[deb_ffmpeg.git] / ffmpeg / libavcodec / rv30.c

/*
 * RV30 decoder
 * Copyright (c) 2007 Konstantin Shishkov
 *
 * 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
 * RV30 decoder
 */

#include "avcodec.h"
#include "mpegutils.h"
#include "mpegvideo.h"
#include "golomb.h"

#include "rv34.h"
#include "rv30data.h"


static int rv30_parse_slice_header(RV34DecContext *r, GetBitContext *gb, SliceInfo *si)
{
    AVCodecContext *avctx = r->s.avctx;
    int mb_bits;
    int w = r->s.width, h = r->s.height;
    int mb_size;
    int rpr;

    memset(si, 0, sizeof(SliceInfo));
    if(get_bits(gb, 3))
        return -1;
    si->type = get_bits(gb, 2);
    if(si->type == 1) si->type = 0;
    if(get_bits1(gb))
        return -1;
    si->quant = get_bits(gb, 5);
    skip_bits1(gb);
    si->pts = get_bits(gb, 13);
    rpr = get_bits(gb, av_log2(r->max_rpr) + 1);
    if(rpr){
        if (rpr > r->max_rpr) {
            av_log(avctx, AV_LOG_ERROR, "rpr too large\n");
            return AVERROR_INVALIDDATA;
        }

        if (avctx->extradata_size < rpr * 2 + 8) {
            av_log(avctx, AV_LOG_ERROR,
                   "Insufficient extradata - need at least %d bytes, got %d\n",
                   8 + rpr * 2, avctx->extradata_size);
            return AVERROR(EINVAL);
        }

        w = r->s.avctx->extradata[6 + rpr*2] << 2;
        h = r->s.avctx->extradata[7 + rpr*2] << 2;
    }
    si->width  = w;
    si->height = h;
    mb_size = ((w + 15) >> 4) * ((h + 15) >> 4);
    mb_bits = ff_rv34_get_start_offset(gb, mb_size);
    si->start = get_bits(gb, mb_bits);
    skip_bits1(gb);
    return 0;
}

/**
 * Decode 4x4 intra types array.
 */
static int rv30_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t *dst)
{
    int i, j, k;

    for(i = 0; i < 4; i++, dst += r->intra_types_stride - 4){
        for(j = 0; j < 4; j+= 2){
            unsigned code = svq3_get_ue_golomb(gb) << 1;
            if (code > 80U*2U) {
                av_log(r->s.avctx, AV_LOG_ERROR, "Incorrect intra prediction code\n");
                return -1;
            }
            for(k = 0; k < 2; k++){
                int A = dst[-r->intra_types_stride] + 1;
                int B = dst[-1] + 1;
                *dst++ = rv30_itype_from_context[A * 90 + B * 9 + rv30_itype_code[code + k]];
                if(dst[-1] == 9){
                    av_log(r->s.avctx, AV_LOG_ERROR, "Incorrect intra prediction mode\n");
                    return -1;
                }
            }
        }
    }
    return 0;
}

/**
 * Decode macroblock information.
 */
static int rv30_decode_mb_info(RV34DecContext *r)
{
    static const int rv30_p_types[6] = { RV34_MB_SKIP, RV34_MB_P_16x16, RV34_MB_P_8x8, -1, RV34_MB_TYPE_INTRA, RV34_MB_TYPE_INTRA16x16 };
    static const int rv30_b_types[6] = { RV34_MB_SKIP, RV34_MB_B_DIRECT, RV34_MB_B_FORWARD, RV34_MB_B_BACKWARD, RV34_MB_TYPE_INTRA, RV34_MB_TYPE_INTRA16x16 };
    MpegEncContext *s = &r->s;
    GetBitContext *gb = &s->gb;
    unsigned code     = svq3_get_ue_golomb(gb);

    if (code > 11) {
        av_log(s->avctx, AV_LOG_ERROR, "Incorrect MB type code\n");
        return -1;
    }
    if(code > 5){
        av_log(s->avctx, AV_LOG_ERROR, "dquant needed\n");
        code -= 6;
    }
    if(s->pict_type != AV_PICTURE_TYPE_B)
        return rv30_p_types[code];
    else
        return rv30_b_types[code];
}

