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-rw-r--r--src/pulsecore/play-memblockq.c283
1 files changed, 283 insertions, 0 deletions
diff --git a/src/pulsecore/play-memblockq.c b/src/pulsecore/play-memblockq.c
new file mode 100644
index 0000000..da586a8
--- /dev/null
+++ b/src/pulsecore/play-memblockq.c
@@ -0,0 +1,283 @@
+/***
+ This file is part of PulseAudio.
+
+ Copyright 2006-2008 Lennart Poettering
+
+ 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 2.1 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, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <pulse/xmalloc.h>
+
+#include <pulsecore/sink-input.h>
+#include <pulsecore/thread-mq.h>
+
+#include "play-memblockq.h"
+
+typedef struct memblockq_stream {
+ pa_msgobject parent;
+ pa_core *core;
+ pa_sink_input *sink_input;
+ pa_memblockq *memblockq;
+} memblockq_stream;
+
+enum {
+ MEMBLOCKQ_STREAM_MESSAGE_UNLINK,
+};
+
+PA_DEFINE_PRIVATE_CLASS(memblockq_stream, pa_msgobject);
+#define MEMBLOCKQ_STREAM(o) (memblockq_stream_cast(o))
+
+static void memblockq_stream_unlink(memblockq_stream *u) {
+ pa_assert(u);
+
+ if (!u->sink_input)
+ return;
+
+ pa_sink_input_unlink(u->sink_input);
+ pa_sink_input_unref(u->sink_input);
+ u->sink_input = NULL;
+
+ memblockq_stream_unref(u);
+}
+
+static void memblockq_stream_free(pa_object *o) {
+ memblockq_stream *u = MEMBLOCKQ_STREAM(o);
+ pa_assert(u);
+
+ if (u->memblockq)
+ pa_memblockq_free(u->memblockq);
+
+ pa_xfree(u);
+}
+
+static int memblockq_stream_process_msg(pa_msgobject *o, int code, void*userdata, int64_t offset, pa_memchunk *chunk) {
+ memblockq_stream *u = MEMBLOCKQ_STREAM(o);
+ memblockq_stream_assert_ref(u);
+
+ switch (code) {
+ case MEMBLOCKQ_STREAM_MESSAGE_UNLINK:
+ memblockq_stream_unlink(u);
+ break;
+ }
+
+ return 0;
+}
+
+static void sink_input_kill_cb(pa_sink_input *i) {
+ memblockq_stream *u;
+
+ pa_sink_input_assert_ref(i);
+ u = MEMBLOCKQ_STREAM(i->userdata);
+ memblockq_stream_assert_ref(u);
+
+ memblockq_stream_unlink(u);
+}
+
+/* Called from IO thread context */
+static void sink_input_state_change_cb(pa_sink_input *i, pa_sink_input_state_t state) {
+ memblockq_stream *u;
+
+ pa_sink_input_assert_ref(i);
+ u = MEMBLOCKQ_STREAM(i->userdata);
+ memblockq_stream_assert_ref(u);
+
+ /* If we are added for the first time, ask for a rewinding so that
+ * we are heard right-away. */
+ if (PA_SINK_INPUT_IS_LINKED(state) &&
+ i->thread_info.state == PA_SINK_INPUT_INIT && i->sink)
+ pa_sink_input_request_rewind(i, 0, false, true, true);
+}
+
+static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk) {
+ memblockq_stream *u;
+
+ pa_sink_input_assert_ref(i);
+ pa_assert(chunk);
+ u = MEMBLOCKQ_STREAM(i->userdata);
+ memblockq_stream_assert_ref(u);
+
+ if (!u->memblockq)
+ return -1;
+
+ if (pa_memblockq_peek(u->memblockq, chunk) < 0) {
+
+ if (pa_sink_input_safe_to_remove(i)) {
+
+ pa_memblockq_free(u->memblockq);
+ u->memblockq = NULL;
+
+ pa_asyncmsgq_post(pa_thread_mq_get()->outq, PA_MSGOBJECT(u), MEMBLOCKQ_STREAM_MESSAGE_UNLINK, NULL, 0, NULL, NULL);
+ }
+
+ return -1;
+ }
+
+ /* If there's no memblock, there's going to be data in the memblockq after
+ * a gap with length chunk->length. Drop the gap and peek the actual
+ * data. There should always be some data coming - hence the assert. The
+ * gap will occur if the memblockq is rewound beyond index 0.*/
+ if (!chunk->memblock) {
+ pa_memblockq_drop(u->memblockq, chunk->length);
+ pa_assert_se(pa_memblockq_peek(u->memblockq, chunk) >= 0);
+ }
+
