Mercurialgmyth / file revision
summary | shortlog | changelog | graph | tags | branches | files | changeset | file | revisions | annotate | diff | raw
gst-gmyth/nuvdemux/gstnuvdemux.c
author rosfran
Thu May 24 19:33:13 2007 +0100 (2007-05-24)
branchtrunk
changeset 707 e2c57fecafde
parent 674 2af89a257a86
child 713 e8fe96f87916
permissions -rw-r--r--
[svn r713] Added more debug messages, and fixed a bug in the program info update. 
     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 #define GST_FLOW_ERROR_EOS	-102

    65 

    66 enum

    67 {

    68    NUV_PUSH_MODE = 0,

    69    NUV_PULL_MODE

    70 };

    71 

    72 GST_DEBUG_CATEGORY_EXTERN (GST_CAT_EVENT);

    73 

    74 static const GstElementDetails gst_nuv_demux_details =

    75 GST_ELEMENT_DETAILS ("Nuv demuxer",

    76     "Codec/Demuxer",

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

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

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

    80 

    81 

    82 /* file header */

    83 typedef struct

    84 {

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

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

    87 

    88     gint  i_width;

    89     gint  i_height;

    90     gint  i_width_desired;

    91     gint  i_height_desired;

    92 

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

    94 

    95     gdouble  d_aspect;       /* 1.0 squared pixel */

    96     gdouble  d_fps;

    97     //fps num/denom

    98     gint     i_fpsn;

    99     gint     i_fpsd;

   100 

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

   102     gint     i_audio_blocks;

   103     gint     i_text_blocks;

   104 

   105     gint     i_keyframe_distance;

   106 

   107 } nuv_header;

   108 

   109 /* frame header */

   110 typedef struct

   111 {

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

   113                            R: Seekpoint (string:RTjjjjjjjj)

   114                            D: Extra data for codec */

   115     gchar i_compression; /* V: 0 uncompressed

   116                               1 RTJpeg

   117                               2 RTJpeg+lzo

   118                               N black frame

   119                               L copy last

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

   121                               1 lzo

   122                               2 layer 2

   123                               3 layer 3

   124                               F flac

   125                               S shorten

   126                               N null frame loudless

   127                               L copy last

   128                             S: B audio and vdeo sync point

   129                                A audio sync info (timecode == effective

   130                                     dsp frequency*100)

   131                                V next video sync (timecode == next video

   132                                     frame num)

   133                                S audio,video,text correlation */

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

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

   136                            0x02: gauss 5 pixel (8,1,1,1,1)/12

   137                            0x04: cartoon filter */

   138 

   139     gint32 i_timecode;     /* ms */

   140 

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

   142                            S: length of packet correl */

   143 } nuv_frame_header;

   144 

   145 

   146 /* FIXME Not sure of this one */

   147 typedef struct

   148 {

   149     gint             i_version;

   150     guint32	     i_video_fcc;

   151 

   152     guint32	     i_audio_fcc;

   153     gint             i_audio_sample_rate;

   154     gint             i_audio_bits_per_sample;

   155     gint             i_audio_channels;

   156     gint             i_audio_compression_ratio;

   157     gint             i_audio_quality;

   158     gint             i_rtjpeg_quality;

   159     gint             i_rtjpeg_luma_filter;

   160     gint             i_rtjpeg_chroma_filter;

   161     gint             i_lavc_bitrate;

   162     gint             i_lavc_qmin;

   163     gint             i_lavc_qmax;

   164     gint             i_lavc_maxqdiff;

   165     gint64           i_seekable_offset;

   166     gint64           i_keyframe_adjust_offset;

   167 

   168 } nuv_extended_header;

   169 

   170 typedef struct

   171 {

   172   gint64 timecode;

   173   gint64 offset;

   174 

   175 } frame_index_data;

   176 

   177 typedef enum {

   178   GST_NUV_DEMUX_START,

   179   GST_NUV_DEMUX_HEADER_DATA,

   180   GST_NUV_DEMUX_EXTRA_DATA,

   181   GST_NUV_DEMUX_MPEG_DATA,

   182   GST_NUV_DEMUX_EXTEND_HEADER,

   183   GST_NUV_DEMUX_EXTEND_HEADER_DATA,

   184   GST_NUV_DEMUX_INDEX_CREATE,

   185   GST_NUV_DEMUX_FRAME_HEADER,

   186   GST_NUV_DEMUX_MOVI,

   187   GST_NUV_DEMUX_INVALID_DATA

   188 } GstNuvDemuxState;

   189 

   190 struct _GstNuvDemuxPrivate {

   191   /* used for indicate the mode */

   192   guint         mode;

   193 

   194   /* used on push mode */

   195   GstAdapter    *adapter;

   196 

   197   /* pads */

   198   GstPad        *sinkpad;

   199   GstPad        *src_video_pad;

   200   GstPad        *src_audio_pad;

   201 

   202   /* Flow control */

   203   GstFlowReturn     last_video_return;

   204   GstFlowReturn     last_audio_return;

   205   gboolean          more_data;

   206   gboolean	    eos;

   207 

   208   /* NUV decoding state */

   209   GstNuvDemuxState  state;

   210   guint64           offset;

   211 

   212   /* duration information */

   213   guint64            duration_bytes;

   214   guint64            duration_time;

   215   guint64            segment_stop;

   216   guint64            segment_start;

   217 

   218   /* segment control info */

   219   gboolean          new_audio_segment;

   220   gboolean          new_video_segment;

   221 

   222   /* Mpeg ExtraData */

   223   guint64           mpeg_data_size;

   224   GstBuffer         *mpeg_buffer;

   225 

   226   /* Headers */

   227   nuv_header h;

   228   nuv_extended_header eh;

   229   nuv_frame_header fh;

   230 

   231   /* anothers info */

   232   guint64           header_lengh;

   233   gint64            time_start;

   234   gint64            time_diff;

   235   gint64            time_qos;

   236   guint64           last_frame_time;

   237   GSList            *index;

   238 };

   239 

   240 

   241 static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",

   242     GST_PAD_SINK,

   243     GST_PAD_ALWAYS,

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

   245 

   246 static GstStaticPadTemplate audio_src_template =

   247 GST_STATIC_PAD_TEMPLATE ("audio_src",

   248     GST_PAD_SRC,

   249     GST_PAD_SOMETIMES,

   250     GST_STATIC_CAPS_ANY);

   251 

   252 static GstStaticPadTemplate video_src_template =

   253 GST_STATIC_PAD_TEMPLATE ("video_src",

   254     GST_PAD_SRC,

   255     GST_PAD_SOMETIMES,

   256     GST_STATIC_CAPS_ANY);

   257 

   258 static void gst_nuv_demux_dispose (GObject * object);

   259 static void gst_nuv_demux_finalize (GObject * object);

   260 static GstStateChangeReturn gst_nuv_demux_change_state (GstElement * element,

   261     GstStateChange transition);

   262 static void gst_nuv_demux_loop (GstPad * pad);

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

   264 static GstFlowReturn gst_nuv_demux_play (GstPad * pad);

