gmyth: gst-gmyth/mythsrc/gstmythtvsrc.c@7f290a3a34b1

     1 /*

     2  * GStreamer MythTV Plug-in Copyright (C) <2006> Rosfran Borges

     3  * <rosfran.borges@indt.org.br> This library is free software; you can

     4  * redistribute it and/or modify it under the terms of the GNU Library

     5  * General Public License as published by the Free Software Foundation;

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

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

     8  * WITHOUT ANY WARRANTY; without even the implied warranty of

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

    10  * General Public License for more details. You should have received a copy

    11  * of the GNU Library General Public License along with this library; if

    12  * not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite

    13  * 330, Boston, MA 02111-1307, USA.

    14  */

    15 /**

    16  * SECTION:element-mythtvsrc

    17  *

    18  * <refsect2>

    19  * <para>

    20  * MythTVSrc allows to access a remote MythTV backend streaming Video/Audio server,

    21  * and to render audio and video content through a TCP/IP connection to a specific

    22  * port on this server, and based on a known MythTV protocol that is based on

    23  * some message passing, such as REQUEST_BLOCK on a specified number of bytes, to get

    24  * some chunk of remote file data.

    25  * You should pass the information aboute the remote MythTV backend server

    26  * through the <link linkend="GstMythTVSrc--location">location</link> property.

    27  * </para>

    28  * <title>Examples</title>

    29  * <para>

    30  * If you want to get the LiveTV content (set channel, TV tuner, RemoteEncoder,

    31  * Recorder),

    32  * put the following URI:

    33  *

    34  * <programlisting>

    35  *  myth://xxx.xxx.xxx.xxx:6543/livetv?channel=BBC

    36  * </programlisting>

    37  *

    38  * This URI will say to the gmyth library to configure the Recorder instance (used to

    39  * change the channel, start the TV multimedia content transmition, etc.), using

    40  * the IP address (xxx.xxx.xxx.xxx) and port number (6543) of the MythTV backend

    41  * server, and setting the channel name to "BBC".

    42  *

    43  * To get a already recorded the MythTV NUV file, put the following URI:

    44  *

    45  * <programlisting>

    46  *  myth://xxx.xxx.xxx.xxx:6543/filename.nuv

    47  * </programlisting>

    48  *

    49  * This URI will say to the gmyth library to configure the Recorder instance (used to

    50  * change the channel, start the TV multimedia content transmition, etc.), using

    51  * the IP address (xxx.xxx.xxx.xxx) and port number (6543) of the MythTV backend

    52  * server, and setting the channel name to "BBC".

    53  *

    54  * Another possible way to use the LiveTV content, and just in the case you want to

    55  * use the mysql database, put the location URI in the following format:

    56  *

    57  * <programlisting>

    58  *  myth://mythtv:mythtv@xxx.xxx.xxx.xxx:6543/?mythconverg&channel=9

    59  * </programlisting>

    60  *

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

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

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

    64  * </para>

    65  * </refsect2>

    66  */

    67 #ifdef HAVE_CONFIG_H

    68 #include "config.h"

    69 #endif

    71 #include "gstmythtvsrc.h"

    72 #include <gmyth/gmyth_file.h>

    73 #include <gmyth/gmyth_file_transfer.h>

    74 #include <gmyth/gmyth_file_local.h>

    75 #include <gmyth/gmyth_livetv.h>

    77 #include <gmyth/gmyth_socket.h>

    78 #include <gmyth/gmyth_tvchain.h>

    80 #include <string.h>

    81 #include <unistd.h>

    83 GST_DEBUG_CATEGORY_STATIC(mythtvsrc_debug);

    84 #define GST_GMYTHTV_ID_NUM                  1

    85 #define GST_GMYTHTV_CHANNEL_DEFAULT_NUM     (-1)

    86 #define GMYTHTV_VERSION_DEFAULT			    30

    87 #define GMYTHTV_TRANSFER_MAX_WAITS          100

    88 #define GMYTHTV_TRANSFER_MAX_RESENDS        2

    89 #define GMYTHTV_TRANSFER_MAX_BUFFER         (128*1024)

    90 #define MAX_READ_SIZE                       (4*1024)

    91 #define GST_FLOW_ERROR_NO_DATA              (-101)

    92 #define REQUEST_MAX_SIZE                    (64*1024)

    93 #define INTERNAL_BUFFER_SIZE                (90*1024)

    95 static const GstElementDetails gst_mythtv_src_details =

    96 GST_ELEMENT_DETAILS("MythTV client source",

    97                     "Source/Network",

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

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

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

   102 static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE("src",

   103                                                                   GST_PAD_SRC,

   104                                                                   GST_PAD_ALWAYS,

   105                                                                   GST_STATIC_CAPS_ANY);

   106     /*

   107      * GST_STATIC_CAPS ("video/x-nuv"));

   108      */

   110 enum {

   111     PROP_0,

   112     PROP_LOCATION,

   113     PROP_GMYTHTV_VERSION,

   114     PROP_GMYTHTV_LIVE,

   115     PROP_GMYTHTV_LIVEID,

   116     PROP_GMYTHTV_LIVE_CHAINID,

   117     PROP_GMYTHTV_ENABLE_TIMING_POSITION,

   118     PROP_GMYTHTV_CHANNEL_NUM

   119 };

   121 static void     gst_mythtv_src_clear(GstMythtvSrc * mythtv_src);

   123 static void     gst_mythtv_src_finalize(GObject * gobject);

   125 static GstFlowReturn gst_mythtv_src_create(GstPushSrc * psrc,

   126                                            GstBuffer ** outbuf);

   128 static gboolean gst_mythtv_src_start(GstBaseSrc * bsrc);

