GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/dca.c Lines: 48 76 63.2 %
Date: 2019-11-22 03:34:36 Branches: 14 36 38.9 %

Line Branch Exec Source
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/*
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 * DCA compatible decoder data
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 * Copyright (C) 2004 Gildas Bazin
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 * Copyright (C) 2004 Benjamin Zores
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 * Copyright (C) 2006 Benjamin Larsson
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 * Copyright (C) 2007 Konstantin Shishkov
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 *
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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
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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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
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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 FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include <stdint.h>
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#include <string.h>
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#include "libavutil/error.h"
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#include "dca.h"
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#include "dca_core.h"
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#include "dca_syncwords.h"
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#include "get_bits.h"
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#include "put_bits.h"
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const uint32_t avpriv_dca_sample_rates[16] = {
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    0, 8000, 16000, 32000, 0, 0, 11025, 22050, 44100, 0, 0,
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    12000, 24000, 48000, 96000, 192000
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};
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const uint32_t ff_dca_sampling_freqs[16] = {
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      8000,  16000, 32000, 64000, 128000, 22050,  44100,  88200,
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    176400, 352800, 12000, 24000,  48000, 96000, 192000, 384000,
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};
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const uint8_t ff_dca_freq_ranges[16] = {
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    0, 1, 2, 3, 4, 1, 2, 3, 4, 4, 0, 1, 2, 3, 4, 4
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};
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const uint8_t ff_dca_bits_per_sample[8] = {
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    16, 16, 20, 20, 0, 24, 24, 0
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};
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int avpriv_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst,
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                             int max_size)
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{
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    uint32_t mrk;
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    int i, tmp;
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    PutBitContext pb;
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    if ((unsigned) src_size > (unsigned) max_size)
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        src_size = max_size;
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    mrk = AV_RB32(src);
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    switch (mrk) {
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    case DCA_SYNCWORD_CORE_BE:
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    case DCA_SYNCWORD_SUBSTREAM:
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        memcpy(dst, src, src_size);
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        return src_size;
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    case DCA_SYNCWORD_CORE_LE:
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        for (i = 0; i < (src_size + 1) >> 1; i++) {
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            AV_WB16(dst, AV_RL16(src));
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            src += 2;
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            dst += 2;
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        }
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        return src_size;
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    case DCA_SYNCWORD_CORE_14B_BE:
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    case DCA_SYNCWORD_CORE_14B_LE:
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        init_put_bits(&pb, dst, max_size);
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        for (i = 0; i < (src_size + 1) >> 1; i++, src += 2) {
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            tmp = ((mrk == DCA_SYNCWORD_CORE_14B_BE) ? AV_RB16(src) : AV_RL16(src)) & 0x3FFF;
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            put_bits(&pb, 14, tmp);
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        }
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        flush_put_bits(&pb);
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        return (put_bits_count(&pb) + 7) >> 3;
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    default:
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        return AVERROR_INVALIDDATA;
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    }
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}
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int ff_dca_parse_core_frame_header(DCACoreFrameHeader *h, GetBitContext *gb)
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{
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    if (get_bits_long(gb, 32) != DCA_SYNCWORD_CORE_BE)
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        return DCA_PARSE_ERROR_SYNC_WORD;
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    h->normal_frame = get_bits1(gb);
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    h->deficit_samples = get_bits(gb, 5) + 1;
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    if (h->deficit_samples != DCA_PCMBLOCK_SAMPLES)
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        return DCA_PARSE_ERROR_DEFICIT_SAMPLES;
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    h->crc_present = get_bits1(gb);
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    h->npcmblocks = get_bits(gb, 7) + 1;
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    if (h->npcmblocks & (DCA_SUBBAND_SAMPLES - 1))
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        return DCA_PARSE_ERROR_PCM_BLOCKS;
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    h->frame_size = get_bits(gb, 14) + 1;
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    if (h->frame_size < 96)
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        return DCA_PARSE_ERROR_FRAME_SIZE;
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    h->audio_mode = get_bits(gb, 6);
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    if (h->audio_mode >= DCA_AMODE_COUNT)
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        return DCA_PARSE_ERROR_AMODE;
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    h->sr_code = get_bits(gb, 4);
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    if (!avpriv_dca_sample_rates[h->sr_code])
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        return DCA_PARSE_ERROR_SAMPLE_RATE;
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    h->br_code = get_bits(gb, 5);
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    if (get_bits1(gb))
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        return DCA_PARSE_ERROR_RESERVED_BIT;
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    h->drc_present = get_bits1(gb);
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    h->ts_present = get_bits1(gb);
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    h->aux_present = get_bits1(gb);
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    h->hdcd_master = get_bits1(gb);
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    h->ext_audio_type = get_bits(gb, 3);
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    h->ext_audio_present = get_bits1(gb);
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    h->sync_ssf = get_bits1(gb);
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    h->lfe_present = get_bits(gb, 2);
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    if (h->lfe_present == DCA_LFE_FLAG_INVALID)
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        return DCA_PARSE_ERROR_LFE_FLAG;
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    h->predictor_history = get_bits1(gb);
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    if (h->crc_present)
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        skip_bits(gb, 16);
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    h->filter_perfect = get_bits1(gb);
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    h->encoder_rev = get_bits(gb, 4);
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    h->copy_hist = get_bits(gb, 2);
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    h->pcmr_code = get_bits(gb, 3);
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    if (!ff_dca_bits_per_sample[h->pcmr_code])
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        return DCA_PARSE_ERROR_PCM_RES;
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    h->sumdiff_front = get_bits1(gb);
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    h->sumdiff_surround = get_bits1(gb);
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    h->dn_code = get_bits(gb, 4);
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    return 0;
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}
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int avpriv_dca_parse_core_frame_header(DCACoreFrameHeader *h, const uint8_t *buf, int size)
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{
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    GetBitContext gb;
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    int ret;
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    ret = init_get_bits8(&gb, buf, size);
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    if (ret < 0)
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        return ret;
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    if (ff_dca_parse_core_frame_header(h, &gb) < 0)
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        return AVERROR_INVALIDDATA;
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    return 0;
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}