc) gst_dvdlpcmdec_init,
+    };
+
+    dvdlpcmdec_type =
+        g_type_register_static (GST_TYPE_ELEMENT, "GstDvdLpcmDec",
+        &dvdlpcmdec_info, 0);
+  }
+  return dvdlpcmdec_type;
+}
+
+static void
+gst_dvdlpcmdec_base_init (gpointer g_class)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_dvdlpcmdec_sink_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_dvdlpcmdec_src_template));
+  gst_element_class_set_static_metadata (element_class,
+      "DVD LPCM Audio decoder", "Codec/Decoder/Audio",
+      "Decode DVD LPCM frames into standard PCM audio",
+      "Jan Schmidt <jan@noraisin.net>, Michael Smith <msmith@fluendo.com>");
+}
+
+static void
+gst_dvdlpcmdec_class_init (GstDvdLpcmDecClass * klass)
+{
+  GstElementClass *gstelement_class;
+
+  gstelement_class = (GstElementClass *) klass;
+
+  parent_class = g_type_class_peek_parent (klass);
+
+  gstelement_class->change_state = gst_dvdlpcmdec_change_state;
+}
+
+static void
+gst_dvdlpcm_reset (GstDvdLpcmDec * dvdlpcmdec)
+{
+  gst_audio_info_init (&dvdlpcmdec->info);
+  dvdlpcmdec->dynamic_range = 0;
+  dvdlpcmdec->emphasis = FALSE;
+  dvdlpcmdec->mute = FALSE;
+  dvdlpcmdec->timestamp = GST_CLOCK_TIME_NONE;
+
+  dvdlpcmdec->header = 0;
+
+  gst_segment_init (&dvdlpcmdec->segment, GST_FORMAT_UNDEFINED);
+}
+
+static void
+gst_dvdlpcmdec_init (GstDvdLpcmDec * dvdlpcmdec)
+{
+  dvdlpcmdec->sinkpad =
+      gst_pad_new_from_static_template (&gst_dvdlpcmdec_sink_template, "sink");
+  gst_pad_set_event_function (dvdlpcmdec->sinkpad, dvdlpcmdec_sink_event);
+  gst_element_add_pad (GST_ELEMENT (dvdlpcmdec), dvdlpcmdec->sinkpad);
+
+  dvdlpcmdec->srcpad =
+      gst_pad_new_from_static_template (&gst_dvdlpcmdec_src_template, "src");
+  gst_pad_use_fixed_caps (dvdlpcmdec->srcpad);
+  gst_element_add_pad (GST_ELEMENT (dvdlpcmdec), dvdlpcmdec->srcpad);
+
+  gst_dvdlpcm_reset (dvdlpcmdec);
+}
+
+static const GstAudioChannelPosition channel_positions[][8] = {
+  {GST_AUDIO_CHANNEL_POSITION_MONO},
+  {GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
+      GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT},
+  {GST_AUDIO_CHANNEL_POSITION_INVALID},
+  {GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
+        GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
+      GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT},
+  {GST_AUDIO_CHANNEL_POSITION_INVALID},
+  {GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
+        GST_AUDIO_CHANNEL_POSITION_LFE1, GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
+      GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT},
+  {GST_AUDIO_CHANNEL_POSITION_INVALID},
+  {GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
+        GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
+        GST_AUDIO_CHANNEL_POSITION_LFE1, GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
+        GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
+        GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
+      GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT},
+  {GST_AUDIO_CHANNEL_POSITION_INVALID}
+};
+
+static void