   129 static gboolean gst_mythtv_src_stop(GstBaseSrc * bsrc);

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

   131 static gboolean gst_mythtv_src_is_seekable(GstBaseSrc * push_src);

   133 static gboolean gst_mythtv_src_do_seek(GstBaseSrc * base,

   134                                        GstSegment * segment);

   136 static          GstStateChangeReturn

   137 gst_mythtv_src_change_state(GstElement * element,

   138                             GstStateChange transition);

   140 static void     gst_mythtv_src_set_property(GObject * object,

   141                                             guint prop_id,

   142                                             const GValue * value,

   143                                             GParamSpec * pspec);

   144 static void     gst_mythtv_src_get_property(GObject * object,

   145                                             guint prop_id, GValue * value,

   146                                             GParamSpec * pspec);

   148 static void     gst_mythtv_src_uri_handler_init(gpointer g_iface,

   149                                                 gpointer iface_data);

   151 static gboolean gst_mythtv_src_handle_query(GstPad * pad,

   152                                             GstQuery * query);

   154 static gboolean gst_mythtv_src_handle_event(GstPad * pad,

   155                                             GstEvent * event);

   157 static GMythFileReadResult do_read_request_response(GstMythtvSrc * src,

   158                                                     guint size,

   159                                                     GByteArray * data_ptr);

   161 static void

   162 _urihandler_init(GType type)

   163 {

   164     static const GInterfaceInfo urihandler_info = {

   165         gst_mythtv_src_uri_handler_init,

   166         NULL,

   167         NULL

   168     };

   170     g_type_add_interface_static(type, GST_TYPE_URI_HANDLER,

   171                                 &urihandler_info);

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

   174 }

   176 GST_BOILERPLATE_FULL(GstMythtvSrc, gst_mythtv_src, GstPushSrc,

   177                      GST_TYPE_PUSH_SRC, _urihandler_init)

   178     static void     gst_mythtv_src_base_init(gpointer g_class)

   179 {

   180     GstElementClass *element_class = GST_ELEMENT_CLASS(g_class);

   182     gst_element_class_add_pad_template(element_class,

   183                                        gst_static_pad_template_get

   184                                        (&srctemplate));

   186     gst_element_class_set_details(element_class, &gst_mythtv_src_details);

   188     element_class->change_state = gst_mythtv_src_change_state;

   190 }

   192 static void

   193 gst_mythtv_src_class_init(GstMythtvSrcClass * klass)

   194 {

   195     GObjectClass   *gobject_class;

   196     GstPushSrcClass *gstpushsrc_class;

   197     GstBaseSrcClass *gstbasesrc_class;

   199     gobject_class = (GObjectClass *) klass;

   200     gstbasesrc_class = (GstBaseSrcClass *) klass;

   201     gstpushsrc_class = (GstPushSrcClass *) klass;

   203     gobject_class->set_property = gst_mythtv_src_set_property;

   204     gobject_class->get_property = gst_mythtv_src_get_property;

   205     gobject_class->finalize = gst_mythtv_src_finalize;

   207     g_object_class_install_property

   208         (gobject_class, PROP_LOCATION,

   209          g_param_spec_string("location", "Location",

   210                              "The location. In the form:"

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

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

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

   214                              "", G_PARAM_READWRITE));

   216     g_object_class_install_property

   217         (gobject_class, PROP_GMYTHTV_VERSION,

   218          g_param_spec_int("mythtv-version", "mythtv-version",

   219                           "Change MythTV version", 26, 30, 26,

   220                           G_PARAM_READWRITE));

   222     g_object_class_install_property

   223         (gobject_class, PROP_GMYTHTV_LIVEID,

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

   225                           "Change MythTV version",

   226                           0, 200, GST_GMYTHTV_ID_NUM, G_PARAM_READWRITE));

   228     g_object_class_install_property

   229         (gobject_class, PROP_GMYTHTV_LIVE_CHAINID,

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

   231                              "Sets the MythTV chain ID (from TV Chain)",

   232                              "", G_PARAM_READWRITE));

   234     g_object_class_install_property

   235         (gobject_class, PROP_GMYTHTV_LIVE,

   236          g_param_spec_boolean("mythtv-live", "mythtv-live",

   237                               "Enable MythTV Live TV content streaming",

   238                               FALSE, G_PARAM_READWRITE));

   240     g_object_class_install_property

   241         (gobject_class, PROP_GMYTHTV_ENABLE_TIMING_POSITION,

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

   243                               "mythtv-enable-timing-position",

   244                               "Enable MythTV Live TV content size continuous updating",

   245                               FALSE, G_PARAM_READWRITE));

   247     g_object_class_install_property

   248         (gobject_class, PROP_GMYTHTV_CHANNEL_NUM,

   249          g_param_spec_string("mythtv-channel", "mythtv-channel",

   250                              "Change MythTV channel number",

   251                              "", G_PARAM_READWRITE));

   253     gstbasesrc_class->start = gst_mythtv_src_start;

   254     gstbasesrc_class->stop = gst_mythtv_src_stop;

   255     gstbasesrc_class->get_size = gst_mythtv_src_get_size;

   256     gstbasesrc_class->is_seekable = gst_mythtv_src_is_seekable;

   258     gstbasesrc_class->do_seek = gst_mythtv_src_do_seek;

   259     gstpushsrc_class->create = gst_mythtv_src_create;

   261     GST_DEBUG_CATEGORY_INIT(mythtvsrc_debug, "mythtvsrc", 0,

   262                             "MythTV Client Source");

