711 lines
22 KiB
C
Executable file
711 lines
22 KiB
C
Executable file
/*
|
|
* FIFO pseudo-muxer
|
|
* Copyright (c) 2016 Jan Sebechlebsky
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public License
|
|
* as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with FFmpeg; if not, write to the Free Software * Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include <stdatomic.h>
|
|
|
|
#include "libavutil/avassert.h"
|
|
#include "libavutil/opt.h"
|
|
#include "libavutil/time.h"
|
|
#include "libavutil/thread.h"
|
|
#include "libavutil/threadmessage.h"
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
|
|
#define FIFO_DEFAULT_QUEUE_SIZE 60
|
|
#define FIFO_DEFAULT_MAX_RECOVERY_ATTEMPTS 0
|
|
#define FIFO_DEFAULT_RECOVERY_WAIT_TIME_USEC 5000000 // 5 seconds
|
|
|
|
typedef struct FifoContext {
|
|
const AVClass *class;
|
|
AVFormatContext *avf;
|
|
|
|
char *format;
|
|
AVDictionary *format_options;
|
|
|
|
int queue_size;
|
|
AVThreadMessageQueue *queue;
|
|
|
|
pthread_t writer_thread;
|
|
|
|
/* Return value of last write_trailer_call */
|
|
int write_trailer_ret;
|
|
|
|
/* Time to wait before next recovery attempt
|
|
* This can refer to the time in processed stream,
|
|
* or real time. */
|
|
int64_t recovery_wait_time;
|
|
|
|
/* Maximal number of unsuccessful successive recovery attempts */
|
|
int max_recovery_attempts;
|
|
|
|
/* Whether to attempt recovery from failure */
|
|
int attempt_recovery;
|
|
|
|
/* If >0 stream time will be used when waiting
|
|
* for the recovery attempt instead of real time */
|
|
int recovery_wait_streamtime;
|
|
|
|
/* If >0 recovery will be attempted regardless of error code
|
|
* (except AVERROR_EXIT, so exit request is never ignored) */
|
|
int recover_any_error;
|
|
|
|
/* Whether to drop packets in case the queue is full. */
|
|
int drop_pkts_on_overflow;
|
|
|
|
/* Whether to wait for keyframe when recovering
|
|
* from failure or queue overflow */
|
|
int restart_with_keyframe;
|
|
|
|
pthread_mutex_t overflow_flag_lock;
|
|
int overflow_flag_lock_initialized;
|
|
/* Value > 0 signals queue overflow */
|
|
volatile uint8_t overflow_flag;
|
|
|
|
atomic_int_least64_t queue_duration;
|
|
int64_t last_sent_dts;
|
|
int64_t timeshift;
|
|
} FifoContext;
|
|
|
|
typedef struct FifoThreadContext {
|
|
AVFormatContext *avf;
|
|
|
|
/* Timestamp of last failure.
|
|
* This is either pts in case stream time is used,
|
|
* or microseconds as returned by av_getttime_relative() */
|
|
int64_t last_recovery_ts;
|
|
|
|
/* Number of current recovery process
|
|
* Value > 0 means we are in recovery process */
|
|
int recovery_nr;
|
|
|
|
/* If > 0 all frames will be dropped until keyframe is received */
|
|
uint8_t drop_until_keyframe;
|
|
|
|
/* Value > 0 means that the previous write_header call was successful
|
|
* so finalization by calling write_trailer and ff_io_close must be done
|
|
* before exiting / reinitialization of underlying muxer */
|
|
uint8_t header_written;
|
|
|
|
int64_t last_received_dts;
|
|
} FifoThreadContext;
|
|
|
|
typedef enum FifoMessageType {
|
|
FIFO_NOOP,
|
|
FIFO_WRITE_HEADER,
|
|
