FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/motionpixels.c	Lines:	167	188	88.8 %
Date:	2021-04-20 15:25:36	Branches:	76	98	77.6 %


/*
 * Motion Pixels Video Decoder
 * Copyright (c) 2008 Gregory Montoir (cyx@users.sourceforge.net)
 *
 * 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 "libavutil/thread.h"

#include "config.h"

#include "avcodec.h"
#include "get_bits.h"
#include "bswapdsp.h"
#include "internal.h"

#define MAX_HUFF_CODES 16

#include "motionpixels_tablegen.h"

typedef struct HuffCode {
    uint8_t size;
    uint8_t delta;
} HuffCode;

typedef struct MotionPixelsContext {
    AVCodecContext *avctx;
    AVFrame *frame;
    BswapDSPContext bdsp;
    uint8_t *changes_map;
    int offset_bits_len;
    int codes_count, current_codes_count;
    int max_codes_bits;
    HuffCode codes[MAX_HUFF_CODES];
    VLC vlc;
    YuvPixel *vpt, *hpt;
    uint8_t gradient_scale[3];
    uint8_t *bswapbuf;
    int bswapbuf_size;
} MotionPixelsContext;

static av_cold int mp_decode_end(AVCodecContext *avctx)
{
    MotionPixelsContext *mp = avctx->priv_data;

    av_freep(&mp->changes_map);
    av_freep(&mp->vpt);
    av_freep(&mp->hpt);
    av_freep(&mp->bswapbuf);
    av_frame_free(&mp->frame);

    return 0;
}

static av_cold int mp_decode_init(AVCodecContext *avctx)
{
    av_unused static AVOnce init_static_once = AV_ONCE_INIT;
    MotionPixelsContext *mp = avctx->priv_data;
    int w4 = (avctx->width  + 3) & ~3;
    int h4 = (avctx->height + 3) & ~3;

    if(avctx->extradata_size < 2){
        av_log(avctx, AV_LOG_ERROR, "extradata too small\n");
        return AVERROR_INVALIDDATA;
    }

    mp->avctx = avctx;
    ff_bswapdsp_init(&mp->bdsp);
    mp->changes_map = av_mallocz_array(avctx->width, h4);
    mp->offset_bits_len = av_log2(avctx->width * avctx->height) + 1;
    mp->vpt = av_mallocz_array(avctx->height, sizeof(YuvPixel));
    mp->hpt = av_mallocz_array(h4 / 4, w4 / 4 * sizeof(YuvPixel));
    if (!mp->changes_map || !mp->vpt || !mp->hpt)
        return AVERROR(ENOMEM);
    avctx->pix_fmt = AV_PIX_FMT_RGB555;

    mp->frame = av_frame_alloc();
    if (!mp->frame)
        return AVERROR(ENOMEM);

#if !CONFIG_HARDCODED_TABLES
    ff_thread_once(&init_static_once, motionpixels_tableinit);
#endif

    return 0;
}

static void mp_read_changes_map(MotionPixelsContext *mp, GetBitContext *gb, int count, int bits_len, int read_color)
{
    uint16_t *pixels;
    int offset, w, h, color = 0, x, y, i;

    while (count--) {
        offset = get_bits_long(gb, mp->offset_bits_len);
        w      = get_bits(gb, bits_len) + 1;
        h      = get_bits(gb, bits_len) + 1;
        if (read_color)
            color = get_bits(gb, 15);
        x = offset % mp->avctx->width;
        y = offset / mp->avctx->width;
        if (y >= mp->avctx->height)
            continue;
        w = FFMIN(w, mp->avctx->width  - x);
        h = FFMIN(h, mp->avctx->height - y);
        pixels = (uint16_t *)&mp->frame->data[0][y * mp->frame->linesize[0] + x * 2];
        while (h--) {
            mp->changes_map[offset] = w;
            if (read_color)
                for (i = 0; i < w; ++i)
                    pixels[i] = color;
            offset += mp->avctx->width;
            pixels += mp->frame->linesize[0] / 2;
        }
    }
}

