gmyth: gst-plugins-mythtv/src/gstmythtvsrc.c@9d4af01c6a2f

     1 /* GStreamer MythTV Plug-in

     2  * Copyright (C) <2006> Rosfran Borges <rosfran.borges@indt.org.br>

     3  *

     4  * This library is free software; you can redistribute it and/or

     5  * modify it under the terms of the GNU Library General Public

     6  * License as published by the Free Software Foundation; either

     7  * version 2 of the License, or (at your option) any later version.

     8  *

     9  * This library is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    12  * Library General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU Library General Public

    15  * License along with this library; if not, write to the

    16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

    17  * Boston, MA 02111-1307, USA.

    18  */

    19 /**

    20  * When using the LiveTV content, put the location URI in the following

    21  * format:

    22  *

    23  * 	myth://mythtv:mythtv@xxx.xxx.xxx.xxx:6543/?mythconverg

    24  *

    25  * Where the first field is the protocol (myth), the second and third are user

    26  * name (mythtv) and password (mythtv), then backend host name and port number,

    27  * and the last field is the database name (mythconverg).

    28  */

    30 #ifdef HAVE_CONFIG_H

    31 #include "config.h"

    32 #endif

    34 #include "gstmythtvsrc.h"

    35 #include <gmyth/gmyth_file_transfer.h>

    36 #include <gmyth/gmyth_livetv.h>

    38 #include <gmyth/gmyth_socket.h>

    39 #include <gmyth/gmyth_tvchain.h>

    41 #include <string.h>

    42 #include <unistd.h>

    44 GST_DEBUG_CATEGORY_STATIC (mythtvsrc_debug);

    45 #define GST_CAT_DEFAULT mythtvsrc_debug

    47 #define GST_GMYTHTV_ID_NUM			            1

    49 #define GST_GMYTHTV_CHANNEL_DEFAULT_NUM		(-1)

    51 #define GMYTHTV_VERSION_DEFAULT			        30

    53 #define GMYTHTV_TRANSFER_MAX_WAITS		     100

    55 #define GMYTHTV_TRANSFER_MAX_RESENDS	       2

    57 #define GMYTHTV_TRANSFER_MAX_BUFFER		(128*1024)

    59 #define MAX_READ_SIZE              		(4*1024)

    61 #define GST_FLOW_ERROR_NO_DATA  			(-101)

    63 #define REQUEST_MAX_SIZE							(64*1024)

    65 #define INTERNAL_BUFFER_SIZE					(90*1024)

    67 static const GstElementDetails gst_mythtv_src_details =

    68 GST_ELEMENT_DETAILS ("MythTV client source",

    69     "Source/Network",

    70     "Control and receive data as a client over the network "

    71     "via raw socket connections using the MythTV protocol",

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

    74 static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",

    75     GST_PAD_SRC,

    76     GST_PAD_ALWAYS,

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

    79 enum

    80 {

    81   PROP_0,

    82   PROP_LOCATION,

    83 #ifndef GST_DISABLE_GST_DEBUG

    84   PROP_GMYTHTV_DBG,

    85 #endif

    86   PROP_GMYTHTV_VERSION,

    87   PROP_GMYTHTV_LIVE,

    88   PROP_GMYTHTV_LIVEID,

    89   PROP_GMYTHTV_LIVE_CHAINID,

    90   PROP_GMYTHTV_ENABLE_TIMING_POSITION,

    91   PROP_GMYTHTV_CHANNEL_NUM

    92 };

    94 static void gst_mythtv_src_finalize (GObject * gobject);

    96 static GstFlowReturn gst_mythtv_src_create (GstPushSrc * psrc,

    97     GstBuffer ** outbuf);

    99 static gboolean gst_mythtv_src_start (GstBaseSrc * bsrc);

   100 static gboolean gst_mythtv_src_stop (GstBaseSrc * bsrc);

   101 static gboolean gst_mythtv_src_get_size (GstBaseSrc * bsrc, guint64 * size);

   102 static gboolean gst_mythtv_src_is_seekable (GstBaseSrc * push_src);

   104 static gboolean gst_mythtv_src_do_seek (GstBaseSrc * base,

   105     GstSegment * segment);

   107 static gboolean gst_mythtv_src_next_program_chain (GstMythtvSrc * src);

   109 static GstStateChangeReturn

   110 gst_mythtv_src_change_state (GstElement * element, GstStateChange transition);

   112 static void gst_mythtv_src_set_property (GObject * object, guint prop_id,

   113     const GValue * value, GParamSpec * pspec);

   114 static void gst_mythtv_src_get_property (GObject * object, guint prop_id,

   115     GValue * value, GParamSpec * pspec);

   117 static void gst_mythtv_src_uri_handler_init (gpointer g_iface,

   118     gpointer iface_data);

   120 static gboolean gst_mythtv_src_handle_query (GstPad * pad, GstQuery * query);

   122 static gboolean gst_mythtv_src_handle_event (GstPad * pad, GstEvent * event);

   124 static gint do_read_request_response (GstMythtvSrc * src, guint size,

   125     GByteArray * data_ptr);

   127 static void

   128 _urihandler_init (GType type)

   129 {

   130   static const GInterfaceInfo urihandler_info = {

   131     gst_mythtv_src_uri_handler_init,

   132     NULL,

   133     NULL

   134   };

   136   g_type_add_interface_static (type, GST_TYPE_URI_HANDLER, &urihandler_info);

   138   GST_DEBUG_CATEGORY_INIT (mythtvsrc_debug, "mythtvsrc", 0, "MythTV src");

   139 }

   141 GST_BOILERPLATE_FULL (GstMythtvSrc, gst_mythtv_src, GstPushSrc,

   142     GST_TYPE_PUSH_SRC, _urihandler_init)

   144      static void gst_mythtv_src_base_init (gpointer g_class)

   145 {

   146   GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);

   148   gst_element_class_add_pad_template (element_class,

   149       gst_static_pad_template_get (&srctemplate));

   151   gst_element_class_set_details (element_class, &gst_mythtv_src_details);

   153   element_class->change_state = gst_mythtv_src_change_state;

