gmyth: gst-plugins-nuvdemux/nuvdemux/gstnuvdemux.c@d591b81268b0

     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 */

    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  */

    46 #ifdef HAVE_CONFIG_H

    47 #include "config.h"

    48 #endif

    50 #include <gst/gst.h>

    51 #include <gst/gsterror.h>

    52 #include <gst/gstplugin.h>

    53 #include <string.h>

    54 #include <math.h>

    56 #include "glib/gi18n.h"

    57 #include "gstnuvdemux.h"

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

    61 GST_DEBUG_CATEGORY_STATIC (nuvdemux_debug);

    62 #define GST_CAT_DEFAULT nuvdemux_debug

    63 #define GST_FLOW_ERROR_NO_DATA  -101

    65 enum

    66 {

    67    NUV_PUSH_MODE = 0,

    68    NUV_PULL_MODE

    69 };

    71 GST_DEBUG_CATEGORY_EXTERN (GST_CAT_EVENT);

    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>");

    81 /* file header */

    82 typedef struct

    83 {

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

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

    87     gint  i_width;

    88     gint  i_height;

    89     gint  i_width_desired;

    90     gint  i_height_desired;

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

    94     gdouble  d_aspect;       /* 1.0 squared pixel */

    95     gdouble  d_fps;

    96     //fps num/denom

    97     gint     i_fpsn;

    98     gint     i_fpsd;

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

   101     gint     i_audio_blocks;

   102     gint     i_text_blocks;

   104     gint     i_keyframe_distance;

   106 } nuv_header;

   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 */

   138     gint32 i_timecode;     /* ms */

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

   141                            S: length of packet correl */

   142 } nuv_frame_header;

   144 /* FIXME Not sure of this one */

   145 typedef struct

   146 {

   147     gint             i_version;

   148     guint32		     i_video_fcc;

   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;

   166 } nuv_extended_header;

   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;

   180 struct _GstNuvDemuxPrivate {

   181   /* used for indicate the mode */

   182   guint         mode;

   184   /* used on push mode */

   185   GstAdapter    *adapter;

   187   /* pads */

   188   GstPad        *sinkpad;

   189   GstPad        *src_video_pad;

   190   GstPad        *src_audio_pad;

   192   /* Flow control */

   193   GstFlowReturn last_video_return;

   194   GstFlowReturn last_audio_return;

   196   /* NUV decoding state */

   197   GstNuvDemuxState  state;

   198   GstSegment        segment;

   199   guint64           last_update;

   200   guint64           offset;

   201   guint64           streamer_offset;

   203   /* duration information */

   204   gint64            duration_bytes;

   205   gint64            duration_time;

   206   gint64            duration_average;

   208   /* segment control info */

   209   gboolean          new_audio_segment;

   210   gboolean          new_video_segment;

   212   /* Mpeg ExtraData */

   213   guint64       mpeg_data_size;

   214   GstBuffer     *mpeg_buffer;

   216   /* Headers */

   217   nuv_header h;

   218   nuv_extended_header eh;

   219   nuv_frame_header fh;

   221   /* anothers info */

   222   gint64            time_start;

   223   gint64            time_diff;

   224   gint64            time_qos;

   225   guint64           last_frame_time;

   226 };

   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"));

   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);

   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);

   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);

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

   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;

   284   u.d = *d;

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

   286   return u.d;

   287 }

   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 */

   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 }

   313 /* GObject Functions */

   315 static void

   316 gst_nuv_demux_base_init (gpointer klass)

   317 {

   318   GstElementClass *element_class = GST_ELEMENT_CLASS (klass);

   320   gst_element_class_add_pad_template (element_class,

   321       gst_static_pad_template_get (&audio_src_template));

   323   gst_element_class_add_pad_template (element_class,

   324       gst_static_pad_template_get (&video_src_template));

   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 }

   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;

   337   GST_DEBUG_CATEGORY_INIT (nuvdemux_debug, "nuvdemux",

   338       0, "Demuxer for NUV streams");

   340   parent_class = g_type_class_peek_parent (klass);

   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;

   346   g_type_class_add_private (gobject_class, sizeof (GstNuvDemuxPrivate));

   347 }

   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);

   365   nuv->priv->new_audio_segment = TRUE;

   366   nuv->priv->new_video_segment = TRUE;

   368   /* creating adapter */

   369   nuv->priv->mode = NUV_PUSH_MODE;

