utils/cec-compliance/cec-test-audio.cpp

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright 2016 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
 */

#include <ctime>
#include <sstream>
#include <string>

#include <sys/ioctl.h>
#include <unistd.h>

#include "cec-compliance.h"
#include "compiler.h"

static std::string audio_format_code2s(__u8 format_code)
{
	switch (format_code) {
	case 0:
		return "Reserved";
	case SAD_FMT_CODE_LPCM:
		return "L-PCM";
	case SAD_FMT_CODE_AC3:
		return "AC-3";
	case SAD_FMT_CODE_MPEG1:
		return "MPEG-1";
	case SAD_FMT_CODE_MP3:
		return "MP3";
	case SAD_FMT_CODE_MPEG2:
		return "MPEG2";
	case SAD_FMT_CODE_AAC_LC:
		return "AAC LC";
	case SAD_FMT_CODE_DTS:
		return "DTS";
	case SAD_FMT_CODE_ATRAC:
		return "ATRAC";
	case SAD_FMT_CODE_ONE_BIT_AUDIO:
		return "One Bit Audio";
	case SAD_FMT_CODE_ENHANCED_AC3:
		return "Enhanced AC-3";
	case SAD_FMT_CODE_DTS_HD:
		return "DTS-HD";
	case SAD_FMT_CODE_MAT:
		return "MAT";
	case SAD_FMT_CODE_DST:
		return "DST";
	case SAD_FMT_CODE_WMA_PRO:
		return "WMA Pro";
	case SAD_FMT_CODE_EXTENDED:
		return "Extended";
	default:
		return "Illegal";
	}
}

static std::string extension_type_code2s(__u8 type_code)
{
	switch (type_code) {
	case 0:
	case 1:
	case 2:
	case 3:
		return "Not in use";
	case SAD_EXT_TYPE_MPEG4_HE_AAC:
		return "MPEG-4 HE AAC";
	case SAD_EXT_TYPE_MPEG4_HE_AACv2:
		return "MPEG-4 HE AAC v2";
	case SAD_EXT_TYPE_MPEG4_AAC_LC:
		return "MPEG-4 AAC LC";
	case SAD_EXT_TYPE_DRA:
		return "DRA";
	case SAD_EXT_TYPE_MPEG4_HE_AAC_SURROUND:
		return "MPEG-4 HE AAC + MPEG Surround";
	case SAD_EXT_TYPE_MPEG4_AAC_LC_SURROUND:
		return "MPEG-4 AAC LC + MPEG Surround";
	case SAD_EXT_TYPE_MPEG_H_3D_AUDIO:
		return "MPEG-H 3D Audio";
	case SAD_EXT_TYPE_AC_4:
		return "AC-4";
	case SAD_EXT_TYPE_LPCM_3D_AUDIO:
		return "L-PCM 3D Audio";
	default:
		return "Reserved";
	}
}

static std::string short_audio_desc2s(const struct short_audio_desc &sad)
{
	std::stringstream oss;

	if (sad.format_code != SAD_FMT_CODE_EXTENDED)
		oss << audio_format_code2s(sad.format_code);
	else
		oss << extension_type_code2s(sad.extension_type_code);
	oss << ", " << static_cast<int>(sad.num_channels) << " channels";

	oss << ", sampling rates (kHz): ";
	if (sad.sample_freq_mask & SAD_SAMPLE_FREQ_MASK_32)
		oss << "32,";
	if (sad.sample_freq_mask & SAD_SAMPLE_FREQ_MASK_44_1)
		oss << "44.1,";
	if (sad.sample_freq_mask & SAD_SAMPLE_FREQ_MASK_48)
		oss << "48,";
	if (sad.sample_freq_mask & SAD_SAMPLE_FREQ_MASK_88_2)
		oss << "88.2,";
	if (sad.sample_freq_mask & SAD_SAMPLE_FREQ_MASK_96)
		oss << "96,";
	if (sad.sample_freq_mask & SAD_SAMPLE_FREQ_MASK_176_4)
		oss << "176.4,";
	if (sad.sample_freq_mask & SAD_SAMPLE_FREQ_MASK_192)
		oss << "192,";
	if (sad.sample_freq_mask & (1 << 7))
		oss << "Reserved,";
	oss << "\b \b";

	if (sad.format_code == SAD_FMT_CODE_LPCM ||
	    (sad.format_code == SAD_FMT_CODE_EXTENDED &&
	     sad.extension_type_code == SAD_EXT_TYPE_LPCM_3D_AUDIO)) {
		oss << ", bit depth: ";
		if (sad.bit_depth_mask & SAD_BIT_DEPTH_MASK_16)
			oss << "16,";
		if (sad.bit_depth_mask & SAD_BIT_DEPTH_MASK_20)
			oss << "20,";
		if (sad.bit_depth_mask & SAD_BIT_DEPTH_MASK_24)
			oss << "24,";
		oss << "\b \b";
	} else if (sad.format_code >= 2 && sad.format_code <= 8)
		oss << " max bitrate (kbit/s): " << 8 * sad.max_bitrate;

	if (sad.format_code == SAD_FMT_CODE_EXTENDED) {
		switch (sad.extension_type_code) {
		case 4:
		case 5:
		case 6:
		case 8:
		case 10:
			oss << ", frame length: ";
			if (sad.frame_length_mask & SAD_FRAME_LENGTH_MASK_960)
				oss << "960,";
			if (sad.frame_length_mask & SAD_FRAME_LENGTH_MASK_1024)
				oss << "1024,";
			oss << "\b";
			break;
		}

		if (sad.extension_type_code == 8 || sad.extension_type_code == 10)
			oss << ", MPS";
	}

