diff options
Diffstat (limited to 'scene/resources/audio_stream_sample.cpp')
| -rw-r--r-- | scene/resources/audio_stream_sample.cpp | 56 |
1 files changed, 36 insertions, 20 deletions
diff --git a/scene/resources/audio_stream_sample.cpp b/scene/resources/audio_stream_sample.cpp index dafcf12183..f02e7987a9 100644 --- a/scene/resources/audio_stream_sample.cpp +++ b/scene/resources/audio_stream_sample.cpp @@ -72,8 +72,9 @@ float AudioStreamPlaybackSample::get_playback_position() const { } void AudioStreamPlaybackSample::seek(float p_time) { - if (base->format == AudioStreamSample::FORMAT_IMA_ADPCM) + if (base->format == AudioStreamSample::FORMAT_IMA_ADPCM) { return; //no seeking in ima-adpcm + } float max = base->get_length(); if (p_time < 0) { @@ -93,8 +94,9 @@ void AudioStreamPlaybackSample::do_resample(const Depth *p_src, AudioFrame *p_ds while (amount) { amount--; int64_t pos = offset >> MIX_FRAC_BITS; - if (is_stereo && !is_ima_adpcm) + if (is_stereo && !is_ima_adpcm) { pos <<= 1; + } if (is_ima_adpcm) { int64_t sample_pos = pos + ima_adpcm[0].window_ofs; @@ -129,26 +131,33 @@ void AudioStreamPlaybackSample::do_resample(const Depth *p_src, AudioFrame *p_ds step = _ima_adpcm_step_table[ima_adpcm[i].step_index]; ima_adpcm[i].step_index += _ima_adpcm_index_table[nibble]; - if (ima_adpcm[i].step_index < 0) + if (ima_adpcm[i].step_index < 0) { ima_adpcm[i].step_index = 0; - if (ima_adpcm[i].step_index > 88) + } + if (ima_adpcm[i].step_index > 88) { ima_adpcm[i].step_index = 88; + } diff = step >> 3; - if (nibble & 1) + if (nibble & 1) { diff += step >> 2; - if (nibble & 2) + } + if (nibble & 2) { diff += step >> 1; - if (nibble & 4) + } + if (nibble & 4) { diff += step; - if (nibble & 8) + } + if (nibble & 8) { diff = -diff; + } ima_adpcm[i].predictor += diff; - if (ima_adpcm[i].predictor < -0x8000) + if (ima_adpcm[i].predictor < -0x8000) { ima_adpcm[i].predictor = -0x8000; - else if (ima_adpcm[i].predictor > 0x7FFF) + } else if (ima_adpcm[i].predictor > 0x7FFF) { ima_adpcm[i].predictor = 0x7FFF; + } /* store loop if there */ if (ima_adpcm[i].last_nibble == ima_adpcm[i].loop_pos) { @@ -167,13 +176,15 @@ void AudioStreamPlaybackSample::do_resample(const Depth *p_src, AudioFrame *p_ds } else { final = p_src[pos]; - if (is_stereo) + if (is_stereo) { final_r = p_src[pos + 1]; + } if (sizeof(Depth) == 1) { /* conditions will not exist anymore when compiled! */ final <<= 8; - if (is_stereo) + if (is_stereo) { final_r <<= 8; + } } if (is_stereo) { @@ -185,15 +196,17 @@ void AudioStreamPlaybackSample::do_resample(const Depth *p_src, AudioFrame *p_ds if (sizeof(Depth) == 1) { next <<= 8; - if (is_stereo) + if (is_stereo) { next_r <<= 8; + } } int32_t frac = int64_t(offset & MIX_FRAC_MASK); final = final + ((next - final) * frac >> MIX_FRAC_BITS); - if (is_stereo) + if (is_stereo) { final_r = final_r + ((next_r - final_r) * frac >> MIX_FRAC_BITS); + } } if (!is_stereo) { @@ -353,23 +366,26 @@ void AudioStreamPlaybackSample::mix(AudioFrame *p_buffer, float p_rate_scale, in switch (base->format) { case AudioStreamSample::FORMAT_8_BITS: { - if (is_stereo) + if (is_stereo) { do_resample<int8_t, true, false>((int8_t *)data, dst_buff, offset, increment, target, ima_adpcm); - else + } else { do_resample<int8_t, false, false>((int8_t *)data, dst_buff, offset, increment, target, ima_adpcm); + } } break; case AudioStreamSample::FORMAT_16_BITS: { - if (is_stereo) + if (is_stereo) { do_resample<int16_t, true, false>((int16_t *)data, dst_buff, offset, increment, target, ima_adpcm); - else + } else { do_resample<int16_t, false, false>((int16_t *)data, dst_buff, offset, increment, target, ima_adpcm); + } } break; case AudioStreamSample::FORMAT_IMA_ADPCM: { - if (is_stereo) + if (is_stereo) { do_resample<int8_t, true, true>((int8_t *)data, dst_buff, offset, increment, target, ima_adpcm); - else + } else { do_resample<int8_t, false, true>((int8_t *)data, dst_buff, offset, increment, target, ima_adpcm); + } } break; } |