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gst-plugins-nuvdemux/nuvdemux/gstnuvdemux.c
author melunko
Tue Jan 30 21:25:36 2007 +0000 (2007-01-30)
branchtrunk
changeset 314 15f6102ef37d
parent 251 9f0346db9a46
child 318 0944bea397f9
permissions -rw-r--r--
[svn r315] Removed unused comments 
     1 /* GStreamer

     2  * Copyright (C) <2006> Renato Araujo Oliveira Filho <renato.filho@indt.org.br>

     3  *                      Rosfran Borges <rosfran.borges@indt.org.br>

     4  *

     5  * This library is free software; you can redistribute it and/or

     6  * modify it under the terms of the GNU Library General Public

     7  * License as published by the Free Software Foundation; either

     8  * version 2 of the License, or (at your option) any later version.

     9  *

    10  * This library is distributed in the hope that it will be useful,

    11  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    13  * Library General Public License for more details.

    14  *

    15  * You should have received a copy of the GNU Library General Public

    16  * License along with this library; if not, write to the

    17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

    18  * Boston, MA 02111-1307, USA.

    19  */

    20 /* Element-Checklist-Version: 5 */

    21 

    22 /**

    23  * SECTION:element-nuvdemux

    24  *

    25  * <refsect2>

    26  * <para>

    27  * Demuxes an .nuv file into raw or compressed audio and/or video streams.

    28  * </para>

    29  * <para>

    30  * This element currently only supports pull-based scheduling.

    31  * </para>

    32  * <title>Example launch line</title>

    33  * <para>

    34  * <programlisting>

    35  * gst-launch filesrc test.nuv ! nuvdemux name=demux  demux.audio_00 ! decodebin ! audioconvert ! audioresample ! autoaudiosink   demux.video_00 ! queue ! decodebin ! ffmpegcolorspace ! videoscale ! autovideosink

    36  * </programlisting>

    37  * Play (parse and decode) an .nuv file and try to output it to

    38  * an automatically detected soundcard and videosink. If the NUV file contains

    39  * compressed audio or video data, this will only work if you have the

    40  * right decoder elements/plugins installed.

    41  * </para>

    42  * </refsect2>

    43  *

    44  */

    45 

    46 #ifdef HAVE_CONFIG_H

    47 #include "config.h"

    48 #endif

    49 

    50 #include <gst/gst.h>

    51 #include <gst/gsterror.h>

    52 #include <gst/gstplugin.h>

    53 #include <string.h>

    54 #include <math.h>

    55 

    56 #include "glib/gi18n.h"

    57 #include "gstnuvdemux.h"

    58 

    59 #define GST_NUV_DEMUX_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_NUV_DEMUX, GstNuvDemuxPrivate))

    60 

    61 GST_DEBUG_CATEGORY_STATIC (nuvdemux_debug);

    62 #define GST_CAT_DEFAULT nuvdemux_debug

    63 #define GST_FLOW_ERROR_NO_DATA  -101

    64 

    65 enum

    66 {

    67    NUV_PUSH_MODE = 0,

    68    NUV_PULL_MODE

    69 };

    70 

    71 GST_DEBUG_CATEGORY_EXTERN (GST_CAT_EVENT);

    72 

    73 static const GstElementDetails gst_nuv_demux_details =

    74 GST_ELEMENT_DETAILS ("Nuv demuxer",

    75     "Codec/Demuxer",

    76     "Demultiplex a .nuv file into audio and video",

    77     "Renato Araujo Oliveira Filho <renato.filho@indt.org.br>,"

    78     "Rosfran Borges <rosfran.borges@indt.org.br>");

    79 

    80 

    81 /* file header */

    82 typedef struct

    83 {

    84     gchar id[12];       /* "NuppelVideo\0" or "MythTVVideo\0" */

    85     gchar version[5];    /* "x.xx\0" */

    86 

    87     gint  i_width;

    88     gint  i_height;

    89     gint  i_width_desired;

    90     gint  i_height_desired;

    91 

    92     gchar i_mode;            /* P progressive, I interlaced */

    93 

    94     gdouble  d_aspect;       /* 1.0 squared pixel */

    95     gdouble  d_fps;

    96     //fps num/denom

    97     gint     i_fpsn;

    98     gint     i_fpsd;

    99 

   100     gint     i_video_blocks; /* 0 no video, -1 unknown */

   101     gint     i_audio_blocks;

   102     gint     i_text_blocks;

   103 

   104     gint     i_keyframe_distance;

   105 

   106 } nuv_header;

   107 

   108 /* frame header */

   109 typedef struct

   110 {

   111     gchar i_type;        /* A: audio, V: video, S: sync; T: test

   112                            R: Seekpoint (string:RTjjjjjjjj)

   113                            D: Extra data for codec */

   114     gchar i_compression; /* V: 0 uncompressed

   115                               1 RTJpeg

   116                               2 RTJpeg+lzo

   117                               N black frame

   118                               L copy last

   119                            A: 0 uncompressed (44100 1-bits, 2ch)

   120                               1 lzo

   121                               2 layer 2

   122                               3 layer 3

   123                               F flac

   124                               S shorten

   125                               N null frame loudless

   126                               L copy last

   127                             S: B audio and vdeo sync point

   128                                A audio sync info (timecode == effective

   129                                     dsp frequency*100)

   130                                V next video sync (timecode == next video

   131                                     frame num)

   132                                S audio,video,text correlation */

   133     gchar i_keyframe;    /* 0 keyframe, else no no key frame */

   134     guint8 i_filters;  /* 0x01: gauss 5 pixel (8,2,2,2,2)/16

   135                            0x02: gauss 5 pixel (8,1,1,1,1)/12

   136                            0x04: cartoon filter */

   137 

   138     gint32 i_timecode;     /* ms */

   139 

   140     gint i_length;       /* V,A,T: length of following data

   141                            S: length of packet correl */

   142 } nuv_frame_header;

   143 

   144 /* FIXME Not sure of this one */

   145 typedef struct

   146 {

   147     gint             i_version;

   148     guint32		     i_video_fcc;

   149 

   150     guint32		     i_audio_fcc;

   151     gint             i_audio_sample_rate;

   152     gint             i_audio_bits_per_sample;

   153     gint             i_audio_channels;

   154     gint             i_audio_compression_ratio;

   155     gint             i_audio_quality;

   156     gint             i_rtjpeg_quality;

   157     gint             i_rtjpeg_luma_filter;

   158     gint             i_rtjpeg_chroma_filter;

   159     gint             i_lavc_bitrate;

   160     gint             i_lavc_qmin;

   161     gint             i_lavc_qmax;

   162     gint             i_lavc_maxqdiff;

   163     gint64         	 i_seekable_offset;

   164     gint64           i_keyframe_adjust_offset;

   165 

   166 } nuv_extended_header;

   167 

   168 typedef enum {

   169   GST_NUV_DEMUX_START,

   170   GST_NUV_DEMUX_HEADER_DATA,

   171   GST_NUV_DEMUX_EXTRA_DATA,

   172   GST_NUV_DEMUX_MPEG_DATA,

   173   GST_NUV_DEMUX_EXTEND_HEADER,

   174   GST_NUV_DEMUX_EXTEND_HEADER_DATA,

   175   GST_NUV_DEMUX_FRAME_HEADER,

   176   GST_NUV_DEMUX_MOVI,

   177   GST_NUV_DEMUX_INVALID_DATA

   178 } GstNuvDemuxState;

   179 

   180 struct _GstNuvDemuxPrivate {

   181   /* used for indicate the mode */

   182   guint         mode;

