test_stream.c

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/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 2017, Digium, Inc.
 *
 * Joshua Colp <[email protected]>
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

/*!
 * \file
 * \brief Media Stream API Unit Tests
 *
 * \author Joshua Colp <[email protected]>
 *
 */

/*** MODULEINFO
   <depend>TEST_FRAMEWORK</depend>
   <support_level>core</support_level>
 ***/

#include "asterisk.h"

#include "asterisk/test.h"
#include "asterisk/module.h"
#include "asterisk/stream.h"
#include "asterisk/format.h"
#include "asterisk/format_cap.h"
#include "asterisk/format_cache.h"
#include "asterisk/channel.h"
#include "asterisk/uuid.h"

AST_TEST_DEFINE(stream_create)
{
   RAII_VAR(struct ast_stream *, stream, NULL, ast_stream_free);

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_create";
      info->category = "/main/stream/";
      info->summary = "stream create unit test";
      info->description =
         "Test that creating a stream results in a stream with the expected values";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   stream = ast_stream_alloc("test", AST_MEDIA_TYPE_AUDIO);
   if (!stream) {
      ast_test_status_update(test, "Failed to create media stream given proper arguments\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_get_state(stream) != AST_STREAM_STATE_INACTIVE) {
      ast_test_status_update(test, "Newly created stream does not have expected inactive stream state\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_get_type(stream) != AST_MEDIA_TYPE_AUDIO) {
      ast_test_status_update(test, "Newly created stream does not have expected audio media type\n");
      return AST_TEST_FAIL;
   }

   if (strcmp(ast_stream_get_name(stream), "test")) {
      ast_test_status_update(test, "Newly created stream does not have expected name of test\n");
      return AST_TEST_FAIL;
   }

   return AST_TEST_PASS;
}

AST_TEST_DEFINE(stream_create_no_name)
{
   RAII_VAR(struct ast_stream *, stream, NULL, ast_stream_free);

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_create_no_name";
      info->category = "/main/stream/";
      info->summary = "stream create (without a name) unit test";
      info->description =
         "Test that creating a stream with no name works";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   stream = ast_stream_alloc(NULL, AST_MEDIA_TYPE_AUDIO);
   if (!stream) {
      ast_test_status_update(test, "Failed to create media stream given proper arguments\n");
      return AST_TEST_FAIL;
   }

   return AST_TEST_PASS;
}

AST_TEST_DEFINE(stream_set_type)
{
   RAII_VAR(struct ast_stream *, stream, NULL, ast_stream_free);

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_set_type";
      info->category = "/main/stream/";
      info->summary = "stream type setting unit test";
      info->description =
         "Test that changing the type of a stream works";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   stream = ast_stream_alloc("test", AST_MEDIA_TYPE_AUDIO);
   if (!stream) {
      ast_test_status_update(test, "Failed to create media stream given proper arguments\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_get_type(stream) != AST_MEDIA_TYPE_AUDIO) {
      ast_test_status_update(test, "Newly created stream does not have expected audio media type\n");
      return AST_TEST_FAIL;
   }

   ast_stream_set_type(stream, AST_MEDIA_TYPE_VIDEO);

   if (ast_stream_get_type(stream) != AST_MEDIA_TYPE_VIDEO) {
      ast_test_status_update(test, "Changed stream does not have expected video media type\n");
      return AST_TEST_FAIL;
   }

   return AST_TEST_PASS;
}

AST_TEST_DEFINE(stream_set_formats)
{
   RAII_VAR(struct ast_stream *, stream, NULL, ast_stream_free);
   RAII_VAR(struct ast_format_cap *, caps, NULL, ao2_cleanup);

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_set_formats";
      info->category = "/main/stream/";
      info->summary = "stream formats setting unit test";
      info->description =
         "Test that changing the formats of a stream works";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   caps = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
   if (!caps) {
      ast_test_status_update(test, "Failed to create a format capabilities structure for testing\n");
      return AST_TEST_FAIL;
   }

   stream = ast_stream_alloc("test", AST_MEDIA_TYPE_AUDIO);
   if (!stream) {
      ast_test_status_update(test, "Failed to create media stream given proper arguments\n");
      return AST_TEST_FAIL;
   }

   ast_stream_set_formats(stream, caps);

   if (ast_stream_get_formats(stream) != caps) {
      ast_test_status_update(test, "Changed stream does not have expected formats\n");
      return AST_TEST_FAIL;
   }

   ast_stream_set_formats(stream, NULL);

   if (ast_stream_get_formats(stream)) {
      ast_test_status_update(test, "Retrieved formats from stream despite removing them\n");
      return AST_TEST_FAIL;
   }

   return AST_TEST_PASS;
}

AST_TEST_DEFINE(stream_set_state)
{
   RAII_VAR(struct ast_stream *, stream, NULL, ast_stream_free);

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_set_state";
      info->category = "/main/stream/";
      info->summary = "stream state setting unit test";
      info->description =
         "Test that changing the state of a stream works";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   stream = ast_stream_alloc("test", AST_MEDIA_TYPE_AUDIO);
   if (!stream) {
      ast_test_status_update(test, "Failed to create media stream given proper arguments\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_get_state(stream) != AST_STREAM_STATE_INACTIVE) {
      ast_test_status_update(test, "Newly created stream does not have expected inactive stream state\n");
      return AST_TEST_FAIL;
   }

   ast_stream_set_state(stream, AST_STREAM_STATE_SENDRECV);

   if (ast_stream_get_state(stream) != AST_STREAM_STATE_SENDRECV) {
      ast_test_status_update(test, "Changed stream does not have expected sendrecv state\n");
      return AST_TEST_FAIL;
   }

   return AST_TEST_PASS;
}

AST_TEST_DEFINE(stream_metadata)
{
   RAII_VAR(struct ast_stream *, stream, NULL, ast_stream_free);
   char track_label[AST_UUID_STR_LEN + 1];
   const char *stream_track_label;
   int rc;

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_metadata";
      info->category = "/main/stream/";
      info->summary = "stream metadata unit test";
      info->description =
         "Test that metadata operations on a stream works";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   stream = ast_stream_alloc("test", AST_MEDIA_TYPE_AUDIO);
   if (!stream) {
      ast_test_status_update(test, "Failed to create media stream given proper arguments\n");
      return AST_TEST_FAIL;
   }

   stream_track_label = ast_stream_get_metadata(stream, "AST_STREAM_METADATA_TRACK_LABEL");
   if (stream_track_label) {
      ast_test_status_update(test, "New stream HAD a track label\n");
      return AST_TEST_FAIL;
   }

   ast_uuid_generate_str(track_label, sizeof(track_label));
   rc = ast_stream_set_metadata(stream, "AST_STREAM_METADATA_TRACK_LABEL", track_label);
   if (rc != 0) {
      ast_test_status_update(test, "Failed to add track label\n");
      return AST_TEST_FAIL;
   }

   stream_track_label = ast_stream_get_metadata(stream, "AST_STREAM_METADATA_TRACK_LABEL");
   if (!stream_track_label) {
      ast_test_status_update(test, "Changed stream does not have a track label\n");
      return AST_TEST_FAIL;
   }

   if (strcmp(stream_track_label, track_label) != 0) {
      ast_test_status_update(test, "Changed stream did not return same track label\n");
      return AST_TEST_FAIL;
   }

   rc = ast_stream_set_metadata(stream, "AST_STREAM_METADATA_TRACK_LABEL", NULL);
   if (rc != 0) {
      ast_test_status_update(test, "Failed to remove track label\n");
      return AST_TEST_FAIL;
   }

   stream_track_label = ast_stream_get_metadata(stream, "AST_STREAM_METADATA_TRACK_LABEL");
   if (stream_track_label) {
      ast_test_status_update(test, "Changed stream still had a track label after we removed it\n");
      return AST_TEST_FAIL;
   }

   return AST_TEST_PASS;
}

AST_TEST_DEFINE(stream_topology_create)
{
   RAII_VAR(struct ast_stream_topology *, topology, NULL, ast_stream_topology_free);

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_topology_create";
      info->category = "/main/stream/";
      info->summary = "stream topology creation unit test";
      info->description =
         "Test that creating a stream topology works";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   topology = ast_stream_topology_alloc();
   if (!topology) {
      ast_test_status_update(test, "Failed to create media stream topology\n");
      return AST_TEST_FAIL;
   }

   return AST_TEST_PASS;
}

AST_TEST_DEFINE(stream_topology_clone)
{
   RAII_VAR(struct ast_stream_topology *, topology, NULL, ast_stream_topology_free);
   RAII_VAR(struct ast_stream_topology *, cloned, NULL, ast_stream_topology_free);
   struct ast_stream *audio_stream, *video_stream;
   char audio_track_label[AST_UUID_STR_LEN + 1];
   char video_track_label[AST_UUID_STR_LEN + 1];
   const char *original_track_label;
   const char *cloned_track_label;
   int rc;

