static void close_output(void)
{
FLAC_ctx *ctx;
ctx = flac_ctx;
if (ctx == NULL)
return;
if (dpm.fd < 0) {
flac_session_close();
return;
}
if (flac_options.isogg) {
if ((ctx->state.ogg = FLAC__stream_encoder_get_state(ctx->encoder.ogg.stream)) != FLAC__STREAM_ENCODER_OK) {
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "OggFLAC stream encoder is invalid (%s)",
FLAC__StreamEncoderStateString[ctx->state.ogg]);
/* fall through */
}
}
else
if (flac_options.seekable) {
if ((ctx->state.s_flac = FLAC__stream_encoder_get_state(ctx->encoder.flac.s_stream)) != FLAC__STREAM_ENCODER_OK) {
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "FLAC stream encoder is invalid (%s)",
FLAC__StreamEncoderStateString[ctx->state.s_flac]);
/* fall through */
}
}
else
{
if ((ctx->state.flac = FLAC__stream_encoder_get_state(ctx->encoder.flac.stream)) != FLAC__STREAM_ENCODER_OK) {
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "FLAC stream encoder is invalid (%s)",
FLAC__StreamEncoderStateString[ctx->state.flac]);
/* fall through */
}
}
ctl->cmsg(CMSG_INFO, VERB_NORMAL, "Wrote %lu/%lu bytes(%g%% compressed)",
ctx->out_bytes, ctx->in_bytes, ((double)ctx->out_bytes / (double)ctx->in_bytes) * 100.);
flac_session_close();
#ifdef AU_FLAC_DLL
g_free_libFLAC_dll ();
#endif
#ifdef AU_OGGFLAC_DLL
g_free_libOggFLAC_dll ();
#endif
}
static size_t write_samples(sox_format_t * const ft, sox_sample_t const * const sampleBuffer, size_t const len)
{
priv_t * p = (priv_t *)ft->priv;
unsigned i;
for (i = 0; i < len; ++i) {
SOX_SAMPLE_LOCALS;
long pcm = SOX_SAMPLE_TO_SIGNED_32BIT(sampleBuffer[i], ft->clips);
p->decoded_samples[i] = pcm >> (32 - p->bits_per_sample);
switch (p->bits_per_sample) {
case 8: p->decoded_samples[i] =
SOX_SAMPLE_TO_SIGNED_8BIT(sampleBuffer[i], ft->clips);
break;
case 16: p->decoded_samples[i] =
SOX_SAMPLE_TO_SIGNED_16BIT(sampleBuffer[i], ft->clips);
break;
case 24: p->decoded_samples[i] = /* sign extension: */
SOX_SAMPLE_TO_SIGNED_24BIT(sampleBuffer[i],ft->clips) << 8;
p->decoded_samples[i] >>= 8;
break;
case 32: p->decoded_samples[i] =
SOX_SAMPLE_TO_SIGNED_32BIT(sampleBuffer[i],ft->clips);
break;
}
}
FLAC__stream_encoder_process_interleaved(p->encoder, p->decoded_samples, (unsigned) len / ft->signal.channels);
return FLAC__stream_encoder_get_state(p->encoder) == FLAC__STREAM_ENCODER_OK ? len : 0;
}
OggFLAC_API FLAC__StreamEncoderState OggFLAC__seekable_stream_encoder_get_FLAC_stream_encoder_state(const OggFLAC__SeekableStreamEncoder *encoder)
{
FLAC__ASSERT(0 != encoder);
FLAC__ASSERT(0 != encoder->private_);
FLAC__ASSERT(0 != encoder->protected_);
FLAC__ASSERT(0 != encoder->private_->FLAC_stream_encoder);
return FLAC__stream_encoder_get_state(encoder->private_->FLAC_stream_encoder);
}
static int stop_write(sox_format_t * const ft)
{
priv_t * p = (priv_t *)ft->priv;
FLAC__StreamEncoderState state = FLAC__stream_encoder_get_state(p->encoder);
unsigned i;
FLAC__stream_encoder_finish(p->encoder);
FLAC__stream_encoder_delete(p->encoder);
for (i = 0; i < p->num_metadata; ++i)
FLAC__metadata_object_delete(p->metadata[i]);
free(p->decoded_samples);
if (state != FLAC__STREAM_ENCODER_OK) {
lsx_fail_errno(ft, SOX_EINVAL, "FLAC ERROR: failed to encode to end of stream");
return SOX_EOF;
}
return SOX_SUCCESS;
}
int main(int argc, char *argv[])
{
FLAC__bool ok = true;
FLAC__StreamEncoder *encoder = 0;
FLAC__StreamEncoderInitStatus init_status;
FLAC__StreamMetadata *metadata[2];
FLAC__StreamMetadata_VorbisComment_Entry entry;
FILE *fin;
unsigned sample_rate = 0;
