2 * Blackmagic DeckLink input
3 * Copyright (c) 2013-2014 Luca Barbato, Deti Fliegl
4 * Copyright (c) 2014 Rafaël Carré
5 * Copyright (c) 2017 Akamai Technologies, Inc.
7 * This file is part of FFmpeg.
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 /* Include internal.h first to avoid conflict between winsock.h (used by
29 * DeckLink headers) and winsock2.h (used by libavformat) in MSVC++ builds */
31 #include "libavformat/internal.h"
34 #include <DeckLinkAPI.h>
38 #include "libavcodec/packet_internal.h"
39 #include "libavformat/avformat.h"
40 #include "libavutil/avassert.h"
41 #include "libavutil/avutil.h"
42 #include "libavutil/common.h"
43 #include "libavutil/internal.h"
44 #include "libavutil/imgutils.h"
45 #include "libavutil/intreadwrite.h"
46 #include "libavutil/time.h"
47 #include "libavutil/timecode.h"
48 #include "libavutil/mathematics.h"
49 #include "libavutil/reverse.h"
56 #include "decklink_common.h"
57 #include "decklink_dec.h"
59 #define MAX_WIDTH_VANC 1920
60 const BMDDisplayMode AUTODETECT_DEFAULT_MODE = bmdModeNTSC;
62 typedef struct VANCLineNumber {
66 int field1_vanc_start;
70 /* These VANC line numbers need not be very accurate. In any case
71 * GetBufferForVerticalBlankingLine() will return an error when invalid
72 * ancillary line number was requested. We just need to make sure that the
73 * entire VANC region is covered, while making sure we don't decode VANC of
74 * another source during switching*/
75 static VANCLineNumber vanc_line_numbers[] = {
78 {bmdModeNTSC, 11, 19, 274, 282},
79 {bmdModeNTSC2398, 11, 19, 274, 282},
80 {bmdModePAL, 7, 22, 320, 335},
81 {bmdModeNTSCp, 11, -1, -1, 39},
82 {bmdModePALp, 7, -1, -1, 45},
86 {bmdModeHD1080p2398, 8, -1, -1, 42},
87 {bmdModeHD1080p24, 8, -1, -1, 42},
88 {bmdModeHD1080p25, 8, -1, -1, 42},
89 {bmdModeHD1080p2997, 8, -1, -1, 42},
90 {bmdModeHD1080p30, 8, -1, -1, 42},
91 {bmdModeHD1080i50, 8, 20, 570, 585},
92 {bmdModeHD1080i5994, 8, 20, 570, 585},
93 {bmdModeHD1080i6000, 8, 20, 570, 585},
94 {bmdModeHD1080p50, 8, -1, -1, 42},
95 {bmdModeHD1080p5994, 8, -1, -1, 42},
96 {bmdModeHD1080p6000, 8, -1, -1, 42},
100 {bmdModeHD720p50, 8, -1, -1, 26},
101 {bmdModeHD720p5994, 8, -1, -1, 26},
102 {bmdModeHD720p60, 8, -1, -1, 26},
104 /* For all other modes, for which we don't support VANC */
105 {bmdModeUnknown, 0, -1, -1, -1}
108 class decklink_allocator : public IDeckLinkMemoryAllocator
111 decklink_allocator(): _refs(1) { }
112 virtual ~decklink_allocator() { }
114 // IDeckLinkMemoryAllocator methods
115 virtual HRESULT STDMETHODCALLTYPE AllocateBuffer(unsigned int bufferSize, void* *allocatedBuffer)
117 void *buf = av_malloc(bufferSize + AV_INPUT_BUFFER_PADDING_SIZE);
119 return E_OUTOFMEMORY;
120 *allocatedBuffer = buf;
123 virtual HRESULT STDMETHODCALLTYPE ReleaseBuffer(void* buffer)
128 virtual HRESULT STDMETHODCALLTYPE Commit() { return S_OK; }
129 virtual HRESULT STDMETHODCALLTYPE Decommit() { return S_OK; }
132 virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; }
133 virtual ULONG STDMETHODCALLTYPE AddRef(void) { return ++_refs; }
134 virtual ULONG STDMETHODCALLTYPE Release(void)
143 std::atomic<int> _refs;
147 static void decklink_object_free(void *opaque, uint8_t *data)
149 IUnknown *obj = (class IUnknown *)opaque;
154 static int get_vanc_line_idx(BMDDisplayMode mode)
157 for (i = 0; i < FF_ARRAY_ELEMS(vanc_line_numbers); i++) {
158 if (mode == vanc_line_numbers[i].mode)
161 /* Return the VANC idx for Unknown mode */
165 static inline void clear_parity_bits(uint16_t *buf, int len) {
167 for (i = 0; i < len; i++)
171 static int check_vanc_parity_checksum(uint16_t *buf, int len, uint16_t checksum) {
173 uint16_t vanc_sum = 0;
174 for (i = 3; i < len - 1; i++) {
177 int p = av_parity(v & 0xff);
178 if ((!!p ^ !!(v & 0x100)) || (np != 1 && np != 2)) {
179 // Parity check failed
185 vanc_sum |= ((~vanc_sum & 0x100) << 1);
186 if (checksum != vanc_sum) {
187 // Checksum verification failed
193 /* The 10-bit VANC data is packed in V210, we only need the luma component. */
194 static void extract_luma_from_v210(uint16_t *dst, const uint8_t *src, int width)
197 for (i = 0; i < width / 3; i++) {
198 *dst++ = (src[1] >> 2) + ((src[2] & 15) << 6);
199 *dst++ = src[4] + ((src[5] & 3) << 8);
200 *dst++ = (src[6] >> 4) + ((src[7] & 63) << 4);
205 static void unpack_v210(uint16_t *dst, const uint8_t *src, int width)
208 for (i = 0; i < width * 2 / 3; i++) {
209 *dst++ = src[0] + ((src[1] & 3) << 8);
210 *dst++ = (src[1] >> 2) + ((src[2] & 15) << 6);
211 *dst++ = (src[2] >> 4) + ((src[3] & 63) << 4);
216 static uint8_t calc_parity_and_line_offset(int line)
218 uint8_t ret = (line < 313) << 5;
