我的播放器,音频像是电视信号不好,需要动一下天线,有那种沙沙声。 明确音频数据问题,在get音频数据处找问题。
代码如下
int YaoAVFrame::getAudioPackedData(unsigned char * data){
//每个样本的字节数 * 每个声道的样本数 * 声道数
int bufferSize = getPerSampleSize() * getNBSamples() * getChannels();
if(data == nullptr){
return bufferSize;
}
// 判断是 Packed 还是 Plane
int isPanar = av_sample_fmt_is_planar((AVSampleFormat)imp->frame->format);
if(isPanar){
//EyerLog("Planar\n");
SwrContext * swrCtx = swr_alloc_set_opts(
NULL,
imp->frame->channel_layout,
// av_get_packed_sample_fmt((AVSampleFormat)imp->frame->format),
AVSampleFormat::AV_SAMPLE_FMT_S32,
imp->frame->sample_rate,
imp->frame->channel_layout,
(AVSampleFormat)imp->frame->format,
imp->frame->sample_rate,
0,
NULL
);
swr_init(swrCtx);
int ret = swr_convert(swrCtx, &data, imp->frame->nb_samples, (const uint8_t **)imp->frame->data, imp->frame->nb_samples);
swr_free(&swrCtx);
}
else{
//EyerLog("Packed\n");
memcpy(data, imp->frame->data[0], bufferSize);
}
return 0;
}