FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/8bps.c	Lines:	54	77	70.1 %
Date:	2021-04-18 10:33:33	Branches:	22	32	68.8 %


/*
 * Quicktime Planar RGB (8BPS) Video Decoder
 * Copyright (C) 2003 Roberto Togni
 *
 * 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
 */

/**
 * @file
 * QT 8BPS Video Decoder by Roberto Togni
 * For more information about the 8BPS format, visit:
 *   http://www.pcisys.net/~melanson/codecs/
 *
 * Supports: PAL8 (RGB 8bpp, paletted)
 *         : BGR24 (RGB 24bpp) (can also output it as RGB32)
 *         : RGB32 (RGB 32bpp, 4th plane is alpha)
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "decode.h"
#include "internal.h"


static const enum AVPixelFormat pixfmt_rgb24[] = {
    AV_PIX_FMT_BGR24, AV_PIX_FMT_0RGB32, AV_PIX_FMT_NONE };

typedef struct EightBpsContext {
    AVCodecContext *avctx;

    unsigned char planes;
    unsigned char planemap[4];

    uint32_t pal[256];
} EightBpsContext;

static int decode_frame(AVCodecContext *avctx, void *data,
                        int *got_frame, AVPacket *avpkt)
{
    AVFrame *frame = data;
    const uint8_t *buf = avpkt->data;
    int buf_size       = avpkt->size;
    EightBpsContext * const c = avctx->priv_data;
    const unsigned char *encoded = buf;
    unsigned char *pixptr, *pixptr_end;
    unsigned int height = avctx->height; // Real image height
    unsigned int dlen, p, row;
    const unsigned char *lp, *dp, *ep;
    unsigned char count;
    unsigned int px_inc;
    unsigned int planes     = c->planes;
    unsigned char *planemap = c->planemap;
    int ret;

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

    ep = encoded + buf_size;

    /* Set data pointer after line lengths */
    dp = encoded + planes * (height << 1);

    px_inc = planes + (avctx->pix_fmt == AV_PIX_FMT_0RGB32);

    for (p = 0; p < planes; p++) {
        /* Lines length pointer for this plane */
        lp = encoded + p * (height << 1);

        /* Decode a plane */
        for (row = 0; row < height; row++) {
            pixptr = frame->data[0] + row * frame->linesize[0] + planemap[p];
            pixptr_end = pixptr + frame->linesize[0];
            if (ep - lp < row * 2 + 2)
                return AVERROR_INVALIDDATA;
            dlen = av_be2ne16(*(const unsigned short *)(lp + row * 2));
            /* Decode a row of this plane */
            while (dlen > 0) {
                if (ep - dp <= 1)
                    return AVERROR_INVALIDDATA;
                if ((count = *dp++) <= 127) {
                    count++;
                    dlen -= count + 1;
                    if (pixptr_end - pixptr < count * px_inc)
                        break;
                    if (ep - dp < count)
                        return AVERROR_INVALIDDATA;
                    while (count--) {
                        *pixptr = *dp++;
                        pixptr += px_inc;
                    }
                } else {
                    count = 257 - count;
                    if (pixptr_end - pixptr < count * px_inc)
                        break;
                    while (count--) {
                        *pixptr = *dp;
                        pixptr += px_inc;
                    }
                    dp++;
                    dlen -= 2;
                }
            }
        }
    }

    if (avctx->bits_per_coded_sample <= 8) {
        frame->palette_has_changed = ff_copy_palette(c->pal, avpkt, avctx);

        memcpy (frame->data[1], c->pal, AVPALETTE_SIZE);
    }

    *got_frame = 1;