219 if (line >= 7 && line <= 22)
221 if (line >= 320 && line <= 335)
226 static void fill_data_unit_head(int line, uint8_t *tgt)
228 tgt[0] = 0x02; // data_unit_id
229 tgt[1] = 0x2c; // data_unit_length
230 tgt[2] = calc_parity_and_line_offset(line); // field_parity, line_offset
231 tgt[3] = 0xe4; // framing code
235 static uint8_t* teletext_data_unit_from_vbi_data(int line, uint8_t *src, uint8_t *tgt, vbi_pixfmt fmt)
237 vbi_bit_slicer slicer;
239 vbi_bit_slicer_init(&slicer, 720, 13500000, 6937500, 6937500, 0x00aaaae4, 0xffff, 18, 6, 42 * 8, VBI_MODULATION_NRZ_MSB, fmt);
241 if (vbi_bit_slice(&slicer, src, tgt + 4) == FALSE)
244 fill_data_unit_head(line, tgt);
249 static uint8_t* teletext_data_unit_from_vbi_data_10bit(int line, uint8_t *src, uint8_t *tgt)
253 uint8_t *pend = y + 720;
254 /* The 10-bit VBI data is packed in V210, but libzvbi only supports 8-bit,
255 * so we extract the 8 MSBs of the luma component, that is enough for
256 * teletext bit slicing. */
258 *py++ = (src[1] >> 4) + ((src[2] & 15) << 4);
259 *py++ = (src[4] >> 2) + ((src[5] & 3 ) << 6);
260 *py++ = (src[6] >> 6) + ((src[7] & 63) << 2);
263 return teletext_data_unit_from_vbi_data(line, y, tgt, VBI_PIXFMT_YUV420);
267 static uint8_t* teletext_data_unit_from_op47_vbi_packet(int line, uint16_t *py, uint8_t *tgt)
271 if (py[0] != 0x255 || py[1] != 0x255 || py[2] != 0x227)
274 fill_data_unit_head(line, tgt);
279 for (i = 0; i < 42; i++)
280 *tgt++ = ff_reverse[py[i] & 255];
285 static int linemask_matches(int line, int64_t mask)
288 if (line >= 6 && line <= 22)
290 if (line >= 318 && line <= 335)
291 shift = line - 318 + 17;
292 return shift >= 0 && ((1ULL << shift) & mask);
295 static uint8_t* teletext_data_unit_from_op47_data(uint16_t *py, uint16_t *pend, uint8_t *tgt, int64_t wanted_lines)
298 if (py[0] == 0x151 && py[1] == 0x115 && py[3] == 0x102) { // identifier, identifier, format code for WST teletext
299 uint16_t *descriptors = py + 4;
302 for (i = 0; i < 5 && py < pend - 45; i++, py += 45) {
303 int line = (descriptors[i] & 31) + (!(descriptors[i] & 128)) * 313;
304 if (line && linemask_matches(line, wanted_lines))
305 tgt = teletext_data_unit_from_op47_vbi_packet(line, py, tgt);
312 static uint8_t* teletext_data_unit_from_ancillary_packet(uint16_t *py, uint16_t *pend, uint8_t *tgt, int64_t wanted_lines, int allow_multipacket)
314 uint16_t did = py[0]; // data id
315 uint16_t sdid = py[1]; // secondary data id
316 uint16_t dc = py[2] & 255; // data count
318 pend = FFMIN(pend, py + dc);
319 if (did == 0x143 && sdid == 0x102) { // subtitle distribution packet
320 tgt = teletext_data_unit_from_op47_data(py, pend, tgt, wanted_lines);
321 } else if (allow_multipacket && did == 0x143 && sdid == 0x203) { // VANC multipacket
322 py += 2; // priority, line/field
323 while (py < pend - 3) {
324 tgt = teletext_data_unit_from_ancillary_packet(py, pend, tgt, wanted_lines, 0);
325 py += 4 + (py[2] & 255); // ndid, nsdid, ndc, line/field
331 static uint8_t *vanc_to_cc(AVFormatContext *avctx, uint16_t *buf, size_t words,
334 size_t i, len = (buf[5] & 0xff) + 6 + 1;
335 uint8_t cdp_sum, rate;
338 uint16_t *cdp = &buf[6]; // CDP follows
339 if (cdp[0] != 0x96 || cdp[1] != 0x69) {
340 av_log(avctx, AV_LOG_WARNING, "Invalid CDP header 0x%.2x 0x%.2x\n", cdp[0], cdp[1]);
344 len -= 7; // remove VANC header and checksum
347 av_log(avctx, AV_LOG_WARNING, "CDP len %d != %zu\n", cdp[2], len);
352 for (i = 0; i < len - 1; i++)
354 cdp_sum = cdp_sum ? 256 - cdp_sum : 0;
355 if (cdp[len - 1] != cdp_sum) {
356 av_log(avctx, AV_LOG_WARNING, "CDP checksum invalid 0x%.4x != 0x%.4x\n", cdp_sum, cdp[len-1]);
361 if (!(rate & 0x0f)) {
362 av_log(avctx, AV_LOG_WARNING, "CDP frame rate invalid (0x%.2x)\n", rate);
367 av_log(avctx, AV_LOG_WARNING, "CDP frame rate invalid (0x%.2x)\n", rate);
371 if (!(cdp[4] & 0x43)) /* ccdata_present | caption_service_active | reserved */ {
372 av_log(avctx, AV_LOG_WARNING, "CDP flags invalid (0x%.2x)\n", cdp[4]);
376 hdr = (cdp[5] << 8) | cdp[6];
377 if (cdp[7] != 0x72) /* ccdata_id */ {
378 av_log(avctx, AV_LOG_WARNING, "Invalid ccdata_id 0x%.2x\n", cdp[7]);
383 if (!(cc_count & 0xe0)) {
384 av_log(avctx, AV_LOG_WARNING, "Invalid cc_count 0x%.2x\n", cc_count);
389 if ((len - 13) < cc_count * 3) {
390 av_log(avctx, AV_LOG_WARNING, "Invalid cc_count %d (> %zu)\n", cc_count * 3, len - 13);
394 if (cdp[len - 4] != 0x74) /* footer id */ {
395 av_log(avctx, AV_LOG_WARNING, "Invalid footer id 0x%.2x\n", cdp[len-4]);
399 ftr = (cdp[len - 3] << 8) | cdp[len - 2];
401 av_log(avctx, AV_LOG_WARNING, "Header 0x%.4x != Footer 0x%.4x\n", hdr, ftr);
