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gstreamer/tools/gst-play.c
Tim-Philipp Müller 2b0e71f4de tools: gst-play: seek at least in steps of a second 
In case of very short files we might end up seeking in
steps of a fraction of a second, which is silly and gives
the impression that seeking doesn't actually work. Make
minimum seek step a second instead.
2015-07-24 10:15:21 +01:00

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/* GStreamer command line playback testing utility
*
* Copyright (C) 2013-2014 Tim-Philipp Müller <tim centricular net>
* Copyright (C) 2013 Collabora Ltd.
* Copyright (C) 2015 Centricular Ltd
*
* 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
#include <locale.h>
#include <gst/gst.h>
#include <gst/gst-i18n-app.h>
#include <gst/audio/audio.h>
#include <gst/video/video.h>
#include <gst/pbutils/pbutils.h>
#include <gst/tag/tag.h>
#include <gst/math-compat.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <glib/gprintf.h>
#include "gst-play-kb.h"
#define VOLUME_STEPS 20
GST_DEBUG_CATEGORY (play_debug);
#define GST_CAT_DEFAULT play_debug
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;
typedef enum
{
GST_PLAY_TRACK_TYPE_INVALID = 0,
GST_PLAY_TRACK_TYPE_AUDIO,
GST_PLAY_TRACK_TYPE_VIDEO,
GST_PLAY_TRACK_TYPE_SUBTITLE
} GstPlayTrackType;
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;
GstState desired_state; /* as per user interaction, PAUSED or PLAYING */
/* configuration */
gboolean gapless;
GstPlayTrickMode trick_mode;
gdouble rate;
} GstPlay;
static gboolean quiet = FALSE;
static gboolean play_bus_msg (GstBus * bus, GstMessage * msg, gpointer data);
static gboolean play_next (GstPlay * play);
static gboolean play_prev (GstPlay * play);
static gboolean play_timeout (gpointer user_data);
static void play_about_to_finish (GstElement * playbin, gpointer user_data);
static void play_reset (GstPlay * play);
static void play_set_relative_volume (GstPlay * play, gdouble volume_step);
static gboolean play_do_seek (GstPlay * play, gint64 pos, gdouble rate,
GstPlayTrickMode mode);
/* *INDENT-OFF* */
static void gst_play_printf (const gchar * format, ...) G_GNUC_PRINTF (1, 2);
/* *INDENT-ON* */
static void keyboard_cb (const gchar * key_input, gpointer user_data);
static void relative_seek (GstPlay * play, gdouble percent);
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
static GstPlay *
play_new (gchar ** uris, const gchar * audio_sink, const gchar * video_sink,
gboolean gapless, gdouble initial_volume)
{
GstElement *sink, *playbin;
GstPlay *play;
playbin = gst_element_factory_make ("playbin", "playbin");
if (playbin == NULL)
return NULL;
play = g_new0 (GstPlay, 1);
play->uris = uris;
play->num_uris = g_strv_length (uris);
play->cur_idx = -1;
play->playbin = playbin;
if (audio_sink != NULL) {
if (strchr (audio_sink, ' ') != NULL)
sink = gst_parse_bin_from_description (audio_sink, TRUE, NULL);
else
sink = gst_element_factory_make (audio_sink, NULL);
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) {
if (strchr (video_sink, ' ') != NULL)
sink = gst_parse_bin_from_description (video_sink, TRUE, NULL);
else
sink = gst_element_factory_make (video_sink, NULL);
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;
play->desired_state = GST_STATE_PLAYING;
play->gapless = gapless;
if (gapless) {
g_signal_connect (play->playbin, "about-to-finish",
G_CALLBACK (play_about_to_finish), play);
}
if (initial_volume != -1)
play_set_relative_volume (play, initial_volume - 1.0);
play->rate = 1.0;
play->trick_mode = GST_PLAY_TRICK_MODE_NONE;
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;
}
static void
play_set_relative_volume (GstPlay * play, gdouble volume_step)
{
gdouble volume;
volume = gst_stream_volume_get_volume (GST_STREAM_VOLUME (play->playbin),
GST_STREAM_VOLUME_FORMAT_CUBIC);
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),
GST_STREAM_VOLUME_FORMAT_CUBIC, volume);
g_print (_("Volume: %.0f%%"), volume * 100);
g_print (" \n");
}
/* 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:
/* 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");
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;
/* no state management needed for live pipelines */
if (!play->is_live)
gst_element_set_state (play->playbin, play->desired_state);
}
} else {
/* buffering... */
if (!play->buffering) {
if (!play->is_live)
gst_element_set_state (play->playbin, GST_STATE_PAUSED);
play->buffering = TRUE;
}
}
break;
}
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;
}
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)) {
g_print ("%s\n", _("Reached end of play list."));
g_main_loop_quit (play->loop);
}
break;
case GST_MESSAGE_WARNING:{
GError *err;
gchar *dbg = NULL;
/* dump graph on warning */
