void CASpeexDecoder::InitializeCompressionSettings()
{
if (mCookie == NULL)
return;
if (mCompressionInitialized) {
memset(&mSpeexHeader, 0, sizeof(mSpeexHeader));
mSpeexStereoState.balance = 1.0;
mSpeexStereoState.e_ratio = 0.5;
mSpeexStereoState.smooth_left = 1.0;
mSpeexStereoState.smooth_right = 1.0;
if (mSpeexDecoderState != NULL) {
speex_decoder_destroy(mSpeexDecoderState);
mSpeexDecoderState = NULL;
}
}
mCompressionInitialized = false;
OggSerialNoAtom *atom = reinterpret_cast<OggSerialNoAtom*> (mCookie);
Byte *ptrheader = mCookie + EndianU32_BtoN(atom->size);
CookieAtomHeader *aheader = reinterpret_cast<CookieAtomHeader*> (ptrheader);
// scan quickly through the cookie, check types and packet sizes
if (EndianS32_BtoN(atom->type) != kCookieTypeOggSerialNo || static_cast<UInt32> (ptrheader - mCookie) > mCookieSize)
return;
ptrheader += EndianU32_BtoN(aheader->size);
if (EndianS32_BtoN(aheader->type) != kCookieTypeSpeexHeader || static_cast<UInt32> (ptrheader - mCookie) > mCookieSize)
return;
// we ignore the rest: comments and extra headers
// all OK, back to the first speex packet
aheader = reinterpret_cast<CookieAtomHeader*> (mCookie + EndianU32_BtoN(atom->size));
SpeexHeader *inheader = reinterpret_cast<SpeexHeader *> (&aheader->data[0]);
// TODO: convert, at some point, mSpeexHeader to a pointer?
mSpeexHeader.bitrate = EndianS32_LtoN(inheader->bitrate);
mSpeexHeader.extra_headers = EndianS32_LtoN(inheader->extra_headers);
mSpeexHeader.frame_size = EndianS32_LtoN(inheader->frame_size);
mSpeexHeader.frames_per_packet = EndianS32_LtoN(inheader->frames_per_packet);
mSpeexHeader.header_size = EndianS32_LtoN(inheader->header_size);
mSpeexHeader.mode = EndianS32_LtoN(inheader->mode);
mSpeexHeader.mode_bitstream_version = EndianS32_LtoN(inheader->mode_bitstream_version);
mSpeexHeader.nb_channels = EndianS32_LtoN(inheader->nb_channels);
mSpeexHeader.rate = EndianS32_LtoN(inheader->rate);
mSpeexHeader.reserved1 = EndianS32_LtoN(inheader->reserved1);
mSpeexHeader.reserved2 = EndianS32_LtoN(inheader->reserved2);
mSpeexHeader.speex_version_id = EndianS32_LtoN(inheader->speex_version_id);
mSpeexHeader.vbr = EndianS32_LtoN(inheader->vbr);
if (mSpeexHeader.mode >= SPEEX_NB_MODES)
CODEC_THROW(kAudioCodecUnsupportedFormatError);
//TODO: check bitstream version here
mSpeexDecoderState = speex_decoder_init(speex_lib_get_mode(mSpeexHeader.mode));
if (!mSpeexDecoderState)
CODEC_THROW(kAudioCodecUnsupportedFormatError);
//TODO: fix some of the header fields here
int enhzero = 0;
speex_decoder_ctl(mSpeexDecoderState, SPEEX_SET_ENH, &enhzero);
if (mSpeexHeader.nb_channels == 2)
{
SpeexCallback callback;
callback.callback_id = SPEEX_INBAND_STEREO;
callback.func = speex_std_stereo_request_handler;
callback.data = &mSpeexStereoState;
speex_decoder_ctl(mSpeexDecoderState, SPEEX_SET_HANDLER, &callback);
}
mCompressionInitialized = true;
}
int process_first_packet__speex(StreamInfo *si, ogg_page *op, ogg_packet *opckt)
{
unsigned long serialnoatom[3] = { EndianU32_NtoB(sizeof(serialnoatom)), EndianU32_NtoB(kCookieTypeOggSerialNo),
EndianS32_NtoB(ogg_page_serialno(op)) };
unsigned long atomhead[2] = { EndianU32_NtoB(opckt->bytes + sizeof(atomhead)), EndianU32_NtoB(kCookieTypeSpeexHeader) };
SpeexHeader *inheader = (SpeexHeader *) opckt->packet;
si->si_speex.header.bitrate = EndianS32_LtoN(inheader->bitrate);
si->si_speex.header.extra_headers = EndianS32_LtoN(inheader->extra_headers);
si->si_speex.header.frame_size = EndianS32_LtoN(inheader->frame_size);
si->si_speex.header.frames_per_packet = EndianS32_LtoN(inheader->frames_per_packet);
si->si_speex.header.header_size = EndianS32_LtoN(inheader->header_size);
si->si_speex.header.mode = EndianS32_LtoN(inheader->mode);
si->si_speex.header.mode_bitstream_version = EndianS32_LtoN(inheader->mode_bitstream_version);
si->si_speex.header.nb_channels = EndianS32_LtoN(inheader->nb_channels);
si->si_speex.header.rate = EndianS32_LtoN(inheader->rate);
si->si_speex.header.reserved1 = EndianS32_LtoN(inheader->reserved1);
si->si_speex.header.reserved2 = EndianS32_LtoN(inheader->reserved2);
si->si_speex.header.speex_version_id = EndianS32_LtoN(inheader->speex_version_id);
si->si_speex.header.vbr = EndianS32_LtoN(inheader->vbr);
//si->si_speex.header. = EndianS32_LtoN(inheader->);
dbg_printf("! -- - speex_first_packet: ch: %d, rate: %ld\n", si->si_speex.header.nb_channels, si->si_speex.header.rate);
si->numChannels = si->si_speex.header.nb_channels;
si->rate = si->si_speex.header.rate;
//si->lastMediaInserted = 0;
si->mediaLength = 0;
PtrAndHand(serialnoatom, si->soundDescExtension, sizeof(serialnoatom)); //check errors?
PtrAndHand(atomhead, si->soundDescExtension, sizeof(atomhead)); //check errors?
PtrAndHand(opckt->packet, si->soundDescExtension, opckt->bytes); //check errors?
si->si_speex.state = kSStateReadingComments;
return 0;
};
