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lavc/ccaption_dec: remove usage of avctx->time_base

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lavc/utils already rescales avpkt->pts to sub->pts in AV_TIME_BASE_Q
before calling the decode callback. This prevents from rescaling again
into the decoder, and avoid the use of avctx->time_base which will
disappear in the incoming codecpar merge.

This commit also replaces the use of "20 centisecond" (ass time base)
with "200 ms".
This commit is contained in:
Clément Bœsch 2016-03-28 14:10:08 +02:00
parent e8a9b64410
commit d8620158c7
1 changed files with 8 additions and 7 deletions
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15
libavcodec/ccaption_dec.c
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@ -30,7 +30,7 @@
#define UNSET_FLAG(var, val) ( (var) &= ~( 1 << (val)) )
#define CHECK_FLAG(var, val) ( (var) & ( 1 << (val)) )
static const AVRational ass_tb = {1, 100};
static const AVRational ms_tb = {1, 1000};
/*
* TODO list
@ -723,6 +723,7 @@ static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avp
{
CCaptionSubContext *ctx = avctx->priv_data;
AVSubtitle *sub = data;
const int64_t start_time = sub->pts;
uint8_t *bptr = NULL;
int len = avpkt->size;
int ret = 0;
@ -747,7 +748,7 @@ static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avp
if(cc_type == 1)
continue;
else
process_cc608(ctx, avpkt->pts, *(bptr + i + 1) & 0x7f, *(bptr + i + 2) & 0x7f);
process_cc608(ctx, start_time, *(bptr + i + 1) & 0x7f, *(bptr + i + 2) & 0x7f);
if (!ctx->buffer_changed)
continue;
@ -759,21 +760,21 @@ static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avp
ret = ff_ass_add_rect(sub, ctx->buffer.str, ctx->readorder++, 0, NULL, NULL);
if (ret < 0)
return ret;
sub->pts = av_rescale_q(ctx->start_time, avctx->time_base, AV_TIME_BASE_Q);
sub->pts = ctx->start_time;
if (!ctx->real_time)
sub->end_display_time = av_rescale_q(ctx->end_time - ctx->start_time,
avctx->time_base, av_make_q(1, 1000));
AV_TIME_BASE_Q, ms_tb);
else
sub->end_display_time = -1;
ctx->buffer_changed = 0;
ctx->last_real_time = avpkt->pts;
ctx->last_real_time = sub->pts;
ctx->screen_touched = 0;
}
}
if (ctx->real_time && ctx->screen_touched &&
avpkt->pts > ctx->last_real_time + av_rescale_q(20, ass_tb, avctx->time_base)) {
ctx->last_real_time = avpkt->pts;
sub->pts > ctx->last_real_time + av_rescale_q(200, ms_tb, AV_TIME_BASE_Q)) {
ctx->last_real_time = sub->pts;
ctx->screen_touched = 0;
capture_screen(ctx);