   263 }

   265 static void

   266 gst_mythtv_src_init(GstMythtvSrc * this, GstMythtvSrcClass * g_class)

   267 {

   268     this->file = NULL;

   269     this->unique_setup = FALSE;

   270     this->mythtv_version = GMYTHTV_VERSION_DEFAULT;

   271     this->state = GST_MYTHTV_SRC_FILE_TRANSFER;

   272     this->bytes_read = 0;

   273     this->prev_content_size = 0;

   274     this->content_size = 0;

   275     this->read_offset = 0;

   276     this->content_size_last = 0;

   277     this->live_tv = FALSE;

   278     this->enable_timing_position = FALSE;

   279     this->update_prog_chain = FALSE;

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

   281     this->update_prog_chain = FALSE;

   282     this->channel_name = NULL;

   283     this->eos = FALSE;

   284     this->bytes_queue = NULL;

   285     this->wait_to_transfer = 0;

   286     gst_base_src_set_format(GST_BASE_SRC(this), GST_FORMAT_BYTES);

   287     gst_pad_set_event_function(GST_BASE_SRC_PAD(GST_BASE_SRC(this)),

   288                                gst_mythtv_src_handle_event);

   289     gst_pad_set_query_function(GST_BASE_SRC_PAD(GST_BASE_SRC(this)),

   290                                gst_mythtv_src_handle_query);

   292 }

   294 static void

   295 gst_mythtv_src_clear(GstMythtvSrc * mythtv_src)

   296 {

   297     mythtv_src->unique_setup = FALSE;

   299     if (mythtv_src->spawn_livetv) {

   300         g_object_unref(mythtv_src->spawn_livetv);

   301         mythtv_src->spawn_livetv = NULL;

   302     }

   304     if (mythtv_src->file) {

   305         g_object_unref(mythtv_src->file);

   306         mythtv_src->file = NULL;

   307     }

   309     if (mythtv_src->backend_info) {

   310         g_object_unref(mythtv_src->backend_info);

   311         mythtv_src->backend_info = NULL;

   312     }

   314     if (mythtv_src->bytes_queue) {

   315         g_byte_array_free(mythtv_src->bytes_queue, TRUE);

   316         mythtv_src->bytes_queue = NULL;

   317     }

   318 }

   320 static void

   321 gst_mythtv_src_finalize(GObject * gobject)

   322 {

   323     GstMythtvSrc   *this = GST_MYTHTV_SRC(gobject);

   325     gst_mythtv_src_clear(this);

   327     if (this->uri_name) {

   328         g_free(this->uri_name);

   329         this->uri_name = NULL;

   330     }

   332     if (this->user_agent) {

   333         g_free(this->user_agent);

   334         this->user_agent = NULL;

   335     }

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

   338 }

   340 static GMythFileReadResult

   341 do_read_request_response(GstMythtvSrc * src, guint size,

   342                          GByteArray * data_ptr)

   343 {

   344     gint            read = 0;

   345     guint           sizetoread = size;

   346     gint            max_iters = GMYTHTV_TRANSFER_MAX_RESENDS;

   347     GMythFileReadResult result;

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

   351     /*

   352      * Loop sending the Myth File Transfer request: Retry whilst

   353      * authentication fails and we supply it.

   354      */

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

   357         /*

   358          * if ( gmyth_backend_info_is_local_file(src->backend_info) )

   359          */

   360         if (IS_GMYTH_FILE_LOCAL(src->file))

   361             result = gmyth_file_local_read(GMYTH_FILE_LOCAL(src->file),

   362                                            data_ptr, sizetoread,

   363                                            src->live_tv);

   364         else if (IS_GMYTH_FILE_TRANSFER(src->file))

   365             result =

   366                 gmyth_file_transfer_read(GMYTH_FILE_TRANSFER(src->file),

   367                                          data_ptr, sizetoread,

   368                                          src->live_tv);

   370         if (data_ptr->len > 0) {

   371             read += data_ptr->len;

   372             sizetoread -= data_ptr->len;

   373         } else if (data_ptr->len <= 0) {

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

   375                 result = GMYTH_FILE_READ_EOF;

   376                 goto eos;

   377             } else {

   378                 if (result == GMYTH_FILE_READ_ERROR) {  /* -314 */

   379                     GST_INFO_OBJECT(src,

   380                                     "[LiveTV] FileTransfer READ_ERROR!");

   381                     goto done;

   382                 } else if (result == GMYTH_FILE_READ_NEXT_PROG_CHAIN) { /* -315

   383                                                                          */

   384                     GST_INFO_OBJECT(src,

   385                                     "[LiveTV] FileTransfer - Go to athe next program chain!");

   386                     src->update_prog_chain = TRUE;

   387                     continue;

   388                 }

   389                 goto done;

   390             }

   392         }

   393         /*

   394          * else if (data_ptr->len == 0) goto done;

   395          */

   396         if (read == sizetoread)

   397             goto done;

   398     }

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

   401         result = GMYTH_FILE_READ_EOF;

   402         goto eos;

   403     }

   405     goto done;

   407   eos:

   408     src->eos = TRUE;

   410   done:

   411     return result;

   412 }

   414 static GstFlowReturn

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

   416 {

   417     GstMythtvSrc   *src;

   418     GstFlowReturn   ret = GST_FLOW_OK;

   419     guint           buffer_size_inter = 0;

   421     src = GST_MYTHTV_SRC(psrc);

   423     /*

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

   425      */

   426     if (G_UNLIKELY(src->eos))

   427         goto eos;

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

   429                      src->read_offset, MAX_READ_SIZE);

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

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

   434   program_chain_changed:

   435     /*

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

   437      */

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

   439         GByteArray     *buffer;

   440         GMythFileReadResult result = GMYTH_FILE_READ_OK;

   442         buffer = NULL;

   443         buffer_size_inter = (INTERNAL_BUFFER_SIZE - src->buffer_remain);

   445         if (buffer_size_inter > REQUEST_MAX_SIZE)

   446             buffer_size_inter = REQUEST_MAX_SIZE;

   448         buffer = g_byte_array_new();

   450         result = do_read_request_response(src, buffer_size_inter, buffer);

   452         /*

   453          * got the next program info?

