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avcodec/nvdec: Use RefStruct API for decoder_ref

Browse Source 
Avoids allocations and error checks as well as the boilerplate
code for creating an AVBuffer with a custom free callback.
Also increases type safety.

Reviewed-by: Anton Khirnov <anton@khirnov.net>
Tested-by: Timo Rothenpieler <timo@rothenpieler.org>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2023-09-13 21:32:28 +02:00
parent 2ec62b1ca6
commit c7fb4d0eb6
2 changed files with 21 additions and 33 deletions
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50
libavcodec/nvdec.c
View File

@ -35,6 +35,7 @@
#include "decode.h"
#include "nvdec.h"
#include "internal.h"
#include "refstruct.h"
#if !NVDECAPI_CHECK_VERSION(9, 0)
#define cudaVideoSurfaceFormat_YUV444 2
@ -161,9 +162,9 @@ static int nvdec_test_capabilities(NVDECDecoder *decoder,
return 0;
}
static void nvdec_decoder_free(void *opaque, uint8_t *data)
static void nvdec_decoder_free(FFRefStructOpaque unused, void *obj)
{
NVDECDecoder *decoder = (NVDECDecoder*)data;
NVDECDecoder *decoder = obj;
if (decoder->decoder) {
void *logctx = decoder->hw_device_ref->data;
@ -177,33 +178,24 @@ static void nvdec_decoder_free(void *opaque, uint8_t *data)
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,
static int nvdec_decoder_create(NVDECDecoder **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;
int ret;
decoder = av_mallocz(sizeof(*decoder));
decoder = ff_refstruct_alloc_ext(sizeof(*decoder), 0,
NULL, nvdec_decoder_free);
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);
@ -237,11 +229,11 @@ static int nvdec_decoder_create(AVBufferRef **out, AVBufferRef *hw_device_ref,
goto fail;
}
*out = decoder_ref;
*out = decoder;
return 0;
fail:
av_buffer_unref(&decoder_ref);
ff_refstruct_unref(&decoder);
return ret;
}
@ -275,7 +267,7 @@ int ff_nvdec_decode_uninit(AVCodecContext *avctx)
ctx->nb_slices = 0;
ctx->slice_offsets_allocated = 0;
av_buffer_unref(&ctx->decoder_ref);
ff_refstruct_unref(&ctx->decoder);
av_buffer_pool_uninit(&ctx->decoder_pool);
return 0;
@ -408,7 +400,7 @@ int ff_nvdec_decode_init(AVCodecContext *avctx)
params.ulNumDecodeSurfaces = frames_ctx->initial_pool_size;
params.ulNumOutputSurfaces = unsafe_output ? frames_ctx->initial_pool_size : 1;
ret = nvdec_decoder_create(&ctx->decoder_ref, frames_ctx->device_ref, &params, avctx);
ret = nvdec_decoder_create(&ctx->decoder, frames_ctx->device_ref, &params, 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",
@ -420,7 +412,7 @@ int ff_nvdec_decode_init(AVCodecContext *avctx)
return ret;
}
decoder = (NVDECDecoder*)ctx->decoder_ref->data;
decoder = ctx->decoder;
decoder->unsafe_output = unsafe_output;
decoder->real_hw_frames_ref = real_hw_frames_ref;
real_hw_frames_ref = NULL;
@ -453,8 +445,8 @@ static void nvdec_fdd_priv_free(void *priv)
return;
av_buffer_unref(&cf->idx_ref);
av_buffer_unref(&cf->decoder_ref);
av_buffer_unref(&cf->ref_idx_ref);
ff_refstruct_unref(&cf->decoder);
av_freep(&priv);
}
@ -462,7 +454,7 @@ static void nvdec_fdd_priv_free(void *priv)
static void nvdec_unmap_mapped_frame(void *opaque, uint8_t *data)
{
NVDECFrame *unmap_data = (NVDECFrame*)data;
NVDECDecoder *decoder = (NVDECDecoder*)unmap_data->decoder_ref->data;
NVDECDecoder *decoder = unmap_data->decoder;
void *logctx = decoder->hw_device_ref->data;
CUdeviceptr devptr = (CUdeviceptr)opaque;
int ret;
@ -478,8 +470,8 @@ static void nvdec_unmap_mapped_frame(void *opaque, uint8_t *data)
finish:
av_buffer_unref(&unmap_data->idx_ref);
av_buffer_unref(&unmap_data->decoder_ref);
av_buffer_unref(&unmap_data->ref_idx_ref);
ff_refstruct_unref(&unmap_data->decoder);
av_free(unmap_data);
}
@ -487,7 +479,7 @@ 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;
NVDECDecoder *decoder = cf->decoder;
AVHWFramesContext *hwctx = (AVHWFramesContext *)frame->hw_frames_ctx->data;
@ -534,11 +526,11 @@ static int nvdec_retrieve_data(void *logctx, AVFrame *frame)
goto copy_fail;
unmap_data->idx = cf->idx;
if (!(unmap_data->idx_ref = av_buffer_ref(cf->idx_ref)) ||
!(unmap_data->decoder_ref = av_buffer_ref(cf->decoder_ref))) {
if (!(unmap_data->idx_ref = av_buffer_ref(cf->idx_ref))) {
ret = AVERROR(ENOMEM);
goto copy_fail;
}
unmap_data->decoder = ff_refstruct_ref(cf->decoder);
av_pix_fmt_get_chroma_sub_sample(hwctx->sw_format, &shift_h, &shift_v);
for (i = 0; frame->linesize[i]; i++) {
@ -583,11 +575,7 @@ int ff_nvdec_start_frame(AVCodecContext *avctx, AVFrame *frame)
if (!cf)
return AVERROR(ENOMEM);
cf->decoder_ref = av_buffer_ref(ctx->decoder_ref);
if (!cf->decoder_ref) {
ret = AVERROR(ENOMEM);
goto fail;
}
cf->decoder = ff_refstruct_ref(ctx->decoder);
cf->idx_ref = av_buffer_pool_get(ctx->decoder_pool);
if (!cf->idx_ref) {
@ -645,7 +633,7 @@ fail:
int ff_nvdec_end_frame(AVCodecContext *avctx)
{
NVDECContext *ctx = avctx->internal->hwaccel_priv_data;
NVDECDecoder *decoder = (NVDECDecoder*)ctx->decoder_ref->data;
NVDECDecoder *decoder = ctx->decoder;
void *logctx = avctx;
CUVIDPICPARAMS *pp = &ctx->pic_params;

4
libavcodec/nvdec.h
View File

@ -46,7 +46,7 @@ typedef struct NVDECFrame {
unsigned int ref_idx;
AVBufferRef *idx_ref;
AVBufferRef *ref_idx_ref;
AVBufferRef *decoder_ref;
struct NVDECDecoder *decoder; ///< RefStruct reference
} NVDECFrame;
typedef struct NVDECContext {
@ -54,7 +54,7 @@ typedef struct NVDECContext {
AVBufferPool *decoder_pool;
AVBufferRef *decoder_ref;
struct NVDECDecoder *decoder; ///< RefStruct reference
uint8_t *bitstream;
int bitstream_len;