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Diffstat (limited to '')
-rw-r--r-- | src/encoder/VorbisEncoderPlugin.cxx | 377 |
1 files changed, 377 insertions, 0 deletions
diff --git a/src/encoder/VorbisEncoderPlugin.cxx b/src/encoder/VorbisEncoderPlugin.cxx new file mode 100644 index 000000000..dc7ef0d5e --- /dev/null +++ b/src/encoder/VorbisEncoderPlugin.cxx @@ -0,0 +1,377 @@ +/* + * Copyright (C) 2003-2012 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 "encoder_api.h" +#include "encoder_plugin.h" +#include "tag.h" +#include "audio_format.h" +#include "mpd_error.h" + +#include <vorbis/vorbisenc.h> + +#include <assert.h> + +#undef G_LOG_DOMAIN +#define G_LOG_DOMAIN "vorbis_encoder" + +struct vorbis_encoder { + /** the base class */ + struct encoder encoder; + + /* configuration */ + + float quality; + int bitrate; + + /* runtime information */ + + struct audio_format audio_format; + + vorbis_dsp_state vd; + vorbis_block vb; + vorbis_info vi; + + OggStream stream; + + vorbis_encoder() { + encoder_struct_init(&encoder, &vorbis_encoder_plugin); + } +}; + +static inline GQuark +vorbis_encoder_quark(void) +{ + return g_quark_from_static_string("vorbis_encoder"); +} + +static bool +vorbis_encoder_configure(struct vorbis_encoder *encoder, + const struct config_param *param, GError **error) +{ + const char *value = config_get_block_string(param, "quality", nullptr); + if (value != nullptr) { + /* a quality was configured (VBR) */ + + char *endptr; + encoder->quality = g_ascii_strtod(value, &endptr); + + if (*endptr != '\0' || encoder->quality < -1.0 || + encoder->quality > 10.0) { + g_set_error(error, vorbis_encoder_quark(), 0, + "quality \"%s\" is not a number in the " + "range -1 to 10, line %i", + value, param->line); + return false; + } + + if (config_get_block_string(param, "bitrate", nullptr) != nullptr) { + g_set_error(error, vorbis_encoder_quark(), 0, + "quality and bitrate are " + "both defined (line %i)", + param->line); + return false; + } + } else { + /* a bit rate was configured */ + + value = config_get_block_string(param, "bitrate", nullptr); + if (value == nullptr) { + g_set_error(error, vorbis_encoder_quark(), 0, + "neither bitrate nor quality defined " + "at line %i", + param->line); + return false; + } + + encoder->quality = -2.0; + + char *endptr; + encoder->bitrate = g_ascii_strtoll(value, &endptr, 10); + if (*endptr != '\0' || encoder->bitrate <= 0) { + g_set_error(error, vorbis_encoder_quark(), 0, + "bitrate at line %i should be a positive integer", + param->line); + return false; + } + } + + return true; +} + +static struct encoder * +vorbis_encoder_init(const struct config_param *param, GError **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(struct 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, GError **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)) { + g_set_error(error, vorbis_encoder_quark(), 0, + "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)) { + g_set_error(error, vorbis_encoder_quark(), 0, + "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(g_random_int()); + + 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(struct encoder *_encoder, + struct audio_format *audio_format, + GError **error) +{ + struct vorbis_encoder *encoder = (struct vorbis_encoder *)_encoder; + + audio_format->format = SAMPLE_FORMAT_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(struct 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(struct encoder *_encoder, G_GNUC_UNUSED GError **error) +{ + struct vorbis_encoder *encoder = (struct vorbis_encoder *)_encoder; + + encoder->stream.Flush(); + return true; +} + +static bool +vorbis_encoder_pre_tag(struct encoder *_encoder, G_GNUC_UNUSED GError **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 struct tag *tag) +{ + for (unsigned i = 0; i < tag->num_items; i++) { + struct tag_item *item = tag->items[i]; + 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(struct encoder *_encoder, const struct tag *tag, + G_GNUC_UNUSED GError **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(g_random_int()); + + /* 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(struct encoder *_encoder, + const void *data, size_t length, + G_GNUC_UNUSED GError **error) +{ + struct vorbis_encoder *encoder = (struct vorbis_encoder *)_encoder; + + unsigned num_frames = length + / audio_format_frame_size(&encoder->audio_format); + + /* 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(struct 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(G_GNUC_UNUSED struct encoder *_encoder) +{ + return "audio/ogg"; +} + +const struct encoder_plugin 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, +}; |