   155 }

   157 static void

   158 gst_mythtv_src_class_init (GstMythtvSrcClass * klass)

   159 {

   160   GObjectClass *gobject_class;

   161   GstPushSrcClass *gstpushsrc_class;

   162   GstBaseSrcClass *gstbasesrc_class;

   164   gobject_class = (GObjectClass *) klass;

   165   gstbasesrc_class = (GstBaseSrcClass *) klass;

   166   gstpushsrc_class = (GstPushSrcClass *) klass;

   168   gobject_class->set_property = gst_mythtv_src_set_property;

   169   gobject_class->get_property = gst_mythtv_src_get_property;

   170   gobject_class->finalize = gst_mythtv_src_finalize;

   172   g_object_class_install_property

   173       (gobject_class, PROP_LOCATION,

   174       g_param_spec_string ("location", "Location",

   175           "The location. In the form:"

   176           "\n\t\t\tmyth://a.com/file.nuv"

   177           "\n\t\t\tmyth://a.com:23223/file.nuv "

   178           "\n\t\t\ta.com/file.nuv - default scheme 'myth'",

   179           "", G_PARAM_READWRITE));

   181   g_object_class_install_property

   182       (gobject_class, PROP_GMYTHTV_VERSION,

   183       g_param_spec_int ("mythtv-version", "mythtv-version",

   184           "Change MythTV version", 26, 30, 26, G_PARAM_READWRITE));

   186   g_object_class_install_property

   187       (gobject_class, PROP_GMYTHTV_LIVEID,

   188       g_param_spec_int ("mythtv-live-id", "mythtv-live-id",

   189           "Change MythTV version",

   190           0, 200, GST_GMYTHTV_ID_NUM, G_PARAM_READWRITE));

   192   g_object_class_install_property

   193       (gobject_class, PROP_GMYTHTV_LIVE_CHAINID,

   194       g_param_spec_string ("mythtv-live-chainid", "mythtv-live-chainid",

   195           "Sets the MythTV chain ID (from TV Chain)", "", G_PARAM_READWRITE));

   197   g_object_class_install_property

   198       (gobject_class, PROP_GMYTHTV_LIVE,

   199       g_param_spec_boolean ("mythtv-live", "mythtv-live",

   200           "Enable MythTV Live TV content streaming", FALSE, G_PARAM_READWRITE));

   202   g_object_class_install_property

   203       (gobject_class, PROP_GMYTHTV_ENABLE_TIMING_POSITION,

   204       g_param_spec_boolean ("mythtv-enable-timing-position",

   205           "mythtv-enable-timing-position",

   206           "Enable MythTV Live TV content size continuous updating", FALSE,

   207           G_PARAM_READWRITE));

   209   g_object_class_install_property

   210       (gobject_class, PROP_GMYTHTV_CHANNEL_NUM,

   211       g_param_spec_int ("mythtv-channel", "mythtv-channel",

   212           "Change MythTV channel number",

   213           -1, 99999, GST_GMYTHTV_CHANNEL_DEFAULT_NUM, G_PARAM_READWRITE));

   215 #ifndef GST_DISABLE_GST_DEBUG

   216   g_object_class_install_property

   217       (gobject_class, PROP_GMYTHTV_DBG,

   218       g_param_spec_boolean ("mythtv-debug", "mythtv-debug",

   219           "Enable MythTV debug messages", FALSE, G_PARAM_READWRITE));

   220 #endif

   222   gstbasesrc_class->start = gst_mythtv_src_start;

   223   gstbasesrc_class->stop = gst_mythtv_src_stop;

   224   gstbasesrc_class->get_size = gst_mythtv_src_get_size;

   225   gstbasesrc_class->is_seekable = gst_mythtv_src_is_seekable;

   227   gstbasesrc_class->do_seek = gst_mythtv_src_do_seek;

   228   gstpushsrc_class->create = gst_mythtv_src_create;

   230   GST_DEBUG_CATEGORY_INIT (mythtvsrc_debug, "mythtvsrc", 0,

   231       "MythTV Client Source");

   232 }

   234 static void

   235 gst_mythtv_src_init (GstMythtvSrc * this, GstMythtvSrcClass * g_class)

   236 {

   237   this->file_transfer = NULL;

   239   this->unique_setup = FALSE;

   241   this->mythtv_version = GMYTHTV_VERSION_DEFAULT;

   243   this->state = GST_MYTHTV_SRC_FILE_TRANSFER;

   245   this->bytes_read = 0;

   247   this->prev_content_size = 0;

   249   this->content_size = 0;

   250   this->read_offset = 0;

   252   this->content_size_last = 0;

   254   this->live_tv = FALSE;

   256   this->enable_timing_position = FALSE;

   257   this->update_prog_chain = FALSE;

   259   this->user_agent = g_strdup ("mythtvsrc");

   260   this->mythtv_caps = NULL;

   261   this->update_prog_chain = FALSE;

   263   this->channel_num = GST_GMYTHTV_CHANNEL_DEFAULT_NUM;

   265   this->eos = FALSE;

   267   this->bytes_queue = NULL;

   269   this->wait_to_transfer = 0;

   271   gst_base_src_set_format (GST_BASE_SRC (this), GST_FORMAT_BYTES);

   273   gst_pad_set_event_function (GST_BASE_SRC_PAD (GST_BASE_SRC (this)),

   274       gst_mythtv_src_handle_event);

   275   gst_pad_set_query_function (GST_BASE_SRC_PAD (GST_BASE_SRC (this)),

   276       gst_mythtv_src_handle_query);

   278 }

   280 static void

   281 gst_mythtv_src_finalize (GObject * gobject)

   282 {

   283   GstMythtvSrc *this = GST_MYTHTV_SRC (gobject);

   285   if (this->mythtv_caps) {

   286     gst_caps_unref (this->mythtv_caps);

   287     this->mythtv_caps = NULL;

   288   }

   290   if (this->file_transfer) {

   291     g_object_unref (this->file_transfer);

   292     this->file_transfer = NULL;

   293   }

   295   if (this->spawn_livetv) {

   296     g_object_unref (this->spawn_livetv);

   297     this->spawn_livetv = NULL;