405 cc = (uint8_t *)av_malloc(cc_count * 3);
407 av_log(avctx, AV_LOG_WARNING, "CC - av_malloc failed for cc_count = %d\n", cc_count);
411 for (size_t i = 0; i < cc_count; i++) {
412 cc[3*i + 0] = cdp[9 + 3*i+0] /* & 3 */;
413 cc[3*i + 1] = cdp[9 + 3*i+1];
414 cc[3*i + 2] = cdp[9 + 3*i+2];
421 static uint8_t *get_metadata(AVFormatContext *avctx, uint16_t *buf, size_t width,
422 uint8_t *tgt, size_t tgt_size, AVPacket *pkt)
424 decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
425 uint16_t *max_buf = buf + width;
427 while (buf < max_buf - 6) {
429 uint16_t did = buf[3] & 0xFF; // data id
430 uint16_t sdid = buf[4] & 0xFF; // secondary data id
431 /* Check for VANC header */
432 if (buf[0] != 0 || buf[1] != 0x3ff || buf[2] != 0x3ff) {
436 len = (buf[5] & 0xff) + 6 + 1;
437 if (len > max_buf - buf) {
438 av_log(avctx, AV_LOG_WARNING, "Data Count (%d) > data left (%zu)\n",
443 if (did == 0x43 && (sdid == 0x02 || sdid == 0x03) && cctx->teletext_lines &&
444 width == 1920 && tgt_size >= 1920) {
445 if (check_vanc_parity_checksum(buf, len, buf[len - 1]) < 0) {
446 av_log(avctx, AV_LOG_WARNING, "VANC parity or checksum incorrect\n");
449 tgt = teletext_data_unit_from_ancillary_packet(buf + 3, buf + len, tgt, cctx->teletext_lines, 1);
450 } else if (did == 0x61 && sdid == 0x01) {
451 unsigned int data_len;
453 if (check_vanc_parity_checksum(buf, len, buf[len - 1]) < 0) {
454 av_log(avctx, AV_LOG_WARNING, "VANC parity or checksum incorrect\n");
457 clear_parity_bits(buf, len);
458 data = vanc_to_cc(avctx, buf, width, data_len);
460 if (av_packet_add_side_data(pkt, AV_PKT_DATA_A53_CC, data, data_len) < 0)
464 av_log(avctx, AV_LOG_DEBUG, "Unknown meta data DID = 0x%.2x SDID = 0x%.2x\n",
474 static void avpacket_queue_init(AVFormatContext *avctx, AVPacketQueue *q)
476 struct decklink_cctx *ctx = (struct decklink_cctx *)avctx->priv_data;
477 memset(q, 0, sizeof(AVPacketQueue));
478 pthread_mutex_init(&q->mutex, NULL);
479 pthread_cond_init(&q->cond, NULL);
481 q->max_q_size = ctx->queue_size;
484 static void avpacket_queue_flush(AVPacketQueue *q)
486 PacketList *pkt, *pkt1;
488 pthread_mutex_lock(&q->mutex);
489 for (pkt = q->first_pkt; pkt != NULL; pkt = pkt1) {
491 av_packet_unref(&pkt->pkt);
498 pthread_mutex_unlock(&q->mutex);
501 static void avpacket_queue_end(AVPacketQueue *q)
503 avpacket_queue_flush(q);
504 pthread_mutex_destroy(&q->mutex);
505 pthread_cond_destroy(&q->cond);
508 static unsigned long long avpacket_queue_size(AVPacketQueue *q)
510 unsigned long long size;
511 pthread_mutex_lock(&q->mutex);
513 pthread_mutex_unlock(&q->mutex);
517 static int avpacket_queue_put(AVPacketQueue *q, AVPacket *pkt)
521 // Drop Packet if queue size is > maximum queue size
522 if (avpacket_queue_size(q) > (uint64_t)q->max_q_size) {
523 av_packet_unref(pkt);
524 av_log(q->avctx, AV_LOG_WARNING, "Decklink input buffer overrun!\n");
527 /* ensure the packet is reference counted */
528 if (av_packet_make_refcounted(pkt) < 0) {
529 av_packet_unref(pkt);
533 pkt1 = (PacketList *)av_malloc(sizeof(PacketList));
535 av_packet_unref(pkt);
538 av_packet_move_ref(&pkt1->pkt, pkt);
541 pthread_mutex_lock(&q->mutex);
546 q->last_pkt->next = pkt1;
551 q->size += pkt1->pkt.size + sizeof(*pkt1);
553 pthread_cond_signal(&q->cond);
555 pthread_mutex_unlock(&q->mutex);
559 static int avpacket_queue_get(AVPacketQueue *q, AVPacket *pkt, int block)
564 pthread_mutex_lock(&q->mutex);
569 q->first_pkt = pkt1->next;
574 q->size -= pkt1->pkt.size + sizeof(*pkt1);
583 pthread_cond_wait(&q->cond, &q->mutex);
586 pthread_mutex_unlock(&q->mutex);
590 static void handle_klv(AVFormatContext *avctx, decklink_ctx *ctx, IDeckLinkVideoInputFrame *videoFrame, int64_t pts)
592 const uint8_t KLV_DID = 0x44;
593 const uint8_t KLV_IN_VANC_SDID = 0x04;
597 uint16_t sequence_counter;
598 std::vector<uint8_t> data;
601 size_t total_size = 0;
602 std::vector<std::vector<KLVPacket>> klv_packets(256);
604 IDeckLinkVideoFrameAncillaryPackets *packets = nullptr;
605 if (videoFrame->QueryInterface(IID_IDeckLinkVideoFrameAncillaryPackets, (void**)&packets) != S_OK)
608 IDeckLinkAncillaryPacketIterator *it = nullptr;
609 if (packets->GetPacketIterator(&it) != S_OK) {
614 IDeckLinkAncillaryPacket *packet = nullptr;
615 while (it->Next(&packet) == S_OK) {
616 uint8_t *data = nullptr;
619 if (packet->GetDID() == KLV_DID && packet->GetSDID() == KLV_IN_VANC_SDID) {
620 av_log(avctx, AV_LOG_DEBUG, "Found KLV VANC packet on line: %d\n", packet->GetLineNumber());
622 if (packet->GetBytes(bmdAncillaryPacketFormatUInt8, (const void**) &data, &size) == S_OK) {
625 uint8_t mid = data[0];
626 uint16_t psc = data[1] << 8 | data[2];