+gst_dvdlpcmdec_send_tags (GstDvdLpcmDec * dvdlpcmdec)
+{
+  GstTagList *taglist;
+  guint bitrate;
+  gint bpf, rate;
+
+  bpf = GST_AUDIO_INFO_BPF (&dvdlpcmdec->info);
+  rate = GST_AUDIO_INFO_RATE (&dvdlpcmdec->info);
+
+  bitrate = bpf * 8 * rate;
+
+  taglist = gst_tag_list_new (GST_TAG_AUDIO_CODEC, "LPCM Audio",
+      GST_TAG_BITRATE, bitrate, NULL);
+
+  gst_pad_push_event (dvdlpcmdec->srcpad, gst_event_new_tag (taglist));
+}
+
+static gboolean
+gst_dvdlpcmdec_set_outcaps (GstDvdLpcmDec * dvdlpcmdec)
+{
+  gboolean res = TRUE;
+  GstCaps *src_caps;
+
+  /* Build caps to set on the src pad, which we know from the incoming caps */
+  src_caps = gst_audio_info_to_caps (&dvdlpcmdec->info);
+
+  res = gst_pad_set_caps (dvdlpcmdec->srcpad, src_caps);
+  if (res) {
+    GST_DEBUG_OBJECT (dvdlpcmdec, "Successfully set output caps: %"
+        GST_PTR_FORMAT, src_caps);
+
+    gst_dvdlpcmdec_send_tags (dvdlpcmdec);
+  } else {
+    GST_DEBUG_OBJECT (dvdlpcmdec, "Failed to set output caps: %"
+        GST_PTR_FORMAT, src_caps);
+  }
+
+  gst_caps_unref (src_caps);
+
+  return res;
+}
+
+static gboolean
+gst_dvdlpcmdec_setcaps (GstPad * pad, GstCaps * caps)
+{
+  GstStructure *structure;
+  gboolean res = TRUE;
+  GstDvdLpcmDec *dvdlpcmdec;
+  GstAudioFormat format;
+  gint rate, channels, width;
+  const GstAudioChannelPosition *position;
+
+  g_return_val_if_fail (caps != NULL, FALSE);
+  g_return_val_if_fail (pad != NULL, FALSE);
+
+  dvdlpcmdec = GST_DVDLPCMDEC (gst_pad_get_parent (pad));
+
+  structure = gst_caps_get_structure (caps, 0);
+
+  /* If we have the DVD structured LPCM (including header) then we wait
+   * for incoming data before creating the output pad caps */
+  if (gst_structure_has_name (structure, "audio/x-private1-lpcm")) {
+    gst_pad_set_chain_function (dvdlpcmdec->sinkpad, gst_dvdlpcmdec_chain_dvd);
+    goto done;
+  }
+
+  gst_pad_set_chain_function (dvdlpcmdec->sinkpad, gst_dvdlpcmdec_chain_raw);
+
+  res &= gst_structure_get_int (structure, "rate", &rate);
+  res &= gst_structure_get_int (structure, "channels", &channels);
+  res &= gst_structure_get_int (structure, "width", &width);
+  res &= gst_structure_get_int (structure, "dynamic_range",
+      &dvdlpcmdec->dynamic_range);
+  res &= gst_structure_get_boolean (structure, "emphasis",
+      &dvdlpcmdec->emphasis);
+  res &= gst_structure_get_boolean (structure, "mute", &dvdlpcmdec->mute);
+
+  if (!res)
+    goto caps_parse_error;
+
+  switch (width) {
+    case 24:
+    case 20:
+      format = GST_AUDIO_FORMAT_S24BE;
+      break;
+    case 16:
+      format = GST_AUDIO_FORMAT_S16BE;
+      break;
+    default:
+      format = GST_AUDIO_FORMAT_UNKNOWN;
+      break;
+  }
+
+  gst_audio_info_set_format (&dvdlpcmdec->info, format, rate, channels, NULL);
+  if (channels < 9
+      && channel_positions[channels - 1][0] !=
+      GST_AUDIO_CHANNEL_POSITION_INVALID) {
+    dvdlpcmdec->info.flags &= ~GST_AUDIO_FLAG_UNPOSITIONED;
+    position = channel_positions[channels - 1];
+    dvdlpcmdec->lpcm_layout = position;
+    memcpy (dvdlpcmdec->info.position, position,
