[MPlayer-cvslog] r24810 - trunk/libao2/ao_pulse.c
reimar
subversion at mplayerhq.hu
Thu Oct 18 15:36:59 CEST 2007
Author: reimar
Date: Thu Oct 18 15:36:59 2007
New Revision: 24810
Log:
Add missing ao_pulse.c
Added:
trunk/libao2/ao_pulse.c
Added: trunk/libao2/ao_pulse.c
==============================================================================
--- (empty file)
+++ trunk/libao2/ao_pulse.c Thu Oct 18 15:36:59 2007
@@ -0,0 +1,382 @@
+/*
+ * PulseAudio audio output driver.
+ * Copyright (C) 2006 Lennart Poettering
+ * Copyright (C) 2007 Reimar Doeffinger
+ *
+ * This file is part of MPlayer.
+ *
+ * MPlayer 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.
+ *
+ * MPlayer 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 MPlayer; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include <string.h>
+
+#include <pulse/pulseaudio.h>
+
+#include "config.h"
+#include "libaf/af_format.h"
+#include "mp_msg.h"
+#include "audio_out.h"
+#include "audio_out_internal.h"
+
+#define PULSE_CLIENT_NAME "MPlayer"
+
+/** General driver info */
+static ao_info_t info = {
+ "PulseAudio audio output",
+ "pulse",
+ "Lennart Poettering",
+ ""
+};
+
+/** The sink to connect to */
+static char *sink;
+
+/** PulseAudio playback stream object */
+static struct pa_stream *stream;
+
+/** PulseAudio connection context */
+static struct pa_context *context;
+
+/** Main event loop object */
+static struct pa_threaded_mainloop *mainloop;
+
+/** A temporary variable to store the current volume */
+static pa_cvolume volume;
+
+LIBAO_EXTERN(pulse)
+
+#define GENERIC_ERR_MSG(ctx, str) \
+ mp_msg(MSGT_AO, MSGL_ERR, "AO: [pulse] "str": %s\n", \
+ pa_strerror(pa_context_errno(ctx)))
+
+static void context_state_cb(pa_context *c, void *userdata) {
+ switch (pa_context_get_state(c)) {
+ case PA_CONTEXT_READY:
+ case PA_CONTEXT_TERMINATED:
+ case PA_CONTEXT_FAILED:
+ pa_threaded_mainloop_signal(mainloop, 0);
+ break;
+ }
+}
+
+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:
+ pa_threaded_mainloop_signal(mainloop, 0);
+ break;
+ }
+}
+
+static void stream_request_cb(pa_stream *s, size_t length, void *userdata) {
+ pa_threaded_mainloop_signal(mainloop, 0);
+}
+
+static void stream_latency_update_cb(pa_stream *s, void *userdata) {
+ pa_threaded_mainloop_signal(mainloop, 0);
+}
+
+static void success_cb(pa_stream *s, int success, void *userdata) {
+ if (userdata)
+ *(int *)userdata = success;
+ pa_threaded_mainloop_signal(mainloop, 0);
+}
+
+static int waitop(pa_operation *op) {
+ pa_operation_state_t state;
+ if (!op) return 0;
+ state = pa_operation_get_state(op);
+ while (state == PA_OPERATION_RUNNING) {
+ pa_threaded_mainloop_wait(mainloop);
+ state = pa_operation_get_state(op);
+ }
+ pa_operation_unref(op);
+ pa_threaded_mainloop_unlock(mainloop);
+ return state == PA_OPERATION_DONE;
+}
+
+static const struct format_map_s {
+ int mp_format;
+ pa_sample_format_t pa_format;
+} format_maps[] = {
+ {AF_FORMAT_U8, PA_SAMPLE_U8},
+ {AF_FORMAT_S16_LE, PA_SAMPLE_S16LE},
+ {AF_FORMAT_S16_BE, PA_SAMPLE_S16BE},
+ {AF_FORMAT_FLOAT_LE, PA_SAMPLE_FLOAT32LE},
+ {AF_FORMAT_FLOAT_BE, PA_SAMPLE_FLOAT32BE},
+ {AF_FORMAT_MU_LAW, PA_SAMPLE_ULAW},
+ {AF_FORMAT_A_LAW, PA_SAMPLE_ALAW},
+ {AF_FORMAT_UNKNOWN, 0}
+};
+
+static int init(int rate_hz, int channels, int format, int flags) {
+ struct pa_sample_spec ss;
+ struct pa_channel_map map;
+ const struct format_map_s *fmt_map;
+ char *host = NULL;
+
+ if (ao_subdevice) {
+ int i = strcspn(ao_subdevice, ":");
