diff options
| author | Max Poliakovski <maximumspatium@googlemail.com> | 2015-06-06 23:28:47 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2015-06-08 04:26:04 +0200 |
| commit | d765e07322a139a6c3c28d9c4c36f820db78986f (patch) | |
| tree | ae23075907c4364cb756be7fe9b676e6af1b4590 /libavcodec/atrac3plusdsp.c | |
| parent | ac2dad9690ad2de60f9c0ccb63c5258f14e32777 (diff) | |
atrac3plus: add support for GHA phase inversion.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/atrac3plusdsp.c')
| -rw-r--r-- | libavcodec/atrac3plusdsp.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/libavcodec/atrac3plusdsp.c b/libavcodec/atrac3plusdsp.c index 3c68f74d25..50ac1346a2 100644 --- a/libavcodec/atrac3plusdsp.c +++ b/libavcodec/atrac3plusdsp.c @@ -116,6 +116,7 @@ av_cold void ff_atrac3p_init_wave_synth(void) * @param[in] synth_param ptr to common synthesis parameters * @param[in] waves_info parameters for each sine wave * @param[in] envelope envelope data for all waves in a group + * @param[in] fdsp ptr to floating-point DSP context * @param[in] phase_shift flag indicates 180° phase shift * @param[in] reg_offset region offset for trimming envelope data * @param[out] out receives sythesized data @@ -123,6 +124,7 @@ av_cold void ff_atrac3p_init_wave_synth(void) static void waves_synth(Atrac3pWaveSynthParams *synth_param, Atrac3pWavesData *waves_info, Atrac3pWaveEnvelope *envelope, + AVFloatDSPContext *fdsp, int phase_shift, int reg_offset, float *out) { int i, wn, inc, pos; @@ -146,6 +148,10 @@ static void waves_synth(Atrac3pWaveSynthParams *synth_param, } } + /* 180° phase shift if requested */ + if (phase_shift) + fdsp->vector_fmul_scalar(out, out, -1.0f, 128); + /* fade in with steep Hann window if requested */ if (envelope->has_start_point) { pos = (envelope->start_pos << 2) - reg_offset; @@ -216,11 +222,11 @@ void ff_atrac3p_generate_tones(Atrac3pChanUnitCtx *ch_unit, AVFloatDSPContext *f /* synthesize waves for both overlapping regions */ if (tones_now->num_wavs && reg1_env_nonzero) waves_synth(ch_unit->waves_info_prev, tones_now, &tones_now->curr_env, - ch_unit->waves_info_prev->phase_shift[sb] & ch_num, + fdsp, ch_unit->waves_info_prev->phase_shift[sb] & ch_num, 128, wavreg1); if (tones_next->num_wavs && reg2_env_nonzero) - waves_synth(ch_unit->waves_info, tones_next, &tones_next->curr_env, + waves_synth(ch_unit->waves_info, tones_next, &tones_next->curr_env, fdsp, ch_unit->waves_info->phase_shift[sb] & ch_num, 0, wavreg2); /* Hann windowing for non-faded wave signals */ |