diff options
Diffstat (limited to 'input/ipc.c')
| -rw-r--r-- | input/ipc.c | 414 |
1 files changed, 414 insertions, 0 deletions
diff --git a/input/ipc.c b/input/ipc.c new file mode 100644 index 0000000..ea69fb7 --- /dev/null +++ b/input/ipc.c @@ -0,0 +1,414 @@ +/* + * This file is part of mpv. + * + * mpv is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * mpv 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with mpv. If not, see <http://www.gnu.org/licenses/>. + */ + +#include "common/msg.h" +#include "input/input.h" +#include "misc/json.h" +#include "misc/node.h" +#include "options/m_option.h" +#include "options/options.h" +#include "options/path.h" +#include "player/client.h" + +static mpv_node *mpv_node_array_get(mpv_node *src, int index) +{ + if (src->format != MPV_FORMAT_NODE_ARRAY) + return NULL; + + if (src->u.list->num < (index + 1)) + return NULL; + + return &src->u.list->values[index]; +} + +static void mpv_node_map_add(void *ta_parent, mpv_node *src, const char *key, mpv_node *val) +{ + if (src->format != MPV_FORMAT_NODE_MAP) + return; + + if (!src->u.list) + src->u.list = talloc_zero(ta_parent, mpv_node_list); + + MP_TARRAY_GROW(src->u.list, src->u.list->keys, src->u.list->num); + MP_TARRAY_GROW(src->u.list, src->u.list->values, src->u.list->num); + + src->u.list->keys[src->u.list->num] = talloc_strdup(ta_parent, key); + + static const struct m_option type = { .type = CONF_TYPE_NODE }; + m_option_get_node(&type, ta_parent, &src->u.list->values[src->u.list->num], val); + + src->u.list->num++; +} + +static void mpv_node_map_add_null(void *ta_parent, mpv_node *src, const char *key) +{ + mpv_node val_node = {.format = MPV_FORMAT_NONE}; + mpv_node_map_add(ta_parent, src, key, &val_node); +} + +static void mpv_node_map_add_int64(void *ta_parent, mpv_node *src, const char *key, int64_t val) +{ + mpv_node val_node = {.format = MPV_FORMAT_INT64, .u.int64 = val}; + mpv_node_map_add(ta_parent, src, key, &val_node); +} + +static void mpv_node_map_add_string(void *ta_parent, mpv_node *src, const char *key, const char *val) +{ + mpv_node val_node = {.format = MPV_FORMAT_STRING, .u.string = (char*)val}; + mpv_node_map_add(ta_parent, src, key, &val_node); +} + +// This is supposed to write a reply that looks like "normal" command execution. +static void mpv_format_command_reply(void *ta_parent, mpv_event *event, + mpv_node *dst) +{ + assert(event->event_id == MPV_EVENT_COMMAND_REPLY); + mpv_event_command *cmd = event->data; + + mpv_node_map_add_int64(ta_parent, dst, "request_id", event->reply_userdata); + + mpv_node_map_add_string(ta_parent, dst, "error", + mpv_error_string(event->error)); + + mpv_node_map_add(ta_parent, dst, "data", &cmd->result); +} + +char *mp_json_encode_event(mpv_event *event) +{ + void *ta_parent = talloc_new(NULL); + + struct mpv_node event_node; + if (event->event_id == MPV_EVENT_COMMAND_REPLY) { + event_node = (mpv_node){.format = MPV_FORMAT_NODE_MAP, .u.list = NULL}; + mpv_format_command_reply(ta_parent, event, &event_node); + } else { + mpv_event_to_node(&event_node, event); + // Abuse mpv_event_to_node() internals. + talloc_steal(ta_parent, node_get_alloc(&event_node)); + } + + char *output = talloc_strdup(NULL, ""); + json_write(&output, &event_node); + output = ta_talloc_strdup_append(output, "\n"); + + talloc_free(ta_parent); + + return output; +} + +// Function is allowed to modify src[n]. +static char *json_execute_command(struct mpv_handle *client, void *ta_parent, + char *src) +{ + int rc; + const char *cmd = NULL; + struct mp_log *log = mp_client_get_log(client); + + mpv_node msg_node; + mpv_node reply_node = {.format = MPV_FORMAT_NODE_MAP, .u.list = NULL}; + mpv_node *reqid_node = NULL; + int64_t reqid = 0; + mpv_node *async_node = NULL; + bool async = false; + bool send_reply = true; + + rc = json_parse(ta_parent, &msg_node, &src, MAX_JSON_DEPTH); + if (rc < 0) { + mp_err(log, "malformed JSON received: '%s'\n", src); + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + if (msg_node.format != MPV_FORMAT_NODE_MAP) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + async_node = node_map_get(&msg_node, "async"); + if (async_node) { + if (async_node->format != MPV_FORMAT_FLAG) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + async = async_node->u.flag; + } + + reqid_node = node_map_get(&msg_node, "request_id"); + if (reqid_node) { + if (reqid_node->format == MPV_FORMAT_INT64) { + reqid = reqid_node->u.int64; + } else if (async) { + mp_err(log, "'request_id' must be an integer for async commands.\n"); + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } else { + mp_warn(log, "'request_id' must be an integer. Using other types is " + "deprecated and will trigger an error in the future!\n"); + } + } + + mpv_node *cmd_node = node_map_get(&msg_node, "command"); + if (!cmd_node) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + if (cmd_node->format == MPV_FORMAT_NODE_ARRAY) { + mpv_node *cmd_str_node = mpv_node_array_get(cmd_node, 0); + if (!cmd_str_node || (cmd_str_node->format != MPV_FORMAT_STRING)) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + cmd = cmd_str_node->u.string; + } + + if (cmd && !strcmp("client_name", cmd)) { + const char *client_name = mpv_client_name(client); + mpv_node_map_add_string(ta_parent, &reply_node, "data", client_name); + rc = MPV_ERROR_SUCCESS; + } else if (cmd && !strcmp("get_time_us", cmd)) { + int64_t time_us = mpv_get_time_us(client); + mpv_node_map_add_int64(ta_parent, &reply_node, "data", time_us); + rc = MPV_ERROR_SUCCESS; + } else if (cmd && !strcmp("get_version", cmd)) { + int64_t ver = mpv_client_api_version(); + mpv_node_map_add_int64(ta_parent, &reply_node, "data", ver); + rc = MPV_ERROR_SUCCESS; + } else if (cmd && !strcmp("get_property", cmd)) { + mpv_node result_node; + + if (cmd_node->u.list->num != 2) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + if (cmd_node->u.list->values[1].format != MPV_FORMAT_STRING) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + rc = mpv_get_property(client, cmd_node->u.list->values[1].u.string, + MPV_FORMAT_NODE, &result_node); + if (rc >= 0) { + mpv_node_map_add(ta_parent, &reply_node, "data", &result_node); + mpv_free_node_contents(&result_node); + } + } else if (cmd && !strcmp("get_property_string", cmd)) { + if (cmd_node->u.list->num != 2) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + if (cmd_node->u.list->values[1].format != MPV_FORMAT_STRING) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + char *result = mpv_get_property_string(client, + cmd_node->u.list->values[1].u.string); + if (result) { + mpv_node_map_add_string(ta_parent, &reply_node, "data", result); + mpv_free(result); + } else { + mpv_node_map_add_null(ta_parent, &reply_node, "data"); + } + } else if (cmd && (!strcmp("set_property", cmd) || + !strcmp("set_property_string", cmd))) + { + if (cmd_node->u.list->num != 3) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + if (cmd_node->u.list->values[1].format != MPV_FORMAT_STRING) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + rc = mpv_set_property(client, cmd_node->u.list->values[1].u.string, + MPV_FORMAT_NODE, &cmd_node->u.list->values[2]); + } else if (cmd && !strcmp("observe_property", cmd)) { + if (cmd_node->u.list->num != 3) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + if (cmd_node->u.list->values[1].format != MPV_FORMAT_INT64) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + if (cmd_node->u.list->values[2].format != MPV_FORMAT_STRING) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + rc = mpv_observe_property(client, + cmd_node->u.list->values[1].u.int64, + cmd_node->u.list->values[2].u.string, + MPV_FORMAT_NODE); + } else