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gst-plugins-nuvdemux/nuvdemux/gstnuvdemux.c
author rosfran
Thu Nov 30 19:44:22 2006 +0000 (2006-11-30)
branchtrunk
changeset 153 a0e5b7d75f25
parent 146 07951674b0c0
child 156 4b24a328c655
permissions -rw-r--r--
[svn r154] Fixed memory leaks when sending duration (TIME and BYTES) queries to the sink pad (peer pad). 
     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 

   196   /* NUV decoding state */

   197   GstNuvDemuxState  state;

   198   GstSegment        segment;

   199   guint64           last_update;

   200   guint64           offset;

   201   guint64           streamer_offset;

   202 

   203   /* duration information */

   204   gint64            duration_bytes;

   205   gint64            duration_time;

   206   gint64            duration_average;

   207 

   208   /* segment control info */

   209   gboolean          new_audio_segment;

   210   gboolean          new_video_segment;

   211 

   212   /* Mpeg ExtraData */

   213   guint64       mpeg_data_size;

   214   GstBuffer     *mpeg_buffer;

   215 

   216   /* Headers */

   217   nuv_header *h;

   218   nuv_extended_header *eh;

   219   nuv_frame_header *fh;

   220 

   221   /* anothers info */

   222   gint64            time_start;

   223   gint64            time_diff;

   224   gint64            time_qos;

   225   guint64           last_frame_time;

   226 };

   227 

   228 

   229 static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",

   230     GST_PAD_SINK,

   231     GST_PAD_ALWAYS,

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

   233 

   234 static GstStaticPadTemplate audio_src_template =

   235 GST_STATIC_PAD_TEMPLATE ("audio_src",

   236     GST_PAD_SRC,

   237     GST_PAD_SOMETIMES,

   238     GST_STATIC_CAPS_ANY);

   239 

   240 static GstStaticPadTemplate video_src_template =

   241 GST_STATIC_PAD_TEMPLATE ("video_src",

   242     GST_PAD_SRC,

   243     GST_PAD_SOMETIMES,

   244     GST_STATIC_CAPS_ANY);

   245 

   246 static void gst_nuv_demux_dispose (GObject * object);

   247 static void gst_nuv_demux_finalize (GObject * object);

   248 static GstStateChangeReturn gst_nuv_demux_change_state (GstElement * element,

   249     GstStateChange transition);

   250 static void gst_nuv_demux_loop (GstPad * pad);

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

   252 static GstFlowReturn gst_nuv_demux_play (GstPad * pad);

   253 static gboolean gst_nuv_demux_sink_activate_pull (GstPad * sinkpad,

   254     gboolean active);

   255 static gboolean gst_nuv_demux_sink_activate_push (GstPad * pad,

   256     gboolean active);

   257 static gboolean gst_nuv_demux_sink_activate (GstPad * sinkpad);

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

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

   260     gboolean move, GstBuffer ** buffer);

   261 static void gst_nuv_demux_reset (GstNuvDemux * nuv);

   262 static void gst_nuv_demux_destoy_src_pad (GstNuvDemux * nuv);

   263 static void gst_nuv_demux_send_eos (GstNuvDemux * nuv);

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

   265 static gint64 gst_nuv_demux_get_bytes_duration (GstNuvDemux *nuv);

   266 static gint64 gst_nuv_demux_get_time_duration (GstNuvDemux *nuv);

   267 

   268 

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

   270 

   271 /******************************************************************************

   272  * Utils function

   273  ******************************************************************************/

   274 #if G_BYTE_ORDER == G_BIG_ENDIAN

   275 static inline gdouble

   276 _gdouble_swap_le_be (gdouble * d)

   277 {

   278   union

   279   {

   280     guint64 i;

   281     gdouble d;

   282   } u;

   283 

   284   u.d = *d;

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

   286   return u.d;

   287 }

   288 

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

   290 #else /* G_BYTE_ORDER != G_BIG_ENDIAN */

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

   292 #endif /* G_BYTE_ORDER != G_BIG_ENDIAN */

   293 

   294 static void

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

   296 {

   297     if (in == 29.97) {

   298         *num = 30000;

   299         *denom = 1001;

   300     } else if (in == 23.976) {

   301         *num = 24000;

   302         *denom = 1001;

   303     } else {

   304         *denom = 1;

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

   306             *denom *= 10;

   307             in *= 10.0;

   308         }

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

   310     }

   311 }

   312 

   313 /* GObject Functions */

   314 

   315 static void

   316 gst_nuv_demux_base_init (gpointer klass)

   317 {

   318   GstElementClass *element_class = GST_ELEMENT_CLASS (klass);

   319 

   320   gst_element_class_add_pad_template (element_class,

   321       gst_static_pad_template_get (&audio_src_template));

   322 

   323   gst_element_class_add_pad_template (element_class,

   324       gst_static_pad_template_get (&video_src_template));

   325 

   326   gst_element_class_add_pad_template (element_class,

   327       gst_static_pad_template_get (&sink_template));