	return oss.str();
}

static void sad_decode(struct short_audio_desc *sad, __u32 descriptor)
{
	__u8 b1 = (descriptor >> 16) & 0xff;
	__u8 b2 = (descriptor >> 8) & 0xff;
	__u8 b3 = descriptor & 0xff;

	sad->num_channels = (b1 & 0x07) + 1;
	sad->format_code = (b1 >> 3) & 0x0f;
	sad->sample_freq_mask = b2;

	switch (sad->format_code) {
	case SAD_FMT_CODE_LPCM:
		sad->bit_depth_mask = b3 & 0x07;
		break;
	case 2:
	case 3:
	case 4:
	case 5:
	case 6:
	case 7:
	case 8:
		sad->max_bitrate = b3;
		break;
	case 9:
	case 10:
	case 11:
	case 12:
	case 13:
		sad->format_dependent = b3;
		break;
	case SAD_FMT_CODE_WMA_PRO:
		sad->wma_profile = b3 & 0x03;
		break;
	case SAD_FMT_CODE_EXTENDED:
	        sad->extension_type_code = (b3 >> 3) & 0x1f;

		switch (sad->extension_type_code) {
		case 4:
		case 5:
		case 6:
			sad->frame_length_mask = (b3 >> 1) & 0x03;
			break;
		case 8:
		case 10:
			sad->frame_length_mask = (b3 >> 1) & 0x03;
			sad->mps = b3 & 1;
			break;
		case SAD_EXT_TYPE_MPEG_H_3D_AUDIO:
		case SAD_EXT_TYPE_AC_4:
			sad->format_dependent = b3 & 0x07;
			fallthrough;
		case SAD_EXT_TYPE_LPCM_3D_AUDIO:
			sad->bit_depth_mask = b3 & 0x07;
			break;
		}
		break;
	}
}

/* Dynamic Auto Lipsync */

static int dal_request_current_latency(struct node *node, unsigned me, unsigned la, bool interactive)
{
	struct cec_msg msg;

	cec_msg_init(&msg, me, la);
	cec_msg_request_current_latency(&msg, true, node->remote[la].phys_addr);
	fail_on_test(!transmit_timeout(node, &msg));
	fail_on_test_v2(node->remote[la].cec_version,
			timed_out(&msg) && is_tv(la, node->remote[la].prim_type));
	if (timed_out(&msg))
		return OK_NOT_SUPPORTED;

	/* When the device supports Dynamic Auto Lipsync but does not implement
	   CEC 1.4b, or 2.0, a very strict subset of CEC can be supported. If we
	   get here and the version is < 1.4, we know that the device is not
	   complying to this specification. */
	if (node->remote[la].cec_version < CEC_OP_CEC_VERSION_1_4) {
		warn("CEC 2.0 specifies that devices with CEC version < 1.4 which implement\n");
		warn("Dynamic Auto Lipsync shall only implement a very strict subset of CEC.\n");
	}

	__u16 phys_addr;
	__u8 video_latency, low_latency_mode, audio_out_compensated, audio_out_delay;

	cec_ops_report_current_latency(&msg, &phys_addr, &video_latency, &low_latency_mode,
				       &audio_out_compensated, &audio_out_delay);
	// cec_ops_report_current_latency will hardcode audio_out_delay
	// if it is unused, but for this test we want the real value, so
	// get it from the actual message.
	if (msg.len >= 7)
		audio_out_delay = msg.msg[6];
	else
		audio_out_delay = 1;
	fail_on_test(phys_addr != node->remote[la].phys_addr);
	info("Video latency: %d (%dms)\n", video_latency, (video_latency - 1) * 2);
	info("Low latency mode: %d\n", low_latency_mode);
	info("Audio output compensation: %d\n", audio_out_compensated);
	if (audio_out_compensated == CEC_OP_AUD_OUT_COMPENSATED_PARTIAL_DELAY) {
		info("Audio out delay: %d (%dms)\n", audio_out_delay, (audio_out_delay - 1) * 2);
		fail_on_test(audio_out_delay == 0 || audio_out_delay > 251);
		// Warn if the delay is more than 50 ms
		warn_on_test(audio_out_delay > (50 / 2) + 1);
	} else {
		// Although this value will be ignored, it shouldn't use
		// reserved values.
		if (audio_out_delay == 0 || audio_out_delay > 251)
			warn("Audio out delay is set to a reserved value (%d), set it to 1 instead (recommended value when this field is unused).\n", audio_out_delay);
		else if (audio_out_delay != 1)
			warn("Audio out delay is %d (%dms), but value 1 is recommended when this field is unused.\n",
			     audio_out_delay, (audio_out_delay - 1) * 2);
	}
	fail_on_test(video_latency == 0 || video_latency > 251);
	// Warn if the delay is more than 50 ms and low latency mode is set
	if (video_latency > (50 / 2) + 1) {
		if (low_latency_mode)
			fail("Low latency mode is set, but video latency is > 50ms\n");
		else
			warn("Video latency is > 50ms\n");
	}

	return 0;
}

static int dal_req_current_latency_invalid(struct node *node, unsigned me, unsigned la, bool interactive)
{
	struct cec_msg msg;

	/* Test that there is no reply when the physical address operand is not the
	   physical address of the remote device. */
	cec_msg_init(&msg, me, la);
	cec_msg_request_current_latency(&msg, true, CEC_PHYS_ADDR_INVALID);
	fail_on_test(!transmit_timeout(node, &msg));
	fail_on_test(!timed_out(&msg));

	return 0;
}

const vec_remote_subtests dal_subtests{
	{ "Request Current Latency", CEC_LOG_ADDR_MASK_ALL, dal_request_current_latency },
	{ "Request Current Latency with invalid PA", CEC_LOG_ADDR_MASK_ALL, dal_req_current_latency_invalid },
};