   454          */

   455         if (G_UNLIKELY(src->update_prog_chain) ||

   456             (result == GMYTH_FILE_READ_NEXT_PROG_CHAIN)) {

   457             GST_DEBUG_OBJECT(src,

   458                              "Update PROGRAM CHAIN!!! buffer_size = %d.",

   459                              src->bytes_queue->len);

   460             gst_pad_push_event(GST_BASE_SRC_PAD(GST_BASE_SRC(psrc)),

   461                                gst_event_new_custom

   462                                (GST_EVENT_CUSTOM_DOWNSTREAM, NULL));

   463             /*

   464              * gst_pad_push_event (GST_BASE_SRC_PAD (GST_BASE_SRC (psrc)),

   465              * gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_BYTES, 0,

   466              * -1, 0));

   467              */

   468             src->update_prog_chain = FALSE;

   469             src->eos = FALSE;

   471             if (result == GMYTH_FILE_READ_NEXT_PROG_CHAIN) {

   472                 /*

   473                  * if (buffer != NULL) { g_byte_array_free (buffer, TRUE);

   474                  * buffer = NULL; } goto program_chain_changed;

   475                  */

   476             } else if (result == GMYTH_FILE_READ_OK) {

   477                 /*

   478                  * remove wasteful, NUV file header data

   479                  */

   480                 /*

   481                  * buffer = g_byte_array_remove_range( buffer, 0, 512 );

   482                  */

   483                 /*

   484                  * TODO: need to send a new segment event to NUVDemux?

   485                  */

   486                 // gst_pad_push_event (GST_BASE_SRC_PAD (GST_BASE_SRC

   487                 // (psrc)),

   488                 // gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_BYTES,

   489                 // 0, -1, 0));

   491                 /*

   492                  * goto change_progchain;

   493                  */

   494             }

   496         }

   497         /*

   498          */

   499         if (G_UNLIKELY(buffer->len < 0)) {

   500             if (buffer != NULL) {

   501                 g_byte_array_free(buffer, TRUE);

   502                 buffer = NULL;

   503             }

   505             if (src->live_tv ||

   506                 (result == GMYTH_FILE_READ_NEXT_PROG_CHAIN))

   507                 goto change_progchain;

   508             else

   509                 goto read_error;

   510         } else if (G_UNLIKELY(buffer->len == 0)) {

   512             if (buffer != NULL) {

   513                 g_byte_array_free(buffer, TRUE);

   514                 buffer = NULL;

   515             }

   517             if (!src->live_tv) {

   518                 if (src->eos)

   519                     goto eos;

   520                 else

   521                     goto done;

   522             }

   523             else

   524                 goto program_chain_changed;

   525         }

   527         src->bytes_queue =

   528             g_byte_array_append(src->bytes_queue, buffer->data,

   529                                 buffer->len);

   530         if (buffer->len > buffer_size_inter)

   531             GST_WARNING_OBJECT(src,

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

   533                                abs(buffer->len - buffer_size_inter));

   535         src->buffer_remain += buffer->len;

   537         if (buffer != NULL) {

   538             g_byte_array_free(buffer, TRUE);

   539             buffer = NULL;

   540         }

   542         /*

   543          * GST_DEBUG_OBJECT (src, "BYTES READ (actual) = %d, BYTES READ

   544          * (cumulative) = %llu, " "OFFSET = %llu, CONTENT SIZE = %llu.",

   545          * read, src->bytes_read, src->read_offset, src->content_size);

   546          */

   547     }

   549     guint buffer_size;

   550     buffer_size = (src->buffer_remain <  MAX_READ_SIZE) ?

   551                    src->buffer_remain :

   552                    MAX_READ_SIZE;

   554     *outbuf = gst_buffer_new();

   556     /*

   557      * GST_DEBUG_OBJECT (src, "read from network? %s!, buffer_remain =

   558      * %d", (buffer_size_inter == 0) ? "NO, got from buffer" : "YES, go

   559      * see the backend's log file", src->buffer_remain);

   560      */

   562     GST_BUFFER_SIZE(*outbuf) = buffer_size;

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

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

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

   566               GST_BUFFER_SIZE(*outbuf));

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

   568     GST_BUFFER_OFFSET_END(*outbuf) =

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

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

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

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

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

   576     // GST_BUFFER_SIZE (*outbuf));

   578     /*

   579      * flushs the newly buffer got from byte array

   580      */

   581     src->bytes_queue =

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

   584     if (src->eos  ||

   585         (!src->live_tv && (src->bytes_read >= src->content_size))

   586        )

   587         goto eos;

   589   done:

   590     {

   591         return ret;

   592     }

   593   eos:

   594     {

   595         return GST_FLOW_UNEXPECTED;

   596     }

   597     /*

   598      * ERRORS

   599      */

   600   read_error:

   601     {

   602         GST_ELEMENT_ERROR(src, RESOURCE, READ,

   603                           (NULL), ("Could not read any bytes (%i, %s)",

   604                                    read, src->uri_name));

   605         return GST_FLOW_ERROR;

   606     }

   607   change_progchain:

   608     {

   609         GST_ELEMENT_ERROR(src, RESOURCE, READ,

   610                           (NULL),

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

   612                            read, src->uri_name));

   614         /*

   615          * TODO: need to send a new segment event to NUVDemux?