    /* always report that the buffer was completely consumed */
    return buf_size;
}

static av_cold int decode_init(AVCodecContext *avctx)
{
    EightBpsContext * const c = avctx->priv_data;

    c->avctx       = avctx;

    switch (avctx->bits_per_coded_sample) {
    case 8:
        avctx->pix_fmt = AV_PIX_FMT_PAL8;
        c->planes      = 1;
        c->planemap[0] = 0; // 1st plane is palette indexes
        break;
    case 24:
        avctx->pix_fmt = ff_get_format(avctx, pixfmt_rgb24);
        c->planes      = 3;
        c->planemap[0] = 2; // 1st plane is red
        c->planemap[1] = 1; // 2nd plane is green
        c->planemap[2] = 0; // 3rd plane is blue
        break;
    case 32:
        avctx->pix_fmt = AV_PIX_FMT_RGB32;
        c->planes      = 4;
        /* handle planemap setup later for decoding rgb24 data as rbg32 */
        break;
    default:
        av_log(avctx, AV_LOG_ERROR, "Error: Unsupported color depth: %u.\n",
               avctx->bits_per_coded_sample);
        return AVERROR_INVALIDDATA;
    }

    if (avctx->pix_fmt == AV_PIX_FMT_RGB32) {
        c->planemap[0] = HAVE_BIGENDIAN ? 1 : 2; // 1st plane is red
        c->planemap[1] = HAVE_BIGENDIAN ? 2 : 1; // 2nd plane is green
        c->planemap[2] = HAVE_BIGENDIAN ? 3 : 0; // 3rd plane is blue
        c->planemap[3] = HAVE_BIGENDIAN ? 0 : 3; // 4th plane is alpha
    }
    return 0;
}

AVCodec ff_eightbps_decoder = {
    .name           = "8bps",
    .long_name      = NULL_IF_CONFIG_SMALL("QuickTime 8BPS video"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_8BPS,
    .priv_data_size = sizeof(EightBpsContext),
    .init           = decode_init,
    .decode         = decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1,
};


