23 files changed, 477 insertions, 8 deletions

diff --git a/src/encoder/EncoderAPI.hxx b/src/encoder/EncoderAPI.hxx
new file mode 100644
index 000000000..267affa3a
--- /dev/null
+++ b/src/encoder/EncoderAPI.hxx
@@ -0,0 +1,37 @@
+/*
+ * 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.
+ */
+
+/*
+ * This header is included by encoder plugins.
+ *
+ */
+
+#ifndef MPD_ENCODER_API_HXX
+#define MPD_ENCODER_API_HXX
+
+// IWYU pragma: begin_exports
+
+#include "EncoderPlugin.hxx"
+#include "AudioFormat.hxx"
+#include "tag/Tag.hxx"
+#include "ConfigData.hxx"
+
+// IWYU pragma: end_exports
+
+#endif
diff --git a/src/encoder/EncoderList.cxx b/src/encoder/EncoderList.cxx
new file mode 100644
index 000000000..4bca5a4fe
--- /dev/null
+++ b/src/encoder/EncoderList.cxx
@@ -0,0 +1,68 @@
+/*
+ * 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 "EncoderList.hxx"
+#include "EncoderPlugin.hxx"
+#include "plugins/NullEncoderPlugin.hxx"
+#include "plugins/WaveEncoderPlugin.hxx"
+#include "plugins/VorbisEncoderPlugin.hxx"
+#include "plugins/OpusEncoderPlugin.hxx"
+#include "plugins/FlacEncoderPlugin.hxx"
+#include "plugins/ShineEncoderPlugin.hxx"
+#include "plugins/LameEncoderPlugin.hxx"
+#include "plugins/TwolameEncoderPlugin.hxx"
+
+#include <string.h>
+
+const EncoderPlugin *const encoder_plugins[] = {
+	&null_encoder_plugin,
+#ifdef ENABLE_VORBIS_ENCODER
+	&vorbis_encoder_plugin,
+#endif
+#ifdef HAVE_OPUS
+	&opus_encoder_plugin,
+#endif
+#ifdef ENABLE_LAME_ENCODER
+	&lame_encoder_plugin,
+#endif
+#ifdef ENABLE_TWOLAME_ENCODER
+	&twolame_encoder_plugin,
+#endif
+#ifdef ENABLE_WAVE_ENCODER
+	&wave_encoder_plugin,
+#endif
+#ifdef ENABLE_FLAC_ENCODER
+	&flac_encoder_plugin,
+#endif
+#ifdef ENABLE_SHINE_ENCODER
+	&shine_encoder_plugin,
+#endif
+	nullptr
+};
+
+const EncoderPlugin *
+encoder_plugin_get(const char *name)
+{
+	encoder_plugins_for_each(plugin)
+		if (strcmp(plugin->name, name) == 0)
+			return plugin;
+
+	return nullptr;
+}
diff --git a/src/encoder/EncoderList.hxx b/src/encoder/EncoderList.hxx
new file mode 100644
index 000000000..e18d8ec74
--- /dev/null
+++ b/src/encoder/EncoderList.hxx
@@ -0,0 +1,43 @@
+/*
+ * 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.
+ */
+
+#ifndef MPD_ENCODER_LIST_HXX
+#define MPD_ENCODER_LIST_HXX
+
+struct EncoderPlugin;
+
+extern const EncoderPlugin *const encoder_plugins[];
+
+#define encoder_plugins_for_each(plugin) \
+	for (const EncoderPlugin *plugin, \
+		*const*encoder_plugin_iterator = &encoder_plugins[0]; \
+		(plugin = *encoder_plugin_iterator) != nullptr; \
+		++encoder_plugin_iterator)
+
+/**
+ * Looks up an encoder plugin by its name.
+ *
+ * @param name the encoder name to look for
+ * @return the encoder plugin with the specified name, or nullptr if none
+ * was found
+ */
+const EncoderPlugin *
+encoder_plugin_get(const char *name);
+
+#endif
diff --git a/src/encoder/EncoderPlugin.hxx b/src/encoder/EncoderPlugin.hxx
new file mode 100644
index 000000000..95e4e5838
--- /dev/null
+++ b/src/encoder/EncoderPlugin.hxx
@@ -0,0 +1,321 @@
+/*
+ * 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.
