0,0 → 1,223 |
/* |
* SGI image encoder |
* Todd Kirby <doubleshot@pacbell.net> |
* |
* 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 "avcodec.h" |
#include "bytestream.h" |
#include "internal.h" |
#include "sgi.h" |
#include "rle.h" |
|
#define SGI_SINGLE_CHAN 2 |
#define SGI_MULTI_CHAN 3 |
|
static av_cold int encode_init(AVCodecContext *avctx) |
{ |
if (avctx->width > 65535 || avctx->height > 65535) { |
av_log(avctx, AV_LOG_ERROR, |
"Unsupported resolution %dx%d.\n", avctx->width, avctx->height); |
av_log(avctx, AV_LOG_ERROR, "SGI does not support resolutions above 65535x65535\n"); |
return AVERROR_INVALIDDATA; |
} |
|
return 0; |
} |
|
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
const AVFrame *frame, int *got_packet) |
{ |
const AVFrame * const p = frame; |
uint8_t *offsettab, *lengthtab, *in_buf, *encode_buf, *buf; |
int x, y, z, length, tablesize, ret; |
unsigned int width, height, depth, dimension; |
unsigned int bytes_per_channel, pixmax, put_be; |
unsigned char *end_buf; |
|
#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 |
|
width = avctx->width; |
height = avctx->height; |
bytes_per_channel = 1; |
pixmax = 0xFF; |
put_be = HAVE_BIGENDIAN; |
|
switch (avctx->pix_fmt) { |
case AV_PIX_FMT_GRAY8: |
dimension = SGI_SINGLE_CHAN; |
depth = SGI_GRAYSCALE; |
break; |
case AV_PIX_FMT_RGB24: |
dimension = SGI_MULTI_CHAN; |
depth = SGI_RGB; |
break; |
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: |
avctx->coder_type = FF_CODER_TYPE_RAW; |
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: |
avctx->coder_type = FF_CODER_TYPE_RAW; |
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: |
avctx->coder_type = FF_CODER_TYPE_RAW; |
bytes_per_channel = 2; |
pixmax = 0xFFFF; |
dimension = SGI_MULTI_CHAN; |
depth = SGI_RGBA; |
break; |
default: |
return AVERROR_INVALIDDATA; |
} |
|
tablesize = depth * height * 4; |
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_packet2(avctx, pkt, bytes_per_channel * length, 0)) < 0) |
return ret; |
buf = pkt->data; |
end_buf = 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, bytes_per_channel); |
bytestream_put_be16(&buf, dimension); |
bytestream_put_be16(&buf, width); |
bytestream_put_be16(&buf, height); |
bytestream_put_be16(&buf, depth); |
|
bytestream_put_be32(&buf, 0L); /* pixmin */ |
bytestream_put_be32(&buf, pixmax); |
bytestream_put_be32(&buf, 0L); /* dummy */ |
|
/* name */ |
memset(buf, 0, SGI_HEADER_SIZE); |
buf += 80; |
|
/* colormap */ |
bytestream_put_be32(&buf, 0L); |
|
/* The rest of the 512 byte header is unused. */ |
buf += 404; |
offsettab = buf; |
|
if (avctx->coder_type != FF_CODER_TYPE_RAW) { |
/* Skip RLE offset table. */ |
buf += tablesize; |
lengthtab = buf; |
|
/* Skip RLE length table. */ |
buf += tablesize; |
|
/* Make an intermediate consecutive buffer. */ |
if (!(encode_buf = av_malloc(width))) |
return AVERROR(ENOMEM); |
|
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 (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; |
} |
|
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 * bytes_per_channel; |
|
for (y = 0; y < height; y++) { |
for (x = 0; x < width * depth; x += depth) |
if (bytes_per_channel == 1) { |
bytestream_put_byte(&buf, in_buf[x]); |
} else { |
if (put_be) { |
bytestream_put_be16(&buf, ((uint16_t *)in_buf)[x]); |
} else { |
bytestream_put_le16(&buf, ((uint16_t *)in_buf)[x]); |
} |
} |
|
in_buf -= p->linesize[0]; |
} |
} |
} |
|
/* total length */ |
pkt->size = buf - pkt->data; |
pkt->flags |= AV_PKT_FLAG_KEY; |
*got_packet = 1; |
|
return 0; |
} |
|
AVCodec ff_sgi_encoder = { |
.name = "sgi", |
.long_name = NULL_IF_CONFIG_SMALL("SGI image"), |
.type = AVMEDIA_TYPE_VIDEO, |
.id = AV_CODEC_ID_SGI, |
.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 |
}, |
}; |