[Freeswitch-svn] [commit] r13851 - freeswitch/trunk/src/mod/formats/mod_shell_stream
FreeSWITCH SVN
anthm at freeswitch.org
Thu Jun 18 15:36:51 PDT 2009
Author: anthm
Date: Thu Jun 18 17:36:51 2009
New Revision: 13851
Log:
add mod_shell_stream
Added:
freeswitch/trunk/src/mod/formats/mod_shell_stream/
freeswitch/trunk/src/mod/formats/mod_shell_stream/mod_shell_stream.c
Added: freeswitch/trunk/src/mod/formats/mod_shell_stream/mod_shell_stream.c
==============================================================================
--- (empty file)
+++ freeswitch/trunk/src/mod/formats/mod_shell_stream/mod_shell_stream.c Thu Jun 18 17:36:51 2009
@@ -0,0 +1,224 @@
+/*
+ * FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
+ * Copyright (C) 2005-2009, Anthony Minessale II <anthm at freeswitch.org>
+ *
+ * Version: MPL 1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
+ *
+ * The Initial Developer of the Original Code is
+ * Anthony Minessale II <anthm at freeswitch.org>
+ * Portions created by the Initial Developer are Copyright (C)
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Anthony Minessale II <anthm at freeswitch.org>
+ *
+ * mod_shell_stream.c -- Local Streaming Audio
+ *
+ */
+#include <switch.h>
+
+#define MY_BUF_LEN 1024 * 32
+#define MY_BLOCK_SIZE MY_BUF_LEN
+
+
+SWITCH_MODULE_LOAD_FUNCTION(mod_shell_stream_load);
+
+SWITCH_MODULE_DEFINITION(mod_shell_stream, mod_shell_stream_load, NULL, NULL);
+
+struct shell_stream_context {
+ int fds[2];
+ int pid;
+ char *command;
+ switch_buffer_t *audio_buffer;
+ switch_mutex_t *mutex;
+ switch_thread_rwlock_t *rwlock;
+ int running;
+};
+
+typedef struct shell_stream_context shell_stream_context_t;
+
+
+static void *SWITCH_THREAD_FUNC buffer_thread_run(switch_thread_t *thread, void *obj)
+{
+ shell_stream_context_t *context = (shell_stream_context_t *) obj;
+ switch_byte_t data[MY_BUF_LEN];
+ ssize_t rlen;
+
+ context->running = 1;
+
+ if (switch_thread_rwlock_tryrdlock(context->rwlock) != SWITCH_STATUS_SUCCESS) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Read Lock Fail\n");
+ goto end;
+ }
+
+ while(context->running) {
+
+ rlen = read(context->fds[0], data, MY_BUF_LEN);
+
+ if (rlen <= 3) {
+ break;
+ }
+
+ switch_mutex_lock(context->mutex);
+ switch_buffer_write(context->audio_buffer, data, rlen);
+ switch_mutex_unlock(context->mutex);
+ }
+
+ switch_thread_rwlock_unlock(context->rwlock);
+
+ end:
+
+ context->running = 0;
+
+ return NULL;
+}
+
+static switch_status_t shell_stream_file_open(switch_file_handle_t *handle, const char *path)
+{
+ shell_stream_context_t *context;
+ switch_status_t status = SWITCH_STATUS_SUCCESS;
+ switch_thread_t *thread;
+ switch_threadattr_t *thd_attr = NULL;
+
+ if (switch_test_flag(handle, SWITCH_FILE_FLAG_WRITE)) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "This format does not support writing!\n");
+ return SWITCH_STATUS_FALSE;
+ }
+
+ context = switch_core_alloc(handle->memory_pool, sizeof(*context));
+
+ context->fds[0] = -1;
+ context->fds[1] = -1;
+ context->command = switch_core_strdup(handle->memory_pool, path);
+
+ if (pipe(context->fds)) {
+ goto error;
+ } else { /* good to go*/
+ context->pid = fork();
+
