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
24 /* Include internal.h first to avoid conflict between winsock.h (used by
25 * DeckLink headers) and winsock2.h (used by libavformat) in MSVC++ builds */
27 #include "libavformat/internal.h"
30 #include <DeckLinkAPI.h>
34 #include "libavformat/avformat.h"
35 #include "libavutil/avassert.h"
36 #include "libavutil/avutil.h"
37 #include "libavutil/common.h"
38 #include "libavutil/imgutils.h"
39 #include "libavutil/intreadwrite.h"
40 #include "libavutil/time.h"
41 #include "libavutil/mathematics.h"
42 #include "libavutil/reverse.h"
49 #include "decklink_common.h"
50 #include "decklink_dec.h"
52 #define MAX_WIDTH_VANC 1920
53 const BMDDisplayMode AUTODETECT_DEFAULT_MODE = bmdModeNTSC;
55 typedef struct VANCLineNumber {
59 int field1_vanc_start;
63 /* These VANC line numbers need not be very accurate. In any case
64 * GetBufferForVerticalBlankingLine() will return an error when invalid
65 * ancillary line number was requested. We just need to make sure that the
66 * entire VANC region is covered, while making sure we don't decode VANC of
67 * another source during switching*/
68 static VANCLineNumber vanc_line_numbers[] = {
71 {bmdModeNTSC, 11, 19, 274, 282},
72 {bmdModeNTSC2398, 11, 19, 274, 282},
73 {bmdModePAL, 7, 22, 320, 335},
74 {bmdModeNTSCp, 11, -1, -1, 39},
75 {bmdModePALp, 7, -1, -1, 45},
79 {bmdModeHD1080p2398, 8, -1, -1, 42},
80 {bmdModeHD1080p24, 8, -1, -1, 42},
81 {bmdModeHD1080p25, 8, -1, -1, 42},
82 {bmdModeHD1080p2997, 8, -1, -1, 42},
83 {bmdModeHD1080p30, 8, -1, -1, 42},
84 {bmdModeHD1080i50, 8, 20, 570, 585},
85 {bmdModeHD1080i5994, 8, 20, 570, 585},
86 {bmdModeHD1080i6000, 8, 20, 570, 585},
87 {bmdModeHD1080p50, 8, -1, -1, 42},
88 {bmdModeHD1080p5994, 8, -1, -1, 42},
89 {bmdModeHD1080p6000, 8, -1, -1, 42},
93 {bmdModeHD720p50, 8, -1, -1, 26},
94 {bmdModeHD720p5994, 8, -1, -1, 26},
95 {bmdModeHD720p60, 8, -1, -1, 26},
97 /* For all other modes, for which we don't support VANC */
98 {bmdModeUnknown, 0, -1, -1, -1}
101 static int get_vanc_line_idx(BMDDisplayMode mode)
104 for (i = 0; i < FF_ARRAY_ELEMS(vanc_line_numbers); i++) {
105 if (mode == vanc_line_numbers[i].mode)
108 /* Return the VANC idx for Unknown mode */
112 static inline void clear_parity_bits(uint16_t *buf, int len) {
114 for (i = 0; i < len; i++)
118 static int check_vanc_parity_checksum(uint16_t *buf, int len, uint16_t checksum) {
120 uint16_t vanc_sum = 0;
121 for (i = 3; i < len - 1; i++) {
124 int p = av_parity(v & 0xff);
125 if ((!!p ^ !!(v & 0x100)) || (np != 1 && np != 2)) {
126 // Parity check failed
132 vanc_sum |= ((~vanc_sum & 0x100) << 1);
133 if (checksum != vanc_sum) {
134 // Checksum verification failed
140 /* The 10-bit VANC data is packed in V210, we only need the luma component. */
141 static void extract_luma_from_v210(uint16_t *dst, const uint8_t *src, int width)
144 for (i = 0; i < width / 3; i++) {
145 *dst++ = (src[1] >> 2) + ((src[2] & 15) << 6);
146 *dst++ = src[4] + ((src[5] & 3) << 8);
147 *dst++ = (src[6] >> 4) + ((src[7] & 63) << 4);
152 static uint8_t calc_parity_and_line_offset(int line)
154 uint8_t ret = (line < 313) << 5;
155 if (line >= 7 && line <= 22)
157 if (line >= 320 && line <= 335)
