Head

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/asvdec.c	Lines:	137	152	90.1 %
Date:	2020-01-27 20:17:04	Branches:	79	96	82.3 %


/*
 * Copyright (c) 2003 Michael Niedermayer
 *
 * 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
 * ASUS V1/V2 decoder.
 */

#include "libavutil/attributes.h"
#include "libavutil/mem.h"

#include "asv.h"
#include "avcodec.h"
#include "blockdsp.h"
#include "idctdsp.h"
#include "internal.h"
#include "mathops.h"
#include "mpeg12data.h"

#define VLC_BITS             6
#define ASV2_LEVEL_VLC_BITS 10

static VLC ccp_vlc;
static VLC level_vlc;
static VLC dc_ccp_vlc;
static VLC ac_ccp_vlc;
static VLC asv2_level_vlc;

static av_cold void init_vlcs(ASV1Context *a)
{
    static int done = 0;

    if (!done) {
        done = 1;

        INIT_VLC_STATIC(&ccp_vlc, VLC_BITS, 17,
                        &ff_asv_ccp_tab[0][1], 2, 1,
                        &ff_asv_ccp_tab[0][0], 2, 1, 64);
        INIT_VLC_STATIC(&dc_ccp_vlc, VLC_BITS, 8,
                        &ff_asv_dc_ccp_tab[0][1], 2, 1,
                        &ff_asv_dc_ccp_tab[0][0], 2, 1, 64);
        INIT_VLC_STATIC(&ac_ccp_vlc, VLC_BITS, 16,
                        &ff_asv_ac_ccp_tab[0][1], 2, 1,
                        &ff_asv_ac_ccp_tab[0][0], 2, 1, 64);
        INIT_VLC_STATIC(&level_vlc,  VLC_BITS, 7,
                        &ff_asv_level_tab[0][1], 2, 1,
                        &ff_asv_level_tab[0][0], 2, 1, 64);
        INIT_VLC_STATIC(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,
                        &ff_asv2_level_tab[0][1], 2, 1,
                        &ff_asv2_level_tab[0][0], 2, 1, 1024);
    }
}

// FIXME write a reversed bitstream reader to avoid the double reverse
static inline int asv2_get_bits(GetBitContext *gb, int n)
{
    return ff_reverse[get_bits(gb, n) << (8 - n)];
}

static inline int asv1_get_level(GetBitContext *gb)
{
    int code = get_vlc2(gb, level_vlc.table, VLC_BITS, 1);

    if (code == 3)
        return get_sbits(gb, 8);
    else
        return code - 3;
}

static inline int asv2_get_level(GetBitContext *gb)
{
    int code = get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1);

    if (code == 31)
        return (int8_t) asv2_get_bits(gb, 8);
    else
        return code - 31;
}

static inline int asv1_decode_block(ASV1Context *a, int16_t block[64])
{
    int i;

    block[0] = 8 * get_bits(&a->gb, 8);

    for (i = 0; i < 11; i++) {
        const int ccp = get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);

        if (ccp) {
            if (ccp == 16)
                break;
            if (ccp < 0 || i >= 10) {
                av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n");
                return AVERROR_INVALIDDATA;
            }

            if (ccp & 8)
                block[a->scantable.permutated[4 * i + 0]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 0]) >> 4;
            if (ccp & 4)
                block[a->scantable.permutated[4 * i + 1]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 1]) >> 4;
            if (ccp & 2)
                block[a->scantable.permutated[4 * i + 2]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 2]) >> 4;
            if (ccp & 1)
                block[a->scantable.permutated[4 * i + 3]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 3]) >> 4;
        }
    }

    return 0;
}

static inline int asv2_decode_block(ASV1Context *a, int16_t block[64])
{
    int i, count, ccp;

    count = asv2_get_bits(&a->gb, 4);

    block[0] = 8 * asv2_get_bits(&a->gb, 8);

