[FFmpeg-cvslog] libmp3lame: add ABR support
Timothy Gu
git at videolan.org
Mon Mar 31 02:55:42 CEST 2014
ffmpeg | branch: master | Timothy Gu <timothygu99 at gmail.com> | Fri Nov 1 19:43:24 2013 -0700| [09fda6bb503dd9ac6ca963e308bdb86114df1294] | committer: Vittorio Giovara
libmp3lame: add ABR support
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=09fda6bb503dd9ac6ca963e308bdb86114df1294
---
libavcodec/libmp3lame.c | 11 +++++++++--
libavcodec/version.h | 2 +-
2 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/libavcodec/libmp3lame.c b/libavcodec/libmp3lame.c
index fbb4032..eebc65c 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 },
};
diff --git a/libavcodec/version.h b/libavcodec/version.h
index faf85b3..99e4303 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -30,7 +30,7 @@
#define LIBAVCODEC_VERSION_MAJOR 55
#define LIBAVCODEC_VERSION_MINOR 41
-#define LIBAVCODEC_VERSION_MICRO 1
+#define LIBAVCODEC_VERSION_MICRO 2
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \
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