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GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/h2645_parse.h	Lines:	10	11	90.9 %
Date:	2019-11-18 18:00:01	Branches:	6	8	75.0 %


/*
 * H.264/HEVC common parsing code
 *
 * 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
 */

#ifndef AVCODEC_H2645_PARSE_H
#define AVCODEC_H2645_PARSE_H

#include <stdint.h>

#include "libavutil/buffer.h"
#include "avcodec.h"
#include "get_bits.h"

#define MAX_MBPAIR_SIZE (256*1024) // a tighter bound could be calculated if someone cares about a few bytes

typedef struct H2645NAL {
    uint8_t *rbsp_buffer;

    int size;
    const uint8_t *data;

    /**
     * Size, in bits, of just the data, excluding the stop bit and any trailing
     * padding. I.e. what HEVC calls SODB.
     */
    int size_bits;

    int raw_size;
    const uint8_t *raw_data;

    GetBitContext gb;

    /**
     * NAL unit type
     */
    int type;

    /**
     * HEVC only, nuh_temporal_id_plus_1 - 1
     */
    int temporal_id;

    int skipped_bytes;
    int skipped_bytes_pos_size;
    int *skipped_bytes_pos;
    /**
     * H.264 only, nal_ref_idc
     */
    int ref_idc;
} H2645NAL;

typedef struct H2645RBSP {
    uint8_t *rbsp_buffer;
    AVBufferRef *rbsp_buffer_ref;
    int rbsp_buffer_alloc_size;
    int rbsp_buffer_size;
} H2645RBSP;

/* an input packet split into unescaped NAL units */
typedef struct H2645Packet {
    H2645NAL *nals;
    H2645RBSP rbsp;
    int nb_nals;
    int nals_allocated;
    unsigned nal_buffer_size;
} H2645Packet;

/**
 * Extract the raw (unescaped) bitstream.
 */
int ff_h2645_extract_rbsp(const uint8_t *src, int length, H2645RBSP *rbsp,
                          H2645NAL *nal, int small_padding);

/**
 * Split an input packet into NAL units.
 *
 * If data == raw_data holds true for a NAL unit of the returned pkt, then
 * said NAL unit does not contain any emulation_prevention_three_byte and
 * the data is contained in the input buffer pointed to by buf.
 * Otherwise, the unescaped data is part of the rbsp_buffer described by the
 * packet's H2645RBSP.
 *
 * If the packet's rbsp_buffer_ref is not NULL, the underlying AVBuffer must
 * own rbsp_buffer. If not and rbsp_buffer is not NULL, use_ref must be 0.
 * If use_ref is set, rbsp_buffer will be reference-counted and owned by
 * the underlying AVBuffer of rbsp_buffer_ref.
 */
int ff_h2645_packet_split(H2645Packet *pkt, const uint8_t *buf, int length,
                          void *logctx, int is_nalff, int nal_length_size,
                          enum AVCodecID codec_id, int small_padding, int use_ref);

/**
 * Free all the allocated memory in the packet.
 */
void ff_h2645_packet_uninit(H2645Packet *pkt);

static inline int get_nalsize(int nal_length_size, const uint8_t *buf,
                              int buf_size, int *buf_index, void *logctx)
{
    int i, nalsize = 0;

    if (*buf_index >= buf_size - nal_length_size) {
        // the end of the buffer is reached, refill it
        return AVERROR(EAGAIN);
    }

    for (i = 0; i < nal_length_size; i++)
        nalsize = ((unsigned)nalsize << 8) | buf[(*buf_index)++];
    if (nalsize <= 0 || nalsize > buf_size - *buf_index) {
        av_log(logctx, AV_LOG_ERROR,
               "Invalid NAL unit size (%d > %d).\n", nalsize, buf_size - *buf_index);
        return AVERROR_INVALIDDATA;
    }
    return nalsize;
}

#endif /* AVCODEC_H2645_PARSE_H */


Generated by: GCOVR (Version 4.1)

