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diracdec: do not allocate and free slice parameters every frame

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Signed-off-by: Rostislav Pehlivanov <rpehlivanov@obe.tv>
This commit is contained in:
Rostislav Pehlivanov 2016-06-23 18:07:02 +01:00 • committed by Rostislav Pehlivanov
parent 0eb0f93109
commit dcad4677d6
1 changed files with 22 additions and 14 deletions
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34
libavcodec/diracdec.c
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@ -121,6 +121,14 @@ typedef struct Plane {
SubBand band[MAX_DWT_LEVELS][4];
} Plane;
/* Used by Low Delay and High Quality profiles */
typedef struct DiracSlice {
GetBitContext gb;
int slice_x;
int slice_y;
int bytes;
} DiracSlice;
typedef struct DiracContext {
AVCodecContext *avctx;
MpegvideoEncDSPContext mpvencdsp;
@ -167,6 +175,9 @@ typedef struct DiracContext {
int threads_num_buf; /* Current # of buffers allocated */
int thread_buf_size; /* Each thread has a buffer this size */
DiracSlice *slice_params_buf;
int slice_params_num_buf;
struct {
unsigned width;
unsigned height;
@ -417,6 +428,7 @@ static av_cold int dirac_decode_end(AVCodecContext *avctx)
av_frame_free(&s->all_frames[i].avframe);
av_freep(&s->thread_buf);
av_freep(&s->slice_params_buf);
return 0;
}
@ -724,15 +736,6 @@ static void decode_subband(DiracContext *s, GetBitContext *gb, int quant,
}
}
/* Used by Low Delay and High Quality profiles */
typedef struct DiracSlice {
GetBitContext gb;
int slice_x;
int slice_y;
int bytes;
} DiracSlice;
/**
* Dirac Specification ->
* 13.5.2 Slices. slice(sx,sy)
@ -904,9 +907,15 @@ static int decode_lowdelay(DiracContext *s)
SliceCoeffs tmp[MAX_DWT_LEVELS];
int slice_num = 0;
slices = av_mallocz_array(s->num_x, s->num_y * sizeof(DiracSlice));
if (!slices)
if (s->slice_params_num_buf != (s->num_x * s->num_y)) {
s->slice_params_buf = av_realloc_f(s->thread_buf, s->num_x * s->num_y, sizeof(DiracSlice));
if (!s->slice_params_buf) {
av_log(s->avctx, AV_LOG_ERROR, "slice params buffer allocation failure\n");
return AVERROR(ENOMEM);
}
s->slice_params_num_buf = s->num_x * s->num_y;
}
slices = s->slice_params_buf;
/* 8 becacuse that's how much the golomb reader could overread junk data
* from another plane/slice at most, and 512 because SIMD */
@ -941,7 +950,6 @@ static int decode_lowdelay(DiracContext *s)
}
if (bytes >= INT_MAX || bytes*8 > bufsize) {
av_log(s->avctx, AV_LOG_ERROR, "too many bytes\n");
av_free(slices);
return AVERROR_INVALIDDATA;
}
@ -998,7 +1006,7 @@ static int decode_lowdelay(DiracContext *s)
intra_dc_prediction_8(&s->plane[2].band[0][0]);
}
}
av_free(slices);
return 0;
}