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Diffstat (limited to 'src/output/MultipleOutputs.cxx')
-rw-r--r-- | src/output/MultipleOutputs.cxx | 481 |
1 files changed, 481 insertions, 0 deletions
diff --git a/src/output/MultipleOutputs.cxx b/src/output/MultipleOutputs.cxx new file mode 100644 index 000000000..2791e7045 --- /dev/null +++ b/src/output/MultipleOutputs.cxx @@ -0,0 +1,481 @@ +/* + * Copyright (C) 2003-2014 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" +#include "MultipleOutputs.hxx" +#include "PlayerControl.hxx" +#include "Internal.hxx" +#include "Domain.hxx" +#include "MusicBuffer.hxx" +#include "MusicPipe.hxx" +#include "MusicChunk.hxx" +#include "system/FatalError.hxx" +#include "util/Error.hxx" +#include "config/ConfigData.hxx" +#include "config/ConfigGlobal.hxx" +#include "config/ConfigOption.hxx" +#include "notify.hxx" + +#include <assert.h> +#include <string.h> + +MultipleOutputs::MultipleOutputs(MixerListener &_mixer_listener) + :mixer_listener(_mixer_listener), + buffer(nullptr), pipe(nullptr), + elapsed_time(-1) +{ +} + +MultipleOutputs::~MultipleOutputs() +{ + for (auto i : outputs) { + i->LockDisableWait(); + i->Finish(); + } +} + +static AudioOutput * +LoadOutput(EventLoop &event_loop, MixerListener &mixer_listener, + PlayerControl &pc, const config_param ¶m) +{ + Error error; + AudioOutput *output = audio_output_new(event_loop, param, + mixer_listener, + pc, error); + if (output == nullptr) { + if (param.line > 0) + FormatFatalError("line %i: %s", + param.line, + error.GetMessage()); + else + FatalError(error); + } + + return output; +} + +void +MultipleOutputs::Configure(EventLoop &event_loop, PlayerControl &pc) +{ + for (const config_param *param = config_get_param(CONF_AUDIO_OUTPUT); + param != nullptr; param = param->next) { + auto output = LoadOutput(event_loop, mixer_listener, + pc, *param); + if (FindByName(output->name) != nullptr) + FormatFatalError("output devices with identical " + "names: %s", output->name); + + outputs.push_back(output); + } + + if (outputs.empty()) { + /* auto-detect device */ + const config_param empty; + auto output = LoadOutput(event_loop, mixer_listener, + pc, empty); + outputs.push_back(output); + } +} + +AudioOutput * +MultipleOutputs::FindByName(const char *name) const +{ + for (auto i : outputs) + if (strcmp(i->name, name) == 0) + return i; + + return nullptr; +} + +void +MultipleOutputs::EnableDisable() +{ + for (auto ao : outputs) { + bool enabled; + + ao->mutex.lock(); + enabled = ao->really_enabled; + ao->mutex.unlock(); + + if (ao->enabled != enabled) { + if (ao->enabled) + ao->LockEnableWait(); + else + ao->LockDisableWait(); + } + } +} + +bool +MultipleOutputs::AllFinished() const +{ + for (auto ao : outputs) { + const ScopeLock protect(ao->mutex); + if (ao->IsOpen() && !ao->IsCommandFinished()) + return false; + } + + return true; +} + +void +MultipleOutputs::WaitAll() +{ + while (!AllFinished()) + audio_output_client_notify.Wait(); +} + +void +MultipleOutputs::AllowPlay() +{ + for (auto ao : outputs) + ao->LockAllowPlay(); +} + +static void +audio_output_reset_reopen(AudioOutput *ao) +{ + const ScopeLock protect(ao->mutex); + + ao->fail_timer.Reset(); +} + +void +MultipleOutputs::ResetReopen() +{ + for (auto ao : outputs) + audio_output_reset_reopen(ao); +} + +bool +MultipleOutputs::Update() +{ + bool ret = false; + + if (!input_audio_format.IsDefined()) + return false; + + for (auto ao : outputs) + ret = ao->LockUpdate(input_audio_format, *pipe) + || ret; + + return ret; +} + +void +MultipleOutputs::SetReplayGainMode(ReplayGainMode mode) +{ + for (auto ao : outputs) + ao->SetReplayGainMode(mode); +} + +bool +MultipleOutputs::Play(music_chunk *chunk, Error &error) +{ + assert(buffer != nullptr); + assert(pipe != nullptr); + assert(chunk != nullptr); + assert(chunk->CheckFormat(input_audio_format)); + + if (!Update()) { + /* TODO: obtain real error */ + error.Set(output_domain, "Failed to open audio output"); + return false; + } + + pipe->Push(chunk); + + for (auto ao : outputs) + ao->LockPlay(); + + return true; +} + +bool +MultipleOutputs::Open(const AudioFormat audio_format, + MusicBuffer &_buffer, + Error &error) +{ + bool ret = false, enabled = false; + + assert(buffer == nullptr || buffer == &_buffer); + assert((pipe == nullptr) == (buffer == nullptr)); + + buffer = &_buffer; + + /* the audio format must be the same as existing chunks in the + pipe */ + assert(pipe == nullptr || pipe->CheckFormat(audio_format)); + + if (pipe == nullptr) + pipe = new MusicPipe(); + else + /* if the pipe hasn't been cleared, the the audio + format