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

   372   gst_nuv_demux_reset (nuv);

   373 }

   375 static void

   376 gst_nuv_demux_dispose (GObject * object)

   377 {

   378   GstNuvDemux *nuv = GST_NUV_DEMUX (object);

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

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

   382   }

   384   gst_nuv_demux_reset (GST_NUV_DEMUX (object));

   385   gst_nuv_demux_destoy_src_pad (GST_NUV_DEMUX (object));

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

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

   389   }

   390 }

   392 static void

   393 gst_nuv_demux_finalize (GObject * object)

   394 {

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

   396 }

   399 /* HeaderLoad:

   400  */

   401 static GstFlowReturn

   402 gst_nuv_demux_header_load (GstNuvDemux * nuv, nuv_header *h)

   403 {

   404   GstBuffer *buffer = NULL;

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

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

   408     return res;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

   426   GST_DEBUG_OBJECT (nuv,

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

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

   429       h->i_video_blocks, h->i_audio_blocks, h->i_text_blocks,

   430       h->i_keyframe_distance);

   432   gst_buffer_unref (buffer);

   433   return res;

   434 }

   436 static GstFlowReturn

   437 gst_nuv_demux_stream_header_data (GstNuvDemux * nuv)

   438 {

   439   GstFlowReturn res;

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

   442   if (res == GST_FLOW_OK)

   443     nuv->priv->state = GST_NUV_DEMUX_EXTRA_DATA;

   444   return res;

   445 }

   447 /*

   448  * Read NUV file tag

   449  */

   450 static GstFlowReturn

   451 gst_nuv_demux_stream_file_header (GstNuvDemux * nuv)

   452 {

   453   GstFlowReturn res = GST_FLOW_OK;

   454   GstBuffer *file_header = NULL;

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

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

   458     return res;

   459   } else {

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

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

   462       nuv->priv->state = GST_NUV_DEMUX_HEADER_DATA;

   463     } else {

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

   465       nuv->priv->state = GST_NUV_DEMUX_INVALID_DATA;

   466       res = GST_FLOW_ERROR;

   467     }

   468   }

   470   if (file_header != NULL) {

   471     gst_buffer_unref (file_header);

   472   }

   474   return res;

   475 }

   477 /* FrameHeaderLoad:

   478  */

   479 static GstFlowReturn

   480 gst_nuv_demux_frame_header_load (GstNuvDemux * nuv, nuv_frame_header *h)

   481 {

   482   unsigned char *data;

   483   GstBuffer *buf = NULL;

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

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

   488     if (buf != NULL) {

   489       gst_buffer_unref (buf);

   490       buf = NULL;

   491     }

   492     return res;

   493   }

   495   data = buf->data;

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

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

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

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

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

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

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

   505       h->i_type,

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

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

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

   510   gst_buffer_unref (buf);

   511   buf = NULL;

   512   return GST_FLOW_OK;

   513 }

   515 static GstFlowReturn

   516 gst_nuv_demux_extended_header_load (GstNuvDemux * nuv,

   517     nuv_extended_header * h)

   518 {

   519   unsigned char *data;

   520   GstBuffer *buff = NULL;

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

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

   525     if (buff != NULL) {

   526       gst_buffer_unref (buff);

   527     }

   528     return res;

   529   }

   531   data = buff->data;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

   550   GST_DEBUG_OBJECT (nuv,

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

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

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

   554       h->i_audio_sample_rate, h->i_audio_bits_per_sample, h->i_audio_channels,

   555       h->i_audio_compression_ratio, h->i_audio_quality, h->i_rtjpeg_quality,

   556       h->i_rtjpeg_luma_filter, h->i_rtjpeg_chroma_filter, h->i_lavc_bitrate,

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

   558       h->i_keyframe_adjust_offset);

   560   gst_buffer_unref (buff);

   561   return res;

   562 }

   565 /* Query Functions */

   566 static const GstQueryType *

   567 gst_nuv_demux_get_src_query_types (GstPad * pad)

   568 {

   569   static const GstQueryType src_types[] = {

   570     GST_QUERY_POSITION,

   571     GST_QUERY_DURATION,

   572     0

   573   };

   575   return src_types;

   576 }

   578 static gboolean

   579 gst_nuv_demux_handle_src_query (GstPad * pad, GstQuery * query)

   580 {

   581   gboolean res = FALSE;