+ */
+
+#ifndef MPD_ENCODER_PLUGIN_HXX
+#define MPD_ENCODER_PLUGIN_HXX
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+struct EncoderPlugin;
+struct AudioFormat;
+struct config_param;
+struct Tag;
+class Error;
+
+struct Encoder {
+	const EncoderPlugin &plugin;
+
+#ifndef NDEBUG
+	bool open, pre_tag, tag, end;
+#endif
+
+	explicit Encoder(const EncoderPlugin &_plugin)
+		:plugin(_plugin)
+#ifndef NDEBUG
+		, open(false)
+#endif
+	{}
+};
+
+struct EncoderPlugin {
+	const char *name;
+
+	Encoder *(*init)(const config_param &param,
+			 Error &error);
+
+	void (*finish)(Encoder *encoder);
+
+	bool (*open)(Encoder *encoder,
+		     AudioFormat &audio_format,
+		     Error &error);
+
+	void (*close)(Encoder *encoder);
+
+	bool (*end)(Encoder *encoder, Error &error);
+
+	bool (*flush)(Encoder *encoder, Error &error);
+
+	bool (*pre_tag)(Encoder *encoder, Error &error);
+
+	bool (*tag)(Encoder *encoder, const Tag *tag,
+		    Error &error);
+
+	bool (*write)(Encoder *encoder,
+		      const void *data, size_t length,
+		      Error &error);
+
+	size_t (*read)(Encoder *encoder, void *dest, size_t length);
+
+	const char *(*get_mime_type)(Encoder *encoder);
+};
+
+/**
+ * Creates a new encoder object.
+ *
+ * @param plugin the encoder plugin
+ * @param param optional configuration
+ * @param error location to store the error occurring, or nullptr to ignore errors.
+ * @return an encoder object on success, nullptr on failure
+ */
+static inline Encoder *
+encoder_init(const EncoderPlugin &plugin, const config_param &param,
+	     Error &error_r)
+{
+	return plugin.init(param, error_r);
+}
+
+/**
+ * Frees an encoder object.
+ *
+ * @param encoder the encoder
+ */
+static inline void
+encoder_finish(Encoder *encoder)
+{
+	assert(!encoder->open);
+
+	encoder->plugin.finish(encoder);
+}
+
+/**
+ * Opens an encoder object.  You must call this prior to using it.
+ * Before you free it, you must call encoder_close().  You may open
+ * and close (reuse) one encoder any number of times.
+ *
+ * After this function returns successfully and before the first
+ * encoder_write() call, you should invoke encoder_read() to obtain
+ * the file header.
+ *
+ * @param encoder the encoder
+ * @param audio_format the encoder's input audio format; the plugin
+ * may modify the struct to adapt it to its abilities
+ * @return true on success
+ */
+static inline bool
+encoder_open(Encoder *encoder, AudioFormat &audio_format,
+	     Error &error)
+{
+	assert(!encoder->open);
+
+	bool success = encoder->plugin.open(encoder, audio_format, error);
+#ifndef NDEBUG
+	encoder->open = success;
+	encoder->pre_tag = encoder->tag = encoder->end = false;
+#endif
+	return success;
+}
+
+/**
+ * Closes an encoder object.  This disables the encoder, and readies
+ * it for reusal by calling encoder_open() again.
+ *
+ * @param encoder the encoder
+ */
+static inline void
+encoder_close(Encoder *encoder)
+{
+	assert(encoder->open);
+
+	if (encoder->plugin.close != nullptr)
+		encoder->plugin.close(encoder);
+
+#ifndef NDEBUG
+	encoder->open = false;
+#endif
+}
+
+/**
+ * Ends the stream: flushes the encoder object, generate an
+ * end-of-stream marker (if applicable), make everything which might
+ * currently be buffered available by encoder_read().
+ *
+ * After this function has been called, the encoder may not be usable
+ * for more data, and only encoder_read() and encoder_close() can be
+ * called.
+ *
+ * @param encoder the encoder
+ * @return true on success
+ */
+static inline bool
+encoder_end(Encoder *encoder, Error &error)
+{
+	assert(encoder->open);
+	assert(!encoder->end);
+
+#ifndef NDEBUG
+	encoder->end = true;
+#endif
+
+	/* this method is optional */
+	return encoder->plugin.end != nullptr
+		? encoder->plugin.end(encoder, error)
+		: true;
+}
+
+/**
+ * Flushes an encoder object, make everything which might currently be
+ * buffered available by encoder_read().
