Gstreamer Multimedia TestSuite (Video/Audio/Display/Camera)

Implemented comprehensive GStreamer validation with 21 test cases across
four independent suites:

Video: H.264/H.265/VP9 encode/decode with V4L2 (10 tests)
Audio: PulseAudio capture/playback (2 tests)
Display: Wayland compositor validation (4 tests)
Camera: libcamera capture and encoding (5 tests)
Features master runner, per-suite execution, common validation framework,
detailed logging, and CI/CD integration (LAVA YAML configs)

Signed-off-by: ramyathallam <rthallam@qti.qualcomm.com>

Author: ramyathallam

Runner/suites/Gstreamer/Audio/Gstreamer_Audio_Tests.yaml

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+# Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
+# SPDX-License-Identifier: BSD-3-Clause-Clear
+
+metadata:
+  format: Lava-Test Test Definition 1.0
+  name: Gstreamer_Audio_Tests
+  description: "GStreamer Audio Pipeline Tests - Encode/Decode validation using PulseAudio"
+  maintainer:
+    - qualcomm-linux-test@quicinc.com
+  os:
+    - linux
+  scope:
+    - functional
+
+params:
+  TIMEOUT: "120"
+  STRICT: "false"
+  DMESG_SCAN: "true"
+  LOGLEVEL: "INFO"
+
+run:
+  steps:
+    - cd Runner/suites/Gstreamer/Audio
+    - ./run.sh --all

