ASTERISK-23919 #close Reported by Malcolm Davenport Review: https://reviewboard.asterisk.org/r/3802 git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@419592 65c4cc65-6c06-0410-ace0-fbb531ad65f3
689 lines
18 KiB
C
689 lines
18 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2013, Digium, Inc.
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*
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* David M. Lee, II <dlee@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief res_stasis playback support.
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*
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* \author David M. Lee, II <dlee@digium.com>
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*/
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/*** MODULEINFO
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<depend type="module">res_stasis</depend>
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<depend type="module">res_stasis_recording</depend>
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/app.h"
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#include "asterisk/astobj2.h"
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#include "asterisk/bridge.h"
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#include "asterisk/bridge_internal.h"
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#include "asterisk/file.h"
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#include "asterisk/logger.h"
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#include "asterisk/module.h"
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#include "asterisk/paths.h"
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#include "asterisk/stasis_app_impl.h"
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#include "asterisk/stasis_app_playback.h"
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#include "asterisk/stasis_app_recording.h"
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#include "asterisk/stasis_channels.h"
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#include "asterisk/stringfields.h"
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#include "asterisk/uuid.h"
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#include "asterisk/say.h"
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#include "asterisk/indications.h"
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/*! Number of hash buckets for playback container. Keep it prime! */
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#define PLAYBACK_BUCKETS 127
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/*! Default number of milliseconds of media to skip */
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#define PLAYBACK_DEFAULT_SKIPMS 3000
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#define SOUND_URI_SCHEME "sound:"
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#define RECORDING_URI_SCHEME "recording:"
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#define NUMBER_URI_SCHEME "number:"
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#define DIGITS_URI_SCHEME "digits:"
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#define CHARACTERS_URI_SCHEME "characters:"
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#define TONE_URI_SCHEME "tone:"
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/*! Container of all current playbacks */
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static struct ao2_container *playbacks;
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/*! Playback control object for res_stasis */
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struct stasis_app_playback {
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AST_DECLARE_STRING_FIELDS(
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AST_STRING_FIELD(id); /*!< Playback unique id */
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AST_STRING_FIELD(media); /*!< Playback media uri */
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AST_STRING_FIELD(language); /*!< Preferred language */
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AST_STRING_FIELD(target); /*!< Playback device uri */
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);
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/*! Control object for the channel we're playing back to */
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struct stasis_app_control *control;
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/*! Number of milliseconds to skip before playing */
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long offsetms;
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/*! Number of milliseconds to skip for forward/reverse operations */
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int skipms;
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/*! Number of milliseconds of media that has been played */
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long playedms;
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/*! Current playback state */
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enum stasis_app_playback_state state;
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/*! Set when the playback can be controlled */
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unsigned int controllable:1;
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};
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static struct ast_json *playback_to_json(struct stasis_message *message,
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const struct stasis_message_sanitizer *sanitize)
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{
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struct ast_channel_blob *channel_blob = stasis_message_data(message);
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struct ast_json *blob = channel_blob->blob;
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const char *state =
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ast_json_string_get(ast_json_object_get(blob, "state"));
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const char *type;
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if (!strcmp(state, "playing")) {
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type = "PlaybackStarted";
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} else if (!strcmp(state, "done")) {
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type = "PlaybackFinished";
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} else {
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return NULL;
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}
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return ast_json_pack("{s: s, s: O}",
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"type", type,
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"playback", blob);
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}
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STASIS_MESSAGE_TYPE_DEFN(stasis_app_playback_snapshot_type,
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.to_json = playback_to_json,
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);
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static void playback_dtor(void *obj)
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{
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struct stasis_app_playback *playback = obj;
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ast_string_field_free_memory(playback);
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}
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static struct stasis_app_playback *playback_create(
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struct stasis_app_control *control, const char *id)
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{
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RAII_VAR(struct stasis_app_playback *, playback, NULL, ao2_cleanup);
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char uuid[AST_UUID_STR_LEN];
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if (!control) {
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return NULL;
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}
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playback = ao2_alloc(sizeof(*playback), playback_dtor);
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if (!playback || ast_string_field_init(playback, 128)) {
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return NULL;
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}
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if (!ast_strlen_zero(id)) {
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ast_string_field_set(playback, id, id);
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} else {
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ast_uuid_generate_str(uuid, sizeof(uuid));
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ast_string_field_set(playback, id, uuid);
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}
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playback->control = control;
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ao2_ref(playback, +1);
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return playback;
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}
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static int playback_hash(const void *obj, int flags)
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{
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const struct stasis_app_playback *playback = obj;
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const char *id = flags & OBJ_KEY ? obj : playback->id;
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return ast_str_hash(id);
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}
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static int playback_cmp(void *obj, void *arg, int flags)
