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[] = {
51 // FIXME swscale does not support 16 bit in .mov, sample 16bit.mov
52 // http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html
53 { PIX_FMT_BGR555, 16 },
54 { PIX_FMT_RGB24, 24 },
55 { PIX_FMT_BGR32_1, 32 },
59 static enum PixelFormat findPixelFormat(const PixelFormatTag *tags, unsigned int fourcc)
61 while (tags->pix_fmt >= 0) {
62 if (tags->fourcc == fourcc)
66 return PIX_FMT_YUV420P;
69 static av_cold int raw_init_decoder(AVCodecContext *avctx)
71 RawVideoContext *context = avctx->priv_data;
73 if (avctx->codec_tag == MKTAG('r','a','w',' '))
74 avctx->pix_fmt = findPixelFormat(pixelFormatBpsMOV, avctx->bits_per_coded_sample);
75 else if (avctx->codec_tag)
76 avctx->pix_fmt = findPixelFormat(ff_raw_pixelFormatTags, avctx->codec_tag);
77 else if (avctx->bits_per_coded_sample)
78 avctx->pix_fmt = findPixelFormat(pixelFormatBpsAVI, avctx->bits_per_coded_sample);
80 context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
81 context->buffer = av_malloc(context->length);
82 context->pic.pict_type = FF_I_TYPE;
83 context->pic.key_frame = 1;
85 avctx->coded_frame= &context->pic;
90 if(avctx->extradata_size >= 9 && !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9))
96 static void flip(AVCodecContext *avctx, AVPicture * picture){
97 picture->data[0] += picture->linesize[0] * (avctx->height-1);
98 picture->linesize[0] *= -1;
101 static int raw_decode(AVCodecContext *avctx,
102 void *data, int *data_size,
105 const uint8_t *buf = avpkt->data;
106 int buf_size = avpkt->size;
107 RawVideoContext *context = avctx->priv_data;
109 AVFrame * frame = (AVFrame *) data;
110 AVPicture * picture = (AVPicture *) data;
112 frame->interlaced_frame = avctx->coded_frame->interlaced_frame;
113 frame->top_field_first = avctx->coded_frame->top_field_first;
115 //4bpp raw in avi and mov (yes this is ugly ...)
116 if(avctx->bits_per_coded_sample == 4 && avctx->pix_fmt==PIX_FMT_PAL8 &&
117 (!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))){
119 for(i=256*2; i+1 < context->length>>1; i++){
120 context->buffer[2*i+0]= buf[i-256*2]>>4;
121 context->buffer[2*i+1]= buf[i-256*2]&15;
123 buf= context->buffer + 256*4;
124 buf_size= context->length - 256*4;
127 if(buf_size < context->length - (avctx->pix_fmt==PIX_FMT_PAL8 ? 256*4 : 0))
130 avpicture_fill(picture, buf, avctx->pix_fmt, avctx->width, avctx->height);
131 if(avctx->pix_fmt==PIX_FMT_PAL8 && buf_size < context->length){
132 frame->data[1]= context->buffer;
134 if (avctx->palctrl && avctx->palctrl->palette_changed) {
135 memcpy(frame->data[1], avctx->palctrl->palette, AVPALETTE_SIZE);
136 avctx->palctrl->palette_changed = 0;
140 flip(avctx, picture);
142 if ( avctx->codec_tag == MKTAG('Y', 'V', '1', '2')
143 || avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
146 unsigned char *tmp = picture->data[1];
147 picture->data[1] = picture->data[2];
148 picture->data[2] = tmp;
151 if(avctx->codec_tag == AV_RL32("yuv2") &&
152 avctx->pix_fmt == PIX_FMT_YUYV422) {
154 uint8_t *line = picture->data[0];
155 for(y = 0; y < avctx->height; y++) {
156 for(x = 0; x < avctx->width; x++)
157 line[2*x + 1] ^= 0x80;
158 line += picture->linesize[0];
162 *data_size = sizeof(AVPicture);
166 static av_cold int raw_close_decoder(AVCodecContext *avctx)
168 RawVideoContext *context = avctx->priv_data;
170 av_freep(&context->buffer);
174 AVCodec rawvideo_decoder = {
178 sizeof(RawVideoContext),
183 .long_name = NULL_IF_CONFIG_SMALL("raw video"),