1/* 2 * AAC encoder wrapper 3 * Copyright (c) 2010 Martin Storsjo 4 * 5 * This file is part of Libav. 6 * 7 * Libav is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * Libav is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with Libav; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22#include <vo-aacenc/voAAC.h> 23#include <vo-aacenc/cmnMemory.h> 24 25#include "avcodec.h" 26#include "mpeg4audio.h" 27 28typedef struct AACContext { 29 VO_AUDIO_CODECAPI codec_api; 30 VO_HANDLE handle; 31 VO_MEM_OPERATOR mem_operator; 32 VO_CODEC_INIT_USERDATA user_data; 33} AACContext; 34 35static av_cold int aac_encode_init(AVCodecContext *avctx) 36{ 37 AACContext *s = avctx->priv_data; 38 AACENC_PARAM params = { 0 }; 39 int index; 40 41 avctx->coded_frame = avcodec_alloc_frame(); 42 avctx->frame_size = 1024; 43 44 voGetAACEncAPI(&s->codec_api); 45 46 s->mem_operator.Alloc = cmnMemAlloc; 47 s->mem_operator.Copy = cmnMemCopy; 48 s->mem_operator.Free = cmnMemFree; 49 s->mem_operator.Set = cmnMemSet; 50 s->mem_operator.Check = cmnMemCheck; 51 s->user_data.memflag = VO_IMF_USERMEMOPERATOR; 52 s->user_data.memData = &s->mem_operator; 53 s->codec_api.Init(&s->handle, VO_AUDIO_CodingAAC, &s->user_data); 54 55 params.sampleRate = avctx->sample_rate; 56 params.bitRate = avctx->bit_rate; 57 params.nChannels = avctx->channels; 58 params.adtsUsed = !(avctx->flags & CODEC_FLAG_GLOBAL_HEADER); 59 if (s->codec_api.SetParam(s->handle, VO_PID_AAC_ENCPARAM, ¶ms) 60 != VO_ERR_NONE) { 61 av_log(avctx, AV_LOG_ERROR, "Unable to set encoding parameters\n"); 62 return AVERROR(EINVAL); 63 } 64 65 for (index = 0; index < 16; index++) 66 if (avctx->sample_rate == avpriv_mpeg4audio_sample_rates[index]) 67 break; 68 if (index == 16) { 69 av_log(avctx, AV_LOG_ERROR, "Unsupported sample rate %d\n", 70 avctx->sample_rate); 71 return AVERROR(ENOSYS); 72 } 73 if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) { 74 avctx->extradata_size = 2; 75 avctx->extradata = av_mallocz(avctx->extradata_size + 76 FF_INPUT_BUFFER_PADDING_SIZE); 77 if (!avctx->extradata) 78 return AVERROR(ENOMEM); 79 80 avctx->extradata[0] = 0x02 << 3 | index >> 1; 81 avctx->extradata[1] = (index & 0x01) << 7 | avctx->channels << 3; 82 } 83 return 0; 84} 85 86static int aac_encode_close(AVCodecContext *avctx) 87{ 88 AACContext *s = avctx->priv_data; 89 90 s->codec_api.Uninit(s->handle); 91 av_freep(&avctx->coded_frame); 92 93 return 0; 94} 95 96static int aac_encode_frame(AVCodecContext *avctx, 97 unsigned char *frame/*out*/, 98 int buf_size, void *data/*in*/) 99{ 100 AACContext *s = avctx->priv_data; 101 VO_CODECBUFFER input = { 0 }, output = { 0 }; 102 VO_AUDIO_OUTPUTINFO output_info = { { 0 } }; 103 104 input.Buffer = data; 105 input.Length = 2 * avctx->channels * avctx->frame_size; 106 output.Buffer = frame; 107 output.Length = buf_size; 108 109 s->codec_api.SetInputData(s->handle, &input); 110 if (s->codec_api.GetOutputData(s->handle, &output, &output_info) 111 != VO_ERR_NONE) { 112 av_log(avctx, AV_LOG_ERROR, "Unable to encode frame\n"); 113 return AVERROR(EINVAL); 114 } 115 return output.Length; 116} 117 118AVCodec ff_libvo_aacenc_encoder = { 119 .name = "libvo_aacenc", 120 .type = AVMEDIA_TYPE_AUDIO, 121 .id = CODEC_ID_AAC, 122 .priv_data_size = sizeof(AACContext), 123 .init = aac_encode_init, 124 .encode = aac_encode_frame, 125 .close = aac_encode_close, 126 .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE}, 127 .long_name = NULL_IF_CONFIG_SMALL("Android VisualOn AAC"), 128}; 129 130