FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/roqvideodec.c	Lines:	133	143	93.0 %
Date:	2020-08-14 10:39:37	Branches:	61	74	82.4 %


/*
 * Copyright (C) 2003 The FFmpeg project
 *
 * 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
 * id RoQ Video Decoder by Dr. Tim Ferguson
 * For more information about the id RoQ format, visit:
 *   http://www.csse.monash.edu.au/~timf/
 */

#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"

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

static void roqvideo_decode_frame(RoqContext *ri)
{
    unsigned int chunk_id = 0, chunk_arg = 0;
    unsigned long chunk_size = 0;
    int i, j, k, nv1, nv2, vqflg = 0, vqflg_pos = -1;
    int vqid, xpos, ypos, xp, yp, x, y, mx, my;
    int frame_stats[2][4] = {{0},{0}};
    roq_qcell *qcell;
    int64_t chunk_start;

    while (bytestream2_get_bytes_left(&ri->gb) >= 8) {
        chunk_id   = bytestream2_get_le16(&ri->gb);
        chunk_size = bytestream2_get_le32(&ri->gb);
        chunk_arg  = bytestream2_get_le16(&ri->gb);

        if(chunk_id == RoQ_QUAD_VQ)
            break;
        if(chunk_id == RoQ_QUAD_CODEBOOK) {
            if((nv1 = chunk_arg >> 8) == 0)
                nv1 = 256;
            if((nv2 = chunk_arg & 0xff) == 0 && nv1 * 6 < chunk_size)
                nv2 = 256;
            for(i = 0; i < nv1; i++) {
                ri->cb2x2[i].y[0] = bytestream2_get_byte(&ri->gb);
                ri->cb2x2[i].y[1] = bytestream2_get_byte(&ri->gb);
                ri->cb2x2[i].y[2] = bytestream2_get_byte(&ri->gb);
                ri->cb2x2[i].y[3] = bytestream2_get_byte(&ri->gb);
                ri->cb2x2[i].u    = bytestream2_get_byte(&ri->gb);
                ri->cb2x2[i].v    = bytestream2_get_byte(&ri->gb);
            }
            for(i = 0; i < nv2; i++)
                for(j = 0; j < 4; j++)
                    ri->cb4x4[i].idx[j] = bytestream2_get_byte(&ri->gb);
        }
    }

    chunk_start = bytestream2_tell(&ri->gb);
    xpos = ypos = 0;

    if (chunk_size > bytestream2_get_bytes_left(&ri->gb)) {
        av_log(ri->avctx, AV_LOG_ERROR, "Chunk does not fit in input buffer\n");
        chunk_size = bytestream2_get_bytes_left(&ri->gb);
    }

    while (bytestream2_tell(&ri->gb) < chunk_start + chunk_size) {
        for (yp = ypos; yp < ypos + 16; yp += 8)
            for (xp = xpos; xp < xpos + 16; xp += 8) {
                if (bytestream2_tell(&ri->gb) >= chunk_start + chunk_size) {
                    av_log(ri->avctx, AV_LOG_VERBOSE, "Chunk is too short\n");
                    return;
                }
                if (vqflg_pos < 0) {
                    vqflg = bytestream2_get_le16(&ri->gb);
                    vqflg_pos = 7;
                }
                vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
                frame_stats[0][vqid]++;
                vqflg_pos--;

                switch(vqid) {
                case RoQ_ID_MOT:
                    break;
                case RoQ_ID_FCC: {
                    int byte = bytestream2_get_byte(&ri->gb);
                    mx = 8 - (byte >> 4) - ((signed char) (chunk_arg >> 8));
                    my = 8 - (byte & 0xf) - ((signed char) chunk_arg);
                    ff_apply_motion_8x8(ri, xp, yp, mx, my);
                    break;
                }
                case RoQ_ID_SLD:
                    qcell = ri->cb4x4 + bytestream2_get_byte(&ri->gb);
                    ff_apply_vector_4x4(ri, xp,     yp,     ri->cb2x2 + qcell->idx[0]);
                    ff_apply_vector_4x4(ri, xp + 4, yp,     ri->cb2x2 + qcell->idx[1]);
                    ff_apply_vector_4x4(ri, xp,     yp + 4, ri->cb2x2 + qcell->idx[2]);
                    ff_apply_vector_4x4(ri, xp + 4, yp + 4, ri->cb2x2 + qcell->idx[3]);
                    break;
                case RoQ_ID_CCC:
                    for (k = 0; k < 4; k++) {
                        x = xp; y = yp;
                        if(k & 0x01) x += 4;
                        if(k & 0x02) y += 4;

