3 * Copyright (c) 2001 Fabrice Bellard.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 typedef struct RawVideoContext {
28 unsigned char * buffer; /* block of memory for holding one frame */
29 int length; /* number of bytes in buffer */
30 AVFrame pic; ///< AVCodecContext.coded_frame
33 typedef struct PixelFormatTag {
38 const PixelFormatTag pixelFormatTags[] = {
39 { PIX_FMT_YUV420P, MKTAG('I', '4', '2', '0') }, /* Planar formats */
40 { PIX_FMT_YUV420P, MKTAG('I', 'Y', 'U', 'V') },
41 { PIX_FMT_YUV420P, MKTAG('Y', 'V', '1', '2') },
42 { PIX_FMT_YUV410P, MKTAG('Y', 'U', 'V', '9') },
43 { PIX_FMT_YUV411P, MKTAG('Y', '4', '1', 'B') },
44 { PIX_FMT_YUV422P, MKTAG('Y', '4', '2', 'B') },
45 { PIX_FMT_GRAY8, MKTAG('Y', '8', '0', '0') },
46 { PIX_FMT_GRAY8, MKTAG(' ', ' ', 'Y', '8') },
49 { PIX_FMT_YUV422, MKTAG('Y', 'U', 'Y', '2') }, /* Packed formats */
50 { PIX_FMT_YUV422, MKTAG('Y', '4', '2', '2') },
51 { PIX_FMT_UYVY422, MKTAG('U', 'Y', 'V', 'Y') },
52 { PIX_FMT_GRAY8, MKTAG('G', 'R', 'E', 'Y') },
55 { PIX_FMT_UYVY422, MKTAG('2', 'v', 'u', 'y') },
60 static int findPixelFormat(unsigned int fourcc)
62 const PixelFormatTag * tags = pixelFormatTags;
63 while (tags->pix_fmt >= 0) {
64 if (tags->fourcc == fourcc)
68 return PIX_FMT_YUV420P;
71 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat fmt)
73 const PixelFormatTag * tags = pixelFormatTags;
74 while (tags->pix_fmt >= 0) {
75 if (tags->pix_fmt == fmt)
82 /* RAW Decoder Implementation */
84 static int raw_init_decoder(AVCodecContext *avctx)
86 RawVideoContext *context = avctx->priv_data;
89 avctx->pix_fmt = findPixelFormat(avctx->codec_tag);
90 else if (avctx->bits_per_sample){
91 switch(avctx->bits_per_sample){
92 case 8: avctx->pix_fmt= PIX_FMT_PAL8 ; break;
93 case 15: avctx->pix_fmt= PIX_FMT_RGB555; break;
94 case 16: avctx->pix_fmt= PIX_FMT_RGB565; break;
95 case 24: avctx->pix_fmt= PIX_FMT_BGR24 ; break;
96 case 32: avctx->pix_fmt= PIX_FMT_RGBA32; break;
100 context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
101 context->buffer = av_malloc(context->length);
102 context->pic.pict_type = FF_I_TYPE;
103 context->pic.key_frame = 1;
105 avctx->coded_frame= &context->pic;
107 if (!context->buffer)
113 static void flip(AVCodecContext *avctx, AVPicture * picture){
114 if(!avctx->codec_tag && avctx->bits_per_sample && picture->linesize[2]==0){
115 picture->data[0] += picture->linesize[0] * (avctx->height-1);
116 picture->linesize[0] *= -1;
120 static int raw_decode(AVCodecContext *avctx,
121 void *data, int *data_size,
122 uint8_t *buf, int buf_size)
124 RawVideoContext *context = avctx->priv_data;
126 AVFrame * frame = (AVFrame *) data;
127 AVPicture * picture = (AVPicture *) data;
129 frame->interlaced_frame = avctx->coded_frame->interlaced_frame;
130 frame->top_field_first = avctx->coded_frame->top_field_first;
132 if(buf_size < context->length - (avctx->pix_fmt==PIX_FMT_PAL8 ? 256*4 : 0))
135 avpicture_fill(picture, buf, avctx->pix_fmt, avctx->width, avctx->height);
136 if(avctx->pix_fmt==PIX_FMT_PAL8 && buf_size < context->length){
137 frame->data[1]= context->buffer;
139 if (avctx->palctrl && avctx->palctrl->palette_changed) {
140 memcpy(frame->data[1], avctx->palctrl->palette, AVPALETTE_SIZE);
141 avctx->palctrl->palette_changed = 0;
144 flip(avctx, picture);
146 if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2'))
149 unsigned char *tmp = picture->data[1];
150 picture->data[1] = picture->data[2];
151 picture->data[2] = tmp;
154 *data_size = sizeof(AVPicture);
158 static int raw_close_decoder(AVCodecContext *avctx)
160 RawVideoContext *context = avctx->priv_data;
162 av_freep(&context->buffer);
166 /* RAW Encoder Implementation */
168 static int raw_init_encoder(AVCodecContext *avctx)
170 avctx->coded_frame = (AVFrame *)avctx->priv_data;
171 avctx->coded_frame->pict_type = FF_I_TYPE;
172 avctx->coded_frame->key_frame = 1;
173 if(!avctx->codec_tag)
174 avctx->codec_tag = avcodec_pix_fmt_to_codec_tag(avctx->pix_fmt);
178 static int raw_encode(AVCodecContext *avctx,
179 unsigned char *frame, int buf_size, void *data)
181 return avpicture_layout((AVPicture *)data, avctx->pix_fmt, avctx->width,
182 avctx->height, frame, buf_size);
185 #ifdef CONFIG_RAWVIDEO_ENCODER
186 AVCodec rawvideo_encoder = {
194 #endif // CONFIG_RAWVIDEO_ENCODER
196 AVCodec rawvideo_decoder = {
200 sizeof(RawVideoContext),