[igt-dev] [PATCH i-g-t v7 1/8] tests/kms_chamelium: add dp-audio test

Simon Ser
2019-04-23T13:04:50Z

This new test ensures DisplayPort audio works by using the Chamelium.

It enables the DisplayPort output and sends an audio signal containing a set of
frequencies we choose to all HDMI/DisplayPort audio devices. It starts
recording audio on the Chamelium device and uses the stream server to retrieve
captured audio pages. It then checks that the capture audio signal contains the
frequencies we sent, and only those, by computing a FFT.

A new library has been added to libigt to communicate with the stream server.
It implements a simple custom TCP protocol.

In case the test fails, a WAV file with the captured data is saved on disk.

Right now the test has a few limitations:

- Only the first channel is checked
- IGT only generates audio with a single sampling rate (48 KHz)
- Audio data is not captured in real-time

These limitations will be lifted in future patches.

PulseAudio must not run during the tests since ALSA is used directly. To ensure
this, edit /etc/pulse/client.conf and add `autospawn=no`. Then run
`pulseaudio --kill`.

This commit deletes the existing audio tests. They weren't run and required an
exotic configuration (HDMI audio splitter, dummy HDMI sink and a line-in port
on the DUT).

This patch also changes lib/igt_audio to use uint16_t instead of short. The
rationale is:

- The standard says a short is at least 16 bit wide, but a short can be
larger (in practice it won't happen, but better use types correctly)
- It makes it clearer that the audio format is S16_LE, since "16" is
in the type name.

This patch depends on the following Chameleon bugs:

- https://crbug.com/948060
- https://crbug.com/950857

Signed-off-by: Simon Ser <simon.ser@intel.com>
---
docs/audio.txt | 45 ---
docs/chamelium.txt | 34 ++-
lib/igt.h | 1 +
lib/igt_alsa.c | 42 ++-
lib/igt_alsa.h | 1 +
lib/igt_audio.c | 313 ++++++++++++++------
lib/igt_audio.h | 12 +-
lib/igt_aux.c | 31 ++
lib/igt_aux.h | 1 +
lib/igt_chamelium.c | 101 +++++++
lib/igt_chamelium.h | 11 +
lib/igt_chamelium_stream.c | 589 +++++++++++++++++++++++++++++++++++++
lib/igt_chamelium_stream.h | 52 ++++
lib/meson.build | 5 +-
meson.build | 52 ++--
meson_options.txt | 6 -
tests/audio.c | 193 ------------
tests/kms_chamelium.c | 276 ++++++++++++++++-
tests/meson.build | 9 +-
19 files changed, 1382 insertions(+), 392 deletions(-)
delete mode 100644 docs/audio.txt
create mode 100644 lib/igt_chamelium_stream.c
create mode 100644 lib/igt_chamelium_stream.h
delete mode 100644 tests/audio.c

diff --git a/docs/audio.txt b/docs/audio.txt
deleted file mode 100644
index 158ad5d1..00000000
--- a/docs/audio.txt
+++ /dev/null
@@ -1,45 +0,0 @@
-Audio Support in IGT
-====================
-
-This document provides information and instructions about audio support in IGT.
-
-Introduction
-------------
-
-The audio test is aimed at testing the audio features of display connectors,
-such as HDMI.
-
-Test setup
-----------
-
-The setup required for the audio test consists of using an HDMI-VGA adapter with
-an audio-out 3.5 mm jack to extract the audio from the HDMI interface.
-The audio-out jack is connected back to the device-under-test's line-in.
-
-Depending on the behavior of the adapter, it may be necessary to connect a
-ghost VGA dongle to it (in order to emulate a connected display) to enable the
-audio output. There are guides available detailing how to build these.
-
-When executed, the test will automatically send the test audio signal to all
-ALSA audio HDMI outputs and record from the standard ALSA capture device.
-
-Configuration
--------------
-
-In order to deploy the test, ALSA controls have to be configured to set the
-ALSA capture source to line-in. On Intel x86 systems, this can be achieved
-with the following calls to the amixer utility:
-# amixer sset Line 31 on
-# amixer sset "Input Source" Line
-
-It is then useful to store the ALSA state permanently with the alsactl utility:
-# alsactl store
-
-These settings can be restored with the alsactl utility:
-# alsactl restore
-
-It is desirable to ensure that the alsa-restore and alsa-state systemd services
-are enabled to do this job automatically, especially in the case of an
-automated testing system:
-# systemctl enable alsa-restore
-# systemctl enable alsa-state
diff --git a/docs/chamelium.txt b/docs/chamelium.txt
index 0cabcdc6..5cc85d6e 100644
--- a/docs/chamelium.txt
+++ b/docs/chamelium.txt
@@ -139,6 +139,23 @@ $ make remote-install CHAMELEON_HOST=192.168.72.1

The process requires the Chamelium to be connected to the Internet to succeed.

+Audio Capture
+-------------
+
+The Chamelium supports audio capture. IGT tests take advantage of the
+Chamelium streaming server to download audio samples from the Chamelium.
+
+IGT needs direct access to audio devices through ALSA, so PulseAudio needs to
+be stopped (otherwise audio tests will automatically get skipped). To make sure
+PulseAudio isn't running:
+
+- Edit /etc/pulse/client.conf and add autospawn=no
+- Run `pulseaudio --kill` (if it succeeds, it means PulseAudio was running)
+- Make sure a DE that automatically spawns PulseAudio isn't running
+
+In case a test fails, the raw captured audio files will be dumped in a WAV
+file.
+
Contributing Changes to the Daemon
----------------------------------

@@ -146,10 +163,11 @@ Contributions to the Chamelium daemon, just like any contribution to ChromiumOS,
are submitted and reviewed at: https://chromium-review.googlesource.com/

The ChromiumOS project provides an extensive developer guide:
-https://www.chromium.org/chromium-os/developer-guide that assumes running within
-the ChromiumOS build system. Since this is likely not the case for contributing
-to the Chamelium daemon, only the part about uploading changes is relevant:
-https://www.chromium.org/chromium-os/developer-guide#TOC-Upload-your-changes-and-get-a-code-review
+https://chromium.googlesource.com/chromiumos/docs/+/master/developer_guide.md
+It assumes running within the ChromiumOS build system. Since this is likely not
+the case for contributing to the Chamelium daemon, only the part about
+uploading changes is relevant:
+https://chromium.googlesource.com/chromiumos/docs/+/master/developer_guide.md#Upload-your-changes-and-get-a-code-review

Most of the process is about using the Gerrit web interface for submitting and
having the change reviewed and not forgetting the Change-Id, TEST= and BUG=
@@ -162,7 +180,7 @@ Support for the Chamelium platform in IGT is found in the following places:
* lib/igt_chamelium.c: library with Chamelium-related helpers
* tests/kms_chamelium.c: sub-tests using the Chamelium

-As of late August 2017, the following features are tested by IGT:
+As of early April 2019, the following features are tested by IGT:
* Pixel-by-pixel frame integrity tests for DP and HDMI
* Error-trend-based frame integrity tests for VGA
* CRC-based frame integrity tests for DP and HDMI
@@ -173,6 +191,7 @@ As of late August 2017, the following features are tested by IGT:
each interface or combined
* EDID display identifier integrity check for all interfaces
* EDID display identifier change during suspend for all interfaces
+* Audio Fourier-based tests for DP at 48KHz

Future Developments
-------------------
@@ -180,7 +199,10 @@ Future Developments
With the current generation of the hardware platform, support for testing a
number of additional display features could be included as future developments,
including:
-* Audio capture from HDMI and DP
+* Audio capture from HDMI
+* Check all channels are independent from each other
+* Playback using more than 2 channels, different sampling rates and different
+ sample sizes
* High-bandwidth Digital Content Protection (HDCP) streaming to the display
* Remote control forwarding (CEC) sent from the display
* YUV colorspace for HDMI, instead of RGB
diff --git a/lib/igt.h b/lib/igt.h
index 6654a659..5852d557 100644
--- a/lib/igt.h
+++ b/lib/igt.h
@@ -43,6 +43,7 @@
#include "igt_stats.h"
#ifdef HAVE_CHAMELIUM
#include "igt_chamelium.h"
+#include "igt_chamelium_stream.h"
#endif
#include "instdone.h"
#include "intel_batchbuffer.h"
diff --git a/lib/igt_alsa.c b/lib/igt_alsa.c
index bb6682cc..22089881 100644
--- a/lib/igt_alsa.c
+++ b/lib/igt_alsa.c
@@ -26,9 +26,11 @@

#include "config.h"

+#include <limits.h>
#include <alsa/asoundlib.h>

#include "igt_alsa.h"
+#include "igt_aux.h"
#include "igt_core.h"

#define HANDLES_MAX 8
@@ -61,6 +63,26 @@ struct alsa {
int input_samples_trigger;
};

+/**
+ * alsa_has_exclusive_access:
+ * Check whether ALSA has exclusive access to audio devices. Fails if
+ * PulseAudio is running.
+ */
+bool alsa_has_exclusive_access(void)
+{
+ if (igt_is_process_running("pulseaudio")) {
+ igt_warn("alsa doesn't have exclusive access to audio devices\n");
+ igt_warn("It seems that PulseAudio is running. Audio tests "
+ "need direct access to audio devices, so PulseAudio "
+ "needs to be stopped. You can do so by running "
+ "`pulseaudio --kill`. Also make sure to add "
+ "autospawn=no to /etc/pulse/client.conf\n");
+ return false;
+ }
+
+ return true;
+}
+
static void alsa_error_handler(const char *file, int line, const char *function,
int err, const char *fmt, ...)
{
@@ -78,6 +100,10 @@ struct alsa *alsa_init(void)
{
struct alsa *alsa;

