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h264dec: add a NVDEC hwaccel 

Some parts of the code are based on a patch by
Timo Rothenpieler <timo@rothenpieler.org>

Merges Libav commit b9129ec466.

Due to the name clash with our cuvid decoder, rename it to nvdec.

This commit also changes the Libav code to dynamic loading of the
cuda/cuvid libraries.

Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>
tags/n4.0
Anton Khirnov Timo Rothenpieler 8 years ago
parent
0aecc08e5f
commit
0e00624389
11 changed files with 691 additions and 3 deletions
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  1. +1
    -0
      Changelog
  2. +8
    -2
      configure
  3. +1
    -0
      fftools/ffmpeg.h
  4. +4
    -0
      fftools/ffmpeg_opt.c
  5. +2
    -0
      libavcodec/Makefile
  6. +1
    -0
      libavcodec/allcodecs.c
  7. +4
    -0
      libavcodec/h264_slice.c
  8. +431
    -0
      libavcodec/nvdec.c
  9. +62
    -0
      libavcodec/nvdec.h
  10. +176
    -0
      libavcodec/nvdec_h264.c
  11. +1
    -1
      libavcodec/version.h

+ 1
- 0
Changelog View File

@@ -13,6 +13,7 @@ version <next>:
- PCE support for extended channel layouts in the AAC encoder
- native aptX encoder and decoder
- Raw aptX muxer and demuxer
- NVIDIA NVDEC-accelerated H.264 hwaccel decoding


version 3.4:


+ 8
- 2
configure View File

@@ -313,6 +313,7 @@ External library support:
--enable-libmfx enable Intel MediaSDK (AKA Quick Sync Video) code via libmfx [no]
--enable-libnpp enable Nvidia Performance Primitives-based code [no]
--enable-mmal enable Broadcom Multi-Media Abstraction Layer (Raspberry Pi) via MMAL [no]
--disable-nvdec disable Nvidia video decoding acceleration (via hwaccel) [autodetect]
--disable-nvenc disable Nvidia video encoding code [autodetect]
--enable-omx enable OpenMAX IL code [no]
--enable-omx-rpi enable OpenMAX IL code for Raspberry Pi [no]
@@ -1647,6 +1648,7 @@ HWACCEL_AUTODETECT_LIBRARY_LIST="
cuvid
d3d11va
dxva2
nvdec
nvenc
vaapi
vdpau
@@ -2672,6 +2674,8 @@ h264_dxva2_hwaccel_deps="dxva2"
h264_dxva2_hwaccel_select="h264_decoder"
h264_mediacodec_hwaccel_deps="mediacodec"
h264_mmal_hwaccel_deps="mmal"
h264_nvdec_hwaccel_deps="cuda nvdec"
h264_nvdec_hwaccel_select="h264_decoder"
h264_qsv_hwaccel_deps="libmfx"
h264_vaapi_hwaccel_deps="vaapi"
h264_vaapi_hwaccel_select="h264_decoder"
@@ -5940,6 +5944,8 @@ done
enabled cuda_sdk && require cuda_sdk cuda.h cuCtxCreate -lcuda
enabled cuvid && { enabled cuda ||
die "ERROR: CUVID requires CUDA"; }
enabled nvdec && { enabled cuda ||
die "ERROR: NVDEC hwaccel requires CUDA"; }
enabled chromaprint && require chromaprint chromaprint.h chromaprint_get_version -lchromaprint
enabled decklink && { require_header DeckLinkAPI.h &&
{ check_cpp_condition DeckLinkAPIVersion.h "BLACKMAGIC_DECKLINK_API_VERSION >= 0x0a060100" || die "ERROR: Decklink API version must be >= 10.6.1."; } }
@@ -6295,11 +6301,11 @@ if enabled x86; then
mingw32*|mingw64*|win32|win64|linux|cygwin*)
;;
*)
disable cuda cuvid nvenc
disable cuda cuvid nvdec nvenc
;;
esac
else
disable cuda cuvid nvenc
disable cuda cuvid nvdec nvenc
fi

enabled nvenc &&


+ 1
- 0
fftools/ffmpeg.h View File

@@ -68,6 +68,7 @@ enum HWAccelID {
HWACCEL_VAAPI,
HWACCEL_CUVID,
HWACCEL_D3D11VA,
HWACCEL_NVDEC,
};