    ccp = get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);
    if (ccp) {
        if (ccp & 4)
            block[a->scantable.permutated[1]] = (asv2_get_level(&a->gb) * a->intra_matrix[1]) >> 4;
        if (ccp & 2)
            block[a->scantable.permutated[2]] = (asv2_get_level(&a->gb) * a->intra_matrix[2]) >> 4;
        if (ccp & 1)
            block[a->scantable.permutated[3]] = (asv2_get_level(&a->gb) * a->intra_matrix[3]) >> 4;
    }

    for (i = 1; i < count + 1; i++) {
        const int ccp = get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);

        if (ccp) {
            if (ccp & 8)
                block[a->scantable.permutated[4 * i + 0]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 0]) >> 4;
            if (ccp & 4)
                block[a->scantable.permutated[4 * i + 1]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 1]) >> 4;
            if (ccp & 2)
                block[a->scantable.permutated[4 * i + 2]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 2]) >> 4;
            if (ccp & 1)
                block[a->scantable.permutated[4 * i + 3]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 3]) >> 4;
        }
    }

    return 0;
}

static inline int decode_mb(ASV1Context *a, int16_t block[6][64])
{
    int i, ret;

    a->bdsp.clear_blocks(block[0]);

    if (a->avctx->codec_id == AV_CODEC_ID_ASV1) {
        for (i = 0; i < 6; i++) {
            if ((ret = asv1_decode_block(a, block[i])) < 0)
                return ret;
        }
    } else {
        for (i = 0; i < 6; i++) {
            if ((ret = asv2_decode_block(a, block[i])) < 0)
                return ret;
        }
    }
    return 0;
}

static inline void idct_put(ASV1Context *a, AVFrame *frame, int mb_x, int mb_y)
{
    int16_t(*block)[64] = a->block;
    int linesize = frame->linesize[0];

    uint8_t *dest_y  = frame->data[0] + (mb_y * 16 * linesize)           + mb_x * 16;
    uint8_t *dest_cb = frame->data[1] + (mb_y *  8 * frame->linesize[1]) + mb_x *  8;
    uint8_t *dest_cr = frame->data[2] + (mb_y *  8 * frame->linesize[2]) + mb_x *  8;

    a->idsp.idct_put(dest_y,                    linesize, block[0]);
    a->idsp.idct_put(dest_y + 8,                linesize, block[1]);
    a->idsp.idct_put(dest_y + 8 * linesize,     linesize, block[2]);
    a->idsp.idct_put(dest_y + 8 * linesize + 8, linesize, block[3]);

    if (!(a->avctx->flags & AV_CODEC_FLAG_GRAY)) {
        a->idsp.idct_put(dest_cb, frame->linesize[1], block[4]);
        a->idsp.idct_put(dest_cr, frame->linesize[2], block[5]);
    }
}

static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
                        AVPacket *avpkt)
{
    ASV1Context *const a = avctx->priv_data;
    const uint8_t *buf = avpkt->data;
    int buf_size       = avpkt->size;
    AVFrame *const p = data;
    int mb_x, mb_y, ret;

    if (buf_size * 8LL < a->mb_height * a->mb_width * 13LL)
        return AVERROR_INVALIDDATA;

    if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
        return ret;
    p->pict_type = AV_PICTURE_TYPE_I;
    p->key_frame = 1;

    av_fast_padded_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size,
                          buf_size);
    if (!a->bitstream_buffer)
        return AVERROR(ENOMEM);

    if (avctx->codec_id == AV_CODEC_ID_ASV1) {
        a->bbdsp.bswap_buf((uint32_t *) a->bitstream_buffer,
                           (const uint32_t *) buf, buf_size / 4);
    } else {
        int i;
        for (i = 0; i < buf_size; i++)
            a->bitstream_buffer[i] = ff_reverse[buf[i]];
    }

    init_get_bits(&a->gb, a->bitstream_buffer, buf_size * 8);

    for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
        for (mb_x = 0; mb_x < a->mb_width2; mb_x++) {
            if ((ret = decode_mb(a, a->block)) < 0)
                return ret;

            idct_put(a, p, mb_x, mb_y);
        }
    }

    if (a->mb_width2 != a->mb_width) {
        mb_x = a->mb_width2;
        for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
            if ((ret = decode_mb(a, a->block)) < 0)
                return ret;