/* Audio Return Channel Control */

static __u16 pa_common_mask(__u16 pa1, __u16 pa2)
{
	__u16 mask = 0xf000;

	for (int i = 0; i < 3; i++) {
		if ((pa1 & mask) != (pa2 & mask))
			break;
		mask = (mask >> 4) | 0xf000;
	}
	return mask << 4;
}
static bool pa_are_adjacent(__u16 pa1, __u16 pa2)
{
	const __u16 mask = pa_common_mask(pa1, pa2);
	const __u16 trail_mask = ((~mask) & 0xffff) >> 4;

	if (pa1 == CEC_PHYS_ADDR_INVALID || pa2 == CEC_PHYS_ADDR_INVALID || pa1 == pa2)
		return false;
	if ((pa1 & trail_mask) || (pa2 & trail_mask))
		return false;
	return !((pa1 & ~mask) && (pa2 & ~mask));
}

static bool pa_is_upstream_from(__u16 pa1, __u16 pa2)
{
	const __u16 mask = pa_common_mask(pa1, pa2);

	if (pa1 == CEC_PHYS_ADDR_INVALID || pa2 == CEC_PHYS_ADDR_INVALID)
		return false;
	return !(pa1 & ~mask) && (pa2 & ~mask);
}

static int arc_initiate_tx(struct node *node, unsigned me, unsigned la, bool interactive)
{
	/* Check if we are upstream from the device. If we are, then the device is
	   an HDMI source, which means that it is an ARC receiver, not a transmitter. */
	if (pa_is_upstream_from(node->phys_addr, node->remote[la].phys_addr))
		return NOTAPPLICABLE;

	struct cec_msg msg;

	/*
	 * Note that this is a special case: INITIATE_ARC can reply with two possible
	 * messages: CEC_MSG_REPORT_ARC_INITIATED or CEC_MSG_REPORT_ARC_TERMINATED.
	 * It's the only message that behaves like this.
	 */
	cec_msg_init(&msg, me, la);
	cec_msg_initiate_arc(&msg, true);
	fail_on_test(!transmit_timeout(node, &msg));
	if (timed_out(&msg)) {
		fail_on_test_v2(node->remote[la].cec_version, node->remote[la].sink_has_arc_tx);
		warn("Timed out waiting for Report ARC Initiated/Terminated.\n");
		return OK_PRESUMED;
	}
	if (unrecognized_op(&msg)) {
		fail_on_test_v2(node->remote[la].cec_version, node->remote[la].sink_has_arc_tx);
		return OK_NOT_SUPPORTED;
	}
	if (cec_msg_opcode(&msg) == CEC_MSG_REPORT_ARC_INITIATED) {
		fail_on_test(!pa_are_adjacent(node->phys_addr, node->remote[la].phys_addr));
		fail_on_test_v2(node->remote[la].cec_version, !node->remote[la].sink_has_arc_tx);
		node->remote[la].arc_initiated = true;
	}
	else if (cec_msg_opcode(&msg) == CEC_MSG_REPORT_ARC_TERMINATED)
		announce("Device supports ARC but is not ready to initiate.");
	else if (refused(&msg))
		return OK_REFUSED;
	else if (cec_msg_status_is_abort(&msg))
		return OK_PRESUMED;

	return 0;
}

static int arc_terminate_tx(struct node *node, unsigned me, unsigned la, bool interactive)
{
	/* Check if we are upstream from the device. If we are, then the device is
	   an HDMI source, which means that it is an ARC receiver, not a transmitter. */
	if (pa_is_upstream_from(node->phys_addr, node->remote[la].phys_addr))
		return NOTAPPLICABLE;
	if (!node->remote[la].arc_initiated)
		return NOTAPPLICABLE;

	struct cec_msg msg;

	cec_msg_init(&msg, me, la);
	cec_msg_terminate_arc(&msg, true);
	fail_on_test(!transmit_timeout(node, &msg));
	if (timed_out(&msg)) {
		warn("Timed out waiting for Report ARC Terminated.\n");
		return OK_PRESUMED;
	}
	fail_on_test(unrecognized_op(&msg));
	if (cec_msg_status_is_abort(&msg)) {
		warn("Received Feature Abort for Terminate ARC (but the message was recognized).\n");
		if (refused(&msg))
			return OK_REFUSED;
		return OK_PRESUMED;
	}

	return 0;
}

static int arc_initiate_rx(struct node *node, unsigned me, unsigned la, bool interactive)
{
	/* Check if the DUT is upstream from us. If it is, then it is an
	   HDMI sink, which means that it is an ARC transmitter, not receiver. */
	if (pa_is_upstream_from(node->remote[la].phys_addr, node->phys_addr))
		return NOTAPPLICABLE;

	struct cec_msg msg;

	cec_msg_init(&msg, me, la);
	cec_msg_request_arc_initiation(&msg, true);

	bool unsupported = false;

	fail_on_test(!transmit_timeout(node, &msg));
	if (timed_out(&msg) || unrecognized_op(&msg))
		unsupported = true;
	else if (cec_msg_status_is_abort(&msg)) {
		__u8 abort_msg, reason;

		cec_ops_feature_abort(&msg, &abort_msg, &reason);
		if (reason == CEC_OP_ABORT_INCORRECT_MODE) {
			announce("The device supports ARC but is not ready to initiate.");
			return 0;
		}

		warn("Device responded Feature Abort with unexpected abort reason. Assuming no ARC support.\n");
		unsupported = true;
	}

	if (unsupported) {
		fail_on_test_v2(node->remote[la].cec_version, node->remote[la].source_has_arc_rx);
		return OK_NOT_SUPPORTED;
	}
	fail_on_test(!pa_are_adjacent(node->phys_addr, node->remote[la].phys_addr));
	fail_on_test_v2(node->remote[la].cec_version, !node->remote[la].source_has_arc_rx);

