yading@10: /* yading@10: * Quicktime Planar RGB (8BPS) Video Decoder yading@10: * Copyright (C) 2003 Roberto Togni yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: /** yading@10: * @file yading@10: * QT 8BPS Video Decoder by Roberto Togni yading@10: * For more information about the 8BPS format, visit: yading@10: * http://www.pcisys.net/~melanson/codecs/ yading@10: * yading@10: * Supports: PAL8 (RGB 8bpp, paletted) yading@10: * : BGR24 (RGB 24bpp) (can also output it as RGB32) yading@10: * : RGB32 (RGB 32bpp, 4th plane is alpha) yading@10: * yading@10: */ yading@10: yading@10: #include yading@10: #include yading@10: #include yading@10: yading@10: #include "libavutil/internal.h" yading@10: #include "libavutil/intreadwrite.h" yading@10: #include "avcodec.h" yading@10: #include "internal.h" yading@10: yading@10: yading@10: static const enum AVPixelFormat pixfmt_rgb24[] = { yading@10: AV_PIX_FMT_BGR24, AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE }; yading@10: yading@10: typedef struct EightBpsContext { yading@10: AVCodecContext *avctx; yading@10: yading@10: unsigned char planes; yading@10: unsigned char planemap[4]; yading@10: yading@10: uint32_t pal[256]; yading@10: } EightBpsContext; yading@10: yading@10: static int decode_frame(AVCodecContext *avctx, void *data, yading@10: int *got_frame, AVPacket *avpkt) yading@10: { yading@10: AVFrame *frame = data; yading@10: const uint8_t *buf = avpkt->data; yading@10: int buf_size = avpkt->size; yading@10: EightBpsContext * const c = avctx->priv_data; yading@10: const unsigned char *encoded = buf; yading@10: unsigned char *pixptr, *pixptr_end; yading@10: unsigned int height = avctx->height; // Real image height yading@10: unsigned int dlen, p, row; yading@10: const unsigned char *lp, *dp; yading@10: unsigned char count; yading@10: unsigned int planes = c->planes; yading@10: unsigned char *planemap = c->planemap; yading@10: int ret; yading@10: yading@10: if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) yading@10: return ret; yading@10: yading@10: /* Set data pointer after line lengths */ yading@10: dp = encoded + planes * (height << 1); yading@10: yading@10: for (p = 0; p < planes; p++) { yading@10: /* Lines length pointer for this plane */ yading@10: lp = encoded + p * (height << 1); yading@10: yading@10: /* Decode a plane */ yading@10: for (row = 0; row < height; row++) { yading@10: pixptr = frame->data[0] + row * frame->linesize[0] + planemap[p]; yading@10: pixptr_end = pixptr + frame->linesize[0]; yading@10: if(lp - encoded + row*2 + 1 >= buf_size) yading@10: return -1; yading@10: dlen = av_be2ne16(*(const unsigned short *)(lp + row * 2)); yading@10: /* Decode a row of this plane */ yading@10: while (dlen > 0) { yading@10: if (dp + 1 >= buf + buf_size) yading@10: return AVERROR_INVALIDDATA; yading@10: if ((count = *dp++) <= 127) { yading@10: count++; yading@10: dlen -= count + 1; yading@10: if (pixptr + count * planes > pixptr_end) yading@10: break; yading@10: if (dp + count > buf + buf_size) yading@10: return AVERROR_INVALIDDATA; yading@10: while (count--) { yading@10: *pixptr = *dp++; yading@10: pixptr += planes; yading@10: } yading@10: } else { yading@10: count = 257 - count; yading@10: if (pixptr + count * planes > pixptr_end) yading@10: break; yading@10: while (count--) { yading@10: *pixptr = *dp; yading@10: pixptr += planes; yading@10: } yading@10: dp++; yading@10: dlen -= 2; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: if (avctx->bits_per_coded_sample <= 8) { yading@10: const uint8_t *pal = av_packet_get_side_data(avpkt, yading@10: AV_PKT_DATA_PALETTE, yading@10: NULL); yading@10: if (pal) { yading@10: frame->palette_has_changed = 1; yading@10: memcpy(c->pal, pal, AVPALETTE_SIZE); yading@10: } yading@10: yading@10: memcpy (frame->data[1], c->pal, AVPALETTE_SIZE); yading@10: } yading@10: yading@10: *got_frame = 1; yading@10: yading@10: /* always report that the buffer was completely consumed */ yading@10: return buf_size; yading@10: } yading@10: yading@10: static av_cold int decode_init(AVCodecContext *avctx) yading@10: { yading@10: EightBpsContext * const c = avctx->priv_data; yading@10: yading@10: c->avctx = avctx; yading@10: yading@10: switch (avctx->bits_per_coded_sample) { yading@10: case 8: yading@10: avctx->pix_fmt = AV_PIX_FMT_PAL8; yading@10: c->planes = 1; yading@10: c->planemap[0] = 0; // 1st plane is palette indexes yading@10: break; yading@10: case 24: yading@10: avctx->pix_fmt = avctx->get_format(avctx, pixfmt_rgb24); yading@10: c->planes = 3; yading@10: c->planemap[0] = 2; // 1st plane is red yading@10: c->planemap[1] = 1; // 2nd plane is green yading@10: c->planemap[2] = 0; // 3rd plane is blue yading@10: break; yading@10: case 32: yading@10: avctx->pix_fmt = AV_PIX_FMT_RGB32; yading@10: c->planes = 4; yading@10: #if HAVE_BIGENDIAN yading@10: c->planemap[0] = 1; // 1st plane is red yading@10: c->planemap[1] = 2; // 2nd plane is green yading@10: c->planemap[2] = 3; // 3rd plane is blue yading@10: c->planemap[3] = 0; // 4th plane is alpha yading@10: #else yading@10: c->planemap[0] = 2; // 1st plane is red yading@10: c->planemap[1] = 1; // 2nd plane is green yading@10: c->planemap[2] = 0; // 3rd plane is blue yading@10: c->planemap[3] = 3; // 4th plane is alpha yading@10: #endif yading@10: break; yading@10: default: yading@10: av_log(avctx, AV_LOG_ERROR, "Error: Unsupported color depth: %u.\n", yading@10: avctx->bits_per_coded_sample); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: AVCodec ff_eightbps_decoder = { yading@10: .name = "8bps", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: .id = AV_CODEC_ID_8BPS, yading@10: .priv_data_size = sizeof(EightBpsContext), yading@10: .init = decode_init, yading@10: .decode = decode_frame, yading@10: .capabilities = CODEC_CAP_DR1, yading@10: .long_name = NULL_IF_CONFIG_SMALL("QuickTime 8BPS video"), yading@10: };