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gst-plugins-nuvdemux/nuvdemux/gstnuvdemux.c
author renatofilho
Fri Nov 17 13:18:48 2006 +0000 (2006-11-17)
branchtrunk
changeset 91 6b1e210c250a
parent 88 2a70ed80ed1a
child 92 e594fc21deef
permissions -rw-r--r--
[svn r92] code review 
     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   gst_nuv_demux_reset (nuv);

   369 }

   370 

   371 static void

   372 gst_nuv_demux_dispose (GObject * object)

   373 {

   374   GstNuvDemux *nuv = GST_NUV_DEMUX (object);

   375 

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

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

   378   }

   379 

   380   gst_nuv_demux_reset (GST_NUV_DEMUX (object));

   381   gst_nuv_demux_destoy_src_pad (GST_NUV_DEMUX (object));

   382 

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

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

   385   }

   386 }

   387 

   388 static void

   389 gst_nuv_demux_finalize (GObject * object)

   390 {

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

   392 }

   393 

   394 

   395 /* HeaderLoad:

   396  */

   397 static GstFlowReturn

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

   399 {

   400   GstBuffer *buffer = NULL;

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

   402 

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

   404     return res;

   405 

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

   407 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

   423 

   424   GST_DEBUG_OBJECT (nuv,

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

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

   427       h->i_video_blocks, h->i_audio_blocks, h->i_text_blocks,

   428       h->i_keyframe_distance);

   429 

   430   *h_ret = h;

   431   gst_buffer_unref (buffer);

   432   return res;

   433 }

   434 

   435 static GstFlowReturn

   436 gst_nuv_demux_stream_header_data (GstNuvDemux * nuv)

   437 {

   438   GstFlowReturn res;

   439 

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

   441   if (res == GST_FLOW_OK)

   442     nuv->priv->state = GST_NUV_DEMUX_EXTRA_DATA;

   443   return res;

   444 }

   445 

   446 /*

   447  * Read NUV file tag

   448  */

   449 static GstFlowReturn

   450 gst_nuv_demux_stream_file_header (GstNuvDemux * nuv)

   451 {

   452   GstFlowReturn res = GST_FLOW_OK;

   453   GstBuffer *file_header = NULL;

   454 

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

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

   457     return res;

   458   } else {

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

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

   461       nuv->priv->state = GST_NUV_DEMUX_HEADER_DATA;

   462     } else {

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

   464       nuv->priv->state = GST_NUV_DEMUX_INVALID_DATA;

   465       res = GST_FLOW_ERROR;

   466     }

   467   }

   468   if (file_header != NULL) {

   469     gst_buffer_unref (file_header);

   470   }

   471   return res;

   472 }

   473 

   474 /* FrameHeaderLoad:

   475  */

   476 static GstFlowReturn

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

   478 {

   479   unsigned char *data;

   480   nuv_frame_header *h;

   481   GstBuffer *buf = NULL;

   482 

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

   484 

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

   486     if (buf != NULL) {

   487       gst_buffer_unref (buf);

   488     }

   489     return res;

   490   }

   491 

   492   h = g_new0 (nuv_frame_header, 1);

   493   data = buf->data;

   494 

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

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

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

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

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

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

   501 

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

   503       h->i_type,

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

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

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

   507 

   508   *h_ret = h;

   509   gst_buffer_unref (buf);

   510   return GST_FLOW_OK;

   511 }

   512 

   513 static GstFlowReturn

   514 gst_nuv_demux_extended_header_load (GstNuvDemux * nuv,

   515     nuv_extended_header ** h_ret)

   516 {

   517   unsigned char *data;

   518   GstBuffer *buff = NULL;

   519   nuv_extended_header *h;

   520 

   521 

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

   523 

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

   525     if (buff != NULL) {

   526       gst_buffer_unref (buff);

   527     }

   528     return res;

   529   }

   530 

   531   h = g_new0 (nuv_extended_header, 1);

   532   data = buff->data;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

   550 

   551   GST_DEBUG_OBJECT (nuv,

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

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

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

   555       h->i_audio_sample_rate, h->i_audio_bits_per_sample, h->i_audio_channels,