   183 

   184   /* used on push mode */

   185   GstAdapter    *adapter;

   186 

   187   /* pads */

   188   GstPad        *sinkpad;

   189   GstPad        *src_video_pad;

   190   GstPad        *src_audio_pad;

   191 

   192   /* Flow control */

   193   GstFlowReturn last_video_return;

   194   GstFlowReturn last_audio_return;

   195   gboolean      more_data;

   196 

   197   /* NUV decoding state */

   198   GstNuvDemuxState  state;

   199   GstSegment        segment;

   200   guint64           last_update;

   201   guint64           offset;

   202   guint64           streamer_offset;

   203 

   204   /* duration information */

   205   gint64            duration_bytes;

   206   gint64            duration_time;

   207   gint64            duration_average;

   208 

   209   /* segment control info */

   210   gboolean          new_audio_segment;

   211   gboolean          new_video_segment;

   212 

   213   /* Mpeg ExtraData */

   214   guint64       mpeg_data_size;

   215   GstBuffer     *mpeg_buffer;

   216 

   217   /* Headers */

   218   nuv_header h;

   219   nuv_extended_header eh;

   220   nuv_frame_header fh;

   221 

   222   /* anothers info */

   223   gint64            time_start;

   224   gint64            time_diff;

   225   gint64            time_qos;

   226   guint64           last_frame_time;

   227 };

   228 

   229 

   230 static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",

   231     GST_PAD_SINK,

   232     GST_PAD_ALWAYS,

   233     GST_STATIC_CAPS ("video/x-nuv"));

   234 

   235 static GstStaticPadTemplate audio_src_template =

   236 GST_STATIC_PAD_TEMPLATE ("audio_src",

   237     GST_PAD_SRC,

   238     GST_PAD_SOMETIMES,

   239     GST_STATIC_CAPS_ANY);

   240 

   241 static GstStaticPadTemplate video_src_template =

   242 GST_STATIC_PAD_TEMPLATE ("video_src",

   243     GST_PAD_SRC,

   244     GST_PAD_SOMETIMES,

   245     GST_STATIC_CAPS_ANY);

   246 

   247 static void gst_nuv_demux_dispose (GObject * object);

   248 static void gst_nuv_demux_finalize (GObject * object);

   249 static GstStateChangeReturn gst_nuv_demux_change_state (GstElement * element,

   250     GstStateChange transition);

   251 static void gst_nuv_demux_loop (GstPad * pad);

   252 static GstFlowReturn gst_nuv_demux_chain (GstPad * pad, GstBuffer * buf);

   253 static GstFlowReturn gst_nuv_demux_play (GstPad * pad);

   254 static gboolean gst_nuv_demux_sink_activate_pull (GstPad * sinkpad,

   255     gboolean active);

   256 static gboolean gst_nuv_demux_sink_activate_push (GstPad * pad,

   257     gboolean active);

   258 static gboolean gst_nuv_demux_sink_activate (GstPad * sinkpad);

   259 static gboolean gst_nuv_demux_sink_event    (GstPad *pad, GstEvent *event);

   260 static GstFlowReturn gst_nuv_demux_read_bytes (GstNuvDemux * nuv, guint64 size,

   261     gboolean move, GstBuffer ** buffer);

   262 static void gst_nuv_demux_reset (GstNuvDemux * nuv);

   263 static void gst_nuv_demux_destoy_src_pad (GstNuvDemux * nuv);

   264 static void gst_nuv_demux_send_eos (GstNuvDemux * nuv);

   265 static void gst_nuv_demux_update_duration (GstNuvDemux *nuv, guint64 current_timestamp);

   266 static gint64 gst_nuv_demux_get_bytes_duration (GstNuvDemux *nuv);

   267 static gint64 gst_nuv_demux_get_time_duration (GstNuvDemux *nuv);

   268 

   269 #if (GST_VERSION_MINOR == 10) && (GST_VERSION_MICRO < 6) 

   270 GstBuffer * gst_adapter_take_buffer (GstAdapter * adapter, guint nbytes);

   271 #endif

   272 

   273 

   274 GST_BOILERPLATE (GstNuvDemux, gst_nuv_demux, GstElement, GST_TYPE_ELEMENT);

   275 

   276 /******************************************************************************

   277  * Utils function

   278  ******************************************************************************/

   279 #if G_BYTE_ORDER == G_BIG_ENDIAN

   280 static inline gdouble

   281 _gdouble_swap_le_be (gdouble * d)

   282 {

   283   union

   284   {

   285     guint64 i;

   286     gdouble d;

   287   } u;

   288 

   289   u.d = *d;

   290   u.i = GUINT64_SWAP_LE_BE (u.i);

   291   return u.d;

   292 }

   293 

   294 #define READ_DOUBLE_FROM_LE(d) (_gdouble_swap_le_be((gdouble* ) d))

   295 #else /* G_BYTE_ORDER != G_BIG_ENDIAN */

   296 #define READ_DOUBLE_FROM_LE(d) *((gdouble* ) (d))

   297 #endif /* G_BYTE_ORDER != G_BIG_ENDIAN */

   298 

   299 static void

   300 double2fraction (double in, int *num, int *denom)

   301 {

   302     if (in == 29.97) {

   303         *num = 30000;

   304         *denom = 1001;

   305     } else if (in == 23.976) {

   306         *num = 24000;

   307         *denom = 1001;

   308     } else {

   309         *denom = 1;

   310         while (in - floor(in) >= 0.1) {

   311             *denom *= 10;

   312             in *= 10.0;

   313         }

   314         *num = (int)floor(in);

   315     }

   316 }

   317 

   318 /* GObject Functions */

   319 

   320 static void

   321 gst_nuv_demux_base_init (gpointer klass)

   322 {

   323   GstElementClass *element_class = GST_ELEMENT_CLASS (klass);

   324 

   325   gst_element_class_add_pad_template (element_class,

   326       gst_static_pad_template_get (&audio_src_template));

   327 

   328   gst_element_class_add_pad_template (element_class,

   329       gst_static_pad_template_get (&video_src_template));

   330 

   331   gst_element_class_add_pad_template (element_class,

   332       gst_static_pad_template_get (&sink_template));

   333   gst_element_class_set_details (element_class, &gst_nuv_demux_details);

   334 }

   335 

   336 static void

   337 gst_nuv_demux_class_init (GstNuvDemuxClass * klass)

   338 {

   339   GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);

   340   GObjectClass *gobject_class = (GObjectClass *) klass;

   341 

   342   GST_DEBUG_CATEGORY_INIT (nuvdemux_debug, "nuvdemux",

   343       0, "Demuxer for NUV streams");

   344 

   345   parent_class = g_type_class_peek_parent (klass);

   346 

   347   gobject_class->dispose = gst_nuv_demux_dispose;

   348   gobject_class->finalize = gst_nuv_demux_finalize;

   349   gstelement_class->change_state = gst_nuv_demux_change_state;

   350 

   351   g_type_class_add_private (gobject_class, sizeof (GstNuvDemuxPrivate));

   352 }

   353 

   354 static void

   355 gst_nuv_demux_init (GstNuvDemux * nuv, GstNuvDemuxClass * nuv_class)

   356 {

   357   nuv->priv = GST_NUV_DEMUX_GET_PRIVATE (nuv);

   358   nuv->priv->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink");

   359   gst_pad_set_activate_function (nuv->priv->sinkpad, gst_nuv_demux_sink_activate);

   360   gst_pad_set_activatepull_function (nuv->priv->sinkpad,

   361       gst_nuv_demux_sink_activate_pull);

