gst-play.c 33 KB
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/* GStreamer command line playback testing utility
 *
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 * Copyright (C) 2013-2014 Tim-Philipp Müller <tim centricular net>
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 * Copyright (C) 2013 Collabora Ltd.
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 * Copyright (C) 2015 Centricular Ltd
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 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

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#include <locale.h>

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#include <gst/gst.h>
#include <gst/gst-i18n-app.h>
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#include <gst/audio/audio.h>
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#include <gst/video/video.h>
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#include <gst/pbutils/pbutils.h>
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#include <gst/tag/tag.h>
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#include <gst/math-compat.h>
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#include <stdlib.h>
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#include <stdio.h>
#include <string.h>

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#include <glib/gprintf.h>

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#include "gst-play-kb.h"
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#define VOLUME_STEPS 20

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GST_DEBUG_CATEGORY (play_debug);
#define GST_CAT_DEFAULT play_debug

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typedef enum
{
  GST_PLAY_TRICK_MODE_NONE = 0,
  GST_PLAY_TRICK_MODE_DEFAULT,
  GST_PLAY_TRICK_MODE_DEFAULT_NO_AUDIO,
  GST_PLAY_TRICK_MODE_KEY_UNITS,
  GST_PLAY_TRICK_MODE_KEY_UNITS_NO_AUDIO,
  GST_PLAY_TRICK_MODE_LAST
} GstPlayTrickMode;

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typedef enum
{
  GST_PLAY_TRACK_TYPE_INVALID = 0,
  GST_PLAY_TRACK_TYPE_AUDIO,
  GST_PLAY_TRACK_TYPE_VIDEO,
  GST_PLAY_TRACK_TYPE_SUBTITLE
} GstPlayTrackType;

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typedef struct
{
  gchar **uris;
  guint num_uris;
  gint cur_idx;

  GstElement *playbin;

  GMainLoop *loop;
  guint bus_watch;
  guint timeout;

  /* missing plugin messages */
  GList *missing;

  gboolean buffering;
  gboolean is_live;
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  GstState desired_state;       /* as per user interaction, PAUSED or PLAYING */

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  /* configuration */
  gboolean gapless;
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  GstPlayTrickMode trick_mode;
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  gdouble rate;
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} GstPlay;

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static gboolean quiet = FALSE;

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static gboolean play_bus_msg (GstBus * bus, GstMessage * msg, gpointer data);
static gboolean play_next (GstPlay * play);
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static gboolean play_prev (GstPlay * play);
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static gboolean play_timeout (gpointer user_data);
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static void play_about_to_finish (GstElement * playbin, gpointer user_data);
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static void play_reset (GstPlay * play);
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static void play_set_relative_volume (GstPlay * play, gdouble volume_step);
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static gboolean play_do_seek (GstPlay * play, gint64 pos, gdouble rate,
    GstPlayTrickMode mode);
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/* *INDENT-OFF* */
static void gst_play_printf (const gchar * format, ...) G_GNUC_PRINTF (1, 2);
/* *INDENT-ON* */

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static void keyboard_cb (const gchar * key_input, gpointer user_data);
static void relative_seek (GstPlay * play, gdouble percent);

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static void
gst_play_printf (const gchar * format, ...)
{
  gchar *str = NULL;
  va_list args;
  int len;

  if (quiet)
    return;

  va_start (args, format);

  len = g_vasprintf (&str, format, args);

  va_end (args);

  if (len > 0 && str != NULL)
    g_print ("%s", str);

  g_free (str);
}

#define g_print gst_play_printf

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static GstPlay *
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play_new (gchar ** uris, const gchar * audio_sink, const gchar * video_sink,
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    gboolean gapless, gdouble initial_volume)
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{
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  GstElement *sink, *playbin;
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  GstPlay *play;

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  playbin = gst_element_factory_make ("playbin", "playbin");
  if (playbin == NULL)
    return NULL;

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  play = g_new0 (GstPlay, 1);

  play->uris = uris;
  play->num_uris = g_strv_length (uris);
  play->cur_idx = -1;

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  play->playbin = playbin;
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  if (audio_sink != NULL) {
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    if (strchr (audio_sink, ' ') != NULL)
      sink = gst_parse_bin_from_description (audio_sink, TRUE, NULL);
    else
      sink = gst_element_factory_make (audio_sink, NULL);

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    if (sink != NULL)
      g_object_set (play->playbin, "audio-sink", sink, NULL);
    else
      g_warning ("Couldn't create specified audio sink '%s'", audio_sink);
  }
  if (video_sink != NULL) {
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    if (strchr (video_sink, ' ') != NULL)
      sink = gst_parse_bin_from_description (video_sink, TRUE, NULL);
    else
      sink = gst_element_factory_make (video_sink, NULL);

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    if (sink != NULL)
      g_object_set (play->playbin, "video-sink", sink, NULL);
    else
      g_warning ("Couldn't create specified video sink '%s'", video_sink);
  }

  play->loop = g_main_loop_new (NULL, FALSE);

  play->bus_watch = gst_bus_add_watch (GST_ELEMENT_BUS (play->playbin),
      play_bus_msg, play);

