mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-12-02 08:37:12 +00:00
98 lines
2.9 KiB
C
98 lines
2.9 KiB
C
/*
|
|
* Cirrus Logic AccuPak (CLJR) encoder
|
|
* Copyright (c) 2003 Alex Beregszaszi
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* Cirrus Logic AccuPak encoder.
|
|
*/
|
|
|
|
#include "libavutil/common.h"
|
|
|
|
#include "avcodec.h"
|
|
#include "internal.h"
|
|
#include "put_bits.h"
|
|
|
|
static av_cold int encode_init(AVCodecContext *avctx)
|
|
{
|
|
avctx->coded_frame = av_frame_alloc();
|
|
if (!avctx->coded_frame)
|
|
return AVERROR(ENOMEM);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int encode_close(AVCodecContext *avctx)
|
|
{
|
|
av_frame_free(&avctx->coded_frame);
|
|
return 0;
|
|
}
|
|
|
|
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
|
|
const AVFrame *p, int *got_packet)
|
|
{
|
|
PutBitContext pb;
|
|
int x, y, ret;
|
|
|
|
if ((ret = ff_alloc_packet(pkt, 32*avctx->height*avctx->width/4)) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
|
|
return ret;
|
|
}
|
|
|
|
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
|
|
avctx->coded_frame->key_frame = 1;
|
|
|
|
init_put_bits(&pb, pkt->data, pkt->size);
|
|
|
|
for (y = 0; y < avctx->height; y++) {
|
|
uint8_t *luma = &p->data[0][y * p->linesize[0]];
|
|
uint8_t *cb = &p->data[1][y * p->linesize[1]];
|
|
uint8_t *cr = &p->data[2][y * p->linesize[2]];
|
|
for (x = 0; x < avctx->width; x += 4) {
|
|
put_bits(&pb, 5, luma[3] >> 3);
|
|
put_bits(&pb, 5, luma[2] >> 3);
|
|
put_bits(&pb, 5, luma[1] >> 3);
|
|
put_bits(&pb, 5, luma[0] >> 3);
|
|
luma += 4;
|
|
put_bits(&pb, 6, *(cb++) >> 2);
|
|
put_bits(&pb, 6, *(cr++) >> 2);
|
|
}
|
|
}
|
|
|
|
flush_put_bits(&pb);
|
|
|
|
pkt->size = put_bits_count(&pb) / 8;
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
*got_packet = 1;
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_cljr_encoder = {
|
|
.name = "cljr",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_CLJR,
|
|
.init = encode_init,
|
|
.encode2 = encode_frame,
|
|
.close = encode_close,
|
|
.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV411P,
|
|
AV_PIX_FMT_NONE },
|
|
};
|