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GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/bintext.c	Lines:	0	113	0.0 %
Date:	2020-01-27 20:17:04	Branches:	0	70	0.0 %


/*
 * Binary text decoder
 * eXtended BINary text (XBIN) decoder
 * iCEDraw File decoder
 * Copyright (c) 2010 Peter Ross (pross@xvid.org)
 *
 * 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
 * Binary text decoder
 * eXtended BINary text (XBIN) decoder
 * iCEDraw File decoder
 */

#include "libavutil/intreadwrite.h"
#include "libavutil/xga_font_data.h"
#include "avcodec.h"
#include "cga_data.h"
#include "bintext.h"
#include "internal.h"

#define FONT_WIDTH 8

typedef struct XbinContext {
    AVFrame *frame;
    int palette[16];
    int flags;
    int font_height;
    const uint8_t *font;
    int x, y;
} XbinContext;

static av_cold int decode_init(AVCodecContext *avctx)
{
    XbinContext *s = avctx->priv_data;
    uint8_t *p;
    int i;

    avctx->pix_fmt = AV_PIX_FMT_PAL8;
    p = avctx->extradata;
    if (p) {
        s->font_height = p[0];
        s->flags = p[1];
        p += 2;
        if(avctx->extradata_size < 2 + (!!(s->flags & BINTEXT_PALETTE))*3*16
                                     + (!!(s->flags & BINTEXT_FONT))*s->font_height*256) {
            av_log(avctx, AV_LOG_ERROR, "not enough extradata\n");
            return AVERROR_INVALIDDATA;
        }
        if (!s->font_height) {
            av_log(avctx, AV_LOG_ERROR, "invalid font height\n");
            return AVERROR_INVALIDDATA;
        }
    } else {
        s->font_height = 8;
        s->flags = 0;
    }

    if ((s->flags & BINTEXT_PALETTE)) {
        for (i = 0; i < 16; i++) {
            s->palette[i] = 0xFF000000 | (AV_RB24(p) << 2) | ((AV_RB24(p) >> 4) & 0x30303);
            p += 3;
        }
    } else {
        for (i = 0; i < 16; i++)
            s->palette[i] = 0xFF000000 | ff_cga_palette[i];
    }

    if ((s->flags & BINTEXT_FONT)) {
        s->font = p;
    } else {
        switch(s->font_height) {
        default:
            av_log(avctx, AV_LOG_WARNING, "font height %i not supported\n", s->font_height);
            s->font_height = 8;
        case 8:
            s->font = avpriv_cga_font;
            break;
        case 16:
            s->font = avpriv_vga16_font;
            break;
        }
    }
    if (avctx->width < FONT_WIDTH || avctx->height < s->font_height) {
        av_log(avctx, AV_LOG_ERROR, "Resolution too small for font.\n");
        return AVERROR_INVALIDDATA;
    }

    return 0;
}

#define DEFAULT_BG_COLOR 0
av_unused static void hscroll(AVCodecContext *avctx)
{
    XbinContext *s = avctx->priv_data;
    if (s->y < avctx->height - s->font_height) {
        s->y += s->font_height;
    } else {
        memmove(s->frame->data[0], s->frame->data[0] + s->font_height*s->frame->linesize[0],
            (avctx->height - s->font_height)*s->frame->linesize[0]);
        memset(s->frame->data[0] + (avctx->height - s->font_height)*s->frame->linesize[0],
            DEFAULT_BG_COLOR, s->font_height * s->frame->linesize[0]);
    }
}

/**
 * Draw character to screen
 */
static void draw_char(AVCodecContext *avctx, int c, int a)
{
    XbinContext *s = avctx->priv_data;
    if (s->y > avctx->height - s->font_height)
        return;
    ff_draw_pc_font(s->frame->data[0] + s->y * s->frame->linesize[0] + s->x,
                    s->frame->linesize[0], s->font, s->font_height, c,
                    a & 0x0F, a >> 4);
    s->x += FONT_WIDTH;
    if (s->x > avctx->width - FONT_WIDTH) {
        s->x = 0;
        s->y += s->font_height;
    }
}