	cec_msg_init(&msg, me, la);
	cec_msg_report_arc_initiated(&msg);
	fail_on_test(!transmit_timeout(node, &msg));
	fail_on_test(unrecognized_op(&msg));
	node->remote[la].arc_initiated = true;

	return 0;
}

static int arc_terminate_rx(struct node *node, unsigned me, unsigned la, bool interactive)
{
	/* Check if the DUT is upstream from us. If it is, then it is an
	   HDMI sink, which means that it is an ARC transmitter, not receiver. */
	if (pa_is_upstream_from(node->remote[la].phys_addr, node->phys_addr))
		return NOTAPPLICABLE;
	if (!node->remote[la].arc_initiated)
		return NOTAPPLICABLE;

	struct cec_msg msg;

	cec_msg_init(&msg, me, la);
	cec_msg_request_arc_termination(&msg, true);
	fail_on_test(!transmit_timeout(node, &msg));
	if (timed_out(&msg)) {
		warn("Timed out waiting for Terminate ARC.\n");
		return OK_PRESUMED;
	}
	fail_on_test(unrecognized_op(&msg));
	if (cec_msg_status_is_abort(&msg)) {
		warn("Received Feature Abort for Request ARC Termination (but the message was recognized).\n");
		if (refused(&msg))
			return OK_REFUSED;
		return OK_PRESUMED;
	}

	cec_msg_init(&msg, me, la);
	cec_msg_report_arc_terminated(&msg);
	fail_on_test(!transmit_timeout(node, &msg));
	fail_on_test(unrecognized_op(&msg));

	return 0;
}

const vec_remote_subtests arc_subtests{
	{ "Initiate ARC (RX)", CEC_LOG_ADDR_MASK_ALL, arc_initiate_rx },
	{ "Terminate ARC (RX)", CEC_LOG_ADDR_MASK_ALL, arc_terminate_rx },
	{ "Initiate ARC (TX)", CEC_LOG_ADDR_MASK_ALL, arc_initiate_tx },
	{ "Terminate ARC (TX)", CEC_LOG_ADDR_MASK_ALL, arc_terminate_tx },
};

/* System Audio Control */

/*
 * The following scenarios are defined in section 13.15 of the CEC 1.4
 * specification.
 *
 * These are not tested as they need three CEC devices.  An amplifier
 * provides the audio for a source that is being displayed on a TV.
 *
 * 1.  Amplifier initiated <System Audio Mode Request> and active source
 *     discovery with a <Request Active Source> broadcast plus the
 *     <Active Source> response.
 * 2.  Post discovery, subsequent amplifier <Set System Audio Mode> [On]
 *     and System Audio Control feature confirmation with TV.
 * 3.  Amplifier broadcasts <Set System Audio Mode> [On] to mute the TV and
 *     unmute amplifier.
 * 4.  Amplifier broadcasts <Set System Audio Mode> [Off] to unmute the TV
 *     and mute the amplifier.
 * 5.  When System Audio Mode is On, muting and unmuting an amplifier sends
 *     a <Report Audio Status> message to the TV.
 * 6.  When System Audio Mode is On, the amplifier sends a <Set System Audio
 *     Mode> [Off] to unmute the TV before going into standby.
 * 7.  When System Audio Mode is On, only the amplifier can control system
 *     volume.
 *
 * These are not tested as they are hard-to-test corner cases.
 *
 * 1.  Optional features in subsection 13.15.4 of version 1.4.
 *
 * These are not tested as they deal with 1.3a or older versions and is not
 * worth spending time on.
 *
 * 1.  <Request Audio Descriptor> message is from version 1.4 so older versions
 *     report <Feature Abort>.
 * 2.  <Report Audio Descriptor> message is from version 1.4 so older versions
 *     report <Feature Abort>.
 * 3.  System Audio Control is from version 1.3a so older versions report
 *     <Feature Abort>.
 */

static int sac_request_sad_probe(struct node *node, unsigned me, unsigned la, bool interactive)
{
	struct cec_msg msg;
	__u8 audio_format_id = 0;
	__u8 audio_format_code = 1;

	cec_msg_init(&msg, me, la);
	cec_msg_request_short_audio_descriptor(&msg, true, 1, &audio_format_id, &audio_format_code);
	fail_on_test(!transmit_timeout(node, &msg));
	fail_on_test(timed_out(&msg));
	if (unrecognized_op(&msg))
		return OK_NOT_SUPPORTED;
	if (refused(&msg))
		return OK_REFUSED;
	if (cec_msg_status_is_abort(&msg))
		return OK_PRESUMED;
	node->remote[la].has_sad = true;

	return 0;
}

static int sac_request_sad_invalid(struct node *node, unsigned me, unsigned la, bool interactive)
{
	if (!node->remote[la].has_sad)
		return NOTAPPLICABLE;

	struct cec_msg msg;
	__u8 audio_format_id = CEC_OP_AUD_FMT_ID_CEA861;
	__u8 audio_format_code = 63; // This is outside the range of CEA861-F

	cec_msg_init(&msg, me, la);
	cec_msg_request_short_audio_descriptor(&msg, true, 1, &audio_format_id, &audio_format_code);
	fail_on_test(!transmit_timeout(node, &msg));
	fail_on_test(timed_out(&msg));
	fail_on_test(!cec_msg_status_is_abort(&msg));
	if (abort_reason(&msg) != CEC_OP_ABORT_INVALID_OP) {
		warn("Expected Feature Abort [Invalid operand] in reply to Request Short\n");
		warn("Audio Descriptor with invalid audio format as operand.\n");
	}

	return 0;
}

static int sac_sad_format_check(struct node *node, unsigned me, unsigned la, bool interactive)
{
	if (!node->remote[la].has_sad)
		return NOTAPPLICABLE;

	struct cec_msg msg;
	__u8 audio_format_id;
	__u8 audio_format_code;

	for (unsigned int id = 0; id <= 1; id++) {
		audio_format_id = id;
		for (unsigned int fmt_code = 1; fmt_code <= 14; fmt_code++) {
			audio_format_code = fmt_code;

			cec_msg_init(&msg, me, la);
			cec_msg_request_short_audio_descriptor(&msg, true, 1, &audio_format_id, &audio_format_code);
			fail_on_test(!transmit_timeout(node, &msg));
			fail_on_test(timed_out(&msg));
			fail_on_test(unrecognized_op(&msg) || refused(&msg));

			if (cec_msg_status_is_abort(&msg) &&
			    abort_reason(&msg) == CEC_OP_ABORT_INVALID_OP)
				continue;