if (cmd && !strcmp("observe_property_string", cmd)) { + if (cmd_node->u.list->num != 3) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + if (cmd_node->u.list->values[1].format != MPV_FORMAT_INT64) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + if (cmd_node->u.list->values[2].format != MPV_FORMAT_STRING) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + rc = mpv_observe_property(client, + cmd_node->u.list->values[1].u.int64, + cmd_node->u.list->values[2].u.string, + MPV_FORMAT_STRING); + } else if (cmd && !strcmp("unobserve_property", cmd)) { + if (cmd_node->u.list->num != 2) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + if (cmd_node->u.list->values[1].format != MPV_FORMAT_INT64) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + rc = mpv_unobserve_property(client, + cmd_node->u.list->values[1].u.int64); + } else if (cmd && !strcmp("request_log_messages", cmd)) { + if (cmd_node->u.list->num != 2) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + if (cmd_node->u.list->values[1].format != MPV_FORMAT_STRING) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + rc = mpv_request_log_messages(client, + cmd_node->u.list->values[1].u.string); + } else if (cmd && (!strcmp("enable_event", cmd) || + !strcmp("disable_event", cmd))) + { + bool enable = !strcmp("enable_event", cmd); + + if (cmd_node->u.list->num != 2) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + if (cmd_node->u.list->values[1].format != MPV_FORMAT_STRING) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + + char *name = cmd_node->u.list->values[1].u.string; + if (strcmp(name, "all") == 0) { + for (int n = 0; n < 64; n++) + mpv_request_event(client, n, enable); + rc = MPV_ERROR_SUCCESS; + } else { + int event = -1; + for (int n = 0; n < 64; n++) { + const char *evname = mpv_event_name(n); + if (evname && strcmp(evname, name) == 0) + event = n; + } + if (event < 0) { + rc = MPV_ERROR_INVALID_PARAMETER; + goto error; + } + rc = mpv_request_event(client, event, enable); + } + } else { + mpv_node result_node = {0}; + + if (async) { + rc = mpv_command_node_async(client, reqid, cmd_node); + if (rc >= 0) + send_reply = false; + } else { + rc = mpv_command_node(client, cmd_node, &result_node); + if (rc >= 0) + mpv_node_map_add(ta_parent, &reply_node, "data", &result_node); + } + + mpv_free_node_contents(&result_node); + } + +error: + /* If the request contains a "request_id", copy it back into the response. + * This makes it easier on the requester to match up the IPC results with + * the original requests. + */ + if (reqid_node) { + mpv_node_map_add(ta_parent, &reply_node, "request_id", reqid_node); + } else { + mpv_node_map_add_int64(ta_parent, &reply_node, "request_id", 0); + } + + mpv_node_map_add_string(ta_parent, &reply_node, "error", mpv_error_string(rc)); + + char *output = talloc_strdup(ta_parent, ""); + + if (send_reply) { + json_write(&output, &reply_node); + output = ta_talloc_strdup_append(output, "\n"); + } + + return output; +} + +static char *text_execute_command(struct mpv_handle *client, void *tmp, char *src) +{ + mpv_command_string(client, src); + + return NULL; +} + +char *mp_ipc_consume_next_command(struct mpv_handle *client, void *ctx, bstr *buf) +{ + void *tmp = talloc_new(NULL); + + bstr rest; + bstr line = bstr_getline(*buf, &rest); + char *line0 = bstrto0(tmp, line); + talloc_steal(tmp, buf->start); + *buf = bstrdup(NULL, rest); + + json_skip_whitespace(&line0); + + char *reply_msg = NULL; + if (line0[0] == '\0' || line0[0] == '#') { + // skip + } else if (line0[0] == '{') { + reply_msg = json_execute_command(client, tmp, line0); + } else { + reply_msg = text_execute_command(client, tmp, line0); + } + + talloc_steal(ctx, reply_msg); + talloc_free(tmp); + return reply_msg; +} |