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4243da4ff4
This is possible, because every given FFCodec has to implement exactly one of these. Doing so decreases sizeof(FFCodec) and therefore decreases the size of the binary. Notice that in case of position-independent code the decrease is in .data.rel.ro, so that this translates to decreased memory consumption. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
247 lines
8.9 KiB
C
247 lines
8.9 KiB
C
/*
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* XWD image format
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*
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* Copyright (c) 2012 Paul B Mahol
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/pixdesc.h"
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#include "avcodec.h"
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#include "bytestream.h"
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#include "codec_internal.h"
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#include "encode.h"
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#include "xwd.h"
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#define WINDOW_NAME "lavcxwdenc"
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#define WINDOW_NAME_SIZE 11
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static int xwd_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *pict, int *got_packet)
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{
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enum AVPixelFormat pix_fmt = avctx->pix_fmt;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
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uint32_t pixdepth, bpp, bpad, ncolors = 0, lsize, vclass, be = 0;
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uint32_t rgb[3] = { 0 }, bitorder = 0;
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uint32_t header_size;
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int i, out_size, ret;
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uint8_t *ptr, *buf;
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AVFrame * const p = (AVFrame *)pict;
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uint32_t pal[256];
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pixdepth = av_get_bits_per_pixel(desc);
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if (desc->flags & AV_PIX_FMT_FLAG_BE)
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be = 1;
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switch (pix_fmt) {
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case AV_PIX_FMT_ARGB:
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case AV_PIX_FMT_BGRA:
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case AV_PIX_FMT_RGBA:
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case AV_PIX_FMT_ABGR:
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if (pix_fmt == AV_PIX_FMT_ARGB ||
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pix_fmt == AV_PIX_FMT_ABGR)
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be = 1;
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if (pix_fmt == AV_PIX_FMT_ABGR ||
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pix_fmt == AV_PIX_FMT_RGBA) {
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rgb[0] = 0xFF;
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rgb[1] = 0xFF00;
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rgb[2] = 0xFF0000;
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} else {
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rgb[0] = 0xFF0000;
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rgb[1] = 0xFF00;
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rgb[2] = 0xFF;
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}
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bpp = 32;
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pixdepth = 24;
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vclass = XWD_TRUE_COLOR;
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bpad = 32;
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break;
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case AV_PIX_FMT_BGR24:
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case AV_PIX_FMT_RGB24:
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if (pix_fmt == AV_PIX_FMT_RGB24)
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be = 1;
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bpp = 24;
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vclass = XWD_TRUE_COLOR;
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bpad = 32;
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rgb[0] = 0xFF0000;
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rgb[1] = 0xFF00;
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rgb[2] = 0xFF;
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break;
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case AV_PIX_FMT_RGB565LE:
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case AV_PIX_FMT_RGB565BE:
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case AV_PIX_FMT_BGR565LE:
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case AV_PIX_FMT_BGR565BE:
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if (pix_fmt == AV_PIX_FMT_BGR565LE ||
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pix_fmt == AV_PIX_FMT_BGR565BE) {
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rgb[0] = 0x1F;
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rgb[1] = 0x7E0;
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rgb[2] = 0xF800;
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} else {
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rgb[0] = 0xF800;
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rgb[1] = 0x7E0;
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rgb[2] = 0x1F;
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}
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bpp = 16;
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vclass = XWD_TRUE_COLOR;
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bpad = 16;
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break;
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case AV_PIX_FMT_RGB555LE:
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case AV_PIX_FMT_RGB555BE:
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case AV_PIX_FMT_BGR555LE:
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case AV_PIX_FMT_BGR555BE:
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if (pix_fmt == AV_PIX_FMT_BGR555LE ||
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pix_fmt == AV_PIX_FMT_BGR555BE) {
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rgb[0] = 0x1F;
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rgb[1] = 0x3E0;
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rgb[2] = 0x7C00;
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} else {
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rgb[0] = 0x7C00;
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rgb[1] = 0x3E0;
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rgb[2] = 0x1F;
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}
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bpp = 16;
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vclass = XWD_TRUE_COLOR;
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bpad = 16;
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break;
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case AV_PIX_FMT_RGB8:
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case AV_PIX_FMT_BGR8:
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case AV_PIX_FMT_RGB4_BYTE:
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case AV_PIX_FMT_BGR4_BYTE:
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case AV_PIX_FMT_PAL8:
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bpp = 8;
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vclass = XWD_PSEUDO_COLOR;
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bpad = 8;
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ncolors = 256;
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break;
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case AV_PIX_FMT_GRAY8:
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bpp = 8;
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bpad = 8;
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vclass = XWD_STATIC_GRAY;
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break;
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case AV_PIX_FMT_MONOWHITE:
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be = 1;
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bitorder = 1;
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bpp = 1;
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bpad = 8;
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vclass = XWD_STATIC_GRAY;
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break;
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default:
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av_log(avctx, AV_LOG_ERROR, "unsupported pixel format\n");
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return AVERROR(EINVAL);
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}
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lsize = FFALIGN(bpp * avctx->width, bpad) / 8;
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header_size = XWD_HEADER_SIZE + WINDOW_NAME_SIZE;
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out_size = header_size + ncolors * XWD_CMAP_SIZE + avctx->height * lsize;
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if ((ret = ff_get_encode_buffer(avctx, pkt, out_size, 0)) < 0)
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return ret;
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buf = pkt->data;
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p->key_frame = 1;
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p->pict_type = AV_PICTURE_TYPE_I;
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bytestream_put_be32(&buf, header_size);
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bytestream_put_be32(&buf, XWD_VERSION); // file version
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bytestream_put_be32(&buf, XWD_Z_PIXMAP); // pixmap format
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bytestream_put_be32(&buf, pixdepth); // pixmap depth in pixels
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bytestream_put_be32(&buf, avctx->width); // pixmap width in pixels
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bytestream_put_be32(&buf, avctx->height); // pixmap height in pixels
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bytestream_put_be32(&buf, 0); // bitmap x offset
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bytestream_put_be32(&buf, be); // byte order
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bytestream_put_be32(&buf, 32); // bitmap unit
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bytestream_put_be32(&buf, bitorder); // bit-order of image data
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bytestream_put_be32(&buf, bpad); // bitmap scan-line pad in bits
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bytestream_put_be32(&buf, bpp); // bits per pixel
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bytestream_put_be32(&buf, lsize); // bytes per scan-line
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bytestream_put_be32(&buf, vclass); // visual class
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bytestream_put_be32(&buf, rgb[0]); // red mask
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bytestream_put_be32(&buf, rgb[1]); // green mask
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bytestream_put_be32(&buf, rgb[2]); // blue mask
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bytestream_put_be32(&buf, 8); // size of each bitmask in bits
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bytestream_put_be32(&buf, ncolors); // number of colors
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bytestream_put_be32(&buf, ncolors); // number of entries in color map
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bytestream_put_be32(&buf, avctx->width); // window width
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bytestream_put_be32(&buf, avctx->height); // window height
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bytestream_put_be32(&buf, 0); // window upper left X coordinate
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bytestream_put_be32(&buf, 0); // window upper left Y coordinate
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bytestream_put_be32(&buf, 0); // window border width
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bytestream_put_buffer(&buf, WINDOW_NAME, WINDOW_NAME_SIZE);
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if (pix_fmt == AV_PIX_FMT_PAL8) {
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memcpy(pal, p->data[1], sizeof(pal));
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} else {
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avpriv_set_systematic_pal2(pal, pix_fmt);
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}
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for (i = 0; i < ncolors; i++) {
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uint32_t val;
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uint8_t red, green, blue;
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val = pal[i];
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red = (val >> 16) & 0xFF;
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green = (val >> 8) & 0xFF;
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blue = val & 0xFF;
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bytestream_put_be32(&buf, i); // colormap entry number
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bytestream_put_be16(&buf, red << 8);
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bytestream_put_be16(&buf, green << 8);
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bytestream_put_be16(&buf, blue << 8);
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bytestream_put_byte(&buf, 0x7); // bitmask flag
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bytestream_put_byte(&buf, 0); // padding
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}
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ptr = p->data[0];
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for (i = 0; i < avctx->height; i++) {
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bytestream_put_buffer(&buf, ptr, lsize);
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ptr += p->linesize[0];
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}
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*got_packet = 1;
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return 0;
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}
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const FFCodec ff_xwd_encoder = {
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.p.name = "xwd",
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.p.long_name = NULL_IF_CONFIG_SMALL("XWD (X Window Dump) image"),
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_XWD,
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.p.capabilities = AV_CODEC_CAP_DR1,
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FF_CODEC_ENCODE_CB(xwd_encode_frame),
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.p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_BGRA,
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AV_PIX_FMT_RGBA,
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AV_PIX_FMT_ARGB,
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AV_PIX_FMT_ABGR,
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AV_PIX_FMT_RGB24,
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AV_PIX_FMT_BGR24,
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AV_PIX_FMT_RGB565BE,
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AV_PIX_FMT_RGB565LE,
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AV_PIX_FMT_BGR565BE,
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AV_PIX_FMT_BGR565LE,
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AV_PIX_FMT_RGB555BE,
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AV_PIX_FMT_RGB555LE,
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AV_PIX_FMT_BGR555BE,
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AV_PIX_FMT_BGR555LE,
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AV_PIX_FMT_RGB8,
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AV_PIX_FMT_BGR8,
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AV_PIX_FMT_RGB4_BYTE,
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AV_PIX_FMT_BGR4_BYTE,
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AV_PIX_FMT_PAL8,
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AV_PIX_FMT_GRAY8,
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AV_PIX_FMT_MONOWHITE,
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AV_PIX_FMT_NONE },
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};
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