            idct_put(a, p, mb_x, mb_y);
        }
    }

    if (a->mb_height2 != a->mb_height) {
        mb_y = a->mb_height2;
        for (mb_x = 0; mb_x < a->mb_width; mb_x++) {
            if ((ret = decode_mb(a, a->block)) < 0)
                return ret;

            idct_put(a, p, mb_x, mb_y);
        }
    }

    *got_frame = 1;

    emms_c();

    return (get_bits_count(&a->gb) + 31) / 32 * 4;
}

static av_cold int decode_init(AVCodecContext *avctx)
{
    ASV1Context *const a = avctx->priv_data;
    const int scale      = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
    int i;

    if (avctx->extradata_size < 1) {
        av_log(avctx, AV_LOG_WARNING, "No extradata provided\n");
    }

    ff_asv_common_init(avctx);
    ff_blockdsp_init(&a->bdsp, avctx);
    ff_idctdsp_init(&a->idsp, avctx);
    init_vlcs(a);
    ff_init_scantable(a->idsp.idct_permutation, &a->scantable, ff_asv_scantab);
    avctx->pix_fmt = AV_PIX_FMT_YUV420P;

    if (avctx->extradata_size < 1 || (a->inv_qscale = avctx->extradata[0]) == 0) {
        av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
        if (avctx->codec_id == AV_CODEC_ID_ASV1)
            a->inv_qscale = 6;
        else
            a->inv_qscale = 10;
    }

    for (i = 0; i < 64; i++) {
        int index = ff_asv_scantab[i];

        a->intra_matrix[i] = 64 * scale * ff_mpeg1_default_intra_matrix[index] /
                             a->inv_qscale;
    }

    return 0;
}

static av_cold int decode_end(AVCodecContext *avctx)
{
    ASV1Context *const a = avctx->priv_data;

    av_freep(&a->bitstream_buffer);
    a->bitstream_buffer_size = 0;

    return 0;
}

#if CONFIG_ASV1_DECODER
AVCodec ff_asv1_decoder = {
    .name           = "asv1",
    .long_name      = NULL_IF_CONFIG_SMALL("ASUS V1"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_ASV1,
    .priv_data_size = sizeof(ASV1Context),
    .init           = decode_init,
    .close          = decode_end,
    .decode         = decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1,
};
#endif

#if CONFIG_ASV2_DECODER
AVCodec ff_asv2_decoder = {
    .name           = "asv2",
    .long_name      = NULL_IF_CONFIG_SMALL("ASUS V2"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_ASV2,
    .priv_data_size = sizeof(ASV1Context),
    .init           = decode_init,
    .close          = decode_end,
    .decode         = decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1,
};
#endif


Generated by: GCOVR (Version 4.1)

