480 lines
18 KiB
C
Executable File
480 lines
18 KiB
C
Executable File
/*
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* AAC encoder wrapper
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* Copyright (c) 2012 Martin Storsjo
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*
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* This file is part of FFmpeg.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <fdk-aac/aacenc_lib.h>
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#include "libavutil/channel_layout.h"
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#include "libavutil/common.h"
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#include "libavutil/opt.h"
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#include "avcodec.h"
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#include "audio_frame_queue.h"
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#include "internal.h"
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#include "profiles.h"
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#ifdef AACENCODER_LIB_VL0
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#define FDKENC_VER_AT_LEAST(vl0, vl1) \
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((AACENCODER_LIB_VL0 > vl0) || \
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(AACENCODER_LIB_VL0 == vl0 && AACENCODER_LIB_VL1 >= vl1))
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#else
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#define FDKENC_VER_AT_LEAST(vl0, vl1) 0
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#endif
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typedef struct AACContext {
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const AVClass *class;
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HANDLE_AACENCODER handle;
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int afterburner;
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int eld_sbr;
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int eld_v2;
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int signaling;
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int latm;
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int header_period;
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int vbr;
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AudioFrameQueue afq;
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} AACContext;
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static const AVOption aac_enc_options[] = {
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{ "afterburner", "Afterburner (improved quality)", offsetof(AACContext, afterburner), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
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{ "eld_sbr", "Enable SBR for ELD (for SBR in other configurations, use the -profile parameter)", offsetof(AACContext, eld_sbr), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
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#if FDKENC_VER_AT_LEAST(4, 0) // 4.0.0
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{ "eld_v2", "Enable ELDv2 (LD-MPS extension for ELD stereo signals)", offsetof(AACContext, eld_v2), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
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#endif
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{ "signaling", "SBR/PS signaling style", offsetof(AACContext, signaling), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 2, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM, "signaling" },
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{ "default", "Choose signaling implicitly (explicit hierarchical by default, implicit if global header is disabled)", 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, 0, 0, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM, "signaling" },
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{ "implicit", "Implicit backwards compatible signaling", 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, 0, 0, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM, "signaling" },
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{ "explicit_sbr", "Explicit SBR, implicit PS signaling", 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, 0, 0, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM, "signaling" },
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{ "explicit_hierarchical", "Explicit hierarchical signaling", 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, 0, 0, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM, "signaling" },
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{ "latm", "Output LATM/LOAS encapsulated data", offsetof(AACContext, latm), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
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{ "header_period", "StreamMuxConfig and PCE repetition period (in frames)", offsetof(AACContext, header_period), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 0xffff, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
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{ "vbr", "VBR mode (1-5)", offsetof(AACContext, vbr), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 5, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
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FF_AAC_PROFILE_OPTS
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{ NULL }
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};
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static const AVClass aac_enc_class = {
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.class_name = "libfdk_aac",
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.item_name = av_default_item_name,
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.option = aac_enc_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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static const char *aac_get_error(AACENC_ERROR err)
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{
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switch (err) {
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case AACENC_OK:
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return "No error";
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case AACENC_INVALID_HANDLE:
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return "Invalid handle";
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case AACENC_MEMORY_ERROR:
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return "Memory allocation error";
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case AACENC_UNSUPPORTED_PARAMETER:
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return "Unsupported parameter";
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case AACENC_INVALID_CONFIG:
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return "Invalid config";
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case AACENC_INIT_ERROR:
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return "Initialization error";
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case AACENC_INIT_AAC_ERROR:
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return "AAC library initialization error";
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case AACENC_INIT_SBR_ERROR:
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return "SBR library initialization error";
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case AACENC_INIT_TP_ERROR:
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return "Transport library initialization error";
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case AACENC_INIT_META_ERROR:
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return "Metadata library initialization error";
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case AACENC_ENCODE_ERROR:
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return "Encoding error";
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case AACENC_ENCODE_EOF:
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return "End of file";
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default:
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return "Unknown error";
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}
