* 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 "libavutil/opt.h"
+
#include "avcodec.h"
#include "bytestream.h"
+#include "internal.h"
#include "sgi.h"
#include "rle.h"
#define SGI_MULTI_CHAN 3
typedef struct SgiContext {
- AVFrame picture;
+ AVClass *class;
+
+ int rle;
} SgiContext;
static av_cold int encode_init(AVCodecContext *avctx)
{
- SgiContext *s = avctx->priv_data;
-
- avcodec_get_frame_defaults(&s->picture);
- avctx->coded_frame = &s->picture;
+ if (avctx->width > 65535 || avctx->height > 65535) {
+ av_log(avctx, AV_LOG_ERROR,
+ "Unsupported resolution %dx%d.\n", avctx->width, avctx->height);
+ return AVERROR_INVALIDDATA;
+ }
return 0;
}
-static int encode_frame(AVCodecContext *avctx, unsigned char *buf,
- int buf_size, void *data)
+static int sgi_rle_encode(PutByteContext *pbc, const uint8_t *src,
+ int w, int bpp)
+{
+ int val, count, x, start = bytestream2_tell_p(pbc);
+ void (*bytestream2_put)(PutByteContext *, unsigned int);
+
+ if (bpp == 1)
+ bytestream2_put = bytestream2_put_byte;
+ else
+ bytestream2_put = bytestream2_put_be16;
+
+ for (x = 0; x < w; x += count) {
+ /* see if we can encode the next set of pixels with RLE */
+ count = ff_rle_count_pixels(src, w - x, bpp, 1);
+ if (count > 1) {
+ if (bytestream2_get_bytes_left_p(pbc) < bpp * 2)
+ return AVERROR_INVALIDDATA;
+
+ val = bpp == 1 ? *src : AV_RB16(src);
+ bytestream2_put(pbc, count);
+ bytestream2_put(pbc, val);
+ } else {
+ int i;
+ /* fall back on uncompressed */
+ count = ff_rle_count_pixels(src, w - x, bpp, 0);
+ if (bytestream2_get_bytes_left_p(pbc) < bpp * (count + 1))
+ return AVERROR_INVALIDDATA;
+
+ bytestream2_put(pbc, count + 0x80);
+ for (i = 0; i < count; i++) {
+ val = bpp == 1 ? src[i] : AV_RB16(src + i * bpp);
+ bytestream2_put(pbc, val);
+ }
+ }
+
+ src += count * bpp;
+ }
+
+ return bytestream2_tell_p(pbc) - start;
+}
+
+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;
+ const AVFrame * const p = frame;
+ PutByteContext pbc;
+ uint8_t *in_buf, *encode_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 int bytes_per_channel, pixmax, put_be;
+
+#if FF_API_CODED_FRAME
+FF_DISABLE_DEPRECATION_WARNINGS
+ avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
+ avctx->coded_frame->key_frame = 1;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
- *p = *(AVFrame*)data;
- p->pict_type = FF_I_TYPE;
- p->key_frame = 1;
+#if FF_API_CODER_TYPE
+FF_DISABLE_DEPRECATION_WARNINGS
+ if (avctx->coder_type == FF_CODER_TYPE_RAW)
+ s->rle = 0;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
width = avctx->width;
height = avctx->height;
+ bytes_per_channel = 1;
+ pixmax = 0xFF;
+ put_be = HAVE_BIGENDIAN;
switch (avctx->pix_fmt) {
- case PIX_FMT_GRAY8:
+ case AV_PIX_FMT_GRAY8:
dimension = SGI_SINGLE_CHAN;
depth = SGI_GRAYSCALE;
break;
- case PIX_FMT_RGB24:
+ case AV_PIX_FMT_RGB24:
dimension = SGI_MULTI_CHAN;
depth = SGI_RGB;
break;
- case PIX_FMT_RGBA:
+ case AV_PIX_FMT_RGBA:
+ dimension = SGI_MULTI_CHAN;
+ depth = SGI_RGBA;
+ break;
+ case AV_PIX_FMT_GRAY16LE:
+ put_be = !HAVE_BIGENDIAN;
+ case AV_PIX_FMT_GRAY16BE:
+ bytes_per_channel = 2;
+ pixmax = 0xFFFF;
+ dimension = SGI_SINGLE_CHAN;
+ depth = SGI_GRAYSCALE;
+ break;
+ case AV_PIX_FMT_RGB48LE:
+ put_be = !HAVE_BIGENDIAN;
+ case AV_PIX_FMT_RGB48BE:
+ bytes_per_channel = 2;
+ pixmax = 0xFFFF;
+ dimension = SGI_MULTI_CHAN;
+ depth = SGI_RGB;
+ break;
+ case AV_PIX_FMT_RGBA64LE:
+ put_be = !HAVE_BIGENDIAN;
+ case AV_PIX_FMT_RGBA64BE:
+ bytes_per_channel = 2;
+ pixmax = 0xFFFF;
dimension = SGI_MULTI_CHAN;
depth = SGI_RGBA;
break;
}
tablesize = depth * height * 4;
- length = tablesize * 2 + SGI_HEADER_SIZE;
+ length = SGI_HEADER_SIZE;
+ if (!s->rle)
+ length += depth * height * width;
+ else // assume sgi_rle_encode() produces at most 2x size of input
+ length += tablesize * 2 + depth * height * (2 * width + 1);
- if (buf_size < length) {
- av_log(avctx, AV_LOG_ERROR, "buf_size too small(need %d, got %d)\n", length, buf_size);
- return -1;
+ if ((ret = ff_alloc_packet(pkt, bytes_per_channel * length)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Error getting output packet of size %d.\n", length);
+ return ret;
}
+ bytestream2_init_writer(&pbc, pkt->data, pkt->size);
+
/* Encode header. */