			__u8 num_descriptors;
			__u32 descriptors[4] = {};

			cec_ops_report_short_audio_descriptor(&msg, &num_descriptors, descriptors);
			fail_on_test(num_descriptors == 0);
			if (id == 1 && node->remote[la].cec_version < CEC_OP_CEC_VERSION_2_0)
				warn("The device has CEC version < 2.0 but reports audio format(s) introduced in CEC 2.0.\n");

			for (int j = 0; j < num_descriptors; j++) {
				struct short_audio_desc sad = {};

				sad_decode(&sad, descriptors[j]);
				if ((id == 0 && sad.format_code != fmt_code) ||
				    (id == 1 && sad.extension_type_code != fmt_code))
					return fail("Different audio format code reported than requested.\n");
				info("Supports format %s\n", short_audio_desc2s(sad).c_str());

				/* We need to store the ID and Code for one of the audio formats found,
				   for use in later test(s) */
				node->remote[la].supp_format_id = audio_format_id;
				node->remote[la].supp_format_code = audio_format_code;
			}
		}
	}

	return 0;
}

static int sac_sad_req_multiple(struct node *node, unsigned me, unsigned la, bool interactive)
{
	if (!node->remote[la].has_sad || node->remote[la].supp_format_code == 0)
		return NOTAPPLICABLE;

	/* Check that if we got a response to a Request Short Audio Descriptor
	   with a single format, we also get a response when the same audio format
	   occurs in a request together with other formats. */
	struct cec_msg msg;
	__u8 audio_format_id[4] = { };
	__u8 audio_format_code[4];

	for (int i = 0; i < 4; i++) {
		if (node->remote[la].supp_format_code <= 12)
			audio_format_code[i] = node->remote[la].supp_format_code - 1 + i;
		else
			audio_format_code[i] = node->remote[la].supp_format_code - 1 - i;
	}
	cec_msg_init(&msg, me, la);
	cec_msg_request_short_audio_descriptor(&msg, true, 4, audio_format_id, audio_format_code);
	fail_on_test(!transmit_timeout(node, &msg));
	fail_on_test(timed_out(&msg));
	fail_on_test(cec_msg_status_is_abort(&msg));

	return 0;
}

static int sac_set_system_audio_mode_direct(struct node *node, unsigned me, unsigned la, bool interactive)
{
	struct cec_msg msg;

	cec_msg_init(&msg, me, la);
	cec_msg_set_system_audio_mode(&msg, CEC_OP_SYS_AUD_STATUS_ON);
	fail_on_test(!transmit_timeout(node, &msg));
	fail_on_test_v2(node->remote[la].cec_version,
			unrecognized_op(&msg) && is_tv(la, node->remote[la].prim_type));
	if (unrecognized_op(&msg))
		return OK_NOT_SUPPORTED;
	if (refused(&msg))
		return OK_REFUSED;
	node->remote[la].has_set_sys_audio_mode = true;

	return OK_PRESUMED;
}

static int sac_set_system_audio_mode_broadcast_on(struct node *node, unsigned me, unsigned la, bool interactive)
{
	struct cec_msg msg;

	cec_msg_init(&msg, me, CEC_LOG_ADDR_BROADCAST);
	cec_msg_set_system_audio_mode(&msg, CEC_OP_SYS_AUD_STATUS_ON);
	fail_on_test(!transmit_timeout(node, &msg));

	return OK_PRESUMED;
}

static int sac_system_audio_mode_status(struct node *node, unsigned me, unsigned la, bool interactive)
{
	struct cec_msg msg;

	/* The device shall not feature abort System Audio Status if it did not
	   feature abort Set System Audio Mode.

	   The message is mandatory for TVs in CEC 2.0. */
	cec_msg_init(&msg, me, la);
	cec_msg_system_audio_mode_status(&msg, CEC_OP_SYS_AUD_STATUS_ON);
	fail_on_test(!transmit_timeout(node, &msg));
	fail_on_test_v2(node->remote[la].cec_version,
			is_tv(la, node->remote[la].prim_type) && unrecognized_op(&msg));
	if (unrecognized_op(&msg) && !node->remote[la].has_set_sys_audio_mode)
		return OK_NOT_SUPPORTED;
	fail_on_test(unrecognized_op(&msg));
	if (refused(&msg))
		return OK_REFUSED;
	if (cec_msg_status_is_abort(&msg))
		return OK_PRESUMED;

	return 0;
}

static int sac_set_system_audio_mode_broadcast_off(struct node *node, unsigned me, unsigned la, bool interactive)
{
	struct cec_msg msg;

	cec_msg_init(&msg, me, CEC_LOG_ADDR_BROADCAST);
	cec_msg_set_system_audio_mode(&msg, CEC_OP_SYS_AUD_STATUS_OFF);
	fail_on_test(!transmit_timeout(node, &msg));

	return OK_PRESUMED;
}

static int sac_system_audio_mode_req_on(struct node *node, unsigned me, unsigned la, bool interactive)
{
	struct cec_msg msg;
	__u8 status;

	/* Send a System Audio Mode Request to the audio system. This notifies the
	   audio system that our device has SAC capabilities, so it should enable
	   the feature right away by sending Set System Audio Mode with On as status.