162 static void fill_data_unit_head(int line, uint8_t *tgt)
164 tgt[0] = 0x02; // data_unit_id
165 tgt[1] = 0x2c; // data_unit_length
166 tgt[2] = calc_parity_and_line_offset(line); // field_parity, line_offset
167 tgt[3] = 0xe4; // framing code
171 static uint8_t* teletext_data_unit_from_vbi_data(int line, uint8_t *src, uint8_t *tgt, vbi_pixfmt fmt)
173 vbi_bit_slicer slicer;
175 vbi_bit_slicer_init(&slicer, 720, 13500000, 6937500, 6937500, 0x00aaaae4, 0xffff, 18, 6, 42 * 8, VBI_MODULATION_NRZ_MSB, fmt);
177 if (vbi_bit_slice(&slicer, src, tgt + 4) == FALSE)
180 fill_data_unit_head(line, tgt);
185 static uint8_t* teletext_data_unit_from_vbi_data_10bit(int line, uint8_t *src, uint8_t *tgt)
189 uint8_t *pend = y + 720;
190 /* The 10-bit VBI data is packed in V210, but libzvbi only supports 8-bit,
191 * so we extract the 8 MSBs of the luma component, that is enough for
192 * teletext bit slicing. */
194 *py++ = (src[1] >> 4) + ((src[2] & 15) << 4);
195 *py++ = (src[4] >> 2) + ((src[5] & 3 ) << 6);
196 *py++ = (src[6] >> 6) + ((src[7] & 63) << 2);
199 return teletext_data_unit_from_vbi_data(line, y, tgt, VBI_PIXFMT_YUV420);
203 static uint8_t* teletext_data_unit_from_op47_vbi_packet(int line, uint16_t *py, uint8_t *tgt)
207 if (py[0] != 0x255 || py[1] != 0x255 || py[2] != 0x227)
210 fill_data_unit_head(line, tgt);
215 for (i = 0; i < 42; i++)
216 *tgt++ = ff_reverse[py[i] & 255];
221 static int linemask_matches(int line, int64_t mask)
224 if (line >= 6 && line <= 22)
226 if (line >= 318 && line <= 335)
227 shift = line - 318 + 17;
228 return shift >= 0 && ((1ULL << shift) & mask);
231 static uint8_t* teletext_data_unit_from_op47_data(uint16_t *py, uint16_t *pend, uint8_t *tgt, int64_t wanted_lines)
234 if (py[0] == 0x151 && py[1] == 0x115 && py[3] == 0x102) { // identifier, identifier, format code for WST teletext
235 uint16_t *descriptors = py + 4;
238 for (i = 0; i < 5 && py < pend - 45; i++, py += 45) {
239 int line = (descriptors[i] & 31) + (!(descriptors[i] & 128)) * 313;
240 if (line && linemask_matches(line, wanted_lines))
241 tgt = teletext_data_unit_from_op47_vbi_packet(line, py, tgt);
248 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)
250 uint16_t did = py[0]; // data id
251 uint16_t sdid = py[1]; // secondary data id
252 uint16_t dc = py[2] & 255; // data count
254 pend = FFMIN(pend, py + dc);
255 if (did == 0x143 && sdid == 0x102) { // subtitle distribution packet
256 tgt = teletext_data_unit_from_op47_data(py, pend, tgt, wanted_lines);
257 } else if (allow_multipacket && did == 0x143 && sdid == 0x203) { // VANC multipacket
258 py += 2; // priority, line/field
259 while (py < pend - 3) {
260 tgt = teletext_data_unit_from_ancillary_packet(py, pend, tgt, wanted_lines, 0);
261 py += 4 + (py[2] & 255); // ndid, nsdid, ndc, line/field
267 static uint8_t *vanc_to_cc(AVFormatContext *avctx, uint16_t *buf, size_t words,
270 size_t i, len = (buf[5] & 0xff) + 6 + 1;
271 uint8_t cdp_sum, rate;
274 uint16_t *cdp = &buf[6]; // CDP follows
275 if (cdp[0] != 0x96 || cdp[1] != 0x69) {
276 av_log(avctx, AV_LOG_WARNING, "Invalid CDP header 0x%.2x 0x%.2x\n", cdp[0], cdp[1]);
280 len -= 7; // remove VANC header and checksum
283 av_log(avctx, AV_LOG_WARNING, "CDP len %d != %zu\n", cdp[2], len);
288 for (i = 0; i < len - 1; i++)