static int mp_get_code(MotionPixelsContext *mp, GetBitContext *gb, int size)
{
    while (get_bits1(gb)) {
        ++size;
        if (size > mp->max_codes_bits) {
            av_log(mp->avctx, AV_LOG_ERROR, "invalid code size %d/%d\n", size, mp->max_codes_bits);
            return AVERROR_INVALIDDATA;
        }
        if (mp_get_code(mp, gb, size) < 0)
            return AVERROR_INVALIDDATA;
    }
    if (mp->current_codes_count >= mp->codes_count) {
        av_log(mp->avctx, AV_LOG_ERROR, "too many codes\n");
        return AVERROR_INVALIDDATA;
    }

    mp->codes[mp->current_codes_count++].size = size;
    return 0;
}

static int mp_read_codes_table(MotionPixelsContext *mp, GetBitContext *gb)
{
    if (mp->codes_count == 1) {
        mp->codes[0].delta = get_bits(gb, 4);
    } else {
        int i;
        int ret;

        mp->max_codes_bits = get_bits(gb, 4);
        for (i = 0; i < mp->codes_count; ++i)
            mp->codes[i].delta = get_bits(gb, 4);
        mp->current_codes_count = 0;
        if ((ret = mp_get_code(mp, gb, 0)) < 0)
            return ret;
        if (mp->current_codes_count < mp->codes_count) {
            av_log(mp->avctx, AV_LOG_ERROR, "too few codes\n");
            return AVERROR_INVALIDDATA;
        }
   }
   return 0;
}

static av_always_inline int mp_gradient(MotionPixelsContext *mp, int component, int v)
{
    int delta;

    delta = (v - 7) * mp->gradient_scale[component];
    mp->gradient_scale[component] = (v == 0 || v == 14) ? 2 : 1;
    return delta;
}

static YuvPixel mp_get_yuv_from_rgb(MotionPixelsContext *mp, int x, int y)
{
    int color;

    color = *(uint16_t *)&mp->frame->data[0][y * mp->frame->linesize[0] + x * 2];
    return mp_rgb_yuv_table[color];
}

static void mp_set_rgb_from_yuv(MotionPixelsContext *mp, int x, int y, const YuvPixel *p)
{
    int color;

    color = mp_yuv_to_rgb(p->y, p->v, p->u, 1);
    *(uint16_t *)&mp->frame->data[0][y * mp->frame->linesize[0] + x * 2] = color;
}

static av_always_inline int mp_get_vlc(MotionPixelsContext *mp, GetBitContext *gb)
{
    return mp->vlc.table ? get_vlc2(gb, mp->vlc.table, mp->max_codes_bits, 1)
                         : mp->codes[0].delta;
}

static void mp_decode_line(MotionPixelsContext *mp, GetBitContext *gb, int y)
{
    YuvPixel p;
    const int y0 = y * mp->avctx->width;
    int w, i, x = 0;

    p = mp->vpt[y];
    if (mp->changes_map[y0 + x] == 0) {
        memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
        ++x;
    }
    while (x < mp->avctx->width) {
        w = mp->changes_map[y0 + x];
        if (w != 0) {
            if ((y & 3) == 0) {
                if (mp->changes_map[y0 + x + mp->avctx->width] < w ||
                    mp->changes_map[y0 + x + mp->avctx->width * 2] < w ||
                    mp->changes_map[y0 + x + mp->avctx->width * 3] < w) {
                    for (i = (x + 3) & ~3; i < x + w; i += 4) {
                        mp->hpt[((y / 4) * mp->avctx->width + i) / 4] = mp_get_yuv_from_rgb(mp, i, y);
                    }
                }
            }
            x += w;
            memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
            p = mp_get_yuv_from_rgb(mp, x - 1, y);
        } else {
            p.y += mp_gradient(mp, 0, mp_get_vlc(mp, gb));
            p.y = av_clip_uintp2(p.y, 5);
            if ((x & 3) == 0) {
                if ((y & 3) == 0) {
                    p.v += mp_gradient(mp, 1, mp_get_vlc(mp, gb));
                    p.v = av_clip_intp2(p.v, 5);
                    p.u += mp_gradient(mp, 2, mp_get_vlc(mp, gb));
                    p.u = av_clip_intp2(p.u, 5);
                    mp->hpt[((y / 4) * mp->avctx->width + x) / 4] = p;
                } else {
                    p.v = mp->hpt[((y / 4) * mp->avctx->width + x) / 4].v;
                    p.u = mp->hpt[((y / 4) * mp->avctx->width + x) / 4].u;
                }
            }
            mp_set_rgb_from_yuv(mp, x, y, &p);
            ++x;
        }
    }
}