static inline void rv30_weak_loop_filter(uint8_t *src, const int step,
                                         const int stride, const int lim)
{
    const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
    int i, diff;

    for(i = 0; i < 4; i++){
        diff = ((src[-2*step] - src[1*step]) - (src[-1*step] - src[0*step])*4) >> 3;
        diff = av_clip(diff, -lim, lim);
        src[-1*step] = cm[src[-1*step] + diff];
        src[ 0*step] = cm[src[ 0*step] - diff];
        src += stride;
    }
}

static void rv30_loop_filter(RV34DecContext *r, int row)
{
    MpegEncContext *s = &r->s;
    int mb_pos, mb_x;
    int i, j, k;
    uint8_t *Y, *C;
    int loc_lim, cur_lim, left_lim = 0, top_lim = 0;

    mb_pos = row * s->mb_stride;
    for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
        int mbtype = s->current_picture_ptr->mb_type[mb_pos];
        if(IS_INTRA(mbtype) || IS_SEPARATE_DC(mbtype))
            r->deblock_coefs[mb_pos] = 0xFFFF;
        if(IS_INTRA(mbtype))
            r->cbp_chroma[mb_pos] = 0xFF;
    }

    /* all vertical edges are filtered first
     * and horizontal edges are filtered on the next iteration
     */
    mb_pos = row * s->mb_stride;
    for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
        cur_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos]];
        if(mb_x)
            left_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos - 1]];
        for(j = 0; j < 16; j += 4){
            Y = s->current_picture_ptr->f->data[0] + mb_x*16 + (row*16 + j) * s->linesize + 4 * !mb_x;
            for(i = !mb_x; i < 4; i++, Y += 4){
                int ij = i + j;
                loc_lim = 0;
                if(r->deblock_coefs[mb_pos] & (1 << ij))
                    loc_lim = cur_lim;
                else if(!i && r->deblock_coefs[mb_pos - 1] & (1 << (ij + 3)))
                    loc_lim = left_lim;
                else if( i && r->deblock_coefs[mb_pos]     & (1 << (ij - 1)))
                    loc_lim = cur_lim;
                if(loc_lim)
                    rv30_weak_loop_filter(Y, 1, s->linesize, loc_lim);
            }
        }
        for(k = 0; k < 2; k++){
            int cur_cbp, left_cbp = 0;
            cur_cbp = (r->cbp_chroma[mb_pos] >> (k*4)) & 0xF;
            if(mb_x)
                left_cbp = (r->cbp_chroma[mb_pos - 1] >> (k*4)) & 0xF;
            for(j = 0; j < 8; j += 4){
                C = s->current_picture_ptr->f->data[k + 1] + mb_x*8 + (row*8 + j) * s->uvlinesize + 4 * !mb_x;
                for(i = !mb_x; i < 2; i++, C += 4){
                    int ij = i + (j >> 1);
                    loc_lim = 0;
                    if (cur_cbp & (1 << ij))
                        loc_lim = cur_lim;
                    else if(!i && left_cbp & (1 << (ij + 1)))
                        loc_lim = left_lim;
                    else if( i && cur_cbp  & (1 << (ij - 1)))
                        loc_lim = cur_lim;
                    if(loc_lim)
                        rv30_weak_loop_filter(C, 1, s->uvlinesize, loc_lim);
                }
            }
        }
    }
    mb_pos = row * s->mb_stride;
    for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
        cur_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos]];
        if(row)
            top_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos - s->mb_stride]];
        for(j = 4*!row; j < 16; j += 4){
            Y = s->current_picture_ptr->f->data[0] + mb_x*16 + (row*16 + j) * s->linesize;
            for(i = 0; i < 4; i++, Y += 4){
                int ij = i + j;
                loc_lim = 0;
                if(r->deblock_coefs[mb_pos] & (1 << ij))
                    loc_lim = cur_lim;
                else if(!j && r->deblock_coefs[mb_pos - s->mb_stride] & (1 << (ij + 12)))
                    loc_lim = top_lim;
                else if( j && r->deblock_coefs[mb_pos]                & (1 << (ij - 4)))
                    loc_lim = cur_lim;
                if(loc_lim)
                    rv30_weak_loop_filter(Y, s->linesize, 1, loc_lim);
            }
        }
        for(k = 0; k < 2; k++){
            int cur_cbp, top_cbp = 0;
            cur_cbp = (r->cbp_chroma[mb_pos] >> (k*4)) & 0xF;
            if(row)
                top_cbp = (r->cbp_chroma[mb_pos - s->mb_stride] >> (k*4)) & 0xF;
            for(j = 4*!row; j < 8; j += 4){
                C = s->current_picture_ptr->f->data[k+1] + mb_x*8 + (row*8 + j) * s->uvlinesize;
                for(i = 0; i < 2; i++, C += 4){
                    int ij = i + (j >> 1);
                    loc_lim = 0;
                    if (r->cbp_chroma[mb_pos] & (1 << ij))
                        loc_lim = cur_lim;
                    else if(!j && top_cbp & (1 << (ij + 2)))
                        loc_lim = top_lim;
                    else if( j && cur_cbp & (1 << (ij - 2)))
                        loc_lim = cur_lim;
                    if(loc_lim)
                        rv30_weak_loop_filter(C, s->uvlinesize, 1, loc_lim);
                }
            }
        }
    }
}

