[FFmpeg-devel] [PATCH 2/5] lavc/qsvdec: Replace current parser with MFXVideoDECODE_DecodeHeader()
Rogozhkin, Dmitry V
dmitry.v.rogozhkin at intel.com
Thu Jan 24 23:43:13 EET 2019
On Mon, 2019-01-21 at 20:41 +0800, Zhong Li wrote:
> Using MSDK parser can improve qsv decoder pass rate in some cases
> (E.g:
> sps declares a wrong level_idc, smaller than it should be).
> And it is necessary for adding new qsv decoders such as MJPEG and VP9
> since current parser can't provide enough information.
> Actually using MFXVideoDECODE_DecodeHeader() was disscussed at
> https://ffmpeg.org/pipermail/ffmpeg-devel/2015-July/175734.html and
> merged as commit 1acb19d,
> but was overwritten when merged libav patches (commit: 1f26a23)
> without any explain.
>
> Signed-off-by: Zhong Li <zhong.li at intel.com>
> ---
> libavcodec/qsvdec.c | 103 ++++++++++++++++------------------------
> ------------
> libavcodec/qsvdec.h | 2 +
> 2 files changed, 33 insertions(+), 72 deletions(-)
>
> diff --git a/libavcodec/qsvdec.c b/libavcodec/qsvdec.c
> index 4a0be81..013400b 100644
> --- a/libavcodec/qsvdec.c
> +++ b/libavcodec/qsvdec.c
> @@ -120,7 +120,7 @@ static inline unsigned int qsv_fifo_size(const
> AVFifoBuffer* fifo)
> return av_fifo_size(fifo) / qsv_fifo_item_size();
> }
>
> -static int qsv_decode_init(AVCodecContext *avctx, QSVContext *q)
> +static int qsv_decode_init(AVCodecContext *avctx, QSVContext *q,
> AVPacket *avpkt)
> {
> const AVPixFmtDescriptor *desc;
> mfxSession session = NULL;
> @@ -129,6 +129,17 @@ static int qsv_decode_init(AVCodecContext
> *avctx, QSVContext *q)
> int frame_width = avctx->coded_width;
> int frame_height = avctx->coded_height;
> int ret;
> + mfxBitstream bs = { { { 0 } } };
> +
> + if (avpkt->size) {
> + bs.Data = avpkt->data;
> + bs.DataLength = avpkt->size;
> + bs.MaxLength = bs.DataLength;
> + bs.TimeStamp = avpkt->pts;
> + if (avctx->field_order == AV_FIELD_PROGRESSIVE)
> + bs.DataFlag |= MFX_BITSTREAM_COMPLETE_FRAME;
+ } else
> + return AVERROR_INVALIDDATA;
>
> desc = av_pix_fmt_desc_get(avctx->sw_pix_fmt);
> if (!desc)
> @@ -174,32 +185,19 @@ static int qsv_decode_init(AVCodecContext
> *avctx, QSVContext *q)
> if (ret < 0)
> return ret;
>
> - param.mfx.CodecId = ret;
> - param.mfx.CodecProfile = ff_qsv_profile_to_mfx(avctx->codec_id,
> avctx->profile);
> - param.mfx.CodecLevel = avctx->level == FF_LEVEL_UNKNOWN ?
> MFX_LEVEL_UNKNOWN : avctx->level;
> -
> - param.mfx.FrameInfo.BitDepthLuma = desc->comp[0].depth;
> - param.mfx.FrameInfo.BitDepthChroma = desc->comp[0].depth;
> - param.mfx.FrameInfo.Shift = desc->comp[0].depth > 8;
> - param.mfx.FrameInfo.FourCC = q->fourcc;
> - param.mfx.FrameInfo.Width = frame_width;
> - param.mfx.FrameInfo.Height = frame_height;
> - param.mfx.FrameInfo.ChromaFormat = MFX_CHROMAFORMAT_YUV420;
> -
> - switch (avctx->field_order) {
> - case AV_FIELD_PROGRESSIVE:
> - param.mfx.FrameInfo.PicStruct = MFX_PICSTRUCT_PROGRESSIVE;
> - break;
> - case AV_FIELD_TT:
> - param.mfx.FrameInfo.PicStruct = MFX_PICSTRUCT_FIELD_TFF;
> - break;
> - case AV_FIELD_BB:
> - param.mfx.FrameInfo.PicStruct = MFX_PICSTRUCT_FIELD_BFF;
> - break;
> - default:
> - param.mfx.FrameInfo.PicStruct = MFX_PICSTRUCT_UNKNOWN;
> - break;
> - }
> + param.mfx.CodecId = ret;
> + ret = MFXVideoDECODE_DecodeHeader(q->session, &bs, ¶m);
This function may potentially return MFX_ERR_MORE_DATA if provided
bitstream don't contain full header. I am not sure whether ffmpeg will
guarantee that... And the decoding error reported by Artie suggests
that something is wrong around this. That can be ffmpeg or mediasdk
issue - need to check what was the data which ffmpeg really passed to
DecodeHeader.