  /* FIXME: make configurable incl. 0 for disable */
  play->timeout = g_timeout_add (100, play_timeout, play);

  play->missing = NULL;
  play->buffering = FALSE;
  play->is_live = FALSE;

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  play->desired_state = GST_STATE_PLAYING;

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  play->gapless = gapless;
  if (gapless) {
    g_signal_connect (play->playbin, "about-to-finish",
        G_CALLBACK (play_about_to_finish), play);
  }

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  if (initial_volume != -1)
    play_set_relative_volume (play, initial_volume - 1.0);
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  play->rate = 1.0;
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  play->trick_mode = GST_PLAY_TRICK_MODE_NONE;
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  return play;
}

static void
play_free (GstPlay * play)
{
  play_reset (play);

  gst_element_set_state (play->playbin, GST_STATE_NULL);
  gst_object_unref (play->playbin);

  g_source_remove (play->bus_watch);
  g_source_remove (play->timeout);
  g_main_loop_unref (play->loop);

  g_strfreev (play->uris);
  g_free (play);
}

/* reset for new file/stream */
static void
play_reset (GstPlay * play)
{
  g_list_foreach (play->missing, (GFunc) gst_message_unref, NULL);
  play->missing = NULL;

  play->buffering = FALSE;
  play->is_live = FALSE;
}

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static void
play_set_relative_volume (GstPlay * play, gdouble volume_step)
{
  gdouble volume;

  volume = gst_stream_volume_get_volume (GST_STREAM_VOLUME (play->playbin),
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      GST_STREAM_VOLUME_FORMAT_CUBIC);
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  volume = round ((volume + volume_step) * VOLUME_STEPS) / VOLUME_STEPS;
  volume = CLAMP (volume, 0.0, 10.0);

  gst_stream_volume_set_volume (GST_STREAM_VOLUME (play->playbin),
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      GST_STREAM_VOLUME_FORMAT_CUBIC, volume);
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  g_print (_("Volume: %.0f%%"), volume * 100);
  g_print ("                  \n");
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}

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/* returns TRUE if something was installed and we should restart playback */
static gboolean
play_install_missing_plugins (GstPlay * play)
{
  /* FIXME: implement: try to install any missing plugins we haven't
   * tried to install before */
  return FALSE;
}

static gboolean
play_bus_msg (GstBus * bus, GstMessage * msg, gpointer user_data)
{
  GstPlay *play = user_data;

  switch (GST_MESSAGE_TYPE (msg)) {
    case GST_MESSAGE_ASYNC_DONE:
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      /* dump graph on preroll */
      GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (play->playbin),
          GST_DEBUG_GRAPH_SHOW_ALL, "gst-play.async-done");

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      g_print ("Prerolled.\r");
      if (play->missing != NULL && play_install_missing_plugins (play)) {
        g_print ("New plugins installed, trying again...\n");
        --play->cur_idx;
        play_next (play);
      }
      break;
    case GST_MESSAGE_BUFFERING:{
      gint percent;

      if (!play->buffering)
        g_print ("\n");

      gst_message_parse_buffering (msg, &percent);
      g_print ("%s %d%%  \r", _("Buffering..."), percent);

      if (percent == 100) {
        /* a 100% message means buffering is done */
        if (play->buffering) {
          play->buffering = FALSE;
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          /* no state management needed for live pipelines */
          if (!play->is_live)
            gst_element_set_state (play->playbin, play->desired_state);
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        }
      } else {
        /* buffering... */
        if (!play->buffering) {
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          if (!play->is_live)
            gst_element_set_state (play->playbin, GST_STATE_PAUSED);
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          play->buffering = TRUE;
        }
      }
      break;
    }
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    case GST_MESSAGE_CLOCK_LOST:{
      g_print (_("Clock lost, selecting a new one\n"));
      gst_element_set_state (play->playbin, GST_STATE_PAUSED);
      gst_element_set_state (play->playbin, GST_STATE_PLAYING);
      break;
    }
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    case GST_MESSAGE_LATENCY:
      g_print ("Redistribute latency...\n");
      gst_bin_recalculate_latency (GST_BIN (play->playbin));
      break;
    case GST_MESSAGE_REQUEST_STATE:{
      GstState state;
      gchar *name;

      name = gst_object_get_path_string (GST_MESSAGE_SRC (msg));

      gst_message_parse_request_state (msg, &state);

      g_print ("Setting state to %s as requested by %s...\n",
          gst_element_state_get_name (state), name);

      gst_element_set_state (play->playbin, state);
      g_free (name);
      break;
    }
    case GST_MESSAGE_EOS:
      /* print final position at end */
      play_timeout (play);
      g_print ("\n");
      /* and switch to next item in list */
      if (!play_next (play)) {
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        g_print ("%s\n", _("Reached end of play list."));
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        g_main_loop_quit (play->loop);
      }
      break;
    case GST_MESSAGE_WARNING:{
      GError *err;
      gchar *dbg = NULL;

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      /* dump graph on warning */
      GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (play->playbin),
          GST_DEBUG_GRAPH_SHOW_ALL, "gst-play.warning");

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      gst_message_parse_warning (msg, &err, &dbg);
      g_printerr ("WARNING %s\n", err->message);
      if (dbg != NULL)
        g_printerr ("WARNING debug information: %s\n", dbg);
      g_error_free (err);
      g_free (dbg);
      break;
    }
    case GST_MESSAGE_ERROR:{
      GError *err;
      gchar *dbg;