+        sizeof (GstAudioChannelPosition) * channels);
+    gst_audio_channel_positions_to_valid_order (dvdlpcmdec->info.position,
+        channels);
+  }
+
+  dvdlpcmdec->width = width;
+
+  res = gst_dvdlpcmdec_set_outcaps (dvdlpcmdec);
+
+done:
+  gst_object_unref (dvdlpcmdec);
+  return res;
+
+  /* ERRORS */
+caps_parse_error:
+  {
+    GST_DEBUG_OBJECT (dvdlpcmdec, "Couldn't get parameters; missing caps?");
+    gst_object_unref (dvdlpcmdec);
+    return FALSE;
+  }
+}
+
+static void
+update_timestamps (GstDvdLpcmDec * dvdlpcmdec, GstBuffer * buf, int samples)
+{
+  gboolean take_buf_ts = FALSE;
+  gint rate;
+
+  rate = GST_AUDIO_INFO_RATE (&dvdlpcmdec->info);
+
+  GST_BUFFER_DURATION (buf) = gst_util_uint64_scale (samples, GST_SECOND, rate);
+
+  if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
+    if (GST_CLOCK_TIME_IS_VALID (dvdlpcmdec->timestamp)) {
+      GstClockTimeDiff one_sample = GST_SECOND / rate;
+      GstClockTimeDiff diff = GST_CLOCK_DIFF (GST_BUFFER_TIMESTAMP (buf),
+          dvdlpcmdec->timestamp);
+
+      if (diff > one_sample || diff < -one_sample)
+        take_buf_ts = TRUE;
+    } else {
+      take_buf_ts = TRUE;
+    }
+  } else if (!GST_CLOCK_TIME_IS_VALID (dvdlpcmdec->timestamp)) {
+    dvdlpcmdec->timestamp = 0;
+  }
+
+  if (take_buf_ts) {
+    /* Take buffer timestamp */
+    dvdlpcmdec->timestamp = GST_BUFFER_TIMESTAMP (buf);
+  } else {
+    GST_BUFFER_TIMESTAMP (buf) = dvdlpcmdec->timestamp;
+  }
+
+  dvdlpcmdec->timestamp += GST_BUFFER_DURATION (buf);
+
+  GST_LOG_OBJECT (dvdlpcmdec, "Updated timestamp to %" GST_TIME_FORMAT,
+      GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
+}
+
+static void
+parse_header (GstDvdLpcmDec * dec, guint32 header)
+{
+  GstAudioFormat format;
+  gint rate, channels, width;
+
+  /* We don't actually use 'dynamic range', 'mute', or 'emphasis' currently,
+   * but parse them out */
+  dec->dynamic_range = header & 0xff;
+
+  dec->mute = (header & 0x400000) != 0;
+  dec->emphasis = (header & 0x800000) != 0;
+
+  /* These two bits tell us the bit depth */
+  switch (header & 0xC000) {
+    case 0x8000:
+      /* 24 bits in 3 bytes */
+      format = GST_AUDIO_FORMAT_S24BE;
+      width = 24;
+      break;
+    case 0x4000:
+      /* 20 bits in 3 bytes */
+      format = GST_AUDIO_FORMAT_S24BE;
+      width = 20;
+      break;
+    default:
+      format = GST_AUDIO_FORMAT_S16BE;
+      width = 16;
+      break;
+  }
+
+  dec->width = width;
+
+  /* Only four sample rates supported */
+  switch (header & 0x3000) {
+    case 0x0000:
+      rate = 48000;
+      break;
+    case 0x1000:
+      rate = 96000;
+      break;
+    case 0x2000:
+      rate = 44100;
+      break;
+    case 0x3000:
+      rate = 32000;
+      break;
+    default:
+      rate = 0;
+      break;
+  }
+
+  /* And, of course, the number of channels (up to 8) */
+  channels = ((header >> 8) & 0x7) + 1;
+
+  gst_audio_info_set_format (&dec->info, format, rate, channels, NULL);
+  if (channels < 9
+      && channel_positions[channels - 1][0] !=
+      GST_AUDIO_CHANNEL_POSITION_INVALID) {