290 cdp_sum = cdp_sum ? 256 - cdp_sum : 0;
291 if (cdp[len - 1] != cdp_sum) {
292 av_log(avctx, AV_LOG_WARNING, "CDP checksum invalid 0x%.4x != 0x%.4x\n", cdp_sum, cdp[len-1]);
297 if (!(rate & 0x0f)) {
298 av_log(avctx, AV_LOG_WARNING, "CDP frame rate invalid (0x%.2x)\n", rate);
303 av_log(avctx, AV_LOG_WARNING, "CDP frame rate invalid (0x%.2x)\n", rate);
307 if (!(cdp[4] & 0x43)) /* ccdata_present | caption_service_active | reserved */ {
308 av_log(avctx, AV_LOG_WARNING, "CDP flags invalid (0x%.2x)\n", cdp[4]);
312 hdr = (cdp[5] << 8) | cdp[6];
313 if (cdp[7] != 0x72) /* ccdata_id */ {
314 av_log(avctx, AV_LOG_WARNING, "Invalid ccdata_id 0x%.2x\n", cdp[7]);
319 if (!(cc_count & 0xe0)) {
320 av_log(avctx, AV_LOG_WARNING, "Invalid cc_count 0x%.2x\n", cc_count);
325 if ((len - 13) < cc_count * 3) {
326 av_log(avctx, AV_LOG_WARNING, "Invalid cc_count %d (> %zu)\n", cc_count * 3, len - 13);
330 if (cdp[len - 4] != 0x74) /* footer id */ {
331 av_log(avctx, AV_LOG_WARNING, "Invalid footer id 0x%.2x\n", cdp[len-4]);
335 ftr = (cdp[len - 3] << 8) | cdp[len - 2];
337 av_log(avctx, AV_LOG_WARNING, "Header 0x%.4x != Footer 0x%.4x\n", hdr, ftr);
341 cc = (uint8_t *)av_malloc(cc_count * 3);
343 av_log(avctx, AV_LOG_WARNING, "CC - av_malloc failed for cc_count = %d\n", cc_count);
347 for (size_t i = 0; i < cc_count; i++) {
348 cc[3*i + 0] = cdp[9 + 3*i+0] /* & 3 */;
349 cc[3*i + 1] = cdp[9 + 3*i+1];
350 cc[3*i + 2] = cdp[9 + 3*i+2];
357 static uint8_t *get_metadata(AVFormatContext *avctx, uint16_t *buf, size_t width,
358 uint8_t *tgt, size_t tgt_size, AVPacket *pkt)
360 decklink_cctx *cctx = (struct decklink_cctx *) avctx->priv_data;
361 uint16_t *max_buf = buf + width;
363 while (buf < max_buf - 6) {
365 uint16_t did = buf[3] & 0xFF; // data id
366 uint16_t sdid = buf[4] & 0xFF; // secondary data id
367 /* Check for VANC header */
368 if (buf[0] != 0 || buf[1] != 0x3ff || buf[2] != 0x3ff) {
372 len = (buf[5] & 0xff) + 6 + 1;
373 if (len > max_buf - buf) {
374 av_log(avctx, AV_LOG_WARNING, "Data Count (%d) > data left (%zu)\n",
379 if (did == 0x43 && (sdid == 0x02 || sdid == 0x03) && cctx->teletext_lines &&
380 width == 1920 && tgt_size >= 1920) {
381 if (check_vanc_parity_checksum(buf, len, buf[len - 1]) < 0) {
382 av_log(avctx, AV_LOG_WARNING, "VANC parity or checksum incorrect\n");
385 tgt = teletext_data_unit_from_ancillary_packet(buf + 3, buf + len, tgt, cctx->teletext_lines, 1);
386 } else if (did == 0x61 && sdid == 0x01) {
387 unsigned int data_len;
389 if (check_vanc_parity_checksum(buf, len, buf[len - 1]) < 0) {
390 av_log(avctx, AV_LOG_WARNING, "VANC parity or checksum incorrect\n");
393 clear_parity_bits(buf, len);
394 data = vanc_to_cc(avctx, buf, width, data_len);
396 if (av_packet_add_side_data(pkt, AV_PKT_DATA_A53_CC, data, data_len) < 0)
400 av_log(avctx, AV_LOG_DEBUG, "Unknown meta data DID = 0x%.2x SDID = 0x%.2x\n",
410 static void avpacket_queue_init(AVFormatContext *avctx, AVPacketQueue *q)
412 struct decklink_cctx *ctx = (struct decklink_cctx *)avctx->priv_data;
413 memset(q, 0, sizeof(AVPacketQueue));
414 pthread_mutex_init(&q->mutex, NULL);
415 pthread_cond_init(&q->cond, NULL);
417 q->max_q_size = ctx->queue_size;
420 static void avpacket_queue_flush(AVPacketQueue *q)