typedef struct HWAccel {


+ 4
- 0
fftools/ffmpeg_opt.c View File

@@ -90,6 +90,10 @@ const HWAccel hwaccels[] = {
{ "vaapi", hwaccel_decode_init, HWACCEL_VAAPI, AV_PIX_FMT_VAAPI,
AV_HWDEVICE_TYPE_VAAPI },
#endif
#if CONFIG_NVDEC
{ "nvdec", hwaccel_decode_init, HWACCEL_NVDEC, AV_PIX_FMT_CUDA,
AV_HWDEVICE_TYPE_CUDA },
#endif
#if CONFIG_CUVID
{ "cuvid", cuvid_init, HWACCEL_CUVID, AV_PIX_FMT_CUDA,
AV_HWDEVICE_TYPE_NONE },


+ 2
- 0
libavcodec/Makefile View File

@@ -830,6 +830,7 @@ OBJS-$(CONFIG_ADPCM_YAMAHA_ENCODER) += adpcmenc.o adpcm_data.o
# hardware accelerators
OBJS-$(CONFIG_D3D11VA) += dxva2.o
OBJS-$(CONFIG_DXVA2) += dxva2.o
OBJS-$(CONFIG_NVDEC) += nvdec.o
OBJS-$(CONFIG_VAAPI) += vaapi_decode.o
OBJS-$(CONFIG_VIDEOTOOLBOX) += videotoolbox.o
OBJS-$(CONFIG_VDPAU) += vdpau.o
@@ -838,6 +839,7 @@ OBJS-$(CONFIG_H263_VAAPI_HWACCEL) += vaapi_mpeg4.o
OBJS-$(CONFIG_H263_VIDEOTOOLBOX_HWACCEL) += videotoolbox.o
OBJS-$(CONFIG_H264_D3D11VA_HWACCEL) += dxva2_h264.o
OBJS-$(CONFIG_H264_DXVA2_HWACCEL) += dxva2_h264.o
OBJS-$(CONFIG_H264_NVDEC_HWACCEL) += nvdec_h264.o
OBJS-$(CONFIG_H264_QSV_HWACCEL) += qsvdec_h2645.o
OBJS-$(CONFIG_H264_VAAPI_HWACCEL) += vaapi_h264.o
OBJS-$(CONFIG_H264_VDPAU_HWACCEL) += vdpau_h264.o


+ 1
- 0
libavcodec/allcodecs.c View File

@@ -70,6 +70,7 @@ static void register_all(void)
REGISTER_HWACCEL(H264_DXVA2, h264_dxva2);
REGISTER_HWACCEL(H264_MEDIACODEC, h264_mediacodec);
REGISTER_HWACCEL(H264_MMAL, h264_mmal);
REGISTER_HWACCEL(H264_NVDEC, h264_nvdec);
REGISTER_HWACCEL(H264_QSV, h264_qsv);
REGISTER_HWACCEL(H264_VAAPI, h264_vaapi);
REGISTER_HWACCEL(H264_VDPAU, h264_vdpau);


+ 4
- 0
libavcodec/h264_slice.c View File

@@ -757,6 +757,7 @@ static enum AVPixelFormat get_pixel_format(H264Context *h, int force_callback)
{
#define HWACCEL_MAX (CONFIG_H264_DXVA2_HWACCEL + \
(CONFIG_H264_D3D11VA_HWACCEL * 2) + \
CONFIG_H264_NVDEC_HWACCEL + \
CONFIG_H264_VAAPI_HWACCEL + \
CONFIG_H264_VIDEOTOOLBOX_HWACCEL + \
CONFIG_H264_VDPAU_HWACCEL)
@@ -812,6 +813,9 @@ static enum AVPixelFormat get_pixel_format(H264Context *h, int force_callback)
case 8:
#if CONFIG_H264_VDPAU_HWACCEL
*fmt++ = AV_PIX_FMT_VDPAU;
#endif
#if CONFIG_H264_NVDEC_HWACCEL
*fmt++ = AV_PIX_FMT_CUDA;
#endif
if (CHROMA444(h)) {
if (h->avctx->colorspace == AVCOL_SPC_RGB)


+ 431
- 0
libavcodec/nvdec.c View File

@@ -0,0 +1,431 @@
/*
* HW decode acceleration through NVDEC
*
* Copyright (c) 2016 Anton Khirnov
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

#include "config.h"

