Native Audio Recording Implementation in Tizen

Problem Understanding

The user is facing challenges implementing native audio recording functionality in Tizen. The main issues are:

1. Incomplete documentation in the official tutorial
2. Difficulty understanding file creation process
3. Problems with sample applications (WGT files not easily convertible to source code)
4. Emulator-specific issues with RECORDER_ERROR_INVALID_OPERATION

Solution Methods

1. Official API Documentation Approach:

   • Use the native Media Recorder API documentation: [samsungtizenos.com equivalent link]
   • Focus on the recorder_create(), recorder_set_filename(), and recorder_commit() functions
   • Pay special attention to error handling for RECORDER_ERROR_INVALID_OPERATION

2. Device Testing:

   • As reported by tizengears3, the implementation works on actual devices despite emulator issues
   • Always test on real hardware when encountering emulator-specific problems

3. Alternative Implementation:

   • Consider using the CAPI_MEDIA_RECORDER_MODULE for more control
   • Review the audio permissions in your manifest file

Code Examples

// Basic audio recorder initialization example
recorder_h recorder;
int error_code = recorder_create(RECORDER_TYPE_AUDIO, &recorder);
if (error_code != RECORDER_ERROR_NONE) {
    // Handle error
}

error_code = recorder_set_filename(recorder, "/opt/usr/media/recordings/test.wav");
if (error_code != RECORDER_ERROR_NONE) {
    // Handle error
}

error_code = recorder_commit(recorder);
if (error_code != RECORDER_ERROR_NONE) {
    // Handle error (especially RECORDER_ERROR_INVALID_OPERATION)
}

Additional Tips

• The RECORDER_ERROR_INVALID_OPERATION error often occurs in emulator environments (Tizen 2.3.1+)
• Ensure proper file path permissions when saving recordings
• Consider using the latest Tizen Studio version for better emulator support
• For web applications, use the Web Audio API as an alternative approach