* ATI VCR1 codec
* Copyright (c) 2003 Michael Niedermayer
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-
+
/**
- * @file vcr1.c
- * ati vcr1 codec.
+ * @file
+ * ATI VCR1 codec
*/
-
-#include "avcodec.h"
-#include "mpegvideo.h"
-//#undef NDEBUG
-//#include <assert.h>
+#include "avcodec.h"
+#include "dsputil.h"
+#include "internal.h"
+#include "libavutil/internal.h"
-typedef struct VCR1Context{
- AVCodecContext *avctx;
+typedef struct VCR1Context {
AVFrame picture;
int delta[16];
int offset[4];
} VCR1Context;
-static int decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
+static av_cold int vcr1_common_init(AVCodecContext *avctx)
{
- VCR1Context * const a = avctx->priv_data;
- AVFrame *picture = data;
- AVFrame * const p= (AVFrame*)&a->picture;
- uint8_t *bytestream= buf;
- int i, x, y;
+ VCR1Context *const a = avctx->priv_data;
- *data_size = 0;
+ avctx->coded_frame = &a->picture;
- /* special case for last picture */
- if (buf_size == 0) {
- return 0;
- }
+ return 0;
+}
+
+static av_cold int vcr1_decode_init(AVCodecContext *avctx)
+{
+ vcr1_common_init(avctx);
- if(p->data[0])
+ avctx->pix_fmt = AV_PIX_FMT_YUV410P;
+
+ return 0;
+}
+
+static av_cold int vcr1_decode_end(AVCodecContext *avctx)
+{
+ VCR1Context *s = avctx->priv_data;
+
+ if (s->picture.data[0])
+ avctx->release_buffer(avctx, &s->picture);
+
+ return 0;
+}
+
+static int vcr1_decode_frame(AVCodecContext *avctx, void *data,
+ int *data_size, AVPacket *avpkt)
+{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ VCR1Context *const a = avctx->priv_data;
+ AVFrame *picture = data;
+ AVFrame *const p = &a->picture;
+ const uint8_t *bytestream = buf;
+ int i, x, y;
+
+ if (p->data[0])
avctx->release_buffer(avctx, p);
- p->reference= 0;
- if(avctx->get_buffer(avctx, p) < 0){
- fprintf(stderr, "get_buffer() failed\n");
+ p->reference = 0;
+ if (ff_get_buffer(avctx, p) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
- p->pict_type= I_TYPE;
- p->key_frame= 1;
+ p->pict_type = AV_PICTURE_TYPE_I;
+ p->key_frame = 1;
- for(i=0; i<16; i++){
- a->delta[i]= *(bytestream++);
+ for (i = 0; i < 16; i++) {
+ a->delta[i] = *bytestream++;
bytestream++;
}
-
- for(y=0; y<avctx->height; y++){
+
+ for (y = 0; y < avctx->height; y++) {
int offset;
- uint8_t *luma= &a->picture.data[0][ y*a->picture.linesize[0] ];
-
- if((y&3) == 0){
- uint8_t *cb= &a->picture.data[1][ (y>>2)*a->picture.linesize[1] ];
- uint8_t *cr= &a->picture.data[2][ (y>>2)*a->picture.linesize[2] ];
-
- for(i=0; i<4; i++)
- a->offset[i]= *(bytestream++);
-
- offset= a->offset[0] - a->delta[ bytestream[2]&0xF ];
- for(x=0; x<avctx->width; x+=4){
- luma[0]=( offset += a->delta[ bytestream[2]&0xF ]);
- luma[1]=( offset += a->delta[ bytestream[2]>>4 ]);
- luma[2]=( offset += a->delta[ bytestream[0]&0xF ]);
- luma[3]=( offset += a->delta[ bytestream[0]>>4 ]);
- luma += 4;
-
- *(cb++) = bytestream[3];
- *(cr++) = bytestream[1];
-
- bytestream+= 4;
+ uint8_t *luma = &a->picture.data[0][y * a->picture.linesize[0]];
+
+ if ((y & 3) == 0) {
+ uint8_t *cb = &a->picture.data[1][(y >> 2) * a->picture.linesize[1]];
+ uint8_t *cr = &a->picture.data[2][(y >> 2) * a->picture.linesize[2]];
+
+ for (i = 0; i < 4; i++)
+ a->offset[i] = *bytestream++;
+
+ offset = a->offset[0] - a->delta[bytestream[2] & 0xF];
+ for (x = 0; x < avctx->width; x += 4) {
+ luma[0] = offset += a->delta[bytestream[2] & 0xF];
+ luma[1] = offset += a->delta[bytestream[2] >> 4];
+ luma[2] = offset += a->delta[bytestream[0] & 0xF];
+ luma[3] = offset += a->delta[bytestream[0] >> 4];
+ luma += 4;
+
+ *cb++ = bytestream[3];
+ *cr++ = bytestream[1];
+
+ bytestream += 4;
}
- }else{
- offset= a->offset[y&3] - a->delta[ bytestream[2]&0xF ];
