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FFmpeg/libavcodec/qdrw.c
Andreas Rheinhardt a247ac640d avcodec: Constify AVCodecs 
Given that the AVCodec.next pointer has now been removed, most of the
AVCodecs are not modified at all any more and can therefore be made
const (as this patch does); the only exceptions are the very few codecs
for external libraries that have a init_static_data callback.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
2021-04-27 10:43:15 -03:00

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/*
* QuickDraw (qdrw) codec
* Copyright (c) 2004 Konstantin Shishkov
* Copyright (c) 2015 Vittorio Giovara
*
* 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
*/
/**
* @file
* Apple QuickDraw codec.
* https://developer.apple.com/legacy/library/documentation/mac/QuickDraw/QuickDraw-461.html
*/
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"
enum QuickdrawOpcodes {
CLIP = 0x0001,
PACKBITSRECT = 0x0098,
PACKBITSRGN,
DIRECTBITSRECT,
DIRECTBITSRGN,
SHORTCOMMENT = 0x00A0,
LONGCOMMENT,
EOP = 0x00FF,
};
static int parse_palette(AVCodecContext *avctx, GetByteContext *gbc,
uint32_t *pal, int colors, int pixmap)
{
int i;
for (i = 0; i <= colors; i++) {
uint8_t r, g, b;
unsigned int idx = bytestream2_get_be16(gbc); /* color index */
if (idx > 255 && !pixmap) {
av_log(avctx, AV_LOG_WARNING,
"Palette index out of range: %u\n", idx);
bytestream2_skip(gbc, 6);
continue;
}
if (avctx->pix_fmt != AV_PIX_FMT_PAL8)
return AVERROR_INVALIDDATA;
r = bytestream2_get_byte(gbc);
bytestream2_skip(gbc, 1);
g = bytestream2_get_byte(gbc);
bytestream2_skip(gbc, 1);
b = bytestream2_get_byte(gbc);
bytestream2_skip(gbc, 1);
pal[pixmap ? i : idx] = (0xFFU << 24) | (r << 16) | (g << 8) | b;
}
return 0;
}
static int decode_rle_bpp2(AVCodecContext *avctx, AVFrame *p, GetByteContext *gbc)
{
int offset = avctx->width;
uint8_t *outdata = p->data[0];
int i, j;
for (i = 0; i < avctx->height; i++) {
int size, left, code, pix;
uint8_t *out = outdata;
int pos = 0;
/* size of packed line */
if (offset / 4 > 200)
size = left = bytestream2_get_be16(gbc);
else
size = left = bytestream2_get_byte(gbc);
if (bytestream2_get_bytes_left(gbc) < size)
return AVERROR_INVALIDDATA;
/* decode line */
while (left > 0) {
code = bytestream2_get_byte(gbc);
if (code & 0x80 ) { /* run */
pix = bytestream2_get_byte(gbc);
for (j = 0; j < 257 - code; j++) {
if (pos < offset)
out[pos++] = (pix & 0xC0) >> 6;
if (pos < offset)
out[pos++] = (pix & 0x30) >> 4;
if (pos < offset)
out[pos++] = (pix & 0x0C) >> 2;
if (pos < offset)
out[pos++] = (pix & 0x03);
}
left -= 2;
} else { /* copy */
for (j = 0; j < code + 1; j++) {
pix = bytestream2_get_byte(gbc);
if (pos < offset)
out[pos++] = (pix & 0xC0) >> 6;
if (pos < offset)
out[pos++] = (pix & 0x30) >> 4;
if (pos < offset)
out[pos++] = (pix & 0x0C) >> 2;
if (pos < offset)
out[pos++] = (pix & 0x03);
}
left -= 1 + (code + 1);
}
}
outdata += p->linesize[0];
}
return 0;
}
static int decode_rle_bpp4(AVCodecContext *avctx, AVFrame *p, GetByteContext *gbc)