   362   gst_pad_set_activatepush_function (nuv->priv->sinkpad,

   363       gst_nuv_demux_sink_activate_push);

   364   gst_pad_set_chain_function (nuv->priv->sinkpad,

   365       GST_DEBUG_FUNCPTR (gst_nuv_demux_chain));

   366   gst_pad_set_event_function (nuv->priv->sinkpad,

   367       gst_nuv_demux_sink_event);

   368   gst_element_add_pad (GST_ELEMENT (nuv), nuv->priv->sinkpad);

   369 

   370   nuv->priv->new_audio_segment = TRUE;

   371   nuv->priv->new_video_segment = TRUE;

   372 

   373   /* creating adapter */

   374   nuv->priv->mode = NUV_PUSH_MODE;

   375   nuv->priv->adapter = gst_adapter_new ();

   376 

   377   gst_nuv_demux_reset (nuv);

   378 }

   379 

   380 static void

   381 gst_nuv_demux_dispose (GObject * object)

   382 {

   383   GstNuvDemux *nuv = GST_NUV_DEMUX (object);

   384 

   385   if (nuv->priv->mpeg_buffer != NULL) {

   386     gst_buffer_unref (nuv->priv->mpeg_buffer);

   387   }

   388 

   389   gst_nuv_demux_reset (GST_NUV_DEMUX (object));

   390   gst_nuv_demux_destoy_src_pad (GST_NUV_DEMUX (object));

   391 

   392   if (nuv->priv->adapter != NULL) {

   393     gst_object_unref (nuv->priv->adapter);

   394   }

   395 }

   396 

   397 static void

   398 gst_nuv_demux_finalize (GObject * object)

   399 {

   400   G_OBJECT_CLASS (parent_class)->finalize (object);

   401 }

   402 

   403 

   404 /* HeaderLoad:

   405  */

   406 static GstFlowReturn

   407 gst_nuv_demux_header_load (GstNuvDemux * nuv, nuv_header *h)

   408 {

   409   GstBuffer *buffer = NULL;

   410   GstFlowReturn res = gst_nuv_demux_read_bytes (nuv, 72, TRUE, &buffer);

   411 

   412   if ((res != GST_FLOW_OK) || (buffer == NULL)) {

   413       goto done;

   414   }

   415 

   416   memcpy (h->id, buffer->data, 12);

   417   memcpy (h->version, buffer->data + 12, 5);

   418   h->i_width = GST_READ_UINT32_LE (&buffer->data[20]);

   419   h->i_height = GST_READ_UINT32_LE (&buffer->data[24]);

   420   h->i_width_desired = GST_READ_UINT32_LE (&buffer->data[28]);

   421   h->i_height_desired = GST_READ_UINT32_LE (&buffer->data[32]);

   422   h->i_mode = GPOINTER_TO_INT (buffer->data[36]);

   423   h->d_aspect = READ_DOUBLE_FROM_LE (&buffer->data[40]);

   424   h->d_fps = READ_DOUBLE_FROM_LE (&buffer->data[48]);

   425   /* get the num and denom values from fps */

   426   double2fraction (h->d_fps, &h->i_fpsn, &h->i_fpsd);

   427   h->i_video_blocks = GST_READ_UINT32_LE (&buffer->data[56]);

   428   h->i_audio_blocks = GST_READ_UINT32_LE (&buffer->data[60]);

   429   h->i_text_blocks = GST_READ_UINT32_LE (&buffer->data[64]);

   430   h->i_keyframe_distance = GST_READ_UINT32_LE (&buffer->data[68]);

   431 

   432   GST_DEBUG_OBJECT (nuv,

   433       "nuv: h=%s v=%s %dx%d a=%f fps=%f v=%d a=%d t=%d kfd=%d", h->id,

   434       h->version, h->i_width, h->i_height, h->d_aspect, h->d_fps,

   435       h->i_video_blocks, h->i_audio_blocks, h->i_text_blocks,

   436       h->i_keyframe_distance);

   437 

   438 done:

   439   if (buffer != NULL) {

   440      gst_buffer_unref (buffer);

   441      buffer = NULL;

   442   }

   443   return res;

   444 }

   445 

   446 static GstFlowReturn

   447 gst_nuv_demux_stream_header_data (GstNuvDemux * nuv)

   448 {

   449   GstFlowReturn res;

   450 

   451   res = gst_nuv_demux_header_load (nuv, &nuv->priv->h);

   452   if (res == GST_FLOW_OK)

   453     nuv->priv->state = GST_NUV_DEMUX_EXTRA_DATA;

   454   return res;

   455 }

   456 

   457 /*

   458  * Read NUV file tag

   459  */

   460 static GstFlowReturn

   461 gst_nuv_demux_stream_file_header (GstNuvDemux * nuv)

   462 {

   463   GstFlowReturn res = GST_FLOW_OK;

   464   GstBuffer *file_header = NULL;

   465 

   466   res = gst_nuv_demux_read_bytes (nuv, 12, FALSE, &file_header);

   467   if (res == GST_FLOW_OK) {

   468     if (strncmp ((gchar *) file_header->data, "MythTVVideo", 11) ||

   469         strncmp ((gchar *) file_header->data, "NuppelVideo", 11)) {

   470       nuv->priv->state = GST_NUV_DEMUX_HEADER_DATA;

   471     } else {

   472       GST_DEBUG_OBJECT (nuv, "error parsing file header");

   473       nuv->priv->state = GST_NUV_DEMUX_INVALID_DATA;

   474       res = GST_FLOW_ERROR;

   475     }

   476   }

   477 

   478   if (file_header != NULL) {

   479     gst_buffer_unref (file_header);

   480     file_header = NULL;

   481   }

   482   return res;

   483 }

   484 

   485 /* FrameHeaderLoad:

   486  */

   487 static GstFlowReturn

   488 gst_nuv_demux_frame_header_load (GstNuvDemux * nuv, nuv_frame_header *h)

   489 {

   490   unsigned char *data;

   491   GstBuffer *buf = NULL;

   492 

   493   GstFlowReturn res = gst_nuv_demux_read_bytes (nuv, 12, TRUE, &buf);

   494 

   495   if ((res != GST_FLOW_OK) || (buf == NULL)) {

   496       goto done;

   497   }

   498 

   499   data = buf->data;

   500 

   501   h->i_type = GPOINTER_TO_INT (data[0]);

   502   h->i_compression = GPOINTER_TO_INT (data[1]);

   503   h->i_keyframe = GPOINTER_TO_INT (data[2]);

   504   h->i_filters = GPOINTER_TO_INT (data[3]);

   505   h->i_timecode = GST_READ_UINT32_LE (&data[4]);

   506   h->i_length = GST_READ_UINT32_LE (&data[8]);

   507 

   508   GST_DEBUG_OBJECT (nuv, "frame hdr: t=%c c=%c k=%d f=0x%x timecode=%d l=%d",

   509       h->i_type,

   510       h->i_compression ? h->i_compression : ' ',

   511       h->i_keyframe ? h->i_keyframe : ' ',

   512       h->i_filters, h->i_timecode, h->i_length);

   513 

   514 done:  

   515   if (buf != NULL) {

   516       gst_buffer_unref (buf);

   517       buf = NULL;

   518   }

   519   return res;

   520 }

   521 

   522 static GstFlowReturn

   523 gst_nuv_demux_extended_header_load (GstNuvDemux * nuv,

   524     nuv_extended_header * h)

   525 {

   526   unsigned char *data;