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{
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struct stasis_app_playback *lhs = obj;
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struct stasis_app_playback *rhs = arg;
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const char *rhs_id = flags & OBJ_KEY ? arg : rhs->id;
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if (strcmp(lhs->id, rhs_id) == 0) {
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return CMP_MATCH | CMP_STOP;
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} else {
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return 0;
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}
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}
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static const char *state_to_string(enum stasis_app_playback_state state)
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{
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switch (state) {
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case STASIS_PLAYBACK_STATE_QUEUED:
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return "queued";
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case STASIS_PLAYBACK_STATE_PLAYING:
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return "playing";
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case STASIS_PLAYBACK_STATE_PAUSED:
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return "paused";
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case STASIS_PLAYBACK_STATE_STOPPED:
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case STASIS_PLAYBACK_STATE_COMPLETE:
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case STASIS_PLAYBACK_STATE_CANCELED:
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/* It doesn't really matter how we got here, but all of these
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* states really just mean 'done' */
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return "done";
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case STASIS_PLAYBACK_STATE_MAX:
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break;
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}
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return "?";
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}
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static void playback_publish(struct stasis_app_playback *playback)
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{
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RAII_VAR(struct ast_json *, json, NULL, ast_json_unref);
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RAII_VAR(struct stasis_message *, message, NULL, ao2_cleanup);
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ast_assert(playback != NULL);
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json = stasis_app_playback_to_json(playback);
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if (json == NULL) {
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return;
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}
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message = ast_channel_blob_create_from_cache(
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stasis_app_control_get_channel_id(playback->control),
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stasis_app_playback_snapshot_type(), json);
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if (message == NULL) {
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return;
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}
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stasis_app_control_publish(playback->control, message);
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}
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static int playback_first_update(struct stasis_app_playback *playback,
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const char *uniqueid)
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{
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int res;
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SCOPED_AO2LOCK(lock, playback);
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if (playback->state == STASIS_PLAYBACK_STATE_CANCELED) {
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ast_log(LOG_NOTICE, "%s: Playback canceled for %s\n",
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uniqueid, playback->media);
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res = -1;
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} else {
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res = 0;
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playback->state = STASIS_PLAYBACK_STATE_PLAYING;
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}
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playback_publish(playback);
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return res;
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}
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static void playback_final_update(struct stasis_app_playback *playback,
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long playedms, int res, const char *uniqueid)
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{
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SCOPED_AO2LOCK(lock, playback);
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playback->playedms = playedms;
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if (res == 0) {
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playback->state = STASIS_PLAYBACK_STATE_COMPLETE;
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} else {
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if (playback->state == STASIS_PLAYBACK_STATE_STOPPED) {
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ast_log(LOG_NOTICE, "%s: Playback stopped for %s\n",
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uniqueid, playback->media);
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} else {
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ast_log(LOG_WARNING, "%s: Playback failed for %s\n",
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uniqueid, playback->media);
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playback->state = STASIS_PLAYBACK_STATE_STOPPED;
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}
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}
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playback_publish(playback);
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}
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static void play_on_channel(struct stasis_app_playback *playback,
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struct ast_channel *chan)
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{
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int res;
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long offsetms;
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/* Even though these local variables look fairly pointless, the avoid
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* having a bunch of NULL's passed directly into
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* ast_control_streamfile() */
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const char *fwd = NULL;
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const char *rev = NULL;
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const char *stop = NULL;
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const char *pause = NULL;
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const char *restart = NULL;
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ast_assert(playback != NULL);
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offsetms = playback->offsetms;
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res = playback_first_update(playback, ast_channel_uniqueid(chan));
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if (res != 0) {
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return;
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}
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if (ast_channel_state(chan) != AST_STATE_UP) {
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ast_indicate(chan, AST_CONTROL_PROGRESS);
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}
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if (ast_begins_with(playback->media, SOUND_URI_SCHEME)) {
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playback->controllable = 1;
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/* Play sound */
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res = ast_control_streamfile_lang(chan, playback->media + strlen(SOUND_URI_SCHEME),
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fwd, rev, stop, pause, restart, playback->skipms, playback->language,
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&offsetms);
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} else if (ast_begins_with(playback->media, RECORDING_URI_SCHEME)) {
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/* Play recording */
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RAII_VAR(struct stasis_app_stored_recording *, recording, NULL,
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ao2_cleanup);
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const char *relname =
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playback->media + strlen(RECORDING_URI_SCHEME);
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recording = stasis_app_stored_recording_find_by_name(relname);
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if (!recording) {
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ast_log(LOG_ERROR, "Attempted to play recording '%s' on channel '%s' but recording does not exist",
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relname, ast_channel_name(chan));
