mirror of https://github.com/FFmpeg/FFmpeg.git
patch by Bobby Bingham % uhmmmm A gmail P com % Only handles 24-bit BGR and 8-bit grayscale, no RLE at the moment either. Original thread: Date: Mar 11, 2007 7:58 PM Subject: [Ffmpeg-devel] [PATCH] Targa encoder Originally committed as revision 8411 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
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/*
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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 other bit-depths. 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_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_GRAY8, -1}, |
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}; |
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