[FFmpeg-devel] [PATCH v2] avcodec/videotoolbox: add rc_max_bitrate control into videotoolbox

[Richard Kern]

On March 14, 2017 at 10:54:47 AM, Steven Liu (lq at chinaffmpeg.org) wrote:

add kVTCompressionPropertyKey_DataRateLimits support by rc_max_bitrate

Reviewed-by: Rick Kern <kernrj at gmail.com>
Signed-off-by: Steven Liu <lq at chinaffmpeg.org>
---
libavcodec/videotoolboxenc.c | 47
++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 47 insertions(+)

diff --git a/libavcodec/videotoolboxenc.c b/libavcodec/videotoolboxenc.c
index 005f5d6..0cba2c8 100644
--- a/libavcodec/videotoolboxenc.c
+++ b/libavcodec/videotoolboxenc.c
@@ -898,7 +898,14 @@ static int vtenc_create_encoder(AVCodecContext *avctx,
{
VTEncContext *vtctx = avctx->priv_data;
SInt32 bit_rate = avctx->bit_rate;
+ SInt32 max_rate = avctx->rc_max_rate;
CFNumberRef bit_rate_num;
+ CFNumberRef bytes_per_second;
+ CFNumberRef one_second;
+ CFArrayRef data_rate_limits;
+ int64_t bytes_per_second_value = 0;
+ int64_t one_second_value = 0;
+ void *nums[2];

int status = VTCompressionSessionCreate(kCFAllocatorDefault,
avctx->width,
@@ -938,6 +945,46 @@ static int vtenc_create_encoder(AVCodecContext *avctx,
return AVERROR_EXTERNAL;
}

+ bytes_per_second_value = max_rate >> 3;
+ bytes_per_second = CFNumberCreate(kCFAllocatorDefault,
+ kCFNumberSInt64Type,
+ &bytes_per_second_value);
+ if (!bytes_per_second) {
+ return AVERROR(ENOMEM);
+ }
+ one_second_value = 1;
+ one_second = CFNumberCreate(kCFAllocatorDefault,
+ kCFNumberSInt64Type,
+ &one_second_value);
+ if (!one_second) {
+ CFRelease(bytes_per_second);
+ return AVERROR(ENOMEM);
+ }
+ nums[0] = bytes_per_second;
+ nums[1] = one_second;
+ data_rate_limits = CFArrayCreate(kCFAllocatorDefault,
+ nums,
+ 2,
+ &kCFTypeArrayCallBacks);
+
+ if (!data_rate_limits) {
+ CFRelease(bytes_per_second);
+ CFRelease(one_second);
+ return AVERROR(ENOMEM);
+ }
+ status = VTSessionSetProperty(vtctx->session,
+ kVTCompressionPropertyKey_DataRateLimits,
+ data_rate_limits);
+
+ CFRelease(bytes_per_second);
+ CFRelease(one_second);
+ CFRelease(data_rate_limits);
+
+ if (status) {
+ av_log(avctx, AV_LOG_ERROR, "Error setting max bitrate property: %d\n",
status);
+ return AVERROR_EXTERNAL;
+ }
+
if (profile_level) {
status = VTSessionSetProperty(vtctx->session,
kVTCompressionPropertyKey_ProfileLevel,
-- 
2.10.1.382.ga23ca1b.dirty


Pushed - thanks.






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