   527   GstBuffer *buff = NULL;

   528 

   529   GstFlowReturn res = gst_nuv_demux_read_bytes (nuv, 512, TRUE, &buff);

   530 

   531   if ((res != GST_FLOW_OK) || (buff == NULL)) {

   532       goto done;

   533   }

   534 

   535   data = buff->data;

   536   h->i_version = GST_READ_UINT32_LE (&data[0]);

   537   h->i_video_fcc = GST_MAKE_FOURCC (data[4], data[5], data[6], data[7]);

   538   h->i_audio_fcc = GST_MAKE_FOURCC (data[8], data[9], data[10], data[11]);

   539   h->i_audio_sample_rate = GST_READ_UINT32_LE (&data[12]);

   540   h->i_audio_bits_per_sample = GST_READ_UINT32_LE (&data[16]);

   541   h->i_audio_channels = GST_READ_UINT32_LE (&data[20]);

   542   h->i_audio_compression_ratio = GST_READ_UINT32_LE (&data[24]);

   543   h->i_audio_quality = GST_READ_UINT32_LE (&data[28]);

   544   h->i_rtjpeg_quality = GST_READ_UINT32_LE (&data[32]);

   545   h->i_rtjpeg_luma_filter = GST_READ_UINT32_LE (&data[36]);

   546   h->i_rtjpeg_chroma_filter = GST_READ_UINT32_LE (&data[40]);

   547   h->i_lavc_bitrate = GST_READ_UINT32_LE (&data[44]);

   548   h->i_lavc_qmin = GST_READ_UINT32_LE (&data[48]);

   549   h->i_lavc_qmin = GST_READ_UINT32_LE (&data[52]);

   550   h->i_lavc_maxqdiff = GST_READ_UINT32_LE (&data[56]);

   551   h->i_seekable_offset = GST_READ_UINT64_LE (&data[60]);

   552   h->i_keyframe_adjust_offset = GST_READ_UINT64_LE (&data[68]);

   553 

   554   GST_DEBUG_OBJECT (nuv,

   555       "ex hdr: v=%d vffc=%4.4s afcc=%4.4s %dHz %dbits ach=%d acr=%d aq=%d"

   556       "rtjpeg q=%d lf=%d lc=%d lavc br=%d qmin=%d qmax=%d maxqdiff=%d seekableoff=%lld keyfao=%lld",

   557       h->i_version, (gchar *) & h->i_video_fcc, (gchar *) & h->i_audio_fcc,

   558       h->i_audio_sample_rate, h->i_audio_bits_per_sample, h->i_audio_channels,

   559       h->i_audio_compression_ratio, h->i_audio_quality, h->i_rtjpeg_quality,

   560       h->i_rtjpeg_luma_filter, h->i_rtjpeg_chroma_filter, h->i_lavc_bitrate,

   561       h->i_lavc_qmin, h->i_lavc_qmax, h->i_lavc_maxqdiff, h->i_seekable_offset,

   562       h->i_keyframe_adjust_offset);

   563 

   564 done:

   565   if (buff != NULL) {

   566     gst_buffer_unref (buff);

   567     buff = NULL;

   568   }

   569   return res;

   570 }

   571 

   572 

   573 /* Query Functions */

   574 static const GstQueryType *

   575 gst_nuv_demux_get_src_query_types (GstPad * pad)

   576 {

   577   static const GstQueryType src_types[] = {

   578     GST_QUERY_POSITION,

   579     GST_QUERY_DURATION,

   580     0

   581   };

   582 

   583   return src_types;

   584 }

   585 

   586 static gboolean

   587 gst_nuv_demux_handle_src_query (GstPad * pad, GstQuery * query)

   588 {

   589   gboolean res = FALSE;

   590   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

   591 

   592   switch (GST_QUERY_TYPE (query)) {

   593     case GST_QUERY_POSITION:

   594       if (GST_CLOCK_TIME_IS_VALID (nuv->priv->last_frame_time)) {

   595 

   596         gst_query_set_position (query, GST_FORMAT_TIME, nuv->priv->last_frame_time);

   597         res = TRUE;

   598       }

   599       break;

   600     case GST_QUERY_DURATION:

   601       {

   602         gint64 duration = 0;

   603         duration = gst_nuv_demux_get_time_duration (nuv);

   604         if (duration == GST_CLOCK_TIME_NONE) {

   605             duration = nuv->priv->duration_average;

   606         }

   607         if (duration != GST_CLOCK_TIME_NONE) {

   608             gst_query_set_duration (query, GST_FORMAT_TIME, duration);

   609             res = TRUE;

   610         }

   611       }

   612       break;

   613     default:

   614       res = FALSE;

   615       break;

   616   }

   617 

   618   gst_object_unref (nuv);

   619 

   620   return res;

   621 }

   622 

   623 static GstPad*

   624 gst_nuv_demux_create_pad (GstNuvDemux *nuv, GstCaps *caps, GstStaticPadTemplate *template, const gchar* name)

   625 {

   626     GstPad *pad = NULL;

   627     pad = gst_pad_new_from_static_template (template, name);

   628     gst_pad_set_caps (pad, caps);

   629     gst_pad_set_active (pad, TRUE);

   630     gst_pad_use_fixed_caps (pad);

   631     gst_element_add_pad (GST_ELEMENT (nuv), pad);

   632 

   633     return pad;

   634 }

   635 

   636 static void

   637 gst_nuv_demux_create_pads (GstNuvDemux * nuv)

   638 {

   639   if (nuv->priv->h.i_video_blocks != 0) {

   640     GstCaps *video_caps = NULL;

   641 

   642     video_caps = gst_caps_new_simple ("video/x-divx",

   643         "divxversion", G_TYPE_INT, 4,

   644         "width", G_TYPE_INT, nuv->priv->h.i_width,

   645         "height", G_TYPE_INT, nuv->priv->h.i_height,

   646         "framerate", GST_TYPE_FRACTION, nuv->priv->h.i_fpsn, nuv->priv->h.i_fpsd,

   647         "format", GST_TYPE_FOURCC, nuv->priv->eh.i_video_fcc,

   648         "pixel-aspect-ratio", GST_TYPE_FRACTION,

   649         (gint) (nuv->priv->h.d_aspect * 1000.0f), 1000, NULL);

   650 

   651     nuv->priv->src_video_pad = gst_nuv_demux_create_pad (nuv, video_caps, &video_src_template, "video_src");

   652     gst_caps_unref (video_caps);

   653   }

   654 

   655   if (nuv->priv->h.i_audio_blocks != 0) {

   656     GstCaps *audio_caps = NULL;

   657 

   658     audio_caps = gst_caps_new_simple ("audio/mpeg",

   659         "rate", G_TYPE_INT, nuv->priv->eh.i_audio_sample_rate,

   660         "format", GST_TYPE_FOURCC, nuv->priv->eh.i_audio_fcc,

   661         "channels", G_TYPE_INT, nuv->priv->eh.i_audio_channels,

   662         "layer", G_TYPE_INT, 3, // fixme: magic number

   663         "mpegversion", G_TYPE_INT, nuv->priv->eh.i_version, NULL);

   664     

   665     char *tmp = gst_caps_to_string (audio_caps);

   666 

   667     nuv->priv->src_audio_pad = gst_nuv_demux_create_pad (nuv, audio_caps, &audio_src_template, "audio_src");

   668     gst_caps_unref (audio_caps);

   669   }

   670 

   671   gst_element_no_more_pads (GST_ELEMENT (nuv));

   672 }

   673 

   674 static GstFlowReturn

   675 gst_nuv_demux_read_head_frame (GstNuvDemux * nuv)