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}
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static int aac_encode_close(AVCodecContext *avctx)
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{
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AACContext *s = avctx->priv_data;
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if (s->handle)
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aacEncClose(&s->handle);
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av_freep(&avctx->extradata);
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ff_af_queue_close(&s->afq);
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return 0;
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}
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static av_cold int aac_encode_init(AVCodecContext *avctx)
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{
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AACContext *s = avctx->priv_data;
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int ret = AVERROR(EINVAL);
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AACENC_InfoStruct info = { 0 };
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CHANNEL_MODE mode;
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AACENC_ERROR err;
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int aot = FF_PROFILE_AAC_LOW + 1;
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int sce = 0, cpe = 0;
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if ((err = aacEncOpen(&s->handle, 0, avctx->channels)) != AACENC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to open the encoder: %s\n",
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aac_get_error(err));
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goto error;
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}
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if (avctx->profile != FF_PROFILE_UNKNOWN)
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aot = avctx->profile + 1;
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if ((err = aacEncoder_SetParam(s->handle, AACENC_AOT, aot)) != AACENC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to set the AOT %d: %s\n",
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aot, aac_get_error(err));
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goto error;
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}
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if (aot == FF_PROFILE_AAC_ELD + 1 && s->eld_sbr) {
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if ((err = aacEncoder_SetParam(s->handle, AACENC_SBR_MODE,
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1)) != AACENC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to enable SBR for ELD: %s\n",
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aac_get_error(err));
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goto error;
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}
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}
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if ((err = aacEncoder_SetParam(s->handle, AACENC_SAMPLERATE,
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avctx->sample_rate)) != AACENC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to set the sample rate %d: %s\n",
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avctx->sample_rate, aac_get_error(err));
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goto error;
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}
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switch (avctx->channels) {
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case 1: mode = MODE_1; sce = 1; cpe = 0; break;
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case 2:
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#if FDKENC_VER_AT_LEAST(4, 0) // 4.0.0
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// (profile + 1) to map from profile range to AOT range
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if (aot == FF_PROFILE_AAC_ELD + 1 && s->eld_v2) {
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if ((err = aacEncoder_SetParam(s->handle, AACENC_CHANNELMODE,
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128)) != AACENC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to enable ELDv2: %s\n",
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aac_get_error(err));
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goto error;
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} else {
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mode = MODE_212;
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sce = 1;
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cpe = 0;
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}
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} else
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#endif
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{
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mode = MODE_2;
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sce = 0;
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cpe = 1;
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}
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break;
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case 3: mode = MODE_1_2; sce = 1; cpe = 1; break;
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case 4: mode = MODE_1_2_1; sce = 2; cpe = 1; break;
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case 5: mode = MODE_1_2_2; sce = 1; cpe = 2; break;
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case 6: mode = MODE_1_2_2_1; sce = 2; cpe = 2; break;
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/* The version macro is introduced the same time as the 7.1 support, so this
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should suffice. */
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#if FDKENC_VER_AT_LEAST(3, 4) // 3.4.12
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case 8:
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sce = 2;
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cpe = 3;
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if (avctx->channel_layout == AV_CH_LAYOUT_7POINT1) {
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mode = MODE_7_1_REAR_SURROUND;
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} else {
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// MODE_1_2_2_2_1 and MODE_7_1_FRONT_CENTER use the same channel layout
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mode = MODE_7_1_FRONT_CENTER;
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}
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break;
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#endif
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default:
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av_log(avctx, AV_LOG_ERROR,
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"Unsupported number of channels %d\n", avctx->channels);
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goto error;
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}
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if ((err = aacEncoder_SetParam(s->handle, AACENC_CHANNELMODE,
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mode)) != AACENC_OK) {
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av_log(avctx, AV_LOG_ERROR,
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"Unable to set channel mode %d: %s\n", mode, aac_get_error(err));
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goto error;
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}
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if ((err = aacEncoder_SetParam(s->handle, AACENC_CHANNELORDER,
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1)) != AACENC_OK) {
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av_log(avctx, AV_LOG_ERROR,
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"Unable to set wav channel order %d: %s\n",
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mode, aac_get_error(err));
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goto error;