+ *
+ * @param encoder the encoder
+ * @return true on success
+ */
+static inline bool
+encoder_flush(Encoder *encoder, Error &error)
+{
+	assert(encoder->open);
+	assert(!encoder->pre_tag);
+	assert(!encoder->tag);
+	assert(!encoder->end);
+
+	/* this method is optional */
+	return encoder->plugin.flush != nullptr
+		? encoder->plugin.flush(encoder, error)
+		: true;
+}
+
+/**
+ * Prepare for sending a tag to the encoder.  This is used by some
+ * encoders to flush the previous sub-stream, in preparation to begin
+ * a new one.
+ *
+ * @param encoder the encoder
+ * @param tag the tag object
+ * @return true on success
+ */
+static inline bool
+encoder_pre_tag(Encoder *encoder, Error &error)
+{
+	assert(encoder->open);
+	assert(!encoder->pre_tag);
+	assert(!encoder->tag);
+	assert(!encoder->end);
+
+	/* this method is optional */
+	bool success = encoder->plugin.pre_tag != nullptr
+		? encoder->plugin.pre_tag(encoder, error)
+		: true;
+
+#ifndef NDEBUG
+	encoder->pre_tag = success;
+#endif
+	return success;
+}
+
+/**
+ * Sends a tag to the encoder.
+ *
+ * Instructions: call encoder_pre_tag(); then obtain flushed data with
+ * encoder_read(); finally call encoder_tag().
+ *
+ * @param encoder the encoder
+ * @param tag the tag object
+ * @return true on success
+ */
+static inline bool
+encoder_tag(Encoder *encoder, const Tag *tag, Error &error)
+{
+	assert(encoder->open);
+	assert(!encoder->pre_tag);
+	assert(encoder->tag);
+	assert(!encoder->end);
+
+#ifndef NDEBUG
+	encoder->tag = false;
+#endif
+
+	/* this method is optional */
+	return encoder->plugin.tag != nullptr
+		? encoder->plugin.tag(encoder, tag, error)
+		: true;
+}
+
+/**
+ * Writes raw PCM data to the encoder.
+ *
+ * @param encoder the encoder
+ * @param data the buffer containing PCM samples
+ * @param length the length of the buffer in bytes
+ * @return true on success
+ */
+static inline bool
+encoder_write(Encoder *encoder, const void *data, size_t length,
+	      Error &error)
+{
+	assert(encoder->open);
+	assert(!encoder->pre_tag);
+	assert(!encoder->tag);
+	assert(!encoder->end);
+
+	return encoder->plugin.write(encoder, data, length, error);
+}
+
+/**
+ * Reads encoded data from the encoder.
+ *
+ * Call this repeatedly until no more data is returned.
+ *
+ * @param encoder the encoder
+ * @param dest the destination buffer to copy to
+ * @param length the maximum length of the destination buffer
+ * @return the number of bytes written to #dest
+ */
+static inline size_t
+encoder_read(Encoder *encoder, void *dest, size_t length)
+{
+	assert(encoder->open);
+	assert(!encoder->pre_tag || !encoder->tag);
+
+#ifndef NDEBUG
+	if (encoder->pre_tag) {
+		encoder->pre_tag = false;
+		encoder->tag = true;
+	}
+#endif
+
+	return encoder->plugin.read(encoder, dest, length);
+}
+
+/**
+ * Get mime type of encoded content.