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      /* dump graph on error */
      GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (play->playbin),
          GST_DEBUG_GRAPH_SHOW_ALL, "gst-play.error");

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      gst_message_parse_error (msg, &err, &dbg);
      g_printerr ("ERROR %s for %s\n", err->message, play->uris[play->cur_idx]);
      if (dbg != NULL)
        g_printerr ("ERROR debug information: %s\n", dbg);
      g_error_free (err);
      g_free (dbg);

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      /* flush any other error messages from the bus and clean up */
      gst_element_set_state (play->playbin, GST_STATE_NULL);

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      if (play->missing != NULL && play_install_missing_plugins (play)) {
        g_print ("New plugins installed, trying again...\n");
        --play->cur_idx;
        play_next (play);
        break;
      }
      /* try next item in list then */
      if (!play_next (play)) {
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        g_print ("%s\n", _("Reached end of play list."));
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        g_main_loop_quit (play->loop);
      }
      break;
    }
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    case GST_MESSAGE_ELEMENT:
    {
      GstNavigationMessageType mtype = gst_navigation_message_get_type (msg);
      if (mtype == GST_NAVIGATION_MESSAGE_EVENT) {
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        GstEvent *ev = NULL;
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        if (gst_navigation_message_parse_event (msg, &ev)) {
          GstNavigationEventType e_type = gst_navigation_event_get_type (ev);
          switch (e_type) {
            case GST_NAVIGATION_EVENT_KEY_PRESS:
            {
              const gchar *key;
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              if (gst_navigation_event_parse_key_event (ev, &key)) {
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                GST_INFO ("Key press: %s", key);

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                if (strcmp (key, "Left") == 0)
                  key = GST_PLAY_KB_ARROW_LEFT;
                else if (strcmp (key, "Right") == 0)
                  key = GST_PLAY_KB_ARROW_RIGHT;
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                else if (strcmp (key, "Up") == 0)
                  key = GST_PLAY_KB_ARROW_UP;
                else if (strcmp (key, "Down") == 0)
                  key = GST_PLAY_KB_ARROW_DOWN;
                else if (strcmp (key, "space") == 0)
                  key = " ";
                else if (strlen (key) > 1)
                  break;

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                keyboard_cb (key, user_data);
              }
              break;
            }
            case GST_NAVIGATION_EVENT_MOUSE_BUTTON_PRESS:
            {
              gint button;
              if (gst_navigation_event_parse_mouse_button_event (ev, &button,
                      NULL, NULL)) {
                if (button == 4) {
                  /* wheel up */
                  relative_seek (play, +0.08);
                } else if (button == 5) {
                  /* wheel down */
                  relative_seek (play, -0.01);
                }
              }
              break;
            }
            default:
              break;
          }
        }
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        if (ev)
          gst_event_unref (ev);
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      }
      break;
    }
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    default:
      if (gst_is_missing_plugin_message (msg)) {
        gchar *desc;

        desc = gst_missing_plugin_message_get_description (msg);
        g_print ("Missing plugin: %s\n", desc);
        g_free (desc);
        play->missing = g_list_append (play->missing, gst_message_ref (msg));
      }
      break;
  }

  return TRUE;
}

static gboolean
play_timeout (gpointer user_data)
{
  GstPlay *play = user_data;
  gint64 pos = -1, dur = -1;
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  const gchar *paused = _("Paused");
  gchar *status;
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  if (play->buffering)
    return TRUE;

  gst_element_query_position (play->playbin, GST_FORMAT_TIME, &pos);
  gst_element_query_duration (play->playbin, GST_FORMAT_TIME, &dur);

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  if (play->desired_state == GST_STATE_PAUSED) {
    status = (gchar *) paused;
  } else {
    gint len = g_utf8_strlen (paused, -1);
    status = g_newa (gchar, len + 1);
    memset (status, ' ', len);
    status[len] = '\0';
  }
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  if (pos >= 0 && dur > 0) {
    gchar dstr[32], pstr[32];

    /* FIXME: pretty print in nicer format */
    g_snprintf (pstr, 32, "%" GST_TIME_FORMAT, GST_TIME_ARGS (pos));
    pstr[9] = '\0';
    g_snprintf (dstr, 32, "%" GST_TIME_FORMAT, GST_TIME_ARGS (dur));
    dstr[9] = '\0';
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    g_print ("%s / %s %s\r", pstr, dstr, status);
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  }

  return TRUE;
}

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static gchar *
play_uri_get_display_name (GstPlay * play, const gchar * uri)
{
  gchar *loc;

  if (gst_uri_has_protocol (uri, "file")) {
    loc = g_filename_from_uri (uri, NULL, NULL);
  } else if (gst_uri_has_protocol (uri, "pushfile")) {
    loc = g_filename_from_uri (uri + 4, NULL, NULL);
  } else {
    loc = g_strdup (uri);
  }

  /* Maybe additionally use glib's filename to display name function */
  return loc;
}

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static void
play_uri (GstPlay * play, const gchar * next_uri)
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{
  gchar *loc;

  gst_element_set_state (play->playbin, GST_STATE_READY);
  play_reset (play);