#include "libavutil/common.h"
#include "libavutil/error.h"
#include "libavutil/hwcontext.h"
#include "libavutil/hwcontext_cuda_internal.h"
#include "libavutil/pixdesc.h"
#include "libavutil/pixfmt.h"

#include "avcodec.h"
#include "decode.h"
#include "nvdec.h"
#include "internal.h"

typedef struct NVDECDecoder {
CUvideodecoder decoder;

AVBufferRef *hw_device_ref;
CUcontext cuda_ctx;

CudaFunctions *cudl;
CuvidFunctions *cvdl;
} NVDECDecoder;

typedef struct NVDECFramePool {
unsigned int dpb_size;
unsigned int nb_allocated;
} NVDECFramePool;

static int map_avcodec_id(enum AVCodecID id)
{
switch (id) {
case AV_CODEC_ID_H264: return cudaVideoCodec_H264;
}
return -1;
}

static int map_chroma_format(enum AVPixelFormat pix_fmt)
{
int shift_h = 0, shift_v = 0;

av_pix_fmt_get_chroma_sub_sample(pix_fmt, &shift_h, &shift_v);

if (shift_h == 1 && shift_v == 1)
return cudaVideoChromaFormat_420;
else if (shift_h == 1 && shift_v == 0)
return cudaVideoChromaFormat_422;
else if (shift_h == 0 && shift_v == 0)
return cudaVideoChromaFormat_444;

return -1;
}

static void nvdec_decoder_free(void *opaque, uint8_t *data)
{
NVDECDecoder *decoder = (NVDECDecoder*)data;

if (decoder->decoder)
decoder->cvdl->cuvidDestroyDecoder(decoder->decoder);

av_buffer_unref(&decoder->hw_device_ref);

cuvid_free_functions(&decoder->cvdl);

av_freep(&decoder);
}

static int nvdec_decoder_create(AVBufferRef **out, AVBufferRef *hw_device_ref,
CUVIDDECODECREATEINFO *params, void *logctx)
{
AVHWDeviceContext *hw_device_ctx = (AVHWDeviceContext*)hw_device_ref->data;
AVCUDADeviceContext *device_hwctx = hw_device_ctx->hwctx;

AVBufferRef *decoder_ref;
NVDECDecoder *decoder;

CUcontext dummy;
CUresult err;
int ret;

decoder = av_mallocz(sizeof(*decoder));
if (!decoder)
return AVERROR(ENOMEM);

decoder_ref = av_buffer_create((uint8_t*)decoder, sizeof(*decoder),
nvdec_decoder_free, NULL, AV_BUFFER_FLAG_READONLY);
if (!decoder_ref) {
av_freep(&decoder);
return AVERROR(ENOMEM);
}

decoder->hw_device_ref = av_buffer_ref(hw_device_ref);
if (!decoder->hw_device_ref) {
ret = AVERROR(ENOMEM);
goto fail;
}
decoder->cuda_ctx = device_hwctx->cuda_ctx;
decoder->cudl = device_hwctx->internal->cuda_dl;

ret = cuvid_load_functions(&decoder->cvdl);
if (ret < 0) {
av_log(logctx, AV_LOG_ERROR, "Failed loading nvcuvid.\n");
goto fail;
}

err = decoder->cudl->cuCtxPushCurrent(decoder->cuda_ctx);
if (err != CUDA_SUCCESS) {
ret = AVERROR_UNKNOWN;
goto fail;
}

err = decoder->cvdl->cuvidCreateDecoder(&decoder->decoder, params);

decoder->cudl->cuCtxPopCurrent(&dummy);

if (err != CUDA_SUCCESS) {
av_log(logctx, AV_LOG_ERROR, "Error creating a NVDEC decoder: %d\n", err);
ret = AVERROR_UNKNOWN;
goto fail;
}

*out = decoder_ref;

return 0;
fail:
av_buffer_unref(&decoder_ref);
return ret;
}

static AVBufferRef *nvdec_decoder_frame_alloc(void *opaque, int size)
{
NVDECFramePool *pool = opaque;
AVBufferRef *ret;

if (pool->nb_allocated >= pool->dpb_size)
return NULL;

ret = av_buffer_alloc(sizeof(unsigned int));
if (!ret)
return NULL;