Line	Branch	Exec	Source
1			/*
2			* Copyright (c) 2003 Michael Niedermayer
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			* ASUS V1/V2 decoder.
24			*/
25
26			#include "libavutil/attributes.h"
27			#include "libavutil/mem.h"
28
29			#include "asv.h"
30			#include "avcodec.h"
31			#include "blockdsp.h"
32			#include "idctdsp.h"
33			#include "internal.h"
34			#include "mathops.h"
35			#include "mpeg12data.h"
36
37			#define VLC_BITS 6
38			#define ASV2_LEVEL_VLC_BITS 10
39
40			static VLC ccp_vlc;
41			static VLC level_vlc;
42			static VLC dc_ccp_vlc;
43			static VLC ac_ccp_vlc;
44			static VLC asv2_level_vlc;
45
46		18	static av_cold void init_vlcs(ASV1Context *a)
47			{
48			static int done = 0;
49
50	✓✓	18	if (!done) {
51		10	done = 1;
52
53		10	INIT_VLC_STATIC(&ccp_vlc, VLC_BITS, 17,
54			&ff_asv_ccp_tab[0][1], 2, 1,
55			&ff_asv_ccp_tab[0][0], 2, 1, 64);
56		10	INIT_VLC_STATIC(&dc_ccp_vlc, VLC_BITS, 8,
57			&ff_asv_dc_ccp_tab[0][1], 2, 1,
58			&ff_asv_dc_ccp_tab[0][0], 2, 1, 64);
59		10	INIT_VLC_STATIC(&ac_ccp_vlc, VLC_BITS, 16,
60			&ff_asv_ac_ccp_tab[0][1], 2, 1,
61			&ff_asv_ac_ccp_tab[0][0], 2, 1, 64);
62		10	INIT_VLC_STATIC(&level_vlc, VLC_BITS, 7,
63			&ff_asv_level_tab[0][1], 2, 1,
64			&ff_asv_level_tab[0][0], 2, 1, 64);
65		10	INIT_VLC_STATIC(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,
66			&ff_asv2_level_tab[0][1], 2, 1,
67			&ff_asv2_level_tab[0][0], 2, 1, 1024);
68			}
69		18	}
70
71			// FIXME write a reversed bitstream reader to avoid the double reverse
72		718813	static inline int asv2_get_bits(GetBitContext *gb, int n)
73			{
74		718813	return ff_reverse[get_bits(gb, n) << (8 - n)];
75			}
76
77		2972884	static inline int asv1_get_level(GetBitContext *gb)
78			{
79		2972884	int code = get_vlc2(gb, level_vlc.table, VLC_BITS, 1);
80
81	✓✓	2972884	if (code == 3)
82		429712	return get_sbits(gb, 8);
83			else
84		2543172	return code - 3;
85			}
86
87		3660409	static inline int asv2_get_level(GetBitContext *gb)
88			{
89		3660409	int code = get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1);
90
91	✓✓	3660409	if (code == 31)
92		613	return (int8_t) asv2_get_bits(gb, 8);
93			else
94		3659796	return code - 31;
95			}
96
97		359100	static inline int asv1_decode_block(ASV1Context *a, int16_t block[64])
98			{
99			int i;
100
101		359100	block[0] = 8 * get_bits(&a->gb, 8);
102
103	✓✗	2128752	for (i = 0; i < 11; i++) {
104		2128752	const int ccp = get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);
105
106	✓✓	2128752	if (ccp) {
107	✓✓	1723494	if (ccp == 16)
108		359100	break;
109	✓✗✗✓	1364394	if (ccp < 0 \|\| i >= 10) {
110			av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n");
111			return AVERROR_INVALIDDATA;
112			}
113
114	✓✓	1364394	if (ccp & 8)
115		759471	block[a->scantable.permutated[4 * i + 0]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 0]) >> 4;
116	✓✓	1364394	if (ccp & 4)
117		828513	block[a->scantable.permutated[4 * i + 1]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 1]) >> 4;
118	✓✓	1364394	if (ccp & 2)
119		781213	block[a->scantable.permutated[4 * i + 2]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 2]) >> 4;
120	✓✓	1364394	if (ccp & 1)
121		603687	block[a->scantable.permutated[4 * i + 3]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 3]) >> 4;
122			}
123			}
124
125		359100	return 0;
126			}
127
128		359100	static inline int asv2_decode_block(ASV1Context *a, int16_t block[64])
129			{
130			int i, count, ccp;
131
132		359100	count = asv2_get_bits(&a->gb, 4);
