jint setData(JNIEnv *env,jclass clz,jstring name){
pause=1;
i=0;
tni=0;
LOGI("%s","setData");
const char *file=(*env)->GetStringUTFChars(env,name,0);
if(avformat_open_input(&pFormatCtx,file,NULL,NULL)!=0)return -1;
if(avformat_find_stream_info(pFormatCtx,NULL)<0)return -2;
av_dump_format(pFormatCtx,-1,file,0);
audioIndex=-1;
int index;
audioIndex=av_find_best_stream(pFormatCtx, AVMEDIA_TYPE_AUDIO, -1, -1, &pCodec, 0);
if(audioIndex<0)return -3;
pCodecCtx = pFormatCtx->streams[audioIndex]->codec;
av_log(NULL,AV_LOG_INFO,"解码器:%s",pCodec->name);
ran= pFormatCtx->streams[audioIndex]->time_base;
duration = pFormatCtx->streams[audioIndex]->duration;
if(avcodec_open2(pCodecCtx,pCodec,NULL)<0)return -4;
pFrame=av_frame_alloc();
if(pFrame==NULL)return -5;
packet = (AVPacket *)av_malloc(sizeof(AVPacket));
av_init_packet(packet);
ret=av_read_frame(pFormatCtx,packet);
init_swr();
i=1;
(*env)->ReleaseStringUTFChars(env,name,file);
return 0;
}
/**
* Initialize our main context FFAudioIO, so that SwrContext, decode buffers and the encoder are set
* to reasonable values.
*
* @param JNIEnv env
* @param aio our context, FFAudioIO
* @return a negative value, if something went wrong
*/
int ff_init_audioio(JNIEnv *env, FFAudioIO *aio) {
int res = 0;
int nb_planes;
AVCodec *codec = NULL;
aio->timestamp = 0;
// allocate pointer to the audio buffers, i.e. the multiple planes/channels.
nb_planes = av_sample_fmt_is_planar(aio->stream->codecpar->format)
? aio->stream->codecpar->channels
: 1;
// always init SWR to keep code simpler
res = init_swr(env, aio);
if (res < 0) {
// exception is already thrown
goto bail;
}
// if for some reason the codec delivers 24bit, we need to encode its output to little endian
if (aio->stream->codecpar->bits_per_coded_sample == 24) {
codec = ff_find_encoder(aio->stream->codecpar->format, aio->stream->codecpar->bits_per_coded_sample, ff_big_endian(aio->stream->codecpar->codec_id), 1);
if (!codec) {
res = AVERROR(EINVAL);
throwIOExceptionIfError(env, res, "Could not find suitable encoder codec.");
goto bail;
}
res = ff_init_encoder(env, aio, codec);
if (res<0) {
throwIOExceptionIfError(env, res, "Could not initialize encoder codec.");
goto bail;
}
}
// allocate the buffer the codec decodes to
aio->audio_data = av_mallocz(sizeof(uint8_t *) * nb_planes);
if (!aio->audio_data) {
res = AVERROR(ENOMEM);
throwIOExceptionIfError(env, res, "Could not allocate audio data buffers.");
goto bail;
}
aio->decode_frame = av_frame_alloc();
if (!aio->decode_frame) {
res = AVERROR(ENOMEM);
throwIOExceptionIfError(env, res, "Could not allocate frame.");
goto bail;
}
// initialize packet
av_init_packet(&(aio->decode_packet));
aio->decode_packet.data = NULL;
aio->decode_packet.size = 0;
bail:
return res;
}