FIFO_WRITE_PACKET,
|
|
FIFO_FLUSH_OUTPUT
|
|
} FifoMessageType;
|
|
|
|
typedef struct FifoMessage {
|
|
FifoMessageType type;
|
|
AVPacket pkt;
|
|
} FifoMessage;
|
|
|
|
static int fifo_thread_write_header(FifoThreadContext *ctx)
|
|
{
|
|
AVFormatContext *avf = ctx->avf;
|
|
FifoContext *fifo = avf->priv_data;
|
|
AVFormatContext *avf2 = fifo->avf;
|
|
AVDictionary *format_options = NULL;
|
|
int ret, i;
|
|
|
|
ret = av_dict_copy(&format_options, fifo->format_options, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = ff_format_output_open(avf2, avf->url, &format_options);
|
|
if (ret < 0) {
|
|
av_log(avf, AV_LOG_ERROR, "Error opening %s: %s\n", avf->url,
|
|
av_err2str(ret));
|
|
goto end;
|
|
}
|
|
|
|
for (i = 0;i < avf2->nb_streams; i++)
|
|
avf2->streams[i]->cur_dts = 0;
|
|
|
|
ret = avformat_write_header(avf2, &format_options);
|
|
if (!ret)
|
|
ctx->header_written = 1;
|
|
|
|
// Check for options unrecognized by underlying muxer
|
|
if (format_options) {
|
|
AVDictionaryEntry *entry = NULL;
|
|
while ((entry = av_dict_get(format_options, "", entry, AV_DICT_IGNORE_SUFFIX)))
|
|
av_log(avf2, AV_LOG_ERROR, "Unknown option '%s'\n", entry->key);
|
|
ret = AVERROR(EINVAL);
|
|
}
|
|
|
|
end:
|
|
av_dict_free(&format_options);
|
|
return ret;
|
|
}
|
|
|
|
static int fifo_thread_flush_output(FifoThreadContext *ctx)
|
|
{
|
|
AVFormatContext *avf = ctx->avf;
|
|
FifoContext *fifo = avf->priv_data;
|
|
AVFormatContext *avf2 = fifo->avf;
|
|
|
|
return av_write_frame(avf2, NULL);
|
|
}
|
|
|
|
static int64_t next_duration(AVFormatContext *avf, AVPacket *pkt, int64_t *last_dts)
|
|
{
|
|
AVStream *st = avf->streams[pkt->stream_index];
|
|
int64_t dts = av_rescale_q(pkt->dts, st->time_base, AV_TIME_BASE_Q);
|
|
int64_t duration = (*last_dts == AV_NOPTS_VALUE ? 0 : dts - *last_dts);
|
|
*last_dts = dts;
|
|
return duration;
|
|
}
|
|
|
|
static int fifo_thread_write_packet(FifoThreadContext *ctx, AVPacket *pkt)
|
|
{
|
|
AVFormatContext *avf = ctx->avf;
|
|
FifoContext *fifo = avf->priv_data;
|
|
AVFormatContext *avf2 = fifo->avf;
|
|
AVRational src_tb, dst_tb;
|
|
int ret, s_idx;
|
|
|
|
if (fifo->timeshift && pkt->dts != AV_NOPTS_VALUE)
|
|
atomic_fetch_sub_explicit(&fifo->queue_duration, next_duration(avf, pkt, &ctx->last_received_dts), memory_order_relaxed);
|
|
|
|
if (ctx->drop_until_keyframe) {
|
|
if (pkt->flags & AV_PKT_FLAG_KEY) {
|
|
ctx->drop_until_keyframe = 0;
|
|
av_log(avf, AV_LOG_VERBOSE, "Keyframe received, recovering...\n");
|
|
} else {
|
|
av_log(avf, AV_LOG_VERBOSE, "Dropping non-keyframe packet\n");
|
|
av_packet_unref(pkt);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
s_idx = pkt->stream_index;
|
|
src_tb = avf->streams[s_idx]->time_base;
|
|
dst_tb = avf2->streams[s_idx]->time_base;
|
|
av_packet_rescale_ts(pkt, src_tb, dst_tb);
|
|
|
|
ret = av_write_frame(avf2, pkt);
|
|
if (ret >= 0)
|
|
av_packet_unref(pkt);
|
|
return ret;
|
|
}
|
|
|
|
static int fifo_thread_write_trailer(FifoThreadContext *ctx)
|
|
{
|
|
AVFormatContext *avf = ctx->avf;
|
|
FifoContext *fifo = avf->priv_data;
|
|
AVFormatContext *avf2 = fifo->avf;
|
|
int ret;
