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Code Issues Releases Activity

vda: use hwaccel private data for internal bitstream buffer

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This commit is contained in:
Anton Khirnov 2014-03-06 19:02:29 +01:00 committed by Luca Barbato
parent 66e6c8a7b4
commit 31a46750c7
2 changed files with 38 additions and 18 deletions
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6
libavcodec/vda.h
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@ -112,17 +112,17 @@ struct vda_context {
OSType cv_pix_fmt_type;
/**
* The current bitstream buffer.
* unused
*/
uint8_t *priv_bitstream;
/**
* The current size of the bitstream.
* unused
*/
int priv_bitstream_size;
/**
* The reference size used for fast reallocation.
* unused
*/
int priv_allocated_size;
};

50
libavcodec/vda_h264.c
View File

@ -28,6 +28,17 @@
#include "h264.h"
#include "vda.h"
typedef struct VDAContext {
// The current bitstream buffer.
uint8_t *bitstream;
// The current size of the bitstream.
int bitstream_size;
// The reference size used for fast reallocation.
int allocated_size;
} VDAContext;
/* Decoder callback that adds the VDA frame to the queue in display order. */
static void vda_decoder_callback(void *vda_hw_ctx,
CFDictionaryRef user_info,
@ -46,15 +57,15 @@ static void vda_decoder_callback(void *vda_hw_ctx,
vda_ctx->cv_buffer = CVPixelBufferRetain(image_buffer);
}
static int vda_sync_decode(struct vda_context *vda_ctx)
static int vda_sync_decode(VDAContext *ctx, struct vda_context *vda_ctx)
{
OSStatus status;
CFDataRef coded_frame;
uint32_t flush_flags = 1 << 0; ///< kVDADecoderFlush_emitFrames
coded_frame = CFDataCreate(kCFAllocatorDefault,
vda_ctx->priv_bitstream,
vda_ctx->priv_bitstream_size);
ctx->bitstream,
ctx->bitstream_size);
status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, NULL);
@ -71,12 +82,13 @@ static int vda_h264_start_frame(AVCodecContext *avctx,
av_unused const uint8_t *buffer,
av_unused uint32_t size)
{
VDAContext *vda = avctx->internal->hwaccel_priv_data;
struct vda_context *vda_ctx = avctx->hwaccel_context;
if (!vda_ctx->decoder)
return -1;
vda_ctx->priv_bitstream_size = 0;
vda->bitstream_size = 0;
return 0;
}
@ -85,24 +97,25 @@ static int vda_h264_decode_slice(AVCodecContext *avctx,
const uint8_t *buffer,
uint32_t size)
{
VDAContext *vda = avctx->internal->hwaccel_priv_data;
struct vda_context *vda_ctx = avctx->hwaccel_context;
void *tmp;
if (!vda_ctx->decoder)
return -1;
tmp = av_fast_realloc(vda_ctx->priv_bitstream,
&vda_ctx->priv_allocated_size,
vda_ctx->priv_bitstream_size + size + 4);
tmp = av_fast_realloc(vda->bitstream,
&vda->allocated_size,
vda->bitstream_size + size + 4);
if (!tmp)
return AVERROR(ENOMEM);
vda_ctx->priv_bitstream = tmp;
vda->bitstream = tmp;
AV_WB32(vda_ctx->priv_bitstream + vda_ctx->priv_bitstream_size, size);
memcpy(vda_ctx->priv_bitstream + vda_ctx->priv_bitstream_size + 4, buffer, size);
AV_WB32(vda->bitstream + vda->bitstream_size, size);
memcpy(vda->bitstream + vda->bitstream_size + 4, buffer, size);
vda_ctx->priv_bitstream_size += size + 4;
vda->bitstream_size += size + 4;
return 0;
}
@ -110,14 +123,15 @@ static int vda_h264_decode_slice(AVCodecContext *avctx,
static int vda_h264_end_frame(AVCodecContext *avctx)
{
H264Context *h = avctx->priv_data;
VDAContext *vda = avctx->internal->hwaccel_priv_data;
struct vda_context *vda_ctx = avctx->hwaccel_context;
AVFrame *frame = &h->cur_pic_ptr->f;
int status;
if (!vda_ctx->decoder || !vda_ctx->priv_bitstream)
if (!vda_ctx->decoder || !vda->bitstream)
return -1;
status = vda_sync_decode(vda_ctx);
status = vda_sync_decode(vda, vda_ctx);
frame->data[3] = (void*)vda_ctx->cv_buffer;
if (status)
@ -217,11 +231,15 @@ int ff_vda_destroy_decoder(struct vda_context *vda_ctx)
if (vda_ctx->decoder)
status = VDADecoderDestroy(vda_ctx->decoder);
av_freep(&vda_ctx->priv_bitstream);
return status;
}
static void vda_h264_uninit(AVCodecContext *avctx)
{
VDAContext *vda = avctx->internal->priv_data;
av_freep(&vda->bitstream);
}
AVHWAccel ff_h264_vda_hwaccel = {
.name = "h264_vda",
.type = AVMEDIA_TYPE_VIDEO,
@ -230,4 +248,6 @@ AVHWAccel ff_h264_vda_hwaccel = {
.start_frame = vda_h264_start_frame,
.decode_slice = vda_h264_decode_slice,
.end_frame = vda_h264_end_frame,
.uninit = vda_h264_uninit,
.priv_data_size = sizeof(VDAContext),
};