   298   }

   300   if (this->backend_info) {

   301     g_object_unref (this->backend_info);

   302     this->backend_info = NULL;

   303   }

   305   if (this->uri_name) {

   306     g_free (this->uri_name);

   307   }

   309   if (this->user_agent) {

   310     g_free (this->user_agent);

   311   }

   313   if (this->bytes_queue) {

   314     g_byte_array_free (this->bytes_queue, TRUE);

   315     this->bytes_queue = NULL;

   316   }

   318   G_OBJECT_CLASS (parent_class)->finalize (gobject);

   319 }

   321 static gint

   322 do_read_request_response (GstMythtvSrc * src, guint size, GByteArray * data_ptr)

   323 {

   324   gint read = 0;

   325   guint sizetoread = size;

   326   gint max_iters = GMYTHTV_TRANSFER_MAX_RESENDS;

   328   GST_LOG_OBJECT (src, "Starting: Reading %d bytes...", sizetoread);

   330   /* Loop sending the Myth File Transfer request:

   331    * Retry whilst authentication fails and we supply it. */

   332   gint len = 0;

   334   while (sizetoread == size && --max_iters > 0) {

   336     len = gmyth_file_transfer_read (src->file_transfer,

   337         data_ptr, sizetoread, TRUE);

   339     if (len > 0) {

   340       read += len;

   341       sizetoread -= len;

   342     } else if (len < 0) {

   344       if (src->live_tv == FALSE) {

   345         read = -1;

   346         goto eos;

   347       } else {

   348         if (len == GMYTHTV_FILE_TRANSFER_READ_ERROR) {  /* -314 */

   349           GST_INFO_OBJECT (src, "[LiveTV] FileTransfer READ_ERROR!");

   350           goto done;

   351         } else if (len == GMYTHTV_FILE_TRANSFER_NEXT_PROG_CHAIN) {      /* -315 */

   352           GST_INFO_OBJECT (src,

   353               "[LiveTV] FileTransfer - Go to the next program chain!");

   354           continue;

   355         }

   356         goto done;

   357       }

   359     } else if (len == 0)

   360       goto done;

   362     if (read == sizetoread)

   363       goto done;

   364   }

   366   if ((read < 0 && !src->live_tv) || max_iters == 0)

   367     goto eos;

   369   goto done;

   371 eos:

   372   src->eos = TRUE;

   374 done:

   375   return read;

   376 }

   378 static GstFlowReturn

   379 gst_mythtv_src_create (GstPushSrc * psrc, GstBuffer ** outbuf)

   380 {

   381   GstMythtvSrc *src;

   382   GstFlowReturn ret = GST_FLOW_OK;

   383   gint read = -1;

   385   src = GST_MYTHTV_SRC (psrc);

   387   /* The caller should know the number of bytes and not read beyond EOS. */

   388   if (G_UNLIKELY (src->eos))

   389     goto eos;

   390   if (G_UNLIKELY (src->update_prog_chain))

   391     goto change_progchain;

   393   GST_DEBUG_OBJECT (src, "offset = %" G_GUINT64_FORMAT ", size = %d...",

   394       src->read_offset, MAX_READ_SIZE);

   396   GST_DEBUG_OBJECT (src, "Create: buffer_remain: %d, buffer_size = %d.",

   397       (gint) src->buffer_remain, src->bytes_queue->len);

   399   /* just get from the byte array, no network effort... */

   400   if ((src->buffer_remain = src->bytes_queue->len) < MAX_READ_SIZE) {

   401     GByteArray *buffer = NULL;

   402     guint buffer_size_inter = (INTERNAL_BUFFER_SIZE - src->buffer_remain);

   404     if (buffer_size_inter > REQUEST_MAX_SIZE)

   405       buffer_size_inter = REQUEST_MAX_SIZE;

   407     buffer = g_byte_array_new ();

   409     read = do_read_request_response (src, buffer_size_inter, buffer);

   411     if (G_UNLIKELY (read < 0)) {

   412       if (src->live_tv)

   413         goto change_progchain;

   414       else

   415         goto read_error;

   416     } else if (G_UNLIKELY (read == 0)) {

   417       if (!src->live_tv)

   418         goto done;

   419       else

   420         goto change_progchain;

   421     }

   423     if (G_UNLIKELY (src->update_prog_chain))

   424       goto change_progchain;

   426     src->bytes_queue =

   427         g_byte_array_append (src->bytes_queue, buffer->data, read);

   428     if (read > buffer_size_inter)

   429       GST_WARNING_OBJECT (src,

   430           "INCREASED buffer size! Backend sent more than we ask him... (%d)",

   431           abs (read - buffer_size_inter));

   433     src->buffer_remain += read;

   435     if (buffer != NULL) {

   436       g_byte_array_free (buffer, TRUE);

   437       buffer = NULL;

   438     }

   440     GST_DEBUG_OBJECT (src,

   441         "BYTES READ (actual) = %d, BYTES READ (cumulative) = %llu, "

   442         "OFFSET = %llu, CONTENT SIZE = %llu.", read,

   443         src->bytes_read, src->read_offset, src->content_size);

   445   }

   447   guint buffer_size =

   448       (src->buffer_remain < MAX_READ_SIZE) ? src->buffer_remain : MAX_READ_SIZE;

   450   *outbuf = gst_buffer_new ();

   452   /* gets the first buffer_size bytes from the byte array buffer variable */

   453   /* guint8 *buf = g_memdup( src->bytes_queue->data, buffer_size ); */

   455   GST_DEBUG_OBJECT (src, "read from network? %s!, buffer_remain = %d",

   456       (read ==

   457           -1) ? "NO, got from buffer" : "YES, go see the backend's log file",

   458       src->buffer_remain);

   460   GST_BUFFER_SIZE (*outbuf) = buffer_size;

   461   GST_BUFFER_MALLOCDATA (*outbuf) = g_malloc0 (GST_BUFFER_SIZE (*outbuf));

   462   GST_BUFFER_DATA (*outbuf) = GST_BUFFER_MALLOCDATA (*outbuf);

   463   g_memmove (GST_BUFFER_DATA ((*outbuf)), src->bytes_queue->data,

   464       GST_BUFFER_SIZE (*outbuf));

   465   GST_BUFFER_OFFSET (*outbuf) = src->read_offset;

   466   GST_BUFFER_OFFSET_END (*outbuf) =

   467       src->read_offset + GST_BUFFER_SIZE (*outbuf);