+    const GstAudioChannelPosition *position;
+
+    dec->info.flags &= ~GST_AUDIO_FLAG_UNPOSITIONED;
+    position = channel_positions[channels - 1];
+    dec->lpcm_layout = position;
+    memcpy (dec->info.position, position,
+        sizeof (GstAudioChannelPosition) * channels);
+    gst_audio_channel_positions_to_valid_order (dec->info.position, channels);
+  }
+}
+
+static GstFlowReturn
+gst_dvdlpcmdec_chain_dvd (GstPad * pad, GstObject * parent, GstBuffer * buf)
+{
+  GstDvdLpcmDec *dvdlpcmdec;
+  GstMapInfo map;
+  guint8 *data;
+  gsize size;
+  guint first_access;
+  guint32 header;
+  GstBuffer *subbuf;
+  GstFlowReturn ret = GST_FLOW_OK;
+  gint off, len;
+  gint rate, channels;
+
+  dvdlpcmdec = GST_DVDLPCMDEC (parent);
+
+  gst_buffer_map (buf, &map, GST_MAP_READ);
+  data = map.data;
+  size = map.size;
+
+  if (size < 5)
+    goto too_small;
+
+  /* We have a 5 byte header, now.
+   * The first two bytes are a (big endian) 16 bit offset into our buffer.
+   * The buffer timestamp refers to this offset.
+   *
+   * The other three bytes are a (big endian) number in which the header is
+   * encoded.
+   */
+  first_access = (data[0] << 8) | data[1];
+  if (first_access > size)
+    goto invalid_data;
+
+  /* Don't keep the 'frame number' low 5 bits of the first byte */
+  header = ((data[2] & 0xC0) << 16) | (data[3] << 8) | data[4];
+
+  /* see if we have a new header */
+  if (header != dvdlpcmdec->header) {
+    parse_header (dvdlpcmdec, header);
+
+    if (!gst_dvdlpcmdec_set_outcaps (dvdlpcmdec))
+      goto negotiation_failed;
+
+    dvdlpcmdec->header = header;
+  }
+
+  GST_LOG_OBJECT (dvdlpcmdec, "first_access %d, buffer length %" G_GSIZE_FORMAT,
+      first_access, size);
+
+  rate = GST_AUDIO_INFO_RATE (&dvdlpcmdec->info);
+  channels = GST_AUDIO_INFO_CHANNELS (&dvdlpcmdec->info);
+
+  /* After first_access, we have an additional 3 bytes of data we've parsed and
+   * don't want to handle; this is included within the value of first_access.
+   * So a first_access value of between 1 and 3 is just broken, we treat that
+   * the same as zero. first_access == 4 means we only need to create a single
+   * sub-buffer, greater than that we need to create two. */
+
+  /* skip access unit bytes and info */
+  off = 5;
+
+  if (first_access > 4) {
+    guint samples = 0;
+    GstClockTime ts;
+
+    /* length of first buffer */
+    len = first_access - 4;
+
+    GST_LOG_OBJECT (dvdlpcmdec, "Creating first sub-buffer off %d, len %d",
+        off, len);
+
+    /* see if we need a subbuffer without timestamp */
+    if (off + len > size)
+      goto bad_first_access;
+
+    subbuf = gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, off, len);
+
+    /* If we don't have a stored timestamp from the last packet,
+     * (it's straight after a new-segment, but we have one on the
+     * first access buffer, then calculate the timestamp to align
+     * this buffer to just before the first_access buffer */
+    if (!GST_CLOCK_TIME_IS_VALID (dvdlpcmdec->timestamp) &&
+        GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
+      switch (dvdlpcmdec->width) {