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

   584   switch (GST_QUERY_TYPE (query)) {

   585     case GST_QUERY_POSITION:

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

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

   589         res = TRUE;

   590       }

   591       break;

   592     case GST_QUERY_DURATION:

   593       {

   594         gint64 duration = 0;

   595         duration = gst_nuv_demux_get_time_duration (nuv);

   596         if (duration == GST_CLOCK_TIME_NONE) {

   597             duration = nuv->priv->duration_average;

   598         }

   599         if (duration != GST_CLOCK_TIME_NONE) {

   600             gst_query_set_duration (query, GST_FORMAT_TIME, duration);

   601             res = TRUE;

   602         }

   603       }

   604       break;

   605     default:

   606       res = FALSE;

   607       break;

   608   }

   610   gst_object_unref (nuv);

   612   return res;

   613 }

   615 static GstPad*

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

   617 {

   618     GstPad *pad = NULL;

   619     pad = gst_pad_new_from_static_template (template, name);

   620     gst_pad_set_caps (pad, caps);

   621     gst_pad_set_active (pad, TRUE);

   622     gst_pad_use_fixed_caps (pad);

   623     gst_element_add_pad (GST_ELEMENT (nuv), pad);

   625     return pad;

   626 }

   628 static void

   629 gst_nuv_demux_create_pads (GstNuvDemux * nuv)

   630 {

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

   632     GstCaps *video_caps = NULL;

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

   635         "divxversion", G_TYPE_INT, 4,

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

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

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

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

   640         "pixel-aspect-ratio", GST_TYPE_FRACTION,

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

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

   644     gst_caps_unref (video_caps);

   645   }

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

   648     GstCaps *audio_caps = NULL;

   650     audio_caps = gst_caps_new_simple ("audio/mpeg",

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

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

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

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

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

   657     gst_caps_unref (audio_caps);

   658   }

   660   gst_element_no_more_pads (GST_ELEMENT (nuv));

   661 }

   663 static GstFlowReturn

   664 gst_nuv_demux_read_head_frame (GstNuvDemux * nuv)

   665 {

   666   GstFlowReturn ret = GST_FLOW_OK;

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

   669   if (ret != GST_FLOW_OK)

   670     return ret;

   672   nuv->priv->state = GST_NUV_DEMUX_MOVI;

   673   return ret;

   674 }

   676 static gboolean

   677 gst_nuv_combine_flow (GstNuvDemux *nuv)

   678 {

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

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

   682     if ((ret_video != GST_FLOW_OK) &&

   683         (ret_audio != GST_FLOW_OK))

   684         return FALSE;

   686     if (GST_FLOW_IS_FATAL (ret_video))

   687         return FALSE;

   689     if (GST_FLOW_IS_FATAL (ret_audio))

   690         return FALSE;

   692     return TRUE;

   693 }

   695 static GstFlowReturn

   696 gst_nuv_demux_stream_data (GstNuvDemux * nuv)

   697 {

   698   GstFlowReturn ret = GST_FLOW_OK;

   699   GstPad *pad = NULL;

   700   guint64 timestamp;

   701   GstBuffer *buf = NULL;

   702   nuv_frame_header h;

   704   h = nuv->priv->fh;

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

   707     goto done;

   709   if (h.i_length > 0) {

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

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

   712 		  return ret;

   714       if (h.i_timecode < 0) {

   715           h.i_timecode = h.i_timecode * -1;

   716           nuv->priv->time_diff = h.i_timecode;

   717       }

   718       else

   719           h.i_timecode += nuv->priv->time_diff;

   721       timestamp = h.i_timecode * GST_MSECOND;

   722       GST_BUFFER_TIMESTAMP (buf) = timestamp;

   723   }

   724   else {

   725     goto done;

   726   }

   729   switch (h.i_type) {

   730     case 'V':

   731     {

   732       pad = nuv->priv->src_video_pad;

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

   736         /* send new segment event*/

   737         gst_pad_push_event (nuv->priv->src_video_pad,

   738           gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0,

   739                                      GST_CLOCK_TIME_NONE, 0));

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

   742             nuv->priv->time_start = timestamp;

   743         }

   744         nuv->priv->new_video_segment = FALSE;

   745       }

   747       break;

   748     }

   749     case 'A':

   750     {

   751       pad = nuv->priv->src_audio_pad;

