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
28 #include "imgconvert.h"
30 #include "libavutil/intreadwrite.h"
31 #include "libavutil/imgutils.h"
33 typedef struct RawVideoContext {
34 uint32_t palette[AVPALETTE_COUNT];
35 unsigned char * buffer; /* block of memory for holding one frame */
36 int length; /* number of bytes in buffer */
38 AVFrame pic; ///< AVCodecContext.coded_frame
41 static const PixelFormatTag pix_fmt_bps_avi[] = {
44 { PIX_FMT_RGB444, 12 },
45 { PIX_FMT_RGB555, 15 },
46 { PIX_FMT_RGB555, 16 },
47 { PIX_FMT_BGR24, 24 },
48 { PIX_FMT_RGB32, 32 },
52 static const PixelFormatTag pix_fmt_bps_mov[] = {
53 { PIX_FMT_MONOWHITE, 1 },
57 // FIXME swscale does not support 16 bit in .mov, sample 16bit.mov
58 // http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html
59 { PIX_FMT_RGB555BE, 16 },
60 { PIX_FMT_RGB24, 24 },
65 enum PixelFormat ff_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
67 while (tags->pix_fmt >= 0) {
68 if (tags->fourcc == fourcc)
72 return PIX_FMT_YUV420P;
75 static av_cold int raw_init_decoder(AVCodecContext *avctx)
77 RawVideoContext *context = avctx->priv_data;
79 if (avctx->codec_tag == MKTAG('r','a','w',' '))
80 avctx->pix_fmt = ff_find_pix_fmt(pix_fmt_bps_mov, avctx->bits_per_coded_sample);
81 else if (avctx->codec_tag)
82 avctx->pix_fmt = ff_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
83 else if (avctx->pix_fmt == PIX_FMT_NONE && avctx->bits_per_coded_sample)
84 avctx->pix_fmt = ff_find_pix_fmt(pix_fmt_bps_avi, avctx->bits_per_coded_sample);
86 ff_set_systematic_pal2(context->palette, avctx->pix_fmt);
87 context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
88 if((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
89 avctx->pix_fmt==PIX_FMT_PAL8 &&
90 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))){
91 context->buffer = av_malloc(context->length);
95 context->pic.pict_type = AV_PICTURE_TYPE_I;
96 context->pic.key_frame = 1;
98 avctx->coded_frame= &context->pic;
100 if((avctx->extradata_size >= 9 && !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
101 avctx->codec_tag == MKTAG( 3 , 0 , 0 , 0 ))
107 static void flip(AVCodecContext *avctx, AVPicture * picture){
108 picture->data[0] += picture->linesize[0] * (avctx->height-1);
109 picture->linesize[0] *= -1;
112 static int raw_decode(AVCodecContext *avctx,
113 void *data, int *data_size,
116 const uint8_t *buf = avpkt->data;
117 int buf_size = avpkt->size;
118 RawVideoContext *context = avctx->priv_data;
120 AVFrame * frame = (AVFrame *) data;
121 AVPicture * picture = (AVPicture *) data;
123 frame->interlaced_frame = avctx->coded_frame->interlaced_frame;
124 frame->top_field_first = avctx->coded_frame->top_field_first;
125 frame->reordered_opaque = avctx->reordered_opaque;
126 frame->pkt_pts = avctx->pkt->pts;
127 frame->pkt_pos = avctx->pkt->pos;
129 //2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
130 if (context->buffer) {
132 uint8_t *dst = context->buffer;
133 buf_size = context->length - 256*4;
134 if (avctx->bits_per_coded_sample == 4){
135 for(i=0; 2*i+1 < buf_size; i++){
136 dst[2*i+0]= buf[i]>>4;
137 dst[2*i+1]= buf[i]&15;
140 for(i=0; 4*i+3 < buf_size; i++){
141 dst[4*i+0]= buf[i]>>6;
142 dst[4*i+1]= buf[i]>>4&3;
143 dst[4*i+2]= buf[i]>>2&3;
144 dst[4*i+3]= buf[i] &3;
149 if(avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
150 avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
151 buf += buf_size - context->length;
153 if(buf_size < context->length - (avctx->pix_fmt==PIX_FMT_PAL8 ? 256*4 : 0))
156 avpicture_fill(picture, buf, avctx->pix_fmt, avctx->width, avctx->height);
157 if((avctx->pix_fmt==PIX_FMT_PAL8 && buf_size < context->length) ||
158 (avctx->pix_fmt!=PIX_FMT_PAL8 &&
159 (av_pix_fmt_descriptors[avctx->pix_fmt].flags & PIX_FMT_PAL))){
160 frame->data[1]= context->palette;
162 if (avctx->pix_fmt == PIX_FMT_PAL8) {
163 const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
166 memcpy(frame->data[1], pal, AVPALETTE_SIZE);
167 frame->palette_has_changed = 1;
170 if(avctx->pix_fmt==PIX_FMT_BGR24 && ((frame->linesize[0]+3)&~3)*avctx->height <= buf_size)
171 frame->linesize[0] = (frame->linesize[0]+3)&~3;
174 flip(avctx, picture);
176 if ( avctx->codec_tag == MKTAG('Y', 'V', '1', '2')
177 || avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
178 FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
180 if(avctx->codec_tag == AV_RL32("yuv2") &&
181 avctx->pix_fmt == PIX_FMT_YUYV422) {
183 uint8_t *line = picture->data[0];
184 for(y = 0; y < avctx->height; y++) {
185 for(x = 0; x < avctx->width; x++)
186 line[2*x + 1] ^= 0x80;
187 line += picture->linesize[0];
191 *data_size = sizeof(AVPicture);
195 static av_cold int raw_close_decoder(AVCodecContext *avctx)
197 RawVideoContext *context = avctx->priv_data;
199 av_freep(&context->buffer);
203 AVCodec ff_rawvideo_decoder = {
207 sizeof(RawVideoContext),
212 .long_name = NULL_IF_CONFIG_SMALL("raw video"),