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20f9727018
Up until now, codec.h contains both public and private parts of AVCodec. This exposes the internals of AVCodec to users and leads them into the temptation of actually using them and forces us to forward-declare structures and types that users can't use at all. This commit changes this by adding a new structure FFCodec to codec_internal.h that extends AVCodec, i.e. contains the public AVCodec as first member; the private fields of AVCodec are moved to this structure, leaving codec.h clean. Reviewed-by: Anton Khirnov <anton@khirnov.net> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
123 lines
4.2 KiB
C
123 lines
4.2 KiB
C
/*
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* Cirrus Logic AccuPak (CLJR) encoder
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* Copyright (c) 2003 Alex Beregszaszi
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Cirrus Logic AccuPak encoder.
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*/
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#include "libavutil/opt.h"
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#include "avcodec.h"
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#include "codec_internal.h"
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#include "encode.h"
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#include "put_bits.h"
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typedef struct CLJRContext {
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AVClass *avclass;
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int dither_type;
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} CLJRContext;
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static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *p, int *got_packet)
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{
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CLJRContext *a = avctx->priv_data;
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PutBitContext pb;
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int x, y, ret;
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uint32_t dither= avctx->frame_number;
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static const uint32_t ordered_dither[2][2] =
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{
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{ 0x10400000, 0x104F0000 },
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{ 0xCB2A0000, 0xCB250000 },
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};
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if (avctx->width%4 && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
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av_log(avctx, AV_LOG_ERROR,
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"Widths which are not a multiple of 4 might fail with some decoders, "
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"use vstrict=-1 / -strict -1 to use %d anyway.\n", avctx->width);
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return AVERROR_EXPERIMENTAL;
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}
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ret = ff_get_encode_buffer(avctx, pkt, 4 * avctx->height * ((avctx->width + 3) / 4), 0);
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if (ret < 0)
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return ret;
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init_put_bits(&pb, pkt->data, pkt->size);
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for (y = 0; y < avctx->height; y++) {
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uint8_t *luma = &p->data[0][y * p->linesize[0]];
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uint8_t *cb = &p->data[1][y * p->linesize[1]];
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uint8_t *cr = &p->data[2][y * p->linesize[2]];
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uint8_t luma_tmp[4];
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for (x = 0; x < avctx->width; x += 4) {
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switch (a->dither_type) {
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case 0: dither = 0x492A0000; break;
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case 1: dither = dither * 1664525 + 1013904223; break;
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case 2: dither = ordered_dither[ y&1 ][ (x>>2)&1 ];break;
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}
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if (x+3 >= avctx->width) {
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memset(luma_tmp, 0, sizeof(luma_tmp));
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memcpy(luma_tmp, luma, avctx->width - x);
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luma = luma_tmp;
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}
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put_bits(&pb, 5, (249*(luma[3] + (dither>>29) )) >> 11);
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put_bits(&pb, 5, (249*(luma[2] + ((dither>>26)&7))) >> 11);
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put_bits(&pb, 5, (249*(luma[1] + ((dither>>23)&7))) >> 11);
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put_bits(&pb, 5, (249*(luma[0] + ((dither>>20)&7))) >> 11);
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luma += 4;
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put_bits(&pb, 6, (253*(*(cb++) + ((dither>>18)&3))) >> 10);
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put_bits(&pb, 6, (253*(*(cr++) + ((dither>>16)&3))) >> 10);
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}
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}
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flush_put_bits(&pb);
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*got_packet = 1;
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return 0;
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}
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#define OFFSET(x) offsetof(CLJRContext, x)
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#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
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static const AVOption options[] = {
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{ "dither_type", "Dither type", OFFSET(dither_type), AV_OPT_TYPE_INT, { .i64=1 }, 0, 2, VE},
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{ NULL },
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};
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static const AVClass cljr_class = {
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.class_name = "cljr encoder",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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const FFCodec ff_cljr_encoder = {
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.p.name = "cljr",
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.p.long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_CLJR,
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.p.capabilities = AV_CODEC_CAP_DR1,
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.priv_data_size = sizeof(CLJRContext),
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.encode2 = encode_frame,
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.p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV411P,
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AV_PIX_FMT_NONE },
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.p.priv_class = &cljr_class,
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};
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