Fix spelling errors throughout codebase

CONTRIBUTING.md

@@ -1,6 +1,6 @@
 # How to contribute to UltraGrid
 First, thanks to contribute to UltraGrid by using UltraGrid, reporting bugs,
-adding code or ideas. Further section contains basic informations how to
+adding code or ideas. Further section contains basic information how to
 contribute. Feel free to inform us if you need to contribute in a different
 way or extend this document.
 
@@ -24,7 +24,7 @@ way or extend this document.
 
 ## Reporting bugs
 
-Prefered way to report a bug is to open an issue on GitHub. If not possible,
+Preferred way to report a bug is to open an issue on GitHub. If not possible,
 you can also contact the development team directly with an e-mail.
 
 Please look also at detailed instructions here [here](doc/REPORTING-BUGS.md).
@@ -46,7 +46,7 @@ The pull request should represent a coherent unit, like a single feature added.
 More features should be separated to multiple pull request (of course if possible
 and eg. not firmly bound together).
 
-The contained commits shouls present clearly what was changed. Ideally,
+The contained commits should present clearly what was changed. Ideally,
 if refactoring is done, it should not be mixed with functional changes
 in a single commit, similarly for the code movement.
 

README.md

@@ -133,7 +133,7 @@ Using the UltraGrid System
 
    The **\<capture_device\>** is one of the list viewed with `-t help`. Name
    of capture device usually follows with configuration of video mode,
-   video input etc. All options can be interactively dispayed using built-in
+   video input etc. All options can be interactively displayed using built-in
    help, eg. `-t decklink:help`.
 
    The **\<compression\>** specifies the selected video compression to be

cuda_dxt/rgb2dxt1.c

@@ -84,7 +84,7 @@ int main(int argc, char** argv) {
         return -1;
     }
 
-    /* prepare envents for time emasurement and begin */
+    /* prepare events for time emasurement and begin */
     cudaEventCreate(&event_end);
     cudaEventCreate(&event_begin);
     cudaEventRecord(event_begin, 0);

cuda_dxt/rgb2dxt6.c

@@ -80,7 +80,7 @@ int main(int argc, char** argv) {
         return -1;
     }
 
-    /* prepare envents for time emasurement and begin */
+    /* prepare events for time emasurement and begin */
     cudaEventCreate(&event_end);
     cudaEventCreate(&event_begin);
     cudaEventRecord(event_begin, 0);

doc/PERFORMANCE-TUNING.md

@@ -73,7 +73,7 @@ Display devices
 
    If you intend to use some of DXT compressions, recommended driver
    is OpenGL, which can display it natively. When using other display
-   drivers, decompression is still done throught OpenGL and then displayed
+   drivers, decompression is still done through OpenGL and then displayed
    with requested video driver.
 
 
@@ -87,7 +87,7 @@ Other Factors
 
    The UltraGrid system will attempt to enable POSIX real-time scheduling
    to improve performance. This behaviour is disabled by default now, because
-   it can occupy the whole system when enabled, but it can be stil enabled by
+   it can occupy the whole system when enabled, but it can be still enabled by
    '--enable-rt' configure option. If you see the message:
 
         WARNING: Unable to set real-time scheduling

doc/REPORTING-BUGS.md

@@ -5,7 +5,7 @@ There are couple of ways to report a problem:
   - you can use [GitHub issues](https://github.com/CESNET/UltraGrid/issues)
     for reporting bugs. You need to register, but it is only matter
     of filling username and password.
-  - alternativey you can use our an e-mail conference ultragrid-dev _\_at\__
+  - alternatively you can use our an e-mail conference ultragrid-dev _\_at\__
     cesnet.cz which leads to developers of UltraGrid
   - if not sure if the problem is a bug, you can also use
     [GitHub discussions](https://github.com/CESNET/UltraGrid/discussions)
@@ -63,7 +63,7 @@ to collect data about a computer and attach its result (Linux/macOS).
 a _core dump_ (if generated) and the _binary_ (if you compiled by yourself,
 otherwise the _executable version_). If core dump is not generated, a
 _backtrace_ (see below) might have been generated to standard error output so
-please attach this. Also the terminal output containg the _error context_ would
+please attach this. Also the terminal output containing the _error context_ would
 be helpful.
 
