diff options
Diffstat (limited to 'libavcodec/nvdec.c')
-rw-r--r-- | libavcodec/nvdec.c | 584 |
1 files changed, 584 insertions, 0 deletions
diff --git a/libavcodec/nvdec.c b/libavcodec/nvdec.c new file mode 100644 index 0000000..ab3cb88 --- /dev/null +++ b/libavcodec/nvdec.c @@ -0,0 +1,584 @@ +/* + * HW decode acceleration through NVDEC + * + * Copyright (c) 2016 Anton Khirnov + * + * This file is part of FFmpeg. + * + * FFmpeg 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. + * + * FFmpeg 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 FFmpeg; 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; + case AV_CODEC_ID_HEVC: return cudaVideoCodec_HEVC; + case AV_CODEC_ID_MJPEG: return cudaVideoCodec_JPEG; + case AV_CODEC_ID_MPEG1VIDEO: return cudaVideoCodec_MPEG1; + case AV_CODEC_ID_MPEG2VIDEO: return cudaVideoCodec_MPEG2; + case AV_CODEC_ID_MPEG4: return cudaVideoCodec_MPEG4; + case AV_CODEC_ID_VC1: return cudaVideoCodec_VC1; + case AV_CODEC_ID_VP8: return cudaVideoCodec_VP8; + case AV_CODEC_ID_VP9: return cudaVideoCodec_VP9; + case AV_CODEC_ID_WMV3: return cudaVideoCodec_VC1; + } + 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 int nvdec_test_capabilities(NVDECDecoder *decoder, + CUVIDDECODECREATEINFO *params, void *logctx) +{ + CUresult err; + CUVIDDECODECAPS caps = { 0 }; + + caps.eCodecType = params->CodecType; + caps.eChromaFormat = params->ChromaFormat; + caps.nBitDepthMinus8 = params->bitDepthMinus8; + + if (!decoder->cvdl->cuvidGetDecoderCaps) { + av_log(logctx, AV_LOG_WARNING, "Used Nvidia driver is too old to perform a capability check.\n"); + av_log(logctx, AV_LOG_WARNING, "The minimum required version is " +#if defined(_WIN32) || defined(__CYGWIN__) + "378.66" +#else + "378.13" +#endif + ". Continuing blind.\n"); + return 0; + } + + err = decoder->cvdl->cuvidGetDecoderCaps(&caps); + if (err != CUDA_SUCCESS) { + av_log(logctx, AV_LOG_ERROR, "Failed querying decoder capabilities\n"); + return AVERROR_UNKNOWN; + } + + av_log(logctx, AV_LOG_VERBOSE, "NVDEC capabilities:\n"); + av_log(logctx, AV_LOG_VERBOSE, "format supported: %s, max_mb_count: %d\n", + caps.bIsSupported ? "yes" : "no", caps.nMaxMBCount); + av_log(logctx, AV_LOG_VERBOSE, "min_width: %d, max_width: %d\n", + caps.nMinWidth, caps.nMaxWidth); + av_log(logctx, AV_LOG_VERBOSE, "min_height: %d, max_height: %d\n", + caps.nMinHeight, caps.nMaxHeight); + + if (!caps.bIsSupported) { + av_log(logctx, AV_LOG_ERROR, "Hardware is lacking required capabilities\n"); + return AVERROR(EINVAL); + } + + if (params->ulWidth > caps.nMaxWidth || params->ulWidth < caps.nMinWidth) { + av_log(logctx, AV_LOG_ERROR, "Video width %d not within range from %d to %d\n", + (int)params->ulWidth, caps.nMinWidth, caps.nMaxWidth); + return AVERROR(EINVAL); + } + + if (params->ulHeight > caps.nMaxHeight || params->ulHeight < caps.nMinHeight) { + av_log(logctx, AV_LOG_ERROR, "Video height %d not within range from %d to %d\n", + (int)params->ulHeight, caps.nMinHeight, caps.nMaxHeight); + return AVERROR(EINVAL); + } + + if ((params->ulWidth * params->ulHeight) / 256 > caps.nMaxMBCount) { + av_log(logctx, AV_LOG_ERROR, "Video macroblock count %d exceeds maximum of %d\n", + (int)(params->ulWidth * params->ulHeight) / 256, caps.nMaxMBCount); + return AVERROR(EINVAL); + } + + return 0; +} + +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, logctx); + 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; + } + + ret = nvdec_test_capabilities(decoder, params, logctx); + if (ret < 0) { + decoder->cudl->cuCtxPopCurrent(&dummy); + 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) +{ + 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->hw_frames_ctx) { + ret = ff_decode_get_hw_frames_ctx(avctx, AV_HWDEVICE_TYPE_CUDA); + if (ret < 0) + 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 = frames_ctx->initial_pool_size; + params.ulNumOutputSurfaces = 1; + + ret = nvdec_decoder_create(&ctx->decoder_ref, frames_ctx->device_ref, ¶ms, avctx); + if (ret < 0) { + if (params.ulNumDecodeSurfaces > 32) { + av_log(avctx, AV_LOG_WARNING, "Using more than 32 (%d) decode surfaces might cause nvdec to fail.\n", + (int)params.ulNumDecodeSurfaces); + av_log(avctx, AV_LOG_WARNING, "Try lowering the amount of threads. Using %d right now.\n", + avctx->thread_count); + } + return ret; + } + + pool = av_mallocz(sizeof(*pool)); + if (!pool) { + ret = AVERROR(ENOMEM); + goto fail; + } + pool->dpb_size = frames_ctx->initial_pool_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) { + ret = AVERROR(ENOMEM); + 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; +} + +int ff_nvdec_simple_end_frame(AVCodecContext *avctx) +{ + NVDECContext *ctx = avctx->internal->hwaccel_priv_data; + int ret = ff_nvdec_end_frame(avctx); + ctx->bitstream = NULL; + return ret; +} + +int ff_nvdec_simple_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->slice_offsets, &ctx->slice_offsets_allocated, + (ctx->nb_slices + 1) * sizeof(*ctx->slice_offsets)); + if (!tmp) + return AVERROR(ENOMEM); + ctx->slice_offsets = tmp; + + if (!ctx->bitstream) + ctx->bitstream = (uint8_t*)buffer; + + ctx->slice_offsets[ctx->nb_slices] = buffer - ctx->bitstream; + ctx->bitstream_len += size; + ctx->nb_slices++; + + return 0; +} + +int ff_nvdec_frame_params(AVCodecContext *avctx, + AVBufferRef *hw_frames_ctx, + int dpb_size) +{ + AVHWFramesContext *frames_ctx = (AVHWFramesContext*)hw_frames_ctx->data; + const AVPixFmtDescriptor *sw_desc; + int cuvid_codec_type, cuvid_chroma_format; + + 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_VERBOSE, "Unsupported chroma format\n"); + return AVERROR(EINVAL); + } + + frames_ctx->format = AV_PIX_FMT_CUDA; + frames_ctx->width = (avctx->coded_width + 1) & ~1; + frames_ctx->height = (avctx->coded_height + 1) & ~1; + frames_ctx->initial_pool_size = dpb_size; + + switch (sw_desc->comp[0].depth) { + case 8: + frames_ctx->sw_format = AV_PIX_FMT_NV12; + break; + case 10: + frames_ctx->sw_format = AV_PIX_FMT_P010; + break; + case 12: + frames_ctx->sw_format = AV_PIX_FMT_P016; + break; + default: + return AVERROR(EINVAL); + } + + return 0; +} + +int ff_nvdec_get_ref_idx(AVFrame *frame) +{ + FrameDecodeData *fdd; + NVDECFrame *cf; + + if (!frame || !frame->private_ref) + return -1; + + fdd = (FrameDecodeData*)frame->private_ref->data; + cf = (NVDECFrame*)fdd->hwaccel_priv; + if (!cf) + return -1; + + return cf->idx; +} |