unsigned channels = 0;
unsigned bps = 0;
if(argc != 3) {
fprintf(stderr, "usage: %s infile.wav outfile.flac\n", argv[0]);
return 1;
}
if((fin = fopen(argv[1], "rb")) == NULL) {
fprintf(stderr, "ERROR: opening %s for output\n", argv[1]);
return 1;
}
/* read wav header and validate it */
if(
fread(buffer, 1, 44, fin) != 44 ||
memcmp(buffer, "RIFF", 4) ||
memcmp(buffer+8, "WAVEfmt \020\000\000\000\001\000\002\000", 16) ||
memcmp(buffer+32, "\004\000\020\000data", 8)
) {
fprintf(stderr, "ERROR: invalid/unsupported WAVE file, only 16bps stereo WAVE in canonical form allowed\n");
fclose(fin);
return 1;
}
sample_rate = ((((((unsigned)buffer[27] << 8) | buffer[26]) << 8) | buffer[25]) << 8) | buffer[24];
channels = 2;
bps = 16;
total_samples = (((((((unsigned)buffer[43] << 8) | buffer[42]) << 8) | buffer[41]) << 8) | buffer[40]) / 4;
/* allocate the encoder */
if((encoder = FLAC__stream_encoder_new()) == NULL) {
fprintf(stderr, "ERROR: allocating encoder\n");
fclose(fin);
return 1;
}
ok &= FLAC__stream_encoder_set_verify(encoder, true);
ok &= FLAC__stream_encoder_set_compression_level(encoder, 5);
ok &= FLAC__stream_encoder_set_channels(encoder, channels);
ok &= FLAC__stream_encoder_set_bits_per_sample(encoder, bps);
ok &= FLAC__stream_encoder_set_sample_rate(encoder, sample_rate);
ok &= FLAC__stream_encoder_set_total_samples_estimate(encoder, total_samples);
/* now add some metadata; we'll add some tags and a padding block */
if(ok) {
if(
(metadata[0] = FLAC__metadata_object_new(FLAC__METADATA_TYPE_VORBIS_COMMENT)) == NULL ||
(metadata[1] = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)) == NULL ||
/* there are many tag (vorbiscomment) functions but these are convenient for this particular use: */
!FLAC__metadata_object_vorbiscomment_entry_from_name_value_pair(&entry, "ARTIST", "Some Artist") ||
!FLAC__metadata_object_vorbiscomment_append_comment(metadata[0], entry, /*copy=*/false) || /* copy=false: let metadata object take control of entry's allocated string */
!FLAC__metadata_object_vorbiscomment_entry_from_name_value_pair(&entry, "YEAR", "1984") ||
!FLAC__metadata_object_vorbiscomment_append_comment(metadata[0], entry, /*copy=*/false)
) {
fprintf(stderr, "ERROR: out of memory or tag error\n");
ok = false;
}
metadata[1]->length = 1234; /* set the padding length */
ok = FLAC__stream_encoder_set_metadata(encoder, metadata, 2);
}
/* initialize encoder */
if(ok) {
init_status = FLAC__stream_encoder_init_file(encoder, argv[2], progress_callback, /*client_data=*/NULL);
if(init_status != FLAC__STREAM_ENCODER_INIT_STATUS_OK) {
fprintf(stderr, "ERROR: initializing encoder: %s\n", FLAC__StreamEncoderInitStatusString[init_status]);
ok = false;
}
}
/* read blocks of samples from WAVE file and feed to encoder */
if(ok) {
size_t left = (size_t)total_samples;
while(ok && left) {
size_t need = (left>READSIZE? (size_t)READSIZE : (size_t)left);
if(fread(buffer, channels*(bps/8), need, fin) != need) {
fprintf(stderr, "ERROR: reading from WAVE file\n");
ok = false;
}
else {
/* convert the packed little-endian 16-bit PCM samples from WAVE into an interleaved FLAC__int32 buffer for libFLAC */
size_t i;
for(i = 0; i < need*channels; i++) {
/* inefficient but simple and works on big- or little-endian machines */
pcm[i] = (FLAC__int32)(((FLAC__int16)(FLAC__int8)buffer[2*i+1] << 8) | (FLAC__int16)buffer[2*i]);
}
/* feed samples to encoder */
ok = FLAC__stream_encoder_process_interleaved(encoder, pcm, need);
}
left -= need;
}
}
ok &= FLAC__stream_encoder_finish(encoder);