	   The message is mandatory for audio systems in CEC 2.0. */
	cec_msg_init(&msg, me, la);
	cec_msg_system_audio_mode_request(&msg, true, node->phys_addr);
	fail_on_test(!transmit_timeout(node, &msg));
	fail_on_test(timed_out(&msg));
	fail_on_test_v2(node->remote[la].cec_version,
			cec_has_audiosystem(1 << la) && unrecognized_op(&msg));
	if (unrecognized_op(&msg))
		return OK_NOT_SUPPORTED;
	if (refused(&msg))
		return OK_REFUSED;
	if (cec_msg_status_is_abort(&msg))
		return OK_PRESUMED;
	node->remote[la].has_sys_audio_mode_req = true;
	cec_ops_set_system_audio_mode(&msg, &status);
	fail_on_test(status != CEC_OP_SYS_AUD_STATUS_ON);

	return 0;
}

static int sac_give_system_audio_mode_status(struct node *node, unsigned me, unsigned la, bool interactive)
{
	struct cec_msg msg;
	__u8 system_audio_status;

	/* The device shall not feature abort Give System Audio Mode Status if it did not
	   feature abort System Audio Mode Request.

	   The message is mandatory for audio systems in CEC 2.0. */
	cec_msg_init(&msg, me, la);
	cec_msg_give_system_audio_mode_status(&msg, true);
	fail_on_test(!transmit_timeout(node, &msg));
	fail_on_test(timed_out(&msg));
	fail_on_test_v2(node->remote[la].cec_version,
			cec_has_audiosystem(1 << la) && unrecognized_op(&msg));
	if (unrecognized_op(&msg) && !node->remote[la].has_sys_audio_mode_req)
		return OK_NOT_SUPPORTED;
	fail_on_test(unrecognized_op(&msg));
	if (refused(&msg))
		return OK_REFUSED;
	if (cec_msg_status_is_abort(&msg))
		return OK_PRESUMED;
	cec_ops_system_audio_mode_status(&msg, &system_audio_status);
	fail_on_test(system_audio_status != CEC_OP_SYS_AUD_STATUS_ON);

	return 0;
}

static int sac_give_audio_status(struct node *node, unsigned me, unsigned la, bool interactive)
{
	struct cec_msg msg;

	/* Give Audio Status is mandatory for audio systems in CEC 2.0, except
	   for systems that lack external controls for volume/mute status. */
	cec_msg_init(&msg, me, la);
	cec_msg_give_audio_status(&msg, true);
	fail_on_test(!transmit_timeout(node, &msg));
	fail_on_test(timed_out(&msg));
	fail_on_test_v2(node->remote[la].cec_version,
			cec_has_audiosystem(1 << la) && unrecognized_op(&msg));
	if (unrecognized_op(&msg))
		return OK_NOT_SUPPORTED;
	if (refused(&msg))
		return OK_REFUSED;
	if (cec_msg_status_is_abort(&msg))
		return OK_PRESUMED;

	cec_ops_report_audio_status(&msg, &node->remote[la].mute, &node->remote[la].volume);
	fail_on_test(node->remote[la].volume > 100);
	info("Volume: %d %s\n", node->remote[la].volume, node->remote[la].mute ? "(muted)" : "");

	return 0;
}

static int sac_util_send_user_control_press(struct node *node, unsigned me, unsigned la, __u8 ui_cmd)
{
	struct cec_msg msg;
	struct cec_op_ui_command rc_press = {};

	/* The device shall not feature abort
	     - User Control Pressed ["Volume Up"]
	     - User Control Pressed ["Volume Down"]
	     - User Control Pressed ["Mute"]
	   if it did not feature abort System Audio Mode Request.

	   The messages are mandatory for audio systems and TVs in CEC 2.0,
	   and it is mandatory for audio systems to send Report Audio Status
	   back to the TV in CEC 2.0.

	   It is recommended for devices to not send Report Audio Status back
	   more often than once every 500ms. We therefore sleep a second before
	   each User Control Pressed is sent. */
	bool got_response;

	sleep(1);
	mode_set_follower(node);
	cec_msg_init(&msg, me, la);
	rc_press.ui_cmd = ui_cmd;
	cec_msg_user_control_pressed(&msg, &rc_press);
	fail_on_test(!transmit(node, &msg));
	cec_msg_init(&msg, me, la);
	cec_msg_user_control_released(&msg);
	fail_on_test(!transmit_timeout(node, &msg));
	got_response = util_receive(node, la, 1000, &msg,
				    CEC_MSG_USER_CONTROL_PRESSED, CEC_MSG_REPORT_AUDIO_STATUS) >= 0;

	fail_on_test_v2(node->remote[la].cec_version, !got_response &&
			cec_has_audiosystem(1 << la));
	fail_on_test_v2(node->remote[la].cec_version, unrecognized_op(&msg) &&
			(is_tv(la, node->remote[la].prim_type) || cec_has_audiosystem(1 << la)));
	if (unrecognized_op(&msg) && !node->remote[la].has_sys_audio_mode_req)
		return OK_NOT_SUPPORTED;
	fail_on_test(unrecognized_op(&msg));
	if (refused(&msg))
		return OK_REFUSED;
	if (cec_msg_status_is_abort(&msg))
		return OK_PRESUMED;
	if (got_response) {
		cec_ops_report_audio_status(&msg, &node->remote[la].mute, &node->remote[la].volume);
		return 0;
	}

	return OK_PRESUMED;
}

static int sac_user_control_press_vol_up(struct node *node, unsigned me, unsigned la, bool interactive)
{
	__u8 ret, old_volume = node->remote[la].volume;

