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Diffstat (limited to 'src/encoder/OpusEncoderPlugin.cxx')
| -rw-r--r-- | src/encoder/OpusEncoderPlugin.cxx | 420 |
1 files changed, 0 insertions, 420 deletions
diff --git a/src/encoder/OpusEncoderPlugin.cxx b/src/encoder/OpusEncoderPlugin.cxx deleted file mode 100644 index 672ebf5e4..000000000 --- a/src/encoder/OpusEncoderPlugin.cxx +++ /dev/null @@ -1,420 +0,0 @@ -/* - * 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 "OpusEncoderPlugin.hxx" -#include "OggStream.hxx" -#include "OggSerial.hxx" -#include "EncoderAPI.hxx" -#include "AudioFormat.hxx" -#include "ConfigError.hxx" -#include "util/Error.hxx" -#include "util/Domain.hxx" -#include "system/ByteOrder.hxx" - -#include <opus.h> -#include <ogg/ogg.h> - -#include <glib.h> - -#include <assert.h> -#include <stdlib.h> - -struct opus_encoder { - /** the base class */ - Encoder encoder; - - /* configuration */ - - opus_int32 bitrate; - int complexity; - int signal; - - /* runtime information */ - - AudioFormat audio_format; - - size_t frame_size; - - size_t buffer_frames, buffer_size, buffer_position; - uint8_t *buffer; - - OpusEncoder *enc; - - unsigned char buffer2[1275 * 3 + 7]; - - OggStream stream; - - int lookahead; - - ogg_int64_t packetno; - - ogg_int64_t granulepos; - - opus_encoder():encoder(opus_encoder_plugin) {} -}; - -static constexpr Domain opus_encoder_domain("opus_encoder"); - -static bool -opus_encoder_configure(struct opus_encoder *encoder, - const config_param ¶m, Error &error) -{ - const char *value = param.GetBlockValue("bitrate", "auto"); - if (strcmp(value, "auto") == 0) - encoder->bitrate = OPUS_AUTO; - else if (strcmp(value, "max") == 0) - encoder->bitrate = OPUS_BITRATE_MAX; - else { - char *endptr; - encoder->bitrate = strtoul(value, &endptr, 10); - if (endptr == value || *endptr != 0 || - encoder->bitrate < 500 || encoder->bitrate > 512000) { - error.Set(config_domain, "Invalid bit rate"); - return false; - } - } - - encoder->complexity = param.GetBlockValue("complexity", 10u); - if (encoder->complexity > 10) { - error.Format(config_domain, "Invalid complexity"); - return false; - } - - value = param.GetBlockValue("signal", "auto"); - if (strcmp(value, "auto") == 0) - encoder->signal = OPUS_AUTO; - else if (strcmp(value, "voice") == 0) - encoder->signal = OPUS_SIGNAL_VOICE; - else if (strcmp(value, "music") == 0) - encoder->signal = OPUS_SIGNAL_MUSIC; - else { - error.Format(config_domain, "Invalid signal"); - return false; - } - - return true; -} - -static Encoder * -opus_encoder_init(const config_param ¶m, Error &error) -{ - opus_encoder *encoder = new opus_encoder(); - - /* load configuration from "param" */ - if (!opus_encoder_configure(encoder, param, error)) { - /* configuration has failed, roll back and return error */ - delete encoder; - return NULL; - } - - return &encoder->encoder; -} - -static void -opus_encoder_finish(Encoder *_encoder) -{ - struct opus_encoder *encoder = (struct opus_encoder *)_encoder; - - /* the real libopus cleanup was already performed by - opus_encoder_close(), so no real work here */ - delete encoder; -} - -static bool -opus_encoder_open(Encoder *_encoder, - AudioFormat &audio_format, - Error &error) -{ - struct opus_encoder *encoder = (struct opus_encoder *)_encoder; - - /* libopus supports only 48 kHz */ - audio_format.sample_rate = 48000; - - if (audio_format.channels > 2) - audio_format.channels = 1; - - switch (audio_format.format) { - case SampleFormat::S16: - case SampleFormat::FLOAT: - break; - - case SampleFormat::S8: - audio_format.format = SampleFormat::S16; - break; - - default: - audio_format.format = SampleFormat::FLOAT; - break; - } - - encoder->audio_format = audio_format; - encoder->frame_size = audio_format.GetFrameSize(); - - int error_code; - encoder->enc = opus_encoder_create(audio_format.sample_rate, - audio_format.channels, - OPUS_APPLICATION_AUDIO, - &error_code); - if (encoder->enc == nullptr) { - error.Set(opus_encoder_domain, error_code, - opus_strerror(error_code)); - return false; - } - - opus_encoder_ctl(encoder->enc, OPUS_SET_BITRATE(encoder->bitrate)); - opus_encoder_ctl(encoder->enc, - OPUS_SET_COMPLEXITY(encoder->complexity)); - opus_encoder_ctl(encoder->enc, OPUS_SET_SIGNAL(encoder->signal)); - - opus_encoder_ctl(encoder->enc, OPUS_GET_LOOKAHEAD(&encoder->lookahead)); - - encoder->buffer_frames = audio_format.sample_rate / 50; - encoder->buffer_size = encoder->frame_size * encoder->buffer_frames; - encoder->buffer_position = 0; - encoder->buffer = (unsigned char *)g_malloc(encoder->buffer_size); - - encoder->stream.Initialize(GenerateOggSerial()); - encoder->packetno = 0; - - return true; -} - -static void -opus_encoder_close(Encoder *_encoder) -{ - struct opus_encoder *encoder = (struct opus_encoder *)_encoder; - - encoder->stream.Deinitialize(); - g_free(encoder->buffer); - opus_encoder_destroy(encoder->enc); -} - -static bool -opus_encoder_do_encode(struct opus_encoder *encoder, bool eos, - Error &error) -{ - assert(encoder->buffer_position == encoder->buffer_size); - - opus_int32 result = - encoder->audio_format.format == SampleFormat::S16 - ? opus_encode(encoder->enc, - (const opus_int16 *)encoder->buffer, - encoder->buffer_frames, - encoder->buffer2, - sizeof(encoder->buffer2)) - : opus_encode_float(encoder->enc, - (const float *)encoder->buffer, - encoder->buffer_frames, - encoder->buffer2, - sizeof(encoder->buffer2)); - if (result < 0) { - error.Set(opus_encoder_domain, "Opus encoder error"); - return false; - } - - encoder->granulepos += encoder->buffer_frames; - - ogg_packet packet; - packet.packet = encoder->buffer2; - packet.bytes = result; - packet.b_o_s = false; - packet.e_o_s = eos; - packet.granulepos = encoder->granulepos; - packet.packetno = encoder->packetno++; - encoder->stream.PacketIn(packet); - - encoder->buffer_position = 0; - - return true; -} - -static bool -opus_encoder_end(Encoder *_encoder, Error &error) -{ - struct opus_encoder *encoder = (struct opus_encoder *)_encoder; - - encoder->stream.Flush(); - - memset(encoder->buffer + encoder->buffer_position, 0, - encoder->buffer_size - encoder->buffer_position); - encoder->buffer_position = encoder->buffer_size; - - return opus_encoder_do_encode(encoder, true, error); -} - -static bool -opus_encoder_flush(Encoder *_encoder, gcc_unused Error &error) -{ - struct opus_encoder *encoder = (struct opus_encoder *)_encoder; - - encoder->stream.Flush(); - return true; -} - -static bool -opus_encoder_write_silence(struct opus_encoder *encoder, unsigned fill_frames, - Error &error) -{ - size_t fill_bytes = fill_frames * encoder->frame_size; - - while (fill_bytes > 0) { - size_t nbytes = - encoder->buffer_size - encoder->buffer_position; - if (nbytes > fill_bytes) - nbytes = fill_bytes; - - memset(encoder->buffer + encoder->buffer_position, - 0, nbytes); - encoder->buffer_position += nbytes; - fill_bytes -= nbytes; - - if (encoder->buffer_position == encoder->buffer_size && - !opus_encoder_do_encode(encoder, false, error)) - return false; - } - - return true; -} - -static bool -opus_encoder_write(Encoder *_encoder, - const void *_data, size_t length, - Error &error) -{ - struct opus_encoder *encoder = (struct opus_encoder *)_encoder; - const uint8_t *data = (const uint8_t *)_data; - - if (encoder->lookahead > 0) { - /* generate some silence at the beginning of the - stream */ - - assert(encoder->buffer_position == 0); - - if (!opus_encoder_write_silence(encoder, encoder->lookahead, - error)) - return false; - - encoder->lookahead = 0; - } - - while (length > 0) { - size_t nbytes = - encoder->buffer_size - encoder->buffer_position; - if (nbytes > length) - nbytes = length; - - memcpy(encoder->buffer + encoder->buffer_position, - data, nbytes); - data += nbytes; - length -= nbytes; - encoder->buffer_position += nbytes; - - if (encoder->buffer_position == encoder->buffer_size && - !opus_encoder_do_encode(encoder, false, error)) - return false; - } - - return true; -} - -static void -opus_encoder_generate_head(struct opus_encoder *encoder) -{ - unsigned char header[19]; - memcpy(header, "OpusHead", 8); - header[8] = 1; - header[9] = encoder->audio_format.channels; - *(uint16_t *)(header + 10) = ToLE16(encoder->lookahead); - *(uint32_t *)(header + 12) = - ToLE32(encoder->audio_format.sample_rate); - header[16] = 0; - header[17] = 0; - header[18] = 0; - - ogg_packet packet; - packet.packet = header; - packet.bytes = 19; - packet.b_o_s = true; - packet.e_o_s = false; - packet.granulepos = 0; - packet.packetno = encoder->packetno++; - encoder->stream.PacketIn(packet); - encoder->stream.Flush(); -} - -static void -opus_encoder_generate_tags(struct opus_encoder *encoder) -{ - const char *version = opus_get_version_string(); - size_t version_length = strlen(version); - - size_t comments_size = 8 + 4 + version_length + 4; - unsigned char *comments = (unsigned char *)g_malloc(comments_size); - memcpy(comments, "OpusTags", 8); - *(uint32_t *)(comments + 8) = ToLE32(version_length); - memcpy(comments + 12, version, version_length); - *(uint32_t *)(comments + 12 + version_length) = ToLE32(0); - - ogg_packet packet; - packet.packet = comments; - packet.bytes = comments_size; - packet.b_o_s = false; - packet.e_o_s = false; - packet.granulepos = 0; - packet.packetno = encoder->packetno++; - encoder->stream.PacketIn(packet); - encoder->stream.Flush(); - - g_free(comments); -} - -static size_t -opus_encoder_read(Encoder *_encoder, void *dest, size_t length) -{ - struct opus_encoder *encoder = (struct opus_encoder *)_encoder; - - if (encoder->packetno == 0) - opus_encoder_generate_head(encoder); - else if (encoder->packetno == 1) - opus_encoder_generate_tags(encoder); - - return encoder->stream.PageOut(dest, length); -} - -static const char * -opus_encoder_get_mime_type(gcc_unused Encoder *_encoder) -{ - return "audio/ogg"; -} - -const EncoderPlugin opus_encoder_plugin = { - "opus", - opus_encoder_init, - opus_encoder_finish, - opus_encoder_open, - opus_encoder_close, - opus_encoder_end, - opus_encoder_flush, - nullptr, - nullptr, - opus_encoder_write, - opus_encoder_read, - opus_encoder_get_mime_type, -}; |