| /* |
| * 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" |
| #include "libavutil/opt.h" |
| |
| typedef struct RawVideoContext { |
| AVClass *av_class; |
| 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 |
| int tff; |
| } RawVideoContext; |
| |
| static const AVOption options[]={ |
| {"top", "top field first", offsetof(RawVideoContext, tff), AV_OPT_TYPE_INT, {.dbl = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM|AV_OPT_FLAG_VIDEO_PARAM}, |
| {NULL} |
| }; |
| static const AVClass class = { "rawdec", NULL, options, LIBAVUTIL_VERSION_INT }; |
| |
| static const PixelFormatTag pix_fmt_bps_avi[] = { |
| { PIX_FMT_MONOWHITE, 1 }, |
| { PIX_FMT_PAL8, 2 }, |
| { 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_BGRA, 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 == MKTAG('W','R','A','W')) |
| avctx->pix_fmt = ff_find_pix_fmt(pix_fmt_bps_avi, 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); |
| |
| if (avctx->pix_fmt == PIX_FMT_NONE) { |
| av_log(avctx, AV_LOG_ERROR, "Pixel format was not specified and cannot be detected\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| ff_set_systematic_pal2(context->palette, avctx->pix_fmt); |
| 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->length = avpicture_get_size(avctx->pix_fmt, FFALIGN(avctx->width, 16), avctx->height); |
| context->buffer = av_malloc(context->length); |
| if (!context->buffer) |
| return -1; |
| } else { |
| context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height); |
| } |
| 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('c','y','u','v') || |
| avctx->codec_tag == MKTAG(3, 0, 0, 0) || avctx->codec_tag == MKTAG('W','R','A','W')) |
| 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; |
| int linesize_align = 4; |
| RawVideoContext *context = avctx->priv_data; |
| int res; |
| |
| AVFrame * frame = (AVFrame *) data; |
| AVPicture * picture = (AVPicture *) data; |
| |
| frame->pict_type = avctx->coded_frame->pict_type; |
| 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; |
| |
| if(context->tff>=0){ |
| frame->interlaced_frame = 1; |
| frame->top_field_first = context->tff; |
| } |
| |
| if(buf_size < context->length - (avctx->pix_fmt==PIX_FMT_PAL8 ? 256*4 : 0)) |
| return -1; |
| |
| //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; |
| } |
| linesize_align = 8; |
| } 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; |
| } |
| linesize_align = 16; |
| } |
| 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 ((res = avpicture_fill(picture, buf, avctx->pix_fmt, |
| avctx->width, avctx->height)) < 0) |
| return res; |
| 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 || |
| avctx->pix_fmt==PIX_FMT_GRAY8 || |
| avctx->pix_fmt==PIX_FMT_RGB555LE || |
| avctx->pix_fmt==PIX_FMT_RGB555BE || |
| avctx->pix_fmt==PIX_FMT_RGB565LE || |
| avctx->pix_fmt==PIX_FMT_MONOWHITE || |
| avctx->pix_fmt==PIX_FMT_PAL8) && |
| FFALIGN(frame->linesize[0], linesize_align)*avctx->height <= buf_size) |
| frame->linesize[0] = FFALIGN(frame->linesize[0], linesize_align); |
| |
| if(context->flip) |
| flip(avctx, picture); |
| |
| if ( avctx->codec_tag == MKTAG('Y', 'V', '1', '2') |
| || avctx->codec_tag == MKTAG('Y', 'V', '1', '6') |
| || avctx->codec_tag == MKTAG('Y', 'V', '2', '4') |
| || 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 = { |
| .name = "rawvideo", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = CODEC_ID_RAWVIDEO, |
| .priv_data_size = sizeof(RawVideoContext), |
| .init = raw_init_decoder, |
| .close = raw_close_decoder, |
| .decode = raw_decode, |
| .long_name = NULL_IF_CONFIG_SMALL("raw video"), |
| .priv_class= &class, |
| }; |