 ## Decoding stacktrace (Linux)

dxt_compress/dxt_common.h

@@ -102,7 +102,7 @@ dxt_init();
 /**
  * Load RGB image from file
  * 
- * @param filaname Image filename
+ * @param filename Image filename
  * @param width Image width in pixels
  * @param height Image height in pixels
  * @return image data buffer or zero if fails
@@ -113,7 +113,7 @@ dxt_image_load_from_file(const char* filename, int width, int height, DXT_IMAGE_
 /**
  * Load RGB image from file
  * 
- * @param filaname Image filename
+ * @param filename Image filename
  * @param width Image width in pixels
  * @param height Image height in pixels
  * @return image data buffer or zero if fails
@@ -124,7 +124,7 @@ dxt_image_save_to_file(const char* filename, DXT_IMAGE_TYPE* image, int width, i
 /**
  * Load compressed image from file
  * 
- * @param filaname Image filename
+ * @param filename Image filename
  * @param width Image width in pixels
  * @param height Image height in pixels
  * @return 0 if succeeds, otherwise nonzero

gui/QT/util/control_port.cpp

@@ -12,7 +12,7 @@ ControlPort::ControlPort(){
 }
 
 void ControlPort::connect(int local_port){
-	/* Prevents failure in case the socket is alredy connecting. This also
+	/* Prevents failure in case the socket is already connecting. This also
 	 * discards pending data in the send buffer, but we don't care about
 	 * that.*/
 	socket.abort();

ldgm/matrix-gen/ldpc-matrix.cpp

@@ -43,7 +43,7 @@ void left_matrix_init ( char **matrix, int k, int n, int N1, int seed )
     int j;                      /* Column index */
     int h;                      /* Temporary variable */
     int t;                      /* Left limit within the list of possible choices u[] */
-    int u[3*LDGM_MAX_K];            /* A table used to have a homogenous 1 distribution. */
+    int u[3*LDGM_MAX_K];            /* A table used to have a homogeneous 1 distribution. */
 
     Rand_pmms rand_gen;
     rand_gen.seedi(seed);
@@ -53,13 +53,13 @@ void left_matrix_init ( char **matrix, int k, int n, int N1, int seed )
 	u[h] = h % (n-k);
     }
 
-    /*  Initialize the matrix with N1 "1s" per column, homogenously */
+    /*  Initialize the matrix with N1 "1s" per column, homogeneously */
     t = 0;
     for ( j = 0; j < k; j++ )                   /* for each source symbol column */
     {
 	for ( h = 0; h < N1; h++ )              /* put N1 "1s" */
 	{
-	    /*  Check wether valid available choices remain */
+	    /*  Check whether valid available choices remain */
 	    for ( i = t; i < N1*k && matrix [u[i]] [j] ; i++);
 	    if ( i < N1*k )
 	    {

ldgm/src/ldgm-session-cpu.cpp

@@ -298,7 +298,7 @@ LDGM_session_cpu::decode_frame ( char* received, int buf_size, int* frame_size,
 
     /*      for(map<int, Node>::iterator it = graph.nodes.begin(); it != graph.nodes.end(); ++it) {
      *      Node n = it->second;
-     *      printf ( "neigbours of %d (count %lu): ", it->first, (it->second).neighbours.size() );
+     *      printf ( "neighbours of %d (count %lu): ", it->first, (it->second).neighbours.size() );
      *      for(vector<int>::iterator itr = n.neighbours.begin(); itr != n.neighbours.end(); ++itr)
      *          printf ( "%d ", *itr );
      *      printf ( "\n" );
@@ -395,7 +395,7 @@ LDGM_session_cpu::decode_frame ( char* received, int buf_size, int* frame_size,
     int iter = 0;
 