Line	Branch	Exec	Source
1			/*
2			* H.264/HEVC common parsing code
3			*
4			* This file is part of FFmpeg.
5			*
6			* FFmpeg is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU Lesser General Public
8			* License as published by the Free Software Foundation; either
9			* version 2.1 of the License, or (at your option) any later version.
10			*
11			* FFmpeg is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14			* Lesser General Public License for more details.
15			*
16			* You should have received a copy of the GNU Lesser General Public
17			* License along with FFmpeg; if not, write to the Free Software
18			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19			*/
20
21			#ifndef AVCODEC_H2645_PARSE_H
22			#define AVCODEC_H2645_PARSE_H
23
24			#include <stdint.h>
25
26			#include "libavutil/buffer.h"
27			#include "avcodec.h"
28			#include "get_bits.h"
29
30			#define MAX_MBPAIR_SIZE (256*1024) // a tighter bound could be calculated if someone cares about a few bytes
31
32			typedef struct H2645NAL {
33			uint8_t *rbsp_buffer;
34
35			int size;
36			const uint8_t *data;
37
38			/**
39			* Size, in bits, of just the data, excluding the stop bit and any trailing
40			* padding. I.e. what HEVC calls SODB.
41			*/
42			int size_bits;
43
44			int raw_size;
45			const uint8_t *raw_data;
46
47			GetBitContext gb;
48
49			/**
50			* NAL unit type
51			*/
52			int type;
53
54			/**
55			* HEVC only, nuh_temporal_id_plus_1 - 1
56			*/
57			int temporal_id;
58
59			int skipped_bytes;
60			int skipped_bytes_pos_size;
61			int *skipped_bytes_pos;
62			/**
63			* H.264 only, nal_ref_idc
64			*/
65			int ref_idc;
66			} H2645NAL;
67
68			typedef struct H2645RBSP {
69			uint8_t *rbsp_buffer;
70			AVBufferRef *rbsp_buffer_ref;
71			int rbsp_buffer_alloc_size;
72			int rbsp_buffer_size;
73			} H2645RBSP;
74
75			/* an input packet split into unescaped NAL units */
76			typedef struct H2645Packet {
77			H2645NAL *nals;
78			H2645RBSP rbsp;
79			int nb_nals;
80			int nals_allocated;
81			unsigned nal_buffer_size;
82			} H2645Packet;
83
84			/**
85			* Extract the raw (unescaped) bitstream.
86			*/
87			int ff_h2645_extract_rbsp(const uint8_t src, int length, H2645RBSP rbsp,
88			H2645NAL *nal, int small_padding);
89
90			/**
91			* Split an input packet into NAL units.
92			*
93			* If data == raw_data holds true for a NAL unit of the returned pkt, then
94			* said NAL unit does not contain any emulation_prevention_three_byte and
95			* the data is contained in the input buffer pointed to by buf.
96			* Otherwise, the unescaped data is part of the rbsp_buffer described by the
97			* packet's H2645RBSP.
98			*
99			* If the packet's rbsp_buffer_ref is not NULL, the underlying AVBuffer must
100			* own rbsp_buffer. If not and rbsp_buffer is not NULL, use_ref must be 0.
101			* If use_ref is set, rbsp_buffer will be reference-counted and owned by
102			* the underlying AVBuffer of rbsp_buffer_ref.
103			*/
104			int ff_h2645_packet_split(H2645Packet pkt, const uint8_t buf, int length,
105			void *logctx, int is_nalff, int nal_length_size,
106			enum AVCodecID codec_id, int small_padding, int use_ref);
107
108			/**
109			* Free all the allocated memory in the packet.
110			*/
111			void ff_h2645_packet_uninit(H2645Packet *pkt);
112
113		7332	static inline int get_nalsize(int nal_length_size, const uint8_t *buf,
114			int buf_size, int buf_index, void logctx)
115			{
116		7332	int i, nalsize = 0;
117
118	✗✓	7332	if (*buf_index >= buf_size - nal_length_size) {
119			// the end of the buffer is reached, refill it
120			return AVERROR(EAGAIN);
121			}
122
123	✓✓	36084	for (i = 0; i < nal_length_size; i++)
124		28752	nalsize = ((unsigned)nalsize << 8) \| buf[(*buf_index)++];
125	✓✗✓✓	7332	if (nalsize <= 0 \|\| nalsize > buf_size - *buf_index) {
126		2	av_log(logctx, AV_LOG_ERROR,
127		2	"Invalid NAL unit size (%d > %d).\n", nalsize, buf_size - *buf_index);
128		2	return AVERROR_INVALIDDATA;
129			}
130		7330	return nalsize;
131			}
132
133			#endif /* AVCODEC_H2645_PARSE_H */