static int decode_frame(AVCodecContext *avctx,
                            void *data, int *got_frame,
                            AVPacket *avpkt)
{
    XbinContext *s = avctx->priv_data;
    const uint8_t *buf = avpkt->data;
    int buf_size = avpkt->size;
    const uint8_t *buf_end = buf+buf_size;
    int ret;

    if ((avctx->width / FONT_WIDTH) * (avctx->height / s->font_height) / 256 > buf_size)
        return AVERROR_INVALIDDATA;

    s->frame = data;
    s->x = s->y = 0;
    if ((ret = ff_get_buffer(avctx, s->frame, 0)) < 0)
        return ret;
    s->frame->pict_type           = AV_PICTURE_TYPE_I;
    s->frame->palette_has_changed = 1;
    memcpy(s->frame->data[1], s->palette, 16 * 4);

    if (avctx->codec_id == AV_CODEC_ID_XBIN) {
        while (buf + 2 < buf_end) {
            int i,c,a;
            int type  = *buf >> 6;
            int count = (*buf & 0x3F) + 1;
            buf++;
            switch (type) {
            case 0: //no compression
                for (i = 0; i < count && buf + 1 < buf_end; i++) {
                    draw_char(avctx, buf[0], buf[1]);
                    buf += 2;
                }
                break;
            case 1: //character compression
                c = *buf++;
                for (i = 0; i < count && buf < buf_end; i++)
                    draw_char(avctx, c, *buf++);
                break;
            case 2: //attribute compression
                a = *buf++;
                for (i = 0; i < count && buf < buf_end; i++)
                    draw_char(avctx, *buf++, a);
                break;
            case 3: //character/attribute compression
                c = *buf++;
                a = *buf++;
                for (i = 0; i < count && buf < buf_end; i++)
                    draw_char(avctx, c, a);
                break;
            }
        }
    } else if (avctx->codec_id == AV_CODEC_ID_IDF) {
        while (buf + 2 < buf_end) {
            if (AV_RL16(buf) == 1) {
               int i;
               if (buf + 6 > buf_end)
                   break;
               for (i = 0; i < buf[2]; i++)
                   draw_char(avctx, buf[4], buf[5]);
               buf += 6;
            } else {
               draw_char(avctx, buf[0], buf[1]);
               buf += 2;
            }
        }
    } else {
        while (buf + 1 < buf_end) {
            draw_char(avctx, buf[0], buf[1]);
            buf += 2;
        }
    }

    *got_frame      = 1;
    return buf_size;
}

#if CONFIG_BINTEXT_DECODER
AVCodec ff_bintext_decoder = {
    .name           = "bintext",
    .long_name      = NULL_IF_CONFIG_SMALL("Binary text"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_BINTEXT,
    .priv_data_size = sizeof(XbinContext),
    .init           = decode_init,
    .decode         = decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1,
};
#endif
#if CONFIG_XBIN_DECODER
AVCodec ff_xbin_decoder = {
    .name           = "xbin",
    .long_name      = NULL_IF_CONFIG_SMALL("eXtended BINary text"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_XBIN,
    .priv_data_size = sizeof(XbinContext),
    .init           = decode_init,
    .decode         = decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1,
};
#endif
#if CONFIG_IDF_DECODER
AVCodec ff_idf_decoder = {
    .name           = "idf",
    .long_name      = NULL_IF_CONFIG_SMALL("iCEDraw text"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_IDF,
    .priv_data_size = sizeof(XbinContext),
    .init           = decode_init,
    .decode         = decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1,
};
#endif


Generated by: GCOVR (Version 4.1)

