diff options
Diffstat (limited to 'src/polyp/polyplib-stream.c')
| -rw-r--r-- | src/polyp/polyplib-stream.c | 807 |
1 files changed, 807 insertions, 0 deletions
diff --git a/src/polyp/polyplib-stream.c b/src/polyp/polyplib-stream.c new file mode 100644 index 00000000..63c9245b --- /dev/null +++ b/src/polyp/polyplib-stream.c @@ -0,0 +1,807 @@ +/* $Id$ */ + +/*** + 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 <config.h> +#endif + +#include <assert.h> +#include <string.h> +#include <stdio.h> +#include <string.h> + +#include "polyplib-internal.h" +#include <polypcore/xmalloc.h> +#include <polypcore/pstream-util.h> +#include <polypcore/util.h> +#include <polypcore/log.h> + +#define LATENCY_IPOL_INTERVAL_USEC (10000L) + +pa_stream *pa_stream_new(pa_context *c, const char *name, const pa_sample_spec *ss, const pa_channel_map *map) { + pa_stream *s; + assert(c); + assert(ss); + + if (!pa_sample_spec_valid(ss)) + return NULL; + + if (map && !pa_channel_map_valid(map)) + return NULL; + + s = pa_xnew(pa_stream, 1); + s->ref = 1; + s->context = c; + s->mainloop = c->mainloop; + + s->read_callback = NULL; + s->read_userdata = NULL; + s->write_callback = NULL; + s->write_userdata = NULL; + s->state_callback = NULL; + s->state_userdata = NULL; + + s->direction = PA_STREAM_NODIRECTION; + s->name = pa_xstrdup(name); + s->sample_spec = *ss; + + if (map) + s->channel_map = *map; + else + pa_channel_map_init_auto(&s->channel_map, ss->channels); + + s->channel = 0; + s->channel_valid = 0; + s->device_index = PA_INVALID_INDEX; + s->requested_bytes = 0; + s->state = PA_STREAM_DISCONNECTED; + memset(&s->buffer_attr, 0, sizeof(s->buffer_attr)); + + s->mcalign = pa_mcalign_new(pa_frame_size(ss), c->memblock_stat); + + s->counter = 0; + s->previous_time = 0; + s->previous_ipol_time = 0; + + s->corked = 0; + s->interpolate = 0; + + s->ipol_usec = 0; + memset(&s->ipol_timestamp, 0, sizeof(s->ipol_timestamp)); + s->ipol_event = NULL; + s->ipol_requested = 0; + + PA_LLIST_PREPEND(pa_stream, c->streams, s); + + return pa_stream_ref(s); +} + +static void stream_free(pa_stream *s) { + assert(s); + + if (s->ipol_event) { + assert(s->mainloop); + s->mainloop->time_free(s->ipol_event); + } + + pa_mcalign_free(s->mcalign); + + pa_xfree(s->name); + pa_xfree(s); +} + +void pa_stream_unref(pa_stream *s) { + assert(s && s->ref >= 1); + + if (--(s->ref) == 0) + stream_free(s); +} + +pa_stream* pa_stream_ref(pa_stream *s) { + assert(s && s->ref >= 1); + s->ref++; + return s; +} + +pa_stream_state_t pa_stream_get_state(pa_stream *s) { + assert(s && s->ref >= 1); + return s->state; +} + +pa_context* pa_stream_get_context(pa_stream *s) { + assert(s && s->ref >= 1); + return s->context; +} + +uint32_t pa_stream_get_index(pa_stream *s) { + assert(s && s->ref >= 1); + return s->device_index; +} + +void pa_stream_set_state(pa_stream *s, pa_stream_state_t st) { + assert(s && s->ref >= 1); + + if (s->state == st) + return; + + pa_stream_ref(s); + + s->state = st; + + if ((st == PA_STREAM_FAILED || st == PA_STREAM_TERMINATED) && s->context) { + if (s->channel_valid) + pa_dynarray_put((s->direction == PA_STREAM_PLAYBACK) ? s->context->playback_streams : s->context->record_streams, s->channel, NULL); + + PA_LLIST_REMOVE(pa_stream, s->context->streams, s); + pa_stream_unref(s); + } + + if (s->state_callback) + s->state_callback(s, s->state_userdata); + + pa_stream_unref(s); +} + +void pa_command_stream_killed(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) { + pa_context *c = userdata; + pa_stream *s; + uint32_t channel; + assert(pd && (command == PA_COMMAND_PLAYBACK_STREAM_KILLED || command == PA_COMMAND_RECORD_STREAM_KILLED) && t && c); + + pa_context_ref(c); + + if (pa_tagstruct_getu32(t, &channel) < 0 || + !pa_tagstruct_eof(t)) { + pa_context_fail(c, PA_ERROR_PROTOCOL); + goto finish; + } + + if (!(s = pa_dynarray_get(command == PA_COMMAND_PLAYBACK_STREAM_KILLED ? c->playback_streams : c->record_streams, channel))) + goto finish; + + c->error = PA_ERROR_KILLED; + pa_stream_set_state(s, PA_STREAM_FAILED); + +finish: + pa_context_unref(c); +} + +void pa_command_request(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) { + pa_stream *s; + pa_context *c = userdata; + uint32_t bytes, channel; + assert(pd && command == PA_COMMAND_REQUEST && t && c); + + pa_context_ref(c); + + if (pa_tagstruct_getu32(t, &channel) < 0 || + pa_tagstruct_getu32(t, &bytes) < 0 || + !pa_tagstruct_eof(t)) { + pa_context_fail(c, PA_ERROR_PROTOCOL); + goto finish; + } + + if (!(s = pa_dynarray_get(c->playback_streams, channel))) + goto finish; + + if (s->state != PA_STREAM_READY) + goto finish; + + pa_stream_ref(s); + + s->requested_bytes += bytes; + + if (s->requested_bytes && s->write_callback) + s->write_callback(s, s->requested_bytes, s->write_userdata); + + pa_stream_unref(s); + +finish: + pa_context_unref(c); +} + +static void ipol_callback(pa_mainloop_api *m, pa_time_event *e, PA_GCC_UNUSED const struct timeval *tv, void *userdata) { + struct timeval tv2; + pa_stream *s = userdata; + + pa_stream_ref(s); + +/* pa_log("requesting new ipol data\n"); */ + + if (s->state == PA_STREAM_READY && !s->ipol_requested) { + pa_operation_unref(pa_stream_get_latency_info(s, NULL, NULL)); + s->ipol_requested = 1; + } + + pa_gettimeofday(&tv2); + pa_timeval_add(&tv2, LATENCY_IPOL_INTERVAL_USEC); + + m->time_restart(e, &tv2); + + pa_stream_unref(s); +} + + +void pa_create_stream_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) { + pa_stream *s = userdata; + assert(pd && s && s->state == PA_STREAM_CREATING); + + pa_stream_ref(s); + + if (command != PA_COMMAND_REPLY) { + if (pa_context_handle_error(s->context, command, t) < 0) + goto finish; + + pa_stream_set_state(s, PA_STREAM_FAILED); + goto finish; + } + + if (pa_tagstruct_getu32(t, &s->channel) < 0 || + ((s->direction != PA_STREAM_UPLOAD) && pa_tagstruct_getu32(t, &s->device_index) < 0) || + ((s->direction != PA_STREAM_RECORD) && pa_tagstruct_getu32(t, &s->requested_bytes) < 0) || + !pa_tagstruct_eof(t)) { + pa_context_fail(s->context, PA_ERROR_PROTOCOL); + goto finish; + } + + s->channel_valid = 1; + pa_dynarray_put((s->direction == PA_STREAM_RECORD) ? s->context->record_streams : s->context->playback_streams, s->channel, s); + pa_stream_set_state(s, PA_STREAM_READY); + + if (s->interpolate) { + struct timeval tv; + pa_operation_unref(pa_stream_get_latency_info(s, NULL, NULL)); + + pa_gettimeofday(&tv); + tv.tv_usec += LATENCY_IPOL_INTERVAL_USEC; /* every 