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return;
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}
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playback->controllable = 1;
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res = ast_control_streamfile_lang(chan,
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stasis_app_stored_recording_get_file(recording), fwd, rev, stop, pause,
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restart, playback->skipms, playback->language, &offsetms);
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} else if (ast_begins_with(playback->media, NUMBER_URI_SCHEME)) {
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int number;
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if (sscanf(playback->media + strlen(NUMBER_URI_SCHEME), "%30d", &number) != 1) {
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ast_log(LOG_ERROR, "Attempted to play number '%s' on channel '%s' but number is invalid",
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playback->media + strlen(NUMBER_URI_SCHEME), ast_channel_name(chan));
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return;
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}
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res = ast_say_number(chan, number, stop, playback->language, NULL);
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} else if (ast_begins_with(playback->media, DIGITS_URI_SCHEME)) {
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res = ast_say_digit_str(chan, playback->media + strlen(DIGITS_URI_SCHEME),
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stop, playback->language);
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} else if (ast_begins_with(playback->media, CHARACTERS_URI_SCHEME)) {
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res = ast_say_character_str(chan, playback->media + strlen(CHARACTERS_URI_SCHEME),
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stop, playback->language, AST_SAY_CASE_NONE);
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} else if (ast_begins_with(playback->media, TONE_URI_SCHEME)) {
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playback->controllable = 1;
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res = ast_control_tone(chan, playback->media + strlen(TONE_URI_SCHEME));
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} else {
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/* Play URL */
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ast_log(LOG_ERROR, "Attempted to play URI '%s' on channel '%s' but scheme is unsupported\n",
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playback->media, ast_channel_name(chan));
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return;
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}
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playback_final_update(playback, offsetms, res,
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ast_channel_uniqueid(chan));
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return;
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}
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/*!
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* \brief Special case code to play while a channel is in a bridge.
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*
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* \param bridge_channel The channel's bridge_channel.
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* \param playback_id Id of the playback to start.
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*/
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static void play_on_channel_in_bridge(struct ast_bridge_channel *bridge_channel,
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const char *playback_id)
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{
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RAII_VAR(struct stasis_app_playback *, playback, NULL, ao2_cleanup);
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playback = stasis_app_playback_find_by_id(playback_id);
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if (!playback) {
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ast_log(LOG_ERROR, "Couldn't find playback %s\n",
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playback_id);
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return;
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}
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play_on_channel(playback, bridge_channel->chan);
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}
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/*!
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* \brief \ref RAII_VAR function to remove a playback from the global list when
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* leaving scope.
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*/
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static void remove_from_playbacks(struct stasis_app_playback *playback)
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{
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ao2_unlink_flags(playbacks, playback,
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OBJ_POINTER | OBJ_UNLINK | OBJ_NODATA);
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}
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static int play_uri(struct stasis_app_control *control,
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struct ast_channel *chan, void *data)
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{
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RAII_VAR(struct stasis_app_playback *, playback, NULL,
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remove_from_playbacks);
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struct ast_bridge *bridge;
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playback = data;
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if (!control) {
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return -1;
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}
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bridge = stasis_app_get_bridge(control);
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if (bridge) {
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struct ast_bridge_channel *bridge_chan;
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/* Queue up playback on the bridge */
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ast_bridge_lock(bridge);
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bridge_chan = ao2_bump(bridge_find_channel(bridge, chan));
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ast_bridge_unlock(bridge);
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if (bridge_chan) {
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ast_bridge_channel_queue_playfile_sync(
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bridge_chan,
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play_on_channel_in_bridge,
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playback->id,
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NULL); /* moh_class */
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}
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ao2_cleanup(bridge_chan);
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} else {
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play_on_channel(playback, chan);
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}
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return 0;
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}
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static void set_target_uri(
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struct stasis_app_playback *playback,
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enum stasis_app_playback_target_type target_type,
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const char *target_id)
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{
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const char *type = NULL;
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switch (target_type) {
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case STASIS_PLAYBACK_TARGET_CHANNEL:
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type = "channel";
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break;
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case STASIS_PLAYBACK_TARGET_BRIDGE:
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type = "bridge";
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break;
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}
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ast_assert(type != NULL);
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ast_string_field_build(playback, target, "%s:%s", type, target_id);
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}
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struct stasis_app_playback *stasis_app_control_play_uri(
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struct stasis_app_control *control, const char *uri,
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const char *language, const char *target_id,
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enum stasis_app_playback_target_type target_type,
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int skipms, long offsetms, const char *id)
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{
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RAII_VAR(struct stasis_app_playback *, playback, NULL, ao2_cleanup);
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if (skipms < 0 || offsetms < 0) {
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return NULL;
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}
