--- /dev/null
+/*****************************************************************************
+ * pulse.c : PulseAudio input plugin for vlc
+ *****************************************************************************
+ * Copyright (C) 2008 the VideoLAN team
+ * Copyright (C) 2009-2011 Rémi Denis-Courmont
+ *
+ * This program 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.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc_common.h>
+#include <vlc_aout.h>
+#include <vlc_demux.h>
+#include <vlc_plugin.h>
+#include <pulse/pulseaudio.h>
+#include <vlc_pulse.h>
+
+static int Open(vlc_object_t *);
+static void Close(vlc_object_t *);
+
+vlc_module_begin ()
+ set_shortname (N_("PulseAudio"))
+ set_description (N_("PulseAudio input"))
+ set_capability ("access_demux", 0)
+ set_category (CAT_INPUT)
+ set_subcategory (SUBCAT_INPUT_ACCESS)
+ add_shortcut ("pulse", "pulseaudio", "pa")
+ set_callbacks (Open, Close)
+vlc_module_end ()
+
+struct demux_sys_t
+{
+ pa_stream *stream; /**< PulseAudio playback stream object */
+ pa_context *context; /**< PulseAudio connection context */
+
+ es_out_id_t *es;
+ bool discontinuity; /**< The next block will not follow the last one */
+ unsigned framesize; /**< Byte size of a sample */
+ mtime_t caching; /**< Caching value */
+};
+
+/* Stream helpers */
+static void stream_state_cb(pa_stream *s, void *userdata)
+{
+ switch (pa_stream_get_state(s)) {
+ case PA_STREAM_READY:
+ case PA_STREAM_FAILED:
+ case PA_STREAM_TERMINATED:
+ vlc_pa_signal(0);
+ default:
+ break;
+ }
+ (void) userdata;
+}
+
+static void stream_moved_cb(pa_stream *s, void *userdata)
+{
+ demux_t *demux = userdata;
+ uint32_t idx = pa_stream_get_device_index(s);
+
+ msg_Dbg(demux, "connected to source %"PRIu32": %s", idx,
+ pa_stream_get_device_name(s));
+}
+
+static void stream_overflow_cb(pa_stream *s, void *userdata)
+{
+ demux_t *demux = userdata;
+
+ msg_Err(demux, "overflow");
+ (void) s;
+}
+
+static void stream_started_cb(pa_stream *s, void *userdata)
+{
+ demux_t *demux = userdata;
+
+ msg_Dbg(demux, "started");
+ (void) s;
+}
+
+static void stream_suspended_cb(pa_stream *s, void *userdata)
+{
+ demux_t *demux = userdata;
+
+ msg_Dbg(demux, "suspended");
+ (void) s;
+}
+
+static void stream_underflow_cb(pa_stream *s, void *userdata)
+{
+ demux_t *demux = userdata;
+
+ msg_Dbg(demux, "underflow");
+ (void) s;
+}
+
+static int stream_wait(pa_stream *stream)
+{
+ pa_stream_state_t state;
+
+ while ((state = pa_stream_get_state(stream)) != PA_STREAM_READY) {
+ if (state == PA_STREAM_FAILED || state == PA_STREAM_TERMINATED)
+ return -1;
+ vlc_pa_wait();
+ }
+ return 0;
+}
+
+static void stream_read_cb(pa_stream *s, size_t length, void *userdata)
+{
+ demux_t *demux = userdata;
+ demux_sys_t *sys = demux->p_sys;
+ const void *ptr;
+ unsigned samples = length / sys->framesize;
+
+ if (pa_stream_peek(s, &ptr, &length) < 0) {
+ vlc_pa_error(demux, "cannot peek stream", sys->context);
+ return;
+ }
+
+ mtime_t pts = mdate();
+ pa_usec_t latency;
+ int negative;
+
+ if (pa_stream_get_latency(s, &latency, &negative) < 0) {
+ vlc_pa_error(demux, "cannot determine latency", sys->context);
+ return;
+ }
+ if (negative)
+ pts += latency;
+ else
+ pts -= latency;
+
+ es_out_Control(demux->out, ES_OUT_SET_PCR, pts);
+ if (unlikely(sys->es == NULL))
+ goto race;
+
+ block_t *block = block_Alloc(length);
+ if (likely(block != NULL)) {
+ vlc_memcpy(block->p_buffer, ptr, length);
+ block->i_nb_samples = samples;
+ block->i_dts = block->i_pts = pts;
+ if (sys->discontinuity) {
+ block->i_flags |= BLOCK_FLAG_DISCONTINUITY;
+ sys->discontinuity = false;
+ }
+
+ es_out_Send(demux->out, sys->es, block);
+ } else
+ sys->discontinuity = true;
+race:
+ pa_stream_drop(s);
+}
+
+static int Control(demux_t *demux, int query, va_list ap)
+{
+ demux_sys_t *sys = demux->p_sys;
+
+ switch (query)
+ {
+ case DEMUX_GET_TIME:
+ {
+ pa_usec_t us;
+
+ if (pa_stream_get_time(sys->stream, &us) < 0)
+ return VLC_EGENERIC;
+ *(va_arg(ap, int64_t *)) = us;
+ break;