fprintf(stderr, "encoding: %s\n", ok? "succeeded" : "FAILED");
fprintf(stderr, " state: %s\n", FLAC__StreamEncoderStateString[FLAC__stream_encoder_get_state(encoder)]);
/* now that encoding is finished, the metadata can be freed */
FLAC__metadata_object_delete(metadata[0]);
FLAC__metadata_object_delete(metadata[1]);
FLAC__stream_encoder_delete(encoder);
fclose(fin);
return 0;
}
static int output_data(char *buf, int32 nbytes)
{
FLAC__int32 *oggbuf;
FLAC__int16 *s;
int i;
int nch = (dpm.encoding & PE_MONO) ? 1 : 2;
FLAC_ctx *ctx = flac_ctx;
if (dpm.fd < 0)
return 0;
if (ctx == NULL) {
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "FLAC stream is not initialized");
return -1;
}
oggbuf = (FLAC__int32 *)safe_malloc(nbytes * sizeof(FLAC__int32) / nch);
/*
packing 16 -> 32 bit sample
*/
s = (FLAC__int16 *)buf;
for (i = 0; i < nbytes / nch; i++) {
oggbuf[i] = *s++;
}
#ifdef LEGACY_FLAC
#ifdef AU_OGGFLAC
if (flac_options.isogg) {
ctx->state.ogg = OggFLAC__stream_encoder_get_state(ctx->encoder.ogg.stream);
if (ctx->state.ogg != OggFLAC__STREAM_ENCODER_OK) {
if (ctx->state.ogg == OggFLAC__STREAM_ENCODER_FLAC_STREAM_ENCODER_ERROR) {
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "FLAC stream verify error (%s)",
FLAC__StreamDecoderStateString[OggFLAC__stream_encoder_get_verify_decoder_state(ctx->encoder.ogg.stream)]);
}
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "cannot encode OggFLAC stream (%s)",
OggFLAC__StreamEncoderStateString[ctx->state.ogg]);
flac_session_close();
return -1;
}
if (!OggFLAC__stream_encoder_process_interleaved(ctx->encoder.ogg.stream, oggbuf,
nbytes / nch / 2)) {
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "cannot encode OggFLAC stream");
flac_session_close();
return -1;
}
}
else
#endif /* AU_OGGFLAC */
if (flac_options.seekable) {
ctx->state.s_flac = FLAC__seekable_stream_encoder_get_state(ctx->encoder.flac.s_stream);
if (ctx->state.s_flac != FLAC__STREAM_ENCODER_OK) {
if (ctx->state.s_flac == FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR ||
ctx->state.s_flac == FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA) {
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "FLAC stream verify error (%s)",
FLAC__SeekableStreamDecoderStateString[FLAC__seekable_stream_encoder_get_verify_decoder_state(ctx->encoder.flac.s_stream)]);
}
else {
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "cannot encode FLAC stream (%s)",
FLAC__SeekableStreamEncoderStateString[ctx->state.s_flac]);
}
flac_session_close();
return -1;
}
if (!FLAC__seekable_stream_encoder_process_interleaved(ctx->encoder.flac.s_stream, oggbuf,
nbytes / nch / 2 )) {
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "cannot encode FLAC stream");
flac_session_close();
return -1;
}
}
else
{
ctx->state.flac = FLAC__stream_encoder_get_state(ctx->encoder.flac.stream);
if (ctx->state.flac != FLAC__STREAM_ENCODER_OK) {
if (ctx->state.flac == FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR ||
ctx->state.flac == FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA) {
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "FLAC stream verify error (%s)",
FLAC__StreamDecoderStateString[FLAC__stream_encoder_get_verify_decoder_state(ctx->encoder.flac.stream)]);
}
else {
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "cannot encode FLAC stream (%s)",
FLAC__StreamEncoderStateString[ctx->state.flac]);
}
flac_session_close();
return -1;
}
if (!FLAC__stream_encoder_process_interleaved(ctx->encoder.flac.stream, oggbuf,