100 ms */ + + assert(!s->ipol_event); + s->ipol_event = s->mainloop->time_new(s->mainloop, &tv, &ipol_callback, s); + } + + if (s->requested_bytes && s->ref > 1 && s->write_callback) + s->write_callback(s, s->requested_bytes, s->write_userdata); + +finish: + pa_stream_unref(s); +} + +static void create_stream(pa_stream *s, const char *dev, const pa_buffer_attr *attr, pa_stream_flags_t flags, const pa_cvolume *volume) { + pa_tagstruct *t; + uint32_t tag; + assert(s && s->ref >= 1 && s->state == PA_STREAM_DISCONNECTED); + + pa_stream_ref(s); + + s->interpolate = !!(flags & PA_STREAM_INTERPOLATE_LATENCY); + pa_stream_trash_ipol(s); + + if (attr) + s->buffer_attr = *attr; + else { + /* half a second */ + s->buffer_attr.tlength = pa_bytes_per_second(&s->sample_spec)/2; + s->buffer_attr.maxlength = (s->buffer_attr.tlength*3)/2; + s->buffer_attr.minreq = s->buffer_attr.tlength/100; + s->buffer_attr.prebuf = s->buffer_attr.tlength - s->buffer_attr.minreq; + s->buffer_attr.fragsize = s->buffer_attr.tlength/100; + } + + pa_stream_set_state(s, PA_STREAM_CREATING); + + t = pa_tagstruct_new(NULL, 0); + assert(t); + + if (!dev) { + if (s->direction == PA_STREAM_PLAYBACK) + dev = s->context->conf->default_sink; + else + dev = s->context->conf->default_source; + } + + pa_tagstruct_put(t, + PA_TAG_U32, s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_CREATE_PLAYBACK_STREAM : PA_COMMAND_CREATE_RECORD_STREAM, + PA_TAG_U32, tag = s->context->ctag++, + PA_TAG_STRING, s->name, + PA_TAG_SAMPLE_SPEC, &s->sample_spec, + PA_TAG_CHANNEL_MAP, &s->channel_map, + PA_TAG_U32, PA_INVALID_INDEX, + PA_TAG_STRING, dev, + PA_TAG_U32, s->buffer_attr.maxlength, + PA_TAG_BOOLEAN, !!(flags & PA_STREAM_START_CORKED), + PA_TAG_INVALID); + + if (s->direction == PA_STREAM_PLAYBACK) { + pa_cvolume cv; + pa_tagstruct_put(t, + PA_TAG_U32, s->buffer_attr.tlength, + PA_TAG_U32, s->buffer_attr.prebuf, + PA_TAG_U32, s->buffer_attr.minreq, + PA_TAG_INVALID); + + if (!volume) { + pa_cvolume_reset(&cv, s->sample_spec.channels); + volume = &cv; + } + + pa_tagstruct_put_cvolume(t, volume); + } else + pa_tagstruct_putu32(t, s->buffer_attr.fragsize); + + pa_pstream_send_tagstruct(s->context->pstream, t); + pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_create_stream_callback, s); + + pa_stream_unref(s); +} + +void pa_stream_connect_playback(pa_stream *s, const char *dev, const pa_buffer_attr *attr, pa_stream_flags_t flags, pa_cvolume *volume) { + assert(s && s->context->state == PA_CONTEXT_READY && s->ref >= 1); + s->direction = PA_STREAM_PLAYBACK; + create_stream(s, dev, attr, flags, volume); +} + +void pa_stream_connect_record(pa_stream *s, const char *dev, const pa_buffer_attr *attr, pa_stream_flags_t flags) { + assert(s && s->context->state == PA_CONTEXT_READY && s->ref >= 1); + s->direction = PA_STREAM_RECORD; + create_stream(s, dev, attr, flags, 0); +} + +void pa_stream_write(pa_stream *s, const void *data, size_t length, void (*free_cb)(void *p), size_t delta) { + pa_memchunk chunk; + assert(s && s->context && data && length && s->state == PA_STREAM_READY && s->ref >= 1); + + if (free_cb) { + chunk.memblock = pa_memblock_new_user((void*) data, length, free_cb, 1, s->context->memblock_stat); + assert(chunk.memblock && chunk.memblock->data); + } else { + chunk.memblock = pa_memblock_new(length, s->context->memblock_stat); + assert(chunk.memblock && chunk.memblock->data); + memcpy(chunk.memblock->data, data, length); + } + chunk.index = 0; + chunk.length = length; + + pa_pstream_send_memblock(s->context->pstream, s->channel, delta, &chunk); + pa_memblock_unref(chunk.memblock); + + if (length < s->requested_bytes) + s->requested_bytes -= length; + else + s->requested_bytes = 0; + + s->counter += length; +} + +size_t pa_stream_writable_size(pa_stream *s) { + assert(s && s->ref >= 1); + return s->state == PA_STREAM_READY ? s->requested_bytes : 0; +} + +pa_operation * pa_stream_drain(pa_stream *s, void (*cb) (pa_stream*s, int success, void *userdata), void *userdata) { + pa_operation *o; + pa_tagstruct *t; + uint32_t tag; + assert(s && s->ref >= 1 && s->state == PA_STREAM_READY); + + o = pa_operation_new(s->context, s); + assert(o); + o->callback = (pa_operation_callback) cb; + o->userdata = userdata; + + t = pa_tagstruct_new(NULL, 0); + assert(t); + pa_tagstruct_putu32(t, PA_COMMAND_DRAIN_PLAYBACK_STREAM); + pa_tagstruct_putu32(t, tag = s->context->ctag++); + pa_tagstruct_putu32(t, s->channel); + pa_pstream_send_tagstruct(s->context->pstream, t); + pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_simple_ack_callback, o); + + return pa_operation_ref(o); +} + +static void stream_get_latency_info_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) { + pa_operation *o = userdata; + pa_latency_info i, *p = NULL; + struct timeval local, remote, now; + assert(pd && o && o->stream && o->context); + + if (command != PA_COMMAND_REPLY) { + if (pa_context_handle_error(o->context, command, t) < 0) + goto finish; + + } else if (pa_tagstruct_get_usec(t, &i.buffer_usec) < 0 || + pa_tagstruct_get_usec(t, &i.sink_usec) < 0 || + pa_tagstruct_get_usec(t, &i.source_usec) < 0 || + pa_tagstruct_get_boolean(t, &i.playing) < 0 || + pa_tagstruct_getu32(t, &i.queue_length) < 0 || + pa_tagstruct_get_timeval(t, &local) < 0 || + pa_tagstruct_get_timeval(t, &remote) < 0 || + pa_tagstruct_getu64(t, &i.counter) < 0 || + !pa_tagstruct_eof(t)) { + pa_context_fail(o->context, PA_ERROR_PROTOCOL); + goto finish; + } else { + pa_gettimeofday(&now); + + if (pa_timeval_cmp(&local, &remote) <= 0 && pa_timeval_cmp(&remote, &now) <= 0) { + /* local and remote seem to have synchronized clocks */ + + if (o->stream->direction == PA_STREAM_PLAYBACK) + i.transport_usec = pa_timeval_diff(&remote, &local); + else + i.transport_usec = pa_timeval_diff(&now, &remote); + + i.synchronized_clocks = 1; + i.timestamp = remote; + } else { + /* clocks are not synchronized, let's estimate latency then */ + i.transport_usec = pa_timeval_diff(&now, &local)/2; + i.synchronized_clocks = 0; + i.timestamp = local; + pa_timeval_add(&i.timestamp, i.transport_usec); + } + + if (o->stream->interpolate) { +/* pa_log("new interpol data\n"); */ + o->stream->ipol_timestamp = i.timestamp; + o->stream->ipol_usec = pa_stream_get_time(o->stream, &i); + o->stream->ipol_requested = 0; + } + + p = &i; + } + + if (o->callback) { + void (*cb)(pa_stream *s, const pa_latency_info *_i, void *_userdata) = (void (*)(pa_stream *s, const pa_latency_info *_i, void *_userdata)) o->callback; + cb(o->stream, p, o->userdata); + } + +finish: + pa_operation_done(o); + pa_operation_unref(o); +} + +pa_operation* pa_stream_get_latency_info(pa_stream *s, void (*cb)(pa_stream *p, const pa_latency_info*i, void *userdata), void *userdata) { + uint32_t tag; + pa_operation *o; + pa_tagstruct *t; + struct timeval now; + assert(s && s->direction != PA_STREAM_UPLOAD); + + o = pa_operation_new(s->context, s); + assert(o); + o->callback = (pa_operation_callback) cb; + o->userdata = userdata; + + t = pa_tagstruct_new(NULL, 0); + assert(t); + pa_tagstruct_putu32(t, s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_GET_PLAYBACK_LATENCY : PA_COMMAND_GET_RECORD_LATENCY); + pa_tagstruct_putu32(t, tag = s->context->ctag++); + pa_tagstruct_putu32(t, s->channel); + + pa_gettimeofday(&now); + pa_tagstruct_put_timeval(t, &now); + pa_tagstruct_putu64(t, s->counter); + + pa_pstream_send_tagstruct(s->context->pstream, t); + pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, stream_get_latency_info_callback, o); + + return pa_operation_ref(o); +} + +void pa_stream_disconnect_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) { + pa_stream *s = userdata; + assert(pd && s && s->ref >= 1); + + pa_stream_ref(s); + + if (command != PA_COMMAND_REPLY) { + if (pa_context_handle_error(s->context, command, t) < 0) + goto finish; + + pa_stream_set_state(s, PA_STREAM_FAILED); + goto finish; + } else if (!pa_tagstruct_eof(t)) { + pa_context_fail(s->context, PA_ERROR_PROTOCOL); + goto finish; + } + + pa_stream_set_state(s, PA_STREAM_TERMINATED); + +finish: + pa_stream_unref(s); +} + +void pa_stream_disconnect(pa_stream *s) { + pa_tagstruct *t; + uint32_t tag; + assert(s && s->ref >= 1); + + if (!s->channel_valid || !s->context->state == PA_CONTEXT_READY) + return; + + pa_stream_ref(s); + + t = pa_tagstruct_new(NULL, 0); + assert(t); + + pa_tagstruct_putu32(t, s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_DELETE_PLAYBACK_STREAM : + (s->direction == PA_STREAM_RECORD ? PA_COMMAND_DELETE_RECORD_STREAM : PA_COMMAND_DELETE_UPLOAD_STREAM)); + pa_tagstruct_putu32(t, tag = s->context->ctag++); + pa_tagstruct_putu32(t, s->channel); + pa_pstream_send_tagstruct(s->context->pstream, t); + pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_disconnect_callback, s); + + pa_stream_unref(s); +} + +void pa_stream_set_read_callback(pa_stream *s, void (*cb)(pa_stream *p, const void*data, size_t length, void *userdata), void *userdata) { + assert(s && s->ref >= 1); + s->read_callback = cb; + s->read_userdata = userdata; +} + +void pa_stream_set_write_callback(pa_stream *s, void (*cb)(pa_stream *p, size_t length, void *userdata), void *userdata) { + assert(s && s->ref >= 1); + s->write_callback = cb; + s->write_userdata = userdata; +} + +void pa_stream_set_state_callback(pa_stream *s, void (*cb)(pa_stream *s, void *userdata), void *userdata) { + assert(s && s->ref >= 1); + s->state_callback = cb; + s->state_userdata = userdata; +} + +void pa_stream_simple_ack_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) { + pa_operation *o = userdata; + int success = 1; + assert(pd && o && o->context && o->ref >= 1); + + if (command != PA_COMMAND_REPLY) { + if (pa_context_handle_error(o->context, command, t) < 0) + goto finish; + + success = 0; + } else if (!pa_tagstruct_eof(t)) { + pa_context_fail(o->context, PA_ERROR_PROTOCOL); + goto finish; + } + + if (o->callback) { + void (*cb)(pa_stream *s, int _success, void *_userdata) = (void (*)(pa_stream *s, int _success, void *_userdata)) o->callback; + cb(o->stream, success, o->userdata); + } + +finish: + pa_operation_done(o); + pa_operation_unref(o); +} + +pa_operation* pa_stream_cork(pa_stream *s, int b, void (*cb) (pa_stream*s, int success, void *userdata), void *userdata) { + pa_operation *o; + pa_tagstruct *t; + uint32_t tag; + assert(s && s->ref >= 1 && s->state == PA_STREAM_READY); + + if (s->interpolate) { + if (!s->corked && b) + /* Pausing */ + s->ipol_usec = pa_stream_get_interpolated_time(s); + else if (s->corked && !b) + /* Unpausing */ + pa_gettimeofday(&s->ipol_timestamp); + } + + s->corked = b; + + o = pa_operation_new(s->context, s); + assert(o); + o->callback = (pa_operation_callback) cb; + o->userdata = userdata; + + t = pa_tagstruct_new(NULL, 0); + assert(t); + pa_tagstruct_putu32(t, s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_CORK_PLAYBACK_STREAM : PA_COMMAND_CORK_RECORD_STREAM); + pa_tagstruct_putu32(t, tag = s->context->ctag++); + pa_tagstruct_putu32(t, s->channel); + pa_tagstruct_put_boolean(t, !!b); + pa_pstream_send_tagstruct(s->context->pstream, t); + pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_simple_ack_callback, o); + + pa_operation_unref(pa_stream_get_latency_info(s, NULL, NULL)); + + return pa_operation_ref(o); +} + +static pa_operation* stream_send_simple_command(pa_stream *s, uint32_t command, void (*cb)(pa_stream *s, int success, void *userdata), void *userdata) { + pa_tagstruct *t; + pa_operation *o; + uint32_t tag; + assert(s && s->ref >= 1 && s->state == PA_STREAM_READY); + + o = pa_operation_new(s->context, s); + o->callback = (pa_operation_callback) cb; + o->userdata = userdata; + + t = pa_tagstruct_new(NULL, 0); + pa_tagstruct_putu32(t, command); + pa_tagstruct_putu32(t, tag = s->context->ctag++); + pa_tagstruct_putu32(t, s->channel); + pa_pstream_send_tagstruct(s->context->pstream, t); + pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_simple_ack_callback, o); + + return pa_operation_ref(o); +} + +pa_operation* pa_stream_flush(pa_stream *s, void (*cb)(pa_stream *s, int success, void *userdata), void *userdata) { + pa_operation *o; + o = stream_send_simple_command(s, s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_FLUSH_PLAYBACK_STREAM : PA_COMMAND_FLUSH_RECORD_STREAM, cb, userdata); + pa_operation_unref(pa_stream_get_latency_info(s, NULL, NULL)); + return o; +} + +pa_operation* pa_stream_prebuf(pa_stream *s, void (*cb)(pa_stream *s, int success, void *userdata), void *userdata) { + pa_operation *o; + o = stream_send_simple_command(s, PA_COMMAND_PREBUF_PLAYBACK_STREAM, cb, userdata); + pa_operation_unref(pa_stream_get_latency_info(s, NULL, NULL)); + return o; +} + +pa_operation* pa_stream_trigger(pa_stream *s, void (*cb)(pa_stream *s, int success, void *userdata), void *userdata) { + pa_operation *o; + o = stream_send_simple_command(s, PA_COMMAND_TRIGGER_PLAYBACK_STREAM, cb, userdata); + pa_operation_unref(pa_stream_get_latency_info(s, NULL, NULL)); + return