ffmpeg/libavcodec/targaenc.c

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/*
* Targa (.tga) image encoder
* Copyright (c) 2007 Bobby Bingham
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string.h>
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/pixdesc.h"
#include "avcodec.h"
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#include "internal.h"
#include "rle.h"
#include "targa.h"
/**
* RLE compress the image, with maximum size of out_size
* @param outbuf Output buffer
* @param out_size Maximum output size
* @param pic Image to compress
* @param bpp Bytes per pixel
* @param w Image width
* @param h Image height
* @return Size of output in bytes, or -1 if larger than out_size
*/
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static int targa_encode_rle(uint8_t *outbuf, int out_size, const AVFrame *pic,
int bpp, int w, int h)
{
int y,ret;
uint8_t *out;
out = outbuf;
for(y = 0; y < h; y ++) {
ret = ff_rle_encode(out, out_size, pic->data[0] + pic->linesize[0] * y, bpp, w, 0x7f, 0, -1, 0);
if(ret == -1){
return -1;
}
out+= ret;
out_size -= ret;
}
return out - outbuf;
}
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static int targa_encode_normal(uint8_t *outbuf, const AVFrame *pic, int bpp, int w, int h)
{
int i, n = bpp * w;
uint8_t *out = outbuf;
uint8_t *ptr = pic->data[0];
for(i=0; i < h; i++) {
memcpy(out, ptr, n);
out += n;
ptr += pic->linesize[0];
}
return out - outbuf;
}
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static int targa_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *p, int *got_packet)
{
int bpp, picsize, datasize = -1, ret, i;
uint8_t *out;
if(avctx->width > 0xffff || avctx->height > 0xffff) {
av_log(avctx, AV_LOG_ERROR, "image dimensions too large\n");
return AVERROR(EINVAL);
}
picsize = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
if ((ret = ff_alloc_packet2(avctx, pkt, picsize + 45)) < 0)
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return ret;
/* zero out the header and only set applicable fields */
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memset(pkt->data, 0, 12);
AV_WL16(pkt->data+12, avctx->width);
AV_WL16(pkt->data+14, avctx->height);
/* image descriptor byte: origin is always top-left, bits 0-3 specify alpha */
pkt->data[17] = 0x20 | (avctx->pix_fmt == AV_PIX_FMT_BGRA ? 8 : 0);
out = pkt->data + 18; /* skip past the header we write */
avctx->bits_per_coded_sample = av_get_bits_per_pixel(av_pix_fmt_desc_get(avctx->pix_fmt));
switch(avctx->pix_fmt) {
case AV_PIX_FMT_PAL8: {
int pal_bpp = 24; /* Only write 32bit palette if there is transparency information */
for (i = 0; i < 256; i++)
if (AV_RN32(p->data[1] + 4 * i) >> 24 != 0xFF) {
pal_bpp = 32;
break;
}
pkt->data[1] = 1; /* palette present */
pkt->data[2] = TGA_PAL; /* uncompressed palettised image */
pkt->data[6] = 1; /* palette contains 256 entries */
pkt->data[7] = pal_bpp; /* palette contains pal_bpp bit entries */
pkt->data[16] = 8; /* bpp */
for (i = 0; i < 256; i++)
if (pal_bpp == 32) {
AV_WL32(pkt->data + 18 + 4 * i, *(uint32_t *)(p->data[1] + i * 4));
} else {
AV_WL24(pkt->data + 18 + 3 * i, *(uint32_t *)(p->data[1] + i * 4));
}
out += 32 * pal_bpp; /* skip past the palette we just output */
break;
}
case AV_PIX_FMT_GRAY8:
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pkt->data[2] = TGA_BW; /* uncompressed grayscale image */
avctx->bits_per_coded_sample = 0x28;
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pkt->data[16] = 8; /* bpp */
break;
case AV_PIX_FMT_RGB555LE:
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pkt->data[2] = TGA_RGB; /* uncompressed true-color image */
avctx->bits_per_coded_sample =
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pkt->data[16] = 16; /* bpp */
break;
case AV_PIX_FMT_BGR24:
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pkt->data[2] = TGA_RGB; /* uncompressed true-color image */
pkt->data[16] = 24; /* bpp */
break;
case AV_PIX_FMT_BGRA:
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pkt->data[2] = TGA_RGB; /* uncompressed true-color image */