- bytestream_put_be16(&buf, SGI_MAGIC);
- 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);
- bytestream_put_be16(&buf, height);
- bytestream_put_be16(&buf, depth);
-
- /* The rest are constant in this implementation. */
- bytestream_put_be32(&buf, 0L); /* pixmin */
- bytestream_put_be32(&buf, 255L); /* pixmax */
- bytestream_put_be32(&buf, 0L); /* dummy */
+ bytestream2_put_be16(&pbc, SGI_MAGIC);
+ bytestream2_put_byte(&pbc, s->rle); /* RLE 1 - VERBATIM 0 */
+ bytestream2_put_byte(&pbc, bytes_per_channel);
+ bytestream2_put_be16(&pbc, dimension);
+ bytestream2_put_be16(&pbc, width);
+ bytestream2_put_be16(&pbc, height);
+ bytestream2_put_be16(&pbc, depth);
+
+ bytestream2_put_be32(&pbc, 0L); /* pixmin */
+ bytestream2_put_be32(&pbc, pixmax);
+ bytestream2_put_be32(&pbc, 0L); /* dummy */
/* name */
- memset(buf, 0, SGI_HEADER_SIZE);
- buf += 80;
+ bytestream2_skip_p(&pbc, 80);
- /* colormap */
- bytestream_put_be32(&buf, 0L);
+ /* colormap */
+ bytestream2_put_be32(&pbc, 0L);
/* The rest of the 512 byte header is unused. */
- buf += 404;
- offsettab = buf;
+ bytestream2_skip_p(&pbc, 404);
+
+ if (s->rle) {
+ PutByteContext taboff_pcb, tablen_pcb;
- if (avctx->coder_type != FF_CODER_TYPE_RAW) {
/* Skip RLE offset table. */
- buf += tablesize;
- lengthtab = buf;
+ bytestream2_init_writer(&taboff_pcb, pbc.buffer, tablesize);
+ bytestream2_skip_p(&pbc, tablesize);
/* Skip RLE length table. */
- buf += tablesize;
+ bytestream2_init_writer(&tablen_pcb, pbc.buffer, tablesize);
+ bytestream2_skip_p(&pbc, tablesize);
/* Make an intermediate consecutive buffer. */
- if (!(encode_buf = av_malloc(width)))
- return -1;
+ if (!(encode_buf = av_malloc(width * bytes_per_channel)))
+ return AVERROR(ENOMEM);
for (z = 0; z < depth; z++) {
- in_buf = p->data[0] + p->linesize[0] * (height - 1) + z;
+ in_buf = p->data[0] + p->linesize[0] * (height - 1) + z * bytes_per_channel;
for (y = 0; y < height; y++) {
- bytestream_put_be32(&offsettab, buf - orig_buf);
+ bytestream2_put_be32(&taboff_pcb, bytestream2_tell_p(&pbc));
- for (x = 0; x < width; x++)
+ for (x = 0; x < width * bytes_per_channel; x += bytes_per_channel)
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) {
+ length = sgi_rle_encode(&pbc, encode_buf, width,
+ bytes_per_channel);
+ if (length < 1) {
av_free(encode_buf);
- return -1;
+ return AVERROR_INVALIDDATA;
}
- buf += length;
- bytestream_put_byte(&buf, 0);
- bytestream_put_be32(&lengthtab, length + 1);
+ bytestream2_put_be32(&tablen_pcb, length);
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;
+ } else {
+ for (z = 0; z < depth; z++) {
+ in_buf = p->data[0] + p->linesize[0] * (height - 1) + z * bytes_per_channel;
- for (y = 0; y < height; y++) {
- for (x = 0; x < width * depth; x += depth)
- bytestream_put_byte(&buf, in_buf[x]);
+ for (y = 0; y < height; y++) {
+ for (x = 0; x < width * depth; x += depth)
+ if (bytes_per_channel == 1)
+ bytestream2_put_byte(&pbc, in_buf[x]);
+ else
+ if (put_be)
+ bytestream2_put_be16(&pbc, ((uint16_t *)in_buf)[x]);
+ else
+ bytestream2_put_le16(&pbc, ((uint16_t *)in_buf)[x]);
- in_buf -= p->linesize[0];
- }
+ in_buf -= p->linesize[0];
}
}
+ }
/* total length */
- return buf - orig_buf;
+ pkt->size = bytestream2_tell_p(&pbc);
+ 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"),
+#define OFFSET(x) offsetof(SgiContext, x)
+#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+ { "rle", "Use run-length compression", OFFSET(rle), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE },
+
+ { NULL },
+};
+
+static const AVClass sgi_class = {
+ .class_name = "sgi",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+AVCodec ff_sgi_encoder = {
+ .name = "sgi",
+ .long_name = NULL_IF_CONFIG_SMALL("SGI image"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_SGI,
+ .priv_data_size = sizeof(SgiContext),
+ .priv_class = &sgi_class,
+ .init = encode_init,
+ .encode2 = encode_frame,
+ .pix_fmts = (const enum AVPixelFormat[]) {
+ AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA,
+ AV_PIX_FMT_RGB48LE, AV_PIX_FMT_RGB48BE,
+ AV_PIX_FMT_RGBA64LE, AV_PIX_FMT_RGBA64BE,
+ AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_GRAY8,
+ AV_PIX_FMT_NONE
+ },
};
projects / ffmpeg / blobdiff