+ if (!alsa_has_exclusive_access()) {
+ return NULL;
+ }
+
alsa = malloc(sizeof(struct alsa));
memset(alsa, 0, sizeof(struct alsa));

@@ -553,16 +579,20 @@ int alsa_run(struct alsa *alsa, int duration_ms)
if (ret < 0) {
ret = snd_pcm_recover(handle,
ret, 0);
- if (ret < 0)
+ if (ret < 0) {
+ igt_debug("snd_pcm_recover after snd_pcm_writei failed");
goto complete;
+ }
}

output_counts[i] += ret;
} else if (output_counts[i] < output_trigger &&
ret < 0) {
ret = snd_pcm_recover(handle, ret, 0);
- if (ret < 0)
+ if (ret < 0) {
+ igt_debug("snd_pcm_recover failed");
goto complete;
+ }
}
}

@@ -609,16 +639,20 @@ int alsa_run(struct alsa *alsa, int duration_ms)
ret = 0;
} else if (ret < 0) {
ret = snd_pcm_recover(handle, ret, 0);
- if (ret < 0)
+ if (ret < 0) {
+ igt_debug("snd_pcm_recover after snd_pcm_readi failed");
goto complete;
+ }
}

input_count += ret;
input_total += ret;
} else if (input_count < input_trigger && ret < 0) {
ret = snd_pcm_recover(handle, ret, 0);
- if (ret < 0)
+ if (ret < 0) {
+ igt_debug("snd_pcm_recover failed");
goto complete;
+ }
}
}
} while (!reached);
diff --git a/lib/igt_alsa.h b/lib/igt_alsa.h
index 50795130..5c804b46 100644
--- a/lib/igt_alsa.h
+++ b/lib/igt_alsa.h
@@ -33,6 +33,7 @@

struct alsa;

+bool alsa_has_exclusive_access(void);
struct alsa *alsa_init(void);
int alsa_open_output(struct alsa *alsa, const char *device_name);
int alsa_open_input(struct alsa *alsa, const char *device_name);
diff --git a/lib/igt_audio.c b/lib/igt_audio.c
index a0592d53..7624f565 100644
--- a/lib/igt_audio.c
+++ b/lib/igt_audio.c
@@ -26,8 +26,11 @@

#include "config.h"

-#include <math.h>
+#include <errno.h>
+#include <fcntl.h>
#include <gsl/gsl_fft_real.h>
+#include <math.h>
+#include <unistd.h>

#include "igt_audio.h"
#include "igt_core.h"
@@ -128,7 +131,7 @@ int audio_signal_add_frequency(struct audio_signal *signal, int frequency)
*/
void audio_signal_synthesize(struct audio_signal *signal)
{
- short *period;
+ int16_t *period;
double value;
int frames;
int freq;
@@ -145,9 +148,9 @@ void audio_signal_synthesize(struct audio_signal *signal)

for (j = 0; j < frames; j++) {
value = 2.0 * M_PI * freq / signal->sampling_rate * j;
- value = sin(value) * SHRT_MAX / signal->freqs_count;
+ value = sin(value) * INT16_MAX / signal->freqs_count;

- period[j] = (short) value;
+ period[j] = (int16_t) value;
}

signal->freqs[i].period = period;
@@ -186,17 +189,16 @@ void audio_signal_clean(struct audio_signal *signal)
* signal data (in interleaved S16_LE format), at the requested sampling rate
* and number of channels.
*/
-void audio_signal_fill(struct audio_signal *signal, short *buffer, int frames)
+void audio_signal_fill(struct audio_signal *signal, int16_t *buffer, int frames)
{
- short *destination;
- short *source;
+ int16_t *destination, *source;
int total;
int freq_frames;
int freq_offset;
int count;
int i, j, k;

- memset(buffer, 0, sizeof(short) * signal->channels * frames);
+ memset(buffer, 0, sizeof(int16_t) * signal->channels * frames);

for (i = 0; i < signal->freqs_count; i++) {
total = 0;
@@ -229,97 +231,236 @@ void audio_signal_fill(struct audio_signal *signal, short *buffer, int frames)
}

/**
- * audio_signal_detect:
- * @signal: The target signal structure
- * @channels: The input data's number of channels
- * @sampling_rate: The input data's sampling rate
- * @buffer: The input data's buffer
- * @frames: The input data's number of frames
- *
- * Detect that the frequencies specified in @signal, and only those, are
- * present in the input data. The input data's format is required to be S16_LE.
+ * Checks that frequencies specified in signal, and only those, are included
+ * in the input data.
*
- * Returns: A boolean indicating whether the detection was successful
+ * sampling_rate is given in Hz. data_len is the number of elements in data.
*/
-bool audio_signal_detect(struct audio_signal *signal, int channels,
- int sampling_rate, short *buffer, int frames)
+bool audio_signal_detect(struct audio_signal *signal, int sampling_rate,
+ double *data, size_t data_len)
{
- double data[frames];
- int amplitude[frames / 2];
+ size_t bin_power_len = data_len / 2 + 1;
+ double bin_power[bin_power_len];
bool detected[signal->freqs_count];
- int threshold;
- bool above;
- int error;
- int freq = 0;
- int max;
- int c, i, j;
+ int ret, freq_accuracy, freq, local_max_freq;
+ double max, local_max, threshold;
+ size_t i, j;
+ bool above, success;
+
+ /* Allowed error in Hz due to FFT step */
+ freq_accuracy = sampling_rate / data_len;
+ igt_debug("Allowed freq. error: %d Hz\n", freq_accuracy);
+
+ ret = gsl_fft_real_radix2_transform(data, 1, data_len);
+ igt_assert(ret == 0);
+
+ /* Compute the power received by every bin of the FFT, and record the
+ * maximum power received as a way to normalize all the others.
+ *
+ * For i < data_len / 2, the real part of the i-th term is stored at
+ * data[i] and its imaginary part is stored at data[data_len - i].
+ * i = 0 and i = data_len / 2 are special cases, they are purely real
+ * so their imaginary part isn't stored.
+ *
+ * The power is encoded as the magnitude of the complex number and the
+ * phase is encoded as its angle.
+ */
+ max = 0;
+ bin_power[0] = data[0];
+ for (i = 1; i < bin_power_len - 1; i++) {
+ bin_power[i] = hypot(data[i], data[data_len - i]);
+ if (bin_power[i] > max)
+ max = bin_power[i];
+ }
+ bin_power[bin_power_len - 1] = data[data_len / 2];
+
+ for (i = 0; i < signal->freqs_count; i++)
+ detected[i] = false;
+
+ /* Do a linear search through the FFT bins' power to find the the local
+ * maximums that exceed half of the absolute maximum that we previously
+ * calculated.
+ *
+ * Since the frequencies might not be perfectly aligned with the bins of
+ * the FFT, we need to find the local maximum across some consecutive
+ * bins. Once the power returns under the power threshold, we compare
+ * the frequency of the bin that received the maximum power to the
+ * expected frequencies. If found, we mark this frequency as such,
+ * otherwise we warn that an unexpected frequency was found.
+ */
+ threshold = max / 2;
+ success = true;
+ above = false;
+ local_max = 0;
+ local_max_freq = -1;
+ for (i = 0; i < bin_power_len; i++) {
+ freq = sampling_rate * i / data_len;
+
+ if (bin_power[i] > threshold)
+ above = true;
+
+ if (!above) {
+ continue;
+ }

- /* Allowed error in Hz due to FFT step. */
- error = sampling_rate / frames;
+ /* If we were above the threshold and we're not anymore, it's
+ * time to decide whether the peak frequency is correct or
+ * invalid. */
+ if (bin_power[i] < threshold) {
+ for (j = 0; j < signal->freqs_count; j++) {
+ if (signal->freqs[j].freq >
+ local_max_freq - freq_accuracy &&
+ signal->freqs[j].freq <
+ local_max_freq + freq_accuracy) {
+ detected[j] = true;
+ igt_debug("Frequency %d detected\n",
+ local_max_freq);
+ break;
+ }
+ }

- for (c = 0; c < channels; c++) {
- for (i = 0; i < frames; i++)
- data[i] = (double) buffer[i * channels + c];
+ /* We haven't generated this frequency, but we detected
+ * it. */
+ if (j == signal->freqs_count) {
+ igt_debug("Detected additional frequency: %d\n",
+ local_max_freq);
+ success = false;
+ }

- gsl_fft_real_radix2_transform(data, 1, frames);
+ above = false;
+ local_max = 0;
+ local_max_freq = -1;
+ }

- max = 0;
+ if (bin_power[i] > local_max) {
+ local_max = bin_power[i];
+ local_max_freq = freq;
+ }
+ }

- for (i = 0; i < frames / 2; i++) {
- amplitude[i] = hypot(data[i], data[frames - i]);
- if (amplitude[i] > max)
- max = amplitude[i];
+ /* Check that all frequencies we generated have been detected. */
+ for (i = 0; i < signal->freqs_count; i++) {
+ if (!detected[i]) {
+ igt_debug("Missing frequency: %d\n",
+ signal->freqs[i].freq);
+ success = false;
}
+ }