{
int offset = avctx->width;
uint8_t *outdata = p->data[0];
int i, j;
for (i = 0; i < avctx->height; i++) {
int size, left, code, pix;
uint8_t *out = outdata;
int pos = 0;
/* size of packed line */
size = left = bytestream2_get_be16(gbc);
if (bytestream2_get_bytes_left(gbc) < size)
return AVERROR_INVALIDDATA;
/* decode line */
while (left > 0) {
code = bytestream2_get_byte(gbc);
if (code & 0x80 ) { /* run */
pix = bytestream2_get_byte(gbc);
for (j = 0; j < 257 - code; j++) {
if (pos < offset)
out[pos++] = (pix & 0xF0) >> 4;
if (pos < offset)
out[pos++] = pix & 0xF;
}
left -= 2;
} else { /* copy */
for (j = 0; j < code + 1; j++) {
pix = bytestream2_get_byte(gbc);
if (pos < offset)
out[pos++] = (pix & 0xF0) >> 4;
if (pos < offset)
out[pos++] = pix & 0xF;
}
left -= 1 + (code + 1);
}
}
outdata += p->linesize[0];
}
return 0;
}
static int decode_rle16(AVCodecContext *avctx, AVFrame *p, GetByteContext *gbc)
{
int offset = avctx->width;
uint8_t *outdata = p->data[0];
int i, j;
for (i = 0; i < avctx->height; i++) {
int size, left, code, pix;
uint16_t *out = (uint16_t *)outdata;
int pos = 0;
/* size of packed line */
size = left = bytestream2_get_be16(gbc);
if (bytestream2_get_bytes_left(gbc) < size)
return AVERROR_INVALIDDATA;
/* decode line */
while (left > 0) {
code = bytestream2_get_byte(gbc);
if (code & 0x80 ) { /* run */
pix = bytestream2_get_be16(gbc);
for (j = 0; j < 257 - code; j++) {
if (pos < offset) {
out[pos++] = pix;
}
}
left -= 3;
} else { /* copy */
for (j = 0; j < code + 1; j++) {
if (pos < offset) {
out[pos++] = bytestream2_get_be16(gbc);
} else {
bytestream2_skip(gbc, 2);
}
}
left -= 1 + (code + 1) * 2;
}
}
outdata += p->linesize[0];
}
return 0;
}
static int decode_rle(AVCodecContext *avctx, AVFrame *p, GetByteContext *gbc,
int step)
{
int i, j;
int offset = avctx->width * step;
uint8_t *outdata = p->data[0];
for (i = 0; i < avctx->height; i++) {
int size, left, code, pix;
uint8_t *out = outdata;
int pos = 0;
/* size of packed line */
size = left = bytestream2_get_be16(gbc);
if (bytestream2_get_bytes_left(gbc) < size)
return AVERROR_INVALIDDATA;
/* decode line */
while (left > 0) {
code = bytestream2_get_byte(gbc);
if (code & 0x80 ) { /* run */
pix = bytestream2_get_byte(gbc);
for (j = 0; j < 257 - code; j++) {
if (pos < offset)
out[pos] = pix;
pos += step;
if (pos >= offset && step > 1) {
pos -= offset;
pos++;
}
}
left -= 2;
} else { /* copy */
for (j = 0; j < code + 1; j++) {
pix = bytestream2_get_byte(gbc);
if (pos < offset)
out[pos] = pix;
pos += step;
if (pos >= offset && step > 1) {
pos -= offset;
pos++;
}
}
left -= 2 + code;
}
}
outdata += p->linesize[0];
}
return 0;
}
static int check_header(const char *buf, int buf_size)
{
unsigned w, h, v0, v1;
if (buf_size < 40)
return 0;
w = AV_RB16(buf+6);
h = AV_RB16(buf+8);
v0 = AV_RB16(buf+10);
v1 = AV_RB16(buf+12);
if (!w || !h)
return 0;
if (v0 == 0x1101)
return 1;
if (v0 == 0x0011 && v1 == 0x02FF)
return 2;
return 0;
}
static int decode_frame(AVCodecContext *avctx,