/**
 * Initialize decoder.
 */
static av_cold int rv30_decode_init(AVCodecContext *avctx)
{
    RV34DecContext *r = avctx->priv_data;
    int ret;

    if (avctx->extradata_size < 2) {
        av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
        return AVERROR(EINVAL);
    }
    r->rv30 = 1;
    if ((ret = ff_rv34_decode_init(avctx)) < 0)
        return ret;

    r->max_rpr = avctx->extradata[1] & 7;
    if(avctx->extradata_size < 2*r->max_rpr + 8){
        av_log(avctx, AV_LOG_WARNING, "Insufficient extradata - need at least %d bytes, got %d\n",
               2*r->max_rpr + 8, avctx->extradata_size);
    }

    r->parse_slice_header = rv30_parse_slice_header;
    r->decode_intra_types = rv30_decode_intra_types;
    r->decode_mb_info     = rv30_decode_mb_info;
    r->loop_filter        = rv30_loop_filter;
    r->luma_dc_quant_i = rv30_luma_dc_quant;
    r->luma_dc_quant_p = rv30_luma_dc_quant;
    return 0;
}

AVCodec ff_rv30_decoder = {
    .name                  = "rv30",
    .long_name             = NULL_IF_CONFIG_SMALL("RealVideo 3.0"),
    .type                  = AVMEDIA_TYPE_VIDEO,
    .id                    = AV_CODEC_ID_RV30,
    .priv_data_size        = sizeof(RV34DecContext),
    .init                  = rv30_decode_init,
    .close                 = ff_rv34_decode_end,
    .decode                = ff_rv34_decode_frame,
    .capabilities          = CODEC_CAP_DR1 | CODEC_CAP_DELAY |
                             CODEC_CAP_FRAME_THREADS,
    .flush                 = ff_mpeg_flush,
    .pix_fmts              = (const enum AVPixelFormat[]) {
        AV_PIX_FMT_YUV420P,
        AV_PIX_FMT_NONE
    },
    .init_thread_copy      = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_init_thread_copy),
    .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_update_thread_context),
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* RV30 decoder
	3	* Copyright (c) 2007 Konstantin Shishkov
	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	/**
	23	* @file
	24	* RV30 decoder
	25	*/
	26
	27	#include "avcodec.h"
	28	#include "mpegutils.h"
	29	#include "mpegvideo.h"
	30	#include "golomb.h"
	31
	32	#include "rv34.h"
	33	#include "rv30data.h"
	34
	35
	36	static int rv30_parse_slice_header(RV34DecContext r, GetBitContext gb, SliceInfo *si)
	37	{
	38	AVCodecContext *avctx = r->s.avctx;
	39	int mb_bits;
	40	int w = r->s.width, h = r->s.height;
	41	int mb_size;
	42	int rpr;
	43
	44	memset(si, 0, sizeof(SliceInfo));
	45	if(get_bits(gb, 3))
	46	return -1;
	47	si->type = get_bits(gb, 2);
	48	if(si->type == 1) si->type = 0;
	49	if(get_bits1(gb))
	50	return -1;
	51	si->quant = get_bits(gb, 5);
	52	skip_bits1(gb);
	53	si->pts = get_bits(gb, 13);