                        if (bytestream2_tell(&ri->gb) >= chunk_start + chunk_size) {
                            av_log(ri->avctx, AV_LOG_VERBOSE, "Chunk is too short\n");
                            return;
                        }
                        if (vqflg_pos < 0) {
                            vqflg = bytestream2_get_le16(&ri->gb);
                            vqflg_pos = 7;
                        }
                        vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
                        frame_stats[1][vqid]++;
                        vqflg_pos--;
                        switch(vqid) {
                        case RoQ_ID_MOT:
                            break;
                        case RoQ_ID_FCC: {
                            int byte = bytestream2_get_byte(&ri->gb);
                            mx = 8 - (byte >> 4) - ((signed char) (chunk_arg >> 8));
                            my = 8 - (byte & 0xf) - ((signed char) chunk_arg);
                            ff_apply_motion_4x4(ri, x, y, mx, my);
                            break;
                        }
                        case RoQ_ID_SLD:
                            qcell = ri->cb4x4 + bytestream2_get_byte(&ri->gb);
                            ff_apply_vector_2x2(ri, x,     y,     ri->cb2x2 + qcell->idx[0]);
                            ff_apply_vector_2x2(ri, x + 2, y,     ri->cb2x2 + qcell->idx[1]);
                            ff_apply_vector_2x2(ri, x,     y + 2, ri->cb2x2 + qcell->idx[2]);
                            ff_apply_vector_2x2(ri, x + 2, y + 2, ri->cb2x2 + qcell->idx[3]);
                            break;
                        case RoQ_ID_CCC:
                            ff_apply_vector_2x2(ri, x,     y,     ri->cb2x2 + bytestream2_get_byte(&ri->gb));
                            ff_apply_vector_2x2(ri, x + 2, y,     ri->cb2x2 + bytestream2_get_byte(&ri->gb));
                            ff_apply_vector_2x2(ri, x,     y + 2, ri->cb2x2 + bytestream2_get_byte(&ri->gb));
                            ff_apply_vector_2x2(ri, x + 2, y + 2, ri->cb2x2 + bytestream2_get_byte(&ri->gb));
                            break;
                        }
                    }
                    break;
                default:
                    av_assert2(0);
            }
        }

        xpos += 16;
        if (xpos >= ri->width) {
            xpos -= ri->width;
            ypos += 16;
        }
        if(ypos >= ri->height)
            break;
    }
}


static av_cold int roq_decode_init(AVCodecContext *avctx)
{
    RoqContext *s = avctx->priv_data;

    s->avctx = avctx;

    if (avctx->width % 16 || avctx->height % 16) {
        avpriv_request_sample(avctx, "Dimensions not being a multiple of 16");
        return AVERROR_PATCHWELCOME;
    }

    s->width = avctx->width;
    s->height = avctx->height;

    s->last_frame    = av_frame_alloc();
    s->current_frame = av_frame_alloc();
    if (!s->current_frame || !s->last_frame) {
        av_frame_free(&s->current_frame);
        av_frame_free(&s->last_frame);
        return AVERROR(ENOMEM);
    }

    avctx->pix_fmt = AV_PIX_FMT_YUVJ444P;
    avctx->color_range = AVCOL_RANGE_JPEG;

    return 0;
}

static int roq_decode_frame(AVCodecContext *avctx,
                            void *data, int *got_frame,
                            AVPacket *avpkt)
{
    const uint8_t *buf = avpkt->data;
    int buf_size = avpkt->size;
    RoqContext *s = avctx->priv_data;
    int copy = !s->current_frame->data[0] && s->last_frame->data[0];
    int ret;

    if ((ret = ff_reget_buffer(avctx, s->current_frame, 0)) < 0)
        return ret;

    if (copy) {
        ret = av_frame_copy(s->current_frame, s->last_frame);
        if (ret < 0)
            return ret;
    }

    bytestream2_init(&s->gb, buf, buf_size);
    roqvideo_decode_frame(s);

    if ((ret = av_frame_ref(data, s->current_frame)) < 0)
        return ret;
    *got_frame      = 1;