   616          */

   617         gst_pad_push_event(GST_BASE_SRC_PAD(GST_BASE_SRC(psrc)),

   618                            gst_event_new_new_segment(TRUE, 1.0,

   619                                                      GST_FORMAT_TIME, 0,

   620                                                      -1, 0));

   622         goto program_chain_changed;

   623     }

   625 }

   627 gint64

   628 gst_mythtv_src_get_position(GstMythtvSrc * src)

   629 {

   631     gint64          size_tmp = 0;

   632     guint           max_tries = 2;

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

   635                                  GMYTHTV_TRANSFER_MAX_BUFFER)) {

   637       get_file_pos:

   638         g_usleep(10);

   639         size_tmp =

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

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

   642             src->content_size = size_tmp;

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

   644             goto get_file_pos;

   645         GST_LOG_OBJECT(src, "GET_POSITION: file_position = %lld",

   646                        size_tmp);

   647         /*

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

   649          */

   650         src->prev_content_size = src->content_size;

   651     }

   653     return src->content_size;

   655 }

   657 static gboolean

   658 gst_mythtv_src_do_seek(GstBaseSrc * base, GstSegment * segment)

   659 {

   660     GstMythtvSrc   *src = GST_MYTHTV_SRC(base);

   661     gint64          new_offset = -1;

   662     gint64          actual_seek = segment->start;

   663     gboolean        ret = TRUE;

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

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

   668         goto done;

   669     }

   670     GST_LOG_OBJECT(src,

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

   672                    actual_seek, src->read_offset);

   673     /*

   674      * verify if it needs to seek

   675      */

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

   678         /*

   679          * if ( gmyth_backend_info_is_local_file(src->backend_info) )

   680          */

   681         if (IS_GMYTH_FILE_LOCAL(src->file))

   682             new_offset =

   683                 gmyth_file_local_seek(GMYTH_FILE_LOCAL(src->file),

   684                                       segment->start, G_SEEK_SET);

   685         else if (IS_GMYTH_FILE_TRANSFER(src->file))

   686             new_offset =

   687                 gmyth_file_transfer_seek(GMYTH_FILE_TRANSFER(src->file),

   688                                          segment->start, SEEK_SET);

   690         GST_LOG_OBJECT(src,

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

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

   693         if (G_UNLIKELY(new_offset < 0)) {

   694             ret = FALSE;

   695             if (!src->live_tv)

   696                 goto eos;

   697         }

   699         src->read_offset = new_offset;

   701         if (ret == FALSE) {

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

   703         }

   705     }

   707   done:

   708     return ret;

   710   eos:

   711     {

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

   713         return FALSE;

   714     }

   716 }

   718 /*

   719  * create a socket for connecting to remote server

   720  */

   721 static gboolean

   722 gst_mythtv_src_start(GstBaseSrc * bsrc)

   723 {

   724     GstMythtvSrc   *src = GST_MYTHTV_SRC(bsrc);

   726     GString        *chain_id_local = NULL;

   727     GMythURI       *gmyth_uri = NULL;

   728     gboolean        ret = TRUE;

   729     GstMessage     *msg;

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

   732         src->unique_setup = TRUE;

   733     } else {

   734         goto done;

   735     }

   737     gmyth_uri = gmyth_uri_new_with_value(src->uri_name);

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

   739     src->live_tv = gmyth_uri_is_livetv(gmyth_uri);

   740     /*

   741      * testing UPnP...

   742      */

   743     /*

   744      * gmyth_backend_info_set_hostname( src->backend_info, NULL );

   745      */

   746     if (src->live_tv) {

   747         src->spawn_livetv = gmyth_livetv_new(src->backend_info);

   749         gchar          *ch = gmyth_uri_get_channel_name(gmyth_uri);

   750         if (ch != NULL)

   751             src->channel_name = ch;

   753         if (src->channel_name != NULL) {

   754             gboolean        result;

   755             result =

   756                 gmyth_livetv_channel_name_setup(src->spawn_livetv,

   757                                                 src->channel_name);

   758             if (result == FALSE) {

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

   760                 ret = FALSE;

   761                 goto init_failed;

   762             }

   764         } else {

   765             if (gmyth_livetv_setup(src->spawn_livetv) == FALSE) {

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

   767                 ret = FALSE;

   768                 goto init_failed;

   769             }

   770         }

   772         /*

   773          * testing change channel...

   774          */

   775         /*

   776          * gmyth_recorder_change_channel( src->spawn_livetv->recorder,

   777          * CHANNEL_DIRECTION_UP );

   778          */

   780         src->file =

   781             GMYTH_FILE(gmyth_livetv_create_file_transfer

   782                        (src->spawn_livetv));

   784         if (NULL == src->file) {

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

   786             ret = FALSE;

   787             goto init_failed;

   788         }

   790         /*

   791          * Check if the file is local to this specific client renderer

   792          */

   793         if (gmyth_uri_is_local_file(gmyth_uri))

   794             ret = gmyth_file_local_open(GMYTH_FILE_LOCAL(src->file));

   795         else

   796             ret =

   797                 gmyth_file_transfer_open(GMYTH_FILE_TRANSFER(src->file),

   798                                          src->spawn_livetv->uri !=

   799                                          NULL ? gmyth_uri_get_path(src->

   800                                                                    spawn_livetv->

   801                                                                    uri) :

   802                                          src->spawn_livetv->proginfo->

   803                                          pathname->str);