   265 static gboolean gst_nuv_demux_sink_activate_pull (GstPad * sinkpad,

   266     gboolean active);

   267 static gboolean gst_nuv_demux_sink_activate_push (GstPad * pad,

   268     gboolean active);

   269 static gboolean gst_nuv_demux_sink_activate (GstPad * sinkpad);

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

   271 static gboolean gst_nuv_demux_srcpad_event  (GstPad * pad, GstEvent * event);

   272 static frame_index_data * gst_nuv_demux_do_seek_index (GstNuvDemux *nuv, gint64 seek_pos, 

   273   gint64 segment_stop, GstFormat format);

   274 

   275 

   276 

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

   278     gboolean move, GstBuffer ** buffer);

   279 static void gst_nuv_demux_reset (GstNuvDemux * nuv);

   280 static void gst_nuv_demux_destoy_src_pad (GstNuvDemux * nuv);

   281 static void gst_nuv_demux_send_eos (GstNuvDemux * nuv);

   282 static void gst_nuv_demux_create_seek_index (GstNuvDemux * nuv);

   283 

   284 

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

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

   287 #endif

   288 

   289 

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

   291 

   292 /******************************************************************************

   293  * Utils function

   294  ******************************************************************************/

   295 #if G_BYTE_ORDER == G_BIG_ENDIAN

   296 static inline gdouble

   297 _gdouble_swap_le_be (gdouble * d)

   298 {

   299   union

   300   {

   301     guint64 i;

   302     gdouble d;

   303   } u;

   304 

   305   u.d = *d;

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

   307   return u.d;

   308 }

   309 

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

   311 #else /* G_BYTE_ORDER != G_BIG_ENDIAN */

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

   313 #endif /* G_BYTE_ORDER != G_BIG_ENDIAN */

   314 

   315 static void

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

   317 {

   318     if (in == 29.97) {

   319         *num = 30000;

   320         *denom = 1001;

   321     } else if (in == 23.976) {

   322         *num = 24000;

   323         *denom = 1001;

   324     } else {

   325         *denom = 1;

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

   327             *denom *= 10;

   328             in *= 10.0;

   329         }

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

   331     }

   332 }

   333 

   334 /* GObject Functions */

   335 

   336 static void

   337 gst_nuv_demux_base_init (gpointer klass)

   338 {

   339   GstElementClass *element_class = GST_ELEMENT_CLASS (klass);

   340 

   341   gst_element_class_add_pad_template (element_class,

   342       gst_static_pad_template_get (&audio_src_template));

   343 

   344   gst_element_class_add_pad_template (element_class,

   345       gst_static_pad_template_get (&video_src_template));

   346 

   347   gst_element_class_add_pad_template (element_class,

   348       gst_static_pad_template_get (&sink_template));

   349   gst_element_class_set_details (element_class, &gst_nuv_demux_details);

   350 }

   351 

   352 static void

   353 gst_nuv_demux_class_init (GstNuvDemuxClass * klass)

   354 {

   355   GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);

   356   GObjectClass *gobject_class = (GObjectClass *) klass;

   357 

   358   GST_DEBUG_CATEGORY_INIT (nuvdemux_debug, "nuvdemux",

   359       0, "Demuxer for NUV streams");

   360 

   361   parent_class = g_type_class_peek_parent (klass);

   362 

   363   gobject_class->dispose = gst_nuv_demux_dispose;

   364   gobject_class->finalize = gst_nuv_demux_finalize;

   365   gstelement_class->change_state = gst_nuv_demux_change_state;

   366 

   367   g_type_class_add_private (gobject_class, sizeof (GstNuvDemuxPrivate));

   368 }

   369 

   370 static void

   371 gst_nuv_demux_init (GstNuvDemux * nuv, GstNuvDemuxClass * nuv_class)

   372 {

   373   nuv->priv = GST_NUV_DEMUX_GET_PRIVATE (nuv);

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

   375 

   376   /* creating adapter */

   377   nuv->priv->mode = NUV_PUSH_MODE;

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

   379 

   380   nuv->priv->new_audio_segment = TRUE;

   381   nuv->priv->new_video_segment = TRUE;

   382 

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

   384   gst_pad_set_activatepull_function (nuv->priv->sinkpad,

   385       gst_nuv_demux_sink_activate_pull);

   386   gst_pad_set_activatepush_function (nuv->priv->sinkpad,

   387       gst_nuv_demux_sink_activate_push);

   388   gst_pad_set_chain_function (nuv->priv->sinkpad,

   389       GST_DEBUG_FUNCPTR (gst_nuv_demux_chain));

   390 /*

   391   gst_pad_set_event_function (nuv->priv->sinkpad,

   392       gst_nuv_demux_sink_event);

   393 */

   394 

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

   396 

   397 }

   398 

   399 static void

   400 gst_nuv_demux_dispose (GObject * object)

   401 {

   402   GstNuvDemux *nuv = GST_NUV_DEMUX (object);

   403 

   404 

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

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

   407   }

   408 

   409   gst_nuv_demux_reset (GST_NUV_DEMUX (object));

   410   gst_nuv_demux_destoy_src_pad (GST_NUV_DEMUX (object));

   411 

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

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

   414   }

   415 }

   416 

   417 static void

   418 gst_nuv_demux_finalize (GObject * object)

   419 {

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

   421 }

   422 

   423 

   424 /* HeaderLoad:

   425  */

   426 static GstFlowReturn

   427 gst_nuv_demux_header_load (GstNuvDemux * nuv, nuv_header *h)

   428 {

   429   GstBuffer *buffer = NULL;

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

   431 

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

   433       goto done;

   434   }

   435 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

   451 

   452   GST_DEBUG_OBJECT (nuv,

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

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

   455       h->i_video_blocks, h->i_audio_blocks, h->i_text_blocks,

   456       h->i_keyframe_distance);

   457 

   458 done:

   459   if (buffer != NULL) {

   460      gst_buffer_unref (buffer);

   461      buffer = NULL;

   462   }

   463   return res;

   464 }

   465 

   466 static GstFlowReturn

   467 gst_nuv_demux_stream_header_data (GstNuvDemux * nuv)

   468 {

   469   GstFlowReturn res;

   470 

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

   472   if (res == GST_FLOW_OK)

   473     nuv->priv->state = GST_NUV_DEMUX_EXTRA_DATA;

   474   return res;

   475 }

   476 

   477 /*

   478  * Read NUV file tag

   479  */

   480 static GstFlowReturn

   481 gst_nuv_demux_stream_file_header (GstNuvDemux * nuv)

   482 {

   483   GstFlowReturn res = GST_FLOW_OK;

   484   GstBuffer *file_header = NULL;

   485 

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

   487   if (res == GST_FLOW_OK) {

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

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

   490       nuv->priv->state = GST_NUV_DEMUX_HEADER_DATA;

   491     } else {

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

   493       nuv->priv->state = GST_NUV_DEMUX_INVALID_DATA;

   494       res = GST_FLOW_ERROR;

   495     }

   496   }

   497 

   498   if (file_header != NULL) {

   499     gst_buffer_unref (file_header);