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

   754         /* send new segment event*/

   755         gst_pad_push_event (nuv->priv->src_audio_pad,

   756           gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0,

   757                                      GST_CLOCK_TIME_NONE, 0));

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

   760             nuv->priv->time_start = timestamp;

   761         }

   762         nuv->priv->new_audio_segment = FALSE;

   763       }

   765       break;

   766     }

   767     case 'S':

   768     {

   769       switch (h.i_compression) {

   770         case 'V':

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

   772           gst_pad_push_event (nuv->priv->src_video_pad,

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

   774               		GST_CLOCK_TIME_NONE, 0));

   775           break;

   776         case 'A':

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

   778           gst_pad_push_event (nuv->priv->src_audio_pad,

   779               gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0,

   780               		GST_CLOCK_TIME_NONE, 0));

   781           break;

   782         default:

   783           break;

   784       }

   785       goto done;

   786     }

   787     default:

   788       break;

   789   }

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

   792       /* update average time */

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

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

   795       gst_nuv_demux_update_duration (nuv, timestamp);

   797       /* pushing the buffer */

   798       gst_buffer_set_caps (buf, GST_PAD_CAPS (pad));

   799       ret = gst_pad_push (pad, buf);

   800       buf = NULL;

   802       if (ret != GST_FLOW_OK) {

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

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

   806             nuv->priv->last_video_return = ret;

   807         }

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

   809             nuv->priv->last_audio_return = ret;

   810         }

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

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

   814             ret = GST_FLOW_OK;

   815         }

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

   818       }

   819   }

   821 done:

   822   if (buf != NULL) {

   823       g_free (buf->data);

   824       gst_buffer_unref (buf);

   825       buf = NULL;

   826   }

   827   nuv->priv->state = GST_NUV_DEMUX_FRAME_HEADER;

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

   829   return ret;

   830 }

   832 static GstFlowReturn

   833 gst_nuv_demux_stream_mpeg_data (GstNuvDemux * nuv)

   834 {

   835   GstFlowReturn ret = GST_FLOW_OK;

   837   /* ffmpeg extra data */

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

   839       &nuv->priv->mpeg_buffer);

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

   841     return ret;

   842   }

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

   845   nuv->priv->state = GST_NUV_DEMUX_EXTEND_HEADER;

   846   return ret;

   847 }

   849 static GstFlowReturn

   850 gst_nuv_demux_stream_extra_data (GstNuvDemux * nuv)

   851 {

   852   GstFlowReturn ret = GST_FLOW_OK;

   854   /* Load 'D' */

   855   nuv_frame_header h;

   857   ret = gst_nuv_demux_frame_header_load (nuv, &h);

   858   if (ret != GST_FLOW_OK)

   859     return ret;

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

   862     GST_WARNING_OBJECT (nuv, "Unsuported rtjpeg");

   863     return GST_FLOW_NOT_SUPPORTED;

   864   }

   866   if (h.i_length > 0) {

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

   868       nuv->priv->state = GST_NUV_DEMUX_MPEG_DATA;

   869     } else {

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

   871       return GST_FLOW_NOT_SUPPORTED;

   872     }

   873   } else {

   874     nuv->priv->state = GST_NUV_DEMUX_EXTEND_HEADER;

   875   }

   877   return ret;

   878 }

   880 static GstFlowReturn

   881 gst_nuv_demux_stream_extend_header_data (GstNuvDemux * nuv)

   882 {

   883   GstFlowReturn ret = GST_FLOW_OK;

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

   886   if (ret != GST_FLOW_OK)

   887     return ret;

   889   gst_nuv_demux_create_pads (nuv);

   890   nuv->priv->state = GST_NUV_DEMUX_FRAME_HEADER;

   891   return ret;

   892 }

   894 static GstFlowReturn

   895 gst_nuv_demux_stream_extend_header (GstNuvDemux * nuv)

   896 {

   897   GstBuffer *buf = NULL;

   898   GstFlowReturn res = GST_FLOW_OK;

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

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

   902     if (buf != NULL) {

   903       gst_buffer_unref (buf);

   904     }

   905     return res;

   906   }

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

   909     gst_buffer_unref (buf);

   910     buf = NULL;

   911     nuv_frame_header h;

   913     res = gst_nuv_demux_frame_header_load (nuv, &h);

   914     if (res != GST_FLOW_OK)

   915       return res;

   917     if (h.i_length != 512) {

   918       return GST_FLOW_ERROR;

