gmyth: gst-plugins-nuvdemux/nuvdemux/gstnuvdemux.c@d021c43d190c

     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);

   267 GstBuffer * gst_nuv_demux_adapter_take_buffer (GstAdapter * adapter, guint nbytes);

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

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

   274  * Utils function

   275  ******************************************************************************/

   276 #if G_BYTE_ORDER == G_BIG_ENDIAN

   277 static inline gdouble

   278 _gdouble_swap_le_be (gdouble * d)

   279 {

   280   union

   281   {

   282     guint64 i;

   283     gdouble d;

   284   } u;

   286   u.d = *d;

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

   288   return u.d;

   289 }

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

   292 #else /* G_BYTE_ORDER != G_BIG_ENDIAN */

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

   294 #endif /* G_BYTE_ORDER != G_BIG_ENDIAN */

   296 static void

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

   298 {

   299     if (in == 29.97) {

   300         *num = 30000;

   301         *denom = 1001;

   302     } else if (in == 23.976) {

   303         *num = 24000;

   304         *denom = 1001;

   305     } else {

   306         *denom = 1;

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

   308             *denom *= 10;

   309             in *= 10.0;

   310         }

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

   312     }

   313 }

   315 /* GObject Functions */

   317 static void

   318 gst_nuv_demux_base_init (gpointer klass)

   319 {

   320   GstElementClass *element_class = GST_ELEMENT_CLASS (klass);

   322   gst_element_class_add_pad_template (element_class,

   323       gst_static_pad_template_get (&audio_src_template));

   325   gst_element_class_add_pad_template (element_class,

   326       gst_static_pad_template_get (&video_src_template));

   328   gst_element_class_add_pad_template (element_class,

   329       gst_static_pad_template_get (&sink_template));

   330   gst_element_class_set_details (element_class, &gst_nuv_demux_details);

   331 }

   333 static void

   334 gst_nuv_demux_class_init (GstNuvDemuxClass * klass)

   335 {

   336   GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);

   337   GObjectClass *gobject_class = (GObjectClass *) klass;

   339   GST_DEBUG_CATEGORY_INIT (nuvdemux_debug, "nuvdemux",

   340       0, "Demuxer for NUV streams");

   342   parent_class = g_type_class_peek_parent (klass);

   344   gobject_class->dispose = gst_nuv_demux_dispose;

   345   gobject_class->finalize = gst_nuv_demux_finalize;

   346   gstelement_class->change_state = gst_nuv_demux_change_state;

   348   g_type_class_add_private (gobject_class, sizeof (GstNuvDemuxPrivate));

   349 }

   351 static void

   352 gst_nuv_demux_init (GstNuvDemux * nuv, GstNuvDemuxClass * nuv_class)

   353 {

   354   nuv->priv = GST_NUV_DEMUX_GET_PRIVATE (nuv);

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

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

   357   gst_pad_set_activatepull_function (nuv->priv->sinkpad,

   358       gst_nuv_demux_sink_activate_pull);

   359   gst_pad_set_activatepush_function (nuv->priv->sinkpad,

   360       gst_nuv_demux_sink_activate_push);

   361   gst_pad_set_chain_function (nuv->priv->sinkpad,

   362       GST_DEBUG_FUNCPTR (gst_nuv_demux_chain));

   363   gst_pad_set_event_function (nuv->priv->sinkpad,

   364       gst_nuv_demux_sink_event);

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

   367   nuv->priv->new_audio_segment = TRUE;

   368   nuv->priv->new_video_segment = TRUE;

   370   /* creating adapter */

   371   nuv->priv->mode = NUV_PUSH_MODE;

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

   374   gst_nuv_demux_reset (nuv);

   375 }

   377 static void

   378 gst_nuv_demux_dispose (GObject * object)

   379 {

   380   GstNuvDemux *nuv = GST_NUV_DEMUX (object);

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

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

   384   }

   386   gst_nuv_demux_reset (GST_NUV_DEMUX (object));

   387   gst_nuv_demux_destoy_src_pad (GST_NUV_DEMUX (object));

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

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

   391   }

   392 }

   394 static void

   395 gst_nuv_demux_finalize (GObject * object)

   396 {

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

   398 }

   401 /* HeaderLoad:

   402  */

   403 static GstFlowReturn

   404 gst_nuv_demux_header_load (GstNuvDemux * nuv, nuv_header *h)

   405 {

   406   GstBuffer *buffer = NULL;

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

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

   410     return res;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

   428   GST_DEBUG_OBJECT (nuv,

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

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

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

   432       h->i_keyframe_distance);

   434   gst_buffer_unref (buffer);

   435   return res;

   436 }

   438 static GstFlowReturn

   439 gst_nuv_demux_stream_header_data (GstNuvDemux * nuv)

   440 {

   441   GstFlowReturn res;

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

   444   if (res == GST_FLOW_OK)

   445     nuv->priv->state = GST_NUV_DEMUX_EXTRA_DATA;

   446   return res;

   447 }

   449 /*

   450  * Read NUV file tag

   451  */

   452 static GstFlowReturn

   453 gst_nuv_demux_stream_file_header (GstNuvDemux * nuv)

   454 {

   455   GstFlowReturn res = GST_FLOW_OK;

   456   GstBuffer *file_header = NULL;

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

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

   460     return res;

   461   } else {

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

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

   464       nuv->priv->state = GST_NUV_DEMUX_HEADER_DATA;

   465     } else {

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

   467       nuv->priv->state = GST_NUV_DEMUX_INVALID_DATA;

   468       res = GST_FLOW_ERROR;

   469     }

   470   }

   472   if (file_header != NULL) {

   473     gst_buffer_unref (file_header);

   474   }

   476   return res;

   477 }

   479 /* FrameHeaderLoad:

   480  */

   481 static GstFlowReturn

   482 gst_nuv_demux_frame_header_load (GstNuvDemux * nuv, nuv_frame_header *h)

   483 {

   484   unsigned char *data;

   485   GstBuffer *buf = NULL;

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

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

   490     if (buf != NULL) {

   491       gst_buffer_unref (buf);

   492       buf = NULL;

   493     }

   494     return res;

   495   }

   497   data = buf->data;

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

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

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

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

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

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

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

   507       h->i_type,

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

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

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

   512   gst_buffer_unref (buf);

   513   buf = NULL;

   514   return GST_FLOW_OK;

   515 }

   517 static GstFlowReturn

   518 gst_nuv_demux_extended_header_load (GstNuvDemux * nuv,

   519     nuv_extended_header * h)

   520 {

   521   unsigned char *data;

   522   GstBuffer *buff = NULL;

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

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

   527     if (buff != NULL) {

   528       gst_buffer_unref (buff);

   529     }

   530     return res;

   531   }

   533   data = buff->data;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

   552   GST_DEBUG_OBJECT (nuv,

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

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

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

   556       h->i_audio_sample_rate, h->i_audio_bits_per_sample, h->i_audio_channels,

   557       h->i_audio_compression_ratio, h->i_audio_quality, h->i_rtjpeg_quality,

   558       h->i_rtjpeg_luma_filter, h->i_rtjpeg_chroma_filter, h->i_lavc_bitrate,

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

   560       h->i_keyframe_adjust_offset);

   562   gst_buffer_unref (buff);

   563   return res;

   564 }

   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   };

   577   return src_types;

   578 }

   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));

   586   switch (GST_QUERY_TYPE (query)) {

   587     case GST_QUERY_POSITION:

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

   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   }

   612   gst_object_unref (nuv);

   614   return res;

   615 }

   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_set_caps (pad, caps);

   623     gst_pad_set_active (pad, TRUE);

   624     gst_pad_use_fixed_caps (pad);

   625     gst_element_add_pad (GST_ELEMENT (nuv), pad);

   627     return pad;

   628 }

   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;

   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);

   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   }

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

   650     GstCaps *audio_caps = NULL;

   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);

   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   }

   662   gst_element_no_more_pads (GST_ELEMENT (nuv));

   663 }

   665 static GstFlowReturn

   666 gst_nuv_demux_read_head_frame (GstNuvDemux * nuv)

   667 {

   668   GstFlowReturn ret = GST_FLOW_OK;

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

   671   if (ret != GST_FLOW_OK)

   672     return ret;

   674   nuv->priv->state = GST_NUV_DEMUX_MOVI;

