X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2F8bps.c;h=78b616fdf4c3c963655111fa537db06afa728c45;hb=4628443ca3534060888dd0015b229337eac13fd2;hp=9adf4967c5ccd3f3e65ecd67a82cbf785906157b;hpb=c31b81216619e6b3d986ce63c82357993e10e8e9;p=ffmpeg diff --git a/libavcodec/8bps.c b/libavcodec/8bps.c index 9adf4967c5c..78b616fdf4c 100644 --- a/libavcodec/8bps.c +++ b/libavcodec/8bps.c @@ -2,238 +2,196 @@ * Quicktime Planar RGB (8BPS) Video Decoder * Copyright (C) 2003 Roberto Togni * - * This library is free software; you can redistribute it and/or + * This file is part of Libav. + * + * Libav 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 of the License, or (at your option) any later version. + * version 2.1 of the License, or (at your option) any later version. * - * This library is distributed in the hope that it will be useful, + * Libav 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 this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * + * License along with Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** - * @file 8bps.c - * QT 8BPS Video Decoder by Roberto Togni + * @file + * QT 8BPS Video Decoder by Roberto Togni * For more information about the 8BPS format, visit: * http://www.pcisys.net/~melanson/codecs/ * * Supports: PAL8 (RGB 8bpp, paletted) - * : BGR24 (RGB 24bpp) (can also output it as RGBA32) - * : RGBA32 (RGB 32bpp, 4th plane is probably alpha and it's ignored) + * : BGR24 (RGB 24bpp) (can also output it as RGB32) + * : RGB32 (RGB 32bpp, 4th plane is probably alpha and it's ignored) * */ #include #include +#include -#include "common.h" +#include "libavutil/internal.h" +#include "libavutil/intreadwrite.h" #include "avcodec.h" +#include "internal.h" -const enum PixelFormat pixfmt_rgb24[] = {PIX_FMT_BGR24, PIX_FMT_RGBA32, -1}; +static const enum AVPixelFormat pixfmt_rgb24[] = { + AV_PIX_FMT_BGR24, AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE }; -/* - * Decoder context - */ typedef struct EightBpsContext { + AVCodecContext *avctx; - AVCodecContext *avctx; - AVFrame pic; + unsigned char planes; + unsigned char planemap[4]; - unsigned char planes; - unsigned char planemap[4]; + uint32_t pal[256]; } EightBpsContext; - -/* - * - * Decode a frame - * - */ -static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size) -{ - EightBpsContext * const c = (EightBpsContext *)avctx->priv_data; - unsigned char *encoded = (unsigned char *)buf; - unsigned char *pixptr, *pixptr_end; - unsigned int height = avctx->height; // Real image height - unsigned int dlen, p, row; - unsigned char *lp, *dp; - unsigned char count; - unsigned int px_inc; - unsigned int planes = c->planes; - unsigned char *planemap = c->planemap; - - - /* no supplementary picture */ - if (buf_size == 0) - return 0; - - if(c->pic.data[0]) - avctx->release_buffer(avctx, &c->pic); - - c->pic.reference = 0; - c->pic.buffer_hints = FF_BUFFER_HINTS_VALID; - if(avctx->get_buffer(avctx, &c->pic) < 0){ - av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); - return -1; - } - - /* Set data pointer after line lengths */ - dp = encoded + planes * (height << 1); - - /* Ignore alpha plane, don't know what to do with it */ - if (planes == 4) - planes--; - - px_inc = planes + (avctx->pix_fmt == PIX_FMT_RGBA32); - - for (p = 0; p < planes; p++) { - /* Lines length pointer for this plane */ - lp = encoded + p * (height << 1); - - /* Decode