   328   gst_element_class_set_details (element_class, &gst_nuv_demux_details);

   329 }

   330 

   331 static void

   332 gst_nuv_demux_class_init (GstNuvDemuxClass * klass)

   333 {

   334   GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);

   335   GObjectClass *gobject_class = (GObjectClass *) klass;

   336 

   337   GST_DEBUG_CATEGORY_INIT (nuvdemux_debug, "nuvdemux",

   338       0, "Demuxer for NUV streams");

   339 

   340   parent_class = g_type_class_peek_parent (klass);

   341 

   342   gobject_class->dispose = gst_nuv_demux_dispose;

   343   gobject_class->finalize = gst_nuv_demux_finalize;

   344   gstelement_class->change_state = gst_nuv_demux_change_state;

   345 

   346   g_type_class_add_private (gobject_class, sizeof (GstNuvDemuxPrivate));

   347 }

   348 

   349 static void

   350 gst_nuv_demux_init (GstNuvDemux * nuv, GstNuvDemuxClass * nuv_class)

   351 {

   352   nuv->priv = GST_NUV_DEMUX_GET_PRIVATE (nuv);

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

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

   355   gst_pad_set_activatepull_function (nuv->priv->sinkpad,

   356       gst_nuv_demux_sink_activate_pull);

   357   gst_pad_set_activatepush_function (nuv->priv->sinkpad,

   358       gst_nuv_demux_sink_activate_push);

   359   gst_pad_set_chain_function (nuv->priv->sinkpad,

   360       GST_DEBUG_FUNCPTR (gst_nuv_demux_chain));

   361   gst_pad_set_event_function (nuv->priv->sinkpad,

   362       gst_nuv_demux_sink_event);

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

   364 

   365   nuv->priv->new_audio_segment = TRUE;

   366   nuv->priv->new_video_segment = TRUE;

   367 

   368   /* creating adapter */

   369   nuv->priv->mode = NUV_PUSH_MODE;

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

   371 

   372   gst_nuv_demux_reset (nuv);

   373 }

   374 

   375 static void

   376 gst_nuv_demux_dispose (GObject * object)

   377 {

   378   GstNuvDemux *nuv = GST_NUV_DEMUX (object);

   379 

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

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

   382   }

   383 

   384   gst_nuv_demux_reset (GST_NUV_DEMUX (object));

   385   gst_nuv_demux_destoy_src_pad (GST_NUV_DEMUX (object));

   386 

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

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

   389   }

   390 }

   391 

   392 static void

   393 gst_nuv_demux_finalize (GObject * object)

   394 {

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

   396 }

   397 

   398 

   399 /* HeaderLoad:

   400  */

   401 static GstFlowReturn

   402 gst_nuv_demux_header_load (GstNuvDemux * nuv, nuv_header ** h_ret)

   403 {

   404   GstBuffer *buffer = NULL;

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

   406 

   407   if ((res != GST_FLOW_OK) || (buffer == NULL))

   408     return res;

   409 

   410   nuv_header *h = g_new0 (nuv_header, 1);

   411 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

   427 

   428   GST_DEBUG_OBJECT (nuv,

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

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

   431       h->i_video_blocks, h->i_audio_blocks, h->i_text_blocks,

   432       h->i_keyframe_distance);

   433 

   434   *h_ret = h;

   435   gst_buffer_unref (buffer);

   436   return res;

   437 }

   438 

   439 static GstFlowReturn

   440 gst_nuv_demux_stream_header_data (GstNuvDemux * nuv)

   441 {

   442   GstFlowReturn res;

   443 

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

   445   if (res == GST_FLOW_OK)

   446     nuv->priv->state = GST_NUV_DEMUX_EXTRA_DATA;

   447   return res;

   448 }

   449 

   450 /*

   451  * Read NUV file tag

   452  */

   453 static GstFlowReturn

   454 gst_nuv_demux_stream_file_header (GstNuvDemux * nuv)

   455 {

   456   GstFlowReturn res = GST_FLOW_OK;

   457   GstBuffer *file_header = NULL;

   458 

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

   460   if ((res != GST_FLOW_OK) || (file_header == NULL)) {

   461     return res;

   462   } else {

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

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

   465       nuv->priv->state = GST_NUV_DEMUX_HEADER_DATA;

   466     } else {

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

   468       nuv->priv->state = GST_NUV_DEMUX_INVALID_DATA;

   469       res = GST_FLOW_ERROR;

   470     }

   471   }

   472   if (file_header != NULL) {

   473     gst_buffer_unref (file_header);

   474   }

   475   return res;

   476 }

   477 

   478 /* FrameHeaderLoad:

   479  */

   480 static GstFlowReturn

   481 gst_nuv_demux_frame_header_load (GstNuvDemux * nuv, nuv_frame_header ** h_ret)

   482 {

   483   unsigned char *data;

   484   nuv_frame_header *h;

   485   GstBuffer *buf = NULL;

   486 

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

   488 

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

   490     if (buf != NULL) {

   491       gst_buffer_unref (buf);

   492     }

   493     return res;