   675   return ret;

   676 }

   678 static gboolean

   679 gst_nuv_combine_flow (GstNuvDemux *nuv)

   680 {

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

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

   684     if ((ret_video != GST_FLOW_OK) &&

   685         (ret_audio != GST_FLOW_OK))

   686         return FALSE;

   688     if (GST_FLOW_IS_FATAL (ret_video))

   689         return FALSE;

   691     if (GST_FLOW_IS_FATAL (ret_audio))

   692         return FALSE;

   694     return TRUE;

   695 }

   697 static GstFlowReturn

   698 gst_nuv_demux_stream_data (GstNuvDemux * nuv)

   699 {

   700   GstFlowReturn ret = GST_FLOW_OK;

   701   GstPad *pad = NULL;

   702   guint64 timestamp;

   703   GstBuffer *buf = NULL;

   704   nuv_frame_header h;

   706   h = nuv->priv->fh;

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

   709     goto done;

   711   if (h.i_length > 0) {

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

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

   714 		  return ret;

   716       if (h.i_timecode < 0) {

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

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

   719       }

   720       else

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

   723       timestamp = h.i_timecode * GST_MSECOND;

   724       GST_BUFFER_TIMESTAMP (buf) = timestamp;

   725   }

   726   else {

   727     goto done;

   728   }

   731   switch (h.i_type) {

   732     case 'V':

   733     {

   734       pad = nuv->priv->src_video_pad;

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

   738         /* send new segment event*/

   739         gst_pad_push_event (nuv->priv->src_video_pad,

   740           gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0,

   741                                      GST_CLOCK_TIME_NONE, 0));

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

   744             nuv->priv->time_start = timestamp;

   745         }

   746         nuv->priv->new_video_segment = FALSE;

   747       }

   749       break;

   750     }

   751     case 'A':

   752     {

   753       pad = nuv->priv->src_audio_pad;

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

   756         /* send new segment event*/

   757         gst_pad_push_event (nuv->priv->src_audio_pad,

   758           gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0,

   759                                      GST_CLOCK_TIME_NONE, 0));

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

   762             nuv->priv->time_start = timestamp;

   763         }

   764         nuv->priv->new_audio_segment = FALSE;

   765       }

   767       break;

   768     }

   769     case 'S':

   770     {

   771       switch (h.i_compression) {

   772         case 'V':

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

   774           gst_pad_push_event (nuv->priv->src_video_pad,

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

   776               		GST_CLOCK_TIME_NONE, 0));

   777           break;

   778         case 'A':

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

   780           gst_pad_push_event (nuv->priv->src_audio_pad,

   781               gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0,

   782               		GST_CLOCK_TIME_NONE, 0));

   783           break;

   784         default:

   785           break;

   786       }

   787       goto done;

   788     }

   789     default:

   790       break;

   791   }

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

   794       /* update average time */

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

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

   797       gst_nuv_demux_update_duration (nuv, timestamp);

   799       /* pushing the buffer */

   800       gst_buffer_set_caps (buf, GST_PAD_CAPS (pad));

   801       ret = gst_pad_push (pad, buf);

   802       buf = NULL;

   804       if (ret != GST_FLOW_OK) {

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

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

   808             nuv->priv->last_video_return = ret;

   809         }

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

   811             nuv->priv->last_audio_return = ret;

   812         }

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

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

   816             ret = GST_FLOW_OK;

   817         }

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

   820       }

   821   }

   823 done:

   824   if (buf != NULL) {

   825       g_free (buf->data);

   826       gst_buffer_unref (buf);

   827       buf = NULL;

   828   }

   829   nuv->priv->state = GST_NUV_DEMUX_FRAME_HEADER;

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

   831   return ret;

   832 }

   834 static GstFlowReturn

   835 gst_nuv_demux_stream_mpeg_data (GstNuvDemux * nuv)

   836 {

   837   GstFlowReturn ret = GST_FLOW_OK;

   839   /* ffmpeg extra data */

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

   841       &nuv->priv->mpeg_buffer);

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

   843     return ret;

   844   }

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

   847   nuv->priv->state = GST_NUV_DEMUX_EXTEND_HEADER;

   848   return ret;