   676 {

   677   GstFlowReturn ret = GST_FLOW_OK;

   678 

   679   ret = gst_nuv_demux_frame_header_load (nuv, &nuv->priv->fh);

   680   if (ret != GST_FLOW_OK)

   681     return ret;

   682 

   683   nuv->priv->state = GST_NUV_DEMUX_MOVI;

   684   return ret;

   685 }

   686 

   687 static gboolean

   688 gst_nuv_combine_flow (GstNuvDemux *nuv)

   689 {

   690     GstFlowReturn ret_video = nuv->priv->last_video_return;

   691     GstFlowReturn ret_audio = nuv->priv->last_audio_return;

   692 

   693     if ((ret_video != GST_FLOW_OK) &&

   694         (ret_audio != GST_FLOW_OK))

   695         return FALSE;

   696 

   697     if (GST_FLOW_IS_FATAL (ret_video))

   698         return FALSE;

   699 

   700     if (GST_FLOW_IS_FATAL (ret_audio))

   701         return FALSE;

   702 

   703     return TRUE;

   704 }

   705 

   706 static GstFlowReturn

   707 gst_nuv_demux_stream_data (GstNuvDemux * nuv)

   708 {

   709   GstFlowReturn ret = GST_FLOW_OK;

   710   GstPad *pad = NULL;

   711   guint64 timestamp;

   712   GstBuffer *buf = NULL;

   713   nuv_frame_header h;

   714 

   715   h = nuv->priv->fh;

   716 

   717   if (h.i_type == 'R')

   718     goto done;

   719 

   720   if (h.i_length > 0) {

   721 	  ret = gst_nuv_demux_read_bytes (nuv, h.i_length, TRUE, &buf);

   722 	  if ((ret != GST_FLOW_OK) || (buf == NULL)) {

   723           goto done;

   724       }

   725 

   726       if ((h.i_timecode < 0)) {

   727 	goto done;

   728       }

   729 

   730       timestamp = h.i_timecode * GST_MSECOND;

   731       GST_BUFFER_TIMESTAMP (buf) = timestamp;

   732   }

   733   else {

   734     goto done;

   735   }

   736 

   737 

   738   switch (h.i_type) {

   739     case 'V':

   740     {

   741       pad = nuv->priv->src_video_pad;

   742 

   743       if (nuv->priv->new_video_segment) {

   744 

   745         /* send new segment event*/

   746         gst_pad_push_event (nuv->priv->src_video_pad,

   747           gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0,

   748                                      GST_CLOCK_TIME_NONE, 0));

   749 

   750         if (nuv->priv->time_start == GST_CLOCK_TIME_NONE) {

   751             nuv->priv->time_start = timestamp;

   752         }

   753         nuv->priv->new_video_segment = FALSE;

   754       }

   755 

   756       break;

   757     }

   758     case 'A':

   759     {

   760       pad = nuv->priv->src_audio_pad;

   761 

   762       if (nuv->priv->new_audio_segment) {

   763         /* send new segment event*/

   764         gst_pad_push_event (nuv->priv->src_audio_pad,

   765           gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0,

   766                                      GST_CLOCK_TIME_NONE, 0));

   767 

   768         if (nuv->priv->time_start == GST_CLOCK_TIME_NONE) {

   769             nuv->priv->time_start = timestamp;

   770         }

   771         nuv->priv->new_audio_segment = FALSE;

   772       }

   773 

   774       break;

   775     }

   776     case 'S':

   777    {

   778       switch (h.i_compression) {

   779         case 'V':

   780           GST_DEBUG_OBJECT (nuv, "sending new video segment: %d", h.i_timecode);

   781           gst_pad_push_event (nuv->priv->src_video_pad,

   782               gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, h.i_timecode * GST_MSECOND,

   783               		GST_CLOCK_TIME_NONE, 0));

   784           break;

   785         case 'A':

   786           GST_DEBUG_OBJECT (nuv, "sending new audio segment: %d", h.i_timecode);

   787           gst_pad_push_event (nuv->priv->src_audio_pad,

   788               gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0,

   789               		GST_CLOCK_TIME_NONE, 0));

   790           break;

   791         default:

   792           break;

   793       }

   794       goto done;

   795     }

   796     default:

   797       break;

   798   }

   799 

   800   if ((buf != NULL) && (pad != NULL)) {

   801       /* update average time */

   802       nuv->priv->streamer_offset += h.i_length;

   803       gst_segment_set_last_stop (&nuv->priv->segment, GST_FORMAT_TIME, timestamp);

   804       gst_nuv_demux_update_duration (nuv, timestamp);

   805 

   806       /* pushing the buffer */

   807       gst_buffer_set_caps (buf, GST_PAD_CAPS (pad));

   808       ret = gst_pad_push (pad, buf);

   809       buf = NULL;

   810 

   811       if (ret != GST_FLOW_OK) {

   812         GST_WARNING_OBJECT (nuv, "error: %d pushing on srcpad %s", ret, gst_pad_get_name (pad));

   813 

   814         if (pad == nuv->priv->src_video_pad) {

   815             nuv->priv->last_video_return = ret;

   816         }

   817         else if (pad == nuv->priv->src_audio_pad) {

   818             nuv->priv->last_audio_return = ret;

   819         }

   820 

   821         /* verify anothers flow if is necessary stop task */

   822         if (gst_nuv_combine_flow (nuv) != FALSE) {

   823             ret = GST_FLOW_OK;

   824         }

   825 

   826         //GST_WARNING_OBJECT (nuv, "error: %d pushing on srcpad %s", ret, gst_pad_get_name (pad));

   827       }

   828   } 

   829 

   830 done:

   831   if (buf != NULL) {

   832       gst_buffer_unref (buf);

   833       buf = NULL;

   834   }

   835   if (ret == GST_FLOW_OK) {

   836      nuv->priv->state = GST_NUV_DEMUX_FRAME_HEADER;

   837      memset (&nuv->priv->fh, 0, sizeof (nuv->priv->fh));

   838   }

   839   return ret;

   840 }

   841 

   842 static GstFlowReturn

   843 gst_nuv_demux_stream_mpeg_data (GstNuvDemux * nuv)

   844 {

   845   GstFlowReturn ret = GST_FLOW_OK;

   846 

   847   /* ffmpeg extra data */

   848   ret = gst_nuv_demux_read_bytes (nuv, nuv->priv->mpeg_data_size, TRUE,

   849       &nuv->priv->mpeg_buffer);

   850   if ((ret != GST_FLOW_OK) || (nuv->priv->mpeg_buffer == NULL)) {

   851     return ret;

   852   }

   853 

   854   GST_BUFFER_SIZE (nuv->priv->mpeg_buffer) = nuv->priv->mpeg_data_size;

   855   nuv->priv->state = GST_NUV_DEMUX_EXTEND_HEADER;

   856   return ret;

   857 }

   858 

   859 static GstFlowReturn

   860 gst_nuv_demux_stream_extra_data (GstNuvDemux * nuv)

   861 {

   862   GstFlowReturn ret = GST_FLOW_OK;

   863 

   864   /* Load 'D' */

   865   nuv_frame_header h;

   866 

   867   ret = gst_nuv_demux_frame_header_load (nuv, &h);

   868   if (ret != GST_FLOW_OK)

   869     return ret;

   870 

   871   if (h.i_type != 'D') {

   872     GST_WARNING_OBJECT (nuv, "Unsuported rtjpeg");

   873     return GST_FLOW_NOT_SUPPORTED;

