/*
* Blackmagic DeckLink input
* Copyright (c) 2013-2014 Luca Barbato, Deti Fliegl
+ * Copyright (c) 2017 Akamai Technologies, Inc.
*
* This file is part of FFmpeg.
*
#include "libavutil/imgutils.h"
#include "libavutil/time.h"
#include "libavutil/mathematics.h"
+#include "libavutil/reverse.h"
#if CONFIG_LIBZVBI
#include <libzvbi.h>
#endif
#include "decklink_common.h"
#include "decklink_dec.h"
-#if CONFIG_LIBZVBI
static uint8_t calc_parity_and_line_offset(int line)
{
uint8_t ret = (line < 313) << 5;
tgt[3] = 0xe4; // framing code
}
+#if CONFIG_LIBZVBI
static uint8_t* teletext_data_unit_from_vbi_data(int line, uint8_t *src, uint8_t *tgt, vbi_pixfmt fmt)
{
vbi_bit_slicer slicer;
}
#endif
+static uint8_t* teletext_data_unit_from_op47_vbi_packet(int line, uint16_t *py, uint8_t *tgt)
+{
+ int i;
+
+ if (py[0] != 0x255 || py[1] != 0x255 || py[2] != 0x227)
+ return tgt;
+
+ fill_data_unit_head(line, tgt);
+
+ py += 3;
+ tgt += 4;
+
+ for (i = 0; i < 42; i++)
+ *tgt++ = ff_reverse[py[i] & 255];
+
+ return tgt;
+}
+
+static int linemask_matches(int line, int64_t mask)
+{
+ int shift = -1;
+ if (line >= 6 && line <= 22)
+ shift = line - 6;
+ if (line >= 318 && line <= 335)
+ shift = line - 318 + 17;
+ return shift >= 0 && ((1ULL << shift) & mask);
+}
+
+static uint8_t* teletext_data_unit_from_op47_data(uint16_t *py, uint16_t *pend, uint8_t *tgt, int64_t wanted_lines)
+{
+ if (py < pend - 9) {
+ if (py[0] == 0x151 && py[1] == 0x115 && py[3] == 0x102) { // identifier, identifier, format code for WST teletext
+ uint16_t *descriptors = py + 4;
+ int i;
+ py += 9;
+ for (i = 0; i < 5 && py < pend - 45; i++, py += 45) {
+ int line = (descriptors[i] & 31) + (!(descriptors[i] & 128)) * 313;
+ if (line && linemask_matches(line, wanted_lines))
+ tgt = teletext_data_unit_from_op47_vbi_packet(line, py, tgt);
+ }
+ }
+ }
+ return tgt;
+}
+
+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)
+{
+ uint16_t did = py[0]; // data id
+ uint16_t sdid = py[1]; // secondary data id
+ uint16_t dc = py[2] & 255; // data count
+ py += 3;
+ pend = FFMIN(pend, py + dc);
+ if (did == 0x143 && sdid == 0x102) { // subtitle distribution packet
+ tgt = teletext_data_unit_from_op47_data(py, pend, tgt, wanted_lines);
+ } else if (allow_multipacket && did == 0x143 && sdid == 0x203) { // VANC multipacket
+ py += 2; // priority, line/field
+ while (py < pend - 3) {
+ tgt = teletext_data_unit_from_ancillary_packet(py, pend, tgt, wanted_lines, 0);
+ py += 4 + (py[2] & 255); // ndid, nsdid, ndc, line/field
+ }
+ }
+ return tgt;
+}
+
+static uint8_t* teletext_data_unit_from_vanc_data(uint8_t *src, uint8_t *tgt, int64_t wanted_lines)
+{
+ uint16_t y[1920];
+ uint16_t *py = y;
+ uint16_t *pend = y + 1920;
+ /* The 10-bit VANC data is packed in V210, we only need the luma component. */
+ while (py < pend) {
+ *py++ = (src[1] >> 2) + ((src[2] & 15) << 6);
+ *py++ = src[4] + ((src[5] & 3) << 8);
+ *py++ = (src[6] >> 4) + ((src[7] & 63) << 4);
+ src += 8;
+ }
+ py = y;
+ while (py < pend - 6) {
+ if (py[0] == 0 && py[1] == 0x3ff && py[2] == 0x3ff) { // ancillary data flag
+ py += 3;
+ tgt = teletext_data_unit_from_ancillary_packet(py, pend, tgt, wanted_lines, 0);
+ py += py[2] & 255;
+ } else {
+ py++;
+ }
+ }
+ return tgt;
+}
+
static void avpacket_queue_init(AVFormatContext *avctx, AVPacketQueue *q)
{
+ struct decklink_cctx *ctx = (struct decklink_cctx *)avctx->priv_data;
memset(q, 0, sizeof(AVPacketQueue));
pthread_mutex_init(&q->mutex, NULL);
pthread_cond_init(&q->cond, NULL);
q->avctx = avctx;
+ q->max_q_size = ctx->queue_size;
}
static void avpacket_queue_flush(AVPacketQueue *q)
{
AVPacketList *pkt1;
