/* * Raw Video Decoder * Copyright (c) 2001 Fabrice Bellard * * 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 * Raw Video Decoder */ #include "avcodec.h" #include "imgconvert.h" #include "raw.h" #include "libavutil/intreadwrite.h" #include "libavutil/imgutils.h" typedef struct RawVideoContext { uint32_t palette[AVPALETTE_COUNT]; unsigned char * buffer; /* block of memory for holding one frame */ int length; /* number of bytes in buffer */ int flip; AVFrame pic; ///< AVCodecContext.coded_frame } RawVideoContext; static const PixelFormatTag pix_fmt_bps_avi[] = { { PIX_FMT_PAL8, 4 }, { PIX_FMT_PAL8, 8 }, { PIX_FMT_RGB444, 12 }, { PIX_FMT_RGB555, 15 }, { PIX_FMT_RGB555, 16 }, { PIX_FMT_BGR24, 24 }, { PIX_FMT_RGB32, 32 }, { PIX_FMT_NONE, 0 }, }; static const PixelFormatTag pix_fmt_bps_mov[] = { { PIX_FMT_MONOWHITE, 1 }, { PIX_FMT_PAL8, 2 }, { PIX_FMT_PAL8, 4 }, { PIX_FMT_PAL8, 8 }, // FIXME swscale does not support 16 bit in .mov, sample 16bit.mov // http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html { PIX_FMT_RGB555BE, 16 }, { PIX_FMT_RGB24, 24 }, { PIX_FMT_ARGB, 32 }, { PIX_FMT_MONOWHITE,33 }, { PIX_FMT_NONE, 0 }, }; enum PixelFormat ff_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc) { while (tags->pix_fmt >= 0) { if (tags->fourcc == fourcc) return tags->pix_fmt; tags++; } return PIX_FMT_YUV420P; } static av_cold int raw_init_decoder(AVCodecContext *avctx) { RawVideoContext *context = avctx->priv_data; if (avctx->codec_tag == MKTAG('r','a','w',' ')) avctx->pix_fmt = ff_find_pix_fmt(pix_fmt_bps_mov, avctx->bits_per_coded_sample); else if (avctx->codec_tag) avctx->pix_fmt = ff_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag); else if (avctx->pix_fmt == PIX_FMT_NONE && avctx->bits_per_coded_sample) avctx->pix_fmt = ff_find_pix_fmt(pix_fmt_bps_avi, avctx->bits_per_coded_sample); ff_set_systematic_pal2(context->palette, avctx->pix_fmt); context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height); if((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) && avctx->pix_fmt==PIX_FMT_PAL8 && (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))){ context->buffer = av_malloc(context->length); if (!context->buffer) return -1; } context->pic.pict_type = AV_PICTURE_TYPE_I; context->pic.key_frame = 1; avctx->coded_frame= &context->pic; if((avctx->extradata_size >= 9 && !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) || avctx->codec_tag == MKTAG( 3 , 0 , 0 , 0 )) context->flip=1; return 0; } static void flip(AVCodecContext *avctx, AVPicture * picture){ picture->data[0] += picture->linesize[0] * (avctx->height-1); picture->linesize[0] *= -1; } static int raw_decode(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt) { const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; RawVideoContext *context = avctx->priv_data; AVFrame * frame = (AVFrame *) data; AVPicture * picture = (AVPicture *) data; frame->interlaced_frame = avctx->coded_frame->interlaced_frame; frame->top_field_first = avctx->coded_frame->top_field_first; frame->reordered_opaque = avctx->reordered_opaque; frame->pkt_pts = avctx->pkt->pts; frame->pkt_pos = avctx->pkt->pos; //2bpp and 4bpp raw in avi and mov (yes this is ugly ...) if (context->buffer) { int i; uint8_t *dst = context->buffer; buf_size = context->length - 256*4; if (avctx->bits_per_coded_sample == 4){ for(i=0; 2*i+1 < buf_size; i++){ dst[2*i+0]= buf[i]>>4; dst[2*i+1]= buf[i]&15; } } else for(i=0; 4*i+3 < buf_size; i++){ dst[4*i+0]= buf[i]>>6; dst[4*i+1]= buf[i]>>4&3; dst[4*i+2]= buf[i]>>2&3; dst[4*i+3]= buf[i] &3; } buf= dst; } if(avctx->codec_tag == MKTAG('A', 'V', '1', 'x') || avctx->codec_tag == MKTAG('A', 'V', 'u', 'p')) buf += buf_size - context->length; if(buf_size < context->length - (avctx->pix_fmt==PIX_FMT_PAL8 ? 256*4 : 0)) return -1; avpicture_fill(picture, buf, avctx->pix_fmt, avctx->width, avctx->height); if((avctx->pix_fmt==PIX_FMT_PAL8 && buf_size < context->length) || (avctx->pix_fmt!=PIX_FMT_PAL8 && (av_pix_fmt_descriptors[avctx->pix_fmt].flags & PIX_FMT_PAL))){ frame->data[1]= context->palette; } if (avctx->pix_fmt == PIX_FMT_PAL8) { const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL); if (pal) { memcpy(frame->data[1], pal, AVPALETTE_SIZE); frame->palette_has_changed = 1; } } if(avctx->pix_fmt==PIX_FMT_BGR24 && ((frame->linesize[0]+3)&~3)*avctx->height <= buf_size) frame->linesize[0] = (frame->linesize[0]+3)&~3; if(context->flip) flip(avctx, picture); if ( avctx->codec_tag == MKTAG('Y', 'V', '1', '2') || avctx->codec_tag == MKTAG('Y', 'V', 'U', '9')) FFSWAP(uint8_t *, picture->data[1], picture->data[2]); if(avctx->codec_tag == AV_RL32("yuv2") && avctx->pix_fmt == PIX_FMT_YUYV422) { int x, y; uint8_t *line = picture->data[0]; for(y = 0; y < avctx->height; y++) { for(x = 0; x < avctx->width; x++) line[2*x + 1] ^= 0x80; line += picture->linesize[0]; } } *data_size = sizeof(AVPicture); return buf_size; } static av_cold int raw_close_decoder(AVCodecContext *avctx) { RawVideoContext *context = avctx->priv_data; av_freep(&context->buffer); return 0; } AVCodec ff_rawvideo_decoder = { "rawvideo", AVMEDIA_TYPE_VIDEO, CODEC_ID_RAWVIDEO, sizeof(RawVideoContext), raw_init_decoder, NULL, raw_close_decoder, raw_decode, .long_name = NULL_IF_CONFIG_SMALL("raw video"), };