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GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/aliaspixdec.c	Lines:	41	54	75.9 %
Date:	2020-01-27 20:17:04	Branches:	22	32	68.8 %


/*
 * Alias PIX image decoder
 * Copyright (C) 2014 Vittorio Giovara <vittorio.giovara@gmail.com>
 *
 * 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/intreadwrite.h"

#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"

#define ALIAS_HEADER_SIZE 10

static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
                        AVPacket *avpkt)
{
    AVFrame *f = data;
    GetByteContext gb;
    int width, height, ret, bits_pixel, pixel;
    uint8_t *out_buf;
    uint8_t count;
    int x, y;

    bytestream2_init(&gb, avpkt->data, avpkt->size);

    if (bytestream2_get_bytes_left(&gb) < ALIAS_HEADER_SIZE) {
        av_log(avctx, AV_LOG_ERROR, "Header too small %d.\n", avpkt->size);
        return AVERROR_INVALIDDATA;
    }

    width  = bytestream2_get_be16u(&gb);
    height = bytestream2_get_be16u(&gb);
    bytestream2_skipu(&gb, 4); // obsolete X, Y offset
    bits_pixel = bytestream2_get_be16u(&gb);

    if (bits_pixel == 24)
        avctx->pix_fmt = AV_PIX_FMT_BGR24;
    else if (bits_pixel == 8)
        avctx->pix_fmt = AV_PIX_FMT_GRAY8;
    else {
        av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n");
        return AVERROR_INVALIDDATA;
    }

    ret = ff_set_dimensions(avctx, width, height);
    if (ret < 0)
        return ret;

    if (bytestream2_get_bytes_left(&gb) < width*height / 255)
        return AVERROR_INVALIDDATA;

    ret = ff_get_buffer(avctx, f, 0);
    if (ret < 0)
        return ret;

    f->pict_type = AV_PICTURE_TYPE_I;
    f->key_frame = 1;

    x = 0;
    y = 1;
    out_buf = f->data[0];
    while (bytestream2_get_bytes_left(&gb) > 0) {
        int i;

        /* set buffer at the right position at every new line */
        if (x == avctx->width) {
            x = 0;
            out_buf = f->data[0] + f->linesize[0] * y++;
            if (y > avctx->height) {
                av_log(avctx, AV_LOG_ERROR,
                       "Ended frame decoding with %d bytes left.\n",
                       bytestream2_get_bytes_left(&gb));
                return AVERROR_INVALIDDATA;
            }
        }

        /* read packet and copy data */
        count = bytestream2_get_byteu(&gb);
        if (!count || x + count > avctx->width) {
            av_log(avctx, AV_LOG_ERROR, "Invalid run length %d.\n", count);
            return AVERROR_INVALIDDATA;
        }

        if (avctx->pix_fmt == AV_PIX_FMT_BGR24) {
            pixel = bytestream2_get_be24(&gb);
            for (i = 0; i < count; i++) {
                AV_WB24(out_buf, pixel);
                out_buf += 3;
            }
        } else { // AV_PIX_FMT_GRAY8
            pixel = bytestream2_get_byte(&gb);
            for (i = 0; i < count; i++)
                *out_buf++ = pixel;
        }

        x += i;
    }

    if (x != width || y != height) {
        av_log(avctx, AV_LOG_ERROR, "Picture stopped at %d,%d.\n", x, y);
        return AVERROR_INVALIDDATA;
    }

    *got_frame = 1;
    return avpkt->size;
}

AVCodec ff_alias_pix_decoder = {
    .name         = "alias_pix",
    .long_name    = NULL_IF_CONFIG_SMALL("Alias/Wavefront PIX image"),
    .type         = AVMEDIA_TYPE_VIDEO,
    .id           = AV_CODEC_ID_ALIAS_PIX,
    .decode       = decode_frame,
    .capabilities = AV_CODEC_CAP_DR1,
};


Generated by: GCOVR (Version 4.1)