422 AVPacketList *pkt, *pkt1;
424 pthread_mutex_lock(&q->mutex);
425 for (pkt = q->first_pkt; pkt != NULL; pkt = pkt1) {
427 av_packet_unref(&pkt->pkt);
434 pthread_mutex_unlock(&q->mutex);
437 static void avpacket_queue_end(AVPacketQueue *q)
439 avpacket_queue_flush(q);
440 pthread_mutex_destroy(&q->mutex);
441 pthread_cond_destroy(&q->cond);
444 static unsigned long long avpacket_queue_size(AVPacketQueue *q)
446 unsigned long long size;
447 pthread_mutex_lock(&q->mutex);
449 pthread_mutex_unlock(&q->mutex);
453 static int avpacket_queue_put(AVPacketQueue *q, AVPacket *pkt)
458 // Drop Packet if queue size is > maximum queue size
459 if (avpacket_queue_size(q) > (uint64_t)q->max_q_size) {
460 av_log(q->avctx, AV_LOG_WARNING, "Decklink input buffer overrun!\n");
464 pkt1 = (AVPacketList *)av_mallocz(sizeof(AVPacketList));
468 ret = av_packet_ref(&pkt1->pkt, pkt);
469 av_packet_unref(pkt);
476 pthread_mutex_lock(&q->mutex);
481 q->last_pkt->next = pkt1;
486 q->size += pkt1->pkt.size + sizeof(*pkt1);
488 pthread_cond_signal(&q->cond);
490 pthread_mutex_unlock(&q->mutex);
494 static int avpacket_queue_get(AVPacketQueue *q, AVPacket *pkt, int block)
499 pthread_mutex_lock(&q->mutex);
504 q->first_pkt = pkt1->next;
509 q->size -= pkt1->pkt.size + sizeof(*pkt1);
518 pthread_cond_wait(&q->cond, &q->mutex);
521 pthread_mutex_unlock(&q->mutex);
525 class decklink_input_callback : public IDeckLinkInputCallback
528 decklink_input_callback(AVFormatContext *_avctx);
529 ~decklink_input_callback();
531 virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, LPVOID *ppv) { return E_NOINTERFACE; }
532 virtual ULONG STDMETHODCALLTYPE AddRef(void);
533 virtual ULONG STDMETHODCALLTYPE Release(void);
534 virtual HRESULT STDMETHODCALLTYPE VideoInputFormatChanged(BMDVideoInputFormatChangedEvents, IDeckLinkDisplayMode*, BMDDetectedVideoInputFormatFlags);
535 virtual HRESULT STDMETHODCALLTYPE VideoInputFrameArrived(IDeckLinkVideoInputFrame*, IDeckLinkAudioInputPacket*);
539 pthread_mutex_t m_mutex;
540 AVFormatContext *avctx;
543 int64_t initial_video_pts;
544 int64_t initial_audio_pts;
547 decklink_input_callback::decklink_input_callback(AVFormatContext *_avctx) : m_refCount(0)
550 decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
551 ctx = (struct decklink_ctx *)cctx->ctx;
553 initial_audio_pts = initial_video_pts = AV_NOPTS_VALUE;
554 pthread_mutex_init(&m_mutex, NULL);
557 decklink_input_callback::~decklink_input_callback()
559 pthread_mutex_destroy(&m_mutex);
562 ULONG decklink_input_callback::AddRef(void)
564 pthread_mutex_lock(&m_mutex);
566 pthread_mutex_unlock(&m_mutex);
568 return (ULONG)m_refCount;
571 ULONG decklink_input_callback::Release(void)
573 pthread_mutex_lock(&m_mutex);
575 pthread_mutex_unlock(&m_mutex);
577 if (m_refCount == 0) {
582 return (ULONG)m_refCount;
585 static int64_t get_pkt_pts(IDeckLinkVideoInputFrame *videoFrame,
586 IDeckLinkAudioInputPacket *audioFrame,
588 DecklinkPtsSource pts_src,
589 AVRational time_base, int64_t *initial_pts)
591 int64_t pts = AV_NOPTS_VALUE;
592 BMDTimeValue bmd_pts;
593 BMDTimeValue bmd_duration;
594 HRESULT res = E_INVALIDARG;
598 res = audioFrame->GetPacketTime(&bmd_pts, time_base.den);
602 res = videoFrame->GetStreamTime(&bmd_pts, &bmd_duration, time_base.den);