-
- for(x=0; x<avctx->width; x+=8){
- luma[0]=( offset += a->delta[ bytestream[2]&0xF ]);
- luma[1]=( offset += a->delta[ bytestream[2]>>4 ]);
- luma[2]=( offset += a->delta[ bytestream[3]&0xF ]);
- luma[3]=( offset += a->delta[ bytestream[3]>>4 ]);
- luma[4]=( offset += a->delta[ bytestream[0]&0xF ]);
- luma[5]=( offset += a->delta[ bytestream[0]>>4 ]);
- luma[6]=( offset += a->delta[ bytestream[1]&0xF ]);
- luma[7]=( offset += a->delta[ bytestream[1]>>4 ]);
- luma += 8;
- bytestream+= 4;
+ } else {
+ offset = a->offset[y & 3] - a->delta[bytestream[2] & 0xF];
+
+ for (x = 0; x < avctx->width; x += 8) {
+ luma[0] = offset += a->delta[bytestream[2] & 0xF];
+ luma[1] = offset += a->delta[bytestream[2] >> 4];
+ luma[2] = offset += a->delta[bytestream[3] & 0xF];
+ luma[3] = offset += a->delta[bytestream[3] >> 4];
+ luma[4] = offset += a->delta[bytestream[0] & 0xF];
+ luma[5] = offset += a->delta[bytestream[0] >> 4];
+ luma[6] = offset += a->delta[bytestream[1] & 0xF];
+ luma[7] = offset += a->delta[bytestream[1] >> 4];
+ luma += 8;
+ bytestream += 4;
}
}
}
- *picture= *(AVFrame*)&a->picture;
+ *picture = a->picture;
*data_size = sizeof(AVPicture);
- emms_c();
-
return buf_size;
}
-#if 0
-static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
- VCR1Context * const a = avctx->priv_data;
- AVFrame *pict = data;
- AVFrame * const p= (AVFrame*)&a->picture;
- int size;
- int mb_x, mb_y;
-
- *p = *pict;
- p->pict_type= I_TYPE;
- p->key_frame= 1;
-
- emms_c();
-
- align_put_bits(&a->pb);
- while(get_bit_count(&a->pb)&31)
- put_bits(&a->pb, 8, 0);
-
- size= get_bit_count(&a->pb)/32;
-
- return size*4;
-}
-#endif
+AVCodec ff_vcr1_decoder = {
+ .name = "vcr1",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_VCR1,
+ .priv_data_size = sizeof(VCR1Context),
+ .init = vcr1_decode_init,
+ .close = vcr1_decode_end,
+ .decode = vcr1_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("ATI VCR1"),
+};
-static void common_init(AVCodecContext *avctx){
- VCR1Context * const a = avctx->priv_data;
+/* Disable the encoder. */
+#undef CONFIG_VCR1_ENCODER
+#define CONFIG_VCR1_ENCODER 0
- avctx->coded_frame= (AVFrame*)&a->picture;
- a->avctx= avctx;
-}
+#if CONFIG_VCR1_ENCODER
-static int decode_init(AVCodecContext *avctx){
-
- common_init(avctx);
-
- avctx->pix_fmt= PIX_FMT_YUV410P;
+#include "put_bits.h"
- return 0;
-}
+static int vcr1_encode_frame(AVCodecContext *avctx, unsigned char *buf,
+ int buf_size, void *data)
+{
+ VCR1Context *const a = avctx->priv_data;
+ AVFrame *pict = data;
+ AVFrame *const p = &a->picture;
+ int size;
-static int encode_init(AVCodecContext *avctx){
-
- common_init(avctx);
-
- return 0;
-}
+ *p = *pict;
+ p->pict_type = AV_PICTURE_TYPE_I;
+ p->key_frame = 1;
-static int decode_end(AVCodecContext *avctx){
+ avpriv_align_put_bits(&a->pb);
+ flush_put_bits(&a->pb);
- avcodec_default_free_buffers(avctx);
+ size = put_bits_count(&a->pb) / 32;
- return 0;
+ return size * 4;
}
-AVCodec vcr1_decoder = {
- "vcr1",
- CODEC_TYPE_VIDEO,
- CODEC_ID_VCR1,
- sizeof(VCR1Context),
- decode_init,
- NULL,
- decode_end,
- decode_frame,
- CODEC_CAP_DR1,
+AVCodec ff_vcr1_encoder = {
+ .name = "vcr1",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_VCR1,
+ .priv_data_size = sizeof(VCR1Context),
+ .init = vcr1_common_init,
+ .encode = vcr1_encode_frame,
+ .long_name = NULL_IF_CONFIG_SMALL("ATI VCR1"),
};
-#if 0
-#ifdef CONFIG_ENCODERS
-
-AVCodec vcr1_encoder = {
- "vcr1",
- CODEC_TYPE_VIDEO,
- CODEC_ID_VCR1,
- sizeof(VCR1Context),
- encode_init,
- encode_frame,
- //encode_end,
-};
-
-#endif //CONFIG_ENCODERS
-#endif
+#endif /* CONFIG_VCR1_ENCODER */
projects / ffmpeg / blobdiff