ffmpeg保存avframe中pcm数据到文件

ffmpeg保存avframe中pcm数据到文件。
代码如下&＃xff1a;

data_size &＃61; av_get_bytes_per_sample(dec_ctx->sample_fmt);if (data_size < 0) {LOGI("get size error");return -1;}LOGI("audio frame size:%d---%d---%d", data_size, frame->nb_samples, frame->sample_rate);frameBufferSize &＃61; frame->nb_samples*data_size*dec_ctx->channels;if (frameBuf&＃61;&＃61;NULL){frameBuf&＃61; static_cast<unsigned char *>(malloc(static_cast<size_t>(frameBufferSize)));}sum&＃61;0;for (i &＃61; 0; i < frame->nb_samples; i&＃43;&＃43;){for (ch &＃61; 0; ch < dec_ctx->channels; ch&＃43;&＃43;){memcpy(frameBuf&＃43;sum, frame->data[ch] &＃43; data_size*i,static_cast<size_t>(data_size));sum&＃43;&＃61;data_size;}}

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