diff options
Diffstat (limited to 'src/pulse/simple.c')
| -rw-r--r-- | src/pulse/simple.c | 455 |
1 files changed, 455 insertions, 0 deletions
diff --git a/src/pulse/simple.c b/src/pulse/simple.c new file mode 100644 index 00000000..a41881bb --- /dev/null +++ b/src/pulse/simple.c @@ -0,0 +1,455 @@ +/* $Id$ */ + +/*** + This file is part of PulseAudio. + + PulseAudio is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation; either version 2 of the License, + or (at your option) any later version. + + PulseAudio 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 + General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with PulseAudio; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. +***/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <string.h> +#include <assert.h> +#include <stdlib.h> + +#include <pulse/pulseaudio.h> +#include <pulse/thread-mainloop.h> +#include <pulse/xmalloc.h> + +#include <pulsecore/native-common.h> +#include <pulsecore/log.h> + +#include "simple.h" + +struct pa_simple { + pa_threaded_mainloop *mainloop; + pa_context *context; + pa_stream *stream; + pa_stream_direction_t direction; + + const void *read_data; + size_t read_index, read_length; + + int operation_success; +}; + +#define CHECK_VALIDITY_RETURN_ANY(rerror, expression, error, ret) do { \ +if (!(expression)) { \ + if (rerror) \ + *(rerror) = error; \ + return (ret); \ + } \ +} while(0); + +#define CHECK_SUCCESS_GOTO(p, rerror, expression, label) do { \ +if (!(expression)) { \ + if (rerror) \ + *(rerror) = pa_context_errno((p)->context); \ + goto label; \ + } \ +} while(0); + +#define CHECK_DEAD_GOTO(p, rerror, label) do { \ +if (!(p)->context || pa_context_get_state((p)->context) != PA_CONTEXT_READY || \ + !(p)->stream || pa_stream_get_state((p)->stream) != PA_STREAM_READY) { \ + if (((p)->context && pa_context_get_state((p)->context) == PA_CONTEXT_FAILED) || \ + ((p)->stream && pa_stream_get_state((p)->stream) == PA_STREAM_FAILED)) { \ + if (rerror) \ + *(rerror) = pa_context_errno((p)->context); \ + } else \ + if (rerror) \ + *(rerror) = PA_ERR_BADSTATE; \ + goto label; \ + } \ +} while(0); + +static void context_state_cb(pa_context *c, void *userdata) { + pa_simple *p = userdata; + assert(c); + assert(p); + + switch (pa_context_get_state(c)) { + case PA_CONTEXT_READY: + case PA_CONTEXT_TERMINATED: + case PA_CONTEXT_FAILED: + pa_threaded_mainloop_signal(p->mainloop, 0); + break; + + case PA_CONTEXT_UNCONNECTED: + case PA_CONTEXT_CONNECTING: + case PA_CONTEXT_AUTHORIZING: + case PA_CONTEXT_SETTING_NAME: + break; + } +} + +static void stream_state_cb(pa_stream *s, void * userdata) { + pa_simple *p = userdata; + assert(s); + assert(p); + + switch (pa_stream_get_state(s)) { + + case PA_STREAM_READY: + case PA_STREAM_FAILED: + case PA_STREAM_TERMINATED: + pa_threaded_mainloop_signal(p->mainloop, 0); + break; + + case PA_STREAM_UNCONNECTED: + case PA_STREAM_CREATING: + break; + } +} + +static void stream_request_cb(pa_stream *s, size_t length, void *userdata) { + pa_simple *p = userdata; + assert(p); + + pa_threaded_mainloop_signal(p->mainloop, 0); +} + +static void stream_latency_update_cb(pa_stream *s, void *userdata) { + pa_simple *p = userdata; + + assert(p); + + pa_threaded_mainloop_signal(p->mainloop, 0); +} + +pa_simple* pa_simple_new( + const char *server, + const char *name, + pa_stream_direction_t dir, + const char *dev, + const char *stream_name, + const pa_sample_spec *ss, + const pa_channel_map *map, + const pa_buffer_attr *attr, + int *rerror) { + + pa_simple *p; + int error = PA_ERR_INTERNAL, r; + + CHECK_VALIDITY_RETURN_ANY(rerror, !server || *server, PA_ERR_INVALID, NULL); + CHECK_VALIDITY_RETURN_ANY(rerror, dir == PA_STREAM_PLAYBACK || dir == PA_STREAM_RECORD, PA_ERR_INVALID, NULL); + CHECK_VALIDITY_RETURN_ANY(rerror, !dev || *dev, PA_ERR_INVALID, NULL); + CHECK_VALIDITY_RETURN_ANY(rerror, ss && pa_sample_spec_valid(ss), PA_ERR_INVALID, NULL); + CHECK_VALIDITY_RETURN_ANY(rerror, !map || (pa_channel_map_valid(map) && map->channels == ss->channels), PA_ERR_INVALID, NULL) + + p = pa_xnew(pa_simple, 1); + p->context = NULL; + p->stream = NULL; + p->direction = dir; + p->read_data = NULL; + p->read_index = p->read_length = 0; + + if (!