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gstreamer/tools/gst-play.c
Vineeth T M eec791a37f tools: gst-play: fix seeking issue 
For positive seeking segment.stop value will be -1,
when we change rate to -1, then the stop value will be udpated
with the current position. And then again if we change rate to 1,
the segment.stop value does not get updated and remains as position
where we last changed rate to -1. Hence playback stops at that point.
In case of positive rates, call gst_element_new_seek with correct values

https://bugzilla.gnome.org/show_bug.cgi?id=751213
2015-06-19 10:09:24 -04:00

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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;
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;
}
}
}
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;
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;
pos = pos + dur * percent;
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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