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/*
* AAC encoder wrapper
* Copyright (c) 2010 Martin Storsjo
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <vo-aacenc/voAAC.h>
#include <vo-aacenc/cmnMemory.h>
#include "avcodec.h"
#include "mpeg4audio.h"
typedef struct AACContext {
VO_AUDIO_CODECAPI codec_api;
VO_HANDLE handle;
VO_MEM_OPERATOR mem_operator;
VO_CODEC_INIT_USERDATA user_data;
} AACContext;
static av_cold int aac_encode_init(AVCodecContext *avctx)
{
AACContext *s = avctx->priv_data;
AACENC_PARAM params = { 0 };
int index;
avctx->coded_frame = avcodec_alloc_frame();
avctx->frame_size = 1024;
voGetAACEncAPI(&s->codec_api);
s->mem_operator.Alloc = cmnMemAlloc;
s->mem_operator.Copy = cmnMemCopy;
s->mem_operator.Free = cmnMemFree;
s->mem_operator.Set = cmnMemSet;
s->mem_operator.Check = cmnMemCheck;
s->user_data.memflag = VO_IMF_USERMEMOPERATOR;
s->user_data.memData = &s->mem_operator;
s->codec_api.Init(&s->handle, VO_AUDIO_CodingAAC, &s->user_data);
params.sampleRate = avctx->sample_rate;
params.bitRate = avctx->bit_rate;
params.nChannels = avctx->channels;
params.adtsUsed = !(avctx->flags & CODEC_FLAG_GLOBAL_HEADER);
if (s->codec_api.SetParam(s->handle, VO_PID_AAC_ENCPARAM, ¶ms)
!= VO_ERR_NONE) {
av_log(avctx, AV_LOG_ERROR, "Unable to set encoding parameters\n");
return AVERROR(EINVAL);
}
for (index = 0; index < 16; index++)
if (avctx->sample_rate == ff_mpeg4audio_sample_rates[index])
break;
if (index == 16) {
av_log(avctx, AV_LOG_ERROR, "Unsupported sample rate %d\n",
avctx->sample_rate);
return AVERROR(ENOSYS);
}
if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) {
avctx->extradata_size = 2;
avctx->extradata = av_mallocz(avctx->extradata_size +
FF_INPUT_BUFFER_PADDING_SIZE);
if (!avctx->extradata)
return AVERROR(ENOMEM);
avctx->extradata[0] = 0x02 << 3 | index >> 1;
avctx->extradata[1] = (index & 0x01) << 7 | avctx->channels << 3;
}
return 0;
}
static int aac_encode_close(AVCodecContext *avctx)
{
AACContext *s = avctx->priv_data;
s->codec_api.Uninit(s->handle);
av_freep(&avctx->coded_frame);
return 0;
}
static int aac_encode_frame(AVCodecContext *avctx,
unsigned char *frame/*out*/,
int buf_size, void *data/*in*/)
{
AACContext *s = avctx->priv_data;
VO_CODECBUFFER input = { 0 }, output = { 0 };
VO_AUDIO_OUTPUTINFO output_info = { { 0 } };
input.Buffer = data;
input.Length = 2 * avctx->channels * avctx->frame_size;
output.Buffer = frame;
output.Length = buf_size;
s->codec_api.SetInputData(s->handle, &input);
if (s->codec_api.GetOutputData(s->handle, &output, &output_info)
!= VO_ERR_NONE) {
av_log(avctx, AV_LOG_ERROR, "Unable to encode frame\n");
return AVERROR(EINVAL);
}
return output.Length;
}
AVCodec libvo_aacenc_encoder = {
"libvo_aacenc",
CODEC_TYPE_AUDIO,
CODEC_ID_AAC,
sizeof(AACContext),
aac_encode_init,
aac_encode_frame,
aac_encode_close,
NULL,
.sample_fmts = (const enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("Android VisualOn AAC"),
};
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