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atrac3: initialize static tables in AVCodec.init_static_data()

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This commit is contained in:
Justin Ruggles 2012-10-18 23:04:03 -04:00
parent 78edce3f19
commit 5d1007f74d
1 changed files with 27 additions and 26 deletions
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53
libavcodec/atrac3.c
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@ -117,6 +117,7 @@ typedef struct ATRAC3Context {
} ATRAC3Context;
static DECLARE_ALIGNED(32, float, mdct_window)[MDCT_SIZE];
static VLC_TYPE atrac3_vlc_table[4096][2];
static VLC spectral_coeff_tab[7];
static float gain_tab1[16];
static float gain_tab2[31];
@ -838,14 +839,37 @@ static int atrac3_decode_frame(AVCodecContext *avctx, void *data,
return avctx->block_align;
}
static void atrac3_init_static_data(AVCodec *codec)
{
int i;
init_atrac3_window();
ff_atrac_generate_tables();
/* Initialize the VLC tables. */
for (i = 0; i < 7; i++) {
spectral_coeff_tab[i].table = &atrac3_vlc_table[atrac3_vlc_offs[i]];
spectral_coeff_tab[i].table_allocated = atrac3_vlc_offs[i + 1] -
atrac3_vlc_offs[i ];
init_vlc(&spectral_coeff_tab[i], 9, huff_tab_sizes[i],
huff_bits[i], 1, 1,
huff_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
}
/* Generate gain tables */
for (i = 0; i < 16; i++)
gain_tab1[i] = powf(2.0, (4 - i));
for (i = -15; i < 16; i++)
gain_tab2[i + 15] = powf(2.0, i * -0.125);
}
static av_cold int atrac3_decode_init(AVCodecContext *avctx)
{
int i, ret;
int version, delay, samples_per_frame, frame_factor;
const uint8_t *edata_ptr = avctx->extradata;
ATRAC3Context *q = avctx->priv_data;
static VLC_TYPE atrac3_vlc_table[4096][2];
static int vlcs_initialized = 0;
/* Take data from the AVCodecContext (RM container). */
q->sample_rate = avctx->sample_rate;
@ -935,20 +959,6 @@ static av_cold int atrac3_decode_init(AVCodecContext *avctx)
if (q->decoded_bytes_buffer == NULL)
return AVERROR(ENOMEM);
/* Initialize the VLC tables. */
if (!vlcs_initialized) {
for (i = 0; i < 7; i++) {
spectral_coeff_tab[i].table = &atrac3_vlc_table[atrac3_vlc_offs[i]];
spectral_coeff_tab[i].table_allocated = atrac3_vlc_offs[i + 1] -
atrac3_vlc_offs[i ];
init_vlc(&spectral_coeff_tab[i], 9, huff_tab_sizes[i],
huff_bits[i], 1, 1,
huff_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
}
vlcs_initialized = 1;
}
avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
/* initialize the MDCT transform */
@ -958,16 +968,6 @@ static av_cold int atrac3_decode_init(AVCodecContext *avctx)
return ret;
}
init_atrac3_window();
ff_atrac_generate_tables();
/* Generate gain tables */
for (i = 0; i < 16; i++)
gain_tab1[i] = powf(2.0, (4 - i));
for (i = -15; i < 16; i++)
gain_tab2[i + 15] = powf(2.0, i * -0.125);
/* init the joint-stereo decoding data */
q->weighting_delay[0] = 0;
q->weighting_delay[1] = 7;
@ -1003,6 +1003,7 @@ AVCodec ff_atrac3_decoder = {
.id = AV_CODEC_ID_ATRAC3,
.priv_data_size = sizeof(ATRAC3Context),
.init = atrac3_decode_init,
.init_static_data = atrac3_init_static_data,
.close = atrac3_decode_close,
.decode = atrac3_decode_frame,
.capabilities = CODEC_CAP_SUBFRAMES | CODEC_CAP_DR1,