void *data, int *got_frame,
AVPacket *avpkt)
{
AVFrame * const p = data;
GetByteContext gbc;
int colors;
int w, h, ret;
int ver;
bytestream2_init(&gbc, avpkt->data, avpkt->size);
if ( bytestream2_get_bytes_left(&gbc) >= 552
&& check_header(gbc.buffer + 512, bytestream2_get_bytes_left(&gbc) - 512)
)
bytestream2_skip(&gbc, 512);
ver = check_header(gbc.buffer, bytestream2_get_bytes_left(&gbc));
/* smallest PICT header */
if (bytestream2_get_bytes_left(&gbc) < 40) {
av_log(avctx, AV_LOG_ERROR, "Frame is too small %d\n",
bytestream2_get_bytes_left(&gbc));
return AVERROR_INVALIDDATA;
}
bytestream2_skip(&gbc, 6);
h = bytestream2_get_be16(&gbc);
w = bytestream2_get_be16(&gbc);
ret = ff_set_dimensions(avctx, w, h);
if (ret < 0)
return ret;
/* version 1 is identified by 0x1101
* it uses byte-aligned opcodes rather than word-aligned */
if (ver == 1) {
avpriv_request_sample(avctx, "QuickDraw version 1");
return AVERROR_PATCHWELCOME;
} else if (ver != 2) {
avpriv_request_sample(avctx, "QuickDraw version unknown (%X)", bytestream2_get_be32(&gbc));
return AVERROR_PATCHWELCOME;
}
bytestream2_skip(&gbc, 4+26);
while (bytestream2_get_bytes_left(&gbc) >= 4) {
int bppcnt, bpp;
int rowbytes, pack_type;
int flags;
int opcode = bytestream2_get_be16(&gbc);
switch(opcode) {
case CLIP:
bytestream2_skip(&gbc, 10);
break;
case PACKBITSRECT:
case PACKBITSRGN:
av_log(avctx, AV_LOG_DEBUG, "Parsing Packbit opcode\n");
flags = bytestream2_get_be16(&gbc) & 0xC000;
bytestream2_skip(&gbc, 28);
bppcnt = bytestream2_get_be16(&gbc); /* cmpCount */
bpp = bytestream2_get_be16(&gbc); /* cmpSize */
av_log(avctx, AV_LOG_DEBUG, "bppcount %d bpp %d\n", bppcnt, bpp);
if (bppcnt == 1 && bpp == 8) {
avctx->pix_fmt = AV_PIX_FMT_PAL8;
} else if (bppcnt == 1 && (bpp == 4 || bpp == 2)) {
avctx->pix_fmt = AV_PIX_FMT_PAL8;
} else if (bppcnt == 3 && bpp == 5) {
avctx->pix_fmt = AV_PIX_FMT_RGB555;
} else {
av_log(avctx, AV_LOG_ERROR,
"Invalid pixel format (bppcnt %d bpp %d) in Packbit\n",
bppcnt, bpp);
return AVERROR_INVALIDDATA;
}
/* jump to palette */
bytestream2_skip(&gbc, 18);
colors = bytestream2_get_be16(&gbc);
if (colors < 0 || colors > 256) {
av_log(avctx, AV_LOG_ERROR,
"Error color count - %i(0x%X)\n", colors, colors);
return AVERROR_INVALIDDATA;
}
if (bytestream2_get_bytes_left(&gbc) < (colors + 1) * 8) {
av_log(avctx, AV_LOG_ERROR, "Palette is too small %d\n",
bytestream2_get_bytes_left(&gbc));
return AVERROR_INVALIDDATA;
}
if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
return ret;
ret = parse_palette(avctx, &gbc, (uint32_t *)p->data[1], colors, flags & 0x8000);
if (ret < 0)
return ret;
p->palette_has_changed = 1;
/* jump to image data */
bytestream2_skip(&gbc, 18);
if (opcode == PACKBITSRGN) {
bytestream2_skip(&gbc, 2 + 8); /* size + rect */
avpriv_report_missing_feature(avctx, "Packbit mask region");
}
if (avctx->pix_fmt == AV_PIX_FMT_RGB555)
ret = decode_rle16(avctx, p, &gbc);
else if (bpp == 2)
ret = decode_rle_bpp2(avctx, p, &gbc);
else if (bpp == 4)
ret = decode_rle_bpp4(avctx, p, &gbc);