- for (i = 0; i < signal->freqs_count; i++)
- detected[i] = false;
-
- threshold = max / 2;
- above = false;
- max = 0;
-
- for (i = 0; i < frames / 2; i++) {
- if (amplitude[i] > threshold)
- above = true;
-
- if (above) {
- if (amplitude[i] < threshold) {
- above = false;
- max = 0;
-
- for (j = 0; j < signal->freqs_count; j++) {
- if (signal->freqs[j].freq >
- freq - error &&
- signal->freqs[j].freq <
- freq + error) {
- detected[j] = true;
- break;
- }
- }
-
- /* Detected frequency was not generated. */
- if (j == signal->freqs_count) {
- igt_debug("Detected additional frequency: %d\n",
- freq);
- return false;
- }
- }
+ return success;
+}

- if (amplitude[i] > max) {
- max = amplitude[i];
- freq = sampling_rate * i / frames;
- }
- }
- }
+/**
+ * Extracts a single channel from a multi-channel S32_LE input buffer.
+ */
+size_t audio_extract_channel_s32_le(double *dst, size_t dst_cap,
+ int32_t *src, size_t src_len,
+ int n_channels, int channel)
+{
+ size_t dst_len, i;

- for (i = 0; i < signal->freqs_count; i++) {
- if (!detected[i]) {
- igt_debug("Missing frequency: %d\n",
- signal->freqs[i].freq);
- return false;
- }
- }
+ igt_assert(channel < n_channels);
+ igt_assert(src_len % n_channels == 0);
+ dst_len = src_len / n_channels;
+ igt_assert(dst_len <= dst_cap);
+ for (i = 0; i < dst_len; i++)
+ dst[i] = (double) src[i * n_channels + channel];
+
+ return dst_len;
+}
+
+#define RIFF_TAG "RIFF"
+#define WAVE_TAG "WAVE"
+#define FMT_TAG "fmt "
+#define DATA_TAG "data"
+
+static void
+append_to_buffer(char *dst, size_t *i, const void *src, size_t src_size)
+{
+ memcpy(&dst[*i], src, src_size);
+ *i += src_size;
+}
+
+/**
+ * audio_create_wav_file_s32_le:
+ * @qualifier: the basename of the file (the test name will be prepended, and
+ * the file extension will be appended)
+ * @sample_rate: the sample rate in Hz
+ * @channels: the number of channels
+ * @path: if non-NULL, will be set to a pointer to the new file path (the
+ * caller is responsible for free-ing it)
+ *
+ * Creates a new WAV file.
+ *
+ * After calling this function, the caller is expected to write S32_LE PCM data
+ * to the returned file descriptor.
+ *
+ * See http://www-mmsp.ece.mcgill.ca/Documents/AudioFormats/WAVE/WAVE.html for
+ * a WAV file format specification.
+ *
+ * Returns: a file descriptor to the newly created file, or -1 on error.
+ */
+int audio_create_wav_file_s32_le(const char *qualifier, uint32_t sample_rate,
+ uint16_t channels, char **path)
+{
+ char _path[PATH_MAX];
+ const char *test_name, *subtest_name;
+ int fd;
+ char header[44];
+ size_t i = 0;
+ uint32_t file_size, chunk_size, byte_rate;
+ uint16_t format, block_align, bits_per_sample;
+
+ test_name = igt_test_name();
+ subtest_name = igt_subtest_name();
+
+ igt_assert(igt_frame_dump_path);
+ snprintf(_path, sizeof(_path), "%s/audio-%s-%s-%s.wav",
+ igt_frame_dump_path, test_name, subtest_name, qualifier);
+
+ if (path)
+ *path = strdup(_path);
+
+ igt_debug("Dumping %s audio to %s\n", qualifier, _path);
+ fd = open(_path, O_WRONLY | O_CREAT | O_TRUNC);
+ if (fd < 0) {
+ igt_warn("open failed: %s\n", strerror(errno));
+ return -1;
+ }
+
+ /* File header */
+ file_size = UINT32_MAX; /* unknown file size */
+ append_to_buffer(header, &i, RIFF_TAG, strlen(RIFF_TAG));
+ append_to_buffer(header, &i, &file_size, sizeof(file_size));
+ append_to_buffer(header, &i, WAVE_TAG, strlen(WAVE_TAG));
+
+ /* Format chunk */
+ chunk_size = 16;
+ format = 1; /* PCM */
+ bits_per_sample = 32; /* S32_LE */
+ byte_rate = sample_rate * channels * bits_per_sample / 8;
+ block_align = channels * bits_per_sample / 8;
+ append_to_buffer(header, &i, FMT_TAG, strlen(FMT_TAG));
+ append_to_buffer(header, &i, &chunk_size, sizeof(chunk_size));
+ append_to_buffer(header, &i, &format, sizeof(format));
+ append_to_buffer(header, &i, &channels, sizeof(channels));
+ append_to_buffer(header, &i, &sample_rate, sizeof(sample_rate));
+ append_to_buffer(header, &i, &byte_rate, sizeof(byte_rate));
+ append_to_buffer(header, &i, &block_align, sizeof(block_align));
+ append_to_buffer(header, &i, &bits_per_sample, sizeof(bits_per_sample));
+
+ /* Data chunk */
+ chunk_size = UINT32_MAX; /* unknown chunk size */
+ append_to_buffer(header, &i, DATA_TAG, strlen(DATA_TAG));
+ append_to_buffer(header, &i, &chunk_size, sizeof(chunk_size));
+
+ igt_assert(i == sizeof(header));
+
+ if (write(fd, header, sizeof(header)) != sizeof(header)) {
+ igt_warn("write failed: %s'n", strerror(errno));
+ close(fd);
+ return -1;
}

- return true;
+ return fd;
}
diff --git a/lib/igt_audio.h b/lib/igt_audio.h
index b3b658a4..4aa43e69 100644
--- a/lib/igt_audio.h
+++ b/lib/igt_audio.h
@@ -30,6 +30,7 @@
#include "config.h"

#include <stdbool.h>
+#include <stdint.h>

struct audio_signal;

@@ -37,8 +38,13 @@ struct audio_signal *audio_signal_init(int channels, int sampling_rate);
int audio_signal_add_frequency(struct audio_signal *signal, int frequency);
void audio_signal_synthesize(struct audio_signal *signal);
void audio_signal_clean(struct audio_signal *signal);
-void audio_signal_fill(struct audio_signal *signal, short *buffer, int frames);
-bool audio_signal_detect(struct audio_signal *signal, int channels,
- int sampling_rate, short *buffer, int frames);
+void audio_signal_fill(struct audio_signal *signal, int16_t *buffer, int frames);
+bool audio_signal_detect(struct audio_signal *signal, int sampling_rate,
+ double *data, size_t data_len);
+size_t audio_extract_channel_s32_le(double *dst, size_t dst_cap,
+ int32_t *src, size_t src_len,
+ int n_channels, int channel);
+int audio_create_wav_file_s32_le(const char *qualifier, uint32_t sample_rate,
+ uint16_t channels, char **path);

#endif
diff --git a/lib/igt_aux.c b/lib/igt_aux.c
index 05528352..3dd68d95 100644
--- a/lib/igt_aux.c
+++ b/lib/igt_aux.c
@@ -1259,6 +1259,37 @@ void igt_set_module_param_int(const char *name, int val)
igt_set_module_param(name, str);
}

+/**
+ * igt_is_process_running:
+ * @comm: Name of process in the form found in /proc/pid/comm (limited to 15
+ * chars)
+ *
+ * Returns: true in case the process has been found, false otherwise.
+ *
+ * This function checks in the process table for an entry with the name @comm.
+ */
+int igt_is_process_running(const char *comm)
+{
+ PROCTAB *proc;
+ proc_t *proc_info;
+ bool found = false;
+
+ proc = openproc(PROC_FILLCOM | PROC_FILLSTAT);
+ igt_assert(proc != NULL);
+
+ while ((proc_info = readproc(proc, NULL))) {
+ if (!strncasecmp(proc_info->cmd, comm, sizeof(proc_info->cmd))) {
+ freeproc(proc_info);
+ found = true;
+ break;
+ }
+ freeproc(proc_info);
+ }
+
+ closeproc(proc);
+ return found;
+}
+
/**
* igt_terminate_process:
* @sig: Signal to send
diff --git a/lib/igt_aux.h b/lib/igt_aux.h
index 55392790..dbd88b67 100644
--- a/lib/igt_aux.h
+++ b/lib/igt_aux.h
@@ -279,6 +279,7 @@ bool igt_allow_unlimited_files(void);
void igt_set_module_param(const char *name, const char *val);
void igt_set_module_param_int(const char *name, int val);

+int igt_is_process_running(const char *comm);
int igt_terminate_process(int sig, const char *comm);
void igt_lsof(const char *dpath);

diff --git a/lib/igt_chamelium.c b/lib/igt_chamelium.c
index 02cc9b2c..7c9030d1 100644
--- a/lib/igt_chamelium.c
+++ b/lib/igt_chamelium.c
@@ -218,6 +218,12 @@ void chamelium_destroy_frame_dump(struct chamelium_frame_dump *dump)
free(dump);
}

+void chamelium_destroy_audio_file(struct chamelium_audio_file *audio_file)
+{
+ free(audio_file->path);
+ free(audio_file);
+}
+
struct fsm_monitor_args {
struct chamelium *chamelium;
struct chamelium_port *port;
@@ -924,6 +930,101 @@ int chamelium_get_captured_frame_count(struct chamelium *chamelium)
return ret;
}

