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Allocate trellis tables on heap only when needed.

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Originally committed as revision 16945 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Benjamin Larsson 2009-02-02 18:51:02 +00:00
parent 426a6f34a0
commit aa8d024ce2
1 changed files with 16 additions and 4 deletions
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20
libavcodec/nellymoserenc.c
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@ -44,6 +44,7 @@
#define POW_TABLE_SIZE (1<<11)
#define POW_TABLE_OFFSET 3
#define OPT_SIZE ((1<<15) + 3000)
typedef struct NellyMoserEncodeContext {
AVCodecContext *avctx;
@ -54,6 +55,8 @@ typedef struct NellyMoserEncodeContext {
MDCTContext mdct_ctx;
DECLARE_ALIGNED_16(float, mdct_out[NELLY_SAMPLES]);
DECLARE_ALIGNED_16(float, buf[2][3 * NELLY_BUF_LEN]); ///< sample buffer
float (*opt )[NELLY_BANDS];
uint8_t (*path)[NELLY_BANDS];
} NellyMoserEncodeContext;
static float pow_table[POW_TABLE_SIZE]; ///< -pow(2, -i / 2048.0 - 3.0);
@ -149,6 +152,11 @@ static av_cold int encode_init(AVCodecContext *avctx)
for (i = 0; i < POW_TABLE_SIZE; i++)
pow_table[i] = -pow(2, -i / 2048.0 - 3.0 + POW_TABLE_OFFSET);
if (s->avctx->trellis) {
s->opt = av_malloc(NELLY_BANDS * OPT_SIZE * sizeof(float ));
s->path = av_malloc(NELLY_BANDS * OPT_SIZE * sizeof(uint8_t));
}
return 0;
}
@ -157,6 +165,12 @@ static av_cold int encode_end(AVCodecContext *avctx)
NellyMoserEncodeContext *s = avctx->priv_data;
ff_mdct_end(&s->mdct_ctx);
if (s->avctx->trellis) {
av_free(s->opt);
av_free(s->path);
}
return 0;
}
@ -184,8 +198,6 @@ static void get_exponent_greedy(NellyMoserEncodeContext *s, float *cand, int *id
}
}
#define OPT_SIZE ((1<<15) + 3000)
static inline float distance(float x, float y, int band)
{
//return pow(fabs(x-y), 2.0);
@ -198,8 +210,8 @@ static void get_exponent_dynamic(NellyMoserEncodeContext *s, float *cand, int *i
int i, j, band, best_idx;
float power_candidate, best_val;
float opt[NELLY_BANDS][OPT_SIZE];
int path[NELLY_BANDS][OPT_SIZE];
float (*opt )[NELLY_BANDS] = s->opt ;
uint8_t(*path)[NELLY_BANDS] = s->path;
for (i = 0; i < NELLY_BANDS * OPT_SIZE; i++) {
opt[0][i] = INFINITY;