diff options
Diffstat (limited to 'ffmpeg/libavcodec/tak.c')
| -rw-r--r-- | ffmpeg/libavcodec/tak.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/ffmpeg/libavcodec/tak.c b/ffmpeg/libavcodec/tak.c deleted file mode 100644 index ed41ca8..0000000 --- a/ffmpeg/libavcodec/tak.c +++ /dev/null @@ -1,158 +0,0 @@ -/* - * TAK common code - * Copyright (c) 2012 Paul B Mahol - * - * 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 "libavutil/crc.h" -#include "libavutil/intreadwrite.h" -#include "tak.h" - -static const int64_t tak_channel_layouts[] = { - 0, - AV_CH_FRONT_LEFT, - AV_CH_FRONT_RIGHT, - AV_CH_FRONT_CENTER, - AV_CH_LOW_FREQUENCY, - AV_CH_BACK_LEFT, - AV_CH_BACK_RIGHT, - AV_CH_FRONT_LEFT_OF_CENTER, - AV_CH_FRONT_RIGHT_OF_CENTER, - AV_CH_BACK_CENTER, - AV_CH_SIDE_LEFT, - AV_CH_SIDE_RIGHT, - AV_CH_TOP_CENTER, - AV_CH_TOP_FRONT_LEFT, - AV_CH_TOP_FRONT_CENTER, - AV_CH_TOP_FRONT_RIGHT, - AV_CH_TOP_BACK_LEFT, - AV_CH_TOP_BACK_CENTER, - AV_CH_TOP_BACK_RIGHT, -}; - -static const uint16_t frame_duration_type_quants[] = { - 3, 4, 6, 8, 4096, 8192, 16384, 512, 1024, 2048, -}; - -static int tak_get_nb_samples(int sample_rate, enum TAKFrameSizeType type) -{ - int nb_samples, max_nb_samples; - - if (type <= TAK_FST_250ms) { - nb_samples = sample_rate * frame_duration_type_quants[type] >> - TAK_FRAME_DURATION_QUANT_SHIFT; - max_nb_samples = 16384; - } else if (type < FF_ARRAY_ELEMS(frame_duration_type_quants)) { - nb_samples = frame_duration_type_quants[type]; - max_nb_samples = sample_rate * - frame_duration_type_quants[TAK_FST_250ms] >> - TAK_FRAME_DURATION_QUANT_SHIFT; - } else { - return AVERROR_INVALIDDATA; - } - - if (nb_samples <= 0 || nb_samples > max_nb_samples) - return AVERROR_INVALIDDATA; - - return nb_samples; -} - -int ff_tak_check_crc(const uint8_t *buf, unsigned int buf_size) -{ - uint32_t crc, CRC; - - if (buf_size < 4) - return AVERROR_INVALIDDATA; - buf_size -= 3; - - CRC = AV_RB24(buf + buf_size); - crc = av_crc(av_crc_get_table(AV_CRC_24_IEEE), 0xCE04B7U, buf, buf_size); - if (CRC != crc) - return AVERROR_INVALIDDATA; - - return 0; -} - -void avpriv_tak_parse_streaminfo(GetBitContext *gb, TAKStreamInfo *s) -{ - uint64_t channel_mask = 0; - int frame_type, i; - - s->codec = get_bits(gb, TAK_ENCODER_CODEC_BITS); - skip_bits(gb, TAK_ENCODER_PROFILE_BITS); - - frame_type = get_bits(gb, TAK_SIZE_FRAME_DURATION_BITS); - s->samples = get_bits64(gb, TAK_SIZE_SAMPLES_NUM_BITS); - - s->data_type = get_bits(gb, TAK_FORMAT_DATA_TYPE_BITS); - s->sample_rate = get_bits(gb, TAK_FORMAT_SAMPLE_RATE_BITS) + - TAK_SAMPLE_RATE_MIN; - s->bps = get_bits(gb, TAK_FORMAT_BPS_BITS) + - TAK_BPS_MIN; - s->channels = get_bits(gb, TAK_FORMAT_CHANNEL_BITS) + - TAK_CHANNELS_MIN; - - if (get_bits1(gb)) { - skip_bits(gb, TAK_FORMAT_VALID_BITS); - if (get_bits1(gb)) { - for (i = 0; i < s->channels; i++) { - int value = get_bits(gb, TAK_FORMAT_CH_LAYOUT_BITS); - - if (value < FF_ARRAY_ELEMS(tak_channel_layouts)) - channel_mask |= tak_channel_layouts[value]; - } - } - } - - s->ch_layout = channel_mask; - s->frame_samples = tak_get_nb_samples(s->sample_rate, frame_type); -} - -int ff_tak_decode_frame_header(AVCodecContext *avctx, GetBitContext *gb, - TAKStreamInfo *ti, int log_level_offset) -{ - if (get_bits(gb, TAK_FRAME_HEADER_SYNC_ID_BITS) != TAK_FRAME_HEADER_SYNC_ID) { - av_log(avctx, AV_LOG_ERROR + log_level_offset, "missing sync id\n"); - return AVERROR_INVALIDDATA; - } - - ti->flags = get_bits(gb, TAK_FRAME_HEADER_FLAGS_BITS); - ti->frame_num = get_bits(gb, TAK_FRAME_HEADER_NO_BITS); - - if (ti->flags & TAK_FRAME_FLAG_IS_LAST) { - ti->last_frame_samples = get_bits(gb, TAK_FRAME_HEADER_SAMPLE_COUNT_BITS) + 1; - skip_bits(gb, 2); - } else { - ti->last_frame_samples = 0; - } - - if (ti->flags & TAK_FRAME_FLAG_HAS_INFO) { - avpriv_tak_parse_streaminfo(gb, ti); - - if (get_bits(gb, 6)) - skip_bits(gb, 25); - align_get_bits(gb); - } - - if (ti->flags & TAK_FRAME_FLAG_HAS_METADATA) - return AVERROR_INVALIDDATA; - - skip_bits(gb, 24); - - return 0; -} |