> + if (ret < 0)
> + return ff_qsv_print_error(avctx, ret,
> + "Error decoding stream header");
> +
> + avctx->width = param.mfx.FrameInfo.CropW;
> + avctx->height = param.mfx.FrameInfo.CropH;
> + avctx->coded_width = param.mfx.FrameInfo.Width;
> + avctx->coded_height = param.mfx.FrameInfo.Height;
> + avctx->level = param.mfx.CodecProfile;
> + avctx->profile = param.mfx.CodecLevel;
Typo here. You assign profile to level and level to profile.
> + avctx->field_order =
> ff_qsv_map_picstruct(param.mfx.FrameInfo.PicStruct);
>
> param.IOPattern = q->iopattern;
> param.AsyncDepth = q->async_depth;
> @@ -521,62 +519,22 @@ int ff_qsv_process_data(AVCodecContext *avctx,
> QSVContext *q,
> pkt->data, pkt->size, pkt->pts, pkt->dts,
> pkt->pos);
>
> - avctx->field_order = q->parser->field_order;
> /* TODO: flush delayed frames on reinit */
> - if (q->parser->format != q->orig_pix_fmt ||
> - FFALIGN(q->parser->coded_width, 16) != FFALIGN(avctx-
> >coded_width, 16) ||
> - FFALIGN(q->parser->coded_height, 16) != FFALIGN(avctx-
> >coded_height, 16)) {
> +
> + if (!q->initialized){
> enum AVPixelFormat pix_fmts[3] = { AV_PIX_FMT_QSV,
> - AV_PIX_FMT_NONE,
> + AV_PIX_FMT_NV12,
> AV_PIX_FMT_NONE };
> - enum AVPixelFormat qsv_format;
> - AVPacket zero_pkt = {0};
> -
> - if (q->buffered_count) {
> - q->reinit_flag = 1;
> - /* decode zero-size pkt to flush the buffered pkt before
> reinit */
> - q->buffered_count--;
> - return qsv_decode(avctx, q, frame, got_frame,
> &zero_pkt);
> - }
> -
> - q->reinit_flag = 0;
> -
> - qsv_format = ff_qsv_map_pixfmt(q->parser->format, &q-
> >fourcc);
> - if (qsv_format < 0) {
> - av_log(avctx, AV_LOG_ERROR,
> - "Decoding pixel format '%s' is not supported\n",
> - av_get_pix_fmt_name(q->parser->format));
> - ret = AVERROR(ENOSYS);
> - goto reinit_fail;
> - }
> -
> - q->orig_pix_fmt = q->parser->format;
> - avctx->pix_fmt = pix_fmts[1] = qsv_format;
> - avctx->width = q->parser->width;
> - avctx->height = q->parser->height;
> - avctx->coded_width = FFALIGN(q->parser->coded_width, 16);
> - avctx->coded_height = FFALIGN(q->parser->coded_height, 16);
> - avctx->level = q->avctx_internal->level;
> - avctx->profile = q->avctx_internal->profile;
> -
> ret = ff_get_format(avctx, pix_fmts);
> if (ret < 0)
> goto reinit_fail;
>
> avctx->pix_fmt = ret;
>
> - desc = av_pix_fmt_desc_get(avctx->pix_fmt);
> - if (!desc)
> - goto reinit_fail;
> -
> - if (desc->comp[0].depth > 8) {
> - avctx->coded_width = FFALIGN(q->parser->coded_width,
> 32);
> - avctx->coded_height = FFALIGN(q->parser->coded_height,
> 32);
> - }
> -
> - ret = qsv_decode_init(avctx, q);
> + ret = qsv_decode_init(avctx, q, pkt);
> if (ret < 0)
> goto reinit_fail;
> + q->initialized = 1;
> }
>
> return qsv_decode(avctx, q, frame, got_frame, pkt);
> @@ -589,4 +547,5 @@ reinit_fail:
> void ff_qsv_decode_flush(AVCodecContext *avctx, QSVContext *q)
> {
> q->orig_pix_fmt = AV_PIX_FMT_NONE;
> + q->initialized = 0;
> }
> diff --git a/libavcodec/qsvdec.h b/libavcodec/qsvdec.h
> index 111536c..4812fb2 100644
> --- a/libavcodec/qsvdec.h
> +++ b/libavcodec/qsvdec.h
> @@ -63,6 +63,8 @@ typedef struct QSVContext {
> uint32_t fourcc;
> mfxFrameInfo frame_info;
>
> + int initialized;
> +
> // options set by the caller
> int async_depth;
> int iopattern;
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