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-rw-r--r--src/encoder/plugins/VorbisEncoderPlugin.cxx364
1 files changed, 364 insertions, 0 deletions
diff --git a/src/encoder/plugins/VorbisEncoderPlugin.cxx b/src/encoder/plugins/VorbisEncoderPlugin.cxx
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+++ b/src/encoder/plugins/VorbisEncoderPlugin.cxx
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+/*
+ * 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 "VorbisEncoderPlugin.hxx"
+#include "OggStream.hxx"
+#include "OggSerial.hxx"
+#include "../EncoderAPI.hxx"
+#include "tag/Tag.hxx"
+#include "AudioFormat.hxx"
+#include "config/ConfigError.hxx"
+#include "util/NumberParser.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
+
+#include <vorbis/vorbisenc.h>
+
+#include <glib.h>
+
+struct vorbis_encoder {
+ /** the base class */
+ Encoder encoder;
+
+ /* configuration */
+
+ float quality;
+ int bitrate;
+
+ /* runtime information */
+
+ AudioFormat audio_format;
+
+ vorbis_dsp_state vd;
+ vorbis_block vb;
+ vorbis_info vi;
+
+ OggStream stream;
+
+ vorbis_encoder():encoder(vorbis_encoder_plugin) {}
+};
+
+static constexpr Domain vorbis_encoder_domain("vorbis_encoder");
+
+static bool
+vorbis_encoder_configure(struct vorbis_encoder *encoder,
+ const config_param &param, Error &error)
+{
+ const char *value = param.GetBlockValue("quality");
+ if (value != nullptr) {
+ /* a quality was configured (VBR) */
+
+ char *endptr;
+ encoder->quality = ParseDouble(value, &endptr);
+
+ if (*endptr != '\0' || encoder->quality < -1.0 ||
+ encoder->quality > 10.0) {
+ error.Format(config_domain,
+ "quality \"%s\" is not a number in the "
+ "range -1 to 10",
+ value);
+ return false;
+ }
+
+ if (param.GetBlockValue("bitrate") != nullptr) {
+ error.Set(config_domain,
+ "quality and bitrate are both defined");
+ return false;
+ }
+ } else {
+ /* a bit rate was configured */
+
+ value = param.GetBlockValue("bitrate");
+ if (value == nullptr) {
+ error.Set(config_domain,
+ "neither bitrate nor quality defined");
+ return false;
+ }
+
+ encoder->quality = -2.0;
+
+ char *endptr;
+ encoder->bitrate = ParseInt(value, &endptr);
+ if (*endptr != '\0' || encoder->bitrate <= 0) {
+ error.Set(config_domain,
+ "bitrate should be a positive integer");
+ return false;
+ }
+ }
+
+ return true;
+}
+
+static Encoder *
+vorbis_encoder_init(const config_param &param, Error &error)
+{
+ vorbis_encoder *encoder = new vorbis_encoder();
+
+ /* load configuration from "param" */
+ if (!vorbis_encoder_configure(encoder, param, error)) {
+ /* configuration has failed, roll back and return error */
+ delete encoder;
+ return nullptr;
+ }
+
+ return &encoder->encoder;
+}
+
+static void
+vorbis_encoder_finish(Encoder *_encoder)
+{
+ struct vorbis_encoder *encoder = (struct vorbis_encoder *)_encoder;
+
+ /* the real libvorbis/libogg cleanup was already performed by
+ vorbis_encoder_close(), so no real work here */
+ delete encoder;
+}
+
+static bool
+vorbis_encoder_reinit(struct vorbis_encoder *encoder, Error &error)
+{
+ vorbis_info_init(&encoder->vi);
+
+ if (encoder->quality >= -1.0) {
+ /* a quality was configured (VBR) */
+
+ if (0 != vorbis_encode_init_vbr(&encoder->vi,
+ encoder->audio_format.channels,
+ encoder->audio_format.sample_rate,
+ encoder->quality * 0.1)) {
+ error.Set(vorbis_encoder_domain,
+ "error initializing vorbis vbr");
+ vorbis_info_clear(&encoder->vi);
+ return false;
+ }
+ } else {
+ /* a bit rate was configured */
+
+ if (0 != vorbis_encode_init(&encoder->vi,
+ encoder->audio_format.channels,
+ encoder->audio_format.sample_rate, -1.0,
+ encoder->bitrate * 1000, -1.0)) {
+ error.Set(vorbis_encoder_domain,
+ "error initializing vorbis encoder");
+ vorbis_info_clear(&encoder->vi);
+ return false;
+ }
+ }
+
+ vorbis_analysis_init(&encoder->vd, &encoder->vi);
+ vorbis_block_init(&encoder->vd, &encoder->vb);
+ encoder->stream.Initialize(GenerateOggSerial());
+
+ return true;
+}
+
+static void
+vorbis_encoder_headerout(struct vorbis_encoder *encoder, vorbis_comment *vc)
+{
+ ogg_packet packet, comments, codebooks;
+
+ vorbis_analysis_headerout(&encoder->vd, vc,
+ &packet, &comments, &codebooks);
+
+ encoder->stream.PacketIn(packet);
+ encoder->stream.PacketIn(comments);
+ encoder->stream.PacketIn(codebooks);
+}
+
+static void
+vorbis_encoder_send_header(struct vorbis_encoder *encoder)