   494   }

   495 

   496   h = g_new0 (nuv_frame_header, 1);

   497   data = buf->data;

   498 

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

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

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

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

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

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

   505 

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

   507       h->i_type,

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

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

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

   511 

   512   *h_ret = h;

   513   gst_buffer_unref (buf);

   514   return GST_FLOW_OK;

   515 }

   516 

   517 static GstFlowReturn

   518 gst_nuv_demux_extended_header_load (GstNuvDemux * nuv,

   519     nuv_extended_header ** h_ret)

   520 {

   521   unsigned char *data;

   522   GstBuffer *buff = NULL;

   523   nuv_extended_header *h;

   524 

   525 

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

   527 

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

   529     if (buff != NULL) {

   530       gst_buffer_unref (buff);

   531     }

   532     return res;

   533   }

   534 

   535   h = g_new0 (nuv_extended_header, 1);

   536   data = buff->data;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

   554 

   555   GST_DEBUG_OBJECT (nuv,

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

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

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

   559       h->i_audio_sample_rate, h->i_audio_bits_per_sample, h->i_audio_channels,

   560       h->i_audio_compression_ratio, h->i_audio_quality, h->i_rtjpeg_quality,

   561       h->i_rtjpeg_luma_filter, h->i_rtjpeg_chroma_filter, h->i_lavc_bitrate,

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

   563       h->i_keyframe_adjust_offset);

   564 

   565   *h_ret = h;

   566   gst_buffer_unref (buff);

   567   return res;

   568 }

   569 

   570 

   571 /* Query Functions */

   572 static const GstQueryType *

   573 gst_nuv_demux_get_src_query_types (GstPad * pad)

   574 {

   575   static const GstQueryType src_types[] = {

   576     GST_QUERY_POSITION,

   577     GST_QUERY_DURATION,

   578     0

   579   };

   580 

   581   return src_types;

   582 }

   583 

   584 static gboolean

   585 gst_nuv_demux_handle_src_query (GstPad * pad, GstQuery * query)

   586 {

   587   gboolean res = FALSE;

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

   589 

   590   switch (GST_QUERY_TYPE (query)) {

   591     case GST_QUERY_POSITION:

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

   593 

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

   595         res = TRUE;

   596       }

   597       break;

   598     case GST_QUERY_DURATION:

   599       {

   600         gint64 duration = 0;

   601         duration = gst_nuv_demux_get_time_duration (nuv);

   602         if (duration == GST_CLOCK_TIME_NONE) {

   603             duration = nuv->priv->duration_average;

   604         }

   605         if (duration != GST_CLOCK_TIME_NONE) {

   606             gst_query_set_duration (query, GST_FORMAT_TIME, duration);

   607             res = TRUE;

   608         }

   609       }

   610       break;

   611     default:

   612       res = FALSE;

   613       break;

   614   }

   615 

   616   gst_object_unref (nuv);

   617 

   618   return res;

   619 }

   620 

   621 static GstPad*

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

   623 {

   624     GstPad *pad = NULL;

   625     pad = gst_pad_new_from_static_template (template, name);

   626     gst_pad_set_caps (pad, caps);

   627     gst_pad_set_active (pad, TRUE);

   628     gst_pad_use_fixed_caps (pad);

   629     gst_element_add_pad (GST_ELEMENT (nuv), pad);

   630 

   631     return pad;

   632 }

   633 

   634 static void

   635 gst_nuv_demux_create_pads (GstNuvDemux * nuv)

   636 {

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

   638     GstCaps *video_caps = NULL;

   639 

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

   641         "divxversion", G_TYPE_INT, 4,

   642         "width", G_TYPE_INT, nuv->priv->h->i_width,

   643         "height", G_TYPE_INT, nuv->priv->h->i_height,

   644         "framerate", GST_TYPE_FRACTION, nuv->priv->h->i_fpsn, nuv->priv->h->i_fpsd,

   645         "format", GST_TYPE_FOURCC, nuv->priv->eh->i_video_fcc,

   646         "pixel-aspect-ratio", GST_TYPE_FRACTION,

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

   648 

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

   650     gst_caps_unref (video_caps);

   651   }

   652 

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

   654     GstCaps *audio_caps = NULL;

   655 

   656     audio_caps = gst_caps_new_simple ("audio/mpeg",

   657         "rate", G_TYPE_INT, nuv->priv->eh->i_audio_sample_rate,

   658         "format", GST_TYPE_FOURCC, nuv->priv->eh->i_audio_fcc,

   659         "channels", G_TYPE_INT, nuv->priv->eh->i_audio_channels,

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

   661 

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

   663     gst_caps_unref (audio_caps);

   664   }

   665 

   666   gst_element_no_more_pads (GST_ELEMENT (nuv));

   667 }

   668 

   669 static GstFlowReturn

   670 gst_nuv_demux_read_head_frame (GstNuvDemux * nuv)

   671 {

   672   GstFlowReturn ret = GST_FLOW_OK;

   673 

   674   if (nuv->priv->fh != NULL)