628 av_log(avctx, AV_LOG_DEBUG, "KLV with MID: %d and PSC: %d\n", mid, psc);
630 auto& list = klv_packets[mid];
631 uint16_t expected_psc = list.size() + 1;
633 if (psc == expected_psc) {
634 uint32_t data_len = size - 3;
635 total_size += data_len;
637 KLVPacket packet{ psc };
638 packet.data.resize(data_len);
639 memcpy(packet.data.data(), data + 3, data_len);
641 list.push_back(std::move(packet));
643 av_log(avctx, AV_LOG_WARNING, "Out of order PSC: %d for MID: %d\n", psc, mid);
646 for (auto& klv : list)
647 total_size -= klv.data.size();
662 if (total_size > 0) {
663 std::vector<uint8_t> klv;
664 klv.reserve(total_size);
666 for (size_t i = 0; i < klv_packets.size(); ++i) {
667 auto& list = klv_packets[i];
672 av_log(avctx, AV_LOG_DEBUG, "Joining MID: %d\n", (int)i);
674 for (auto& packet : list)
675 klv.insert(klv.end(), packet.data.begin(), packet.data.end());
678 AVPacket klv_packet = { 0 };
679 klv_packet.pts = pts;
680 klv_packet.dts = pts;
681 klv_packet.flags |= AV_PKT_FLAG_KEY;
682 klv_packet.stream_index = ctx->klv_st->index;
683 klv_packet.data = klv.data();
684 klv_packet.size = klv.size();
686 if (avpacket_queue_put(&ctx->queue, &klv_packet) < 0) {
692 class decklink_input_callback : public IDeckLinkInputCallback
695 decklink_input_callback(AVFormatContext *_avctx);
696 ~decklink_input_callback();
698 virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; }
699 virtual ULONG STDMETHODCALLTYPE AddRef(void);
700 virtual ULONG STDMETHODCALLTYPE Release(void);
701 virtual HRESULT STDMETHODCALLTYPE VideoInputFormatChanged(BMDVideoInputFormatChangedEvents, IDeckLinkDisplayMode*, BMDDetectedVideoInputFormatFlags);
702 virtual HRESULT STDMETHODCALLTYPE VideoInputFrameArrived(IDeckLinkVideoInputFrame*, IDeckLinkAudioInputPacket*);
705 std::atomic<int> _refs;
706 AVFormatContext *avctx;
709 int64_t initial_video_pts;
710 int64_t initial_audio_pts;
713 decklink_input_callback::decklink_input_callback(AVFormatContext *_avctx) : _refs(1)
716 decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
717 ctx = (struct decklink_ctx *)cctx->ctx;
719 initial_audio_pts = initial_video_pts = AV_NOPTS_VALUE;
722 decklink_input_callback::~decklink_input_callback()
726 ULONG decklink_input_callback::AddRef(void)
731 ULONG decklink_input_callback::Release(void)
739 static int64_t get_pkt_pts(IDeckLinkVideoInputFrame *videoFrame,
740 IDeckLinkAudioInputPacket *audioFrame,
742 int64_t abs_wallclock,
743 DecklinkPtsSource pts_src,
744 AVRational time_base, int64_t *initial_pts,
747 int64_t pts = AV_NOPTS_VALUE;
748 BMDTimeValue bmd_pts;
749 BMDTimeValue bmd_duration;
750 HRESULT res = E_INVALIDARG;
754 res = audioFrame->GetPacketTime(&bmd_pts, time_base.den);
758 res = videoFrame->GetStreamTime(&bmd_pts, &bmd_duration, time_base.den);
760 case PTS_SRC_REFERENCE:
762 res = videoFrame->GetHardwareReferenceTimestamp(time_base.den, &bmd_pts, &bmd_duration);
764 case PTS_SRC_WALLCLOCK:
766 case PTS_SRC_ABS_WALLCLOCK:
768 /* MSVC does not support compound literals like AV_TIME_BASE_Q
769 * in C++ code (compiler error C4576) */
772 timebase.den = AV_TIME_BASE;
773 if (pts_src == PTS_SRC_WALLCLOCK)
774 pts = av_rescale_q(wallclock, timebase, time_base);
776 pts = av_rescale_q(abs_wallclock, timebase, time_base);
781 pts = bmd_pts / time_base.num;
784 if (pts != AV_NOPTS_VALUE && *initial_pts == AV_NOPTS_VALUE)
786 if (*initial_pts != AV_NOPTS_VALUE)
793 static int get_bmd_timecode(AVFormatContext *avctx, AVTimecode *tc, AVRational frame_rate, BMDTimecodeFormat tc_format, IDeckLinkVideoInputFrame *videoFrame)
795 IDeckLinkTimecode *timecode;
796 int ret = AVERROR(ENOENT);
797 #if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000
798 int hfr = (tc_format == bmdTimecodeRP188HighFrameRate);
802 if (videoFrame->GetTimecode(tc_format, &timecode) == S_OK) {
803 uint8_t hh, mm, ss, ff;
804 if (timecode->GetComponents(&hh, &mm, &ss, &ff) == S_OK) {
805 int flags = (timecode->GetFlags() & bmdTimecodeIsDropFrame) ? AV_TIMECODE_FLAG_DROPFRAME : 0;
806 if (!hfr && av_cmp_q(frame_rate, av_make_q(30, 1)) == 1)
807 ff = ff << 1 | !!(timecode->GetFlags() & bmdTimecodeFieldMark);
808 ret = av_timecode_init_from_components(tc, frame_rate, flags, hh, mm, ss, ff, avctx);
815 static int get_frame_timecode(AVFormatContext *avctx, decklink_ctx *ctx, AVTimecode *tc, IDeckLinkVideoInputFrame *videoFrame)
817 AVRational frame_rate = ctx->video_st->r_frame_rate;
819 /* 50/60 fps content has alternating VITC1 and VITC2 timecode (see SMPTE ST
820 * 12-2, section 7), so the native ordering of RP188Any (HFR, VITC1, LTC,
821 * VITC2) would not work because LTC might not contain the field flag.
