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libavdevice/decklink: configurablity to set max queue size

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Signed-off-by: Ravindra Patagar <rpatagar@akamai.com>
Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Ravindra 2017-08-10 11:59:30 +05:30 committed by Marton Balint
parent 6f03ffb47d
commit f3913dcc06
6 changed files with 17 additions and 3 deletions
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5
doc/indevs.texi
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@ -289,6 +289,11 @@ Sets the audio packet timestamp source. Must be @samp{video}, @samp{audio},
If set to @samp{true}, color bars are drawn in the event of a signal loss.
Defaults to @samp{true}.
@item queue_size
Sets maximum input buffer size in bytes. If the buffering reaches this value,
incoming frames will be dropped.
Defaults to @samp{1073741824}.
@end table
@subsection Examples

2
libavdevice/decklink_common.h
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@ -1,6 +1,7 @@
/*
* Blackmagic DeckLink common code
* Copyright (c) 2013-2014 Ramiro Polla, Luca Barbato, Deti Fliegl
* Copyright (c) 2017 Akamai Technologies, Inc.
*
* This file is part of FFmpeg.
*
@ -38,6 +39,7 @@ typedef struct AVPacketQueue {
pthread_mutex_t mutex;
pthread_cond_t cond;
AVFormatContext *avctx;
int64_t max_q_size;
} AVPacketQueue;
struct decklink_ctx {

2
libavdevice/decklink_common_c.h
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@ -1,6 +1,7 @@
/*
* Blackmagic DeckLink common code
* Copyright (c) 2013-2014 Ramiro Polla
* Copyright (c) 2017 Akamai Technologies, Inc.
*
* This file is part of FFmpeg.
*
@ -48,6 +49,7 @@ struct decklink_cctx {
int video_input;
int draw_bars;
char *format_code;
int64_t queue_size;
};
#endif /* AVDEVICE_DECKLINK_COMMON_C_H */

7
libavdevice/decklink_dec.cpp
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@ -1,6 +1,7 @@
/*
* Blackmagic DeckLink input
* Copyright (c) 2013-2014 Luca Barbato, Deti Fliegl
* Copyright (c) 2017 Akamai Technologies, Inc.
*
* This file is part of FFmpeg.
*
@ -187,10 +188,12 @@ static uint8_t* teletext_data_unit_from_vanc_data(uint8_t *src, uint8_t *tgt, in
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)
@ -230,8 +233,8 @@ static int avpacket_queue_put(AVPacketQueue *q, AVPacket *pkt)
{
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) > q->max_q_size) {
av_log(q->avctx, AV_LOG_WARNING, "Decklink input buffer overrun!\n");
return -1;
}

2
libavdevice/decklink_dec_c.c
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@ -1,6 +1,7 @@
/*
* Blackmagic DeckLink input
* Copyright (c) 2014 Deti Fliegl
* Copyright (c) 2017 Akamai Technologies, Inc.
*
* This file is part of FFmpeg.
*
@ -64,6 +65,7 @@ static const AVOption options[] = {
{ "reference", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = PTS_SRC_REFERENCE}, 0, 0, DEC, "pts_source"},
{ "wallclock", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = PTS_SRC_WALLCLOCK}, 0, 0, DEC, "pts_source"},
{ "draw_bars", "draw bars on signal loss" , OFFSET(draw_bars), AV_OPT_TYPE_BOOL, { .i64 = 1}, 0, 1, DEC },
{ "queue_size", "input queue buffer size", OFFSET(queue_size), AV_OPT_TYPE_INT64, { .i64 = (1024 * 1024 * 1024)}, 0, INT64_MAX, DEC },
{ NULL },
};

2
libavdevice/version.h
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@ -29,7 +29,7 @@
#define LIBAVDEVICE_VERSION_MAJOR 57
#define LIBAVDEVICE_VERSION_MINOR 7
#define LIBAVDEVICE_VERSION_MICRO 100
#define LIBAVDEVICE_VERSION_MICRO 101
#define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \
LIBAVDEVICE_VERSION_MINOR, \