   675   {

   676     g_free (nuv->priv->fh);

   677     nuv->priv->fh = NULL;

   678   }

   679 

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

   681   if (ret != GST_FLOW_OK)

   682     return ret;

   683 

   684   nuv->priv->state = GST_NUV_DEMUX_MOVI;

   685   return ret;

   686 }

   687 

   688 static gboolean

   689 gst_nuv_combine_flow (GstNuvDemux *nuv)

   690 {

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

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

   693 

   694     if ((ret_video != GST_FLOW_OK) &&

   695         (ret_audio != GST_FLOW_OK))

   696         return FALSE;

   697 

   698     if (GST_FLOW_IS_FATAL (ret_video))

   699         return FALSE;

   700 

   701     if (GST_FLOW_IS_FATAL (ret_audio))

   702         return FALSE;

   703 

   704     return TRUE;

   705 }

   706 

   707 static GstFlowReturn

   708 gst_nuv_demux_stream_data (GstNuvDemux * nuv)

   709 {

   710   GstFlowReturn ret = GST_FLOW_OK;

   711   GstPad *pad = NULL;

   712   guint64 timestamp;

   713   GstBuffer *buf = NULL;

   714   nuv_frame_header *h = NULL;

   715 

   716   h = nuv->priv->fh;

   717 

   718   if (h->i_type == 'R')

   719     goto done;

   720 

   721   if (h->i_length > 0) {

   722 	  ret = gst_nuv_demux_read_bytes (nuv, h->i_length, TRUE, &buf);

   723 	  if ((ret != GST_FLOW_OK) || (buf == NULL))

   724 		  return ret;

   725 

   726       if (h->i_timecode < 0) {

   727           h->i_timecode = h->i_timecode * -1;

   728           nuv->priv->time_diff = h->i_timecode;

   729       }

   730       else

   731           h->i_timecode += nuv->priv->time_diff;

   732 

   733       timestamp = h->i_timecode * GST_MSECOND;

   734 

   735       GST_BUFFER_SIZE (buf) = h->i_length;

   736       GST_BUFFER_TIMESTAMP (buf) = timestamp;

   737   }

   738   else {

   739     goto done;

   740   }

   741 

   742 

   743   switch (h->i_type) {

   744     case 'V':

   745     {

   746       pad = nuv->priv->src_video_pad;

   747 

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

   749 

   750         /* send new segment event*/

   751         gst_pad_push_event (nuv->priv->src_video_pad,

   752           gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0,

   753                                      GST_CLOCK_TIME_NONE, 0));

   754 

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

   756             nuv->priv->time_start = timestamp;

   757         }

   758         nuv->priv->new_video_segment = FALSE;

   759       }

   760 

   761       break;

   762     }

   763     case 'A':

   764     {

   765       pad = nuv->priv->src_audio_pad;

   766 

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

   768         /* send new segment event*/

   769         gst_pad_push_event (nuv->priv->src_audio_pad,

   770           gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0,

   771                                      GST_CLOCK_TIME_NONE, 0));

   772 

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

   774             nuv->priv->time_start = timestamp;

   775         }

   776         nuv->priv->new_audio_segment = FALSE;

   777       }

   778 

   779       break;

   780     }

   781     case 'S':

   782     {

   783       switch (h->i_compression) {

   784         case 'V':

   785           GST_DEBUG_OBJECT (nuv, "sending new video segment: %d", h->i_timecode);

   786           gst_pad_push_event (nuv->priv->src_video_pad,

   787               gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, h->i_timecode * GST_MSECOND,

   788               		GST_CLOCK_TIME_NONE, 0));

   789           break;

   790         case 'A':

   791           GST_DEBUG_OBJECT (nuv, "sending new audio segment: %d", h->i_timecode);

   792           gst_pad_push_event (nuv->priv->src_audio_pad,

   793               gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0,

   794               		GST_CLOCK_TIME_NONE, 0));

   795           break;

   796         default:

   797           break;

   798       }

   799       if (buf != NULL)

   800         gst_buffer_unref (buf);

   801 

   802       goto done;

   803     }

   804     default:

   805       if (buf != NULL)

   806         gst_buffer_unref (buf);

   807 

   808       break;

   809   }

   810 

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

   812       /* update average time */

   813       nuv->priv->streamer_offset += h->i_length;

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

   815       gst_nuv_demux_update_duration (nuv, timestamp);

   816 

   817       /* pushing the buffer */

   818       gst_buffer_set_caps (buf, GST_PAD_CAPS (pad));

   819       ret = gst_pad_push (pad, buf);

   820 

   821       if (ret != GST_FLOW_OK) {

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

   823 

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

   825             nuv->priv->last_video_return = ret;

   826         }

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

   828             nuv->priv->last_audio_return = ret;

   829         }

   830 

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

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

   833             ret = GST_FLOW_OK;

   834         }

   835 

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

   837       }

   838   }

   839 

   840 done:

   841   nuv->priv->state = GST_NUV_DEMUX_FRAME_HEADER;

   842   g_free (nuv->priv->fh);