133
134		359100	block[0] = 8 * asv2_get_bits(&a->gb, 8);
135
136		359100	ccp = get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);
137	✓✓	359100	if (ccp) {
138	✓✓	329075	if (ccp & 4)
139		281504	block[a->scantable.permutated[1]] = (asv2_get_level(&a->gb) * a->intra_matrix[1]) >> 4;
140	✓✓	329075	if (ccp & 2)
141		284503	block[a->scantable.permutated[2]] = (asv2_get_level(&a->gb) * a->intra_matrix[2]) >> 4;
142	✓✓	329075	if (ccp & 1)
143		226812	block[a->scantable.permutated[3]] = (asv2_get_level(&a->gb) * a->intra_matrix[3]) >> 4;
144			}
145
146	✓✓	2350028	for (i = 1; i < count + 1; i++) {
147		1990928	const int ccp = get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);
148
149	✓✓	1990928	if (ccp) {
150	✓✓	1368743	if (ccp & 8)
151		968959	block[a->scantable.permutated[4 * i + 0]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 0]) >> 4;
152	✓✓	1368743	if (ccp & 4)
153		733048	block[a->scantable.permutated[4 * i + 1]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 1]) >> 4;
154	✓✓	1368743	if (ccp & 2)
155		667011	block[a->scantable.permutated[4 * i + 2]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 2]) >> 4;
156	✓✓	1368743	if (ccp & 1)
157		498572	block[a->scantable.permutated[4 * i + 3]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 3]) >> 4;
158			}
159			}
160
161		359100	return 0;
162			}
163
164		119700	static inline int decode_mb(ASV1Context *a, int16_t block[6][64])
165			{
166			int i, ret;
167
168		119700	a->bdsp.clear_blocks(block[0]);
169
170	✓✓	119700	if (a->avctx->codec_id == AV_CODEC_ID_ASV1) {
171	✓✓	418950	for (i = 0; i < 6; i++) {
172	✗✓	359100	if ((ret = asv1_decode_block(a, block[i])) < 0)
173			return ret;
174			}
175			} else {
176	✓✓	418950	for (i = 0; i < 6; i++) {
177	✗✓	359100	if ((ret = asv2_decode_block(a, block[i])) < 0)
178			return ret;
179			}
180			}
181		119700	return 0;
182			}
183
184		119700	static inline void idct_put(ASV1Context a, AVFrame frame, int mb_x, int mb_y)
185			{
186		119700	int16_t(*block)[64] = a->block;
187		119700	int linesize = frame->linesize[0];
188
189		119700	uint8_t dest_y = frame->data[0] + (mb_y 16 * linesize) + mb_x * 16;
190		119700	uint8_t dest_cb = frame->data[1] + (mb_y 8 * frame->linesize[1]) + mb_x * 8;
191		119700	uint8_t dest_cr = frame->data[2] + (mb_y 8 * frame->linesize[2]) + mb_x * 8;
192
193		119700	a->idsp.idct_put(dest_y, linesize, block[0]);
194		119700	a->idsp.idct_put(dest_y + 8, linesize, block[1]);
195		119700	a->idsp.idct_put(dest_y + 8 * linesize, linesize, block[2]);
196		119700	a->idsp.idct_put(dest_y + 8 * linesize + 8, linesize, block[3]);
197
198	✓✗	119700	if (!(a->avctx->flags & AV_CODEC_FLAG_GRAY)) {
199		119700	a->idsp.idct_put(dest_cb, frame->linesize[1], block[4]);
200		119700	a->idsp.idct_put(dest_cr, frame->linesize[2], block[5]);
201			}
202		119700	}
203
204		400	static int decode_frame(AVCodecContext avctx, void data, int *got_frame,
205			AVPacket *avpkt)
206			{
207		400	ASV1Context *const a = avctx->priv_data;
208		400	const uint8_t *buf = avpkt->data;
209		400	int buf_size = avpkt->size;
210		400	AVFrame *const p = data;
211			int mb_x, mb_y, ret;
212
213	✗✓	400	if (buf_size * 8LL < a->mb_height * a->mb_width * 13LL)
214			return AVERROR_INVALIDDATA;
215
216	✗✓	400	if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
217			return ret;
218		400	p->pict_type = AV_PICTURE_TYPE_I;
219		400	p->key_frame = 1;
220
221		400	av_fast_padded_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size,
222			buf_size);
