/*
* QuickDraw (qdrw) codec
* Copyright (c) 2004 Konstantin Shishkov
+ * Copyright (c) 2015 Vittorio Giovara
*
* This file is part of Libav.
*
/**
* @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"
-typedef struct QdrawContext{
- AVCodecContext *avctx;
- AVFrame pic;
-} QdrawContext;
+enum QuickdrawOpcodes {
+ PACKBITSRECT = 0x0098,
+ PACKBITSRGN,
+ DIRECTBITSRECT,
+ DIRECTBITSRGN,
-static int decode_frame(AVCodecContext *avctx,
- void *data, int *got_frame,
- AVPacket *avpkt)
+ EOP = 0x00FF,
+};
+
+static int parse_palette(AVCodecContext *avctx, GetByteContext *gbc,
+ uint32_t *pal, int colors)
{
- const uint8_t *buf = avpkt->data;
- const uint8_t *buf_end = avpkt->data + avpkt->size;
- int buf_size = avpkt->size;
- QdrawContext * const a = avctx->priv_data;
- AVFrame * const p = &a->pic;
- uint8_t* outdata;
- int colors;
int i;
- uint32_t *pal;
- int r, g, b;
-
- if(p->data[0])
- avctx->release_buffer(avctx, p);
-
- p->reference= 0;
- if(ff_get_buffer(avctx, p) < 0){
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
- }
- p->pict_type= AV_PICTURE_TYPE_I;
- p->key_frame= 1;
-
- outdata = a->pic.data[0];
- if (buf_end - buf < 0x68 + 4)
- return AVERROR_INVALIDDATA;
- buf += 0x68; /* jump to palette */
- colors = AV_RB32(buf);
- buf += 4;
-
- if(colors < 0 || colors > 256) {
- av_log(avctx, AV_LOG_ERROR, "Error color count - %i(0x%X)\n", colors, colors);
- return -1;
- }
- if (buf_end - buf < (colors + 1) * 8)
- return AVERROR_INVALIDDATA;
-
- pal = (uint32_t*)p->data[1];
for (i = 0; i <= colors; i++) {
- unsigned int idx;
- idx = AV_RB16(buf); /* color index */
- buf += 2;
-
+ uint8_t r, g, b;
+ unsigned int idx = bytestream2_get_be16(gbc); /* color index */
if (idx > 255) {
- av_log(avctx, AV_LOG_ERROR, "Palette index out of range: %u\n", idx);
- buf += 6;
+ av_log(avctx, AV_LOG_WARNING,
+ "Palette index out of range: %u\n", idx);
+ bytestream2_skip(gbc, 6);
continue;
}
- r = *buf++;
- buf++;
- g = *buf++;
- buf++;
- b = *buf++;
- buf++;
- pal[idx] = (r << 16) | (g << 8) | b;
+ 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[idx] = (0xFFU << 24) | (r << 16) | (g << 8) | b;
}
- p->palette_has_changed = 1;
+ 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];
- if (buf_end - buf < 18)
- return AVERROR_INVALIDDATA;
- buf += 18; /* skip unneeded data */
for (i = 0; i < avctx->height; i++) {
int size, left, code, pix;
- const uint8_t *next;
- uint8_t *out;
- int tsize = 0;
+ uint8_t *out = outdata;
+ int pos = 0;
- /* decode line */
- out = outdata;
- size = AV_RB16(buf); /* size of packed line */
- buf += 2;
- if (buf_end - buf < size)
+ /* size of packed line */
+ size = left = bytestream2_get_be16(gbc);
+ if (bytestream2_get_bytes_left(gbc) < size)
return AVERROR_INVALIDDATA;
- left = size;
- next = buf + size;
+ /* decode line */
while (left > 0) {
- code = *buf++;
+ code = bytestream2_get_byte(gbc);
if (code & 0x80 ) { /* run */
- pix = *buf++;
- if ((out + (257 - code)) > (outdata + a->pic.linesize[0]))
- break;
- memset(out, pix, 257 - code);
- out += 257 - code;
- tsize += 257 - code;
- left -= 2;
+ pix = bytestream2_get_byte(gbc);
+ for (j = 0; j < 257 - code; j++) {
+ out[pos] = pix;
+ pos += step;
+ if (pos >= offset) {
