在音频处理中,采样率(Sample Rate)表示每秒钟对声音进行采样的次数,单位为Hz(赫兹)。采样点数(Sample Count)表示每个通道在一秒钟内的采样点个数。采样率和采样点数之间的关系可以用下式表示: 采样点数 = 采样率 / 秒数 1. 例如,如果采样率为44100Hz,秒数为1秒,则采样点数为44100个。 动态计算采样点数 SDL中...
记录一个音频解码器的上下文信息: wanted_spec.freq = aCodecCtx->sample_rate; wanted_spec.format = AUDIO_S16SYS; wanted_spec.channels = aCodecCtx->channels; wanted_spec.silence = 0; wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE; wanted_spec.callback = audio_callback; wanted_spec.userdata =...
摘自WIKI samples specifies a unit of audio data. When used with SDL_OpenAudioDevice() this refers to the size of the audio buffer in sample frames. A sample frame is a chunk of audio data of the size specified in format multiplied by the number of channels. When the SDL_AudioSpec is us...
记录一个音频解码器的上下文信息: wanted_spec.freq = aCodecCtx->sample_rate; wanted_spec.format=AUDIO_S16SYS; wanted_spec.channels= aCodecCtx->channels; wanted_spec.silence=0; wanted_spec.samples=SDL_AUDIO_BUFFER_SIZE; wanted_spec.callback=audio_callback; wanted_spec.userdata= aCodecCtx; wa...
Uint8*audio_buf;Uint32 audio_len;// 加载音频文件if(SDL_LoadWAV("sample.wav",&wavSpec,&audio_buf,&audio_len)==NULL){printf("Could not load WAV file! SDL_Error: %s\n",SDL_GetError());} 1. 2. 3. 4. 5. 6. 7. 解释:SDL_LoadWAV用于加载 WAV 文件,它会填充 wavSpec 和音频缓冲...
formatspecifies the size and type of each sample element and may be one of the following: 8-bit support SeeSDL_AudioFormatfor more info. channelsspecifies the number of output channels. As of SDL 2.0, supported values are 1 (mono), 2 (stereo), 4 (quad), and 6 (5.1). ...