else
ret = decode_rle(avctx, p, &gbc, bppcnt);
if (ret < 0)
return ret;
*got_frame = 1;
break;
case DIRECTBITSRECT:
case DIRECTBITSRGN:
av_log(avctx, AV_LOG_DEBUG, "Parsing Directbit opcode\n");
bytestream2_skip(&gbc, 4);
rowbytes = bytestream2_get_be16(&gbc) & 0x3FFF;
if (rowbytes <= 250) {
avpriv_report_missing_feature(avctx, "Short rowbytes");
return AVERROR_PATCHWELCOME;
}
bytestream2_skip(&gbc, 4);
h = bytestream2_get_be16(&gbc);
w = bytestream2_get_be16(&gbc);
bytestream2_skip(&gbc, 2);
ret = ff_set_dimensions(avctx, w, h);
if (ret < 0)
return ret;
pack_type = bytestream2_get_be16(&gbc);
bytestream2_skip(&gbc, 16);
bppcnt = bytestream2_get_be16(&gbc); /* cmpCount */
bpp = bytestream2_get_be16(&gbc); /* cmpSize */
av_log(avctx, AV_LOG_DEBUG, "bppcount %d bpp %d\n", bppcnt, bpp);
if (bppcnt == 3 && bpp == 8) {
avctx->pix_fmt = AV_PIX_FMT_RGB24;
} else if (bppcnt == 3 && bpp == 5 || bppcnt == 2 && bpp == 8) {
avctx->pix_fmt = AV_PIX_FMT_RGB555;
} else if (bppcnt == 4 && bpp == 8) {
avctx->pix_fmt = AV_PIX_FMT_ARGB;
} else {
av_log(avctx, AV_LOG_ERROR,
"Invalid pixel format (bppcnt %d bpp %d) in Directbit\n",
bppcnt, bpp);
return AVERROR_INVALIDDATA;
}
/* set packing when default is selected */
if (pack_type == 0)
pack_type = bppcnt;
if (pack_type != 3 && pack_type != 4) {
avpriv_request_sample(avctx, "Pack type %d", pack_type);
return AVERROR_PATCHWELCOME;
}
if (bytestream2_get_bytes_left(&gbc) < 30)
return AVERROR_INVALIDDATA;
if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
return ret;
/* jump to data */
bytestream2_skip(&gbc, 30);
if (opcode == DIRECTBITSRGN) {
bytestream2_skip(&gbc, 2 + 8); /* size + rect */
avpriv_report_missing_feature(avctx, "DirectBit mask region");
}
if (avctx->pix_fmt == AV_PIX_FMT_RGB555)
ret = decode_rle16(avctx, p, &gbc);
else
ret = decode_rle(avctx, p, &gbc, bppcnt);
if (ret < 0)
return ret;
*got_frame = 1;
break;
case LONGCOMMENT:
bytestream2_get_be16(&gbc);
bytestream2_skip(&gbc, bytestream2_get_be16(&gbc));
break;
default:
av_log(avctx, AV_LOG_TRACE, "Unknown 0x%04X opcode\n", opcode);
break;
}
/* exit the loop when a known pixel block has been found */
if (*got_frame) {
int eop, trail;
/* re-align to a word */
bytestream2_skip(&gbc, bytestream2_get_bytes_left(&gbc) % 2);
eop = bytestream2_get_be16(&gbc);
trail = bytestream2_get_bytes_left(&gbc);
if (eop != EOP)
av_log(avctx, AV_LOG_WARNING,
"Missing end of picture opcode (found 0x%04X)\n", eop);
if (trail)
av_log(avctx, AV_LOG_WARNING, "Got %d trailing bytes\n", trail);
break;
}
}
if (*got_frame) {
p->pict_type = AV_PICTURE_TYPE_I;
p->key_frame = 1;
return avpkt->size;
} else {
av_log(avctx, AV_LOG_ERROR, "Frame contained no usable data\n");
return AVERROR_INVALIDDATA;
}
}
const AVCodec ff_qdraw_decoder = {
.name = "qdraw",
.long_name = NULL_IF_CONFIG_SMALL("Apple QuickDraw"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_QDRAW,
.decode = decode_frame,
.capabilities = AV_CODEC_CAP_DR1,
};
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