822 * Therefore we query the types manually. */
823 if (ctx->tc_format == bmdTimecodeRP188Any && av_cmp_q(frame_rate, av_make_q(30, 1)) == 1) {
824 #if BLACKMAGIC_DECKLINK_API_VERSION >= 0x0b000000
825 ret = get_bmd_timecode(avctx, tc, frame_rate, bmdTimecodeRP188HighFrameRate, videoFrame);
826 if (ret == AVERROR(ENOENT))
828 ret = get_bmd_timecode(avctx, tc, frame_rate, bmdTimecodeRP188VITC1, videoFrame);
829 if (ret == AVERROR(ENOENT))
830 ret = get_bmd_timecode(avctx, tc, frame_rate, bmdTimecodeRP188VITC2, videoFrame);
831 if (ret == AVERROR(ENOENT))
832 ret = get_bmd_timecode(avctx, tc, frame_rate, bmdTimecodeRP188LTC, videoFrame);
834 ret = get_bmd_timecode(avctx, tc, frame_rate, ctx->tc_format, videoFrame);
839 HRESULT decklink_input_callback::VideoInputFrameArrived(
840 IDeckLinkVideoInputFrame *videoFrame, IDeckLinkAudioInputPacket *audioFrame)
843 void *audioFrameBytes;
844 BMDTimeValue frameTime;
845 BMDTimeValue frameDuration;
846 int64_t wallclock = 0, abs_wallclock = 0;
847 struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
849 if (ctx->autodetect) {
850 if (videoFrame && !(videoFrame->GetFlags() & bmdFrameHasNoInputSource) &&
851 ctx->bmd_mode == bmdModeUnknown)
853 ctx->bmd_mode = AUTODETECT_DEFAULT_MODE;
858 // Drop the frames till system's timestamp aligns with the configured value.
859 if (0 == ctx->frameCount && cctx->timestamp_align) {
860 AVRational remainder = av_make_q(av_gettime() % cctx->timestamp_align, 1000000);
861 AVRational frame_duration = av_inv_q(ctx->video_st->r_frame_rate);
862 if (av_cmp_q(remainder, frame_duration) > 0) {
869 if (ctx->audio_pts_source == PTS_SRC_WALLCLOCK || ctx->video_pts_source == PTS_SRC_WALLCLOCK)
870 wallclock = av_gettime_relative();
871 if (ctx->audio_pts_source == PTS_SRC_ABS_WALLCLOCK || ctx->video_pts_source == PTS_SRC_ABS_WALLCLOCK)
872 abs_wallclock = av_gettime();
874 // Handle Video Frame
876 AVPacket pkt = { 0 };
877 if (ctx->frameCount % 25 == 0) {
878 unsigned long long qsize = avpacket_queue_size(&ctx->queue);
879 av_log(avctx, AV_LOG_DEBUG,
880 "Frame received (#%lu) - Valid (%liB) - QSize %fMB\n",
882 videoFrame->GetRowBytes() * videoFrame->GetHeight(),
883 (double)qsize / 1024 / 1024);
886 videoFrame->GetBytes(&frameBytes);
887 videoFrame->GetStreamTime(&frameTime, &frameDuration,
888 ctx->video_st->time_base.den);
890 if (videoFrame->GetFlags() & bmdFrameHasNoInputSource) {
891 if (ctx->draw_bars && videoFrame->GetPixelFormat() == bmdFormat8BitYUV) {
893 0xEA80EA80, 0xD292D210, 0xA910A9A5, 0x90229035,
894 0x6ADD6ACA, 0x51EF515A, 0x286D28EF, 0x10801080 };
895 int width = videoFrame->GetWidth();
896 int height = videoFrame->GetHeight();
897 unsigned *p = (unsigned *)frameBytes;
899 for (int y = 0; y < height; y++) {
900 for (int x = 0; x < width; x += 2)
901 *p++ = bars[(x * 8) / width];
906 av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - No input signal detected "
907 "- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped);
912 av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - Input returned "
913 "- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped);
917 // Handle Timecode (if requested)
918 if (ctx->tc_format) {
920 if (get_frame_timecode(avctx, ctx, &tcr, videoFrame) >= 0) {
921 char tcstr[AV_TIMECODE_STR_SIZE];
922 const char *tc = av_timecode_make_string(&tcr, tcstr, 0);
924 AVDictionary* metadata_dict = NULL;
925 uint8_t* packed_metadata;
927 if (av_cmp_q(ctx->video_st->r_frame_rate, av_make_q(60, 1)) < 1) {
928 uint32_t tc_data = av_timecode_get_smpte_from_framenum(&tcr, 0);
929 int size = sizeof(uint32_t) * 4;
930 uint32_t *sd = (uint32_t *)av_packet_new_side_data(&pkt, AV_PKT_DATA_S12M_TIMECODE, size);
934 *(sd + 1) = tc_data; // TC
938 if (av_dict_set(&metadata_dict, "timecode", tc, 0) >= 0) {
940 packed_metadata = av_packet_pack_dictionary(metadata_dict, &metadata_len);
941 av_dict_free(&metadata_dict);
942 if (packed_metadata) {
943 if (av_packet_add_side_data(&pkt, AV_PKT_DATA_STRINGS_METADATA, packed_metadata, metadata_len) < 0)
944 av_freep(&packed_metadata);
945 else if (!ctx->tc_seen)
946 ctx->tc_seen = ctx->frameCount;
951 av_log(avctx, AV_LOG_DEBUG, "Unable to find timecode.\n");
956 if (ctx->tc_format && cctx->wait_for_tc && !ctx->tc_seen) {
958 av_log(avctx, AV_LOG_WARNING, "No TC detected yet. wait_for_tc set. Dropping. \n");
959 av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - "
960 "- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped);
964 pkt.pts = get_pkt_pts(videoFrame, audioFrame, wallclock, abs_wallclock, ctx->video_pts_source, ctx->video_st->time_base, &initial_video_pts, cctx->copyts);
967 pkt.duration = frameDuration;
968 //To be made sure it still applies
969 pkt.flags |= AV_PKT_FLAG_KEY;
