From 09fda6bb503dd9ac6ca963e308bdb86114df1294 Mon Sep 17 00:00:00 2001 From: Timothy Gu Date: Fri, 1 Nov 2013 19:43:24 -0700 Subject: libmp3lame: add ABR support --- libavcodec/libmp3lame.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) (limited to 'libavcodec/libmp3lame.c') diff --git a/libavcodec/libmp3lame.c b/libavcodec/libmp3lame.c index fbb40321b9..eebc65c44d 100644 --- a/libavcodec/libmp3lame.c +++ b/libavcodec/libmp3lame.c @@ -49,6 +49,7 @@ typedef struct LAMEContext { int buffer_size; int reservoir; int joint_stereo; + int abr; float *samples_flt[2]; AudioFrameQueue afq; AVFloatDSPContext fdsp; @@ -114,8 +115,13 @@ static av_cold int mp3lame_encode_init(AVCodecContext *avctx) lame_set_VBR(s->gfp, vbr_default); lame_set_VBR_quality(s->gfp, avctx->global_quality / (float)FF_QP2LAMBDA); } else { - if (avctx->bit_rate) // CBR - lame_set_brate(s->gfp, avctx->bit_rate / 1000); + if (avctx->bit_rate) { + if (s->abr) { // ABR + lame_set_VBR(s->gfp, vbr_abr); + lame_set_VBR_mean_bitrate_kbps(s->gfp, avctx->bit_rate / 1000); + } else // CBR + lame_set_brate(s->gfp, avctx->bit_rate / 1000); + } } /* do not get a Xing VBR header frame from LAME */ @@ -262,6 +268,7 @@ static int mp3lame_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, static const AVOption options[] = { { "reservoir", "Use bit reservoir.", OFFSET(reservoir), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, AE }, { "joint_stereo", "Use joint stereo.", OFFSET(joint_stereo), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, AE }, + { "abr", "Use ABR", OFFSET(abr), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AE }, { NULL }, }; -- cgit v1.2.3