    /* shuffle frames */
    FFSWAP(AVFrame *, s->current_frame, s->last_frame);

    return buf_size;
}

static av_cold int roq_decode_end(AVCodecContext *avctx)
{
    RoqContext *s = avctx->priv_data;

    av_frame_free(&s->current_frame);
    av_frame_free(&s->last_frame);

    return 0;
}

AVCodec ff_roq_decoder = {
    .name           = "roqvideo",
    .long_name      = NULL_IF_CONFIG_SMALL("id RoQ video"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_ROQ,
    .priv_data_size = sizeof(RoqContext),
    .init           = roq_decode_init,
    .close          = roq_decode_end,
    .decode         = roq_decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1,
};


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* Copyright (C) 2003 The FFmpeg project
3			*
4			* This file is part of FFmpeg.
5			*
6			* FFmpeg is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU Lesser General Public
8			* License as published by the Free Software Foundation; either
9			* version 2.1 of the License, or (at your option) any later version.
10			*
11			* FFmpeg is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14			* Lesser General Public License for more details.
15			*
16			* You should have received a copy of the GNU Lesser General Public
17			* License along with FFmpeg; if not, write to the Free Software
18			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19			*/
20
21			/**
22			* @file
23			* id RoQ Video Decoder by Dr. Tim Ferguson
24			* For more information about the id RoQ format, visit:
25			* http://www.csse.monash.edu.au/~timf/
26			*/
27
28			#include "libavutil/avassert.h"
29			#include "libavutil/imgutils.h"
30
31			#include "avcodec.h"
32			#include "bytestream.h"
33			#include "internal.h"
34			#include "roqvideo.h"
35
36		225	static void roqvideo_decode_frame(RoqContext *ri)
37			{
38		225	unsigned int chunk_id = 0, chunk_arg = 0;
39		225	unsigned long chunk_size = 0;
40		225	int i, j, k, nv1, nv2, vqflg = 0, vqflg_pos = -1;
41			int vqid, xpos, ypos, xp, yp, x, y, mx, my;
42		225	int frame_stats[2][4] = {{0},{0}};
43			roq_qcell *qcell;
44			int64_t chunk_start;
45
46	✓✗	428	while (bytestream2_get_bytes_left(&ri->gb) >= 8) {
47		428	chunk_id = bytestream2_get_le16(&ri->gb);
48		428	chunk_size = bytestream2_get_le32(&ri->gb);
49		428	chunk_arg = bytestream2_get_le16(&ri->gb);
50
51	✓✓	428	if(chunk_id == RoQ_QUAD_VQ)
52		225	break;
53	✓✗	203	if(chunk_id == RoQ_QUAD_CODEBOOK) {
54	✓✓	203	if((nv1 = chunk_arg >> 8) == 0)
55		67	nv1 = 256;
56	✓✓✓✓	203	if((nv2 = chunk_arg & 0xff) == 0 && nv1 * 6 < chunk_size)
57		1	nv2 = 256;
58	✓✓	51102	for(i = 0; i < nv1; i++) {
59		50899	ri->cb2x2[i].y[0] = bytestream2_get_byte(&ri->gb);
60		50899	ri->cb2x2[i].y[1] = bytestream2_get_byte(&ri->gb);
61		50899	ri->cb2x2[i].y[2] = bytestream2_get_byte(&ri->gb);
62		50899	ri->cb2x2[i].y[3] = bytestream2_get_byte(&ri->gb);
63		50899	ri->cb2x2[i].u = bytestream2_get_byte(&ri->gb);
64		50899	ri->cb2x2[i].v = bytestream2_get_byte(&ri->gb);
65			}
66	✓✓	17934	for(i = 0; i < nv2; i++)
67	✓✓	88655	for(j = 0; j < 4; j++)