   556       h->i_audio_compression_ratio, h->i_audio_quality, h->i_rtjpeg_quality,

   557       h->i_rtjpeg_luma_filter, h->i_rtjpeg_chroma_filter, h->i_lavc_bitrate,

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

   559       h->i_keyframe_adjust_offset);

   560 

   561   *h_ret = h;

   562   gst_buffer_unref (buff);

   563   return res;

   564 }

   565 

   566 

   567 /* Query Functions */

   568 static const GstQueryType *

   569 gst_nuv_demux_get_src_query_types (GstPad * pad)

   570 {

   571   static const GstQueryType src_types[] = {

   572     GST_QUERY_POSITION,

   573     GST_QUERY_DURATION,

   574     0

   575   };

   576 

   577   return src_types;

   578 }

   579 

   580 static gboolean

   581 gst_nuv_demux_handle_src_query (GstPad * pad, GstQuery * query)

   582 {

   583   gboolean res = FALSE;

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

   585 

   586   switch (GST_QUERY_TYPE (query)) {

   587     case GST_QUERY_POSITION:

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

   589 

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

   591         res = TRUE;

   592       }

   593       break;

   594     case GST_QUERY_DURATION:

   595       {

   596         gint64 duration = 0;

   597         duration = gst_nuv_demux_get_time_duration (nuv);

   598         if (duration == GST_CLOCK_TIME_NONE) {

   599             duration = nuv->priv->duration_average;

   600         }

   601         if (duration != GST_CLOCK_TIME_NONE) {

   602             gst_query_set_duration (query, GST_FORMAT_TIME, duration);

   603             res = TRUE;

   604         }

   605       }

   606       break;

   607     default:

   608       res = FALSE;

   609       break;

   610   }

   611 

   612   gst_object_unref (nuv);

   613 

   614   return res;

   615 }

   616 

   617 static GstPad*

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

   619 {

   620     GstPad *pad = NULL;

   621     pad = gst_pad_new_from_static_template (template, name);

   622     gst_pad_use_fixed_caps (pad);

   623     gst_pad_set_caps (pad, caps);

   624     gst_pad_set_active (pad, TRUE);

   625     gst_element_add_pad (GST_ELEMENT (nuv), pad);

   626 

   627     return pad;

   628 }

   629 

   630 static void

   631 gst_nuv_demux_create_pads (GstNuvDemux * nuv)

   632 {

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

   634     GstCaps *video_caps = NULL;

   635 

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

   637         "divxversion", G_TYPE_INT, 4,

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

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

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

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

   642         "pixel-aspect-ratio", GST_TYPE_FRACTION,

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

   644 

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

   646     gst_caps_unref (video_caps);

   647   }

   648 

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

   650     GstCaps *audio_caps = NULL;

   651 

   652     audio_caps = gst_caps_new_simple ("audio/mpeg",

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

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

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

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

   657 

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

   659     gst_caps_unref (audio_caps);

   660   }

   661 

   662   gst_element_no_more_pads (GST_ELEMENT (nuv));

   663 }

   664 

   665 static GstFlowReturn

   666 gst_nuv_demux_read_head_frame (GstNuvDemux * nuv)

   667 {

   668   GstFlowReturn ret = GST_FLOW_OK;

   669 

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

   671   {

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

   673     nuv->priv->fh = NULL;

   674   }

   675 

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

   677   if (ret != GST_FLOW_OK)

   678     return ret;

   679 

   680   nuv->priv->state = GST_NUV_DEMUX_MOVI;

   681   return ret;

   682 }

   683 

   684 static gboolean

   685 gst_nuv_combine_flow (GstNuvDemux *nuv)

   686 {

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

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

   689 

   690     if ((ret_video != GST_FLOW_OK) &&

   691         (ret_audio != GST_FLOW_OK))

   692         return FALSE;

   693 

   694     if (GST_FLOW_IS_FATAL (ret_video))

   695         return FALSE;

   696 

   697     if (GST_FLOW_IS_FATAL (ret_audio))

   698         return FALSE;

   699 

   700     return TRUE;

   701 }

   702 

   703 static GstFlowReturn

   704 gst_nuv_demux_stream_data (GstNuvDemux * nuv)