   500     file_header = NULL;

   501   }

   502   return res;

   503 }

   504 

   505 /* FrameHeaderLoad:

   506  */

   507 static GstFlowReturn

   508 gst_nuv_demux_frame_header_load (GstNuvDemux * nuv, nuv_frame_header *h)

   509 {

   510   unsigned char *data;

   511   GstBuffer *buf = NULL;

   512 

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

   514 

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

   516       goto done;

   517   }

   518 

   519   data = buf->data;

   520 

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

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

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

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

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

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

   527 

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

   529       h->i_type,

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

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

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

   533 

   534 done:  

   535   if (buf != NULL) {

   536       gst_buffer_unref (buf);

   537       buf = NULL;

   538   }

   539 

   540   return res;

   541 }

   542 

   543 static GstFlowReturn

   544 gst_nuv_demux_extended_header_load (GstNuvDemux * nuv,

   545     nuv_extended_header * h)

   546 {

   547   unsigned char *data;

   548   GstBuffer *buff = NULL;

   549 

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

   551 

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

   553       goto done;

   554   }

   555 

   556   data = buff->data;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

   574 

   575   GST_DEBUG_OBJECT (nuv,

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

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

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

   579       h->i_audio_sample_rate, h->i_audio_bits_per_sample, h->i_audio_channels,

   580       h->i_audio_compression_ratio, h->i_audio_quality, h->i_rtjpeg_quality,

   581       h->i_rtjpeg_luma_filter, h->i_rtjpeg_chroma_filter, h->i_lavc_bitrate,

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

   583       h->i_keyframe_adjust_offset);

   584 

   585 done:

   586   if (buff != NULL) {

   587     gst_buffer_unref (buff);

   588     buff = NULL;

   589   }

   590   return res;

   591 }

   592 

   593 

   594 /* Query Functions */

   595 static const GstQueryType *

   596 gst_nuv_demux_get_src_query_types (GstPad * pad)

   597 {

   598   static const GstQueryType src_types[] = {

   599     GST_QUERY_POSITION,

   600     GST_QUERY_DURATION,

   601     0

   602   };

   603 

   604   return src_types;

   605 }

   606 

   607 static gboolean

   608 gst_nuv_demux_handle_src_query (GstPad * pad, GstQuery * query)

   609 {

   610   gboolean res = FALSE;

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

   612 

   613 

   614   switch (GST_QUERY_TYPE (query)) 

   615   {

   616     case GST_QUERY_POSITION:

   617 	{

   618 		GstFormat format;

   619 		gst_query_parse_position (query, &format, NULL); 

   620 		switch (format) 

   621 		{

   622 			case GST_FORMAT_TIME:

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

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

   625 			        res = TRUE;

   626 				}

   627 			  	break;

   628 			default:				

   629 				break;

   630 		}

   631 		break;

   632 	}		

   633     case GST_QUERY_DURATION:

   634 	{

   635 	  GstFormat format;		

   636 	  gst_query_parse_duration (query, &format, NULL); 

   637 	  switch (format)

   638 	  {

   639 			case GST_FORMAT_TIME:			 

   640 				if (nuv->priv->duration_time != GST_CLOCK_TIME_NONE) {

   641 			        gst_query_set_duration (query, GST_FORMAT_TIME, nuv->priv->duration_time);

   642 				    res = TRUE;

   643 			    }

   644 				break;

   645 			default:				

   646 			    break;

   647 	  }

   648 	  break;

   649   	}

   650 	default:

   651 	  break;

   652   }

   653 

   654   if (res==FALSE) {

   655 	res = gst_pad_query_default (pad, query);		  

   656   } 

   657 

   658   gst_object_unref (nuv);

   659   return res;

   660 }

   661 

   662 static GstPad*

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

   664 {

   665     GstPad *pad = NULL;

   666     pad = gst_pad_new_from_static_template (template, name);

   667     gst_pad_set_caps (pad, caps);

   668     gst_pad_set_active (pad, TRUE);

   669     gst_pad_use_fixed_caps (pad);

   670     gst_element_add_pad (GST_ELEMENT (nuv), pad);

   671 

   672     gst_pad_set_event_function (pad,

   673       GST_DEBUG_FUNCPTR (gst_nuv_demux_srcpad_event));

   674 

   675     gst_pad_set_query_type_function (pad,

   676       GST_DEBUG_FUNCPTR (gst_nuv_demux_get_src_query_types));

   677 

   678     gst_pad_set_query_function (pad,

   679       GST_DEBUG_FUNCPTR (gst_nuv_demux_handle_src_query));

   680       

   681 

   682     return pad;

   683 }

   684 

   685 static void

   686 gst_nuv_demux_create_pads (GstNuvDemux * nuv)

   687 {

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

   689     GstCaps *video_caps = NULL;

   690 

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

   692         "divxversion", G_TYPE_INT, 4,

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

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

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

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

   697         "pixel-aspect-ratio", GST_TYPE_FRACTION,

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

   699 

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

   701     gst_caps_unref (video_caps);

   702   }

   703 

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

   705     GstCaps *audio_caps = NULL;

   706 

   707     audio_caps = gst_caps_new_simple ("audio/mpeg",

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

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

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

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

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

   713     

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

   715     gst_caps_unref (audio_caps);

   716   }

   717 

   718   gst_element_no_more_pads (GST_ELEMENT (nuv));

   719 }

   720 

   721 static gboolean

   722 gst_nuv_demux_validate_header (nuv_frame_header *h)

   723 {

   724   gboolean valid = FALSE;

   725   //g_usleep (1 * G_USEC_PER_SEC );

   726   switch  (h->i_type) {

   727 /*

   728     case 'V':

   729       if (h->i_compression == 0 ||

   730           h->i_compression == 1 ||

   731           h->i_compression == 2 ||

   732           h->i_compression == 'N' ||

   733           h->i_compression == 'L') {

   734          valid = TRUE;

   735       }

   736       break;

   737     case 'A':

   738       if (h->i_compression == 0 ||

   739           h->i_compression == 1 ||

   740           h->i_compression == 2 ||

   741           h->i_compression == 3 ||

   742           h->i_compression == 'F' ||

   743           h->i_compression == 'S' ||

   744           h->i_compression == 'N' ||

   745           h->i_compression == 'L') {

   746          valid = TRUE;

   747       }

   748       break;

   749     case 'S':

   750       if (h->i_compression == 'B' ||

   751           h->i_compression == 'A' ||

   752           h->i_compression == 'V' ||

   753           h->i_compression == 'S') {

   754          valid = TRUE;

   755       }

   756       break;

   757 */

   758     case 'A':

   759     case 'V':

   760     case 'S':

   761     case 'R':

   762     case 'D':

   763     case 'Q':

   764       valid  = TRUE;

   765       break;

   766     default:

   767       valid = FALSE;

   768   }

   769 

   770   return valid;

   771 }

   772 

   773 static GstFlowReturn

   774 gst_nuv_demux_read_head_frame (GstNuvDemux * nuv)

