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avcodec/dca*: Make decoder init-threadsafe
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
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@ -124,21 +124,15 @@ static const uint16_t channel_layouts[7] = {
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static float cos_tab[256];
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static float lpc_tab[16];
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static av_cold void init_tables(void)
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av_cold void ff_dca_lbr_init_tables(void)
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{
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static int initialized;
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int i;
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if (initialized)
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return;
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for (i = 0; i < 256; i++)
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cos_tab[i] = cos(M_PI * i / 128);
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for (i = 0; i < 16; i++)
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lpc_tab[i] = sin((i - 8) * (M_PI / ((i < 8) ? 17 : 15)));
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initialized = 1;
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}
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static int parse_lfe_24(DCALbrDecoder *s)
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@ -1818,8 +1812,6 @@ av_cold void ff_dca_lbr_flush(DCALbrDecoder *s)
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av_cold int ff_dca_lbr_init(DCALbrDecoder *s)
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{
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init_tables();
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if (!(s->fdsp = avpriv_float_dsp_alloc(0)))
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return AVERROR(ENOMEM);
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@ -129,6 +129,7 @@ typedef struct DCALbrDecoder {
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int ff_dca_lbr_parse(DCALbrDecoder *s, uint8_t *data, DCAExssAsset *asset);
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int ff_dca_lbr_filter_frame(DCALbrDecoder *s, AVFrame *frame);
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av_cold void ff_dca_lbr_flush(DCALbrDecoder *s);
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av_cold void ff_dca_lbr_init_tables(void);
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av_cold int ff_dca_lbr_init(DCALbrDecoder *s);
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av_cold void ff_dca_lbr_close(DCALbrDecoder *s);
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@ -20,6 +20,7 @@
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#include "libavutil/opt.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/thread.h"
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#include "dcadec.h"
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#include "dcahuff.h"
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@ -318,8 +319,15 @@ static av_cold int dcadec_close(AVCodecContext *avctx)
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return 0;
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}
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static av_cold void dcadec_init_static(void)
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{
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ff_dca_lbr_init_tables();
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ff_dca_init_vlcs();
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}
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static av_cold int dcadec_init(AVCodecContext *avctx)
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{
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static AVOnce init_static_once = AV_ONCE_INIT;
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DCAContext *s = avctx->priv_data;
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s->avctx = avctx;
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@ -328,8 +336,6 @@ static av_cold int dcadec_init(AVCodecContext *avctx)
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s->xll.avctx = avctx;
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s->lbr.avctx = avctx;
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ff_dca_init_vlcs();
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if (ff_dca_core_init(&s->core) < 0)
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return AVERROR(ENOMEM);
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@ -362,6 +368,8 @@ static av_cold int dcadec_init(AVCodecContext *avctx)
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break;
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}
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ff_thread_once(&init_static_once, dcadec_init_static);
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return 0;
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}
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@ -396,5 +404,5 @@ const AVCodec ff_dca_decoder = {
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AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE },
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.priv_class = &dcadec_class,
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.profiles = NULL_IF_CONFIG_SMALL(ff_dca_profiles),
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.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
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};
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@ -1263,12 +1263,8 @@ VLC ff_dca_vlc_rsd;
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av_cold void ff_dca_init_vlcs(void)
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{
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static VLC_TYPE dca_table[30214][2];
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static int vlcs_initialized = 0;
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int i, j, k = 0;
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if (vlcs_initialized)
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return;
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#define DCA_INIT_VLC(vlc, a, b, c, d) \
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do { \
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vlc.table = &dca_table[vlc_offs[k]]; \
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@ -1331,8 +1327,6 @@ av_cold void ff_dca_init_vlcs(void)
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LBR_INIT_VLC(ff_dca_vlc_grid_2, grid_2, 9);
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LBR_INIT_VLC(ff_dca_vlc_grid_3, grid_3, 9);
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LBR_INIT_VLC(ff_dca_vlc_rsd, rsd, 6);
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vlcs_initialized = 1;
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}
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uint32_t ff_dca_vlc_calc_quant_bits(int *values, uint8_t n, uint8_t sel, uint8_t table)
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