*(unsigned int*)ret->data = pool->nb_allocated++;

return ret;
}

int ff_nvdec_decode_uninit(AVCodecContext *avctx)
{
NVDECContext *ctx = avctx->internal->hwaccel_priv_data;

av_freep(&ctx->bitstream);
ctx->bitstream_len = 0;
ctx->bitstream_allocated = 0;

av_freep(&ctx->slice_offsets);
ctx->nb_slices = 0;
ctx->slice_offsets_allocated = 0;

av_buffer_unref(&ctx->decoder_ref);
av_buffer_pool_uninit(&ctx->decoder_pool);

return 0;
}

int ff_nvdec_decode_init(AVCodecContext *avctx, unsigned int dpb_size)
{
NVDECContext *ctx = avctx->internal->hwaccel_priv_data;

NVDECFramePool *pool;
AVHWFramesContext *frames_ctx;
const AVPixFmtDescriptor *sw_desc;

CUVIDDECODECREATEINFO params = { 0 };

int cuvid_codec_type, cuvid_chroma_format;
int ret = 0;

sw_desc = av_pix_fmt_desc_get(avctx->sw_pix_fmt);
if (!sw_desc)
return AVERROR_BUG;

cuvid_codec_type = map_avcodec_id(avctx->codec_id);
if (cuvid_codec_type < 0) {
av_log(avctx, AV_LOG_ERROR, "Unsupported codec ID\n");
return AVERROR_BUG;
}

cuvid_chroma_format = map_chroma_format(avctx->sw_pix_fmt);
if (cuvid_chroma_format < 0) {
av_log(avctx, AV_LOG_ERROR, "Unsupported chroma format\n");
return AVERROR(ENOSYS);
}

if (avctx->thread_type & FF_THREAD_FRAME)
dpb_size += avctx->thread_count;

if (!avctx->hw_frames_ctx) {
AVHWFramesContext *frames_ctx;

if (!avctx->hw_device_ctx) {
av_log(avctx, AV_LOG_ERROR, "A hardware device or frames context "
"is required for CUVID decoding.\n");
return AVERROR(EINVAL);
}

avctx->hw_frames_ctx = av_hwframe_ctx_alloc(avctx->hw_device_ctx);
if (!avctx->hw_frames_ctx)
return AVERROR(ENOMEM);
frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data;

frames_ctx->format = AV_PIX_FMT_CUDA;
frames_ctx->width = avctx->coded_width;
frames_ctx->height = avctx->coded_height;
frames_ctx->sw_format = AV_PIX_FMT_NV12;
frames_ctx->sw_format = sw_desc->comp[0].depth > 8 ?
AV_PIX_FMT_P010 : AV_PIX_FMT_NV12;
frames_ctx->initial_pool_size = dpb_size;

ret = av_hwframe_ctx_init(avctx->hw_frames_ctx);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Error initializing internal frames context\n");
return ret;
}
}
frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data;

params.ulWidth = avctx->coded_width;
params.ulHeight = avctx->coded_height;
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.CodecType = cuvid_codec_type;
params.ChromaFormat = cuvid_chroma_format;
params.ulNumDecodeSurfaces = dpb_size;
params.ulNumOutputSurfaces = 1;

ret = nvdec_decoder_create(&ctx->decoder_ref, frames_ctx->device_ref, &params, avctx);
if (ret < 0)
return ret;

pool = av_mallocz(sizeof(*pool));
if (!pool) {
ret = AVERROR(ENOMEM);
goto fail;
}
pool->dpb_size = dpb_size;

ctx->decoder_pool = av_buffer_pool_init2(sizeof(int), pool,
nvdec_decoder_frame_alloc, av_free);
if (!ctx->decoder_pool) {
ret = AVERROR(ENOMEM);
goto fail;
}

return 0;
fail:
ff_nvdec_decode_uninit(avctx);
return ret;
}

static void nvdec_fdd_priv_free(void *priv)
{
NVDECFrame *cf = priv;

if (!cf)
return;

av_buffer_unref(&cf->idx_ref);
av_buffer_unref(&cf->decoder_ref);

av_freep(&priv);
}

static int nvdec_retrieve_data(void *logctx, AVFrame *frame)
{
FrameDecodeData *fdd = (FrameDecodeData*)frame->private_ref->data;
NVDECFrame *cf = (NVDECFrame*)fdd->hwaccel_priv;
NVDECDecoder *decoder = (NVDECDecoder*)cf->decoder_ref->data;

CUVIDPROCPARAMS vpp = { .progressive_frame = 1 };

CUresult err;
CUcontext dummy;
CUdeviceptr devptr;