Line	Branch	Exec	Source
1			/*
2			* Alias PIX image decoder
3			* Copyright (C) 2014 Vittorio Giovara <vittorio.giovara@gmail.com>
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/intreadwrite.h"
23
24			#include "avcodec.h"
25			#include "bytestream.h"
26			#include "internal.h"
27
28			#define ALIAS_HEADER_SIZE 10
29
30		4	static int decode_frame(AVCodecContext avctx, void data, int *got_frame,
31			AVPacket *avpkt)
32			{
33		4	AVFrame *f = data;
34			GetByteContext gb;
35			int width, height, ret, bits_pixel, pixel;
36			uint8_t *out_buf;
37			uint8_t count;
38			int x, y;
39
40		4	bytestream2_init(&gb, avpkt->data, avpkt->size);
41
42	✗✓	4	if (bytestream2_get_bytes_left(&gb) < ALIAS_HEADER_SIZE) {
43			av_log(avctx, AV_LOG_ERROR, "Header too small %d.\n", avpkt->size);
44			return AVERROR_INVALIDDATA;
45			}
46
47		4	width = bytestream2_get_be16u(&gb);
48		4	height = bytestream2_get_be16u(&gb);
49		4	bytestream2_skipu(&gb, 4); // obsolete X, Y offset
50		4	bits_pixel = bytestream2_get_be16u(&gb);
51
52	✓✓	4	if (bits_pixel == 24)
53		2	avctx->pix_fmt = AV_PIX_FMT_BGR24;
54	✓✗	2	else if (bits_pixel == 8)
55		2	avctx->pix_fmt = AV_PIX_FMT_GRAY8;
56			else {
57			av_log(avctx, AV_LOG_ERROR, "Invalid pixel format.\n");
58			return AVERROR_INVALIDDATA;
59			}
60
61		4	ret = ff_set_dimensions(avctx, width, height);
62	✗✓	4	if (ret < 0)
63			return ret;
64
65	✗✓	4	if (bytestream2_get_bytes_left(&gb) < width*height / 255)
66			return AVERROR_INVALIDDATA;
67
68		4	ret = ff_get_buffer(avctx, f, 0);
69	✗✓	4	if (ret < 0)
70			return ret;
71
72		4	f->pict_type = AV_PICTURE_TYPE_I;
73		4	f->key_frame = 1;
74
75		4	x = 0;
76		4	y = 1;
77		4	out_buf = f->data[0];
78	✓✓	60402	while (bytestream2_get_bytes_left(&gb) > 0) {
79			int i;
80
81			/* set buffer at the right position at every new line */
82	✓✓	60398	if (x == avctx->width) {
83		316	x = 0;
84		316	out_buf = f->data[0] + f->linesize[0] * y++;
85	✗✓	316	if (y > avctx->height) {
86			av_log(avctx, AV_LOG_ERROR,
87			"Ended frame decoding with %d bytes left.\n",
88			bytestream2_get_bytes_left(&gb));
89			return AVERROR_INVALIDDATA;
90			}
91			}
92
93			/* read packet and copy data */
94		60398	count = bytestream2_get_byteu(&gb);
95	✓✗✗✓	60398	if (!count \|\| x + count > avctx->width) {
96			av_log(avctx, AV_LOG_ERROR, "Invalid run length %d.\n", count);
97			return AVERROR_INVALIDDATA;
98			}
99
100	✓✓	60398	if (avctx->pix_fmt == AV_PIX_FMT_BGR24) {
101		31540	pixel = bytestream2_get_be24(&gb);
102	✓✓	63298	for (i = 0; i < count; i++) {
103		31758	AV_WB24(out_buf, pixel);
104		31758	out_buf += 3;
105			}
106			} else { // AV_PIX_FMT_GRAY8
107		28858	pixel = bytestream2_get_byte(&gb);
108	✓✓	61096	for (i = 0; i < count; i++)
109		32238	*out_buf++ = pixel;
110			}
111
112		60398	x += i;
113			}
114
115	✓✗✗✓	4	if (x != width \|\| y != height) {
116			av_log(avctx, AV_LOG_ERROR, "Picture stopped at %d,%d.\n", x, y);
117			return AVERROR_INVALIDDATA;
118			}
119
120		4	*got_frame = 1;
121		4	return avpkt->size;
122			}
123
124			AVCodec ff_alias_pix_decoder = {
125			.name = "alias_pix",
126			.long_name = NULL_IF_CONFIG_SMALL("Alias/Wavefront PIX image"),
127			.type = AVMEDIA_TYPE_VIDEO,
128			.id = AV_CODEC_ID_ALIAS_PIX,
129			.decode = decode_frame,
130			.capabilities = AV_CODEC_CAP_DR1,
131			};