970 pkt.stream_index = ctx->video_st->index;
971 pkt.data = (uint8_t *)frameBytes;
972 pkt.size = videoFrame->GetRowBytes() *
973 videoFrame->GetHeight();
974 //fprintf(stderr,"Video Frame size %d ts %d\n", pkt.size, pkt.pts);
977 IDeckLinkVideoFrameAncillary *vanc;
978 AVPacket txt_pkt = { 0 };
979 uint8_t txt_buf0[3531]; // 35 * 46 bytes decoded teletext lines + 1 byte data_identifier + 1920 bytes OP47 decode buffer
980 uint8_t *txt_buf = txt_buf0;
982 if (ctx->enable_klv) {
983 handle_klv(avctx, ctx, videoFrame, pkt.pts);
986 if (videoFrame->GetAncillaryData(&vanc) == S_OK) {
988 BMDPixelFormat vanc_format = vanc->GetPixelFormat();
989 txt_buf[0] = 0x10; // data_identifier - EBU_data
992 if (ctx->bmd_mode == bmdModePAL && ctx->teletext_lines &&
993 (vanc_format == bmdFormat8BitYUV || vanc_format == bmdFormat10BitYUV)) {
994 int64_t line_mask = 1;
995 av_assert0(videoFrame->GetWidth() == 720);
996 for (i = 6; i < 336; i++, line_mask <<= 1) {
998 if ((ctx->teletext_lines & line_mask) && vanc->GetBufferForVerticalBlankingLine(i, (void**)&buf) == S_OK) {
999 if (vanc_format == bmdFormat8BitYUV)
1000 txt_buf = teletext_data_unit_from_vbi_data(i, buf, txt_buf, VBI_PIXFMT_UYVY);
1002 txt_buf = teletext_data_unit_from_vbi_data_10bit(i, buf, txt_buf);
1009 if (vanc_format == bmdFormat10BitYUV && videoFrame->GetWidth() <= MAX_WIDTH_VANC) {
1010 int idx = get_vanc_line_idx(ctx->bmd_mode);
1011 for (i = vanc_line_numbers[idx].vanc_start; i <= vanc_line_numbers[idx].vanc_end; i++) {
1013 if (vanc->GetBufferForVerticalBlankingLine(i, (void**)&buf) == S_OK) {
1014 uint16_t vanc[MAX_WIDTH_VANC];
1015 size_t vanc_size = videoFrame->GetWidth();
1016 if (ctx->bmd_mode == bmdModeNTSC && videoFrame->GetWidth() * 2 <= MAX_WIDTH_VANC) {
1017 vanc_size = vanc_size * 2;
1018 unpack_v210(vanc, buf, videoFrame->GetWidth());
1020 extract_luma_from_v210(vanc, buf, videoFrame->GetWidth());
1022 txt_buf = get_metadata(avctx, vanc, vanc_size,
1023 txt_buf, sizeof(txt_buf0) - (txt_buf - txt_buf0), &pkt);
1025 if (i == vanc_line_numbers[idx].field0_vanc_end)
1026 i = vanc_line_numbers[idx].field1_vanc_start - 1;
1030 if (txt_buf - txt_buf0 > 1) {
1031 int stuffing_units = (4 - ((45 + txt_buf - txt_buf0) / 46) % 4) % 4;
1032 while (stuffing_units--) {
1033 memset(txt_buf, 0xff, 46);
1034 txt_buf[1] = 0x2c; // data_unit_length
1037 txt_pkt.pts = pkt.pts;
1038 txt_pkt.dts = pkt.dts;
1039 txt_pkt.stream_index = ctx->teletext_st->index;
1040 txt_pkt.data = txt_buf0;
1041 txt_pkt.size = txt_buf - txt_buf0;
1042 if (avpacket_queue_put(&ctx->queue, &txt_pkt) < 0) {
1049 pkt.buf = av_buffer_create(pkt.data, pkt.size, decklink_object_free, videoFrame, 0);
1051 videoFrame->AddRef();
1053 if (avpacket_queue_put(&ctx->queue, &pkt) < 0) {
1058 // Handle Audio Frame
1060 AVPacket pkt = { 0 };
1061 BMDTimeValue audio_pts;
1064 pkt.size = audioFrame->GetSampleFrameCount() * ctx->audio_st->codecpar->channels * (ctx->audio_depth / 8);
1065 audioFrame->GetBytes(&audioFrameBytes);
1066 audioFrame->GetPacketTime(&audio_pts, ctx->audio_st->time_base.den);
1067 pkt.pts = get_pkt_pts(videoFrame, audioFrame, wallclock, abs_wallclock, ctx->audio_pts_source, ctx->audio_st->time_base, &initial_audio_pts, cctx->copyts);
1070 //fprintf(stderr,"Audio Frame size %d ts %d\n", pkt.size, pkt.pts);
1071 pkt.flags |= AV_PKT_FLAG_KEY;
1072 pkt.stream_index = ctx->audio_st->index;
1073 pkt.data = (uint8_t *)audioFrameBytes;
1075 if (avpacket_queue_put(&ctx->queue, &pkt) < 0) {
1083 HRESULT decklink_input_callback::VideoInputFormatChanged(
1084 BMDVideoInputFormatChangedEvents events, IDeckLinkDisplayMode *mode,
1085 BMDDetectedVideoInputFormatFlags formatFlags)
1087 struct decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
1088 ctx->bmd_mode = mode->GetDisplayMode();
1089 // check the C context member to make sure we set both raw_format and bmd_mode with data from the same format change callback
1090 if (!cctx->raw_format)
1091 ctx->raw_format = (formatFlags & bmdDetectedVideoInputRGB444) ? bmdFormat8BitARGB : bmdFormat8BitYUV;
1095 static int decklink_autodetect(struct decklink_cctx *cctx) {
1096 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
1097 DECKLINK_BOOL autodetect_supported = false;
1100 if (ctx->attr->GetFlag(BMDDeckLinkSupportsInputFormatDetection, &autodetect_supported) != S_OK)
1102 if (autodetect_supported == false)
1105 ctx->autodetect = 1;
1106 ctx->bmd_mode = bmdModeUnknown;
1107 if (ctx->dli->EnableVideoInput(AUTODETECT_DEFAULT_MODE,
1109 bmdVideoInputEnableFormatDetection) != S_OK) {
1113 if (ctx->dli->StartStreams() != S_OK) {
1118 for (i = 0; i < 30; i++) {
1120 /* Sometimes VideoInputFrameArrived is called without the
1121 * bmdFrameHasNoInputSource flag before VideoInputFormatChanged.