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

err = decoder->cudl->cuCtxPushCurrent(decoder->cuda_ctx);
if (err != CUDA_SUCCESS)
return AVERROR_UNKNOWN;

err = decoder->cvdl->cuvidMapVideoFrame(decoder->decoder, cf->idx, &devptr,
&pitch, &vpp);
if (err != CUDA_SUCCESS) {
av_log(logctx, AV_LOG_ERROR, "Error mapping a picture with CUVID: %d\n",
err);
ret = AVERROR_UNKNOWN;
goto finish;
}

for (i = 0; frame->data[i]; i++) {
CUDA_MEMCPY2D cpy = {
.srcMemoryType = CU_MEMORYTYPE_DEVICE,
.dstMemoryType = CU_MEMORYTYPE_DEVICE,
.srcDevice = devptr,
.dstDevice = (CUdeviceptr)frame->data[i],
.srcPitch = pitch,
.dstPitch = frame->linesize[i],
.srcY = offset,
.WidthInBytes = FFMIN(pitch, frame->linesize[i]),
.Height = frame->height >> (i ? 1 : 0),
};

err = decoder->cudl->cuMemcpy2D(&cpy);
if (err != CUDA_SUCCESS) {
av_log(logctx, AV_LOG_ERROR, "Error copying decoded frame: %d\n",
err);
ret = AVERROR_UNKNOWN;
goto copy_fail;
}

offset += cpy.Height;
}

copy_fail:
decoder->cvdl->cuvidUnmapVideoFrame(decoder->decoder, devptr);

finish:
decoder->cudl->cuCtxPopCurrent(&dummy);
return ret;
}

int ff_nvdec_start_frame(AVCodecContext *avctx, AVFrame *frame)
{
NVDECContext *ctx = avctx->internal->hwaccel_priv_data;
FrameDecodeData *fdd = (FrameDecodeData*)frame->private_ref->data;
NVDECFrame *cf = NULL;
int ret;

ctx->bitstream_len = 0;
ctx->nb_slices = 0;

if (fdd->hwaccel_priv)
return 0;

cf = av_mallocz(sizeof(*cf));
if (!cf)
return AVERROR(ENOMEM);

cf->decoder_ref = av_buffer_ref(ctx->decoder_ref);
if (!cf->decoder_ref)
goto fail;

cf->idx_ref = av_buffer_pool_get(ctx->decoder_pool);
if (!cf->idx_ref) {
av_log(avctx, AV_LOG_ERROR, "No decoder surfaces left\n");
ret = AVERROR(ENOMEM);
goto fail;
}
cf->idx = *(unsigned int*)cf->idx_ref->data;

fdd->hwaccel_priv = cf;
fdd->hwaccel_priv_free = nvdec_fdd_priv_free;
fdd->post_process = nvdec_retrieve_data;

return 0;
fail:
nvdec_fdd_priv_free(cf);
return ret;

}

int ff_nvdec_end_frame(AVCodecContext *avctx)
{
NVDECContext *ctx = avctx->internal->hwaccel_priv_data;
NVDECDecoder *decoder = (NVDECDecoder*)ctx->decoder_ref->data;
CUVIDPICPARAMS *pp = &ctx->pic_params;

CUresult err;
CUcontext dummy;

int ret = 0;

pp->nBitstreamDataLen = ctx->bitstream_len;
pp->pBitstreamData = ctx->bitstream;
pp->nNumSlices = ctx->nb_slices;
pp->pSliceDataOffsets = ctx->slice_offsets;

err = decoder->cudl->cuCtxPushCurrent(decoder->cuda_ctx);
if (err != CUDA_SUCCESS)
return AVERROR_UNKNOWN;

err = decoder->cvdl->cuvidDecodePicture(decoder->decoder, &ctx->pic_params);
if (err != CUDA_SUCCESS) {
av_log(avctx, AV_LOG_ERROR, "Error decoding a picture with NVDEC: %d\n",
err);
ret = AVERROR_UNKNOWN;
goto finish;
}

finish:
decoder->cudl->cuCtxPopCurrent(&dummy);

return ret;
}

+ 62
- 0
libavcodec/nvdec.h View File

@@ -0,0 +1,62 @@
/*
* HW decode acceleration through NVDEC
*
* Copyright (c) 2016 Anton Khirnov
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

#ifndef AVCODEC_NVDEC_H
#define AVCODEC_NVDEC_H

#include "compat/cuda/dynlink_loader.h"