604 case PTS_SRC_REFERENCE:
606 res = videoFrame->GetHardwareReferenceTimestamp(time_base.den, &bmd_pts, &bmd_duration);
608 case PTS_SRC_WALLCLOCK:
610 /* MSVC does not support compound literals like AV_TIME_BASE_Q
611 * in C++ code (compiler error C4576) */
614 timebase.den = AV_TIME_BASE;
615 pts = av_rescale_q(wallclock, timebase, time_base);
620 pts = bmd_pts / time_base.num;
622 if (pts != AV_NOPTS_VALUE && *initial_pts == AV_NOPTS_VALUE)
624 if (*initial_pts != AV_NOPTS_VALUE)
630 HRESULT decklink_input_callback::VideoInputFrameArrived(
631 IDeckLinkVideoInputFrame *videoFrame, IDeckLinkAudioInputPacket *audioFrame)
634 void *audioFrameBytes;
635 BMDTimeValue frameTime;
636 BMDTimeValue frameDuration;
637 int64_t wallclock = 0;
639 if (ctx->autodetect) {
640 if (videoFrame && !(videoFrame->GetFlags() & bmdFrameHasNoInputSource) &&
641 ctx->bmd_mode == bmdModeUnknown)
643 ctx->bmd_mode = AUTODETECT_DEFAULT_MODE;
649 if (ctx->audio_pts_source == PTS_SRC_WALLCLOCK || ctx->video_pts_source == PTS_SRC_WALLCLOCK)
650 wallclock = av_gettime_relative();
652 // Handle Video Frame
655 av_init_packet(&pkt);
656 if (ctx->frameCount % 25 == 0) {
657 unsigned long long qsize = avpacket_queue_size(&ctx->queue);
658 av_log(avctx, AV_LOG_DEBUG,
659 "Frame received (#%lu) - Valid (%liB) - QSize %fMB\n",
661 videoFrame->GetRowBytes() * videoFrame->GetHeight(),
662 (double)qsize / 1024 / 1024);
665 videoFrame->GetBytes(&frameBytes);
666 videoFrame->GetStreamTime(&frameTime, &frameDuration,
667 ctx->video_st->time_base.den);
669 if (videoFrame->GetFlags() & bmdFrameHasNoInputSource) {
670 if (ctx->draw_bars && videoFrame->GetPixelFormat() == bmdFormat8BitYUV) {
672 0xEA80EA80, 0xD292D210, 0xA910A9A5, 0x90229035,
673 0x6ADD6ACA, 0x51EF515A, 0x286D28EF, 0x10801080 };
674 int width = videoFrame->GetWidth();
675 int height = videoFrame->GetHeight();
676 unsigned *p = (unsigned *)frameBytes;
678 for (int y = 0; y < height; y++) {
679 for (int x = 0; x < width; x += 2)
680 *p++ = bars[(x * 8) / width];
685 av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - No input signal detected "
686 "- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped);
691 av_log(avctx, AV_LOG_WARNING, "Frame received (#%lu) - Input returned "
692 "- Frames dropped %u\n", ctx->frameCount, ++ctx->dropped);
697 pkt.pts = get_pkt_pts(videoFrame, audioFrame, wallclock, ctx->video_pts_source, ctx->video_st->time_base, &initial_video_pts);
700 pkt.duration = frameDuration;
701 //To be made sure it still applies
702 pkt.flags |= AV_PKT_FLAG_KEY;
703 pkt.stream_index = ctx->video_st->index;
704 pkt.data = (uint8_t *)frameBytes;
705 pkt.size = videoFrame->GetRowBytes() *
706 videoFrame->GetHeight();
707 //fprintf(stderr,"Video Frame size %d ts %d\n", pkt.size, pkt.pts);
710 IDeckLinkVideoFrameAncillary *vanc;
712 uint8_t txt_buf0[3531]; // 35 * 46 bytes decoded teletext lines + 1 byte data_identifier + 1920 bytes OP47 decode buffer
713 uint8_t *txt_buf = txt_buf0;
715 if (videoFrame->GetAncillaryData(&vanc) == S_OK) {
717 int64_t line_mask = 1;
718 BMDPixelFormat vanc_format = vanc->GetPixelFormat();
719 txt_buf[0] = 0x10; // data_identifier - EBU_data
722 if (ctx->bmd_mode == bmdModePAL && ctx->teletext_lines &&