   849 }

   851 static GstFlowReturn

   852 gst_nuv_demux_stream_extra_data (GstNuvDemux * nuv)

   853 {

   854   GstFlowReturn ret = GST_FLOW_OK;

   856   /* Load 'D' */

   857   nuv_frame_header h;

   859   ret = gst_nuv_demux_frame_header_load (nuv, &h);

   860   if (ret != GST_FLOW_OK)

   861     return ret;

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

   864     GST_WARNING_OBJECT (nuv, "Unsuported rtjpeg");

   865     return GST_FLOW_NOT_SUPPORTED;

   866   }

   868   if (h.i_length > 0) {

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

   870       nuv->priv->state = GST_NUV_DEMUX_MPEG_DATA;

   871     } else {

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

   873       return GST_FLOW_NOT_SUPPORTED;

   874     }

   875   } else {

   876     nuv->priv->state = GST_NUV_DEMUX_EXTEND_HEADER;

   877   }

   879   return ret;

   880 }

   882 static GstFlowReturn

   883 gst_nuv_demux_stream_extend_header_data (GstNuvDemux * nuv)

   884 {

   885   GstFlowReturn ret = GST_FLOW_OK;

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

   888   if (ret != GST_FLOW_OK)

   889     return ret;

   891   gst_nuv_demux_create_pads (nuv);

   892   nuv->priv->state = GST_NUV_DEMUX_FRAME_HEADER;

   893   return ret;

   894 }

   896 static GstFlowReturn

   897 gst_nuv_demux_stream_extend_header (GstNuvDemux * nuv)

   898 {

   899   GstBuffer *buf = NULL;

   900   GstFlowReturn res = GST_FLOW_OK;

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

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

   904     if (buf != NULL) {

   905       gst_buffer_unref (buf);

   906     }

   907     return res;

   908   }

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

   911     gst_buffer_unref (buf);

   912     buf = NULL;

   913     nuv_frame_header h;

   915     res = gst_nuv_demux_frame_header_load (nuv, &h);

   916     if (res != GST_FLOW_OK)

   917       return res;

   919     if (h.i_length != 512) {

   920       return GST_FLOW_ERROR;

   921     }

   922     nuv->priv->state = GST_NUV_DEMUX_EXTEND_HEADER_DATA;

   923   } else {

   924     nuv->priv->state = GST_NUV_DEMUX_INVALID_DATA;

   925     g_object_unref (buf);

   926     GST_ELEMENT_WARNING (nuv, STREAM, FAILED,

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

   928     return GST_FLOW_ERROR;

   929   }

   930   return res;

   931 }

   933 static GstFlowReturn

   934 gst_nuv_demux_play (GstPad * pad)

   935 {

   936   GstFlowReturn res = GST_FLOW_OK;

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

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

   940     case GST_NUV_DEMUX_START:

   941       res = gst_nuv_demux_stream_file_header (nuv);

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

   943         goto pause;

   944       }

   945       break;

   947     case GST_NUV_DEMUX_HEADER_DATA:

   948       res = gst_nuv_demux_stream_header_data (nuv);

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

   950         goto pause;

   951       }

   952       break;

   954     case GST_NUV_DEMUX_EXTRA_DATA:

   955       res = gst_nuv_demux_stream_extra_data (nuv);

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

   957         goto pause;

   958       }

   959       break;

   961     case GST_NUV_DEMUX_MPEG_DATA:

   962       res = gst_nuv_demux_stream_mpeg_data (nuv);

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

   964         goto pause;

   965       }

   966       break;

   968     case GST_NUV_DEMUX_EXTEND_HEADER:

   969       res = gst_nuv_demux_stream_extend_header (nuv);

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

   971         goto pause;

   972       }

   973       break;

   975     case GST_NUV_DEMUX_EXTEND_HEADER_DATA:

   976       res = gst_nuv_demux_stream_extend_header_data (nuv);

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

   978         goto pause;

   979       }

   980       break;

   982     case GST_NUV_DEMUX_FRAME_HEADER:

   983       res = gst_nuv_demux_read_head_frame (nuv);

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

   985         goto pause;

   986       }

   987       break;

   989     case GST_NUV_DEMUX_MOVI:

   990       res = gst_nuv_demux_stream_data (nuv);