68		70924	ri->cb4x4[i].idx[j] = bytestream2_get_byte(&ri->gb);
69			}
70			}
71
72		225	chunk_start = bytestream2_tell(&ri->gb);
73		225	xpos = ypos = 0;
74
75	✗✓	225	if (chunk_size > bytestream2_get_bytes_left(&ri->gb)) {
76			av_log(ri->avctx, AV_LOG_ERROR, "Chunk does not fit in input buffer\n");
77			chunk_size = bytestream2_get_bytes_left(&ri->gb);
78			}
79
80	✓✗	113460	while (bytestream2_tell(&ri->gb) < chunk_start + chunk_size) {
81	✓✓	340342	for (yp = ypos; yp < ypos + 16; yp += 8)
82	✓✓	680707	for (xp = xpos; xp < xpos + 16; xp += 8) {
83	✓✓	453825	if (bytestream2_tell(&ri->gb) >= chunk_start + chunk_size) {
84		4	av_log(ri->avctx, AV_LOG_VERBOSE, "Chunk is too short\n");
85		34	return;
86			}
87	✓✓	453821	if (vqflg_pos < 0) {
88		56771	vqflg = bytestream2_get_le16(&ri->gb);
89		56771	vqflg_pos = 7;
90			}
91		453821	vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
92		453821	frame_stats[0][vqid]++;
93		453821	vqflg_pos--;
94
95	✓✓✓✓ ✗	453821	switch(vqid) {
96		121738	case RoQ_ID_MOT:
97		121738	break;
98		9277	case RoQ_ID_FCC: {
99		9277	int byte = bytestream2_get_byte(&ri->gb);
100		9277	mx = 8 - (byte >> 4) - ((signed char) (chunk_arg >> 8));
101		9277	my = 8 - (byte & 0xf) - ((signed char) chunk_arg);
102		9277	ff_apply_motion_8x8(ri, xp, yp, mx, my);
103		9277	break;
104			}
105		7001	case RoQ_ID_SLD:
106		7001	qcell = ri->cb4x4 + bytestream2_get_byte(&ri->gb);
107		7001	ff_apply_vector_4x4(ri, xp, yp, ri->cb2x2 + qcell->idx[0]);
108		7001	ff_apply_vector_4x4(ri, xp + 4, yp, ri->cb2x2 + qcell->idx[1]);
109		7001	ff_apply_vector_4x4(ri, xp, yp + 4, ri->cb2x2 + qcell->idx[2]);
110		7001	ff_apply_vector_4x4(ri, xp + 4, yp + 4, ri->cb2x2 + qcell->idx[3]);
111		7001	break;
112		315805	case RoQ_ID_CCC:
113	✓✓	1578984	for (k = 0; k < 4; k++) {
114		1263209	x = xp; y = yp;
115	✓✓	1263209	if(k & 0x01) x += 4;
116	✓✓	1263209	if(k & 0x02) y += 4;
117
118	✓✓	1263209	if (bytestream2_tell(&ri->gb) >= chunk_start + chunk_size) {
119		30	av_log(ri->avctx, AV_LOG_VERBOSE, "Chunk is too short\n");
120		30	return;
121			}
122	✓✓	1263179	if (vqflg_pos < 0) {
123		157911	vqflg = bytestream2_get_le16(&ri->gb);
124		157911	vqflg_pos = 7;
125			}
126		1263179	vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
127		1263179	frame_stats[1][vqid]++;
128	✓✓✓✓ ✗	1263179	vqflg_pos--;
129			switch(vqid) {
130		259115	case RoQ_ID_MOT:
131		259115	break;
132		521989	case RoQ_ID_FCC: {
133		521989	int byte = bytestream2_get_byte(&ri->gb);
134		521989	mx = 8 - (byte >> 4) - ((signed char) (chunk_arg >> 8));
135		521989	my = 8 - (byte & 0xf) - ((signed char) chunk_arg);
136		521989	ff_apply_motion_4x4(ri, x, y, mx, my);
137		521989	break;
138			}
139		116817	case RoQ_ID_SLD:
140		116817	qcell = ri->cb4x4 + bytestream2_get_byte(&ri->gb);
141		116817	ff_apply_vector_2x2(ri, x, y, ri->cb2x2 + qcell->idx[0]);
142		116817	ff_apply_vector_2x2(ri, x + 2, y, ri->cb2x2 + qcell->idx[1]);
143		116817	ff_apply_vector_2x2(ri, x, y + 2, ri->cb2x2 + qcell->idx[2]);
144		116817	ff_apply_vector_2x2(ri, x + 2, y + 2, ri->cb2x2 + qcell->idx[3]);
