FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/mscc.c	Lines:	0	143	0.0 %
Date:	2021-04-18 21:26:34	Branches:	0	68	0.0 %


/*
 * Mandsoft Screen Capture Codec decoder
 *
 * Copyright (c) 2017 Paul B Mahol
 *
 * 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 <stdio.h>
#include <stdlib.h>
#include <string.h>

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

#include <zlib.h>

typedef struct MSCCContext {
    unsigned          bpp;
    unsigned int      decomp_size;
    uint8_t          *decomp_buf;
    unsigned int      uncomp_size;
    uint8_t          *uncomp_buf;
    z_stream          zstream;

    uint32_t          pal[256];
} MSCCContext;

static int rle_uncompress(AVCodecContext *avctx, GetByteContext *gb, PutByteContext *pb)
{
    MSCCContext *s = avctx->priv_data;
    unsigned x = 0, y = 0;

    while (bytestream2_get_bytes_left(gb) > 0) {
        uint32_t fill;
        int j;
        unsigned run = bytestream2_get_byte(gb);

        if (run) {
            switch (avctx->bits_per_coded_sample) {
            case 8:
                fill = bytestream2_get_byte(gb);
                break;
            case 16:
                fill = bytestream2_get_le16(gb);
                break;
            case 24:
                fill = bytestream2_get_le24(gb);
                break;
            case 32:
                fill = bytestream2_get_le32(gb);
                break;
            }

            for (j = 0; j < run; j++) {
                switch (avctx->bits_per_coded_sample) {
                case 8:
                    bytestream2_put_byte(pb, fill);
                    break;
                case 16:
                    bytestream2_put_le16(pb, fill);
                    break;
                case 24:
                    bytestream2_put_le24(pb, fill);
                    break;
                case 32:
                    bytestream2_put_le32(pb, fill);
                    break;
                }
            }
            x += run;
        } else {
            unsigned copy = bytestream2_get_byte(gb);

            if (copy == 0) {
                x = 0;
                y++;
                bytestream2_seek_p(pb, y * avctx->width * s->bpp, SEEK_SET);
            } else if (copy == 1) {
                return 0;
            } else if (copy == 2) {

                x += bytestream2_get_byte(gb);
                y += bytestream2_get_byte(gb);

                bytestream2_seek_p(pb, y * avctx->width * s->bpp + x * s->bpp, SEEK_SET);
            } else {
                for (j = 0; j < copy; j++) {
                    switch (avctx->bits_per_coded_sample) {
                    case 8:
                        bytestream2_put_byte(pb, bytestream2_get_byte(gb));
                        break;
                    case 16:
                        bytestream2_put_le16(pb, bytestream2_get_le16(gb));
                        break;
                    case 24:
                        bytestream2_put_le24(pb, bytestream2_get_le24(gb));
                        break;
                    case 32:
                        bytestream2_put_le32(pb, bytestream2_get_le32(gb));
                        break;
                    }
                }

                if (s->bpp == 1 && (copy & 1))
                    bytestream2_skip(gb, 1);
                x += copy;
            }
        }
    }

    return AVERROR_INVALIDDATA;
}

static int decode_frame(AVCodecContext *avctx,
                        void *data, int *got_frame,
                        AVPacket *avpkt)
{
    MSCCContext *s = avctx->priv_data;
    AVFrame *frame = data;
    uint8_t *buf = avpkt->data;
    int buf_size = avpkt->size;
    GetByteContext gb;
    PutByteContext pb;
    int ret, j;

    if (avpkt->size < 3)
        return buf_size;

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

    if (avctx->codec_id == AV_CODEC_ID_MSCC) {
        avpkt->data[2] ^= avpkt->data[0];
        buf += 2;
        buf_size -= 2;
    }

    if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
        buffer_size_t 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;
            for (j = 0; j < 256; j++)
                s->pal[j] = 0xFF000000 | AV_RL32(pal + j * 4);
        } else if (pal) {
            av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
        }
        memcpy(frame->data[1], s->pal, AVPALETTE_SIZE);
    }

    ret = inflateReset(&s->zstream);
    if (ret != Z_OK) {
        av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", ret);
        return AVERROR_UNKNOWN;
    }
    s->zstream.next_in   = buf;
    s->zstream.avail_in  = buf_size;
    s->zstream.next_out  = s->decomp_buf;
    s->zstream.avail_out = s->decomp_size;
    ret = inflate(&s->zstream, Z_FINISH);
    if (ret != Z_STREAM_END) {
        av_log(avctx, AV_LOG_ERROR, "Inflate error: %d\n", ret);
        return AVERROR_UNKNOWN;
    }