   805         /*

   806          * sets the mythtvsrc "location" property

   807          */

   808         g_object_set(src, "location", gmyth_file_get_uri(src->file), NULL);

   810         if (!ret) {

   811             GST_INFO_OBJECT(src,

   812                             "Error: couldn't open the FileTransfer from LiveTV source!");

   813             g_object_unref(src->file);

   814             src->file = NULL;

   815             goto init_failed;

   816         }

   817     } else {

   819         /*

   820          * Check if the file is local to this specific client renderer,

   821          * and tries to open a local connection

   822          */

   823         if (gmyth_uri_is_local_file(gmyth_uri)) {

   824             src->file =

   825                 GMYTH_FILE(gmyth_file_local_new(src->backend_info));

   826             ret = gmyth_file_local_open(GMYTH_FILE_LOCAL(src->file));

   827         } else {

   828             src->file =

   829                 GMYTH_FILE(gmyth_file_transfer_new(src->backend_info));

   830             ret =

   831                 gmyth_file_transfer_open(GMYTH_FILE_TRANSFER(src->file),

   832                                          src->uri_name);

   833         }

   835     }                           /* if (else) - recorded FileTransfer */

   837     if (NULL == src->file) {

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

   839         goto init_failed;

   840     }

   841     /*

   842      * GST_INFO_OBJECT( src, "uri = %s", src->spawn_livetv->file);

   843      */

   845     if (ret == FALSE) {

   846       GST_INFO_OBJECT(src,

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

   848       goto begin_req_failed;

   849     }

   851     GST_INFO_OBJECT(src,

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

   853                     gmyth_file_get_filesize(src->file), src->content_size);

   855     src->content_size = gmyth_file_get_filesize(src->file);

   857     msg =

   858         gst_message_new_duration(GST_OBJECT(src), GST_FORMAT_BYTES,

   859                                  src->content_size);

   860     gst_element_post_message(GST_ELEMENT(src), msg);

   863     src->do_start = FALSE;

   865     /*

   866      * this is used for the buffer cache

   867      */

   868     src->bytes_queue = g_byte_array_sized_new(INTERNAL_BUFFER_SIZE);

   869     src->buffer_remain = 0;

   871     gst_pad_push_event(GST_BASE_SRC_PAD(GST_BASE_SRC(src)),

   872                        gst_event_new_new_segment(TRUE, 1.0,

   873                                                  GST_FORMAT_TIME, 0,

   874                                                  src->content_size, 0));

   876   done:

   877     if (gmyth_uri != NULL) {

   878         g_object_unref(gmyth_uri);

   879         gmyth_uri = NULL;

   880     }

   882     if (chain_id_local != NULL) {

   883         g_string_free(chain_id_local, TRUE);

   884         chain_id_local = NULL;

   885     }

   887     return TRUE;

   889     /*

   890      * ERRORS

   891      */

   892   init_failed:

   893     if (gmyth_uri != NULL) {

   894         g_object_unref(gmyth_uri);

   895         gmyth_uri = NULL;

   896     }

   898     if (src->spawn_livetv != NULL) {

   899         g_object_unref(src->spawn_livetv);

   900         src->spawn_livetv = NULL;

   901     }

   903     GST_ELEMENT_ERROR(src, LIBRARY, INIT,

   904                       (NULL),

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

   906                        src->uri_name));

   909     gst_mythtv_src_clear(src);

   911     return FALSE;

   912   begin_req_failed:

   913     if (gmyth_uri != NULL) {

   914         g_object_unref(gmyth_uri);

   915         gmyth_uri = NULL;

   916     }

   918     GST_ELEMENT_ERROR(src, LIBRARY, INIT,

   919                       (NULL),

   920                       ("Could not begin request sent to MythTV server (%i, %s)",

   921                        ret, src->uri_name));

   922     return FALSE;

   924 }

   926 static gboolean

   927 gst_mythtv_src_get_size(GstBaseSrc * bsrc, guint64 * size)

   928 {

   929     GstMythtvSrc   *src = GST_MYTHTV_SRC(bsrc);

   930     gboolean        ret = TRUE;

   932     GST_LOG_OBJECT(src,

   933                    "Differs from previous content size: %d (max.: %d)",

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

   935                    GMYTHTV_TRANSFER_MAX_BUFFER);

   937     if (src->live_tv) {

   938         ret = FALSE;

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

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

   941                    GMYTHTV_TRANSFER_MAX_BUFFER)) {

   943         gint64          new_offset =

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

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

   946             src->content_size = new_offset;

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

   948             src->update_prog_chain = TRUE;

   949         }

   951     }

   953     *size = src->content_size;

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

   956     return ret;

   958 }

   960 /*

   961  * close the socket and associated resources used both to recover from

   962  * errors and go to NULL state

   963  */

   964 static gboolean

   965 gst_mythtv_src_stop(GstBaseSrc * bsrc)

   966 {

   967     GstMythtvSrc   *src = GST_MYTHTV_SRC(bsrc);

   969     gst_mythtv_src_clear(src);

   971     /*

   972      * src->eos = FALSE;

   973      */

   975     return TRUE;

   976 }

   978 static gboolean

   979 gst_mythtv_src_handle_event(GstPad * pad, GstEvent * event)

   980 {

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

   982     gint64          cont_size = 0;

   983     gboolean        ret = TRUE;

   985     switch (GST_EVENT_TYPE(event)) {

   986       case GST_EVENT_EOS:

   987         if (src->live_tv) {

   988           cont_size = gst_mythtv_src_get_position(src);

   989           if (cont_size > src->content_size) {

   990             src->content_size = cont_size;