145		116817	break;
146		365258	case RoQ_ID_CCC:
147		365258	ff_apply_vector_2x2(ri, x, y, ri->cb2x2 + bytestream2_get_byte(&ri->gb));
148		365258	ff_apply_vector_2x2(ri, x + 2, y, ri->cb2x2 + bytestream2_get_byte(&ri->gb));
149		365258	ff_apply_vector_2x2(ri, x, y + 2, ri->cb2x2 + bytestream2_get_byte(&ri->gb));
150		365258	ff_apply_vector_2x2(ri, x + 2, y + 2, ri->cb2x2 + bytestream2_get_byte(&ri->gb));
151		365258	break;
152			}
153		1263179	}
154		315775	break;
155		453791	default:
156			av_assert2(0);
157			}
158			}
159
160		113426	xpos += 16;
161	✓✓	113426	if (xpos >= ri->width) {
162		3596	xpos -= ri->width;
163		3596	ypos += 16;
164			}
165	✓✓	113426	if(ypos >= ri->height)
166		191	break;
167			}
168			}
169
170
171		10	static av_cold int roq_decode_init(AVCodecContext *avctx)
172			{
173		10	RoqContext *s = avctx->priv_data;
174
175		10	s->avctx = avctx;
176
177	✓✗✗✓	10	if (avctx->width % 16 \|\| avctx->height % 16) {
178			avpriv_request_sample(avctx, "Dimensions not being a multiple of 16");
179			return AVERROR_PATCHWELCOME;
180			}
181
182		10	s->width = avctx->width;
183		10	s->height = avctx->height;
184
185		10	s->last_frame = av_frame_alloc();
186		10	s->current_frame = av_frame_alloc();
187	✓✗✗✓	10	if (!s->current_frame \|\| !s->last_frame) {
188			av_frame_free(&s->current_frame);
189			av_frame_free(&s->last_frame);
190			return AVERROR(ENOMEM);
191			}
192
193		10	avctx->pix_fmt = AV_PIX_FMT_YUVJ444P;
194		10	avctx->color_range = AVCOL_RANGE_JPEG;
195
196		10	return 0;
197			}
198
199		225	static int roq_decode_frame(AVCodecContext *avctx,
200			void data, int got_frame,
201			AVPacket *avpkt)
202			{
203		225	const uint8_t *buf = avpkt->data;
204		225	int buf_size = avpkt->size;
205		225	RoqContext *s = avctx->priv_data;
206	✓✓✓✓	225	int copy = !s->current_frame->data[0] && s->last_frame->data[0];
207			int ret;
208
209	✗✓	225	if ((ret = ff_reget_buffer(avctx, s->current_frame, 0)) < 0)
210			return ret;
211
212	✓✓	225	if (copy) {
213		4	ret = av_frame_copy(s->current_frame, s->last_frame);
214	✗✓	4	if (ret < 0)
215			return ret;
216			}
217
218		225	bytestream2_init(&s->gb, buf, buf_size);
219		225	roqvideo_decode_frame(s);
220
221	✗✓	225	if ((ret = av_frame_ref(data, s->current_frame)) < 0)
222			return ret;
223		225	*got_frame = 1;
224
225			/* shuffle frames */
226		225	FFSWAP(AVFrame *, s->current_frame, s->last_frame);
227
228		225	return buf_size;
229			}
230
231		10	static av_cold int roq_decode_end(AVCodecContext *avctx)
232			{
233		10	RoqContext *s = avctx->priv_data;
234
235		10	av_frame_free(&s->current_frame);
236		10	av_frame_free(&s->last_frame);
237
238		10	return 0;
239			}
240
241			AVCodec ff_roq_decoder = {
242			.name = "roqvideo",
243			.long_name = NULL_IF_CONFIG_SMALL("id RoQ video"),
244			.type = AVMEDIA_TYPE_VIDEO,
245			.id = AV_CODEC_ID_ROQ,
246			.priv_data_size = sizeof(RoqContext),
247			.init = roq_decode_init,
248			.close = roq_decode_end,
249			.decode = roq_decode_frame,
250			.capabilities = AV_CODEC_CAP_DR1,
251			};