* Targa (.tga) image encoder
* Copyright (c) 2007 Bobby Bingham
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * 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.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
*/
+
+#include "libavutil/intreadwrite.h"
+#include "libavutil/pixdesc.h"
#include "avcodec.h"
+#include "rle.h"
+#include "targa.h"
+
+typedef struct TargaContext {
+ AVFrame picture;
+} TargaContext;
+
+/**
+ * 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
+ */
+static int targa_encode_rle(uint8_t *outbuf, int out_size, 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;
+}
static int targa_encode_normal(uint8_t *outbuf, AVFrame *pic, int bpp, int w, int h)
{
unsigned char *outbuf,
int buf_size, void *data){
AVFrame *p = data;
- int bpp;
+ int bpp, picsize, datasize = -1;
uint8_t *out;
if(avctx->width > 0xffff || avctx->height > 0xffff) {
av_log(avctx, AV_LOG_ERROR, "image dimensions too large\n");
- return -1;
+ return AVERROR(EINVAL);
}
- if(buf_size < avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height) + 45) {
+ picsize = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
+ if(buf_size < picsize + 45) {
av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
- return -1;
+ return AVERROR(EINVAL);
}
- p->pict_type= FF_I_TYPE;
+ p->pict_type= AV_PICTURE_TYPE_I;
p->key_frame= 1;
/* zero out the header and only set applicable fields */
- memset(outbuf, 0, 11);
+ memset(outbuf, 0, 12);
AV_WL16(outbuf+12, avctx->width);
AV_WL16(outbuf+14, avctx->height);
- outbuf[17] = 0x20; /* origin is top-left. no alpha */
+ /* image descriptor byte: origin is always top-left, bits 0-3 specify alpha */
+ outbuf[17] = 0x20 | (avctx->pix_fmt == PIX_FMT_BGRA ? 8 : 0);
- /* TODO: support alpha channel and RLE */
switch(avctx->pix_fmt) {
case PIX_FMT_GRAY8:
- outbuf[2] = 3; /* uncompressed grayscale image */
+ outbuf[2] = TGA_BW; /* uncompressed grayscale image */
outbuf[16] = 8; /* bpp */
break;
- case PIX_FMT_RGB555:
- outbuf[2] = 2; /* uncompresses true-color image */
+ case PIX_FMT_RGB555LE:
+ outbuf[2] = TGA_RGB; /* uncompresses true-color image */
outbuf[16] = 16; /* bpp */
break;
case PIX_FMT_BGR24:
- outbuf[2] = 2; /* uncompressed true-color image */
+ outbuf[2] = TGA_RGB; /* uncompressed true-color image */
outbuf[16] = 24; /* bpp */
break;
+ case PIX_FMT_BGRA:
+ outbuf[2] = TGA_RGB; /* uncompressed true-color image */
+ outbuf[16] = 32; /* bpp */
+ break;
default:
- return -1;
+ av_log(avctx, AV_LOG_ERROR, "Pixel format '%s' not supported.\n",
+ av_get_pix_fmt_name(avctx->pix_fmt));
+ return AVERROR(EINVAL);
}
bpp = outbuf[16] >> 3;
out = outbuf + 18; /* skip past the header we just output */
- out += targa_encode_normal(out, p, bpp, avctx->width, avctx->height);
+ /* 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)
+ outbuf[2] |= 8;
+
+ /* 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
return out + 26 - outbuf;
}
-static int targa_encode_init(AVCodecContext *avctx)
+static av_cold int targa_encode_init(AVCodecContext *avctx)
{
+ TargaContext *s = avctx->priv_data;
+
+ avcodec_get_frame_defaults(&s->picture);
+ s->picture.key_frame= 1;
+ avctx->coded_frame= &s->picture;
+
return 0;
}
-AVCodec targa_encoder = {
+AVCodec ff_targa_encoder = {
.name = "targa",
- .type = CODEC_TYPE_VIDEO,
+ .type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_TARGA,
- .priv_data_size = 0,
+ .priv_data_size = sizeof(TargaContext),
.init = targa_encode_init,
.encode = targa_encode_frame,
- .pix_fmts= (enum PixelFormat[]){PIX_FMT_BGR24, PIX_FMT_RGB555, PIX_FMT_GRAY8, -1},
+ .pix_fmts= (const enum PixelFormat[]){PIX_FMT_BGR24, PIX_FMT_BGRA, PIX_FMT_RGB555LE, PIX_FMT_GRAY8, PIX_FMT_NONE},
+ .long_name= NULL_IF_CONFIG_SMALL("Truevision Targa image"),
};
projects / ffmpeg / blobdiff