FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/tak.c	Lines:	61	66	92.4 %
Date:	2021-01-20 23:14:43	Branches:	26	32	81.2 %


/*
 * 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"

#define BITSTREAM_READER_LE
#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 ff_tak_parse_streaminfo(TAKStreamInfo *s, GetBitContext *gb)
{
    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 avpriv_tak_parse_streaminfo(TAKStreamInfo *s, const uint8_t *buf, int size)
{
    GetBitContext gb;
    int ret = init_get_bits8(&gb, buf, size);

    if (ret < 0)
        return AVERROR_INVALIDDATA;

    ff_tak_parse_streaminfo(s, &gb);

    return 0;
}

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) {
        ff_tak_parse_streaminfo(ti, gb);

        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;
}


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* TAK common code
3			* Copyright (c) 2012 Paul B Mahol
4			*
5			* This file is part of FFmpeg.
6			*
7			* FFmpeg is free software; you can redistribute it and/or
8			* modify it under the terms of the GNU Lesser General Public
9			* License as published by the Free Software Foundation; either
10			* version 2.1 of the License, or (at your option) any later version.
11			*
12			* FFmpeg is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15			* Lesser General Public License for more details.
16			*
17			* You should have received a copy of the GNU Lesser General Public
18			* License along with FFmpeg; if not, write to the Free Software
19			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20			*/
21
22			#include "libavutil/crc.h"
23			#include "libavutil/intreadwrite.h"
24
25			#define BITSTREAM_READER_LE
26			#include "tak.h"
27
28			static const int64_t tak_channel_layouts[] = {
29			0,
30			AV_CH_FRONT_LEFT,
31			AV_CH_FRONT_RIGHT,
32			AV_CH_FRONT_CENTER,
33			AV_CH_LOW_FREQUENCY,
34			AV_CH_BACK_LEFT,
35			AV_CH_BACK_RIGHT,
36			AV_CH_FRONT_LEFT_OF_CENTER,
37			AV_CH_FRONT_RIGHT_OF_CENTER,
38			AV_CH_BACK_CENTER,
39			AV_CH_SIDE_LEFT,
40			AV_CH_SIDE_RIGHT,
41			AV_CH_TOP_CENTER,
42			AV_CH_TOP_FRONT_LEFT,
43			AV_CH_TOP_FRONT_CENTER,
44			AV_CH_TOP_FRONT_RIGHT,
45			AV_CH_TOP_BACK_LEFT,
46			AV_CH_TOP_BACK_CENTER,
47			AV_CH_TOP_BACK_RIGHT,
48			};
49
50			static const uint16_t frame_duration_type_quants[] = {
51			3, 4, 6, 8, 4096, 8192, 16384, 512, 1024, 2048,
52			};
53
54		23	static int tak_get_nb_samples(int sample_rate, enum TAKFrameSizeType type)
55			{
56			int nb_samples, max_nb_samples;
57
58	✓✓	23	if (type <= TAK_FST_250ms) {
59		21	nb_samples = sample_rate * frame_duration_type_quants[type] >>
60			TAK_FRAME_DURATION_QUANT_SHIFT;
61		21	max_nb_samples = 16384;
62	✓✓	2	} else if (type < FF_ARRAY_ELEMS(frame_duration_type_quants)) {
63		1	nb_samples = frame_duration_type_quants[type];
64		1	max_nb_samples = sample_rate *
65		1	frame_duration_type_quants[TAK_FST_250ms] >>
66			TAK_FRAME_DURATION_QUANT_SHIFT;
67			} else {
68		1	return AVERROR_INVALIDDATA;
69			}
70
71	✓✗✗✓	22	if (nb_samples <= 0 \|\| nb_samples > max_nb_samples)
