X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2F8bps.c;h=3fd15e05eb42bdda4662dce1bc526a72a66c311d;hb=b11acd57326db6c2cc1475dd0bea2a06fbc85aa2;hp=47c90c9fe28e3e8594461d7fbfc0b429ac38c32c;hpb=7a00bbad2100367481240e62876b941b5c4befdc;p=ffmpeg diff --git a/libavcodec/8bps.c b/libavcodec/8bps.c index 47c90c9fe28..3fd15e05eb4 100644 --- a/libavcodec/8bps.c +++ b/libavcodec/8bps.c @@ -2,25 +2,25 @@ * Quicktime Planar RGB (8BPS) Video Decoder * Copyright (C) 2003 Roberto Togni * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * 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 2.1 of the License, or (at your option) any later version. * - * FFmpeg 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 FFmpeg; if not, write to the Free Software + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** - * @file libavcodec/8bps.c + * @file * QT 8BPS Video Decoder by Roberto Togni * For more information about the 8BPS format, visit: * http://www.pcisys.net/~melanson/codecs/ @@ -33,205 +33,165 @@ #include #include +#include +#include "libavutil/internal.h" #include "libavutil/intreadwrite.h" #include "avcodec.h" +#include "internal.h" -static const enum PixelFormat pixfmt_rgb24[] = {PIX_FMT_BGR24, PIX_FMT_RGB32, PIX_FMT_NONE}; +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, AVPacket *avpkt) +static int decode_frame(AVCodecContext *avctx, void *data, + int *got_frame, AVPacket *avpkt) { - 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; - unsigned char count; - unsigned int px_inc; - unsigned int planes = c->planes; - unsigned char *planemap = c->planemap; - - 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; - } + 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; + } - /* 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_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 = c->pic.data[0] + row * c->pic.linesize[0] + planemap[p]; - pixptr_end = pixptr + c->pic.linesize[0]; - dlen = be2me_16(*(const unsigned short *)(lp+row*2)); - /* Decode a row of this plane */ - while(dlen > 0) { - if(dp + 1 >= buf+buf_size) return -1; - if ((count = *dp++) <= 127) { - count++; - dlen -= count + 1; - if (pixptr + count * px_inc > pixptr_end) - break; - if(dp + count > buf+buf_size) return -1; - 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; - } - } + 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; } + } } + } - 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; + 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); } - *data_size = sizeof(AVFrame); - *(AVFrame*)data = c->pic; - - /* always report that the buffer was completely consumed */ - return buf_size; -} - - -/* - * - * Init 8BPS decoder - * - */ -static av_cold int decode_init(AVCodecContext *avctx) -{ - EightBpsContext * const c = avctx->priv_data; - - c->avctx = avctx; - - c->pic.data[0] = NULL; - - if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) { - return 1; + memcpy (frame->data[1], c->pal, AVPALETTE_SIZE); } - switch (avctx->bits_per_coded_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_RGB32; - 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_coded_sample); - return -1; - } + *got_frame = 1; - return 0; + /* always report that the buffer was completely consumed */ + return buf_size; } - - - -/* - * - * Uninit 8BPS decoder - * - */ -static av_cold int decode_end(AVCodecContext *avctx) +static av_cold int decode_init(AVCodecContext *avctx) { - EightBpsContext * const c = 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, - .long_name = NULL_IF_CONFIG_SMALL("QuickTime 8BPS video"), +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 = CODEC_CAP_DR1, };