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}
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if (avctx->flags & AV_CODEC_FLAG_QSCALE || s->vbr) {
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int mode = s->vbr ? s->vbr : avctx->global_quality;
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if (mode < 1 || mode > 5) {
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av_log(avctx, AV_LOG_WARNING,
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"VBR quality %d out of range, should be 1-5\n", mode);
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mode = av_clip(mode, 1, 5);
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}
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av_log(avctx, AV_LOG_WARNING,
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"Note, the VBR setting is unsupported and only works with "
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"some parameter combinations\n");
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if ((err = aacEncoder_SetParam(s->handle, AACENC_BITRATEMODE,
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mode)) != AACENC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to set the VBR bitrate mode %d: %s\n",
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mode, aac_get_error(err));
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goto error;
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}
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} else {
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if (avctx->bit_rate <= 0) {
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if (avctx->profile == FF_PROFILE_AAC_HE_V2) {
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sce = 1;
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cpe = 0;
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}
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avctx->bit_rate = (96*sce + 128*cpe) * avctx->sample_rate / 44;
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if (avctx->profile == FF_PROFILE_AAC_HE ||
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avctx->profile == FF_PROFILE_AAC_HE_V2 ||
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avctx->profile == FF_PROFILE_MPEG2_AAC_HE ||
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s->eld_sbr)
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avctx->bit_rate /= 2;
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}
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if ((err = aacEncoder_SetParam(s->handle, AACENC_BITRATE,
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avctx->bit_rate)) != AACENC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to set the bitrate %"PRId64": %s\n",
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avctx->bit_rate, aac_get_error(err));
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goto error;
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}
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}
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/* Choose bitstream format - if global header is requested, use
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* raw access units, otherwise use ADTS. */
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if ((err = aacEncoder_SetParam(s->handle, AACENC_TRANSMUX,
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avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER ? TT_MP4_RAW :
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s->latm ? TT_MP4_LOAS : TT_MP4_ADTS)) != AACENC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to set the transmux format: %s\n",
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aac_get_error(err));
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goto error;
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}
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if (s->latm && s->header_period) {
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if ((err = aacEncoder_SetParam(s->handle, AACENC_HEADER_PERIOD,
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s->header_period)) != AACENC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to set header period: %s\n",
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aac_get_error(err));
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goto error;
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}
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}
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/* If no signaling mode is chosen, use explicit hierarchical signaling
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* if using mp4 mode (raw access units, with global header) and
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* implicit signaling if using ADTS. */
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if (s->signaling < 0)
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s->signaling = avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER ? 2 : 0;
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if ((err = aacEncoder_SetParam(s->handle, AACENC_SIGNALING_MODE,
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s->signaling)) != AACENC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to set signaling mode %d: %s\n",
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s->signaling, aac_get_error(err));
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goto error;
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}
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if ((err = aacEncoder_SetParam(s->handle, AACENC_AFTERBURNER,
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s->afterburner)) != AACENC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to set afterburner to %d: %s\n",
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s->afterburner, aac_get_error(err));
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goto error;
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}
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if (avctx->cutoff > 0) {
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if (avctx->cutoff < (avctx->sample_rate + 255) >> 8 || avctx->cutoff > 20000) {
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av_log(avctx, AV_LOG_ERROR, "cutoff valid range is %d-20000\n",
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(avctx->sample_rate + 255) >> 8);
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goto error;
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}
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if ((err = aacEncoder_SetParam(s->handle, AACENC_BANDWIDTH,
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avctx->cutoff)) != AACENC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to set the encoder bandwidth to %d: %s\n",
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avctx->cutoff, aac_get_error(err));
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goto error;
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}
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}
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if ((err = aacEncEncode(s->handle, NULL, NULL, NULL, NULL)) != AACENC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to initialize the encoder: %s\n",
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aac_get_error(err));
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return AVERROR(EINVAL);
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}
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if ((err = aacEncInfo(s->handle, &info)) != AACENC_OK) {
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av_log(avctx, AV_LOG_ERROR, "Unable to get encoder info: %s\n",
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aac_get_error(err));
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goto error;
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}
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avctx->frame_size = info.frameLength;
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#if FDKENC_VER_AT_LEAST(4, 0) // 4.0.0
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avctx->initial_padding = info.nDelay;
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#else
