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Add support for broadcasting other sound files

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Brandon Skari
2016-01-19 04:28:12 +07:00
parent 4634b2ffd2
commit 19a1aa2578
2 changed files with 4 additions and 13 deletions
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6
src/python/_rpitxmodule.c
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@@ -12,6 +12,7 @@ static void* sampleBase;
static sf_count_t sampleLength;
static sf_count_t sampleOffset;
static SNDFILE* sndFile;
static int bitRate;
// These methods used by libsndfile's virtual file open function
@@ -65,13 +66,13 @@ static ssize_t formatRfWrapper(void* const outBuffer, const size_t count) {
const int excursion = 6000;
int numBytesWritten = 0;
samplerf_t samplerf;
samplerf.waitForThisSample = 1e9 / ((float)bitRate); //en 100 de nanosecond
char* const out = outBuffer;
while (numBytesWritten < count) {
for (; numBytesWritten <= count - sizeof(samplerf_t) && wavOffset < wavFilled; ++wavOffset) {
const float x = wavBuffer[wavOffset];
samplerf.frequency = x * excursion * 2.0;
samplerf.waitForThisSample = 1e9 / 48000.0; //en 100 de nanosecond
memcpy(&out[numBytesWritten], &samplerf, sizeof(samplerf_t));
numBytesWritten += sizeof(samplerf_t);
}
@@ -117,8 +118,9 @@ _rpitx_broadcast_fm(PyObject* self, PyObject* args) {
fprintf(stderr, "Unable to open sound file: %s\n", sf_strerror(sndFile));
Py_RETURN_NONE;
}
bitRate = sfInfo.samplerate;
pitx_run(MODE_RF, 48000, frequency * 1000.0, 0.0, 0, formatRfWrapper, reset);
pitx_run(MODE_RF, bitRate, frequency * 1000.0, 0.0, 0, formatRfWrapper, reset);
sf_close(sndFile);
Py_RETURN_NONE;

11
src/python/rpitx.py
View File

@@ -26,15 +26,6 @@ def broadcast_fm(file_, frequency):
left, right = original.split_to_mono()
original = left.overlay(right)
if (
original.frame_rate != 48000
# TODO: There should be a better way to check if it's wav
or not file_name.endswith('.wav')
):
logger.debug('Reencoding file')
reencoded = StringIO.StringIO()
return AudioSegment.from_file(reencoded)
return original
raw_audio_data = _reencode(file_)
@@ -49,7 +40,5 @@ def broadcast_fm(file_, frequency):
raw_array = array.array('c')
raw_array.fromstring(wav_data.getvalue())
#with open('sampleaudio.wav', 'rb') as file_:
# raw_array.fromstring(file_.read())
array_address, length = raw_array.buffer_info()
_rpitx.broadcast_fm(array_address, length, frequency)