diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/aac_parser.c')
-rw-r--r-- | contrib/ffmpeg/libavcodec/aac_parser.c | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/contrib/ffmpeg/libavcodec/aac_parser.c b/contrib/ffmpeg/libavcodec/aac_parser.c deleted file mode 100644 index ac806931e..000000000 --- a/contrib/ffmpeg/libavcodec/aac_parser.c +++ /dev/null @@ -1,100 +0,0 @@ -/* - * Audio and Video frame extraction - * Copyright (c) 2003 Fabrice Bellard. - * Copyright (c) 2003 Michael Niedermayer. - * - * This file is part of FFmpeg. - * - * FFmpeg 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. - * - * FFmpeg 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 FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "parser.h" -#include "aac_ac3_parser.h" -#include "bitstream.h" - - -#define AAC_HEADER_SIZE 7 - - -static const int aac_sample_rates[16] = { - 96000, 88200, 64000, 48000, 44100, 32000, - 24000, 22050, 16000, 12000, 11025, 8000, 7350 -}; - -static const int aac_channels[8] = { - 0, 1, 2, 3, 4, 5, 6, 8 -}; - - -static int aac_sync(const uint8_t *buf, int *channels, int *sample_rate, - int *bit_rate, int *samples) -{ - GetBitContext bits; - int size, rdb, ch, sr; - - init_get_bits(&bits, buf, AAC_HEADER_SIZE * 8); - - if(get_bits(&bits, 12) != 0xfff) - return 0; - - skip_bits1(&bits); /* id */ - skip_bits(&bits, 2); /* layer */ - skip_bits1(&bits); /* protection_absent */ - skip_bits(&bits, 2); /* profile_objecttype */ - sr = get_bits(&bits, 4); /* sample_frequency_index */ - if(!aac_sample_rates[sr]) - return 0; - skip_bits1(&bits); /* private_bit */ - ch = get_bits(&bits, 3); /* channel_configuration */ - if(!aac_channels[ch]) - return 0; - skip_bits1(&bits); /* original/copy */ - skip_bits1(&bits); /* home */ - - /* adts_variable_header */ - skip_bits1(&bits); /* copyright_identification_bit */ - skip_bits1(&bits); /* copyright_identification_start */ - size = get_bits(&bits, 13); /* aac_frame_length */ - if(size < AAC_HEADER_SIZE) - return 0; - - skip_bits(&bits, 11); /* adts_buffer_fullness */ - rdb = get_bits(&bits, 2); /* number_of_raw_data_blocks_in_frame */ - - *channels = aac_channels[ch]; - *sample_rate = aac_sample_rates[sr]; - *samples = (rdb + 1) * 1024; - *bit_rate = size * 8 * *sample_rate / *samples; - - return size; -} - -static int aac_parse_init(AVCodecParserContext *s1) -{ - AACAC3ParseContext *s = s1->priv_data; - s->inbuf_ptr = s->inbuf; - s->header_size = AAC_HEADER_SIZE; - s->sync = aac_sync; - return 0; -} - - -AVCodecParser aac_parser = { - { CODEC_ID_AAC }, - sizeof(AACAC3ParseContext), - aac_parse_init, - ff_aac_ac3_parse, - NULL, -}; |