| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Bitmap Brothers JV video decoder | ||
| 3 | * Copyright (c) 2011 Peter Ross <pross@xvid.org> | ||
| 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 | * Bitmap Brothers JV video decoder | ||
| 25 | * @author Peter Ross <pross@xvid.org> | ||
| 26 | */ | ||
| 27 | |||
| 28 | #include "libavutil/intreadwrite.h" | ||
| 29 | |||
| 30 | #include "avcodec.h" | ||
| 31 | #include "blockdsp.h" | ||
| 32 | #include "codec_internal.h" | ||
| 33 | #include "decode.h" | ||
| 34 | #include "get_bits.h" | ||
| 35 | |||
| 36 | typedef struct JvContext { | ||
| 37 | BlockDSPContext bdsp; | ||
| 38 | AVFrame *frame; | ||
| 39 | uint32_t palette[AVPALETTE_COUNT]; | ||
| 40 | } JvContext; | ||
| 41 | |||
| 42 | 3 | static av_cold int decode_init(AVCodecContext *avctx) | |
| 43 | { | ||
| 44 | 3 | JvContext *s = avctx->priv_data; | |
| 45 | |||
| 46 |
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3 | if (!avctx->width || !avctx->height || |
| 47 |
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3 | (avctx->width & 7) || (avctx->height & 7)) { |
| 48 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid video dimensions: %dx%d\n", | |
| 49 | avctx->width, avctx->height); | ||
| 50 | ✗ | return AVERROR(EINVAL); | |
| 51 | } | ||
| 52 | |||
| 53 | 3 | s->frame = av_frame_alloc(); | |
| 54 |
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3 | if (!s->frame) |
| 55 | ✗ | return AVERROR(ENOMEM); | |
| 56 | |||
| 57 | 3 | avctx->pix_fmt = AV_PIX_FMT_PAL8; | |
| 58 | 3 | ff_blockdsp_init(&s->bdsp); | |
| 59 | 3 | return 0; | |
| 60 | } | ||
| 61 | |||
| 62 | /** | ||
| 63 | * Decode 2x2 block | ||
| 64 | */ | ||
| 65 | 14056 | static inline void decode2x2(GetBitContext *gb, uint8_t *dst, int linesize) | |
| 66 | { | ||
| 67 | int i, j, v[2]; | ||
| 68 | |||
| 69 |
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14056 | switch (get_bits(gb, 2)) { |
| 70 | 348 | case 1: | |
| 71 | 348 | v[0] = get_bits(gb, 8); | |
| 72 |
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1044 | for (j = 0; j < 2; j++) |
| 73 | 696 | memset(dst + j * linesize, v[0], 2); | |
| 74 | 348 | break; | |
| 75 | 9984 | case 2: | |
| 76 | 9984 | v[0] = get_bits(gb, 8); | |
| 77 | 9984 | v[1] = get_bits(gb, 8); | |
| 78 |
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29952 | for (j = 0; j < 2; j++) |
| 79 |
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59904 | for (i = 0; i < 2; i++) |
| 80 | 39936 | dst[j * linesize + i] = v[get_bits1(gb)]; | |
| 81 | 9984 | break; | |
| 82 | 51 | case 3: | |
| 83 |
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153 | for (j = 0; j < 2; j++) |
| 84 |
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306 | for (i = 0; i < 2; i++) |
| 85 | 204 | dst[j * linesize + i] = get_bits(gb, 8); | |
| 86 | } | ||
| 87 | 14056 | } | |
| 88 | |||
| 89 | /** | ||
| 90 | * Decode 4x4 block | ||
| 91 | */ | ||
| 92 | 17028 | static inline void decode4x4(GetBitContext *gb, uint8_t *dst, int linesize) | |
| 93 | { | ||
| 94 | int i, j, v[2]; | ||
| 95 | |||
| 96 |
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17028 | switch (get_bits(gb, 2)) { |
| 97 | 139 | case 1: | |
| 98 | 139 | v[0] = get_bits(gb, 8); | |
| 99 |
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695 | for (j = 0; j < 4; j++) |