   874   }

   875 

   876   if (h.i_length > 0) {

   877     if (h.i_compression == 'F') {

   878       nuv->priv->state = GST_NUV_DEMUX_MPEG_DATA;

   879     } else {

   880       GST_WARNING_OBJECT (nuv, "only file with extended chunk are supported");

   881       return GST_FLOW_NOT_SUPPORTED;

   882     }

   883   } else {

   884     nuv->priv->state = GST_NUV_DEMUX_EXTEND_HEADER;

   885   }

   886 

   887   return ret;

   888 }

   889 

   890 static GstFlowReturn

   891 gst_nuv_demux_stream_extend_header_data (GstNuvDemux * nuv)

   892 {

   893   GstFlowReturn ret = GST_FLOW_OK;

   894 

   895   ret = gst_nuv_demux_extended_header_load (nuv, &nuv->priv->eh);

   896   if (ret != GST_FLOW_OK)

   897     return ret;

   898 

   899   gst_nuv_demux_create_pads (nuv);

   900   nuv->priv->state = GST_NUV_DEMUX_FRAME_HEADER;

   901   return ret;

   902 }

   903 

   904 static GstFlowReturn

   905 gst_nuv_demux_stream_extend_header (GstNuvDemux * nuv)

   906 {

   907   GstBuffer *buf = NULL;

   908   GstFlowReturn res = GST_FLOW_OK;

   909 

   910   res = gst_nuv_demux_read_bytes (nuv, 1, FALSE, &buf);

   911   if ((res != GST_FLOW_OK) || (buf == NULL)) {

   912     if (buf != NULL) {

   913       gst_buffer_unref (buf);

   914     }

   915     return res;

   916   }

   917 

   918   if (buf->data[0] == 'X') {

   919     gst_buffer_unref (buf);

   920     buf = NULL;

   921     nuv_frame_header h;

   922 

   923     res = gst_nuv_demux_frame_header_load (nuv, &h);

   924     if (res != GST_FLOW_OK)

   925       return res;

   926 

   927     if (h.i_length != 512) {

   928       return GST_FLOW_ERROR;

   929     }

   930     nuv->priv->state = GST_NUV_DEMUX_EXTEND_HEADER_DATA;

   931   } else {

   932     nuv->priv->state = GST_NUV_DEMUX_INVALID_DATA;

   933     g_object_unref (buf);

   934     GST_ELEMENT_WARNING (nuv, STREAM, FAILED,

   935         (_("incomplete NUV support")), ("incomplete NUV support"));

   936     return GST_FLOW_ERROR;

   937   }

   938   return res;

   939 }

   940 

   941 static GstFlowReturn

   942 gst_nuv_demux_play (GstPad * pad)

   943 {

   944   GstFlowReturn res = GST_FLOW_OK;

   945   GstNuvDemux *nuv = GST_NUV_DEMUX (GST_PAD_PARENT (pad));

   946 

   947   switch (nuv->priv->state) {

   948     case GST_NUV_DEMUX_START:

   949       res = gst_nuv_demux_stream_file_header (nuv);

   950       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

   951         goto pause;

   952       }

   953       break;

   954 

   955     case GST_NUV_DEMUX_HEADER_DATA:

   956       res = gst_nuv_demux_stream_header_data (nuv);

   957       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

   958         goto pause;

   959       }

   960       break;

   961 

   962     case GST_NUV_DEMUX_EXTRA_DATA:

   963       res = gst_nuv_demux_stream_extra_data (nuv);

   964       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

   965         goto pause;

   966       }

   967       break;

   968 

   969     case GST_NUV_DEMUX_MPEG_DATA:

   970       res = gst_nuv_demux_stream_mpeg_data (nuv);

   971       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

   972         goto pause;

   973       }

   974       break;

   975 

   976     case GST_NUV_DEMUX_EXTEND_HEADER:

   977       res = gst_nuv_demux_stream_extend_header (nuv);

   978       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

   979         goto pause;

   980       }

   981       break;

   982 

   983     case GST_NUV_DEMUX_EXTEND_HEADER_DATA:

   984       res = gst_nuv_demux_stream_extend_header_data (nuv);

   985       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

   986         goto pause;

   987       }

   988       break;

   989 

   990     case GST_NUV_DEMUX_FRAME_HEADER:

   991       res = gst_nuv_demux_read_head_frame (nuv);

   992       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

   993         goto pause;

   994       }

   995       break;

   996 

   997     case GST_NUV_DEMUX_MOVI:

   998       res = gst_nuv_demux_stream_data (nuv);

   999       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

  1000         goto pause;

  1001       }

  1002       break;

  1003 

  1004     case GST_NUV_DEMUX_INVALID_DATA:

  1005       goto pause;

  1006       break;

  1007     default:

  1008       g_assert_not_reached ();

  1009   }

  1010 

  1011   return GST_FLOW_OK;

  1012 

  1013 pause:

  1014   GST_LOG_OBJECT (nuv, "pausing task, reason %s", gst_flow_get_name (res));

  1015   gst_pad_pause_task (nuv->priv->sinkpad);

  1016   if (GST_FLOW_IS_FATAL (res)) {

  1017     GST_ELEMENT_ERROR (nuv, STREAM, FAILED,

  1018         (_("Internal data stream error.")),

  1019         ("streaming stopped, reason %s", gst_flow_get_name (res)));

  1020 

  1021     gst_nuv_demux_send_eos (nuv);

  1022   }

  1023   return res;

  1024 }

  1025 

  1026 static void

  1027 gst_nuv_demux_send_eos (GstNuvDemux * nuv)

  1028 {

  1029   gst_element_post_message (GST_ELEMENT (nuv),

  1030       gst_message_new_segment_done (GST_OBJECT (nuv), GST_FORMAT_TIME, -1));

  1031 

  1032   if (nuv->priv->src_video_pad)

  1033     gst_pad_push_event (nuv->priv->src_video_pad, gst_event_new_eos ());

  1034   if (nuv->priv->src_audio_pad)

  1035     gst_pad_push_event (nuv->priv->src_audio_pad, gst_event_new_eos ());

  1036 }

  1037 

  1038 static GstFlowReturn

  1039 gst_nuv_demux_read_bytes (GstNuvDemux * nuv, guint64 size, gboolean move,

  1040     GstBuffer ** buffer)

  1041 {

  1042   GstFlowReturn ret = GST_FLOW_OK;

  1043 

  1044   if (size == 0) {

  1045     return ret;

  1046   }

  1047 

  1048   if (nuv->priv->mode == NUV_PULL_MODE) {

  1049     ret = gst_pad_pull_range (nuv->priv->sinkpad, nuv->priv->offset, size, buffer);

  1050     if (ret == GST_FLOW_OK) {

  1051         if (move) {

  1052 		    nuv->priv->offset += size;

  1053 		}

  1054       /* got eos */

  1055     } else if (ret == GST_FLOW_UNEXPECTED) {

  1056       if (buffer != NULL)

  1057           gst_buffer_unref (buffer);

  1058 

  1059       gst_nuv_demux_send_eos (nuv);

  1060       return GST_FLOW_WRONG_STATE;

  1061     }

  1062   } else {

  1063     if (gst_adapter_available (nuv->priv->adapter) < size) {

  1064       nuv->priv->more_data = TRUE;

  1065       return GST_FLOW_ERROR_NO_DATA;

  1066     }

  1067     if (move) {

  1068       *buffer = gst_adapter_take_buffer (nuv->priv->adapter, size);

  1069     } else {

  1070       guint8 *data = NULL;

  1071       data = (guint8 *) gst_adapter_peek (nuv->priv->adapter, size);