	54	rpr = get_bits(gb, av_log2(r->max_rpr) + 1);
	55	if(rpr){
	56	if (rpr > r->max_rpr) {
	57	av_log(avctx, AV_LOG_ERROR, "rpr too large\n");
	58	return AVERROR_INVALIDDATA;
	59	}
	60
	61	if (avctx->extradata_size < rpr * 2 + 8) {
	62	av_log(avctx, AV_LOG_ERROR,
	63	"Insufficient extradata - need at least %d bytes, got %d\n",
	64	8 + rpr * 2, avctx->extradata_size);
65	return AVERROR(EINVAL);
66	}
67
68	w = r->s.avctx->extradata[6 + rpr*2] << 2;
69	h = r->s.avctx->extradata[7 + rpr*2] << 2;
70	}
71	si->width = w;
72	si->height = h;
73	mb_size = ((w + 15) >> 4) * ((h + 15) >> 4);
74	mb_bits = ff_rv34_get_start_offset(gb, mb_size);
75	si->start = get_bits(gb, mb_bits);
76	skip_bits1(gb);
77	return 0;
78	}
79
80	/**
81	* Decode 4x4 intra types array.
82	*/
83	static int rv30_decode_intra_types(RV34DecContext r, GetBitContext gb, int8_t *dst)
84	{
85	int i, j, k;
86
87	for(i = 0; i < 4; i++, dst += r->intra_types_stride - 4){
88	for(j = 0; j < 4; j+= 2){
89	unsigned code = svq3_get_ue_golomb(gb) << 1;
90	if (code > 80U*2U) {
91	av_log(r->s.avctx, AV_LOG_ERROR, "Incorrect intra prediction code\n");
92	return -1;
93	}
94	for(k = 0; k < 2; k++){
95	int A = dst[-r->intra_types_stride] + 1;
96	int B = dst[-1] + 1;
97	dst++ = rv30_itype_from_context[A 90 + B * 9 + rv30_itype_code[code + k]];
98	if(dst[-1] == 9){
99	av_log(r->s.avctx, AV_LOG_ERROR, "Incorrect intra prediction mode\n");
100	return -1;
101	}
102	}
103	}
104	}
105	return 0;
106	}
107
108	/**
109	* Decode macroblock information.
110	*/
111	static int rv30_decode_mb_info(RV34DecContext *r)
112	{
113	static const int rv30_p_types[6] = { RV34_MB_SKIP, RV34_MB_P_16x16, RV34_MB_P_8x8, -1, RV34_MB_TYPE_INTRA, RV34_MB_TYPE_INTRA16x16 };
114	static const int rv30_b_types[6] = { RV34_MB_SKIP, RV34_MB_B_DIRECT, RV34_MB_B_FORWARD, RV34_MB_B_BACKWARD, RV34_MB_TYPE_INTRA, RV34_MB_TYPE_INTRA16x16 };
115	MpegEncContext *s = &r->s;
116	GetBitContext *gb = &s->gb;
117	unsigned code = svq3_get_ue_golomb(gb);
118
119	if (code > 11) {
120	av_log(s->avctx, AV_LOG_ERROR, "Incorrect MB type code\n");
121	return -1;
122	}
123	if(code > 5){
124	av_log(s->avctx, AV_LOG_ERROR, "dquant needed\n");
125	code -= 6;
126	}
127	if(s->pict_type != AV_PICTURE_TYPE_B)
128	return rv30_p_types[code];
129	else
130	return rv30_b_types[code];
131	}
132
133	static inline void rv30_weak_loop_filter(uint8_t *src, const int step,
134	const int stride, const int lim)
135	{
136	const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
137	int i, diff;
138
139	for(i = 0; i < 4; i++){
140	diff = ((src[-2step] - src[1step]) - (src[-1step] - src[0step])*4) >> 3;
141	diff = av_clip(diff, -lim, lim);
142	src[-1step] = cm[src[-1step] + diff];