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  loc = play_uri_get_display_name (play, next_uri);
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  g_print (_("Now playing %s\n"), loc);
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  g_free (loc);

  g_object_set (play->playbin, "uri", next_uri, NULL);

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  switch (gst_element_set_state (play->playbin, GST_STATE_PAUSED)) {
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    case GST_STATE_CHANGE_FAILURE:
      /* ignore, we should get an error message posted on the bus */
      break;
    case GST_STATE_CHANGE_NO_PREROLL:
      g_print ("Pipeline is live.\n");
      play->is_live = TRUE;
      break;
    case GST_STATE_CHANGE_ASYNC:
      g_print ("Prerolling...\r");
      break;
    default:
      break;
  }
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  if (play->desired_state != GST_STATE_PAUSED)
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    gst_element_set_state (play->playbin, play->desired_state);
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}

/* returns FALSE if we have reached the end of the playlist */
static gboolean
play_next (GstPlay * play)
{
  if ((play->cur_idx + 1) >= play->num_uris)
    return FALSE;
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  play_uri (play, play->uris[++play->cur_idx]);
  return TRUE;
}

/* returns FALSE if we have reached the beginning of the playlist */
static gboolean
play_prev (GstPlay * play)
{
  if (play->cur_idx == 0 || play->num_uris <= 1)
    return FALSE;

  play_uri (play, play->uris[--play->cur_idx]);
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  return TRUE;
}

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static void
play_about_to_finish (GstElement * playbin, gpointer user_data)
{
  GstPlay *play = user_data;
  const gchar *next_uri;
  gchar *loc;
  guint next_idx;

  if (!play->gapless)
    return;

  next_idx = play->cur_idx + 1;
  if (next_idx >= play->num_uris)
    return;

  next_uri = play->uris[next_idx];
  loc = play_uri_get_display_name (play, next_uri);
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  g_print (_("About to finish, preparing next title: %s"), loc);
  g_print ("\n");
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  g_free (loc);

  g_object_set (play->playbin, "uri", next_uri, NULL);
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  play->cur_idx = next_idx;
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}

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static void
do_play (GstPlay * play)
{
  gint i;

  /* dump playlist */
  for (i = 0; i < play->num_uris; ++i)
    GST_INFO ("%4u : %s", i, play->uris[i]);

  if (!play_next (play))
    return;

  g_main_loop_run (play->loop);
}

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static gint
compare (gconstpointer a, gconstpointer b)
{
  gchar *a1, *b1;
  gint ret;

  a1 = g_utf8_collate_key_for_filename ((gchar *) a, -1);
  b1 = g_utf8_collate_key_for_filename ((gchar *) b, -1);
  ret = strcmp (a1, b1);
  g_free (a1);
  g_free (b1);

  return ret;
}

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static void
add_to_playlist (GPtrArray * playlist, const gchar * filename)
{
  GDir *dir;
  gchar *uri;

  if (gst_uri_is_valid (filename)) {
    g_ptr_array_add (playlist, g_strdup (filename));
    return;
  }

  if ((dir = g_dir_open (filename, 0, NULL))) {
    const gchar *entry;
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    GList *l, *files = NULL;
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    while ((entry = g_dir_read_name (dir))) {
      gchar *path;

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      path = g_build_filename (filename, entry, NULL);
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      files = g_list_insert_sorted (files, path, compare);
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    }

    g_dir_close (dir);
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    for (l = files; l != NULL; l = l->next) {
      gchar *path = (gchar *) l->data;

      add_to_playlist (playlist, path);
      g_free (path);
    }
    g_list_free (files);
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    return;
  }

  uri = gst_filename_to_uri (filename, NULL);
  if (uri != NULL)
    g_ptr_array_add (playlist, uri);
  else
    g_warning ("Could not make URI out of filename '%s'", filename);
}

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static void
shuffle_uris (gchar ** uris, guint num)
{
  gchar *tmp;
  guint i, j;

  if (num < 2)
    return;

  for (i = 0; i < num; i++) {
    /* gets equally distributed random number in 0..num-1 [0;num[ */
    j = g_random_int_range (0, num);
    tmp = uris[j];
    uris[j] = uris[i];
    uris[i] = tmp;
  }
}

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static void
restore_terminal (void)
{
  gst_play_kb_set_key_handler (NULL, NULL);
}

static void
toggle_paused (GstPlay * play)
{
  if (play->desired_state == GST_STATE_PLAYING)
    play->desired_state = GST_STATE_PAUSED;
  else
    play->desired_state = GST_STATE_PLAYING;

  if (!play->buffering) {
    gst_element_set_state (play->playbin, play->desired_state);
  } else if (play->desired_state == GST_STATE_PLAYING) {
    g_print ("\nWill play as soon as buffering finishes)\n");
  }
}

