| /* |
| * 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 { |
| PACKBITSRECT = 0x0098, |
| PACKBITSRGN, |
| DIRECTBITSRECT, |
| DIRECTBITSRGN, |
| |
| EOP = 0x00FF, |
| }; |
| |
| static int parse_palette(AVCodecContext *avctx, GetByteContext *gbc, |
| uint32_t *pal, int colors) |
| { |
| 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) { |
| av_log(avctx, AV_LOG_WARNING, |
| "Palette index out of range: %u\n", idx); |
| bytestream2_skip(gbc, 6); |
| continue; |
| } |
| 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; |
| } |
| 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++) { |
| out[pos] = pix; |
| pos += step; |
| if (pos >= offset) { |
| pos -= offset; |
| pos++; |
| } |
| if (pos >= offset) |
| return AVERROR_INVALIDDATA; |
| } |
| left -= 2; |
| } else { /* copy */ |
| for (j = 0; j < code + 1; j++) { |
| out[pos] = bytestream2_get_byte(gbc); |
| pos += step; |
| if (pos >= offset) { |
| pos -= offset; |
| pos++; |
| } |
| if (pos >= offset) |
| return AVERROR_INVALIDDATA; |
| } |
| 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 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) |
| 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, |
| .decode = decode_frame, |
| .capabilities = AV_CODEC_CAP_DR1, |
| }; |