static void mp_decode_frame_helper(MotionPixelsContext *mp, GetBitContext *gb)
{
    YuvPixel p;
    int y, y0;

    av_assert1(mp->changes_map[0]);

    for (y = 0; y < mp->avctx->height; ++y) {
        if (mp->changes_map[y * mp->avctx->width] != 0) {
            memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
            p = mp_get_yuv_from_rgb(mp, 0, y);
        } else {
            p.y += mp_gradient(mp, 0, mp_get_vlc(mp, gb));
            p.y = av_clip_uintp2(p.y, 5);
            if ((y & 3) == 0) {
                p.v += mp_gradient(mp, 1, mp_get_vlc(mp, gb));
                p.v = av_clip_intp2(p.v, 5);
                p.u += mp_gradient(mp, 2, mp_get_vlc(mp, gb));
                p.u = av_clip_intp2(p.u, 5);
            }
            mp->vpt[y] = p;
            mp_set_rgb_from_yuv(mp, 0, y, &p);
        }
    }
    for (y0 = 0; y0 < 2; ++y0)
        for (y = y0; y < mp->avctx->height; y += 2)
            mp_decode_line(mp, gb, y);
}

static int mp_decode_frame(AVCodecContext *avctx,
                                 void *data, int *got_frame,
                                 AVPacket *avpkt)
{
    const uint8_t *buf = avpkt->data;
    int buf_size = avpkt->size;
    MotionPixelsContext *mp = avctx->priv_data;
    GetBitContext gb;
    int i, count1, count2, sz, ret;

    if ((ret = ff_reget_buffer(avctx, mp->frame, 0)) < 0)
        return ret;

    /* le32 bitstream msb first */
    av_fast_padded_malloc(&mp->bswapbuf, &mp->bswapbuf_size, buf_size);
    if (!mp->bswapbuf)
        return AVERROR(ENOMEM);
    mp->bdsp.bswap_buf((uint32_t *) mp->bswapbuf, (const uint32_t *) buf,
                       buf_size / 4);
    if (buf_size & 3)
        memcpy(mp->bswapbuf + (buf_size & ~3), buf + (buf_size & ~3), buf_size & 3);
    init_get_bits(&gb, mp->bswapbuf, buf_size * 8);

    memset(mp->changes_map, 0, avctx->width * avctx->height);
    for (i = !(avctx->extradata[1] & 2); i < 2; ++i) {
        count1 = get_bits(&gb, 12);
        count2 = get_bits(&gb, 12);
        mp_read_changes_map(mp, &gb, count1, 8, i);
        mp_read_changes_map(mp, &gb, count2, 4, i);
    }

    mp->codes_count = get_bits(&gb, 4);
    if (mp->codes_count == 0)
        goto end;

    if (mp->changes_map[0] == 0) {
        *(uint16_t *)mp->frame->data[0] = get_bits(&gb, 15);
        mp->changes_map[0] = 1;
    }
    if (mp_read_codes_table(mp, &gb) < 0)
        goto end;

    sz = get_bits(&gb, 18);
    if (avctx->extradata[0] != 5)
        sz += get_bits(&gb, 18);
    if (sz == 0)
        goto end;

    if (mp->codes_count > 1) {
        /* The entries of the mp->codes array are sorted from right to left
         * in the Huffman tree, hence -(int)sizeof(HuffCode). */
        ret = ff_init_vlc_from_lengths(&mp->vlc, mp->max_codes_bits, mp->codes_count,
                                       &mp->codes[mp->codes_count - 1].size,  -(int)sizeof(HuffCode),
                                       &mp->codes[mp->codes_count - 1].delta, -(int)sizeof(HuffCode), 1,
                                       0, 0, avctx);
        if (ret < 0)
            goto end;
    }
    mp_decode_frame_helper(mp, &gb);
    ff_free_vlc(&mp->vlc);

end:
    if ((ret = av_frame_ref(data, mp->frame)) < 0)
        return ret;
    *got_frame       = 1;
    return buf_size;
}