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static void
relative_seek (GstPlay * play, gdouble percent)
{
  GstQuery *query;
  gboolean seekable = FALSE;
711
  gint64 dur = -1, pos = -1, step;
712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729

  g_return_if_fail (percent >= -1.0 && percent <= 1.0);

  if (!gst_element_query_position (play->playbin, GST_FORMAT_TIME, &pos))
    goto seek_failed;

  query = gst_query_new_seeking (GST_FORMAT_TIME);
  if (!gst_element_query (play->playbin, query)) {
    gst_query_unref (query);
    goto seek_failed;
  }

  gst_query_parse_seeking (query, NULL, &seekable, NULL, &dur);
  gst_query_unref (query);

  if (!seekable || dur <= 0)
    goto seek_failed;

730 731 732 733 734
  step = dur * percent;
  if (ABS (step) < GST_SECOND)
    step = (percent < 0) ? -GST_SECOND : GST_SECOND;

  pos = pos + step;
735 736
  if (pos > dur) {
    if (!play_next (play)) {
737
      g_print ("\n%s\n", _("Reached end of play list."));
738 739 740 741 742
      g_main_loop_quit (play->loop);
    }
  } else {
    if (pos < 0)
      pos = 0;
743 744

    play_do_seek (play, pos, play->rate, play->trick_mode);
745 746 747 748 749 750 751 752 753 754
  }

  return;

seek_failed:
  {
    g_print ("\nCould not seek.\n");
  }
}

755 756 757
static gboolean
play_set_rate_and_trick_mode (GstPlay * play, gdouble rate,
    GstPlayTrickMode mode)
758 759 760
{
  gint64 pos = -1;

761
  g_return_val_if_fail (rate != 0, FALSE);
762 763

  if (!gst_element_query_position (play->playbin, GST_FORMAT_TIME, &pos))
764
    return FALSE;
765

766 767 768 769 770 771 772 773 774 775 776
  return play_do_seek (play, pos, rate, mode);
}

static gboolean
play_do_seek (GstPlay * play, gint64 pos, gdouble rate, GstPlayTrickMode mode)
{
  GstSeekFlags seek_flags;
  GstQuery *query;
  GstEvent *seek;
  gboolean seekable = FALSE;

777 778 779
  query = gst_query_new_seeking (GST_FORMAT_TIME);
  if (!gst_element_query (play->playbin, query)) {
    gst_query_unref (query);
780
    return FALSE;
781 782 783 784 785 786
  }

  gst_query_parse_seeking (query, NULL, &seekable, NULL, NULL);
  gst_query_unref (query);

  if (!seekable)
787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808
    return FALSE;

  seek_flags = GST_SEEK_FLAG_FLUSH;

  switch (mode) {
    case GST_PLAY_TRICK_MODE_DEFAULT:
      seek_flags |= GST_SEEK_FLAG_TRICKMODE;
      break;
    case GST_PLAY_TRICK_MODE_DEFAULT_NO_AUDIO:
      seek_flags |= GST_SEEK_FLAG_TRICKMODE | GST_SEEK_FLAG_TRICKMODE_NO_AUDIO;
      break;
    case GST_PLAY_TRICK_MODE_KEY_UNITS:
      seek_flags |= GST_SEEK_FLAG_TRICKMODE_KEY_UNITS;
      break;
    case GST_PLAY_TRICK_MODE_KEY_UNITS_NO_AUDIO:
      seek_flags |=
          GST_SEEK_FLAG_TRICKMODE_KEY_UNITS | GST_SEEK_FLAG_TRICKMODE_NO_AUDIO;
      break;
    case GST_PLAY_TRICK_MODE_NONE:
    default:
      break;
  }
809

810
  if (rate >= 0)
811
    seek = gst_event_new_seek (rate, GST_FORMAT_TIME,
812
        seek_flags | GST_SEEK_FLAG_ACCURATE,
813
        /* start */ GST_SEEK_TYPE_SET, pos,
814
        /* stop */ GST_SEEK_TYPE_SET, GST_CLOCK_TIME_NONE);
815 816
  else
    seek = gst_event_new_seek (rate, GST_FORMAT_TIME,
817
        seek_flags | GST_SEEK_FLAG_ACCURATE,
818 819 820 821
        /* start */ GST_SEEK_TYPE_SET, 0,
        /* stop */ GST_SEEK_TYPE_SET, pos);

  if (!gst_element_send_event (play->playbin, seek))
822
    return FALSE;
823

824 825 826 827
  play->rate = rate;
  play->trick_mode = mode;
  return TRUE;
}
828

829 830 831 832
static void
play_set_playback_rate (GstPlay * play, gdouble rate)
{
  if (play_set_rate_and_trick_mode (play, rate, play->trick_mode)) {
833 834
    g_print (_("Playback rate: %.2f"), rate);
    g_print ("                               \n");
835
  } else {
836 837 838
    g_print ("\n");
    g_print (_("Could not change playback rate to %.2f"), rate);
    g_print (".\n");
839 840 841
  }
}