   469   src->buffer_remain -= GST_BUFFER_SIZE (*outbuf);

   471   src->read_offset += GST_BUFFER_SIZE (*outbuf);

   472   src->bytes_read += GST_BUFFER_SIZE (*outbuf);

   473   GST_DEBUG_OBJECT (src, "Buffer output with size: %d",

   474       GST_BUFFER_SIZE (*outbuf));

   476   /* flushs the newly buffer got from byte array */

   477   src->bytes_queue =

   478       g_byte_array_remove_range (src->bytes_queue, 0, buffer_size);

   480   GST_DEBUG_OBJECT (src, "Got buffer: BUFFER --->SIZE = %d, OFFSET = %llu, "

   481       "OFFSET_END = %llu.", GST_BUFFER_SIZE (*outbuf),

   482       GST_BUFFER_OFFSET (*outbuf), GST_BUFFER_OFFSET_END (*outbuf));

   484   GST_DEBUG_OBJECT (src, "CONTENT_SIZE = %llu, BYTES_READ = %llu.",

   485       src->content_size, src->bytes_read);

   487   if (G_UNLIKELY (src->eos) || (!src->live_tv

   488           && (src->bytes_read >= src->content_size)))

   489     goto eos;

   491 done:

   492   {

   493     const gchar *reason = gst_flow_get_name (ret);

   495     GST_DEBUG_OBJECT (src, "DONE task, reason %s", reason);

   496     return ret;

   497   }

   498 eos:

   499   {

   500     const gchar *reason = gst_flow_get_name (ret);

   502     GST_DEBUG_OBJECT (src, "pausing task, reason %s", reason);

   503     return GST_FLOW_UNEXPECTED;

   504   }

   505   /* ERRORS */

   506 read_error:

   507   {

   508     GST_ELEMENT_ERROR (src, RESOURCE, READ,

   509         (NULL), ("Could not read any bytes (%i, %s)", read, src->uri_name));

   510     return GST_FLOW_ERROR;

   511   }

   512 change_progchain:

   513   {

   514     GST_ELEMENT_ERROR (src, RESOURCE, READ,

   515         (NULL), ("Seek failed, go to the next program info... (%i, %s)", read,

   516             src->uri_name));

   518     gst_pad_push_event (GST_BASE_SRC_PAD (GST_BASE_SRC (psrc)),

   519         gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0, -1, 0));

   521     /* go to the next program chain */

   522     src->unique_setup = FALSE;

   523     src->update_prog_chain = TRUE;

   525     gst_mythtv_src_next_program_chain (src);

   527     return GST_FLOW_ERROR_NO_DATA;

   528   }

   530 }

   532 gint64

   533 gst_mythtv_src_get_position (GstMythtvSrc * src)

   534 {

   536   gint64 size_tmp = 0;

   537   guint max_tries = 2;

   539   if (src->live_tv == TRUE && (abs (src->content_size - src->bytes_read) <

   540           GMYTHTV_TRANSFER_MAX_BUFFER)) {

   542   get_file_pos:

   543     g_usleep (10);

   544     size_tmp = gmyth_recorder_get_file_position (src->spawn_livetv->recorder);

   545     if (size_tmp > (src->content_size + GMYTHTV_TRANSFER_MAX_BUFFER))

   546       src->content_size = size_tmp;

   547     else if (size_tmp > 0 && --max_tries > 0)

   548       goto get_file_pos;

   549     GST_LOG_OBJECT (src, "GET_POSITION: file_position = %lld", size_tmp);

   550     /* sets the last content size amount before it can be updated */

   551     src->prev_content_size = src->content_size;

   552   }

   554   return src->content_size;

   556 }

   558 static gboolean

   559 gst_mythtv_src_do_seek (GstBaseSrc * base, GstSegment * segment)

   560 {

   561   GstMythtvSrc *src = GST_MYTHTV_SRC (base);

   562   gint64 new_offset = -1;

   563   gint64 actual_seek = segment->start;

   564   gboolean ret = TRUE;

   566   GST_LOG_OBJECT (src, "seek, segment: %" GST_SEGMENT_FORMAT, segment);

   568   if (segment->format == GST_FORMAT_TIME) {

   569     goto done;

   570   }

   571   GST_LOG_OBJECT (src,

   572       "Trying to seek at the value (actual_seek = %lld, read_offset = %lld)",

   573       actual_seek, src->read_offset);

   574   /* verify if it needs to seek */

   575   if (src->read_offset != actual_seek) {

   577     new_offset =

   578         gmyth_file_transfer_seek (src->file_transfer, segment->start, SEEK_SET);

   580     GST_LOG_OBJECT (src,

   581         "Segment offset start = %lld, SRC Offset = %lld, NEW actual backend SEEK Offset = %lld.",

   582         segment->start, src->read_offset, new_offset);

   583     if (G_UNLIKELY (new_offset < 0)) {

   584       ret = FALSE;

   585       if (src->live_tv)

   586         goto change_progchain;

   587       else

   588         goto eos;

   589     }

   591     src->read_offset = new_offset;

   593     if (ret == FALSE) {

   594       GST_INFO_OBJECT (src, "Failed to set the SEEK on segment!");

   595     }

   597   }

   599 done:

   600   return ret;

   602 eos:

   603   {

   605     GST_DEBUG_OBJECT (src, "EOS found on seeking!!!");

   606     return FALSE;

   607   }

   608 change_progchain:

   609   {

   610     GST_ELEMENT_ERROR (src, RESOURCE, READ,

   611         (NULL), ("Seek failed, go to the next program info... (%i, %s)", read,

   612             src->uri_name));

   614     gst_pad_push_event (GST_BASE_SRC_PAD (base),

   615         gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0, -1, 0));

   616     /* go to the next program chain */

   617     src->unique_setup = FALSE;

   618     src->update_prog_chain = TRUE;

   620     gst_mythtv_src_next_program_chain (src);