    bytestream2_init(&gb, s->decomp_buf, s->zstream.total_out);
    bytestream2_init_writer(&pb, s->uncomp_buf, s->uncomp_size);

    ret = rle_uncompress(avctx, &gb, &pb);
    if (ret)
        return ret;

    for (j = 0; j < avctx->height; j++) {
        memcpy(frame->data[0] + (avctx->height - j - 1) * frame->linesize[0],
               s->uncomp_buf + s->bpp * j * avctx->width, s->bpp * avctx->width);
    }

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

    *got_frame = 1;

    return avpkt->size;
}

static av_cold int decode_init(AVCodecContext *avctx)
{
    MSCCContext *s = avctx->priv_data;
    int stride, zret;

    switch (avctx->bits_per_coded_sample) {
    case  8: avctx->pix_fmt = AV_PIX_FMT_PAL8;   break;
    case 16: avctx->pix_fmt = AV_PIX_FMT_RGB555; break;
    case 24: avctx->pix_fmt = AV_PIX_FMT_BGR24;  break;
    case 32: avctx->pix_fmt = AV_PIX_FMT_BGRA;   break;
    default:
        av_log(avctx, AV_LOG_ERROR, "Unsupported bitdepth %i\n", avctx->bits_per_coded_sample);
        return AVERROR_INVALIDDATA;
    }

    s->bpp = avctx->bits_per_coded_sample >> 3;
    stride = 4 * ((avctx->width * avctx->bits_per_coded_sample + 31) / 32);

    s->decomp_size = 2 * avctx->height * stride;
    if (!(s->decomp_buf = av_malloc(s->decomp_size)))
        return AVERROR(ENOMEM);

    s->uncomp_size = avctx->height * stride;
    if (!(s->uncomp_buf = av_malloc(s->uncomp_size)))
        return AVERROR(ENOMEM);

    s->zstream.zalloc = Z_NULL;
    s->zstream.zfree = Z_NULL;
    s->zstream.opaque = Z_NULL;
    zret = inflateInit(&s->zstream);
    if (zret != Z_OK) {
        av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
        return AVERROR_UNKNOWN;
    }

    return 0;
}

static av_cold int decode_close(AVCodecContext *avctx)
{
    MSCCContext *s = avctx->priv_data;

    av_freep(&s->decomp_buf);
    s->decomp_size = 0;
    av_freep(&s->uncomp_buf);
    s->uncomp_size = 0;
    inflateEnd(&s->zstream);

    return 0;
}

AVCodec ff_mscc_decoder = {
    .name             = "mscc",
    .long_name        = NULL_IF_CONFIG_SMALL("Mandsoft Screen Capture Codec"),
    .type             = AVMEDIA_TYPE_VIDEO,
    .id               = AV_CODEC_ID_MSCC,
    .priv_data_size   = sizeof(MSCCContext),
    .init             = decode_init,
    .close            = decode_close,
    .decode           = decode_frame,
    .capabilities     = AV_CODEC_CAP_DR1,
    .caps_internal    = FF_CODEC_CAP_INIT_CLEANUP,
};

AVCodec ff_srgc_decoder = {
    .name             = "srgc",
    .long_name        = NULL_IF_CONFIG_SMALL("Screen Recorder Gold Codec"),
    .type             = AVMEDIA_TYPE_VIDEO,
    .id               = AV_CODEC_ID_SRGC,
    .priv_data_size   = sizeof(MSCCContext),
    .init             = decode_init,
    .close            = decode_close,
    .decode           = decode_frame,
    .capabilities     = AV_CODEC_CAP_DR1,
    .caps_internal    = FF_CODEC_CAP_INIT_CLEANUP,
};