     while ( needs_decoding(&graph) && iter < 4) {
-//	printf ( "iteratin\n" );
+//	printf ( "iterating\n" );
         iterate(&graph);
         iter++;
     }

ldgm/src/ldgm-session-gpu.h

@@ -3,7 +3,7 @@
  *
  *       Filename:  ldgm-session-gpu.h
  *
- *    Description:  GPU implementation fo LDGM coding
+ *    Description:  GPU implementation of LDGM coding
  *
  *        Version:  1.0
  *        Created:  04/12/2012 12:54:51 PM

ldgm/src/main.cpp

@@ -108,7 +108,7 @@ main ( int argc, char *argv[] )
 		else if ( isprint ( optopt))
 		    fprintf ( stderr, "Unknown option '-%c'.\n", optopt);
 		else
-		    fprintf ( stderr, "Uknown option character '\\x%x'.\n", optopt);
+		    fprintf ( stderr, "Unknown option character '\\x%x'.\n", optopt);
 
 		return 1;
 	    default:
@@ -194,7 +194,7 @@ demo(int k, int m, int frame_size, char* matrix_fname, char* data_fname, int cpu
     for ( int i = 0; i < frame_size; ++i)
 	memset((char*)data+i, rand() % 256, 1);
 
-    //alocate space for parity packets
+    //allocate space for parity packets
 
 //    void *parity;
     //allocate memory with address aligned to 16 bytes

ldgm/src/tanner.cpp

@@ -55,7 +55,7 @@ int Node::setDataPtr(char *d) {
 
 
 /*-----------------------------------------------------------------------------
- *  Implementation fo class Edge
+ *  Implementation of class Edge
  *-----------------------------------------------------------------------------*/
 
 Edge::Edge(Node *a, Node *b) {
@@ -65,7 +65,7 @@ Edge::Edge(Node *a, Node *b) {
 
 
 /*-----------------------------------------------------------------------------
- *  Implementation fo class Tanner_graph
+ *  Implementation of class Tanner_graph
  *-----------------------------------------------------------------------------*/
 void Tanner_graph::set_data_size(int size) {
     data_size = size;

nat-helper/room.cpp

@@ -79,7 +79,7 @@ void Room::onClientCandidate(Client& client, CompletionStatus status){
 		return;
 	}
 
-	std::cout << "Client candidate recieved" << std::endl;
+	std::cout << "Client candidate received" << std::endl;
 
 	for(auto& [c, cu] : clients){
 		if(&client == c)

src/audio/audio.cpp

@@ -268,8 +268,8 @@ sdp_send_change_address_message(struct module           *root,
 
 /**
  * take care that addrs can also be comma-separated list of addresses !
- * @retval  0 state succesfully initialized
- * @retval <0 error occured
+ * @retval  0 state successfully initialized
+ * @retval <0 error occurred
  * @retval >0 success but no state was created (eg. help printed)
  */
 int audio_init(struct state_audio **ret,
@@ -446,7 +446,7 @@ int audio_init(struct state_audio **ret,
                 s->receiver = NET_JACK;
 #endif
         } else if (s->audio_tx_mode != 0) {
-                log_msg(LOG_LEVEL_ERROR, "Unknow audio protocol: %s\n", opt->proto);
+                log_msg(LOG_LEVEL_ERROR, "Unknown audio protocol: %s\n", opt->proto);
                 goto error;
         }
 
@@ -891,7 +891,7 @@ static struct response *audio_sender_process_message(struct state_audio *s, stru
                                 exit_uv(0);
                         } else {
                                 LOG(LOG_LEVEL_ERROR)
-                                    << "[control] Unable to initalize FEC!\n";
+                                    << "[control] Unable to initialize FEC!\n";
                         }
                         return new_response(RESPONSE_INT_SERV_ERR, nullptr);
                 }

src/audio/capture/jack.c

@@ -233,7 +233,7 @@ static void * audio_cap_jack_init(struct module *parent, const char *cfg)
         s->data = ring_buffer_init(s->frame.max_size);
 
