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avcodec/wavpack: Use RefStruct API for DSD context 

It avoids allocations and the corresponding error checks.
It also avoids indirections and casts.

Reviewed-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2022-08-04 12:42:12 +02:00
parent e1ba00ac8f
commit 05f557b259
1 changed files with 8 additions and 17 deletions
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25
libavcodec/wavpack.c
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@ -28,6 +28,7 @@
#include "bytestream.h"
#include "codec_internal.h"
#include "get_bits.h"
#include "refstruct.h"
#include "thread.h"
#include "threadframe.h"
#include "unary.h"
@ -110,8 +111,7 @@ typedef struct WavpackContext {
ThreadFrame curr_frame, prev_frame;
Modulation modulation;
AVBufferRef *dsd_ref;
DSDContext *dsdctx;
DSDContext *dsdctx; ///< RefStruct reference
int dsd_channels;
} WavpackContext;
@ -990,9 +990,8 @@ static int wv_dsd_reset(WavpackContext *s, int channels)
{
int i;
s->dsdctx = NULL;
s->dsd_channels = 0;
av_buffer_unref(&s->dsd_ref);
ff_refstruct_unref(&s->dsdctx);
if (!channels)
return 0;
@ -1000,10 +999,9 @@ static int wv_dsd_reset(WavpackContext *s, int channels)
if (channels > INT_MAX / sizeof(*s->dsdctx))
return AVERROR(EINVAL);
s->dsd_ref = av_buffer_allocz(channels * sizeof(*s->dsdctx));
if (!s->dsd_ref)
s->dsdctx = ff_refstruct_allocz(channels * sizeof(*s->dsdctx));
if (!s->dsdctx)
return AVERROR(ENOMEM);
s->dsdctx = (DSDContext*)s->dsd_ref->data;
s->dsd_channels = channels;
for (i = 0; i < channels; i++)
@ -1028,15 +1026,8 @@ static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
return ret;
}
fdst->dsdctx = NULL;
fdst->dsd_channels = 0;
ret = av_buffer_replace(&fdst->dsd_ref, fsrc->dsd_ref);
if (ret < 0)
return ret;
if (fsrc->dsd_ref) {
fdst->dsdctx = (DSDContext*)fdst->dsd_ref->data;
fdst->dsd_channels = fsrc->dsd_channels;
}
ff_refstruct_replace(&fdst->dsdctx, fsrc->dsdctx);
fdst->dsd_channels = fsrc->dsd_channels;
return 0;
}
@ -1076,7 +1067,7 @@ static av_cold int wavpack_decode_end(AVCodecContext *avctx)
ff_thread_release_ext_buffer(avctx, &s->prev_frame);
av_frame_free(&s->prev_frame.f);
av_buffer_unref(&s->dsd_ref);
ff_refstruct_unref(&s->dsdctx);
return 0;
}