* 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 "avcodec.h"
-/**
- * Count up to 127 consecutive pixels which are either all the same or
- * all differ from the previous and next pixels.
- * @param start Pointer to the first pixel
- * @param len Maximum number of pixels
- * @param bpp Bytes per pixel
- * @param same 1 if searching for identical pixel values. 0 for differing
- * @return Number of matching consecutive pixels found
- */
-static int count_pixels(uint8_t *start, int len, int bpp, int same)
-{
- uint8_t *pos;
- int count = 1;
-
- for(pos = start + bpp; count < FFMIN(128, len); pos += bpp, count ++) {
- if(same != !memcmp(pos-bpp, pos, bpp)) {
- if(!same) {
- /* if bpp == 1, then 0 1 1 0 is more efficiently encoded as a single
- * raw block of pixels. for larger bpp, RLE is as good or better */
- if(bpp == 1 && count + 1 < FFMIN(128, len) && *pos != *(pos+1))
- continue;
-
- /* if RLE can encode the next block better than as a raw block,
- * back up and leave _all_ the identical pixels for RLE */
- count --;
- }
- break;
- }
- }
+#include <string.h>
- return count;
-}
+#include "libavutil/internal.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/pixdesc.h"
+#include "avcodec.h"
+#include "internal.h"
+#include "rle.h"
+#include "targa.h"
/**
* RLE compress the image, with maximum size of out_size
* @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,
+static int targa_encode_rle(uint8_t *outbuf, int out_size, const AVFrame *pic,
int bpp, int w, int h)
{
- int count, x, y;
- uint8_t *ptr, *line, *out;
+ int y,ret;
+ uint8_t *out;
out = outbuf;
- line = pic->data[0];
for(y = 0; y < h; y ++) {
- ptr = line;
-
- for(x = 0; x < w; x += count) {
- /* see if we can encode the next set of pixels with RLE */
- if((count = count_pixels(ptr, w-x, bpp, 1)) > 1) {
- if(out + bpp + 1 > outbuf + out_size) return -1;
- *out++ = 0x80 | (count - 1);
- memcpy(out, ptr, bpp);
- out += bpp;
- } else {
- /* fall back on uncompressed */
- count = count_pixels(ptr, w-x, bpp, 0);
- *out++ = count - 1;
-
- if(out + bpp*count > outbuf + out_size) return -1;
- memcpy(out, ptr, bpp * count);
- out += bpp * count;
- }
- ptr += count * bpp;
+ 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;
}
-
- line += pic->linesize[0];
+ out+= ret;
+ out_size -= ret;
}
return out - outbuf;
}
-static int targa_encode_normal(uint8_t *outbuf, AVFrame *pic, int bpp, int w, int h)
+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;
return out - outbuf;
}
-static int targa_encode_frame(AVCodecContext *avctx,
- unsigned char *outbuf,
- int buf_size, void *data){
- AVFrame *p = data;
- int bpp, picsize, datasize;
+static int targa_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
+ const AVFrame *p, int *got_packet)
+{
+ int bpp, picsize, datasize = -1, ret;
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);
}
picsize = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
- if(buf_size < picsize + 45) {
+ if ((ret = ff_alloc_packet(pkt, picsize + 45)) < 0) {
av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
- return -1;
+ return ret;
}
- p->pict_type= FF_I_TYPE;
- p->key_frame= 1;
-
/* zero out the header and only set applicable fields */
- memset(outbuf, 0, 11);
- AV_WL16(outbuf+12, avctx->width);
- AV_WL16(outbuf+14, avctx->height);
- outbuf[17] = 0x20; /* origin is top-left. no alpha */
+ 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);
- /* TODO: support alpha channel */
switch(avctx->pix_fmt) {
- case PIX_FMT_GRAY8:
- outbuf[2] = 3; /* uncompressed grayscale image */
- outbuf[16] = 8; /* bpp */
+ case AV_PIX_FMT_GRAY8:
+ pkt->data[2] = TGA_BW; /* uncompressed grayscale image */
+ pkt->data[16] = 8; /* bpp */
break;
- case PIX_FMT_RGB555:
- outbuf[2] = 2; /* uncompresses true-color image */
- outbuf[16] = 16; /* bpp */
+ case AV_PIX_FMT_RGB555LE:
+ pkt->data[2] = TGA_RGB; /* uncompresses true-color image */
+ pkt->data[16] = 16; /* bpp */
break;
- case PIX_FMT_BGR24:
- outbuf[2] = 2; /* uncompressed true-color image */
- outbuf[16] = 24; /* bpp */
+ case AV_PIX_FMT_BGR24:
+ pkt->data[2] = TGA_RGB; /* uncompressed true-color image */
+ pkt->data[16] = 24; /* bpp */
+ break;
+ case AV_PIX_FMT_BGRA:
+ pkt->data[2] = TGA_RGB; /* uncompressed true-color image */
+ pkt->data[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;
+ bpp = pkt->data[16] >> 3;
- out = outbuf + 18; /* skip past the header we just output */
+ out = pkt->data + 18; /* skip past the header we just output */
/* try RLE compression */
- datasize = targa_encode_rle(out, picsize, p, bpp, avctx->width, avctx->height);
+ 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;
+ pkt->data[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);
* aspect ratio and encoder ID fields available? */
memcpy(out, "\0\0\0\0\0\0\0\0TRUEVISION-XFILE.", 26);
- return out + 26 - outbuf;
+ pkt->size = out + 26 - pkt->data;
+ pkt->flags |= AV_PKT_FLAG_KEY;
+ *got_packet = 1;
+
+ return 0;
}
-static int targa_encode_init(AVCodecContext *avctx)
+static av_cold int targa_encode_init(AVCodecContext *avctx)
{
+#if FF_API_CODED_FRAME
+FF_DISABLE_DEPRECATION_WARNINGS
+ avctx->coded_frame->key_frame = 1;
+ avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+
return 0;
}
-AVCodec targa_encoder = {
- .name = "targa",
- .type = CODEC_TYPE_VIDEO,
- .id = CODEC_ID_TARGA,
- .priv_data_size = 0,
- .init = targa_encode_init,
- .encode = targa_encode_frame,
- .pix_fmts= (enum PixelFormat[]){PIX_FMT_BGR24, PIX_FMT_RGB555, PIX_FMT_GRAY8, -1},
+AVCodec ff_targa_encoder = {
+ .name = "targa",
+ .long_name = NULL_IF_CONFIG_SMALL("Truevision Targa image"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_TARGA,
+ .init = targa_encode_init,
+ .encode2 = targa_encode_frame,
+ .pix_fmts = (const enum AVPixelFormat[]){
+ AV_PIX_FMT_BGR24, AV_PIX_FMT_BGRA, AV_PIX_FMT_RGB555LE, AV_PIX_FMT_GRAY8,
+ AV_PIX_FMT_NONE
+ },
};
projects / ffmpeg / blobdiff