* SGI image encoder
* Todd Kirby <doubleshot@pacbell.net>
*
- * 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"
#include "bytestream.h"
+#include "internal.h"
#include "sgi.h"
#include "rle.h"
AVFrame picture;
} SgiContext;
-static av_cold int encode_init(AVCodecContext *avctx){
+static av_cold int encode_init(AVCodecContext *avctx)
+{
SgiContext *s = avctx->priv_data;
avcodec_get_frame_defaults(&s->picture);
return 0;
}
-static int encode_frame(AVCodecContext *avctx, unsigned char *buf,
- int buf_size, void *data) {
+static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
+ const AVFrame *frame, int *got_packet)
+{
SgiContext *s = avctx->priv_data;
AVFrame * const p = &s->picture;
- uint8_t *offsettab, *lengthtab, *in_buf, *encode_buf;
- int x, y, z, length, tablesize;
+ uint8_t *offsettab, *lengthtab, *in_buf, *encode_buf, *buf;
+ int x, y, z, length, tablesize, ret;
unsigned int width, height, depth, dimension;
- unsigned char *orig_buf = buf, *end_buf = buf + buf_size;
+ unsigned char *end_buf;
- *p = *(AVFrame*)data;
- p->pict_type = FF_I_TYPE;
+ *p = *frame;
+ p->pict_type = AV_PICTURE_TYPE_I;
p->key_frame = 1;
- width = avctx->width;
+ width = avctx->width;
height = avctx->height;
switch (avctx->pix_fmt) {
- case PIX_FMT_GRAY8:
- dimension = SGI_SINGLE_CHAN;
- depth = SGI_GRAYSCALE;
- break;
- case PIX_FMT_RGB24:
- dimension = SGI_MULTI_CHAN;
- depth = SGI_RGB;
- break;
- case PIX_FMT_RGBA:
- dimension = SGI_MULTI_CHAN;
- depth = SGI_RGBA;
- break;
- default:
- return AVERROR_INVALIDDATA;
+ case PIX_FMT_GRAY8:
+ dimension = SGI_SINGLE_CHAN;
+ depth = SGI_GRAYSCALE;
+ break;
+ case PIX_FMT_RGB24:
+ dimension = SGI_MULTI_CHAN;
+ depth = SGI_RGB;
+ break;
+ case PIX_FMT_RGBA:
+ dimension = SGI_MULTI_CHAN;
+ depth = SGI_RGBA;
+ break;
+ default:
+ return AVERROR_INVALIDDATA;
}
tablesize = depth * height * 4;
- length = tablesize * 2 + SGI_HEADER_SIZE;
-
- if (buf_size < length) {
- av_log(avctx, AV_LOG_ERROR, "buf_size too small(need %d, got %d)\n", length, buf_size);
- return -1;
+ length = SGI_HEADER_SIZE;
+ if (avctx->coder_type == FF_CODER_TYPE_RAW)
+ length += depth * height * width;
+ else // assume ff_rl_encode() produces at most 2x size of input
+ length += tablesize * 2 + depth * height * (2 * width + 1);
+
+ if ((ret = ff_alloc_packet(pkt, length)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Error getting output packet of size %d.\n", length);
+ return ret;
}
+ buf = pkt->data;
+ end_buf = pkt->data + pkt->size;
/* Encode header. */
bytestream_put_be16(&buf, SGI_MAGIC);
- bytestream_put_byte(&buf, 1); /* RLE */
+ bytestream_put_byte(&buf, avctx->coder_type != FF_CODER_TYPE_RAW); /* RLE 1 - VERBATIM 0*/
bytestream_put_byte(&buf, 1); /* bytes_per_channel */
bytestream_put_be16(&buf, dimension);
bytestream_put_be16(&buf, width);
buf += 404;
offsettab = buf;
- /* Skip RLE offset table. */
- buf += tablesize;
- lengthtab = buf;
+ if (avctx->coder_type != FF_CODER_TYPE_RAW) {
+ /* Skip RLE offset table. */
+ buf += tablesize;
+ lengthtab = buf;
+
+ /* Skip RLE length table. */
+ buf += tablesize;
- /* Skip RLE length table. */
- buf += tablesize;
+ /* Make an intermediate consecutive buffer. */
+ if (!(encode_buf = av_malloc(width)))
+ return -1;
- /* Make an intermediate consecutive buffer. */
- if ((encode_buf = av_malloc(width)) == NULL)
- return -1;
+ for (z = 0; z < depth; z++) {
+ in_buf = p->data[0] + p->linesize[0] * (height - 1) + z;
- for (z = 0; z < depth; z++) {
- in_buf = p->data[0] + p->linesize[0] * (height - 1) + z;
+ for (y = 0; y < height; y++) {
+ bytestream_put_be32(&offsettab, buf - pkt->data);
- for (y = 0; y < height; y++) {
- bytestream_put_be32(&offsettab, buf - orig_buf);
+ for (x = 0; x < width; x++)
+ encode_buf[x] = in_buf[depth * x];
- for (x = 0; x < width; x++)
- encode_buf[x] = in_buf[depth * x];
+ if ((length = ff_rle_encode(buf, end_buf - buf - 1, encode_buf, 1, width, 0, 0, 0x80, 0)) < 1) {
+ av_free(encode_buf);
+ return -1;
+ }
- if((length = ff_rle_encode(buf, end_buf - buf - 1, encode_buf, 1, width, 0, 0, 0x80, 0)) < 1) {
- av_free(encode_buf);
- return -1;
+ buf += length;
+ bytestream_put_byte(&buf, 0);
+ bytestream_put_be32(&lengthtab, length + 1);
+ in_buf -= p->linesize[0];
}
+ }
+
+ av_free(encode_buf);
+ } else {
+ for (z = 0; z < depth; z++) {
+ in_buf = p->data[0] + p->linesize[0] * (height - 1) + z;
+
+ for (y = 0; y < height; y++) {
+ for (x = 0; x < width * depth; x += depth)
+ bytestream_put_byte(&buf, in_buf[x]);
- buf += length;
- bytestream_put_byte(&buf, 0);
- bytestream_put_be32(&lengthtab, length + 1);
- in_buf -= p->linesize[0];
+ in_buf -= p->linesize[0];
+ }
}
}
- av_free(encode_buf);
/* total length */
- return buf - orig_buf;
+ pkt->size = buf - pkt->data;
+ pkt->flags |= AV_PKT_FLAG_KEY;
+ *got_packet = 1;
+
+ return 0;
}
-AVCodec sgi_encoder = {
- "sgi",
- CODEC_TYPE_VIDEO,
- CODEC_ID_SGI,
- sizeof(SgiContext),
- encode_init,
- encode_frame,
- NULL,
- .pix_fmts= (const enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGBA, PIX_FMT_GRAY8, PIX_FMT_NONE},
- .long_name= NULL_IF_CONFIG_SMALL("SGI image"),
+AVCodec ff_sgi_encoder = {
+ .name = "sgi",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_SGI,
+ .priv_data_size = sizeof(SgiContext),
+ .init = encode_init,
+ .encode2 = encode_frame,
+ .pix_fmts = (const enum PixelFormat[]){
+ PIX_FMT_RGB24, PIX_FMT_RGBA, PIX_FMT_GRAY8, PIX_FMT_NONE
+ },
+ .long_name = NULL_IF_CONFIG_SMALL("SGI image"),
};
-
projects / ffmpeg / blobdiff