+ host = strdup(ao_subdevice);
+ if (host[i] == ':')
+ sink = &host[i + 1];
+ host[i] = 0;
+ }
+
+ ss.channels = channels;
+ ss.rate = rate_hz;
+
+ ao_data.samplerate = rate_hz;
+ ao_data.format = format;
+ ao_data.channels = channels;
+
+ fmt_map = format_maps;
+ while (fmt_map->mp_format != format) {
+ if (fmt_map->mp_format == AF_FORMAT_UNKNOWN) {
+ mp_msg(MSGT_AO, MSGL_ERR, "AO: [pulse] Unsupported sample spec\n");
+ goto fail;
+ }
+ fmt_map++;
+ }
+ ss.format = fmt_map->pa_format;
+
+ if (!pa_sample_spec_valid(&ss)) {
+ mp_msg(MSGT_AO, MSGL_ERR, "AO: [pulse] Invalid sample spec\n");
+ goto fail;
+ }
+
+ pa_channel_map_init_auto(&map, ss.channels, PA_CHANNEL_MAP_ALSA);
+ ao_data.bps = pa_bytes_per_second(&ss);
+
+ pa_cvolume_reset(&volume, ss.channels);
+
+ if (!(mainloop = pa_threaded_mainloop_new())) {
+ mp_msg(MSGT_AO, MSGL_ERR, "AO: [pulse] Failed to allocate main loop\n");
+ goto fail;
+ }
+
+ if (!(context = pa_context_new(pa_threaded_mainloop_get_api(mainloop), PULSE_CLIENT_NAME))) {
+ mp_msg(MSGT_AO, MSGL_ERR, "AO: [pulse] Failed to allocate context\n");
+ goto fail;
+ }
+
+ pa_context_set_state_callback(context, context_state_cb, NULL);
+
+ if (pa_context_connect(context, host, 0, NULL) < 0)
+ goto fail;
+
+ pa_threaded_mainloop_lock(mainloop);
+
+ if (pa_threaded_mainloop_start(mainloop) < 0)
+ goto unlock_and_fail;
+
+ /* Wait until the context is ready */
+ pa_threaded_mainloop_wait(mainloop);
+
+ if (pa_context_get_state(context) != PA_CONTEXT_READY)
+ goto unlock_and_fail;
+
+ if (!(stream = pa_stream_new(context, "audio stream", &ss, &map)))
+ goto unlock_and_fail;
+
+ pa_stream_set_state_callback(stream, stream_state_cb, NULL);
+ pa_stream_set_write_callback(stream, stream_request_cb, NULL);
+ pa_stream_set_latency_update_callback(stream, stream_latency_update_cb, NULL);
+
+ if (pa_stream_connect_playback(stream, sink, NULL, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_AUTO_TIMING_UPDATE, &volume, NULL) < 0)
+ goto unlock_and_fail;
+
+ /* Wait until the stream is ready */
+ pa_threaded_mainloop_wait(mainloop);
+
+ if (pa_stream_get_state(stream) != PA_STREAM_READY)
+ goto unlock_and_fail;
+
+ pa_threaded_mainloop_unlock(mainloop);
+
+ free(host);
+ return 1;
+
+unlock_and_fail:
+
+ if (mainloop)
+ pa_threaded_mainloop_unlock(mainloop);
+
+fail:
+ if (context)
+ GENERIC_ERR_MSG(context, "Init failed");
+ free(host);
+ uninit(1);
+ return 0;
+}
+
+/** Destroy libao driver */
+static void uninit(int immed) {
+ if (stream && !immed) {
+ pa_threaded_mainloop_lock(mainloop);
+ waitop(pa_stream_drain(stream, success_cb, NULL));
+ }
+
+ if (mainloop)
+ pa_threaded_mainloop_stop(mainloop);
+
+ if (stream) {
+ pa_stream_disconnect(stream);
+ pa_stream_unref(stream);
+ stream = NULL;
+ }
+
+ if (context) {
+ pa_context_disconnect(context);
+ pa_context_unref(context);
+ context = NULL;
+ }
+
+ if (mainloop) {
+ pa_threaded_mainloop_free(mainloop);
+ mainloop = NULL;
+ }
+}
+
+/** Play the specified data to the pulseaudio server */
+static int play(void* data, int len, int flags) {
+ if (len) {
+ if (pa_stream_write(stream, data, len, NULL, 0, PA_SEEK_RELATIVE) < 0) {
+ GENERIC_ERR_MSG(context, "pa_stream_write() failed");
+ return -1;
+ }
+ } else {
+ pa_operation *o = pa_stream_trigger(stream, NULL, NULL);
+ if (!o) {
+ GENERIC_ERR_MSG(context, "pa_stream_trigger() failed");
+ return -1;
+ }
+ /* We don't wait for this operation to complete */
+ pa_operation_unref(o);
+ }
+ return len;
+}
+
+static void cork(int b) {
+ int success = 0;
+ pa_threaded_mainloop_lock(mainloop);
+ if (!waitop(pa_stream_cork(stream, b, success_cb, &success)) ||
+ !success)
+ GENERIC_ERR_MSG(context, "pa_stream_cork() failed");
+}
+
+/** Pause the audio stream by corking it on the server */
+static void audio_pause(void) {
+ cork(1);
+}
+
+/** Resume the audio stream by uncorking it on the server */
+static void audio_resume(void) {
+ cork(0);
+}
+
+/** Reset the audio stream, i.e. flush the playback buffer on the server side */
+static void reset(void) {
+ int success = 0;
+ pa_threaded_mainloop_lock(mainloop);
+ if (!waitop(pa_stream_flush(stream, success_cb, &success)) ||
+ !success)
+ GENERIC_ERR_MSG(context, "pa_stream_flush() failed");
+}
+
+/** Return number of bytes that may be written to the server without blocking */
+static int get_space(void) {
+ size_t l;
+ pa_threaded_mainloop_lock(mainloop);
+ l = pa_stream_writable_size(stream);
+ pa_threaded_mainloop_unlock(mainloop);
+ return l < 0 ? 0 : l;
+}
+
+/** Return the current latency in seconds */
+static float get_delay(void) {
+ pa_usec_t latency = (pa_usec_t) -1;
+ pa_threaded_mainloop_lock(mainloop);
+ while (pa_stream_get_latency(stream, &latency, NULL) < 0) {
+ if (pa_context_errno(context) != PA_ERR_NODATA) {
+ GENERIC_ERR_MSG(context, "pa_stream_get_latency() failed");
+ break;
+ }
+ /* Wait until latency data is available again */
+ pa_threaded_mainloop_wait(mainloop);
+ }
+ pa_threaded_mainloop_unlock(mainloop);
+ return latency == (pa_usec_t) -1 ? 0 : latency / 1000000.0;
+}
+
+/** A callback function that is called when the
+ * pa_context_get_sink_input_info() operation completes. Saves the
+ * volume field of the specified structure to the global variable volume. */
+static void info_func(struct pa_context *c, const struct pa_sink_input_info *i, int is_last, void *userdata) {
+ if (is_last < 0) {
+ GENERIC_ERR_MSG(context, "Failed to get sink input info");
+ return;
+ }
+ if (!i)
+ return;
+ volume = i->volume;
+ pa_threaded_mainloop_signal(mainloop, 0);
+}
+
+static int control(int cmd, void *arg) {
+ switch (cmd) {
+ case AOCONTROL_GET_VOLUME: {
+ ao_control_vol_t *vol = arg;
+ uint32_t devidx = pa_stream_get_index(stream);
+ pa_threaded_mainloop_lock(mainloop);
+ if (!waitop(pa_context_get_sink_input_info(context, devidx, info_func, NULL))) {
+ GENERIC_ERR_MSG(context, "pa_stream_get_sink_input_info() failed");
+ return CONTROL_ERROR;
+ }
+
+ if (volume.channels != 2)
+ vol->left = vol->right = pa_cvolume_avg(&volume)*100/PA_VOLUME_NORM;
+ else {
+ vol->left = volume.values[0]*100/PA_VOLUME_NORM;
+ vol->right = volume.values[1]*100/PA_VOLUME_NORM;
+ }
+
+ return CONTROL_OK;
+ }
+
+ case AOCONTROL_SET_VOLUME: {
+ const ao_control_vol_t *vol = arg;
+ pa_operation *o;
+
+ if (volume.channels != 2)
+ pa_cvolume_set(&volume, volume.channels, (pa_volume_t)vol->left*PA_VOLUME_NORM/100);
+ else {
+ volume.values[0] = (pa_volume_t)vol->left*PA_VOLUME_NORM/100;
+ volume.values[1] = (pa_volume_t)vol->right*PA_VOLUME_NORM/100;
+ }
+
+ if (!(o = pa_context_set_sink_input_volume(context, pa_stream_get_index(stream), &volume, NULL, NULL))) {
+ GENERIC_ERR_MSG(context, "pa_context_set_sink_input_volume() failed");
+ return CONTROL_ERROR;
+ }
+ /* We don't wait for completion here */
+ pa_operation_unref(o);
+ return CONTROL_OK;
+ }
+
+ default:
+ return CONTROL_UNKNOWN;
+ }
+}
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