+/**
+ * chamelium_start_capturing_audio:
+ * @chamelium: the Chamelium instance
+ * @port: the port to capture audio from (it must support audio)
+ * @save_to_file: whether the captured audio data should be saved to a file on
+ * the Chamelium device
+ *
+ * Starts capturing audio from a Chamelium port. To stop the capture, use
+ * #chamelium_stop_capturing_audio. To retrieve the audio data, either use the
+ * stream server or enable @save_to_file (the latter is mainly useful for
+ * debugging purposes).
+ *
+ * It isn't possible to capture audio from multiple ports at the same time.
+ */
+void chamelium_start_capturing_audio(struct chamelium *chamelium,
+ struct chamelium_port *port,
+ bool save_to_file)
+{
+ xmlrpc_value *res;
+
+ res = chamelium_rpc(chamelium, port, "StartCapturingAudio", "(ib)",
+ port->id, save_to_file);
+ xmlrpc_DECREF(res);
+}
+
+static void audio_format_from_xml(struct chamelium *chamelium,
+ xmlrpc_value *res, int *rate, int *channels)
+{
+ xmlrpc_value *res_type, *res_rate, *res_sample_format, *res_channel;
+ char *type, *sample_format;
+
+ xmlrpc_struct_find_value(&chamelium->env, res, "file_type", &res_type);
+ xmlrpc_struct_find_value(&chamelium->env, res, "rate", &res_rate);
+ xmlrpc_struct_find_value(&chamelium->env, res, "sample_format", &res_sample_format);
+ xmlrpc_struct_find_value(&chamelium->env, res, "channel", &res_channel);
+
+ xmlrpc_read_string(&chamelium->env, res_type, (const char **) &type);
+ igt_assert(strcmp(type, "raw") == 0);
+ free(type);
+
+ xmlrpc_read_string(&chamelium->env, res_sample_format, (const char **) &sample_format);
+ igt_assert(strcmp(sample_format, "S32_LE") == 0);
+ free(sample_format);
+
+ xmlrpc_read_int(&chamelium->env, res_rate, rate);
+ xmlrpc_read_int(&chamelium->env, res_channel, channels);
+
+ xmlrpc_DECREF(res_channel);
+ xmlrpc_DECREF(res_sample_format);
+ xmlrpc_DECREF(res_rate);
+ xmlrpc_DECREF(res_type);
+}
+
+/**
+ * chamelium_stop_capturing_audio:
+ * @chamelium: the Chamelium instance
+ * @port: the port from which audio is being captured
+ *
+ * Stops capturing audio from a Chamelium port. If
+ * #chamelium_start_capturing_audio has been called with @save_to_file enabled,
+ * this function will return a #chamelium_audio_file struct containing details
+ * about the audio file. Once the caller is done with the struct, they should
+ * release it with #chamelium_destroy_audio_file.
+ */
+struct chamelium_audio_file *chamelium_stop_capturing_audio(struct chamelium *chamelium,
+ struct chamelium_port *port)
+{
+ xmlrpc_value *res, *res_path, *res_props;
+ struct chamelium_audio_file *file = NULL;
+ char *path;
+
+ res = chamelium_rpc(chamelium, NULL, "StopCapturingAudio", "(i)",
+ port->id);
+ xmlrpc_array_read_item(&chamelium->env, res, 0, &res_path);
+ xmlrpc_array_read_item(&chamelium->env, res, 1, &res_props);
+
+ xmlrpc_read_string(&chamelium->env, res_path, (const char **) &path);
+
+ if (strlen(path) > 0) {
+ file = calloc(1, sizeof(*file));
+ file->path = path;
+
+ audio_format_from_xml(chamelium, res_props,
+ &file->rate, &file->channels);
+ } else {
+ free(path);
+ }
+
+ xmlrpc_DECREF(res_props);
+ xmlrpc_DECREF(res_path);
+ xmlrpc_DECREF(res);
+
+ return file;
+}
+
static pixman_image_t *convert_frame_format(pixman_image_t *src,
int format)
{
diff --git a/lib/igt_chamelium.h b/lib/igt_chamelium.h
index 233ead85..047f8c5d 100644
--- a/lib/igt_chamelium.h
+++ b/lib/igt_chamelium.h
@@ -53,6 +53,12 @@ enum chamelium_check {
CHAMELIUM_CHECK_CRC,
};

+struct chamelium_audio_file {
+ char *path;
+ int rate; /* Hz */
+ int channels;
+};
+
struct chamelium *chamelium_init(int drm_fd);
void chamelium_deinit(struct chamelium *chamelium);
void chamelium_reset(struct chamelium *chamelium);
@@ -100,6 +106,10 @@ void chamelium_start_capture(struct chamelium *chamelium,
void chamelium_stop_capture(struct chamelium *chamelium, int frame_count);
void chamelium_capture(struct chamelium *chamelium, struct chamelium_port *port,
int x, int y, int w, int h, int frame_count);
+void chamelium_start_capturing_audio(struct chamelium *chamelium,
+ struct chamelium_port *port, bool save_to_file);
+struct chamelium_audio_file *chamelium_stop_capturing_audio(struct chamelium *chamelium,
+ struct chamelium_port *port);
igt_crc_t *chamelium_read_captured_crcs(struct chamelium *chamelium,
int *frame_count);
struct chamelium_frame_dump *chamelium_read_captured_frame(struct chamelium *chamelium,
@@ -131,5 +141,6 @@ void chamelium_assert_frame_match_or_dump(struct chamelium *chamelium,
void chamelium_crop_analog_frame(struct chamelium_frame_dump *dump, int width,
int height);
void chamelium_destroy_frame_dump(struct chamelium_frame_dump *dump);
+void chamelium_destroy_audio_file(struct chamelium_audio_file *audio_file);