Line	Branch	Exec	Source
1			/*
2			* Binary text decoder
3			* eXtended BINary text (XBIN) decoder
4			* iCEDraw File decoder
5			* Copyright (c) 2010 Peter Ross (pross@xvid.org)
6			*
7			* This file is part of FFmpeg.
8			*
9			* FFmpeg is free software; you can redistribute it and/or
10			* modify it under the terms of the GNU Lesser General Public
11			* License as published by the Free Software Foundation; either
12			* version 2.1 of the License, or (at your option) any later version.
13			*
14			* FFmpeg is distributed in the hope that it will be useful,
15			* but WITHOUT ANY WARRANTY; without even the implied warranty of
16			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17			* Lesser General Public License for more details.
18			*
19			* You should have received a copy of the GNU Lesser General Public
20			* License along with FFmpeg; if not, write to the Free Software
21			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22			*/
23
24			/**
25			* @file
26			* Binary text decoder
27			* eXtended BINary text (XBIN) decoder
28			* iCEDraw File decoder
29			*/
30
31			#include "libavutil/intreadwrite.h"
32			#include "libavutil/xga_font_data.h"
33			#include "avcodec.h"
34			#include "cga_data.h"
35			#include "bintext.h"
36			#include "internal.h"
37
38			#define FONT_WIDTH 8
39
40			typedef struct XbinContext {
41			AVFrame *frame;
42			int palette[16];
43			int flags;
44			int font_height;
45			const uint8_t *font;
46			int x, y;
47			} XbinContext;
48
49			static av_cold int decode_init(AVCodecContext *avctx)
50			{
51			XbinContext *s = avctx->priv_data;
52			uint8_t *p;
53			int i;
54
55			avctx->pix_fmt = AV_PIX_FMT_PAL8;
56			p = avctx->extradata;
57			if (p) {
58			s->font_height = p[0];
59			s->flags = p[1];
60			p += 2;
61			if(avctx->extradata_size < 2 + (!!(s->flags & BINTEXT_PALETTE))316
62			+ (!!(s->flags & BINTEXT_FONT))s->font_height256) {
63			av_log(avctx, AV_LOG_ERROR, "not enough extradata\n");
64			return AVERROR_INVALIDDATA;
65			}
66			if (!s->font_height) {
67			av_log(avctx, AV_LOG_ERROR, "invalid font height\n");
68			return AVERROR_INVALIDDATA;
69			}
70			} else {
71			s->font_height = 8;
72			s->flags = 0;
73			}
74
75			if ((s->flags & BINTEXT_PALETTE)) {
76			for (i = 0; i < 16; i++) {
77			s->palette[i] = 0xFF000000 \| (AV_RB24(p) << 2) \| ((AV_RB24(p) >> 4) & 0x30303);
78			p += 3;
79			}
80			} else {
81			for (i = 0; i < 16; i++)
82			s->palette[i] = 0xFF000000 \| ff_cga_palette[i];
83			}
84
85			if ((s->flags & BINTEXT_FONT)) {
86			s->font = p;
87			} else {
88			switch(s->font_height) {
89			default:
90			av_log(avctx, AV_LOG_WARNING, "font height %i not supported\n", s->font_height);
91			s->font_height = 8;
92			case 8:
93			s->font = avpriv_cga_font;
94			break;
95			case 16:
96			s->font = avpriv_vga16_font;
97			break;
98			}
99			}
100			if (avctx->width < FONT_WIDTH \|\| avctx->height < s->font_height) {
101			av_log(avctx, AV_LOG_ERROR, "Resolution too small for font.\n");
102			return AVERROR_INVALIDDATA;
103			}
104
105			return 0;
106			}
107
108			#define DEFAULT_BG_COLOR 0
109			av_unused static void hscroll(AVCodecContext *avctx)
110			{
111			XbinContext *s = avctx->priv_data;
112			if (s->y < avctx->height - s->font_height) {
113			s->y += s->font_height;
114			} else {
115			memmove(s->frame->data[0], s->frame->data[0] + s->font_height*s->frame->linesize[0],
116			(avctx->height - s->font_height)*s->frame->linesize[0]);
117			memset(s->frame->data[0] + (avctx->height - s->font_height)*s->frame->linesize[0],
118			DEFAULT_BG_COLOR, s->font_height * s->frame->linesize[0]);
119			}
120			}
121
122			/**
123			* Draw character to screen
124			*/
