videolan/ffmpeg
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grayscale only decoding

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Originally committed as revision 677 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2002-06-09 13:35:56 +00:00
parent 800d7cebb6
commit b50eef3ae0
3 changed files with 26 additions and 8 deletions
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6
libavcodec/avcodec.h
View File

@ -5,8 +5,8 @@
#define LIBAVCODEC_VERSION_INT 0x000406
#define LIBAVCODEC_VERSION "0.4.6"
#define LIBAVCODEC_BUILD 4613
#define LIBAVCODEC_BUILD_STR "4613"
#define LIBAVCODEC_BUILD 4614
#define LIBAVCODEC_BUILD_STR "4614"
enum CodecID {
CODEC_ID_NONE,
@ -23,6 +23,7 @@ enum CodecID {
CODEC_ID_MSMPEG4V2,
CODEC_ID_MSMPEG4V3,
CODEC_ID_WMV1,
CODEC_ID_WMV2,
CODEC_ID_H263P,
CODEC_ID_H263I,
@ -97,6 +98,7 @@ static const int Motion_Est_QTab[] = { ME_ZERO, ME_PHODS, ME_LOG,
#define CODEC_FLAG_PASS1 0x0200 /* use internal 2pass ratecontrol in first pass mode */
#define CODEC_FLAG_PASS2 0x0400 /* use internal 2pass ratecontrol in second pass mode */
#define CODEC_FLAG_EXTERN_HUFF 0x1000 /* use external huffman table (for mjpeg) */
#define CODEC_FLAG_GRAY 0x2000 /* only decode/encode grayscale */
/* codec capabilities */

1
libavcodec/h263dec.c
View File

@ -124,6 +124,7 @@ uint64_t time= rdtsc();
s->hurry_up= avctx->hurry_up;
s->error_resilience= avctx->error_resilience;
s->workaround_bugs= avctx->workaround_bugs;
s->flags= avctx->flags;
/* no supplementary picture */
if (buf_size == 0) {

27
libavcodec/mpegvideo.c
View File

@ -155,10 +155,12 @@ int MPV_common_init(MpegEncContext *s)
CHECKED_ALLOCZ(pict, c_size)
s->last_picture_base[i] = pict;
s->last_picture[i] = pict + pict_start;
if(i>0) memset(s->last_picture_base[i], 128, c_size);
CHECKED_ALLOCZ(pict, c_size)
s->next_picture_base[i] = pict;
s->next_picture[i] = pict + pict_start;
if(i>0) memset(s->next_picture_base[i], 128, c_size);
if (s->has_b_frames || s->codec_id==CODEC_ID_MPEG4) {
/* Note the MPEG4 stuff is here cuz of buggy encoders which dont set the low_delay flag but
@ -166,6 +168,7 @@ int MPV_common_init(MpegEncContext *s)
CHECKED_ALLOCZ(pict, c_size)
s->aux_picture_base[i] = pict;
s->aux_picture[i] = pict + pict_start;
if(i>0) memset(s->aux_picture_base[i], 128, c_size);
}
}
@ -886,6 +889,8 @@ if(s->quarter_sample)
pix_op[dxy](dest_y, ptr, linesize, h);
pix_op[dxy](dest_y + 8, ptr + 8, linesize, h);
if(s->flags&CODEC_FLAG_GRAY) return;
if (s->out_format == FMT_H263) {
dxy = 0;
if ((motion_x & 3) != 0)
@ -949,6 +954,8 @@ static inline void qpel_motion(MpegEncContext *s,
qpix_op[dxy](dest_y + linesize*8 , ptr + linesize*8 , linesize, linesize, motion_x&3, motion_y&3);
qpix_op[dxy](dest_y + linesize*8 + 8, ptr + linesize*8 + 8, linesize, linesize, motion_x&3, motion_y&3);
if(s->flags&CODEC_FLAG_GRAY) return;
mx= (motion_x>>1) | (motion_x&1);
my= (motion_y>>1) | (motion_y&1);
@ -1037,6 +1044,8 @@ static inline void MPV_motion(MpegEncContext *s,
dest = dest_y + ((i & 1) * 8) + (i >> 1) * 8 * s->linesize;
pix_op[dxy](dest, ptr, s->linesize, 8);
}
if(s->flags&CODEC_FLAG_GRAY) break;
/* In case of 8X8, we construct a single chroma motion vector
with a special rounding */
mx = 0;
@ -1292,16 +1301,20 @@ void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
add_dequant_dct(s, block[2], 2, dest_y + dct_offset, dct_linesize);
add_dequant_dct(s, block[3], 3, dest_y + dct_offset + 8, dct_linesize);
add_dequant_dct(s, block[4], 4, dest_cb, s->linesize >> 1);
add_dequant_dct(s, block[5], 5, dest_cr, s->linesize >> 1);
if(!(s->flags&CODEC_FLAG_GRAY)){
add_dequant_dct(s, block[4], 4, dest_cb, s->linesize >> 1);
add_dequant_dct(s, block[5], 5, dest_cr, s->linesize >> 1);
}
} else {
add_dct(s, block[0], 0, dest_y, dct_linesize);
add_dct(s, block[1], 1, dest_y + 8, dct_linesize);
add_dct(s, block[2], 2, dest_y + dct_offset, dct_linesize);
add_dct(s, block[3], 3, dest_y + dct_offset + 8, dct_linesize);
add_dct(s, block[4], 4, dest_cb, s->linesize >> 1);
add_dct(s, block[5], 5, dest_cr, s->linesize >> 1);
if(!(s->flags&CODEC_FLAG_GRAY)){
add_dct(s, block[4], 4, dest_cb, s->linesize >> 1);
add_dct(s, block[5], 5, dest_cr, s->linesize >> 1);
}
}
} else {
/* dct only in intra block */
@ -1310,8 +1323,10 @@ void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
put_dct(s, block[2], 2, dest_y + dct_offset, dct_linesize);
put_dct(s, block[3], 3, dest_y + dct_offset + 8, dct_linesize);
put_dct(s, block[4], 4, dest_cb, s->linesize >> 1);
put_dct(s, block[5], 5, dest_cr, s->linesize >> 1);
if(!(s->flags&CODEC_FLAG_GRAY)){
put_dct(s, block[4], 4, dest_cb, s->linesize >> 1);
put_dct(s, block[5], 5, dest_cr, s->linesize >> 1);
}
}
}
the_end: