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mpeg4videodec: move MpegEncContext.time_increment_bits to Mpeg4DecContext

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The field remains in MpegEncContext for use in the encoder.
This commit is contained in:
Anton Khirnov 2013-11-26 11:23:16 +01:00
parent ee8af2dd99
commit e62a43f6b1
4 changed files with 23 additions and 19 deletions
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2
libavcodec/mpeg4video.h
View File

@ -62,6 +62,8 @@
typedef struct Mpeg4DecContext {
MpegEncContext m;
///< number of bits to represent the fractional part of time
int time_increment_bits;
int shape;
} Mpeg4DecContext;

33
libavcodec/mpeg4videodec.c
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@ -432,7 +432,7 @@ int ff_mpeg4_decode_video_packet_header(Mpeg4DecContext *ctx)
time_incr++;
check_marker(&s->gb, "before time_increment in video packed header");
skip_bits(&s->gb, s->time_increment_bits); /* time_increment */
skip_bits(&s->gb, ctx->time_increment_bits); /* time_increment */
check_marker(&s->gb, "before vop_coding_type in video packed header");
skip_bits(&s->gb, 2); /* vop coding type */
@ -1719,14 +1719,14 @@ static int decode_vol_header(Mpeg4DecContext *ctx, GetBitContext *gb)
return -1;
}
s->time_increment_bits = av_log2(s->avctx->time_base.den - 1) + 1;
if (s->time_increment_bits < 1)
s->time_increment_bits = 1;
ctx->time_increment_bits = av_log2(s->avctx->time_base.den - 1) + 1;
if (ctx->time_increment_bits < 1)
ctx->time_increment_bits = 1;
check_marker(gb, "before fixed_vop_rate");
if (get_bits1(gb) != 0) /* fixed_vop_rate */
s->avctx->time_base.num = get_bits(gb, s->time_increment_bits);
s->avctx->time_base.num = get_bits(gb, ctx->time_increment_bits);
else
s->avctx->time_base.num = 1;
@ -2065,31 +2065,31 @@ static int decode_vop_header(Mpeg4DecContext *ctx, GetBitContext *gb)
check_marker(gb, "before time_increment");
if (s->time_increment_bits == 0 ||
!(show_bits(gb, s->time_increment_bits + 1) & 1)) {
if (ctx->time_increment_bits == 0 ||
!(show_bits(gb, ctx->time_increment_bits + 1) & 1)) {
av_log(s->avctx, AV_LOG_ERROR,
"hmm, seems the headers are not complete, trying to guess time_increment_bits\n");
for (s->time_increment_bits = 1;
s->time_increment_bits < 16;
s->time_increment_bits++) {
for (ctx->time_increment_bits = 1;
ctx->time_increment_bits < 16;
ctx->time_increment_bits++) {
if (s->pict_type == AV_PICTURE_TYPE_P ||
(s->pict_type == AV_PICTURE_TYPE_S &&
s->vol_sprite_usage == GMC_SPRITE)) {
if ((show_bits(gb, s->time_increment_bits + 6) & 0x37) == 0x30)
if ((show_bits(gb, ctx->time_increment_bits + 6) & 0x37) == 0x30)
break;
} else if ((show_bits(gb, s->time_increment_bits + 5) & 0x1F) == 0x18)
} else if ((show_bits(gb, ctx->time_increment_bits + 5) & 0x1F) == 0x18)
break;
}
av_log(s->avctx, AV_LOG_ERROR,
"my guess is %d bits ;)\n", s->time_increment_bits);
"my guess is %d bits ;)\n", ctx->time_increment_bits);
}
if (IS_3IV1)
time_increment = get_bits1(gb); // FIXME investigate further
else
time_increment = get_bits(gb, s->time_increment_bits);
time_increment = get_bits(gb, ctx->time_increment_bits);
if (s->pict_type != AV_PICTURE_TYPE_B) {
s->last_time_base = s->time_base;
@ -2413,7 +2413,8 @@ static int mpeg4_update_thread_context(AVCodecContext *dst,
if (ret < 0)
return ret;
s->shape = s1->shape;
s->shape = s1->shape;
s->time_increment_bits = s1->time_increment_bits;
return 0;
}
@ -2459,7 +2460,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
s->h263_pred = 1;
s->low_delay = 0; /* default, might be overriden in the vol header during header parsing */
s->decode_mb = mpeg4_decode_mb;
s->time_increment_bits = 4; /* default value for broken headers */
ctx->time_increment_bits = 4; /* default value for broken headers */
avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
avctx->internal->allocate_progress = 1;

4
libavcodec/mpegvideo.c
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@ -716,9 +716,9 @@ do {\
s->workaround_bugs = s1->workaround_bugs;
// MPEG4 timing info
memcpy(&s->time_increment_bits, &s1->time_increment_bits,
memcpy(&s->last_time_base, &s1->last_time_base,
(char *) &s1->pb_field_time + sizeof(s1->pb_field_time) -
(char *) &s1->time_increment_bits);
(char *) &s1->last_time_base);
// B-frame info
s->max_b_frames = s1->max_b_frames;

3
libavcodec/mpegvideo.h
View File

@ -569,7 +569,8 @@ typedef struct MpegEncContext {
int custom_pcf;
/* mpeg4 specific */
int time_increment_bits; ///< number of bits to represent the fractional part of time
///< number of bits to represent the fractional part of time (encoder only)
int time_increment_bits;
int last_time_base;
int time_base; ///< time in seconds of last I,P,S Frame
int64_t time; ///< time of current frame