(p->mainloop = pa_threaded_mainloop_new())) + goto fail; + + if (!(p->context = pa_context_new(pa_threaded_mainloop_get_api(p->mainloop), name))) + goto fail; + + pa_context_set_state_callback(p->context, context_state_cb, p); + + if (pa_context_connect(p->context, server, 0, NULL) < 0) { + error = pa_context_errno(p->context); + goto fail; + } + + pa_threaded_mainloop_lock(p->mainloop); + + if (pa_threaded_mainloop_start(p->mainloop) < 0) + goto unlock_and_fail; + + /* Wait until the context is ready */ + pa_threaded_mainloop_wait(p->mainloop); + + if (pa_context_get_state(p->context) != PA_CONTEXT_READY) { + error = pa_context_errno(p->context); + goto unlock_and_fail; + } + + if (!(p->stream = pa_stream_new(p->context, stream_name, ss, map))) { + error = pa_context_errno(p->context); + goto unlock_and_fail; + } + + pa_stream_set_state_callback(p->stream, stream_state_cb, p); + pa_stream_set_read_callback(p->stream, stream_request_cb, p); + pa_stream_set_write_callback(p->stream, stream_request_cb, p); + pa_stream_set_latency_update_callback(p->stream, stream_latency_update_cb, p); + + if (dir == PA_STREAM_PLAYBACK) + r = pa_stream_connect_playback(p->stream, dev, attr, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_AUTO_TIMING_UPDATE, NULL, NULL); + else + r = pa_stream_connect_record(p->stream, dev, attr, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_AUTO_TIMING_UPDATE); + + if (r < 0) { + error = pa_context_errno(p->context); + goto unlock_and_fail; + } + + /* Wait until the stream is ready */ + pa_threaded_mainloop_wait(p->mainloop); + + /* Wait until the stream is ready */ + if (pa_stream_get_state(p->stream) != PA_STREAM_READY) { + error = pa_context_errno(p->context); + goto unlock_and_fail; + } + + pa_threaded_mainloop_unlock(p->mainloop); + + return p; + +unlock_and_fail: + pa_threaded_mainloop_unlock(p->mainloop); + +fail: + if (rerror) + *rerror = error; + pa_simple_free(p); + return NULL; +} + +void pa_simple_free(pa_simple *s) { + assert(s); + + if (s->mainloop) + pa_threaded_mainloop_stop(s->mainloop); + + if (s->stream) + pa_stream_unref(s->stream); + + if (s->context) + pa_context_unref(s->context); + + if (s->mainloop) + pa_threaded_mainloop_free(s->mainloop); + + pa_xfree(s); +} + +int pa_simple_write(pa_simple *p, const void*data, size_t length, int *rerror) { + assert(p); + + CHECK_VALIDITY_RETURN_ANY(rerror, p->direction == PA_STREAM_PLAYBACK, PA_ERR_BADSTATE, -1); + CHECK_VALIDITY_RETURN_ANY(rerror, data && length, PA_ERR_INVALID, -1); + + pa_threaded_mainloop_lock(p->mainloop); + + CHECK_DEAD_GOTO(p, rerror, unlock_and_fail); + + while (length > 0) { + size_t l; + int r; + + while (!(l = pa_stream_writable_size(p->stream))) { + pa_threaded_mainloop_wait(p->mainloop); + CHECK_DEAD_GOTO(p, rerror, unlock_and_fail); + } + + CHECK_SUCCESS_GOTO(p, rerror, l != (size_t) -1, unlock_and_fail); + + if (l > length) + l = length; + + r = pa_stream_write(p->stream, data, l, NULL, 0, PA_SEEK_RELATIVE); + CHECK_SUCCESS_GOTO(p, rerror, r >= 0, unlock_and_fail); + + data = (const uint8_t*) data + l; + length -= l; + } + + pa_threaded_mainloop_unlock(p->mainloop); + return 0; + +unlock_and_fail: + pa_threaded_mainloop_unlock(p->mainloop); + return -1; +} + +int pa_simple_read(pa_simple *p, void*data, size_t length, int *rerror) { + assert(p); + + CHECK_VALIDITY_RETURN_ANY(rerror, p->direction == PA_STREAM_RECORD, PA_ERR_BADSTATE, -1); + CHECK_VALIDITY_RETURN_ANY(rerror, data && length, PA_ERR_INVALID, -1); + + pa_threaded_mainloop_lock(p->mainloop); + + CHECK_DEAD_GOTO(p, rerror, unlock_and_fail); + + while (length > 0) { + size_t l; + + while (!p->read_data) { + int r; + + r = pa_stream_peek(p->stream, &p->read_data, &p->read_length); + CHECK_SUCCESS_GOTO(p, rerror, r == 0, unlock_and_fail); + + if (!p->read_data) { + pa_threaded_mainloop_wait(p->mainloop); + CHECK_DEAD_GOTO(p, rerror, unlock_and_fail); + } else + p->read_index = 0; + } + + l = p->read_length < length ? p->read_length : length; + memcpy(data, (const uint8_t*) p->read_data+p->read_index, l); + + data = (uint8_t*) data + l; + length -= l; + + p->read_index += l; + p->read_length -= l; + + if (!p->read_length) { + int r; + + r = pa_stream_drop(p->stream); + p->read_data = NULL; + p->read_length = 0; + p->read_index = 0; + + CHECK_SUCCESS_GOTO(p, rerror, r == 0, unlock_and_fail); + } + } + + pa_threaded_mainloop_unlock(p->mainloop); + return 0; + +unlock_and_fail: + pa_threaded_mainloop_unlock(p->mainloop); + return -1; +} + +static void success_cb(pa_stream *s, int success, void *userdata) { + pa_simple *p = userdata; + + assert(s); + assert(p); + + p->operation_success = success; + pa_threaded_mainloop_signal(p->mainloop, 0); +} + +int pa_simple_drain(pa_simple *p, int *rerror) { + pa_operation *o = NULL; + + assert(p); + + CHECK_VALIDITY_RETURN_ANY(rerror, p->direction == PA_STREAM_PLAYBACK, PA_ERR_BADSTATE, -1); + + pa_threaded_mainloop_lock(p->mainloop); + CHECK_DEAD_GOTO(p, rerror, unlock_and_fail); + + o = pa_stream_drain(p->stream, success_cb, p); + CHECK_SUCCESS_GOTO(p, rerror, o, unlock_and_fail); + + p->operation_success = 0; + while (pa_operation_get_state(o) != PA_OPERATION_DONE) { + pa_threaded_mainloop_wait(p->mainloop); + CHECK_DEAD_GOTO(p, rerror, unlock_and_fail); + } + CHECK_SUCCESS_GOTO(p, rerror, p->operation_success, unlock_and_fail); + + pa_operation_unref(o); + pa_threaded_mainloop_unlock(p->mainloop); + + return 0; + +unlock_and_fail: + + if (o) { + pa_operation_cancel(o); + pa_operation_unref(o); + } + + pa_threaded_mainloop_unlock(p->mainloop); + return -1; +} + +int pa_simple_flush(pa_simple *p, int *rerror) { + pa_operation *o = NULL; + + assert(p); + + CHECK_VALIDITY_RETURN_ANY(rerror, p->direction == PA_STREAM_PLAYBACK, PA_ERR_BADSTATE, -1); + + pa_threaded_mainloop_lock(p->mainloop); + CHECK_DEAD_GOTO(p, rerror, unlock_and_fail); + + o = pa_stream_flush(p->stream, success_cb, p); + CHECK_SUCCESS_GOTO(p, rerror, o, unlock_and_fail); + + p->operation_success = 0; + while (pa_operation_get_state(o) != PA_OPERATION_DONE) { + pa_threaded_mainloop_wait(p->mainloop); + CHECK_DEAD_GOTO(p, rerror, unlock_and_fail); + } + CHECK_SUCCESS_GOTO(p, rerror, p->operation_success, unlock_and_fail); + + pa_operation_unref(o); + pa_threaded_mainloop_unlock(p->mainloop); + + return 0; + +unlock_and_fail: + + if (o) { + pa_operation_cancel(o); + pa_operation_unref(o); + } + + pa_threaded_mainloop_unlock(p->mainloop); + return -1; +} + +pa_usec_t pa_simple_get_latency(pa_simple *p, int *rerror) { + pa_usec_t t; + int negative; + + assert(p); + + pa_threaded_mainloop_lock(p->mainloop); + + for (;;) { + CHECK_DEAD_GOTO(p, rerror, unlock_and_fail); + + if (pa_stream_get_latency(p->stream, &t, &negative) >= 0) + break; + + CHECK_SUCCESS_GOTO(p, rerror, pa_context_errno(p->context) == PA_ERR_NODATA, unlock_and_fail); + + /* Wait until latency data is available again */ + pa_threaded_mainloop_wait(p->mainloop); + } + + pa_threaded_mainloop_unlock(p->mainloop); + + return negative ? 0 : t; + +unlock_and_fail: + + pa_threaded_mainloop_unlock(p->mainloop); + return (pa_usec_t) -1; +} + |