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* Mandsoft Screen Capture Codec decoder
3			*
4			* Copyright (c) 2017 Paul B Mahol
5			*
6			* This file is part of FFmpeg.
7			*
8			* FFmpeg is free software; you can redistribute it and/or
9			* modify it under the terms of the GNU Lesser General Public
10			* License as published by the Free Software Foundation; either
11			* version 2.1 of the License, or (at your option) any later version.
12			*
13			* FFmpeg is distributed in the hope that it will be useful,
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16			* Lesser General Public License for more details.
17			*
18			* You should have received a copy of the GNU Lesser General Public
19			* License along with FFmpeg; if not, write to the Free Software
20			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21			*/
22
23			#include <stdio.h>
24			#include <stdlib.h>
25			#include <string.h>
26
27			#include "avcodec.h"
28			#include "bytestream.h"
29			#include "internal.h"
30
31			#include <zlib.h>
32
33			typedef struct MSCCContext {
34			unsigned bpp;
35			unsigned int decomp_size;
36			uint8_t *decomp_buf;
37			unsigned int uncomp_size;
38			uint8_t *uncomp_buf;
39			z_stream zstream;
40
41			uint32_t pal[256];
42			} MSCCContext;
43
44			static int rle_uncompress(AVCodecContext avctx, GetByteContext gb, PutByteContext *pb)
45			{
46			MSCCContext *s = avctx->priv_data;
47			unsigned x = 0, y = 0;
48
49			while (bytestream2_get_bytes_left(gb) > 0) {
50			uint32_t fill;
51			int j;
52			unsigned run = bytestream2_get_byte(gb);
53
54			if (run) {
55			switch (avctx->bits_per_coded_sample) {
56			case 8:
57			fill = bytestream2_get_byte(gb);
58			break;
59			case 16:
60			fill = bytestream2_get_le16(gb);
61			break;
62			case 24:
63			fill = bytestream2_get_le24(gb);
64			break;
65			case 32:
66			fill = bytestream2_get_le32(gb);
67			break;
68			}
69
70			for (j = 0; j < run; j++) {
71			switch (avctx->bits_per_coded_sample) {
72			case 8:
73			bytestream2_put_byte(pb, fill);
74			break;
75			case 16:
76			bytestream2_put_le16(pb, fill);
77			break;
78			case 24:
79			bytestream2_put_le24(pb, fill);
80			break;
81			case 32:
82			bytestream2_put_le32(pb, fill);
83			break;
84			}
85			}
86			x += run;
87			} else {
88			unsigned copy = bytestream2_get_byte(gb);
89
90			if (copy == 0) {
91			x = 0;
92			y++;
93			bytestream2_seek_p(pb, y * avctx->width * s->bpp, SEEK_SET);
94			} else if (copy == 1) {
95			return 0;
96			} else if (copy == 2) {
97
98			x += bytestream2_get_byte(gb);
99			y += bytestream2_get_byte(gb);
100
101			bytestream2_seek_p(pb, y * avctx->width * s->bpp + x * s->bpp, SEEK_SET);
102			} else {
103			for (j = 0; j < copy; j++) {
104			switch (avctx->bits_per_coded_sample) {
105			case 8:
106			bytestream2_put_byte(pb, bytestream2_get_byte(gb));
107			break;
108			case 16:
109			bytestream2_put_le16(pb, bytestream2_get_le16(gb));
110			break;
111			case 24:
112			bytestream2_put_le24(pb, bytestream2_get_le24(gb));
113			break;
114			case 32:
115			bytestream2_put_le32(pb, bytestream2_get_le32(gb));
116			break;
117			}
118			}
119
120			if (s->bpp == 1 && (copy & 1))
121			bytestream2_skip(gb, 1);
122			x += copy;
123			}
124			}
125			}
126
127			return AVERROR_INVALIDDATA;
128			}
129
130			static int decode_frame(AVCodecContext *avctx,
131			void data, int got_frame,
132			AVPacket *avpkt)
133			{
134			MSCCContext *s = avctx->priv_data;
135			AVFrame *frame = data;
136			uint8_t *buf = avpkt->data;
137			int buf_size = avpkt->size;
138			GetByteContext gb;
139			PutByteContext pb;
140			int ret, j;
141
142			if (avpkt->size < 3)
143			return buf_size;
144
145			if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
146			return ret;
147
148			if (avctx->codec_id == AV_CODEC_ID_MSCC) {
149			avpkt->data[2] ^= avpkt->data[0];
150			buf += 2;
151			buf_size -= 2;
152			}
153
154			if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