#endif /* IGT_CHAMELIUM_H */
diff --git a/lib/igt_chamelium_stream.c b/lib/igt_chamelium_stream.c
new file mode 100644
index 00000000..68ddb217
--- /dev/null
+++ b/lib/igt_chamelium_stream.c
@@ -0,0 +1,589 @@
+/*
+ * Copyright © 2019 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors: Simon Ser <simon.ser@intel.com>
+ */
+
+#include "config.h"
+
+#include <arpa/inet.h>
+#include <errno.h>
+#include <netdb.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include "igt_chamelium_stream.h"
+#include "igt_core.h"
+#include "igt_rc.h"
+
+#define STREAM_PORT 9994
+#define STREAM_VERSION_MAJOR 1
+#define STREAM_VERSION_MINOR 0
+
+enum stream_error {
+ STREAM_ERROR_NONE = 0,
+ STREAM_ERROR_COMMAND = 1,
+ STREAM_ERROR_ARGUMENT = 2,
+ STREAM_ERROR_EXISTS = 3,
+ STREAM_ERROR_VIDEO_MEM_OVERFLOW_STOP = 4,
+ STREAM_ERROR_VIDEO_MEM_OVERFLOW_DROP = 5,
+ STREAM_ERROR_AUDIO_MEM_OVERFLOW_STOP = 6,
+ STREAM_ERROR_AUDIO_MEM_OVERFLOW_DROP = 7,
+ STREAM_ERROR_NO_MEM = 8,
+};
+
+enum stream_message_kind {
+ STREAM_MESSAGE_REQUEST = 0,
+ STREAM_MESSAGE_RESPONSE = 1,
+ STREAM_MESSAGE_DATA = 2,
+};
+
+enum stream_message_type {
+ STREAM_MESSAGE_RESET = 0,
+ STREAM_MESSAGE_GET_VERSION = 1,
+ STREAM_MESSAGE_VIDEO_STREAM = 2,
+ STREAM_MESSAGE_SHRINK_VIDEO = 3,
+ STREAM_MESSAGE_VIDEO_FRAME = 4,
+ STREAM_MESSAGE_DUMP_REALTIME_VIDEO = 5,
+ STREAM_MESSAGE_STOP_DUMP_VIDEO = 6,
+ STREAM_MESSAGE_DUMP_REALTIME_AUDIO = 7,
+ STREAM_MESSAGE_STOP_DUMP_AUDIO = 8,
+};
+
+struct chamelium_stream {
+ char *host;
+ unsigned int port;
+
+ int fd;
+};
+
+static const char *stream_error_str(enum stream_error err)
+{
+ switch (err) {
+ case STREAM_ERROR_NONE:
+ return "no error";
+ case STREAM_ERROR_COMMAND:
+ return "invalid command";
+ case STREAM_ERROR_ARGUMENT:
+ return "invalid arguments";
+ case STREAM_ERROR_EXISTS:
+ return "dump already started";
+ case STREAM_ERROR_VIDEO_MEM_OVERFLOW_STOP:
+ return "video dump stopped after overflow";
+ case STREAM_ERROR_VIDEO_MEM_OVERFLOW_DROP:
+ return "video frame dropped after overflow";
+ case STREAM_ERROR_AUDIO_MEM_OVERFLOW_STOP:
+ return "audio dump stoppred after overflow";
+ case STREAM_ERROR_AUDIO_MEM_OVERFLOW_DROP:
+ return "audio page dropped after overflow";
+ case STREAM_ERROR_NO_MEM:
+ return "out of memory";
+ }
+ return "unknown error";
+}
+
+/**
+ * The Chamelium URL is specified in the configuration file. We need to extract
+ * the host to connect to the stream server.
+ */
+static char *parse_url_host(const char *url)
+{
+ static const char prefix[] = "http://";
+ char *colon;
+
+ if (strstr(url, prefix) != url)
+ return NULL;
+ url += strlen(prefix);
+
+ colon = strchr(url, ':');
+ if (!colon)
+ return NULL;
+
+ return strndup(url, colon - url);
+}
+
+static bool chamelium_stream_read_config(struct chamelium_stream *client)
+{
+ GError *error = NULL;
+ gchar *chamelium_url;
+
+ if (!igt_key_file) {
+ igt_warn("No configuration file available for chamelium\n");
+ return false;
+ }
+
+ chamelium_url = g_key_file_get_string(igt_key_file, "Chamelium", "URL",
+ &error);
+ if (!chamelium_url) {
+ igt_warn("Couldn't read Chamelium URL from config file: %s\n",
+ error->message);
+ return false;
+ }
+
+ client->host = parse_url_host(chamelium_url);
+ if (!client->host) {
+ igt_warn("Invalid Chamelium URL in config file: %s\n",
+ chamelium_url);
+ return false;
+ }
+ client->port = STREAM_PORT;
+
+ return true;
+}
+
+static bool chamelium_stream_connect(struct chamelium_stream *client)
+{
+ int ret;
+ char port_str[16];
+ struct addrinfo hints = {};
+ struct addrinfo *results, *ai;
+ struct timeval tv = {};
+
+ igt_debug("Connecting to Chamelium stream server: tcp://%s:%u\n",
+ client->host, client->port);
+
+ snprintf(port_str, sizeof(port_str), "%u", client->port);
+
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ ret = getaddrinfo(client->host, port_str, &hints, &results);
+ if (ret != 0) {
+ igt_warn("getaddrinfo failed: %s\n", gai_strerror(ret));
+ return false;
+ }
+
+ client->fd = -1;
+ for (ai = results; ai != NULL; ai = ai->ai_next) {
+ client->fd = socket(ai->ai_family, ai->ai_socktype,
+ ai->ai_protocol);
+ if (client->fd == -1)
+ continue;
+
+ if (connect(client->fd, ai->ai_addr, ai->ai_addrlen) == -1) {
+ close(client->fd);
+ client->fd = -1;
+ continue;
+ }
+
+ break;
+ }
+
+ freeaddrinfo(results);
+
+ if (client->fd < 0) {
+ igt_warn("Failed to connect to Chamelium stream server\n");
+ return false;
+ }
+
+ /* Set a read and write timeout of 5 seconds. */
+ tv.tv_sec = 5;
+ setsockopt(client->fd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
+ setsockopt(client->fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
+
+ return true;
+}
+
+static bool read_whole(int fd, void *buf, size_t buf_len)
+{
+ ssize_t ret;
+ size_t n = 0;
+ char *ptr;
+
+ while (n < buf_len) {
+ ptr = (char *) buf + n;
+ ret = read(fd, ptr, buf_len - n);
+ if (ret < 0) {
+ igt_warn("read failed: %s\n", strerror(errno));
+ return false;
+ } else if (ret == 0) {
+ igt_warn("short read\n");
+ return false;
+ }
+ n += ret;
+ }
+
+ return true;
+}
+
+static bool write_whole(int fd, void *buf, size_t buf_len)
+{
+ ssize_t ret;
+ size_t n = 0;
+ char *ptr;
+
+ while (n < buf_len) {
+ ptr = (char *) buf + n;
+ ret = write(fd, ptr, buf_len - n);
+ if (ret < 0) {
+ igt_warn("write failed: %s\n", strerror(errno));
+ return false;
+ } else if (ret == 0) {
+ igt_warn("short write\n");
+ return false;
+ }
+ n += ret;
+ }
+
+ return true;
+}
+
+static bool read_and_discard(int fd, size_t len)
+{
+ char buf[1024];
+ size_t n;
+
+ while (len > 0) {
+ n = len;
+ if (n > sizeof(buf))
+ n = sizeof(buf);
+
+ if (!read_whole(fd, buf, n))
+ return false;
+
+ len -= n;
+ }
+
+ return true;
+}
+
+/** Read a message header from the socket.
+ *
+ * The header is laid out as follows:
+ * - u16: message type
+ * - u16: error code
+ * - u32: message length
+ */
+static bool chamelium_stream_read_header(struct chamelium_stream *client,
+ enum stream_message_kind *kind,
+ enum stream_message_type *type,
+ enum stream_error *err,
+ size_t *len)
+{
+ uint16_t _type;
+ char buf[8];
+
+ if (!read_whole(client->fd, buf, sizeof(buf)))
+ return false;
+
+ _type = ntohs(*(uint16_t *) &buf[0]);
+ *type = _type & 0xFF;
+ *kind = _type >> 8;
+ *err = ntohs(*(uint16_t *) &buf[2]);
+ *len = ntohl(*(uint32_t *) &buf[4]);
+
+ return true;
+}
+
+static bool chamelium_stream_write_header(struct chamelium_stream *client,
+ enum stream_message_type type,
+ enum stream_error err,
+ size_t len)
+{
+ char buf[8];
+ uint16_t _type;
+
+ _type = type | (STREAM_MESSAGE_REQUEST << 8);
+
+ *(uint16_t *) &buf[0] = htons(_type);
+ *(uint16_t *) &buf[2] = htons(err);
+ *(uint32_t *) &buf[4] = htonl(len);
+
+ return write_whole(client->fd, buf, sizeof(buf));
+}
+
+static bool chamelium_stream_read_response(struct chamelium_stream *client,
+ enum stream_message_type type,
+ void *buf, size_t buf_len)
+{
+ enum stream_message_kind read_kind;
+ enum stream_message_type read_type;
+ enum stream_error read_err;
+ size_t read_len;
+
+ if (!chamelium_stream_read_header(client, &read_kind, &read_type,
+ &read_err, &read_len))
+ return false;
+
+ if (read_kind != STREAM_MESSAGE_RESPONSE) {
+ igt_warn("Expected a response, got kind %d\n", read_kind);
+ return false;
+ }
+ if (read_type != type) {
+ igt_warn("Expected message type %d, got %d\n",
+ type, read_type);
+ return false;
+ }
+ if (read_err != STREAM_ERROR_NONE) {
+ igt_warn("Received error: %s (%d)\n",
+ stream_error_str(read_err), read_err);
+ return false;
+ }
+ if (buf_len != read_len) {
+ igt_warn("Received invalid message body size "
+ "(got %zu bytes, want %zu bytes)\n",
+ read_len, buf_len);
+ return false;
+ }
+
+ return read_whole(client->fd, buf, buf_len);
+}
+
+static bool chamelium_stream_write_request(struct chamelium_stream *client,
+ enum stream_message_type type,
+ void *buf, size_t buf_len)
+{
+ if (!chamelium_stream_write_header(client, type, STREAM_ERROR_NONE,
+ buf_len))
+ return false;
+
+ if (buf_len == 0)
+ return true;
+
+ return write_whole(client->fd, buf, buf_len);
+}
+
+static bool chamelium_stream_call(struct chamelium_stream *client,
+ enum stream_message_type type,
+ void *req_buf, size_t req_len,
+ void *resp_buf, size_t resp_len)
+{
+ if (!chamelium_stream_write_request(client, type, req_buf, req_len))
+ return false;
+
+ return chamelium_stream_read_response(client, type, resp_buf, resp_len);
+}
+
+static bool chamelium_stream_check_version(struct chamelium_stream *client)
+{
+ char resp[2];
+ uint8_t major, minor;
+
+ if (!chamelium_stream_call(client, STREAM_MESSAGE_GET_VERSION,
+ NULL, 0, resp, sizeof(resp)))
+ return false;
+
+ major = resp[0];
+ minor = resp[1];
+ if (major != STREAM_VERSION_MAJOR || minor < STREAM_VERSION_MINOR) {
+ igt_warn("Version mismatch (want %d.%d, got %d.%d)\n",
+ STREAM_VERSION_MAJOR, STREAM_VERSION_MINOR,
+ major, minor);
+ return false;
+ }
+
+ return true;
+}
+
+/**
+ * chamelium_stream_dump_realtime_audio:
+ *
+ * Starts audio capture. The caller can then call
+ * #chamelium_stream_receive_realtime_audio to receive audio pages.
+ */
+bool chamelium_stream_dump_realtime_audio(struct chamelium_stream *client,
+ enum chamelium_stream_realtime_mode mode)
+{
+ char req[1];
+
+ igt_debug("Starting real-time audio capture\n");
+
+ req[0] = mode;
+ return chamelium_stream_call(client, STREAM_MESSAGE_DUMP_REALTIME_AUDIO,
+ req, sizeof(req), NULL, 0);
+}
+
+/**
+ * chamelium_stream_receive_realtime_audio:
+ * @page_count: if non-NULL, will be set to the dumped page number
+ * @buf: must either point to a dynamically allocated memory region or NULL
+ * @buf_len: number of elements of *@buf, for zero if @buf is NULL
+ *
+ * Receives one audio page from the streaming server.
+ *
+ * In "best effort" mode, some pages can be dropped. This can be detected via
+ * the page count.
+ *
+ * buf_len will be set to the size of the page. The caller is responsible for
+ * calling free(3) on *buf.
+ */
+bool chamelium_stream_receive_realtime_audio(struct chamelium_stream *client,
+ size_t *page_count,
+ int32_t **buf, size_t *buf_len)
+{
+ enum stream_message_kind kind;
+ enum stream_message_type type;
+ enum stream_error err;
+ size_t body_len;
+ char page_count_buf[4];
+ int32_t *ptr;
+
+ while (true) {
+ if (!chamelium_stream_read_header(client, &kind, &type,
+ &err, &body_len))
+ return false;
+
+ if (kind != STREAM_MESSAGE_DATA) {
+ igt_warn("Expected a data message, got kind %d\n", kind);
+ return false;
+ }
+ if (type != STREAM_MESSAGE_DUMP_REALTIME_AUDIO) {
+ igt_warn("Expected real-time audio dump message, "
+ "got type %d\n", type);
+ return false;
+ }
+
+ if (err == STREAM_ERROR_NONE)
+ break;
+ else if (err != STREAM_ERROR_AUDIO_MEM_OVERFLOW_DROP) {
+ igt_warn("Received error: %s (%d)\n",
+ stream_error_str(err), err);
+ return false;
+ }
+
+ igt_debug("Dropped an audio page because of an overflow\n");
+ igt_assert(body_len == 0);
+ }
+
+ igt_assert(body_len >= sizeof(page_count_buf));
+
+ if (!read_whole(client->fd, page_count_buf, sizeof(page_count_buf)))
+ return false;
+ if (page_count)
+ *page_count = ntohl(*(uint32_t *) &page_count_buf[0]);
+ body_len -= sizeof(page_count_buf);
+
+ igt_assert(body_len % sizeof(int32_t) == 0);
+ if (*buf_len * sizeof(int32_t) != body_len) {
+ ptr = realloc(*buf, body_len);
+ if (!ptr) {
+ igt_warn("realloc failed: %s\n", strerror(errno));
+ return false;
+ }
+ *buf = ptr;
+ *buf_len = body_len / sizeof(int32_t);
+ }
+
+ return read_whole(client->fd, *buf, body_len);
+}
+
+/**
+ * chamelium_stream_stop_realtime_audio:
+ *
+ * Stops real-time audio capture. This also drops any buffered audio pages.
+ * The caller shouldn't call #chamelium_stream_receive_realtime_audio after
+ * stopping audio capture.
+ */
+bool chamelium_stream_stop_realtime_audio(struct chamelium_stream *client)
+{
+ enum stream_message_kind kind;
+ enum stream_message_type type;
+ enum stream_error err;
+ size_t len;
+
+ igt_debug("Stopping real-time audio capture\n");
+
+ if (!chamelium_stream_write_request(client,
+ STREAM_MESSAGE_STOP_DUMP_AUDIO,
+ NULL, 0))
+ return false;
+
+ while (true) {
+ if (!chamelium_stream_read_header(client, &kind, &type,
+ &err, &len))
+ return false;
+
+ if (kind == STREAM_MESSAGE_RESPONSE)
+ break;
+
+ if (!read_and_discard(client->fd, len))
+ return false;
+ }
+
+ if (type != STREAM_MESSAGE_STOP_DUMP_AUDIO) {
+ igt_warn("Unexpected response type %d\n", type);
+ return false;
+ }
+ if (err != STREAM_ERROR_NONE) {
+ igt_warn("Received error: %s (%d)\n",
+ stream_error_str(err), err);
+ return false;
+ }
+ if (len != 0) {
+ igt_warn("Expected an empty response, got %zu bytes\n", len);
+ return false;
+ }
+
+ return true;
+}
+
+/**
+ * chamelium_stream_audio_format:
+ *
+ * Gets the format used for audio pages.
+ *
+ * Data will always be captured in raw pages of S32_LE elements. This function
+ * exposes the sampling rate and the number of channels.
+ */
+void chamelium_stream_audio_format(struct chamelium_stream *stream,
+ int *rate, int *channels)
+{
+ /* TODO: the Chamelium streaming server doesn't expose those yet.
+ * Just hardcode the values for now. */
+ *rate = 48000;
+ *channels = 8;
+}
+
+/**
+ * chamelium_stream_init:
+ *
+ * Connects to the Chamelium streaming server.
+ */
+struct chamelium_stream *chamelium_stream_init(void)
+{
+ struct chamelium_stream *client;
+
+ client = calloc(1, sizeof(*client));
+
+ if (!chamelium_stream_read_config(client))
+ goto error_client;
+ if (!chamelium_stream_connect(client))
+ goto error_client;
+ if (!chamelium_stream_check_version(client))
+ goto error_fd;
+
+ return client;
+
+error_fd:
+ close(client->fd);
+error_client:
+ free(client);
+ return NULL;
+}
+
+void chamelium_stream_deinit(struct chamelium_stream *client)
+{
+ if (close(client->fd) != 0)
+ igt_warn("close failed: %s\n", strerror(errno));
+ free(client);
+}
diff --git a/lib/igt_chamelium_stream.h b/lib/igt_chamelium_stream.h
new file mode 100644
index 00000000..de4e9931
--- /dev/null
+++ b/lib/igt_chamelium_stream.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright © 2019 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors: Simon Ser <simon.ser@intel.com>
+ */
+
+#ifndef IGT_CHAMELIUM_STREAM_H
+#define IGT_CHAMELIUM_STREAM_H
+
+#include "config.h"
+
+enum chamelium_stream_realtime_mode {
+ CHAMELIUM_STREAM_REALTIME_NONE = 0,
+ /* stop dumping when overflow */
+ CHAMELIUM_STREAM_REALTIME_STOP_WHEN_OVERFLOW = 1,
+ /* drop data on overflow */
+ CHAMELIUM_STREAM_REALTIME_BEST_EFFORT = 2,
+};
+
+struct chamelium_stream;
+
+struct chamelium_stream *chamelium_stream_init(void);
+void chamelium_stream_deinit(struct chamelium_stream *client);
+bool chamelium_stream_dump_realtime_audio(struct chamelium_stream *client,
+ enum chamelium_stream_realtime_mode mode);
+void chamelium_stream_audio_format(struct chamelium_stream *stream,
+ int *rate, int *channels);
+bool chamelium_stream_receive_realtime_audio(struct chamelium_stream *client,
+ size_t *page_count,
+ int32_t **buf, size_t *buf_len);
+bool chamelium_stream_stop_realtime_audio(struct chamelium_stream *client);
+
+#endif
diff --git a/lib/meson.build b/lib/meson.build
index 97f701c7..e0b9cf51 100644
--- a/lib/meson.build
+++ b/lib/meson.build
@@ -94,7 +94,7 @@ if valgrind.found()
endif