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* Quicktime Planar RGB (8BPS) Video Decoder
3			* Copyright (C) 2003 Roberto Togni
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			/**
23			* @file
24			* QT 8BPS Video Decoder by Roberto Togni
25			* For more information about the 8BPS format, visit:
26			* http://www.pcisys.net/~melanson/codecs/
27			*
28			* Supports: PAL8 (RGB 8bpp, paletted)
29			* : BGR24 (RGB 24bpp) (can also output it as RGB32)
30			* : RGB32 (RGB 32bpp, 4th plane is alpha)
31			*/
32
33			#include <stdio.h>
34			#include <stdlib.h>
35			#include <string.h>
36
37			#include "libavutil/internal.h"
38			#include "libavutil/intreadwrite.h"
39			#include "avcodec.h"
40			#include "decode.h"
41			#include "internal.h"
42
43
44			static const enum AVPixelFormat pixfmt_rgb24[] = {
45			AV_PIX_FMT_BGR24, AV_PIX_FMT_0RGB32, AV_PIX_FMT_NONE };
46
47			typedef struct EightBpsContext {
48			AVCodecContext *avctx;
49
50			unsigned char planes;
51			unsigned char planemap[4];
52
53			uint32_t pal[256];
54			} EightBpsContext;
55
56		13	static int decode_frame(AVCodecContext avctx, void data,
57			int got_frame, AVPacket avpkt)
58			{
59		13	AVFrame *frame = data;
60		13	const uint8_t *buf = avpkt->data;
61		13	int buf_size = avpkt->size;
62		13	EightBpsContext * const c = avctx->priv_data;
63		13	const unsigned char *encoded = buf;
64			unsigned char pixptr, pixptr_end;
65		13	unsigned int height = avctx->height; // Real image height
66			unsigned int dlen, p, row;
67			const unsigned char lp, dp, *ep;
68			unsigned char count;
69			unsigned int px_inc;
70		13	unsigned int planes = c->planes;
71		13	unsigned char *planemap = c->planemap;
72			int ret;
73
74	✗✓	13	if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
75			return ret;
76
77		13	ep = encoded + buf_size;
78
79			/* Set data pointer after line lengths */
80		13	dp = encoded + planes * (height << 1);
81
82		13	px_inc = planes + (avctx->pix_fmt == AV_PIX_FMT_0RGB32);
83
84	✓✓	25	for (p = 0; p < planes; p++) {
85			/* Lines length pointer for this plane */
86		13	lp = encoded + p * (height << 1);
87
88			/* Decode a plane */
89	✓✓	3051	for (row = 0; row < height; row++) {
90		3039	pixptr = frame->data[0] + row * frame->linesize[0] + planemap[p];
91		3039	pixptr_end = pixptr + frame->linesize[0];
92	✗✓	3039	if (ep - lp < row * 2 + 2)
93			return AVERROR_INVALIDDATA;
94		3039	dlen = av_be2ne16((const unsigned short )(lp + row * 2));
95			/* Decode a row of this plane */
96	✓✓	79145	while (dlen > 0) {
97	✗✓	76107	if (ep - dp <= 1)
98			return AVERROR_INVALIDDATA;
99	✓✓	76107	if ((count = *dp++) <= 127) {
100		37173	count++;
101		37173	dlen -= count + 1;
102	✗✓	37173	if (pixptr_end - pixptr < count * px_inc)
103			break;
104	✓✓	37173	if (ep - dp < count)
105		1	return AVERROR_INVALIDDATA;
106	✓✓	934711	while (count--) {
107		897539	pixptr = dp++;
108		897539	pixptr += px_inc;
109			}
110			} else {
111		38934	count = 257 - count;
112	✗✓	38934	if (pixptr_end - pixptr < count * px_inc)
113			break;
114	✓✓	235280	while (count--) {
115		196346	pixptr = dp;
116		196346	pixptr += px_inc;
117			}
118		38934	dp++;
119		38934	dlen -= 2;
120			}
121			}
122			}
123			}
124
125	✓✗	12	if (avctx->bits_per_coded_sample <= 8) {
126		12	frame->palette_has_changed = ff_copy_palette(c->pal, avpkt, avctx);
127
128		12	memcpy (frame->data[1], c->pal, AVPALETTE_SIZE);
129			}
130
131		12	*got_frame = 1;
132
133			/* always report that the buffer was completely consumed */
134		12	return buf_size;
135			}
136
137		2	static av_cold int decode_init(AVCodecContext *avctx)
138			{
139		2	EightBpsContext * const c = avctx->priv_data;
140
141		2	c->avctx = avctx;
142
143	✓✗✗✗	2	switch (avctx->bits_per_coded_sample) {
144		2	case 8:
145		2	avctx->pix_fmt = AV_PIX_FMT_PAL8;
146		2	c->planes = 1;
147		2	c->planemap[0] = 0; // 1st plane is palette indexes
148		2	break;
149			case 24:
150			avctx->pix_fmt = ff_get_format(avctx, pixfmt_rgb24);
151			c->planes = 3;
152			c->planemap[0] = 2; // 1st plane is red
153			c->planemap[1] = 1; // 2nd plane is green
154			c->planemap[2] = 0; // 3rd plane is blue
155			break;
156			case 32:
157			avctx->pix_fmt = AV_PIX_FMT_RGB32;
158			c->planes = 4;
159			/* handle planemap setup later for decoding rgb24 data as rbg32 */
160			break;
161			default:
162			av_log(avctx, AV_LOG_ERROR, "Error: Unsupported color depth: %u.\n",
163			avctx->bits_per_coded_sample);
164			return AVERROR_INVALIDDATA;
165			}
166
167	✗✓	2	if (avctx->pix_fmt == AV_PIX_FMT_RGB32) {
168			c->planemap[0] = HAVE_BIGENDIAN ? 1 : 2; // 1st plane is red
169			c->planemap[1] = HAVE_BIGENDIAN ? 2 : 1; // 2nd plane is green
170			c->planemap[2] = HAVE_BIGENDIAN ? 3 : 0; // 3rd plane is blue
171			c->planemap[3] = HAVE_BIGENDIAN ? 0 : 3; // 4th plane is alpha
172			}
173		2	return 0;
174			}
175
176			AVCodec ff_eightbps_decoder = {
177			.name = "8bps",
178			.long_name = NULL_IF_CONFIG_SMALL("QuickTime 8BPS video"),
179			.type = AVMEDIA_TYPE_VIDEO,
180			.id = AV_CODEC_ID_8BPS,
181			.priv_data_size = sizeof(EightBpsContext),
182			.init = decode_init,
183			.decode = decode_frame,
184			.capabilities = AV_CODEC_CAP_DR1,
185			};