void AudioLoader::flushPacket() {
AVPacket empty;
do {
_dataSize = FFMPEG_BUFFER_SIZE * sizeof(int16_t);
empty.data = 0;
empty.size = 0;
decode_audio_frame(_audioCtx, _buffer, &_dataSize, &empty);
copyFFmpegOutput();
} while (_dataSize > 0);
}
AlgorithmStatus AudioLoader::process() {
if (!parameter("filename").isConfigured()) {
throw EssentiaException("AudioLoader: Trying to call process() on an AudioLoader algo which hasn't been correctly configured.");
}
// read frames until we get a good one
do {
int result = av_read_frame(_demuxCtx, &_packet);
//E_DEBUG(EAlgorithm, "AudioLoader: called av_read_frame(), got result = " << result);
if (result != 0) {
// 0 = OK, < 0 = error or EOF
if (result != AVERROR_EOF) {
char errstring[1204];
av_strerror(result, errstring, sizeof(errstring));
ostringstream msg;
msg << "AudioLoader: Error reading frame: " << errstring;
E_WARNING(msg.str());
}
// TODO: should try reading again on EAGAIN error?
// https://github.com/FFmpeg/FFmpeg/blob/master/ffmpeg.c
shouldStop(true);
flushPacket();
closeAudioFile();
if (_computeMD5) {
av_md5_final(_md5Encoded, _checksum);
_md5.push(uint8_t_to_hex(_checksum, 16));
}
else {
string md5 = "";
_md5.push(md5);
}
return FINISHED;
}
} while (_packet.stream_index != _streamIdx);
// compute md5 first
if (_computeMD5) {
av_md5_update(_md5Encoded, _packet.data, _packet.size);
}
// decode frames in packet
while(_packet.size > 0) {
if (!decodePacket()) break;
copyFFmpegOutput();
}
// neds to be freed !!
av_free_packet(&_packet);
return OK;
}
void AudioLoader::flushPacket() {
AVPacket empty;
av_init_packet(&empty);
do {
_dataSize = FFMPEG_BUFFER_SIZE;
empty.data = NULL;
empty.size = 0;
int len = decode_audio_frame(_audioCtx, _buffer, &_dataSize, &empty);
if (len < 0) {
char errstring[1204];
av_strerror(len, errstring, sizeof(errstring));
ostringstream msg;
msg << "AudioLoader: decoding error while flushing a packet:" << errstring;
E_WARNING(msg.str());
}
copyFFmpegOutput();
} while (_dataSize > 0);
}
AlgorithmStatus AudioLoader::process() {
if (!parameter("filename").isConfigured()) {
throw EssentiaException("AudioLoader: Trying to call process() on an AudioLoader algo which hasn't been correctly configured.");
}
// read frames until we get a good one
do {
int result = av_read_frame(_demuxCtx, &_packet);
//E_DEBUG(EAlgorithm, "AudioLoader: called av_read_frame(), got result = " << result);
if (result != 0) {
shouldStop(true);
flushPacket();
closeAudioFile();
return FINISHED;
}
} while (_packet.stream_index != _streamIdx);
decodePacket();
copyFFmpegOutput();
return OK;
}
