From f9e55c0fed8ca7c8d3df4a3dfb1b3664209bd1dd Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 22 Dec 2012 23:53:45 +0100 Subject: swr: support -async X as a simple way to do what ffmpeg -async X did Signed-off-by: Michael Niedermayer --- libswresample/swresample.c | 10 ++++++++++ libswresample/swresample_internal.h | 1 + 2 files changed, 11 insertions(+) (limited to 'libswresample') diff --git a/libswresample/swresample.c b/libswresample/swresample.c index af983a1b4e..5caab4046f 100644 --- a/libswresample/swresample.c +++ b/libswresample/swresample.c @@ -97,6 +97,8 @@ static const AVOption options[]={ , OFFSET(soft_compensation_duration),AV_OPT_TYPE_FLOAT ,{.dbl=1 }, 0 , INT_MAX , PARAM }, {"max_soft_comp" , "set maximum factor by which data is stretched/squeezed to make it match the timestamps." , OFFSET(max_soft_compensation),AV_OPT_TYPE_FLOAT ,{.dbl=0 }, INT_MIN, INT_MAX , PARAM }, +{"async" , "simplified 1 parameter audio timestamp matching, 0(disabled), 1(filling and trimming), >1(maximum stretch/squeeze in samples per second)" + , OFFSET(async) , AV_OPT_TYPE_FLOAT ,{.dbl=0 }, INT_MIN, INT_MAX , PARAM }, { "matrix_encoding" , "set matrixed stereo encoding" , OFFSET(matrix_encoding), AV_OPT_TYPE_INT ,{.i64 = AV_MATRIX_ENCODING_NONE}, AV_MATRIX_ENCODING_NONE, AV_MATRIX_ENCODING_NB-1, PARAM, "matrix_encoding" }, { "none", "select none", 0, AV_OPT_TYPE_CONST, { .i64 = AV_MATRIX_ENCODING_NONE }, INT_MIN, INT_MAX, PARAM, "matrix_encoding" }, @@ -278,6 +280,14 @@ av_cold int swr_init(struct SwrContext *s){ set_audiodata_fmt(&s-> in, s-> in_sample_fmt); set_audiodata_fmt(&s->out, s->out_sample_fmt); + if (s->async) { + if (s->min_compensation >= FLT_MAX/2) + s->min_compensation = 0.001; + if (s->async > 1.0001) { + s->max_soft_compensation = s->async / (double) s->in_sample_rate; + } + } + if (s->out_sample_rate!=s->in_sample_rate || (s->flags & SWR_FLAG_RESAMPLE)){ s->resample = s->resampler->init(s->resample, s->out_sample_rate, s->in_sample_rate, s->filter_size, s->phase_shift, s->linear_interp, s->cutoff, s->int_sample_fmt, s->filter_type, s->kaiser_beta, s->precision, s->cheby); }else diff --git a/libswresample/swresample_internal.h b/libswresample/swresample_internal.h index 19ca0d0fa3..d471517d9e 100644 --- a/libswresample/swresample_internal.h +++ b/libswresample/swresample_internal.h @@ -84,6 +84,7 @@ struct SwrContext { float min_hard_compensation; ///< minimum below which no silence inject / sample drop will happen float soft_compensation_duration; ///< duration over which soft compensation is applied float max_soft_compensation; ///< maximum soft compensation in seconds over soft_compensation_duration + float async; ///< simple 1 parameter async, similar to ffmpegs -async int resample_first; ///< 1 if resampling must come first, 0 if rematrixing int rematrix; ///< flag to indicate if rematrixing is needed (basically if input and output layouts mismatch) -- cgit v1.2.3