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

   992         goto pause;

   993       }

   994       break;

   996     case GST_NUV_DEMUX_INVALID_DATA:

   997       goto pause;

   998       break;

   999     default:

  1000       g_assert_not_reached ();

  1001   }

  1003   GST_DEBUG_OBJECT (nuv, "state: %d res:%s", nuv->priv->state, gst_flow_get_name (res));

  1005   return GST_FLOW_OK;

  1007 pause:

  1008   GST_LOG_OBJECT (nuv, "pausing task, reason %s", gst_flow_get_name (res));

  1009   gst_pad_pause_task (nuv->priv->sinkpad);

  1010   if (GST_FLOW_IS_FATAL (res)) {

  1011     GST_ELEMENT_ERROR (nuv, STREAM, FAILED,

  1012         (_("Internal data stream error.")),

  1013         ("streaming stopped, reason %s", gst_flow_get_name (res)));

  1015     gst_nuv_demux_send_eos (nuv);

  1016   }

  1017   return res;

  1018 }

  1020 static void

  1021 gst_nuv_demux_send_eos (GstNuvDemux * nuv)

  1022 {

  1023   gst_element_post_message (GST_ELEMENT (nuv),

  1024       gst_message_new_segment_done (GST_OBJECT (nuv), GST_FORMAT_TIME, -1));

  1026   if (nuv->priv->src_video_pad)

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

  1028   if (nuv->priv->src_audio_pad)

  1029     gst_pad_push_event (nuv->priv->src_audio_pad, gst_event_new_eos ());

  1030 }

  1032 static GstFlowReturn

  1033 gst_nuv_demux_read_bytes (GstNuvDemux * nuv, guint64 size, gboolean move,

  1034     GstBuffer ** buffer)

  1035 {

  1036   GstFlowReturn ret = GST_FLOW_OK;

  1038   if (size == 0) {

  1039     return ret;

  1040   }

  1042   if (nuv->priv->mode == NUV_PULL_MODE) {

  1043     ret = gst_pad_pull_range (nuv->priv->sinkpad, nuv->priv->offset, size, buffer);

  1044     if (ret == GST_FLOW_OK) {

  1045         if (move) {

  1046 		    nuv->priv->offset += size;

  1047 		}

  1048       /* got eos */

  1049     } else if (ret == GST_FLOW_UNEXPECTED) {

  1050       if (buffer != NULL)

  1051           gst_buffer_unref (buffer);

  1053       gst_nuv_demux_send_eos (nuv);

  1054       return GST_FLOW_WRONG_STATE;

  1055     }

  1056   } else {

  1057     if (gst_adapter_available (nuv->priv->adapter) < size)

  1058       return GST_FLOW_ERROR_NO_DATA;

  1060     if (move) {

  1061       *buffer = gst_nuv_demux_adapter_take_buffer (nuv->priv->adapter, size);

  1062     } else {

  1063       guint8 *data = NULL;

  1064       data = (guint8 *) gst_adapter_peek (nuv->priv->adapter, size);

  1065       *buffer = gst_buffer_new ();

  1066       gst_buffer_set_data (*buffer, data, size);

  1067     }

  1068   }

  1069   return ret;

  1070 }

  1072 static gboolean

  1073 gst_nuv_demux_sink_activate (GstPad * sinkpad)

  1074 {

  1075   gboolean res = TRUE;

  1076   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (sinkpad));

  1078   if (gst_pad_check_pull_range (sinkpad)) {

  1079     res = gst_pad_activate_pull (sinkpad, TRUE);

  1080   } else {

  1081     res = gst_pad_activate_push (sinkpad, TRUE);

  1082   }

  1084   g_object_unref (nuv);

  1085   return res;

  1086 }

  1088 static gboolean

  1089 gst_nuv_demux_sink_activate_pull (GstPad * sinkpad, gboolean active)

  1090 {

  1091   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (sinkpad));

  1093   if (active) {

  1094     GST_DEBUG_OBJECT (nuv, "activating pull function");

  1095     nuv->priv->mode = NUV_PULL_MODE;

  1096     if (nuv->priv->adapter) {

  1097       gst_adapter_clear (nuv->priv->adapter);