#include <stdint.h>

#include "libavutil/buffer.h"
#include "libavutil/frame.h"

#include "avcodec.h"

typedef struct NVDECFrame {
unsigned int idx;
AVBufferRef *idx_ref;
AVBufferRef *decoder_ref;
} NVDECFrame;

typedef struct NVDECContext {
CUVIDPICPARAMS pic_params;

AVBufferPool *decoder_pool;

AVBufferRef *decoder_ref;

uint8_t *bitstream;
int bitstream_len;
unsigned int bitstream_allocated;

unsigned *slice_offsets;
int nb_slices;
unsigned int slice_offsets_allocated;
} NVDECContext;

int ff_nvdec_decode_init(AVCodecContext *avctx, unsigned int dpb_size);
int ff_nvdec_decode_uninit(AVCodecContext *avctx);
int ff_nvdec_start_frame(AVCodecContext *avctx, AVFrame *frame);
int ff_nvdec_end_frame(AVCodecContext *avctx);

#endif /* AVCODEC_NVDEC_H */

+ 176
- 0
libavcodec/nvdec_h264.c View File

@@ -0,0 +1,176 @@
/*
* MPEG-4 Part 10 / AVC / H.264 HW decode acceleration through NVDEC
*
* Copyright (c) 2016 Anton Khirnov
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

#include <stdint.h>
#include <string.h>

#include "avcodec.h"
#include "nvdec.h"
#include "decode.h"
#include "internal.h"
#include "h264dec.h"

static void dpb_add(const H264Context *h, CUVIDH264DPBENTRY *dst, const H264Picture *src,
int frame_idx)
{
FrameDecodeData *fdd = (FrameDecodeData*)src->f->private_ref->data;
const NVDECFrame *cf = fdd->hwaccel_priv;

dst->PicIdx = cf ? cf->idx : -1;
dst->FrameIdx = frame_idx;
dst->is_long_term = src->long_ref;
dst->not_existing = 0;
dst->used_for_reference = src->reference & 3;
dst->FieldOrderCnt[0] = src->field_poc[0];
dst->FieldOrderCnt[1] = src->field_poc[1];
}

static int nvdec_h264_start_frame(AVCodecContext *avctx,
const uint8_t *buffer, uint32_t size)
{
const H264Context *h = avctx->priv_data;
const PPS *pps = h->ps.pps;
const SPS *sps = h->ps.sps;

NVDECContext *ctx = avctx->internal->hwaccel_priv_data;
CUVIDPICPARAMS *pp = &ctx->pic_params;
CUVIDH264PICPARAMS *ppc = &pp->CodecSpecific.h264;
FrameDecodeData *fdd;
NVDECFrame *cf;

int i, dpb_size, ret;

ret = ff_nvdec_start_frame(avctx, h->cur_pic_ptr->f);
if (ret < 0)
return ret;

fdd = (FrameDecodeData*)h->cur_pic_ptr->f->private_ref->data;
cf = (NVDECFrame*)fdd->hwaccel_priv;

*pp = (CUVIDPICPARAMS) {
.PicWidthInMbs = h->mb_width,
.FrameHeightInMbs = h->mb_height,
.CurrPicIdx = cf->idx,
.field_pic_flag = FIELD_PICTURE(h),
.bottom_field_flag = h->picture_structure == PICT_BOTTOM_FIELD,
.second_field = FIELD_PICTURE(h) && !h->first_field,
.ref_pic_flag = h->nal_ref_idc != 0,
.intra_pic_flag = 0,

.CodecSpecific.h264 = {
.log2_max_frame_num_minus4 = sps->log2_max_frame_num - 4,
.pic_order_cnt_type = sps->poc_type,
.log2_max_pic_order_cnt_lsb_minus4 = FFMAX(sps->log2_max_poc_lsb - 4, 0),
.delta_pic_order_always_zero_flag = sps->delta_pic_order_always_zero_flag,
.frame_mbs_only_flag = sps->frame_mbs_only_flag,
.direct_8x8_inference_flag = sps->direct_8x8_inference_flag,
.num_ref_frames = sps->ref_frame_count,
.residual_colour_transform_flag = sps->residual_color_transform_flag,
.bit_depth_luma_minus8 = sps->bit_depth_luma - 8,
.bit_depth_chroma_minus8 = sps->bit_depth_chroma - 8,
.qpprime_y_zero_transform_bypass_flag = sps->transform_bypass,

