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avcodec/vda_h264: use av_buffer to manage buffers

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This patch fixes a leak of buffer when seeking occurs.
It adds a flag in struct vda_context for compatibility with apps which
currently use it. If the flag is not set, the hwaccel will behave like
before.

Signed-off-by: Sebastien Zwickert <dilaroga@gmail.com>
This commit is contained in:
Xidorn Quan 2013-05-21 12:12:30 +08:00 committed by Sebastien Zwickert
parent 53ec1c811e
commit ffd7fd7944
2 changed files with 37 additions and 0 deletions
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11
libavcodec/vda.h
View File

@ -134,6 +134,17 @@ struct vda_context {
* - decoding: Set/Unset by libavcodec.
*/
int priv_allocated_size;
/**
* Use av_buffer to manage buffer.
* When the flag is set, the CVPixelBuffers returned by the decoder will
* be released automatically, so you have to retain them if necessary.
* Not setting this flag may cause memory leak.
*
* encoding: unused
* decoding: Set by user.
*/
int use_ref_buffer;
};
/** Create the video decoder. */

26
libavcodec/vda_h264.c
View File

@ -28,6 +28,9 @@
#include "libavutil/avutil.h"
#include "h264.h"
struct vda_buffer {
CVPixelBufferRef cv_buffer;
};
/* Decoder callback that adds the vda frame to the queue in display order. */
static void vda_decoder_callback (void *vda_hw_ctx,
@ -108,11 +111,20 @@ static int vda_h264_decode_slice(AVCodecContext *avctx,
return 0;
}
static void vda_h264_release_buffer(void *opaque, uint8_t *data)
{
struct vda_buffer *context = opaque;
CVPixelBufferRelease(context->cv_buffer);
av_free(context);
}
static int vda_h264_end_frame(AVCodecContext *avctx)
{
H264Context *h = avctx->priv_data;
struct vda_context *vda_ctx = avctx->hwaccel_context;
AVFrame *frame = &h->cur_pic_ptr->f;
struct vda_buffer *context;
AVBufferRef *buffer;
int status;
if (!vda_ctx->decoder || !vda_ctx->priv_bitstream)
@ -124,6 +136,20 @@ static int vda_h264_end_frame(AVCodecContext *avctx)
if (status)
av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);
if (!vda_ctx->use_ref_buffer || status)
return status;
context = av_mallocz(sizeof(*context));
buffer = av_buffer_create(NULL, 0, vda_h264_release_buffer, context, 0);
if (!context || !buffer) {
CVPixelBufferRelease(vda_ctx->cv_buffer);
av_free(context);
return -1;
}
context->cv_buffer = vda_ctx->cv_buffer;
frame->buf[3] = buffer;
return status;
}