   705 {

   706   GstFlowReturn ret = GST_FLOW_OK;

   707   GstPad *pad = NULL;

   708   guint64 timestamp;

   709   GstBuffer *buf = NULL;

   710   nuv_frame_header *h = NULL;

   711 

   712   h = nuv->priv->fh;

   713 

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

   715     goto done;

   716 

   717   if (h->i_length > 0) {

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

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

   720 		  return ret;

   721 

   722       if (h->i_timecode < 0) {

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

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

   725       }

   726       else

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

   728 

   729       timestamp = h->i_timecode * GST_MSECOND;

   730 

   731       GST_BUFFER_SIZE (buf) = h->i_length;

   732       GST_BUFFER_TIMESTAMP (buf) = timestamp;

   733 

   734       if ((h->i_type == 'V') || (h->i_type == 'A')) {

   735       }

   736   }

   737   else {

   738     goto done;

   739   }

   740 

   741 

   742   switch (h->i_type) {

   743     case 'V':

   744     {

   745       pad = nuv->priv->src_video_pad;

   746 

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

   748         /* send new segment event*/

   749         gst_pad_push_event (nuv->priv->src_video_pad,

   750           gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0,

   751                                      GST_CLOCK_TIME_NONE, 0));

   752 

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

   754             nuv->priv->time_start = timestamp;

   755         }

   756         nuv->priv->new_video_segment = FALSE;

   757       }

   758 

   759       break;

   760     }

   761     case 'A':

   762     {

   763       pad = nuv->priv->src_audio_pad;

   764 

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

   766         /* send new segment event*/

   767         gst_pad_push_event (nuv->priv->src_audio_pad,

   768           gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0,

   769                                      GST_CLOCK_TIME_NONE, 0));

   770 

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

   772             nuv->priv->time_start = timestamp;

   773         }

   774         nuv->priv->new_audio_segment = FALSE;

   775       }

   776 

   777       break;

   778     }

   779     case 'S':

   780     {

   781       switch (h->i_compression) {

   782         case 'V':

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

   784           gst_pad_push_event (nuv->priv->src_video_pad,

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

   786               		GST_CLOCK_TIME_NONE, 0));

   787           break;

   788         case 'A':

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

   790           gst_pad_push_event (nuv->priv->src_audio_pad,

   791               gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0,

   792               		GST_CLOCK_TIME_NONE, 0));

   793           break;

   794         default:

   795           break;

   796       }

   797       if (buf != NULL)

   798         gst_buffer_unref (buf);

   799 

   800       goto done;

   801     }

   802     default:

   803       if (buf != NULL)

   804         gst_buffer_unref (buf);

   805 

   806       break;

   807   }

   808 

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

   810       /* update average time */

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

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

   813       gst_nuv_demux_update_duration (nuv, timestamp);

   814 

   815       /* pushing the buffer */

   816       gst_buffer_set_caps (buf, GST_PAD_CAPS (pad));

   817       ret = gst_pad_push (pad, buf);

   818 

   819       if (ret != GST_FLOW_OK) {

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

   821             nuv->priv->last_video_return = ret;

   822         }

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

   824             nuv->priv->last_audio_return = ret;

   825         }

   826 

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

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

   829             ret = GST_FLOW_OK;

   830         }

   831 

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

   833       }

   834   }

   835 

   836 done:

   837   nuv->priv->state = GST_NUV_DEMUX_FRAME_HEADER;

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

   839   nuv->priv->fh = NULL;

   840   return ret;

   841 }

   842 

   843 static GstFlowReturn

   844 gst_nuv_demux_stream_mpeg_data (GstNuvDemux * nuv)

   845 {

   846   GstFlowReturn ret = GST_FLOW_OK;

   847 

   848   /* ffmpeg extra data */

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

   850       &nuv->priv->mpeg_buffer);

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

   852     return ret;

   853   }

   854 

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

   856   nuv->priv->state = GST_NUV_DEMUX_EXTEND_HEADER;

   857   return ret;

   858 }

   859 

   860 static GstFlowReturn

   861 gst_nuv_demux_stream_extra_data (GstNuvDemux * nuv)

   862 {

   863   GstFlowReturn ret = GST_FLOW_OK;

   864 

   865   /* Load 'D' */

   866   nuv_frame_header *h;