   622     return TRUE;

   623   }

   625 }

   627 /* create a socket for connecting to remote server */

   628 static gboolean

   629 gst_mythtv_src_start (GstBaseSrc * bsrc)

   630 {

   631   GstMythtvSrc *src = GST_MYTHTV_SRC (bsrc);

   633   GString *chain_id_local = NULL;

   634   GMythURI *gmyth_uri = NULL;

   635   gboolean ret = TRUE;

   637   if (G_UNLIKELY (src->update_prog_chain))

   638     goto change_progchain;

   640   if (src->unique_setup == FALSE) {

   641     src->unique_setup = TRUE;

   642   } else {

   643     goto done;

   644   }

   646   gmyth_uri = gmyth_uri_new_with_value( src->uri_name );

   648   src->backend_info = gmyth_backend_info_new_with_uri (src->uri_name);

   649   src->live_tv |= gmyth_uri_is_livetv( gmyth_uri );

   650   /* testing UPnP... */

   651   /* gmyth_backend_info_set_hostname( src->backend_info, NULL ); */

   652   if ( src->live_tv ) {

   653     src->spawn_livetv = gmyth_livetv_new ();

   655     gint ch = gmyth_uri_get_channel_num( gmyth_uri );

   656     if ( ch != -1 )

   657     	src->channel_num = ch;

   659     if (src->channel_num != GST_GMYTHTV_CHANNEL_DEFAULT_NUM) {

   660       if (gmyth_livetv_channel_setup (src->spawn_livetv, src->channel_num,

   661               src->backend_info) == FALSE) {

   662         GST_INFO_OBJECT (src, "LiveTV setup felt down on error");

   663         ret = FALSE;

   664         goto init_failed;

   665       }

   666     } else {

   667       if (gmyth_livetv_setup (src->spawn_livetv, src->backend_info) == FALSE) {

   668         GST_INFO_OBJECT (src, "LiveTV setup felt down on error");

   669         ret = FALSE;

   670         goto init_failed;

   671       }

   672     }

   674     src->file_transfer = gmyth_livetv_create_file_transfer (src->spawn_livetv);

   676     if (NULL == src->file_transfer) {

   677       GST_INFO_OBJECT (src, "[LiveTV] FileTransfer equals to NULL");

   678       ret = FALSE;

   679       goto init_failed;

   680     }

   681   } else {

   683     src->file_transfer = gmyth_file_transfer_new (src->backend_info);

   685     ret = gmyth_file_transfer_open (src->file_transfer, src->uri_name);

   687   }

   689   if (NULL == src->file_transfer) {

   690     GST_INFO_OBJECT (src, "FileTransfer is NULL");

   691     goto init_failed;

   692   }

   693   /*GST_INFO_OBJECT( src, "uri = %s", src->spawn_livetv->file_transfer); */

   695   if (ret == FALSE) {

   696 #ifndef GST_DISABLE_GST_DEBUG

   697     if (src->mythtv_msgs_dbg)

   698       GST_INFO_OBJECT (src,

   699           "MythTV FileTransfer request failed when setting up socket connection!");

   700 #endif

   701     goto begin_req_failed;

   702   }

   704   GST_INFO_OBJECT (src,

   705       "MythTV FileTransfer filesize = %lld, content_size = %lld!",

   706       src->file_transfer->filesize, src->content_size);

   708   src->content_size = src->file_transfer->filesize;

   710   src->do_start = FALSE;

   712   /* this is used for the buffer cache */

   713   src->bytes_queue = g_byte_array_sized_new (INTERNAL_BUFFER_SIZE);

   714   src->buffer_remain = 0;

   716   gst_pad_push_event (GST_BASE_SRC_PAD (GST_BASE_SRC (src)),

   717       gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0,

   718           src->content_size, 0));

   720 done:

   721 	/*if ( gmyth_uri != NULL )

   722 	{

   723   	g_object_unref( gmyth_uri );

   724   	gmyth_uri = NULL;

   725 	}*/

   727   if (chain_id_local != NULL) {

   728     g_string_free (chain_id_local, TRUE);

   729     chain_id_local = NULL;

   730   }

   732   return TRUE;

   734   /* ERRORS */

   735 init_failed:

   736   {

   737     if (src->spawn_livetv != NULL)

   738       g_object_unref (src->spawn_livetv);

   740     GST_ELEMENT_ERROR (src, LIBRARY, INIT,

   741         (NULL), ("Could not initialize MythTV library (%i, %s)", ret,

   742             src->uri_name));

   743     return FALSE;

   744   }

   745 begin_req_failed:

   746   {

   747     GST_ELEMENT_ERROR (src, LIBRARY, INIT,

   748         (NULL), ("Could not begin request sent to MythTV server (%i, %s)", ret,

   749             src->uri_name));

   750     return FALSE;

   751   }

   752 change_progchain:

   753   {

   754     GST_ELEMENT_ERROR (src, RESOURCE, READ,

   755         (NULL), ("Seek failed, go to the next program info... (%s)",

   756             src->uri_name));

   758     gst_pad_push_event (GST_BASE_SRC_PAD (GST_BASE_SRC (src)),

   759         gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_TIME, 0, -1, 0));

   761     /* go to the next program chain */

   762     src->unique_setup = FALSE;

   763     src->update_prog_chain = TRUE;

   765     gst_mythtv_src_next_program_chain (src);

   767     return TRUE;

   768   }

   769 }

   771 /* create a new socket for connecting to the next program chain */

   772 static gboolean

   773 gst_mythtv_src_next_program_chain (GstMythtvSrc * src)

   774 {

   775   gboolean ret = TRUE;

   777   if (!src->live_tv)

   778     goto init_failed;

   780   if (src->unique_setup == FALSE) {

   781     src->unique_setup = TRUE;

   782   } else {

   783     goto done;

   784   }

   786   GST_PAD_STREAM_LOCK (GST_BASE_SRC_PAD (GST_BASE_SRC (src)));

   788   if (src->file_transfer) {

   789     g_object_unref (src->file_transfer);

   790     src->file_transfer = NULL;

   791   }

   793   if (src->uri_name) {

   794     g_free (src->uri_name);