+{
+ vorbis_comment vc;
+
+ vorbis_comment_init(&vc);
+ vorbis_encoder_headerout(encoder, &vc);
+ vorbis_comment_clear(&vc);
+}
+
+static bool
+vorbis_encoder_open(Encoder *_encoder,
+ AudioFormat &audio_format,
+ Error &error)
+{
+ struct vorbis_encoder *encoder = (struct vorbis_encoder *)_encoder;
+
+ audio_format.format = SampleFormat::FLOAT;
+
+ encoder->audio_format = audio_format;
+
+ if (!vorbis_encoder_reinit(encoder, error))
+ return false;
+
+ vorbis_encoder_send_header(encoder);
+
+ return true;
+}
+
+static void
+vorbis_encoder_clear(struct vorbis_encoder *encoder)
+{
+ encoder->stream.Deinitialize();
+ vorbis_block_clear(&encoder->vb);
+ vorbis_dsp_clear(&encoder->vd);
+ vorbis_info_clear(&encoder->vi);
+}
+
+static void
+vorbis_encoder_close(Encoder *_encoder)
+{
+ struct vorbis_encoder *encoder = (struct vorbis_encoder *)_encoder;
+
+ vorbis_encoder_clear(encoder);
+}
+
+static void
+vorbis_encoder_blockout(struct vorbis_encoder *encoder)
+{
+ while (vorbis_analysis_blockout(&encoder->vd, &encoder->vb) == 1) {
+ vorbis_analysis(&encoder->vb, nullptr);
+ vorbis_bitrate_addblock(&encoder->vb);
+
+ ogg_packet packet;
+ while (vorbis_bitrate_flushpacket(&encoder->vd, &packet))
+ encoder->stream.PacketIn(packet);
+ }
+}
+
+static bool
+vorbis_encoder_flush(Encoder *_encoder, gcc_unused Error &error)
+{
+ struct vorbis_encoder *encoder = (struct vorbis_encoder *)_encoder;
+
+ encoder->stream.Flush();
+ return true;
+}
+
+static bool
+vorbis_encoder_pre_tag(Encoder *_encoder, gcc_unused Error &error)
+{
+ struct vorbis_encoder *encoder = (struct vorbis_encoder *)_encoder;
+
+ vorbis_analysis_wrote(&encoder->vd, 0);
+ vorbis_encoder_blockout(encoder);
+
+ /* reinitialize vorbis_dsp_state and vorbis_block to reset the
+ end-of-stream marker */
+ vorbis_block_clear(&encoder->vb);
+ vorbis_dsp_clear(&encoder->vd);
+ vorbis_analysis_init(&encoder->vd, &encoder->vi);
+ vorbis_block_init(&encoder->vd, &encoder->vb);
+
+ encoder->stream.Flush();
+ return true;
+}
+
+static void
+copy_tag_to_vorbis_comment(vorbis_comment *vc, const Tag *tag)
+{
+ for (const auto &item : *tag) {
+ char *name = g_ascii_strup(tag_item_names[item.type], -1);
+ vorbis_comment_add_tag(vc, name, item.value);
+ g_free(name);
+ }
+}
+
+static bool
+vorbis_encoder_tag(Encoder *_encoder, const Tag *tag,
+ gcc_unused Error &error)
+{
+ struct vorbis_encoder *encoder = (struct vorbis_encoder *)_encoder;
+ vorbis_comment comment;
+
+ /* write the vorbis_comment object */
+
+ vorbis_comment_init(&comment);
+ copy_tag_to_vorbis_comment(&comment, tag);
+
+ /* reset ogg_stream_state and begin a new stream */
+
+ encoder->stream.Reinitialize(GenerateOggSerial());
+
+ /* send that vorbis_comment to the ogg_stream_state */
+
+ vorbis_encoder_headerout(encoder, &comment);
+ vorbis_comment_clear(&comment);
+
+ return true;
+}
+
+static void
+interleaved_to_vorbis_buffer(float **dest, const float *src,
+ unsigned num_frames, unsigned num_channels)
+{
+ for (unsigned i = 0; i < num_frames; i++)
+ for (unsigned j = 0; j < num_channels; j++)
+ dest[j][i] = *src++;
+}
+
+static bool
+vorbis_encoder_write(Encoder *_encoder,
+ const void *data, size_t length,
+ gcc_unused Error &error)
+{
+ struct vorbis_encoder *encoder = (struct vorbis_encoder *)_encoder;
+
+ unsigned num_frames = length / encoder->audio_format.GetFrameSize();
+
+ /* this is for only 16-bit audio */
+
+ interleaved_to_vorbis_buffer(vorbis_analysis_buffer(&encoder->vd,
+ num_frames),
+ (const float *)data,
+ num_frames,
+ encoder->audio_format.channels);
+
+ vorbis_analysis_wrote(&encoder->vd, num_frames);
+ vorbis_encoder_blockout(encoder);
+ return true;
+}
+
+static size_t
+vorbis_encoder_read(Encoder *_encoder, void *dest, size_t length)
+{
+ struct vorbis_encoder *encoder = (struct vorbis_encoder *)_encoder;
+
+ return encoder->stream.PageOut(dest, length);
+}
+
+static const char *
+vorbis_encoder_get_mime_type(gcc_unused Encoder *_encoder)
+{
+ return "audio/ogg";
+}
+
+const EncoderPlugin vorbis_encoder_plugin = {
+ "vorbis",
+ vorbis_encoder_init,
+ vorbis_encoder_finish,
+ vorbis_encoder_open,
+ vorbis_encoder_close,
+ vorbis_encoder_pre_tag,
+ vorbis_encoder_flush,
+ vorbis_encoder_pre_tag,
+ vorbis_encoder_tag,
+ vorbis_encoder_write,
+ vorbis_encoder_read,
+ vorbis_encoder_get_mime_type,
+};