AVCodec ff_motionpixels_decoder = {
    .name           = "motionpixels",
    .long_name      = NULL_IF_CONFIG_SMALL("Motion Pixels video"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_MOTIONPIXELS,
    .priv_data_size = sizeof(MotionPixelsContext),
    .init           = mp_decode_init,
    .close          = mp_decode_end,
    .decode         = mp_decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1,
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP | FF_CODEC_CAP_INIT_THREADSAFE,
};


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* Motion Pixels Video Decoder
3			* Copyright (c) 2008 Gregory Montoir (cyx@users.sourceforge.net)
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			#include "libavutil/thread.h"
23
24			#include "config.h"
25
26			#include "avcodec.h"
27			#include "get_bits.h"
28			#include "bswapdsp.h"
29			#include "internal.h"
30
31			#define MAX_HUFF_CODES 16
32
33			#include "motionpixels_tablegen.h"
34
35			typedef struct HuffCode {
36			uint8_t size;
37			uint8_t delta;
38			} HuffCode;
39
40			typedef struct MotionPixelsContext {
41			AVCodecContext *avctx;
42			AVFrame *frame;
43			BswapDSPContext bdsp;
44			uint8_t *changes_map;
45			int offset_bits_len;
46			int codes_count, current_codes_count;
47			int max_codes_bits;
48			HuffCode codes[MAX_HUFF_CODES];
49			VLC vlc;
50			YuvPixel vpt, hpt;
51			uint8_t gradient_scale[3];
52			uint8_t *bswapbuf;
53			int bswapbuf_size;
54			} MotionPixelsContext;
55
56		2	static av_cold int mp_decode_end(AVCodecContext *avctx)
57			{
58		2	MotionPixelsContext *mp = avctx->priv_data;
59
60		2	av_freep(&mp->changes_map);
61		2	av_freep(&mp->vpt);
62		2	av_freep(&mp->hpt);
63		2	av_freep(&mp->bswapbuf);
64		2	av_frame_free(&mp->frame);
65
66		2	return 0;
67			}
68
69		2	static av_cold int mp_decode_init(AVCodecContext *avctx)
70			{
71			av_unused static AVOnce init_static_once = AV_ONCE_INIT;
72		2	MotionPixelsContext *mp = avctx->priv_data;
73		2	int w4 = (avctx->width + 3) & ~3;
74		2	int h4 = (avctx->height + 3) & ~3;
75
76	✗✓	2	if(avctx->extradata_size < 2){
77			av_log(avctx, AV_LOG_ERROR, "extradata too small\n");
78			return AVERROR_INVALIDDATA;
79			}
80
81		2	mp->avctx = avctx;
82		2	ff_bswapdsp_init(&mp->bdsp);
83		2	mp->changes_map = av_mallocz_array(avctx->width, h4);
84		2	mp->offset_bits_len = av_log2(avctx->width * avctx->height) + 1;
85		2	mp->vpt = av_mallocz_array(avctx->height, sizeof(YuvPixel));
86		2	mp->hpt = av_mallocz_array(h4 / 4, w4 / 4 * sizeof(YuvPixel));
87	✓✗✓✗ ✗✓	2	if (!mp->changes_map \|\| !mp->vpt \|\| !mp->hpt)
88			return AVERROR(ENOMEM);
89		2	avctx->pix_fmt = AV_PIX_FMT_RGB555;
90
91		2	mp->frame = av_frame_alloc();
92	✗✓	2	if (!mp->frame)
93			return AVERROR(ENOMEM);
94
95			#if !CONFIG_HARDCODED_TABLES
96		2	ff_thread_once(&init_static_once, motionpixels_tableinit);
97			#endif
98
99		2	return 0;
100			}
101
102		444	static void mp_read_changes_map(MotionPixelsContext mp, GetBitContext gb, int count, int bits_len, int read_color)