   843   nuv->priv->fh = NULL;

   844   return ret;

   845 }

   846 

   847 static GstFlowReturn

   848 gst_nuv_demux_stream_mpeg_data (GstNuvDemux * nuv)

   849 {

   850   GstFlowReturn ret = GST_FLOW_OK;

   851 

   852   /* ffmpeg extra data */

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

   854       &nuv->priv->mpeg_buffer);

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

   856     return ret;

   857   }

   858 

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

   860   nuv->priv->state = GST_NUV_DEMUX_EXTEND_HEADER;

   861   return ret;

   862 }

   863 

   864 static GstFlowReturn

   865 gst_nuv_demux_stream_extra_data (GstNuvDemux * nuv)

   866 {

   867   GstFlowReturn ret = GST_FLOW_OK;

   868 

   869   /* Load 'D' */

   870   nuv_frame_header *h;

   871 

   872   ret = gst_nuv_demux_frame_header_load (nuv, &h);

   873   if (ret != GST_FLOW_OK)

   874     return ret;

   875 

   876   if (h->i_type != 'D') {

   877     g_free (h);

   878     GST_WARNING_OBJECT (nuv, "Unsuported rtjpeg");

   879     return GST_FLOW_NOT_SUPPORTED;

   880   }

   881 

   882   if (h->i_length > 0) {

   883     if (h->i_compression == 'F') {

   884       nuv->priv->state = GST_NUV_DEMUX_MPEG_DATA;

   885     } else {

   886       g_free (h);

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

   888       return GST_FLOW_NOT_SUPPORTED;

   889     }

   890   } else {

   891     nuv->priv->state = GST_NUV_DEMUX_EXTEND_HEADER;

   892   }

   893 

   894   g_free (h);

   895   h = NULL;

   896   return ret;

   897 }

   898 

   899 static GstFlowReturn

   900 gst_nuv_demux_stream_extend_header_data (GstNuvDemux * nuv)

   901 {

   902   GstFlowReturn ret = GST_FLOW_OK;

   903 

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

   905   if (ret != GST_FLOW_OK)

   906     return ret;

   907 

   908   gst_nuv_demux_create_pads (nuv);

   909   nuv->priv->state = GST_NUV_DEMUX_FRAME_HEADER;

   910   return ret;

   911 }

   912 

   913 static GstFlowReturn

   914 gst_nuv_demux_stream_extend_header (GstNuvDemux * nuv)

   915 {

   916   GstBuffer *buf = NULL;

   917   GstFlowReturn res = GST_FLOW_OK;

   918 

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

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

   921     if (buf != NULL) {

   922       gst_buffer_unref (buf);

   923     }

   924     return res;

   925   }

   926 

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

   928     gst_buffer_unref (buf);

   929     buf = NULL;

   930     nuv_frame_header *h = NULL;

   931 

   932     res = gst_nuv_demux_frame_header_load (nuv, &h);

   933     if (res != GST_FLOW_OK)

   934       return res;

   935 

   936     if (h->i_length != 512) {

   937       g_free (h);

   938       return GST_FLOW_ERROR;

   939     }

   940     g_free (h);

   941     h = NULL;

   942     nuv->priv->state = GST_NUV_DEMUX_EXTEND_HEADER_DATA;

   943   } else {

   944     nuv->priv->state = GST_NUV_DEMUX_INVALID_DATA;

   945     g_object_unref (buf);

   946     GST_ELEMENT_WARNING (nuv, STREAM, FAILED,

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

   948     return GST_FLOW_ERROR;

   949   }

   950   return res;

   951 }

   952 

   953 static GstFlowReturn

   954 gst_nuv_demux_play (GstPad * pad)

   955 {

   956   GstFlowReturn res = GST_FLOW_OK;

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

   958 

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

   960     case GST_NUV_DEMUX_START:

   961       res = gst_nuv_demux_stream_file_header (nuv);

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

   963         goto pause;

   964       }

   965       break;

   966 

   967     case GST_NUV_DEMUX_HEADER_DATA:

   968       res = gst_nuv_demux_stream_header_data (nuv);

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

   970         goto pause;

   971       }

   972       break;

   973 

   974     case GST_NUV_DEMUX_EXTRA_DATA:

   975       res = gst_nuv_demux_stream_extra_data (nuv);

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

   977         goto pause;

   978       }

   979       break;

   980 

   981     case GST_NUV_DEMUX_MPEG_DATA:

   982       res = gst_nuv_demux_stream_mpeg_data (nuv);

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

   984         goto pause;

   985       }

   986       break;

   987 

   988     case GST_NUV_DEMUX_EXTEND_HEADER:

   989       res = gst_nuv_demux_stream_extend_header (nuv);

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

   991         goto pause;

   992       }

   993       break;

   994 

   995     case GST_NUV_DEMUX_EXTEND_HEADER_DATA:

   996       res = gst_nuv_demux_stream_extend_header_data (nuv);

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

   998         goto pause;

   999       }

  1000       break;

  1001 

  1002     case GST_NUV_DEMUX_FRAME_HEADER:

  1003       res = gst_nuv_demux_read_head_frame (nuv);

  1004       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

  1005         goto pause;

  1006       }

  1007       break;

  1008 

  1009     case GST_NUV_DEMUX_MOVI:

  1010       res = gst_nuv_demux_stream_data (nuv);

  1011       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

  1012         goto pause;

  1013       }

  1014       break;

  1015 

  1016     case GST_NUV_DEMUX_INVALID_DATA:

  1017       goto pause;

  1018       break;

  1019     default:

  1020       g_assert_not_reached ();

  1021   }

  1022 

  1023   GST_DEBUG_OBJECT (nuv, "state: %d res:%s", nuv->priv->state, gst_flow_get_name (res));

  1024 

  1025   return GST_FLOW_OK;

  1026 

  1027 pause:

  1028   GST_LOG_OBJECT (nuv, "pausing task, reason %s", gst_flow_get_name (res));

  1029   gst_pad_pause_task (nuv->priv->sinkpad);

  1030   if (GST_FLOW_IS_FATAL (res)) {

  1031     GST_ELEMENT_ERROR (nuv, STREAM, FAILED,

  1032         (_("Internal data stream error.")),

  1033         ("streaming stopped, reason %s", gst_flow_get_name (res)));

  1034 

  1035     gst_nuv_demux_send_eos (nuv);

  1036   }

  1037   return res;

  1038 }

  1039 

  1040 static void

  1041 gst_nuv_demux_send_eos (GstNuvDemux * nuv)

  1042 {

  1043   gst_element_post_message (GST_ELEMENT (nuv),

  1044       gst_message_new_segment_done (GST_OBJECT (nuv), GST_FORMAT_TIME, -1));

  1045 

  1046   if (nuv->priv->src_video_pad)

  1047     gst_pad_push_event (nuv->priv->src_video_pad, gst_event_new_eos ());

  1048   if (nuv->priv->src_audio_pad)

  1049     gst_pad_push_event (nuv->priv->src_audio_pad, gst_event_new_eos ());

  1050 }

  1051 

  1052 static GstFlowReturn

  1053 gst_nuv_demux_read_bytes (GstNuvDemux * nuv, guint64 size, gboolean move,

  1054     GstBuffer ** buffer)

  1055 {

  1056   GstFlowReturn ret = GST_FLOW_OK;

  1057 

  1058   if (size == 0) {

  1059     return ret;

  1060   }

  1061 

  1062   if (nuv->priv->mode == NUV_PULL_MODE) {

  1063     ret = gst_pad_pull_range (nuv->priv->sinkpad, nuv->priv->offset, size, buffer);

  1064     if (ret == GST_FLOW_OK) {

  1065         if (move) {

  1066 		    nuv->priv->offset += size;

  1067 		}

  1068       /* got eos */

  1069     } else if (ret == GST_FLOW_UNEXPECTED) {

  1070       if (buffer != NULL)

  1071           gst_buffer_unref (buffer);

  1072 

  1073       gst_nuv_demux_send_eos (nuv);

  1074       return GST_FLOW_WRONG_STATE;

  1075     }

  1076   } else {

  1077     if (gst_adapter_available (nuv->priv->adapter) < size)

  1078       return GST_FLOW_ERROR_NO_DATA;

  1079 

  1080     if (move) {

  1081       guint8 *data = (guint8 *) gst_adapter_take (nuv->priv->adapter, size);

  1082       *buffer = gst_buffer_new_and_alloc ( size );

  1083       gst_buffer_set_data (*buffer, data, size);

  1084     } else {

  1085       guint8 *data = (guint8 *) gst_adapter_peek (nuv->priv->adapter, size);

  1086       *buffer = gst_buffer_new_and_alloc ( size );

  1087       gst_buffer_set_data (*buffer, data, size);

  1088     }

  1089   }

  1090   return ret;

  1091 }

  1092 

  1093 static gboolean

  1094 gst_nuv_demux_sink_activate (GstPad * sinkpad)

  1095 {

  1096   gboolean res = TRUE;

  1097   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (sinkpad));

  1098 

  1099   if (gst_pad_check_pull_range (sinkpad)) {

  1100     res = gst_pad_activate_pull (sinkpad, TRUE);

  1101   } else {

  1102     res = gst_pad_activate_push (sinkpad, TRUE);

  1103   }

  1104   g_object_unref (nuv);

  1105   return res;

  1106 }

  1107 

  1108 static gboolean

  1109 gst_nuv_demux_sink_activate_pull (GstPad * sinkpad, gboolean active)

  1110 {

  1111   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (sinkpad));

  1112 

  1113   if (active) {

  1114     GST_DEBUG_OBJECT (nuv, "activating pull function");

  1115     nuv->priv->mode = NUV_PULL_MODE;

  1116     if (nuv->priv->adapter) {

  1117       gst_adapter_clear (nuv->priv->adapter);

  1118       g_object_unref (nuv->priv->adapter);

  1119       nuv->priv->adapter = NULL;