   867 

   868   ret = gst_nuv_demux_frame_header_load (nuv, &h);

   869   if (ret != GST_FLOW_OK)

   870     return ret;

   871 

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

   873     g_free (h);

   874     return GST_FLOW_ERROR;

   875   }

   876 

   877   if (h->i_length > 0) {

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

   879       nuv->priv->state = GST_NUV_DEMUX_MPEG_DATA;

   880     } else {

   881       g_free (h);

   882       return GST_FLOW_ERROR;

   883     }

   884   } else {

   885     nuv->priv->state = GST_NUV_DEMUX_EXTEND_HEADER;

   886   }

   887 

   888   g_free (h);

   889   h = NULL;

   890   return ret;

   891 }

   892 

   893 static GstFlowReturn

   894 gst_nuv_demux_stream_extend_header_data (GstNuvDemux * nuv)

   895 {

   896   GstFlowReturn ret = GST_FLOW_OK;

   897 

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

   899   if (ret != GST_FLOW_OK)

   900     return ret;

   901 

   902   gst_nuv_demux_create_pads (nuv);

   903   nuv->priv->state = GST_NUV_DEMUX_FRAME_HEADER;

   904   return ret;

   905 }

   906 

   907 static GstFlowReturn

   908 gst_nuv_demux_stream_extend_header (GstNuvDemux * nuv)

   909 {

   910   GstBuffer *buf = NULL;

   911   GstFlowReturn res = GST_FLOW_OK;

   912 

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

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

   915     if (buf != NULL) {

   916       gst_buffer_unref (buf);

   917     }

   918     return res;

   919   }

   920 

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

   922     gst_buffer_unref (buf);

   923     buf = NULL;

   924     nuv_frame_header *h = NULL;

   925 

   926     res = gst_nuv_demux_frame_header_load (nuv, &h);

   927     if (res != GST_FLOW_OK)

   928       return res;

   929 

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

   931       g_free (h);

   932       return GST_FLOW_ERROR;

   933     }

   934     g_free (h);

   935     h = NULL;

   936     nuv->priv->state = GST_NUV_DEMUX_EXTEND_HEADER_DATA;

   937   } else {

   938     nuv->priv->state = GST_NUV_DEMUX_INVALID_DATA;

   939     g_object_unref (buf);

   940     GST_ELEMENT_WARNING (nuv, STREAM, FAILED,

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

   942     return GST_FLOW_ERROR;

   943   }

   944   return res;

   945 }

   946 

   947 static GstFlowReturn

   948 gst_nuv_demux_play (GstPad * pad)

   949 {

   950   GstFlowReturn res = GST_FLOW_OK;

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

   952 

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

   954     case GST_NUV_DEMUX_START:

   955       res = gst_nuv_demux_stream_file_header (nuv);

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

   957         goto pause;

   958       }

   959       if (nuv->priv->state != GST_NUV_DEMUX_HEADER_DATA)

   960         break;

   961 

   962     case GST_NUV_DEMUX_HEADER_DATA:

   963       res = gst_nuv_demux_stream_header_data (nuv);

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

   965         goto pause;

   966       }

   967       if (nuv->priv->state != GST_NUV_DEMUX_EXTRA_DATA)

   968         break;

   969 

   970     case GST_NUV_DEMUX_EXTRA_DATA:

   971       res = gst_nuv_demux_stream_extra_data (nuv);

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

   973         goto pause;

   974       }

   975       if (nuv->priv->state != GST_NUV_DEMUX_MPEG_DATA)

   976         break;

   977 

   978     case GST_NUV_DEMUX_MPEG_DATA:

   979       res = gst_nuv_demux_stream_mpeg_data (nuv);

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

   981         goto pause;

   982       }

   983 

   984       if (nuv->priv->state != GST_NUV_DEMUX_EXTEND_HEADER)

   985         break;

   986 

   987     case GST_NUV_DEMUX_EXTEND_HEADER:

   988       res = gst_nuv_demux_stream_extend_header (nuv);

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

   990         goto pause;

   991       }

   992       if (nuv->priv->state != GST_NUV_DEMUX_EXTEND_HEADER_DATA)