   919     }

   920     nuv->priv->state = GST_NUV_DEMUX_EXTEND_HEADER_DATA;

   921   } else {

   922     nuv->priv->state = GST_NUV_DEMUX_INVALID_DATA;

   923     g_object_unref (buf);

   924     GST_ELEMENT_WARNING (nuv, STREAM, FAILED,

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

   926     return GST_FLOW_ERROR;

   927   }

   928   return res;

   929 }

   931 static GstFlowReturn

   932 gst_nuv_demux_play (GstPad * pad)

   933 {

   934   GstFlowReturn res = GST_FLOW_OK;

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

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

   938     case GST_NUV_DEMUX_START:

   939       res = gst_nuv_demux_stream_file_header (nuv);

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

   941         goto pause;

   942       }

   943       break;

   945     case GST_NUV_DEMUX_HEADER_DATA:

   946       res = gst_nuv_demux_stream_header_data (nuv);

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

   948         goto pause;

   949       }

   950       break;

   952     case GST_NUV_DEMUX_EXTRA_DATA:

   953       res = gst_nuv_demux_stream_extra_data (nuv);

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

   955         goto pause;

   956       }

   957       break;

   959     case GST_NUV_DEMUX_MPEG_DATA:

   960       res = gst_nuv_demux_stream_mpeg_data (nuv);

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

   962         goto pause;

   963       }

   964       break;

   966     case GST_NUV_DEMUX_EXTEND_HEADER:

   967       res = gst_nuv_demux_stream_extend_header (nuv);

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

   969         goto pause;

   970       }

   971       break;

   973     case GST_NUV_DEMUX_EXTEND_HEADER_DATA:

   974       res = gst_nuv_demux_stream_extend_header_data (nuv);

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

   976         goto pause;

   977       }

   978       break;

   980     case GST_NUV_DEMUX_FRAME_HEADER:

   981       res = gst_nuv_demux_read_head_frame (nuv);

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

   983         goto pause;

   984       }

   985       break;

   987     case GST_NUV_DEMUX_MOVI:

   988       res = gst_nuv_demux_stream_data (nuv);

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

   990         goto pause;

   991       }

   992       break;

   994     case GST_NUV_DEMUX_INVALID_DATA:

   995       goto pause;

   996       break;

   997     default:

   998       g_assert_not_reached ();

   999   }

  1001   GST_DEBUG_OBJECT (nuv, "state: %d res:%s", nuv->priv->state, gst_flow_get_name (res));

  1003   return GST_FLOW_OK;

  1005 pause:

  1006   GST_LOG_OBJECT (nuv, "pausing task, reason %s", gst_flow_get_name (res));

  1007   gst_pad_pause_task (nuv->priv->sinkpad);

  1008   if (GST_FLOW_IS_FATAL (res)) {

  1009     GST_ELEMENT_ERROR (nuv, STREAM, FAILED,

  1010         (_("Internal data stream error.")),

  1011         ("streaming stopped, reason %s", gst_flow_get_name (res)));

  1013     gst_nuv_demux_send_eos (nuv);

  1014   }

  1015   return res;

  1016 }

  1018 static void

  1019 gst_nuv_demux_send_eos (GstNuvDemux * nuv)

  1020 {

  1021   gst_element_post_message (GST_ELEMENT (nuv),

  1022       gst_message_new_segment_done (GST_OBJECT (nuv), GST_FORMAT_TIME, -1));

  1024   if (nuv->priv->src_video_pad)

  1025     gst_pad_push_event (nuv->priv->src_video_pad, gst_event_new_eos ());

  1026   if (nuv->priv->src_audio_pad)

  1027     gst_pad_push_event (nuv->priv->src_audio_pad, gst_event_new_eos ());

  1028 }

  1030 static GstFlowReturn

  1031 gst_nuv_demux_read_bytes (GstNuvDemux * nuv, guint64 size, gboolean move,

  1032     GstBuffer ** buffer)

  1033 {

  1034   GstFlowReturn ret = GST_FLOW_OK;

  1036   if (size == 0) {

  1037     return ret;

  1038   }

  1040   if (nuv->priv->mode == NUV_PULL_MODE) {

  1041     ret = gst_pad_pull_range (nuv->priv->sinkpad, nuv->priv->offset, size, buffer);

  1042     if (ret == GST_FLOW_OK) {

  1043         if (move) {

  1044 		    nuv->priv->offset += size;