Runner/suites/Gstreamer/Audio/README.md

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+# GStreamer Audio Tests
+
+## Overview
+
+This test suite validates GStreamer audio pipelines using PulseAudio for capture and playback on Qualcomm platforms. It tests audio encoding (capture to WAV) and decoding (WAV playback) functionality.
+
+## Test Cases
+
+### 1. audio-encode
+**Pipeline:**
+```bash
+gst-launch-1.0 pulsesrc ! audioconvert ! audioresample ! identity eos-after=2000 ! wavenc ! filesink location=./output_audio.wav
+```
+
+**Description:**
+- Captures audio from PulseAudio source
+- Converts and resamples audio format
+- Uses identity element with eos-after=2000 (2 seconds) for controlled capture
+- Encodes to WAV format
+- Saves to output_audio.wav
+
+**Validation:**
+- Pipeline completes without errors
+- Output file is created
+- No ERROR/WARNING messages in GStreamer output
+- No dmesg errors (if DMESG_SCAN enabled)
+
+### 2. audio-decode
+**Pipeline:**
+```bash
+gst-launch-1.0 filesrc location=./output_audio.wav ! wavparse ! audioconvert ! audioresample ! pulsesink
+```
+
+**Description:**
+- Reads WAV file created by audio-encode test
+- Parses WAV format
+- Converts and resamples audio
+- Plays back through PulseAudio sink
+
+**Validation:**
+- Pipeline completes without errors
+- Audio playback successful
+- No ERROR/WARNING messages in GStreamer output
+- No dmesg errors (if DMESG_SCAN enabled)
+
+## Prerequisites
+
+### Required Packages
+```bash
+# GStreamer core and plugins
+gstreamer1.0-tools
+gstreamer1.0-plugins-base
+gstreamer1.0-plugins-good
+
+# PulseAudio support
+pulseaudio
+gstreamer1.0-pulseaudio
+```
+
+### Audio Hardware
+- Working audio capture device (microphone)
+- Working audio playback device (speakers/headphones)
+- PulseAudio server running
+
+### Verification
+```bash
+# Check PulseAudio status
+pulseaudio --check
+echo $?  # Should return 0
+
+# List audio sources
+pactl list sources short
+
+# List audio sinks
+pactl list sinks short
+
+# Test audio capture
+gst-launch-1.0 pulsesrc ! fakesink
+
+# Test audio playback
+gst-launch-1.0 audiotestsrc ! pulsesink
+```
+
+## Usage
+
+### Run All Tests
+```bash
+./run.sh --all
+```
+
+### Run Specific Test
+```bash
+./run.sh --test audio-encode
+./run.sh --test audio-decode
+```
+
+### List Available Tests
+```bash
+./run.sh --list
+```
+
+### Custom Timeout
+```bash
+./run.sh --all --timeout 180
+```
+
+### Enable Strict Mode
+```bash
+./run.sh --all --strict
+```
+
+### Disable dmesg Scanning
+```bash
+./run.sh --all --no-dmesg
+```
+
+## CLI Options
+
+| Option | Description | Default |
+|--------|-------------|---------|
+| `--all` | Run all audio tests | - |
+| `--test <name>` | Run specific test | - |
+| `--list` | List available tests | - |
+| `--timeout <sec>` | Timeout per test | 120 |
+| `--repeat <n>` | Repeat count | 1 |
+| `--repeat-policy <all\|any>` | Pass policy | all |
+| `--strict` | Fail on warnings | false |
+| `--no-dmesg` | Skip dmesg scan | false |
+| `--help` | Show help | - |
+
+## Output Files
+
+### Result Files
+- `Gstreamer_Audio_Tests.res` - Overall PASS/FAIL/SKIP status
+- `logs_Gstreamer_Audio_Tests/` - Detailed logs directory
+  - `audio-encode.log` - Encode test output
+  - `audio-decode.log` - Decode test output
+  - `summary.txt` - Test summary
+  - `results.csv` - CSV format results
+  - `.junit_cases.xml` - JUnit XML for CI
+  - `dmesg_snapshot.log` - Kernel messages
+  - `dmesg_errors.log` - Kernel errors (if any)
+
+### Generated Files
+- `output_audio.wav` - Audio file created by encode test
+
+## Validation Criteria
+
+### Pass Criteria
+✓ Pipeline executes without errors  
+✓ Output files created successfully  
+✓ No ERROR messages in GStreamer output  
+✓ No WARNING messages (if --strict enabled)  
+✓ No kernel errors in dmesg (if DMESG_SCAN enabled)  
+✓ Exit code 0 from gst-launch-1.0  
+
+### Fail Criteria
+✗ Pipeline execution fails  
+✗ ERROR messages in GStreamer output  
+✗ WARNING messages (in strict mode)  
+✗ Timeout exceeded  
+✗ Output file not created  
+✗ Kernel errors detected  
+
+## Troubleshooting
+
+### PulseAudio Not Running
+```bash
+# Start PulseAudio
+pulseaudio --start
+
+# Check status
+pulseaudio --check
+```
+
+### No Audio Devices
+```bash
+# List available sources
+pactl list sources short
+
+# List available sinks
+pactl list sinks short
+
+# Set default source/sink
+pactl set-default-source <source-name>
+pactl set-default-sink <sink-name>
+```
+
+### Permission Issues
+```bash
+# Add user to audio group
+sudo usermod -a -G audio $USER
+
+# Verify group membership
+groups $USER
+```
+
+### Audio Capture Fails
+```bash
+# Test with audiotestsrc instead
+gst-launch-1.0 audiotestsrc ! audioconvert ! audioresample ! wavenc ! filesink location=test.wav
+
+# Check microphone permissions
+ls -la /dev/snd/
+
+# Test with arecord
+arecord -d 2 -f cd test.wav
+```
+
+### Audio Playback Fails
+```bash
+# Test with speaker-test
+speaker-test -t sine -f 440 -c 2
+
+# Test with aplay
+aplay test.wav
+
+# Check volume levels
+pactl list sinks | grep -i volume
+```
+
+### Pipeline Negotiation Errors
+```bash
+# Enable debug output
+GST_DEBUG=3 gst-launch-1.0 pulsesrc ! audioconvert ! audioresample ! wavenc ! filesink location=test.wav
+
+# Check supported formats
+gst-inspect-1.0 pulsesrc
+gst-inspect-1.0 wavenc
+```
+
+### Common Error Messages
+
+**"Could not open audio device for recording"**
+- PulseAudio not running or no capture device available
+- Check: `pactl list sources short`
+
+**"Could not open audio device for playback"**
+- PulseAudio not running or no playback device available
+- Check: `pactl list sinks short`
+
+**"Failed to connect stream"**
+- PulseAudio server connection issue
+- Restart: `pulseaudio --kill && pulseaudio --start`
+
+**"No space left on device"**
+- Insufficient disk space for output file
+- Check: `df -h .`
+
+## Environment Variables
+
+```bash
+# GStreamer debug level (0-9)
+export GST_DEBUG=3
+
+# PulseAudio server
+export PULSE_SERVER=unix:/run/user/1000/pulse/native
+
+# Audio buffer size
+export PULSE_LATENCY_MSEC=50
+```
+
+## CI/CD Integration
+
+### LAVA Integration
+```yaml
+- test:
+    definitions:
+      - repository: https://git.codelinaro.org/clo/le/le-test-automation/qcom-linux-testkit
+        from: git
+        path: Runner/suites/Gstreamer/Audio/Gstreamer_Audio_Tests.yaml
+        name: gstreamer-audio-tests
+        parameters:
+          TIMEOUT: "120"
+          STRICT: "false"
+          DMESG_SCAN: "true"
+```
+
+### Standalone Execution
+```bash
+# Basic run
+cd /path/to/qcom-linux-testkit/Runner/suites/Gstreamer/Audio
+./run.sh --all
+
+# With custom parameters
+TIMEOUT=180 STRICT=true ./run.sh --all
+```
+
+## Platform Support
+
+| Platform | Status | Notes |
+|----------|--------|-------|
+| QCS6490 | ✓ Supported | Full audio support |
+| QCS8550 | ✓ Supported | Full audio support |
+| QCS8650 | ✓ Supported | Full audio support |
+| SA8775P | ✓ Supported | Full audio support |
+| SA8650P | ✓ Supported | Full audio support |
+| SA8255P | ✓ Supported | Full audio support |
+
+## Known Issues
+
+1. **PulseAudio Latency**: Some platforms may experience audio latency
+   - Workaround: Adjust `PULSE_LATENCY_MSEC` environment variable
+
+2. **Device Busy**: Audio device may be in use by another application
+   - Workaround: Stop other audio applications or use `fuser -k /dev/snd/*`
+
+3. **Sample Rate Mismatch**: Some devices may not support default sample rates
+   - Workaround: Explicitly set sample rate in pipeline with `audio/x-raw,rate=48000`
+
+## Additional Resources
+
+- [GStreamer Documentation](https://gstreamer.freedesktop.org/documentation/)
+- [PulseAudio Documentation](https://www.freedesktop.org/wiki/Software/PulseAudio/)
+- [GStreamer PulseAudio Plugin](https://gstreamer.freedesktop.org/documentation/pulseaudio/)
+- [Audio Debugging Guide](https://wiki.archlinux.org/title/PulseAudio/Troubleshooting)
+
+## License
+
+```
+Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
+SPDX-License-Identifier: BSD-3-Clause-Clear