	if ((ret = sac_util_send_user_control_press(node, me, la, 0x41)))
		return ret;
	/* Check that if not already at the highest, the volume was increased. */
	fail_on_test_v2(node->remote[la].cec_version,
			la == CEC_LOG_ADDR_AUDIOSYSTEM &&
			old_volume < 100 && node->remote[la].volume <= old_volume);

	return 0;
}

static int sac_user_control_press_vol_down(struct node *node, unsigned me, unsigned la, bool interactive)
{
	__u8 ret, old_volume = node->remote[la].volume;

	if ((ret = sac_util_send_user_control_press(node, me, la, 0x42)))
		return ret;
	/* Check that if not already at the lowest, the volume was lowered. */
	fail_on_test_v2(node->remote[la].cec_version,
			la == CEC_LOG_ADDR_AUDIOSYSTEM &&
			old_volume > 0 && node->remote[la].volume >= old_volume);

	return 0;
}

static int sac_user_control_press_mute(struct node *node, unsigned me, unsigned la, bool interactive)
{
	__u8 ret, old_mute = node->remote[la].mute;

	if ((ret = sac_util_send_user_control_press(node, me, la, 0x43)))
		return ret;
	/* Check that mute has been toggled from what it was before. */
	fail_on_test_v2(node->remote[la].cec_version,
			la == CEC_LOG_ADDR_AUDIOSYSTEM &&
			node->remote[la].mute == old_mute);

	return 0;
}

static int sac_user_control_press_mute_function(struct node *node, unsigned me, unsigned la, bool interactive)
{
	__u8 ret;

	if ((ret = sac_util_send_user_control_press(node, me, la, 0x65)))
		return ret;
	fail_on_test_v2(node->remote[la].cec_version,
			la == CEC_LOG_ADDR_AUDIOSYSTEM &&
			node->remote[la].mute == CEC_OP_AUD_MUTE_STATUS_ON);

	return 0;
}

static int sac_user_control_press_restore_volume_function(struct node *node, unsigned me, unsigned la, bool interactive)
{
	__u8 ret;

	if ((ret = sac_util_send_user_control_press(node, me, la, 0x66)))
		return ret;
	fail_on_test_v2(node->remote[la].cec_version,
			la == CEC_LOG_ADDR_AUDIOSYSTEM &&
			node->remote[la].mute == CEC_OP_AUD_MUTE_STATUS_OFF);

	return 0;
}

static int sac_user_control_release(struct node *node, unsigned me, unsigned la, bool interactive)
{
	struct cec_msg msg;

	/* The device shall not feature abort User Control Released if it did not
	   feature abort System Audio Mode Request

	   The message is mandatory for audio systems and TVs in CEC 2.0. */
	cec_msg_init(&msg, me, la);
	cec_msg_user_control_released(&msg);
	fail_on_test(!transmit_timeout(node, &msg));
	fail_on_test_v2(node->remote[la].cec_version, unrecognized_op(&msg) &&
			(is_tv(la, node->remote[la].prim_type) || cec_has_audiosystem(1 << la)));
	if (unrecognized_op(&msg) && !node->remote[la].has_sys_audio_mode_req)
		return OK_NOT_SUPPORTED;
	fail_on_test(unrecognized_op(&msg));
	if (refused(&msg))
		return OK_REFUSED;
	if (cec_msg_status_is_abort(&msg))
		return OK_PRESUMED;

	return OK_PRESUMED;
}

static int sac_system_audio_mode_req_off(struct node *node, unsigned me, unsigned la, bool interactive)
{
	if (!node->remote[la].has_sys_audio_mode_req)
		return NOTAPPLICABLE;

	struct cec_msg msg;
	__u8 status;

	cec_msg_init(&msg, me, la);
	cec_msg_system_audio_mode_request(&msg, true, CEC_PHYS_ADDR_INVALID);
	fail_on_test(!transmit_timeout(node, &msg));
	fail_on_test(timed_out(&msg));
	fail_on_test_v2(node->remote[la].cec_version,
			cec_has_audiosystem(1 << la) && unrecognized_op(&msg));
	if (unrecognized_op(&msg))
		return OK_NOT_SUPPORTED;
	if (refused(&msg))
		return OK_REFUSED;
	if (cec_msg_status_is_abort(&msg))
		return OK_PRESUMED;
	cec_ops_set_system_audio_mode(&msg, &status);
	fail_on_test(status != CEC_OP_SYS_AUD_STATUS_OFF);

