diff options
Diffstat (limited to 'Alc/pulseaudio.c')
| -rw-r--r-- | Alc/pulseaudio.c | 475 |
1 files changed, 475 insertions, 0 deletions
diff --git a/Alc/pulseaudio.c b/Alc/pulseaudio.c new file mode 100644 index 00000000..85a82762 --- /dev/null +++ b/Alc/pulseaudio.c @@ -0,0 +1,475 @@ +/** + * OpenAL cross platform audio library + * Copyright (C) 2009 by Konstantinos Natsakis <[email protected]> + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + * Or go to http://www.gnu.org/copyleft/lgpl.html + */ + +#include "config.h" + +#include "alMain.h" + +#include <pulse/pulseaudio.h> + +#if PA_API_VERSION == 11 +#define PA_STREAM_ADJUST_LATENCY 0x2000U +static inline int PA_STREAM_IS_GOOD(pa_stream_state_t x) +{ + return (x == PA_STREAM_CREATING || x == PA_STREAM_READY); +} +static inline int PA_CONTEXT_IS_GOOD(pa_context_state_t x) +{ + return (x == PA_CONTEXT_CONNECTING || x == PA_CONTEXT_AUTHORIZING || + x == PA_CONTEXT_SETTING_NAME || x == PA_CONTEXT_READY); +} +#define PA_STREAM_IS_GOOD PA_STREAM_IS_GOOD +#define PA_CONTEXT_IS_GOOD PA_CONTEXT_IS_GOOD +#elif PA_API_VERSION != 12 +#error Invalid PulseAudio API version +#endif + +typedef struct { + ALCdevice *device; + + ALCenum format; + ALCuint samples; + ALCuint frequency; + ALCuint frame_size; + + RingBuffer *ring; + + pa_buffer_attr attr; + pa_sample_spec spec; + + char path_name[PATH_MAX]; + const char *context_name; + const char *stream_name; + + pa_threaded_mainloop *loop; + + pa_stream *stream; + pa_context *context; +} pulse_data; + +static char *pulse_device; +static char *pulse_capture_device; + +// PulseAudio Event Callbacks {{{ +static void stream_state_callback(pa_stream *stream, void *pdata) //{{{ +{ + pulse_data *data = pdata; + + switch(pa_stream_get_state(stream)) + { + case PA_STREAM_READY: + AL_PRINT("%s: %s ready!\n", data->context_name, data->stream_name); + break; + + case PA_STREAM_FAILED: + AL_PRINT("%s: %s: Connection failed: %s\n", data->context_name, + data->stream_name, pa_strerror(pa_context_errno(data->context))); + break; + + case PA_STREAM_TERMINATED: + AL_PRINT("%s: %s terminated!\n", data->context_name, data->stream_name); + break; + + default: + break; + } + + pa_threaded_mainloop_signal(data->loop, 1); +} //}}} + +static void context_state_callback(pa_context *context, void *pdata) //{{{ +{ + pulse_data *data = pdata; + + switch(pa_context_get_state(context)) + { + case PA_CONTEXT_READY: + AL_PRINT("%s ready!\n", data->context_name); + break; + + case PA_CONTEXT_FAILED: + AL_PRINT("%s: Connection failed: %s\n", data->context_name, + pa_strerror(pa_context_errno(context))); + break; + + case PA_CONTEXT_TERMINATED: + AL_PRINT("%s terminated!\n", data->context_name); + break; + + default: + break; + } + + pa_threaded_mainloop_signal(data->loop, 1); +} //}}} +//}}} + +// PulseAudio I/O Callbacks //{{{ +static void stream_write_callback(pa_stream *stream, size_t len, void *pdata) //{{{ +{ + ALCdevice *Device = pdata; + void *buf = pa_xmalloc0(len); + + SuspendContext(NULL); + aluMixData(Device->Context, buf, len, Device->Format); + ProcessContext(NULL); + + pa_stream_write(stream, buf, len, pa_xfree, 0, PA_SEEK_RELATIVE); +} //}}} + +static void stream_read_callback(pa_stream *stream, size_t length, void *pdata) //{{{ +{ + ALCdevice *Device = pdata; + pulse_data *data = Device->ExtraData; + const void *buf; + + if(pa_stream_peek(stream, &buf, &length) < 0) + { + AL_PRINT("pa_stream_peek() failed: %s\n", + pa_strerror(pa_context_errno(data->context))); + return; + } + + assert(buf); + assert(length); + + length /= data->frame_size; + + if(data->samples < length) + AL_PRINT("stream_read_callback: buffer overflow!