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truehd: break out part of rematrix_channels into platform-specific callback.

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Verified with profiling that this doesn't have a measurable effect upon
overall performance.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Ben Avison
2014-03-20 18:58:36 +00:00
committed by Martin Storsjö
parent 15a29c39d9
commit 4e5aa080bb
3 changed files with 68 additions and 25 deletions
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33
libavcodec/mlpdsp.c
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@@ -57,9 +57,42 @@ static void mlp_filter_channel(int32_t *state, const int32_t *coeff,
}
}
void ff_mlp_rematrix_channel(int32_t *samples,
const int32_t *coeffs,
const uint8_t *bypassed_lsbs,
const int8_t *noise_buffer,
int index,
unsigned int dest_ch,
uint16_t blockpos,
unsigned int maxchan,
int matrix_noise_shift,
int access_unit_size_pow2,
int32_t mask)
{
unsigned int src_ch, i;
int index2 = 2 * index + 1;
for (i = 0; i < blockpos; i++) {
int64_t accum = 0;
for (src_ch = 0; src_ch <= maxchan; src_ch++)
accum += (int64_t) samples[src_ch] * coeffs[src_ch];
if (matrix_noise_shift) {
index &= access_unit_size_pow2 - 1;
accum += noise_buffer[index] << (matrix_noise_shift + 7);
index += index2;
}
samples[dest_ch] = ((accum >> 14) & mask) + *bypassed_lsbs;
bypassed_lsbs += MAX_CHANNELS;
samples += MAX_CHANNELS;
}
}
av_cold void ff_mlpdsp_init(MLPDSPContext *c)
{
c->mlp_filter_channel = mlp_filter_channel;
c->mlp_rematrix_channel = ff_mlp_rematrix_channel;
if (ARCH_ARM)
ff_mlpdsp_init_arm(c);
if (ARCH_X86)