  1098       g_object_unref (nuv->priv->adapter);

  1099       nuv->priv->adapter = NULL;

  1100     }

  1101     gst_pad_start_task (sinkpad, (GstTaskFunction) gst_nuv_demux_loop, sinkpad);

  1102   } else {

  1103     GST_DEBUG_OBJECT (nuv, "deactivating pull function");

  1104     gst_pad_stop_task (sinkpad);

  1105   }

  1106   gst_object_unref (nuv);

  1108   return TRUE;

  1109 }

  1111 static gboolean

  1112 gst_nuv_demux_sink_activate_push (GstPad * pad, gboolean active)

  1113 {

  1114   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

  1117   if (active) {

  1118     GST_DEBUG_OBJECT (nuv, "activating push/chain function");

  1119   } else {

  1120     GST_DEBUG_OBJECT (nuv, "deactivating push/chain function");

  1121   }

  1123   gst_object_unref (nuv);

  1125   return TRUE;

  1126 }

  1129 static gboolean

  1130 gst_nuv_demux_sink_event (GstPad *pad, GstEvent *event)

  1131 {

  1132   gboolean res;

  1133   GstNuvDemux *nuv;

  1135   nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

  1137   switch (GST_EVENT_TYPE (event)) {

  1138     case GST_EVENT_SEEK:

  1139     {

  1140       gdouble rate;

  1141       GstFormat format;

  1142       GstSeekFlags flags;

  1143       GstSeekType cur_type;

  1144       gint64 cur;

  1145       GstSeekType stop_type;

  1146       gint64 stop;

  1148       gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &cur, &stop_type, &stop);

  1149       GST_DEBUG_OBJECT (nuv, "got seek, start %" G_GINT64_FORMAT ", stop %" G_GINT64_FORMAT, cur, stop);

  1150       break;

  1151     }

  1152     case GST_EVENT_NEWSEGMENT:

  1153     {

  1154       gint64 start, stop, time;

  1155       gdouble rate, arate;

  1156       GstFormat format;

  1157       gboolean update;

  1159       GST_DEBUG_OBJECT (nuv, "got a new segment event");

  1160       gst_event_parse_new_segment (event, &update, &rate, &format, &start, &stop, &time);

  1162       GST_DEBUG_OBJECT (nuv, "got newsegment, start %" G_GINT64_FORMAT ", stop %" G_GINT64_FORMAT, start, stop);

  1163       nuv->priv->duration_bytes = stop - start;

  1164       gst_event_unref (event);

  1165       res = TRUE;

  1166       break;

  1167     }

  1168     case GST_EVENT_QOS:

  1169     {

  1170 /*

  1171       gdouble proportion;

  1172       GstClockTimeDiff diff;

  1173       GstClockTime timestamp;

  1175       gst_event_parse_qos (event, &proportion, &diff, &timestamp);

  1176       if (diff > 0)

  1177         nuv->time_qos = timecode + diff;

  1178       else

  1179         nuv->time_qos = -1;

  1180 */

  1181       break;

  1182     }

  1184     case GST_EVENT_EOS:

  1185     default:

  1186       res = gst_pad_event_default (pad, event);

  1187       break;

  1188   }

  1190   gst_object_unref (nuv);

  1191   return res;

  1192 }

  1194 static GstFlowReturn

  1195 gst_nuv_demux_chain (GstPad * pad, GstBuffer * buf)

  1196 {

  1197   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

  1199   GST_DEBUG_OBJECT (nuv, " gst_nuv_demux_chain function");

  1200   gst_adapter_push (nuv->priv->adapter, buf);

  1202   gst_object_unref (nuv);

  1203   //gst_buffer_unref (buf);

  1205   return gst_nuv_demux_play (pad);

  1206 }

  1208 static void

  1209 gst_nuv_demux_loop (GstPad * pad)

  1210 {

  1211   gst_nuv_demux_play (pad);

  1212 }

  1214 static void

  1215 gst_nuv_demux_reset (GstNuvDemux * nuv)

  1216 {

  1217   nuv->priv->state = GST_NUV_DEMUX_START;

  1218   nuv->priv->mode = 0;

  1219   nuv->priv->offset = 0;

  1220   nuv->priv->streamer_offset = 0;