if gsl.found()
- lib_deps += [ gsl ]
+ lib_deps += gsl
lib_sources += [ 'igt_frame.c', 'igt_audio.c' ]
endif

@@ -103,9 +103,10 @@ if alsa.found()
lib_sources += 'igt_alsa.c'
endif

-if chamelium.found()
+if chamelium_found
lib_deps += chamelium
lib_sources += 'igt_chamelium.c'
+ lib_sources += 'igt_chamelium_stream.c'
endif

srcdir = join_paths(meson.source_root(), 'tests')
diff --git a/meson.build b/meson.build
index 557400a5..be6dff9d 100644
--- a/meson.build
+++ b/meson.build
@@ -64,8 +64,6 @@ _build_overlay = false
_overlay_required = false
_build_man = false
_man_required = false
-_build_audio = false
-_audio_required = false
_build_chamelium = false
_chamelium_required = false
_build_docs = false
@@ -79,7 +77,6 @@ build_overlay = get_option('build_overlay')
overlay_backends = get_option('overlay_backends')
build_man = get_option('build_man')
with_valgrind = get_option('with_valgrind')
-build_audio = get_option('build_audio')
build_chamelium = get_option('build_chamelium')
build_docs = get_option('build_docs')
build_tests = get_option('build_tests')
@@ -91,8 +88,6 @@ _build_overlay = build_overlay != 'false'
_overlay_required = build_overlay == 'true'
_build_man = build_man != 'false'
_man_required = build_man == 'true'
-_build_audio = build_audio != 'false'
-_audio_required = build_audio == 'true'
_build_chamelium = build_chamelium != 'false'
_chamelium_required = build_chamelium == 'true'
_build_docs = build_docs != 'false'
@@ -166,26 +161,6 @@ cairo = dependency('cairo', version : '>1.12.0', required : true)
libudev = dependency('libudev', required : true)
glib = dependency('glib-2.0', required : true)

-gsl = null_dep
-alsa = null_dep
-if _build_audio or _build_chamelium
- gsl = dependency('gsl', required : _audio_required or _chamelium_required)
-endif
-if _build_audio
- alsa = dependency('alsa', required : _audio_required)
-endif
-
-audioinfo = 'No'
-if _build_audio and alsa.found() and gsl.found()
- audioinfo = 'Yes'
-else
- if _audio_required
- error('Cannot build audio test due to missing dependencies')
- endif
- _build_audio = false
-endif
-build_info += 'Build audio test: ' + audioinfo
-
xmlrpc = dependency('xmlrpc', required : false)
xmlrpc_util = dependency('xmlrpc_util', required : false)
xmlrpc_client = dependency('xmlrpc_client', required : false)
@@ -197,21 +172,32 @@ if not xmlrpc.found() and xmlrpc_cmd.found()

if libs_cmd.returncode() == 0 and cflags_cmd.returncode() == 0
xmlrpc = declare_dependency(compile_args: cflags_cmd.stdout().strip().split(),
- link_args : libs_cmd.stdout().strip().split())
+ link_args : libs_cmd.stdout().strip().split())
xmlrpc_util = declare_dependency()
xmlrpc_client = declare_dependency()
endif
endif

