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/*
* iLBC decoder / encoder stub
* Copyright ( c ) 2012 Martin Storsjo
*
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* This file is part of FFmpeg .
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*
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* FFmpeg is free software ; you can redistribute it and / or
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* 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 .
*
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* FFmpeg is distributed in the hope that it will be useful ,
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* 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
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* License along with FFmpeg ; if not , write to the Free Software
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* Foundation , Inc . , 51 Franklin Street , Fifth Floor , Boston , MA 02110 - 1301 USA
*/
# include <ilbc.h>
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# include "libavutil/channel_layout.h"
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# include "libavutil/common.h"
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# include "libavutil/opt.h"
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# include "avcodec.h"
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# include "codec_internal.h"
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# include "encode.h"
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# include "internal.h"
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# ifndef LIBILBC_VERSION_MAJOR
# define LIBILBC_VERSION_MAJOR 2
# endif
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static int get_mode ( AVCodecContext * avctx )
{
if ( avctx - > block_align = = 38 )
return 20 ;
else if ( avctx - > block_align = = 50 )
return 30 ;
else if ( avctx - > bit_rate > 0 )
return avctx - > bit_rate < = 14000 ? 30 : 20 ;
else
return - 1 ;
}
typedef struct ILBCDecContext {
const AVClass * class ;
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# if LIBILBC_VERSION_MAJOR < 3
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iLBC_Dec_Inst_t decoder ;
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# else
IlbcDecoder decoder ;
# endif
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int enhance ;
} ILBCDecContext ;
static const AVOption ilbc_dec_options [ ] = {
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{ " enhance " , " Enhance the decoded audio (adds delay) " , offsetof ( ILBCDecContext , enhance ) , AV_OPT_TYPE_INT , { . i64 = 0 } , 0 , 1 , AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM } ,
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{ NULL }
} ;
static const AVClass ilbc_dec_class = {
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. class_name = " libilbc " ,
. item_name = av_default_item_name ,
. option = ilbc_dec_options ,
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. version = LIBAVUTIL_VERSION_INT ,
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} ;
static av_cold int ilbc_decode_init ( AVCodecContext * avctx )
{
ILBCDecContext * s = avctx - > priv_data ;
int mode ;
if ( ( mode = get_mode ( avctx ) ) < 0 ) {
av_log ( avctx , AV_LOG_ERROR , " iLBC frame mode not indicated \n " ) ;
return AVERROR ( EINVAL ) ;
}
WebRtcIlbcfix_InitDecode ( & s - > decoder , mode , s - > enhance ) ;
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av_channel_layout_uninit ( & avctx - > ch_layout ) ;
avctx - > ch_layout = ( AVChannelLayout ) AV_CHANNEL_LAYOUT_MONO ;
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avctx - > sample_rate = 8000 ;
avctx - > sample_fmt = AV_SAMPLE_FMT_S16 ;
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return 0 ;
}
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static int ilbc_decode_frame ( AVCodecContext * avctx , AVFrame * frame ,
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int * got_frame_ptr , AVPacket * avpkt )
{
const uint8_t * buf = avpkt - > data ;
int buf_size = avpkt - > size ;
ILBCDecContext * s = avctx - > priv_data ;
int ret ;
if ( s - > decoder . no_of_bytes > buf_size ) {
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# if LIBILBC_VERSION_MAJOR < 3
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av_log ( avctx , AV_LOG_ERROR , " iLBC frame too short (%u, should be %u) \n " ,
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# else
av_log ( avctx , AV_LOG_ERROR , " iLBC frame too short (%u, should be "
" % " SIZE_SPECIFIER " ) \n " ,
# endif
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buf_size , s - > decoder . no_of_bytes ) ;
return AVERROR_INVALIDDATA ;
}
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frame - > nb_samples = s - > decoder . blockl ;
lavc: factorize ff_{thread_,re,}get_buffer error messages.
Coccinelle profile used:
@@
expression r, ctx, f, loglevel, str, flags;
@@
-if ((r = ff_get_buffer(ctx, f, flags)) < 0) {
- av_log(ctx, loglevel, str);
- return r;
-}
+if ((r = ff_get_buffer(ctx, f, flags)) < 0)
+ return r;
@@
expression r, ctx, f, loglevel, str;
@@
-if ((r = ff_reget_buffer(ctx, f)) < 0) {
- av_log(ctx, loglevel, str);
- return r;
-}
+if ((r = ff_reget_buffer(ctx, f)) < 0)
+ return r;
@@
expression r, ctx, f, loglevel, str, flags;
@@
-if ((r = ff_thread_get_buffer(ctx, f, flags)) < 0) {
- av_log(ctx, loglevel, str);
- return r;
-}
+if ((r = ff_thread_get_buffer(ctx, f, flags)) < 0)
+ return r;
...along with some manual patches for the remaining ones.
