effcedf7 |
/*
* PC Paintbrush PCX (.pcx) image encoder
* Copyright (c) 2009 Daniel Verkamp <daniel at drv.nu>
*
* 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
*/
/** |
ba87f080 |
* @file |
f6f95d4e |
* PCX image encoder |
effcedf7 |
* @author Daniel Verkamp |
bee6d2fd |
* @see http://www.qzx.com/pc-gpe/pcx.txt |
effcedf7 |
*/
#include "avcodec.h"
#include "bytestream.h" |
ad1c5025 |
#include "libavutil/imgutils.h" |
55fd7da1 |
#include "internal.h" |
effcedf7 |
|
13011def |
static const uint32_t monoblack_pal[16] = { 0x000000, 0xFFFFFF }; |
effcedf7 |
static av_cold int pcx_encode_init(AVCodecContext *avctx)
{ |
40cf1bba |
#if FF_API_CODED_FRAME
FF_DISABLE_DEPRECATION_WARNINGS |
863a670e |
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
avctx->coded_frame->key_frame = 1; |
40cf1bba |
FF_ENABLE_DEPRECATION_WARNINGS
#endif |
effcedf7 |
|
863a670e |
return 0;
} |
effcedf7 |
/**
* PCX run-length encoder
* @param dst output buffer
* @param dst_size size of output buffer
* @param src input buffer
* @param src_plane_size size of one plane of input buffer in bytes
* @param nplanes number of planes in input buffer
* @return number of bytes written to dst or -1 on error
* @bug will not work for nplanes != 1 && bpp != 8
*/
static int pcx_rle_encode( uint8_t *dst, int dst_size,
const uint8_t *src, int src_plane_size, int nplanes)
{
int p;
const uint8_t *dst_start = dst;
// check worst-case upper bound on dst_size
if (dst_size < 2LL * src_plane_size * nplanes || src_plane_size <= 0) |
f3b74d94 |
return AVERROR(EINVAL); |
effcedf7 |
for (p = 0; p < nplanes; p++) {
int count = 1;
const uint8_t *src_plane = src + p;
const uint8_t *src_plane_end = src_plane + src_plane_size * nplanes;
uint8_t prev = *src_plane;
src_plane += nplanes;
for (; ; src_plane += nplanes) {
if (src_plane < src_plane_end && *src_plane == prev && count < 0x3F) {
// current byte is same as prev
++count;
} else {
// output prev * count
if (count != 1 || prev >= 0xC0)
*dst++ = 0xC0 | count;
*dst++ = prev;
if (src_plane == src_plane_end)
break;
// start new run
count = 1;
prev = *src_plane;
}
}
}
return dst - dst_start;
}
|
55fd7da1 |
static int pcx_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *frame, int *got_packet) |
effcedf7 |
{ |
55fd7da1 |
const uint8_t *buf_end;
uint8_t *buf; |
effcedf7 |
|
79133fd0 |
int bpp, nplanes, i, y, line_bytes, written, ret, max_pkt_size, sw, sh; |
effcedf7 |
const uint32_t *pal = NULL; |
ad1c5025 |
uint32_t palette256[256]; |
effcedf7 |
const uint8_t *src;
if (avctx->width > 65535 || avctx->height > 65535) {
av_log(avctx, AV_LOG_ERROR, "image dimensions do not fit in 16 bits\n"); |
f3b74d94 |
return AVERROR(EINVAL); |
effcedf7 |
}
switch (avctx->pix_fmt) { |
716d413c |
case AV_PIX_FMT_RGB24: |
effcedf7 |
bpp = 8;
nplanes = 3;
break; |
716d413c |
case AV_PIX_FMT_RGB8:
case AV_PIX_FMT_BGR8:
case AV_PIX_FMT_RGB4_BYTE:
case AV_PIX_FMT_BGR4_BYTE:
case AV_PIX_FMT_GRAY8: |
ad1c5025 |
bpp = 8;
nplanes = 1; |
d6f6a755 |
avpriv_set_systematic_pal2(palette256, avctx->pix_fmt); |