842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891
static void
play_set_relative_playback_rate (GstPlay * play, gdouble rate_step,
    gboolean reverse_direction)
{
  gdouble new_rate = play->rate + rate_step;

  if (reverse_direction)
    new_rate *= -1.0;

  play_set_playback_rate (play, new_rate);
}

static const gchar *
trick_mode_get_description (GstPlayTrickMode mode)
{
  switch (mode) {
    case GST_PLAY_TRICK_MODE_NONE:
      return "normal playback, trick modes disabled";
    case GST_PLAY_TRICK_MODE_DEFAULT:
      return "trick mode: default";
    case GST_PLAY_TRICK_MODE_DEFAULT_NO_AUDIO:
      return "trick mode: default, no audio";
    case GST_PLAY_TRICK_MODE_KEY_UNITS:
      return "trick mode: key frames only";
    case GST_PLAY_TRICK_MODE_KEY_UNITS_NO_AUDIO:
      return "trick mode: key frames only, no audio";
    default:
      break;
  }
  return "unknown trick mode";
}

static void
play_switch_trick_mode (GstPlay * play)
{
  GstPlayTrickMode new_mode = ++play->trick_mode;
  const gchar *mode_desc;

  if (new_mode == GST_PLAY_TRICK_MODE_LAST)
    new_mode = GST_PLAY_TRICK_MODE_NONE;

  mode_desc = trick_mode_get_description (new_mode);

  if (play_set_rate_and_trick_mode (play, play->rate, new_mode)) {
    g_print ("Rate: %.2f (%s)                      \n", play->rate, mode_desc);
  } else {
    g_print ("\nCould not change trick mode to %s.\n", mode_desc);
  }
}

892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951
static void
play_cycle_track_selection (GstPlay * play, GstPlayTrackType track_type)
{
  const gchar *prop_cur, *prop_n, *prop_get, *name;
  gint cur = -1, n = -1;

  switch (track_type) {
    case GST_PLAY_TRACK_TYPE_AUDIO:
      prop_get = "get-audio-tags";
      prop_cur = "current-audio";
      prop_n = "n-audio";
      name = "audio";
      break;
    case GST_PLAY_TRACK_TYPE_VIDEO:
      prop_get = "get-video-tags";
      prop_cur = "current-video";
      prop_n = "n-video";
      name = "video";
      break;
    case GST_PLAY_TRACK_TYPE_SUBTITLE:
      prop_get = "get-text-tags";
      prop_cur = "current-text";
      prop_n = "n-text";
      name = "subtitle";
      break;
    default:
      return;
  }

  g_object_get (play->playbin, prop_cur, &cur, prop_n, &n, NULL);

  if (n < 1) {
    g_print ("No %s tracks.\n", name);
  } else if (n == 1) {
    g_print ("No other %s tracks to switch to.\n", name);
  } else {
    gchar *lcode = NULL, *lname = NULL;
    const gchar *lang = NULL;
    GstTagList *tags = NULL;

    cur = (cur + 1) % n;
    g_signal_emit_by_name (play->playbin, prop_get, cur, &tags);
    if (tags != NULL) {
      if (gst_tag_list_get_string (tags, GST_TAG_LANGUAGE_CODE, &lcode))
        lang = gst_tag_get_language_name (lcode);
      else if (gst_tag_list_get_string (tags, GST_TAG_LANGUAGE_NAME, &lname))
        lang = lname;
      gst_tag_list_unref (tags);
    }
    if (lang != NULL)
      g_print ("Switching to %s track %d of %d (%s).\n", name, cur + 1, n,
          lang);
    else
      g_print ("Switching to %s track %d of %d.\n", name, cur + 1, n);
    g_object_set (play->playbin, prop_cur, cur, NULL);
    g_free (lcode);
    g_free (lname);
  }
}

952 953 954
static void
print_keyboard_help (void)
{
955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972
  static struct
  {
    const gchar *key_desc;
    const gchar *key_help;
  } key_controls[] = {
    {
    N_("space"), N_("pause/unpause")}, {
    N_("q or ESC"), N_("quit")}, {
    ">", N_("play next")}, {
    "<", N_("play previous")}, {
    "\342\206\222", N_("seek forward")}, {
    "\342\206\220", N_("seek backward")}, {
    "\342\206\221", N_("volume up")}, {
    "\342\206\223", N_("volume down")}, {
    "+", N_("increase playback rate")}, {
    "-", N_("decrease playback rate")}, {
    "d", N_("change playback direction")}, {
    "t", N_("enable/disable trick modes")}, {
973 974 975
    "a", N_("change audio track")}, {
    "v", N_("change video track")}, {
    "s", N_("change subtitle track")}, {
976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993
  "k", N_("show keyboard shortcuts")},};
  guint i, chars_to_pad, desc_len, max_desc_len = 0;

  g_print ("\n\n%s\n\n", _("Interactive mode - keyboard controls:"));

  for (i = 0; i < G_N_ELEMENTS (key_controls); ++i) {
    desc_len = g_utf8_strlen (key_controls[i].key_desc, -1);
    max_desc_len = MAX (max_desc_len, desc_len);
  }
  ++max_desc_len;

  for (i = 0; i < G_N_ELEMENTS (key_controls); ++i) {
    chars_to_pad = max_desc_len - g_utf8_strlen (key_controls[i].key_desc, -1);
    g_print ("\t%s", key_controls[i].key_desc);
    g_print ("%-*s: ", chars_to_pad, "");
    g_print ("%s\n", key_controls[i].key_help);
  }
  g_print ("\n");
994 995
}

996 997 998 999
static void
keyboard_cb (const gchar * key_input, gpointer user_data)
{
  GstPlay *play = (GstPlay *) user_data;
1000 1001 1002 1003 1004
  gchar key = '\0';

