| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Cirrus Logic AccuPak (CLJR) encoder | ||
| 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 encoder. | ||
| 25 | */ | ||
| 26 | |||
| 27 | #include "libavutil/opt.h" | ||
| 28 | |||
| 29 | #include "avcodec.h" | ||
| 30 | #include "codec_internal.h" | ||
| 31 | #include "encode.h" | ||
| 32 | #include "put_bits.h" | ||
| 33 | |||
| 34 | typedef struct CLJRContext { | ||
| 35 | AVClass *avclass; | ||
| 36 | int dither_type; | ||
| 37 | } CLJRContext; | ||
| 38 | |||
| 39 | 200 | static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, | |
| 40 | const AVFrame *p, int *got_packet) | ||
| 41 | { | ||
| 42 | 200 | CLJRContext *a = avctx->priv_data; | |
| 43 | PutBitContext pb; | ||
| 44 | int x, y, ret; | ||
| 45 | 200 | uint32_t dither= avctx->frame_num; | |
| 46 | static const uint32_t ordered_dither[2][2] = | ||
| 47 | { | ||
| 48 | { 0x10400000, 0x104F0000 }, | ||
| 49 | { 0xCB2A0000, 0xCB250000 }, | ||
| 50 | }; | ||
| 51 | |||
| 52 |
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200 | if (avctx->width%4 && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) { |
| 53 | ✗ | av_log(avctx, AV_LOG_ERROR, | |
| 54 | "Widths which are not a multiple of 4 might fail with some decoders, " | ||
| 55 | "use vstrict=-1 / -strict -1 to use %d anyway.\n", avctx->width); | ||
| 56 | ✗ | return AVERROR_EXPERIMENTAL; | |
| 57 | } | ||
| 58 | |||
| 59 | 200 | ret = ff_get_encode_buffer(avctx, pkt, 4 * avctx->height * ((avctx->width + 3) / 4), 0); | |
| 60 |
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200 | if (ret < 0) |
| 61 | ✗ | return ret; | |
| 62 | |||
| 63 | 200 | init_put_bits(&pb, pkt->data, pkt->size); | |
| 64 | |||
| 65 |
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45100 | for (y = 0; y < avctx->height; y++) { |
| 66 | 44900 | const uint8_t *luma = &p->data[0][y * p->linesize[0]]; | |
| 67 | 44900 | const uint8_t *cb = &p->data[1][y * p->linesize[1]]; | |
| 68 | 44900 | const uint8_t *cr = &p->data[2][y * p->linesize[2]]; | |
| 69 | uint8_t luma_tmp[4]; | ||
| 70 |
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3861800 | for (x = 0; x < avctx->width; x += 4) { |
| 71 |
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3816900 | switch (a->dither_type) { |
| 72 | ✗ | case 0: dither = 0x492A0000; break; | |
| 73 | 3816900 | case 1: dither = dither * 1664525 + 1013904223; break; | |
| 74 | ✗ | case 2: dither = ordered_dither[ y&1 ][ (x>>2)&1 ];break; | |
| 75 | } | ||
| 76 |
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3816900 | if (x+3 >= avctx->width) { |
| 77 | 1700 | memset(luma_tmp, 0, sizeof(luma_tmp)); | |
| 78 | 1700 | memcpy(luma_tmp, luma, avctx->width - x); | |
| 79 | 1700 | luma = luma_tmp; | |
| 80 | } | ||
| 81 | 3816900 | put_bits(&pb, 5, (249*(luma[3] + (dither>>29) )) >> 11); | |
| 82 | 3816900 | put_bits(&pb, 5, (249*(luma[2] + ((dither>>26)&7))) >> 11); | |
| 83 | 3816900 | put_bits(&pb, 5, (249*(luma[1] + ((dither>>23)&7))) >> 11); | |
| 84 | 3816900 | put_bits(&pb, 5, (249*(luma[0] + ((dither>>20)&7))) >> 11); | |
| 85 | 3816900 | luma += 4; | |
| 86 | 3816900 | put_bits(&pb, 6, (253*(*(cb++) + ((dither>>18)&3))) >> 10); | |
| 87 | 3816900 | put_bits(&pb, 6, (253*(*(cr++) + ((dither>>16)&3))) >> 10); | |
| 88 | } | ||
| 89 | } | ||
| 90 | |||
| 91 | 200 | flush_put_bits(&pb); | |
| 92 | |||
| 93 | 200 | *got_packet = 1; | |
| 94 | 200 | return 0; | |
| 95 | } | ||
| 96 | |||
| 97 | #define OFFSET(x) offsetof(CLJRContext, x) | ||
| 98 | #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM | ||
| 99 | static const AVOption options[] = { | ||
| 100 | { "dither_type", "Dither type", OFFSET(dither_type), AV_OPT_TYPE_INT, { .i64=1 }, 0, 2, VE}, | ||
| 101 | { NULL }, | ||
| 102 | }; | ||
| 103 | |||
| 104 | static const AVClass cljr_class = { | ||
| 105 | .class_name = "cljr encoder", | ||
| 106 | .item_name = av_default_item_name, | ||
| 107 | .option = options, | ||
| 108 | .version = LIBAVUTIL_VERSION_INT, | ||
| 109 | }; | ||
| 110 | |||
| 111 | const FFCodec ff_cljr_encoder = { | ||
| 112 | .p.name = "cljr", | ||
| 113 | CODEC_LONG_NAME("Cirrus Logic AccuPak"), | ||
| 114 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
| 115 | .p.id = AV_CODEC_ID_CLJR, | ||
| 116 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE, | ||
| 117 | .priv_data_size = sizeof(CLJRContext), | ||
| 118 | FF_CODEC_ENCODE_CB(encode_frame), | ||
| 119 | .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV411P, | ||
| 120 | AV_PIX_FMT_NONE }, | ||
| 121 | .p.priv_class = &cljr_class, | ||
| 122 | }; | ||
| 123 |