3 * Copyright (c) 2001 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * @file libavcodec/rawdec.c
29 #include "libavutil/intreadwrite.h"
31 typedef struct RawVideoContext {
32 unsigned char * buffer; /* block of memory for holding one frame */
33 int length; /* number of bytes in buffer */
35 AVFrame pic; ///< AVCodecContext.coded_frame
38 static const PixelFormatTag pixelFormatBpsAVI[] = {
41 { PIX_FMT_RGB555, 15 },
42 { PIX_FMT_RGB555, 16 },
43 { PIX_FMT_BGR24, 24 },
44 { PIX_FMT_RGB32, 32 },
48 static const PixelFormatTag pixelFormatBpsMOV[] = {
49 { PIX_FMT_MONOWHITE, 1 },
52 // FIXME swscale does not support 16 bit in .mov, sample 16bit.mov
53 // http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html
54 { PIX_FMT_RGB555BE, 16 },
55 { PIX_FMT_RGB24, 24 },
60 static enum PixelFormat findPixelFormat(const PixelFormatTag *tags, unsigned int fourcc)
62 while (tags->pix_fmt >= 0) {
63 if (tags->fourcc == fourcc)
67 return PIX_FMT_YUV420P;
70 static av_cold int raw_init_decoder(AVCodecContext *avctx)
72 RawVideoContext *context = avctx->priv_data;
74 if (avctx->codec_tag == MKTAG('r','a','w',' '))
75 avctx->pix_fmt = findPixelFormat(pixelFormatBpsMOV, avctx->bits_per_coded_sample);
76 else if (avctx->codec_tag)
77 avctx->pix_fmt = findPixelFormat(ff_raw_pixelFormatTags, avctx->codec_tag);
78 else if (avctx->bits_per_coded_sample)
79 avctx->pix_fmt = findPixelFormat(pixelFormatBpsAVI, avctx->bits_per_coded_sample);
81 context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
82 context->buffer = av_malloc(context->length);
83 context->pic.pict_type = FF_I_TYPE;
84 context->pic.key_frame = 1;
86 avctx->coded_frame= &context->pic;
91 if((avctx->extradata_size >= 9 && !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
92 avctx->codec_tag == MKTAG( 3 , 0 , 0 , 0 ))
98 static void flip(AVCodecContext *avctx, AVPicture * picture){
99 picture->data[0] += picture->linesize[0] * (avctx->height-1);
100 picture->linesize[0] *= -1;
103 static int raw_decode(AVCodecContext *avctx,
104 void *data, int *data_size,
107 const uint8_t *buf = avpkt->data;
108 int buf_size = avpkt->size;
109 RawVideoContext *context = avctx->priv_data;
111 AVFrame * frame = (AVFrame *) data;
112 AVPicture * picture = (AVPicture *) data;
114 frame->interlaced_frame = avctx->coded_frame->interlaced_frame;
115 frame->top_field_first = avctx->coded_frame->top_field_first;
117 //4bpp raw in avi and mov (yes this is ugly ...)
118 if(avctx->bits_per_coded_sample == 4 && avctx->pix_fmt==PIX_FMT_PAL8 &&
119 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))){
121 uint8_t *dst = context->buffer + 256*4;
122 buf_size = context->length - 256*4;
123 for(i=0; 2*i+1 < buf_size; i++){
124 dst[2*i+0]= buf[i]>>4;
125 dst[2*i+1]= buf[i]&15;
130 if(buf_size < context->length - (avctx->pix_fmt==PIX_FMT_PAL8 ? 256*4 : 0))
133 avpicture_fill(picture, buf, avctx->pix_fmt, avctx->width, avctx->height);
134 if(avctx->pix_fmt==PIX_FMT_PAL8 && buf_size < context->length){
135 frame->data[1]= context->buffer;
137 if (avctx->palctrl && avctx->palctrl->palette_changed) {
138 memcpy(frame->data[1], avctx->palctrl->palette, AVPALETTE_SIZE);
139 avctx->palctrl->palette_changed = 0;
143 flip(avctx, picture);
145 if ( avctx->codec_tag == MKTAG('Y', 'V', '1', '2')
146 || avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
147 FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
149 if(avctx->codec_tag == AV_RL32("yuv2") &&
150 avctx->pix_fmt == PIX_FMT_YUYV422) {
152 uint8_t *line = picture->data[0];
153 for(y = 0; y < avctx->height; y++) {
154 for(x = 0; x < avctx->width; x++)
155 line[2*x + 1] ^= 0x80;
156 line += picture->linesize[0];
160 *data_size = sizeof(AVPicture);
164 static av_cold int raw_close_decoder(AVCodecContext *avctx)
166 RawVideoContext *context = avctx->priv_data;
168 av_freep(&context->buffer);
172 AVCodec rawvideo_decoder = {
176 sizeof(RawVideoContext),
181 .long_name = NULL_IF_CONFIG_SMALL("raw video"),