723 (vanc_format == bmdFormat8BitYUV || vanc_format == bmdFormat10BitYUV)) {
724 av_assert0(videoFrame->GetWidth() == 720);
725 for (i = 6; i < 336; i++, line_mask <<= 1) {
727 if ((ctx->teletext_lines & line_mask) && vanc->GetBufferForVerticalBlankingLine(i, (void**)&buf) == S_OK) {
728 if (vanc_format == bmdFormat8BitYUV)
729 txt_buf = teletext_data_unit_from_vbi_data(i, buf, txt_buf, VBI_PIXFMT_UYVY);
731 txt_buf = teletext_data_unit_from_vbi_data_10bit(i, buf, txt_buf);
738 if (vanc_format == bmdFormat10BitYUV && videoFrame->GetWidth() <= MAX_WIDTH_VANC) {
739 int idx = get_vanc_line_idx(ctx->bmd_mode);
740 for (i = vanc_line_numbers[idx].vanc_start; i <= vanc_line_numbers[idx].vanc_end; i++) {
742 if (vanc->GetBufferForVerticalBlankingLine(i, (void**)&buf) == S_OK) {
743 uint16_t luma_vanc[MAX_WIDTH_VANC];
744 extract_luma_from_v210(luma_vanc, buf, videoFrame->GetWidth());
745 txt_buf = get_metadata(avctx, luma_vanc, videoFrame->GetWidth(),
746 txt_buf, sizeof(txt_buf0) - (txt_buf - txt_buf0), &pkt);
748 if (i == vanc_line_numbers[idx].field0_vanc_end)
749 i = vanc_line_numbers[idx].field1_vanc_start - 1;
753 if (txt_buf - txt_buf0 > 1) {
754 int stuffing_units = (4 - ((45 + txt_buf - txt_buf0) / 46) % 4) % 4;
755 while (stuffing_units--) {
756 memset(txt_buf, 0xff, 46);
757 txt_buf[1] = 0x2c; // data_unit_length
760 av_init_packet(&txt_pkt);
761 txt_pkt.pts = pkt.pts;
762 txt_pkt.dts = pkt.dts;
763 txt_pkt.stream_index = ctx->teletext_st->index;
764 txt_pkt.data = txt_buf0;
765 txt_pkt.size = txt_buf - txt_buf0;
766 if (avpacket_queue_put(&ctx->queue, &txt_pkt) < 0) {
773 if (avpacket_queue_put(&ctx->queue, &pkt) < 0) {
778 // Handle Audio Frame
781 BMDTimeValue audio_pts;
782 av_init_packet(&pkt);
785 pkt.size = audioFrame->GetSampleFrameCount() * ctx->audio_st->codecpar->channels * (ctx->audio_depth / 8);
786 audioFrame->GetBytes(&audioFrameBytes);
787 audioFrame->GetPacketTime(&audio_pts, ctx->audio_st->time_base.den);
788 pkt.pts = get_pkt_pts(videoFrame, audioFrame, wallclock, ctx->audio_pts_source, ctx->audio_st->time_base, &initial_audio_pts);
791 //fprintf(stderr,"Audio Frame size %d ts %d\n", pkt.size, pkt.pts);
792 pkt.flags |= AV_PKT_FLAG_KEY;
793 pkt.stream_index = ctx->audio_st->index;
794 pkt.data = (uint8_t *)audioFrameBytes;
796 if (avpacket_queue_put(&ctx->queue, &pkt) < 0) {
804 HRESULT decklink_input_callback::VideoInputFormatChanged(
805 BMDVideoInputFormatChangedEvents events, IDeckLinkDisplayMode *mode,
806 BMDDetectedVideoInputFormatFlags)
808 ctx->bmd_mode = mode->GetDisplayMode();
812 static int decklink_autodetect(struct decklink_cctx *cctx) {
813 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
814 DECKLINK_BOOL autodetect_supported = false;
817 if (ctx->attr->GetFlag(BMDDeckLinkSupportsInputFormatDetection, &autodetect_supported) != S_OK)
819 if (autodetect_supported == false)
823 ctx->bmd_mode = bmdModeUnknown;
824 if (ctx->dli->EnableVideoInput(AUTODETECT_DEFAULT_MODE,
826 bmdVideoInputEnableFormatDetection) != S_OK) {
830 if (ctx->dli->StartStreams() != S_OK) {
835 for (i = 0; i < 10; i++) {
837 /* Sometimes VideoInputFrameArrived is called without the
838 * bmdFrameHasNoInputSource flag before VideoInputFormatChanged.
