From e205b25d65ccb380fa158711e24d55b6de5d9bc1 Mon Sep 17 00:00:00 2001 From: Pierre Ossman Date: Thu, 16 Feb 2006 19:19:58 +0000 Subject: Reorganised the source tree. We now have src/ with a couple of subdirs: * daemon/ - Contains the files specific to the polypaudio daemon. * modules/ - All loadable modules. * polyp/ - Files that are part of the public, application interface or are only used in libpolyp. * polypcore/ - All other shared files. * tests/ - Test programs. * utils/ - Utility programs. git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@487 fefdeb5f-60dc-0310-8127-8f9354f1896f --- src/polyp/polyplib-simple.c | 393 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 393 insertions(+) create mode 100644 src/polyp/polyplib-simple.c (limited to 'src/polyp/polyplib-simple.c') diff --git a/src/polyp/polyplib-simple.c b/src/polyp/polyplib-simple.c new file mode 100644 index 00000000..7436f007 --- /dev/null +++ b/src/polyp/polyplib-simple.c @@ -0,0 +1,393 @@ +/* $Id$ */ + +/*** + This file is part of polypaudio. + + polypaudio is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser 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 Lesser 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 +#endif + +#include +#include +#include +#include + +#include "polyplib-simple.h" +#include "polyplib.h" +#include "mainloop.h" +#include +#include +#include + +struct pa_simple { + pa_mainloop *mainloop; + pa_context *context; + pa_stream *stream; + pa_stream_direction_t direction; + + int dead; + + void *read_data; + size_t read_index, read_length; + pa_usec_t latency; +}; + +static void read_callback(pa_stream *s, const void*data, size_t length, void *userdata); + +static int check_error(pa_simple *p, int *rerror) { + pa_context_state_t cst; + pa_stream_state_t sst; + assert(p); + + if ((cst = pa_context_get_state(p->context)) == PA_CONTEXT_FAILED) + goto fail; + + assert(cst != PA_CONTEXT_TERMINATED); + + if (p->stream) { + if ((sst = pa_stream_get_state(p->stream)) == PA_STREAM_FAILED) + goto fail; + + assert(sst != PA_STREAM_TERMINATED); + } + + return 0; + +fail: + if (rerror) + *rerror = pa_context_errno(p->context); + + p->dead = 1; + + return -1; +} + +static int iterate(pa_simple *p, int block, int *rerror) { + assert(p && p->context && p->mainloop); + + if (check_error(p, rerror) < 0) + return -1; + + if (!block && !pa_context_is_pending(p->context)) + return 0; + + do { + if (pa_mainloop_iterate(p->mainloop, 1, NULL) < 0) { + if (rerror) + *rerror = PA_ERROR_INTERNAL; + return -1; + } + + if (check_error(p, rerror) < 0) + return -1; + + } while (pa_context_is_pending(p->context)); + + + while (pa_mainloop_deferred_pending(p->mainloop)) { + + if (pa_mainloop_iterate(p->mainloop, 0, NULL) < 0) { + if (rerror) + *rerror = PA_ERROR_INTERNAL; + return -1; + } + + if (check_error(p, rerror) < 0) + return -1; + } + + return 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_buffer_attr *attr, + int *rerror) { + + pa_simple *p; + int error = PA_ERROR_INTERNAL; + assert(ss && (dir == PA_STREAM_PLAYBACK || dir == PA_STREAM_RECORD)); + + p = pa_xmalloc(sizeof(pa_simple)); + 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; + p->latency = 0; + + if (!(p->context = pa_context_new(pa_mainloop_get_api(p->mainloop), name))) + goto fail; + + pa_context_connect(p->context, server, 1, NULL); + + /* Wait until the context is ready */ + while (pa_context_get_state(p->context) != PA_CONTEXT_READY) { + if (iterate(p, 1, &error) < 0) + goto fail; + } + + if (!(p->stream = pa_stream_new(p->context, stream_name, ss, NULL))) + goto fail; + + if (dir == PA_STREAM_PLAYBACK) + pa_stream_connect_playback(p->stream, dev, attr, 0, NULL); + else + pa_stream_connect_record(p->stream, dev, attr, 0); + + /* Wait until the stream is ready */ + while (pa_stream_get_state(p->stream) != PA_STREAM_READY) { + if (iterate(p, 1, &error) < 0) + goto fail; + } + + pa_stream_set_read_callback(p->stream, read_callback, p); + + return p; + +fail: + if (rerror) + *rerror = error; + pa_simple_free(p); + return NULL; +} + +void pa_simple_free(pa_simple *s) { + assert(s); + + pa_xfree(s->read_data); + + if (s->stream) + pa_stream_unref(s->stream); + + if (s->context) + pa_context_unref(s->context); + + if (s->mainloop) + pa_mainloop_free(s->mainloop); + + pa_xfree(s); +} + +int pa_simple_write(pa_simple *p, const void*data, size_t length, int *rerror) { + assert(p && data && p->direction == PA_STREAM_PLAYBACK); + + if (p->dead) { + if (rerror) + *rerror = pa_context_errno(p->context); + + return -1; + } + + while (length > 0) { + size_t l; + + while (!