+gsl = null_dep
+alsa = null_dep
chamelium = null_dep
+chamelium_found = false # TODO: use a disabler object instead
chameliuminfo = 'No'
-if _build_chamelium and gsl.found() and xmlrpc.found() and xmlrpc_util.found() and xmlrpc_client.found()
- chamelium = declare_dependency(dependencies : [ xmlrpc,
- xmlrpc_util, xmlrpc_client])
- config.set('HAVE_CHAMELIUM', 1)
- chameliuminfo = 'Yes'
-elif _chamelium_required
- error('Cannot build chamelium test due to missing dependencies')
+if _build_chamelium
+ gsl = dependency('gsl', required : _chamelium_required)
+ alsa = dependency('alsa', required : _chamelium_required)
+ chamelium = declare_dependency(dependencies : [
+ xmlrpc,
+ xmlrpc_util,
+ xmlrpc_client,
+ gsl,
+ alsa,
+ ], required : _chamelium_required)
+ if xmlrpc.found() and xmlrpc_util.found() and xmlrpc_client.found() and gsl.found() and alsa.found()
+ config.set('HAVE_CHAMELIUM', 1)
+ chameliuminfo = 'Yes'
+ chamelium_found = true
+ endif
endif
build_info += 'Build Chamelium test: ' + chameliuminfo

diff --git a/meson_options.txt b/meson_options.txt
index 0cd3b350..888efe56 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -10,12 +10,6 @@ option('overlay_backends',
choices : [ 'auto', 'x', 'xv' ],
description : 'Overlay backends to enable')

-option('build_audio',
- type : 'combo',
- value : 'auto',
- choices : ['auto', 'true', 'false'],
- description : 'Build audio test')
-
option('build_chamelium',
type : 'combo',
value : 'auto',
diff --git a/tests/audio.c b/tests/audio.c
deleted file mode 100644
index 560876a3..00000000
--- a/tests/audio.c
+++ /dev/null
@@ -1,193 +0,0 @@
-/*
- * Copyright © 2017 Intel Corporation
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- *
- * Authors:
- * Paul Kocialkowski <paul.kocialkowski@linux.intel.com>
- */
-
-#include "config.h"
-#include "igt.h"
-
-#define PLAYBACK_CHANNELS 2
-#define PLAYBACK_FRAMES 1024
-
-#define CAPTURE_SAMPLE_RATE 48000
-#define CAPTURE_CHANNELS 2
-#define CAPTURE_DEVICE_NAME "default"
-#define CAPTURE_FRAMES 2048
-
-#define RUN_TIMEOUT 2000
-
-struct test_data {
- struct alsa *alsa;
- struct audio_signal *signal;
-
- int streak;
-};
-
-static int sampling_rates[] = {
- 32000,
- 44100,
- 48000,
- 88200,
- 96000,
- 176400,
- 192000,
-};
-
-static int sampling_rates_count = sizeof(sampling_rates) / sizeof(int);
-
-static int test_frequencies[] = {
- 300,
- 600,
- 1200,
- 80000,
- 10000,
-};
-
-static int test_frequencies_count = sizeof(test_frequencies) / sizeof(int);
-
-static int output_callback(void *data, short *buffer, int frames)
-{
- struct test_data *test_data = (struct test_data *) data;
-
- audio_signal_fill(test_data->signal, buffer, frames);
-
- return 0;
-}
-
-static int input_callback(void *data, short *buffer, int frames)
-{
- struct test_data *test_data = (struct test_data *) data;
- bool detect;
-
- detect = audio_signal_detect(test_data->signal, CAPTURE_CHANNELS,
- CAPTURE_SAMPLE_RATE, buffer, frames);
- if (detect)
- test_data->streak++;
- else
- test_data->streak = 0;
-
- /* A streak of 3 gives confidence that the signal is good. */
- if (test_data->streak == 3)
- return 1;
-
- return 0;
-}
-
-static void test_integrity(const char *device_name)
-{
- struct test_data data;
- int sampling_rate;
- bool run = false;
- bool test;
- int i, j;
- int ret;
-
- data.alsa = alsa_init();
- igt_assert(data.alsa);
-
- ret = alsa_open_input(data.alsa, CAPTURE_DEVICE_NAME);
- igt_assert(ret >= 0);
-
- alsa_configure_input(data.alsa, CAPTURE_CHANNELS,
- CAPTURE_SAMPLE_RATE);
-
- alsa_register_input_callback(data.alsa, input_callback, &data,
- CAPTURE_FRAMES);
-
- for (i = 0; i < sampling_rates_count; i++) {
- ret = alsa_open_output(data.alsa, device_name);
- igt_assert(ret >= 0);
-
- sampling_rate = sampling_rates[i];
-
- test = alsa_test_output_configuration(data.alsa,
- PLAYBACK_CHANNELS,
- sampling_rate);
- if (!test) {
- alsa_close_output(data.alsa);
- continue;
- }
-
- igt_debug("Testing with sampling rate %d\n", sampling_rate);
-
- alsa_configure_output(data.alsa, PLAYBACK_CHANNELS,
- sampling_rate);
-
- data.signal = audio_signal_init(PLAYBACK_CHANNELS,
- sampling_rate);
- igt_assert(data.signal);
-
- for (j = 0; j < test_frequencies_count; j++)
- audio_signal_add_frequency(data.signal,
- test_frequencies[j]);
-
- audio_signal_synthesize(data.signal);
-
- alsa_register_output_callback(data.alsa, output_callback,
- &data, PLAYBACK_FRAMES);
-
- data.streak = 0;
-
- ret = alsa_run(data.alsa, RUN_TIMEOUT);
- igt_assert(ret > 0);
-
- audio_signal_clean(data.signal);
- free(data.signal);
-
- alsa_close_output(data.alsa);
-
- run = true;
- }
-
- /* Make sure we tested at least one frequency */
- igt_assert(run);
-
- alsa_close_input(data.alsa);
- free(data.alsa);
-}
-
-static void test_suspend_resume_integrity(const char *device_name,
- enum igt_suspend_state state,
- enum igt_suspend_test test)
-{
- test_integrity(device_name);
-
- igt_system_suspend_autoresume(state, test);
-
- test_integrity(device_name);
-}
-
-igt_main
-{
- igt_subtest("hdmi-integrity")
- test_integrity("HDMI");
-
- igt_subtest("hdmi-integrity-after-suspend")
- test_suspend_resume_integrity("HDMI", SUSPEND_STATE_MEM,
- SUSPEND_TEST_NONE);
-
- igt_subtest("hdmi-integrity-after-hibernate")
- test_suspend_resume_integrity("HDMI", SUSPEND_STATE_DISK,
- SUSPEND_TEST_DEVICES);
-}
diff --git a/tests/kms_chamelium.c b/tests/kms_chamelium.c
index 2dc1049d..a712250a 100644
--- a/tests/kms_chamelium.c
+++ b/tests/kms_chamelium.c
@@ -413,7 +413,7 @@ test_suspend_resume_edid_change(data_t *data, struct chamelium_port *port,

static igt_output_t *
prepare_output(data_t *data,
- struct chamelium_port *port)
+ struct chamelium_port *port, bool set_edid)
{
igt_display_t *display = &data->display;
igt_output_t *output;
@@ -428,7 +428,8 @@ prepare_output(data_t *data,
/* The chamelium's default EDID has a lot of resolutions, way more then
* we need to test
*/
- chamelium_port_set_edid(data->chamelium, port, data->edid_id);
+ if (set_edid)
+ chamelium_port_set_edid(data->chamelium, port, data->edid_id);

chamelium_plug(data->chamelium, port);
wait_for_connector(data, port, DRM_MODE_CONNECTED);
@@ -613,7 +614,7 @@ static void test_display_one_mode(data_t *data, struct chamelium_port *port,

reset_state(data, port);

- output = prepare_output(data, port);
+ output = prepare_output(data, port, true);
connector = chamelium_port_get_connector(data->chamelium, port, false);
primary = igt_output_get_plane_type(output, DRM_PLANE_TYPE_PRIMARY);
igt_assert(primary);
@@ -644,7 +645,7 @@ static void test_display_all_modes(data_t *data, struct chamelium_port *port,

reset_state(data, port);

- output = prepare_output(data, port);
+ output = prepare_output(data, port, true);
connector = chamelium_port_get_connector(data->chamelium, port, false);
primary = igt_output_get_plane_type(output, DRM_PLANE_TYPE_PRIMARY);
igt_assert(primary);
@@ -679,7 +680,7 @@ test_display_frame_dump(data_t *data, struct chamelium_port *port)

reset_state(data, port);

- output = prepare_output(data, port);
+ output = prepare_output(data, port, true);
connector = chamelium_port_get_connector(data->chamelium, port, false);
primary = igt_output_get_plane_type(output, DRM_PLANE_TYPE_PRIMARY);
igt_assert(primary);
@@ -710,6 +711,266 @@ test_display_frame_dump(data_t *data, struct chamelium_port *port)
drmModeFreeConnector(connector);
}