   775 {

   776   GstFlowReturn ret = GST_FLOW_OK;

   777   gboolean valid = FALSE;

   778 

   779   do {

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

   781     if (ret != GST_FLOW_OK) {

   782       return ret;

   783     }

   784 

   785     if (gst_nuv_demux_validate_header (&nuv->priv->fh) == TRUE)

   786       valid = TRUE;

   787 

   788   } while (valid == FALSE);

   789 

   790   nuv->priv->state = GST_NUV_DEMUX_MOVI;

   791   return ret;

   792 }

   793 

   794 static gboolean

   795 gst_nuv_combine_flow (GstNuvDemux *nuv)

   796 {

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

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

   799 

   800     if ((ret_video != GST_FLOW_OK) &&

   801         (ret_audio != GST_FLOW_OK))

   802         return FALSE;

   803 

   804     if (GST_FLOW_IS_FATAL (ret_video))

   805         return FALSE;

   806 

   807     if (GST_FLOW_IS_FATAL (ret_audio))

   808         return FALSE;

   809 

   810     return TRUE;

   811 }

   812 

   813 static GstFlowReturn

   814 gst_nuv_demux_stream_data (GstNuvDemux * nuv)

   815 {

   816   GstFlowReturn ret = GST_FLOW_OK;

   817   GstPad *pad = NULL;

   818   guint64 timestamp;

   819   GstBuffer *buf = NULL;

   820   nuv_frame_header h;

   821 

   822   h = nuv->priv->fh;

   823 

   824   if (h.i_type == 'R') {

   825     goto done;

   826   }

   827 

   828   if (h.i_length > 0) {

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

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

   831       goto done;

   832     }

   833 

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

   835       h.i_timecode = 0;

   836       //goto done;

   837     }

   838 

   839     timestamp = h.i_timecode * GST_MSECOND;

   840     GST_BUFFER_TIMESTAMP (buf) = timestamp;

   841   }

   842   else {

   843     goto done;

   844   }

   845 

   846 

   847   switch (h.i_type) {

   848     case 'V':

   849     {

   850       pad = nuv->priv->src_video_pad;

   851 

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

   853 

   854         /* send new segment event*/

   855         gst_pad_push_event (nuv->priv->src_video_pad,

   856           gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0,

   857                                      GST_CLOCK_TIME_NONE, 0));

   858 

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

   860             nuv->priv->time_start = timestamp;

   861         }

   862         nuv->priv->new_video_segment = FALSE;

   863       }

   864 

   865       break;

   866     }

   867     case 'A':

   868     {

   869       pad = nuv->priv->src_audio_pad;

   870 

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

   872         /* send new segment event*/

   873         gst_pad_push_event (nuv->priv->src_audio_pad,

   874           gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0,

   875                                      GST_CLOCK_TIME_NONE, 0));

   876 

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

   878             nuv->priv->time_start = timestamp;

   879         }

   880         nuv->priv->new_audio_segment = FALSE;

   881       }

   882 

   883       break;

   884     }

   885     case 'S':

   886    {

   887       switch (h.i_compression) {

   888         case 'V':

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

   890           gst_pad_push_event (nuv->priv->src_video_pad,

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

   892               		GST_CLOCK_TIME_NONE, 0));

   893           break;

   894         case 'A':

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

   896           gst_pad_push_event (nuv->priv->src_audio_pad,

   897               gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0,

   898               		GST_CLOCK_TIME_NONE, 0));

   899           break;

   900         default:

   901           break;

   902       }

   903       goto done;

   904     }

   905     default:

   906       break;

   907   }

   908 

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

   910       /* pushing the buffer */

   911       gst_buffer_set_caps (buf, GST_PAD_CAPS (pad));

   912       ret = gst_pad_push (pad, buf);

   913       buf = NULL;

   914 

   915       if (ret != GST_FLOW_OK) {

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

   917 

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

   919             nuv->priv->last_video_return = ret;

   920         }

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

   922             nuv->priv->last_audio_return = ret;

   923         }

   924 

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

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

   927           ret = GST_FLOW_OK;

   928         } else {

   929 	  GST_WARNING_OBJECT (nuv, "error: on push");

   930 	}

   931 

   932       }

   933   } 

   934 

   935 done:

   936   if (buf != NULL) {

   937       gst_buffer_unref (buf);

   938       buf = NULL;

   939   }

   940   if (ret == GST_FLOW_OK) {

   941      nuv->priv->state = GST_NUV_DEMUX_FRAME_HEADER;

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

   943   }

   944   return ret;

   945 }

   946 

   947 static GstFlowReturn

   948 gst_nuv_demux_stream_mpeg_data (GstNuvDemux * nuv)

   949 {

   950   GstFlowReturn ret = GST_FLOW_OK;

   951 

   952   /* ffmpeg extra data */

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

   954       &nuv->priv->mpeg_buffer);

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

   956     return ret;

   957   }

   958 

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

   960   nuv->priv->state = GST_NUV_DEMUX_EXTEND_HEADER;

   961   return ret;

   962 }

   963 

   964 static GstFlowReturn

   965 gst_nuv_demux_stream_extra_data (GstNuvDemux * nuv)

   966 {

   967   GstFlowReturn ret = GST_FLOW_OK;

   968 

   969   /* Load 'D' */

   970   nuv_frame_header h;

   971 

   972   ret = gst_nuv_demux_frame_header_load (nuv, &h);

   973   if (ret != GST_FLOW_OK)

   974     return ret;

   975 

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

   977     GST_WARNING_OBJECT (nuv, "Unsuported rtjpeg");

   978     return GST_FLOW_NOT_SUPPORTED;

   979   }

   980 

   981   if (h.i_length > 0) {

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

   983       nuv->priv->state = GST_NUV_DEMUX_MPEG_DATA;

   984     } else {

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

   986       return GST_FLOW_NOT_SUPPORTED;

   987     }

   988   } else {

   989     nuv->priv->state = GST_NUV_DEMUX_EXTEND_HEADER;

   990   }

   991 

   992   return ret;

   993 }

   994 

   995 static GstFlowReturn

   996 gst_nuv_demux_stream_extend_header_data (GstNuvDemux * nuv)

   997 {

   998   GstFlowReturn ret = GST_FLOW_OK;

   999 

  1000   ret = gst_nuv_demux_extended_header_load (nuv, &nuv->priv->eh);

  1001   if (ret != GST_FLOW_OK)

  1002     return ret;

  1003 

  1004   gst_nuv_demux_create_pads (nuv);

  1005   nuv->priv->state = GST_NUV_DEMUX_INDEX_CREATE;

  1006   return ret;

  1007 }

  1008 

  1009 static GstFlowReturn

  1010 gst_nuv_demux_stream_extend_header (GstNuvDemux * nuv)

  1011 {

  1012   GstBuffer *buf = NULL;

  1013   GstFlowReturn res = GST_FLOW_OK;

  1014 

  1015   res = gst_nuv_demux_read_bytes (nuv, 1, FALSE, &buf);

  1016   if ((res != GST_FLOW_OK) || (buf == NULL)) {

  1017     if (buf != NULL) {

  1018       gst_buffer_unref (buf);