a plane */ - for(row = 0; row < height; row++) { - pixptr = c->pic.data[0] + row * c->pic.linesize[0] + planemap[p]; - pixptr_end = pixptr + c->pic.linesize[0]; - dlen = be2me_16(*(unsigned short *)(lp+row*2)); - /* Decode a row of this plane */ - while(dlen > 0) { - if ((count = *dp++) <= 127) { - count++; - dlen -= count + 1; - if (pixptr + count * px_inc > pixptr_end) - break; - while(count--) { - *pixptr = *dp++; - pixptr += px_inc; - } - } else { - count = 257 - count; - if (pixptr + count * px_inc > pixptr_end) - break; - while(count--) { - *pixptr = *dp; - pixptr += px_inc; - } - dp++; - dlen -= 2; - } - } - } - } - - if (avctx->palctrl) { - memcpy (c->pic.data[1], avctx->palctrl->palette, AVPALETTE_SIZE); - if (avctx->palctrl->palette_changed) { - c->pic.palette_has_changed = 1; - avctx->palctrl->palette_changed = 0; - } else - c->pic.palette_has_changed = 0; - } - - *data_size = sizeof(AVFrame); - *(AVFrame*)data = c->pic; - - /* always report that the buffer was completely consumed */ - return buf_size; -} - - -/* - * - * Init 8BPS decoder - * - */ -static int decode_init(AVCodecContext *avctx) +static int decode_frame(AVCodecContext *avctx, void *data, + int *got_frame, AVPacket *avpkt) { - EightBpsContext * const c = (EightBpsContext *)avctx->priv_data; - - c->avctx = avctx; - avctx->has_b_frames = 0; - - c->pic.data[0] = NULL; + AVFrame *frame = data; + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; + EightBpsContext * const c = avctx->priv_data; + const unsigned char *encoded = buf; + unsigned char *pixptr, *pixptr_end; + unsigned int height = avctx->height; // Real image height + unsigned int dlen, p, row; + const unsigned char *lp, *dp, *ep; + unsigned char count; + unsigned int px_inc; + unsigned int planes = c->planes; + unsigned char *planemap = c->planemap; + int ret; + + if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) { + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + return ret; + } - // FIXME: find a better way to prevent integer overflow - if (((unsigned int)avctx->width > 32000) || ((unsigned int)avctx->height > 32000)) { - av_log(avctx, AV_LOG_ERROR, "Bad image size (w = %d, h = %d).\n", avctx->width, avctx->height); - return 1; + ep = encoded + buf_size; + + /* Set data pointer after line lengths */ + dp = encoded + planes * (height << 1); + + /* Ignore alpha plane, don't know what to do with it */ + if (planes == 4) + planes--; + + px_inc = planes + (avctx->pix_fmt == AV_PIX_FMT_RGB32); + + for (p = 0; p < planes; p++) { + /* Lines length pointer for this plane */ + lp = encoded + p * (height << 1); + + /* Decode a plane */ + for (row = 0; row < height; row++) { + pixptr = frame->data[0] + row * frame->linesize[0] + planemap[p]; + pixptr_end = pixptr + frame->linesize[0]; + if (ep - lp < row * 2 + 2) + return AVERROR_INVALIDDATA; + dlen = av_be2ne16(*(const unsigned short *)(lp + row * 2)); + /* Decode a row of this plane */ + while (dlen > 0) { + if (ep - dp <= 1) + return AVERROR_INVALIDDATA; + if ((count = *dp++) <= 127) { + count++; + dlen -= count + 1; + if (pixptr_end - pixptr < count * px_inc) + break; + if (ep - dp < count) + return AVERROR_INVALIDDATA; + while (count--) { + *pixptr = *dp++; + pixptr += px_inc; + } + } else { + count = 257 - count; + if (pixptr_end - pixptr < count * px_inc) + break; + while (count--) { + *pixptr = *dp; + pixptr += px_inc; + } + dp++; + dlen -= 2; + } + } + } } - switch (avctx->bits_per_sample) { - case 8: - avctx->pix_fmt = PIX_FMT_PAL8; - c->planes = 1; - c->planemap[0] = 0; // 1st plane is palette indexes - if (avctx->palctrl == NULL) { - av_log(avctx, AV_LOG_ERROR, "Error: PAL8 format but no palette from demuxer.