+
+/* Playback parameters control the audio signal we synthesize and send */
+#define PLAYBACK_CHANNELS 2
+#define PLAYBACK_SAMPLES 1024
+
+/* Capture paremeters control the audio signal we receive */
+#define CAPTURE_SAMPLES 2048
+
+#define AUDIO_DURATION 2000 /* ms */
+/* A streak of 3 gives confidence that the signal is good. */
+#define MIN_STREAK 3
+
+/* TODO: Chamelium only supports 48KHz for now */
+static int sampling_rates[] = {
+/* 32000, */
+/* 44100, */
+ 48000,
+/* 88200, */
+/* 96000, */
+/* 176400, */
+/* 192000, */
+};
+
+static int sampling_rates_count = sizeof(sampling_rates) / sizeof(int);
+
+static int test_frequencies[] = {
+ 300,
+ 600,
+ 1200,
+ 80000,
+ 10000,
+};
+
+static int test_frequencies_count = sizeof(test_frequencies) / sizeof(int);
+
+static int
+output_callback(void *data, short *buffer, int frames)
+{
+ struct audio_signal *signal = (struct audio_signal *) data;
+
+ audio_signal_fill(signal, buffer, frames);
+
+ return 0;
+}
+
+static bool
+do_test_display_audio(data_t *data, struct chamelium_port *port,
+ struct alsa *alsa, int playback_channels,
+ int playback_rate)
+{
+ int ret, capture_rate, capture_channels, msec;
+ struct chamelium_audio_file *audio_file;
+ struct chamelium_stream *stream;
+ enum chamelium_stream_realtime_mode stream_mode;
+ struct audio_signal *signal;
+ int32_t *recv, *buf;
+ double *channel;
+ size_t i, streak, page_count;
+ size_t recv_len, buf_len, buf_cap, buf_size, channel_len;
+ bool ok;
+ char dump_suffix[64];
+ char *dump_path = NULL;
+ int dump_fd = -1;
+
+ if (!alsa_test_output_configuration(alsa, playback_channels,
+ playback_rate))
+ return false;
+
+ igt_debug("Testing with playback sampling rate %d\n", playback_rate);
+ alsa_configure_output(alsa, playback_channels, playback_rate);
+
+ chamelium_start_capturing_audio(data->chamelium, port, false);
+
+ stream = chamelium_stream_init();
+ igt_assert(stream);
+
+ stream_mode = CHAMELIUM_STREAM_REALTIME_STOP_WHEN_OVERFLOW;
+ ok = chamelium_stream_dump_realtime_audio(stream, stream_mode);
+ igt_assert(ok);
+
+ chamelium_stream_audio_format(stream, &capture_rate, &capture_channels);
+
+ if (igt_frame_dump_is_enabled()) {
+ snprintf(dump_suffix, sizeof(dump_suffix), "capture-%dch-%d",
+ playback_channels, playback_rate);
+
+ dump_fd = audio_create_wav_file_s32_le(dump_suffix,
+ capture_rate,
+ capture_channels,
+ &dump_path);
+ igt_assert(dump_fd >= 0);
+ }
+
+ signal = audio_signal_init(playback_channels, playback_rate);
+ igt_assert(signal);
+
+ for (i = 0; i < test_frequencies_count; i++)
+ audio_signal_add_frequency(signal, test_frequencies[i]);
+ audio_signal_synthesize(signal);
+
+ alsa_register_output_callback(alsa, output_callback, signal,
+ PLAYBACK_SAMPLES);
+
+ /* TODO: detect signal in real-time */
+ ret = alsa_run(alsa, AUDIO_DURATION);
+ igt_assert(ret == 0);
+
+ alsa_close_output(alsa);
+
+ /* Needs to be a multiple of 128, because that's the number of samples
+ * we get per channel each time we receive an audio page from the
+ * Chamelium device. */
+ channel_len = CAPTURE_SAMPLES;
+ channel = malloc(sizeof(double) * channel_len);
+
+ buf_cap = capture_channels * channel_len;
+ buf = malloc(sizeof(int32_t) * buf_cap);
+ buf_len = 0;
+
+ recv = NULL;
+ recv_len = 0;
+
+ streak = 0;
+ msec = 0;
+ i = 0;
+ while (streak < MIN_STREAK && msec < AUDIO_DURATION) {
+ ok = chamelium_stream_receive_realtime_audio(stream,
+ &page_count,
+ &recv, &recv_len);
+ igt_assert(ok);
+
+ memcpy(&buf[buf_len], recv, recv_len * sizeof(int32_t));
+ buf_len += recv_len;
+
+ if (buf_len < buf_cap)
+ continue;
+ igt_assert(buf_len == buf_cap);
+
+ if (dump_fd >= 0) {
+ buf_size = buf_len * sizeof(int32_t);
+ igt_assert(write(dump_fd, buf, buf_size) == buf_size);
+ }
+
+ /* TODO: check other channels too, not just the first one */
+ audio_extract_channel_s32_le(channel, channel_len, buf, buf_len,
+ capture_channels, 0);
+
+ msec = i * channel_len / (double) capture_rate * 1000;
+ igt_debug("Detecting audio signal, t=%d msec\n", msec);
+
+ if (audio_signal_detect(signal, capture_rate, channel,
+ channel_len))
+ streak++;
+ else
+ streak = 0;
+
+ buf_len = 0;
+ i++;
+ }
+
+ if (dump_fd >= 0) {
+ close(dump_fd);
+ if (streak == MIN_STREAK) {
+ /* Test succeeded, no need to keep the captured data */
+ unlink(dump_path);
+ } else
+ igt_debug("Saved captured audio data to %s\n", dump_path);
+ free(dump_path);
+ }
+
+ free(recv);
+ free(buf);
+ free(channel);
+
+ ok = chamelium_stream_stop_realtime_audio(stream);
+ igt_assert(ok);
+
+ audio_file = chamelium_stop_capturing_audio(data->chamelium,
+ port);
+ if (audio_file) {
+ igt_debug("Audio file saved on the Chamelium in %s\n",
+ audio_file->path);
+ chamelium_destroy_audio_file(audio_file);
+ }
+
+ audio_signal_clean(signal);
+ free(signal);
+
+ chamelium_stream_deinit(stream);
+
+ igt_assert(streak == MIN_STREAK);
+ return true;
+}
+
+static void
+test_display_audio(data_t *data, struct chamelium_port *port,
+ const char *audio_device)
+{
+ bool run = false;
+ struct alsa *alsa;
+ int ret;
+ igt_output_t *output;
+ igt_plane_t *primary;
+ struct igt_fb fb;
+ drmModeModeInfo *mode;
+ drmModeConnector *connector;
+ int fb_id, i;
+
+ igt_require(alsa_has_exclusive_access());
+
+ alsa = alsa_init();
+ igt_assert(alsa);
+
+ reset_state(data, port);
+
+ /* Use the default Chamelium EDID for this test, as the base IGT EDID
+ * doesn't advertise audio support (see drm_detect_monitor_audio in
+ * the kernel tree). */
+ output = prepare_output(data, port, false);
+ connector = chamelium_port_get_connector(data->chamelium, port, false);
+ primary = igt_output_get_plane_type(output, DRM_PLANE_TYPE_PRIMARY);
+ igt_assert(primary);
+
+ /* Enable the output because the receiver won't try to receive audio if
+ * it doesn't receive video. */
+ igt_assert(connector->count_modes > 0);
+ mode = &connector->modes[0];
+
+ fb_id = igt_create_color_pattern_fb(data->drm_fd,
+ mode->hdisplay, mode->vdisplay,
+ DRM_FORMAT_XRGB8888,
+ LOCAL_DRM_FORMAT_MOD_NONE,
+ 0, 0, 0, &fb);
+ igt_assert(fb_id > 0);
+
+ enable_output(data, port, output, mode, &fb);
+
+ for (i = 0; i < sampling_rates_count; i++) {
+ ret = alsa_open_output(alsa, audio_device);
+ igt_assert(ret >= 0);
+
+ /* TODO: playback on all 8 available channels */
+ run |= do_test_display_audio(data, port, alsa,
+ PLAYBACK_CHANNELS,
+ sampling_rates[i]);
+
+ alsa_close_output(alsa);
+ }
+
+ /* Make sure we tested at least one frequency. */
+ igt_assert(run);
+
+ igt_remove_fb(data->drm_fd, &fb);
+
+ drmModeFreeConnector(connector);
+
+ free(alsa);
+}
+
+
static void select_tiled_modifier(igt_plane_t *plane, uint32_t width,
uint32_t height, uint32_t format,
uint64_t *modifier)
@@ -1037,7 +1298,7 @@ static void test_display_planes_random(data_t *data,
reset_state(data, port);

/* Find the connector and pipe. */
- output = prepare_output(data, port);
+ output = prepare_output(data, port, true);

mode = igt_output_get_mode(output);

@@ -1308,6 +1569,9 @@ igt_main

connector_subtest("dp-frame-dump", DisplayPort)
test_display_frame_dump(&data, port);
+
+ connector_subtest("dp-audio", DisplayPort)
+ test_display_audio(&data, port, "HDMI");
}

igt_subtest_group {
diff --git a/tests/meson.build b/tests/meson.build
index e3c8b07f..711979b4 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -239,20 +239,13 @@ if libdrm_nouveau.found()
test_deps += libdrm_nouveau
endif

-if _build_chamelium and chamelium.found()
+if chamelium_found
test_progs += [
'kms_chamelium',
]
test_deps += chamelium
endif

-if _build_audio and alsa.found() and gsl.found()
- test_progs += [
- 'audio',
- ]
- test_deps += alsa
-endif
-
test_executables = []
test_list = []