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102 lines
3.2 KiB
C
102 lines
3.2 KiB
C
/*
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* Targa (.tga) image encoder
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* Copyright (c) 2007 Bobby Bingham
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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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#include "avcodec.h"
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static int targa_encode_frame(AVCodecContext *avctx,
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unsigned char *outbuf,
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int buf_size, void *data){
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AVFrame *p = data;
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int i, n, linesize;
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uint8_t *ptr, *out;
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if(avctx->width > 0xffff || avctx->height > 0xffff) {
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av_log(avctx, AV_LOG_ERROR, "image dimensions too large\n");
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return -1;
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}
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if(buf_size < avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height) + 45) {
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av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
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return -1;
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}
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p->pict_type= FF_I_TYPE;
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p->key_frame= 1;
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/* zero out the header and only set applicable fields */
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memset(outbuf, 0, 11);
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AV_WL16(outbuf+12, avctx->width);
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AV_WL16(outbuf+14, avctx->height);
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outbuf[17] = 0x20; /* origin is top-left. no alpha */
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/* TODO: support alpha channel and RLE */
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switch(avctx->pix_fmt) {
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case PIX_FMT_GRAY8:
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outbuf[2] = 3; /* uncompressed grayscale image */
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outbuf[16] = 8; /* bpp */
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n = avctx->width;
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break;
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case PIX_FMT_RGB555:
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outbuf[2] = 2; /* uncompresses true-color image */
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outbuf[16] = 16; /* bpp */
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n = 2 * avctx->width;
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break;
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case PIX_FMT_BGR24:
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outbuf[2] = 2; /* uncompressed true-color image */
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outbuf[16] = 24; /* bpp */
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n = 3 * avctx->width;
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break;
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default:
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return -1;
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}
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out = outbuf + 18; /* skip past the header we just output */
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ptr = p->data[0];
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linesize = p->linesize[0];
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for(i=0; i < avctx->height; i++) {
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memcpy(out, ptr, n);
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out += n;
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ptr += linesize;
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}
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/* The standard recommends including this section, even if we don't use
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* any of the features it affords. TODO: take advantage of the pixel
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* aspect ratio and encoder ID fields available? */
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memcpy(out, "\0\0\0\0\0\0\0\0TRUEVISION-XFILE.", 26);
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return out + 26 - outbuf;
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}
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static int targa_encode_init(AVCodecContext *avctx)
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{
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return 0;
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}
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AVCodec targa_encoder = {
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.name = "targa",
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.type = CODEC_TYPE_VIDEO,
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.id = CODEC_ID_TARGA,
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.priv_data_size = 0,
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.init = targa_encode_init,
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.encode = targa_encode_frame,
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.pix_fmts= (enum PixelFormat[]){PIX_FMT_BGR24, PIX_FMT_RGB555, PIX_FMT_GRAY8, -1},
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};
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