sockaudio.py thx boatbod
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@ -2,6 +2,8 @@
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# Copyright 2017 Graham Norbury
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#
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# Copyright 2011, 2012, 2013, 2014, 2015, 2016, 2017 Max H. Parke KA1RBI
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#
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# This file is part of OP25
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#
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# OP25 is free software; you can redistribute it and/or modify it
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@ -28,7 +30,7 @@ import errno
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# OP25 defaults
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PCM_RATE = 8000 # audio sample rate (Hz)
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PCM_BUFFER_SIZE = 2000 # size of ALSA buffer in frames
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PCM_BUFFER_SIZE = 4000 # size of ALSA buffer in frames
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MAX_SUPERFRAME_SIZE = 320 # maximum size of incoming UDP audio buffer
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@ -128,7 +130,7 @@ class alsasound(object):
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self.format = pcm_format
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self.channels = pcm_channels
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self.rate = pcm_rate
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pcm_start_threshold = int(pcm_buffer_size * 0.75)
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pcm_buf_sz = c_ulong(pcm_buffer_size)
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c_pars = (c_void_p * int(self.libasound.snd_pcm_hw_params_sizeof() / sizeof(c_void_p)))()
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err = self.libasound.snd_pcm_hw_params_any(self.c_pcm, c_pars)
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@ -136,40 +138,43 @@ class alsasound(object):
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sys.stderr.write("hw_params_any failed: %d\n" % err)
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return err
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err = self.libasound.snd_pcm_hw_params_set_access(self.c_pcm, c_pars, SND_PCM_ACCESS_RW_INTERLEAVED);
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err = self.libasound.snd_pcm_hw_params_set_access(self.c_pcm, c_pars, SND_PCM_ACCESS_RW_INTERLEAVED)
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if err < 0:
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sys.stderr.write("set_access failed: %d\n" % err)
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return err
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err = self.libasound.snd_pcm_hw_params_set_format(self.c_pcm, c_pars, c_uint(self.format));
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err = self.libasound.snd_pcm_hw_params_set_format(self.c_pcm, c_pars, c_uint(self.format))
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if err < 0:
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sys.stderr.write("set_format failed: %d\n" % err)
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return err
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err = self.libasound.snd_pcm_hw_params_set_channels(self.c_pcm, c_pars, c_uint(self.channels));
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err = self.libasound.snd_pcm_hw_params_set_channels(self.c_pcm, c_pars, c_uint(self.channels))
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if err < 0:
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sys.stderr.write("set_channels failed: %d\n" % err)
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return err
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err = self.libasound.snd_pcm_hw_params_set_rate(self.c_pcm, c_pars, c_uint(self.rate), c_int(0));
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err = self.libasound.snd_pcm_hw_params_set_rate(self.c_pcm, c_pars, c_uint(self.rate), c_int(0))
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if err < 0:
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sys.stderr.write("set_rate failed: %d\n" % err)
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return err
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err = 0 ########self.libasound.snd_pcm_hw_params_set_buffer_size(self.c_pcm, c_pars, c_ulong(pcm_buffer_size), c_int(0));
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err = self.libasound.snd_pcm_hw_params_set_buffer_size_near(self.c_pcm, c_pars, byref(pcm_buf_sz))
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if err < 0:
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sys.stderr.write("set_buffer_size failed: %d\n" % err)
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sys.stderr.write("set_buffer_size_near failed: %d\n" % err)
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return err
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err = self.libasound.snd_pcm_hw_params(self.c_pcm, c_pars);
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if pcm_buf_sz.value != pcm_buffer_size:
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sys.stderr.write("set_buffer_size_near requested %d, but returned %d\n" % (pcm_buffer_size, pcm_buf_sz.value))
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err = self.libasound.snd_pcm_hw_params(self.c_pcm, c_pars)
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if err < 0:
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sys.stderr.write("hw_params failed: %d\n" % err)
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return err
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self.libasound.snd_pcm_hw_params_current(self.c_pcm, c_pars)
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c_bits = self.libasound.snd_pcm_hw_params_get_sbits(c_pars)
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self.framesize = self.channels * c_bits/8;
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self.framesize = self.channels * c_bits/8
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c_sw_pars = (c_void_p * int(self.libasound.snd_pcm_sw_params_sizeof() / sizeof(c_void_p)))()
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err = self.libasound.snd_pcm_sw_params_current(self.c_pcm, c_sw_pars)
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if err < 0:
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sys.stderr.write("get_sw_params_current failed: %d\n" % err)
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return err
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pcm_start_threshold = int(pcm_buf_sz.value * 0.75)
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err = self.libasound.snd_pcm_sw_params_set_start_threshold(self.c_pcm, c_sw_pars, c_uint(pcm_start_threshold))
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if err < 0:
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sys.stderr.write("set_sw_params_start_threshold failed: %d\n" % err)
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@ -197,7 +202,7 @@ class alsasound(object):
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if (ret < 0):
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if (ret == -errno.EPIPE): # underrun
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if (LOG_AUDIO_XRUNS):
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sys.stderr.write("[%f] PCM underrun\n" % time.time())
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sys.stderr.write("%f PCM underrun\n" % time.time())
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ret = self.libasound.snd_pcm_recover(self.c_pcm, ret, 1)
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if (ret >= 0):
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ret = self.libasound.snd_pcm_writei(self.c_pcm, cast(c_data, POINTER(c_void_p)), n_frames)
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@ -227,6 +232,16 @@ class alsasound(object):
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time.sleep(1)
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ret = self.libasound.snd_pcm_prepare(self.c_pcm)
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def drop(self):
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ret = self.libasound.snd_pcm_drop(self.c_pcm)
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if (ret == -errno.ESTRPIPE): # suspended
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while True:
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ret = self.libasound.snd_pcm_resume(self.c_pcm)
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if (ret != -errno.EAGAIN):
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break
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time.sleep(1)
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ret = self.libasound.snd_pcm_prepare(self.c_pcm)
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def dump(self):
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if (self.c_pcm.value == None):
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return
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@ -264,6 +279,8 @@ class socket_audio(threading.Thread):
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flag = ord(d[0][0]) + (ord(d[0][1]) << 8) # 16 bit little endian
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if (flag == 0): # 0x0000 = drain pcm buffer
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self.pcm.drain()
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elif (flag == 1): # 0x0001 = flush pcm buffer
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self.pcm.drop()
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else: # audio data
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self.pcm.write(d[0])
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else:
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@ -280,7 +297,6 @@ class socket_audio(threading.Thread):
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def setup_socket(self, udp_host, udp_port):
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self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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self.sock.bind((udp_host, udp_port))
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sys.stderr.write('setup_socket: %d\n' % udp_port)
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return
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def close_socket(self):
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