+        case 16:
+          samples = len / channels / 2;
+          break;
+        case 20:
+          samples = (len / channels) * 2 / 5;
+          break;
+        case 24:
+          samples = len / channels / 3;
+          break;
+      }
+    }
+    if (samples != 0) {
+      ts = gst_util_uint64_scale (samples, GST_SECOND, rate);
+      if (ts < GST_BUFFER_TIMESTAMP (buf))
+        GST_BUFFER_TIMESTAMP (subbuf) = GST_BUFFER_TIMESTAMP (buf) - ts;
+      else
+        GST_BUFFER_TIMESTAMP (subbuf) = 0;
+    } else {
+      GST_BUFFER_TIMESTAMP (subbuf) = GST_CLOCK_TIME_NONE;
+    }
+
+    ret = gst_dvdlpcmdec_chain_raw (pad, parent, subbuf);
+    if (ret != GST_FLOW_OK)
+      goto done;
+
+    /* then the buffer with new timestamp */
+    off += len;
+    len = size - off;
+
+    GST_LOG_OBJECT (dvdlpcmdec, "Creating next sub-buffer off %d, len %d", off,
+        len);
+
+    if (len > 0) {
+      subbuf = gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, off, len);
+      GST_BUFFER_TIMESTAMP (subbuf) = GST_BUFFER_TIMESTAMP (buf);
+
+      ret = gst_dvdlpcmdec_chain_raw (pad, parent, subbuf);
+    }
+  } else {
+    GST_LOG_OBJECT (dvdlpcmdec,
+        "Creating single sub-buffer off %d, len %" G_GSIZE_FORMAT, off,
+        size - off);
+    subbuf = gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, off, size - off);
+    GST_BUFFER_TIMESTAMP (subbuf) = GST_BUFFER_TIMESTAMP (buf);
+    ret = gst_dvdlpcmdec_chain_raw (pad, parent, subbuf);
+  }
+
+done:
+  gst_buffer_unmap (buf, &map);
+  gst_buffer_unref (buf);
+
+  return ret;
+
+  /* ERRORS */
+too_small:
+  {
+    /* Buffer is too small */
+    GST_ELEMENT_WARNING (dvdlpcmdec, STREAM, DECODE,
+        ("Invalid data found parsing LPCM packet"),
+        ("LPCM packet was too small. Dropping"));
+    ret = GST_FLOW_OK;
+    goto done;
+  }
+invalid_data:
+  {
+    GST_ELEMENT_WARNING (dvdlpcmdec, STREAM, DECODE,
+        ("Invalid data found parsing LPCM packet"),
+        ("LPCM packet contained invalid first access. Dropping"));
+    ret = GST_FLOW_OK;
+    goto done;
+  }
+negotiation_failed:
+  {
+    GST_ELEMENT_ERROR (dvdlpcmdec, STREAM, FORMAT, (NULL),
+        ("Failed to configure output format"));
+    ret = GST_FLOW_NOT_NEGOTIATED;
+    goto done;
+  }
+bad_first_access:
+  {
+    GST_WARNING_OBJECT (pad, "Bad first_access parameter in buffer");
+    GST_ELEMENT_ERROR (dvdlpcmdec, STREAM, DECODE,
+        (NULL),
+        ("first_access parameter out of range: bad buffer from demuxer"));
+    ret = GST_FLOW_ERROR;
+    goto done;
+  }
+}
+
+static GstFlowReturn
+gst_dvdlpcmdec_chain_raw (GstPad * pad, GstObject * parent, GstBuffer * buf)
+{
+  GstDvdLpcmDec *dvdlpcmdec;
+  gsize size;
+  GstFlowReturn ret;
+  guint samples = 0;
+  gint rate, channels;
+
+  dvdlpcmdec = GST_DVDLPCMDEC (parent);
+
+  size = gst_buffer_get_size (buf);
+
+  GST_LOG_OBJECT (dvdlpcmdec,
+      "got buffer %p of size %" G_GSIZE_FORMAT " with ts %" GST_TIME_FORMAT,
+      buf, size, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
+
+  rate = GST_AUDIO_INFO_RATE (&dvdlpcmdec->info);
