FS-7512: add mod_png to play a png as video defaults to 10 sec add {png_ms=N} to change (negative number is forever)

build/modules.conf.in

@@ -120,6 +120,7 @@ formats/mod_sndfile
 #formats/mod_ssml
 formats/mod_tone_stream
 #formats/mod_vlc
+formats/mod_png
 #languages/mod_basic
 #languages/mod_java
 languages/mod_lua

conf/vanilla/autoload_configs/modules.conf.xml

@@ -98,6 +98,7 @@
     <!-- File Format Interfaces -->
     <load module="mod_sndfile"/>
     <load module="mod_native_file"/>
+    <load module="mod_png"/>
     <!-- <load module="mod_shell_stream"/> -->
     <!--For icecast/mp3 streams/files-->
     <!--<load module="mod_shout"/>-->

src/mod/formats/mod_png/mod_png.c

@@ -0,0 +1,205 @@
+/* 
+ * FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
+ * Copyright (C) 2005-2015, Anthony Minessale II <anthm@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
+ * Seven Du <dujinfang@gmail.com>
+ * Portions created by the Initial Developer are Copyright (C)
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * mod_png -- play a png as video
+ *
+ */
+
+#include <switch.h>
+
+#ifdef _MSC_VER
+// Disable MSVC warnings that suggest making code non-portable.
+#pragma warning(disable : 4996)
+#endif
+
+SWITCH_MODULE_LOAD_FUNCTION(mod_png_load);
+SWITCH_MODULE_DEFINITION(mod_png, mod_png_load, NULL, NULL);
+
+struct png_file_context {
+	switch_memory_pool_t *pool;
+	switch_image_t *img;
+	int reads;
+	int sent;
+	int max;
+	int samples;
+};
+
+typedef struct png_file_context png_file_context_t;
+
+static switch_status_t png_file_open(switch_file_handle_t *handle, const char *path)
+{
+	png_file_context_t *context;
+	char *ext;
+	unsigned int flags = 0;
+
+	if ((ext = strrchr((char *)path, '.')) == 0) {
+		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Invalid Format\n");
+		return SWITCH_STATUS_GENERR;
+	}
+	ext++;
+	
+	if ((context = (png_file_context_t *)switch_core_alloc(handle->memory_pool, sizeof(png_file_context_t))) == 0) {
+		return SWITCH_STATUS_MEMERR;
+	}
+
+	if (!switch_test_flag(handle, SWITCH_FILE_FLAG_VIDEO)) {
+		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Video only\n");
+		return SWITCH_STATUS_GENERR; 
+	}
+
+	memset(context, 0, sizeof(png_file_context_t));
+
+	if (!(context->img = switch_img_read_png(path))) {
+		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "Error Opening %s\n", path);
+		return SWITCH_STATUS_GENERR;
+	}
+
+	if (switch_test_flag(handle, SWITCH_FILE_FLAG_WRITE)) {
+		return SWITCH_STATUS_GENERR;
+	}
+
+	if (switch_test_flag(handle, SWITCH_FILE_FLAG_READ)) {
+		flags |= SWITCH_FOPEN_READ;
+	}
+
+	context->max = 10000;
+
+	if (handle->params) {
+		const char *max = switch_event_get_header(handle->params, "png_ms");
+		int tmp;
+
+		if (max) {
+			tmp = atol(max);
+			context->max = tmp;
+		}
+	}
+
+	if (context->max) {
+		context->samples = (handle->samplerate / 1000) * context->max;
+	}
+	
+	handle->format = 0;
+	handle->sections = 0;
+	handle->seekable = 0;
+	handle->speed = 0;
+	handle->pos = 0;
+	handle->private_info = context;
+	context->pool = handle->memory_pool;
+
+	switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "Opening File [%s]\n", path);
+
+	return SWITCH_STATUS_SUCCESS;
+
+}
+
+static switch_status_t png_file_close(switch_file_handle_t *handle)
+{
+	png_file_context_t *context = (png_file_context_t *)handle->private_info;
+
+	switch_img_free(&context->img);
+	
+	return SWITCH_STATUS_SUCCESS;
+}
+
+static switch_status_t png_file_read(switch_file_handle_t *handle, void *data, size_t *len)
+{
+
+	png_file_context_t *context = (png_file_context_t *)handle->private_info;
+
+	if (!context->img || !context->samples) {
+		return SWITCH_STATUS_FALSE;
+	}
+
+	if (context->samples > 0) {
+		if (*len >= context->samples) {
+			*len = context->samples;
+		}
+
+		context->samples -= *len;
+	}
+
+	if (!context->samples) {
+		return SWITCH_STATUS_FALSE;
+	}
+
+	memset(data, 0, *len * 2 * handle->channels);
+
+	return SWITCH_STATUS_SUCCESS;
+}
+
+static switch_status_t png_file_read_video(switch_file_handle_t *handle, switch_frame_t *frame, switch_video_read_flag_t flags)
+{
+	png_file_context_t *context = (png_file_context_t *)handle->private_info;
+	switch_image_t *dup = NULL;
+	
+	if (!context->img || !context->samples) {
+		return SWITCH_STATUS_FALSE;
+	}
+
+	if ((context->reads++ % 20) == 0) {
+		switch_img_copy(context->img, &dup);
+		frame->img = dup;
+		context->sent++;
+	} else {
+		return SWITCH_STATUS_BREAK;
+	}
+
+	return SWITCH_STATUS_SUCCESS;
+}
+
+
+static char *supported_formats[2] = { 0 };
+
+SWITCH_MODULE_LOAD_FUNCTION(mod_png_load)
+{
+	switch_file_interface_t *file_interface;
+
+	supported_formats[0] = (char *)"png";
+
+	/* connect my internal structure to the blank pointer passed to me */
+	*module_interface = switch_loadable_module_create_module_interface(pool, modname);
+
+	file_interface = (switch_file_interface_t *)switch_loadable_module_create_interface(*module_interface, SWITCH_FILE_INTERFACE);
+	file_interface->interface_name = modname;
+	file_interface->extens = supported_formats;
+	file_interface->file_open = png_file_open;
+	file_interface->file_close = png_file_close;
+	file_interface->file_read = png_file_read;
+	file_interface->file_read_video = png_file_read_video;
+
+	/* 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 noet:
+ */