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Code Issues Releases Activity

avcodec/nvenc: refcount input frame mappings

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If some logic like vsync in ffmpeg.c duplicates frames, it might pass
the same frame twice, which will result in a crash due it being
effectively mapped and unmapped twice.

Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>
This commit is contained in:
Timo Rothenpieler 2018-01-26 20:16:53 +01:00
parent f85b102c80
commit 802ebfae3b
2 changed files with 24 additions and 17 deletions
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33
libavcodec/nvenc.c
View File

@ -1281,12 +1281,9 @@ av_cold int ff_nvenc_encode_close(AVCodecContext *avctx)
av_fifo_freep(&ctx->output_surface_queue);
if (ctx->surfaces && avctx->pix_fmt == AV_PIX_FMT_CUDA) {
for (i = 0; i < ctx->nb_surfaces; ++i) {
if (ctx->surfaces[i].input_surface) {
p_nvenc->nvEncUnmapInputResource(ctx->nvencoder, ctx->surfaces[i].in_map.mappedResource);
}
}
for (i = 0; i < ctx->nb_registered_frames; i++) {
if (ctx->registered_frames[i].mapped)
p_nvenc->nvEncUnmapInputResource(ctx->nvencoder, ctx->registered_frames[i].in_map.mappedResource);
if (ctx->registered_frames[i].regptr)
p_nvenc->nvEncUnregisterResource(ctx->nvencoder, ctx->registered_frames[i].regptr);
}
@ -1503,19 +1500,23 @@ static int nvenc_upload_frame(AVCodecContext *avctx, const AVFrame *frame,
if (res < 0)
return res;
nvenc_frame->in_map.version = NV_ENC_MAP_INPUT_RESOURCE_VER;
nvenc_frame->in_map.registeredResource = ctx->registered_frames[reg_idx].regptr;
nv_status = p_nvenc->nvEncMapInputResource(ctx->nvencoder, &nvenc_frame->in_map);
if (!ctx->registered_frames[reg_idx].mapped) {
ctx->registered_frames[reg_idx].in_map.version = NV_ENC_MAP_INPUT_RESOURCE_VER;
ctx->registered_frames[reg_idx].in_map.registeredResource = ctx->registered_frames[reg_idx].regptr;
nv_status = p_nvenc->nvEncMapInputResource(ctx->nvencoder, &ctx->registered_frames[reg_idx].in_map);
if (nv_status != NV_ENC_SUCCESS) {
av_frame_unref(nvenc_frame->in_ref);
return nvenc_print_error(avctx, nv_status, "Error mapping an input resource");
}
}
ctx->registered_frames[reg_idx].mapped += 1;
ctx->registered_frames[reg_idx].mapped = 1;
nvenc_frame->reg_idx = reg_idx;
nvenc_frame->input_surface = nvenc_frame->in_map.mappedResource;
nvenc_frame->format = nvenc_frame->in_map.mappedBufferFmt;
nvenc_frame->input_surface = ctx->registered_frames[reg_idx].in_map.mappedResource;
nvenc_frame->format = ctx->registered_frames[reg_idx].in_map.mappedBufferFmt;
nvenc_frame->pitch = frame->linesize[0];
return 0;
} else {
NV_ENC_LOCK_INPUT_BUFFER lockBufferParams = { 0 };
@ -1665,9 +1666,15 @@ static int process_output_surface(AVCodecContext *avctx, AVPacket *pkt, NvencSur
if (avctx->pix_fmt == AV_PIX_FMT_CUDA) {
p_nvenc->nvEncUnmapInputResource(ctx->nvencoder, tmpoutsurf->in_map.mappedResource);
ctx->registered_frames[tmpoutsurf->reg_idx].mapped -= 1;
if (ctx->registered_frames[tmpoutsurf->reg_idx].mapped == 0) {
p_nvenc->nvEncUnmapInputResource(ctx->nvencoder, ctx->registered_frames[tmpoutsurf->reg_idx].in_map.mappedResource);
} else if (ctx->registered_frames[tmpoutsurf->reg_idx].mapped < 0) {
res = AVERROR_BUG;
goto error;
}
av_frame_unref(tmpoutsurf->in_ref);
ctx->registered_frames[tmpoutsurf->reg_idx].mapped = 0;
tmpoutsurf->input_surface = NULL;
}

2
libavcodec/nvenc.h
View File

@ -35,7 +35,6 @@ typedef struct NvencSurface
{
NV_ENC_INPUT_PTR input_surface;
AVFrame *in_ref;
NV_ENC_MAP_INPUT_RESOURCE in_map;
int reg_idx;
int width;
int height;
@ -118,6 +117,7 @@ typedef struct NvencContext
CUdeviceptr ptr;
NV_ENC_REGISTERED_PTR regptr;
int mapped;
NV_ENC_MAP_INPUT_RESOURCE in_map;
} registered_frames[MAX_REGISTERED_FRAMES];
int nb_registered_frames;