  /* only want to switch/case on single char, not first char of string */
  if (key_input[0] != '\0' && key_input[1] == '\0')
    key = g_ascii_tolower (key_input[0]);
1005

1006
  switch (key) {
1007 1008 1009
    case 'k':
      print_keyboard_help ();
      break;
1010 1011 1012
    case ' ':
      toggle_paused (play);
      break;
1013 1014 1015 1016
    case 'q':
    case 'Q':
      g_main_loop_quit (play->loop);
      break;
1017 1018
    case '>':
      if (!play_next (play)) {
1019
        g_print ("\n%s\n", _("Reached end of play list."));
1020 1021 1022 1023 1024 1025
        g_main_loop_quit (play->loop);
      }
      break;
    case '<':
      play_prev (play);
      break;
1026
    case '+':
1027
      if (play->rate > -0.2 && play->rate < 0.0)
1028
        play_set_relative_playback_rate (play, 0.0, TRUE);
1029
      else if (ABS (play->rate) < 2.0)
1030
        play_set_relative_playback_rate (play, 0.1, FALSE);
1031
      else if (ABS (play->rate) < 4.0)
1032
        play_set_relative_playback_rate (play, 0.5, FALSE);
1033
      else
1034
        play_set_relative_playback_rate (play, 1.0, FALSE);
1035 1036
      break;
    case '-':
1037 1038 1039 1040
      if (play->rate > 0.0 && play->rate < 0.20)
        play_set_relative_playback_rate (play, 0.0, TRUE);
      else if (ABS (play->rate) <= 2.0)
        play_set_relative_playback_rate (play, -0.1, FALSE);
1041
      else if (ABS (play->rate) <= 4.0)
1042
        play_set_relative_playback_rate (play, -0.5, FALSE);
1043
      else
1044
        play_set_relative_playback_rate (play, -1.0, FALSE);
1045 1046
      break;
    case 'd':
1047 1048 1049 1050
      play_set_relative_playback_rate (play, 0.0, TRUE);
      break;
    case 't':
      play_switch_trick_mode (play);
1051
      break;
1052
    case 27:                   /* ESC */
1053 1054 1055 1056
      if (key_input[1] == '\0') {
        g_main_loop_quit (play->loop);
        break;
      }
1057 1058 1059 1060 1061 1062 1063 1064 1065
    case 'a':
      play_cycle_track_selection (play, GST_PLAY_TRACK_TYPE_AUDIO);
      break;
    case 'v':
      play_cycle_track_selection (play, GST_PLAY_TRACK_TYPE_VIDEO);
      break;
    case 's':
      play_cycle_track_selection (play, GST_PLAY_TRACK_TYPE_SUBTITLE);
      break;
1066
      /* fall through */
1067
    default:
1068 1069 1070 1071
      if (strcmp (key_input, GST_PLAY_KB_ARROW_RIGHT) == 0) {
        relative_seek (play, +0.08);
      } else if (strcmp (key_input, GST_PLAY_KB_ARROW_LEFT) == 0) {
        relative_seek (play, -0.01);
1072 1073 1074 1075
      } else if (strcmp (key_input, GST_PLAY_KB_ARROW_UP) == 0) {
        play_set_relative_volume (play, +1.0 / VOLUME_STEPS);
      } else if (strcmp (key_input, GST_PLAY_KB_ARROW_DOWN) == 0) {
        play_set_relative_volume (play, -1.0 / VOLUME_STEPS);
1076 1077 1078 1079 1080
      } else {
        GST_INFO ("keyboard input:");
        for (; *key_input != '\0'; ++key_input)
          GST_INFO ("  code %3d", *key_input);
      }
1081 1082 1083 1084
      break;
  }
}

1085 1086 1087 1088 1089 1090
int
main (int argc, char **argv)
{
  GstPlay *play;
  GPtrArray *playlist;
  gboolean print_version = FALSE;
1091
  gboolean interactive = TRUE;
1092
  gboolean gapless = FALSE;
1093
  gboolean shuffle = FALSE;
1094
  gdouble volume = -1;
1095 1096 1097 1098 1099 1100 1101
  gchar **filenames = NULL;
  gchar *audio_sink = NULL;
  gchar *video_sink = NULL;
  gchar **uris;
  guint num, i;
  GError *err = NULL;
  GOptionContext *ctx;
1102
  gchar *playlist_file = NULL;
1103 1104 1105 1106 1107 1108 1109
  GOptionEntry options[] = {
    {"version", 0, 0, G_OPTION_ARG_NONE, &print_version,
        N_("Print version information and exit"), NULL},
    {"videosink", 0, 0, G_OPTION_ARG_STRING, &video_sink,
        N_("Video sink to use (default is autovideosink)"), NULL},
    {"audiosink", 0, 0, G_OPTION_ARG_STRING, &audio_sink,
        N_("Audio sink to use (default is autoaudiosink)"), NULL},
1110 1111
    {"gapless", 0, 0, G_OPTION_ARG_NONE, &gapless,
        N_("Enable gapless playback"), NULL},
1112 1113
    {"shuffle", 0, 0, G_OPTION_ARG_NONE, &shuffle,
        N_("Shuffle playlist"), NULL},
1114 1115 1116
    {"no-interactive", 0, G_OPTION_FLAG_REVERSE, G_OPTION_ARG_NONE,
          &interactive,
        N_("Disable interactive control via the keyboard"), NULL},
1117 1118
    {"volume", 0, 0, G_OPTION_ARG_DOUBLE, &volume,
        N_("Volume"), NULL},
1119 1120
    {"playlist", 0, 0, G_OPTION_ARG_FILENAME, &playlist_file,
        N_("Playlist file containing input media files"), NULL},
1121 1122
    {"quiet", 'q', 0, G_OPTION_ARG_NONE, &quiet,
        N_("Do not print any output (apart from errors)"), NULL},
1123 1124 1125 1126
    {G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &filenames, NULL},
    {NULL}
  };

