111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
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#include "audio-repack.h"
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#include <emmintrin.h>
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int check_buffer(struct audio_repack *repack,
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uint32_t frame_count)
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{
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const uint32_t new_size = frame_count * repack->base_dst_size
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+ repack->extra_dst_size;
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if (repack->packet_size < new_size) {
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repack->packet_buffer = brealloc(
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repack->packet_buffer, new_size);
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if (!repack->packet_buffer)
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return -1;
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repack->packet_size = new_size;
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}
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return 0;
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}
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/*
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Swap channel between LFE and FC, and
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squash data array
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| FL | FR |LFE | FC | BL | BR |emp |emp |
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| | x | |
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| FL | FR | FC |LFE | BL | BR |
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*/
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int repack_8to6ch_swap23(struct audio_repack *repack,
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const uint8_t *bsrc, uint32_t frame_count)
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{
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if (check_buffer(repack, frame_count) < 0)
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return -1;
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const __m128i *src = (__m128i *)bsrc;
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const __m128i *esrc = src + frame_count;
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uint32_t *dst = (uint32_t *)repack->packet_buffer;
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while (src != esrc) {
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__m128i target = _mm_load_si128(src++);
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__m128i buf = _mm_shufflelo_epi16(target, _MM_SHUFFLE(2, 3, 1, 0));
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_mm_storeu_si128((__m128i *)dst, buf);
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dst += 3;
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}
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return 0;
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}
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/*
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Swap channel between LFE and FC
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| FL | FR |LFE | FC | BL | BR |SBL |SBR |
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| | x | | | |
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| FL | FR | FC |LFE | BL | BR |SBL |SBR |
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*/
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int repack_8ch_swap23(struct audio_repack *repack,
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const uint8_t *bsrc, uint32_t frame_count)
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{
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if (check_buffer(repack, frame_count) < 0)
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return -1;
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const __m128i *src = (__m128i *)bsrc;
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const __m128i *esrc = src + frame_count;
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__m128i *dst = (__m128i *)repack->packet_buffer;
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while (src != esrc) {
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__m128i target = _mm_load_si128(src++);
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__m128i buf = _mm_shufflelo_epi16(target, _MM_SHUFFLE(2, 3, 1, 0));
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_mm_store_si128(dst++, buf);
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}
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return 0;
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}
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int audio_repack_init(struct audio_repack *repack,
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audio_repack_mode_t repack_mode, uint8_t sample_bit)
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{
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memset(repack, 0, sizeof(*repack));
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if (sample_bit != 16)
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return -1;
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switch (repack_mode) {
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case repack_mode_8to6ch_swap23:
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repack->base_src_size = 8 * (16 / 8);
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repack->base_dst_size = 6 * (16 / 8);
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repack->extra_dst_size = 2;
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repack->repack_func = &repack_8to6ch_swap23;
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break;
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case repack_mode_8ch_swap23:
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repack->base_src_size = 8 * (16 / 8);
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repack->base_dst_size = 8 * (16 / 8);
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repack->extra_dst_size = 0;
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repack->repack_func = &repack_8ch_swap23;
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break;
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default: return -1;
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}
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return 0;
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}
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void audio_repack_free(struct audio_repack *repack)
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{
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if (repack->packet_buffer)
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bfree(repack->packet_buffer);
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memset(repack, 0, sizeof(*repack));
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}
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