  1045 		}

  1046       /* got eos */

  1047     } else if (ret == GST_FLOW_UNEXPECTED) {

  1048       if (buffer != NULL)

  1049           gst_buffer_unref (buffer);

  1051       gst_nuv_demux_send_eos (nuv);

  1052       return GST_FLOW_WRONG_STATE;

  1053     }

  1054   } else {

  1055     if (gst_adapter_available (nuv->priv->adapter) < size)

  1056       return GST_FLOW_ERROR_NO_DATA;

  1058     if (move) {

  1059       guint8 *data = NULL;

  1060       data = (guint8 *) gst_adapter_take (nuv->priv->adapter, size);

  1061       *buffer = gst_buffer_new_alloc (size);

  1062       memcpy (GST_BUFFER_DATA (*buffer), data, size);

  1063       GST_BUFFER_MALLOCDATA (*buffer) = GST_BUFFER_DATA (*buffer);

  1064       g_free (data);

  1065     } else {

  1066       guint8 *data = NULL;

  1067       data = (guint8 *) gst_adapter_peek (nuv->priv->adapter, size);

  1068       *buffer = gst_buffer_new ();

  1069       gst_buffer_set_data (*buffer, data, size);

  1070     }

  1071   }

  1072   return ret;

  1073 }

  1075 static gboolean

  1076 gst_nuv_demux_sink_activate (GstPad * sinkpad)

  1077 {

  1078   gboolean res = TRUE;

  1079   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (sinkpad));

  1081   res = gst_pad_activate_push (sinkpad, TRUE);

  1082   /*

  1084   if (gst_pad_check_pull_range (sinkpad)) {

  1085     res = gst_pad_activate_pull (sinkpad, TRUE);

  1086   } else {

  1087     res = gst_pad_activate_push (sinkpad, TRUE);

  1088   }

  1089   */

  1090   g_object_unref (nuv);

  1091   return res;

  1092 }

  1094 static gboolean

  1095 gst_nuv_demux_sink_activate_pull (GstPad * sinkpad, gboolean active)

  1096 {

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

  1099   if (active) {

  1100     GST_DEBUG_OBJECT (nuv, "activating pull function");

  1101     nuv->priv->mode = NUV_PULL_MODE;

  1102     if (nuv->priv->adapter) {

  1103       gst_adapter_clear (nuv->priv->adapter);

  1104       g_object_unref (nuv->priv->adapter);

  1105       nuv->priv->adapter = NULL;

  1106     }

  1107     gst_pad_start_task (sinkpad, (GstTaskFunction) gst_nuv_demux_loop, sinkpad);

  1108   } else {

  1109     GST_DEBUG_OBJECT (nuv, "deactivating pull function");

  1110     gst_pad_stop_task (sinkpad);

  1111   }

  1112   gst_object_unref (nuv);

  1114   return TRUE;

  1115 }

  1117 static gboolean

  1118 gst_nuv_demux_sink_activate_push (GstPad * pad, gboolean active)

  1119 {

  1120   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

  1123   if (active) {

  1124     GST_DEBUG_OBJECT (nuv, "activating push/chain function");

  1125   } else {

  1126     GST_DEBUG_OBJECT (nuv, "deactivating push/chain function");

  1127   }

  1129   gst_object_unref (nuv);

  1131   return TRUE;

  1132 }

  1135 static gboolean

  1136 gst_nuv_demux_sink_event (GstPad *pad, GstEvent *event)

  1137 {

  1138   gboolean res;

  1139   GstNuvDemux *nuv;

  1141   nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

  1143   switch (GST_EVENT_TYPE (event)) {

  1144     case GST_EVENT_SEEK:

  1145     {

  1146       gdouble rate;

  1147       GstFormat format;

  1148       GstSeekFlags flags;

  1149       GstSeekType cur_type;

  1150       gint64 cur;

  1151       GstSeekType stop_type;

  1152       gint64 stop;

  1154       gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &cur, &stop_type, &stop);

  1156       GST_DEBUG_OBJECT (nuv, "got seek, start %" G_GINT64_FORMAT ", stop %" G_GINT64_FORMAT, cur, stop);

  1158       break;

  1159     }

  1160     case GST_EVENT_NEWSEGMENT:

  1161     {

  1162       gint64 start, stop, time;

  1163       gdouble rate, arate;

  1164       GstFormat format;

  1165       gboolean update;

