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fix non precoded wav file playing; use 5min wave particle lecture as demo

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pstruebi
2025-07-08 14:38:49 +02:00
parent b4e53917b3
commit 8307e1cdec
2 changed files with 43 additions and 34 deletions
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54
src/auracast/multicast.py
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@@ -520,28 +520,29 @@ class Streamer():
if pcm_format.channels != 1:
logging.info("Input device provides %d channels – will down-mix to mono for LC3", pcm_format.channels)
if pcm_format.sample_type == audio_io.PcmFormat.SampleType.INT16:
pcm_bit_depth = 16
elif pcm_format.sample_type == audio_io.PcmFormat.SampleType.FLOAT32:
pcm_bit_depth = None
else:
logging.error("Only INT16 and FLOAT32 sample types are supported")
return
encoder = lc3.Encoder(
frame_duration_us=global_config.frame_duration_us,
sample_rate_hz=global_config.auracast_sampling_rate_hz,
num_channels=1,
input_sample_rate_hz=pcm_format.sample_rate,
)
lc3_frame_samples = encoder.get_frame_samples() # number of the pcm samples per lc3 frame
big['pcm_bit_depth'] = pcm_bit_depth
big['channels'] = pcm_format.channels
big['lc3_frame_samples'] = lc3_frame_samples
big['lc3_bytes_per_frame'] = global_config.octets_per_frame
big['audio_input'] = audio_input
big['encoder'] = encoder
big['precoded'] = False
if pcm_format.sample_type == audio_io.PcmFormat.SampleType.INT16:
pcm_bit_depth = 16
elif pcm_format.sample_type == audio_io.PcmFormat.SampleType.FLOAT32:
pcm_bit_depth = None
else:
logging.error("Only INT16 and FLOAT32 sample types are supported")
return
encoder = lc3.Encoder(
frame_duration_us=global_config.frame_duration_us,
sample_rate_hz=global_config.auracast_sampling_rate_hz,
num_channels=1,
input_sample_rate_hz=pcm_format.sample_rate,
)
lc3_frame_samples = encoder.get_frame_samples() # number of the pcm samples per lc3 frame
big['pcm_bit_depth'] = pcm_bit_depth
big['channels'] = pcm_format.channels
big['lc3_frame_samples'] = lc3_frame_samples
big['lc3_bytes_per_frame'] = global_config.octets_per_frame
big['audio_input'] = audio_input
big['encoder'] = encoder
big['precoded'] = False
logging.info("Streaming audio...")
@@ -551,7 +552,6 @@ class Streamer():
while self.is_streaming:
stream_finished = [False for _ in range(len(bigs))]
for i, big in enumerate(bigs.values()):
if big['precoded']:# everything was already lc3 coded beforehand
lc3_frame = bytes(
itertools.islice(big['lc3_frames'], big['lc3_bytes_per_frame'])
@@ -642,7 +642,7 @@ if __name__ == "__main__":
bigs = [
auracast_config.AuracastBigConfigDeu(),
auracast_config.AuracastBigConfigEng(),
#auracast_config.AuracastBigConfigFra(),
auracast_config.AuracastBigConfigFra(),
#auracast_config.AuracastBigConfigEs(),
#auracast_config.AuracastBigConfigIt(),
]
@@ -656,15 +656,15 @@ if __name__ == "__main__":
#config.transport='serial:/dev/serial/by-id/usb-SEGGER_J-Link_001057705357-if02,1000000,rtscts' # transport for nrf54l15dk
#config.transport='serial:/dev/serial/by-id/usb-ZEPHYR_Zephyr_HCI_UART_sample_95A087EADB030B24-if00,115200,rtscts' #nrf52dongle hci_uart usb cdc
#config.transport='usb:2fe3:000b' #nrf52dongle hci_usb # TODO: iso packet over usb not supported
# config.transport= 'auto'
config.transport='serial:/dev/ttyAMA3,1000000,rtscts' # transport for raspberry pi
config.transport= 'auto'
#config.transport='serial:/dev/ttyAMA3,1000000,rtscts' # transport for raspberry pi
# TODO: encrypted streams are not working
for big in config.bigs:
#big.code = 'ff'*16 # returns hci/HCI_ENCRYPTION_MODE_NOT_ACCEPTABLE_ERROR
#big.code = '78 e5 dc f1 34 ab 42 bf c1 92 ef dd 3a fd 67 ae'
big.precode_wav = True
big.precode_wav = False
#big.audio_source = big.audio_source.replace('.wav', '_10_16_32.lc3') #lc3 precoded files
#big.audio_source = read_lc3_file(big.audio_source) # load files in advance