o; +} + +pa_operation* pa_stream_set_name(pa_stream *s, const char *name, void(*cb)(pa_stream*c, int success, void *userdata), void *userdata) { + pa_operation *o; + pa_tagstruct *t; + uint32_t tag; + assert(s && s->ref >= 1 && s->state == PA_STREAM_READY && name && s->direction != PA_STREAM_UPLOAD); + + o = pa_operation_new(s->context, s); + assert(o); + o->callback = (pa_operation_callback) cb; + o->userdata = userdata; + + t = pa_tagstruct_new(NULL, 0); + assert(t); + pa_tagstruct_putu32(t, s->direction == PA_STREAM_RECORD ? PA_COMMAND_SET_RECORD_STREAM_NAME : PA_COMMAND_SET_PLAYBACK_STREAM_NAME); + pa_tagstruct_putu32(t, tag = s->context->ctag++); + pa_tagstruct_putu32(t, s->channel); + pa_tagstruct_puts(t, name); + pa_pstream_send_tagstruct(s->context->pstream, t); + pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_simple_ack_callback, o); + + return pa_operation_ref(o); +} + +uint64_t pa_stream_get_counter(pa_stream *s) { + assert(s); + return s->counter; +} + +pa_usec_t pa_stream_get_time(pa_stream *s, const pa_latency_info *i) { + pa_usec_t usec; + assert(s); + + usec = pa_bytes_to_usec(i->counter, &s->sample_spec); + + if (i) { + if (s->direction == PA_STREAM_PLAYBACK) { + pa_usec_t latency = i->transport_usec + i->buffer_usec + i->sink_usec; + if (usec < latency) + usec = 0; + else + usec -= latency; + + } else if (s->direction == PA_STREAM_RECORD) { + usec += i->source_usec + i->buffer_usec + i->transport_usec; + + if (usec > i->sink_usec) + usec -= i->sink_usec; + else + usec = 0; + } + } + + if (usec < s->previous_time) + usec = s->previous_time; + + s->previous_time = usec; + + return usec; +} + +static pa_usec_t time_counter_diff(pa_stream *s, pa_usec_t t, pa_usec_t c, int *negative) { + assert(s); + + if (negative) + *negative = 0; + + if (c < t) { + if (s->direction == PA_STREAM_RECORD) { + if (negative) + *negative = 1; + + return t-c; + } else + return 0; + } else + return c-t; +} + +pa_usec_t pa_stream_get_latency(pa_stream *s, const pa_latency_info *i, int *negative) { + pa_usec_t t, c; + assert(s && i); + + t = pa_stream_get_time(s, i); + c = pa_bytes_to_usec(s->counter, &s->sample_spec); + + return time_counter_diff(s, t, c, negative); +} + +const pa_sample_spec* pa_stream_get_sample_spec(pa_stream *s) { + assert(s); + return &s->sample_spec; +} + +void pa_stream_trash_ipol(pa_stream *s) { + assert(s); + + if (!s->interpolate) + return; + + memset(&s->ipol_timestamp, 0, sizeof(s->ipol_timestamp)); + s->ipol_usec = 0; +} + +pa_usec_t pa_stream_get_interpolated_time(pa_stream *s) { + pa_usec_t usec; + assert(s && s->interpolate); + + if (s->corked) + usec = s->ipol_usec; + else { + if (s->ipol_timestamp.tv_sec == 0) + usec = 0; + else + usec = s->ipol_usec + pa_timeval_age(&s->ipol_timestamp); + } + + if (usec < s->previous_ipol_time) + usec = s->previous_ipol_time; + + s->previous_ipol_time = usec; + + return usec; +} + +pa_usec_t pa_stream_get_interpolated_latency(pa_stream *s, int *negative) { + pa_usec_t t, c; + assert(s && s->interpolate); + + t = pa_stream_get_interpolated_time(s); + c = pa_bytes_to_usec(s->counter, &s->sample_spec); + return time_counter_diff(s, t, c, negative); +} |