839 * So don't break for bmd_mode == AUTODETECT_DEFAULT_MODE. */
840 if (ctx->bmd_mode != bmdModeUnknown &&
841 ctx->bmd_mode != AUTODETECT_DEFAULT_MODE)
845 ctx->dli->PauseStreams();
846 ctx->dli->FlushStreams();
848 if (ctx->bmd_mode != bmdModeUnknown) {
849 cctx->format_code = (char *)av_mallocz(5);
850 if (!cctx->format_code)
852 AV_WB32(cctx->format_code, ctx->bmd_mode);
862 av_cold int ff_decklink_read_close(AVFormatContext *avctx)
864 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
865 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
867 if (ctx->capture_started) {
868 ctx->dli->StopStreams();
869 ctx->dli->DisableVideoInput();
870 ctx->dli->DisableAudioInput();
873 ff_decklink_cleanup(avctx);
874 avpacket_queue_end(&ctx->queue);
876 av_freep(&cctx->ctx);
881 av_cold int ff_decklink_read_header(AVFormatContext *avctx)
883 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
884 struct decklink_ctx *ctx;
892 ctx = (struct decklink_ctx *) av_mallocz(sizeof(struct decklink_ctx));
894 return AVERROR(ENOMEM);
895 ctx->list_devices = cctx->list_devices;
896 ctx->list_formats = cctx->list_formats;
897 ctx->teletext_lines = cctx->teletext_lines;
898 ctx->preroll = cctx->preroll;
899 ctx->duplex_mode = cctx->duplex_mode;
900 if (cctx->video_input > 0 && (unsigned int)cctx->video_input < FF_ARRAY_ELEMS(decklink_video_connection_map))
901 ctx->video_input = decklink_video_connection_map[cctx->video_input];
902 if (cctx->audio_input > 0 && (unsigned int)cctx->audio_input < FF_ARRAY_ELEMS(decklink_audio_connection_map))
903 ctx->audio_input = decklink_audio_connection_map[cctx->audio_input];
904 ctx->audio_pts_source = cctx->audio_pts_source;
905 ctx->video_pts_source = cctx->video_pts_source;
906 ctx->draw_bars = cctx->draw_bars;
907 ctx->audio_depth = cctx->audio_depth;
910 /* Check audio channel option for valid values: 2, 8 or 16 */
911 switch (cctx->audio_channels) {
917 av_log(avctx, AV_LOG_ERROR, "Value of channels option must be one of 2, 8 or 16\n");
918 return AVERROR(EINVAL);
921 /* Check audio bit depth option for valid values: 16 or 32 */
922 switch (cctx->audio_depth) {
927 av_log(avctx, AV_LOG_ERROR, "Value for audio bit depth option must be either 16 or 32\n");
928 return AVERROR(EINVAL);
931 /* List available devices. */
932 if (ctx->list_devices) {
933 ff_decklink_list_devices_legacy(avctx, 1, 0);
938 av_log(avctx, AV_LOG_WARNING, "The bm_v210 option is deprecated and will be removed. Please use the -raw_format yuv422p10.\n");
939 cctx->raw_format = MKBETAG('v','2','1','0');
942 strcpy (fname, avctx->filename);
943 tmp=strchr (fname, '@');
945 av_log(avctx, AV_LOG_WARNING, "The @mode syntax is deprecated and will be removed. Please use the -format_code option.\n");
946 mode_num = atoi (tmp+1);
950 ret = ff_decklink_init_device(avctx, fname);
954 /* Get input device. */
955 if (ctx->dl->QueryInterface(IID_IDeckLinkInput, (void **) &ctx->dli) != S_OK) {
956 av_log(avctx, AV_LOG_ERROR, "Could not open input device from '%s'\n",
962 /* List supported formats. */
963 if (ctx->list_formats) {
964 ff_decklink_list_formats(avctx, DIRECTION_IN);
969 if (ff_decklink_set_configs(avctx, DIRECTION_IN) < 0) {
970 av_log(avctx, AV_LOG_ERROR, "Could not set input configuration\n");
975 ctx->input_callback = new decklink_input_callback(avctx);
976 ctx->dli->SetCallback(ctx->input_callback);
978 if (mode_num == 0 && !cctx->format_code) {
979 if (decklink_autodetect(cctx) < 0) {
980 av_log(avctx, AV_LOG_ERROR, "Cannot Autodetect input stream or No signal\n");
984 av_log(avctx, AV_LOG_INFO, "Autodetected the input mode\n");
986 if (ff_decklink_set_format(avctx, DIRECTION_IN, mode_num) < 0) {
987 av_log(avctx, AV_LOG_ERROR, "Could not set mode number %d or format code %s for %s\n",
988 mode_num, (cctx->format_code) ? cctx->format_code : "(unset)", fname);
994 if (ctx->teletext_lines && ctx->bmd_mode == bmdModePAL) {
995 av_log(avctx, AV_LOG_ERROR, "Libzvbi support is needed for capturing SD PAL teletext, please recompile FFmpeg.\n");
996 ret = AVERROR(ENOSYS);
1001 /* Setup streams. */
1002 st = avformat_new_stream(avctx, NULL);
1004 av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n");
1005 ret = AVERROR(ENOMEM);
1008 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1009 st->codecpar->codec_id = cctx->audio_depth == 32 ? AV_CODEC_ID_PCM_S32LE : AV_CODEC_ID_PCM_S16LE;
1010 st->codecpar->sample_rate = bmdAudioSampleRate48kHz;