223	✗✓	400	if (!a->bitstream_buffer)
224			return AVERROR(ENOMEM);
225
226	✓✓	400	if (avctx->codec_id == AV_CODEC_ID_ASV1) {
227		200	a->bbdsp.bswap_buf((uint32_t *) a->bitstream_buffer,
228			(const uint32_t *) buf, buf_size / 4);
229			} else {
230			int i;
231	✓✓	2941200	for (i = 0; i < buf_size; i++)
232		2941000	a->bitstream_buffer[i] = ff_reverse[buf[i]];
233			}
234
235		400	init_get_bits(&a->gb, a->bitstream_buffer, buf_size * 8);
236
237	✓✓	6000	for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
238	✓✓	124800	for (mb_x = 0; mb_x < a->mb_width2; mb_x++) {
239	✗✓	119200	if ((ret = decode_mb(a, a->block)) < 0)
240			return ret;
241
242		119200	idct_put(a, p, mb_x, mb_y);
243			}
244			}
245
246	✓✓	400	if (a->mb_width2 != a->mb_width) {
247		100	mb_x = a->mb_width2;
248	✓✓	300	for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
249	✗✓	200	if ((ret = decode_mb(a, a->block)) < 0)
250			return ret;
251
252		200	idct_put(a, p, mb_x, mb_y);
253			}
254			}
255
256	✓✓	400	if (a->mb_height2 != a->mb_height) {
257		100	mb_y = a->mb_height2;
258	✓✓	400	for (mb_x = 0; mb_x < a->mb_width; mb_x++) {
259	✗✓	300	if ((ret = decode_mb(a, a->block)) < 0)
260			return ret;
261
262		300	idct_put(a, p, mb_x, mb_y);
263			}
264			}
265
266		400	*got_frame = 1;
267
268		400	emms_c();
269
270		400	return (get_bits_count(&a->gb) + 31) / 32 * 4;
271			}
272
273		18	static av_cold int decode_init(AVCodecContext *avctx)
274			{
275		18	ASV1Context *const a = avctx->priv_data;
276	✓✓	18	const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
277			int i;
278
279	✗✓	18	if (avctx->extradata_size < 1) {
280			av_log(avctx, AV_LOG_WARNING, "No extradata provided\n");
281			}
282
283		18	ff_asv_common_init(avctx);
284		18	ff_blockdsp_init(&a->bdsp, avctx);
285		18	ff_idctdsp_init(&a->idsp, avctx);
286		18	init_vlcs(a);
287		18	ff_init_scantable(a->idsp.idct_permutation, &a->scantable, ff_asv_scantab);
288		18	avctx->pix_fmt = AV_PIX_FMT_YUV420P;
289
290	✓✗✗✓	18	if (avctx->extradata_size < 1 \|\| (a->inv_qscale = avctx->extradata[0]) == 0) {
291			av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
292			if (avctx->codec_id == AV_CODEC_ID_ASV1)
293			a->inv_qscale = 6;
294			else
295			a->inv_qscale = 10;
296			}
297
298	✓✓	1170	for (i = 0; i < 64; i++) {
299		1152	int index = ff_asv_scantab[i];
300
301		1152	a->intra_matrix[i] = 64 * scale * ff_mpeg1_default_intra_matrix[index] /
302		1152	a->inv_qscale;
303			}
304
305		18	return 0;
306			}
307
308		18	static av_cold int decode_end(AVCodecContext *avctx)
309			{
310		18	ASV1Context *const a = avctx->priv_data;
311
312		18	av_freep(&a->bitstream_buffer);
313		18	a->bitstream_buffer_size = 0;
314
315		18	return 0;
316			}
317
318			#if CONFIG_ASV1_DECODER
319			AVCodec ff_asv1_decoder = {
320			.name = "asv1",
321			.long_name = NULL_IF_CONFIG_SMALL("ASUS V1"),
322			.type = AVMEDIA_TYPE_VIDEO,
323			.id = AV_CODEC_ID_ASV1,
324			.priv_data_size = sizeof(ASV1Context),
325			.init = decode_init,
326			.close = decode_end,
327			.decode = decode_frame,
328			.capabilities = AV_CODEC_CAP_DR1,
329			};
330			#endif
331
332			#if CONFIG_ASV2_DECODER
333			AVCodec ff_asv2_decoder = {
334			.name = "asv2",
335			.long_name = NULL_IF_CONFIG_SMALL("ASUS V2"),
336			.type = AVMEDIA_TYPE_VIDEO,
337			.id = AV_CODEC_ID_ASV2,
338			.priv_data_size = sizeof(ASV1Context),
339			.init = decode_init,
340			.close = decode_end,
341			.decode = decode_frame,
342			.capabilities = AV_CODEC_CAP_DR1,
343			};
344			#endif