+ *
+ * @param plugin the encoder plugin
+ * @return an constant string, nullptr on failure
+ */
+static inline const char *
+encoder_get_mime_type(Encoder *encoder)
+{
+	/* this method is optional */
+	return encoder->plugin.get_mime_type != nullptr
+		? encoder->plugin.get_mime_type(encoder)
+		: nullptr;
+}
+
+#endif
diff --git a/src/encoder/FlacEncoderPlugin.cxx b/src/encoder/plugins/FlacEncoderPlugin.cxx
index 83ceea699..ebdd101f3 100644
--- a/src/encoder/FlacEncoderPlugin.cxx
+++ b/src/encoder/plugins/FlacEncoderPlugin.cxx
@@ -19,7 +19,7 @@
 
 #include "config.h"
 #include "FlacEncoderPlugin.hxx"
-#include "EncoderAPI.hxx"
+#include "../EncoderAPI.hxx"
 #include "AudioFormat.hxx"
 #include "pcm/PcmBuffer.hxx"
 #include "ConfigError.hxx"
diff --git a/src/encoder/FlacEncoderPlugin.hxx b/src/encoder/plugins/FlacEncoderPlugin.hxx
index 0cdc01600..0cdc01600 100644
--- a/src/encoder/FlacEncoderPlugin.hxx
+++ b/src/encoder/plugins/FlacEncoderPlugin.hxx
diff --git a/src/encoder/LameEncoderPlugin.cxx b/src/encoder/plugins/LameEncoderPlugin.cxx
index 1f4ab2088..484c4d0fe 100644
--- a/src/encoder/LameEncoderPlugin.cxx
+++ b/src/encoder/plugins/LameEncoderPlugin.cxx
@@ -19,7 +19,7 @@
 
 #include "config.h"
 #include "LameEncoderPlugin.hxx"
-#include "EncoderAPI.hxx"
+#include "../EncoderAPI.hxx"
 #include "AudioFormat.hxx"
 #include "ConfigError.hxx"
 #include "util/NumberParser.hxx"
diff --git a/src/encoder/LameEncoderPlugin.hxx b/src/encoder/plugins/LameEncoderPlugin.hxx
index 03e398f67..03e398f67 100644
--- a/src/encoder/LameEncoderPlugin.hxx
+++ b/src/encoder/plugins/LameEncoderPlugin.hxx
diff --git a/src/encoder/NullEncoderPlugin.cxx b/src/encoder/plugins/NullEncoderPlugin.cxx
index 7ec351b71..1d571d465 100644
--- a/src/encoder/NullEncoderPlugin.cxx
+++ b/src/encoder/plugins/NullEncoderPlugin.cxx
@@ -19,7 +19,7 @@
 
 #include "config.h"
 #include "NullEncoderPlugin.hxx"
-#include "EncoderAPI.hxx"
+#include "../EncoderAPI.hxx"
 #include "util/Manual.hxx"
 #include "util/DynamicFifoBuffer.hxx"
 #include "Compiler.h"
diff --git a/src/encoder/NullEncoderPlugin.hxx b/src/encoder/plugins/NullEncoderPlugin.hxx
index 6acf88e49..6acf88e49 100644
--- a/src/encoder/NullEncoderPlugin.hxx
+++ b/src/encoder/plugins/NullEncoderPlugin.hxx
diff --git a/src/encoder/OggSerial.cxx b/src/encoder/plugins/OggSerial.cxx
index 677829439..677829439 100644
--- a/src/encoder/OggSerial.cxx
+++ b/src/encoder/plugins/OggSerial.cxx
diff --git a/src/encoder/OggSerial.hxx b/src/encoder/plugins/OggSerial.hxx
index ceba8ebf9..ceba8ebf9 100644
--- a/src/encoder/OggSerial.hxx
+++ b/src/encoder/plugins/OggSerial.hxx
diff --git a/src/encoder/OggStream.hxx b/src/encoder/plugins/OggStream.hxx
index 805238c1d..805238c1d 100644
--- a/src/encoder/OggStream.hxx
+++ b/src/encoder/plugins/OggStream.hxx
diff --git a/src/encoder/OpusEncoderPlugin.cxx b/src/encoder/plugins/OpusEncoderPlugin.cxx
index 672ebf5e4..9fbdc8711 100644
--- a/src/encoder/OpusEncoderPlugin.cxx
+++ b/src/encoder/plugins/OpusEncoderPlugin.cxx
@@ -21,7 +21,7 @@
 #include "OpusEncoderPlugin.hxx"
