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Diffstat (limited to 'src/OutputAll.cxx')
| -rw-r--r-- | src/OutputAll.cxx | 608 |
1 files changed, 608 insertions, 0 deletions
diff --git a/src/OutputAll.cxx b/src/OutputAll.cxx new file mode 100644 index 000000000..ec716a411 --- /dev/null +++ b/src/OutputAll.cxx @@ -0,0 +1,608 @@ +/* + * Copyright (C) 2003-2011 The Music Player Daemon Project + * http://www.musicpd.org + * + * 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. + */ + +#include "config.h" + +extern "C" { +#include "output_all.h" +#include "output_internal.h" +} + +#include "OutputControl.hxx" +#include "OutputError.hxx" +#include "mpd_error.h" + +extern "C" { +#include "player_control.h" +#include "conf.h" +#include "chunk.h" +#include "pipe.h" +#include "buffer.h" +#include "notify.h" +} + +#ifndef NDEBUG +#include "chunk.h" +#endif + +#include <assert.h> +#include <string.h> + +#undef G_LOG_DOMAIN +#define G_LOG_DOMAIN "output" + +static struct audio_format input_audio_format; + +static struct audio_output **audio_outputs; +static unsigned int num_audio_outputs; + +/** + * The #music_buffer object where consumed chunks are returned. + */ +static struct music_buffer *g_music_buffer; + +/** + * The #music_pipe object which feeds all audio outputs. It is filled + * by audio_output_all_play(). + */ +static struct music_pipe *g_mp; + +/** + * The "elapsed_time" stamp of the most recently finished chunk. + */ +static float audio_output_all_elapsed_time = -1.0; + +unsigned int audio_output_count(void) +{ + return num_audio_outputs; +} + +struct audio_output * +audio_output_get(unsigned i) +{ + assert(i < num_audio_outputs); + + assert(audio_outputs[i] != NULL); + + return audio_outputs[i]; +} + +struct audio_output * +audio_output_find(const char *name) +{ + for (unsigned i = 0; i < num_audio_outputs; ++i) { + struct audio_output *ao = audio_output_get(i); + + if (strcmp(ao->name, name) == 0) + return ao; + } + + /* name not found */ + return NULL; +} + +static unsigned +audio_output_config_count(void) +{ + unsigned int nr = 0; + const struct config_param *param = NULL; + + while ((param = config_get_next_param(CONF_AUDIO_OUTPUT, param))) + nr++; + if (!nr) + nr = 1; /* we'll always have at least one device */ + return nr; +} + +void +audio_output_all_init(struct player_control *pc) +{ + const struct config_param *param = NULL; + unsigned int i; + GError *error = NULL; + + notify_init(&audio_output_client_notify); + + num_audio_outputs = audio_output_config_count(); + audio_outputs = g_new(struct audio_output *, num_audio_outputs); + + for (i = 0; i < num_audio_outputs; i++) + { + unsigned int j; + + param = config_get_next_param(CONF_AUDIO_OUTPUT, param); + + /* only allow param to be NULL if there just one audioOutput */ + assert(param || (num_audio_outputs == 1)); + + struct audio_output *output = audio_output_new(param, pc, &error); + if (output == NULL) { + if (param != NULL) + MPD_ERROR("line %i: %s", + param->line, error->message); + else + MPD_ERROR("%s", error->message); + } + + audio_outputs[i] = output; + + /* require output names to be unique: */ + for (j = 0; j < i; j++) { + if (!strcmp(output->name, audio_outputs[j]->name)) { + MPD_ERROR("output devices with identical " + "names: %s\n", output->name); + } + } + } +} + +void +audio_output_all_finish(void) +{ + unsigned int i; + + for (i = 0; i < num_audio_outputs; i++) { + audio_output_disable(audio_outputs[i]); + audio_output_finish(audio_outputs[i]); + } + + g_free(audio_outputs); + audio_outputs = NULL; + num_audio_outputs = 0; + + notify_deinit(&audio_output_client_notify); +} + +void +audio_output_all_enable_disable(void) +{ + for (unsigned i = 0; i < num_audio_outputs; i++) { + struct audio_output *ao = audio_outputs[i]; + bool enabled; + + g_mutex_lock(ao->mutex); + enabled = ao->really_enabled; + g_mutex_unlock(ao->mutex); + + if (ao->enabled != enabled) { + if (ao->enabled) + audio_output_enable(ao); + else + audio_output_disable(ao); + } + } +} + +/** + * Determine if all (active) outputs have finished the current + * command. + */ +static bool +audio_output_all_finished(void) +{ + for (unsigned i = 0; i < num_audio_outputs; ++i) { + struct audio_output *ao = audio_outputs[i]; + bool not_finished; + + g_mutex_lock(ao->mutex); + not_finished = audio_output_is_open(ao) && + !audio_output_command_is_finished(ao); + g_mutex_unlock(ao->mutex); + + if (not_finished) + return false; + } + + return true; +} + +static void audio_output_wait_all(void) +{ + while (!audio_output_all_finished()) + notify_wait(&audio_output_client_notify); +} + +/** + * Signals all audio outputs which are open. + */ +static void +audio_output_allow_play_all(void) +{ + for (unsigned i = 0; i < num_audio_outputs; ++i) + audio_output_allow_play(audio_outputs[i]); +} + +static void +audio_output_reset_reopen(struct audio_output *ao) +{ + g_mutex_lock(ao->mutex); + + if (!ao->open && ao->fail_timer != NULL) { + g_timer_destroy(ao->fail_timer); + ao->fail_timer = NULL; + } + + g_mutex_unlock(ao->mutex); +} + +/** + * Resets the "reopen" flag on all audio devices. MPD should + * immediately retry to open the device instead of waiting for the + * timeout when the user wants to start playback. + */ +static void +audio_output_all_reset_reopen(void) +{ + for (unsigned i = 0; i < num_audio_outputs; ++i) { + struct audio_output *ao = audio_outputs[i]; + + audio_output_reset_reopen(ao); + } +} + +/** + * Opens all output devices which are enabled, but closed. + * + * @return true if there is at least open output device which is open + */ +static bool +audio_output_all_update(void) +{ + unsigned int i; + bool ret = false; + + if (!audio_format_defined(&input_audio_format)) + return false; + + for (i = 0; i < num_audio_outputs; ++i) + ret = audio_output_update(audio_outputs[i], + &input_audio_format, g_mp) || ret; + + return ret; +} + +bool +audio_output_all_play(struct music_chunk *chunk, GError **error_r) +{ + bool ret; + unsigned int i; + + assert(g_music_buffer != NULL); + assert(g_mp != NULL); + assert(chunk != NULL); + assert(music_chunk_check_format(chunk, &input_audio_format)); + + ret = audio_output_all_update(); + if (!ret) { + /* TODO: obtain real error */ + g_set_error(error_r, output_quark(), 0, + "Failed to open audio output"); + return false; + } + + music_pipe_push(g_mp, chunk); + + for (i = 0; i < num_audio_outputs; ++i) + audio_output_play(audio_outputs[i]); + + return true; +} + +bool +audio_output_all_open(const struct audio_format *audio_format, + struct music_buffer *buffer, + GError **error_r) +{ + bool ret = false, enabled = false; + unsigned int i; + + assert(audio_format != NULL); + assert(buffer != NULL); + assert(g_music_buffer == NULL || g_music_buffer == buffer); + assert((g_mp == NULL) == (g_music_buffer == NULL)); + + g_music_buffer = buffer; + + /* the audio format must be the same as existing chunks in the + pipe */ + assert(g_mp == NULL || music_pipe_check_format(g_mp, audio_format)); + + if (g_mp == NULL) + g_mp = music_pipe_new(); + else + /* if the pipe hasn't been cleared, the the audio + format must not have changed */ + assert(music_pipe_empty(g_mp) || + audio_format_equals(audio_format, + &input_audio_format)); + + input_audio_format = *audio_format; + + audio_output_all_reset_reopen(); + audio_output_all_enable_disable(); + audio_output_all_update(); + + for (i = 0; i < num_audio_outputs; ++i) { + if (audio_outputs[i]->enabled) + enabled = true; + + if (audio_outputs[i]->open) + ret = true; + } + + if (!enabled) + g_set_error(error_r, output_quark(), 0, + "All audio outputs are disabled"); + else if (!ret) + /* TODO: obtain real error */ + g_set_error(error_r, output_quark(), 0, + "Failed to open audio output"); + + if (!ret) + /* close all devices if there was an error */ + audio_output_all_close(); + + return ret; +} + +/** + * Has the specified audio output already consumed this chunk? + */ +static bool +chunk_is_consumed_in(const struct audio_output *ao, + const struct music_chunk *chunk) +{ + if (!ao->open) + return true; + + if (ao->chunk == NULL) + return false; + + assert(chunk == ao->chunk || music_pipe_contains(g_mp, ao->chunk)); + + if (chunk != ao->chunk) { + assert(chunk->next != NULL); + return true; + } + + return ao->chunk_finished && chunk->next == NULL; +} + +/** + * Has this chunk been consumed by all audio outputs? + */ +static bool +chunk_is_consumed(const struct music_chunk *chunk) +{ + for (unsigned i = 0; i < num_audio_outputs; ++i) { + const struct audio_output *ao = audio_outputs[i]; + bool consumed; + + g_mutex_lock(ao->mutex); + consumed = chunk_is_consumed_in(ao, chunk); + g_mutex_unlock(ao->mutex); + + if (!consumed) + return false; + } + + return true; +} + +/** + * There's only one chunk left in the pipe (#g_mp), and all audio + * outputs have consumed it already. Clear the reference. + */ +static void +clear_tail_chunk(G_GNUC_UNUSED const struct music_chunk *chunk, bool *locked) +{ + assert(chunk->next == NULL); + assert(music_pipe_contains(g_mp, chunk)); + + for (unsigned i = 0; i < num_audio_outputs; ++i) { + struct audio_output *ao = audio_outputs[i]; + + /* this mutex will be unlocked by the caller when it's + ready */ + g_mutex_lock(ao->mutex); + locked[i] = ao->open; + + if (!locked[i]) { + g_mutex_unlock(ao->mutex); + continue; + } + + assert(ao->chunk == chunk); + assert(ao->chunk_finished); + ao->chunk = NULL; + } +} + +unsigned +audio_output_all_check(void) +{ + const struct music_chunk *chunk; + bool is_tail; + struct music_chunk *shifted; + bool locked[num_audio_outputs]; + + assert(g_music_buffer != NULL); + assert(g_mp != NULL); + + while ((chunk = music_pipe_peek(g_mp)) != NULL) { + assert(!music_pipe_empty(g_mp)); + + if (!chunk_is_consumed(chunk)) + /* at least one output is not finished playing + this chunk */ + return music_pipe_size(g_mp); + + if (chunk->length > 0 && chunk->times >= 0.0) + /* only update elapsed_time if the chunk + provides a defined value */ + audio_output_all_elapsed_time = chunk->times; + + is_tail = chunk->next == NULL; + if (is_tail) + /* this is the tail of the pipe - clear the + chunk reference in all outputs */ + clear_tail_chunk(chunk, locked); + + /* remove the chunk from the pipe */ + shifted = music_pipe_shift(g_mp); + assert(shifted == chunk); + + if (is_tail) + /* unlock all audio outputs which were locked + by clear_tail_chunk() */ + for (unsigned i = 0; i < num_audio_outputs; ++i) + if (locked[i]) + g_mutex_unlock(audio_outputs[i]->mutex); + + /* return the chunk to the buffer */ + music_buffer_return(g_music_buffer, shifted); + } + + return 0; +} + +bool +audio_output_all_wait(struct player_control *pc, unsigned threshold) +{ + player_lock(pc); + + if (audio_output_all_check() < threshold) { + player_unlock(pc); + return true; + } + + player_wait(pc); + player_unlock(pc); + + return audio_output_all_check() < threshold; +} + +void +audio_output_all_pause(void) +{ + unsigned int i; + + audio_output_all_update(); + + for (i = 0; i < num_audio_outputs; ++i) + audio_output_pause(audio_outputs[i]); + + audio_output_wait_all(); +} + +void +audio_output_all_drain(void) +{ + for (unsigned i = 0; i < num_audio_outputs; ++i) + audio_output_drain_async(audio_outputs[i]); + + audio_output_wait_all(); +} + +void +audio_output_all_cancel(void) +{ + unsigned int i; + + /* send the cancel() command to all audio outputs */ + + for (i = 0; i < num_audio_outputs; ++i) + audio_output_cancel(audio_outputs[i]); + + audio_output_wait_all(); + + /* clear the music pipe and return all chunks to the buffer */ + + if (g_mp != NULL) + music_pipe_clear(g_mp, g_music_buffer); + + /* the audio outputs are now waiting for a signal, to + synchronize the cleared music pipe */ + + audio_output_allow_play_all(); + + /* invalidate elapsed_time */ + + audio_output_all_elapsed_time = -1.0; +} + +void +audio_output_all_close(void) +{ + unsigned int i; + + for (i = 0; i < num_audio_outputs; ++i) + audio_output_close(audio_outputs[i]); + + if (g_mp != NULL) { + assert(g_music_buffer != NULL); + + music_pipe_clear(g_mp, g_music_buffer); + music_pipe_free(g_mp); + g_mp = NULL; + } + + g_music_buffer = NULL; + + audio_format_clear(&input_audio_format); + + audio_output_all_elapsed_time = -1.0; +} + +void +audio_output_all_release(void) +{ + unsigned int i; + + for (i = 0; i < num_audio_outputs; ++i) + audio_output_release(audio_outputs[i]); + + if (g_mp != NULL) { + assert(g_music_buffer != NULL); + + music_pipe_clear(g_mp, g_music_buffer); + music_pipe_free(g_mp); + g_mp = NULL; + } + + g_music_buffer = NULL; + + audio_format_clear(&input_audio_format); + + audio_output_all_elapsed_time = -1.0; +} + +void +audio_output_all_song_border(void) +{ + /* clear the elapsed_time pointer at the beginning of a new + song */ + audio_output_all_elapsed_time = 0.0; +} + +float +audio_output_all_get_elapsed_time(void) +{ + return audio_output_all_elapsed_time; +} |