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avcodec/nvdec: Add support for decoding HEVC 4:4:4 content 

The latest generation video decoder on the Turing chips supports
decoding HEVC 4:4:4. Supporting this is relatively straight-forward;
we need to account for the different chroma format and pick the
right output and sw formats at the right times.

There was one bug which was the hard-coded assumption that the
first chroma plane would be half-height; I fixed this to use the
actual shift value on the plane.

We also need to pass the SPS and PPS range extension flags.
tags/n4.2
Philip Langdale 7 years ago
parent
f4ea930a11
commit
e06ccfbe1d
3 changed files with 67 additions and 8 deletions
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  1. +3
    -0
      libavcodec/hevcdec.c
  2. +34
    -8
      libavcodec/nvdec.c
  3. +30
    -0
      libavcodec/nvdec_hevc.c

+ 3
- 0
libavcodec/hevcdec.c View File

@@ -409,6 +409,9 @@ static enum AVPixelFormat get_format(HEVCContext *s, const HEVCSPS *sps)
#endif
break;
case AV_PIX_FMT_YUV420P12:
case AV_PIX_FMT_YUV444P:
case AV_PIX_FMT_YUV444P10:
case AV_PIX_FMT_YUV444P12:
#if CONFIG_HEVC_NVDEC_HWACCEL
*fmt++ = AV_PIX_FMT_CUDA;
#endif


+ 34
- 8
libavcodec/nvdec.c View File

@@ -35,6 +35,11 @@
#include "nvdec.h"
#include "internal.h"

#if !NVDECAPI_CHECK_VERSION(9, 0)
#define cudaVideoSurfaceFormat_YUV444 2
#define cudaVideoSurfaceFormat_YUV444_16Bit 3
#endif

typedef struct NVDECDecoder {
CUvideodecoder decoder;

@@ -274,7 +279,8 @@ int ff_nvdec_decode_init(AVCodecContext *avctx)

CUVIDDECODECREATEINFO params = { 0 };

int cuvid_codec_type, cuvid_chroma_format;
cudaVideoSurfaceFormat output_format;
int cuvid_codec_type, cuvid_chroma_format, chroma_444;
int ret = 0;

sw_desc = av_pix_fmt_desc_get(avctx->sw_pix_fmt);
@@ -292,6 +298,7 @@ int ff_nvdec_decode_init(AVCodecContext *avctx)
av_log(avctx, AV_LOG_ERROR, "Unsupported chroma format\n");
return AVERROR(ENOSYS);
}
chroma_444 = cuvid_chroma_format == cudaVideoChromaFormat_444;

if (!avctx->hw_frames_ctx) {
ret = ff_decode_get_hw_frames_ctx(avctx, AV_HWDEVICE_TYPE_CUDA);
@@ -299,6 +306,21 @@ int ff_nvdec_decode_init(AVCodecContext *avctx)
return ret;
}

switch (sw_desc->comp[0].depth) {
case 8:
output_format = chroma_444 ? cudaVideoSurfaceFormat_YUV444 :
cudaVideoSurfaceFormat_NV12;
break;
case 10:
case 12:
output_format = chroma_444 ? cudaVideoSurfaceFormat_YUV444_16Bit :
cudaVideoSurfaceFormat_P016;
break;
default:
av_log(avctx, AV_LOG_ERROR, "Unsupported bit depth\n");
return AVERROR(ENOSYS);
}

frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data;

params.ulWidth = avctx->coded_width;
@@ -306,8 +328,7 @@ int ff_nvdec_decode_init(AVCodecContext *avctx)
params.ulTargetWidth = avctx->coded_width;
params.ulTargetHeight = avctx->coded_height;
params.bitDepthMinus8 = sw_desc->comp[0].depth - 8;
params.OutputFormat = params.bitDepthMinus8 ?
cudaVideoSurfaceFormat_P016 : cudaVideoSurfaceFormat_NV12;
params.OutputFormat = output_format;
params.CodecType = cuvid_codec_type;
params.ChromaFormat = cuvid_chroma_format;
params.ulNumDecodeSurfaces = frames_ctx->initial_pool_size;
@@ -386,6 +407,8 @@ static int nvdec_retrieve_data(void *logctx, AVFrame *frame)
NVDECFrame *cf = (NVDECFrame*)fdd->hwaccel_priv;
NVDECDecoder *decoder = (NVDECDecoder*)cf->decoder_ref->data;

AVHWFramesContext *hwctx = (AVHWFramesContext *)frame->hw_frames_ctx->data;

CUVIDPROCPARAMS vpp = { 0 };
NVDECFrame *unmap_data = NULL;

@@ -394,6 +417,7 @@ static int nvdec_retrieve_data(void *logctx, AVFrame *frame)

unsigned int pitch, i;
unsigned int offset = 0;
int shift_h = 0, shift_v = 0;
int ret = 0;

vpp.progressive_frame = 1;
@@ -427,10 +451,11 @@ static int nvdec_retrieve_data(void *logctx, AVFrame *frame)
unmap_data->idx_ref = av_buffer_ref(cf->idx_ref);
unmap_data->decoder_ref = av_buffer_ref(cf->decoder_ref);

av_pix_fmt_get_chroma_sub_sample(hwctx->sw_format, &shift_h, &shift_v);
for (i = 0; frame->linesize[i]; i++) {
frame->data[i] = (uint8_t*)(devptr + offset);
frame->linesize[i] = pitch;
offset += pitch * (frame->height >> (i ? 1 : 0));
offset += pitch * (frame->height >> (i ? shift_v : 0));
}