.entropy_coding_mode_flag = pps->cabac,
.pic_order_present_flag = pps->pic_order_present,
.num_ref_idx_l0_active_minus1 = pps->ref_count[0] - 1,
.num_ref_idx_l1_active_minus1 = pps->ref_count[1] - 1,
.weighted_pred_flag = pps->weighted_pred,
.weighted_bipred_idc = pps->weighted_bipred_idc,
.pic_init_qp_minus26 = pps->init_qp - 26,
.deblocking_filter_control_present_flag = pps->deblocking_filter_parameters_present,
.redundant_pic_cnt_present_flag = pps->redundant_pic_cnt_present,
.transform_8x8_mode_flag = pps->transform_8x8_mode,
.MbaffFrameFlag = sps->mb_aff && !FIELD_PICTURE(h),
.constrained_intra_pred_flag = pps->constrained_intra_pred,
.chroma_qp_index_offset = pps->chroma_qp_index_offset[0],
.second_chroma_qp_index_offset = pps->chroma_qp_index_offset[1],
.ref_pic_flag = h->nal_ref_idc != 0,
.frame_num = h->poc.frame_num,
.CurrFieldOrderCnt[0] = h->cur_pic_ptr->field_poc[0],
.CurrFieldOrderCnt[1] = h->cur_pic_ptr->field_poc[1],
},
};

memcpy(ppc->WeightScale4x4, pps->scaling_matrix4, sizeof(ppc->WeightScale4x4));
memcpy(ppc->WeightScale8x8[0], pps->scaling_matrix8[0], sizeof(ppc->WeightScale8x8[0]));
memcpy(ppc->WeightScale8x8[1], pps->scaling_matrix8[3], sizeof(ppc->WeightScale8x8[0]));

dpb_size = 0;
for (i = 0; i < h->short_ref_count; i++)
dpb_add(h, &ppc->dpb[dpb_size++], h->short_ref[i], h->short_ref[i]->frame_num);
for (i = 0; i < 16; i++) {
if (h->long_ref[i])
dpb_add(h, &ppc->dpb[dpb_size++], h->long_ref[i], i);
}

for (i = dpb_size; i < FF_ARRAY_ELEMS(ppc->dpb); i++)
ppc->dpb[i].PicIdx = -1;

return 0;
}

static int nvdec_h264_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
uint32_t size)
{
NVDECContext *ctx = avctx->internal->hwaccel_priv_data;
void *tmp;

tmp = av_fast_realloc(ctx->bitstream, &ctx->bitstream_allocated,
ctx->bitstream_len + size + 3);
if (!tmp)
return AVERROR(ENOMEM);
ctx->bitstream = tmp;

tmp = av_fast_realloc(ctx->slice_offsets, &ctx->slice_offsets_allocated,
(ctx->nb_slices + 1) * sizeof(*ctx->slice_offsets));
if (!tmp)
return AVERROR(ENOMEM);
ctx->slice_offsets = tmp;

AV_WB24(ctx->bitstream + ctx->bitstream_len, 1);
memcpy(ctx->bitstream + ctx->bitstream_len + 3, buffer, size);
ctx->slice_offsets[ctx->nb_slices] = ctx->bitstream_len ;
ctx->bitstream_len += size + 3;
ctx->nb_slices++;

return 0;
}

static int nvdec_h264_decode_init(AVCodecContext *avctx)
{
const H264Context *h = avctx->priv_data;
const SPS *sps = h->ps.sps;
return ff_nvdec_decode_init(avctx, sps->ref_frame_count + sps->num_reorder_frames);
}

AVHWAccel ff_h264_nvdec_hwaccel = {
.name = "h264_nvdec",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H264,
.pix_fmt = AV_PIX_FMT_CUDA,
.start_frame = nvdec_h264_start_frame,
.end_frame = ff_nvdec_end_frame,
.decode_slice = nvdec_h264_decode_slice,
.init = nvdec_h264_decode_init,
.uninit = ff_nvdec_decode_uninit,
.priv_data_size = sizeof(NVDECContext),
};

+ 1
- 1
libavcodec/version.h View File

@@ -28,7 +28,7 @@
#include "libavutil/version.h"

#define LIBAVCODEC_VERSION_MAJOR 58
#define LIBAVCODEC_VERSION_MINOR 1
#define LIBAVCODEC_VERSION_MINOR 2
#define LIBAVCODEC_VERSION_MICRO 100

#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \


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