  1221   nuv->priv->time_start = 0;

  1222   nuv->priv->time_qos = GST_CLOCK_TIME_NONE;

  1223   nuv->priv->duration_bytes = GST_CLOCK_TIME_NONE;

  1224   nuv->priv->duration_time = GST_CLOCK_TIME_NONE;

  1225   nuv->priv->duration_average = GST_CLOCK_TIME_NONE;

  1226   gst_segment_init (&nuv->priv->segment, GST_FORMAT_TIME);

  1228   if (nuv->priv->adapter != NULL)

  1229     gst_adapter_clear (nuv->priv->adapter);

  1231   if (nuv->priv->mpeg_buffer != NULL) {

  1232     gst_buffer_unref (nuv->priv->mpeg_buffer);

  1233     nuv->priv->mpeg_buffer = NULL;

  1234   }

  1235 }

  1237 static void

  1238 gst_nuv_demux_destoy_src_pad (GstNuvDemux * nuv)

  1239 {

  1240   if (nuv->priv->src_video_pad) {

  1241     gst_element_remove_pad (GST_ELEMENT (nuv), nuv->priv->src_video_pad);

  1242     nuv->priv->src_video_pad = NULL;

  1243   }

  1245   if (nuv->priv->src_audio_pad) {

  1246     gst_element_remove_pad (GST_ELEMENT (nuv), nuv->priv->src_audio_pad);

  1247     nuv->priv->src_audio_pad = NULL;

  1248   }

  1249 }

  1251 static GstStateChangeReturn

  1252 gst_nuv_demux_change_state (GstElement * element, GstStateChange transition)

  1253 {

  1254   GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;

  1256   switch (transition) {

  1257     case GST_STATE_CHANGE_NULL_TO_READY:

  1258       gst_nuv_demux_reset (GST_NUV_DEMUX (element));

  1259       gst_nuv_demux_destoy_src_pad (GST_NUV_DEMUX (element));

  1260       break;

  1261     default:

  1262       break;

  1263   }

  1265   ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);

  1266   if (ret == GST_STATE_CHANGE_FAILURE) {

  1267     goto done;

  1268   }

  1270   switch (transition) {

  1271     case GST_STATE_CHANGE_READY_TO_NULL:

  1272       gst_nuv_demux_reset (GST_NUV_DEMUX (element));

  1273       gst_nuv_demux_destoy_src_pad (GST_NUV_DEMUX (element));

  1274       break;

  1275     default:

  1276       break;

  1277   }

  1279 done:

  1280   return ret;

  1281 }

  1283 static void

  1284 gst_nuv_demux_update_duration (GstNuvDemux *nuv, guint64 current_timestamp)

  1285 {

  1286     guint64 interval = 0;

  1287     return;

  1289     if (gst_nuv_demux_get_time_duration (nuv) != GST_CLOCK_TIME_NONE)

  1290         return;

  1292     interval  = current_timestamp - nuv->priv->last_update;

  1294     if (interval > (10 * GST_SECOND)) {

  1295         GstMessage* msg = NULL;

  1296         gint64 average = 0;

  1297         gint64 duration_bytes = gst_nuv_demux_get_bytes_duration (nuv);

  1299         if (duration_bytes == GST_CLOCK_TIME_NONE)

  1300             return;

  1302         interval = gst_util_uint64_scale (1, current_timestamp - nuv->priv->time_start, GST_SECOND);

  1303         if (interval > 0) {

  1304             average = gst_util_uint64_scale (1 , nuv->priv->streamer_offset, interval);

  1305         }

  1306         if (average > 0) {

  1307             nuv->priv->duration_average = gst_util_uint64_scale (GST_SECOND, duration_bytes, average);

  1308         }

  1310         nuv->priv->last_update = current_timestamp;

  1311         msg = gst_message_new_duration (GST_OBJECT (nuv), GST_FORMAT_TIME, nuv->priv->duration_average);

  1312         gst_element_post_message (GST_ELEMENT (nuv), msg);

  1313         GST_DEBUG_OBJECT (nuv, "New Duration Average %"G_GUINT64_FORMAT, nuv->priv->duration_average);

  1314     }

  1315 }

  1317 static gint64

  1318 gst_nuv_demux_get_bytes_duration (GstNuvDemux *nuv)