   795   }

   797   if (src->backend_info == NULL)

   798     src->backend_info = gmyth_backend_info_new_with_uri (src->uri_name);

   800   if (src->live_tv) {

   801     if (gmyth_livetv_next_program_chain (src->spawn_livetv) == FALSE) {

   802       GST_INFO_OBJECT (src, "Failed to go to the next program chain!");

   803       ret = FALSE;

   804       goto init_failed;

   805     }

   806     /* set up the uri variable */

   807     src->uri_name = g_strdup (src->spawn_livetv->proginfo->pathname->str);

   809     src->file_transfer = gmyth_livetv_create_file_transfer (src->spawn_livetv);

   810   } else {

   812 	  src->file_transfer = gmyth_file_transfer_new (src->backend_info);

   814 	  if (src->file_transfer == NULL) {

   815 	    goto init_failed;

   816 	  }

   818 	  ret = gmyth_file_transfer_open (src->file_transfer, src->uri_name);

   819   }

   821   if (ret == FALSE) {

   822 #ifndef GST_DISABLE_GST_DEBUG

   823     if (src->mythtv_msgs_dbg)

   824       GST_ERROR_OBJECT (src,

   825           "MythTV FileTransfer request failed when setting up socket connection!");

   826 #endif

   827     goto begin_req_failed;

   828   }

   829   src->content_size_last = src->content_size;

   831   src->content_size = src->file_transfer->filesize;

   832   if (src->live_tv) {

   833   	/*

   834     src->wait_to_transfer = 0;

   835     while (src->wait_to_transfer++ < GMYTHTV_TRANSFER_MAX_WAITS &&

   836         src->content_size < GMYTHTV_TRANSFER_MAX_BUFFER)

   837       src->content_size = gst_mythtv_src_get_position (src);

   838     */

   839   }

   841   src->read_offset = 0;

   843   if (src->bytes_queue != NULL) {

   844     g_byte_array_free (src->bytes_queue, TRUE);

   845   }

   847   src->bytes_queue = g_byte_array_sized_new (INTERNAL_BUFFER_SIZE);

   849 done:

   850   src->update_prog_chain = FALSE;

   852   GST_PAD_STREAM_UNLOCK (GST_BASE_SRC_PAD (GST_BASE_SRC (src)));

   854   return TRUE;

   856   /* ERRORS */

   857 init_failed:

   858   {

   859     if (src->spawn_livetv != NULL)

   860       g_object_unref (src->spawn_livetv);

   862     GST_ELEMENT_ERROR (src, LIBRARY, INIT,

   863         (NULL), ("Could not initialize MythTV library (%i, %s)", ret,

   864             src->uri_name));

   865     return FALSE;

   866   }

   867 begin_req_failed:

   868   {

   869     GST_ELEMENT_ERROR (src, LIBRARY, INIT,

   870         (NULL), ("Could not begin request sent to MythTV server (%i, %s)", ret,

   871             src->uri_name));

   872     return FALSE;

   873   }

   875 }

   877 static gboolean

   878 gst_mythtv_src_get_size (GstBaseSrc * bsrc, guint64 * size)

   879 {

   880   GstMythtvSrc *src = GST_MYTHTV_SRC (bsrc);

   881   gboolean ret = TRUE;

   883   GST_LOG_OBJECT (src, "Differs from previous content size: %d (max.: %d)",

   884       abs (src->content_size - src->prev_content_size),

   885       GMYTHTV_TRANSFER_MAX_BUFFER);

   887   if (src->live_tv) {

   888     ret = FALSE;

   889   } else if (src->live_tv && src->enable_timing_position

   890       && (abs (src->content_size - src->bytes_read) <

   891           GMYTHTV_TRANSFER_MAX_BUFFER)) {

   893     gint64 new_offset =

   894         gmyth_recorder_get_file_position (src->spawn_livetv->recorder);

   895     if (new_offset > 0 && new_offset > src->content_size) {

   896       src->content_size = new_offset;

   897     } else if (new_offset < src->content_size) {

   898       src->update_prog_chain = TRUE;

   899     }

   901   }

   903   *size = src->content_size;

   904   GST_LOG_OBJECT (src, "Content size = %lld", src->content_size);

   906   return ret;

   908 }

   910 /* close the socket and associated resources

   911  * used both to recover from errors and go to NULL state */

   912 static gboolean

   913 gst_mythtv_src_stop (GstBaseSrc * bsrc)

   914 {

   915   GstMythtvSrc *src;

   917   src = GST_MYTHTV_SRC (bsrc);

   919   if (src->uri_name) {

   920     g_free (src->uri_name);

   921     src->uri_name = NULL;

   922   }

   924   if (src->mythtv_caps) {

   925     gst_caps_unref (src->mythtv_caps);

   926     src->mythtv_caps = NULL;

   927   }

   929   src->eos = FALSE;

   931   return TRUE;

   932 }

   934 static gboolean

   935 gst_mythtv_src_handle_event (GstPad * pad, GstEvent * event)

   936 {

   937   GstMythtvSrc *src = GST_MYTHTV_SRC (GST_PAD_PARENT (pad));

   938   gint64 cont_size = 0;

   939   gboolean ret = FALSE;

   941   switch (GST_EVENT_TYPE (event)) {

   942     case GST_EVENT_EOS:

   943       GST_WARNING_OBJECT (src, "Got EOS event");

   945       if (src->live_tv) {

   946         cont_size = gst_mythtv_src_get_position (src);

   947         if (cont_size > src->content_size) {

   948           src->content_size = cont_size;

   949           src->eos = FALSE;

   950         } else {

   951           src->eos = TRUE;

   952           gst_element_set_state (GST_ELEMENT (src), GST_STATE_NULL);

   953           gst_element_set_locked_state (GST_ELEMENT (src), FALSE);

   954         }

   955       }

   956       break;

   957     default:

   958       ret = gst_pad_event_default (pad, event);

   959   }

   961   return ret;

   962 }

   964 static gboolean

   965 gst_mythtv_src_is_seekable (GstBaseSrc * push_src)

   966 {

   967   return TRUE;