  1072       *buffer = gst_buffer_new ();

  1073       gst_buffer_set_data (*buffer, data, size);

  1074     }

  1075   }

  1076   return ret;

  1077 }

  1078 

  1079 static gboolean

  1080 gst_nuv_demux_sink_activate (GstPad * sinkpad)

  1081 {

  1082   gboolean res = TRUE;

  1083   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (sinkpad));

  1084 

  1085   if (gst_pad_check_pull_range (sinkpad)) {

  1086     if (nuv->priv->adapter) {

  1087       gst_adapter_clear (nuv->priv->adapter);

  1088       g_object_unref (nuv->priv->adapter);

  1089       nuv->priv->adapter = NULL;

  1090     }

  1091     res = gst_pad_activate_pull (sinkpad, TRUE);

  1092   } else {

  1093     if (nuv->priv->adapter) {

  1094       gst_adapter_clear (nuv->priv->adapter);

  1095     } else {

  1096       nuv->priv->adapter = gst_adapter_new ();

  1097     }

  1098     res = gst_pad_activate_push (sinkpad, TRUE);

  1099   }

  1100   

  1101   g_object_unref (nuv);

  1102   return res;

  1103 }

  1104 

  1105 static gboolean

  1106 gst_nuv_demux_sink_activate_pull (GstPad * sinkpad, gboolean active)

  1107 {

  1108   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (sinkpad));

  1109 

  1110   if (active) {

  1111     GST_DEBUG_OBJECT (nuv, "activating pull function");

  1112     nuv->priv->mode = NUV_PULL_MODE;

  1113     if (nuv->priv->adapter) {

  1114       gst_adapter_clear (nuv->priv->adapter);

  1115       g_object_unref (nuv->priv->adapter);

  1116       nuv->priv->adapter = NULL;

  1117     }

  1118     gst_pad_start_task (sinkpad, (GstTaskFunction) gst_nuv_demux_loop, sinkpad);

  1119   } else {

  1120     GST_DEBUG_OBJECT (nuv, "deactivating pull function");

  1121     gst_pad_stop_task (sinkpad);

  1122   }

  1123   gst_object_unref (nuv);

  1124 

  1125   return TRUE;

  1126 }

  1127 

  1128 static gboolean

  1129 gst_nuv_demux_sink_activate_push (GstPad * pad, gboolean active)

  1130 {

  1131   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

  1132 

  1133 

  1134   if (active) {

  1135     GST_DEBUG_OBJECT (nuv, "activating push/chain function");

  1136   } else {

  1137     GST_DEBUG_OBJECT (nuv, "deactivating push/chain function");

  1138   }

  1139 

  1140   gst_object_unref (nuv);

  1141 

  1142   return TRUE;

  1143 }

  1144 

  1145 

  1146 static gboolean

  1147 gst_nuv_demux_sink_event (GstPad *pad, GstEvent *event)

  1148 {

  1149   gboolean res;

  1150   GstNuvDemux *nuv;

  1151 

  1152   nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

  1153 

  1154   switch (GST_EVENT_TYPE (event)) {

  1155     case GST_EVENT_SEEK:

  1156     {

  1157       gdouble rate;

  1158       GstFormat format;

  1159       GstSeekFlags flags;

  1160       GstSeekType cur_type;

  1161       gint64 cur;

  1162       GstSeekType stop_type;

  1163       gint64 stop;

  1164 

  1165       gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &cur, &stop_type, &stop);

  1166       GST_DEBUG_OBJECT (nuv, "got seek, start %" G_GINT64_FORMAT ", stop %" G_GINT64_FORMAT, cur, stop);

  1167       break;

  1168     }

  1169     case GST_EVENT_NEWSEGMENT:

  1170     {

  1171       gint64 start, stop, time;

  1172       gdouble rate, arate;

  1173       GstFormat format;

  1174       gboolean update;

  1175 

  1176       GST_DEBUG_OBJECT (nuv, "got a new segment event");

  1177       gst_event_parse_new_segment (event, &update, &rate, &format, &start, &stop, &time);

  1178 

  1179       GST_DEBUG_OBJECT (nuv, "got newsegment, start %" G_GINT64_FORMAT ", stop %" G_GINT64_FORMAT, start, stop);

  1180       nuv->priv->duration_bytes = stop - start;

  1181       gst_event_unref (event);

  1182       res = TRUE;

  1183       break;

  1184     }

  1185     case GST_EVENT_QOS:

  1186     {

  1187 /*

  1188       gdouble proportion;

  1189       GstClockTimeDiff diff;

  1190       GstClockTime timestamp;

  1191 

  1192       gst_event_parse_qos (event, &proportion, &diff, &timestamp);

  1193       if (diff > 0)

  1194         nuv->time_qos = timecode + diff;

  1195       else

  1196         nuv->time_qos = -1;

  1197 */

  1198       break;

  1199     }

  1200 

  1201     case GST_EVENT_EOS:

  1202     default:

  1203       res = gst_pad_event_default (pad, event);

  1204       break;

  1205   }

  1206 

  1207   gst_object_unref (nuv);

  1208   return res;

  1209 }

  1210 

  1211 static GstFlowReturn

  1212 gst_nuv_demux_chain (GstPad * pad, GstBuffer * buf)

  1213 {

  1214   GstFlowReturn ret = GST_FLOW_OK;

  1215 

  1216   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

  1217 

  1218   gst_adapter_push (nuv->priv->adapter, buf);  

  1219   

  1220   while ((ret == GST_FLOW_OK) && (nuv->priv->more_data == FALSE)) {

  1221       ret = gst_nuv_demux_play (pad);

  1222   }

  1223 

  1224   nuv->priv->more_data = FALSE;

  1225   gst_object_unref (nuv);

  1226   

  1227   return ret;

  1228 }

  1229 

  1230 static void

  1231 gst_nuv_demux_loop (GstPad * pad)

  1232 {

  1233   gst_nuv_demux_play (pad);

  1234 }

  1235 

  1236 static void

  1237 gst_nuv_demux_reset (GstNuvDemux * nuv)

  1238 {

  1239   nuv->priv->more_data = FALSE;

  1240   nuv->priv->state = GST_NUV_DEMUX_START;

  1241   nuv->priv->mode = 0;

  1242   nuv->priv->offset = 0;

  1243   nuv->priv->streamer_offset = 0;

  1244   nuv->priv->time_start = 0;

  1245   nuv->priv->time_qos = GST_CLOCK_TIME_NONE;

  1246   nuv->priv->duration_bytes = GST_CLOCK_TIME_NONE;

  1247   nuv->priv->duration_time = GST_CLOCK_TIME_NONE;

  1248   nuv->priv->duration_average = GST_CLOCK_TIME_NONE;

  1249   gst_segment_init (&nuv->priv->segment, GST_FORMAT_TIME);

  1250 

  1251   if (nuv->priv->adapter != NULL) {

  1252     gst_adapter_clear (nuv->priv->adapter);

  1253   }

  1254 

  1255   if (nuv->priv->mpeg_buffer != NULL) {

  1256     gst_buffer_unref (nuv->priv->mpeg_buffer);

  1257     nuv->priv->mpeg_buffer = NULL;

  1258   }

  1259 }

  1260 

  1261 static void

  1262 gst_nuv_demux_destoy_src_pad (GstNuvDemux * nuv)

  1263 {

  1264   if (nuv->priv->src_video_pad) {

  1265     gst_element_remove_pad (GST_ELEMENT (nuv), nuv->priv->src_video_pad);