ad1c5025 |
pal = palette256;
break; |
716d413c |
case AV_PIX_FMT_PAL8: |
effcedf7 |
bpp = 8;
nplanes = 1; |
863a670e |
pal = (uint32_t *)frame->data[1]; |
effcedf7 |
break; |
716d413c |
case AV_PIX_FMT_MONOBLACK: |
effcedf7 |
bpp = 1;
nplanes = 1;
pal = monoblack_pal;
break;
default:
av_log(avctx, AV_LOG_ERROR, "unsupported pixfmt\n"); |
f3b74d94 |
return AVERROR(EINVAL); |
effcedf7 |
}
line_bytes = (avctx->width * bpp + 7) >> 3;
line_bytes = (line_bytes + 1) & ~1;
|
55fd7da1 |
max_pkt_size = 128 + avctx->height * 2 * line_bytes * nplanes + (pal ? 256*3 + 1 : 0); |
e36db49b |
if ((ret = ff_alloc_packet2(avctx, pkt, max_pkt_size, 0)) < 0) |
55fd7da1 |
return ret;
buf = pkt->data;
buf_end = pkt->data + pkt->size;
|
79133fd0 |
sw = avctx->sample_aspect_ratio.num;
sh = avctx->sample_aspect_ratio.den;
if (sw > 0xFFFFu || sh > 0xFFFFu)
av_reduce(&sw, &sh, sw, sh, 0xFFFFu);
|
effcedf7 |
bytestream_put_byte(&buf, 10); // manufacturer
bytestream_put_byte(&buf, 5); // version
bytestream_put_byte(&buf, 1); // encoding
bytestream_put_byte(&buf, bpp); // bits per pixel per plane
bytestream_put_le16(&buf, 0); // x min
bytestream_put_le16(&buf, 0); // y min
bytestream_put_le16(&buf, avctx->width - 1); // x max
bytestream_put_le16(&buf, avctx->height - 1); // y max |
79133fd0 |
bytestream_put_le16(&buf, sw); // horizontal DPI
bytestream_put_le16(&buf, sh); // vertical DPI |
effcedf7 |
for (i = 0; i < 16; i++)
bytestream_put_be24(&buf, pal ? pal[i] : 0);// palette (<= 16 color only)
bytestream_put_byte(&buf, 0); // reserved
bytestream_put_byte(&buf, nplanes); // number of planes
bytestream_put_le16(&buf, line_bytes); // scanline plane size in bytes
|
55fd7da1 |
while (buf - pkt->data < 128) |
effcedf7 |
*buf++= 0;
|
863a670e |
src = frame->data[0]; |
effcedf7 |
for (y = 0; y < avctx->height; y++) {
if ((written = pcx_rle_encode(buf, buf_end - buf,
src, line_bytes, nplanes)) < 0) {
av_log(avctx, AV_LOG_ERROR, "buffer too small\n"); |
f3b74d94 |
return AVERROR_BUG; |
effcedf7 |
}
buf += written; |
863a670e |
src += frame->linesize[0]; |
effcedf7 |
}
if (nplanes == 1 && bpp == 8) {
if (buf_end - buf < 257) {
av_log(avctx, AV_LOG_ERROR, "buffer too small\n"); |
f3b74d94 |
return AVERROR_BUG; |
effcedf7 |
}
bytestream_put_byte(&buf, 12);
for (i = 0; i < 256; i++) {
bytestream_put_be24(&buf, pal[i]);
}
}
|
55fd7da1 |
pkt->size = buf - pkt->data;
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
return 0; |
effcedf7 |
}
|
e7e2df27 |
AVCodec ff_pcx_encoder = { |
ec6402b7 |
.name = "pcx", |
b2bed932 |
.long_name = NULL_IF_CONFIG_SMALL("PC Paintbrush PCX image"), |
ec6402b7 |
.type = AVMEDIA_TYPE_VIDEO, |
36ef5369 |
.id = AV_CODEC_ID_PCX, |
ec6402b7 |
.init = pcx_encode_init, |
55fd7da1 |
.encode2 = pcx_encode_frame, |
716d413c |
.pix_fmts = (const enum AVPixelFormat[]){
AV_PIX_FMT_RGB24,
AV_PIX_FMT_RGB8, AV_PIX_FMT_BGR8, AV_PIX_FMT_RGB4_BYTE, AV_PIX_FMT_BGR4_BYTE,
AV_PIX_FMT_GRAY8, AV_PIX_FMT_PAL8,
AV_PIX_FMT_MONOBLACK,
AV_PIX_FMT_NONE |
00c3b67b |
}, |
effcedf7 |
}; |