  1019     }

  1020     return res;

  1021   }

  1022 

  1023   if (buf->data[0] == 'X') {

  1024     gst_buffer_unref (buf);

  1025     buf = NULL;

  1026     nuv_frame_header h;

  1027 

  1028     res = gst_nuv_demux_frame_header_load (nuv, &h);

  1029     if (res != GST_FLOW_OK)

  1030       return res;

  1031 

  1032     if (h.i_length != 512) {

  1033       return GST_FLOW_ERROR;

  1034     }

  1035     nuv->priv->state = GST_NUV_DEMUX_EXTEND_HEADER_DATA;

  1036   } else {

  1037     nuv->priv->state = GST_NUV_DEMUX_INVALID_DATA;

  1038     g_object_unref (buf);

  1039     GST_ELEMENT_WARNING (nuv, STREAM, FAILED,

  1040         (_("incomplete NUV support")), ("incomplete NUV support"));

  1041     return GST_FLOW_ERROR;

  1042   }

  1043   return res;

  1044 }

  1045 

  1046 static void

  1047 gst_nuv_demux_create_seek_index (GstNuvDemux * nuv)

  1048 {

  1049   GstMessage *msg;

  1050   nuv_frame_header h;

  1051 

  1052   while (gst_nuv_demux_frame_header_load (nuv, &h) == GST_FLOW_OK) {

  1053     if ((h.i_type == 'V') && (h.i_keyframe == 0)) {

  1054       frame_index_data *f = g_new0 (frame_index_data, 1);

  1055 

  1056       f->offset = nuv->priv->offset - 12;

  1057       f->timecode = h.i_timecode * GST_MSECOND;

  1058 

  1059       nuv->priv->index = g_slist_append (nuv->priv->index, f);

  1060     } 

  1061     if (h.i_type != 'R') {

  1062       nuv->priv->offset += h.i_length;

  1063 		  if (h.i_type == 'A' || h.i_type == 'V')

  1064   		  nuv->priv->duration_time = h.i_timecode * GST_MSECOND;

  1065     }

  1066   }

  1067   GST_DEBUG_OBJECT  (nuv, "CREATING INDEX: DONE : DURATION Bytes/Sec: %" G_GUINT64_FORMAT "/%" G_GUINT64_FORMAT, 

  1068     nuv->priv->offset, nuv->priv->duration_time);

  1069   

  1070   nuv->priv->duration_bytes = nuv->priv->offset;

  1071   nuv->priv->offset = nuv->priv->header_lengh;

  1072 

  1073   msg = gst_message_new_duration (GST_OBJECT (nuv), GST_FORMAT_TIME, nuv->priv->duration_time);

  1074   gst_element_post_message (GST_ELEMENT (nuv), msg);

  1075 }

  1076 

  1077 static GstFlowReturn

  1078 gst_nuv_demux_play (GstPad * pad)

  1079 {

  1080   GstFlowReturn res = GST_FLOW_OK;

  1081   GstNuvDemux *nuv = GST_NUV_DEMUX (GST_PAD_PARENT (pad));

  1082 

  1083   switch (nuv->priv->state) {

  1084     case GST_NUV_DEMUX_START:

  1085       res = gst_nuv_demux_stream_file_header (nuv);

  1086       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

  1087         goto pause;

  1088       }

  1089       break;

  1090 

  1091     case GST_NUV_DEMUX_HEADER_DATA:

  1092       res = gst_nuv_demux_stream_header_data (nuv);

  1093       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

  1094         goto pause;

  1095       }

  1096       break;

  1097 

  1098     case GST_NUV_DEMUX_EXTRA_DATA:

  1099       res = gst_nuv_demux_stream_extra_data (nuv);

  1100       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

  1101         goto pause;

  1102       }

  1103       break;

  1104 

  1105     case GST_NUV_DEMUX_MPEG_DATA:

  1106       res = gst_nuv_demux_stream_mpeg_data (nuv);

  1107       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

  1108         goto pause;

  1109       }

  1110       break;

  1111 

  1112     case GST_NUV_DEMUX_EXTEND_HEADER:

  1113       res = gst_nuv_demux_stream_extend_header (nuv);

  1114       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

  1115         goto pause;

  1116       }

  1117       break;

  1118 

  1119     case GST_NUV_DEMUX_EXTEND_HEADER_DATA:

  1120       res = gst_nuv_demux_stream_extend_header_data (nuv);

  1121       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

  1122         goto pause;

  1123       }

  1124       //store file header size

  1125       nuv->priv->header_lengh = nuv->priv->offset;

  1126       break;

  1127 

  1128     case GST_NUV_DEMUX_INDEX_CREATE:

  1129       if (nuv->priv->mode == NUV_PULL_MODE) {

  1130         gst_nuv_demux_create_seek_index (nuv);

  1131       }

  1132 

  1133     case GST_NUV_DEMUX_FRAME_HEADER:

  1134       res = gst_nuv_demux_read_head_frame (nuv);

  1135       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

  1136         goto pause;

  1137       }

  1138       break;

  1139 

  1140     case GST_NUV_DEMUX_MOVI: 

  1141       res = gst_nuv_demux_stream_data (nuv);

  1142       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

  1143         goto pause;

  1144       }

  1145       break;

  1146 

  1147     case GST_NUV_DEMUX_INVALID_DATA:

  1148       goto pause;

  1149       break;

  1150     default:

  1151       g_assert_not_reached ();

  1152   }

  1153 

  1154   return GST_FLOW_OK;

  1155 

  1156 pause:

  1157   GST_LOG_OBJECT (nuv, "pausing task, reason %s", gst_flow_get_name (res));

  1158   gst_pad_pause_task (nuv->priv->sinkpad);

  1159 

  1160   if (res == GST_FLOW_ERROR_EOS) {

  1161     gst_nuv_demux_send_eos (nuv);

  1162     nuv->priv->eos = TRUE;

  1163     res = GST_FLOW_OK;

  1164   }

  1165 

  1166   if (GST_FLOW_IS_FATAL (res)) {

  1167     GST_ELEMENT_ERROR (nuv, STREAM, FAILED,

  1168         (_("Internal data stream error.")),

  1169         ("streaming stopped, reason %s", gst_flow_get_name (res)));

  1170 

  1171     gst_nuv_demux_send_eos (nuv);

  1172   }

  1173   return res;

  1174 }

  1175 

  1176 static void

  1177 gst_nuv_demux_send_eos (GstNuvDemux * nuv)

  1178 {

  1179   gst_element_post_message (GST_ELEMENT (nuv),

  1180       gst_message_new_segment_done (GST_OBJECT (nuv), GST_FORMAT_TIME, -1));

  1181 

  1182   if (nuv->priv->src_video_pad)

  1183     gst_pad_push_event (nuv->priv->src_video_pad, gst_event_new_eos ());

  1184   if (nuv->priv->src_audio_pad)

  1185     gst_pad_push_event (nuv->priv->src_audio_pad, gst_event_new_eos ());