155			buffer_size_t size;
156			const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &size);
157
158			if (pal && size == AVPALETTE_SIZE) {
159			frame->palette_has_changed = 1;
160			for (j = 0; j < 256; j++)
161			s->pal[j] = 0xFF000000 \| AV_RL32(pal + j * 4);
162			} else if (pal) {
163			av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
164			}
165			memcpy(frame->data[1], s->pal, AVPALETTE_SIZE);
166			}
167
168			ret = inflateReset(&s->zstream);
169			if (ret != Z_OK) {
170			av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", ret);
171			return AVERROR_UNKNOWN;
172			}
173			s->zstream.next_in = buf;
174			s->zstream.avail_in = buf_size;
175			s->zstream.next_out = s->decomp_buf;
176			s->zstream.avail_out = s->decomp_size;
177			ret = inflate(&s->zstream, Z_FINISH);
178			if (ret != Z_STREAM_END) {
179			av_log(avctx, AV_LOG_ERROR, "Inflate error: %d\n", ret);
180			return AVERROR_UNKNOWN;
181			}
182
183			bytestream2_init(&gb, s->decomp_buf, s->zstream.total_out);
184			bytestream2_init_writer(&pb, s->uncomp_buf, s->uncomp_size);
185
186			ret = rle_uncompress(avctx, &gb, &pb);
187			if (ret)
188			return ret;
189
190			for (j = 0; j < avctx->height; j++) {
191			memcpy(frame->data[0] + (avctx->height - j - 1) * frame->linesize[0],
192			s->uncomp_buf + s->bpp * j * avctx->width, s->bpp * avctx->width);
193			}
194
195			frame->key_frame = 1;
196			frame->pict_type = AV_PICTURE_TYPE_I;
197
198			*got_frame = 1;
199
200			return avpkt->size;
201			}
202
203			static av_cold int decode_init(AVCodecContext *avctx)
204			{
205			MSCCContext *s = avctx->priv_data;
206			int stride, zret;
207
208			switch (avctx->bits_per_coded_sample) {
209			case 8: avctx->pix_fmt = AV_PIX_FMT_PAL8; break;
210			case 16: avctx->pix_fmt = AV_PIX_FMT_RGB555; break;
211			case 24: avctx->pix_fmt = AV_PIX_FMT_BGR24; break;
212			case 32: avctx->pix_fmt = AV_PIX_FMT_BGRA; break;
213			default:
214			av_log(avctx, AV_LOG_ERROR, "Unsupported bitdepth %i\n", avctx->bits_per_coded_sample);
215			return AVERROR_INVALIDDATA;
216			}
217
218			s->bpp = avctx->bits_per_coded_sample >> 3;
219			stride = 4 * ((avctx->width * avctx->bits_per_coded_sample + 31) / 32);
220
221			s->decomp_size = 2 * avctx->height * stride;
222			if (!(s->decomp_buf = av_malloc(s->decomp_size)))
223			return AVERROR(ENOMEM);
224
225			s->uncomp_size = avctx->height * stride;
226			if (!(s->uncomp_buf = av_malloc(s->uncomp_size)))
227			return AVERROR(ENOMEM);
228
229			s->zstream.zalloc = Z_NULL;
230			s->zstream.zfree = Z_NULL;
231			s->zstream.opaque = Z_NULL;
232			zret = inflateInit(&s->zstream);
233			if (zret != Z_OK) {
234			av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
235			return AVERROR_UNKNOWN;
236			}
237
238			return 0;
239			}
240
241			static av_cold int decode_close(AVCodecContext *avctx)
242			{
243			MSCCContext *s = avctx->priv_data;
244
245			av_freep(&s->decomp_buf);
246			s->decomp_size = 0;
247			av_freep(&s->uncomp_buf);
248			s->uncomp_size = 0;
249			inflateEnd(&s->zstream);
250
251			return 0;
252			}
253
254			AVCodec ff_mscc_decoder = {
255			.name = "mscc",
256			.long_name = NULL_IF_CONFIG_SMALL("Mandsoft Screen Capture Codec"),
257			.type = AVMEDIA_TYPE_VIDEO,
258			.id = AV_CODEC_ID_MSCC,
259			.priv_data_size = sizeof(MSCCContext),
260			.init = decode_init,
261			.close = decode_close,
262			.decode = decode_frame,
263			.capabilities = AV_CODEC_CAP_DR1,
264			.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
265			};
266
267			AVCodec ff_srgc_decoder = {
268			.name = "srgc",
269			.long_name = NULL_IF_CONFIG_SMALL("Screen Recorder Gold Codec"),
270			.type = AVMEDIA_TYPE_VIDEO,
271			.id = AV_CODEC_ID_SRGC,
272			.priv_data_size = sizeof(MSCCContext),
273			.init = decode_init,
274			.close = decode_close,
275			.decode = decode_frame,
276			.capabilities = AV_CODEC_CAP_DR1,
277			.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
278			};