143	src[ 0step] = cm[src[ 0step] - diff];
144	src += stride;
145	}
146	}
147
148	static void rv30_loop_filter(RV34DecContext *r, int row)
149	{
150	MpegEncContext *s = &r->s;
151	int mb_pos, mb_x;
152	int i, j, k;
153	uint8_t Y, C;
154	int loc_lim, cur_lim, left_lim = 0, top_lim = 0;
155
156	mb_pos = row * s->mb_stride;
157	for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
158	int mbtype = s->current_picture_ptr->mb_type[mb_pos];
159	if(IS_INTRA(mbtype) \|\| IS_SEPARATE_DC(mbtype))
160	r->deblock_coefs[mb_pos] = 0xFFFF;
161	if(IS_INTRA(mbtype))
162	r->cbp_chroma[mb_pos] = 0xFF;
163	}
164
165	/* all vertical edges are filtered first
166	* and horizontal edges are filtered on the next iteration
167	*/
168	mb_pos = row * s->mb_stride;
169	for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
170	cur_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos]];
171	if(mb_x)
172	left_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos - 1]];
173	for(j = 0; j < 16; j += 4){
174	Y = s->current_picture_ptr->f->data[0] + mb_x16 + (row16 + j) * s->linesize + 4 * !mb_x;
175	for(i = !mb_x; i < 4; i++, Y += 4){
176	int ij = i + j;
177	loc_lim = 0;
178	if(r->deblock_coefs[mb_pos] & (1 << ij))
179	loc_lim = cur_lim;
180	else if(!i && r->deblock_coefs[mb_pos - 1] & (1 << (ij + 3)))
181	loc_lim = left_lim;
182	else if( i && r->deblock_coefs[mb_pos] & (1 << (ij - 1)))
183	loc_lim = cur_lim;
184	if(loc_lim)
185	rv30_weak_loop_filter(Y, 1, s->linesize, loc_lim);
186	}
187	}
188	for(k = 0; k < 2; k++){
189	int cur_cbp, left_cbp = 0;
190	cur_cbp = (r->cbp_chroma[mb_pos] >> (k*4)) & 0xF;
191	if(mb_x)
192	left_cbp = (r->cbp_chroma[mb_pos - 1] >> (k*4)) & 0xF;
193	for(j = 0; j < 8; j += 4){
194	C = s->current_picture_ptr->f->data[k + 1] + mb_x8 + (row8 + j) * s->uvlinesize + 4 * !mb_x;
195	for(i = !mb_x; i < 2; i++, C += 4){
196	int ij = i + (j >> 1);
197	loc_lim = 0;
198	if (cur_cbp & (1 << ij))
199	loc_lim = cur_lim;
200	else if(!i && left_cbp & (1 << (ij + 1)))
201	loc_lim = left_lim;
202	else if( i && cur_cbp & (1 << (ij - 1)))
203	loc_lim = cur_lim;
204	if(loc_lim)
205	rv30_weak_loop_filter(C, 1, s->uvlinesize, loc_lim);
206	}
207	}
208	}
209	}
210	mb_pos = row * s->mb_stride;
211	for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
212	cur_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos]];
213	if(row)
214	top_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos - s->mb_stride]];
215	for(j = 4*!row; j < 16; j += 4){
216	Y = s->current_picture_ptr->f->data[0] + mb_x16 + (row16 + j) * s->linesize;
217	for(i = 0; i < 4; i++, Y += 4){
218	int ij = i + j;
219	loc_lim = 0;
220	if(r->deblock_coefs[mb_pos] & (1 << ij))
221	loc_lim = cur_lim;