   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 

  1001       if (nuv->priv->state != GST_NUV_DEMUX_FRAME_HEADER)

  1002         break;

  1003 

  1004     case GST_NUV_DEMUX_FRAME_HEADER:

  1005       res = gst_nuv_demux_read_head_frame (nuv);

  1006       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

  1007         goto pause;

  1008       }

  1009       if (nuv->priv->state != GST_NUV_DEMUX_MOVI)

  1010         break;

  1011 

  1012     case GST_NUV_DEMUX_MOVI:

  1013       res = gst_nuv_demux_stream_data (nuv);

  1014       if ((res != GST_FLOW_OK) && (res != GST_FLOW_ERROR_NO_DATA)) {

  1015         goto pause;

  1016       }

  1017       break;

  1018     case GST_NUV_DEMUX_INVALID_DATA:

  1019       goto pause;

  1020       break;

  1021     default:

  1022       g_assert_not_reached ();

  1023   }

  1024 

  1025   GST_DEBUG_OBJECT (nuv, "state: %d res:%s", nuv->priv->state, gst_flow_get_name (res));

  1026 

  1027   return GST_FLOW_OK;

  1028 

  1029 pause:

  1030   GST_LOG_OBJECT (nuv, "pausing task, reason %s", gst_flow_get_name (res));

  1031   gst_pad_pause_task (nuv->priv->sinkpad);

  1032   if (GST_FLOW_IS_FATAL (res)) {

  1033     GST_ELEMENT_ERROR (nuv, STREAM, FAILED,

  1034         (_("Internal data stream error.")),

  1035         ("streaming stopped, reason %s", gst_flow_get_name (res)));

  1036 

  1037     gst_nuv_demux_send_eos (nuv);

  1038   }

  1039   return res;

  1040 }

  1041 

  1042 static void

  1043 gst_nuv_demux_send_eos (GstNuvDemux * nuv)

  1044 {

  1045   gst_element_post_message (GST_ELEMENT (nuv),

  1046       gst_message_new_segment_done (GST_OBJECT (nuv), GST_FORMAT_TIME, -1));

  1047 

  1048   if (nuv->priv->src_video_pad)

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

  1050   if (nuv->priv->src_audio_pad)

  1051     gst_pad_push_event (nuv->priv->src_audio_pad, gst_event_new_eos ());

  1052 }

  1053 

  1054 static GstFlowReturn

  1055 gst_nuv_demux_read_bytes (GstNuvDemux * nuv, guint64 size, gboolean move,

  1056     GstBuffer ** buffer)

  1057 {

  1058   GstFlowReturn ret = GST_FLOW_OK;

  1059 

  1060   if (size == 0) {

  1061     return ret;

  1062   }

  1063 

  1064   if (nuv->priv->mode == NUV_PULL_MODE) {

  1065     ret = gst_pad_pull_range (nuv->priv->sinkpad, nuv->priv->offset, size, buffer);

  1066     if (ret == GST_FLOW_OK) {

  1067         if (move) {

  1068 		    nuv->priv->offset += size;

  1069 		}

  1070       /* got eos */

  1071     } else if (ret == GST_FLOW_UNEXPECTED) {

  1072       if (buffer != NULL)

  1073           gst_buffer_unref (buffer);

  1074 

  1075       gst_nuv_demux_send_eos (nuv);

  1076       return GST_FLOW_WRONG_STATE;

  1077     }

  1078   } else {

  1079     if (gst_adapter_available (nuv->priv->adapter) < size)

  1080       return GST_FLOW_ERROR_NO_DATA;

  1081 

  1082     if (move) {

  1083       guint8 *data = NULL;

  1084       data = (guint8 *) gst_adapter_take (nuv->priv->adapter, size);

  1085       *buffer = gst_buffer_new ();

  1086       gst_buffer_set_data (*buffer, data, size);

  1087     } else {

  1088       guint8 *data = NULL;

  1089       data = (guint8 *) gst_adapter_peek (nuv->priv->adapter, size);

  1090       *buffer = gst_buffer_new ();

  1091       gst_buffer_set_data (*buffer, data, size);

  1092     }

  1093   }

  1094   return ret;