goto finish;
@@ -566,7 +591,7 @@ int ff_nvdec_frame_params(AVCodecContext *avctx,
{
AVHWFramesContext *frames_ctx = (AVHWFramesContext*)hw_frames_ctx->data;
const AVPixFmtDescriptor *sw_desc;
int cuvid_codec_type, cuvid_chroma_format;
int cuvid_codec_type, cuvid_chroma_format, chroma_444;

sw_desc = av_pix_fmt_desc_get(avctx->sw_pix_fmt);
if (!sw_desc)
@@ -583,6 +608,7 @@ int ff_nvdec_frame_params(AVCodecContext *avctx,
av_log(avctx, AV_LOG_VERBOSE, "Unsupported chroma format\n");
return AVERROR(EINVAL);
}
chroma_444 = cuvid_chroma_format == cudaVideoChromaFormat_444;

frames_ctx->format = AV_PIX_FMT_CUDA;
frames_ctx->width = (avctx->coded_width + 1) & ~1;
@@ -601,13 +627,13 @@ int ff_nvdec_frame_params(AVCodecContext *avctx,

switch (sw_desc->comp[0].depth) {
case 8:
frames_ctx->sw_format = AV_PIX_FMT_NV12;
frames_ctx->sw_format = chroma_444 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_NV12;
break;
case 10:
frames_ctx->sw_format = AV_PIX_FMT_P010;
frames_ctx->sw_format = chroma_444 ? AV_PIX_FMT_YUV444P16 : AV_PIX_FMT_P010;
break;
case 12:
frames_ctx->sw_format = AV_PIX_FMT_P016;
frames_ctx->sw_format = chroma_444 ? AV_PIX_FMT_YUV444P16 : AV_PIX_FMT_P016;
break;
default:
return AVERROR(EINVAL);


+ 30
- 0
libavcodec/nvdec_hevc.c View File

@@ -131,6 +131,17 @@ static int nvdec_hevc_start_frame(AVCodecContext *avctx,
.IdrPicFlag = IS_IDR(s),
.bit_depth_luma_minus8 = sps->bit_depth - 8,
.bit_depth_chroma_minus8 = sps->bit_depth - 8,
#if NVDECAPI_CHECK_VERSION(9, 0)
.sps_range_extension_flag = sps->sps_range_extension_flag,
.transform_skip_rotation_enabled_flag = sps->transform_skip_rotation_enabled_flag,
.transform_skip_context_enabled_flag = sps->transform_skip_context_enabled_flag,
.implicit_rdpcm_enabled_flag = sps->implicit_rdpcm_enabled_flag,
.explicit_rdpcm_enabled_flag = sps->explicit_rdpcm_enabled_flag,
.extended_precision_processing_flag = sps->extended_precision_processing_flag,
.intra_smoothing_disabled_flag = sps->intra_smoothing_disabled_flag,
.persistent_rice_adaptation_enabled_flag = sps->persistent_rice_adaptation_enabled_flag,
.cabac_bypass_alignment_enabled_flag = sps->cabac_bypass_alignment_enabled_flag,
#endif

.dependent_slice_segments_enabled_flag = pps->dependent_slice_segments_enabled_flag,
.slice_segment_header_extension_present_flag = pps->slice_header_extension_present_flag,
@@ -164,6 +175,13 @@ static int nvdec_hevc_start_frame(AVCodecContext *avctx,
.uniform_spacing_flag = pps->uniform_spacing_flag,
.num_tile_columns_minus1 = pps->num_tile_columns - 1,
.num_tile_rows_minus1 = pps->num_tile_rows - 1,
#if NVDECAPI_CHECK_VERSION(9, 0)
.pps_range_extension_flag = pps->pps_range_extensions_flag,
.cross_component_prediction_enabled_flag = pps->cross_component_prediction_enabled_flag,
.chroma_qp_offset_list_enabled_flag = pps->chroma_qp_offset_list_enabled_flag,
.diff_cu_chroma_qp_offset_depth = pps->diff_cu_chroma_qp_offset_depth,
.chroma_qp_offset_list_len_minus1 = pps->chroma_qp_offset_list_len_minus1,
#endif

.NumBitsForShortTermRPSInSlice = s->sh.short_term_rps ? s->sh.short_term_ref_pic_set_size : 0,
.NumDeltaPocsOfRefRpsIdx = s->sh.short_term_rps ? s->sh.short_term_rps->rps_idx_num_delta_pocs : 0,
@@ -185,6 +203,18 @@ static int nvdec_hevc_start_frame(AVCodecContext *avctx,
for (i = 0; i < pps->num_tile_rows; i++)
ppc->row_height_minus1[i] = pps->row_height[i] - 1;

#if NVDECAPI_CHECK_VERSION(9, 0)
if (pps->chroma_qp_offset_list_len_minus1 > FF_ARRAY_ELEMS(ppc->cb_qp_offset_list) ||
pps->chroma_qp_offset_list_len_minus1 > FF_ARRAY_ELEMS(ppc->cr_qp_offset_list)) {
av_log(avctx, AV_LOG_ERROR, "Too many chroma_qp_offsets\n");
return AVERROR(ENOSYS);
}
for (i = 0; i <= pps->chroma_qp_offset_list_len_minus1; i++) {
ppc->cb_qp_offset_list[i] = pps->cb_qp_offset_list[i];
ppc->cr_qp_offset_list[i] = pps->cr_qp_offset_list[i];
}
#endif

if (s->rps[LT_CURR].nb_refs > FF_ARRAY_ELEMS(ppc->RefPicSetLtCurr) ||
s->rps[ST_CURR_BEF].nb_refs > FF_ARRAY_ELEMS(ppc->RefPicSetStCurrBefore) ||
s->rps[ST_CURR_AFT].nb_refs > FF_ARRAY_ELEMS(ppc->RefPicSetStCurrAfter)) {


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