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_topology_clone";
      info->category = "/main/stream/";
      info->summary = "stream topology cloning unit test";
      info->description =
         "Test that cloning a stream topology results in a clone with the same contents";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   topology = ast_stream_topology_alloc();
   if (!topology) {
      ast_test_status_update(test, "Failed to create media stream topology\n");
      return AST_TEST_FAIL;
   }

   audio_stream = ast_stream_alloc("audio", AST_MEDIA_TYPE_AUDIO);
   if (!audio_stream) {
      ast_test_status_update(test, "Failed to create an audio stream for testing stream topology\n");
      return AST_TEST_FAIL;
   }

   ast_uuid_generate_str(audio_track_label, sizeof(audio_track_label));
   rc = ast_stream_set_metadata(audio_stream, "AST_STREAM_METADATA_TRACK_LABEL", audio_track_label);
   if (rc != 0) {
      ast_test_status_update(test, "Failed to add track label\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_append_stream(topology, audio_stream) == -1) {
      ast_test_status_update(test, "Failed to append valid audio stream to stream topology\n");
      ast_stream_free(audio_stream);
      return AST_TEST_FAIL;
   }

   video_stream = ast_stream_alloc("video", AST_MEDIA_TYPE_VIDEO);
   if (!video_stream) {
      ast_test_status_update(test, "Failed to create a video stream for testing stream topology\n");
      return AST_TEST_FAIL;
   }

   ast_uuid_generate_str(video_track_label, sizeof(video_track_label));
   rc = ast_stream_set_metadata(video_stream, "AST_STREAM_METADATA_TRACK_LABEL", video_track_label);
   if (rc != 0) {
      ast_test_status_update(test, "Failed to add track label\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_append_stream(topology, video_stream) == -1) {
      ast_test_status_update(test, "Failed to append valid video stream to stream topology\n");
      ast_stream_free(video_stream);
      return AST_TEST_FAIL;
   }

   cloned = ast_stream_topology_clone(topology);
   if (!cloned) {
      ast_test_status_update(test, "Failed to clone a perfectly good stream topology\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_get_count(cloned) != ast_stream_topology_get_count(topology)) {
      ast_test_status_update(test, "Cloned stream topology does not contain same number of streams as original\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_get_type(ast_stream_topology_get_stream(cloned, 0)) != ast_stream_get_type(ast_stream_topology_get_stream(topology, 0))) {
      ast_test_status_update(test, "Cloned audio stream does not contain same type as original\n");
      return AST_TEST_FAIL;
   }

   original_track_label = ast_stream_get_metadata(ast_stream_topology_get_stream(topology, 0),
      "AST_STREAM_METADATA_TRACK_LABEL");
   if (!original_track_label) {
      ast_test_status_update(test, "Original topology stream 0 does not contain metadata\n");
      return AST_TEST_FAIL;
   }
   cloned_track_label = ast_stream_get_metadata(ast_stream_topology_get_stream(cloned, 0),
      "AST_STREAM_METADATA_TRACK_LABEL");
   if (!cloned_track_label) {
      ast_test_status_update(test, "Cloned topology stream 0 does not contain metadata\n");
      return AST_TEST_FAIL;
   }
   if (strcmp(original_track_label, cloned_track_label) != 0) {
      ast_test_status_update(test, "Cloned topology stream 0 track label was not the same as the original\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_get_type(ast_stream_topology_get_stream(cloned, 1)) != ast_stream_get_type(ast_stream_topology_get_stream(topology, 1))) {
      ast_test_status_update(test, "Cloned video stream does not contain same type as original\n");
      return AST_TEST_FAIL;
   }

   original_track_label = ast_stream_get_metadata(ast_stream_topology_get_stream(topology, 1),
      "AST_STREAM_METADATA_TRACK_LABEL");
   if (!original_track_label) {
      ast_test_status_update(test, "Original topology stream 1 does not contain metadata\n");
      return AST_TEST_FAIL;
   }
   cloned_track_label = ast_stream_get_metadata(ast_stream_topology_get_stream(cloned, 1),
      "AST_STREAM_METADATA_TRACK_LABEL");
   if (!cloned_track_label) {
      ast_test_status_update(test, "Cloned topology stream 1 does not contain metadata\n");
      return AST_TEST_FAIL;
   }
   if (strcmp(original_track_label, cloned_track_label) != 0) {
      ast_test_status_update(test, "Cloned topology stream 1 track label was not the same as the original\n");
      return AST_TEST_FAIL;
   }

   return AST_TEST_PASS;
}

AST_TEST_DEFINE(stream_topology_append_stream)
{
   RAII_VAR(struct ast_stream_topology *, topology, NULL, ast_stream_topology_free);
   struct ast_stream *audio_stream, *video_stream;
   int position;

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_topology_append_stream";
      info->category = "/main/stream/";
      info->summary = "stream topology stream appending unit test";
      info->description =
         "Test that appending streams to a stream topology works";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   topology = ast_stream_topology_alloc();
   if (!topology) {
      ast_test_status_update(test, "Failed to create media stream topology\n");
      return AST_TEST_FAIL;
   }

   audio_stream = ast_stream_alloc("audio", AST_MEDIA_TYPE_AUDIO);
   if (!audio_stream) {
      ast_test_status_update(test, "Failed to create an audio stream for testing stream topology\n");
      return AST_TEST_FAIL;
   }

   position = ast_stream_topology_append_stream(topology, audio_stream);
   if (position == -1) {
      ast_test_status_update(test, "Failed to append valid audio stream to stream topology\n");
      ast_stream_free(audio_stream);
      return AST_TEST_FAIL;
   } else if (position != 0) {
      ast_test_status_update(test, "Appended audio stream to stream topology but position is '%d' instead of 0\n",
         position);
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_get_count(topology) != 1) {
      ast_test_status_update(test, "Appended an audio stream to the stream topology but stream count is '%d' on it, not 1\n",
         ast_stream_topology_get_count(topology));
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_get_stream(topology, 0) != audio_stream) {
      ast_test_status_update(test, "Appended an audio stream to the stream topology but returned stream doesn't match\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_get_position(audio_stream) != 0) {
      ast_test_status_update(test, "Appended audio stream says it is at position '%d' instead of 0\n",
         ast_stream_get_position(audio_stream));
      return AST_TEST_FAIL;
   }

   video_stream = ast_stream_alloc("video", AST_MEDIA_TYPE_VIDEO);
   if (!video_stream) {
      ast_test_status_update(test, "Failed to create a video stream for testing stream topology\n");
      return AST_TEST_FAIL;
   }

   position = ast_stream_topology_append_stream(topology, video_stream);
   if (position == -1) {
      ast_test_status_update(test, "Failed to append valid video stream to stream topology\n");
      ast_stream_free(video_stream);
      return AST_TEST_FAIL;
   } else if (position != 1) {
      ast_test_status_update(test, "Appended video stream to stream topology but position is '%d' instead of 1\n",
         position);
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_get_count(topology) != 2) {
      ast_test_status_update(test, "Appended a video stream to the stream topology but stream count is '%d' on it, not 2\n",
         ast_stream_topology_get_count(topology));
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_get_stream(topology, 1) != video_stream) {
      ast_test_status_update(test, "Appended a video stream to the stream topology but returned stream doesn't match\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_get_position(video_stream) != 1) {
      ast_test_status_update(test, "Appended video stream says it is at position '%d' instead of 1\n",
         ast_stream_get_position(video_stream));
      return AST_TEST_FAIL;
   }

   return AST_TEST_PASS;
}

AST_TEST_DEFINE(stream_topology_set_stream)
{
   RAII_VAR(struct ast_stream_topology *, topology, NULL, ast_stream_topology_free);
   struct ast_stream *audio_stream, *video_stream;

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_topology_set_stream";
      info->category = "/main/stream/";
      info->summary = "stream topology stream setting unit test";
      info->description =
         "Test that setting streams at a specific position in a topology works";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   topology = ast_stream_topology_alloc();
   if (!topology) {
      ast_test_status_update(test, "Failed to create media stream topology\n");
      return AST_TEST_FAIL;
   }

   audio_stream = ast_stream_alloc("audio", AST_MEDIA_TYPE_AUDIO);
   if (!audio_stream) {
      ast_test_status_update(test, "Failed to create an audio stream for testing stream topology\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_set_stream(topology, 0, audio_stream)) {
      ast_test_status_update(test, "Failed to set an audio stream to a position where it is permitted\n");
      ast_stream_free(audio_stream);
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_get_count(topology) != 1) {
      ast_test_status_update(test, "Set an audio stream on the stream topology but stream count is '%d' on it, not 1\n",
         ast_stream_topology_get_count(topology));
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_get_stream(topology, 0) != audio_stream) {
      ast_test_status_update(test, "Set an audio stream on the stream topology but returned stream doesn't match\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_get_position(audio_stream) != 0) {
      ast_test_status_update(test, "Set audio stream says it is at position '%d' instead of 0\n",
         ast_stream_get_position(audio_stream));
      return AST_TEST_FAIL;
   }

   video_stream = ast_stream_alloc("video", AST_MEDIA_TYPE_VIDEO);
   if (!video_stream) {
      ast_test_status_update(test, "Failed to create a video stream for testing stream topology\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_set_stream(topology, 0, video_stream)) {
      ast_test_status_update(test, "Failed to set a video stream to a position where it is permitted\n");
      ast_stream_free(video_stream);
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_get_count(topology) != 1) {
      ast_test_status_update(test, "Set a video stream on the stream topology but stream count is '%d' on it, not 1\n",
         ast_stream_topology_get_count(topology));
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_get_stream(topology, 0) != video_stream) {
      ast_test_status_update(test, "Set a video stream on the stream topology but returned stream doesn't match\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_get_position(video_stream) != 0) {
      ast_test_status_update(test, "Set video stream says it is at position '%d' instead of 0\n",
         ast_stream_get_position(video_stream));
      return AST_TEST_FAIL;
   }

   audio_stream = ast_stream_alloc("audio", AST_MEDIA_TYPE_AUDIO);
   if (!audio_stream) {
      ast_test_status_update(test, "Failed to create an audio stream for testing stream topology\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_set_stream(topology, 1, audio_stream)) {
      ast_test_status_update(test, "Failed to set an audio stream to a position where it is permitted\n");
      ast_stream_free(audio_stream);
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_get_count(topology) != 2) {
      ast_test_status_update(test, "Set an audio stream on the stream topology but stream count is '%d' on it, not 2\n",
         ast_stream_topology_get_count(topology));
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_get_stream(topology, 1) != audio_stream) {
      ast_test_status_update(test, "Set an audio stream on the stream topology but returned stream doesn't match\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_get_position(audio_stream) != 1) {
      ast_test_status_update(test, "Set audio stream says it is at position '%d' instead of 1\n",
         ast_stream_get_position(audio_stream));
      return AST_TEST_FAIL;
   }

   return AST_TEST_PASS;
}

static int check_stream_positions(struct ast_test *test, const struct ast_stream_topology *topology)
{
   const struct ast_stream *stream;
   int idx;
   int pos;
   enum ast_media_type type;

   for (idx = 0; idx < ast_stream_topology_get_count(topology); ++idx) {
      stream = ast_stream_topology_get_stream(topology, idx);
      pos = ast_stream_get_position(stream);
      if (idx != pos) {
         type = ast_stream_get_type(stream);
         ast_test_status_update(test, "Failed: '%s' stream says it is at position %d instead of %d\n",
            ast_codec_media_type2str(type), pos, idx);
         return -1;
      }
   }
   return 0;
}

AST_TEST_DEFINE(stream_topology_del_stream)
{
   RAII_VAR(struct ast_stream_topology *, topology, NULL, ast_stream_topology_free);
   struct ast_stream *stream;
   enum ast_media_type type;
   int idx;