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avctx->initial_padding = info.encoderDelay;
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#endif
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ff_af_queue_init(avctx, &s->afq);
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if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
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avctx->extradata_size = info.confSize;
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avctx->extradata = av_mallocz(avctx->extradata_size +
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AV_INPUT_BUFFER_PADDING_SIZE);
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if (!avctx->extradata) {
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ret = AVERROR(ENOMEM);
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goto error;
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}
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memcpy(avctx->extradata, info.confBuf, info.confSize);
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}
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return 0;
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error:
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aac_encode_close(avctx);
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return ret;
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}
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static int aac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
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const AVFrame *frame, int *got_packet_ptr)
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{
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AACContext *s = avctx->priv_data;
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AACENC_BufDesc in_buf = { 0 }, out_buf = { 0 };
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AACENC_InArgs in_args = { 0 };
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AACENC_OutArgs out_args = { 0 };
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int in_buffer_identifier = IN_AUDIO_DATA;
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int in_buffer_size, in_buffer_element_size;
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int out_buffer_identifier = OUT_BITSTREAM_DATA;
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int out_buffer_size, out_buffer_element_size;
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void *in_ptr, *out_ptr;
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int ret;
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uint8_t dummy_buf[1];
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AACENC_ERROR err;
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/* handle end-of-stream small frame and flushing */
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if (!frame) {
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/* Must be a non-null pointer, even if it's a dummy. We could use
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* the address of anything else on the stack as well. */
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in_ptr = dummy_buf;
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in_buffer_size = 0;
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in_args.numInSamples = -1;
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} else {
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in_ptr = frame->data[0];
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in_buffer_size = 2 * avctx->channels * frame->nb_samples;
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in_args.numInSamples = avctx->channels * frame->nb_samples;
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/* add current frame to the queue */
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if ((ret = ff_af_queue_add(&s->afq, frame)) < 0)
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return ret;
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}
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in_buffer_element_size = 2;
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in_buf.numBufs = 1;
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in_buf.bufs = &in_ptr;
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in_buf.bufferIdentifiers = &in_buffer_identifier;
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in_buf.bufSizes = &in_buffer_size;
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in_buf.bufElSizes = &in_buffer_element_size;
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/* The maximum packet size is 6144 bits aka 768 bytes per channel. */
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if ((ret = ff_alloc_packet2(avctx, avpkt, FFMAX(8192, 768 * avctx->channels), 0)) < 0)
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return ret;
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out_ptr = avpkt->data;
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out_buffer_size = avpkt->size;
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out_buffer_element_size = 1;
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out_buf.numBufs = 1;
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out_buf.bufs = &out_ptr;
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out_buf.bufferIdentifiers = &out_buffer_identifier;
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out_buf.bufSizes = &out_buffer_size;
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out_buf.bufElSizes = &out_buffer_element_size;
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if ((err = aacEncEncode(s->handle, &in_buf, &out_buf, &in_args,
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&out_args)) != AACENC_OK) {
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if (!frame && err == AACENC_ENCODE_EOF)
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return 0;
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av_log(avctx, AV_LOG_ERROR, "Unable to encode frame: %s\n",
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aac_get_error(err));
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return AVERROR(EINVAL);
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}
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if (!out_args.numOutBytes)
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return 0;
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/* Get the next frame pts & duration */
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ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts,
|
|
&avpkt->duration);
|
|
|
|
avpkt->size = out_args.numOutBytes;
|
|
*got_packet_ptr = 1;
|
|
return 0;
|
|
}
|
|
|
|
static const AVProfile profiles[] = {
|
|
{ FF_PROFILE_AAC_LOW, "LC" },
|
|
{ FF_PROFILE_AAC_HE, "HE-AAC" },
|
|
{ FF_PROFILE_AAC_HE_V2, "HE-AACv2" },
|
|
{ FF_PROFILE_AAC_LD, "LD" },
|
|
{ FF_PROFILE_AAC_ELD, "ELD" },
|
|
{ FF_PROFILE_UNKNOWN },
|
|
};
|
|
|
|
static const AVCodecDefault aac_encode_defaults[] = {
|
|
{ "b", "0" },
|
|
{ NULL }
|
|
};
|
|
|
|
static const uint64_t aac_channel_layout[] = {
|
|
AV_CH_LAYOUT_MONO,
|
|
AV_CH_LAYOUT_STEREO,
|
|
AV_CH_LAYOUT_SURROUND,
|
|
AV_CH_LAYOUT_4POINT0,
|
|
AV_CH_LAYOUT_5POINT0_BACK,
|
|
AV_CH_LAYOUT_5POINT1_BACK,
|
|
#if FDKENC_VER_AT_LEAST(3, 4) // 3.4.12
|
|
AV_CH_LAYOUT_7POINT1_WIDE_BACK,
|
|
AV_CH_LAYOUT_7POINT1,
|
|
#endif
|
|
0,
|
|
};
|
|
|
|
static const int aac_sample_rates[] = {
|
|
96000, 88200, 64000, 48000, 44100, 32000,
|
|
24000, 22050, 16000, 12000, 11025, 8000, 0
|
|
};
|
|
|
|
AVCodec ff_libfdk_aac_encoder = {
|
|
.name = "libfdk_aac",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Fraunhofer FDK AAC"),
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.id = AV_CODEC_ID_AAC,
|
|
.priv_data_size = sizeof(AACContext),
|
|
.init = aac_encode_init,
|
|
.encode2 = aac_encode_frame,
|
|
.close = aac_encode_close,
|
|
.capabilities = AV_CODEC_CAP_SMALL_LAST_FRAME | AV_CODEC_CAP_DELAY,
|
|
.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
|
|
AV_SAMPLE_FMT_NONE },
|
|
.priv_class = &aac_enc_class,
|
|
.defaults = aac_encode_defaults,
|
|
.profiles = profiles,
|
|
.supported_samplerates = aac_sample_rates,
|
|
.channel_layouts = aac_channel_layout,
|
|
.wrapper_name = "libfdk",
|
|
};
|