         if (s->libjack->set_sample_rate_callback(s->client, jack_samplerate_changed_callback, (void *) s)) {
-                log_msg(LOG_LEVEL_ERROR, MOD_NAME "Registring callback problem.\n");
+                log_msg(LOG_LEVEL_ERROR, MOD_NAME "Registering callback problem.\n");
                 goto release_client;
         }
 

src/audio/capture/sdl_mixer.c

@@ -38,7 +38,7 @@
  * @file
  * @todo errata (SDL3 vs SDL2)
  * 1. 1 channel capture (-a ch=1) seem no longer work but there is a workaround
- * 2. unsufficient performance (generates overflow even in default config)
+ * 2. insufficient performance (generates overflow even in default config)
  */
 
 #include "config.h"               // for HAVE_SDL3
@@ -263,7 +263,7 @@ static void * audio_cap_sdl_mixer_init(struct module *parent, const char *cfg)
         if( Mix_OpenAudio(SDL_MIXER_SAMPLE_RATE, audio_format,
                                 s->audio.ch_count, 4096 ) == -1 ) {
 #endif
-                log_msg(LOG_LEVEL_ERROR, MOD_NAME "error initalizing sound: %s\n", Mix_GetError());
+                log_msg(LOG_LEVEL_ERROR, MOD_NAME "error initializing sound: %s\n", Mix_GetError());
                 goto error;
         }
         adjust_ch_count(s);

src/audio/codec/libavcodec.c

@@ -224,7 +224,7 @@ ADD_TO_PARAM("audio-lavc-decoder", "* audio-lavc-decoder=<decoder_name>\n"
 ADD_TO_PARAM("audio-lavc-encoder", "* audio-lavc-encoder=<encoder_name>\n"
                 "  Use selected audio lavc encoder\n");
 /**
- * Initializates selected audio codec
+ * Initializes selected audio codec
  * @param audio_codec requested audio codec
  * @param direction   which direction will be used (encoding or decoding)
  * @param silent      if true no error messages will be printed.
@@ -330,7 +330,7 @@ get_bitrate(struct libavcodec_codec_state *s)
         const int default_rate =
             mapping[s->output_channel.codec].default_bitrate;
         if (default_rate > 0) {
-                MSG(INFO, "Setting defaulat bit rate: %d bps\n", default_rate);
+                MSG(INFO, "Setting default bit rate: %d bps\n", default_rate);
                 return default_rate;
         }
         return 0;

src/audio/echo.cpp

@@ -153,7 +153,7 @@ struct echo_cancellation * echo_cancellation_init(void)
         s->frame.data = NULL;
         s->frame.sample_rate = s->frame.bps = 0;
 
-        const int ringbuf_sample_count = 2 << 15; //should be divisable by SAMPLES_PER_FRAME
+        const int ringbuf_sample_count = 2 << 15; //should be divisible by SAMPLES_PER_FRAME
         constexpr int bps = 2; //TODO: assuming bps to be 2
 
         s->far_end_ringbuf.reset(ring_buffer_init(ringbuf_sample_count * bps));
@@ -264,7 +264,7 @@ struct audio_frame * echo_cancel(struct echo_cancellation *s, struct audio_frame
         if(s->next_expected_near < steady_clock::now()){
                 /* It is possible that the capture thread starts late or
                  * freezes, which could create an unwanted delay between far
-                 * and near ends.  To partialy protect against this, drop the
+                 * and near ends.  To partially protect against this, drop the
                  * contents of far end buffer, when the last frame arrived more
                  * than 1s ago.
                  */

src/audio/export.c

@@ -123,7 +123,7 @@ static bool configure(struct audio_export *s, struct audio_desc fmt) {
         s->saved_format = fmt;
 
         if ((s->wav = wav_writer_create(s->filename, fmt)) == NULL) {
-                fprintf(stderr, "[Audio export] Error writting header!\n");
+                fprintf(stderr, "[Audio export] Error writing header!\n");
                 return false;
         }
 

src/audio/filter/delay.cpp

@@ -198,7 +198,7 @@ static af_result_code filter(void *state, struct audio_frame **frame){
                 //Write the last delay_size bytes to buffer
                 ring_buffer_write(s->ring.get(), f->data + excess_size, s->delay_size);
 
