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https://github.com/FFmpeg/FFmpeg.git
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348 lines
11 KiB
C
348 lines
11 KiB
C
/*
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* QuickDraw (qdrw) codec
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* Copyright (c) 2004 Konstantin Shishkov
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* Copyright (c) 2015 Vittorio Giovara
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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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/**
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* @file
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* Apple QuickDraw codec.
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* https://developer.apple.com/legacy/library/documentation/mac/QuickDraw/QuickDraw-461.html
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*/
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#include "libavutil/common.h"
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#include "libavutil/intreadwrite.h"
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#include "avcodec.h"
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#include "bytestream.h"
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#include "internal.h"
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enum QuickdrawOpcodes {
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PACKBITSRECT = 0x0098,
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PACKBITSRGN,
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DIRECTBITSRECT,
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DIRECTBITSRGN,
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SHORTCOMMENT = 0x00A0,
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LONGCOMMENT,
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EOP = 0x00FF,
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};
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static int parse_palette(AVCodecContext *avctx, GetByteContext *gbc,
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uint32_t *pal, int colors)
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{
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int i;
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for (i = 0; i <= colors; i++) {
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uint8_t r, g, b;
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unsigned int idx = bytestream2_get_be16(gbc); /* color index */
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if (idx > 255) {
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av_log(avctx, AV_LOG_WARNING,
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"Palette index out of range: %u\n", idx);
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bytestream2_skip(gbc, 6);
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continue;
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}
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r = bytestream2_get_byte(gbc);
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bytestream2_skip(gbc, 1);
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g = bytestream2_get_byte(gbc);
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bytestream2_skip(gbc, 1);
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b = bytestream2_get_byte(gbc);
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bytestream2_skip(gbc, 1);
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pal[idx] = (0xFFU << 24) | (r << 16) | (g << 8) | b;
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}
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return 0;
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}
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static int decode_rle(AVCodecContext *avctx, AVFrame *p, GetByteContext *gbc,
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int step)
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{
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int i, j;
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int offset = avctx->width * step;
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uint8_t *outdata = p->data[0];
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for (i = 0; i < avctx->height; i++) {
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int size, left, code, pix;
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uint8_t *out = outdata;
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int pos = 0;
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/* size of packed line */
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size = left = bytestream2_get_be16(gbc);
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if (bytestream2_get_bytes_left(gbc) < size)
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return AVERROR_INVALIDDATA;
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/* decode line */
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while (left > 0) {
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code = bytestream2_get_byte(gbc);
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if (code & 0x80 ) { /* run */
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pix = bytestream2_get_byte(gbc);
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for (j = 0; j < 257 - code; j++) {
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out[pos] = pix;
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pos += step;
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if (pos >= offset) {
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pos -= offset;
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pos++;
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}
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if (pos >= offset)
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return AVERROR_INVALIDDATA;
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}
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left -= 2;
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} else { /* copy */
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for (j = 0; j < code + 1; j++) {
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out[pos] = bytestream2_get_byte(gbc);
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pos += step;
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if (pos >= offset) {
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pos -= offset;
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pos++;
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}
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if (pos >= offset)
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return AVERROR_INVALIDDATA;
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}
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left -= 2 + code;
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}
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}
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outdata += p->linesize[0];
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}
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return 0;
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}
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static int check_header(const char *buf, int buf_size)
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{
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unsigned w, h, v0, v1;
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if (buf_size < 40)
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return 0;
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w = AV_RB16(buf+6);
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h = AV_RB16(buf+8);
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v0 = AV_RB16(buf+10);
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v1 = AV_RB16(buf+12);
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if (!w || !h)
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return 0;
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if (v0 == 0x1101)
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return 1;
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if (v0 == 0x0011 && v1 == 0x02FF)
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return 2;
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return 0;
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}
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static int decode_frame(AVCodecContext *avctx,
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void *data, int *got_frame,
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AVPacket *avpkt)
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{
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AVFrame * const p = data;
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GetByteContext gbc;
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int colors;
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int w, h, ret;
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int ver;
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bytestream2_init(&gbc, avpkt->data, avpkt->size);
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if ( bytestream2_get_bytes_left(&gbc) >= 552
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&& check_header(gbc.buffer + 512, bytestream2_get_bytes_left(&gbc) - 512)
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)
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bytestream2_skip(&gbc, 512);
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ver = check_header(gbc.buffer, bytestream2_get_bytes_left(&gbc));
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/* smallest PICT header */
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if (bytestream2_get_bytes_left(&gbc) < 40) {
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av_log(avctx, AV_LOG_ERROR, "Frame is too small %d\n",
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bytestream2_get_bytes_left(&gbc));
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return AVERROR_INVALIDDATA;
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}
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bytestream2_skip(&gbc, 6);
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h = bytestream2_get_be16(&gbc);
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w = bytestream2_get_be16(&gbc);
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ret = ff_set_dimensions(avctx, w, h);
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if (ret < 0)
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return ret;
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/* version 1 is identified by 0x1101
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* it uses byte-aligned opcodes rather than word-aligned */
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if (ver == 1) {
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avpriv_request_sample(avctx, "QuickDraw version 1");
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return AVERROR_PATCHWELCOME;
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} else if (ver != 2) {