103			{
104			uint16_t *pixels;
105		444	int offset, w, h, color = 0, x, y, i;
106
107	✓✓	27419	while (count--) {
108		26975	offset = get_bits_long(gb, mp->offset_bits_len);
109		26975	w = get_bits(gb, bits_len) + 1;
110		26975	h = get_bits(gb, bits_len) + 1;
111	✓✓	26975	if (read_color)
112		16095	color = get_bits(gb, 15);
113		26975	x = offset % mp->avctx->width;
114		26975	y = offset / mp->avctx->width;
115	✗✓	26975	if (y >= mp->avctx->height)
116			continue;
117		26975	w = FFMIN(w, mp->avctx->width - x);
118		26975	h = FFMIN(h, mp->avctx->height - y);
119		26975	pixels = (uint16_t )&mp->frame->data[0][y mp->frame->linesize[0] + x * 2];
120	✓✓	325261	while (h--) {
121		298286	mp->changes_map[offset] = w;
122	✓✓	298286	if (read_color)
123	✓✓	1832851	for (i = 0; i < w; ++i)
124		1646821	pixels[i] = color;
125		298286	offset += mp->avctx->width;
126		298286	pixels += mp->frame->linesize[0] / 2;
127			}
128			}
129		444	}
130
131		1651	static int mp_get_code(MotionPixelsContext mp, GetBitContext gb, int size)
132			{
133	✓✓	3191	while (get_bits1(gb)) {
134		1540	++size;
135	✗✓	1540	if (size > mp->max_codes_bits) {
136			av_log(mp->avctx, AV_LOG_ERROR, "invalid code size %d/%d\n", size, mp->max_codes_bits);
137			return AVERROR_INVALIDDATA;
138			}
139	✗✓	1540	if (mp_get_code(mp, gb, size) < 0)
140			return AVERROR_INVALIDDATA;
141			}
142	✗✓	1651	if (mp->current_codes_count >= mp->codes_count) {
143			av_log(mp->avctx, AV_LOG_ERROR, "too many codes\n");
144			return AVERROR_INVALIDDATA;
145			}
146
147		1651	mp->codes[mp->current_codes_count++].size = size;
148		1651	return 0;
149			}
150
151		111	static int mp_read_codes_table(MotionPixelsContext mp, GetBitContext gb)
152			{
153	✗✓	111	if (mp->codes_count == 1) {
154			mp->codes[0].delta = get_bits(gb, 4);
155			} else {
156			int i;
157			int ret;
158
159		111	mp->max_codes_bits = get_bits(gb, 4);
160	✓✓	1762	for (i = 0; i < mp->codes_count; ++i)
161		1651	mp->codes[i].delta = get_bits(gb, 4);
162		111	mp->current_codes_count = 0;
163	✗✓	111	if ((ret = mp_get_code(mp, gb, 0)) < 0)
164			return ret;
165	✗✓	111	if (mp->current_codes_count < mp->codes_count) {
166			av_log(mp->avctx, AV_LOG_ERROR, "too few codes\n");
167			return AVERROR_INVALIDDATA;
168			}
169			}
170		111	return 0;
171			}
172
173		6395631	static av_always_inline int mp_gradient(MotionPixelsContext *mp, int component, int v)
174			{
175			int delta;
176
177		6395631	delta = (v - 7) * mp->gradient_scale[component];
178	✓✓✓✓	6395631	mp->gradient_scale[component] = (v == 0 \|\| v == 14) ? 2 : 1;
179		6395631	return delta;
180			}
181
182		340991	static YuvPixel mp_get_yuv_from_rgb(MotionPixelsContext *mp, int x, int y)
183			{
184			int color;
185
186		340991	color = (uint16_t )&mp->frame->data[0][y * mp->frame->linesize[0] + x * 2];
187		340991	return mp_rgb_yuv_table[color];
188			}
189
190		5666143	static void mp_set_rgb_from_yuv(MotionPixelsContext mp, int x, int y, const YuvPixel p)
191			{