+ pos -= offset;
+ pos++;
+ }
+ }
+ left -= 2;
} else { /* copy */
- if ((out + code) > (outdata + a->pic.linesize[0]))
- break;
- if (buf_end - buf < code + 1)
- return AVERROR_INVALIDDATA;
- memcpy(out, buf, code + 1);
- out += code + 1;
- buf += code + 1;
- left -= 2 + code;
- tsize += code + 1;
+ for (j = 0; j < code + 1; j++) {
+ out[pos] = bytestream2_get_byte(gbc);
+ pos += step;
+ if (pos >= offset) {
+ pos -= offset;
+ pos++;
+ }
+ }
+ left -= 2 + code;
}
}
- buf = next;
- outdata += a->pic.linesize[0];
+ outdata += p->linesize[0];
}
+ return 0;
+}
- *got_frame = 1;
- *(AVFrame*)data = a->pic;
+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;
- return buf_size;
-}
+ bytestream2_init(&gbc, avpkt->data, avpkt->size);
-static av_cold int decode_init(AVCodecContext *avctx){
-// QdrawContext * const a = avctx->priv_data;
+ /* PICT images start with a 512 bytes empty header */
+ if (bytestream2_peek_be32(&gbc) == 0)
+ bytestream2_skip(&gbc, 512);
- avctx->pix_fmt= AV_PIX_FMT_PAL8;
+ /* 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;
+ }
- return 0;
-}
+ bytestream2_skip(&gbc, 6);
+ h = bytestream2_get_be16(&gbc);
+ w = bytestream2_get_be16(&gbc);
-static av_cold int decode_end(AVCodecContext *avctx){
- QdrawContext * const a = avctx->priv_data;
- AVFrame *pic = &a->pic;
+ ret = ff_set_dimensions(avctx, w, h);
+ if (ret < 0)
+ return ret;
- if (pic->data[0])
- avctx->release_buffer(avctx, pic);
+ /* version 1 is identified by 0x1101
+ * it uses byte-aligned opcodes rather than word-aligned */
+ if (bytestream2_get_be32(&gbc) != 0x001102FF) {
+ avpriv_request_sample(avctx, "QuickDraw version 1");
+ return AVERROR_PATCHWELCOME;
+ }
- return 0;
+ bytestream2_skip(&gbc, 26);
+
+ while (bytestream2_get_bytes_left(&gbc) >= 4) {
+ int bppcnt, bpp;
+ int rowbytes, pack_type;
+ int opcode = bytestream2_get_be16(&gbc);
+
+ switch(opcode) {
+ case PACKBITSRECT:
+ case PACKBITSRGN:
+ av_log(avctx, AV_LOG_DEBUG, "Parsing Packbit opcode\n");
+
+ bytestream2_skip(&gbc, 30);
+ 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 {
+ 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) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
+
+ parse_palette(avctx, &gbc, (uint32_t *)p->data[1], colors);
+ 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");
+ }
+
+ 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, 10);
+ 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 == 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 ((ret = ff_get_buffer(avctx, p, 0)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ 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");
+ }
+
+ ret = decode_rle(avctx, p, &gbc, bppcnt);
+ if (ret < 0)
+ return ret;
+ *got_frame = 1;
+ 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;
+ }
}
AVCodec ff_qdraw_decoder = {
.name = "qdraw",
+ .long_name = NULL_IF_CONFIG_SMALL("Apple QuickDraw"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_QDRAW,
- .priv_data_size = sizeof(QdrawContext),
- .init = decode_init,
- .close = decode_end,
.decode = decode_frame,
- .capabilities = CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("Apple QuickDraw"),
+ .capabilities = AV_CODEC_CAP_DR1,
};
projects / ffmpeg / blobdiff