must not have changed */ + assert(pipe->IsEmpty() || audio_format == input_audio_format); + + input_audio_format = audio_format; + + ResetReopen(); + EnableDisable(); + Update(); + + for (auto ao : outputs) { + if (ao->enabled) + enabled = true; + + if (ao->open) + ret = true; + } + + if (!enabled) + error.Set(output_domain, "All audio outputs are disabled"); + else if (!ret) + /* TODO: obtain real error */ + error.Set(output_domain, "Failed to open audio output"); + + if (!ret) + /* close all devices if there was an error */ + Close(); + + return ret; +} + +/** + * Has the specified audio output already consumed this chunk? + */ +gcc_pure +static bool +chunk_is_consumed_in(const AudioOutput *ao, + gcc_unused const MusicPipe *pipe, + const struct music_chunk *chunk) +{ + if (!ao->open) + return true; + + if (ao->current_chunk == nullptr) + return false; + + assert(chunk == ao->current_chunk || + pipe->Contains(ao->current_chunk)); + + if (chunk != ao->current_chunk) { + assert(chunk->next != nullptr); + return true; + } + + return ao->current_chunk_finished && chunk->next == nullptr; +} + +bool +MultipleOutputs::IsChunkConsumed(const music_chunk *chunk) const +{ + for (auto ao : outputs) { + const ScopeLock protect(ao->mutex); + if (!chunk_is_consumed_in(ao, pipe, chunk)) + return false; + } + + return true; +} + +inline void +MultipleOutputs::ClearTailChunk(gcc_unused const struct music_chunk *chunk, + bool *locked) +{ + assert(chunk->next == nullptr); + assert(pipe->Contains(chunk)); + + for (unsigned i = 0, n = outputs.size(); i != n; ++i) { + AudioOutput *ao = outputs[i]; + + /* this mutex will be unlocked by the caller when it's + ready */ + ao->mutex.lock(); + locked[i] = ao->open; + + if (!locked[i]) { + ao->mutex.unlock(); + continue; + } + + assert(ao->current_chunk == chunk); + assert(ao->current_chunk_finished); + ao->current_chunk = nullptr; + } +} + +unsigned +MultipleOutputs::Check() +{ + const struct music_chunk *chunk; + bool is_tail; + struct music_chunk *shifted; + bool locked[outputs.size()]; + + assert(buffer != nullptr); + assert(pipe != nullptr); + + while ((chunk = pipe->Peek()) != nullptr) { + assert(!pipe->IsEmpty()); + + if (!IsChunkConsumed(chunk)) + /* at least one output is not finished playing + this chunk */ + return pipe->GetSize(); + + if (chunk->length > 0 && chunk->times >= 0.0) + /* only update elapsed_time if the chunk + provides a defined value */ + elapsed_time = chunk->times; + + is_tail = chunk->next == nullptr; + if (is_tail) + /* this is the tail of the pipe - clear the + chunk reference in all outputs */ + ClearTailChunk(chunk, locked); + + /* remove the chunk from the pipe */ + shifted = pipe->Shift(); + assert(shifted == chunk); + + if (is_tail) + /* unlock all audio outputs which were locked + by clear_tail_chunk() */ + for (unsigned i = 0, n = outputs.size(); i != n; ++i) + if (locked[i]) + outputs[i]->mutex.unlock(); + + /* return the chunk to the buffer */ + buffer->Return(shifted); + } + + return 0; +} + +bool +MultipleOutputs::Wait(PlayerControl &pc, unsigned threshold) +{ + pc.Lock(); + + if (Check() < threshold) { + pc.Unlock(); + return true; + } + + pc.Wait(); + pc.Unlock(); + + return Check() < threshold; +} + +void +MultipleOutputs::Pause() +{ + Update(); + + for (auto ao : outputs) + ao->LockPauseAsync(); + + WaitAll(); +} + +void +MultipleOutputs::Drain() +{ + for (auto ao : outputs) + ao->LockDrainAsync(); + + WaitAll(); +} + +void +MultipleOutputs::Cancel() +{ + /* send the cancel() command to all audio outputs */ + + for (auto ao : outputs) + ao->LockCancelAsync(); + + WaitAll(); + + /* clear the music pipe and return all chunks to the buffer */ + + if (pipe != nullptr) + pipe->Clear(*buffer); + + /* the audio outputs are now waiting for a signal, to + synchronize the cleared music pipe */ + + AllowPlay(); + + /* invalidate elapsed_time */ + + elapsed_time = -1.0; +} + +void +MultipleOutputs::Close() +{ + for (auto ao : outputs) + ao->LockCloseWait(); + + if (pipe != nullptr) { + assert(buffer != nullptr); + + pipe->Clear(*buffer); + delete pipe; + pipe = nullptr; + } + + buffer = nullptr; + + input_audio_format.Clear(); + + elapsed_time = -1.0; +} + +void +MultipleOutputs::Release() +{ + for (auto ao : outputs) + ao->LockRelease(); + + if (pipe != nullptr) { + assert(buffer != nullptr); + + pipe->Clear(*buffer); + delete pipe; + pipe = nullptr; + } + + buffer = nullptr; + + input_audio_format.Clear(); + + elapsed_time = -1.0; +} + +void +MultipleOutputs::SongBorder() +{ + /* clear the elapsed_time pointer at the beginning of a new + song */ + elapsed_time = 0.0; +} |