1 files changed, 271 insertions, 0 deletions
diff --git a/src/encoder/plugins/ShineEncoderPlugin.cxx b/src/encoder/plugins/ShineEncoderPlugin.cxx
new file mode 100644
index 000000000..5b1b95a27
--- /dev/null
+++ b/src/encoder/plugins/ShineEncoderPlugin.cxx
@@ -0,0 +1,271 @@
+/*
+ * 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 "ShineEncoderPlugin.hxx"
+#include "config.h"
+#include "../EncoderAPI.hxx"
+#include "AudioFormat.hxx"
+#include "ConfigError.hxx"
+#include "util/Manual.hxx"
+#include "util/NumberParser.hxx"
+#include "util/DynamicFifoBuffer.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
+
+extern "C"
+{
+#include <shine/layer3.h>
+}
+
+static constexpr size_t BUFFER_INIT_SIZE = 8192;
+static constexpr unsigned CHANNELS = 2;
+
+struct ShineEncoder {
+	Encoder encoder;
+
+	AudioFormat audio_format;
+
+	shine_t shine;
+
+	shine_config_t config;
+
+	size_t frame_size;
+	size_t input_pos;
+	int16_t *stereo[CHANNELS];
+
+	Manual<DynamicFifoBuffer<uint8_t>> output_buffer;
+
+	ShineEncoder():encoder(shine_encoder_plugin){}
+
+	bool Configure(const config_param &param, Error &error);
+
+	bool Setup(Error &error);
+
+	bool WriteChunk(bool flush);
+};
+
+static constexpr Domain shine_encoder_domain("shine_encoder");
+
+inline bool
+ShineEncoder::Configure(const config_param &param,
+			 gcc_unused Error &error)
+{
+	shine_set_config_mpeg_defaults(&config.mpeg);
+	config.mpeg.bitr = param.GetBlockValue("bitrate", 128);
+
+	return true;
+}
+
+static Encoder *
+shine_encoder_init(const config_param &param, Error &error)
+{
+	ShineEncoder *encoder = new ShineEncoder();
+
+	/* load configuration from "param" */
+	if (!encoder->Configure(param, error)) {
+		/* configuration has failed, roll back and return error */
+		delete encoder;
+		return nullptr;
+	}
+
+	return &encoder->encoder;
+}
+
+static void
+shine_encoder_finish(Encoder *_encoder)
+{
+	ShineEncoder *encoder = (ShineEncoder *)_encoder;
+
+	delete encoder;
+}
+
+inline bool
+ShineEncoder::Setup(Error &error)
+{
+	config.mpeg.mode = audio_format.channels == 2 ? STEREO : MONO;
+	config.wave.samplerate = audio_format.sample_rate;
+	config.wave.channels =
+		audio_format.channels == 2 ? PCM_STEREO : PCM_MONO;
+
+	if (shine_check_config(config.wave.samplerate, config.mpeg.bitr) < 0) {
+		error.Format(config_domain,
+			     "error configuring shine. "
+			     "samplerate %d and bitrate %d configuration"
+			     " not supported.",
+			     config.wave.samplerate,
+			     config.mpeg.bitr);
+
+		return false;
+	}
+
+	shine = shine_initialise(&config);
+
+	if (!shine) {
+		error.Format(config_domain,
+			     "error initializing shine.");
+
+		return false;
+	}
+
+	frame_size = shine_samples_per_pass(shine);
+
+	return true;
+}
+
+static bool
+shine_encoder_open(Encoder *_encoder, AudioFormat &audio_format, Error &error)
+{
+	ShineEncoder *encoder = (ShineEncoder *)_encoder;
+
+	audio_format.format = SampleFormat::S16;
+	audio_format.channels = CHANNELS;
+	encoder->audio_format = audio_format;
+
+	if (!encoder->Setup(error))