   968 }

   970 static gboolean

   971 gst_mythtv_src_handle_query (GstPad * pad, GstQuery * query)

   972 {

   973   gboolean res = FALSE;

   974   GstMythtvSrc *myth = GST_MYTHTV_SRC (gst_pad_get_parent (pad));

   975   GstFormat formt;

   977   switch (GST_QUERY_TYPE (query)) {

   978     case GST_QUERY_POSITION:

   979     {

   980       gst_query_parse_position (query, &formt, NULL);

   981       if (formt == GST_FORMAT_BYTES) {

   982         gst_query_set_position (query, formt, myth->read_offset);

   983         GST_DEBUG_OBJECT (myth, "POS %" G_GINT64_FORMAT, myth->read_offset);

   984         res = TRUE;

   985       } else if (formt == GST_FORMAT_TIME) {

   986         res = gst_pad_query_default (pad, query);

   987       }

   988       break;

   989     }

   990     case GST_QUERY_DURATION:

   991     {

   992 #if 0

   993       if (myth->duration != 0) {

   994         gint64 total;

   995         gint64 fps;

   997         fps = nuv->h->i_fpsn / nuv->h->i_fpsd;

   998         total =

   999             gst_util_uint64_scale_int (GST_SECOND, nuv->h->i_video_blocks, fps);

  1000       }

  1001 #endif

  1003       gst_query_parse_duration (query, &formt, NULL);

  1004       if (formt == GST_FORMAT_BYTES) {

  1005         gst_query_set_duration (query, formt, myth->content_size);

  1006         GST_DEBUG_OBJECT (myth, "SIZE %" G_GINT64_FORMAT, myth->content_size);

  1007         res = TRUE;

  1008       } else if (formt == GST_FORMAT_TIME) {

  1009         res = gst_pad_query_default (pad, query);

  1010       }

  1011       break;

  1012     }

  1013     default:

  1014     {

  1015       res = gst_pad_query_default (pad, query);

  1016       break;

  1017     }

  1018   }

  1020   gst_object_unref (myth);

  1022   return res;

  1023 }

  1025 static GstStateChangeReturn

  1026 gst_mythtv_src_change_state (GstElement * element, GstStateChange transition)

  1027 {

  1028   GstStateChangeReturn ret = GST_STATE_CHANGE_FAILURE;

  1029   GstMythtvSrc *src = GST_MYTHTV_SRC (element);

  1031   switch (transition) {

  1032     case GST_STATE_CHANGE_NULL_TO_READY:

  1033       break;

  1034     case GST_STATE_CHANGE_READY_TO_PAUSED:

  1035       break;

  1036     case GST_STATE_CHANGE_PAUSED_TO_PLAYING:

  1037       if (src->live_tv) {

  1038         if (!gmyth_recorder_send_frontend_ready_command (src->spawn_livetv->

  1039                 recorder))

  1040           GST_WARNING_OBJECT (src,

  1041               "Couldn't send the FRONTEND_READY message to the backend!");

  1042         else

  1043           GST_DEBUG_OBJECT (src, "FRONTEND_READY was sent to the backend");

  1044       }

  1045       break;

  1046     default:

  1047       break;

  1048   }

  1050   ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);

  1051   if (ret == GST_STATE_CHANGE_FAILURE)

  1052     return ret;

  1054   switch (transition) {

  1055     case GST_STATE_CHANGE_READY_TO_NULL:

  1056       break;

  1057     case GST_STATE_CHANGE_PLAYING_TO_PAUSED:

  1058     case GST_STATE_CHANGE_PAUSED_TO_READY:

  1059       if (src->live_tv) {

  1060         if (!gmyth_recorder_send_frontend_ready_command (src->spawn_livetv->

  1061                 recorder))

  1062           GST_WARNING_OBJECT (src,

  1063               "Couldn't send the FRONTEND_READY message to the backend!");

  1064         else

  1065           GST_DEBUG_OBJECT (src, "FRONTEND_READY was sent to the backend");

  1066       }

  1067       break;

  1068     default:

  1069       break;

  1070   }

  1072   return ret;

  1073 }

  1075 static void

  1076 gst_mythtv_src_set_property (GObject * object, guint prop_id,

  1077     const GValue * value, GParamSpec * pspec)

  1078 {

  1079   GstMythtvSrc *mythtvsrc = GST_MYTHTV_SRC (object);

  1081   GST_OBJECT_LOCK (mythtvsrc);

  1082   switch (prop_id) {

  1083     case PROP_LOCATION:

  1084     {

  1085       if (!g_value_get_string (value)) {

  1086         GST_WARNING ("location property cannot be NULL");

  1087 	break;

  1088       }

  1090       if (mythtvsrc->uri_name != NULL) {

  1091         g_free (mythtvsrc->uri_name);

  1092         mythtvsrc->uri_name = NULL;

  1093       }

  1094       mythtvsrc->uri_name = g_value_dup_string (value);

  1096       break;

  1097     }

  1098 #ifndef GST_DISABLE_GST_DEBUG

  1099     case PROP_GMYTHTV_DBG:

  1100     {

  1101       mythtvsrc->mythtv_msgs_dbg = g_value_get_boolean (value);

  1102       break;

  1103     }

  1104 #endif

  1105     case PROP_GMYTHTV_VERSION:

  1106     {

  1107       mythtvsrc->mythtv_version = g_value_get_int (value);

  1108       break;

  1109     }

  1110     case PROP_GMYTHTV_LIVEID:

  1111     {

  1112       mythtvsrc->live_tv_id = g_value_get_int (value);

  1113       break;

  1114     }

  1115     case PROP_GMYTHTV_LIVE:

  1116     {

  1117       mythtvsrc->live_tv = g_value_get_boolean (value);

  1118       break;

  1119     }

  1120     case PROP_GMYTHTV_ENABLE_TIMING_POSITION:

  1121     {

  1122       mythtvsrc->enable_timing_position = g_value_get_boolean (value);

  1123       break;

  1124     }

  1125     case PROP_GMYTHTV_LIVE_CHAINID:

  1126     {

  1127       if (!g_value_get_string (value)) {

  1128         GST_WARNING ("MythTV Live chainid property cannot be NULL");

  1129 	break;