nbytes / nch / 2 )) {
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "cannot encode FLAC stream");
flac_session_close();
return -1;
}
}
#else /* !LEGACY_FLAC */
ctx->state.flac = FLAC__stream_encoder_get_state(ctx->encoder.flac.stream);
if (ctx->state.flac != FLAC__STREAM_ENCODER_OK) {
if (ctx->state.flac == FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR |
FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA) {
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "FLAC stream verify error (%s)",
FLAC__StreamDecoderStateString[FLAC__stream_encoder_get_verify_decoder_state(ctx->encoder.flac.stream)]);
}
else {
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "cannot encode FLAC stream (%s)",
FLAC__StreamEncoderStateString[ctx->state.flac]);
}
flac_session_close();
return -1;
}
if (!FLAC__stream_encoder_process_interleaved(ctx->encoder.flac.stream, oggbuf,
nbytes / nch / 2 )) {
ctl->cmsg(CMSG_ERROR, VERB_NORMAL, "cannot encode FLAC stream");
flac_session_close();
return -1;
}
#endif
ctx->in_bytes += nbytes;
free(oggbuf);
return 0;
}
static int start_write(sox_format_t * const ft)
{
priv_t * p = (priv_t *)ft->priv;
FLAC__StreamEncoderState status;
unsigned compression_level = MAX_COMPRESSION; /* Default to "best" */
if (ft->encoding.compression != HUGE_VAL) {
compression_level = ft->encoding.compression;
if (compression_level != ft->encoding.compression ||
compression_level > MAX_COMPRESSION) {
lsx_fail_errno(ft, SOX_EINVAL,
"FLAC compression level must be a whole number from 0 to %i",
MAX_COMPRESSION);
return SOX_EOF;
}
}
p->encoder = FLAC__stream_encoder_new();
if (p->encoder == NULL) {
lsx_fail_errno(ft, SOX_ENOMEM, "FLAC ERROR creating the encoder instance");
return SOX_EOF;
}
p->decoded_samples = lsx_malloc(sox_globals.bufsiz * sizeof(FLAC__int32));
p->bits_per_sample = ft->encoding.bits_per_sample;
lsx_report("encoding at %i bits per sample", p->bits_per_sample);
FLAC__stream_encoder_set_channels(p->encoder, ft->signal.channels);
FLAC__stream_encoder_set_bits_per_sample(p->encoder, p->bits_per_sample);
FLAC__stream_encoder_set_sample_rate(p->encoder, (unsigned)(ft->signal.rate + .5));
{ /* Check if rate is streamable: */
static const unsigned streamable_rates[] =
{8000, 16000, 22050, 24000, 32000, 44100, 48000, 96000};
size_t i;
sox_bool streamable = sox_false;
for (i = 0; !streamable && i < array_length(streamable_rates); ++i)
streamable = (streamable_rates[i] == ft->signal.rate);
if (!streamable) {
lsx_report("non-standard rate; output may not be streamable");
FLAC__stream_encoder_set_streamable_subset(p->encoder, sox_false);
}
}
#if FLAC_API_VERSION_CURRENT >= 10
FLAC__stream_encoder_set_compression_level(p->encoder, compression_level);
#else
{
static struct {
unsigned blocksize;
FLAC__bool do_exhaustive_model_search;
FLAC__bool do_mid_side_stereo;
FLAC__bool loose_mid_side_stereo;
unsigned max_lpc_order;
unsigned max_residual_partition_order;
unsigned min_residual_partition_order;
} const options[MAX_COMPRESSION + 1] = {
{1152, sox_false, sox_false, sox_false, 0, 2, 2},
{1152, sox_false, sox_true, sox_true, 0, 2, 2},
{1152, sox_false, sox_true, sox_false, 0, 3, 0},
{4608, sox_false, sox_false, sox_false, 6, 3, 3},
{4608, sox_false, sox_true, sox_true, 8, 3, 3},
{4608, sox_false, sox_true, sox_false, 8, 3, 3},
{4608, sox_false, sox_true, sox_false, 8, 4, 0},
{4608, sox_true, sox_true, sox_false, 8, 6, 0},
{4608, sox_true, sox_true, sox_false, 12, 6, 0},
};
#define SET_OPTION(x) do {\
lsx_report(#x" = %i", options[compression_level].x); \