1127 1128
  setlocale (LC_ALL, "");

1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155
#ifdef ENABLE_NLS
  bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
  bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
  textdomain (GETTEXT_PACKAGE);
#endif

  g_set_prgname ("gst-play-" GST_API_VERSION);

  ctx = g_option_context_new ("FILE1|URI1 [FILE2|URI2] [FILE3|URI3] ...");
  g_option_context_add_main_entries (ctx, options, GETTEXT_PACKAGE);
  g_option_context_add_group (ctx, gst_init_get_option_group ());
  if (!g_option_context_parse (ctx, &argc, &argv, &err)) {
    g_print ("Error initializing: %s\n", GST_STR_NULL (err->message));
    return 1;
  }
  g_option_context_free (ctx);

  GST_DEBUG_CATEGORY_INIT (play_debug, "play", 0, "gst-play");

  if (print_version) {
    gchar *version_str;

    version_str = gst_version_string ();
    g_print ("%s version %s\n", g_get_prgname (), PACKAGE_VERSION);
    g_print ("%s\n", version_str);
    g_print ("%s\n", GST_PACKAGE_ORIGIN);
    g_free (version_str);
1156 1157 1158

    g_free (audio_sink);
    g_free (video_sink);
1159
    g_free (playlist_file);
1160

1161 1162 1163
    return 0;
  }

1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186
  playlist = g_ptr_array_new ();

  if (playlist_file != NULL) {
    gchar *playlist_contents = NULL;
    gchar **lines = NULL;

    if (g_file_get_contents (playlist_file, &playlist_contents, NULL, &err)) {
      lines = g_strsplit (playlist_contents, "\n", 0);
      num = g_strv_length (lines);

      for (i = 0; i < num; i++) {
        if (lines[i][0] != '\0') {
          GST_LOG ("Playlist[%d]: %s", i + 1, lines[i]);
          add_to_playlist (playlist, lines[i]);
        }
      }
      g_strfreev (lines);
      g_free (playlist_contents);
    } else {
      g_printerr ("Could not read playlist: %s\n", err->message);
      g_clear_error (&err);
    }
    g_free (playlist_file);
1187
    playlist_file = NULL;
1188 1189 1190
  }

  if (playlist->len == 0 && (filenames == NULL || *filenames == NULL)) {
1191 1192 1193 1194 1195
    g_printerr (_("Usage: %s FILE1|URI1 [FILE2|URI2] [FILE3|URI3] ..."),
        "gst-play-" GST_API_VERSION);
    g_printerr ("\n\n"),
        g_printerr ("%s\n\n",
        _("You must provide at least one filename or URI to play."));
1196 1197
    /* No input provided. Free array */
    g_ptr_array_free (playlist, TRUE);
1198 1199 1200 1201

    g_free (audio_sink);
    g_free (video_sink);

1202 1203 1204 1205
    return 1;
  }

  /* fill playlist */
1206 1207 1208 1209 1210 1211 1212
  if (filenames != NULL && *filenames != NULL) {
    num = g_strv_length (filenames);
    for (i = 0; i < num; ++i) {
      GST_LOG ("command line argument: %s", filenames[i]);
      add_to_playlist (playlist, filenames[i]);
    }
    g_strfreev (filenames);
1213 1214
  }

1215
  num = playlist->len;
1216 1217 1218
  g_ptr_array_add (playlist, NULL);

  uris = (gchar **) g_ptr_array_free (playlist, FALSE);
1219 1220 1221 1222

  if (shuffle)
    shuffle_uris (uris, num);

1223
  /* prepare */
1224
  play = play_new (uris, audio_sink, video_sink, gapless, volume);
1225

1226 1227 1228 1229 1230 1231
  if (play == NULL) {
    g_printerr
        ("Failed to create 'playbin' element. Check your GStreamer installation.\n");
    return EXIT_FAILURE;
  }

1232 1233
  if (interactive) {
    if (gst_play_kb_set_key_handler (keyboard_cb, play)) {
1234
      g_print (_("Press 'k' to see a list of keyboard shortcuts.\n"));
1235 1236 1237 1238 1239 1240 1241
      atexit (restore_terminal);
    } else {
      g_print ("Interactive keyboard handling in terminal not available.\n");
    }
  }

  /* play */
1242 1243 1244 1245 1246
  do_play (play);

  /* clean up */
  play_free (play);

1247 1248 1249
  g_free (audio_sink);
  g_free (video_sink);