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_topology_del_stream";
      info->category = "/main/stream/";
      info->summary = "stream topology stream delete unit test";
      info->description =
         "Test that deleting streams at a specific position in a topology works";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   topology = ast_stream_topology_alloc();
   if (!topology) {
      ast_test_status_update(test, "Failed to create media stream topology\n");
      return AST_TEST_FAIL;
   }

   /* Create streams */
   for (type = AST_MEDIA_TYPE_UNKNOWN; type < AST_MEDIA_TYPE_END; ++type) {
      stream = ast_stream_alloc(ast_codec_media_type2str(type), type);
      if (!stream) {
         ast_test_status_update(test, "Failed to create '%s' stream for testing stream topology\n",
            ast_codec_media_type2str(type));
         return AST_TEST_FAIL;
      }
      if (ast_stream_topology_append_stream(topology, stream) == -1) {
         ast_test_status_update(test, "Failed to append '%s' stream to topology\n",
            ast_codec_media_type2str(type));
         ast_stream_free(stream);
         return AST_TEST_FAIL;
      }
   }

   /* Check initial stream positions and types for sanity. */
   type = AST_MEDIA_TYPE_UNKNOWN;
   for (idx = 0; idx < ast_stream_topology_get_count(topology); ++idx, ++type) {
      stream = ast_stream_topology_get_stream(topology, idx);
      if (type != ast_stream_get_type(stream)) {
         ast_test_status_update(test, "Initial topology types failed: Expected:%s Got:%s\n",
            ast_codec_media_type2str(type),
            ast_codec_media_type2str(ast_stream_get_type(stream)));
         return AST_TEST_FAIL;
      }
   }
   if (check_stream_positions(test, topology)) {
      ast_test_status_update(test, "Initial topology positions failed.\n");
      return AST_TEST_FAIL;
   }

   /* Try to delete outside of topology size */
   if (!ast_stream_topology_del_stream(topology, ast_stream_topology_get_count(topology))) {
      ast_test_status_update(test, "Deleting stream outside of topology succeeded!\n");
      return AST_TEST_FAIL;
   }

   /* Try to delete the last topology stream */
   if (ast_stream_topology_del_stream(topology, ast_stream_topology_get_count(topology) - 1)) {
      ast_test_status_update(test, "Failed deleting last stream of topology.\n");
      return AST_TEST_FAIL;
   }
   if (check_stream_positions(test, topology)) {
      ast_test_status_update(test, "Last stream delete topology positions failed.\n");
      return AST_TEST_FAIL;
   }
   stream = ast_stream_topology_get_stream(topology, ast_stream_topology_get_count(topology) - 1);
   type = ast_stream_get_type(stream);
   if (type != AST_MEDIA_TYPE_END - 2) {
      ast_test_status_update(test, "Last stream delete types failed: Expected:%s Got:%s\n",
         ast_codec_media_type2str(AST_MEDIA_TYPE_END - 2),
         ast_codec_media_type2str(type));
      return AST_TEST_FAIL;
   }

   /* Try to delete the second stream in the topology */
   if (ast_stream_topology_del_stream(topology, 1)) {
      ast_test_status_update(test, "Failed deleting second stream in topology.\n");
      return AST_TEST_FAIL;
   }
   if (check_stream_positions(test, topology)) {
      ast_test_status_update(test, "Second stream delete topology positions failed.\n");
      return AST_TEST_FAIL;
   }
   stream = ast_stream_topology_get_stream(topology, 1);
   type = ast_stream_get_type(stream);
   if (type != AST_MEDIA_TYPE_UNKNOWN + 2) {
      ast_test_status_update(test, "Second stream delete types failed: Expected:%s Got:%s\n",
         ast_codec_media_type2str(AST_MEDIA_TYPE_UNKNOWN + 2),
         ast_codec_media_type2str(type));
      return AST_TEST_FAIL;
   }

   /* Try to delete the first stream in the topology */
   if (ast_stream_topology_del_stream(topology, 0)) {
      ast_test_status_update(test, "Failed deleting first stream in topology.\n");
      return AST_TEST_FAIL;
   }
   if (check_stream_positions(test, topology)) {
      ast_test_status_update(test, "First stream delete topology positions failed.\n");
      return AST_TEST_FAIL;
   }
   stream = ast_stream_topology_get_stream(topology, 0);
   type = ast_stream_get_type(stream);
   if (type != AST_MEDIA_TYPE_UNKNOWN + 2) {
      ast_test_status_update(test, "First stream delete types failed: Expected:%s Got:%s\n",
         ast_codec_media_type2str(AST_MEDIA_TYPE_UNKNOWN + 2),
         ast_codec_media_type2str(type));
      return AST_TEST_FAIL;
   }

   return AST_TEST_PASS;
}

AST_TEST_DEFINE(stream_topology_create_from_format_cap)
{
   RAII_VAR(struct ast_stream_topology *, topology, NULL, ast_stream_topology_free);
   RAII_VAR(struct ast_format_cap *, caps, NULL, ao2_cleanup);

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_topology_create_from_format_cap";
      info->category = "/main/stream/";
      info->summary = "stream topology creation from format capabilities unit test";
      info->description =
         "Test that creating a stream topology from format capabilities results in the expected streams";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   caps = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
   if (!caps) {
      ast_test_status_update(test, "Could not allocate an empty format capabilities structure\n");
      return AST_TEST_FAIL;
   }

   if (ast_format_cap_append(caps, ast_format_ulaw, 0)) {
      ast_test_status_update(test, "Failed to append a ulaw format to capabilities for stream topology creation\n");
      return AST_TEST_FAIL;
   }

   if (ast_format_cap_append(caps, ast_format_alaw, 0)) {
      ast_test_status_update(test, "Failed to append an alaw format to capabilities for stream topology creation\n");
      return AST_TEST_FAIL;
   }

   topology = ast_stream_topology_create_from_format_cap(caps);
   if (!topology) {
      ast_test_status_update(test, "Failed to create a stream topology using a perfectly good format capabilities\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_get_count(topology) != 1) {
      ast_test_status_update(test, "Expected a stream topology with 1 stream but it has %d streams\n",
         ast_stream_topology_get_count(topology));
      return AST_TEST_FAIL;
   }

   if (ast_stream_get_type(ast_stream_topology_get_stream(topology, 0)) != AST_MEDIA_TYPE_AUDIO) {
      ast_test_status_update(test, "Produced stream topology has a single stream of type %s instead of audio\n",
         ast_codec_media_type2str(ast_stream_get_type(ast_stream_topology_get_stream(topology, 0))));
      return AST_TEST_FAIL;
   }

   ast_stream_topology_free(topology);
   topology = NULL;

   ast_format_cap_append(caps, ast_format_h264, 0);

   topology = ast_stream_topology_create_from_format_cap(caps);
   if (!topology) {
      ast_test_status_update(test, "Failed to create a stream topology using a perfectly good format capabilities\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_get_count(topology) != 2) {
      ast_test_status_update(test, "Expected a stream topology with 2 streams but it has %d streams\n",
         ast_stream_topology_get_count(topology));
      return AST_TEST_FAIL;
   }

   if (ast_stream_get_type(ast_stream_topology_get_stream(topology, 0)) != AST_MEDIA_TYPE_AUDIO) {
      ast_test_status_update(test, "Produced stream topology has a first stream of type %s instead of audio\n",
         ast_codec_media_type2str(ast_stream_get_type(ast_stream_topology_get_stream(topology, 0))));
      return AST_TEST_FAIL;
   }

   if (ast_stream_get_type(ast_stream_topology_get_stream(topology, 1)) != AST_MEDIA_TYPE_VIDEO) {
      ast_test_status_update(test, "Produced stream topology has a second stream of type %s instead of video\n",
         ast_codec_media_type2str(ast_stream_get_type(ast_stream_topology_get_stream(topology, 1))));
      return AST_TEST_FAIL;
   }

   return AST_TEST_PASS;
}

AST_TEST_DEFINE(stream_topology_get_first_stream_by_type)
{
   RAII_VAR(struct ast_stream_topology *, topology, NULL, ast_stream_topology_free);
   struct ast_stream *first_stream;
   struct ast_stream *second_stream;
   struct ast_stream *third_stream;
   struct ast_stream *fourth_stream;
   struct ast_stream *fifth_stream;
   struct ast_stream *sixth_stream;

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_topology_get_first_stream_by_type";
      info->category = "/main/stream/";
      info->summary = "stream topology getting first stream by type unit test";
      info->description =
         "Test that getting the first stream by type from a topology actually returns the first stream";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   topology = ast_stream_topology_alloc();
   if (!topology) {
      ast_test_status_update(test, "Failed to create media stream topology\n");
      return AST_TEST_FAIL;
   }

   first_stream = ast_stream_alloc("audio", AST_MEDIA_TYPE_AUDIO);
   if (!first_stream) {
      ast_test_status_update(test, "Failed to create an audio stream for testing stream topology\n");
      return AST_TEST_FAIL;
   }
   ast_stream_set_state(first_stream, AST_STREAM_STATE_REMOVED);

   if (ast_stream_topology_append_stream(topology, first_stream) == -1) {
      ast_test_status_update(test, "Failed to append a perfectly good stream to a topology\n");
      ast_stream_free(first_stream);
      return AST_TEST_FAIL;
   }

   second_stream = ast_stream_alloc("audio2", AST_MEDIA_TYPE_AUDIO);
   if (!second_stream) {
      ast_test_status_update(test, "Failed to create a second audio stream for testing stream topology\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_append_stream(topology, second_stream) == -1) {
      ast_test_status_update(test, "Failed to append a perfectly good stream to a topology\n");
      ast_stream_free(second_stream);
      return AST_TEST_FAIL;
   }

   third_stream = ast_stream_alloc("audio3", AST_MEDIA_TYPE_AUDIO);
   if (!third_stream) {
      ast_test_status_update(test, "Failed to create a third audio stream for testing stream topology\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_append_stream(topology, third_stream) == -1) {
      ast_test_status_update(test, "Failed to append a perfectly good stream to a topology\n");
      ast_stream_free(third_stream);
      return AST_TEST_FAIL;
   }

   fourth_stream = ast_stream_alloc("video", AST_MEDIA_TYPE_VIDEO);
   if (!fourth_stream) {
      ast_test_status_update(test, "Failed to create a video stream for testing stream topology\n");
      return AST_TEST_FAIL;
   }
   ast_stream_set_state(fourth_stream, AST_STREAM_STATE_REMOVED);

