AudioFrame AudioFrame::to(const AudioFormat &fmt) const
{
if (!isValid() || !constBits(0))
return AudioFrame();
//if (fmt == format())
// return clone(); //FIXME: clone a frame from ffmpeg is not enough?
Q_D(const AudioFrame);
// TODO: use a pool
AudioResampler *conv = d->conv;
QScopedPointer<AudioResampler> c;
if (!conv) {
conv = AudioResampler::create(AudioResamplerId_FF);
if (!conv)
conv = AudioResampler::create(AudioResamplerId_Libav);
if (!conv) {
qWarning("no audio resampler is available");
return AudioFrame();
}
c.reset(conv);
}
conv->setInAudioFormat(format());
conv->setOutAudioFormat(fmt);
//conv->prepare(); // already called in setIn/OutFormat
conv->setInSampesPerChannel(samplesPerChannel()); //TODO
if (!conv->convert((const quint8**)d->planes.constData())) {
qWarning() << "AudioFrame::to error: " << format() << "=>" << fmt;
return AudioFrame();
}
AudioFrame f(conv->outData(), fmt);
f.setSamplesPerChannel(conv->outSamplesPerChannel());
f.setTimestamp(timestamp());
f.d_ptr->metadata = d->metadata; // need metadata?
return f;
}
AudioFrame AudioFrame::clone() const
{
Q_D(const AudioFrame);
if (!d->format.isValid())
return AudioFrame();
AudioFrame f(QByteArray(), d->format);
f.setSamplesPerChannel(samplesPerChannel());
f.allocate();
// TODO: Frame.planes(), bytesPerLines()
int nb_planes = f.planeCount();
QVector<uchar*> dst(nb_planes);
for (int i = 0; i < nb_planes; ++i) {
dst[i] = f.bits(i);
}
av_samples_copy(dst.data(), d->planes.data(), 0, 0, samplesPerChannel(), d->format.channels(), (AVSampleFormat)d->format.sampleFormatFFmpeg());
return f;
}
AudioFrame AudioFrame::clone() const
{
Q_D(const AudioFrame);
if (d->format.sampleFormatFFmpeg() == AV_SAMPLE_FMT_NONE
|| d->format.channels() <= 0)
return AudioFrame();
if (d->samples_per_ch <= 0 || bytesPerLine(0) <= 0)
return AudioFrame(format());
QByteArray buf(bytesPerLine()*planeCount(), 0);
AudioFrame f(buf, d->format);
f.setSamplesPerChannel(samplesPerChannel());
char *dst = buf.data(); //must before buf is shared, otherwise data will be detached.
for (int i = 0; i < f.planeCount(); ++i) {
const int plane_size = f.bytesPerLine(i);
memcpy(dst, f.constBits(i), plane_size);
dst += plane_size;
}
f.setTimestamp(timestamp());
// meta data?
return f;
}
