| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Cirrus Logic AccuPak (CLJR) decoder | ||
| 3 | * Copyright (c) 2003 Alex Beregszaszi | ||
| 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 | * Cirrus Logic AccuPak decoder. | ||
| 25 | */ | ||
| 26 | |||
| 27 | #include "avcodec.h" | ||
| 28 | #include "codec_internal.h" | ||
| 29 | #include "decode.h" | ||
| 30 | #include "get_bits.h" | ||
| 31 | |||
| 32 | 237 | static int decode_frame(AVCodecContext *avctx, AVFrame *p, | |
| 33 | int *got_frame, AVPacket *avpkt) | ||
| 34 | { | ||
| 35 | 237 | const uint8_t *buf = avpkt->data; | |
| 36 | 237 | int buf_size = avpkt->size; | |
| 37 | GetBitContext gb; | ||
| 38 | int x, y, ret; | ||
| 39 | |||
| 40 |
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237 | if (avctx->height <= 0 || avctx->width <= 0) { |
| 41 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid width or height\n"); | |
| 42 | ✗ | return AVERROR_INVALIDDATA; | |
| 43 | } | ||
| 44 | |||
| 45 |
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237 | if (buf_size / avctx->height < avctx->width) { |
| 46 | 1 | av_log(avctx, AV_LOG_ERROR, | |
| 47 | "Resolution larger than buffer size. Invalid header?\n"); | ||
| 48 | 1 | return AVERROR_INVALIDDATA; | |
| 49 | } | ||
| 50 | |||
| 51 |
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236 | if ((ret = ff_get_buffer(avctx, p, 0)) < 0) |
| 52 | ✗ | return ret; | |
| 53 | 236 | p->pict_type = AV_PICTURE_TYPE_I; | |
| 54 | 236 | p->flags |= AV_FRAME_FLAG_KEY; | |
| 55 | |||
| 56 | 236 | init_get_bits(&gb, buf, buf_size * 8); | |
| 57 | |||
| 58 |
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51616 | for (y = 0; y < avctx->height; y++) { |
| 59 | 51380 | uint8_t *luma = &p->data[0][y * p->linesize[0]]; | |
| 60 | 51380 | uint8_t *cb = &p->data[1][y * p->linesize[1]]; | |
| 61 | 51380 | uint8_t *cr = &p->data[2][y * p->linesize[2]]; | |
| 62 |
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4257080 | for (x = 0; x < avctx->width; x += 4) { |
| 63 | 4205700 | luma[3] = (get_bits(&gb, 5)*33) >> 2; | |
| 64 | 4205700 | luma[2] = (get_bits(&gb, 5)*33) >> 2; | |
| 65 | 4205700 | luma[1] = (get_bits(&gb, 5)*33) >> 2; | |
| 66 | 4205700 | luma[0] = (get_bits(&gb, 5)*33) >> 2; | |
| 67 | 4205700 | luma += 4; | |
| 68 | 4205700 | *(cb++) = get_bits(&gb, 6) << 2; | |
| 69 | 4205700 | *(cr++) = get_bits(&gb, 6) << 2; | |
| 70 | } | ||
| 71 | } | ||
| 72 | |||
| 73 | 236 | *got_frame = 1; | |
| 74 | |||
| 75 | 236 | return buf_size; | |
| 76 | } | ||
| 77 | |||
| 78 | 10 | static av_cold int decode_init(AVCodecContext *avctx) | |
| 79 | { | ||
| 80 | 10 | avctx->pix_fmt = AV_PIX_FMT_YUV411P; | |
| 81 | 10 | return 0; | |
| 82 | } | ||
| 83 | |||
| 84 | const FFCodec ff_cljr_decoder = { | ||
| 85 | .p.name = "cljr", | ||
| 86 | CODEC_LONG_NAME("Cirrus Logic AccuPak"), | ||
| 87 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
| 88 | .p.id = AV_CODEC_ID_CLJR, | ||
| 89 | .init = decode_init, | ||
| 90 | FF_CODEC_DECODE_CB(decode_frame), | ||
| 91 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
| 92 | }; | ||
| 93 | |||
| 94 |