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-rw-r--r--src/DecoderAPI.cxx547
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diff --git a/src/DecoderAPI.cxx b/src/DecoderAPI.cxx
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-/*
- * Copyright (C) 2003-2013 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 "DecoderAPI.hxx"
-#include "DecoderError.hxx"
-#include "AudioConfig.hxx"
-#include "ReplayGainConfig.hxx"
-#include "MusicChunk.hxx"
-#include "MusicBuffer.hxx"
-#include "MusicPipe.hxx"
-#include "DecoderControl.hxx"
-#include "DecoderInternal.hxx"
-#include "Song.hxx"
-#include "InputStream.hxx"
-#include "util/Error.hxx"
-#include "Log.hxx"
-
-#include <assert.h>
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-
-void
-decoder_initialized(Decoder &decoder,
- const AudioFormat audio_format,
- bool seekable, float total_time)
-{
- DecoderControl &dc = decoder.dc;
- struct audio_format_string af_string;
-
- assert(dc.state == DecoderState::START);
- assert(dc.pipe != nullptr);
- assert(decoder.stream_tag == nullptr);
- assert(decoder.decoder_tag == nullptr);
- assert(!decoder.seeking);
- assert(audio_format.IsDefined());
- assert(audio_format.IsValid());
-
- dc.in_audio_format = audio_format;
- dc.out_audio_format = getOutputAudioFormat(audio_format);
-
- dc.seekable = seekable;
- dc.total_time = total_time;
-
- dc.Lock();
- dc.state = DecoderState::DECODE;
- dc.client_cond.signal();
- dc.Unlock();
-
- FormatDebug(decoder_domain, "audio_format=%s, seekable=%s",
- audio_format_to_string(dc.in_audio_format, &af_string),
- seekable ? "true" : "false");
-
- if (dc.in_audio_format != dc.out_audio_format)
- FormatDebug(decoder_domain, "converting to %s",
- audio_format_to_string(dc.out_audio_format,
- &af_string));
-}
-
-/**
- * Checks if we need an "initial seek". If so, then the initial seek
- * is prepared, and the function returns true.
- */
-gcc_pure
-static bool
-decoder_prepare_initial_seek(Decoder &decoder)
-{
- const DecoderControl &dc = decoder.dc;
- assert(dc.pipe != nullptr);
-
- if (dc.state != DecoderState::DECODE)
- /* wait until the decoder has finished initialisation
- (reading file headers etc.) before emitting the
- virtual "SEEK" command */
- return false;
-
- if (decoder.initial_seek_running)
- /* initial seek has already begun - override any other
- command */
- return true;
-
- if (decoder.initial_seek_pending) {
- if (!dc.seekable) {
- /* seeking is not possible */
- decoder.initial_seek_pending = false;
- return false;
- }
-
- if (dc.command == DecoderCommand::NONE) {
- /* begin initial seek */
-
- decoder.initial_seek_pending = false;
- decoder.initial_seek_running = true;
- return true;
- }
-
- /* skip initial seek when there's another command
- (e.g. STOP) */
-
- decoder.initial_seek_pending = false;
- }
-
- return false;
-}
-
-/**
- * Returns the current decoder command. May return a "virtual"
- * synthesized command, e.g. to seek to the beginning of the CUE
- * track.
- */
-gcc_pure
-static DecoderCommand
-decoder_get_virtual_command(Decoder &decoder)
-{
- const DecoderControl &dc = decoder.dc;
- assert(dc.pipe != nullptr);
-
- if (decoder_prepare_initial_seek(decoder))
- return DecoderCommand::SEEK;
-
- return dc.command;
-}
-
-DecoderCommand
-decoder_get_command(Decoder &decoder)
-{
- return decoder_get_virtual_command(decoder);
-}
-
-void
-decoder_command_finished(Decoder &decoder)
-{
- DecoderControl &dc = decoder.dc;
-
- dc.Lock();
-
- assert(dc.command != DecoderCommand::NONE ||
- decoder.initial_seek_running);
- assert(dc.command != DecoderCommand::SEEK ||
- decoder.initial_seek_running ||
- dc.seek_error || decoder.seeking);
- assert(dc.pipe != nullptr);
-
- if (decoder.initial_seek_running) {
- assert(!decoder.seeking);
- assert(decoder.chunk == nullptr);
- assert(dc.pipe->IsEmpty());
-
- decoder.initial_seek_running = false;
- decoder.timestamp = dc.start_ms / 1000.;
- dc.Unlock();
- return;
- }
-
- if (decoder.seeking) {
- decoder.seeking = false;
-
- /* delete frames from the old song position */
-
- if (decoder.chunk != nullptr) {
- dc.buffer->Return(decoder.chunk);
- decoder.chunk = nullptr;
- }
-
- dc.pipe->Clear(*dc.buffer);
-
- decoder.timestamp = dc.seek_where;
- }
-
- dc.command = DecoderCommand::NONE;
- dc.client_cond.signal();
- dc.Unlock();
-}
-
-double decoder_seek_where(gcc_unused Decoder & decoder)
-{
- const DecoderControl &dc = decoder.dc;
-
- assert(dc.pipe != nullptr);
-
- if (decoder.initial_seek_running)
- return dc.start_ms / 1000.;
-
- assert(dc.command == DecoderCommand::SEEK);
-
- decoder.seeking = true;
-
- return dc.seek_where;
-}
-
-void decoder_seek_error(Decoder & decoder)
-{
- DecoderControl &dc = decoder.dc;
-
- assert(dc.pipe != nullptr);
-
- if (decoder.initial_seek_running) {
- /* d'oh, we can't seek to the sub-song start position,
- what now? - no idea, ignoring the problem for now. */
- decoder.initial_seek_running = false;
- return;
- }
-
- assert(dc.command == DecoderCommand::SEEK);
-
- dc.seek_error = true;
- decoder.seeking = false;
-
- decoder_command_finished(decoder);
-}
-
-/**
- * Should be read operation be cancelled? That is the case when the
- * player thread has sent a command such as "STOP".