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avpriv_request_sample(avctx, "QuickDraw version unknown (%X)", bytestream2_get_be32(&gbc));
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return AVERROR_PATCHWELCOME;
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}
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bytestream2_skip(&gbc, 4+26);
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while (bytestream2_get_bytes_left(&gbc) >= 4) {
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int bppcnt, bpp;
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int rowbytes, pack_type;
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int opcode = bytestream2_get_be16(&gbc);
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switch(opcode) {
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case PACKBITSRECT:
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case PACKBITSRGN:
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av_log(avctx, AV_LOG_DEBUG, "Parsing Packbit opcode\n");
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bytestream2_skip(&gbc, 30);
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bppcnt = bytestream2_get_be16(&gbc); /* cmpCount */
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bpp = bytestream2_get_be16(&gbc); /* cmpSize */
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av_log(avctx, AV_LOG_DEBUG, "bppcount %d bpp %d\n", bppcnt, bpp);
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if (bppcnt == 1 && bpp == 8) {
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avctx->pix_fmt = AV_PIX_FMT_PAL8;
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} else {
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av_log(avctx, AV_LOG_ERROR,
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"Invalid pixel format (bppcnt %d bpp %d) in Packbit\n",
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bppcnt, bpp);
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return AVERROR_INVALIDDATA;
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}
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/* jump to palette */
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bytestream2_skip(&gbc, 18);
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colors = bytestream2_get_be16(&gbc);
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if (colors < 0 || colors > 256) {
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av_log(avctx, AV_LOG_ERROR,
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"Error color count - %i(0x%X)\n", colors, colors);
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return AVERROR_INVALIDDATA;
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}
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if (bytestream2_get_bytes_left(&gbc) < (colors + 1) * 8) {
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av_log(avctx, AV_LOG_ERROR, "Palette is too small %d\n",
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bytestream2_get_bytes_left(&gbc));
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return AVERROR_INVALIDDATA;
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}
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if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
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return ret;
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parse_palette(avctx, &gbc, (uint32_t *)p->data[1], colors);
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p->palette_has_changed = 1;
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/* jump to image data */
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bytestream2_skip(&gbc, 18);
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if (opcode == PACKBITSRGN) {
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bytestream2_skip(&gbc, 2 + 8); /* size + rect */
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avpriv_report_missing_feature(avctx, "Packbit mask region");
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}
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ret = decode_rle(avctx, p, &gbc, bppcnt);
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if (ret < 0)
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return ret;
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*got_frame = 1;
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break;
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case DIRECTBITSRECT:
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case DIRECTBITSRGN:
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av_log(avctx, AV_LOG_DEBUG, "Parsing Directbit opcode\n");
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bytestream2_skip(&gbc, 4);
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rowbytes = bytestream2_get_be16(&gbc) & 0x3FFF;
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if (rowbytes <= 250) {
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avpriv_report_missing_feature(avctx, "Short rowbytes");
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return AVERROR_PATCHWELCOME;
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}
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bytestream2_skip(&gbc, 10);
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pack_type = bytestream2_get_be16(&gbc);
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bytestream2_skip(&gbc, 16);
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bppcnt = bytestream2_get_be16(&gbc); /* cmpCount */
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bpp = bytestream2_get_be16(&gbc); /* cmpSize */
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av_log(avctx, AV_LOG_DEBUG, "bppcount %d bpp %d\n", bppcnt, bpp);
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if (bppcnt == 3 && bpp == 8) {
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avctx->pix_fmt = AV_PIX_FMT_RGB24;
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} else if (bppcnt == 4 && bpp == 8) {
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avctx->pix_fmt = AV_PIX_FMT_ARGB;
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} else {
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av_log(avctx, AV_LOG_ERROR,
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"Invalid pixel format (bppcnt %d bpp %d) in Directbit\n",
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bppcnt, bpp);
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return AVERROR_INVALIDDATA;
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}
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/* set packing when default is selected */
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if (pack_type == 0)
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pack_type = bppcnt;
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if (pack_type != 3 && pack_type != 4) {
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avpriv_request_sample(avctx, "Pack type %d", pack_type);
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return AVERROR_PATCHWELCOME;
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}
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if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
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return ret;
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/* jump to data */
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bytestream2_skip(&gbc, 30);
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if (opcode == DIRECTBITSRGN) {
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bytestream2_skip(&gbc, 2 + 8); /* size + rect */
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avpriv_report_missing_feature(avctx, "DirectBit mask region");
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}
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ret = decode_rle(avctx, p, &gbc, bppcnt);
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if (ret < 0)
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return ret;
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*got_frame = 1;
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break;
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case LONGCOMMENT:
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bytestream2_get_be16(&gbc);
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bytestream2_skip(&gbc, bytestream2_get_be16(&gbc));
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break;
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default:
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av_log(avctx, AV_LOG_TRACE, "Unknown 0x%04X opcode\n", opcode);
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break;
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}
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/* exit the loop when a known pixel block has been found */
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if (*got_frame) {
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int eop, trail;
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/* re-align to a word */
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bytestream2_skip(&gbc, bytestream2_get_bytes_left(&gbc) % 2);
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eop = bytestream2_get_be16(&gbc);
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trail = bytestream2_get_bytes_left(&gbc);
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if (eop != EOP)
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av_log(avctx, AV_LOG_WARNING,
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"Missing end of picture opcode (found 0x%04X)\n", eop);
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if (trail)
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av_log(avctx, AV_LOG_WARNING, "Got %d trailing bytes\n", trail);
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break;
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}
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}
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if (*got_frame) {
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p->pict_type = AV_PICTURE_TYPE_I;
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p->key_frame = 1;
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return avpkt->size;
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} else {
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av_log(avctx, AV_LOG_ERROR, "Frame contained no usable data\n");
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return AVERROR_INVALIDDATA;
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}
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}
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AVCodec ff_qdraw_decoder = {
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.name = "qdraw",
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.long_name = NULL_IF_CONFIG_SMALL("Apple QuickDraw"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_QDRAW,
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.decode = decode_frame,
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.capabilities = AV_CODEC_CAP_DR1,
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};
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