3 * Copyright (c) 2003 Michael Niedermayer
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
33 /* Disable the encoder. */
34 #undef CONFIG_VCR1_ENCODER
35 #define CONFIG_VCR1_ENCODER 0
37 typedef struct VCR1Context{
38 AVCodecContext *avctx;
44 static int decode_frame(AVCodecContext *avctx,
45 void *data, int *data_size,
48 const uint8_t *buf = avpkt->data;
49 int buf_size = avpkt->size;
50 VCR1Context * const a = avctx->priv_data;
51 AVFrame *picture = data;
52 AVFrame * const p= (AVFrame*)&a->picture;
53 const uint8_t *bytestream= buf;
57 avctx->release_buffer(avctx, p);
60 if(avctx->get_buffer(avctx, p) < 0){
61 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
64 p->pict_type= AV_PICTURE_TYPE_I;
68 a->delta[i]= *(bytestream++);
72 for(y=0; y<avctx->height; y++){
74 uint8_t *luma= &a->picture.data[0][ y*a->picture.linesize[0] ];
77 uint8_t *cb= &a->picture.data[1][ (y>>2)*a->picture.linesize[1] ];
78 uint8_t *cr= &a->picture.data[2][ (y>>2)*a->picture.linesize[2] ];
81 a->offset[i]= *(bytestream++);
83 offset= a->offset[0] - a->delta[ bytestream[2]&0xF ];
84 for(x=0; x<avctx->width; x+=4){
85 luma[0]=( offset += a->delta[ bytestream[2]&0xF ]);
86 luma[1]=( offset += a->delta[ bytestream[2]>>4 ]);
87 luma[2]=( offset += a->delta[ bytestream[0]&0xF ]);
88 luma[3]=( offset += a->delta[ bytestream[0]>>4 ]);
91 *(cb++) = bytestream[3];
92 *(cr++) = bytestream[1];
97 offset= a->offset[y&3] - a->delta[ bytestream[2]&0xF ];
99 for(x=0; x<avctx->width; x+=8){
100 luma[0]=( offset += a->delta[ bytestream[2]&0xF ]);
101 luma[1]=( offset += a->delta[ bytestream[2]>>4 ]);
102 luma[2]=( offset += a->delta[ bytestream[3]&0xF ]);
103 luma[3]=( offset += a->delta[ bytestream[3]>>4 ]);
104 luma[4]=( offset += a->delta[ bytestream[0]&0xF ]);
105 luma[5]=( offset += a->delta[ bytestream[0]>>4 ]);
106 luma[6]=( offset += a->delta[ bytestream[1]&0xF ]);
107 luma[7]=( offset += a->delta[ bytestream[1]>>4 ]);
114 *picture= *(AVFrame*)&a->picture;
115 *data_size = sizeof(AVPicture);
122 #if CONFIG_VCR1_ENCODER
123 static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
124 VCR1Context * const a = avctx->priv_data;
125 AVFrame *pict = data;
126 AVFrame * const p= (AVFrame*)&a->picture;
130 p->pict_type= AV_PICTURE_TYPE_I;
135 align_put_bits(&a->pb);
136 while(get_bit_count(&a->pb)&31)
137 put_bits(&a->pb, 8, 0);
139 size= get_bit_count(&a->pb)/32;
145 static av_cold void common_init(AVCodecContext *avctx){
146 VCR1Context * const a = avctx->priv_data;
148 avctx->coded_frame= (AVFrame*)&a->picture;
149 avcodec_get_frame_defaults(&a->picture);
153 static av_cold int decode_init(AVCodecContext *avctx){
157 avctx->pix_fmt= PIX_FMT_YUV410P;
162 static av_cold int decode_end(AVCodecContext *avctx){
163 VCR1Context *s = avctx->priv_data;
165 if (s->picture.data[0])
166 avctx->release_buffer(avctx, &s->picture);
171 #if CONFIG_VCR1_ENCODER
172 static av_cold int encode_init(AVCodecContext *avctx){
180 AVCodec ff_vcr1_decoder = {
182 .type = AVMEDIA_TYPE_VIDEO,
184 .priv_data_size = sizeof(VCR1Context),
187 .decode = decode_frame,
188 .capabilities = CODEC_CAP_DR1,
189 .long_name = NULL_IF_CONFIG_SMALL("ATI VCR1"),
192 #if CONFIG_VCR1_ENCODER
193 AVCodec ff_vcr1_encoder = {
195 .type = AVMEDIA_TYPE_VIDEO,
197 .priv_data_size = sizeof(VCR1Context),
199 .encode = encode_frame,
200 .long_name = NULL_IF_CONFIG_SMALL("ATI VCR1"),