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ast_debug(3, "%s: Sending play(%s) command\n",
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stasis_app_control_get_channel_id(control), uri);
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playback = playback_create(control, id);
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if (skipms == 0) {
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skipms = PLAYBACK_DEFAULT_SKIPMS;
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}
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ast_string_field_set(playback, media, uri);
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ast_string_field_set(playback, language, language);
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set_target_uri(playback, target_type, target_id);
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playback->skipms = skipms;
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playback->offsetms = offsetms;
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ao2_link(playbacks, playback);
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playback->state = STASIS_PLAYBACK_STATE_QUEUED;
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playback_publish(playback);
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/* A ref is kept in the playbacks container; no need to bump */
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stasis_app_send_command_async(control, play_uri, playback);
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/* Although this should be bumped for the caller */
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ao2_ref(playback, +1);
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return playback;
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}
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enum stasis_app_playback_state stasis_app_playback_get_state(
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struct stasis_app_playback *control)
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{
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SCOPED_AO2LOCK(lock, control);
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return control->state;
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}
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const char *stasis_app_playback_get_id(
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struct stasis_app_playback *control)
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{
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/* id is immutable; no lock needed */
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return control->id;
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}
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struct stasis_app_playback *stasis_app_playback_find_by_id(const char *id)
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{
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return ao2_find(playbacks, id, OBJ_KEY);
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}
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struct ast_json *stasis_app_playback_to_json(
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const struct stasis_app_playback *playback)
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{
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RAII_VAR(struct ast_json *, json, NULL, ast_json_unref);
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if (playback == NULL) {
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return NULL;
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}
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json = ast_json_pack("{s: s, s: s, s: s, s: s, s: s}",
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"id", playback->id,
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"media_uri", playback->media,
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"target_uri", playback->target,
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"language", playback->language,
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"state", state_to_string(playback->state));
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return ast_json_ref(json);
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}
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typedef int (*playback_opreation_cb)(struct stasis_app_playback *playback);
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static int playback_noop(struct stasis_app_playback *playback)
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{
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return 0;
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}
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static int playback_cancel(struct stasis_app_playback *playback)
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{
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SCOPED_AO2LOCK(lock, playback);
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playback->state = STASIS_PLAYBACK_STATE_CANCELED;
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return 0;
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}
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static int playback_stop(struct stasis_app_playback *playback)
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{
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SCOPED_AO2LOCK(lock, playback);
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if (!playback->controllable) {
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return -1;
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}
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playback->state = STASIS_PLAYBACK_STATE_STOPPED;
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return stasis_app_control_queue_control(playback->control,
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AST_CONTROL_STREAM_STOP);
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}
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static int playback_restart(struct stasis_app_playback *playback)
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{
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SCOPED_AO2LOCK(lock, playback);
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if (!playback->controllable) {
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return -1;
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}
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return stasis_app_control_queue_control(playback->control,
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AST_CONTROL_STREAM_RESTART);
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}
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static int playback_pause(struct stasis_app_playback *playback)
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{
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SCOPED_AO2LOCK(lock, playback);
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if (!playback->controllable) {
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return -1;
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}
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playback->state = STASIS_PLAYBACK_STATE_PAUSED;
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playback_publish(playback);
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return stasis_app_control_queue_control(playback->control,
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AST_CONTROL_STREAM_SUSPEND);
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}
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static int playback_unpause(struct stasis_app_playback *playback)
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{
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SCOPED_AO2LOCK(lock, playback);
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if (!playback->controllable) {
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return -1;
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}
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playback->state = STASIS_PLAYBACK_STATE_PLAYING;
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playback_publish(playback);
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return stasis_app_control_queue_control(playback->control,
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AST_CONTROL_STREAM_SUSPEND);
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}
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static int playback_reverse(struct stasis_app_playback *playback)
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{
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SCOPED_AO2LOCK(lock, playback);
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if (!playback->controllable) {
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return -1;
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}
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return stasis_app_control_queue_control(playback->control,
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AST_CONTROL_STREAM_REVERSE);
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}
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static int playback_forward(struct stasis_app_playback *playback)
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{
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SCOPED_AO2LOCK(lock, playback);
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if (!playback->controllable) {
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return -1;
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}
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return stasis_app_control_queue_control(playback->control,
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AST_CONTROL_STREAM_FORWARD);
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}
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/*!