  1095 }

  1096 

  1097 static gboolean

  1098 gst_nuv_demux_sink_activate (GstPad * sinkpad)

  1099 {

  1100   gboolean res = TRUE;

  1101   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (sinkpad));

  1102 

  1103   if (gst_pad_check_pull_range (sinkpad)) {

  1104     res = gst_pad_activate_pull (sinkpad, TRUE);

  1105   } else {

  1106     res = gst_pad_activate_push (sinkpad, TRUE);

  1107   }

  1108   g_object_unref (nuv);

  1109   return res;

  1110 }

  1111 

  1112 static gboolean

  1113 gst_nuv_demux_sink_activate_pull (GstPad * sinkpad, gboolean active)

  1114 {

  1115   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (sinkpad));

  1116 

  1117   if (active) {

  1118     GST_DEBUG_OBJECT (nuv, "activating pull function");

  1119     nuv->priv->mode = NUV_PULL_MODE;

  1120     if (nuv->priv->adapter) {

  1121       gst_adapter_clear (nuv->priv->adapter);

  1122       g_object_unref (nuv->priv->adapter);

  1123       nuv->priv->adapter = NULL;

  1124     }

  1125     gst_pad_start_task (sinkpad, (GstTaskFunction) gst_nuv_demux_loop, sinkpad);

  1126   } else {

  1127     GST_DEBUG_OBJECT (nuv, "deactivating pull function");

  1128     gst_pad_stop_task (sinkpad);

  1129   }

  1130   gst_object_unref (nuv);

  1131 

  1132   return TRUE;

  1133 }

  1134 

  1135 static gboolean

  1136 gst_nuv_demux_sink_activate_push (GstPad * pad, gboolean active)

  1137 {

  1138   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

  1139 

  1140   if (active) {

  1141     nuv->priv->mode = NUV_PUSH_MODE;

  1142     if (nuv->priv->adapter) {

  1143       gst_adapter_clear (nuv->priv->adapter);

  1144     } else {

  1145       nuv->priv->adapter = gst_adapter_new ();

  1146     }

  1147     GST_DEBUG_OBJECT (nuv, "activating push/chain function");

  1148   } else {

  1149     GST_DEBUG_OBJECT (nuv, "deactivating push/chain function");

  1150   }

  1151 

  1152   gst_object_unref (nuv);

  1153 

  1154   return TRUE;

  1155 }

  1156 

  1157 

  1158 static gboolean

  1159 gst_nuv_demux_sink_event (GstPad *pad, GstEvent *event)

  1160 {

  1161   gboolean res;

  1162   GstNuvDemux *nuv;

  1163 

  1164   nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

  1165 

  1166   switch (GST_EVENT_TYPE (event)) {

  1167     case GST_EVENT_SEEK:

  1168     {

  1169       gdouble rate;

  1170       GstFormat format;

  1171       GstSeekFlags flags;

  1172       GstSeekType cur_type;

  1173       gint64 cur;

  1174       GstSeekType stop_type;

  1175       gint64 stop;

  1176 

  1177       gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &cur, &stop_type, &stop);

  1178 

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

  1180 

  1181       break;

  1182     }

  1183     case GST_EVENT_NEWSEGMENT:

  1184     {

  1185       gint64 start, stop, time;

  1186       gdouble rate, arate;

  1187       GstFormat format;

  1188       gboolean update;

  1189 

  1190       GST_DEBUG_OBJECT (nuv, "got a new segment event");

  1191       gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,

  1192           &start, &stop, &time);

  1193 

  1194       GST_DEBUG_OBJECT (nuv, "got newsegment, start %" G_GINT64_FORMAT ", stop %" G_GINT64_FORMAT, start, stop);

  1195       g_debug ("got newsegment, start %" G_GINT64_FORMAT ", stop %" G_GINT64_FORMAT, start, stop);

  1196       nuv->priv->duration_bytes = stop - start;

  1197       gst_event_unref (event);

  1198       res = TRUE;

  1199       break;

  1200     }

  1201     case GST_EVENT_QOS:

  1202     {

  1203 /*

  1204       gdouble proportion;

  1205       GstClockTimeDiff diff;

  1206       GstClockTime timestamp;

  1207 

  1208       gst_event_parse_qos (event, &proportion, &diff, &timestamp);