-                //Move the beggining of frame to the end and prepend delay_size bytes from buffer
+                //Move the beginning of frame to the end and prepend delay_size bytes from buffer
                 memmove(f->data + s->delay_size, f->data, excess_size);
                 ring_buffer_read(s->ring.get(), f->data, s->delay_size);
         }

src/audio/jack.c

@@ -166,7 +166,7 @@ void reconfigure_send_ch_count(struct state_jack *s, int ch_count)
         while (ports[i]) ++i;
 
         if(i < s->out_channel_count) {
-                log_msg(LOG_LEVEL_ERROR, MOD_NAME "Not enought output ports found matching pattern '%s': "
+                log_msg(LOG_LEVEL_ERROR, MOD_NAME "Not enough output ports found matching pattern '%s': "
                                 "%d requested, %d found\n", s->out_port_pattern, s->record.ch_count, i);
                 log_msg(LOG_LEVEL_WARNING, MOD_NAME "Reducing port count to %d\n", i);
                 s->out_channel_count = i;
@@ -246,7 +246,7 @@ static int attach_input_ports(struct state_jack *s)
 
          while (ports[i]) ++i;
          if(i < s->record.ch_count) {
-                 log_msg(LOG_LEVEL_ERROR, MOD_NAME "Not enought input ports found matching pattern '%s': "
+                 log_msg(LOG_LEVEL_ERROR, MOD_NAME "Not enough input ports found matching pattern '%s': "
                                  "%d requested, %d found\n", s->in_port_pattern, s->record.ch_count, i);
                  log_msg(LOG_LEVEL_ERROR, MOD_NAME "Reducing port count to %d\n", i);
                  s->record.ch_count = i;
@@ -382,8 +382,8 @@ void jack_send(void *state, struct audio_frame *frame)
  *
  * @param[in]  state state returned by jack_init()
  * @param[out] data  @ref pbuf_audio_data
- * @retval     true  if some data are receied
- * @retval     false if no data were receied
+ * @retval     true  if some data are received
+ * @retval     false if no data were received
  */
 bool jack_receive(void *state, void *data)
 {

src/audio/playback/alsa.c

@@ -38,7 +38,7 @@
 /*
  * Changes should use Safe ALSA API (http://0pointer.de/blog/projects/guide-to-sound-apis).
  *
- * Please, report all differencies from it here:
+ * Please, report all differences from it here:
  * - used format SND_PCM_FORMAT_S24_LE
  * - used "default" device for arbitrary number of channels
  */

src/audio/playback/coreaudio.cpp

@@ -363,7 +363,7 @@ void audio_ca_probe(struct device_info **available_devices, int *count, int dir)
  * @briew tries to get device id from device name
  * @param name  name of the device to be looked up
  * @param dir   direction - @sa audio_ca_probe for values;
- *              dir is needed only for deafult device names
+ *              dir is needed only for default device names
  */
 AudioDeviceID
 audio_ca_get_device_by_name(const char *name, int dir)

src/audio/playback/mixer.cpp

@@ -179,7 +179,7 @@ class generic_mix_algo {
 };
 
 /**
- * In this mixer, no normalization takes place. After mixing and substracting each
+ * In this mixer, no normalization takes place. After mixing and subtracting each
  * participant signal, values are clamped (there is no point doing it prior that -
  * non-normalized mixed value can be out-of-bounds while resulting value with
  * substracted with substracted source may be ok.
@@ -420,7 +420,7 @@ void state_audio_mixer::worker()
                         participant_index++;
                 }
 
-                // substract each source signal from the mix coming to that participant
+                // subtract each source signal from the mix coming to that participant
                 for (auto & pb : participant_frames) {
                         auto mix = mixed.begin();
                         sample_type_source *part = (sample_type_source *)(void *) pb.get_data(0);