   991             src->eos = FALSE;

   992           } else {

   993             src->eos = TRUE;

   994             gst_element_set_state(GST_ELEMENT(src), GST_STATE_NULL);

   995             gst_element_set_locked_state(GST_ELEMENT(src), FALSE);

   996           }

   997         }

   998         break;

   999     default:

  1000         ret = gst_pad_event_default(pad, event);

  1001     }

  1003     GST_DEBUG_OBJECT (src, "HANDLE EVENT %d", ret);

  1004     return ret;

  1005 }

  1007 static gboolean

  1008 gst_mythtv_src_is_seekable(GstBaseSrc * push_src)

  1009 {

  1010     return TRUE;

  1011 }

  1013 static gboolean

  1014 gst_mythtv_src_handle_query(GstPad * pad, GstQuery * query)

  1015 {

  1016     gboolean        res = FALSE;

  1017     GstMythtvSrc   *myth = GST_MYTHTV_SRC(gst_pad_get_parent(pad));

  1018     GstFormat       formt;

  1021     switch (GST_QUERY_TYPE(query)) {

  1022       case GST_QUERY_POSITION:

  1023         gst_query_parse_position(query, &formt, NULL);

  1024         if (formt == GST_FORMAT_BYTES) {

  1025           gst_query_set_position(query, formt, myth->read_offset);

  1026           GST_DEBUG_OBJECT(myth, "POS %" G_GINT64_FORMAT,

  1027               myth->read_offset);

  1028           res = TRUE;

  1029         } else if (formt == GST_FORMAT_TIME) {

  1030           res = gst_pad_query_default(pad, query);

  1031         }

  1032         break;

  1033       case GST_QUERY_DURATION:

  1034         gst_query_parse_duration(query, &formt, NULL);

  1035         if (formt == GST_FORMAT_BYTES) {

  1036           gint64 size = myth->content_size;

  1038           gst_query_set_duration(query, GST_FORMAT_BYTES, 10);

  1039           GST_DEBUG_OBJECT(myth, "SIZE %" G_GINT64_FORMAT, size);

  1040           res = TRUE;

  1041         } else if (formt == GST_FORMAT_TIME) {

  1042           res = gst_pad_query_default(pad, query);

  1043         }

  1044         break;

  1045       default:

  1046         res = gst_pad_query_default(pad, query);

  1047         break;

  1048     }

  1050     gst_object_unref(myth);

  1052     return res;

  1053 }

  1055 static GstStateChangeReturn

  1056 gst_mythtv_src_change_state(GstElement * element,

  1057                             GstStateChange transition)

  1058 {

  1059     GstStateChangeReturn ret = GST_STATE_CHANGE_FAILURE;

  1060     GstMythtvSrc  *src = GST_MYTHTV_SRC(element);

  1062     switch (transition) {

  1063     case GST_STATE_CHANGE_NULL_TO_READY:

  1064         break;

  1065     case GST_STATE_CHANGE_READY_TO_PAUSED:

  1066       if (!src->uri_name) {

  1067         GST_WARNING_OBJECT (src, "Invalid location");

  1068         return ret;

  1069       }

  1070       break;

  1071     case GST_STATE_CHANGE_PAUSED_TO_PLAYING:

  1072       if (src->live_tv) {

  1073         if (!gmyth_recorder_send_frontend_ready_command

  1074             (src->spawn_livetv->recorder))

  1075           GST_WARNING_OBJECT(src,

  1076               "Couldn't send the FRONTEND_READY message to the backend!");

  1077         else

  1078           GST_DEBUG_OBJECT(src, "FRONTEND_READY was sent to the backend");

  1079       }

  1080       break;

  1081     default:

  1082         break;

  1083     }

  1085     ret = GST_ELEMENT_CLASS(parent_class)->change_state(element, transition);

  1086     if (ret == GST_STATE_CHANGE_FAILURE) {

  1087         return ret;

  1088     }

  1091     switch (transition) {

  1092     case GST_STATE_CHANGE_READY_TO_NULL:

  1093         gst_mythtv_src_clear(src);

  1094         break;

  1095     case GST_STATE_CHANGE_PLAYING_TO_PAUSED:

  1096     case GST_STATE_CHANGE_PAUSED_TO_READY:

  1097         break;

  1098     default:

  1099         break;

  1100     }

  1102     return ret;

  1103 }

  1105 static void

  1106 gst_mythtv_src_set_property(GObject * object, guint prop_id,

  1107                             const GValue * value, GParamSpec * pspec)

  1108 {

  1109     GstMythtvSrc   *mythtvsrc = GST_MYTHTV_SRC(object);

  1111     GST_OBJECT_LOCK(mythtvsrc);

  1112     switch (prop_id) {

  1113       case PROP_LOCATION:

  1114         if (!g_value_get_string(value)) {

  1115           GST_WARNING("location property cannot be NULL");

  1116           break;

  1117         }

  1119         if (mythtvsrc->uri_name != NULL) {

  1120           g_free(mythtvsrc->uri_name);

  1121           mythtvsrc->uri_name = NULL;

  1122         }

  1123         mythtvsrc->uri_name = g_value_dup_string(value);

  1124         break;

  1125       case PROP_GMYTHTV_VERSION:

  1126         mythtvsrc->mythtv_version = g_value_get_int(value);

  1127         break;

  1128       case PROP_GMYTHTV_LIVEID:

  1129         mythtvsrc->live_tv_id = g_value_get_int(value);

  1130         break;

  1131       case PROP_GMYTHTV_LIVE:

  1132         mythtvsrc->live_tv = g_value_get_boolean(value);

  1133         break;