72			return AVERROR_INVALIDDATA;
73
74		22	return nb_samples;
75			}
76
77		83	int ff_tak_check_crc(const uint8_t *buf, unsigned int buf_size)
78			{
79			uint32_t crc, CRC;
80
81	✗✓	83	if (buf_size < 4)
82			return AVERROR_INVALIDDATA;
83		83	buf_size -= 3;
84
85		83	CRC = AV_RB24(buf + buf_size);
86		83	crc = av_crc(av_crc_get_table(AV_CRC_24_IEEE), 0xCE04B7U, buf, buf_size);
87	✓✓	83	if (CRC != crc)
88		8	return AVERROR_INVALIDDATA;
89
90		75	return 0;
91			}
92
93		23	void ff_tak_parse_streaminfo(TAKStreamInfo s, GetBitContext gb)
94			{
95		23	uint64_t channel_mask = 0;
96			int frame_type, i;
97
98		23	s->codec = get_bits(gb, TAK_ENCODER_CODEC_BITS);
99		23	skip_bits(gb, TAK_ENCODER_PROFILE_BITS);
100
101		23	frame_type = get_bits(gb, TAK_SIZE_FRAME_DURATION_BITS);
102		23	s->samples = get_bits64(gb, TAK_SIZE_SAMPLES_NUM_BITS);
103
104		23	s->data_type = get_bits(gb, TAK_FORMAT_DATA_TYPE_BITS);
105		23	s->sample_rate = get_bits(gb, TAK_FORMAT_SAMPLE_RATE_BITS) +
106			TAK_SAMPLE_RATE_MIN;
107		23	s->bps = get_bits(gb, TAK_FORMAT_BPS_BITS) +
108			TAK_BPS_MIN;
109		23	s->channels = get_bits(gb, TAK_FORMAT_CHANNEL_BITS) +
110			TAK_CHANNELS_MIN;
111
112	✓✓	23	if (get_bits1(gb)) {
113		2	skip_bits(gb, TAK_FORMAT_VALID_BITS);
114	✓✗	2	if (get_bits1(gb)) {
115	✓✓	23	for (i = 0; i < s->channels; i++) {
116		21	int value = get_bits(gb, TAK_FORMAT_CH_LAYOUT_BITS);
117
118	✓✓	21	if (value < FF_ARRAY_ELEMS(tak_channel_layouts))
119		7	channel_mask \|= tak_channel_layouts[value];
120			}
121			}
122			}
123
124		23	s->ch_layout = channel_mask;
125		23	s->frame_samples = tak_get_nb_samples(s->sample_rate, frame_type);
126		23	}
127
128		1	int avpriv_tak_parse_streaminfo(TAKStreamInfo s, const uint8_t buf, int size)
129			{
130			GetBitContext gb;
131		1	int ret = init_get_bits8(&gb, buf, size);
132
133	✗✓	1	if (ret < 0)
134			return AVERROR_INVALIDDATA;
135
136		1	ff_tak_parse_streaminfo(s, &gb);
137
138		1	return 0;
139			}
140
141		125	int ff_tak_decode_frame_header(AVCodecContext avctx, GetBitContext gb,
142			TAKStreamInfo *ti, int log_level_offset)
143			{
144	✗✓	125	if (get_bits(gb, TAK_FRAME_HEADER_SYNC_ID_BITS) != TAK_FRAME_HEADER_SYNC_ID) {
145			av_log(avctx, AV_LOG_ERROR + log_level_offset, "missing sync id\n");
146			return AVERROR_INVALIDDATA;
147			}
148
149		125	ti->flags = get_bits(gb, TAK_FRAME_HEADER_FLAGS_BITS);
150		125	ti->frame_num = get_bits(gb, TAK_FRAME_HEADER_NO_BITS);
151
152	✓✓	125	if (ti->flags & TAK_FRAME_FLAG_IS_LAST) {
153		12	ti->last_frame_samples = get_bits(gb, TAK_FRAME_HEADER_SAMPLE_COUNT_BITS) + 1;
154		12	skip_bits(gb, 2);
155			} else {
156		113	ti->last_frame_samples = 0;
157			}
158
159	✓✓	125	if (ti->flags & TAK_FRAME_FLAG_HAS_INFO) {
160		22	ff_tak_parse_streaminfo(ti, gb);
161
162	✓✓	22	if (get_bits(gb, 6))
163		3	skip_bits(gb, 25);
164		22	align_get_bits(gb);
165			}
166
167	✓✓	125	if (ti->flags & TAK_FRAME_FLAG_HAS_METADATA)
168		3	return AVERROR_INVALIDDATA;
169
170		122	skip_bits(gb, 24);
171
172		122	return 0;
173			}