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (play->playbin),
GST_DEBUG_GRAPH_SHOW_ALL, "gst-play.warning");
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;
/* dump graph on error */
GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS (GST_BIN (play->playbin),
GST_DEBUG_GRAPH_SHOW_ALL, "gst-play.error");
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);
/* flush any other error messages from the bus and clean up */
gst_element_set_state (play->playbin, GST_STATE_NULL);
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)) {
g_print ("%s\n", _("Reached end of play list."));
g_main_loop_quit (play->loop);
}
break;
}
case GST_MESSAGE_ELEMENT:
{
GstNavigationMessageType mtype = gst_navigation_message_get_type (msg);
if (mtype == GST_NAVIGATION_MESSAGE_EVENT) {
GstEvent *ev = NULL;
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;
if (gst_navigation_event_parse_key_event (ev, &key)) {
GST_INFO ("Key press: %s", key);
if (strcmp (key, "Left") == 0)
key = GST_PLAY_KB_ARROW_LEFT;
else if (strcmp (key, "Right") == 0)
key = GST_PLAY_KB_ARROW_RIGHT;
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;
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;
}
}
if (ev)
gst_event_unref (ev);
}
break;
}
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;
const gchar *paused = _("Paused");
gchar *status;
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);
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';
}
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';
g_print ("%s / %s %s\r", pstr, dstr, status);
}
return TRUE;
}
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;
}
static void
play_uri (GstPlay * play, const gchar * next_uri)
{
gchar *loc;
gst_element_set_state (play->playbin, GST_STATE_READY);
play_reset (play);
loc = play_uri_get_display_name (play, next_uri);
g_print (_("Now playing %s\n"), loc);
g_free (loc);
g_object_set (play->playbin, "uri", next_uri, NULL);
switch (gst_element_set_state (play->playbin, GST_STATE_PAUSED)) {
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;
}
if (play->desired_state != GST_STATE_PAUSED)
gst_element_set_state (play->playbin, play->desired_state);
}
/* 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;
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]);
return TRUE;
}
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);
g_print (_("About to finish, preparing next title: %s"), loc);
g_print ("\n");
g_free (loc);
g_object_set (play->playbin, "uri", next_uri, NULL);
play->cur_idx = next_idx;
}
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);
}
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;
}
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;
GList *l, *files = NULL;
while ((entry = g_dir_read_name (dir))) {
gchar *path;
path = g_strconcat (filename, G_DIR_SEPARATOR_S, entry, NULL);
files = g_list_insert_sorted (files, path, compare);
}
g_dir_close (dir);
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);
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);
}
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;
}
}
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");
}
}
static void
relative_seek (GstPlay * play, gdouble percent)
{
GstQuery *query;
gboolean seekable = FALSE;
gint64 dur = -1, pos = -1, step;
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;
step = dur * percent;
if (ABS (step) < GST_SECOND)
step = (percent < 0) ? -GST_SECOND : GST_SECOND;
pos = pos + step;
if (pos > dur) {
if (!play_next (play)) {
g_print ("\n%s\n", _("Reached end of play list."));
g_main_loop_quit (play->loop);
}
} else {
if (pos < 0)
pos = 0;
play_do_seek (play, pos, play->rate, play->trick_mode);
}
return;
seek_failed:
{
g_print ("\nCould not seek.\n");
}
}
static gboolean
play_set_rate_and_trick_mode (GstPlay * play, gdouble rate,
GstPlayTrickMode mode)
{
gint64 pos = -1;
g_return_val_if_fail (rate != 0, FALSE);
if (!gst_element_query_position (play->playbin, GST_FORMAT_TIME, &pos))
return FALSE;
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;
query = gst_query_new_seeking (GST_FORMAT_TIME);
if (!gst_element_query (play->playbin, query)) {
gst_query_unref (query);
return FALSE;
}
gst_query_parse_seeking (query, NULL, &seekable, NULL, NULL);
gst_query_unref (query);
if (!seekable)
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;
}
if (rate >= 0)
seek = gst_event_new_seek (rate, GST_FORMAT_TIME,
seek_flags | GST_SEEK_FLAG_ACCURATE,
/* start */ GST_SEEK_TYPE_SET, pos,
/* stop */ GST_SEEK_TYPE_SET, GST_CLOCK_TIME_NONE);
else
seek = gst_event_new_seek (rate, GST_FORMAT_TIME,
seek_flags | GST_SEEK_FLAG_ACCURATE,
/* start */ GST_SEEK_TYPE_SET, 0,
/* stop */ GST_SEEK_TYPE_SET, pos);
if (!gst_element_send_event (play->playbin, seek))