- */
-gcc_pure
-static inline bool
-decoder_check_cancel_read(const Decoder *decoder)
-{
- if (decoder == nullptr)
- return false;
-
- const DecoderControl &dc = decoder->dc;
- if (dc.command == DecoderCommand::NONE)
- return false;
-
- /* ignore the SEEK command during initialization, the plugin
- should handle that after it has initialized successfully */
- if (dc.command == DecoderCommand::SEEK &&
- (dc.state == DecoderState::START || decoder->seeking))
- return false;
-
- return true;
-}
-
-size_t
-decoder_read(Decoder *decoder,
- InputStream &is,
- void *buffer, size_t length)
-{
- /* XXX don't allow decoder==nullptr */
-
- assert(decoder == nullptr ||
- decoder->dc.state == DecoderState::START ||
- decoder->dc.state == DecoderState::DECODE);
- assert(buffer != nullptr);
-
- if (length == 0)
- return 0;
-
- is.Lock();
-
- while (true) {
- if (decoder_check_cancel_read(decoder)) {
- is.Unlock();
- return 0;
- }
-
- if (is.IsAvailable())
- break;
-
- is.cond.wait(is.mutex);
- }
-
- Error error;
- size_t nbytes = is.Read(buffer, length, error);
- assert(nbytes == 0 || !error.IsDefined());
- assert(nbytes > 0 || error.IsDefined() || is.IsEOF());
-
- is.Unlock();
-
- if (gcc_unlikely(nbytes == 0 && error.IsDefined()))
- LogError(error);
-
- return nbytes;
-}
-
-void
-decoder_timestamp(Decoder &decoder, double t)
-{
- assert(t >= 0);
-
- decoder.timestamp = t;
-}
-
-/**
- * Sends a #tag as-is to the music pipe. Flushes the current chunk
- * (decoder.chunk) if there is one.
- */
-static DecoderCommand
-do_send_tag(Decoder &decoder, const Tag &tag)
-{
- struct music_chunk *chunk;
-
- if (decoder.chunk != nullptr) {
- /* there is a partial chunk - flush it, we want the
- tag in a new chunk */
- decoder_flush_chunk(decoder);
- }
-
- assert(decoder.chunk == nullptr);
-
- chunk = decoder_get_chunk(decoder);
- if (chunk == nullptr) {
- assert(decoder.dc.command != DecoderCommand::NONE);
- return decoder.dc.command;
- }
-
- chunk->tag = new Tag(tag);
- return DecoderCommand::NONE;
-}
-
-static bool
-update_stream_tag(Decoder &decoder, InputStream *is)
-{
- Tag *tag;
-
- tag = is != nullptr
- ? is->LockReadTag()
- : nullptr;
- if (tag == nullptr) {
- tag = decoder.song_tag;
- if (tag == nullptr)
- return false;
-
- /* no stream tag present - submit the song tag
- instead */
- decoder.song_tag = nullptr;
- }
-
- delete decoder.stream_tag;
- decoder.stream_tag = tag;
- return true;
-}
-
-DecoderCommand
-decoder_data(Decoder &decoder,
- InputStream *is,
- const void *data, size_t length,
- uint16_t kbit_rate)
-{
- DecoderControl &dc = decoder.dc;
- DecoderCommand cmd;
-
- assert(dc.state == DecoderState::DECODE);
- assert(dc.pipe != nullptr);
- assert(length % dc.in_audio_format.GetFrameSize() == 0);
-
- dc.Lock();
- cmd = decoder_get_virtual_command(decoder);
- dc.Unlock();
-
- if (cmd == DecoderCommand::STOP || cmd == DecoderCommand::SEEK ||
- length == 0)
- return cmd;
-
- /* send stream tags */
-
- if (update_stream_tag(decoder, is)) {
- if (decoder.decoder_tag != nullptr) {
- /* merge with tag from decoder plugin */
- Tag *tag = Tag::Merge(*decoder.decoder_tag,
- *decoder.stream_tag);
- cmd = do_send_tag(decoder, *tag);
- delete tag;
- } else
- /* send only the stream tag */
- cmd = do_send_tag(decoder, *decoder.stream_tag);
-
- if (cmd != DecoderCommand::NONE)
- return cmd;
- }
-
- if (dc.in_audio_format != dc.out_audio_format) {
- Error error;
