Re: [FFmpeg-devel] [PATCH v8 06/15] avcodec/vaapi_encode: extract the init function to base layer

["Wu, Tong1" <tong1.wu-at-intel.com@ffmpeg.org>]

>-----Original Message-----
>From: ffmpeg-devel <ffmpeg-devel-bounces@ffmpeg.org> On Behalf Of Mark
>Thompson
>Sent: Wednesday, May 15, 2024 4:56 AM
>To: ffmpeg-devel@ffmpeg.org
>Subject: Re: [FFmpeg-devel] [PATCH v8 06/15] avcodec/vaapi_encode: extract
>the init function to base layer
>
>On 18/04/2024 09:59, tong1.wu-at-intel.com@ffmpeg.org wrote:
>> From: Tong Wu <tong1.wu@intel.com>
>>
>> Related parameters are also moved to base layer.
>>
>> Signed-off-by: Tong Wu <tong1.wu@intel.com>
>> ---
>>  libavcodec/hw_base_encode.c     | 33 ++++++++++++++++
>>  libavcodec/hw_base_encode.h     | 11 ++++++
>>  libavcodec/vaapi_encode.c       | 68 ++++++++++-----------------------
>>  libavcodec/vaapi_encode.h       |  6 ---
>>  libavcodec/vaapi_encode_av1.c   |  2 +-
>>  libavcodec/vaapi_encode_h264.c  |  2 +-
>>  libavcodec/vaapi_encode_h265.c  |  2 +-
>>  libavcodec/vaapi_encode_mjpeg.c |  6 ++-
>>  8 files changed, 72 insertions(+), 58 deletions(-)
>>
>> diff --git a/libavcodec/hw_base_encode.c b/libavcodec/hw_base_encode.c
>> index 1d9a255f69..14f3ecfc94 100644
>> --- a/libavcodec/hw_base_encode.c
>> +++ b/libavcodec/hw_base_encode.c
>> @@ -598,3 +598,36 @@ end:
>>
>>      return 0;
>>  }
>> +
>> +int ff_hw_base_encode_init(AVCodecContext *avctx)
>> +{
>> +    HWBaseEncodeContext *ctx = avctx->priv_data;
>> +
>> +    ctx->frame = av_frame_alloc();
>> +    if (!ctx->frame)
>> +        return AVERROR(ENOMEM);
>> +
>> +    if (!avctx->hw_frames_ctx) {
>> +        av_log(avctx, AV_LOG_ERROR, "A hardware frames reference is "
>> +               "required to associate the encoding device.\n");
>> +        return AVERROR(EINVAL);
>> +    }
>> +
>> +    ctx->input_frames_ref = av_buffer_ref(avctx->hw_frames_ctx);
>> +    if (!ctx->input_frames_ref)
>> +        return AVERROR(ENOMEM);
>> +
>> +    ctx->input_frames = (AVHWFramesContext *)ctx->input_frames_ref-
>>data;
>> +
>> +    ctx->device_ref = av_buffer_ref(ctx->input_frames->device_ref);
>> +    if (!ctx->device_ref)
>> +        return AVERROR(ENOMEM);
>> +
>> +    ctx->device = (AVHWDeviceContext *)ctx->device_ref->data;
>> +
>> +    ctx->tail_pkt = av_packet_alloc();
>> +    if (!ctx->tail_pkt)
>> +        return AVERROR(ENOMEM);
>> +
>> +    return 0;
>> +}
>> diff --git a/libavcodec/hw_base_encode.h b/libavcodec/hw_base_encode.h
>> index b5b676b9a8..f7e385e840 100644
>> --- a/libavcodec/hw_base_encode.h
>> +++ b/libavcodec/hw_base_encode.h
>> @@ -19,6 +19,7 @@
>>  #ifndef AVCODEC_HW_BASE_ENCODE_H
>>  #define AVCODEC_HW_BASE_ENCODE_H
>>
>> +#include "libavutil/hwcontext.h"
>>  #include "libavutil/fifo.h"
>>
>>  #define MAX_DPB_SIZE 16
>> @@ -117,6 +118,14 @@ typedef struct HWBaseEncodeContext {
>>      // Hardware-specific hooks.
>>      const struct HWEncodePictureOperation *op;
>>
>> +    // The hardware device context.
>> +    AVBufferRef    *device_ref;
>> +    AVHWDeviceContext *device;
>> +
>> +    // The hardware frame context containing the input frames.
>> +    AVBufferRef    *input_frames_ref;
>> +    AVHWFramesContext *input_frames;
>> +
>>      // Current encoding window, in display (input) order.
>>      HWBaseEncodePicture *pic_start, *pic_end;
>>      // The next picture to use as the previous reference picture in
>> @@ -183,6 +192,8 @@ typedef struct HWBaseEncodeContext {
>>
>>  int ff_hw_base_encode_receive_packet(AVCodecContext *avctx, AVPacket
>*pkt);
>>
>> +int ff_hw_base_encode_init(AVCodecContext *avctx);
>> +
>>  #define HW_BASE_ENCODE_COMMON_OPTIONS \
>>      { "async_depth", "Maximum processing parallelism. " \
>>        "Increase this to improve single channel performance.", \
>
>Maybe this patch should be merged with 9/15 to keep the init/close symmetry?
>It's not clear that the intermediate makes sense, and it has some churn.
>

Will do it.

-Tong
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