  1120     }

  1121     gst_pad_start_task (sinkpad, (GstTaskFunction) gst_nuv_demux_loop, sinkpad);

  1122   } else {

  1123     GST_DEBUG_OBJECT (nuv, "deactivating pull function");

  1124     gst_pad_stop_task (sinkpad);

  1125   }

  1126   gst_object_unref (nuv);

  1127 

  1128   return TRUE;

  1129 }

  1130 

  1131 static gboolean

  1132 gst_nuv_demux_sink_activate_push (GstPad * pad, gboolean active)

  1133 {

  1134   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

  1135 

  1136 

  1137   if (active) {

  1138     GST_DEBUG_OBJECT (nuv, "activating push/chain function");

  1139   } else {

  1140     GST_DEBUG_OBJECT (nuv, "deactivating push/chain function");

  1141   }

  1142 

  1143   gst_object_unref (nuv);

  1144 

  1145   return TRUE;

  1146 }

  1147 

  1148 

  1149 static gboolean

  1150 gst_nuv_demux_sink_event (GstPad *pad, GstEvent *event)

  1151 {

  1152   gboolean res;

  1153   GstNuvDemux *nuv;

  1154 

  1155   nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

  1156 

  1157   switch (GST_EVENT_TYPE (event)) {

  1158     case GST_EVENT_SEEK:

  1159     {

  1160       gdouble rate;

  1161       GstFormat format;

  1162       GstSeekFlags flags;

  1163       GstSeekType cur_type;

  1164       gint64 cur;

  1165       GstSeekType stop_type;

  1166       gint64 stop;

  1167 

  1168       gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &cur, &stop_type, &stop);

  1169 

  1170       GST_DEBUG_OBJECT (nuv, "got seek, start %" G_GINT64_FORMAT ", stop %" G_GINT64_FORMAT, cur, stop);

  1171 

  1172       break;

  1173     }

  1174     case GST_EVENT_NEWSEGMENT:

  1175     {

  1176       gint64 start, stop, time;

  1177       gdouble rate, arate;

  1178       GstFormat format;

  1179       gboolean update;

  1180 

  1181       GST_DEBUG_OBJECT (nuv, "got a new segment event");

  1182       gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,

  1183           &start, &stop, &time);

  1184 

  1185       GST_DEBUG_OBJECT (nuv, "got newsegment, start %" G_GINT64_FORMAT ", stop %" G_GINT64_FORMAT, start, stop);

  1186       nuv->priv->duration_bytes = stop - start;

  1187       gst_event_unref (event);

  1188       res = TRUE;

  1189       break;

  1190     }

  1191     case GST_EVENT_QOS:

  1192     {

  1193 /*

  1194       gdouble proportion;

  1195       GstClockTimeDiff diff;

  1196       GstClockTime timestamp;

  1197 

  1198       gst_event_parse_qos (event, &proportion, &diff, &timestamp);

  1199       if (diff > 0)

  1200         nuv->time_qos = timecode + diff;

  1201       else

  1202         nuv->time_qos = -1;

  1203 */

  1204 

  1205       break;

  1206     }

  1207 

  1208     case GST_EVENT_EOS:

  1209     default:

  1210       res = gst_pad_event_default (pad, event);

  1211       break;

  1212   }

  1213 

  1214   gst_object_unref (nuv);

  1215   return res;

  1216 }

  1217 

  1218 static GstFlowReturn

  1219 gst_nuv_demux_chain (GstPad * pad, GstBuffer * buf)

  1220 {

  1221   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

  1222 

  1223   GST_DEBUG_OBJECT (nuv, " gst_nuv_demux_chain function");

  1224   gst_adapter_push (nuv->priv->adapter, buf);

  1225 

  1226   gst_object_unref (nuv);

  1227 

  1228   return gst_nuv_demux_play (pad);

  1229 }

  1230 

  1231 static void

  1232 gst_nuv_demux_loop (GstPad * pad)

  1233 {

  1234   gst_nuv_demux_play (pad);

  1235 }

  1236 

  1237 static void

  1238 gst_nuv_demux_reset (GstNuvDemux * nuv)

  1239 {

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

  1255     gst_buffer_unref (nuv->priv->mpeg_buffer);

  1256     nuv->priv->mpeg_buffer = NULL;

  1257   }

  1258 

  1259   g_free (nuv->priv->h);

  1260   nuv->priv->h = NULL;

  1261 

  1262   g_free (nuv->priv->eh);

  1263   nuv->priv->eh = NULL;

  1264 

  1265   g_free (nuv->priv->fh);

  1266   nuv->priv->fh = NULL;

  1267 }

  1268 

  1269 static void

  1270 gst_nuv_demux_destoy_src_pad (GstNuvDemux * nuv)

  1271 {

  1272   if (nuv->priv->src_video_pad) {

  1273     gst_element_remove_pad (GST_ELEMENT (nuv), nuv->priv->src_video_pad);

  1274     nuv->priv->src_video_pad = NULL;