- data = decoder.conv_state.Convert(dc.in_audio_format,
- data, length,
- dc.out_audio_format,
- &length,
- error);
- if (data == nullptr) {
- /* the PCM conversion has failed - stop
- playback, since we have no better way to
- bail out */
- LogError(error);
- return DecoderCommand::STOP;
- }
- }
-
- while (length > 0) {
- struct music_chunk *chunk;
- bool full;
-
- chunk = decoder_get_chunk(decoder);
- if (chunk == nullptr) {
- assert(dc.command != DecoderCommand::NONE);
- return dc.command;
- }
-
- const auto dest =
- chunk->Write(dc.out_audio_format,
- decoder.timestamp -
- dc.song->start_ms / 1000.0,
- kbit_rate);
- if (dest.IsNull()) {
- /* the chunk is full, flush it */
- decoder_flush_chunk(decoder);
- continue;
- }
-
- size_t nbytes = dest.size;
- assert(nbytes > 0);
-
- if (nbytes > length)
- nbytes = length;
-
- /* copy the buffer */
-
- memcpy(dest.data, data, nbytes);
-
- /* expand the music pipe chunk */
-
- full = chunk->Expand(dc.out_audio_format, nbytes);
- if (full) {
- /* the chunk is full, flush it */
- decoder_flush_chunk(decoder);
- }
-
- data = (const uint8_t *)data + nbytes;
- length -= nbytes;
-
- decoder.timestamp += (double)nbytes /
- dc.out_audio_format.GetTimeToSize();
-
- if (dc.end_ms > 0 &&
- decoder.timestamp >= dc.end_ms / 1000.0)
- /* the end of this range has been reached:
- stop decoding */
- return DecoderCommand::STOP;
- }
-
- return DecoderCommand::NONE;
-}
-
-DecoderCommand
-decoder_tag(Decoder &decoder, InputStream *is,
- Tag &&tag)
-{
- gcc_unused const DecoderControl &dc = decoder.dc;
- DecoderCommand cmd;
-
- assert(dc.state == DecoderState::DECODE);
- assert(dc.pipe != nullptr);
-
- /* save the tag */
-
- delete decoder.decoder_tag;
- decoder.decoder_tag = new Tag(tag);
-
- /* check for a new stream tag */
-
- update_stream_tag(decoder, is);
-
- /* check if we're seeking */
-
- if (decoder_prepare_initial_seek(decoder))
- /* during initial seek, no music chunk must be created
- until seeking is finished; skip the rest of the
- function here */
- return DecoderCommand::SEEK;
-
- /* send tag to music pipe */
-
- if (decoder.stream_tag != nullptr) {
- /* merge with tag from input stream */
- Tag *merged;
-
- merged = Tag::Merge(*decoder.stream_tag,
- *decoder.decoder_tag);
- cmd = do_send_tag(decoder, *merged);
- delete merged;
- } else
- /* send only the decoder tag */
- cmd = do_send_tag(decoder, *decoder.decoder_tag);
-
- return cmd;
-}
-
-void
-decoder_replay_gain(Decoder &decoder,
- const ReplayGainInfo *replay_gain_info)
-{
- if (replay_gain_info != nullptr) {
- static unsigned serial;
- if (++serial == 0)
- serial = 1;
-
- if (REPLAY_GAIN_OFF != replay_gain_mode) {
- ReplayGainMode rgm = replay_gain_mode;
- if (rgm != REPLAY_GAIN_ALBUM)
- rgm = REPLAY_GAIN_TRACK;
-
- const auto &tuple = replay_gain_info->tuples[rgm];
- const auto scale =
- tuple.CalculateScale(replay_gain_preamp,
- replay_gain_missing_preamp,
- replay_gain_limit);
- decoder.dc.replay_gain_db = 20.0 * log10f(scale);
- }
-
- decoder.replay_gain_info = *replay_gain_info;
- decoder.replay_gain_serial = serial;
-
- if (decoder.chunk != nullptr) {
- /* flush the current chunk because the new
- replay gain values affect the following
- samples */
- decoder_flush_chunk(decoder);
- }
- } else
- decoder.replay_gain_serial = 0;
-}
-
-void
-decoder_mixramp(Decoder &decoder, MixRampInfo &&mix_ramp)
-{
- DecoderControl &dc = decoder.dc;
-
- dc.SetMixRamp(std::move(mix_ramp));
-}