  1209       if (diff > 0)

  1210         nuv->time_qos = timecode + diff;

  1211       else

  1212         nuv->time_qos = -1;

  1213 */

  1214 

  1215       break;

  1216     }

  1217 

  1218     case GST_EVENT_EOS:

  1219     default:

  1220       res = gst_pad_event_default (pad, event);

  1221       break;

  1222   }

  1223 

  1224   gst_object_unref (nuv);

  1225   return res;

  1226 }

  1227 

  1228 static GstFlowReturn

  1229 gst_nuv_demux_chain (GstPad * pad, GstBuffer * buf)

  1230 {

  1231   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

  1232 

  1233   GST_DEBUG_OBJECT (nuv, " gst_nuv_demux_chain function");

  1234   gst_adapter_push (nuv->priv->adapter, buf);

  1235 

  1236   gst_object_unref (nuv);

  1237 

  1238   return gst_nuv_demux_play (pad);

  1239 }

  1240 

  1241 static void

  1242 gst_nuv_demux_loop (GstPad * pad)

  1243 {

  1244   gst_nuv_demux_play (pad);

  1245 }

  1246 

  1247 static void

  1248 gst_nuv_demux_reset (GstNuvDemux * nuv)

  1249 {

  1250   nuv->priv->state = GST_NUV_DEMUX_START;

  1251   nuv->priv->mode = 0;

  1252   nuv->priv->offset = 0;

  1253   nuv->priv->streamer_offset = 0;

  1254   nuv->priv->time_start = 0;

  1255   nuv->priv->time_qos = GST_CLOCK_TIME_NONE;

  1256   nuv->priv->duration_bytes = GST_CLOCK_TIME_NONE;

  1257   nuv->priv->duration_time = GST_CLOCK_TIME_NONE;

  1258   nuv->priv->duration_average = GST_CLOCK_TIME_NONE;

  1259   gst_segment_init (&nuv->priv->segment, GST_FORMAT_TIME);

  1260 

  1261   if (nuv->priv->adapter != NULL)

  1262     gst_adapter_clear (nuv->priv->adapter);

  1263 

  1264   if (nuv->priv->mpeg_buffer != NULL) {

  1265     gst_buffer_unref (nuv->priv->mpeg_buffer);

  1266     nuv->priv->mpeg_buffer = NULL;

  1267   }

  1268 

  1269   g_free (nuv->priv->h);

  1270   nuv->priv->h = NULL;

  1271 

  1272   g_free (nuv->priv->eh);

  1273   nuv->priv->eh = NULL;

  1274 

  1275   g_free (nuv->priv->fh);

  1276   nuv->priv->fh = NULL;

  1277 }

  1278 

  1279 static void

  1280 gst_nuv_demux_destoy_src_pad (GstNuvDemux * nuv)

  1281 {

  1282   if (nuv->priv->src_video_pad) {

  1283     gst_element_remove_pad (GST_ELEMENT (nuv), nuv->priv->src_video_pad);

  1284     nuv->priv->src_video_pad = NULL;

  1285   }

  1286 

  1287   if (nuv->priv->src_audio_pad) {

  1288     gst_element_remove_pad (GST_ELEMENT (nuv), nuv->priv->src_audio_pad);

  1289     nuv->priv->src_audio_pad = NULL;

  1290   }

  1291 }

  1292 

  1293 static GstStateChangeReturn

  1294 gst_nuv_demux_change_state (GstElement * element, GstStateChange transition)

  1295 {

  1296   GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;

  1297 

  1298   switch (transition) {

  1299     case GST_STATE_CHANGE_READY_TO_PAUSED:

  1300       gst_nuv_demux_reset (GST_NUV_DEMUX (element));

  1301       break;

  1302     default:

  1303       break;

  1304   }

  1305 

  1306   ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);

  1307   if (ret == GST_STATE_CHANGE_FAILURE)

  1308     goto done;

  1309 

  1310   switch (transition) {

  1311     case GST_STATE_CHANGE_READY_TO_NULL:

  1312       gst_nuv_demux_reset (GST_NUV_DEMUX (element));