pkt->data[16] = 32; /* bpp */
break;
default:
av_log(avctx, AV_LOG_ERROR, "Pixel format '%s' not supported.\n",
av_get_pix_fmt_name(avctx->pix_fmt));
return AVERROR(EINVAL);
}
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bpp = pkt->data[16] >> 3;
/* try RLE compression */
if (avctx->coder_type != FF_CODER_TYPE_RAW)
datasize = targa_encode_rle(out, picsize, p, bpp, avctx->width, avctx->height);
/* if that worked well, mark the picture as RLE compressed */
if(datasize >= 0)
pkt->data[2] |= TGA_RLE;
/* if RLE didn't make it smaller, go back to no compression */
else datasize = targa_encode_normal(out, p, bpp, avctx->width, avctx->height);
out += datasize;
/* The standard recommends including this section, even if we don't use
* any of the features it affords. TODO: take advantage of the pixel
* aspect ratio and encoder ID fields available? */
memcpy(out, "\0\0\0\0\0\0\0\0TRUEVISION-XFILE.", 26);
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pkt->size = out + 26 - pkt->data;
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
return 0;
}
AVCodec ff_targa_encoder = {
.name = "targa",
.long_name = NULL_IF_CONFIG_SMALL("Truevision Targa image"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_TARGA,
.encode2 = targa_encode_frame,
.pix_fmts = (const enum AVPixelFormat[]){
Merge commit '716d413c13981da15323c7a3821860536eefdbbb' * commit '716d413c13981da15323c7a3821860536eefdbbb': Replace PIX_FMT_* -> AV_PIX_FMT_*, PixelFormat -> AVPixelFormat Conflicts: doc/examples/muxing.c ffmpeg.h ffmpeg_filter.c ffmpeg_opt.c ffplay.c ffprobe.c libavcodec/8bps.c libavcodec/aasc.c libavcodec/aura.c libavcodec/avcodec.h libavcodec/avs.c libavcodec/bfi.c libavcodec/bmp.c libavcodec/bmpenc.c libavcodec/c93.c libavcodec/cscd.c libavcodec/cyuv.c libavcodec/dpx.c libavcodec/dpxenc.c libavcodec/eatgv.c libavcodec/escape124.c libavcodec/ffv1.c libavcodec/flashsv.c libavcodec/fraps.c libavcodec/h264.c libavcodec/huffyuv.c libavcodec/iff.c libavcodec/imgconvert.c libavcodec/indeo3.c libavcodec/kmvc.c libavcodec/libopenjpegdec.c libavcodec/libopenjpegenc.c libavcodec/libx264.c libavcodec/ljpegenc.c libavcodec/mjpegdec.c libavcodec/mjpegenc.c libavcodec/motionpixels.c libavcodec/mpeg12.c libavcodec/mpeg12enc.c libavcodec/mpeg4videodec.c libavcodec/mpegvideo_enc.c libavcodec/pamenc.c libavcodec/pcxenc.c libavcodec/pgssubdec.c libavcodec/pngdec.c libavcodec/pngenc.c libavcodec/pnm.c libavcodec/pnmdec.c libavcodec/pnmenc.c libavcodec/ptx.c libavcodec/qdrw.c libavcodec/qpeg.c libavcodec/qtrleenc.c libavcodec/raw.c libavcodec/rawdec.c libavcodec/rl2.c libavcodec/sgidec.c libavcodec/sgienc.c libavcodec/snowdec.c libavcodec/snowenc.c libavcodec/sunrast.c libavcodec/targa.c libavcodec/targaenc.c libavcodec/tiff.c libavcodec/tiffenc.c libavcodec/tmv.c libavcodec/truemotion2.c libavcodec/utils.c libavcodec/vb.c libavcodec/vp3.c libavcodec/wnv1.c libavcodec/xl.c libavcodec/xwddec.c libavcodec/xwdenc.c libavcodec/yop.c libavdevice/v4l2.c libavdevice/x11grab.c libavfilter/avfilter.c libavfilter/avfilter.h libavfilter/buffersrc.c libavfilter/drawutils.c libavfilter/formats.c libavfilter/src_movie.c libavfilter/vf_ass.c libavfilter/vf_drawtext.c libavfilter/vf_fade.c libavfilter/vf_format.c libavfilter/vf_hflip.c libavfilter/vf_lut.c libavfilter/vf_overlay.c libavfilter/vf_pad.c libavfilter/vf_scale.c libavfilter/vf_transpose.c libavfilter/vf_yadif.c libavfilter/video.c libavfilter/vsrc_testsrc.c libavformat/movenc.c libavformat/mxf.h libavformat/utils.c libavformat/yuv4mpeg.c libavutil/imgutils.c libavutil/pixdesc.c libswscale/input.c libswscale/output.c libswscale/swscale_internal.h libswscale/swscale_unscaled.c libswscale/utils.c libswscale/x86/swscale_template.c libswscale/x86/yuv2rgb.c libswscale/x86/yuv2rgb_template.c libswscale/yuv2rgb.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
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AV_PIX_FMT_BGR24, AV_PIX_FMT_BGRA, AV_PIX_FMT_RGB555LE, AV_PIX_FMT_GRAY8, AV_PIX_FMT_PAL8,
AV_PIX_FMT_NONE
},
};