  1130       }

  1132       if (mythtvsrc->live_chain_id != NULL) {

  1133         g_free (mythtvsrc->live_chain_id);

  1134         mythtvsrc->live_chain_id = NULL;

  1135       }

  1136       mythtvsrc->live_chain_id = g_value_dup_string (value);

  1137       break;

  1138     }

  1139     case PROP_GMYTHTV_CHANNEL_NUM:

  1140     {

  1141       mythtvsrc->channel_num = g_value_get_int (value);

  1142       break;

  1143     }

  1144     default:

  1145       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

  1146       break;

  1147   }

  1149   GST_OBJECT_UNLOCK (mythtvsrc);

  1150 }

  1152 static void

  1153 gst_mythtv_src_get_property (GObject * object, guint prop_id,

  1154     GValue * value, GParamSpec * pspec)

  1155 {

  1156   GstMythtvSrc *mythtvsrc = GST_MYTHTV_SRC (object);

  1158   GST_OBJECT_LOCK (mythtvsrc);

  1159   switch (prop_id) {

  1160     case PROP_LOCATION:

  1161     {

  1162       gchar *str = g_strdup ("");

  1164       if (mythtvsrc->uri_name == NULL) {

  1165         g_free (mythtvsrc->uri_name);

  1166         mythtvsrc->uri_name = NULL;

  1167       } else {

  1168         str = g_strdup (mythtvsrc->uri_name);

  1169       }

  1170       g_value_set_string (value, str);

  1171       break;

  1172     }

  1173 #ifndef GST_DISABLE_GST_DEBUG

  1174     case PROP_GMYTHTV_DBG:

  1175       g_value_set_boolean (value, mythtvsrc->mythtv_msgs_dbg);

  1176       break;

  1177 #endif

  1178     case PROP_GMYTHTV_VERSION:

  1179     {

  1180       g_value_set_int (value, mythtvsrc->mythtv_version);

  1181       break;

  1182     }

  1183     case PROP_GMYTHTV_LIVEID:

  1184     {

  1185       g_value_set_int (value, mythtvsrc->live_tv_id);

  1186       break;

  1187     }

  1188     case PROP_GMYTHTV_LIVE:

  1189       g_value_set_boolean (value, mythtvsrc->live_tv);

  1190       break;

  1191     case PROP_GMYTHTV_ENABLE_TIMING_POSITION:

  1192       g_value_set_boolean (value, mythtvsrc->enable_timing_position);

  1193       break;

  1194     case PROP_GMYTHTV_LIVE_CHAINID:

  1195     {

  1196       gchar *str = g_strdup ("");

  1198       if (mythtvsrc->live_chain_id == NULL) {

  1199         g_free (mythtvsrc->live_chain_id);

  1200         mythtvsrc->live_chain_id = NULL;

  1201       } else {

  1202         str = g_strdup (mythtvsrc->live_chain_id);

  1203       }

  1204       g_value_set_string (value, str);

  1205       break;

  1206     }

  1207     case PROP_GMYTHTV_CHANNEL_NUM:

  1208     {

  1209       g_value_set_int (value, mythtvsrc->channel_num);

  1210       break;

  1211     }

  1212     default:

  1213       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

  1214       break;

  1215   }

  1216   GST_OBJECT_UNLOCK (mythtvsrc);

  1217 }

  1219 static gboolean

  1220 plugin_init (GstPlugin * plugin)

  1221 {

  1222   return gst_element_register (plugin, "mythtvsrc", GST_RANK_NONE,

  1223       GST_TYPE_MYTHTV_SRC);

  1224 }

  1226 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,

  1227     GST_VERSION_MINOR,

  1228     "mythtv",

  1229     "lib MythTV src",

  1230     plugin_init, VERSION, "LGPL", "GStreamer", "http://gstreamer.net/");

  1233 /*** GSTURIHANDLER INTERFACE *************************************************/

  1234 static guint

  1235 gst_mythtv_src_uri_get_type (void)

  1236 {

  1237   return GST_URI_SRC;

  1238 }

  1240 static gchar **

  1241 gst_mythtv_src_uri_get_protocols (void)

  1242 {

  1243   static gchar *protocols[] = { "myth", "myths", NULL };

  1245   return protocols;

  1246 }

  1248 static const gchar *

  1249 gst_mythtv_src_uri_get_uri (GstURIHandler * handler)

  1250 {

  1251   GstMythtvSrc *src = GST_MYTHTV_SRC (handler);

  1253   return src->uri_name;

  1254 }

  1256 static gboolean

  1257 gst_mythtv_src_uri_set_uri (GstURIHandler * handler, const gchar * uri)

  1258 {

  1259   GstMythtvSrc *src = GST_MYTHTV_SRC (handler);

  1261   gchar *protocol;

  1263   protocol = gst_uri_get_protocol (uri);

  1264   if ((strcmp (protocol, "myth") != 0) && (strcmp (protocol, "myths") != 0)) {

  1265     g_free (protocol);

  1266     return FALSE;

  1267   }

  1268   g_free (protocol);

  1269   g_object_set (src, "location", uri, NULL);

  1271   return TRUE;

  1272 }

  1274 static void

  1275 gst_mythtv_src_uri_handler_init (gpointer g_iface, gpointer iface_data)

  1276 {

  1277   GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;

  1279   iface->get_type = gst_mythtv_src_uri_get_type;

  1280   iface->get_protocols = gst_mythtv_src_uri_get_protocols;

  1281   iface->get_uri = gst_mythtv_src_uri_get_uri;

  1282   iface->set_uri = gst_mythtv_src_uri_set_uri;

  1283 }

  1285 void

  1286 size_header_handler (void *userdata, const char *value)

  1287 {

  1288   GstMythtvSrc *src = GST_MYTHTV_SRC (userdata);

  1290   GST_DEBUG_OBJECT (src, "content size = %lld bytes", src->content_size);

  1291 }

author	morphbr
	Thu Jan 25 18:17:40 2007 +0000 (2007-01-25)
branch	trunk
changeset 305	9d4af01c6a2f
parent 303	c96177e93ee2
child 308	fb8c04a619ad
permissions	-rwxr-xr-x