  1167       GST_DEBUG_OBJECT (nuv, "got a new segment event");

  1168       gst_event_parse_new_segment (event, &update, &rate, &format, &start, &stop, &time);

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

  1171       nuv->priv->duration_bytes = stop - start;

  1172       gst_event_unref (event);

  1173       res = TRUE;

  1174       break;

  1175     }

  1176     case GST_EVENT_QOS:

  1177     {

  1178 /*

  1179       gdouble proportion;

  1180       GstClockTimeDiff diff;

  1181       GstClockTime timestamp;

  1183       gst_event_parse_qos (event, &proportion, &diff, &timestamp);

  1184       if (diff > 0)

  1185         nuv->time_qos = timecode + diff;

  1186       else

  1187         nuv->time_qos = -1;

  1188 */

  1190       break;

  1191     }

  1193     case GST_EVENT_EOS:

  1194     default:

  1195       res = gst_pad_event_default (pad, event);

  1196       break;

  1197   }

  1199   gst_object_unref (nuv);

  1200   return res;

  1201 }

  1203 static GstFlowReturn

  1204 gst_nuv_demux_chain (GstPad * pad, GstBuffer * buf)

  1205 {

  1206   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

  1208   GST_DEBUG_OBJECT (nuv, " gst_nuv_demux_chain function");

  1209   gst_adapter_push (nuv->priv->adapter, buf);

  1211   gst_object_unref (nuv);

  1212   //gst_buffer_unref (buf);

  1214   return gst_nuv_demux_play (pad);

  1215 }

  1217 static void

  1218 gst_nuv_demux_loop (GstPad * pad)

  1219 {

  1220   gst_nuv_demux_play (pad);

  1221 }

  1223 static void

  1224 gst_nuv_demux_reset (GstNuvDemux * nuv)

  1225 {

  1226   nuv->priv->state = GST_NUV_DEMUX_START;

  1227   nuv->priv->mode = 0;

  1228   nuv->priv->offset = 0;

  1229   nuv->priv->streamer_offset = 0;

  1230   nuv->priv->time_start = 0;

  1231   nuv->priv->time_qos = GST_CLOCK_TIME_NONE;

  1232   nuv->priv->duration_bytes = GST_CLOCK_TIME_NONE;

  1233   nuv->priv->duration_time = GST_CLOCK_TIME_NONE;

  1234   nuv->priv->duration_average = GST_CLOCK_TIME_NONE;

  1235   gst_segment_init (&nuv->priv->segment, GST_FORMAT_TIME);

  1237   if (nuv->priv->adapter != NULL)

  1238     gst_adapter_clear (nuv->priv->adapter);

  1240   if (nuv->priv->mpeg_buffer != NULL) {

  1241     gst_buffer_unref (nuv->priv->mpeg_buffer);

  1242     nuv->priv->mpeg_buffer = NULL;

  1243   }

  1244 }

  1246 static void

  1247 gst_nuv_demux_destoy_src_pad (GstNuvDemux * nuv)

  1248 {

  1249   if (nuv->priv->src_video_pad) {

  1250     gst_element_remove_pad (GST_ELEMENT (nuv), nuv->priv->src_video_pad);

  1251     nuv->priv->src_video_pad = NULL;

  1252   }

  1254   if (nuv->priv->src_audio_pad) {

  1255     gst_element_remove_pad (GST_ELEMENT (nuv), nuv->priv->src_audio_pad);

  1256     nuv->priv->src_audio_pad = NULL;

  1257   }

  1258 }

  1260 static GstStateChangeReturn

  1261 gst_nuv_demux_change_state (GstElement * element, GstStateChange transition)

  1262 {

  1263   GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;

  1265   switch (transition) {

  1266     case GST_STATE_CHANGE_NULL_TO_READY:

  1267       gst_nuv_demux_reset (GST_NUV_DEMUX (element));

  1268       gst_nuv_demux_destoy_src_pad (GST_NUV_DEMUX (element));

  1269       break;

  1270     default:

  1271       break;

  1272   }

  1274   ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);

  1275   if (ret == GST_STATE_CHANGE_FAILURE) {

  1276     goto done;

  1277   }

  1279   switch (transition) {

  1280     case GST_STATE_CHANGE_READY_TO_NULL:

  1281       gst_nuv_demux_reset (GST_NUV_DEMUX (element));