  1134       case PROP_GMYTHTV_ENABLE_TIMING_POSITION:

  1135          mythtvsrc->enable_timing_position = g_value_get_boolean(value);

  1136          break;

  1137       case PROP_GMYTHTV_LIVE_CHAINID:

  1138          if (!g_value_get_string(value)) {

  1139             GST_WARNING_OBJECT(object, "MythTV Live chainid property cannot be NULL");

  1140             break;

  1141          }

  1143          if (mythtvsrc->live_chain_id != NULL) {

  1144            g_free(mythtvsrc->live_chain_id);

  1145            mythtvsrc->live_chain_id = NULL;

  1146          }

  1147          mythtvsrc->live_chain_id = g_value_dup_string(value);

  1148          break;

  1149       case PROP_GMYTHTV_CHANNEL_NUM:

  1150         mythtvsrc->channel_name = g_value_dup_string(value);

  1151         break;

  1152       default:

  1153         G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);

  1154         break;

  1155     }

  1157     GST_OBJECT_UNLOCK(mythtvsrc);

  1158 }

  1160 static void

  1161 gst_mythtv_src_get_property(GObject * object, guint prop_id,

  1162                             GValue * value, GParamSpec * pspec)

  1163 {

  1164     GstMythtvSrc   *mythtvsrc = GST_MYTHTV_SRC(object);

  1166     GST_OBJECT_LOCK(mythtvsrc);

  1167     switch (prop_id) {

  1168       case PROP_LOCATION:

  1169         g_value_set_string(value, mythtvsrc->uri_name);

  1170         break;

  1171       case PROP_GMYTHTV_VERSION:

  1172         g_value_set_int(value, mythtvsrc->mythtv_version);

  1173         break;

  1174       case PROP_GMYTHTV_LIVEID:

  1175         g_value_set_int(value, mythtvsrc->live_tv_id);

  1176         break;

  1177       case PROP_GMYTHTV_LIVE:

  1178         g_value_set_boolean(value, mythtvsrc->live_tv);

  1179         break;

  1180       case PROP_GMYTHTV_ENABLE_TIMING_POSITION:

  1181         g_value_set_boolean(value, mythtvsrc->enable_timing_position);

  1182         break;

  1183       case PROP_GMYTHTV_LIVE_CHAINID:

  1184         g_value_set_string(value, mythtvsrc->live_chain_id);

  1185         break;

  1186       case PROP_GMYTHTV_CHANNEL_NUM:

  1187         g_value_set_string(value, mythtvsrc->channel_name);

  1188         break;

  1189     default:

  1190         G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);

  1191         break;

  1192     }

  1193     GST_OBJECT_UNLOCK(mythtvsrc);

  1194 }

  1196 static gboolean

  1197 plugin_init(GstPlugin * plugin)

  1198 {

  1199     return gst_element_register(plugin, "mythtvsrc", GST_RANK_NONE,

  1200                                 GST_TYPE_MYTHTV_SRC);

  1201 }

  1203 GST_PLUGIN_DEFINE(GST_VERSION_MAJOR,

  1204                   GST_VERSION_MINOR,

  1205                   "mythtv",

  1206                   "lib MythTV src",

  1207                   plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME,

  1208                   GST_PACKAGE_ORIGIN);

  1211 /*** GSTURIHANDLER INTERFACE *************************************************/

  1212 static guint

  1213 gst_mythtv_src_uri_get_type(void)

  1214 {

  1215     return GST_URI_SRC;

  1216 }

  1218 static gchar  **

  1219 gst_mythtv_src_uri_get_protocols(void)

  1220 {

  1221     static gchar   *protocols[] = { "myth", "myths", NULL };

  1223     return protocols;

  1224 }

  1226 static const gchar *

  1227 gst_mythtv_src_uri_get_uri(GstURIHandler * handler)

  1228 {

  1229     GstMythtvSrc   *src = GST_MYTHTV_SRC(handler);

  1231     return src->uri_name;

  1232 }

  1234 static gboolean

  1235 gst_mythtv_src_uri_set_uri(GstURIHandler * handler, const gchar * uri)

  1236 {

  1237     GstMythtvSrc   *src = GST_MYTHTV_SRC(handler);

  1239     gchar          *protocol;

  1241     protocol = gst_uri_get_protocol(uri);

  1242     if ((strcmp(protocol, "myth") != 0)

  1243         && (strcmp(protocol, "myths") != 0)) {

  1244         g_free(protocol);

  1245         return FALSE;

  1246     }

  1247     g_free(protocol);

  1248     g_object_set(src, "location", uri, NULL);

  1250     return TRUE;

  1251 }

  1253 static void

  1254 gst_mythtv_src_uri_handler_init(gpointer g_iface, gpointer iface_data)

  1255 {

  1256     GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;

  1258     iface->get_type = gst_mythtv_src_uri_get_type;

  1259     iface->get_protocols = gst_mythtv_src_uri_get_protocols;

  1260     iface->get_uri = gst_mythtv_src_uri_get_uri;

  1261     iface->set_uri = gst_mythtv_src_uri_set_uri;

  1262 }

  1264 void

  1265 size_header_handler(void *userdata, const char *value)

  1266 {

  1267     GstMythtvSrc   *src = GST_MYTHTV_SRC(userdata);

  1269     GST_DEBUG_OBJECT(src, "content size = %lld bytes", src->content_size);

  1270 }

author	renatofilho
	Tue Aug 21 16:04:44 2007 +0100 (2007-08-21)
branch	trunk
changeset 815	7f290a3a34b1
parent 758	b57cdd5fb898
child 822	c517a78bf7bf
permissions	-rwxr-xr-x