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[79.124.17.100]) by mx.google.com with ESMTP id eb13-20020a0564020d0d00b0056ba005a4bdsi3678410edb.288.2024.03.26.09.48.04; Tue, 26 Mar 2024 09:48:34 -0700 (PDT) Received-SPF: pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) client-ip=79.124.17.100; Authentication-Results: mx.google.com; spf=pass (google.com: domain of ffmpeg-devel-bounces@ffmpeg.org designates 79.124.17.100 as permitted sender) smtp.mailfrom=ffmpeg-devel-bounces@ffmpeg.org Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id D8F7D68D61F; Tue, 26 Mar 2024 18:47:53 +0200 (EET) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from mail-yb1-f202.google.com (mail-yb1-f202.google.com [209.85.219.202]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 1E25068D431 for ; Tue, 26 Mar 2024 18:47:46 +0200 (EET) Received: by mail-yb1-f202.google.com with SMTP id 3f1490d57ef6-dd8e82dd47eso7864367276.2 for ; Tue, 26 Mar 2024 09:47:46 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1711471665; x=1712076465; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=fNHhSgiP0yvN0gOku38TamTG5zPZBHWgJMsHhHGOkEE=; b=PjiJRNyiX3zhvZwDVMSbbM7nDwNS4+v3PHzko5SWreJ5rd6wIWM4+Nj999iUcf4z0E UJaxb+gxaN/diQT/EPbNx13SFL++YwaJbfaU1xh5HU7W0brMPJl309zcv2NDSay4Vyn4 1AgmYmaq/y1sDHJSTa0HB9+Tn8wsNwThs9AqcnVcLUYL+BJk7CiIe5r+lTyTQjNcAUQW xE6ysjpqjO+DiqoXApdQNKya6QiWktPkZfxTbaW4nOv3sK2ze+uLaas9qocvYuDLWQr6 RG94AFqqBzsnJgG2YsO2QNkP56GqNakuZwyG1nhj09BX9Cnga6Hc//mhacxboFmHhhKO 4d6w== X-Gm-Message-State: AOJu0YywbHOUCykHiMvvCr0pWoGPHOsFjkI5c9oAiDDNsXKAE74+LCij zb6pV6fIy3FoTGxWU6PxVVI9g7fPsoM/MS2qwkUIzS7R1UmLwNCcmP4G72RNEoQRDlN3QBNgHpv XmThvjz3Mlozy4Et707yWNlPw9wbP5j0wL0H6ZMDzcU7Oq2B8Vb4fyFW8Lnqr3XdiCF+CLQldp6 NHsMQazUkdee0k3NgG1VSRMjlsluXLUxqM/UEp+36HpsRa X-Received: from asoulier-us.c.googlers.com ([fda3:e722:ac3:cc00:20:ed76:c0a8:f79]) (user=asoulier job=sendgmr) by 2002:a05:6902:110d:b0:dcd:2f3e:4d18 with SMTP id o13-20020a056902110d00b00dcd2f3e4d18mr551674ybu.12.1711471664787; Tue, 26 Mar 2024 09:47:44 -0700 (PDT) Date: Tue, 26 Mar 2024 16:47:36 +0000 In-Reply-To: <20240326164739.153011-1-asoulier@google.com> Mime-Version: 1.0 References: <20240326164739.153011-1-asoulier@google.com> X-Mailer: git-send-email 2.44.0.396.g6e790dbe36-goog Message-ID: <20240326164739.153011-2-asoulier@google.com> To: ffmpeg-devel@ffmpeg.org Subject: [FFmpeg-devel] [PATCH 2/5] avcodec/liblc3: Add encoding/decoding support of LC3 audio codec X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Antoine Soulier via ffmpeg-devel From: Antoine Soulier Reply-To: FFmpeg development discussions and patches Cc: Antoine Soulier Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" X-TUID: iseuyz4ZN+sL The LC3 audio codec is the default codec of Bluetooth LE audio. This is a wrapper over the liblc3 library (https://github.com/google/liblc3). Signed-off-by: Antoine Soulier Signed-off-by: Antoine SOULIER --- libavcodec/Makefile | 3 + libavcodec/allcodecs.c | 3 + libavcodec/codec_desc.c | 14 +++ libavcodec/codec_id.h | 2 + libavcodec/liblc3dec.c | 146 ++++++++++++++++++++++++++++++ libavcodec/liblc3enc.c | 191 ++++++++++++++++++++++++++++++++++++++++ 6 files changed, 359 insertions(+) create mode 100644 libavcodec/liblc3dec.c create mode 100644 libavcodec/liblc3enc.c diff --git a/libavcodec/Makefile b/libavcodec/Makefile index 708434ac76..7d2cf3076d 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -1123,6 +1123,9 @@ OBJS-$(CONFIG_LIBILBC_ENCODER) += libilbc.o OBJS-$(CONFIG_LIBJXL_DECODER) += libjxldec.o libjxl.o OBJS-$(CONFIG_LIBJXL_ENCODER) += libjxlenc.o libjxl.o OBJS-$(CONFIG_LIBKVAZAAR_ENCODER) += libkvazaar.o +OBJS-$(CONFIG_LIBLC3_ENCODER) += liblc3enc.o +OBJS-$(CONFIG_LIBLC3_LC3_DECODER) += liblc3dec.o +OBJS-$(CONFIG_LIBLC3_LC3PLUS_DECODER) += liblc3dec.o OBJS-$(CONFIG_LIBMP3LAME_ENCODER) += libmp3lame.o OBJS-$(CONFIG_LIBOPENCORE_AMRNB_DECODER) += libopencore-amr.o OBJS-$(CONFIG_LIBOPENCORE_AMRNB_ENCODER) += libopencore-amr.o diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c index 2386b450a6..29aedaeac6 100644 --- a/libavcodec/allcodecs.c +++ b/libavcodec/allcodecs.c @@ -776,6 +776,9 @@ extern const FFCodec ff_libilbc_encoder; extern const FFCodec ff_libilbc_decoder; extern const FFCodec ff_libjxl_decoder; extern const FFCodec ff_libjxl_encoder; +extern const FFCodec ff_liblc3_encoder; +extern const FFCodec ff_liblc3_lc3_decoder; +extern const FFCodec ff_liblc3_lc3plus_decoder; extern const FFCodec ff_libmp3lame_encoder; extern const FFCodec ff_libopencore_amrnb_encoder; extern const FFCodec ff_libopencore_amrnb_decoder; diff --git a/libavcodec/codec_desc.c b/libavcodec/codec_desc.c index 3bab86db62..230bba2a09 100644 --- a/libavcodec/codec_desc.c +++ b/libavcodec/codec_desc.c @@ -3425,6 +3425,20 @@ static const AVCodecDescriptor codec_descriptors[] = { .long_name = NULL_IF_CONFIG_SMALL("QOA (Quite OK Audio)"), .props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY, }, + { + .id = AV_CODEC_ID_LC3, + .type = AVMEDIA_TYPE_AUDIO, + .name = "lc3", + .long_name = NULL_IF_CONFIG_SMALL("LC3 (Low Complexity Communication Codec)"), + .props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY, + }, + { + .id = AV_CODEC_ID_LC3_PLUS, + .type = AVMEDIA_TYPE_AUDIO, + .name = "lc3_plus", + .long_name = NULL_IF_CONFIG_SMALL("LC3plus (Low Complexity Communication Codec plus)"), + .props = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSY, + }, /* subtitle codecs */ { diff --git a/libavcodec/codec_id.h b/libavcodec/codec_id.h index c8dc21da74..7e4cb39049 100644 --- a/libavcodec/codec_id.h +++ b/libavcodec/codec_id.h @@ -543,6 +543,8 @@ enum AVCodecID { AV_CODEC_ID_AC4, AV_CODEC_ID_OSQ, AV_CODEC_ID_QOA, + AV_CODEC_ID_LC3, + AV_CODEC_ID_LC3_PLUS, /* subtitle codecs */ AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs. diff --git a/libavcodec/liblc3dec.c b/libavcodec/liblc3dec.c new file mode 100644 index 0000000000..e97cecc68f --- /dev/null +++ b/libavcodec/liblc3dec.c @@ -0,0 +1,146 @@ +/* + * LC3 decoder wrapper + * Copyright (C) 2024 Antoine Soulier + * + * This file is part of FFmpeg. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include + +#include "libavutil/intreadwrite.h" + +#include "avcodec.h" +#include "codec.h" +#include "codec_internal.h" +#include "decode.h" +#include "internal.h" + +#define DECODER_MAX_CHANNELS 2 + +typedef struct LibLC3DecContext { + int frame_us, srate_hz; + bool hr_mode; + lc3_decoder_t decoder[DECODER_MAX_CHANNELS]; +} LibLC3DecContext; + +static av_cold int liblc3_decode_init(AVCodecContext *avctx) +{ + LibLC3DecContext *liblc3 = avctx->priv_data; + int channels = avctx->ch_layout.nb_channels; + unsigned decoder_size; + + if (avctx->extradata_size < 2) + return AVERROR_INVALIDDATA; + + liblc3->frame_us = AV_RL16(avctx->extradata + 0); + liblc3->srate_hz = avctx->sample_rate; + liblc3->hr_mode = avctx->extradata_size >= 6 && + AV_RL16(avctx->extradata + 4); + + av_log(avctx, AV_LOG_INFO, + "Decoding %.1f ms frames\n", liblc3->frame_us / 1e3f); + if (liblc3->hr_mode) + av_log(avctx, AV_LOG_INFO, "High-resolution mode enabled\n"); + + decoder_size = lc3_hr_decoder_size( + liblc3->hr_mode, liblc3->frame_us, liblc3->srate_hz); + if (!decoder_size) + return AVERROR_INVALIDDATA; + + for (int ch = 0; ch < channels; ch++) { + liblc3->decoder[ch] = lc3_hr_setup_decoder(liblc3->hr_mode, + liblc3->frame_us, liblc3->srate_hz, 0, av_malloc(decoder_size)); + if (!liblc3->decoder[ch]) + return AVERROR(ENOMEM); + } + + avctx->sample_fmt = AV_SAMPLE_FMT_FLTP; + avctx->delay = lc3_hr_delay_samples( + liblc3->hr_mode, liblc3->frame_us, liblc3->srate_hz); + avctx->internal->skip_samples = avctx->delay; + + return 0; +} + +static av_cold int liblc3_decode_close(AVCodecContext *avctx) +{ + LibLC3DecContext *liblc3 = avctx->priv_data; + int channels = avctx->ch_layout.nb_channels; + + for (int ch = 0; ch < channels; ch++) + av_free(liblc3->decoder[ch]); + + return 0; +} + +static int liblc3_decode(AVCodecContext *avctx, AVFrame *frame, + int *got_frame_ptr, AVPacket *avpkt) +{ + LibLC3DecContext *liblc3 = avctx->priv_data; + int channels = avctx->ch_layout.nb_channels; + uint8_t *in = avpkt->data; + int block_bytes, ret; + + frame->nb_samples = lc3_hr_frame_samples( + liblc3->hr_mode, liblc3->frame_us, liblc3->srate_hz); + if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) + return ret; + + block_bytes = avpkt->size; + for (int ch = 0; ch < channels; ch++) { + int frame_bytes = block_bytes / channels + + (ch < block_bytes % channels); + + + ret = lc3_decode(liblc3->decoder[ch], in, frame_bytes, + LC3_PCM_FORMAT_FLOAT, frame->data[ch], 1); + if (ret < 0) + return AVERROR_INVALIDDATA; + + in += frame_bytes; + } + + frame->nb_samples = FFMIN(frame->nb_samples, avpkt->duration); + + *got_frame_ptr = 1; + + return avpkt->size; +} + +const FFCodec ff_liblc3_lc3_decoder = { + .p.name = "liblc3", + CODEC_LONG_NAME("LC3 (Low Complexity Communication Codec)"), + .p.type = AVMEDIA_TYPE_AUDIO, + .p.id = AV_CODEC_ID_LC3, + .p.capabilities = AV_CODEC_CAP_DR1, + .p.wrapper_name = "liblc3", + .priv_data_size = sizeof(LibLC3DecContext), + .init = liblc3_decode_init, + .close = liblc3_decode_close, + FF_CODEC_DECODE_CB(liblc3_decode), +}; + +const FFCodec ff_liblc3_lc3plus_decoder = { + .p.name = "liblc3", + CODEC_LONG_NAME("LC3plus (Low Complexity Communication Codec plus)"), + .p.type = AVMEDIA_TYPE_AUDIO, + .p.id = AV_CODEC_ID_LC3_PLUS, + .p.capabilities = AV_CODEC_CAP_DR1, + .p.wrapper_name = "liblc3", + .priv_data_size = sizeof(LibLC3DecContext), + .init = liblc3_decode_init, + .close = liblc3_decode_close, + FF_CODEC_DECODE_CB(liblc3_decode), +}; diff --git a/libavcodec/liblc3enc.c b/libavcodec/liblc3enc.c new file mode 100644 index 0000000000..6495742c04 --- /dev/null +++ b/libavcodec/liblc3enc.c @@ -0,0 +1,191 @@ +/* + * LC3 encoder wrapper + * Copyright (C) 2024 Antoine Soulier + * + * This file is part of FFmpeg. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include + +#include "libavutil/intreadwrite.h" +#include "libavutil/opt.h" + +#include "avcodec.h" +#include "codec.h" +#include "codec_internal.h" +#include "encode.h" + +#define ENCODER_MAX_CHANNELS 2 + +typedef struct LibLC3EncOpts { + float frame_duration; + bool hr_mode; +} LibLC3EncOpts; + +typedef struct LibLC3EncContext { + AVClass *av_class; + LibLC3EncOpts opts; + int block_bytes; + lc3_encoder_t encoder[ENCODER_MAX_CHANNELS]; +} LibLC3EncContext; + +static av_cold int liblc3_encode_init(AVCodecContext *avctx) +{ + LibLC3EncContext *liblc3 = avctx->priv_data; + bool hr_mode = liblc3->opts.hr_mode; + int frame_us = liblc3->opts.frame_duration * 1000; + int srate_hz = avctx->sample_rate; + int channels = avctx->ch_layout.nb_channels; + int effective_bit_rate; + unsigned encoder_size; + + if (frame_us != 2500 && frame_us != 5000 && + frame_us != 7500 && frame_us != 10000 ) { + av_log(avctx, AV_LOG_ERROR, + "Unsupported frame duration %.1f ms\n", frame_us / 1e3f); + return AVERROR(EINVAL); + } + + hr_mode |= srate_hz > 48000; + hr_mode &= srate_hz >= 48000; + + if (frame_us <= 5000 || hr_mode) + avctx->codec_id = AV_CODEC_ID_LC3_PLUS; + + if (frame_us == 7500 && hr_mode) { + av_log(avctx, AV_LOG_ERROR, + "High-reolution mode not supported with 7.5 ms frames\n"); + return AVERROR(EINVAL); + } + + av_log(avctx, AV_LOG_INFO, "Encoding %.1f ms frames\n", frame_us / 1e3f); + if (hr_mode) + av_log(avctx, AV_LOG_INFO, "High-resolution mode enabled\n"); + + liblc3->block_bytes = lc3_hr_frame_block_bytes( + hr_mode, frame_us, srate_hz, channels, avctx->bit_rate); + + effective_bit_rate = lc3_hr_resolve_bitrate( + hr_mode, frame_us, srate_hz, liblc3->block_bytes); + + if (avctx->bit_rate != effective_bit_rate) + av_log(avctx, AV_LOG_WARNING, + "Bitrate changed to %d bps\n", effective_bit_rate); + avctx->bit_rate = effective_bit_rate; + + encoder_size = lc3_hr_encoder_size(frame_us, frame_us, srate_hz); + if (!encoder_size) + return AVERROR(EINVAL); + + for (int ch = 0; ch < channels; ch++) { + liblc3->encoder[ch] = lc3_hr_setup_encoder( + hr_mode, frame_us, srate_hz, 0, av_malloc(encoder_size)); + if (!liblc3->encoder[ch]) + return AVERROR(ENOMEM); + } + + avctx->extradata = av_mallocz(6); + if (!avctx->extradata) + return AVERROR(ENOMEM); + + AV_WL16(avctx->extradata + 0, frame_us); + AV_WL16(avctx->extradata + 2, 0); + AV_WL16(avctx->extradata + 4, hr_mode); + avctx->extradata_size = 6; + + avctx->frame_size = lc3_hr_frame_samples(hr_mode, frame_us, srate_hz); + + return 0; +} + +static av_cold int liblc3_encode_close(AVCodecContext *avctx) +{ + LibLC3EncContext *liblc3 = avctx->priv_data; + int channels = avctx->ch_layout.nb_channels; + + for (int ch = 0; ch < channels; ch++) + av_free(liblc3->encoder[ch]); + + return 0; +} + +static int liblc3_encode(AVCodecContext *avctx, AVPacket *avpkt, + const AVFrame *av_frame, int *got_packet_ptr) +{ + LibLC3EncContext *liblc3 = avctx->priv_data; + int block_bytes = liblc3->block_bytes; + int channels = avctx->ch_layout.nb_channels; + uint8_t *data_ptr; + int ret; + + if ((ret = ff_alloc_packet(avctx, avpkt, block_bytes)) < 0) + return ret; + + data_ptr = avpkt->data; + for (int ch = 0; ch < channels; ch++) { + int frame_bytes = block_bytes / channels + + (ch < block_bytes % channels); + + lc3_encode(liblc3->encoder[ch], + LC3_PCM_FORMAT_FLOAT, av_frame->data[ch], 1, + frame_bytes, data_ptr); + + data_ptr += frame_bytes; + } + + *got_packet_ptr = 1; + + return 0; +} + +#define OFFSET(x) offsetof(LibLC3EncContext, opts.x) +#define FLAGS AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM +static const AVOption options[] = { + { "frame_duration", "Duration of a frame in milliseconds", + OFFSET(frame_duration), AV_OPT_TYPE_FLOAT, + { .dbl = 10.0 }, 2.5, 10.0, FLAGS }, + { "high_resolution", "Enable High-Resolution mode (48 KHz or 96 KHz)", + OFFSET(hr_mode), AV_OPT_TYPE_BOOL, + { .i64 = 0 }, 0, 1, FLAGS }, + { NULL } +}; + +static const AVClass class = { + .class_name = "liblc3 encoder", + .item_name = av_default_item_name, + .option = options, + .version = LIBAVUTIL_VERSION_INT, +}; + +const FFCodec ff_liblc3_encoder = { + .p.name = "liblc3", + CODEC_LONG_NAME("LC3 (Low Complexity Communication Codec)"), + .p.type = AVMEDIA_TYPE_AUDIO, + .p.id = AV_CODEC_ID_LC3, + .p.capabilities = AV_CODEC_CAP_DR1, + .p.ch_layouts = (const AVChannelLayout[]) + { { AV_CHANNEL_ORDER_UNSPEC, 1 }, + { AV_CHANNEL_ORDER_UNSPEC, 2 }, { 0 } }, + .p.supported_samplerates = (const int []) + { 96000, 48000, 32000, 24000, 16000, 8000, 0 }, + .p.sample_fmts = (const enum AVSampleFormat[]) + { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE }, + .p.priv_class = &class, + .p.wrapper_name = "liblc3", + .priv_data_size = sizeof(LibLC3EncContext), + .init = liblc3_encode_init, + .close = liblc3_encode_close, + FF_CODEC_ENCODE_CB(liblc3_encode), +};