snd_pcm_read--->substream->ops--->platform->pcm_ops\cpu_dai->ops\codec_dai->ops等操作函数,也就是snd_soc_card结构体的成员的操作函数。 其中platform和dma挂钩,而cpu_dai和codec_daii就是用接口操作声卡,不同的是cpu_dai的操作是适合任何声卡,这应该也等同我们所说的协议,而codec_dai就是针对这块声...
how to capure pcm_open void *data use frida? i capure success,but data is wrong .did you have method?pcm_open c code : int pcm_read(struct pcm *pcm, void *data, unsigned int count) | { | struct snd_xferi x; | | if (!(pcm->flags & PCM_IN)...
Log.d(TAG,"RecordRunnable : begin");try{if(mAudioRecord.getState() ==AudioRecord.STATE_INITIALIZED){byte[] buffer =newbyte[recordBufferSize]; mAudioRecord.startRecording();while(!currentThread().isInterrupted() &&isRecording){intread = mAudioRecord.read(buffer, 0, recordBufferSize);if(Audio...
case SND_PCM_AREA_MMAP: // 表示为数据区分配驱动内存,在snd_pcm_hw_channel_info中设置了type ptr = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_FILE|MAP_SHARED, i->u.mmap.fd, i->u.mmap.offset); /* mmap ==> snd_pcm_mmap_data ==> snd_pcm_default_mmap // mmap the DMA buffer ...
publicAudioTrack audioTrack;privateFileInputStream fileInputStream;privateReadDataThread readDataThread;privateDataInputStream dataInputStream;privateintminBufferSize; 初始化AudioTrack对象 publicvoidinit (){//大小只是一个估计值,因为它既不考虑线路也不考虑汇(因为它们都不知道),所以此大小不能保证在负载下顺畅播...
.read = snd_ctl_hw_read,};登录后复制调用snd_pcm_hw_open_fd创建hw PCM设备并配置对应的回调,snd_pcm_hw_open_fd函数原型如下int snd_pcm_hw_open_fd(snd_pcm_t **pcmp, const char *name, int fd, int sync_ptr_ioctl) ret = snd_pcm_new(&pcm, SND_PCM_TYPE_HW, name, info.stream, mo...
if (!(area->vm_flags & VM_READ)) return -EINVAL; runtime = substream->runtime; size = area->vm_end - area->vm_start; if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control))) return -EINVAL; area->vm_ops = &snd_pcm_vm_ops_control; //当对( area->vm_start,area->...
虽然都是linux，芯片也是基于同样的架构，同样的指令集，但是考虑到芯片的实现毕竟是不同的，于是所有涉及...
skipping unlock Cannot connect to server socket err = No such file or directory Cannot connect to server request channel jack server is not running or cannot be started JackShmReadWritePtr::~JackShmReadWritePtr - Init notdonefor-1, skipping unlock JackShmReadWritePtr::~JackShmReadWritePtr - ...
LOGI("%s", "read end"); break; } else{ LOGI("%s", "reading"); } *pcm = out_buffer; break; } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 2.3.4、设置播放状态并手动开始调用回调函数 // 获取播放状态接口 ...