1122 * So don't break for bmd_mode == AUTODETECT_DEFAULT_MODE. */
1123 if (ctx->bmd_mode != bmdModeUnknown &&
1124 ctx->bmd_mode != AUTODETECT_DEFAULT_MODE)
1128 ctx->dli->PauseStreams();
1129 ctx->dli->FlushStreams();
1130 ctx->autodetect = 0;
1131 if (ctx->bmd_mode != bmdModeUnknown) {
1132 cctx->format_code = (char *)av_mallocz(5);
1133 if (!cctx->format_code)
1135 AV_WB32(cctx->format_code, ctx->bmd_mode);
1145 av_cold int ff_decklink_read_close(AVFormatContext *avctx)
1147 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
1148 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
1151 ctx->dli->StopStreams();
1152 ctx->dli->DisableVideoInput();
1153 ctx->dli->DisableAudioInput();
1156 ff_decklink_cleanup(avctx);
1157 avpacket_queue_end(&ctx->queue);
1159 av_freep(&cctx->ctx);
1164 av_cold int ff_decklink_read_header(AVFormatContext *avctx)
1166 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
1167 struct decklink_ctx *ctx;
1168 class decklink_allocator *allocator;
1169 class decklink_input_callback *input_callback;
1174 ctx = (struct decklink_ctx *) av_mallocz(sizeof(struct decklink_ctx));
1176 return AVERROR(ENOMEM);
1177 ctx->list_devices = cctx->list_devices;
1178 ctx->list_formats = cctx->list_formats;
1179 ctx->enable_klv = cctx->enable_klv;
1180 ctx->teletext_lines = cctx->teletext_lines;
1181 ctx->preroll = cctx->preroll;
1182 ctx->duplex_mode = cctx->duplex_mode;
1183 if (cctx->tc_format > 0 && (unsigned int)cctx->tc_format < FF_ARRAY_ELEMS(decklink_timecode_format_map))
1184 ctx->tc_format = decklink_timecode_format_map[cctx->tc_format];
1185 if (cctx->video_input > 0 && (unsigned int)cctx->video_input < FF_ARRAY_ELEMS(decklink_video_connection_map))
1186 ctx->video_input = decklink_video_connection_map[cctx->video_input];
1187 if (cctx->audio_input > 0 && (unsigned int)cctx->audio_input < FF_ARRAY_ELEMS(decklink_audio_connection_map))
1188 ctx->audio_input = decklink_audio_connection_map[cctx->audio_input];
1189 ctx->audio_pts_source = cctx->audio_pts_source;
1190 ctx->video_pts_source = cctx->video_pts_source;
1191 ctx->draw_bars = cctx->draw_bars;
1192 ctx->audio_depth = cctx->audio_depth;
1193 if (cctx->raw_format > 0 && (unsigned int)cctx->raw_format < FF_ARRAY_ELEMS(decklink_raw_format_map))
1194 ctx->raw_format = decklink_raw_format_map[cctx->raw_format];
1197 /* Check audio channel option for valid values: 2, 8 or 16 */
1198 switch (cctx->audio_channels) {
1204 av_log(avctx, AV_LOG_ERROR, "Value of channels option must be one of 2, 8 or 16\n");
1205 return AVERROR(EINVAL);
1208 /* Check audio bit depth option for valid values: 16 or 32 */
1209 switch (cctx->audio_depth) {
1214 av_log(avctx, AV_LOG_ERROR, "Value for audio bit depth option must be either 16 or 32\n");
1215 return AVERROR(EINVAL);
1218 /* List available devices. */
1219 if (ctx->list_devices) {
1220 ff_decklink_list_devices_legacy(avctx, 1, 0);
1221 return AVERROR_EXIT;
1224 ret = ff_decklink_init_device(avctx, avctx->url);
1228 /* Get input device. */
1229 if (ctx->dl->QueryInterface(IID_IDeckLinkInput, (void **) &ctx->dli) != S_OK) {
1230 av_log(avctx, AV_LOG_ERROR, "Could not open input device from '%s'\n",
1236 if (ff_decklink_set_configs(avctx, DIRECTION_IN) < 0) {
1237 av_log(avctx, AV_LOG_ERROR, "Could not set input configuration\n");
1242 /* List supported formats. */
1243 if (ctx->list_formats) {
1244 ff_decklink_list_formats(avctx, DIRECTION_IN);
1249 input_callback = new decklink_input_callback(avctx);
1250 ret = (ctx->dli->SetCallback(input_callback) == S_OK ? 0 : AVERROR_EXTERNAL);
1251 input_callback->Release();
1253 av_log(avctx, AV_LOG_ERROR, "Cannot set input callback\n");
1257 allocator = new decklink_allocator();
1258 ret = (ctx->dli->SetVideoInputFrameMemoryAllocator(allocator) == S_OK ? 0 : AVERROR_EXTERNAL);
1259 allocator->Release();
1261 av_log(avctx, AV_LOG_ERROR, "Cannot set custom memory allocator\n");
1265 if (!cctx->format_code) {
1266 if (decklink_autodetect(cctx) < 0) {
1267 av_log(avctx, AV_LOG_ERROR, "Cannot Autodetect input stream or No signal\n");
1271 av_log(avctx, AV_LOG_INFO, "Autodetected the input mode\n");
1273 if (ctx->raw_format == (BMDPixelFormat)0)
1274 ctx->raw_format = bmdFormat8BitYUV;
1275 if (ff_decklink_set_format(avctx, DIRECTION_IN) < 0) {
1276 av_log(avctx, AV_LOG_ERROR, "Could not set format code %s for %s\n",
1277 cctx->format_code ? cctx->format_code : "(unset)", avctx->url);
1283 if (ctx->teletext_lines && ctx->bmd_mode == bmdModePAL) {
1284 av_log(avctx, AV_LOG_ERROR, "Libzvbi support is needed for capturing SD PAL teletext, please recompile FFmpeg.\n");
1285 ret = AVERROR(ENOSYS);
1290 /* Setup streams. */
1291 st = avformat_new_stream(avctx, NULL);
1293 av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n");
1294 ret = AVERROR(ENOMEM);