+ if (context->pid < 0) { /* ok maybe not */
+ goto error;
+ } else if (context->pid) { /* parent */
+ handle->private_info = context;
+ status = SWITCH_STATUS_SUCCESS;
+ close(context->fds[1]);
+ context->fds[1] = -1;
+
+ if (switch_buffer_create_dynamic(&context->audio_buffer, MY_BLOCK_SIZE, MY_BUF_LEN, 0) != SWITCH_STATUS_SUCCESS) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Write Buffer Failed!\n");
+ goto error;
+ }
+
+ switch_thread_rwlock_create(&context->rwlock, handle->memory_pool);
+ switch_mutex_init(&context->mutex, SWITCH_MUTEX_NESTED, handle->memory_pool);
+
+ switch_threadattr_create(&thd_attr, handle->memory_pool);
+ switch_threadattr_detach_set(thd_attr, 1);
+ switch_threadattr_stacksize_set(thd_attr, SWITCH_THREAD_STACKSIZE);
+ switch_thread_create(&thread, thd_attr, buffer_thread_run, context, handle->memory_pool);
+ context->running = 2;
+
+ while(context->running == 2) {
+ switch_cond_next();
+ }
+
+ goto end;
+ } else { /* child */
+ close(context->fds[0]);
+ dup2(context->fds[1], STDOUT_FILENO);
+ switch_system(context->command, SWITCH_TRUE);
+ printf("EOF");
+ close(context->fds[1]);
+ exit(0);
+ }
+ }
+
+ error:
+
+ close(context->fds[0]);
+ close(context->fds[1]);
+ status = SWITCH_STATUS_FALSE;
+
+
+ end:
+
+ return status;
+}
+
+static switch_status_t shell_stream_file_close(switch_file_handle_t *handle)
+{
+ shell_stream_context_t *context = handle->private_info;
+
+ context->running = 0;
+
+ if (context->fds[0] > -1) {
+ close(context->fds[0]);
+ }
+
+ switch_thread_rwlock_wrlock(context->rwlock);
+ switch_thread_rwlock_unlock(context->rwlock);
+
+ return SWITCH_STATUS_SUCCESS;
+}
+
+static switch_status_t shell_stream_file_read(switch_file_handle_t *handle, void *data, size_t *len)
+{
+ shell_stream_context_t *context = handle->private_info;
+ switch_status_t status = SWITCH_STATUS_SUCCESS;
+ switch_size_t rlen = *len * 2;
+
+ while(context->running && switch_buffer_inuse(context->audio_buffer) < rlen) {
+ switch_cond_next();
+ }
+
+ switch_mutex_lock(context->mutex);
+ *len = switch_buffer_read(context->audio_buffer, data, rlen) / 2;
+ switch_mutex_unlock(context->mutex);
+
+ return status;
+}
+
+/* Registration */
+
+static char *supported_formats[SWITCH_MAX_CODECS] = { 0 };
+
+SWITCH_MODULE_LOAD_FUNCTION(mod_shell_stream_load)
+{
+ switch_file_interface_t *file_interface;
+ supported_formats[0] = "shell_stream";
+
+ *module_interface = switch_loadable_module_create_module_interface(pool, modname);
+ file_interface = switch_loadable_module_create_interface(*module_interface, SWITCH_FILE_INTERFACE);
+ file_interface->interface_name = modname;
+ file_interface->extens = supported_formats;
+ file_interface->file_open = shell_stream_file_open;
+ file_interface->file_close = shell_stream_file_close;
+ file_interface->file_read = shell_stream_file_read;
+
+ /* indicate that the module should continue to be loaded */
+ return SWITCH_STATUS_SUCCESS;
+}
+
+/* For Emacs:
+ * Local Variables:
+ * mode:c
+ * indent-tabs-mode:t
+ * tab-width:4
+ * c-basic-offset:4
+ * End:
+ * For VIM:
+ * vim:set softtabstop=4 shiftwidth=4 tabstop=4:
+ */
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