  1266     nuv->priv->src_video_pad = NULL;

  1267   }

  1268 

  1269   if (nuv->priv->src_audio_pad) {

  1270     gst_element_remove_pad (GST_ELEMENT (nuv), nuv->priv->src_audio_pad);

  1271     nuv->priv->src_audio_pad = NULL;

  1272   }

  1273 }

  1274 

  1275 static GstStateChangeReturn

  1276 gst_nuv_demux_change_state (GstElement * element, GstStateChange transition)

  1277 {

  1278   GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;

  1279 

  1280   switch (transition) {

  1281     case GST_STATE_CHANGE_NULL_TO_READY:

  1282       gst_nuv_demux_reset (GST_NUV_DEMUX (element));

  1283       gst_nuv_demux_destoy_src_pad (GST_NUV_DEMUX (element));

  1284       break;

  1285     default:

  1286       break;

  1287   }

  1288 

  1289   ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);

  1290   if (ret == GST_STATE_CHANGE_FAILURE) {

  1291     goto done;

  1292   }

  1293 

  1294   switch (transition) {

  1295     case GST_STATE_CHANGE_READY_TO_NULL:

  1296       gst_nuv_demux_reset (GST_NUV_DEMUX (element));

  1297       gst_nuv_demux_destoy_src_pad (GST_NUV_DEMUX (element));

  1298       break;

  1299     default:

  1300       break;

  1301   }

  1302 

  1303 done:

  1304   return ret;

  1305 }

  1306 

  1307 static void

  1308 gst_nuv_demux_update_duration (GstNuvDemux *nuv, guint64 current_timestamp)

  1309 {

  1310     guint64 interval = 0;

  1311 

  1312     if (gst_nuv_demux_get_time_duration (nuv) != GST_CLOCK_TIME_NONE)

  1313         return;

  1314 

  1315     interval  = current_timestamp - nuv->priv->last_update;

  1316 

  1317     if (interval > (10 * GST_SECOND)) {

  1318         GstMessage* msg = NULL;

  1319         gint64 average = 0;

  1320         gint64 duration_bytes = gst_nuv_demux_get_bytes_duration (nuv);

  1321 

  1322         if (duration_bytes == GST_CLOCK_TIME_NONE) {

  1323             return;

  1324         }

  1325 

  1326         interval = gst_util_uint64_scale (1, current_timestamp - nuv->priv->time_start, GST_SECOND);

  1327         if (interval > 0) {

  1328             average = gst_util_uint64_scale (1 , nuv->priv->streamer_offset, interval);

  1329         }

  1330         if (average > 0) {

  1331             nuv->priv->duration_average = gst_util_uint64_scale (GST_SECOND, duration_bytes, average);

  1332         }

  1333         

  1334         nuv->priv->last_update = current_timestamp;

  1335         msg = gst_message_new_duration (GST_OBJECT (nuv), GST_FORMAT_TIME, nuv->priv->duration_average);

  1336         gst_element_post_message (GST_ELEMENT (nuv), msg);

  1337         GST_DEBUG_OBJECT (nuv, "New Duration Average %"G_GUINT64_FORMAT, nuv->priv->duration_average);

  1338         g_debug ("New Duration Average %"G_GUINT64_FORMAT, nuv->priv->duration_average);

  1339     }

  1340 }

  1341 

  1342 static gint64

  1343 gst_nuv_demux_get_bytes_duration (GstNuvDemux *nuv)

  1344 {

  1345     if (nuv->priv->duration_bytes == GST_CLOCK_TIME_NONE) {

  1346         GstPad *peer = gst_pad_get_peer (nuv->priv->sinkpad);

  1347         GstQuery *query = gst_query_new_duration (GST_FORMAT_BYTES);

  1348         if (gst_pad_query (peer, query)) {

  1349             gint64 duration;

  1350 

  1351             gst_query_parse_duration (query, NULL, &duration);

  1352             nuv->priv->duration_bytes = duration;

  1353         }

  1354         gst_object_unref (peer);

  1355         gst_query_unref (query);

  1356     }

  1357     return nuv->priv->duration_bytes;

  1358 }

  1359 

  1360 static gint64

  1361 gst_nuv_demux_get_time_duration (GstNuvDemux *nuv)

  1362 {

  1363     if (nuv->priv->duration_time == GST_CLOCK_TIME_NONE) {

  1364         GstPad *peer = gst_pad_get_peer (nuv->priv->sinkpad);

  1365         GstQuery *query = gst_query_new_duration (GST_FORMAT_TIME);

  1366         if (gst_pad_query (peer, query)) {

  1367             gint64 duration;

  1368             gst_query_parse_duration (query, NULL, &duration);

  1369             nuv->priv->duration_time = duration;

  1370         }

  1371         gst_object_unref (peer);

  1372         gst_query_unref (query);

  1373     }

  1374     return nuv->priv->duration_time;

  1375 }

  1376 

  1377 #if (GST_VERSION_MINOR == 10) && (GST_VERSION_MICRO < 6) 

  1378 GstBuffer *

  1379 gst_adapter_take_buffer (GstAdapter * adapter, guint nbytes)

  1380 {

  1381   GstBuffer *buffer;

  1382   GstBuffer *cur;

  1383   guint8 *data;

  1384 

  1385   g_return_val_if_fail (GST_IS_ADAPTER (adapter), NULL);

  1386   g_return_val_if_fail (nbytes > 0, NULL);

  1387 

  1388   GST_LOG_OBJECT (adapter, "taking buffer of %u bytes", nbytes);

  1389 

  1390   /* we don't have enough data, return NULL. This is unlikely

  1391    * as one usually does an _available() first instead of peeking a

  1392    * random size. */

  1393   if (G_UNLIKELY (nbytes > adapter->size))

  1394     return NULL;

  1395 

  1396   /* our head buffer has enough data left, return it */

  1397   cur = adapter->buflist->data;

  1398   if (GST_BUFFER_SIZE (cur) >= nbytes + adapter->skip) {

  1399     GST_LOG_OBJECT (adapter, "providing buffer of %d bytes via sub-buffer",

  1400         nbytes);

  1401     buffer = gst_buffer_create_sub (cur, adapter->skip, nbytes);

  1402 

  1403     gst_adapter_flush (adapter, nbytes);

  1404 

  1405     return buffer;

  1406   }

  1407 

  1408   data = gst_adapter_take (adapter, nbytes);

  1409   if (data == NULL)

  1410     return NULL;

  1411 

  1412   buffer = gst_buffer_new ();

  1413   GST_BUFFER_DATA (buffer) = data;

  1414   GST_BUFFER_MALLOCDATA (buffer) = data;

  1415   GST_BUFFER_SIZE (buffer) = nbytes;

  1416 

  1417   return buffer;

  1418 }

  1419 #endif

  1420 

  1421 

  1422 static gboolean

  1423 plugin_init (GstPlugin * plugin)

  1424 {

  1425 #ifdef ENABLE_NLS

  1426   setlocale (LC_ALL, "");

  1427   bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);

  1428 #endif /* ENABLE_NLS */

  1429 

  1430   if (!gst_element_register (plugin, "nuvdemux", GST_RANK_SECONDARY,

  1431           GST_TYPE_NUV_DEMUX)) {

  1432     return FALSE;

  1433   }

  1434   return TRUE;

  1435 }

  1436 

  1437 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,

  1438     GST_VERSION_MINOR,

  1439     "nuvdemux",

  1440     "Demuxes and muxes audio and video",

  1441      plugin_init, VERSION, "LGPL", "NuvDemux", "")

  1442
gmyth