#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
#include <cstddef>
+#ifdef __SSE2__
+#include <immintrin.h>
+#endif
#include <DeckLinkAPI.h>
#include <DeckLinkAPIConfiguration.h>
#include <DeckLinkAPIModes.h>
#include "bmusb/bmusb.h"
+#define FRAME_SIZE (8 << 20) // 8 MB.
+
using namespace std;
using namespace std::placeholders;
namespace {
// TODO: Support stride.
-// TODO: Support AVX2 (adapt from bmusb).
void memcpy_interleaved(uint8_t *dest1, uint8_t *dest2, const uint8_t *src, size_t n)
{
assert(n % 2 == 0);
}
}
+#ifdef __SSE2__
+
+// Returns the number of bytes consumed.
+size_t memcpy_interleaved_fastpath(uint8_t *dest1, uint8_t *dest2, const uint8_t *src, size_t n)
+{
+ const uint8_t *limit = src + n;
+ size_t consumed = 0;
+
+ // Align end to 32 bytes.
+ limit = (const uint8_t *)(intptr_t(limit) & ~31);
+
+ if (src >= limit) {
+ return 0;
+ }
+
+ // Process [0,31] bytes, such that start gets aligned to 32 bytes.
+ const uint8_t *aligned_src = (const uint8_t *)(intptr_t(src + 31) & ~31);
+ if (aligned_src != src) {
+ size_t n2 = aligned_src - src;
+ memcpy_interleaved(dest1, dest2, src, n2);
+ dest1 += n2 / 2;
+ dest2 += n2 / 2;
+ if (n2 % 1) {
+ swap(dest1, dest2);
+ }
+ src = aligned_src;
+ consumed += n2;
+ }
+
+ // Make the length a multiple of 64.
+ if (((limit - src) % 64) != 0) {
+ limit -= 32;
+ }
+ assert(((limit - src) % 64) == 0);
+
+#if __AVX2__
+ const __restrict __m256i *in = (const __m256i *)src;
+ __restrict __m256i *out1 = (__m256i *)dest1;
+ __restrict __m256i *out2 = (__m256i *)dest2;
+
+ __m256i shuffle_cw = _mm256_set_epi8(
+ 15, 13, 11, 9, 7, 5, 3, 1, 14, 12, 10, 8, 6, 4, 2, 0,
+ 15, 13, 11, 9, 7, 5, 3, 1, 14, 12, 10, 8, 6, 4, 2, 0);
+ while (in < (const __m256i *)limit) {
+ // Note: For brevity, comments show lanes as if they were 2x64-bit (they're actually 2x128).
+ __m256i data1 = _mm256_stream_load_si256(in); // AaBbCcDd EeFfGgHh
+ __m256i data2 = _mm256_stream_load_si256(in + 1); // IiJjKkLl MmNnOoPp
+
+ data1 = _mm256_shuffle_epi8(data1, shuffle_cw); // ABCDabcd EFGHefgh
+ data2 = _mm256_shuffle_epi8(data2, shuffle_cw); // IJKLijkl MNOPmnop
+
+ data1 = _mm256_permute4x64_epi64(data1, 0b11011000); // ABCDEFGH abcdefgh
+ data2 = _mm256_permute4x64_epi64(data2, 0b11011000); // IJKLMNOP ijklmnop
+
+ __m256i lo = _mm256_permute2x128_si256(data1, data2, 0b00100000);
+ __m256i hi = _mm256_permute2x128_si256(data1, data2, 0b00110001);
+
+ _mm256_storeu_si256(out1, lo);
+ _mm256_storeu_si256(out2, hi);
+
+ in += 2;
+ ++out1;
+ ++out2;
+ consumed += 64;
+ }
+#else
+ const __restrict __m128i *in = (const __m128i *)src;
+ __restrict __m128i *out1 = (__m128i *)dest1;
+ __restrict __m128i *out2 = (__m128i *)dest2;
+
+ __m128i mask_lower_byte = _mm_set1_epi16(0x00ff);
+ while (in < (const __m128i *)limit) {
+ __m128i data1 = _mm_load_si128(in);
+ __m128i data2 = _mm_load_si128(in + 1);
+ __m128i data1_lo = _mm_and_si128(data1, mask_lower_byte);
+ __m128i data2_lo = _mm_and_si128(data2, mask_lower_byte);
+ __m128i data1_hi = _mm_srli_epi16(data1, 8);
+ __m128i data2_hi = _mm_srli_epi16(data2, 8);