\n"); - return -1; - } - break; - case 24: - avctx->pix_fmt = avctx->get_format(avctx, pixfmt_rgb24); - c->planes = 3; - c->planemap[0] = 2; // 1st plane is red - c->planemap[1] = 1; // 2nd plane is green - c->planemap[2] = 0; // 3rd plane is blue - break; - case 32: - avctx->pix_fmt = PIX_FMT_RGBA32; - c->planes = 4; -#ifdef WORDS_BIGENDIAN - c->planemap[0] = 1; // 1st plane is red - c->planemap[1] = 2; // 2nd plane is green - c->planemap[2] = 3; // 3rd plane is blue - c->planemap[3] = 0; // 4th plane is alpha??? -#else - c->planemap[0] = 2; // 1st plane is red - c->planemap[1] = 1; // 2nd plane is green - c->planemap[2] = 0; // 3rd plane is blue - c->planemap[3] = 3; // 4th plane is alpha??? -#endif - break; - default: - av_log(avctx, AV_LOG_ERROR, "Error: Unsupported color depth: %u.\n", avctx->bits_per_sample); - return -1; - } - - return 0; -} + if (avctx->bits_per_coded_sample <= 8) { + const uint8_t *pal = av_packet_get_side_data(avpkt, + AV_PKT_DATA_PALETTE, + NULL); + if (pal) { + frame->palette_has_changed = 1; + memcpy(c->pal, pal, AVPALETTE_SIZE); + } + memcpy (frame->data[1], c->pal, AVPALETTE_SIZE); + } + *got_frame = 1; + /* always report that the buffer was completely consumed */ + return buf_size; +} -/* - * - * Uninit 8BPS decoder - * - */ -static int decode_end(AVCodecContext *avctx) +static av_cold int decode_init(AVCodecContext *avctx) { - EightBpsContext * const c = (EightBpsContext *)avctx->priv_data; - - if (c->pic.data[0]) - avctx->release_buffer(avctx, &c->pic); + EightBpsContext * const c = avctx->priv_data; + + c->avctx = avctx; + + switch (avctx->bits_per_coded_sample) { + case 8: + avctx->pix_fmt = AV_PIX_FMT_PAL8; + c->planes = 1; + c->planemap[0] = 0; // 1st plane is palette indexes + break; + case 24: + avctx->pix_fmt = ff_get_format(avctx, pixfmt_rgb24); + c->planes = 3; + c->planemap[0] = 2; // 1st plane is red + c->planemap[1] = 1; // 2nd plane is green + c->planemap[2] = 0; // 3rd plane is blue + break; + case 32: + avctx->pix_fmt = AV_PIX_FMT_RGB32; + c->planes = 4; + /* handle planemap setup later for decoding rgb24 data as rbg32 */ + break; + default: + av_log(avctx, AV_LOG_ERROR, "Error: Unsupported color depth: %u.\n", + avctx->bits_per_coded_sample); + return AVERROR_INVALIDDATA; + } - return 0; + if (avctx->pix_fmt == AV_PIX_FMT_RGB32) { + c->planemap[0] = HAVE_BIGENDIAN ? 1 : 2; // 1st plane is red + c->planemap[1] = HAVE_BIGENDIAN ? 2 : 1; // 2nd plane is green + c->planemap[2] = HAVE_BIGENDIAN ? 3 : 0; // 3rd plane is blue + c->planemap[3] = HAVE_BIGENDIAN ? 0 : 3; // 4th plane is alpha??? + } + return 0; } - - -AVCodec eightbps_decoder = { - "8bps", - CODEC_TYPE_VIDEO, - CODEC_ID_8BPS, - sizeof(EightBpsContext), - decode_init, - NULL, - decode_end, - decode_frame, - CODEC_CAP_DR1, +AVCodec ff_eightbps_decoder = { + .name = "8bps", + .long_name = NULL_IF_CONFIG_SMALL("QuickTime 8BPS video"), + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_8BPS, + .priv_data_size = sizeof(EightBpsContext), + .init = decode_init, + .decode = decode_frame, + .capabilities = AV_CODEC_CAP_DR1, };