  1186 }

  1187 

  1188 static GstFlowReturn

  1189 gst_nuv_demux_read_bytes (GstNuvDemux * nuv, guint64 size, gboolean move,

  1190     GstBuffer ** buffer)

  1191 {

  1192   GstFlowReturn ret = GST_FLOW_OK;

  1193 

  1194   if (size == 0) {

  1195     return ret;

  1196   }

  1197 

  1198 

  1199   if (nuv->priv->mode == NUV_PULL_MODE) {

  1200     ret = gst_pad_pull_range (nuv->priv->sinkpad, nuv->priv->offset, size, buffer);

  1201     if (ret == GST_FLOW_OK) {

  1202       if (move) {

  1203         nuv->priv->offset += size;

  1204       }

  1205       /* got eos */

  1206     } else if (ret == GST_FLOW_UNEXPECTED) {

  1207       return GST_FLOW_ERROR_EOS;

  1208     }

  1209   } else {

  1210     if (gst_adapter_available (nuv->priv->adapter) < size) {

  1211       nuv->priv->more_data = TRUE;

  1212       return GST_FLOW_ERROR_NO_DATA;

  1213     }

  1214     if (move) {

  1215       *buffer = gst_adapter_take_buffer (nuv->priv->adapter, size);

  1216     } else {

  1217       guint8 *data = NULL;

  1218       data = (guint8 *) gst_adapter_peek (nuv->priv->adapter, size);

  1219       *buffer = gst_buffer_new ();

  1220       gst_buffer_set_data (*buffer, data, size);

  1221     }

  1222   }

  1223   return ret;

  1224 }

  1225 

  1226 static gboolean

  1227 gst_nuv_demux_sink_activate (GstPad * sinkpad)

  1228 {

  1229   gboolean res = TRUE;

  1230   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (sinkpad));

  1231  

  1232   if (gst_pad_check_pull_range (sinkpad)) {

  1233     gst_adapter_clear (nuv->priv->adapter);

  1234     res = gst_pad_activate_pull (sinkpad, TRUE);

  1235   } else {

  1236     gst_adapter_clear (nuv->priv->adapter);

  1237     res = gst_pad_activate_push (sinkpad, TRUE);

  1238   }

  1239   

  1240   g_object_unref (nuv);

  1241   return res;

  1242 }

  1243 

  1244 static gboolean

  1245 gst_nuv_demux_sink_activate_pull (GstPad * sinkpad, gboolean active)

  1246 {

  1247   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (sinkpad));

  1248 

  1249   if (active) {

  1250     GST_DEBUG_OBJECT (nuv, "activating pull function");

  1251     nuv->priv->mode = NUV_PULL_MODE;

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

  1253 

  1254     gst_pad_start_task (sinkpad, (GstTaskFunction) gst_nuv_demux_loop, sinkpad);

  1255   } else {

  1256     GST_DEBUG_OBJECT (nuv, "deactivating pull function");

  1257     gst_pad_stop_task (sinkpad);

  1258   }

  1259   gst_object_unref (nuv);

  1260 

  1261   return TRUE;

  1262 }

  1263 

  1264 static gboolean

  1265 gst_nuv_demux_sink_activate_push (GstPad * pad, gboolean active)

  1266 {

  1267   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

  1268 

  1269   if (active) {

  1270     nuv->priv->mode = NUV_PUSH_MODE;

  1271     gst_adapter_clear (nuv->priv->adapter);

  1272 

  1273     GST_DEBUG_OBJECT (nuv, "activating push/chain function");

  1274   } else {

  1275     GST_DEBUG_OBJECT (nuv, "deactivating push/chain function");

  1276   }

  1277 

  1278   gst_object_unref (nuv);

  1279 

  1280   return TRUE;

  1281 }

  1282 

  1283 static frame_index_data *

  1284 gst_nuv_demux_do_seek_index (GstNuvDemux *nuv, gint64 seek_pos, 

  1285   gint64 segment_stop, GstFormat format)

  1286 {

  1287   GSList *l;

  1288   frame_index_data *ret = NULL;

  1289 

  1290   if (nuv->priv->index == NULL) {

  1291     return NULL;

  1292   }

  1293 

  1294   /* find keyframe closest to the requested position  */

  1295   for (l = nuv->priv->index; l != NULL; l = l->next) {

  1296     frame_index_data *f = (frame_index_data *) l->data;  

  1297     gint64 pos = 0;

  1298    

  1299     if (format == GST_FORMAT_BYTES) {     

  1300       pos = f->offset;

  1301     } else if (format == GST_FORMAT_TIME) {

  1302       pos = f->timecode;

  1303     } else {

  1304       return NULL;

  1305     }

  1306 

  1307     if (pos >= seek_pos) {

  1308       ret = f;

  1309       break;

  1310     }

  1311 

  1312     if ((segment_stop != -1) &&  (segment_stop != GST_CLOCK_TIME_NONE) && (pos > segment_stop)) {

  1313       break;

  1314     }

  1315   } 

  1316 

  1317   return ret;

  1318 }

  1319 

  1320 static gboolean

  1321 gst_nuv_demux_do_seek (GstNuvDemux *nuv, GstEvent * event)

  1322 {

  1323   gdouble rate;

  1324   GstFormat format;

  1325   GstSeekFlags flags;

  1326   GstSeekType cur_type;

  1327   gint64 cur;

  1328   GstSeekType stop_type;

  1329   gint64 stop;

  1330   gboolean flush;

  1331   frame_index_data *entry;

  1332   gint64 segment_start;

  1333   gint64 segment_stop;

  1334   GstEvent *newsegment_event;

  1335 

  1336   if (nuv->priv->eos) {

  1337     return FALSE;

  1338   }

  1339 

  1340   if (nuv->priv->mode == NUV_PUSH_MODE) {

  1341     return FALSE;

  1342   }

  1343 

  1344 

  1345   gst_event_parse_seek (event, &rate, &format, &flags,

  1346       &cur_type, &cur, &stop_type, &stop);

  1347 

  1348 

  1349 

  1350 /*

  1351   if (format == GST_FORMAT_TIME) {

  1352     GST_DEBUG_OBJECT (nuv, "Can only seek on BYTES");

  1353     return FALSE;

  1354   }

  1355 */

  1356 

  1357   if (rate <= 0.0) {

  1358     GST_DEBUG_OBJECT (nuv, "Can only seek with positive rate");

  1359     return FALSE;

  1360   }

  1361   

  1362   if (cur_type == GST_SEEK_TYPE_SET) {

  1363     GST_OBJECT_LOCK (nuv);

  1364     if (gst_nuv_demux_do_seek_index (nuv, cur, -1, format) == NULL) {

  1365       GST_DEBUG_OBJECT (nuv, "No matching seek entry in index");

  1366       GST_OBJECT_UNLOCK (nuv);

  1367       return FALSE;

  1368     }

  1369     GST_OBJECT_UNLOCK (nuv);

  1370   }

  1371 

  1372   flush = !!(flags & GST_SEEK_FLAG_FLUSH);

