mirror of https://github.com/FFmpeg/FFmpeg.git
Originally committed as revision 9560 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
Aurelien Jacobs
18 years ago
parent
0d336e44db
commit
3a763f0f0b
5 changed files with 249 additions and 163 deletions
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/*
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* Raw Video Codec |
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* Copyright (c) 2001 Fabrice Bellard. |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/**
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* @file raw.h |
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* Raw Video Codec |
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*/ |
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#ifndef AVCODEC_RAW_H |
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#define AVCODEC_RAW_H |
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#include "avcodec.h" |
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typedef struct PixelFormatTag { |
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int pix_fmt; |
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unsigned int fourcc; |
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} PixelFormatTag; |
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extern const PixelFormatTag ff_raw_pixelFormatTags[]; |
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#endif /* AVCODEC_RAW_H */ |
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/*
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* Raw Video Decoder |
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* Copyright (c) 2001 Fabrice Bellard. |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/**
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* @file rawdec.c |
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* Raw Video Decoder |
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*/ |
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#include "avcodec.h" |
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#include "raw.h" |
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typedef struct RawVideoContext { |
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unsigned char * buffer; /* block of memory for holding one frame */ |
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int length; /* number of bytes in buffer */ |
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AVFrame pic; ///< AVCodecContext.coded_frame
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} RawVideoContext; |
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static const PixelFormatTag pixelFormatBpsAVI[] = { |
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{ PIX_FMT_PAL8, 8 }, |
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{ PIX_FMT_RGB555, 15 }, |
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{ PIX_FMT_RGB555, 16 }, |
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{ PIX_FMT_BGR24, 24 }, |
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{ PIX_FMT_RGB32, 32 }, |
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{ -1, 0 }, |
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}; |
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static const PixelFormatTag pixelFormatBpsMOV[] = { |
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/* FIXME fix swscaler to support those */ |
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/* http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/chapter_4_section_2.html */ |
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{ PIX_FMT_PAL8, 8 }, |
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{ PIX_FMT_BGR555, 16 }, |
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{ PIX_FMT_RGB24, 24 }, |
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{ PIX_FMT_BGR32_1, 32 }, |
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{ -1, 0 }, |
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}; |
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static int findPixelFormat(const PixelFormatTag *tags, unsigned int fourcc) |
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{ |
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while (tags->pix_fmt >= 0) { |
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if (tags->fourcc == fourcc) |
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return tags->pix_fmt; |
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tags++; |
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} |
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return PIX_FMT_YUV420P; |
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} |
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static int raw_init_decoder(AVCodecContext *avctx) |
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{ |
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RawVideoContext *context = avctx->priv_data; |
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if (avctx->codec_tag == MKTAG('r','a','w',' ')) |
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avctx->pix_fmt = findPixelFormat(pixelFormatBpsMOV, avctx->bits_per_sample); |
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else if (avctx->codec_tag) |
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avctx->pix_fmt = findPixelFormat(ff_raw_pixelFormatTags, avctx->codec_tag); |
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else if (avctx->bits_per_sample) |
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avctx->pix_fmt = findPixelFormat(pixelFormatBpsAVI, avctx->bits_per_sample); |
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context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height); |
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context->buffer = av_malloc(context->length); |
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context->pic.pict_type = FF_I_TYPE; |
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context->pic.key_frame = 1; |
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avctx->coded_frame= &context->pic; |
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if (!context->buffer) |
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return -1; |
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return 0; |
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} |
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static void flip(AVCodecContext *avctx, AVPicture * picture){ |
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if(!avctx->codec_tag && avctx->bits_per_sample && picture->linesize[2]==0){ |
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picture->data[0] += picture->linesize[0] * (avctx->height-1); |
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picture->linesize[0] *= -1; |
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} |
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} |
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static int raw_decode(AVCodecContext *avctx, |
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void *data, int *data_size, |
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uint8_t *buf, int buf_size) |
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{ |
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RawVideoContext *context = avctx->priv_data; |
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AVFrame * frame = (AVFrame *) data; |
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AVPicture * picture = (AVPicture *) data; |
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frame->interlaced_frame = avctx->coded_frame->interlaced_frame; |
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frame->top_field_first = avctx->coded_frame->top_field_first; |
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if(buf_size < context->length - (avctx->pix_fmt==PIX_FMT_PAL8 ? 256*4 : 0)) |
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return -1; |
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avpicture_fill(picture, buf, avctx->pix_fmt, avctx->width, avctx->height); |
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if(avctx->pix_fmt==PIX_FMT_PAL8 && buf_size < context->length){ |
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frame->data[1]= context->buffer; |
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} |
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if (avctx->palctrl && avctx->palctrl->palette_changed) { |
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memcpy(frame->data[1], avctx->palctrl->palette, AVPALETTE_SIZE); |
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avctx->palctrl->palette_changed = 0; |
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} |
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flip(avctx, picture); |
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if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2')) |
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{ |
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// swap fields
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unsigned char *tmp = picture->data[1]; |
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picture->data[1] = picture->data[2]; |
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picture->data[2] = tmp; |
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} |
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*data_size = sizeof(AVPicture); |
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return buf_size; |
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} |
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static int raw_close_decoder(AVCodecContext *avctx) |
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{ |
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RawVideoContext *context = avctx->priv_data; |
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av_freep(&context->buffer); |
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return 0; |
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} |
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AVCodec rawvideo_decoder = { |
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"rawvideo", |
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CODEC_TYPE_VIDEO, |
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CODEC_ID_RAWVIDEO, |
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sizeof(RawVideoContext), |
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raw_init_decoder, |
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NULL, |
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raw_close_decoder, |
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raw_decode, |
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}; |
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@ -0,0 +1,54 @@ |
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/*
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* Raw Video Encoder |
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* Copyright (c) 2001 Fabrice Bellard. |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/**
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* @file rawenc.c |
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* Raw Video Encoder |
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*/ |
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#include "avcodec.h" |
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#include "raw.h" |
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static int raw_init_encoder(AVCodecContext *avctx) |
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{ |
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avctx->coded_frame = (AVFrame *)avctx->priv_data; |
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avctx->coded_frame->pict_type = FF_I_TYPE; |
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avctx->coded_frame->key_frame = 1; |
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if(!avctx->codec_tag) |
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avctx->codec_tag = avcodec_pix_fmt_to_codec_tag(avctx->pix_fmt); |
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return 0; |
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} |
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static int raw_encode(AVCodecContext *avctx, |
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unsigned char *frame, int buf_size, void *data) |
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{ |
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return avpicture_layout((AVPicture *)data, avctx->pix_fmt, avctx->width, |
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avctx->height, frame, buf_size); |
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} |
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AVCodec rawvideo_encoder = { |
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"rawvideo", |
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CODEC_TYPE_VIDEO, |
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CODEC_ID_RAWVIDEO, |
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sizeof(AVFrame), |
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raw_init_encoder, |
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raw_encode, |
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}; |
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