\n"); + + WriteRingBuffer(data->ring, buf, (length<data->samples) ? length : data->samples); + + pa_stream_drop(stream); +} //}}} +//}}} + +static ALCboolean pulse_open(ALCdevice *device, ALCchar *device_name, ALCenum format, ALCuint samples, ALCuint frequency) //{{{ +{ + pulse_data *data = pa_xmalloc0(sizeof(pulse_data)); + + data->device = device; + data->format = format; + data->samples = samples; + data->frequency = frequency; + data->frame_size = aluBytesFromFormat(format) * aluChannelsFromFormat(format); + + if(pa_get_binary_name(data->path_name, sizeof(data->path_name))) + data->context_name = pa_path_get_filename(data->path_name); + else + data->context_name = "OpenAL Soft"; + + if(!(data->ring = CreateRingBuffer(data->frame_size, data->samples))) + { + pa_xfree(data); + return ALC_FALSE; + } + + device->ExtraData = data; + device->szDeviceName = device_name; + + data->attr.minreq = -1; + data->attr.prebuf = -1; + data->attr.maxlength = -1; + + if(device->IsCaptureDevice) + { + data->attr.tlength = -1; + data->attr.fragsize = data->frame_size * data->samples / 2; + data->stream_name = "Capture Stream"; + } + else + { + data->attr.tlength = data->frame_size * (device->UpdateSize&~3); + data->attr.fragsize = -1; + data->stream_name = "Playback Stream"; + } + + data->spec.rate = data->frequency; + data->spec.channels = aluChannelsFromFormat(data->format); + + switch(aluBytesFromFormat(data->format)) + { + case 1: + data->spec.format = PA_SAMPLE_U8; + break; + case 2: + data->spec.format = PA_SAMPLE_S16NE; + break; + default: + AL_PRINT("Unknown format: %x\n", data->format); + goto out2; + } + + if(pa_sample_spec_valid(&data->spec) == 0) + { + AL_PRINT("Invalid sample format\n"); + goto out2; + } + + if(!(data->loop = pa_threaded_mainloop_new())) + { + AL_PRINT("pa_threaded_mainloop_new() failed!\n"); + goto out2; + } + + if(pa_threaded_mainloop_start(data->loop) < 0) + { + AL_PRINT("pa_threaded_mainloop_start() failed\n"); + goto out3; + } + + pa_threaded_mainloop_lock(data->loop); + + data->context = pa_context_new(pa_threaded_mainloop_get_api(data->loop), data->context_name); + if(!data->context) + { + AL_PRINT("pa_context_new() failed: %s\n", + pa_strerror(pa_context_errno(data->context))); + + pa_threaded_mainloop_unlock(data->loop); + goto out3; + } + + pa_context_set_state_callback(data->context, context_state_callback, data); + + if(pa_context_connect(data->context, NULL, 0, NULL) < 0) + { + AL_PRINT("Context did not connect: %s\n", + pa_strerror(pa_context_errno(data->context))); + + pa_context_unref(data->context); + pa_threaded_mainloop_unlock(data->loop); + + data->context = NULL; + goto out3; + } + + while(pa_context_get_state(data->context) != PA_CONTEXT_READY) + { + if(!PA_CONTEXT_IS_GOOD(pa_context_get_state(data->context))) + { + pa_context_unref(data->context); + pa_threaded_mainloop_unlock(data->loop); + + data->context = NULL; + goto out3; + } + + pa_threaded_mainloop_wait(data->loop); + pa_threaded_mainloop_accept(data->loop); + } + + data->stream = pa_stream_new(data->context, data->stream_name, &data->spec, NULL); + if(!data->stream) + { + AL_PRINT("pa_stream_new() failed: %s\n", + pa_strerror(pa_context_errno(data->context))); + + pa_threaded_mainloop_unlock(data->loop); + goto out4; + } + + pa_stream_set_state_callback(data->stream, stream_state_callback, data); + + if(device->IsCaptureDevice) + { + if(pa_stream_connect_record(data->stream, NULL, &data->attr, PA_STREAM_ADJUST_LATENCY) < 0) + { + AL_PRINT("Stream did not connect: %s\n", + pa_strerror(pa_context_errno(data->context))); + + pa_stream_unref(data->stream); + pa_threaded_mainloop_unlock(data->loop); + + data->stream = NULL; + goto out4; + } + } + else + { + pa_stream_set_write_callback(data->stream, stream_write_callback, device); + + if(pa_stream_connect_playback(data->stream, NULL, &data->attr, PA_STREAM_ADJUST_LATENCY, NULL, NULL) < 0) + { + AL_PRINT("Stream did not connect: %s\n", + pa_strerror(pa_context_errno(data->context))); + + pa_stream_unref(data->stream); + pa_threaded_mainloop_unlock(data->loop); + + data->stream = NULL; + goto out4; + } + } + + while(pa_stream_get_state(data->stream) != PA_STREAM_READY) + { + if(!PA_STREAM_IS_GOOD(pa_stream_get_state(data->stream))) + { + pa_stream_unref(data->stream); + pa_threaded_mainloop_unlock(data->loop); + + data->stream = NULL; + goto out4; + } + + pa_threaded_mainloop_wait(data->loop); + pa_threaded_mainloop_accept(data->loop); + } + + device->UpdateSize /= 4; + pa_threaded_mainloop_unlock(data->loop); + + return ALC_TRUE; + +out4: + pa_threaded_mainloop_lock(data->loop); + + pa_context_disconnect(data->context); + pa_context_unref(data->context); + + pa_threaded_mainloop_unlock(data->loop); +out3: + pa_threaded_mainloop_stop(data->loop); + pa_threaded_mainloop_free(data->loop); +out2: + device->ExtraData = NULL; + device->szDeviceName = NULL; + DestroyRingBuffer(data->ring); + + pa_xfree(data); + return ALC_FALSE; +} //}}} + +static void pulse_close(ALCdevice *device) //{{{ +{ + pulse_data *data = device->ExtraData; + + pa_threaded_mainloop_lock(data->loop); + + pa_stream_disconnect(data->stream); + pa_stream_unref(data->stream); + + pa_context_disconnect(data->context); + pa_context_unref(data->context); + + pa_threaded_mainloop_unlock(data->loop); + + pa_threaded_mainloop_stop(data->loop); + pa_threaded_mainloop_free(data->loop); + + device->ExtraData = NULL; + device->szDeviceName = NULL; + DestroyRingBuffer(data->ring); + + pa_xfree(data); +} //}}} +//}}} + +// OpenAL {{{ +static ALCboolean pulse_open_playback(ALCdevice *device, const ALCchar *device_name) //{{{ +{ + if(device_name) + { + if(strcmp(device_name, pulse_device) != 0) + return ALC_FALSE; + } + + return pulse_open(device, pulse_device, device->Format, 0, device->Frequency); +} //}}} + +static void pulse_close_playback(ALCdevice *device) //{{{ +{ + pulse_close(device); +} //}}} + +static ALCboolean pulse_open_capture(ALCdevice *device, const ALCchar *device_name, ALCuint frequency, ALCenum format, ALCsizei samples) //{{{ +{ + if(device_name) + { + if(strcmp(device_name, pulse_capture_device) != 0) + return ALC_FALSE; + } + + return pulse_open(device, pulse_capture_device, format, samples, frequency); +} //}}} + +static void pulse_close_capture(ALCdevice *device) //{{{ +{ + pulse_close(device); +} //}}} + +static void pulse_start_capture(ALCdevice *device) //{{{ +{ + pulse_data *data = device->ExtraData; + + pa_threaded_mainloop_lock(data->loop); + pa_stream_set_read_callback(data->stream, stream_read_callback, device); + pa_threaded_mainloop_unlock(data->loop); +} //}}} + +static void pulse_stop_capture(ALCdevice *device) //{{{ +{ + pulse_data *data = device->ExtraData; + + pa_threaded_mainloop_lock(data->loop); + pa_stream_set_read_callback(data->stream, NULL, NULL); + pa_threaded_mainloop_unlock(data->loop); +} //}}} + +static void pulse_capture_samples(ALCdevice *device, ALCvoid *buffer, ALCuint samples) //{{{ +{ + pulse_data *data = device->ExtraData; + ALCuint available = RingBufferSize(data->ring); + + if(available < samples) + SetALCError(ALC_INVALID_VALUE); + else + ReadRingBuffer(data->ring, buffer, samples); +} //}}} + +static ALCuint pulse_available_samples(ALCdevice *device) //{{{ +{ + pulse_data *data = device->ExtraData; + return RingBufferSize(data->ring); +} //}}} + +BackendFuncs pulse_funcs = { //{{{ + pulse_open_playback, + pulse_close_playback, + pulse_open_capture, + pulse_close_capture, + pulse_start_capture, + pulse_stop_capture, + pulse_capture_samples, + pulse_available_samples +}; //}}} + +void alc_pulse_init(BackendFuncs *func_list) //{{{ +{ + *func_list = pulse_funcs; + + pulse_device = AppendDeviceList("PulseAudio Software"); + AppendAllDeviceList(pulse_device); + + pulse_capture_device = AppendCaptureDeviceList("PulseAudio Capture"); +} //}}} +//}}} |