+ }
+
+ //case DEMUX_SET_NEXT_DEMUX_TIME: TODO
+ //case DEMUX_GET_META TODO
+
+ case DEMUX_GET_PTS_DELAY:
+ *(va_arg(ap, int64_t *)) = sys->caching;
+ break;
+
+ case DEMUX_HAS_UNSUPPORTED_META:
+ case DEMUX_CAN_RECORD:
+ case DEMUX_CAN_PAUSE:
+ case DEMUX_CAN_CONTROL_PACE:
+ case DEMUX_CAN_CONTROL_RATE:
+ case DEMUX_CAN_SEEK:
+ *(va_arg(ap, bool *)) = false;
+ break;
+
+ default:
+ return VLC_EGENERIC;
+ }
+
+ return VLC_SUCCESS;
+}
+
+static int Open(vlc_object_t *obj)
+{
+ demux_t *demux = (demux_t *)obj;
+
+ pa_context *ctx = vlc_pa_connect(obj);
+ if (ctx == NULL)
+ return VLC_EGENERIC;
+
+ demux_sys_t *sys = malloc(sizeof (*sys));
+ if (unlikely(sys == NULL)) {
+ vlc_pa_disconnect (obj, ctx);
+ return VLC_ENOMEM;
+ }
+ sys->stream = NULL;
+ sys->context = ctx;
+ sys->es = NULL;
+ sys->discontinuity = false;
+ sys->caching = INT64_C(1000) * var_InheritInteger(obj, "live-caching");
+ demux->p_sys = sys;
+
+ /* Stream parameters */
+ struct pa_sample_spec ss;
+ ss.format = PA_SAMPLE_S16NE;
+ ss.rate = 48000;
+ ss.channels = 2;
+ assert(pa_sample_spec_valid(&ss));
+
+ struct pa_channel_map map;
+ map.channels = 2;
+ map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
+ map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
+ assert(pa_channel_map_valid(&map));
+
+ const pa_stream_flags_t flags = PA_STREAM_INTERPOLATE_TIMING
+ | PA_STREAM_AUTO_TIMING_UPDATE
+ /*| PA_STREAM_FIX_FORMAT
+ | PA_STREAM_FIX_RATE
+ | PA_STREAM_FIX_CHANNELS*/;
+ const struct pa_buffer_attr attr = {
+ .maxlength = -1,
+ .fragsize = pa_usec_to_bytes(sys->caching, &ss) / 2,
+ };
+
+ es_format_t fmt;
+
+ /* Create record stream */
+ pa_stream *s;
+
+ vlc_pa_lock();
+ s = pa_stream_new(ctx, "audio stream", &ss, &map);
+ if (s == NULL)
+ goto error;
+
+ sys->stream = s;
+ pa_stream_set_state_callback(s, stream_state_cb, NULL);
+ pa_stream_set_read_callback(s, stream_read_cb, demux);
+ pa_stream_set_moved_callback(s, stream_moved_cb, demux);
+ pa_stream_set_overflow_callback(s, stream_overflow_cb, demux);
+ pa_stream_set_started_callback(s, stream_started_cb, demux);
+ pa_stream_set_suspended_callback(s, stream_suspended_cb, demux);
+ pa_stream_set_underflow_callback(s, stream_underflow_cb, demux);
+
+ if (pa_stream_connect_record(s, NULL, &attr, flags) < 0
+ || stream_wait(s)) {
+ vlc_pa_error(obj, "cannot connect record stream", ctx);
+ goto error;
+ }
+
+ /* The ES should be initialized before stream_read_cb(), but how? */
+ es_format_Init(&fmt, AUDIO_ES, VLC_CODEC_S16N);
+ fmt.audio.i_physical_channels = fmt.audio.i_original_channels =
+ AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
+ fmt.audio.i_channels = ss.channels;
+ fmt.audio.i_rate = ss.rate;
+ fmt.audio.i_bitspersample = 16;
+ fmt.audio.i_blockalign = 2 * ss.channels;
+ fmt.i_bitrate = ss.channels * ss.rate * fmt.audio.i_bitspersample;
+ sys->framesize = fmt.audio.i_blockalign;
+ sys->es = es_out_Add (demux->out, &fmt);
+
+ const struct pa_buffer_attr *pba = pa_stream_get_buffer_attr(s);
+ msg_Dbg(obj, "using buffer metrics: maxlength=%"PRIu32", fragsize=%"PRIu32,
+ pba->maxlength, pba->fragsize);
+ vlc_pa_unlock();
+
+ demux->pf_demux = NULL;
+ demux->pf_control = Control;
+ return VLC_SUCCESS;
+
+error:
+ vlc_pa_unlock();
+ Close(obj);
+ return VLC_EGENERIC;
+}
+
+static void Close (vlc_object_t *obj)
+{
+ demux_t *demux = (demux_t *)obj;
+ demux_sys_t *sys = demux->p_sys;
+ pa_context *ctx = sys->context;
+ pa_stream *s = sys->stream;
+
+ if (likely(s != NULL)) {
+ vlc_pa_lock();
+ pa_stream_disconnect(s);
+ pa_stream_set_state_callback(s, NULL, NULL);
+ pa_stream_set_read_callback(s, NULL, NULL);
+ pa_stream_set_moved_callback(s, NULL, NULL);
+ pa_stream_set_overflow_callback(s, NULL, NULL);
+ pa_stream_set_started_callback(s, NULL, NULL);
+ pa_stream_set_suspended_callback(s, NULL, NULL);
+ pa_stream_set_underflow_callback(s, NULL, NULL);
+ pa_stream_unref(s);
+ vlc_pa_unlock();
+ }
+
+ vlc_pa_disconnect(obj, ctx);
+ free(sys);
+}
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