+		return false;
+
+	encoder->stereo[0] = new int16_t[encoder->frame_size];
+	encoder->stereo[1] = new int16_t[encoder->frame_size];
+	/* workaround for bug:
+	   https://github.com/savonet/shine/issues/11 */
+	encoder->input_pos = SHINE_MAX_SAMPLES + 1;
+
+	encoder->output_buffer.Construct(BUFFER_INIT_SIZE);
+
+	return true;
+}
+
+static void
+shine_encoder_close(Encoder *_encoder)
+{
+	ShineEncoder *encoder = (ShineEncoder *)_encoder;
+
+	if (encoder->input_pos > SHINE_MAX_SAMPLES) {
+		/* write zero chunk */
+		encoder->input_pos = 0;
+		encoder->WriteChunk(true);
+	}
+
+	shine_close(encoder->shine);
+	delete[] encoder->stereo[0];
+	delete[] encoder->stereo[1];
+	encoder->output_buffer.Destruct();
+}
+
+bool
+ShineEncoder::WriteChunk(bool flush)
+{
+	if (flush || input_pos == frame_size) {
+		long written;
+
+		if (flush) {
+			/* fill remaining with 0s */
+			for (; input_pos < frame_size; input_pos++) {
+				stereo[0][input_pos] = stereo[1][input_pos] = 0;
+			}
+		}
+
+		const uint8_t *out =
+			shine_encode_buffer(shine, stereo, &written);
+
+		if (written > 0)
+			output_buffer->Append(out, written);
+
+		input_pos = 0;
+	}
+
+	return true;
+}
+
+static bool
+shine_encoder_write(Encoder *_encoder,
+		    const void *_data, size_t length,
+		    gcc_unused Error &error)
+{
+	ShineEncoder *encoder = (ShineEncoder *)_encoder;
+	const int16_t *data = (const int16_t*)_data;
+	length /= sizeof(*data) * encoder->audio_format.channels;
+	size_t written = 0;
+
+	if (encoder->input_pos > SHINE_MAX_SAMPLES) {
+		encoder->input_pos = 0;
+	}
+
+	/* write all data to de-interleaved buffers */
+	while (written < length) {
+		for (;
+		     written < length
+			     && encoder->input_pos < encoder->frame_size;
+		     written++, encoder->input_pos++) {
+			const size_t base =
+				written * encoder->audio_format.channels;
+			encoder->stereo[0][encoder->input_pos] = data[base];
+			encoder->stereo[1][encoder->input_pos] = data[base + 1];
+		}
+		/* write if chunk is filled */
+		encoder->WriteChunk(false);
+	}
+
+	return true;
+}
+
+static bool
+shine_encoder_flush(Encoder *_encoder, gcc_unused Error &error)
+{
+	ShineEncoder *encoder = (ShineEncoder *)_encoder;
+	long written;
+
+	/* flush buffers and flush shine */
+	encoder->WriteChunk(true);
+	const uint8_t *data = shine_flush(encoder->shine, &written);
+
+	if (written > 0)
+		encoder->output_buffer->Append(data, written);
+
+	return true;
+}
+
+static size_t
+shine_encoder_read(Encoder *_encoder, void *dest, size_t length)
+{
+	ShineEncoder *encoder = (ShineEncoder *)_encoder;
+
+	return encoder->output_buffer->Read((uint8_t *)dest, length);
+}
+
+static const char *
+shine_encoder_get_mime_type(gcc_unused Encoder *_encoder)
+{
+	return "audio/mpeg";
+}
+
+const EncoderPlugin shine_encoder_plugin = {
+	"shine",
+	shine_encoder_init,
+	shine_encoder_finish,
+	shine_encoder_open,
+	shine_encoder_close,
+	shine_encoder_flush,
+	shine_encoder_flush,
+	nullptr,
+	nullptr,
+	shine_encoder_write,
+	shine_encoder_read,
+	shine_encoder_get_mime_type,
+};