* Cirrus Logic AccuPak (CLJR) codec
* Copyright (c) 2003 Alex Beregszaszi
*
- * 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
*/
/**
- * @file cljr.c
+ * @file
* Cirrus Logic AccuPak codec.
*/
#include "avcodec.h"
-#include "mpegvideo.h"
+#include "get_bits.h"
+#include "put_bits.h"
-typedef struct CLJRContext{
- AVCodecContext *avctx;
- AVFrame picture;
- int delta[16];
- int offset[4];
- GetBitContext gb;
+typedef struct CLJRContext {
+ AVFrame picture;
} CLJRContext;
+static av_cold int common_init(AVCodecContext *avctx)
+{
+ CLJRContext * const a = avctx->priv_data;
+
+ avctx->coded_frame = &a->picture;
+
+ return 0;
+}
+
+#if CONFIG_CLJR_DECODER
static int decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ AVPacket *avpkt)
{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
CLJRContext * const a = avctx->priv_data;
+ GetBitContext gb;
AVFrame *picture = data;
- AVFrame * const p= (AVFrame*)&a->picture;
+ AVFrame * const p = &a->picture;
int x, y;
- if(p->data[0])
+ if (p->data[0])
avctx->release_buffer(avctx, p);
- p->reference= 0;
- if(avctx->get_buffer(avctx, p) < 0){
+ if (avctx->height <= 0 || avctx->width <= 0) {
+ av_log(avctx, AV_LOG_ERROR, "Invalid width or height\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (buf_size / avctx->height < avctx->width) {
+ av_log(avctx, AV_LOG_ERROR,
+ "Resolution larger than buffer size. Invalid header?\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ p->reference = 0;
+ if (avctx->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;
-
- init_get_bits(&a->gb, buf, buf_size);
-
- for(y=0; y<avctx->height; y++){
- uint8_t *luma= &a->picture.data[0][ y*a->picture.linesize[0] ];
- uint8_t *cb= &a->picture.data[1][ y*a->picture.linesize[1] ];
- uint8_t *cr= &a->picture.data[2][ y*a->picture.linesize[2] ];
- for(x=0; x<avctx->width; x+=4){
- luma[3] = get_bits(&a->gb, 5) << 3;
- luma[2] = get_bits(&a->gb, 5) << 3;
- luma[1] = get_bits(&a->gb, 5) << 3;
- luma[0] = get_bits(&a->gb, 5) << 3;
- luma+= 4;
- *(cb++) = get_bits(&a->gb, 6) << 2;
- *(cr++) = get_bits(&a->gb, 6) << 2;
+ p->pict_type = AV_PICTURE_TYPE_I;
+ p->key_frame = 1;
+
+ init_get_bits(&gb, buf, buf_size * 8);
+
+ for (y = 0; y < avctx->height; y++) {
+ uint8_t *luma = &a->picture.data[0][y * a->picture.linesize[0]];
+ uint8_t *cb = &a->picture.data[1][y * a->picture.linesize[1]];
+ uint8_t *cr = &a->picture.data[2][y * a->picture.linesize[2]];
+ for (x = 0; x < avctx->width; x += 4) {
+ luma[3] = get_bits(&gb, 5) << 3;
+ luma[2] = get_bits(&gb, 5) << 3;
+ luma[1] = get_bits(&gb, 5) << 3;
+ luma[0] = get_bits(&gb, 5) << 3;
+ luma += 4;
+ *(cb++) = get_bits(&gb, 6) << 2;
+ *(cr++) = get_bits(&gb, 6) << 2;
}
}
- *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){
- CLJRContext * 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;
+static av_cold int decode_init(AVCodecContext *avctx)
+{
+ avctx->pix_fmt = PIX_FMT_YUV411P;
+ return common_init(avctx);
}
-#endif
-static void common_init(AVCodecContext *avctx){
- CLJRContext * const a = avctx->priv_data;
+static av_cold int decode_end(AVCodecContext *avctx)
+{
+ CLJRContext *a = avctx->priv_data;
- avctx->coded_frame= (AVFrame*)&a->picture;
- a->avctx= avctx;
+ if (a->picture.data[0])
+ avctx->release_buffer(avctx, &a->picture);
+ return 0;
}
-static int decode_init(AVCodecContext *avctx){
-
- common_init(avctx);
-
- avctx->pix_fmt= PIX_FMT_YUV411P;
+AVCodec ff_cljr_decoder = {
+ .name = "cljr",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_CLJR,
+ .priv_data_size = sizeof(CLJRContext),
+ .init = decode_init,
+ .close = decode_end,
+ .decode = decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
+};
+#endif
- return 0;
-}
+#if CONFIG_CLJR_ENCODER
+static int encode_frame(AVCodecContext *avctx, unsigned char *buf,
+ int buf_size, void *data)
+{
+ PutBitContext pb;
+ AVFrame *p = data;
+ int x, y;
-#if 0
-static int encode_init(AVCodecContext *avctx){
+ p->pict_type = AV_PICTURE_TYPE_I;
+ p->key_frame = 1;
+
+ init_put_bits(&pb, buf, buf_size / 8);
+
+ for (y = 0; y < avctx->height; y++) {
+ uint8_t *luma = &p->data[0][y * p->linesize[0]];
+ uint8_t *cb = &p->data[1][y * p->linesize[1]];
+ uint8_t *cr = &p->data[2][y * p->linesize[2]];
+ for (x = 0; x < avctx->width; x += 4) {
+ put_bits(&pb, 5, luma[3] >> 3);
+ put_bits(&pb, 5, luma[2] >> 3);
+ put_bits(&pb, 5, luma[1] >> 3);
+ put_bits(&pb, 5, luma[0] >> 3);
+ luma += 4;
+ put_bits(&pb, 6, *(cb++) >> 2);
+ put_bits(&pb, 6, *(cr++) >> 2);
+ }
+ }
- common_init(avctx);
+ flush_put_bits(&pb);
- return 0;
+ return put_bits_count(&pb) / 8;
}
-#endif
-AVCodec cljr_decoder = {
- "cljr",
- CODEC_TYPE_VIDEO,
- CODEC_ID_CLJR,
- sizeof(CLJRContext),
- decode_init,
- NULL,
- NULL,
- decode_frame,
- CODEC_CAP_DR1,
+AVCodec ff_cljr_encoder = {
+ .name = "cljr",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_CLJR,
+ .priv_data_size = sizeof(CLJRContext),
+ .init = common_init,
+ .encode = encode_frame,
+ .pix_fmts = (const enum PixelFormat[]) { PIX_FMT_YUV411P,
+ PIX_FMT_NONE },
+ .long_name = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
};
-#if 0
-#ifdef CONFIG_ENCODERS
-
-AVCodec cljr_encoder = {
- "cljr",
- CODEC_TYPE_VIDEO,
- CODEC_ID_cljr,
- sizeof(CLJRContext),
- encode_init,
- encode_frame,
- //encode_end,
-};
-
-#endif //CONFIG_ENCODERS
#endif
projects / ffmpeg / blobdiff