	return 0;
}

const vec_remote_subtests sac_subtests{
	{
		"Request Short Audio Descriptor",
		CEC_LOG_ADDR_MASK_AUDIOSYSTEM,
		sac_request_sad_probe,
	},
	{
		"Request Short Audio Descriptor, invalid",
		CEC_LOG_ADDR_MASK_AUDIOSYSTEM,
		sac_request_sad_invalid,
	},
	{
		"Report Short Audio Descriptor consistency",
		CEC_LOG_ADDR_MASK_AUDIOSYSTEM,
		sac_sad_format_check,
	},
	{
		"Report Short Audio Descriptor, multiple requests in one",
		CEC_LOG_ADDR_MASK_AUDIOSYSTEM,
		sac_sad_req_multiple,
	},
	{
		"Set System Audio Mode (directly addressed)",
		CEC_LOG_ADDR_MASK_TV,
		sac_set_system_audio_mode_direct,
	},
	{
		"Set System Audio Mode (broadcast on)",
		CEC_LOG_ADDR_MASK_TV,
		sac_set_system_audio_mode_broadcast_on,
	},
	{
		"System Audio Mode Status",
		CEC_LOG_ADDR_MASK_TV,
		sac_system_audio_mode_status,
	},
	{
		"System Audio Mode Request (on)",
		CEC_LOG_ADDR_MASK_AUDIOSYSTEM,
		sac_system_audio_mode_req_on,
	},
	{
		"Give System Audio Mode Status",
		CEC_LOG_ADDR_MASK_AUDIOSYSTEM,
		sac_give_system_audio_mode_status,
	},
	{
		"Give Audio Status",
		CEC_LOG_ADDR_MASK_AUDIOSYSTEM,
		sac_give_audio_status,
	},
	{
		"User Control Pressed (Volume Up)",
		CEC_LOG_ADDR_MASK_AUDIOSYSTEM | CEC_LOG_ADDR_MASK_TV,
		sac_user_control_press_vol_up,
	},
	{
		"User Control Pressed (Volume Down)",
		CEC_LOG_ADDR_MASK_AUDIOSYSTEM | CEC_LOG_ADDR_MASK_TV,
		sac_user_control_press_vol_down,
	},
	{
		"User Control Pressed (Mute)",
		CEC_LOG_ADDR_MASK_AUDIOSYSTEM | CEC_LOG_ADDR_MASK_TV,
		sac_user_control_press_mute,
	},
	{
		"User Control Pressed (Restore Volume Function)",
		CEC_LOG_ADDR_MASK_AUDIOSYSTEM | CEC_LOG_ADDR_MASK_TV,
		sac_user_control_press_restore_volume_function,
	},
	{
		"User Control Pressed (Mute Function)",
		CEC_LOG_ADDR_MASK_AUDIOSYSTEM | CEC_LOG_ADDR_MASK_TV,
		sac_user_control_press_mute_function,
	},
	{
		"User Control Released (Audio)",
		CEC_LOG_ADDR_MASK_AUDIOSYSTEM | CEC_LOG_ADDR_MASK_TV,
		sac_user_control_release,
	},
	{
		"Set System Audio Mode (broadcast off)",
		CEC_LOG_ADDR_MASK_TV,
		sac_set_system_audio_mode_broadcast_off,
	},
	{
		"System Audio Mode Request (off)",
		CEC_LOG_ADDR_MASK_AUDIOSYSTEM,
		sac_system_audio_mode_req_off,
	},
};

/* Audio Rate Control */

static int audio_rate_ctl_set_audio_rate(struct node *node, unsigned me, unsigned la, bool interactive)
{
	struct cec_msg msg;

	cec_msg_init(&msg, me, la);
	cec_msg_set_audio_rate(&msg, CEC_OP_AUD_RATE_WIDE_STD);
	fail_on_test(!transmit_timeout(node, &msg));
	/* CEC 2.0: Devices shall use the device feature bit to indicate support. */
	fail_on_test_v2(node->remote[la].cec_version,
			node->remote[la].has_aud_rate && unrecognized_op(&msg));
	fail_on_test_v2(node->remote[la].cec_version,
			!node->remote[la].has_aud_rate && !unrecognized_op(&msg));
	if (unrecognized_op(&msg))
		return OK_NOT_SUPPORTED;
	if (refused(&msg))
		return OK_REFUSED;

	return OK_PRESUMED;
}

static int audio_rate_ctl_active_sensing(struct node *node, unsigned me, unsigned la, bool interactive)
{
	/*
	 * The source shall go back to Rate Control Off if no Set Audio Rate message is
	 * received for more than 2 seconds.
	 */
	if (!node->remote[la].has_aud_rate)
		return NOTAPPLICABLE;

	struct cec_msg msg;

	cec_msg_init(&msg, me, la);

	/*
	 * Since this subtest runs immediately after Set Audio Rate, delaying the interval
	 * between the two tests is sufficient to test that the Source turns off rate control.
	 */
	sleep(3);
	cec_msg_set_audio_rate(&msg, CEC_OP_AUD_RATE_OFF);
	fail_on_test(!transmit_timeout(node, &msg));
	fail_on_test_v2(node->remote[la].cec_version, unrecognized_op(&msg));
	return OK_PRESUMED;
}

static int audio_rate_ctl_invalid(struct node *node, unsigned me, unsigned la, bool interactive)
{
	if (!node->remote[la].has_aud_rate)
		return NOTAPPLICABLE;

	struct cec_msg msg;

	cec_msg_init(&msg, me, la);
	cec_msg_set_audio_rate(&msg, 0xa); /* Invalid Audio Rate Control message operand */
	fail_on_test(!transmit_timeout(node, &msg));
	fail_on_test(timed_out(&msg));
	fail_on_test(!cec_msg_status_is_abort(&msg));
	if (abort_reason(&msg) != CEC_OP_ABORT_INVALID_OP) {
		warn("Expected Feature Abort [Invalid operand]\n");
		return FAIL;
	}
	return OK;
}

const vec_remote_subtests audio_rate_ctl_subtests{
	{
		"Set Audio Rate",
		CEC_LOG_ADDR_MASK_PLAYBACK | CEC_LOG_ADDR_MASK_RECORD |
		CEC_LOG_ADDR_MASK_TUNER | CEC_LOG_ADDR_MASK_AUDIOSYSTEM,
		audio_rate_ctl_set_audio_rate,
	},
	{
		"Audio Rate Active Sensing",
		CEC_LOG_ADDR_MASK_PLAYBACK | CEC_LOG_ADDR_MASK_RECORD |
		CEC_LOG_ADDR_MASK_TUNER | CEC_LOG_ADDR_MASK_AUDIOSYSTEM,
		audio_rate_ctl_active_sensing,
	},
	{
		"Audio Rate Invalid Operand",
		CEC_LOG_ADDR_MASK_PLAYBACK | CEC_LOG_ADDR_MASK_RECORD |
		CEC_LOG_ADDR_MASK_TUNER | CEC_LOG_ADDR_MASK_AUDIOSYSTEM,
		audio_rate_ctl_invalid,
	},
};