   if (ast_stream_topology_append_stream(topology, fourth_stream) == -1) {
      ast_test_status_update(test, "Failed to append a perfectly good stream to a topology\n");
      ast_stream_free(fourth_stream);
      return AST_TEST_FAIL;
   }

   fifth_stream = ast_stream_alloc("video2", AST_MEDIA_TYPE_VIDEO);
   if (!fifth_stream) {
      ast_test_status_update(test, "Failed to create a second video stream for testing stream topology\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_append_stream(topology, fifth_stream) == -1) {
      ast_test_status_update(test, "Failed to append a perfectly good stream to a topology\n");
      ast_stream_free(fifth_stream);
      return AST_TEST_FAIL;
   }

   sixth_stream = ast_stream_alloc("video3", AST_MEDIA_TYPE_VIDEO);
   if (!sixth_stream) {
      ast_test_status_update(test, "Failed to create a third video stream for testing stream topology\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_append_stream(topology, sixth_stream) == -1) {
      ast_test_status_update(test, "Failed to append a perfectly good stream to a topology\n");
      ast_stream_free(sixth_stream);
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_get_first_stream_by_type(topology, AST_MEDIA_TYPE_AUDIO) != second_stream) {
      ast_test_status_update(test, "Retrieved first audio stream from topology but it is not the correct one\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_get_first_stream_by_type(topology, AST_MEDIA_TYPE_VIDEO) != fifth_stream) {
      ast_test_status_update(test, "Retrieved first video stream from topology but it is not the correct one\n");
      return AST_TEST_FAIL;
   }

   return AST_TEST_PASS;
}

static const struct ast_channel_tech mock_channel_tech = {
};

AST_TEST_DEFINE(stream_topology_create_from_channel_nativeformats)
{
   RAII_VAR(struct ast_stream_topology *, topology, NULL, ast_stream_topology_free);
   RAII_VAR(struct ast_format_cap *, caps, NULL, ao2_cleanup);
   struct ast_channel *mock_channel;
   enum ast_test_result_state res = AST_TEST_FAIL;
   struct ast_str *codec_have_buf = ast_str_alloca(AST_FORMAT_CAP_NAMES_LEN);
   struct ast_str *codec_wanted_buf = ast_str_alloca(AST_FORMAT_CAP_NAMES_LEN);

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_topology_create_from_channel_nativeformats";
      info->category = "/main/stream/";
      info->summary = "stream topology creation from channel native formats unit test";
      info->description =
         "Test that creating a stream topology from the setting of channel nativeformats results in the expected streams";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   caps = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
   if (!caps) {
      ast_test_status_update(test, "Could not allocate an empty format capabilities structure\n");
      return AST_TEST_FAIL;
   }

   if (ast_format_cap_append(caps, ast_format_ulaw, 0)) {
      ast_test_status_update(test, "Failed to append a ulaw format to capabilities for channel nativeformats\n");
      return AST_TEST_FAIL;
   }

   if (ast_format_cap_append(caps, ast_format_alaw, 0)) {
      ast_test_status_update(test, "Failed to append an alaw format to capabilities for channel nativeformats\n");
      return AST_TEST_FAIL;
   }

   if (ast_format_cap_append(caps, ast_format_h264, 0)) {
      ast_test_status_update(test, "Failed to append an h264 format to capabilities for channel nativeformats\n");
      return AST_TEST_FAIL;
   }

   mock_channel = ast_channel_alloc(0, AST_STATE_DOWN, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0, "TestChannel");
   if (!mock_channel) {
      ast_test_status_update(test, "Failed to create a mock channel for testing\n");
      return AST_TEST_FAIL;
   }

   ast_channel_tech_set(mock_channel, &mock_channel_tech);
   ast_channel_nativeformats_set(mock_channel, caps);

   if (!ast_channel_get_stream_topology(mock_channel)) {
      ast_test_status_update(test, "Set nativeformats with ulaw, alaw, and h264 on channel but it did not create a topology\n");
      goto end;
   }

   if (ast_stream_topology_get_count(ast_channel_get_stream_topology(mock_channel)) != 2) {
      ast_test_status_update(test, "Set nativeformats on a channel to ulaw, alaw, and h264 and received '%d' streams instead of expected 2\n",
         ast_stream_topology_get_count(ast_channel_get_stream_topology(mock_channel)));
      goto end;
   }

   if (ast_stream_get_type(ast_stream_topology_get_stream(ast_channel_get_stream_topology(mock_channel), 0)) != AST_MEDIA_TYPE_AUDIO) {
      ast_test_status_update(test, "First stream on channel is of %s when it should be audio\n",
         ast_codec_media_type2str(ast_stream_get_type(ast_stream_topology_get_stream(ast_channel_get_stream_topology(mock_channel), 0))));
      goto end;
   }

   ast_format_cap_remove_by_type(caps, AST_MEDIA_TYPE_VIDEO);
   if (!ast_format_cap_identical(ast_stream_get_formats(ast_stream_topology_get_stream(ast_channel_get_stream_topology(mock_channel), 0)), caps)) {
      ast_test_status_update(test, "Formats on audio stream of channel are '%s' when they should be '%s'\n",
         ast_format_cap_get_names(ast_stream_get_formats(ast_stream_topology_get_stream(ast_channel_get_stream_topology(mock_channel), 0)), &codec_have_buf),
         ast_format_cap_get_names(caps, &codec_wanted_buf));
      goto end;
   }

   if (ast_stream_get_type(ast_stream_topology_get_stream(ast_channel_get_stream_topology(mock_channel), 1)) != AST_MEDIA_TYPE_VIDEO) {
      ast_test_status_update(test, "Second stream on channel is of type %s when it should be video\n",
         ast_codec_media_type2str(ast_stream_get_type(ast_stream_topology_get_stream(ast_channel_get_stream_topology(mock_channel), 1))));
      goto end;
   }

   ast_format_cap_remove_by_type(caps, AST_MEDIA_TYPE_AUDIO);

   if (ast_format_cap_append(caps, ast_format_h264, 0)) {
      ast_test_status_update(test, "Failed to append h264 video codec to capabilities for capabilities comparison\n");
      goto end;
   }

   if (!ast_format_cap_identical(ast_stream_get_formats(ast_stream_topology_get_stream(ast_channel_get_stream_topology(mock_channel), 1)), caps)) {
      ast_test_status_update(test, "Formats on video stream of channel are '%s' when they should be '%s'\n",
         ast_format_cap_get_names(ast_stream_get_formats(ast_stream_topology_get_stream(ast_channel_get_stream_topology(mock_channel), 1)), &codec_wanted_buf),
         ast_format_cap_get_names(caps, &codec_wanted_buf));
      goto end;
   }

   res = AST_TEST_PASS;

end:
   ast_channel_unlock(mock_channel);
   ast_hangup(mock_channel);

   return res;
}

struct mock_channel_pvt {
   int mallocd;
   unsigned int wrote;
   unsigned int wrote_stream;
   int stream_num;
   int frame_limit;
   int frame_count;
   int streams;
   int frames_per_read;
   unsigned int indicated_change_request;
   unsigned int indicated_changed;
};

static struct ast_frame *mock_channel_read(struct ast_channel *chan)
{
   struct mock_channel_pvt *pvt = ast_channel_tech_pvt(chan);
   struct ast_frame f = { 0, };
   struct ast_frame *head_frame = NULL;
   struct ast_frame *tail_frame = NULL;
   int i;

   if (pvt->frames_per_read == 0) {
      pvt->frames_per_read = 1;
   }
   for (i = 0; i < pvt->frames_per_read && pvt->frame_count < pvt->frame_limit; i++) {
      struct ast_frame *fr;

      if (pvt->frame_count % 2 == 0) {
         f.frametype = AST_FRAME_VOICE;
         f.subclass.format = ast_format_ulaw;
      } else {
         f.frametype = AST_FRAME_VIDEO;
         f.subclass.format = ast_format_h264;
      }
      f.seqno = pvt->frame_count;
      f.stream_num = pvt->frame_count % pvt->streams;
      pvt->frame_count++;
      fr = ast_frdup(&f);
      if (!head_frame) {
         head_frame = fr;
      } else  {
         tail_frame->frame_list.next = fr;
      }
      tail_frame = fr;
   }

   return(head_frame);
}

static int mock_channel_write(struct ast_channel *chan, struct ast_frame *fr)
{
   struct mock_channel_pvt *pvt = ast_channel_tech_pvt(chan);

   pvt->wrote = 1;

   return 0;
}

static int mock_channel_indicate(struct ast_channel *chan, int condition, const void *data, size_t datalen)
{
   struct mock_channel_pvt *pvt = ast_channel_tech_pvt(chan);

   if (condition == AST_CONTROL_STREAM_TOPOLOGY_REQUEST_CHANGE) {
      pvt->indicated_change_request = 1;
   } else if (condition == AST_CONTROL_STREAM_TOPOLOGY_CHANGED) {
      pvt->indicated_changed = 1;
   }

   return 0;
}

static int mock_channel_write_stream(struct ast_channel *chan, int stream_num, struct ast_frame *fr)
{
   struct mock_channel_pvt *pvt = ast_channel_tech_pvt(chan);

   pvt->wrote_stream = 1;
   pvt->stream_num = stream_num;

   return 0;
}

static const struct ast_channel_tech mock_stream_channel_tech = {
   .read_stream = mock_channel_read,
   .write_stream = mock_channel_write_stream,
};

AST_TEST_DEFINE(stream_topology_channel_set)
{
   RAII_VAR(struct ast_stream_topology *, topology, NULL, ast_stream_topology_free);
   struct ast_channel *mock_channel;
   enum ast_test_result_state res = AST_TEST_PASS;

