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/* PipeWire
*
* Copyright © 2020 Wim Taymans
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <stdint.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <spa/node/io.h>
#include <spa/param/audio/raw.h>
#include <spa/pod/builder.h>
#include <spa/utils/hook.h>
#include <pipewire/context.h>
#include <pipewire/core.h>
#include <pipewire/log.h>
#include <pipewire/properties.h>
#include <pipewire/stream.h>
#include "format.h"
#include "log.h"
#include "sample.h"
#include "sample-play.h"
static void sample_play_stream_state_changed(void *data, enum pw_stream_state old,
enum pw_stream_state state, const char *error)
{
struct sample_play *p = data;
switch (state) {
case PW_STREAM_STATE_UNCONNECTED:
case PW_STREAM_STATE_ERROR:
sample_play_emit_done(p, -EIO);
break;
case PW_STREAM_STATE_PAUSED:
p->id = pw_stream_get_node_id(p->stream);
sample_play_emit_ready(p, p->id);
break;
default:
break;
}
}
static void sample_play_stream_destroy(void *data)
{
struct sample_play *p = data;
pw_log_info("destroy %s", p->sample->name);
spa_hook_remove(&p->listener);
p->stream = NULL;
sample_unref(p->sample);
p->sample = NULL;
}
static void sample_play_stream_process(void *data)
{
struct sample_play *p = data;
struct sample *s = p->sample;
struct pw_buffer *b;
struct spa_buffer *buf;
uint32_t size;
uint8_t *d;
if (p->offset >= s->length) {
pw_stream_flush(p->stream, true);
return;
}
size = s->length - p->offset;
if ((b = pw_stream_dequeue_buffer(p->stream)) == NULL) {
pw_log_warn("out of buffers: %m");
return;
}
buf = b->buffer;
if ((d = buf->datas[0].data) == NULL)
return;
size = SPA_MIN(size, buf->datas[0].maxsize);
if (b->requested)
size = SPA_MIN(size, b->requested * p->stride);
memcpy(d, s->buffer + p->offset, size);
p->offset += size;
buf->datas[0].chunk->offset = 0;
buf->datas[0].chunk->stride = p->stride;
buf->datas[0].chunk->size = size;
pw_stream_queue_buffer(p->stream, b);
}
static void sample_play_stream_drained(void *data)
{
struct sample_play *p = data;
sample_play_emit_done(p, 0);
}
static const struct pw_stream_events sample_play_stream_events = {
PW_VERSION_STREAM_EVENTS,
.state_changed = sample_play_stream_state_changed,
.destroy = sample_play_stream_destroy,
.process = sample_play_stream_process,
.drained = sample_play_stream_drained,
};
struct sample_play *sample_play_new(struct pw_core *core,
struct sample *sample, struct pw_properties *props,
size_t user_data_size)
{
struct sample_play *p;
uint8_t buffer[1024];
struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer));
const struct spa_pod *params[1];
uint32_t n_params = 0;
int res;
p = calloc(1, sizeof(*p) + user_data_size);
if (p == NULL) {
res = -errno;
goto error_free;
}
p->context = pw_core_get_context(core);
p->main_loop = pw_context_get_main_loop(p->context);
spa_hook_list_init(&p->hooks);
p->user_data = SPA_PTROFF(p, sizeof(struct sample_play), void);
pw_properties_update(props, &sample->props->dict);
p->stream = pw_stream_new(core, sample->name, props);
props = NULL;
if (p->stream == NULL) {
res = -errno;
goto error_free;
}
/* safe to increment the reference count here because it will be decreased
by the stream's 'destroy' event handler, which will be called
(even if `pw_stream_connect()` fails) */
p->sample = sample_ref(sample);
p->stride = sample_spec_frame_size(&sample->ss);
pw_stream_add_listener(p->stream,
&p->listener,
&sample_play_stream_events, p);
params[n_params++] = format_build_param(&b, SPA_PARAM_EnumFormat,
&sample->ss, &sample->map);
res = pw_stream_connect(p->stream,
PW_DIRECTION_OUTPUT,
PW_ID_ANY,
PW_STREAM_FLAG_AUTOCONNECT |
PW_STREAM_FLAG_MAP_BUFFERS |
PW_STREAM_FLAG_RT_PROCESS,
params, n_params);
if (res < 0)
goto error_cleanup;
return p;
error_cleanup:
pw_stream_destroy(p->stream);
error_free:
pw_properties_free(props);
free(p);
errno = -res;
return NULL;
}
void sample_play_destroy(struct sample_play *p)
{
if (p->stream)
pw_stream_destroy(p->stream);
spa_hook_list_clean(&p->hooks);
free(p);
}
void sample_play_add_listener(struct sample_play *p, struct spa_hook *listener,
const struct sample_play_events *events, void *data)
{
spa_hook_list_append(&p->hooks, listener, events, data);
}
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