[deb_ffmpeg.git] / ffmpeg / libavcodec / asvdec.c

/*
 * 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;

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

    if (a->avctx->codec_id == AV_CODEC_ID_ASV1) {
        for (i = 0; i < 6; i++) {
            if (asv1_decode_block(a, block[i]) < 0)
                return -1;
        }
    } else {
        for (i = 0; i < 6; i++) {
            if (asv2_decode_block(a, block[i]) < 0)
                return -1;
        }
    }
    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 & 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 ((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   = 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   = CODEC_CAP_DR1,
};
#endif
Commit	Line	Data
2ba45a60 DM	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	static av_cold void init_vlcs(ASV1Context *a)
	47	{
	48	static int done = 0;
	49
	50	if (!done) {
	51	done = 1;
	52
	53	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	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	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	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	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	}
70
71	// FIXME write a reversed bitstream reader to avoid the double reverse
72	static inline int asv2_get_bits(GetBitContext *gb, int n)
73	{
74	return ff_reverse[get_bits(gb, n) << (8 - n)];
75	}
76
77	static inline int asv1_get_level(GetBitContext *gb)
78	{
79	int code = get_vlc2(gb, level_vlc.table, VLC_BITS, 1);
80
81	if (code == 3)
82	return get_sbits(gb, 8);
83	else
84	return code - 3;
85	}
86
87	static inline int asv2_get_level(GetBitContext *gb)
88	{
89	int code = get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1);
90
91	if (code == 31)
92	return (int8_t) asv2_get_bits(gb, 8);
93	else
94	return code - 31;
95	}
96
97	static inline int asv1_decode_block(ASV1Context *a, int16_t block[64])
98	{
99	int i;
100
101	block[0] = 8 * get_bits(&a->gb, 8);
102
103	for (i = 0; i < 11; i++) {
104	const int ccp = get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);
105
106	if (ccp) {
107	if (ccp == 16)
108	break;
109	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	if (ccp & 8)
115	block[a->scantable.permutated[4 * i + 0]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 0]) >> 4;
116	if (ccp & 4)
117	block[a->scantable.permutated[4 * i + 1]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 1]) >> 4;
118	if (ccp & 2)
119	block[a->scantable.permutated[4 * i + 2]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 2]) >> 4;
120	if (ccp & 1)
121	block[a->scantable.permutated[4 * i + 3]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 3]) >> 4;
122	}
123	}
124
125	return 0;
126	}
127
128	static inline int asv2_decode_block(ASV1Context *a, int16_t block[64])
129	{
130	int i, count, ccp;
131
132	count = asv2_get_bits(&a->gb, 4);
133
134	block[0] = 8 * asv2_get_bits(&a->gb, 8);
135
136	ccp = get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);
137	if (ccp) {
138	if (ccp & 4)
139	block[a->scantable.permutated[1]] = (asv2_get_level(&a->gb) * a->intra_matrix[1]) >> 4;
140	if (ccp & 2)
141	block[a->scantable.permutated[2]] = (asv2_get_level(&a->gb) * a->intra_matrix[2]) >> 4;
142	if (ccp & 1)
143	block[a->scantable.permutated[3]] = (asv2_get_level(&a->gb) * a->intra_matrix[3]) >> 4;
144	}
145
146	for (i = 1; i < count + 1; i++) {
147	const int ccp = get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);
148
149	if (ccp) {
150	if (ccp & 8)
151	block[a->scantable.permutated[4 * i + 0]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 0]) >> 4;
152	if (ccp & 4)
153	block[a->scantable.permutated[4 * i + 1]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 1]) >> 4;
154	if (ccp & 2)
155	block[a->scantable.permutated[4 * i + 2]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 2]) >> 4;
156	if (ccp & 1)
157	block[a->scantable.permutated[4 * i + 3]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 3]) >> 4;
158	}
159	}
160
161	return 0;
162	}
163
164	static inline int decode_mb(ASV1Context *a, int16_t block[6][64])
165	{
166	int i;
167
168	a->bdsp.clear_blocks(block[0]);
169
170	if (a->avctx->codec_id == AV_CODEC_ID_ASV1) {
171	for (i = 0; i < 6; i++) {
172	if (asv1_decode_block(a, block[i]) < 0)
173	return -1;
174	}
175	} else {
176	for (i = 0; i < 6; i++) {
177	if (asv2_decode_block(a, block[i]) < 0)
178	return -1;
179	}
180	}
181	return 0;
182	}
183