  1373   

  1374   if (flush) {

  1375     gst_pad_push_event (nuv->priv->sinkpad, gst_event_new_flush_start ());

  1376     if (nuv->priv->src_video_pad != NULL) {

  1377       gst_pad_push_event (nuv->priv->src_video_pad, gst_event_new_flush_start ());

  1378     }

  1379 

  1380     if (nuv->priv->src_audio_pad != NULL) {

  1381       gst_pad_push_event (nuv->priv->src_audio_pad, gst_event_new_flush_start ());

  1382     }

  1383   }

  1384   else {

  1385     gst_pad_pause_task (nuv->priv->sinkpad);

  1386   }

  1387 

  1388   GST_PAD_STREAM_LOCK (nuv->priv->sinkpad);

  1389   GST_OBJECT_LOCK (nuv);

  1390 

  1391 

  1392   if (cur == GST_CLOCK_TIME_NONE)

  1393     cur = 0;

  1394   if (stop == GST_CLOCK_TIME_NONE)

  1395     stop = nuv->priv->duration_time;

  1396 

  1397   if (cur_type == GST_SEEK_TYPE_SET)

  1398     segment_start = cur;

  1399   else if (cur_type == GST_SEEK_TYPE_CUR)

  1400     segment_start = nuv->priv->segment_start + cur;

  1401   else

  1402     segment_start = nuv->priv->segment_start;

  1403 

  1404   if (stop_type == GST_SEEK_TYPE_SET)

  1405     segment_stop = stop;

  1406   else if (stop_type == GST_SEEK_TYPE_CUR)

  1407     segment_stop = nuv->priv->segment_stop + stop;

  1408   else

  1409     segment_stop = nuv->priv->segment_stop;

  1410 

  1411   segment_start = CLAMP (segment_start, 0, nuv->priv->duration_time);

  1412   segment_stop = CLAMP (segment_stop, 0, nuv->priv->duration_time);

  1413 

  1414   entry = gst_nuv_demux_do_seek_index (nuv, segment_start,

  1415       segment_stop, format);

  1416 

  1417   if (entry == NULL) {

  1418     GST_DEBUG_OBJECT (nuv, "No matching seek entry in index");

  1419     goto seek_error;

  1420   }

  1421 

  1422   segment_start = entry->timecode;

  1423 

  1424   nuv->priv->segment_start = segment_start;

  1425   nuv->priv->segment_stop = segment_stop;

  1426 

  1427   GST_OBJECT_UNLOCK (nuv);

  1428 

  1429   if (!nuv->priv->eos) {

  1430     GstMessage *msg;

  1431     msg = gst_message_new_segment_start (GST_OBJECT (nuv), GST_FORMAT_TIME,

  1432       nuv->priv->segment_start);

  1433   

  1434     gst_element_post_message (GST_ELEMENT (nuv), msg);

  1435   }

  1436 

  1437   GST_DEBUG_OBJECT (nuv, "NEW SEGMENT START %" G_GUINT64_FORMAT ", STOP %" G_GUINT64_FORMAT, 

  1438     segment_start, segment_stop);

  1439   newsegment_event = gst_event_new_new_segment (FALSE, rate,

  1440     GST_FORMAT_TIME, segment_start, segment_stop, segment_start);

  1441 

  1442 

  1443   if (flush) {

  1444     if (nuv->priv->src_video_pad != NULL) {

  1445       gst_pad_push_event (nuv->priv->src_video_pad, gst_event_new_flush_stop ());

  1446     }

  1447 

  1448     if (nuv->priv->src_audio_pad != NULL) {

  1449       gst_pad_push_event (nuv->priv->src_audio_pad, gst_event_new_flush_stop ());

  1450     }

  1451 

  1452     gst_pad_push_event (nuv->priv->sinkpad, gst_event_new_flush_stop ());

  1453   }

  1454 

  1455   

  1456   if (nuv->priv->src_video_pad != NULL) {

  1457     gst_pad_push_event (nuv->priv->src_video_pad, gst_event_ref (newsegment_event));

  1458   }

  1459   if (nuv->priv->src_audio_pad != NULL) {

  1460     gst_pad_push_event (nuv->priv->src_audio_pad, gst_event_ref (newsegment_event));

  1461   } 

  1462 

  1463   gst_event_unref (newsegment_event);

  1464 

  1465   nuv->priv->state = GST_NUV_DEMUX_FRAME_HEADER;

  1466   nuv->priv->offset = entry->offset;

  1467 

  1468   gst_pad_start_task (nuv->priv->sinkpad, (GstTaskFunction) gst_nuv_demux_loop,

  1469       nuv->priv->sinkpad);

  1470 

  1471   GST_PAD_STREAM_UNLOCK (nuv->priv->sinkpad);

  1472   return TRUE;

  1473 

  1474 seek_error:

  1475   GST_DEBUG_OBJECT (nuv, "Got a seek error");

  1476   GST_OBJECT_UNLOCK (nuv);

  1477   GST_PAD_STREAM_UNLOCK (nuv->priv->sinkpad);

  1478   return FALSE;

  1479 

  1480 }

  1481 

  1482 static gboolean

  1483 gst_nuv_demux_srcpad_event (GstPad * pad, GstEvent * event)

  1484 {

  1485   gboolean res = FALSE;

  1486   GstNuvDemux *nuv;

  1487 

  1488   nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

  1489   

  1490   switch (GST_EVENT_TYPE (event)) {

  1491     case GST_EVENT_SEEK:

  1492       res = gst_nuv_demux_do_seek (nuv, event);

  1493       break;

  1494     default:

  1495       res = FALSE;

  1496       break;

  1497   }

  1498   

  1499   gst_object_unref (nuv);

  1500   return res;

  1501 }

  1502 

  1503 static GstFlowReturn

  1504 gst_nuv_demux_chain (GstPad * pad, GstBuffer * buf)

  1505 {

  1506   GstFlowReturn ret = GST_FLOW_OK;

  1507   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

  1508   

  1509   if (nuv->priv->mode != NUV_PUSH_MODE)

  1510     return ret;

  1511 

  1512   gst_adapter_push (nuv->priv->adapter, buf);  

  1513   

  1514   while ((ret == GST_FLOW_OK) && (nuv->priv->more_data == FALSE)) {

  1515       ret = gst_nuv_demux_play (pad);

  1516   }

  1517 

  1518   nuv->priv->more_data = FALSE;

  1519   gst_object_unref (nuv);

  1520 

  1521   return ret;

  1522 }

  1523 

  1524 static void

  1525 gst_nuv_demux_loop (GstPad * pad)

  1526 {

  1527   gst_nuv_demux_play (pad);

  1528 }

  1529 

  1530 static void

  1531 gst_nuv_demux_index_free (gpointer data, gpointer user_data)

  1532 {

  1533   g_free (data);

  1534 }

  1535 

  1536 static void

  1537 gst_nuv_demux_reset (GstNuvDemux * nuv)

  1538 {

  1539   nuv->priv->eos = FALSE;

  1540   nuv->priv->more_data = FALSE;

  1541   nuv->priv->state = GST_NUV_DEMUX_START;