+ __m128i lo = _mm_packus_epi16(data1_lo, data2_lo);
+ _mm_storeu_si128(out1, lo);
+ __m128i hi = _mm_packus_epi16(data1_hi, data2_hi);
+ _mm_storeu_si128(out2, hi);
+
+ in += 2;
+ ++out1;
+ ++out2;
+ consumed += 32;
+ }
+#endif
+
+ return consumed;
+}
+
+#endif // __SSE2__
+
} // namespace
DeckLinkCapture::DeckLinkCapture(IDeckLink *card, int card_index)
exit(1);
}
- if (input->EnableAudioInput(48000, bmdAudioSampleType16bitInteger, 2) != S_OK) {
+ if (input->EnableAudioInput(48000, bmdAudioSampleType32bitInteger, 2) != S_OK) {
fprintf(stderr, "Failed to enable audio input for card %d\n", card_index);
exit(1);
}
FrameAllocator::Frame current_video_frame, current_audio_frame;
VideoFormat video_format;
+ AudioFormat audio_format;
if (video_frame) {
video_format.has_signal = !(video_frame->GetFlags() & bmdFrameHasNoInputSource);
const uint8_t *frame_bytes;
video_frame->GetBytes((void **)&frame_bytes);
- memcpy_interleaved(current_video_frame.data, current_video_frame.data2,
- frame_bytes, width * height * 2);
- current_video_frame.len += width * height * 2;
+ uint8_t *data = current_video_frame.data;
+ uint8_t *data2 = current_video_frame.data2;
+ size_t num_bytes = width * height * 2;
+#ifdef __SSE2__
+ size_t consumed = memcpy_interleaved_fastpath(data, data2, frame_bytes, num_bytes);
+ frame_bytes += consumed;
+ data += consumed / 2;
+ data2 += consumed / 2;
+ if (num_bytes % 2) {
+ swap(data, data2);
+ }
+ current_video_frame.len += consumed;
+ num_bytes -= consumed;
+#endif
+
+ if (num_bytes > 0) {
+ memcpy_interleaved(data, data2, frame_bytes, num_bytes);
+ }
+ current_video_frame.len += num_bytes;
video_format.width = width;
video_format.height = height;
}
}
+ if (audio_frame) {
+ int num_samples = audio_frame->GetSampleFrameCount();
+
+ current_audio_frame = audio_frame_allocator->alloc_frame();
+ if (current_audio_frame.data != nullptr) {
+ const uint8_t *frame_bytes;
+ audio_frame->GetBytes((void **)&frame_bytes);
+ current_audio_frame.len = sizeof(int32_t) * 2 * num_samples;
+
+ memcpy(current_audio_frame.data, frame_bytes, current_audio_frame.len);
+
+ audio_format.bits_per_sample = 32;
+ audio_format.num_channels = 2;
+ }
+ }
+
if (current_video_frame.data != nullptr || current_audio_frame.data != nullptr) {
// TODO: Put into a queue and put into a dequeue thread, if the
// BlackMagic drivers don't already do that for us?
frame_callback(timecode,
current_video_frame, /*video_offset=*/0, video_format,
- current_audio_frame, /*audio_offset=*/0, 0x0000);
+ current_audio_frame, /*audio_offset=*/0, audio_format);
}
timecode++;
return S_OK;
}
+void DeckLinkCapture::configure_card()
+{
+ if (video_frame_allocator == nullptr) {
+ set_video_frame_allocator(new MallocFrameAllocator(FRAME_SIZE, NUM_QUEUED_VIDEO_FRAMES)); // FIXME: leak.
+ }
+ if (audio_frame_allocator == nullptr) {
+ set_audio_frame_allocator(new MallocFrameAllocator(65536, NUM_QUEUED_AUDIO_FRAMES)); // FIXME: leak.
+ }
+}
+
void DeckLinkCapture::start_bm_capture()
{
if (input->StartStreams() != S_OK) {
projects / nageru / blobdiff