192			int color;
193
194		5666143	color = mp_yuv_to_rgb(p->y, p->v, p->u, 1);
195		5666143	(uint16_t )&mp->frame->data[0][y * mp->frame->linesize[0] + x * 2] = color;
196		5666143	}
197
198		6395631	static av_always_inline int mp_get_vlc(MotionPixelsContext mp, GetBitContext gb)
199			{
200		6395631	return mp->vlc.table ? get_vlc2(gb, mp->vlc.table, mp->max_codes_bits, 1)
201	✓✗	12791262	: mp->codes[0].delta;
202			}
203
204		26640	static void mp_decode_line(MotionPixelsContext mp, GetBitContext gb, int y)
205			{
206			YuvPixel p;
207		26640	const int y0 = y * mp->avctx->width;
208		26640	int w, i, x = 0;
209
210		26640	p = mp->vpt[y];
211	✓✓	26640	if (mp->changes_map[y0 + x] == 0) {
212		18532	memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
213		18532	++x;
214			}
215	✓✓	5972637	while (x < mp->avctx->width) {
216		5945997	w = mp->changes_map[y0 + x];
217	✓✓	5945997	if (w != 0) {
218	✓✓	298386	if ((y & 3) == 0) {
219	✓✓	73166	if (mp->changes_map[y0 + x + mp->avctx->width] < w \|\|
220	✓✓	69448	mp->changes_map[y0 + x + mp->avctx->width * 2] < w \|\|
221	✓✓	65081	mp->changes_map[y0 + x + mp->avctx->width * 3] < w) {
222	✓✓	47814	for (i = (x + 3) & ~3; i < x + w; i += 4) {
223		34497	mp->hpt[((y / 4) * mp->avctx->width + i) / 4] = mp_get_yuv_from_rgb(mp, i, y);
224			}
225			}
226			}
227		298386	x += w;
228		298386	memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
229		298386	p = mp_get_yuv_from_rgb(mp, x - 1, y);
230			} else {
231		5647611	p.y += mp_gradient(mp, 0, mp_get_vlc(mp, gb));
232		5647611	p.y = av_clip_uintp2(p.y, 5);
233	✓✓	5647611	if ((x & 3) == 0) {
234	✓✓	1417461	if ((y & 3) == 0) {
235		360154	p.v += mp_gradient(mp, 1, mp_get_vlc(mp, gb));
236		360154	p.v = av_clip_intp2(p.v, 5);
237		360154	p.u += mp_gradient(mp, 2, mp_get_vlc(mp, gb));
238		360154	p.u = av_clip_intp2(p.u, 5);
239		360154	mp->hpt[((y / 4) * mp->avctx->width + x) / 4] = p;
240			} else {
241		1057307	p.v = mp->hpt[((y / 4) * mp->avctx->width + x) / 4].v;
242		1057307	p.u = mp->hpt[((y / 4) * mp->avctx->width + x) / 4].u;
243			}
244			}
245		5647611	mp_set_rgb_from_yuv(mp, x, y, &p);
246		5647611	++x;
247			}
248			}
249		26640	}
250
251		111	static void mp_decode_frame_helper(MotionPixelsContext mp, GetBitContext gb)
252			{
253			YuvPixel p;
254			int y, y0;
255
256			av_assert1(mp->changes_map[0]);
257
258	✓✓	26751	for (y = 0; y < mp->avctx->height; ++y) {
259	✓✓	26640	if (mp->changes_map[y * mp->avctx->width] != 0) {
260		8108	memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
261		8108	p = mp_get_yuv_from_rgb(mp, 0, y);
262			} else {
263		18532	p.y += mp_gradient(mp, 0, mp_get_vlc(mp, gb));
264		18532	p.y = av_clip_uintp2(p.y, 5);
265	✓✓	18532	if ((y & 3) == 0) {
266		4590	p.v += mp_gradient(mp, 1, mp_get_vlc(mp, gb));
267		4590	p.v = av_clip_intp2(p.v, 5);
268		4590	p.u += mp_gradient(mp, 2, mp_get_vlc(mp, gb));
269		4590	p.u = av_clip_intp2(p.u, 5);
270			}
271		18532	mp->vpt[y] = p;
272		18532	mp_set_rgb_from_yuv(mp, 0, y, &p);
273			}
