From d89e738a0c63b30a60ca1688158d54b204824161 Mon Sep 17 00:00:00 2001 From: Martin Storsjö Date: Sun, 19 Dec 2010 21:40:23 +0200 Subject: Add an AAC encoder by using the libvo-aacenc library MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Martin Storsjö --- libavcodec/libvo-aacenc.c | 128 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 128 insertions(+) create mode 100644 libavcodec/libvo-aacenc.c (limited to 'libavcodec/libvo-aacenc.c') diff --git a/libavcodec/libvo-aacenc.c b/libavcodec/libvo-aacenc.c new file mode 100644 index 0000000000..65c2745695 --- /dev/null +++ b/libavcodec/libvo-aacenc.c @@ -0,0 +1,128 @@ +/* + * 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 +#include + +#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_UNKNOWN; + } + + avctx->extradata_size = 2; + avctx->extradata = av_mallocz(avctx->extradata_size + + FF_INPUT_BUFFER_PADDING_SIZE); + if (!avctx->extradata) + return AVERROR(ENOMEM); + + 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_NOTSUPP; + } + 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_UNKNOWN; + } + return output.Length; +} + +AVCodec ff_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 = (enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE}, + .long_name = NULL_IF_CONFIG_SMALL("libvo-aacenc AAC"), +}; + -- cgit v1.2.3