+  channels = GST_AUDIO_INFO_CHANNELS (&dvdlpcmdec->info);
+
+  if (rate == 0)
+    goto not_negotiated;
+
+  if (GST_BUFFER_TIMESTAMP_IS_VALID (buf))
+    dvdlpcmdec->timestamp = GST_BUFFER_TIMESTAMP (buf);
+
+  /* We don't currently do anything at all regarding emphasis, mute or
+   * dynamic_range - I'm not sure what they're for */
+  switch (dvdlpcmdec->width) {
+    case 16:
+    {
+      /* We can just pass 16-bits straight through intact, once we set
+       * appropriate things on the buffer */
+      samples = size / channels / 2;
+      if (samples < 1)
+        goto drop;
+      buf = gst_buffer_make_writable (buf);
+      break;
+    }
+    case 20:
+    {
+      /* Allocate a new buffer and copy 20-bit width to 24-bit */
+      gint64 samples = size * 8 / 20;
+      gint64 count = size / 10;
+      gint64 i;
+      GstMapInfo srcmap, destmap;
+      guint8 *src;
+      guint8 *dest;
+      GstBuffer *outbuf;
+
+      if (samples < 1)
+        goto drop;
+
+      outbuf = gst_buffer_new_allocate (NULL, samples * 3, NULL);
+      gst_buffer_copy_into (outbuf, buf, GST_BUFFER_COPY_TIMESTAMPS, 0, -1);
+
+      /* adjust samples so we can calc the new timestamp */
+      samples = samples / channels;
+
+      gst_buffer_map (buf, &srcmap, GST_MAP_READ);
+      gst_buffer_map (outbuf, &destmap, GST_MAP_WRITE);
+      src = srcmap.data;
+      dest = destmap.data;
+
+      /* Copy 20-bit LPCM format to 24-bit buffers, with 0x00 in the lowest
+       * nibble. Note that the first 2 bytes are already correct */
+      for (i = 0; i < count; i++) {
+        dest[0] = src[0];
+        dest[1] = src[1];
+        dest[2] = src[8] & 0xf0;
+        dest[3] = src[2];
+        dest[4] = src[3];
+        dest[5] = (src[8] & 0x0f) << 4;
+        dest[6] = src[4];
+        dest[7] = src[5];
+        dest[8] = src[9] & 0x0f;
+        dest[9] = src[6];
+        dest[10] = src[7];
+        dest[11] = (src[9] & 0x0f) << 4;
+
+        src += 10;
+        dest += 12;
+      }
+      gst_buffer_unmap (outbuf, &destmap);
+      gst_buffer_unmap (buf, &srcmap);
+      gst_buffer_unref (buf);
+      buf = outbuf;
+      break;
+    }
+    case 24:
+    {
+      /* Rearrange 24-bit LPCM format in-place. Note that the first 2
+       * and last byte are already correct */
+      guint count = size / 12;
+      gint i;
+      GstMapInfo map;
+      guint8 *ptr;
+
+      samples = size / channels / 3;
+
+      if (samples < 1)
+        goto drop;
+
+      /* Ensure our output buffer is writable */
+      buf = gst_buffer_make_writable (buf);
+
+      gst_buffer_map (buf, &map, GST_MAP_READWRITE);
+      ptr = map.data;
+
+      for (i = 0; i < count; i++) {
+        guint8 tmp;
+
+        tmp = ptr[10];
+        ptr[10] = ptr[7];
+        ptr[7] = ptr[5];
+        ptr[5] = ptr[9];
+        ptr[9] = ptr[6];
+        ptr[6] = ptr[4];
+        ptr[4] = ptr[3];
+        ptr[3] = ptr[2];
+        ptr[2] = ptr[8];
+        ptr[8] = tmp;
+
+        ptr += 12;
+      }
+      gst_buffer_unmap (buf, &map);
+      break;
+    }
+    default:
+      goto invalid_width;
+  }
+
