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avcodec/interplayacm: Make decoder init-threadsafe 

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-11-29 19:07:46 +01:00 committed by Andreas Rheinhardt
parent 8d87e1ef6c
commit e6142f2695
1 changed files with 19 additions and 13 deletions
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32
libavcodec/interplayacm.c
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@ -19,6 +19,7 @@
*/
#include "libavutil/intreadwrite.h"
#include "libavutil/thread.h"
#define BITSTREAM_READER_LE
#include "avcodec.h"
@ -54,10 +55,25 @@ typedef struct InterplayACMContext {
int *midbuf;
} InterplayACMContext;
static av_cold void decode_init_static(void)
{
for (int x3 = 0; x3 < 3; x3++)
for (int x2 = 0; x2 < 3; x2++)
for (int x1 = 0; x1 < 3; x1++)
mul_3x3[x1 + x2 * 3 + x3 * 3 * 3] = x1 + (x2 << 4) + (x3 << 8);
for (int x3 = 0; x3 < 5; x3++)
for (int x2 = 0; x2 < 5; x2++)
for (int x1 = 0; x1 < 5; x1++)
mul_3x5[x1 + x2 * 5 + x3 * 5 * 5] = x1 + (x2 << 4) + (x3 << 8);
for (int x2 = 0; x2 < 11; x2++)
for (int x1 = 0; x1 < 11; x1++)
mul_2x11[x1 + x2 * 11] = x1 + (x2 << 4);
}
static av_cold int decode_init(AVCodecContext *avctx)
{
static AVOnce init_static_once = AV_ONCE_INIT;
InterplayACMContext *s = avctx->priv_data;
int x1, x2, x3;
if (avctx->extradata_size < 14)
return AVERROR_INVALIDDATA;
@ -84,17 +100,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
s->midbuf = s->ampbuf + 0x8000;
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
for (x3 = 0; x3 < 3; x3++)
for (x2 = 0; x2 < 3; x2++)
for (x1 = 0; x1 < 3; x1++)
mul_3x3[x1 + x2 * 3 + x3* 3 * 3] = x1 + (x2 << 4) + (x3 << 8);
for (x3 = 0; x3 < 5; x3++)
for (x2 = 0; x2 < 5; x2++)
for (x1 = 0; x1 < 5; x1++)
mul_3x5[x1 + x2 * 5 + x3 * 5 * 5] = x1 + (x2 << 4) + (x3 << 8);
for (x2 = 0; x2 < 11; x2++)
for (x1 = 0; x1 < 11; x1++)
mul_2x11[x1 + x2 * 11] = x1 + (x2 << 4);
ff_thread_once(&init_static_once, decode_init_static);
return 0;
}
@ -630,6 +636,6 @@ const AVCodec ff_interplay_acm_decoder = {
.close = decode_close,
.decode = decode_frame,
.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
.priv_data_size = sizeof(InterplayACMContext),
};