1011 st->codecpar->channels = cctx->audio_channels;
1012 avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
1015 st = avformat_new_stream(avctx, NULL);
1017 av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n");
1018 ret = AVERROR(ENOMEM);
1021 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
1022 st->codecpar->width = ctx->bmd_width;
1023 st->codecpar->height = ctx->bmd_height;
1025 st->time_base.den = ctx->bmd_tb_den;
1026 st->time_base.num = ctx->bmd_tb_num;
1027 st->r_frame_rate = av_make_q(st->time_base.den, st->time_base.num);
1029 switch((BMDPixelFormat)cctx->raw_format) {
1030 case bmdFormat8BitYUV:
1031 st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
1032 st->codecpar->codec_tag = MKTAG('U', 'Y', 'V', 'Y');
1033 st->codecpar->format = AV_PIX_FMT_UYVY422;
1034 st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 16, st->time_base.den, st->time_base.num);
1036 case bmdFormat10BitYUV:
1037 st->codecpar->codec_id = AV_CODEC_ID_V210;
1038 st->codecpar->codec_tag = MKTAG('V','2','1','0');
1039 st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 64, st->time_base.den, st->time_base.num * 3);
1040 st->codecpar->bits_per_coded_sample = 10;
1042 case bmdFormat8BitARGB:
1043 st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
1044 st->codecpar->codec_tag = avcodec_pix_fmt_to_codec_tag((enum AVPixelFormat)st->codecpar->format);;
1045 st->codecpar->format = AV_PIX_FMT_0RGB;
1046 st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 32, st->time_base.den, st->time_base.num);
1048 case bmdFormat8BitBGRA:
1049 st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
1050 st->codecpar->codec_tag = avcodec_pix_fmt_to_codec_tag((enum AVPixelFormat)st->codecpar->format);
1051 st->codecpar->format = AV_PIX_FMT_BGR0;
1052 st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 32, st->time_base.den, st->time_base.num);
1054 case bmdFormat10BitRGB:
1055 st->codecpar->codec_id = AV_CODEC_ID_R210;
1056 st->codecpar->codec_tag = MKTAG('R','2','1','0');
1057 st->codecpar->format = AV_PIX_FMT_RGB48LE;
1058 st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 30, st->time_base.den, st->time_base.num);
1059 st->codecpar->bits_per_coded_sample = 10;
1062 av_log(avctx, AV_LOG_ERROR, "Raw Format %.4s not supported\n", (char*) &cctx->raw_format);
1063 ret = AVERROR(EINVAL);
1067 switch (ctx->bmd_field_dominance) {
1068 case bmdUpperFieldFirst:
1069 st->codecpar->field_order = AV_FIELD_TT;
1071 case bmdLowerFieldFirst:
1072 st->codecpar->field_order = AV_FIELD_BB;
1074 case bmdProgressiveFrame:
1075 case bmdProgressiveSegmentedFrame:
1076 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
1080 avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
1084 if (ctx->teletext_lines) {
1085 st = avformat_new_stream(avctx, NULL);
1087 av_log(avctx, AV_LOG_ERROR, "Cannot add stream\n");
1088 ret = AVERROR(ENOMEM);
1091 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
1092 st->time_base.den = ctx->bmd_tb_den;
1093 st->time_base.num = ctx->bmd_tb_num;
1094 st->codecpar->codec_id = AV_CODEC_ID_DVB_TELETEXT;
1095 avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
1096 ctx->teletext_st = st;
1099 av_log(avctx, AV_LOG_VERBOSE, "Using %d input audio channels\n", ctx->audio_st->codecpar->channels);
1100 result = ctx->dli->EnableAudioInput(bmdAudioSampleRate48kHz, cctx->audio_depth == 32 ? bmdAudioSampleType32bitInteger : bmdAudioSampleType16bitInteger, ctx->audio_st->codecpar->channels);
1102 if (result != S_OK) {
1103 av_log(avctx, AV_LOG_ERROR, "Cannot enable audio input\n");
1108 result = ctx->dli->EnableVideoInput(ctx->bmd_mode,
1109 (BMDPixelFormat) cctx->raw_format,
1110 bmdVideoInputFlagDefault);
1112 if (result != S_OK) {
1113 av_log(avctx, AV_LOG_ERROR, "Cannot enable video input\n");
1118 avpacket_queue_init (avctx, &ctx->queue);
1120 if (ctx->dli->StartStreams() != S_OK) {
1121 av_log(avctx, AV_LOG_ERROR, "Cannot start input stream\n");
1129 ff_decklink_cleanup(avctx);
1133 int ff_decklink_read_packet(AVFormatContext *avctx, AVPacket *pkt)
1135 struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
1136 struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
1138 avpacket_queue_get(&ctx->queue, pkt, 1);
1143 int ff_decklink_list_input_devices(AVFormatContext *avctx, struct AVDeviceInfoList *device_list)
1145 return ff_decklink_list_devices(avctx, device_list, 1, 0);