FLAC__stream_encoder_set_##x(p->encoder, options[compression_level].x);\
} while (0)
SET_OPTION(blocksize);
SET_OPTION(do_exhaustive_model_search);
SET_OPTION(max_lpc_order);
SET_OPTION(max_residual_partition_order);
SET_OPTION(min_residual_partition_order);
if (ft->signal.channels == 2) {
SET_OPTION(do_mid_side_stereo);
SET_OPTION(loose_mid_side_stereo);
}
#undef SET_OPTION
}
#endif
if (ft->signal.length != 0) {
FLAC__stream_encoder_set_total_samples_estimate(p->encoder, (FLAC__uint64)(ft->signal.length / ft->signal.channels));
p->metadata[p->num_metadata] = FLAC__metadata_object_new(FLAC__METADATA_TYPE_SEEKTABLE);
if (p->metadata[p->num_metadata] == NULL) {
lsx_fail_errno(ft, SOX_ENOMEM, "FLAC ERROR creating the encoder seek table template");
return SOX_EOF;
}
{
#if FLAC_API_VERSION_CURRENT >= 8
if (!FLAC__metadata_object_seektable_template_append_spaced_points_by_samples(p->metadata[p->num_metadata], (unsigned)(10 * ft->signal.rate + .5), (FLAC__uint64)(ft->signal.length/ft->signal.channels))) {
#else
size_t samples = 10 * ft->signal.rate;
size_t total_samples = ft->signal.length/ft->signal.channels;
if (!FLAC__metadata_object_seektable_template_append_spaced_points(p->metadata[p->num_metadata], total_samples / samples + (total_samples % samples != 0), (FLAC__uint64)total_samples)) {
#endif
lsx_fail_errno(ft, SOX_ENOMEM, "FLAC ERROR creating the encoder seek table points");
return SOX_EOF;
}
}
p->metadata[p->num_metadata]->is_last = sox_false; /* the encoder will set this for us */
++p->num_metadata;
}
if (ft->oob.comments) { /* Make the comment structure */
FLAC__StreamMetadata_VorbisComment_Entry entry;
int i;
p->metadata[p->num_metadata] = FLAC__metadata_object_new(FLAC__METADATA_TYPE_VORBIS_COMMENT);
for (i = 0; ft->oob.comments[i]; ++i) {
static const char prepend[] = "Comment=";
char * text = lsx_calloc(strlen(prepend) + strlen(ft->oob.comments[i]) + 1, sizeof(*text));
/* Prepend `Comment=' if no field-name already in the comment */
if (!strchr(ft->oob.comments[i], '='))
strcpy(text, prepend);
entry.entry = (FLAC__byte *) strcat(text, ft->oob.comments[i]);
entry.length = strlen(text);
FLAC__metadata_object_vorbiscomment_append_comment(p->metadata[p->num_metadata], entry, /*copy= */ sox_true);
free(text);
}
++p->num_metadata;
}
if (p->num_metadata)
FLAC__stream_encoder_set_metadata(p->encoder, p->metadata, p->num_metadata);
#if FLAC_API_VERSION_CURRENT <= 7
FLAC__stream_encoder_set_write_callback(p->encoder, flac_stream_encoder_write_callback);
FLAC__stream_encoder_set_metadata_callback(p->encoder, flac_stream_encoder_metadata_callback);
FLAC__stream_encoder_set_client_data(p->encoder, ft);
status = FLAC__stream_encoder_init(p->encoder);
#else
status = FLAC__stream_encoder_init_stream(p->encoder, flac_stream_encoder_write_callback,
flac_stream_encoder_seek_callback, flac_stream_encoder_tell_callback, flac_stream_encoder_metadata_callback, ft);
#endif
if (status != FLAC__STREAM_ENCODER_OK) {
lsx_fail_errno(ft, SOX_EINVAL, "%s", FLAC__StreamEncoderStateString[status]);
return SOX_EOF;
}
return SOX_SUCCESS;
}
static size_t write_samples(sox_format_t * const ft, sox_sample_t const * const sampleBuffer, size_t const len)
{
priv_t * p = (priv_t *)ft->priv;
unsigned i;
for (i = 0; i < len; ++i) {
long pcm = SOX_SAMPLE_TO_SIGNED_32BIT(sampleBuffer[i], ft->clips);
p->decoded_samples[i] = pcm >> (32 - p->bits_per_sample);
switch (p->bits_per_sample) {
case 8: p->decoded_samples[i] =
SOX_SAMPLE_TO_SIGNED_8BIT(sampleBuffer[i], ft->clips);
