mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
c57c770db3
with changes by me
int->float as video uses float too
remove silent cliping to some per codec range, this should result in an error instead
remove change to utils.c as its inconsistant with video
Originally committed as revision 4533 to svn://svn.ffmpeg.org/ffmpeg/trunk
130 lines
3.9 KiB
C
130 lines
3.9 KiB
C
/*
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* Interface to libfaac for aac encoding
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* Copyright (c) 2002 Gildas Bazin <gbazin@netcourrier.com>
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*
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* This library 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 of the License, or (at your option) any later version.
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*
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* This library 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 this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/**
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* @file faacaudio.c
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* Interface to libfaac for aac encoding.
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*/
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#include "avcodec.h"
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#include <faac.h>
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typedef struct FaacAudioContext {
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faacEncHandle faac_handle;
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} FaacAudioContext;
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static int Faac_encode_init(AVCodecContext *avctx)
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{
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FaacAudioContext *s = avctx->priv_data;
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faacEncConfigurationPtr faac_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 > 6)
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return -1;
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s->faac_handle = faacEncOpen(avctx->sample_rate,
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avctx->channels,
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&samples_input, &max_bytes_output);
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/* check faac version */
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faac_cfg = faacEncGetCurrentConfiguration(s->faac_handle);
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if (faac_cfg->version != FAAC_CFG_VERSION) {
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av_log(avctx, AV_LOG_ERROR, "wrong libfaac version (compiled for: %d, using %d)\n", FAAC_CFG_VERSION, faac_cfg->version);
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faacEncClose(s->faac_handle);
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return -1;
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}
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/* put the options in the configuration struct */
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faac_cfg->aacObjectType = LOW;
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faac_cfg->mpegVersion = MPEG4;
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faac_cfg->useTns = 0;
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faac_cfg->allowMidside = 1;
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faac_cfg->bitRate = avctx->bit_rate / avctx->channels;
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if(avctx->flags & CODEC_FLAG_QSCALE) {
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faac_cfg->bitRate = 0;
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faac_cfg->quantqual = avctx->global_quality / FF_QP2LAMBDA;
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}
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faac_cfg->outputFormat = 0;
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faac_cfg->inputFormat = FAAC_INPUT_16BIT;
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if (!faacEncSetConfiguration(s->faac_handle, faac_cfg)) {
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av_log(avctx, AV_LOG_ERROR, "libfaac 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;
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unsigned long decoder_specific_info_size;
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if (!faacEncGetDecoderSpecificInfo(s->faac_handle, &buffer,
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&decoder_specific_info_size)) {
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avctx->extradata = buffer;
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avctx->extradata_size = decoder_specific_info_size;
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}
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}
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return 0;
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}
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int Faac_encode_frame(AVCodecContext *avctx,
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unsigned char *frame, int buf_size, void *data)
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{
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FaacAudioContext *s = avctx->priv_data;
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int bytes_written;
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bytes_written = faacEncEncode(s->faac_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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int Faac_encode_close(AVCodecContext *avctx)
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{
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FaacAudioContext *s = avctx->priv_data;
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av_freep(&avctx->coded_frame);
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//if (avctx->extradata_size) free(avctx->extradata);
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faacEncClose(s->faac_handle);
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return 0;
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}
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AVCodec faac_encoder = {
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"aac",
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CODEC_TYPE_AUDIO,
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CODEC_ID_AAC,
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sizeof(FaacAudioContext),
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Faac_encode_init,
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Faac_encode_frame,
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Faac_encode_close
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};
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