222	else if(!j && r->deblock_coefs[mb_pos - s->mb_stride] & (1 << (ij + 12)))
223	loc_lim = top_lim;
224	else if( j && r->deblock_coefs[mb_pos] & (1 << (ij - 4)))
225	loc_lim = cur_lim;
226	if(loc_lim)
227	rv30_weak_loop_filter(Y, s->linesize, 1, loc_lim);
228	}
229	}
230	for(k = 0; k < 2; k++){
231	int cur_cbp, top_cbp = 0;
232	cur_cbp = (r->cbp_chroma[mb_pos] >> (k*4)) & 0xF;
233	if(row)
234	top_cbp = (r->cbp_chroma[mb_pos - s->mb_stride] >> (k*4)) & 0xF;
235	for(j = 4*!row; j < 8; j += 4){
236	C = s->current_picture_ptr->f->data[k+1] + mb_x8 + (row8 + j) * s->uvlinesize;
237	for(i = 0; i < 2; i++, C += 4){
238	int ij = i + (j >> 1);
239	loc_lim = 0;
240	if (r->cbp_chroma[mb_pos] & (1 << ij))
241	loc_lim = cur_lim;
242	else if(!j && top_cbp & (1 << (ij + 2)))
243	loc_lim = top_lim;
244	else if( j && cur_cbp & (1 << (ij - 2)))
245	loc_lim = cur_lim;
246	if(loc_lim)
247	rv30_weak_loop_filter(C, s->uvlinesize, 1, loc_lim);
248	}
249	}
250	}
251	}
252	}
253
254	/**
255	* Initialize decoder.
256	*/
257	static av_cold int rv30_decode_init(AVCodecContext *avctx)
258	{
259	RV34DecContext *r = avctx->priv_data;
260	int ret;
261
f6fa7814 DM	262	if (avctx->extradata_size < 2) {
	263	av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
	264	return AVERROR(EINVAL);
	265	}
2ba45a60 DM	266	r->rv30 = 1;
	267	if ((ret = ff_rv34_decode_init(avctx)) < 0)
	268	return ret;
2ba45a60 DM	269
	270	r->max_rpr = avctx->extradata[1] & 7;
	271	if(avctx->extradata_size < 2*r->max_rpr + 8){
	272	av_log(avctx, AV_LOG_WARNING, "Insufficient extradata - need at least %d bytes, got %d\n",
	273	2*r->max_rpr + 8, avctx->extradata_size);
	274	}
	275
	276	r->parse_slice_header = rv30_parse_slice_header;
	277	r->decode_intra_types = rv30_decode_intra_types;
	278	r->decode_mb_info = rv30_decode_mb_info;
	279	r->loop_filter = rv30_loop_filter;
	280	r->luma_dc_quant_i = rv30_luma_dc_quant;
	281	r->luma_dc_quant_p = rv30_luma_dc_quant;
	282	return 0;
	283	}
	284
	285	AVCodec ff_rv30_decoder = {
	286	.name = "rv30",
	287	.long_name = NULL_IF_CONFIG_SMALL("RealVideo 3.0"),
	288	.type = AVMEDIA_TYPE_VIDEO,
	289	.id = AV_CODEC_ID_RV30,
	290	.priv_data_size = sizeof(RV34DecContext),
	291	.init = rv30_decode_init,
	292	.close = ff_rv34_decode_end,
	293	.decode = ff_rv34_decode_frame,
	294	.capabilities = CODEC_CAP_DR1 \| CODEC_CAP_DELAY \|
	295	CODEC_CAP_FRAME_THREADS,
	296	.flush = ff_mpeg_flush,
	297	.pix_fmts = (const enum AVPixelFormat[]) {
	298	AV_PIX_FMT_YUV420P,
	299	AV_PIX_FMT_NONE
	300	},
	301	.init_thread_copy = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_init_thread_copy),
	302	.update_thread_context = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_update_thread_context),
	303	};