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author | Michael Niedermayer <michaelni@gmx.at> | 2003-10-04 09:53:34 +0000 |
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committer | Michael Niedermayer <michaelni@gmx.at> | 2003-10-04 09:53:34 +0000 |
commit | 29d48296a756818e8d77d2e97c1f3ab0704e003d (patch) | |
tree | 9283e02a48f6f8c0516710fa8fd879bae75f6f61 /libavcodec/faac.c | |
parent | 39518b493f4780f1cd5d8e45aed728049a74d556 (diff) | |
download | ffmpeg-streaming-29d48296a756818e8d77d2e97c1f3ab0704e003d.zip ffmpeg-streaming-29d48296a756818e8d77d2e97c1f3ab0704e003d.tar.gz |
Patch for AAC encoding with libfaac by (Gildas Bazin <gbazin at altern dot org>)
Originally committed as revision 2342 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/faac.c')
-rw-r--r-- | libavcodec/faac.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/libavcodec/faac.c b/libavcodec/faac.c new file mode 100644 index 0000000..9720166 --- /dev/null +++ b/libavcodec/faac.c @@ -0,0 +1,126 @@ +/* + * Interface to libfaac for aac encoding + * Copyright (c) 2002 Gildas Bazin <gbazin@netcourrier.com> + * + * This library 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 of the License, or (at your option) any later version. + * + * This library 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 this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/** + * @file faacaudio.c + * Interface to libfaac for aac encoding. + */ + +#include "avcodec.h" +#include <faac.h> + +typedef struct FaacAudioContext { + faacEncHandle faac_handle; +} FaacAudioContext; + +static int Faac_encode_init(AVCodecContext *avctx) +{ + FaacAudioContext *s = avctx->priv_data; + faacEncConfigurationPtr faac_cfg; + unsigned long samples_input, max_bytes_output; + + /* number of channels */ + if (avctx->channels < 1 || avctx->channels > 6) + return -1; + + s->faac_handle = faacEncOpen(avctx->sample_rate, + avctx->channels, + &samples_input, &max_bytes_output); + + /* check faac version */ + faac_cfg = faacEncGetCurrentConfiguration(s->faac_handle); + if (faac_cfg->version != FAAC_CFG_VERSION) { + fprintf(stderr, "wrong libfaac version (compiled for: %d, using %d)\n", + FAAC_CFG_VERSION, faac_cfg->version ); + faacEncClose(s->faac_handle); + return -1; + } + + /* put the options in the configuration struct */ + faac_cfg->aacObjectType = LOW; + faac_cfg->mpegVersion = MPEG4; + faac_cfg->useTns = 0; + faac_cfg->allowMidside = 1; + faac_cfg->bitRate = avctx->bit_rate; + faac_cfg->outputFormat = 0; + faac_cfg->inputFormat = FAAC_INPUT_16BIT; + + if (!faacEncSetConfiguration(s->faac_handle, faac_cfg)) { + fprintf(stderr, "libfaac doesn't support this output format!\n"); + return -1; + } + + avctx->frame_size = samples_input / avctx->channels; + + avctx->coded_frame= avcodec_alloc_frame(); + avctx->coded_frame->key_frame= 1; + + /* Set decoder specific info */ + avctx->extradata_size = 0; + if (avctx->flags & CODEC_FLAG_GLOBAL_HEADER) { + + unsigned char *buffer; + unsigned long decoder_specific_info_size; + + if (!faacEncGetDecoderSpecificInfo(s->faac_handle, &buffer, + &decoder_specific_info_size)) { + avctx->extradata = buffer; + avctx->extradata_size = decoder_specific_info_size; + } + } + + return 0; +} + +int Faac_encode_frame(AVCodecContext *avctx, + unsigned char *frame, int buf_size, void *data) +{ + FaacAudioContext *s = avctx->priv_data; + int bytes_written; + + bytes_written = faacEncEncode(s->faac_handle, + data, + avctx->frame_size * avctx->channels, + frame, + buf_size); + + return bytes_written; +} + +int Faac_encode_close(AVCodecContext *avctx) +{ + FaacAudioContext *s = avctx->priv_data; + + av_freep(&avctx->coded_frame); + + //if (avctx->extradata_size) free(avctx->extradata); + + faacEncClose(s->faac_handle); + return 0; +} + +AVCodec faac_encoder = { + "aac", + CODEC_TYPE_AUDIO, + CODEC_ID_AAC, + sizeof(FaacAudioContext), + Faac_encode_init, + Faac_encode_frame, + Faac_encode_close +}; |