From: xufuji456 <839789740@qq.com>
To: ffmpeg-devel@ffmpeg.org
Cc: xufuji456 <839789740@qq.com>
Subject: [FFmpeg-devel] [PATCH] avcodec/mediacodecdec: add low-latency decoding
Date: Mon, 22 May 2023 17:56:31 +0800
Message-ID: <tencent_3E66CFE6752F7B088D66C3C4B4339E80FB0A@qq.com> (raw)
The low-latency decoding mode has available in Android api 30.
It will keep less buffer internally, and output frame as fast as possible.
See https://developer.android.google.cn/reference/android/media/MediaCodec?hl=en#PARAMETER_KEY_LOW_LATENCY
Signed-off-by: xufuji456 <839789740@qq.com>
---
libavcodec/mediacodecdec.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavcodec/mediacodecdec.c b/libavcodec/mediacodecdec.c
index 21464900d1..5fece6ee5b 100644
--- a/libavcodec/mediacodecdec.c
+++ b/libavcodec/mediacodecdec.c
@@ -394,6 +394,10 @@ static av_cold int mediacodec_decode_init(AVCodecContext *avctx)
ff_AMediaFormat_setString(format, "mime", codec_mime);
ff_AMediaFormat_setInt32(format, "width", avctx->width);
ff_AMediaFormat_setInt32(format, "height", avctx->height);
+ // low-latency mode: available in Android api 30
+ if (avctx->flags & AV_CODEC_FLAG_LOW_DELAY) {
+ ff_AMediaFormat_setInt32(format, "low-latency", 1);
+ }
s->ctx = av_mallocz(sizeof(*s->ctx));
if (!s->ctx) {
--
2.32.0 (Apple Git-132)
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