 #include "OggStream.hxx"
 #include "OggSerial.hxx"
-#include "EncoderAPI.hxx"
+#include "../EncoderAPI.hxx"
 #include "AudioFormat.hxx"
 #include "ConfigError.hxx"
 #include "util/Error.hxx"
diff --git a/src/encoder/OpusEncoderPlugin.hxx b/src/encoder/plugins/OpusEncoderPlugin.hxx
index 4e71694b9..4e71694b9 100644
--- a/src/encoder/OpusEncoderPlugin.hxx
+++ b/src/encoder/plugins/OpusEncoderPlugin.hxx
diff --git a/src/encoder/ShineEncoderPlugin.cxx b/src/encoder/plugins/ShineEncoderPlugin.cxx
index 39e400a58..5b1b95a27 100644
--- a/src/encoder/ShineEncoderPlugin.cxx
+++ b/src/encoder/plugins/ShineEncoderPlugin.cxx
@@ -19,7 +19,7 @@
 
 #include "ShineEncoderPlugin.hxx"
 #include "config.h"
-#include "EncoderAPI.hxx"
+#include "../EncoderAPI.hxx"
 #include "AudioFormat.hxx"
 #include "ConfigError.hxx"
 #include "util/Manual.hxx"
diff --git a/src/encoder/ShineEncoderPlugin.hxx b/src/encoder/plugins/ShineEncoderPlugin.hxx
index 8b1520a74..8b1520a74 100644
--- a/src/encoder/ShineEncoderPlugin.hxx
+++ b/src/encoder/plugins/ShineEncoderPlugin.hxx
diff --git a/src/encoder/TwolameEncoderPlugin.cxx b/src/encoder/plugins/TwolameEncoderPlugin.cxx
index 817590365..cea72bfdd 100644
--- a/src/encoder/TwolameEncoderPlugin.cxx
+++ b/src/encoder/plugins/TwolameEncoderPlugin.cxx
@@ -19,7 +19,7 @@
 
 #include "config.h"
 #include "TwolameEncoderPlugin.hxx"
-#include "EncoderAPI.hxx"
+#include "../EncoderAPI.hxx"
 #include "AudioFormat.hxx"
 #include "ConfigError.hxx"
 #include "util/NumberParser.hxx"
diff --git a/src/encoder/TwolameEncoderPlugin.hxx b/src/encoder/plugins/TwolameEncoderPlugin.hxx
index 531dd3e90..531dd3e90 100644
--- a/src/encoder/TwolameEncoderPlugin.hxx
+++ b/src/encoder/plugins/TwolameEncoderPlugin.hxx
diff --git a/src/encoder/VorbisEncoderPlugin.cxx b/src/encoder/plugins/VorbisEncoderPlugin.cxx
index d82d85c17..356d67571 100644
--- a/src/encoder/VorbisEncoderPlugin.cxx
+++ b/src/encoder/plugins/VorbisEncoderPlugin.cxx
@@ -21,7 +21,7 @@
 #include "VorbisEncoderPlugin.hxx"
 #include "OggStream.hxx"
 #include "OggSerial.hxx"
-#include "EncoderAPI.hxx"
+#include "../EncoderAPI.hxx"
 #include "tag/Tag.hxx"
 #include "AudioFormat.hxx"
 #include "ConfigError.hxx"
diff --git a/src/encoder/VorbisEncoderPlugin.hxx b/src/encoder/plugins/VorbisEncoderPlugin.hxx
index 80703bf88..80703bf88 100644
--- a/src/encoder/VorbisEncoderPlugin.hxx
+++ b/src/encoder/plugins/VorbisEncoderPlugin.hxx
diff --git a/src/encoder/WaveEncoderPlugin.cxx b/src/encoder/plugins/WaveEncoderPlugin.cxx
index 732226128..97a26e821 100644
--- a/src/encoder/WaveEncoderPlugin.cxx
+++ b/src/encoder/plugins/WaveEncoderPlugin.cxx
@@ -19,7 +19,7 @@
 
 #include "config.h"
 #include "WaveEncoderPlugin.hxx"
-#include "EncoderAPI.hxx"
+#include "../EncoderAPI.hxx"
 #include "system/ByteOrder.hxx"
 #include "util/Manual.hxx"
 #include "util/DynamicFifoBuffer.hxx"
diff --git a/src/encoder/WaveEncoderPlugin.hxx b/src/encoder/plugins/WaveEncoderPlugin.hxx
index 341b98adc..341b98adc 100644
--- a/src/encoder/WaveEncoderPlugin.hxx
+++ b/src/encoder/plugins/WaveEncoderPlugin.hxx