184	static inline void idct_put(ASV1Context a, AVFrame frame, int mb_x, int mb_y)
185	{
186	int16_t(*block)[64] = a->block;
187	int linesize = frame->linesize[0];
188
189	uint8_t dest_y = frame->data[0] + (mb_y 16 * linesize) + mb_x * 16;
190	uint8_t dest_cb = frame->data[1] + (mb_y 8 * frame->linesize[1]) + mb_x * 8;
191	uint8_t dest_cr = frame->data[2] + (mb_y 8 * frame->linesize[2]) + mb_x * 8;
192
193	a->idsp.idct_put(dest_y, linesize, block[0]);
194	a->idsp.idct_put(dest_y + 8, linesize, block[1]);
195	a->idsp.idct_put(dest_y + 8 * linesize, linesize, block[2]);
196	a->idsp.idct_put(dest_y + 8 * linesize + 8, linesize, block[3]);
197
198	if (!(a->avctx->flags & CODEC_FLAG_GRAY)) {
199	a->idsp.idct_put(dest_cb, frame->linesize[1], block[4]);
200	a->idsp.idct_put(dest_cr, frame->linesize[2], block[5]);
201	}
202	}
203
204	static int decode_frame(AVCodecContext avctx, void data, int *got_frame,
205	AVPacket *avpkt)
206	{
207	ASV1Context *const a = avctx->priv_data;
208	const uint8_t *buf = avpkt->data;
209	int buf_size = avpkt->size;
210	AVFrame *const p = data;
211	int mb_x, mb_y, ret;
212
213	if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
214	return ret;
215	p->pict_type = AV_PICTURE_TYPE_I;
216	p->key_frame = 1;
217
218	av_fast_padded_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size,
219	buf_size);
220	if (!a->bitstream_buffer)
221	return AVERROR(ENOMEM);
222
223	if (avctx->codec_id == AV_CODEC_ID_ASV1) {
224	a->bbdsp.bswap_buf((uint32_t *) a->bitstream_buffer,
225	(const uint32_t *) buf, buf_size / 4);
226	} else {
227	int i;
228	for (i = 0; i < buf_size; i++)
229	a->bitstream_buffer[i] = ff_reverse[buf[i]];
230	}
231
232	init_get_bits(&a->gb, a->bitstream_buffer, buf_size * 8);
233
234	for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
235	for (mb_x = 0; mb_x < a->mb_width2; mb_x++) {
236	if ((ret = decode_mb(a, a->block)) < 0)
237	return ret;
238
239	idct_put(a, p, mb_x, mb_y);
240	}
241	}
242
243	if (a->mb_width2 != a->mb_width) {
244	mb_x = a->mb_width2;
245	for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
246	if ((ret = decode_mb(a, a->block)) < 0)
247	return ret;
248
249	idct_put(a, p, mb_x, mb_y);
250	}
251	}
252
253	if (a->mb_height2 != a->mb_height) {
254	mb_y = a->mb_height2;
255	for (mb_x = 0; mb_x < a->mb_width; mb_x++) {
256	if ((ret = decode_mb(a, a->block)) < 0)
257	return ret;
258
259	idct_put(a, p, mb_x, mb_y);
260	}
261	}
262
263	*got_frame = 1;
264
265	emms_c();
266
267	return (get_bits_count(&a->gb) + 31) / 32 * 4;
268	}
269
270	static av_cold int decode_init(AVCodecContext *avctx)
271	{
272	ASV1Context *const a = avctx->priv_data;
273	const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
274	int i;
275
276	if (avctx->extradata_size < 1) {
277	av_log(avctx, AV_LOG_WARNING, "No extradata provided\n");
278	}
279
280	ff_asv_common_init(avctx);
281	ff_blockdsp_init(&a->bdsp, avctx);
282	ff_idctdsp_init(&a->idsp, avctx);
283	init_vlcs(a);
284	ff_init_scantable(a->idsp.idct_permutation, &a->scantable, ff_asv_scantab);
285	avctx->pix_fmt = AV_PIX_FMT_YUV420P;
286
287	if (avctx->extradata_size < 1 \|\| (a->inv_qscale = avctx->extradata[0]) == 0) {
288	av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
289	if (avctx->codec_id == AV_CODEC_ID_ASV1)
290	a->inv_qscale = 6;
291	else
292	a->inv_qscale = 10;
293	}
294
295	for (i = 0; i < 64; i++) {
296	int index = ff_asv_scantab[i];
297
298	a->intra_matrix[i] = 64 * scale * ff_mpeg1_default_intra_matrix[index] /
299	a->inv_qscale;
300	}
301
302	return 0;
303	}
304
305	static av_cold int decode_end(AVCodecContext *avctx)
306	{
307	ASV1Context *const a = avctx->priv_data;
308
309	av_freep(&a->bitstream_buffer);
310	a->bitstream_buffer_size = 0;
311
312	return 0;
313	}
314
315	#if CONFIG_ASV1_DECODER
316	AVCodec ff_asv1_decoder = {
317	.name = "asv1",
318	.long_name = NULL_IF_CONFIG_SMALL("ASUS V1"),
319	.type = AVMEDIA_TYPE_VIDEO,
320	.id = AV_CODEC_ID_ASV1,
321	.priv_data_size = sizeof(ASV1Context),
322	.init = decode_init,
323	.close = decode_end,
324	.decode = decode_frame,
325	.capabilities = CODEC_CAP_DR1,
326	};
327	#endif
328
329	#if CONFIG_ASV2_DECODER
330	AVCodec ff_asv2_decoder = {
331	.name = "asv2",
332	.long_name = NULL_IF_CONFIG_SMALL("ASUS V2"),
333	.type = AVMEDIA_TYPE_VIDEO,
334	.id = AV_CODEC_ID_ASV2,
335	.priv_data_size = sizeof(ASV1Context),
336	.init = decode_init,
337	.close = decode_end,
338	.decode = decode_frame,
339	.capabilities = CODEC_CAP_DR1,
340	};
341	#endif