+  update_timestamps (dvdlpcmdec, buf, samples);
+
+  if (dvdlpcmdec->lpcm_layout)
+    gst_audio_buffer_reorder_channels (buf, dvdlpcmdec->info.finfo->format,
+        dvdlpcmdec->info.channels, dvdlpcmdec->lpcm_layout,
+        dvdlpcmdec->info.position);
+
+  ret = gst_pad_push (dvdlpcmdec->srcpad, buf);
+
+done:
+  return ret;
+
+  /* ERRORS */
+drop:
+  {
+    GST_DEBUG_OBJECT (dvdlpcmdec,
+        "Buffer of size %" G_GSIZE_FORMAT " is too small. Dropping", size);
+    gst_buffer_unref (buf);
+    ret = GST_FLOW_OK;
+    goto done;
+  }
+not_negotiated:
+  {
+    GST_ELEMENT_ERROR (dvdlpcmdec, STREAM, FORMAT, (NULL),
+        ("Buffer pushed before negotiation"));
+    gst_buffer_unref (buf);
+    ret = GST_FLOW_NOT_NEGOTIATED;
+    goto done;
+  }
+invalid_width:
+  {
+    GST_ELEMENT_ERROR (dvdlpcmdec, STREAM, WRONG_TYPE, (NULL),
+        ("Invalid sample width configured"));
+    gst_buffer_unref (buf);
+    ret = GST_FLOW_NOT_NEGOTIATED;
+    goto done;
+  }
+}
+
+static gboolean
+dvdlpcmdec_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
+{
+  GstDvdLpcmDec *dvdlpcmdec;
+  gboolean res;
+
+  dvdlpcmdec = GST_DVDLPCMDEC (parent);
+
+  switch (GST_EVENT_TYPE (event)) {
+    case GST_EVENT_CAPS:
+    {
+      GstCaps *caps;
+
+      gst_event_parse_caps (event, &caps);
+      res = gst_dvdlpcmdec_setcaps (pad, caps);
+      gst_event_unref (event);
+      break;
+    }
+    case GST_EVENT_SEGMENT:
+    {
+      GstSegment seg;
+
+      gst_event_copy_segment (event, &seg);
+
+      GST_DEBUG_OBJECT (dvdlpcmdec, "segment %" GST_SEGMENT_FORMAT, &seg);
+
+      dvdlpcmdec->segment = seg;
+
+      if (seg.format == GST_FORMAT_TIME) {
+        dvdlpcmdec->timestamp = GST_CLOCK_TIME_NONE;
+      } else {
+        dvdlpcmdec->timestamp = 0;
+      }
+      res = gst_pad_push_event (dvdlpcmdec->srcpad, event);
+      break;
+    }
+    case GST_EVENT_FLUSH_STOP:
+      gst_segment_init (&dvdlpcmdec->segment, GST_FORMAT_UNDEFINED);
+      res = gst_pad_push_event (dvdlpcmdec->srcpad, event);
+      break;
+    default:
+      res = gst_pad_push_event (dvdlpcmdec->srcpad, event);
+      break;
+  }
+
+  return res;
+}
+
+static GstStateChangeReturn
+gst_dvdlpcmdec_change_state (GstElement * element, GstStateChange transition)
+{
+  GstDvdLpcmDec *dvdlpcmdec = GST_DVDLPCMDEC (element);
+  GstStateChangeReturn res;
+
+  switch (transition) {
+    case GST_STATE_CHANGE_READY_TO_PAUSED:
+      gst_dvdlpcm_reset (dvdlpcmdec);
+      break;
+    default:
+      break;
+  }
+
+  res = parent_class->change_state (element, transition);
+
+  switch (transition) {
+    default:
+      break;
+  }
+
+  return res;
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  GST_DEBUG_CATEGORY_INIT (dvdlpcm_debug, "dvdlpcmdec", 0, "DVD LPCM Decoder");
+
+  if (!gst_element_register (plugin, "dvdlpcmdec", GST_RANK_PRIMARY,
+          GST_TYPE_DVDLPCMDEC)) {
+    return FALSE;
+  }
+
+  return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    dvdlpcmdec,
+    "Decode DVD LPCM frames into standard PCM",
+    plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);