+ chunk->length = PA_MIN(chunk->length, nbytes);
+ pa_memblockq_drop(u->memblockq, chunk->length);
+
+ return 0;
+}
+
+static void sink_input_process_rewind_cb(pa_sink_input *i, size_t nbytes) {
+ memblockq_stream *u;
+
+ pa_sink_input_assert_ref(i);
+ u = MEMBLOCKQ_STREAM(i->userdata);
+ memblockq_stream_assert_ref(u);
+
+ if (!u->memblockq)
+ return;
+
+ pa_memblockq_rewind(u->memblockq, nbytes);
+}
+
+static void sink_input_update_max_rewind_cb(pa_sink_input *i, size_t nbytes) {
+ memblockq_stream *u;
+
+ pa_sink_input_assert_ref(i);
+ u = MEMBLOCKQ_STREAM(i->userdata);
+ memblockq_stream_assert_ref(u);
+
+ if (!u->memblockq)
+ return;
+
+ pa_memblockq_set_maxrewind(u->memblockq, nbytes);
+}
+
+pa_sink_input* pa_memblockq_sink_input_new(
+ pa_sink *sink,
+ const pa_sample_spec *ss,
+ const pa_channel_map *map,
+ pa_memblockq *q,
+ pa_cvolume *volume,
+ pa_proplist *p,
+ pa_sink_input_flags_t flags) {
+
+ memblockq_stream *u = NULL;
+ pa_sink_input_new_data data;
+
+ pa_assert(sink);
+ pa_assert(ss);
+
+ /* We allow creating this stream with no q set, so that it can be
+ * filled in later */
+
+ u = pa_msgobject_new(memblockq_stream);
+ u->parent.parent.free = memblockq_stream_free;
+ u->parent.process_msg = memblockq_stream_process_msg;
+ u->core = sink->core;
+ u->sink_input = NULL;
+ u->memblockq = NULL;
+
+ pa_sink_input_new_data_init(&data);
+ pa_sink_input_new_data_set_sink(&data, sink, false, true);
+ data.driver = __FILE__;
+ pa_sink_input_new_data_set_sample_spec(&data, ss);
+ pa_sink_input_new_data_set_channel_map(&data, map);
+ pa_sink_input_new_data_set_volume(&data, volume);
+ pa_proplist_update(data.proplist, PA_UPDATE_REPLACE, p);
+ data.flags |= flags;
+
+ pa_sink_input_new(&u->sink_input, sink->core, &data);
+ pa_sink_input_new_data_done(&data);
+
+ if (!u->sink_input)
+ goto fail;
+
+ u->sink_input->pop = sink_input_pop_cb;
+ u->sink_input->process_rewind = sink_input_process_rewind_cb;
+ u->sink_input->update_max_rewind = sink_input_update_max_rewind_cb;
+ u->sink_input->kill = sink_input_kill_cb;
+ u->sink_input->state_change = sink_input_state_change_cb;
+ u->sink_input->userdata = u;
+
+ if (q)
+ pa_memblockq_sink_input_set_queue(u->sink_input, q);
+
+ /* The reference to u is dangling here, because we want
+ * to keep this stream around until it is fully played. */
+
+ /* This sink input is not "put" yet, i.e. pa_sink_input_put() has
+ * not been called! */
+
+ return pa_sink_input_ref(u->sink_input);
+
+fail:
+ if (u)
+ memblockq_stream_unref(u);
+
+ return NULL;
+}
+
+int pa_play_memblockq(
+ pa_sink *sink,
+ const pa_sample_spec *ss,
+ const pa_channel_map *map,
+ pa_memblockq *q,
+ pa_cvolume *volume,
+ pa_proplist *p,
+ pa_sink_input_flags_t flags,
+ uint32_t *sink_input_index) {
+
+ pa_sink_input *i;
+
+ pa_assert(sink);
+ pa_assert(ss);
+ pa_assert(q);
+
+ if (!(i = pa_memblockq_sink_input_new(sink, ss, map, q, volume, p, flags)))
+ return -1;
+
+ pa_sink_input_put(i);
+
+ if (sink_input_index)
+ *sink_input_index = i->index;
+
+ pa_sink_input_unref(i);
+
+ return 0;
+}
+
+void pa_memblockq_sink_input_set_queue(pa_sink_input *i, pa_memblockq *q) {
+ memblockq_stream *u;
+
+ pa_sink_input_assert_ref(i);
+ u = MEMBLOCKQ_STREAM(i->userdata);
+ memblockq_stream_assert_ref(u);
+
+ if (u->memblockq)
+ pa_memblockq_free(u->memblockq);
+
+ if ((u->memblockq = q)) {
+ pa_memblockq_set_prebuf(q, 0);
+ pa_memblockq_set_silence(q, NULL);
+ pa_memblockq_willneed(q);
+ }
+}
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