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libavcodec/qsvenc: Add bitrate reset support to qsvenc

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Signed-off-by: Wenbin Chen <wenbin.chen@intel.com>
This commit is contained in:
Wenbin Chen 2022-09-23 10:44:11 +08:00 committed by Haihao Xiang
parent 17df61083d
commit 29a3ba8693
3 changed files with 49 additions and 0 deletions
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6
doc/encoders.texi
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@ -3365,6 +3365,12 @@ Change this value to reset qsv codec's low_delay_brc configuration.
@item @var{framerate}
Change this value to reset qsv codec's framerate configuration.
@item @var{bit_rate}
@item @var{rc_buffer_size}
@item @var{rc_initial_buffer_occupancy}
@item @var{rc_max_rate}
Change these value to reset qsv codec's bitrate control configuration.
@end table
@subsection H264 options

38
libavcodec/qsvenc.c
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@ -718,6 +718,10 @@ static int init_video_param(AVCodecContext *avctx, QSVEncContext *q)
max_bitrate_kbps = avctx->rc_max_rate / 1000;
brc_param_multiplier = (FFMAX(FFMAX3(target_bitrate_kbps, max_bitrate_kbps, buffer_size_in_kilobytes),
initial_delay_in_kilobytes) + 0x10000) / 0x10000;
q->old_rc_buffer_size = avctx->rc_buffer_size;
q->old_rc_initial_buffer_occupancy = avctx->rc_initial_buffer_occupancy;
q->old_bit_rate = avctx->bit_rate;
q->old_rc_max_rate = avctx->rc_max_rate;
switch (q->param.mfx.RateControlMethod) {
case MFX_RATECONTROL_CBR:
@ -1863,6 +1867,39 @@ static int update_frame_rate(AVCodecContext *avctx, QSVEncContext *q)
return updated;
}
static int update_bitrate(AVCodecContext *avctx, QSVEncContext *q)
{
int updated = 0;
int target_bitrate_kbps, max_bitrate_kbps, brc_param_multiplier;
int buffer_size_in_kilobytes, initial_delay_in_kilobytes;
UPDATE_PARAM(q->old_rc_buffer_size, avctx->rc_buffer_size);
UPDATE_PARAM(q->old_rc_initial_buffer_occupancy, avctx->rc_initial_buffer_occupancy);
UPDATE_PARAM(q->old_bit_rate, avctx->bit_rate);
UPDATE_PARAM(q->old_rc_max_rate, avctx->rc_max_rate);
if (!updated)
return 0;
buffer_size_in_kilobytes = avctx->rc_buffer_size / 8000;
initial_delay_in_kilobytes = avctx->rc_initial_buffer_occupancy / 8000;
target_bitrate_kbps = avctx->bit_rate / 1000;
max_bitrate_kbps = avctx->rc_max_rate / 1000;
brc_param_multiplier = (FFMAX(FFMAX3(target_bitrate_kbps, max_bitrate_kbps, buffer_size_in_kilobytes),
initial_delay_in_kilobytes) + 0x10000) / 0x10000;
q->param.mfx.BufferSizeInKB = buffer_size_in_kilobytes / brc_param_multiplier;
q->param.mfx.InitialDelayInKB = initial_delay_in_kilobytes / brc_param_multiplier;
q->param.mfx.TargetKbps = target_bitrate_kbps / brc_param_multiplier;
q->param.mfx.MaxKbps = max_bitrate_kbps / brc_param_multiplier;
q->param.mfx.BRCParamMultiplier = brc_param_multiplier;
av_log(avctx, AV_LOG_VERBOSE,
"Reset BufferSizeInKB: %d; InitialDelayInKB: %d; "
"TargetKbps: %d; MaxKbps: %d; BRCParamMultiplier: %d\n",
q->param.mfx.BufferSizeInKB, q->param.mfx.InitialDelayInKB,
q->param.mfx.TargetKbps, q->param.mfx.MaxKbps, q->param.mfx.BRCParamMultiplier);
return updated;
}
static int update_parameters(AVCodecContext *avctx, QSVEncContext *q,
const AVFrame *frame)
{
@ -1877,6 +1914,7 @@ static int update_parameters(AVCodecContext *avctx, QSVEncContext *q,
needReset |= update_rir(avctx, q);
needReset |= update_low_delay_brc(avctx, q);
needReset |= update_frame_rate(avctx, q);
needReset |= update_bitrate(avctx, q);
ret = update_min_max_qp(avctx, q);
if (ret < 0)
return ret;

5
libavcodec/qsvenc.h
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@ -273,6 +273,11 @@ typedef struct QSVEncContext {
int old_low_delay_brc;
// This is used for framerate reset
AVRational old_framerate;
// These are used for bitrate control reset
int old_bit_rate;
int old_rc_buffer_size;
int old_rc_initial_buffer_occupancy;
int old_rc_max_rate;
} QSVEncContext;
int ff_qsv_enc_init(AVCodecContext *avctx, QSVEncContext *q);