Audio Codec Topology Parsing for Universal Driver Adaptation
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Solution Overview
Problem
The lack of an open standard for PC audio hardware has led to a proliferation of different hardware register sets and drivers, making it difficult to identify and manipulate digital audio converter features in an intelligent manner, resulting in inconsistent and unreliable audio solutions.
Innovation Solution
The development of systems and methods for parsing flexible audio codec topologies, which involve obtaining codec topology information, evaluating it based on valid connection path criteria, and generating valid audio codec topologies to enable a single driver for audio solutions that conform to a general algorithm, thereby allowing the operating system and applications to interface with audio devices effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If proprietary hardware register sets and drivers are used for each audio codec, then specific audio hardware functionality is supported, but device complexity and driver proliferation increase
Solution Approach 1:
The patent implements a universal audio codec driver that can interface with multiple different audio codec hardware configurations through a standardized data transfer engine. The driver uses topology parsing to adapt to various codec architectures (single DAC/ADC, multiple DACs/ADCs, shared resources) without requiring separate proprietary drivers for each hardware variant, thus achieving multi-functionality and reducing driver proliferation.
Solution Approach 2:
The system dynamically determines codec topology parameters (number of DACs, number of ADCs, shared resource configurations) at runtime by parsing codec-specific register sets and capability information. This allows the universal driver to adapt its operation based on the actual hardware configuration, resolving the contradiction between supporting diverse hardware and maintaining a single driver architecture.
2Adaptability or versatility
If multiple proprietary drivers are used to support different audio hardware, then hardware-specific features are maintained, but ease of operation and system consistency deteriorate
Solution Approach 1:
The patent introduces a topology parsing module as an intermediary between the universal audio driver and the diverse codec hardware. This parser translates codec-specific register sets and capability information into a standardized internal representation, allowing the driver to operate consistently across different hardware configurations without exposing hardware-specific complexities to the operating system or applications.
Solution Approach 2:
The driver architecture is segmented into distinct functional layers: a universal driver layer that provides consistent interfaces, a topology parsing layer that handles hardware-specific variations, and a data transfer engine layer that performs actual audio data operations. This segmentation allows each layer to handle its specific concerns independently, maintaining ease of operation at the driver interface while supporting diverse hardware features.
3Reliability
If codec topology information is parsed and evaluated, then valid audio codec topologies are identified, but processing time and computational resources increase
Solution Approach 1:
The system performs topology parsing and evaluation during system initialization or codec enumeration phases, before actual audio processing begins. By determining the codec topology structure in advance and caching the results, the system ensures accurate topology identification without incurring processing delays during runtime audio operations.
Data Source
AI summary
Systems and methods for parsing flexible audio codec topologies are described. In one aspect, codec topology information is obtained from an audio codec. The codec topology information includes a list of processing node connections and configuration default data for respective processing nodes associated with the audio codec. The codec topology information is evaluated to identify valid audio codec topologies based on set of valid connection path criteria.