diff options
Diffstat (limited to 'polyp/polyplib-simple.c')
| -rw-r--r-- | polyp/polyplib-simple.c | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/polyp/polyplib-simple.c b/polyp/polyplib-simple.c new file mode 100644 index 00000000..024cb18a --- /dev/null +++ b/polyp/polyplib-simple.c @@ -0,0 +1,259 @@ +/* $Id$ */ + +/*** + This file is part of polypaudio. + + polypaudio is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 2 of the License, + or (at your option) any later version. + + polypaudio 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 General Public License + along with polypaudio; 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 "polyplib-simple.h" +#include "polyplib.h" +#include "mainloop.h" +#include "native-common.h" +/*#include "polyp-error.h"*/ + +struct pa_simple { + struct pa_mainloop *mainloop; + struct pa_context *context; + struct pa_stream *stream; + enum pa_stream_direction direction; + + int dead, drained; + + void *read_data; + size_t read_index, read_length; +}; + +static void read_callback(struct pa_stream *s, const void*data, size_t length, void *userdata); + +static int check_error(struct pa_simple *p, int *perror) { + assert(p); + + if (pa_context_is_dead(p->context) || (p->stream && pa_stream_is_dead(p->stream))) { + if (perror) + *perror = pa_context_errno(p->context); + return -1; + } + + return 0; +} + +static int iterate(struct pa_simple *p, int block, int *perror) { + assert(p && p->context && p->mainloop); + + if (check_error(p, perror) < 0) + return -1; + + if (!block && !pa_context_is_pending(p->context)) + return 0; + + do { + if (pa_mainloop_iterate(p->mainloop, 1, NULL) < 0) { + if (perror) + *perror = PA_ERROR_INTERNAL; + return -1; + } + + if (check_error(p, perror) < 0) + return -1; + + } while (pa_context_is_pending(p->context)); + + return 0; +} + +struct pa_simple* pa_simple_new( + const char *server, + const char *name, + enum pa_stream_direction dir, + const char *dev, + const char *stream_name, + const struct pa_sample_spec *ss, + const struct pa_buffer_attr *attr, + int *perror) { + + struct pa_simple *p; + int error = PA_ERROR_INTERNAL; + assert(ss); + + p = malloc(sizeof(struct pa_simple)); + assert(p); + p->context = NULL; + p->stream = NULL; + p->mainloop = pa_mainloop_new(); + assert(p->mainloop); + p->dead = 0; + p->direction = dir; + p->read_data = NULL; + p->read_index = p->read_length = 0; + + if (!(p->context = pa_context_new(pa_mainloop_get_api(p->mainloop), name))) + goto fail; + + if (pa_context_connect(p->context, server, NULL, NULL) < 0) { + error = pa_context_errno(p->context); + goto fail; + } + + /* Wait until the context is ready */ + while (!pa_context_is_ready(p->context)) { + if (iterate(p, 1, &error) < 0) + goto fail; + } + + if (!(p->stream = pa_stream_new(p->context, dir, dev, stream_name, ss, attr, NULL, NULL))) + goto fail; + + /* Wait until the stream is ready */ + while (!pa_stream_is_ready(p->stream)) { + if (iterate(p, 1, &error) < 0) + goto fail; + } + + pa_stream_set_read_callback(p->stream, read_callback, p); + + return p; + +fail: + if (perror) + *perror = error; + pa_simple_free(p); + return NULL; +} + +void pa_simple_free(struct pa_simple *s) { + assert(s); + + free(s->read_data); + + if (s->stream) + pa_stream_free(s->stream); + + if (s->context) + pa_context_free(s->context); + + if (s->mainloop) + pa_mainloop_free(s->mainloop); + + free(s); +} + +int pa_simple_write(struct pa_simple *p, const void*data, size_t length, int *perror) { + assert(p && data && p->direction == PA_STREAM_PLAYBACK); + + while (length > 0) { + size_t l; + + while (!(l = pa_stream_writable_size(p->stream))) + if (iterate(p, 1, perror) < 0) + return -1; + + if (l > length) + l = length; + + pa_stream_write(p->stream, data, l); + data += l; + length -= l; + } + + /* Make sure that no data is pending for write */ + if (iterate(p, 0, perror) < 0) + return -1; + + return 0; +} + +static void read_callback(struct pa_stream *s, const void*data, size_t length, void *userdata) { + struct pa_simple *p = userdata; + assert(s && data && length && p); + + if (p->read_data) { + fprintf(stderr, __FILE__": Buffer overflow, dropping incoming memory blocks.\n"); + free(p->read_data); + } + + p->read_data = malloc(p->read_length = length); + assert(p->read_data); + memcpy(p->read_data, data, length); + p->read_index = 0; +} + +int pa_simple_read(struct pa_simple *p, void*data, size_t length, int *perror) { + assert(p && data && p->direction == PA_STREAM_RECORD); + + while (length > 0) { + if (p->read_data) { + size_t l = length; + + if (p->read_length <= l) + l = p->read_length; + + memcpy(data, p->read_data+p->read_index, l); + + data += l; + length -= l; + + p->read_index += l; + p->read_length -= l; + + if (!p->read_length) { + free(p->read_data); + p->read_data = NULL; + p->read_index = 0; + } + + if (!length) + return 0; + + assert(!p->read_data); + } + + if (iterate(p, 1, perror) < 0) + return -1; + } + + return 0; +} + +static void drain_complete(struct pa_stream *s, void *userdata) { + struct pa_simple *p = userdata; + assert(s && p); + p->drained = 1; +} + +int pa_simple_drain(struct pa_simple *p, int *perror) { + assert(p && p->direction == PA_STREAM_PLAYBACK); + p->drained = 0; + pa_stream_drain(p->stream, drain_complete, p); + + while (!p->drained) { + if (iterate(p, 1, perror) < 0) { + pa_stream_drain(p->stream, NULL, NULL); + return -1; + } + } + + return 0; +} |