(l = pa_stream_writable_size(p->stream))) + if (iterate(p, 1, rerror) < 0) + return -1; + + if (l > length) + l = length; + + pa_stream_write(p->stream, data, l, NULL, 0); + data = (const uint8_t*) data + l; + length -= l; + } + + /* Make sure that no data is pending for write */ + if (iterate(p, 0, rerror) < 0) + return -1; + + return 0; +} + +static void read_callback(pa_stream *s, const void*data, size_t length, void *userdata) { + pa_simple *p = userdata; + assert(s && data && length && p); + + if (p->read_data) { + pa_log(__FILE__": Buffer overflow, dropping incoming memory blocks.\n"); + pa_xfree(p->read_data); + } + + p->read_data = pa_xmemdup(data, p->read_length = length); + p->read_index = 0; +} + +int pa_simple_read(pa_simple *p, void*data, size_t length, int *rerror) { + assert(p && data && p->direction == PA_STREAM_RECORD); + + if (p->dead) { + if (rerror) + *rerror = pa_context_errno(p->context); + + return -1; + } + + while (length > 0) { + if (p->read_data) { + size_t l = length; + + if (p->read_length <= l) + l = p->read_length; + + memcpy(data, (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) { + pa_xfree(p->read_data); + p->read_data = NULL; + p->read_index = 0; + } + + if (!length) + return 0; + + assert(!p->read_data); + } + + if (iterate(p, 1, rerror) < 0) + return -1; + } + + return 0; +} + +static void drain_or_flush_complete(pa_stream *s, int success, void *userdata) { + pa_simple *p = userdata; + assert(s && p); + if (!success) + p->dead = 1; +} + +int pa_simple_drain(pa_simple *p, int *rerror) { + pa_operation *o; + assert(p && p->direction == PA_STREAM_PLAYBACK); + + if (p->dead) { + if (rerror) + *rerror = pa_context_errno(p->context); + + return -1; + } + + o = pa_stream_drain(p->stream, drain_or_flush_complete, p); + + while (pa_operation_get_state(o) == PA_OPERATION_RUNNING) { + if (iterate(p, 1, rerror) < 0) { + pa_operation_cancel(o); + pa_operation_unref(o); + return -1; + } + } + + pa_operation_unref(o); + + if (p->dead && rerror) + *rerror = pa_context_errno(p->context); + + return p->dead ? -1 : 0; +} + +static void latency_complete(pa_stream *s, const pa_latency_info *l, void *userdata) { + pa_simple *p = userdata; + assert(s && p); + + if (!l) + p->dead = 1; + else { + int negative = 0; + p->latency = pa_stream_get_latency(s, l, &negative); + if (negative) + p->latency = 0; + } +} + +pa_usec_t pa_simple_get_playback_latency(pa_simple *p, int *rerror) { + pa_operation *o; + assert(p && p->direction == PA_STREAM_PLAYBACK); + + if (p->dead) { + if (rerror) + *rerror = pa_context_errno(p->context); + + return (pa_usec_t) -1; + } + + p->latency = 0; + o = pa_stream_get_latency_info(p->stream, latency_complete, p); + + while (pa_operation_get_state(o) == PA_OPERATION_RUNNING) { + + if (iterate(p, 1, rerror) < 0) { + pa_operation_cancel(o); + pa_operation_unref(o); + return -1; + } + } + + pa_operation_unref(o); + + if (p->dead && rerror) + *rerror = pa_context_errno(p->context); + + return p->dead ? (pa_usec_t) -1 : p->latency; +} + +int pa_simple_flush(pa_simple *p, int *rerror) { + pa_operation *o; + assert(p && p->direction == PA_STREAM_PLAYBACK); + + if (p->dead) { + if (rerror) + *rerror = pa_context_errno(p->context); + + return -1; + } + + o = pa_stream_flush(p->stream, drain_or_flush_complete, p); + + while (pa_operation_get_state(o) == PA_OPERATION_RUNNING) { + if (iterate(p, 1, rerror) < 0) { + pa_operation_cancel(o); + pa_operation_unref(o); + return -1; + } + } + + pa_operation_unref(o); + + if (p->dead && rerror) + *rerror = pa_context_errno(p->context); + + return p->dead ? -1 : 0; +} -- cgit