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_topology_channel_set";
      info->category = "/main/stream/";
      info->summary = "stream topology setting on a channel unit test";
      info->description =
         "Test that setting a stream topology on a channel works";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   topology = ast_stream_topology_alloc();
   if (!topology) {
      ast_test_status_update(test, "Failed to create media stream topology\n");
      return AST_TEST_FAIL;
   }

   mock_channel = ast_channel_alloc(0, AST_STATE_DOWN, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0, "TestChannel");
   if (!mock_channel) {
      ast_test_status_update(test, "Failed to create a mock channel for testing\n");
      return AST_TEST_FAIL;
   }

   ast_channel_tech_set(mock_channel, &mock_stream_channel_tech);
   ast_channel_set_stream_topology(mock_channel, topology);

   if (ast_channel_get_stream_topology(mock_channel) != topology) {
      ast_test_status_update(test, "Set an explicit stream topology on a channel but the returned one did not match it\n");
      res = AST_TEST_FAIL;
   }

   topology = NULL;
   ast_channel_unlock(mock_channel);
   ast_hangup(mock_channel);

   return res;
}

static int mock_channel_hangup(struct ast_channel *chan)
{
   struct mock_channel_pvt *pvt = ast_channel_tech_pvt(chan);

   if (pvt->mallocd) {
      ast_free(pvt);
   }

   ast_channel_tech_pvt_set(chan, NULL);
   return 0;
}

static const struct ast_channel_tech mock_channel_old_write_tech = {
   .write = mock_channel_write,
   .write_video = mock_channel_write,
   .hangup = mock_channel_hangup,
};

AST_TEST_DEFINE(stream_write_non_multistream)
{
   RAII_VAR(struct ast_format_cap *, caps, NULL, ao2_cleanup);
   struct ast_channel *mock_channel;
   struct mock_channel_pvt pvt = { 0, };
   enum ast_test_result_state res = AST_TEST_FAIL;
   struct ast_frame frame = { 0, };

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_write_non_multistream";
      info->category = "/main/stream/";
      info->summary = "stream writing to non-multistream capable channel test";
      info->description =
         "Test that writing frames to a non-multistream channel works as expected";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   caps = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
   if (!caps) {
      ast_test_status_update(test, "Could not allocate an empty format capabilities structure\n");
      return AST_TEST_FAIL;
   }

   if (ast_format_cap_append(caps, ast_format_ulaw, 0)) {
      ast_test_status_update(test, "Failed to append a ulaw format to capabilities for channel nativeformats\n");
      return AST_TEST_FAIL;
   }

   if (ast_format_cap_append(caps, ast_format_h264, 0)) {
      ast_test_status_update(test, "Failed to append an h264 format to capabilities for channel nativeformats\n");
      return AST_TEST_FAIL;
   }

   mock_channel = ast_channel_alloc(0, AST_STATE_DOWN, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0, "TestChannel");
   if (!mock_channel) {
      ast_test_status_update(test, "Failed to create a mock channel for testing\n");
      return AST_TEST_FAIL;
   }

   ast_channel_tech_set(mock_channel, &mock_channel_old_write_tech);
   ast_channel_nativeformats_set(mock_channel, caps);

   pvt.wrote = 0;
   ast_channel_tech_pvt_set(mock_channel, &pvt);
   ast_channel_unlock(mock_channel);

   frame.frametype = AST_FRAME_VOICE;
   frame.subclass.format = ast_format_ulaw;

   if (ast_write(mock_channel, &frame)) {
      ast_test_status_update(test, "Failed to write a ulaw frame to the mock channel when it should be fine\n");
      goto end;
   }

   if (!pvt.wrote) {
      ast_test_status_update(test, "Successfully wrote a frame of ulaw but it never reached the channel driver\n");
      goto end;
   }

   pvt.wrote = 0;

   if (!ast_write_stream(mock_channel, 2, &frame) || pvt.wrote) {
      ast_test_status_update(test, "Successfully wrote a frame of ulaw to a non-existent stream\n");
      goto end;
   }

   frame.frametype = AST_FRAME_VIDEO;
   frame.subclass.format = ast_format_h264;

   if (ast_write(mock_channel, &frame)) {
      ast_test_status_update(test, "Failed to write an h264 frame to the mock channel when it should be fine\n");
      goto end;
   }

   if (!pvt.wrote) {
      ast_test_status_update(test, "Successfully wrote a frame of h264 but it never reached the channel driver\n");
      goto end;
   }

   res = AST_TEST_PASS;

end:
   ast_hangup(mock_channel);

   return res;
}

static const struct ast_channel_tech mock_channel_write_stream_tech = {
   .write = mock_channel_write,
   .write_video = mock_channel_write,
   .write_stream = mock_channel_write_stream,
   .read_stream = mock_channel_read,
   .hangup = mock_channel_hangup,
};

AST_TEST_DEFINE(stream_write_multistream)
{
   RAII_VAR(struct ast_format_cap *, caps, NULL, ao2_cleanup);
   RAII_VAR(struct ast_stream_topology *, topology, NULL, ast_stream_topology_free);
   struct ast_stream *stream;
   struct ast_channel *mock_channel;
   struct mock_channel_pvt pvt = { 0, };
   enum ast_test_result_state res = AST_TEST_FAIL;
   struct ast_frame frame = { 0, };

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_write_multistream";
      info->category = "/main/stream/";
      info->summary = "stream writing to multistream capable channel test";
      info->description =
         "Test that writing frames to a multistream channel works as expected";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   topology = ast_stream_topology_alloc();
   if (!topology) {
      ast_test_status_update(test, "Failed to create media stream topology\n");
      return AST_TEST_FAIL;
   }

   stream = ast_stream_alloc("audio", AST_MEDIA_TYPE_AUDIO);
   if (!stream) {
      ast_test_status_update(test, "Failed to create an audio stream for testing multistream writing\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_append_stream(topology, stream) == -1) {
      ast_test_status_update(test, "Failed to append a perfectly good stream to a topology\n");
      ast_stream_free(stream);
      return AST_TEST_FAIL;
   }

   stream = ast_stream_alloc("audio2", AST_MEDIA_TYPE_AUDIO);
   if (!stream) {
      ast_test_status_update(test, "Failed to create an audio stream for testing multistream writing\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_append_stream(topology, stream) == -1) {
      ast_test_status_update(test, "Failed to append a perfectly good stream to a topology\n");
      ast_stream_free(stream);
      return AST_TEST_FAIL;
   }

   stream = ast_stream_alloc("video", AST_MEDIA_TYPE_VIDEO);
   if (!stream) {
      ast_test_status_update(test, "Failed to create a video stream for testing multistream writing\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_append_stream(topology, stream) == -1) {
      ast_test_status_update(test, "Failed to append a perfectly good stream to a topology\n");
      ast_stream_free(stream);
      return AST_TEST_FAIL;
   }

   stream = ast_stream_alloc("video2", AST_MEDIA_TYPE_VIDEO);
   if (!stream) {
      ast_test_status_update(test, "Failed to create a video stream for testing multistream writing\n");
      return AST_TEST_FAIL;
   }

   if (ast_stream_topology_append_stream(topology, stream) == -1) {
      ast_test_status_update(test, "Failed to append a perfectly good stream to a topology\n");
      ast_stream_free(stream);
      return AST_TEST_FAIL;
   }

   caps = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
   if (!caps) {
      ast_test_status_update(test, "Could not allocate an empty format capabilities structure\n");
      return AST_TEST_FAIL;
   }

   if (ast_format_cap_append(caps, ast_format_ulaw, 0)) {
      ast_test_status_update(test, "Failed to append a ulaw format to capabilities for channel nativeformats\n");
      return AST_TEST_FAIL;
   }

   if (ast_format_cap_append(caps, ast_format_h264, 0)) {
      ast_test_status_update(test, "Failed to append an h264 format to capabilities for channel nativeformats\n");
      return AST_TEST_FAIL;
   }

   mock_channel = ast_channel_alloc(0, AST_STATE_DOWN, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0, "TestChannel");
   if (!mock_channel) {
      ast_test_status_update(test, "Failed to create a mock channel for testing\n");
      return AST_TEST_FAIL;
   }

   ast_channel_tech_set(mock_channel, &mock_channel_write_stream_tech);
   ast_channel_set_stream_topology(mock_channel, topology);
   ast_channel_nativeformats_set(mock_channel, caps);
   topology = NULL;

   ast_channel_tech_pvt_set(mock_channel, &pvt);
   ast_channel_unlock(mock_channel);

   frame.frametype = AST_FRAME_VOICE;
   frame.subclass.format = ast_format_ulaw;
   pvt.stream_num = -1;

   if (ast_write(mock_channel, &frame)) {
      ast_test_status_update(test, "Failed to write a ulaw frame to the mock channel when it should be fine\n");
      goto end;
   }

   if (pvt.wrote) {
      ast_test_status_update(test, "Successfully wrote a frame of ulaw but it ended up on the old write callback instead of write_stream\n");
      goto end;
   }

   if (!pvt.wrote_stream) {
      ast_test_status_update(test, "Successfully wrote a frame of ulaw but it never reached the channel driver\n");
      goto end;
   }

   if (pvt.stream_num != 0) {
      ast_test_status_update(test, "Successfully wrote a frame of ulaw to the default stream but it ended up on stream %d and not 0\n",
         pvt.stream_num);
      goto end;
   }

   pvt.wrote_stream = 0;
   pvt.stream_num = -1;

   if (ast_write_stream(mock_channel, 0, &frame)) {
      ast_test_status_update(test, "Failed to write a ulaw frame to the first audio stream\n");
      goto end;
   }

   if (pvt.wrote) {
      ast_test_status_update(test, "Successfully wrote a frame of ulaw to the first audio stream but it ended up on the old write callback instead of write_stream\n");
      goto end;
   }

   if (!pvt.wrote_stream) {
      ast_test_status_update(test, "Successfully wrote a frame of ulaw to the first audio stream but it never reached the channel driver\n");
      goto end;
   }

   if (pvt.stream_num != 0) {
      ast_test_status_update(test, "Successfully wrote a frame of ulaw to the first audio stream but it ended up on stream %d and not 0\n",
         pvt.stream_num);
      goto end;
   }

   pvt.wrote_stream = 0;
   pvt.stream_num = -1;

   if (ast_write_stream(mock_channel, 1, &frame)) {
      ast_test_status_update(test, "Failed to write a ulaw frame to the second audio stream\n");
      goto end;
   }

   if (pvt.wrote) {
      ast_test_status_update(test, "Successfully wrote a frame of ulaw to the second audio stream but it ended up on the old write callback instead of write_stream\n");
      goto end;
   }

   if (!pvt.wrote_stream) {
      ast_test_status_update(test, "Successfully wrote a frame of ulaw to the second audio stream but it never reached the channel driver\n");
      goto end;
   }