274			}
275	✓✓	333	for (y0 = 0; y0 < 2; ++y0)
276	✓✓	26862	for (y = y0; y < mp->avctx->height; y += 2)
277		26640	mp_decode_line(mp, gb, y);
278		111	}
279
280		111	static int mp_decode_frame(AVCodecContext *avctx,
281			void data, int got_frame,
282			AVPacket *avpkt)
283			{
284		111	const uint8_t *buf = avpkt->data;
285		111	int buf_size = avpkt->size;
286		111	MotionPixelsContext *mp = avctx->priv_data;
287			GetBitContext gb;
288			int i, count1, count2, sz, ret;
289
290	✗✓	111	if ((ret = ff_reget_buffer(avctx, mp->frame, 0)) < 0)
291			return ret;
292
293			/* le32 bitstream msb first */
294		111	av_fast_padded_malloc(&mp->bswapbuf, &mp->bswapbuf_size, buf_size);
295	✗✓	111	if (!mp->bswapbuf)
296			return AVERROR(ENOMEM);
297		111	mp->bdsp.bswap_buf((uint32_t ) mp->bswapbuf, (const uint32_t ) buf,
298			buf_size / 4);
299	✓✓	111	if (buf_size & 3)
300		87	memcpy(mp->bswapbuf + (buf_size & ~3), buf + (buf_size & ~3), buf_size & 3);
301		111	init_get_bits(&gb, mp->bswapbuf, buf_size * 8);
302
303		111	memset(mp->changes_map, 0, avctx->width * avctx->height);
304	✓✓	333	for (i = !(avctx->extradata[1] & 2); i < 2; ++i) {
305		222	count1 = get_bits(&gb, 12);
306		222	count2 = get_bits(&gb, 12);
307		222	mp_read_changes_map(mp, &gb, count1, 8, i);
308		222	mp_read_changes_map(mp, &gb, count2, 4, i);
309			}
310
311		111	mp->codes_count = get_bits(&gb, 4);
312	✗✓	111	if (mp->codes_count == 0)
313			goto end;
314
315	✓✓	111	if (mp->changes_map[0] == 0) {
316		100	(uint16_t )mp->frame->data[0] = get_bits(&gb, 15);
317		100	mp->changes_map[0] = 1;
318			}
319	✗✓	111	if (mp_read_codes_table(mp, &gb) < 0)
320			goto end;
321
322		111	sz = get_bits(&gb, 18);
323	✓✗	111	if (avctx->extradata[0] != 5)
324		111	sz += get_bits(&gb, 18);
325	✗✓	111	if (sz == 0)
326			goto end;
327
328	✓✗	111	if (mp->codes_count > 1) {
329			/* The entries of the mp->codes array are sorted from right to left
330			* in the Huffman tree, hence -(int)sizeof(HuffCode). */
331		111	ret = ff_init_vlc_from_lengths(&mp->vlc, mp->max_codes_bits, mp->codes_count,
332		111	&mp->codes[mp->codes_count - 1].size, -(int)sizeof(HuffCode),
333		111	&mp->codes[mp->codes_count - 1].delta, -(int)sizeof(HuffCode), 1,
334			0, 0, avctx);
335	✗✓	111	if (ret < 0)
336			goto end;
337			}
338		111	mp_decode_frame_helper(mp, &gb);
339		111	ff_free_vlc(&mp->vlc);
340
341		111	end:
342	✗✓	111	if ((ret = av_frame_ref(data, mp->frame)) < 0)
343			return ret;
344		111	*got_frame = 1;
345		111	return buf_size;
346			}
347
348			AVCodec ff_motionpixels_decoder = {
349			.name = "motionpixels",
350			.long_name = NULL_IF_CONFIG_SMALL("Motion Pixels video"),
351			.type = AVMEDIA_TYPE_VIDEO,
352			.id = AV_CODEC_ID_MOTIONPIXELS,
353			.priv_data_size = sizeof(MotionPixelsContext),
354			.init = mp_decode_init,
355			.close = mp_decode_end,
356			.decode = mp_decode_frame,
357			.capabilities = AV_CODEC_CAP_DR1,
358			.caps_internal = FF_CODEC_CAP_INIT_CLEANUP \| FF_CODEC_CAP_INIT_THREADSAFE,
359			};