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if ( ( ret = ff_get_buffer ( avctx , frame , 0 ) ) < 0 )
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return ret ;
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WebRtcIlbcfix_DecodeImpl ( ( int16_t * ) frame - > data [ 0 ] , ( const uint16_t * ) buf , & s - > decoder , 1 ) ;
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* got_frame_ptr = 1 ;
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return s - > decoder . no_of_bytes ;
}
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const FFCodec ff_libilbc_decoder = {
. p . name = " libilbc " ,
. p . long_name = NULL_IF_CONFIG_SMALL ( " iLBC (Internet Low Bitrate Codec) " ) ,
. p . type = AVMEDIA_TYPE_AUDIO ,
. p . id = AV_CODEC_ID_ILBC ,
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. priv_data_size = sizeof ( ILBCDecContext ) ,
. init = ilbc_decode_init ,
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FF_CODEC_DECODE_CB ( ilbc_decode_frame ) ,
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. p . capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF ,
. p . priv_class = & ilbc_dec_class ,
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} ;
typedef struct ILBCEncContext {
const AVClass * class ;
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# if LIBILBC_VERSION_MAJOR < 3
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iLBC_Enc_Inst_t encoder ;
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# else
IlbcEncoder encoder ;
# endif
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int mode ;
} ILBCEncContext ;
static const AVOption ilbc_enc_options [ ] = {
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{ " mode " , " iLBC mode (20 or 30 ms frames) " , offsetof ( ILBCEncContext , mode ) , AV_OPT_TYPE_INT , { . i64 = 20 } , 20 , 30 , AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM } ,
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{ NULL }
} ;
static const AVClass ilbc_enc_class = {
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. class_name = " libilbc " ,
. item_name = av_default_item_name ,
. option = ilbc_enc_options ,
. version = LIBAVUTIL_VERSION_INT ,
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} ;
static av_cold int ilbc_encode_init ( AVCodecContext * avctx )
{
ILBCEncContext * s = avctx - > priv_data ;
int mode ;
if ( avctx - > sample_rate ! = 8000 ) {
av_log ( avctx , AV_LOG_ERROR , " Only 8000Hz sample rate supported \n " ) ;
return AVERROR ( EINVAL ) ;
}
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if ( avctx - > ch_layout . nb_channels ! = 1 ) {
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av_log ( avctx , AV_LOG_ERROR , " Only mono supported \n " ) ;
return AVERROR ( EINVAL ) ;
}
if ( ( mode = get_mode ( avctx ) ) > 0 )
s - > mode = mode ;
else
s - > mode = s - > mode ! = 30 ? 20 : 30 ;
WebRtcIlbcfix_InitEncode ( & s - > encoder , s - > mode ) ;
avctx - > block_align = s - > encoder . no_of_bytes ;
avctx - > frame_size = s - > encoder . blockl ;
return 0 ;
}
static int ilbc_encode_frame ( AVCodecContext * avctx , AVPacket * avpkt ,
const AVFrame * frame , int * got_packet_ptr )
{
ILBCEncContext * s = avctx - > priv_data ;
int ret ;
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if ( ( ret = ff_alloc_packet ( avctx , avpkt , 50 ) ) < 0 )
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return ret ;
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WebRtcIlbcfix_EncodeImpl ( ( uint16_t * ) avpkt - > data , ( const int16_t * ) frame - > data [ 0 ] , & s - > encoder ) ;
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avpkt - > size = s - > encoder . no_of_bytes ;
* got_packet_ptr = 1 ;
return 0 ;
}
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static const FFCodecDefault ilbc_encode_defaults [ ] = {
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{ " b " , " 0 " } ,
{ NULL }
} ;
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const FFCodec ff_libilbc_encoder = {
. p . name = " libilbc " ,
. p . long_name = NULL_IF_CONFIG_SMALL ( " iLBC (Internet Low Bitrate Codec) " ) ,
. p . type = AVMEDIA_TYPE_AUDIO ,
. p . id = AV_CODEC_ID_ILBC ,
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. priv_data_size = sizeof ( ILBCEncContext ) ,
. init = ilbc_encode_init ,
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FF_CODEC_ENCODE_CB ( ilbc_encode_frame ) ,
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. p . sample_fmts = ( const enum AVSampleFormat [ ] ) { AV_SAMPLE_FMT_S16 ,
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AV_SAMPLE_FMT_NONE } ,
. defaults = ilbc_encode_defaults ,
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. p . priv_class = & ilbc_enc_class ,
. p . wrapper_name = " libbilbc " ,
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} ;