   if (pvt.stream_num != 1) {
      ast_test_status_update(test, "Successfully wrote a frame of ulaw to the second audio stream but it ended up on stream %d and not 1\n",
         pvt.stream_num);
      goto end;
   }

   pvt.wrote_stream = 0;
   pvt.stream_num = -1;

   frame.frametype = AST_FRAME_VIDEO;
   frame.subclass.format = ast_format_h264;

   if (ast_write(mock_channel, &frame)) {
      ast_test_status_update(test, "Failed to write an h264 frame to the mock channel when it should be fine\n");
      goto end;
   }

   if (pvt.wrote) {
      ast_test_status_update(test, "Successfully wrote a frame of h264 but it ended up on the old write callback instead of write_stream\n");
      goto end;
   }

   if (!pvt.wrote_stream) {
      ast_test_status_update(test, "Successfully wrote a frame of h264 but it never reached the channel driver\n");
      goto end;
   }

   if (pvt.stream_num != 2) {
      ast_test_status_update(test, "Successfully wrote a frame of h264 to the default stream but it ended up on stream %d and not 2\n",
         pvt.stream_num);
      goto end;
   }

   pvt.wrote_stream = 0;
   pvt.stream_num = -1;

   if (ast_write_stream(mock_channel, 2, &frame)) {
      ast_test_status_update(test, "Failed to write an h264 frame to the first video stream\n");
      goto end;
   }

   if (pvt.wrote) {
      ast_test_status_update(test, "Successfully wrote a frame of h264 to the first video stream but it ended up on the old write callback instead of write_stream\n");
      goto end;
   }

   if (!pvt.wrote_stream) {
      ast_test_status_update(test, "Successfully wrote a frame of h264 to the first video stream but it never reached the channel driver\n");
      goto end;
   }

   if (pvt.stream_num != 2) {
      ast_test_status_update(test, "Successfully wrote a frame of h264 to the first video stream but it ended up on stream %d and not 2\n",
         pvt.stream_num);
      goto end;
   }

   pvt.wrote_stream = 0;
   pvt.stream_num = -1;

   if (ast_write_stream(mock_channel, 3, &frame)) {
      ast_test_status_update(test, "Failed to write an h264 frame to the second video stream\n");
      goto end;
   }

   if (pvt.wrote) {
      ast_test_status_update(test, "Successfully wrote a frame of h264 to the second video stream but it ended up on the old write callback instead of write_stream\n");
      goto end;
   }

   if (!pvt.wrote_stream) {
      ast_test_status_update(test, "Successfully wrote a frame of h264 to the second video stream but it never reached the channel driver\n");
      goto end;
   }

   if (pvt.stream_num != 3) {
      ast_test_status_update(test, "Successfully wrote a frame of h264 to the second video stream but it ended up on stream %d and not 3\n",
         pvt.stream_num);
      goto end;
   }

   pvt.wrote_stream = 0;
   pvt.stream_num = -1;

   if (!ast_write_stream(mock_channel, 9, &frame)) {
      ast_test_status_update(test, "Successfully wrote a frame of h264 to a non-existent stream\n");
      goto end;
   }

   if (pvt.wrote) {
      ast_test_status_update(test, "Successfully wrote a frame of h264 to a non-existent stream and it ended up on the old write callback\n");
      goto end;
   }

   if (pvt.wrote_stream) {
      ast_test_status_update(test, "Successfully wrote a frame of h264 to a non-existent stream and it ended up on the write_stream callback\n");
      goto end;
   }

   res = AST_TEST_PASS;

end:
   ast_hangup(mock_channel);

   return res;
}

static int load_stream_readqueue(struct ast_channel *chan, int frames)
{
   struct mock_channel_pvt *pvt = ast_channel_tech_pvt(chan);
   struct ast_frame f = { 0, };
   struct ast_frame *frame = NULL;
   int i;

   while ((frame = AST_LIST_REMOVE_HEAD(ast_channel_readq(chan), frame_list)))
         ast_frfree(frame);

   for (i = 0; i < frames; i++) {
      if (pvt->frame_count % 2 == 0) {
         f.frametype = AST_FRAME_VOICE;
         f.subclass.format = ast_format_ulaw;
      } else {
         f.frametype = AST_FRAME_VIDEO;
         f.subclass.format = ast_format_h264;
      }
      f.stream_num = pvt->frame_count % pvt->streams;
      f.seqno = pvt->frame_count;
      ast_queue_frame(chan, &f);
      pvt->frame_count++;
   }

   return 0;
}

static struct ast_channel *make_channel(struct ast_test *test, int streams,
      struct ast_channel_tech *tech)
{
   RAII_VAR(struct ast_format_cap *, caps, NULL, ao2_cleanup);
   struct ast_channel *mock_channel = NULL;
   struct mock_channel_pvt *pvt = NULL;
   struct ast_stream_topology *topology = NULL;
   struct ast_stream *stream;
   enum ast_test_result_state res = AST_TEST_PASS;
   int i;

   mock_channel = ast_channel_alloc(0, AST_STATE_DOWN, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0, "TestChannel");
   ast_test_validate_cleanup(test, mock_channel, res, done);
   ast_channel_tech_set(mock_channel, tech);

   if (tech->read_stream) {
      topology = ast_stream_topology_alloc();
      ast_test_validate_cleanup(test, topology, res, done);

      for (i = 0; i < streams; i++) {
         stream = ast_stream_alloc((i % 2 ? "video": "audio"), (i % 2 ? AST_MEDIA_TYPE_VIDEO : AST_MEDIA_TYPE_AUDIO));
         ast_test_validate_cleanup(test, stream, res, done);
         ast_test_validate_cleanup(test, ast_stream_topology_append_stream(topology, stream) == i, res, done);
      }
      ast_test_validate_cleanup(test, ast_stream_topology_get_count(topology) == streams, res, done);
      ast_channel_set_stream_topology(mock_channel, topology);
      topology = NULL;
   } else {
      caps = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
      ast_test_validate_cleanup(test, caps, res, done);

      ast_test_validate_cleanup(test, ast_format_cap_append(caps, ast_format_ulaw, 0) == 0, res, done);
      ast_test_validate_cleanup(test, ast_format_cap_append(caps, ast_format_h264, 0) == 0, res, done);
      ast_channel_nativeformats_set(mock_channel, caps);
   }

   pvt = ast_calloc(1, sizeof(*pvt));
   ast_test_validate_cleanup(test, pvt, res, done);
   pvt->mallocd = 1;
   ast_channel_tech_pvt_set(mock_channel, pvt);

   ast_channel_unlock(mock_channel);

done:
   ast_stream_topology_free(topology);
   if (res == AST_TEST_FAIL && mock_channel) {
      ast_hangup(mock_channel);
   }

   return mock_channel;
}

enum CHANNEL_READ_TYPE {
   CHANNEL_READ,
   CHANNEL_READ_STREAM
};

static struct ast_frame *read_from_chan(enum CHANNEL_READ_TYPE rt, struct ast_channel *chan)
{
   if (rt == CHANNEL_READ_STREAM) {
      return ast_read_stream(chan);
   } else {
      return ast_read(chan);
   }
}

static enum ast_test_result_state read_test(struct ast_test *test, struct ast_channel_tech *tech,
      enum CHANNEL_READ_TYPE rt, int streams, int frames, int frames_per_read, int expected_nulls)
{
   struct ast_channel *mock_channel;
   struct mock_channel_pvt *pvt;
   struct ast_frame *fr = NULL;
   enum ast_test_result_state res = AST_TEST_PASS;
   int i = 0;
   int null_frames = 0;

   ast_test_status_update(test, "ChanType: %s ReadType: %s Streams: %d Frames: %d Frames per read: %d Expected Nulls: %d\n",
         tech->read_stream ? "MULTI" : "NON-MULTI",
         rt == CHANNEL_READ_STREAM ? "STREAM" : "NON-STREAM",
         streams, frames, frames_per_read, expected_nulls);
   mock_channel = make_channel(test, 4, tech);
   ast_test_validate_cleanup(test, mock_channel, res, done);

   pvt = ast_channel_tech_pvt(mock_channel);
   pvt->frame_count = 0;
   pvt->frame_limit = frames;
   pvt->streams = streams;
   pvt->frames_per_read = frames_per_read;

   load_stream_readqueue(mock_channel, frames / 2);
   ast_channel_fdno_set(mock_channel, 0);

   while ((fr = read_from_chan(rt, mock_channel))) {
      ast_channel_fdno_set(mock_channel, 0);
      if (fr->frametype != AST_FRAME_NULL) {
         ast_test_validate_cleanup(test, i == fr->seqno, res, done);
         ast_test_validate_cleanup(test, fr->frametype == ( i % 2 ? AST_FRAME_VIDEO : AST_FRAME_VOICE), res, done);
         ast_test_validate_cleanup(test, fr->stream_num == ( i % streams ), res, done);
         ast_frfree(fr);
      } else {
         null_frames++;
      }
      fr = NULL;
      i++;
   }
   ast_test_validate_cleanup(test, i == frames, res, done);
   ast_test_validate_cleanup(test, null_frames == expected_nulls, res, done);

done:
   ast_test_status_update(test, "    Frames read: %d NULL frames: %d\n", i, null_frames);
   ast_hangup(mock_channel);

   return res;
}

AST_TEST_DEFINE(stream_read_non_multistream)
{
   struct ast_channel_tech tech = {
      .read = mock_channel_read,
      .hangup = mock_channel_hangup,
   };

   enum ast_test_result_state res = AST_TEST_PASS;

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_read_non_multistream";
      info->category = "/main/stream/";
      info->summary = "stream reading from non-multistream capable channel test";
      info->description =
         "Test that reading frames from a non-multistream channel works as expected";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   res = read_test(test, &tech, CHANNEL_READ, 2, 16, 1, 0);
   ast_test_validate(test, res == AST_TEST_PASS, "non multi, non read stream, 2 stream");

   res = read_test(test, &tech, CHANNEL_READ_STREAM, 2, 16, 1, 0);
   ast_test_validate(test, res == AST_TEST_PASS, "non multi, read stream, 2 stream");

   res = read_test(test, &tech, CHANNEL_READ, 2, 16, 3, 0);
   ast_test_validate(test, res == AST_TEST_PASS, "non multi, non read stream, 2 stream, 3 frames per read");

   res = read_test(test, &tech, CHANNEL_READ_STREAM, 2, 16, 3, 0);
   ast_test_validate(test, res == AST_TEST_PASS, "non multi, read stream, 2 stream, 3 frames per read");

   return res;
}

AST_TEST_DEFINE(stream_read_multistream)
{
   struct ast_channel_tech tech = {
      .read_stream = mock_channel_read,
      .write_stream = mock_channel_write_stream,
      .hangup = mock_channel_hangup,
   };
   enum ast_test_result_state res = AST_TEST_PASS;

