[FFmpeg-cvslog] avcodec/mediacodecenc: set quality in cq mode

[Zhao Zhili]

ffmpeg | branch: master | Zhao Zhili <zhilizhao at tencent.com> | Sun Dec 17 20:50:53 2023 +0800| [287e22f745c0b7290ce1e80fc7cd161b41ca6997] | committer: Zhao Zhili

avcodec/mediacodecenc: set quality in cq mode

>From AOSP doc, these values are device and codec specific, but lower
values generally result in more efficient (smaller-sized) encoding.

For example, global_quality 50 on Pixel 6 results a 1080P 30 FPS
HEVC with 3744 kb/s, while global_quality 80 results 28178 kb/s.

Fix #10689

Signed-off-by: Zhao Zhili <zhilizhao at tencent.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=287e22f745c0b7290ce1e80fc7cd161b41ca6997
---

 libavcodec/mediacodecenc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libavcodec/mediacodecenc.c b/libavcodec/mediacodecenc.c
index a1ae5d5ec5..7eae542248 100644
--- a/libavcodec/mediacodecenc.c
+++ b/libavcodec/mediacodecenc.c
@@ -268,8 +268,11 @@ static av_cold int mediacodec_init(AVCodecContext *avctx)
 
     if (avctx->bit_rate)
         ff_AMediaFormat_setInt32(format, "bitrate", avctx->bit_rate);
-    if (s->bitrate_mode >= 0)
+    if (s->bitrate_mode >= 0) {
         ff_AMediaFormat_setInt32(format, "bitrate-mode", s->bitrate_mode);
+        if (s->bitrate_mode == BITRATE_MODE_CQ && avctx->global_quality > 0)
+            ff_AMediaFormat_setInt32(format, "quality", avctx->global_quality);
+    }
     // frame-rate and i-frame-interval are required to configure codec
     if (avctx->framerate.num >= avctx->framerate.den && avctx->framerate.den > 0) {
         s->fps = avctx->framerate.num / avctx->framerate.den;