  1282       gst_nuv_demux_destoy_src_pad (GST_NUV_DEMUX (element));

  1283       break;

  1284     default:

  1285       break;

  1286   }

  1288 done:

  1289   return ret;

  1290 }

  1292 static void

  1293 gst_nuv_demux_update_duration (GstNuvDemux *nuv, guint64 current_timestamp)

  1294 {

  1295     guint64 interval = 0;

  1296     return;

  1298     if (gst_nuv_demux_get_time_duration (nuv) != GST_CLOCK_TIME_NONE)

  1299         return;

  1301     interval  = current_timestamp - nuv->priv->last_update;

  1303     if (interval > (10 * GST_SECOND)) {

  1304         GstMessage* msg = NULL;

  1305         gint64 average = 0;

  1306         gint64 duration_bytes = gst_nuv_demux_get_bytes_duration (nuv);

  1308         if (duration_bytes == GST_CLOCK_TIME_NONE)

  1309             return;

  1311         interval = gst_util_uint64_scale (1, current_timestamp - nuv->priv->time_start, GST_SECOND);

  1312         if (interval > 0) {

  1313             average = gst_util_uint64_scale (1 , nuv->priv->streamer_offset, interval);

  1314         }

  1315         if (average > 0) {

  1316             nuv->priv->duration_average = gst_util_uint64_scale (GST_SECOND, duration_bytes, average);

  1317         }

  1319         nuv->priv->last_update = current_timestamp;

  1320         msg = gst_message_new_duration (GST_OBJECT (nuv), GST_FORMAT_TIME, nuv->priv->duration_average);

  1321         gst_element_post_message (GST_ELEMENT (nuv), msg);

  1322         GST_DEBUG_OBJECT (nuv, "New Duration Average %"G_GUINT64_FORMAT, nuv->priv->duration_average);

  1323     }

  1324 }

  1326 static gint64

  1327 gst_nuv_demux_get_bytes_duration (GstNuvDemux *nuv)

  1328 {

  1329     if (nuv->priv->duration_bytes == GST_CLOCK_TIME_NONE) {

  1330         GstPad *peer = gst_pad_get_peer (nuv->priv->sinkpad);

  1331         GstQuery *query = gst_query_new_duration (GST_FORMAT_BYTES);

  1332         if (gst_pad_query (peer, query)) {

  1333             gint64 duration;

  1335             gst_query_parse_duration (query, NULL, &duration);

  1336             nuv->priv->duration_bytes = duration;

  1337         }

  1338         gst_object_unref (peer);

  1339         gst_query_unref (query);

  1340     }

  1341     return nuv->priv->duration_bytes;

  1342 }

  1344 static gint64

  1345 gst_nuv_demux_get_time_duration (GstNuvDemux *nuv)

  1346 {

  1347     if (nuv->priv->duration_time == GST_CLOCK_TIME_NONE) {

  1348         GstPad *peer = gst_pad_get_peer (nuv->priv->sinkpad);

  1349         GstQuery *query = gst_query_new_duration (GST_FORMAT_TIME);

  1350         if (gst_pad_query (peer, query)) {

  1351             gint64 duration;

  1352             gst_query_parse_duration (query, NULL, &duration);

  1353             nuv->priv->duration_time = duration;

  1354         }

  1355         gst_object_unref (peer);

  1356         gst_query_unref (query);

  1357     }

  1358     return nuv->priv->duration_time;

  1359 }

  1362 static gboolean

  1363 plugin_init (GstPlugin * plugin)

  1364 {

  1365 #ifdef ENABLE_NLS

  1366   setlocale (LC_ALL, "");

  1367   bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);

  1368 #endif /* ENABLE_NLS */

  1370   if (!gst_element_register (plugin, "nuvdemux", GST_RANK_SECONDARY,

  1371           GST_TYPE_NUV_DEMUX)) {

  1372     return FALSE;

  1373   }

  1374   return TRUE;

  1375 }

  1377 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,

  1378     GST_VERSION_MINOR,

  1379     "nuvdemux",

  1380     "Demuxes and muxes audio and video",

  1381      plugin_init, VERSION, "LGPL", "NuvDemux", "")

author	renatofilho
	Fri Dec 01 21:19:03 2006 +0000 (2006-12-01)
branch	trunk
changeset 172	d591b81268b0
parent 171	dda330ac986f
child 173	a2ec843160c8
permissions	-rw-r--r--