| /* |
| * Interface to libaacplus for aac+ (sbr+ps) encoding |
| * Copyright (c) 2010 tipok <piratfm@gmail.com> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg 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 |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * Interface to libaacplus for aac+ (sbr+ps) encoding. |
| */ |
| |
| #include <aacplus.h> |
| |
| #include "avcodec.h" |
| #include "internal.h" |
| |
| typedef struct aacPlusAudioContext { |
| aacplusEncHandle aacplus_handle; |
| unsigned long max_output_bytes; |
| unsigned long samples_input; |
| } aacPlusAudioContext; |
| |
| static av_cold int aacPlus_encode_init(AVCodecContext *avctx) |
| { |
| aacPlusAudioContext *s = avctx->priv_data; |
| aacplusEncConfiguration *aacplus_cfg; |
| |
| /* number of channels */ |
| if (avctx->channels < 1 || avctx->channels > 2) { |
| av_log(avctx, AV_LOG_ERROR, "encoding %d channel(s) is not allowed\n", avctx->channels); |
| return AVERROR(EINVAL); |
| } |
| |
| if (avctx->profile != FF_PROFILE_AAC_LOW && avctx->profile != FF_PROFILE_UNKNOWN) { |
| av_log(avctx, AV_LOG_ERROR, "invalid AAC profile: %d, only LC supported\n", avctx->profile); |
| return AVERROR(EINVAL); |
| } |
| |
| s->aacplus_handle = aacplusEncOpen(avctx->sample_rate, avctx->channels, |
| &s->samples_input, &s->max_output_bytes); |
| if (!s->aacplus_handle) { |
| av_log(avctx, AV_LOG_ERROR, "can't open encoder\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| /* check aacplus version */ |
| aacplus_cfg = aacplusEncGetCurrentConfiguration(s->aacplus_handle); |
| |
| aacplus_cfg->bitRate = avctx->bit_rate; |
| aacplus_cfg->bandWidth = avctx->cutoff; |
| aacplus_cfg->outputFormat = !(avctx->flags & CODEC_FLAG_GLOBAL_HEADER); |
| aacplus_cfg->inputFormat = avctx->sample_fmt == AV_SAMPLE_FMT_FLT ? AACPLUS_INPUT_FLOAT : AACPLUS_INPUT_16BIT; |
| if (!aacplusEncSetConfiguration(s->aacplus_handle, aacplus_cfg)) { |
| av_log(avctx, AV_LOG_ERROR, "libaacplus doesn't support this output format!\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| avctx->frame_size = s->samples_input / avctx->channels; |
| |
| /* Set decoder specific info */ |
| avctx->extradata_size = 0; |
| if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) { |
| |
| unsigned char *buffer = NULL; |
| unsigned long decoder_specific_info_size; |
| |
| if (aacplusEncGetDecoderSpecificInfo(s->aacplus_handle, &buffer, |
| &decoder_specific_info_size) == 1) { |
| avctx->extradata = av_malloc(decoder_specific_info_size + FF_INPUT_BUFFER_PADDING_SIZE); |
| if (!avctx->extradata) { |
| free(buffer); |
| return AVERROR(ENOMEM); |
| } |
| avctx->extradata_size = decoder_specific_info_size; |
| memcpy(avctx->extradata, buffer, avctx->extradata_size); |
| } |
| free(buffer); |
| } |
| return 0; |
| } |
| |
| static int aacPlus_encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
| const AVFrame *frame, int *got_packet) |
| { |
| aacPlusAudioContext *s = avctx->priv_data; |
| int32_t *input_buffer = (int32_t *)frame->data[0]; |
| int ret; |
| |
| if ((ret = ff_alloc_packet2(avctx, pkt, s->max_output_bytes)) < 0) |
| return ret; |
| |
| pkt->size = aacplusEncEncode(s->aacplus_handle, input_buffer, |
| s->samples_input, pkt->data, pkt->size); |
| *got_packet = 1; |
| pkt->pts = frame->pts; |
| return 0; |
| } |
| |
| static av_cold int aacPlus_encode_close(AVCodecContext *avctx) |
| { |
| aacPlusAudioContext *s = avctx->priv_data; |
| |
| av_freep(&avctx->extradata); |
| aacplusEncClose(s->aacplus_handle); |
| |
| return 0; |
| } |
| |
| static const AVProfile profiles[] = { |
| { FF_PROFILE_AAC_LOW, "LC" }, |
| { FF_PROFILE_UNKNOWN }, |
| }; |
| |
| AVCodec ff_libaacplus_encoder = { |
| .name = "libaacplus", |
| .long_name = NULL_IF_CONFIG_SMALL("libaacplus AAC+ (Advanced Audio Codec with SBR+PS)"), |
| .type = AVMEDIA_TYPE_AUDIO, |
| .id = AV_CODEC_ID_AAC, |
| .priv_data_size = sizeof(aacPlusAudioContext), |
| .init = aacPlus_encode_init, |
| .encode2 = aacPlus_encode_frame, |
| .close = aacPlus_encode_close, |
| .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16, |
| AV_SAMPLE_FMT_FLT, |
| AV_SAMPLE_FMT_NONE }, |
| .profiles = profiles, |
| .channel_layouts = (const uint64_t[]) { AV_CH_LAYOUT_MONO, |
| AV_CH_LAYOUT_STEREO, |
| 0 }, |
| }; |