mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
129 lines
4.2 KiB
C
129 lines
4.2 KiB
C
/*
|
|
* 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 == avpriv_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 ff_libvo_aacenc_encoder = {
|
|
.name = "libvo_aacenc",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.id = CODEC_ID_AAC,
|
|
.priv_data_size = sizeof(AACContext),
|
|
.init = aac_encode_init,
|
|
.encode = aac_encode_frame,
|
|
.close = aac_encode_close,
|
|
.sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
|
|
.long_name = NULL_IF_CONFIG_SMALL("Android VisualOn AAC"),
|
|
};
|