return FALSE;
play->rate = rate;
play->trick_mode = mode;
return TRUE;
}
static void
play_set_playback_rate (GstPlay * play, gdouble rate)
{
if (play_set_rate_and_trick_mode (play, rate, play->trick_mode)) {
g_print (_("Playback rate: %.2f"), rate);
g_print (" \n");
} else {
g_print ("\n");
g_print (_("Could not change playback rate to %.2f"), rate);
g_print (".\n");
}
}
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);
}
}
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);
}
}
static void
print_keyboard_help (void)
{
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")}, {
"a", N_("change audio track")}, {
"v", N_("change video track")}, {
"s", N_("change subtitle track")}, {
"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");
}
static void
keyboard_cb (const gchar * key_input, gpointer user_data)
{
GstPlay *play = (GstPlay *) user_data;
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]);
switch (key) {
case 'k':
print_keyboard_help ();
break;
case ' ':
toggle_paused (play);
break;
case 'q':
case 'Q':
g_main_loop_quit (play->loop);
break;
case '>':
if (!play_next (play)) {
g_print ("\n%s\n", _("Reached end of play list."));
g_main_loop_quit (play->loop);
}
break;
case '<':
play_prev (play);
break;
case '+':
if (play->rate > -0.2 && play->rate < 0.0)
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);
else if (ABS (play->rate) < 4.0)
play_set_relative_playback_rate (play, 0.5, FALSE);
else
play_set_relative_playback_rate (play, 1.0, FALSE);
break;
case '-':
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);
else if (ABS (play->rate) <= 4.0)
play_set_relative_playback_rate (play, -0.5, FALSE);
else
play_set_relative_playback_rate (play, -1.0, FALSE);
break;
case 'd':
play_set_relative_playback_rate (play, 0.0, TRUE);
break;
case 't':
play_switch_trick_mode (play);
break;
case 27: /* ESC */
if (key_input[1] == '\0') {
g_main_loop_quit (play->loop);
break;
}
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;
/* fall through */
default:
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);
} 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);
} else {
GST_INFO ("keyboard input:");
for (; *key_input != '\0'; ++key_input)
GST_INFO (" code %3d", *key_input);
}
break;
}
}
int
main (int argc, char **argv)
{
GstPlay *play;
GPtrArray *playlist;
gboolean print_version = FALSE;
gboolean interactive = TRUE;
gboolean gapless = FALSE;
gboolean shuffle = FALSE;
gdouble volume = -1;
gchar **filenames = NULL;
gchar *audio_sink = NULL;
gchar *video_sink = NULL;
gchar **uris;
guint num, i;
GError *err = NULL;
GOptionContext *ctx;
gchar *playlist_file = NULL;
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},
{"gapless", 0, 0, G_OPTION_ARG_NONE, &gapless,
N_("Enable gapless playback"), NULL},
{"shuffle", 0, 0, G_OPTION_ARG_NONE, &shuffle,
N_("Shuffle playlist"), NULL},
{"no-interactive", 0, G_OPTION_FLAG_REVERSE, G_OPTION_ARG_NONE,
&interactive,
N_("Disable interactive control via the keyboard"), NULL},
{"volume", 0, 0, G_OPTION_ARG_DOUBLE, &volume,
N_("Volume"), NULL},
{"playlist", 0, 0, G_OPTION_ARG_FILENAME, &playlist_file,
N_("Playlist file containing input media files"), NULL},
{"quiet", 'q', 0, G_OPTION_ARG_NONE, &quiet,
N_("Do not print any output (apart from errors)"), NULL},
{G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &filenames, NULL},
{NULL}
};
setlocale (LC_ALL, "");
#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);
g_free (audio_sink);
g_free (video_sink);
g_free (playlist_file);
return 0;
}
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);
playlist_file = NULL;
}
if (playlist->len == 0 && (filenames == NULL || *filenames == NULL)) {
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."));
/* No input provided. Free array */
g_ptr_array_free (playlist, TRUE);
g_free (audio_sink);
g_free (video_sink);
return 1;
}
/* fill playlist */
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);
}
num = playlist->len;
g_ptr_array_add (playlist, NULL);
uris = (gchar **) g_ptr_array_free (playlist, FALSE);
if (shuffle)
shuffle_uris (uris, num);
/* prepare */
play = play_new (uris, audio_sink, video_sink, gapless, volume);
if (play == NULL) {
g_printerr
("Failed to create 'playbin' element. Check your GStreamer installation.\n");
return EXIT_FAILURE;
}
if (interactive) {
if (gst_play_kb_set_key_handler (keyboard_cb, play)) {
g_print (_("Press 'k' to see a list of keyboard shortcuts.\n"));
atexit (restore_terminal);
} else {
g_print ("Interactive keyboard handling in terminal not available.\n");
}
}
/* play */
do_play (play);
/* clean up */
play_free (play);
g_free (audio_sink);
g_free (video_sink);
g_print ("\n");
return 0;
}
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