1297 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1298 st->codecpar->codec_id = cctx->audio_depth == 32 ? AV_CODEC_ID_PCM_S32LE : AV_CODEC_ID_PCM_S16LE;
1299 st->codecpar->sample_rate = bmdAudioSampleRate48kHz;
1300 st->codecpar->channels = cctx->audio_channels;
1301 avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
1304 st = avformat_new_stream(avctx, NULL);
1306 av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n");
1307 ret = AVERROR(ENOMEM);
1310 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
1311 st->codecpar->width = ctx->bmd_width;
1312 st->codecpar->height = ctx->bmd_height;
1314 st->time_base.den = ctx->bmd_tb_den;
1315 st->time_base.num = ctx->bmd_tb_num;
1316 st->r_frame_rate = av_make_q(st->time_base.den, st->time_base.num);
1318 switch(ctx->raw_format) {
1319 case bmdFormat8BitYUV:
1320 st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
1321 st->codecpar->format = AV_PIX_FMT_UYVY422;
1322 st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 16, st->time_base.den, st->time_base.num);
1324 case bmdFormat10BitYUV:
1325 st->codecpar->codec_id = AV_CODEC_ID_V210;
1326 st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 64, st->time_base.den, st->time_base.num * 3);
1328 case bmdFormat8BitARGB:
1329 st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
1330 st->codecpar->format = AV_PIX_FMT_0RGB;
1331 st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 32, st->time_base.den, st->time_base.num);
1333 case bmdFormat8BitBGRA:
1334 st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
1335 st->codecpar->format = AV_PIX_FMT_BGR0;
1336 st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 32, st->time_base.den, st->time_base.num);
1338 case bmdFormat10BitRGB:
1339 st->codecpar->codec_id = AV_CODEC_ID_R210;
1340 st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 30, st->time_base.den, st->time_base.num);
1343 char fourcc_str[AV_FOURCC_MAX_STRING_SIZE] = {0};
1344 av_fourcc_make_string(fourcc_str, ctx->raw_format);
1345 av_log(avctx, AV_LOG_ERROR, "Raw Format %s not supported\n", fourcc_str);
1346 ret = AVERROR(EINVAL);
1350 switch (ctx->bmd_field_dominance) {
1351 case bmdUpperFieldFirst:
1352 st->codecpar->field_order = AV_FIELD_TT;
1354 case bmdLowerFieldFirst:
1355 st->codecpar->field_order = AV_FIELD_BB;
1357 case bmdProgressiveFrame:
1358 case bmdProgressiveSegmentedFrame:
1359 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
1363 avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
1367 if (ctx->enable_klv) {
1368 st = avformat_new_stream(avctx, NULL);
1370 ret = AVERROR(ENOMEM);
1373 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
1374 st->time_base.den = ctx->bmd_tb_den;
1375 st->time_base.num = ctx->bmd_tb_num;
1376 st->codecpar->codec_id = AV_CODEC_ID_SMPTE_KLV;
1377 avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
1381 if (ctx->teletext_lines) {
1382 st = avformat_new_stream(avctx, NULL);
1384 av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n");
1385 ret = AVERROR(ENOMEM);
1388 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
1389 st->time_base.den = ctx->bmd_tb_den;
1390 st->time_base.num = ctx->bmd_tb_num;
1391 st->codecpar->codec_id = AV_CODEC_ID_DVB_TELETEXT;
1392 avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
1393 ctx->teletext_st = st;
1396 av_log(avctx, AV_LOG_VERBOSE, "Using %d input audio channels\n", ctx->audio_st->codecpar->channels);
1397 result = ctx->dli->EnableAudioInput(bmdAudioSampleRate48kHz, cctx->audio_depth == 32 ? bmdAudioSampleType32bitInteger : bmdAudioSampleType16bitInteger, ctx->audio_st->codecpar->channels);
1399 if (result != S_OK) {
1400 av_log(avctx, AV_LOG_ERROR, "Cannot enable audio input\n");
1405 result = ctx->dli->EnableVideoInput(ctx->bmd_mode,
1407 bmdVideoInputFlagDefault);
1409 if (result != S_OK) {
1410 av_log(avctx, AV_LOG_ERROR, "Cannot enable video input\n");
1415 avpacket_queue_init (avctx, &ctx->queue);
1417 if (ctx->dli->StartStreams() != S_OK) {
1418 av_log(avctx, AV_LOG_ERROR, "Cannot start input stream\n");
1426 ff_decklink_cleanup(avctx);
1430 int ff_decklink_read_packet(AVFormatContext *avctx, AVPacket *pkt)
1432 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
1433 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
1435 avpacket_queue_get(&ctx->queue, pkt, 1);
1437 if (ctx->tc_format && !(av_dict_get(ctx->video_st->metadata, "timecode", NULL, 0))) {
1439 const uint8_t *side_metadata = av_packet_get_side_data(pkt, AV_PKT_DATA_STRINGS_METADATA, &size);
1440 if (side_metadata) {
1441 if (av_packet_unpack_dictionary(side_metadata, size, &ctx->video_st->metadata) < 0)
1442 av_log(avctx, AV_LOG_ERROR, "Unable to set timecode\n");
1449 int ff_decklink_list_input_devices(AVFormatContext *avctx, struct AVDeviceInfoList *device_list)
1451 return ff_decklink_list_devices(avctx, device_list, 1, 0);