125			static void draw_char(AVCodecContext *avctx, int c, int a)
126			{
127			XbinContext *s = avctx->priv_data;
128			if (s->y > avctx->height - s->font_height)
129			return;
130			ff_draw_pc_font(s->frame->data[0] + s->y * s->frame->linesize[0] + s->x,
131			s->frame->linesize[0], s->font, s->font_height, c,
132			a & 0x0F, a >> 4);
133			s->x += FONT_WIDTH;
134			if (s->x > avctx->width - FONT_WIDTH) {
135			s->x = 0;
136			s->y += s->font_height;
137			}
138			}
139
140			static int decode_frame(AVCodecContext *avctx,
141			void data, int got_frame,
142			AVPacket *avpkt)
143			{
144			XbinContext *s = avctx->priv_data;
145			const uint8_t *buf = avpkt->data;
146			int buf_size = avpkt->size;
147			const uint8_t *buf_end = buf+buf_size;
148			int ret;
149
150			if ((avctx->width / FONT_WIDTH) * (avctx->height / s->font_height) / 256 > buf_size)
151			return AVERROR_INVALIDDATA;
152
153			s->frame = data;
154			s->x = s->y = 0;
155			if ((ret = ff_get_buffer(avctx, s->frame, 0)) < 0)
156			return ret;
157			s->frame->pict_type = AV_PICTURE_TYPE_I;
158			s->frame->palette_has_changed = 1;
159			memcpy(s->frame->data[1], s->palette, 16 * 4);
160
161			if (avctx->codec_id == AV_CODEC_ID_XBIN) {
162			while (buf + 2 < buf_end) {
163			int i,c,a;
164			int type = *buf >> 6;
165			int count = (*buf & 0x3F) + 1;
166			buf++;
167			switch (type) {
168			case 0: //no compression
169			for (i = 0; i < count && buf + 1 < buf_end; i++) {
170			draw_char(avctx, buf[0], buf[1]);
171			buf += 2;
172			}
173			break;
174			case 1: //character compression
175			c = *buf++;
176			for (i = 0; i < count && buf < buf_end; i++)
177			draw_char(avctx, c, *buf++);
178			break;
179			case 2: //attribute compression
180			a = *buf++;
181			for (i = 0; i < count && buf < buf_end; i++)
182			draw_char(avctx, *buf++, a);
183			break;
184			case 3: //character/attribute compression
185			c = *buf++;
186			a = *buf++;
187			for (i = 0; i < count && buf < buf_end; i++)
188			draw_char(avctx, c, a);
189			break;
190			}
191			}
192			} else if (avctx->codec_id == AV_CODEC_ID_IDF) {
193			while (buf + 2 < buf_end) {
194			if (AV_RL16(buf) == 1) {
195			int i;
196			if (buf + 6 > buf_end)
197			break;
198			for (i = 0; i < buf[2]; i++)
199			draw_char(avctx, buf[4], buf[5]);
200			buf += 6;
201			} else {
202			draw_char(avctx, buf[0], buf[1]);
203			buf += 2;
204			}
205			}
206			} else {
207			while (buf + 1 < buf_end) {
208			draw_char(avctx, buf[0], buf[1]);
209			buf += 2;
210			}
211			}
212
213			*got_frame = 1;
214			return buf_size;
215			}
216
217			#if CONFIG_BINTEXT_DECODER
218			AVCodec ff_bintext_decoder = {
219			.name = "bintext",
220			.long_name = NULL_IF_CONFIG_SMALL("Binary text"),
221			.type = AVMEDIA_TYPE_VIDEO,
222			.id = AV_CODEC_ID_BINTEXT,
223			.priv_data_size = sizeof(XbinContext),
224			.init = decode_init,
225			.decode = decode_frame,
226			.capabilities = AV_CODEC_CAP_DR1,
227			};
228			#endif
229			#if CONFIG_XBIN_DECODER
230			AVCodec ff_xbin_decoder = {
231			.name = "xbin",
232			.long_name = NULL_IF_CONFIG_SMALL("eXtended BINary text"),
233			.type = AVMEDIA_TYPE_VIDEO,
234			.id = AV_CODEC_ID_XBIN,
235			.priv_data_size = sizeof(XbinContext),
236			.init = decode_init,
237			.decode = decode_frame,
238			.capabilities = AV_CODEC_CAP_DR1,
239			};
240			#endif
241			#if CONFIG_IDF_DECODER
242			AVCodec ff_idf_decoder = {
243			.name = "idf",
244			.long_name = NULL_IF_CONFIG_SMALL("iCEDraw text"),
245			.type = AVMEDIA_TYPE_VIDEO,
246			.id = AV_CODEC_ID_IDF,
247			.priv_data_size = sizeof(XbinContext),
248			.init = decode_init,
249			.decode = decode_frame,
250			.capabilities = AV_CODEC_CAP_DR1,
251			};
252			#endif