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authorAlex Beregszaszi <alex@rtfs.hu>2003-07-27 20:20:31 +0000
committerAlex Beregszaszi <alex@rtfs.hu>2003-07-27 20:20:31 +0000
commit3aff069b580503c1a21315e9fe539d02f210648d (patch)
tree2f92ba3f25ac5ee43bb77bea7542a00b86f9d3d3
parentf23a68dff367ef9a397dda17aaebf189934179b9 (diff)
downloadffmpeg-3aff069b580503c1a21315e9fe539d02f210648d.tar.gz
CLJR decoding support
Originally committed as revision 2090 to svn://svn.ffmpeg.org/ffmpeg/trunk
-rw-r--r--libavcodec/Makefile2
-rw-r--r--libavcodec/allcodecs.c1
-rw-r--r--libavcodec/avcodec.h2
-rw-r--r--libavcodec/cljr.c177
4 files changed, 181 insertions, 1 deletions
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 8d48d97996..de2b970f18 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -17,7 +17,7 @@ OBJS= common.o utils.o mem.o allcodecs.o \
mpeg12.o mpegaudiodec.o pcm.o simple_idct.o \
ratecontrol.o adpcm.o eval.o dv.o error_resilience.o \
fft.o mdct.o mace.o huffyuv.o cyuv.o opts.o raw.o h264.o golomb.o \
- vp3.o asv1.o 4xm.o cabac.o ffv1.o ra144.o ra288.o vcr1.o
+ vp3.o asv1.o 4xm.o cabac.o ffv1.o ra144.o ra288.o vcr1.o cljr.o
ifeq ($(AMR_NB),yes)
ifeq ($(AMR_NB_FIXED),yes)
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index c364f228da..f14844200d 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -114,6 +114,7 @@ void avcodec_register_all(void)
register_avcodec(&vp3_decoder);
register_avcodec(&asv1_decoder);
register_avcodec(&vcr1_decoder);
+ register_avcodec(&cljr_decoder);
register_avcodec(&fourxm_decoder);
#ifdef CONFIG_AC3
register_avcodec(&ac3_decoder);
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 329fa4cba1..e61dd43a46 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -62,6 +62,7 @@ enum CodecID {
CODEC_ID_FFV1,
CODEC_ID_4XM,
CODEC_ID_VCR1,
+ CODEC_ID_CLJR,
/* various pcm "codecs" */
CODEC_ID_PCM_S16LE,
@@ -1307,6 +1308,7 @@ extern AVCodec aac_decoder;
extern AVCodec mpeg4aac_decoder;
extern AVCodec asv1_decoder;
extern AVCodec vcr1_decoder;
+extern AVCodec cljr_decoder;
extern AVCodec ffv1_decoder;
extern AVCodec fourxm_decoder;
extern AVCodec ra_144_decoder;
diff --git a/libavcodec/cljr.c b/libavcodec/cljr.c
new file mode 100644
index 0000000000..4611d61004
--- /dev/null
+++ b/libavcodec/cljr.c
@@ -0,0 +1,177 @@
+/*
+ * Cirrus Logic AccuPak (CLJR) codec
+ * Copyright (c) 2003 Alex Beregszaszi
+ *
+ * This library 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.
+ *
+ * This library 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
+ *
+ */
+
+/**
+ * @file cljr.c
+ * Cirrus Logic AccuPak codec.
+ */
+
+#include "avcodec.h"
+#include "mpegvideo.h"
+
+typedef struct CLJRContext{
+ AVCodecContext *avctx;
+ AVFrame picture;
+ int delta[16];
+ int offset[4];
+ GetBitContext gb;
+} CLJRContext;
+
+static int decode_frame(AVCodecContext *avctx,
+ void *data, int *data_size,
+ uint8_t *buf, int buf_size)
+{
+ CLJRContext * const a = avctx->priv_data;
+ AVFrame *picture = data;
+ AVFrame * const p= (AVFrame*)&a->picture;
+ uint8_t *bytestream= buf;
+ int i, x, y;
+
+ *data_size = 0;
+
+ /* special case for last picture */
+ if (buf_size == 0) {
+ return 0;
+ }
+
+ 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");
+ 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++){
+ int offset;
+ uint8_t *luma= &a->picture.data[0][ y*a->picture.linesize[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(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;
+ }
+ }
+
+ *picture= *(AVFrame*)&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;
+}
+#endif
+
+static void common_init(AVCodecContext *avctx){
+ CLJRContext * const a = avctx->priv_data;
+
+ avctx->coded_frame= (AVFrame*)&a->picture;
+ a->avctx= avctx;
+}
+
+static int decode_init(AVCodecContext *avctx){
+ CLJRContext * const a = avctx->priv_data;
+ AVFrame *p= (AVFrame*)&a->picture;
+ int i;
+
+ common_init(avctx);
+
+ avctx->pix_fmt= PIX_FMT_YUV410P;
+
+ return 0;
+}
+
+static int encode_init(AVCodecContext *avctx){
+ CLJRContext * const a = avctx->priv_data;
+ int i;
+
+ common_init(avctx);
+
+ return 0;
+}
+
+static int decode_end(AVCodecContext *avctx){
+ CLJRContext * const a = avctx->priv_data;
+
+ avcodec_default_free_buffers(avctx);
+
+ return 0;
+}
+
+AVCodec cljr_decoder = {
+ "cljr",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_CLJR,
+ sizeof(CLJRContext),
+ decode_init,
+ NULL,
+ decode_end,
+ decode_frame,
+ CODEC_CAP_DR1,
+};
+#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