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* \brief A sparse array detailing how commands should be handled in the
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* various playback states. Unset entries imply invalid operations.
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*/
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playback_opreation_cb operations[STASIS_PLAYBACK_STATE_MAX][STASIS_PLAYBACK_MEDIA_OP_MAX] = {
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[STASIS_PLAYBACK_STATE_QUEUED][STASIS_PLAYBACK_STOP] = playback_cancel,
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[STASIS_PLAYBACK_STATE_QUEUED][STASIS_PLAYBACK_RESTART] = playback_noop,
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[STASIS_PLAYBACK_STATE_PLAYING][STASIS_PLAYBACK_STOP] = playback_stop,
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[STASIS_PLAYBACK_STATE_PLAYING][STASIS_PLAYBACK_RESTART] = playback_restart,
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[STASIS_PLAYBACK_STATE_PLAYING][STASIS_PLAYBACK_PAUSE] = playback_pause,
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[STASIS_PLAYBACK_STATE_PLAYING][STASIS_PLAYBACK_UNPAUSE] = playback_noop,
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[STASIS_PLAYBACK_STATE_PLAYING][STASIS_PLAYBACK_REVERSE] = playback_reverse,
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[STASIS_PLAYBACK_STATE_PLAYING][STASIS_PLAYBACK_FORWARD] = playback_forward,
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[STASIS_PLAYBACK_STATE_PAUSED][STASIS_PLAYBACK_STOP] = playback_stop,
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[STASIS_PLAYBACK_STATE_PAUSED][STASIS_PLAYBACK_PAUSE] = playback_noop,
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[STASIS_PLAYBACK_STATE_PAUSED][STASIS_PLAYBACK_UNPAUSE] = playback_unpause,
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[STASIS_PLAYBACK_STATE_COMPLETE][STASIS_PLAYBACK_STOP] = playback_noop,
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[STASIS_PLAYBACK_STATE_CANCELED][STASIS_PLAYBACK_STOP] = playback_noop,
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[STASIS_PLAYBACK_STATE_STOPPED][STASIS_PLAYBACK_STOP] = playback_noop,
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};
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enum stasis_playback_oper_results stasis_app_playback_operation(
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struct stasis_app_playback *playback,
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enum stasis_app_playback_media_operation operation)
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{
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playback_opreation_cb cb;
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SCOPED_AO2LOCK(lock, playback);
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ast_assert(playback->state >= 0 && playback->state < STASIS_PLAYBACK_STATE_MAX);
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if (operation < 0 || operation >= STASIS_PLAYBACK_MEDIA_OP_MAX) {
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ast_log(LOG_ERROR, "Invalid playback operation %u\n", operation);
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return -1;
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}
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cb = operations[playback->state][operation];
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if (!cb) {
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if (playback->state != STASIS_PLAYBACK_STATE_PLAYING) {
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/* So we can be specific in our error message. */
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return STASIS_PLAYBACK_OPER_NOT_PLAYING;
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} else {
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/* And, really, all operations should be valid during
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* playback */
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ast_log(LOG_ERROR,
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"Unhandled operation during playback: %u\n",
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operation);
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return STASIS_PLAYBACK_OPER_FAILED;
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}
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}
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return cb(playback) ?
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STASIS_PLAYBACK_OPER_FAILED : STASIS_PLAYBACK_OPER_OK;
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}
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static int load_module(void)
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{
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int r;
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r = STASIS_MESSAGE_TYPE_INIT(stasis_app_playback_snapshot_type);
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if (r != 0) {
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return AST_MODULE_LOAD_FAILURE;
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}
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playbacks = ao2_container_alloc(PLAYBACK_BUCKETS, playback_hash,
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playback_cmp);
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if (!playbacks) {
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return AST_MODULE_LOAD_FAILURE;
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}
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return AST_MODULE_LOAD_SUCCESS;
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}
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static int unload_module(void)
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{
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ao2_cleanup(playbacks);
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playbacks = NULL;
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STASIS_MESSAGE_TYPE_CLEANUP(stasis_app_playback_snapshot_type);
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return 0;
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}
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AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_GLOBAL_SYMBOLS, "Stasis application playback support",
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.support_level = AST_MODULE_SUPPORT_CORE,
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.load = load_module,
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.unload = unload_module,
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.nonoptreq = "res_stasis,res_stasis_recording");
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