mirror of https://github.com/FFmpeg/FFmpeg.git
tipok
13 years ago
committed by
Michael Niedermayer
parent
023e9960d7
commit
cbf914cf16
7 changed files with 151 additions and 4 deletions
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/*
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* Interface to libaacplus for aac+ (sbr+ps) encoding |
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* Copyright (c) 2010 tipok <piratfm@gmail.com> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/**
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* @file |
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* Interface to libaacplus for aac+ (sbr+ps) encoding. |
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*/ |
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#include "avcodec.h" |
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#include <aacplus.h> |
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typedef struct aacPlusAudioContext { |
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aacplusEncHandle aacplus_handle; |
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} aacPlusAudioContext; |
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static av_cold int aacPlus_encode_init(AVCodecContext *avctx) |
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{ |
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aacPlusAudioContext *s = avctx->priv_data; |
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aacplusEncConfiguration *aacplus_cfg; |
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unsigned long samples_input, max_bytes_output; |
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/* number of channels */ |
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if (avctx->channels < 1 || avctx->channels > 2) { |
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av_log(avctx, AV_LOG_ERROR, "encoding %d channel(s) is not allowed\n", avctx->channels); |
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return -1; |
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} |
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s->aacplus_handle = aacplusEncOpen(avctx->sample_rate, |
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avctx->channels, |
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&samples_input, &max_bytes_output); |
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if(!s->aacplus_handle) { |
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av_log(avctx, AV_LOG_ERROR, "can't open encoder\n"); |
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return -1; |
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} |
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/* check aacplus version */ |
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aacplus_cfg = aacplusEncGetCurrentConfiguration(s->aacplus_handle); |
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/* put the options in the configuration struct */ |
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if(avctx->profile != FF_PROFILE_AAC_LOW && avctx->profile != FF_PROFILE_UNKNOWN) { |
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av_log(avctx, AV_LOG_ERROR, "invalid AAC profile: %d, only LC supported\n", avctx->profile); |
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aacplusEncClose(s->aacplus_handle); |
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return -1; |
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} |
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aacplus_cfg->bitRate = avctx->bit_rate; |
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aacplus_cfg->bandWidth = avctx->cutoff; |
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if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) { |
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aacplus_cfg->outputFormat = 0; //raw aac
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} |
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aacplus_cfg->inputFormat = AACPLUS_INPUT_16BIT; |
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if (!aacplusEncSetConfiguration(s->aacplus_handle, aacplus_cfg)) { |
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av_log(avctx, AV_LOG_ERROR, "libaacplus doesn't support this output format!\n"); |
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return -1; |
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} |
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avctx->frame_size = samples_input / avctx->channels; |
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avctx->coded_frame= avcodec_alloc_frame(); |
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avctx->coded_frame->key_frame= 1; |
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/* Set decoder specific info */ |
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avctx->extradata_size = 0; |
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if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) { |
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unsigned char *buffer = NULL; |
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unsigned long decoder_specific_info_size; |
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if (aacplusEncGetDecoderSpecificInfo(s->aacplus_handle, &buffer, |
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&decoder_specific_info_size) == 1) { |
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avctx->extradata = av_malloc(decoder_specific_info_size + FF_INPUT_BUFFER_PADDING_SIZE); |
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avctx->extradata_size = decoder_specific_info_size; |
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memcpy(avctx->extradata, buffer, avctx->extradata_size); |
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} |
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#undef free |
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free(buffer); |
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#define free please_use_av_free |
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} |
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return 0; |
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} |
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static int aacPlus_encode_frame(AVCodecContext *avctx, |
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unsigned char *frame, int buf_size, void *data) |
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{ |
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aacPlusAudioContext *s = avctx->priv_data; |
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int bytes_written; |
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bytes_written = aacplusEncEncode(s->aacplus_handle, |
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data, |
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avctx->frame_size * avctx->channels, |
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frame, |
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buf_size); |
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return bytes_written; |
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} |
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static av_cold int aacPlus_encode_close(AVCodecContext *avctx) |
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{ |
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aacPlusAudioContext *s = avctx->priv_data; |
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av_freep(&avctx->coded_frame); |
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av_freep(&avctx->extradata); |
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aacplusEncClose(s->aacplus_handle); |
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return 0; |
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} |
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AVCodec ff_libaacplus_encoder = { |
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"libaacplus", |
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AVMEDIA_TYPE_AUDIO, |
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CODEC_ID_AAC, |
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sizeof(aacPlusAudioContext), |
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aacPlus_encode_init, |
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aacPlus_encode_frame, |
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aacPlus_encode_close, |
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.sample_fmts = (const enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE}, |
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.long_name = NULL_IF_CONFIG_SMALL("libaacplus AAC+ (Advanced Audio Codec with SBR+PS)"), |
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}; |
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