| 100 | 556 | memset(dst + j * linesize, v[0], 4); | |
| 101 | 139 | break; | |
| 102 | 11062 | case 2: | |
| 103 | 11062 | v[0] = get_bits(gb, 8); | |
| 104 | 11062 | v[1] = get_bits(gb, 8); | |
| 105 |
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33186 | for (j = 2; j >= 0; j -= 2) { |
| 106 |
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110620 | for (i = 0; i < 4; i++) |
| 107 | 88496 | dst[j * linesize + i] = v[get_bits1(gb)]; | |
| 108 |
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110620 | for (i = 0; i < 4; i++) |
| 109 | 88496 | dst[(j + 1) * linesize + i] = v[get_bits1(gb)]; | |
| 110 | } | ||
| 111 | 11062 | break; | |
| 112 | 3514 | case 3: | |
| 113 |
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10542 | for (j = 0; j < 4; j += 2) |
| 114 |
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21084 | for (i = 0; i < 4; i += 2) |
| 115 | 14056 | decode2x2(gb, dst + j * linesize + i, linesize); | |
| 116 | } | ||
| 117 | 17028 | } | |
| 118 | |||
| 119 | /** | ||
| 120 | * Decode 8x8 block | ||
| 121 | */ | ||
| 122 | 6000 | static inline void decode8x8(GetBitContext *gb, uint8_t *dst, int linesize, | |
| 123 | BlockDSPContext *bdsp) | ||
| 124 | { | ||
| 125 | int i, j, v[2]; | ||
| 126 | |||
| 127 |
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6000 | switch (get_bits(gb, 2)) { |
| 128 | 29 | case 1: | |
| 129 | 29 | v[0] = get_bits(gb, 8); | |
| 130 | 29 | bdsp->fill_block_tab[1](dst, v[0], linesize, 8); | |
| 131 | 29 | break; | |
| 132 | 218 | case 2: | |
| 133 | 218 | v[0] = get_bits(gb, 8); | |
| 134 | 218 | v[1] = get_bits(gb, 8); | |
| 135 |
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1962 | for (j = 7; j >= 0; j--) |
| 136 |
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15696 | for (i = 0; i < 8; i++) |
| 137 | 13952 | dst[j * linesize + i] = v[get_bits1(gb)]; | |
| 138 | 218 | break; | |
| 139 | 4257 | case 3: | |
| 140 |
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12771 | for (j = 0; j < 8; j += 4) |
| 141 |
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25542 | for (i = 0; i < 8; i += 4) |
| 142 | 17028 | decode4x4(gb, dst + j * linesize + i, linesize); | |
| 143 | } | ||
| 144 | 6000 | } | |
| 145 | |||
| 146 | 9 | static int decode_frame(AVCodecContext *avctx, AVFrame *rframe, | |
| 147 | int *got_frame, AVPacket *avpkt) | ||
| 148 | { | ||
| 149 | 9 | JvContext *s = avctx->priv_data; | |
| 150 | 9 | const uint8_t *buf = avpkt->data; | |
| 151 | 9 | const uint8_t *buf_end = buf + avpkt->size; | |
| 152 | int video_size, video_type, i, j, ret; | ||
| 153 | |||
| 154 |
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9 | if (avpkt->size < 6) |
| 155 | ✗ | return AVERROR_INVALIDDATA; | |
| 156 | |||
| 157 | 9 | video_size = AV_RL32(buf); | |
| 158 | 9 | video_type = buf[4]; | |
| 159 | 9 | buf += 5; | |
| 160 | |||
| 161 |
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9 | if (video_size) { |
| 162 |
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8 | if (video_size < 0 || video_size > avpkt->size - 5) { |
| 163 | 1 | av_log(avctx, AV_LOG_ERROR, "video size %d invalid\n", video_size); | |
| 164 | 1 | return AVERROR_INVALIDDATA; | |
| 165 | } | ||
| 166 | |||
| 167 |
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7 | if (video_type == 0 || video_type == 1) { |