  1275   }

  1276 

  1277   if (nuv->priv->src_audio_pad) {

  1278     gst_element_remove_pad (GST_ELEMENT (nuv), nuv->priv->src_audio_pad);

  1279     nuv->priv->src_audio_pad = NULL;

  1280   }

  1281 }

  1282 

  1283 static GstStateChangeReturn

  1284 gst_nuv_demux_change_state (GstElement * element, GstStateChange transition)

  1285 {

  1286   GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;

  1287 

  1288   switch (transition) {

  1289     case GST_STATE_CHANGE_NULL_TO_READY:

  1290       gst_nuv_demux_reset (GST_NUV_DEMUX (element));

  1291       gst_nuv_demux_destoy_src_pad (GST_NUV_DEMUX (element));

  1292       break;

  1293     default:

  1294       break;

  1295   }

  1296 

  1297   ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);

  1298   if (ret == GST_STATE_CHANGE_FAILURE) {

  1299     goto done;

  1300   }

  1301 

  1302   switch (transition) {

  1303     case GST_STATE_CHANGE_READY_TO_NULL:

  1304       gst_nuv_demux_reset (GST_NUV_DEMUX (element));

  1305       gst_nuv_demux_destoy_src_pad (GST_NUV_DEMUX (element));

  1306       break;

  1307     default:

  1308       break;

  1309   }

  1310 

  1311 done:

  1312   return ret;

  1313 }

  1314 

  1315 static void

  1316 gst_nuv_demux_update_duration (GstNuvDemux *nuv, guint64 current_timestamp)

  1317 {

  1318     guint64 interval = 0;

  1319 

  1320     if (gst_nuv_demux_get_time_duration (nuv) != GST_CLOCK_TIME_NONE)

  1321         return;

  1322 

  1323     interval  = current_timestamp - nuv->priv->last_update;

  1324 

  1325     if (interval > (10 * GST_SECOND)) {

  1326         gint64 average = 0;

  1327         gint64 duration_bytes = gst_nuv_demux_get_bytes_duration (nuv);

  1328 

  1329         if (duration_bytes == GST_CLOCK_TIME_NONE)

  1330             return;

  1331 

  1332         if (current_timestamp > 0) {

  1333             interval = gst_util_uint64_scale (1, current_timestamp - nuv->priv->time_start, GST_SECOND);

  1334             if (interval > 0) {

  1335                 average = gst_util_uint64_scale (1 , nuv->priv->streamer_offset, interval);

  1336             }

  1337             if (average > 0) {

  1338                 nuv->priv->duration_average = gst_util_uint64_scale (GST_SECOND, duration_bytes, average);

  1339             }

  1340             nuv->priv->last_update = current_timestamp;

  1341             gst_element_post_message (GST_ELEMENT (nuv), 

  1342             		gst_message_new_duration (GST_OBJECT (nuv), GST_FORMAT_TIME, 

  1343             						nuv->priv->duration_average) );

  1344             GST_DEBUG_OBJECT (nuv, "New Duration Average %"G_GUINT64_FORMAT, nuv->priv->duration_average);

  1345         }

  1346     }

  1347 }

  1348 

  1349 static gint64

  1350 gst_nuv_demux_get_bytes_duration (GstNuvDemux *nuv)

  1351 {

  1352     if (nuv->priv->duration_bytes == GST_CLOCK_TIME_NONE) {

  1353         GstFormat format = GST_FORMAT_BYTES;

  1354         gint64 duration = 0;

  1355         if (gst_pad_query_peer_duration (nuv->priv->sinkpad, &format, &duration)) {            

  1356             nuv->priv->duration_bytes = duration;

  1357         }

  1358     }

  1359     return nuv->priv->duration_bytes;

  1360 }

  1361 

  1362 static gint64

  1363 gst_nuv_demux_get_time_duration (GstNuvDemux *nuv)

  1364 {

  1365     if (nuv->priv->duration_time == GST_CLOCK_TIME_NONE) {

  1366         GstFormat format = GST_FORMAT_TIME;

  1367         gint64 duration = 0;

  1368         if (gst_pad_query_peer_duration (nuv->priv->sinkpad, &format, &duration)) {            

  1369             nuv->priv->duration_time = duration;

  1370         }

  1371     }

  1372     return nuv->priv->duration_time;

  1373 }

  1374 

  1375 

  1376 static gboolean

  1377 plugin_init (GstPlugin * plugin)

  1378 {

  1379 #ifdef ENABLE_NLS

  1380   setlocale (LC_ALL, "");

  1381   bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);

  1382 #endif /* ENABLE_NLS */

  1383 

  1384   if (!gst_element_register (plugin, "nuvdemux", GST_RANK_SECONDARY,

  1385           GST_TYPE_NUV_DEMUX)) {

  1386     return FALSE;

  1387   }

  1388   return TRUE;

  1389 }

  1390 

  1391 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,

  1392     GST_VERSION_MINOR,

  1393     "nuvdemux",

  1394     "Demuxes and muxes audio and video",

  1395     plugin_init, VERSION, "LGPL", "NuvDemux", "")
gmyth