  1313       gst_nuv_demux_destoy_src_pad (GST_NUV_DEMUX (element));

  1314       break;

  1315     default:

  1316       break;

  1317   }

  1318 

  1319 done:

  1320   return ret;

  1321 }

  1322 

  1323 static void

  1324 gst_nuv_demux_update_duration (GstNuvDemux *nuv, guint64 current_timestamp)

  1325 {

  1326     guint64 interval = 0;

  1327 

  1328     if (gst_nuv_demux_get_time_duration (nuv) != GST_CLOCK_TIME_NONE)

  1329         return;

  1330 

  1331     interval  = current_timestamp - nuv->priv->last_update;

  1332 

  1333     if (interval > (10 * GST_SECOND)) {

  1334         GstMessage* msg = NULL;

  1335         gint64 average = 0;

  1336         gint64 duration_bytes = gst_nuv_demux_get_bytes_duration (nuv);

  1337 

  1338         if (duration_bytes == GST_CLOCK_TIME_NONE)

  1339             return;

  1340 

  1341         interval = gst_util_uint64_scale (1, current_timestamp - nuv->priv->time_start, GST_SECOND);

  1342         average = gst_util_uint64_scale (1 , nuv->priv->streamer_offset, interval);

  1343         nuv->priv->duration_average = gst_util_uint64_scale (GST_SECOND, duration_bytes, average);

  1344         nuv->priv->last_update = current_timestamp;

  1345         msg = gst_message_new_duration (GST_OBJECT (nuv), GST_FORMAT_TIME, nuv->priv->duration_average);

  1346         gst_element_post_message (GST_ELEMENT (nuv), msg);

  1347         GST_DEBUG_OBJECT (nuv, "New Duration Average %"G_GUINT64_FORMAT, nuv->priv->duration_average);

  1348     }

  1349 }

  1350 

  1351 static gint64

  1352 gst_nuv_demux_get_bytes_duration (GstNuvDemux *nuv)

  1353 {

  1354     if (nuv->priv->duration_bytes == GST_CLOCK_TIME_NONE) {

  1355         GstPad *peer = gst_pad_get_peer (nuv->priv->sinkpad);

  1356         GstQuery *query = gst_query_new_duration (GST_FORMAT_BYTES);

  1357         if (gst_pad_query (peer, query)) {

  1358             gint64 duration;

  1359 

  1360             gst_query_parse_duration (query, NULL, &duration);

  1361             nuv->priv->duration_bytes = duration;

  1362         }

  1363         gst_object_unref (peer);

  1364         gst_query_unref (query);

  1365     }

  1366     return nuv->priv->duration_bytes;

  1367 }

  1368 

  1369 static gint64

  1370 gst_nuv_demux_get_time_duration (GstNuvDemux *nuv)

  1371 {

  1372     if (nuv->priv->duration_time == GST_CLOCK_TIME_NONE) {

  1373         GstPad *peer = gst_pad_get_peer (nuv->priv->sinkpad);

  1374         GstQuery *query = gst_query_new_duration (GST_FORMAT_TIME);

  1375         if (gst_pad_query (peer, query)) {

  1376             gint64 duration;

  1377             gst_query_parse_duration (query, NULL, &duration);

  1378             nuv->priv->duration_time = duration;

  1379         }

  1380         gst_object_unref (peer);

  1381         gst_query_unref (query);

  1382     }

  1383     return nuv->priv->duration_time;

  1384 }

  1385 

  1386 

  1387 static gboolean

  1388 plugin_init (GstPlugin * plugin)

  1389 {

  1390 #ifdef ENABLE_NLS

  1391   setlocale (LC_ALL, "");

  1392   bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);

  1393 #endif /* ENABLE_NLS */

  1394 

  1395   if (!gst_element_register (plugin, "nuvdemux", GST_RANK_SECONDARY,

  1396           GST_TYPE_NUV_DEMUX)) {

  1397     return FALSE;

  1398   }

  1399   return TRUE;

  1400 }

  1401 

  1402 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,

  1403     GST_VERSION_MINOR,

  1404     "nuvdemux",

  1405     "Demuxes and muxes audio and video",

  1406     plugin_init, VERSION, "LGPL", "NuvDemux", "")
gmyth