  1542   nuv->priv->mode = NUV_PUSH_MODE;

  1543   nuv->priv->offset = 0;

  1544   nuv->priv->time_start = 0;

  1545   nuv->priv->time_qos = GST_CLOCK_TIME_NONE;

  1546   nuv->priv->duration_bytes = GST_CLOCK_TIME_NONE;

  1547   nuv->priv->duration_time = GST_CLOCK_TIME_NONE;

  1548   nuv->priv->last_video_return = GST_FLOW_OK;

  1549   nuv->priv->last_audio_return = GST_FLOW_OK;

  1550   nuv->priv->header_lengh = 0;

  1551   nuv->priv->segment_stop = GST_CLOCK_TIME_NONE;

  1552   nuv->priv->segment_start = GST_CLOCK_TIME_NONE;

  1553 

  1554   //clear index list

  1555   g_slist_foreach (nuv->priv->index, gst_nuv_demux_index_free, NULL);

  1556   g_slist_free (nuv->priv->index);

  1557   nuv->priv->index = NULL;

  1558 

  1559   gst_adapter_clear (nuv->priv->adapter);

  1560 

  1561   if (nuv->priv->mpeg_buffer != NULL) {

  1562     gst_buffer_unref (nuv->priv->mpeg_buffer);

  1563     nuv->priv->mpeg_buffer = NULL;

  1564   }

  1565 }

  1566 

  1567 static void

  1568 gst_nuv_demux_destoy_src_pad (GstNuvDemux * nuv)

  1569 {

  1570   if (nuv->priv->src_video_pad) {

  1571     gst_element_remove_pad (GST_ELEMENT (nuv), nuv->priv->src_video_pad);

  1572     nuv->priv->src_video_pad = NULL;

  1573   }

  1574 

  1575   if (nuv->priv->src_audio_pad) {

  1576     gst_element_remove_pad (GST_ELEMENT (nuv), nuv->priv->src_audio_pad);

  1577     nuv->priv->src_audio_pad = NULL;

  1578   }

  1579 }

  1580 

  1581 static GstStateChangeReturn

  1582 gst_nuv_demux_change_state (GstElement * element, GstStateChange transition)

  1583 {

  1584   GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;

  1585 

  1586   g_debug ("Nuvdemux state_change");

  1587   switch (transition) {

  1588     case GST_STATE_CHANGE_NULL_TO_READY:

  1589       gst_nuv_demux_reset (GST_NUV_DEMUX (element));

  1590       gst_nuv_demux_destoy_src_pad (GST_NUV_DEMUX (element));

  1591       break;

  1592     default:

  1593       break;

  1594   }

  1595 

  1596   g_debug ("Nuvdemux state_change: 1");

  1597 

  1598   ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);

  1599   if (ret == GST_STATE_CHANGE_FAILURE) {

  1600     goto done;

  1601   }

  1602 

  1603 

  1604   g_debug ("Nuvdemux state_change: 2");

  1605 

  1606   switch (transition) {

  1607     case GST_STATE_CHANGE_READY_TO_NULL:

  1608       gst_nuv_demux_reset (GST_NUV_DEMUX (element));

  1609       gst_nuv_demux_destoy_src_pad (GST_NUV_DEMUX (element));

  1610       break;

  1611     default:

  1612       break;

  1613   }

  1614 

  1615 

  1616   g_debug ("Nuvdemux state_change: DONE");

  1617 

  1618 done:

  1619   return ret;

  1620 }

  1621 

  1622 #if (GST_VERSION_MINOR == 10) && (GST_VERSION_MICRO < 6) 

  1623 GstBuffer *

  1624 gst_adapter_take_buffer (GstAdapter * adapter, guint nbytes)

  1625 {

  1626   GstBuffer *buffer;

  1627   GstBuffer *cur;

  1628   guint8 *data;

  1629 

  1630   g_return_val_if_fail (GST_IS_ADAPTER (adapter), NULL);

  1631   g_return_val_if_fail (nbytes > 0, NULL);

  1632 

  1633   GST_LOG_OBJECT (adapter, "taking buffer of %u bytes", nbytes);

  1634 

  1635   /* we don't have enough data, return NULL. This is unlikely

  1636    * as one usually does an _available() first instead of peeking a

  1637    * random size. */

  1638   if (G_UNLIKELY (nbytes > adapter->size))

  1639     return NULL;

  1640 

  1641   /* our head buffer has enough data left, return it */

  1642   cur = adapter->buflist->data;

  1643   if (GST_BUFFER_SIZE (cur) >= nbytes + adapter->skip) {

  1644     GST_LOG_OBJECT (adapter, "providing buffer of %d bytes via sub-buffer",

  1645         nbytes);

  1646     buffer = gst_buffer_create_sub (cur, adapter->skip, nbytes);

  1647 

  1648     gst_adapter_flush (adapter, nbytes);

  1649 

  1650     return buffer;

  1651   }

  1652 

  1653   data = gst_adapter_take (adapter, nbytes);

  1654   if (data == NULL)

  1655     return NULL;

  1656 

  1657   buffer = gst_buffer_new ();

  1658   GST_BUFFER_DATA (buffer) = data;

  1659   GST_BUFFER_MALLOCDATA (buffer) = data;

  1660   GST_BUFFER_SIZE (buffer) = nbytes;

  1661 

  1662   return buffer;

  1663 }

  1664 #endif

  1665 

  1666 static void

  1667 gst_nuv_typefind (GstTypeFind * tf, gpointer unused)

  1668 {

  1669   guint8 *data = gst_type_find_peek (tf, 0, 11);

  1670 

  1671   if (data) {

  1672     if (memcmp (data, "MythTVVideo", 11) == 0

  1673         || memcmp (data, "NuppelVideo", 11) == 0) {

  1674       gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, 

  1675           gst_caps_new_simple ("video/x-nuv", NULL));

  1676     }

  1677   }

  1678 }

  1679 

  1680 static gboolean

  1681 plugin_init (GstPlugin * plugin)

  1682 {

  1683   static gchar *exts[] = { "nuv", NULL };    

  1684 #ifdef ENABLE_NLS

  1685   setlocale (LC_ALL, "");

  1686   bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);

  1687 #endif /* ENABLE_NLS */

  1688 

  1689   if (!gst_element_register (plugin, "nuvdemux", GST_RANK_SECONDARY,

  1690           GST_TYPE_NUV_DEMUX)) {

  1691     return FALSE;

  1692   }

  1693 

  1694   if (!gst_type_find_register (plugin, "video/x-nuv", GST_RANK_SECONDARY,

  1695               gst_nuv_typefind, 

  1696               exts,

  1697               gst_caps_new_simple ("video/x-nuv", NULL), NULL, NULL)) {

  1698     GST_WARNING ("can't register typefind");

  1699     return FALSE;

  1700   }

  1701 

  1702   return TRUE;

  1703 }

  1704 

  1705 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,

  1706     GST_VERSION_MINOR,

  1707     "nuvdemux",

  1708     "Demuxes and muxes audio and video",

  1709      plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)

  1710
gmyth