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_read_multistream";
      info->category = "/main/stream/";
      info->summary = "stream reading from multistream capable channel test";
      info->description =
         "Test that reading frames from a multistream channel works as expected";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   res = read_test(test, &tech, CHANNEL_READ, 2, 16, 1, 0);
   ast_test_validate(test, res == AST_TEST_PASS, "multi, non read stream, 2 stream");

   res = read_test(test, &tech, CHANNEL_READ_STREAM, 2, 16, 1, 0);
   ast_test_validate(test, res == AST_TEST_PASS, "multi, read stream, 2 stream");

   res = read_test(test, &tech, CHANNEL_READ, 4, 16, 1, 8);
   ast_test_validate(test, res == AST_TEST_PASS, "multi, non read stream, 4 stream");

   res = read_test(test, &tech, CHANNEL_READ_STREAM, 4, 16, 1, 0);
   ast_test_validate(test, res == AST_TEST_PASS, "multi, read stream, 4 stream");

   res = read_test(test, &tech, CHANNEL_READ, 2, 16, 3, 0);
   ast_test_validate(test, res == AST_TEST_PASS, "multi, non read stream, 2 stream, 3 frames per read");

   res = read_test(test, &tech, CHANNEL_READ_STREAM, 2, 16, 3, 0);
   ast_test_validate(test, res == AST_TEST_PASS, "multi, read stream, 2 stream, 3 frames per read");

   res = read_test(test, &tech, CHANNEL_READ, 4, 16, 3, 8);
   ast_test_validate(test, res == AST_TEST_PASS, "multi, non read stream, 4 stream, 3 frames per read");

   res = read_test(test, &tech, CHANNEL_READ_STREAM, 4, 16, 3, 0);
   ast_test_validate(test, res == AST_TEST_PASS, "multi, read stream, 4 stream, 3 frames per read");

   return res;
}

AST_TEST_DEFINE(stream_topology_change_request_from_application_non_multistream)
{
   struct ast_channel_tech tech = {
      .read = mock_channel_read,
      .indicate = mock_channel_indicate,
      .hangup = mock_channel_hangup,
   };
   struct ast_channel *mock_channel;
   struct mock_channel_pvt *pvt;
   enum ast_test_result_state res = AST_TEST_PASS;
   int change_res;
   RAII_VAR(struct ast_stream_topology *, topology, NULL, ast_stream_topology_free);

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_topology_change_request_from_application_non_multistream";
      info->category = "/main/stream/";
      info->summary = "stream topology changing on non-multistream channel test";
      info->description =
         "Test that an application trying to change the stream topology of a non-multistream channel gets a failure";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   mock_channel = make_channel(test, 1, &tech);
   ast_test_validate_cleanup(test, mock_channel, res, done);

   pvt = ast_channel_tech_pvt(mock_channel);
   pvt->indicated_change_request = 0;
   pvt->indicated_changed = 0;

   topology = ast_stream_topology_alloc();
   ast_test_validate_cleanup(test, topology, res, done);

   change_res = ast_channel_request_stream_topology_change(mock_channel, topology, NULL);

   ast_test_validate_cleanup(test, change_res == -1, res, done);
   ast_test_validate_cleanup(test, !pvt->indicated_change_request, res, done);

   ast_channel_lock(mock_channel);
   change_res = ast_channel_stream_topology_changed(mock_channel, topology);
   ast_channel_unlock(mock_channel);

   ast_test_validate_cleanup(test, change_res == -1, res, done);
   ast_test_validate_cleanup(test, !pvt->indicated_changed, res, done);

done:
   ast_hangup(mock_channel);

   return res;
}

AST_TEST_DEFINE(stream_topology_change_request_from_channel_non_multistream)
{
   struct ast_channel_tech tech = {
      .read_stream = mock_channel_read,
      .write_stream = mock_channel_write_stream,
      .indicate = mock_channel_indicate,
      .hangup = mock_channel_hangup,
   };
   struct ast_channel *mock_channel;
   struct mock_channel_pvt *pvt;
   enum ast_test_result_state res = AST_TEST_PASS;
   RAII_VAR(struct ast_stream_topology *, topology, NULL, ast_stream_topology_free);
   struct ast_frame request_change = {
      .frametype = AST_FRAME_CONTROL,
      .subclass.integer = AST_CONTROL_STREAM_TOPOLOGY_REQUEST_CHANGE,
   };
   struct ast_frame *fr = NULL;

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_topology_change_request_from_channel_non_multistream";
      info->category = "/main/stream/";
      info->summary = "channel requesting stream topology change to non-multistream application test";
      info->description =
         "Test that a channel requesting a stream topology change from a non-multistream application does not work";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   mock_channel = make_channel(test, 1, &tech);
   ast_test_validate_cleanup(test, mock_channel, res, done);

   pvt = ast_channel_tech_pvt(mock_channel);
   pvt->indicated_changed = 0;

   topology = ast_stream_topology_alloc();
   ast_test_validate_cleanup(test, topology, res, done);

   request_change.data.ptr = topology;
   ast_queue_frame(mock_channel, &request_change);

   fr = ast_read(mock_channel);
   ast_test_validate_cleanup(test, fr, res, done);
   ast_test_validate_cleanup(test, fr == &ast_null_frame, res, done);
   ast_test_validate_cleanup(test, pvt->indicated_changed, res, done);

done:
   if (fr) {
      ast_frfree(fr);
   }
   ast_hangup(mock_channel);

   return res;
}

AST_TEST_DEFINE(stream_topology_change_request_from_application)
{
   struct ast_channel_tech tech = {
      .read_stream = mock_channel_read,
      .write_stream = mock_channel_write_stream,
      .indicate = mock_channel_indicate,
      .hangup = mock_channel_hangup,
   };
   struct ast_channel *mock_channel;
   struct mock_channel_pvt *pvt;
   enum ast_test_result_state res = AST_TEST_PASS;
   int change_res;
   RAII_VAR(struct ast_stream_topology *, topology, NULL, ast_stream_topology_free);

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_topology_change_request_from_application";
      info->category = "/main/stream/";
      info->summary = "stream topology change request from application test";
      info->description =
         "Test that an application changing the stream topology of a multistream capable channel receives success";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   mock_channel = make_channel(test, 1, &tech);
   ast_test_validate_cleanup(test, mock_channel, res, done);

   pvt = ast_channel_tech_pvt(mock_channel);
   pvt->indicated_change_request = 0;
   pvt->indicated_changed = 0;

   topology = ast_stream_topology_alloc();
   ast_test_validate_cleanup(test, topology, res, done);

   change_res = ast_channel_request_stream_topology_change(mock_channel, topology, NULL);

   ast_test_validate_cleanup(test, !change_res, res, done);
   ast_test_validate_cleanup(test, pvt->indicated_change_request, res, done);

   ast_channel_lock(mock_channel);
   change_res = ast_channel_stream_topology_changed(mock_channel, topology);
   ast_channel_unlock(mock_channel);

   ast_test_validate_cleanup(test, !change_res, res, done);
   ast_test_validate_cleanup(test, pvt->indicated_changed, res, done);

done:
   ast_hangup(mock_channel);

   return res;
}

AST_TEST_DEFINE(stream_topology_change_request_from_channel)
{
   struct ast_channel_tech tech = {
      .read_stream = mock_channel_read,
      .write_stream = mock_channel_write_stream,
      .indicate = mock_channel_indicate,
      .hangup = mock_channel_hangup,
   };
   struct ast_channel *mock_channel;
   struct mock_channel_pvt *pvt;
   enum ast_test_result_state res = AST_TEST_PASS;
   RAII_VAR(struct ast_stream_topology *, topology, NULL, ast_stream_topology_free);
   struct ast_frame request_change = {
      .frametype = AST_FRAME_CONTROL,
      .subclass.integer = AST_CONTROL_STREAM_TOPOLOGY_REQUEST_CHANGE,
   };
   struct ast_frame *fr = NULL;

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_topology_change_request_from_channel";
      info->category = "/main/stream/";
      info->summary = "channel requesting stream topology change to multistream application test";
      info->description =
         "Test that a channel requesting a stream topology change from a multistream application works";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   mock_channel = make_channel(test, 1, &tech);
   ast_test_validate_cleanup(test, mock_channel, res, done);

   pvt = ast_channel_tech_pvt(mock_channel);
   pvt->indicated_changed = 0;

   topology = ast_stream_topology_alloc();
   ast_test_validate_cleanup(test, topology, res, done);

   request_change.data.ptr = topology;
   ast_queue_frame(mock_channel, &request_change);

   fr = ast_read_stream(mock_channel);
   ast_test_validate_cleanup(test, fr, res, done);
   ast_test_validate_cleanup(test, fr->frametype == AST_FRAME_CONTROL, res, done);
   ast_test_validate_cleanup(test, fr->subclass.integer == AST_CONTROL_STREAM_TOPOLOGY_REQUEST_CHANGE, res, done);
   ast_test_validate_cleanup(test, !pvt->indicated_changed, res, done);

done:
   if (fr) {
      ast_frfree(fr);
   }
   ast_hangup(mock_channel);

   return res;
}

AST_TEST_DEFINE(format_cap_from_stream_topology)
{
   RAII_VAR(struct ast_format_cap *, caps, NULL, ao2_cleanup);
   RAII_VAR(struct ast_format_cap *, stream_caps, NULL, ao2_cleanup);
   struct ast_stream_topology *topology;
   struct ast_stream *stream;
   struct ast_format_cap *new_cap;

   switch (cmd) {
   case TEST_INIT:
      info->name = "format_cap_from_stream_topology";
      info->category = "/main/stream/";
      info->summary = "stream topology to format capabilities conversion test";
      info->description =
         "Test that converting a stream topology to format capabilities results in expected formats";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   caps = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
   if (!caps) {
      ast_test_status_update(test, "Could not allocate an empty format capabilities structure\n");
      return AST_TEST_FAIL;
   }

   if (ast_format_cap_append(caps, ast_format_ulaw, 0)) {
      ast_test_status_update(test, "Failed to append ulaw format to capabilities\n");
      return AST_TEST_FAIL;
   }

   if (ast_format_cap_append(caps, ast_format_h264, 0)) {
      ast_test_status_update(test, "Failed to append h264 format to capabilities\n");
      return AST_TEST_FAIL;
   }

   topology = ast_stream_topology_create_from_format_cap(caps);
   if (!topology) {
      ast_test_status_update(test, "Failed to create a stream topology from format capabilities of ulaw and h264\n");
      return AST_TEST_FAIL;
   }

