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106 lines
3.5 KiB
106 lines
3.5 KiB
/* |
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* AVID Meridien encoder |
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* |
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* Copyright (c) 2012 Carl Eugen Hoyos |
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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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#include "avcodec.h" |
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#include "internal.h" |
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#include "libavutil/intreadwrite.h" |
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static av_cold int avui_encode_init(AVCodecContext *avctx) |
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{ |
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if (avctx->width != 720 || avctx->height != 486 && avctx->height != 576) { |
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av_log(avctx, AV_LOG_ERROR, "Only 720x486 and 720x576 are supported.\n"); |
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return AVERROR(EINVAL); |
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} |
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if (!(avctx->extradata = av_mallocz(144 + FF_INPUT_BUFFER_PADDING_SIZE))) |
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return AVERROR(ENOMEM); |
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avctx->extradata_size = 144; |
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memcpy(avctx->extradata, "\0\0\0\x18""APRGAPRG0001", 16); |
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if (avctx->field_order > AV_FIELD_PROGRESSIVE) { |
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avctx->extradata[19] = 2; |
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} else { |
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avctx->extradata[19] = 1; |
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} |
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memcpy(avctx->extradata + 24, "\0\0\0\x78""ARESARES0001""\0\0\0\x98", 20); |
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AV_WB32(avctx->extradata + 44, avctx->width); |
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AV_WB32(avctx->extradata + 48, avctx->height); |
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memcpy(avctx->extradata + 52, "\0\0\0\x1\0\0\0\x20\0\0\0\x2", 12); |
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return 0; |
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} |
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static int avui_encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
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const AVFrame *pic, int *got_packet) |
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{ |
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uint8_t *dst; |
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int i, j, skip, ret, size, interlaced; |
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interlaced = avctx->field_order > AV_FIELD_PROGRESSIVE; |
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if (avctx->height == 486) { |
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skip = 10; |
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} else { |
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skip = 16; |
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} |
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size = 2 * avctx->width * (avctx->height + skip) + 8 * interlaced; |
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if ((ret = ff_alloc_packet(pkt, size)) < 0) |
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return ret; |
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dst = pkt->data; |
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if (!interlaced) { |
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memset(dst, 0, avctx->width * skip); |
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dst += avctx->width * skip; |
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} |
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avctx->coded_frame->key_frame = 1; |
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avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I; |
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for (i = 0; i <= interlaced; i++) { |
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uint8_t *src; |
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if (interlaced && avctx->height == 486) { |
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src = pic->data[0] + (1 - i) * pic->linesize[0]; |
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} else { |
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src = pic->data[0] + i * pic->linesize[0]; |
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} |
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memset(dst, 0, avctx->width * skip + 4 * i); |
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dst += avctx->width * skip + 4 * i; |
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for (j = 0; j < avctx->height; j += interlaced + 1) { |
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memcpy(dst, src, avctx->width * 2); |
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src += (interlaced + 1) * pic->linesize[0]; |
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dst += avctx->width * 2; |
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} |
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} |
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pkt->flags |= AV_PKT_FLAG_KEY; |
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*got_packet = 1; |
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return 0; |
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} |
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AVCodec ff_avui_encoder = { |
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.name = "avui", |
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.long_name = NULL_IF_CONFIG_SMALL("Avid Meridien Uncompressed"), |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = AV_CODEC_ID_AVUI, |
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.init = avui_encode_init, |
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.encode2 = avui_encode_frame, |
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.capabilities = CODEC_CAP_EXPERIMENTAL, |
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.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_UYVY422, AV_PIX_FMT_NONE }, |
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};
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