  1319 {

  1320     if (nuv->priv->duration_bytes == GST_CLOCK_TIME_NONE) {

  1321         GstPad *peer = gst_pad_get_peer (nuv->priv->sinkpad);

  1322         GstQuery *query = gst_query_new_duration (GST_FORMAT_BYTES);

  1323         if (gst_pad_query (peer, query)) {

  1324             gint64 duration;

  1326             gst_query_parse_duration (query, NULL, &duration);

  1327             nuv->priv->duration_bytes = duration;

  1328         }

  1329         gst_object_unref (peer);

  1330         gst_query_unref (query);

  1331     }

  1332     return nuv->priv->duration_bytes;

  1333 }

  1335 static gint64

  1336 gst_nuv_demux_get_time_duration (GstNuvDemux *nuv)

  1337 {

  1338     if (nuv->priv->duration_time == GST_CLOCK_TIME_NONE) {

  1339         GstPad *peer = gst_pad_get_peer (nuv->priv->sinkpad);

  1340         GstQuery *query = gst_query_new_duration (GST_FORMAT_TIME);

  1341         if (gst_pad_query (peer, query)) {

  1342             gint64 duration;

  1343             gst_query_parse_duration (query, NULL, &duration);

  1344             nuv->priv->duration_time = duration;

  1345         }

  1346         gst_object_unref (peer);

  1347         gst_query_unref (query);

  1348     }

  1349     return nuv->priv->duration_time;

  1350 }

  1352 GstBuffer *

  1353 gst_nuv_demux_adapter_take_buffer (GstAdapter * adapter, guint nbytes)

  1354 {

  1355   GstBuffer *buffer;

  1356   GstBuffer *cur;

  1357   guint8 *data;

  1359   g_return_val_if_fail (GST_IS_ADAPTER (adapter), NULL);

  1360   g_return_val_if_fail (nbytes > 0, NULL);

  1362   GST_LOG_OBJECT (adapter, "taking buffer of %u bytes", nbytes);

  1364   /* we don't have enough data, return NULL. This is unlikely

  1365    * as one usually does an _available() first instead of peeking a

  1366    * random size. */

  1367   if (G_UNLIKELY (nbytes > adapter->size))

  1368     return NULL;

  1370   /* our head buffer has enough data left, return it */

  1371   cur = adapter->buflist->data;

  1372   if (GST_BUFFER_SIZE (cur) >= nbytes + adapter->skip) {

  1373     GST_LOG_OBJECT (adapter, "providing buffer of %d bytes via sub-buffer",

  1374         nbytes);

  1375     buffer = gst_buffer_create_sub (cur, adapter->skip, nbytes);

  1377     gst_adapter_flush (adapter, nbytes);

  1379     return buffer;

  1380   }

  1382   data = gst_adapter_take (adapter, nbytes);

  1383   if (data == NULL)

  1384     return NULL;

  1386   buffer = gst_buffer_new ();

  1387   GST_BUFFER_DATA (buffer) = data;

  1388   GST_BUFFER_MALLOCDATA (buffer) = data;

  1389   GST_BUFFER_SIZE (buffer) = nbytes;

  1391   return buffer;

  1392 }

  1395 static gboolean

  1396 plugin_init (GstPlugin * plugin)

  1397 {

  1398 #ifdef ENABLE_NLS

  1399   setlocale (LC_ALL, "");

  1400   bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);

  1401 #endif /* ENABLE_NLS */

  1403   if (!gst_element_register (plugin, "nuvdemux", GST_RANK_SECONDARY,

  1404           GST_TYPE_NUV_DEMUX)) {

  1405     return FALSE;

  1406   }

  1407   return TRUE;

  1408 }

  1410 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,

  1411     GST_VERSION_MINOR,

  1412     "nuvdemux",

  1413     "Demuxes and muxes audio and video",

  1414      plugin_init, VERSION, "LGPL", "NuvDemux", "")

author	rosfran
	Sat Dec 02 03:40:20 2006 +0000 (2006-12-02)
branch	trunk
changeset 175	d021c43d190c
parent 172	d591b81268b0
child 181	d9628018e9f7
permissions	-rw-r--r--