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GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/8bps.c	Lines:	58	82	70.7 %
Date:	2019-11-18 18:00:01	Branches:	26	38	68.4 %


/*
 * 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 "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) {
        int size;
        const uint8_t *pal = av_packet_get_side_data(avpkt,
                                                     AV_PKT_DATA_PALETTE,
                                                     &size);
        if (pal && size == AVPALETTE_SIZE) {
            frame->palette_has_changed = 1;
            memcpy(c->pal, pal, AVPALETTE_SIZE);
        } else if (pal) {
            av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
        }

        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 4.1)

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 "internal.h"
41
42
43			static const enum AVPixelFormat pixfmt_rgb24[] = {
44			AV_PIX_FMT_BGR24, AV_PIX_FMT_0RGB32, AV_PIX_FMT_NONE };
45
46			typedef struct EightBpsContext {
47			AVCodecContext *avctx;
48
49			unsigned char planes;
50			unsigned char planemap[4];
51
52			uint32_t pal[256];
53			} EightBpsContext;
54
55		13	static int decode_frame(AVCodecContext avctx, void data,
56			int got_frame, AVPacket avpkt)
57			{
58		13	AVFrame *frame = data;
59		13	const uint8_t *buf = avpkt->data;
60		13	int buf_size = avpkt->size;
61		13	EightBpsContext * const c = avctx->priv_data;
62		13	const unsigned char *encoded = buf;
63			unsigned char pixptr, pixptr_end;
64		13	unsigned int height = avctx->height; // Real image height
65			unsigned int dlen, p, row;
66			const unsigned char lp, dp, *ep;
67			unsigned char count;
68			unsigned int px_inc;
69		13	unsigned int planes = c->planes;
70		13	unsigned char *planemap = c->planemap;
71			int ret;
72
73	✗✓	13	if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
74			return ret;
75
76		13	ep = encoded + buf_size;
77
78			/* Set data pointer after line lengths */
79		13	dp = encoded + planes * (height << 1);
80
81		13	px_inc = planes + (avctx->pix_fmt == AV_PIX_FMT_0RGB32);
82
83	✓✓	25	for (p = 0; p < planes; p++) {
84			/* Lines length pointer for this plane */
85		13	lp = encoded + p * (height << 1);
86
87			/* Decode a plane */
88	✓✓	3051	for (row = 0; row < height; row++) {
89		3039	pixptr = frame->data[0] + row * frame->linesize[0] + planemap[p];
90		3039	pixptr_end = pixptr + frame->linesize[0];
91	✗✓	3039	if (ep - lp < row * 2 + 2)
92			return AVERROR_INVALIDDATA;
93		3039	dlen = av_be2ne16((const unsigned short )(lp + row * 2));
94			/* Decode a row of this plane */
95	✓✓	79145	while (dlen > 0) {
96	✗✓	76107	if (ep - dp <= 1)
97			return AVERROR_INVALIDDATA;
98	✓✓	76107	if ((count = *dp++) <= 127) {
99		37173	count++;
100		37173	dlen -= count + 1;
101	✗✓	37173	if (pixptr_end - pixptr < count * px_inc)
102			break;
103	✓✓	37173	if (ep - dp < count)
104		1	return AVERROR_INVALIDDATA;
105	✓✓	934711	while (count--) {
106		897539	pixptr = dp++;
107		897539	pixptr += px_inc;
108			}
109			} else {
110		38934	count = 257 - count;
111	✗✓	38934	if (pixptr_end - pixptr < count * px_inc)
112			break;
113	✓✓	235280	while (count--) {
114		196346	pixptr = dp;
115		196346	pixptr += px_inc;
116			}
117		38934	dp++;
118		38934	dlen -= 2;
119			}
120			}
121			}
122			}
123
124	✓✗	12	if (avctx->bits_per_coded_sample <= 8) {
125			int size;
126		12	const uint8_t *pal = av_packet_get_side_data(avpkt,
127			AV_PKT_DATA_PALETTE,
128			&size);
129	✓✓✓✗	12	if (pal && size == AVPALETTE_SIZE) {
130		1	frame->palette_has_changed = 1;
131		1	memcpy(c->pal, pal, AVPALETTE_SIZE);
132	✗✓	11	} else if (pal) {
133			av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
134			}
135
136		12	memcpy (frame->data[1], c->pal, AVPALETTE_SIZE);
137			}
138
139		12	*got_frame = 1;
140
141			/* always report that the buffer was completely consumed */
142		12	return buf_size;
143			}
144
145		2	static av_cold int decode_init(AVCodecContext *avctx)
146			{
147		2	EightBpsContext * const c = avctx->priv_data;
148
149		2	c->avctx = avctx;
150
151	✓✗✗✗	2	switch (avctx->bits_per_coded_sample) {
152		2	case 8:
153		2	avctx->pix_fmt = AV_PIX_FMT_PAL8;
154		2	c->planes = 1;
155		2	c->planemap[0] = 0; // 1st plane is palette indexes
156		2	break;
157			case 24:
158			avctx->pix_fmt = ff_get_format(avctx, pixfmt_rgb24);
159			c->planes = 3;
160			c->planemap[0] = 2; // 1st plane is red
161			c->planemap[1] = 1; // 2nd plane is green
162			c->planemap[2] = 0; // 3rd plane is blue
163			break;
164			case 32:
165			avctx->pix_fmt = AV_PIX_FMT_RGB32;
166			c->planes = 4;
167			/* handle planemap setup later for decoding rgb24 data as rbg32 */
168			break;
169			default:
170			av_log(avctx, AV_LOG_ERROR, "Error: Unsupported color depth: %u.\n",
171			avctx->bits_per_coded_sample);
172			return AVERROR_INVALIDDATA;
173			}
174
175	✗✓	2	if (avctx->pix_fmt == AV_PIX_FMT_RGB32) {
176			c->planemap[0] = HAVE_BIGENDIAN ? 1 : 2; // 1st plane is red
177			c->planemap[1] = HAVE_BIGENDIAN ? 2 : 1; // 2nd plane is green
178			c->planemap[2] = HAVE_BIGENDIAN ? 3 : 0; // 3rd plane is blue
179			c->planemap[3] = HAVE_BIGENDIAN ? 0 : 3; // 4th plane is alpha
180			}
181		2	return 0;
182			}
183
184			AVCodec ff_eightbps_decoder = {
185			.name = "8bps",
186			.long_name = NULL_IF_CONFIG_SMALL("QuickTime 8BPS video"),
187			.type = AVMEDIA_TYPE_VIDEO,
188			.id = AV_CODEC_ID_8BPS,
189			.priv_data_size = sizeof(EightBpsContext),
190			.init = decode_init,
191			.decode = decode_frame,
192			.capabilities = AV_CODEC_CAP_DR1,
193			};