*/staticBOOLwodUpdatePlayedTotal(WINE_WAVEDEV* wwo,snd_pcm_status_t* ps){snd_pcm_sframes_tdelay;snd_pcm_sframes_tavail;snd_pcm_uframes_tbuf_size =0;snd_pcm_state_tstate; state = snd_pcm_state(wwo->pcm); avail = snd_pcm_avail_update(wwo->pcm);snd_pcm_hw_params_get_buffer_size...
snd_pcm_uframes_t buffer_size; snd_pcm_hw_params_get_buffer_size_max(hwparams, &buffer_size); snd_pcm_hw_params_set_buffer_size_near(sound->handle, hwparams, &buffer_size); snd_pcm_uframes_t period_size = buffer_size/4; snd_pcm_hw_params_set_period_size_near(sound->handle, hw...
perror("\nsnd_pcm_hw_params_any:");exit(1); } rc = snd_pcm_hw_params_set_access(handle, params, SND_PCM_ACCESS_RW_INTERLEAVED);//???if(rc <0) { perror("\nsed_pcm_hw_set_access:");exit(1); } rc = snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_S16_LE);...
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: BackendSpecific { err: BackendSpecificError { description: "ALSA function 'snd_pcm_hw_params_set_buffer_size' failed with error 'EINVAL: Invalid argument'" } }', src/main.rs:25:10 ...
PCM录音示例代码 使用异步方法 snd_async_add_pcm_handler()函数 snd_pcm_avail_update()函数 PCM异步播放示例 PCM异步录音示例 使用poll()函数 使用poll I/O多路复用实现读写 PCM播放示例 PCM录音示例 PCM设备状态 PCM播放——加入状态控制 snd_pcm_readi/snd_pcm_writei错误处理 混音器设置 打开混音器 Attach...
snd_pcm_hw_t *hw = pcm->private_data; void *ptr; int err; if (hw->sync_ptr == NULL) { // 如果还没有mmap,那么执行mmap映射内核空间驱动使用的声音缓冲区 ptr = mmap(NULL, page_align(sizeof(struct sndrv_pcm_mmap_control)),
static int snd_pcm_hw_mmap_control(snd_pcm_t *pcm) { snd_pcm_hw_t *hw = pcm->private_data; void *ptr; int err; if (hw->sync_ptr == NULL) { //如果还没有mmap,那么执行mmap映射内核空间驱动使用的声音缓冲区 ptr = mmap(NULL, page_align(sizeof(struct sndrv_pcm_mmap_control)), ...
static int snd_pcm_hw_mmap_control(snd_pcm_t *pcm) { snd_pcm_hw_t *hw = pcm->private_data; void *ptr; int err; if (hw->sync_ptr == NULL) { //如果还没有mmap,那么执行mmap映射内核空间驱动使用的声音缓冲区 ptr = mmap(NULL, page_align(sizeof(struct sndrv_pcm_mmap_control)), ...
First, snd_pcm_hw_params_get_period_size should be called after set hw params finish. Second,memory leak can cause when the format is IMA ADPCM. xree(decoded_data) should be called. ghostassignedawakecodingJun 17, 2013 bmiklautzremoved this from the1.1milestoneMay 25, 2016 ...
snd_pcm_mmap switch (i-type) 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...