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
30 typedef struct RawVideoContext {
31 unsigned char * buffer; /* block of memory for holding one frame */
32 int length; /* number of bytes in buffer */
33 AVFrame pic; ///< AVCodecContext.coded_frame
36 static const PixelFormatTag pixelFormatBpsAVI[] = {
39 { PIX_FMT_RGB555, 15 },
40 { PIX_FMT_RGB555, 16 },
41 { PIX_FMT_BGR24, 24 },
42 { PIX_FMT_RGB32, 32 },
46 static const PixelFormatTag pixelFormatBpsMOV[] = {
47 /* FIXME fix swscaler to support those */
48 /* http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/chapter_4_section_2.html */
50 { PIX_FMT_BGR555, 16 },
51 { PIX_FMT_RGB24, 24 },
52 { PIX_FMT_BGR32_1, 32 },
56 static int findPixelFormat(const PixelFormatTag *tags, unsigned int fourcc)
58 while (tags->pix_fmt >= 0) {
59 if (tags->fourcc == fourcc)
63 return PIX_FMT_YUV420P;
66 static int raw_init_decoder(AVCodecContext *avctx)
68 RawVideoContext *context = avctx->priv_data;
70 if (avctx->codec_tag == MKTAG('r','a','w',' '))
71 avctx->pix_fmt = findPixelFormat(pixelFormatBpsMOV, avctx->bits_per_sample);
72 else if (avctx->codec_tag)
73 avctx->pix_fmt = findPixelFormat(ff_raw_pixelFormatTags, avctx->codec_tag);
74 else if (avctx->bits_per_sample)
75 avctx->pix_fmt = findPixelFormat(pixelFormatBpsAVI, avctx->bits_per_sample);
77 context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
78 context->buffer = av_malloc(context->length);
79 context->pic.pict_type = FF_I_TYPE;
80 context->pic.key_frame = 1;
82 avctx->coded_frame= &context->pic;
90 static void flip(AVCodecContext *avctx, AVPicture * picture){
91 if(!avctx->codec_tag && avctx->bits_per_sample && picture->linesize[2]==0){
92 picture->data[0] += picture->linesize[0] * (avctx->height-1);
93 picture->linesize[0] *= -1;
97 static int raw_decode(AVCodecContext *avctx,
98 void *data, int *data_size,
99 uint8_t *buf, int buf_size)
101 RawVideoContext *context = avctx->priv_data;
103 AVFrame * frame = (AVFrame *) data;
104 AVPicture * picture = (AVPicture *) data;
106 frame->interlaced_frame = avctx->coded_frame->interlaced_frame;
107 frame->top_field_first = avctx->coded_frame->top_field_first;
109 //4bpp raw in avi (yes this is ugly ...)
110 if(avctx->bits_per_sample == 4 && avctx->pix_fmt==PIX_FMT_PAL8 && !avctx->codec_tag){
112 for(i=256*2; i+1 < context->length>>1; i++){
113 context->buffer[2*i+0]= buf[i-256*2]>>4;
114 context->buffer[2*i+1]= buf[i-256*2]&15;
116 buf= context->buffer + 256*4;
117 buf_size= context->length - 256*4;
120 if(buf_size < context->length - (avctx->pix_fmt==PIX_FMT_PAL8 ? 256*4 : 0))
123 avpicture_fill(picture, buf, avctx->pix_fmt, avctx->width, avctx->height);
124 if(avctx->pix_fmt==PIX_FMT_PAL8 && buf_size < context->length){
125 frame->data[1]= context->buffer;
127 if (avctx->palctrl && avctx->palctrl->palette_changed) {
128 memcpy(frame->data[1], avctx->palctrl->palette, AVPALETTE_SIZE);
129 avctx->palctrl->palette_changed = 0;
132 flip(avctx, picture);
134 if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2'))
137 unsigned char *tmp = picture->data[1];
138 picture->data[1] = picture->data[2];
139 picture->data[2] = tmp;
142 *data_size = sizeof(AVPicture);
146 static int raw_close_decoder(AVCodecContext *avctx)
148 RawVideoContext *context = avctx->priv_data;
150 av_freep(&context->buffer);
154 AVCodec rawvideo_decoder = {
158 sizeof(RawVideoContext),