static int oss_write(const char *buffer, int count)
{
int rc;
count -= count % sf_get_frame_size(oss_sf);
rc = write(oss_fd, buffer, count);
return rc;
}
static int op_roar_buffer_space(void)
{
ssize_t ret;
int i;
int fs = sf_get_frame_size(format);
for (i = 0; i < 8; i++)
roar_vs_iterate(vss, ROAR_VS_NOWAIT, NULL);
ret = roar_vs_get_avail_write(vss, &err);
ret -= ret % fs;
return ret;
}
static int waveout_open(sample_format_t sf)
{
WAVEFORMATEX format;
int rc, i;
/* WAVEFORMATEX does not support channels > 2, waveOutWrite() wants little endian signed PCM */
if (sf_get_bigendian(sf) || !sf_get_signed(sf) || sf_get_channels(sf) > 2) {
return -OP_ERROR_SAMPLE_FORMAT;
}
memset(&format, 0, sizeof(format));
format.cbSize = sizeof(format);
format.wFormatTag = WAVE_FORMAT_PCM;
format.nChannels = sf_get_channels(sf);
format.nSamplesPerSec = sf_get_rate(sf);
format.wBitsPerSample = sf_get_bits(sf);
format.nAvgBytesPerSec = sf_get_second_size(sf);
format.nBlockAlign = sf_get_frame_size(sf);
if ((rc = waveOutOpen(&wave_out, WAVE_MAPPER, &format, 0, 0, CALLBACK_NULL)) != MMSYSERR_NOERROR) {
switch (rc) {
case MMSYSERR_ALLOCATED:
errno = EBUSY;
return -OP_ERROR_ERRNO;
case MMSYSERR_BADDEVICEID:
case MMSYSERR_NODRIVER:
errno = ENODEV;
return -OP_ERROR_ERRNO;
case MMSYSERR_NOMEM:
errno = ENOMEM;
return -OP_ERROR_ERRNO;
case WAVERR_BADFORMAT:
return -OP_ERROR_SAMPLE_FORMAT;
}
return -OP_ERROR_INTERNAL;
}
/* reset buffers */
for (i = 0; i < buffer_count; i++) {
buffers[i].dwFlags = 0;
}
buffer_idx = 0;
buffers_free = buffer_count;
waveout_sf = sf;
return 0;
}
static int op_jack_buffer_space(void)
{
if (fail) {
op_jack_exit();
return -OP_ERROR_INTERNAL;
}
int bytes = jack_ringbuffer_write_space(ringbuffer[0]);
for (int c = 1; c < CHANNELS; c++) {
int tmp = jack_ringbuffer_write_space(ringbuffer[0]);
if (bytes > tmp) {
bytes = tmp;
}
}
int frames = bytes / sizeof(jack_default_audio_sample_t);
int frame_size = sf_get_frame_size(sample_format);
#ifdef HAVE_SAMPLERATE
return (int) ((float) (frames) / resample_ratio) * frame_size;
#else
return frames * frame_size;
#endif
}
AudioObjectSetPropertyData(dev_id,
&aopa,
0, NULL, layout_size, layout);
if (err != noErr)
d_print("Cannot set the channel layout successfully.\n");
free(layout);
}
static AudioStreamBasicDescription coreaudio_fill_format_description(sample_format_t sf)
{
AudioStreamBasicDescription desc = {
.mSampleRate = (Float64)sf_get_rate(sf),
.mFormatID = kAudioFormatLinearPCM,
.mFormatFlags = kAudioFormatFlagIsPacked,
.mBytesPerPacket = sf_get_frame_size(sf),
.mFramesPerPacket = 1,
.mChannelsPerFrame = sf_get_channels(sf),
.mBitsPerChannel = sf_get_bits(sf),
.mBytesPerFrame = sf_get_frame_size(sf),
};
d_print("Bits:%d\n", sf_get_bits(sf));
if (sf_get_bigendian(sf))
desc.mFormatFlags |= kAudioFormatFlagIsBigEndian;
if (sf_get_signed(sf))
desc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
return desc;
}
static int op_jack_write(const char *buffer, int count)
{
if (fail) {
op_jack_exit();
return -OP_ERROR_INTERNAL;
}
if (!drop_done) {
return 0;
}
int frame_size = sf_get_frame_size(sample_format);
int channels = sf_get_channels(sample_format);
size_t frames = count / frame_size;
/* since this is the only place where the ringbuffers get
* written, available space will only grow, therefore frames_min
* is safe.
*/
size_t frames_min = SIZE_MAX;
for (int c = 0; c < CHANNELS; c++) {
size_t frames_available = jack_ringbuffer_write_space(ringbuffer[c]) / sizeof(jack_default_audio_sample_t);
if (frames_available < frames_min) {
frames_min = frames_available;
}
}
if (frames > frames_min) {
frames = frames_min;
}
jack_default_audio_sample_t buf[CHANNELS][buffer_size];
/* demux and convert to float */
for (int pos = 0; pos < count; ) {
int frame = pos / frame_size;
for (int c = 0; c < channels; c++) {
int idx = pos + c * sample_bytes;
/* for now, only 2 channels and mono are supported */
if (channel_map[c] == CHANNEL_POSITION_LEFT || channel_map[c] == CHANNEL_POSITION_MONO) {
buf[0][frame] = read_sample(&buffer[idx]);
} else if (channel_map[c] == CHANNEL_POSITION_RIGHT || channel_map[c] == CHANNEL_POSITION_MONO) {
buf[1][frame] = read_sample(&buffer[idx]);
}
}
pos += frame_size;
}
#ifdef HAVE_SAMPLERATE
if (resample_ratio > 1.01f || resample_ratio < 0.99) {
jack_default_audio_sample_t converted[buffer_size];
SRC_DATA src_data;
for (int c = 0; c < CHANNELS; c++) {
src_data.data_in = buf[c];
src_data.data_out = converted;
src_data.input_frames = frames;
src_data.output_frames = frames_min;
src_data.src_ratio = resample_ratio;
src_data.end_of_input = 0;
int err = src_process(src_state[c], &src_data);
if (err) {
d_print("libsamplerate err %s\n", src_strerror(err));
}
int byte_length = src_data.output_frames_gen * sizeof(jack_default_audio_sample_t);
jack_ringbuffer_write(ringbuffer[c], (const char*) converted, byte_length);
}
return src_data.input_frames_used * frame_size;
} else {
#endif
int byte_length = frames * sizeof(jack_default_audio_sample_t);
for (int c = 0; c < CHANNELS; c++) {
jack_ringbuffer_write(ringbuffer[c], (const char*) buf[c], byte_length);
}
return frames * frame_size;
#ifdef HAVE_SAMPLERATE
}
#endif
}