| 168 | GetBitContext gb; | ||
| 169 | 6 | init_get_bits(&gb, buf, 8 * video_size); | |
| 170 | |||
| 171 |
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6 | if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0) |
| 172 | ✗ | return ret; | |
| 173 | |||
| 174 |
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6 | if (avctx->height/8 * (avctx->width/8) > 4 * video_size) { |
| 175 | ✗ | av_log(avctx, AV_LOG_ERROR, "Insufficient input data for dimensions\n"); | |
| 176 | ✗ | return AVERROR_INVALIDDATA; | |
| 177 | } | ||
| 178 | |||
| 179 |
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156 | for (j = 0; j < avctx->height; j += 8) |
| 180 |
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6150 | for (i = 0; i < avctx->width; i += 8) |
| 181 | 6000 | decode8x8(&gb, | |
| 182 | 6000 | s->frame->data[0] + j * s->frame->linesize[0] + i, | |
| 183 | 6000 | s->frame->linesize[0], &s->bdsp); | |
| 184 | |||
| 185 | 6 | buf += video_size; | |
| 186 |
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1 | } else if (video_type == 2) { |
| 187 | 1 | int v = *buf++; | |
| 188 | |||
| 189 | 1 | av_frame_unref(s->frame); | |
| 190 |
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1 | if ((ret = ff_get_buffer(avctx, s->frame, AV_GET_BUFFER_FLAG_REF)) < 0) |
| 191 | ✗ | return ret; | |
| 192 | |||
| 193 |
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201 | for (j = 0; j < avctx->height; j++) |
| 194 | 200 | memset(s->frame->data[0] + j * s->frame->linesize[0], | |
| 195 | 200 | v, avctx->width); | |
| 196 | } else { | ||
| 197 | ✗ | av_log(avctx, AV_LOG_WARNING, | |
| 198 | "unsupported frame type %i\n", video_type); | ||
| 199 | ✗ | return AVERROR_INVALIDDATA; | |
| 200 | } | ||
| 201 | } | ||
| 202 | |||
| 203 |
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8 | if (buf_end - buf >= AVPALETTE_COUNT * 3) { |
| 204 |
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257 | for (i = 0; i < AVPALETTE_COUNT; i++) { |
| 205 | 256 | uint32_t pal = AV_RB24(buf); | |
| 206 | 256 | s->palette[i] = 0xFFU << 24 | pal << 2 | ((pal >> 4) & 0x30303); | |
| 207 | 256 | buf += 3; | |
| 208 | } | ||
| 209 | } | ||
| 210 | |||
| 211 |
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8 | if (video_size) { |
| 212 | 7 | memcpy(s->frame->data[1], s->palette, AVPALETTE_SIZE); | |
| 213 | |||
| 214 |
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7 | if ((ret = av_frame_ref(rframe, s->frame)) < 0) |
| 215 | ✗ | return ret; | |
| 216 | 7 | *got_frame = 1; | |
| 217 | } | ||
| 218 | |||
| 219 | 8 | return avpkt->size; | |
| 220 | } | ||
| 221 | |||
| 222 | 3 | static av_cold int decode_close(AVCodecContext *avctx) | |
| 223 | { | ||
| 224 | 3 | JvContext *s = avctx->priv_data; | |
| 225 | |||
| 226 | 3 | av_frame_free(&s->frame); | |
| 227 | |||
| 228 | 3 | return 0; | |
| 229 | } | ||
| 230 | |||
| 231 | const FFCodec ff_jv_decoder = { | ||
| 232 | .p.name = "jv", | ||
| 233 | CODEC_LONG_NAME("Bitmap Brothers JV video"), | ||
| 234 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
| 235 | .p.id = AV_CODEC_ID_JV, | ||
| 236 | .priv_data_size = sizeof(JvContext), | ||
| 237 | .init = decode_init, | ||
| 238 | .close = decode_close, | ||
| 239 | FF_CODEC_DECODE_CB(decode_frame), | ||
| 240 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
| 241 | }; | ||
| 242 |