break;
case 16: p->decoded_samples[i] =
SOX_SAMPLE_TO_SIGNED_16BIT(sampleBuffer[i], ft->clips);
break;
case 24: p->decoded_samples[i] = /* sign extension: */
SOX_SAMPLE_TO_SIGNED_24BIT(sampleBuffer[i],ft->clips) << 8;
p->decoded_samples[i] >>= 8;
break;
case 32: p->decoded_samples[i] =
SOX_SAMPLE_TO_SIGNED_32BIT(sampleBuffer[i],ft->clips);
break;
}
}
FLAC__stream_encoder_process_interleaved(p->encoder, p->decoded_samples, (unsigned) len / ft->signal.channels);
return FLAC__stream_encoder_get_state(p->encoder) == FLAC__STREAM_ENCODER_OK ? len : 0;
}
ACFLACEncoder::ACFLACEncoder(OSType theSubType)
:
ACFLACCodec(kInputBufferPackets * kFramesPerPacket * sizeof(SInt16), theSubType)
{
// This encoder only accepts (16- or 24-bit) native endian signed integers as it's input,
// but can handle any sample rate and any number of channels
CAStreamBasicDescription theInputFormat1(kAudioStreamAnyRate, kAudioFormatLinearPCM, 0, 1, 0, 0, 16, kAudioFormatFlagsNativeEndian | kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked);
AddInputFormat(theInputFormat1);
CAStreamBasicDescription theInputFormat2(kAudioStreamAnyRate, kAudioFormatLinearPCM, 0, 1, 0, 0, 24, kAudioFormatFlagsNativeEndian | kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked);
AddInputFormat(theInputFormat2);
// These are some additional formats that FLAC can support
//CAStreamBasicDescription theInputFormat3(kAudioStreamAnyRate, kAudioFormatLinearPCM, 0, 1, 0, 0, 32, kAudioFormatFlagsNativeEndian | kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked);
//AddInputFormat(theInputFormat3);
//CAStreamBasicDescription theInputFormat4(kAudioStreamAnyRate, kAudioFormatLinearPCM, 0, 1, 0, 0, 20, kAudioFormatFlagsNativeEndian | kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsAlignedHigh);
//AddInputFormat(theInputFormat4);
// set our intial input format to stereo 32 bit native endian signed integer at a 44100 sample rate
mInputFormat.mSampleRate = 44100;
mInputFormat.mFormatID = kAudioFormatLinearPCM;
mInputFormat.mFormatFlags = kAudioFormatFlagsNativeEndian | kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked;
mInputFormat.mBytesPerPacket = 4;
mInputFormat.mFramesPerPacket = 1;
mInputFormat.mBytesPerFrame = 4;
mInputFormat.mChannelsPerFrame = 2;
mInputFormat.mBitsPerChannel = 16;
// This encoder only puts out a FLAC stream
CAStreamBasicDescription theOutputFormat1(kAudioStreamAnyRate, kAudioFormatFLAC, 0, kFramesPerPacket, 0, 0, 0, 0);
AddOutputFormat(theOutputFormat1);
// set our intial output format to stereo FLAC at a 44100 sample rate -- note however the 16 bit bit depth
mOutputFormat.mSampleRate = 44100;
mOutputFormat.mFormatFlags = kFLACFormatFlag_16BitSourceData;
mOutputFormat.mBytesPerPacket = 0;
mOutputFormat.mFramesPerPacket = kFramesPerPacket;
mOutputFormat.mFormatID = kAudioFormatFLAC;
mOutputFormat.mBytesPerFrame = 0;
mOutputFormat.mChannelsPerFrame = 2;
mOutputFormat.mBitsPerChannel = 0;
mSupportedChannelTotals[0] = 1;
mSupportedChannelTotals[1] = 2;
mSupportedChannelTotals[2] = 3;
mSupportedChannelTotals[3] = 4;
mSupportedChannelTotals[4] = 5;
mSupportedChannelTotals[5] = 6;
mSupportedChannelTotals[6] = 7;
mSupportedChannelTotals[7] = 8;
mPacketInInputBuffer = false;
mFormat = 0;
mTotalBytesGenerated = 0;
mQuality = 0; // Compression Quality
mInputBufferBytesUsed = 0;
mFlushPacket = false;
mFinished = false;
mTrailingFrames = 0;
mBitDepth = 16;
mEncoder = FLAC__stream_encoder_new();
mEncoderState = FLAC__stream_encoder_get_state(mEncoder);
}