- // Drop Packet if queue size is > 1GB
- if (avpacket_queue_size(q) > 1024 * 1024 * 1024 ) {
+ // Drop Packet if queue size is > maximum queue size
+ if (avpacket_queue_size(q) > (uint64_t)q->max_q_size) {
av_log(q->avctx, AV_LOG_WARNING, "Decklink input buffer overrun!\n");
return -1;
}
videoFrame->GetHeight();
//fprintf(stderr,"Video Frame size %d ts %d\n", pkt.size, pkt.pts);
-#if CONFIG_LIBZVBI
if (!no_video && ctx->teletext_lines) {
IDeckLinkVideoFrameAncillary *vanc;
AVPacket txt_pkt;
- uint8_t txt_buf0[1611]; // max 35 * 46 bytes decoded teletext lines + 1 byte data_identifier
+ uint8_t txt_buf0[3531]; // 35 * 46 bytes decoded teletext lines + 1 byte data_identifier + 1920 bytes OP47 decode buffer
uint8_t *txt_buf = txt_buf0;
if (videoFrame->GetAncillaryData(&vanc) == S_OK) {
BMDPixelFormat vanc_format = vanc->GetPixelFormat();
txt_buf[0] = 0x10; // data_identifier - EBU_data
txt_buf++;
+#if CONFIG_LIBZVBI
if (ctx->bmd_mode == bmdModePAL && (vanc_format == bmdFormat8BitYUV || vanc_format == bmdFormat10BitYUV)) {
av_assert0(videoFrame->GetWidth() == 720);
for (i = 6; i < 336; i++, line_mask <<= 1) {
i = 317;
}
}
+#endif
+ if (videoFrame->GetWidth() == 1920 && vanc_format == bmdFormat10BitYUV) {
+ int first_active_line = ctx->bmd_field_dominance == bmdProgressiveFrame ? 42 : 584;
+ for (i = 8; i < first_active_line; i++) {
+ uint8_t *buf;
+ if (vanc->GetBufferForVerticalBlankingLine(i, (void**)&buf) == S_OK)
+ txt_buf = teletext_data_unit_from_vanc_data(buf, txt_buf, ctx->teletext_lines);
+ if (ctx->bmd_field_dominance != bmdProgressiveFrame && i == 20) // skip field1 active lines
+ i = 569;
+ if (txt_buf - txt_buf0 > 1611) { // ensure we still have at least 1920 bytes free in the buffer
+ av_log(avctx, AV_LOG_ERROR, "Too many OP47 teletext packets.\n");
+ break;
+ }
+ }
+ }
vanc->Release();
if (txt_buf - txt_buf0 > 1) {
int stuffing_units = (4 - ((45 + txt_buf - txt_buf0) / 46) % 4) % 4;
}
}
}
-#endif
if (avpacket_queue_put(&ctx->queue, &pkt) < 0) {
++ctx->dropped;
ctx->draw_bars = cctx->draw_bars;
cctx->ctx = ctx;
-#if !CONFIG_LIBZVBI
- if (ctx->teletext_lines) {
- av_log(avctx, AV_LOG_ERROR, "Libzvbi support is needed for capturing teletext, please recompile FFmpeg.\n");
- return AVERROR(ENOSYS);
- }
-#endif
-
/* Check audio channel option for valid values: 2, 8 or 16 */
switch (cctx->audio_channels) {
case 2:
}
}
+#if !CONFIG_LIBZVBI
+ if (ctx->teletext_lines && ctx->bmd_mode == bmdModePAL) {
+ av_log(avctx, AV_LOG_ERROR, "Libzvbi support is needed for capturing SD PAL teletext, please recompile FFmpeg.\n");
+ ret = AVERROR(ENOSYS);
+ goto error;
+ }
+#endif
+
/* Setup streams. */
st = avformat_new_stream(avctx, NULL);
if (!st) {
st->codecpar->bit_rate = av_rescale(ctx->bmd_width * ctx->bmd_height * 16, st->time_base.den, st->time_base.num);
}
+ switch (ctx->bmd_field_dominance) {
+ case bmdUpperFieldFirst:
+ st->codecpar->field_order = AV_FIELD_TT;
+ break;
+ case bmdLowerFieldFirst:
+ st->codecpar->field_order = AV_FIELD_BB;
+ break;
+ case bmdProgressiveFrame:
+ case bmdProgressiveSegmentedFrame:
+ st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
+ break;
+ }
+
avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
ctx->video_st=st;
{
struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
- AVFrame *frame = ctx->video_st->codec->coded_frame;
avpacket_queue_get(&ctx->queue, pkt, 1);
- if (frame && (ctx->bmd_field_dominance == bmdUpperFieldFirst || ctx->bmd_field_dominance == bmdLowerFieldFirst)) {
- frame->interlaced_frame = 1;
- if (ctx->bmd_field_dominance == bmdUpperFieldFirst) {
- frame->top_field_first = 1;
- }
- }
return 0;
}
projects / ffmpeg / blobdiff