如何判断硬件解码器或者软件解码器

方法一：

根据源码frameworks/av/media/libstagefright/MediaCodecList.cpp

bool MediaCodecList::isSoftwareCodec(const AString &componentName) { return componentName.startsWithIgnoreCase("OMX.google.") || componentName.startsWithIgnoreCase("c2.android.") || (!componentName.startsWithIgnoreCase("OMX.") && !componentName.startsWithIgnoreCase("c2.")); }

根据这段代码的逻辑，OMX.google和c2.android开头的就是原生的软件解码器

此外的OMX或者c2开头，就是硬件解码器，如c2.qti.avc.decoder

media_codecs.xml文件路径：
code：android/device/qcom/msm8996（平台名）或者android/frameworks/av/media/libstagefright/data
设备：/vendor/etc/media_codecs.xml

这个文件被frameworks/av/media/libstagefright/xmlparser/MediaCodecsXmlParser.cpp解析。

方法二：

在APP中从MediaCodecInfo中使用isHardwareAccelerated()获取相关信息，参考以下代码

private boolean isH265Supported() { MediaCodecList codecList = new MediaCodecList(MediaCodecList.ALL_CODECS); boolean isHardware = false; for (MediaCodecInfo codecInfo : codecList.getCodecInfos()) { String name = codecInfo.getName(); if (name.contains("hevc") && name.contains("decoder")) { Log.i("硬解", "===>分析中: " + name + " ==="); String architecture = getArchitectureType(name); Log.i("硬解", "===>类型: " + architecture); isHardware = codecInfo.isHardwareAccelerated(); Log.i("硬解", "===>支持硬件加速: " + isHardware); analyzePerformanceCharacteristics(codecInfo); } } return isHardware; } private static String getArchitectureType(String codecName) { if (codecName.startsWith("OMX.qcom.")) { return "Qualcomm VPU (Video Processing Unit) - 专用视频硬件"; } else if (codecName.startsWith("OMX.")) { return "Vendor VPU - 厂商专用视频硬件"; } else if (codecName.startsWith("c2.android.")) { return "CPU Software - 中央处理器软件解码"; } else if (codecName.startsWith("c2.")) { return "Modern VPU/DSP - 现代视频处理单元"; } else if (codecName.contains("mediacodec")) { return "GPU (罕见) - 图形处理器"; } else { return "Unknown"; } } private static void analyzePerformanceCharacteristics(MediaCodecInfo codecInfo) { try { if(codecInfo.getName().contains("c2.dolby.decoder.hevc")){ Log.i("硬解","===>" + codecInfo.getName() + " MediaCodec不支持杜比: codec does not support type"); return; } MediaCodecInfo.CodecCapabilities caps = codecInfo.getCapabilitiesForType("video/hevc"); if (caps != null) { MediaCodecInfo.VideoCapabilities videoCaps = caps.getVideoCapabilities(); assert videoCaps != null; Log.i("硬解", "===>支持最高分辨率: " + videoCaps.getSupportedWidths().getUpper() + "x" + videoCaps.getSupportedHeights().getUpper()); Log.i("硬解", "===>性能级别: " + (videoCaps.getSupportedWidths().getUpper() >= 7680 ? "8K Capable" : "4K/HDR Capable")); } } catch (Exception e) { Log.e("硬解", "===>分析出错: ", e); } }