   /*
    * Append declined stream with formats that should not be included
    * in combined topology caps.
    */
   stream = ast_stream_alloc("audio", AST_MEDIA_TYPE_AUDIO);
   if (!stream) {
      ast_test_status_update(test, "Failed to create an audio stream for testing stream topology\n");
      ast_stream_topology_free(topology);
      return AST_TEST_FAIL;
   }
   ast_stream_set_state(stream, AST_STREAM_STATE_REMOVED);
   new_cap = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
   if (!new_cap) {
      ast_test_status_update(test, "Could not allocate an empty format capabilities structure\n");
      ast_stream_free(stream);
      ast_stream_topology_free(topology);
      return AST_TEST_FAIL;
   }
   if (ast_format_cap_append(new_cap, ast_format_alaw, 0)) {
      ast_test_status_update(test, "Failed to append alaw format to capabilities\n");
      ao2_cleanup(new_cap);
      ast_stream_free(stream);
      ast_stream_topology_free(topology);
      return AST_TEST_FAIL;
   }
   ast_stream_set_formats(stream, new_cap);
   ao2_cleanup(new_cap);
   if (ast_stream_topology_append_stream(topology, stream) == -1) {
      ast_test_status_update(test, "Failed to append a perfectly good stream to a topology\n");
      ast_stream_free(stream);
      ast_stream_topology_free(topology);
      return AST_TEST_FAIL;
   }

   stream_caps = ast_stream_topology_get_formats(topology);
   if (!stream_caps) {
      ast_test_status_update(test, "Failed to create a format capabilities from a stream topology\n");
      ast_stream_topology_free(topology);
      return AST_TEST_FAIL;
   }

   ast_stream_topology_free(topology);

   if (!ast_format_cap_identical(caps, stream_caps)) {
      ast_test_status_update(test, "Converting format capabilities into topology and back resulted in different formats\n");
      return AST_TEST_FAIL;
   }

   return AST_TEST_PASS;
}

#define topology_append_stream(topology, name, type, res, label) \
   do { \
      struct ast_stream *__stream = ast_stream_alloc((name), (type)); \
      ast_test_validate_cleanup(test, __stream, res, label); \
      if (ast_stream_topology_append_stream((topology), __stream) < 0) { \
         ast_stream_free(__stream); \
         res = AST_TEST_FAIL; \
         goto label;      \
      } \
   } while(0)

AST_TEST_DEFINE(stream_topology_map_create)
{
   RAII_VAR(struct ast_stream_topology *, t0, NULL, ast_stream_topology_free);

   struct ast_vector_int types = { NULL };
   struct ast_vector_int v0 = { NULL };
   struct ast_vector_int v1 = { NULL };

   enum ast_test_result_state res = AST_TEST_PASS;

   switch (cmd) {
   case TEST_INIT:
      info->name = "stream_topology_map_create";
      info->category = "/main/stream/";
      info->summary = "stream topology map creation unit test";
      info->description =
         "Test that creating a stream topology map works";
      return AST_TEST_NOT_RUN;
   case TEST_EXECUTE:
      break;
   }

   ast_test_validate(test, AST_VECTOR_INIT(&types, 5) == 0);

   /* Map a first topology and check that it mapped one to one */
   ast_test_validate_cleanup(test, (t0 = ast_stream_topology_alloc()), res, done);
   topology_append_stream(t0, "audio", AST_MEDIA_TYPE_AUDIO, res, done);
   topology_append_stream(t0, "video", AST_MEDIA_TYPE_VIDEO, res, done);

   ast_stream_topology_map(t0, &types, &v0, &v1);
   ast_test_validate_cleanup(test, AST_VECTOR_SIZE(&types) == 2, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&types, 0) == AST_MEDIA_TYPE_AUDIO, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&types, 1) == AST_MEDIA_TYPE_VIDEO, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&v0, 0) == 0, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&v0, 1) == 1, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&v1, 0) == 0, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&v1, 1) == 1, res, done);

   /* Map a second topology and check that it merged */
   ast_stream_topology_free(t0);
   ast_test_validate_cleanup(test, (t0 = ast_stream_topology_alloc()), res, done);
   topology_append_stream(t0, "video", AST_MEDIA_TYPE_VIDEO, res, done);
   topology_append_stream(t0, "audio", AST_MEDIA_TYPE_AUDIO, res, done);

   ast_stream_topology_map(t0, &types, &v0, &v1);
   ast_test_validate_cleanup(test, AST_VECTOR_SIZE(&types) == 2, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&types, 0) == AST_MEDIA_TYPE_AUDIO, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&types, 1) == AST_MEDIA_TYPE_VIDEO, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&v0, 0) == 1, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&v0, 1) == 0, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&v1, 0) == 1, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&v1, 1) == 0, res, done);

   /* Map a third topology with more streams and check that it merged */
   ast_stream_topology_free(t0);
   ast_test_validate_cleanup(test, (t0 = ast_stream_topology_alloc()), res, done);
   topology_append_stream(t0, "video", AST_MEDIA_TYPE_VIDEO, res, done);
   topology_append_stream(t0, "audio", AST_MEDIA_TYPE_AUDIO, res, done);
   topology_append_stream(t0, "audio", AST_MEDIA_TYPE_AUDIO, res, done);

   ast_stream_topology_map(t0, &types, &v0, &v1);
   ast_test_validate_cleanup(test, AST_VECTOR_SIZE(&types) == 3, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&types, 0) == AST_MEDIA_TYPE_AUDIO, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&types, 1) == AST_MEDIA_TYPE_VIDEO, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&types, 2) == AST_MEDIA_TYPE_AUDIO, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&v0, 0) == 1, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&v0, 1) == 0, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&v0, 2) == 2, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&v1, 0) == 1, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&v1, 1) == 0, res, done);
   ast_test_validate_cleanup(test, AST_VECTOR_GET(&v1, 2) == 2, res, done);

done:
   AST_VECTOR_FREE(&v1);
   AST_VECTOR_FREE(&v0);
   AST_VECTOR_FREE(&types);

   return res;
}

static int unload_module(void)
{
   AST_TEST_UNREGISTER(stream_create);
   AST_TEST_UNREGISTER(stream_create_no_name);
   AST_TEST_UNREGISTER(stream_set_type);
   AST_TEST_UNREGISTER(stream_set_formats);
   AST_TEST_UNREGISTER(stream_set_state);
   AST_TEST_UNREGISTER(stream_metadata);
   AST_TEST_UNREGISTER(stream_topology_create);
   AST_TEST_UNREGISTER(stream_topology_clone);
   AST_TEST_UNREGISTER(stream_topology_clone);
   AST_TEST_UNREGISTER(stream_topology_append_stream);
   AST_TEST_UNREGISTER(stream_topology_set_stream);
   AST_TEST_UNREGISTER(stream_topology_del_stream);
   AST_TEST_UNREGISTER(stream_topology_create_from_format_cap);
   AST_TEST_UNREGISTER(stream_topology_get_first_stream_by_type);
   AST_TEST_UNREGISTER(stream_topology_create_from_channel_nativeformats);
   AST_TEST_UNREGISTER(stream_topology_channel_set);
   AST_TEST_UNREGISTER(stream_write_non_multistream);
   AST_TEST_UNREGISTER(stream_write_multistream);
   AST_TEST_UNREGISTER(stream_read_non_multistream);
   AST_TEST_UNREGISTER(stream_read_multistream);
   AST_TEST_UNREGISTER(stream_topology_change_request_from_application_non_multistream);
   AST_TEST_UNREGISTER(stream_topology_change_request_from_channel_non_multistream);
   AST_TEST_UNREGISTER(stream_topology_change_request_from_application);
   AST_TEST_UNREGISTER(stream_topology_change_request_from_channel);
   AST_TEST_UNREGISTER(format_cap_from_stream_topology);
   AST_TEST_UNREGISTER(stream_topology_map_create);
   return 0;
}

static int load_module(void)
{
   AST_TEST_REGISTER(stream_create);
   AST_TEST_REGISTER(stream_create_no_name);
   AST_TEST_REGISTER(stream_set_type);
   AST_TEST_REGISTER(stream_set_formats);
   AST_TEST_REGISTER(stream_set_state);
   AST_TEST_REGISTER(stream_metadata);
   AST_TEST_REGISTER(stream_topology_create);
   AST_TEST_REGISTER(stream_topology_clone);
   AST_TEST_REGISTER(stream_topology_append_stream);
   AST_TEST_REGISTER(stream_topology_set_stream);
   AST_TEST_REGISTER(stream_topology_del_stream);
   AST_TEST_REGISTER(stream_topology_create_from_format_cap);
   AST_TEST_REGISTER(stream_topology_get_first_stream_by_type);
   AST_TEST_REGISTER(stream_topology_create_from_channel_nativeformats);
   AST_TEST_REGISTER(stream_topology_channel_set);
   AST_TEST_REGISTER(stream_write_non_multistream);
   AST_TEST_REGISTER(stream_write_multistream);
   AST_TEST_REGISTER(stream_read_non_multistream);
   AST_TEST_REGISTER(stream_read_multistream);
   AST_TEST_REGISTER(stream_topology_change_request_from_application_non_multistream);
   AST_TEST_REGISTER(stream_topology_change_request_from_channel_non_multistream);
   AST_TEST_REGISTER(stream_topology_change_request_from_application);
   AST_TEST_REGISTER(stream_topology_change_request_from_channel);
   AST_TEST_REGISTER(format_cap_from_stream_topology);
   AST_TEST_REGISTER(stream_topology_map_create);
   return AST_MODULE_LOAD_SUCCESS;
}

AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Media Stream API test module");