|
|
|
|
if (!ctx->header_written)
|
|
return 0;
|
|
|
|
ret = av_write_trailer(avf2);
|
|
ff_format_io_close(avf2, &avf2->pb);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int fifo_thread_dispatch_message(FifoThreadContext *ctx, FifoMessage *msg)
|
|
{
|
|
int ret = AVERROR(EINVAL);
|
|
|
|
if (msg->type == FIFO_NOOP)
|
|
return 0;
|
|
|
|
if (!ctx->header_written) {
|
|
ret = fifo_thread_write_header(ctx);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
switch(msg->type) {
|
|
case FIFO_WRITE_HEADER:
|
|
av_assert0(ret >= 0);
|
|
return ret;
|
|
case FIFO_WRITE_PACKET:
|
|
return fifo_thread_write_packet(ctx, &msg->pkt);
|
|
case FIFO_FLUSH_OUTPUT:
|
|
return fifo_thread_flush_output(ctx);
|
|
}
|
|
|
|
av_assert0(0);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
static int is_recoverable(const FifoContext *fifo, int err_no) {
|
|
if (!fifo->attempt_recovery)
|
|
return 0;
|
|
|
|
if (fifo->recover_any_error)
|
|
return err_no != AVERROR_EXIT;
|
|
|
|
switch (err_no) {
|
|
case AVERROR(EINVAL):
|
|
case AVERROR(ENOSYS):
|
|
case AVERROR_EOF:
|
|
case AVERROR_EXIT:
|
|
case AVERROR_PATCHWELCOME:
|
|
return 0;
|
|
default:
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
static void free_message(void *msg)
|
|
{
|
|
FifoMessage *fifo_msg = msg;
|
|
|
|
if (fifo_msg->type == FIFO_WRITE_PACKET)
|
|
av_packet_unref(&fifo_msg->pkt);
|
|
}
|
|
|
|
static int fifo_thread_process_recovery_failure(FifoThreadContext *ctx, AVPacket *pkt,
|
|
int err_no)
|
|
{
|
|
AVFormatContext *avf = ctx->avf;
|
|
FifoContext *fifo = avf->priv_data;
|
|
int ret;
|
|
|
|
av_log(avf, AV_LOG_INFO, "Recovery failed: %s\n",
|
|
av_err2str(err_no));
|
|
|
|
if (fifo->recovery_wait_streamtime) {
|
|
if (pkt->pts == AV_NOPTS_VALUE)
|
|
av_log(avf, AV_LOG_WARNING, "Packet does not contain presentation"
|
|
" timestamp, recovery will be attempted immediately");
|
|
ctx->last_recovery_ts = pkt->pts;
|
|
} else {
|
|
ctx->last_recovery_ts = av_gettime_relative();
|
|
}
|
|
|
|
if (fifo->max_recovery_attempts &&
|
|
ctx->recovery_nr >= fifo->max_recovery_attempts) {
|
|
av_log(avf, AV_LOG_ERROR,
|
|
"Maximal number of %d recovery attempts reached.\n",
|
|
fifo->max_recovery_attempts);
|
|
ret = err_no;
|
|
} else {
|
|
ret = AVERROR(EAGAIN);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int fifo_thread_attempt_recovery(FifoThreadContext *ctx, FifoMessage *msg, int err_no)
|
|
{
|
|
AVFormatContext *avf = ctx->avf;
|
|
FifoContext *fifo = avf->priv_data;
|
|
AVPacket *pkt = &msg->pkt;
|
|
int64_t time_since_recovery;
|
|
int ret;
|
|
|
|
if (!is_recoverable(fifo, err_no)) {
|
|
ret = err_no;
|
|
goto fail;
|
|
}
|
|
|
|
if (ctx->header_written) {
|
|
fifo->write_trailer_ret = fifo_thread_write_trailer(ctx);
|
|
ctx->header_written = 0;
|
|
}
|
|
|
|
if (!ctx->recovery_nr) {
|
|
ctx->last_recovery_ts = fifo->recovery_wait_streamtime ?
|
|
AV_NOPTS_VALUE : 0;
|
|
} else {
|
|
if (fifo->recovery_wait_streamtime) {
|
|
if (ctx->last_recovery_ts == AV_NOPTS_VALUE) {
|
|
AVRational tb = avf->streams[pkt->stream_index]->time_base;
|
|
time_since_recovery = av_rescale_q(pkt->pts - ctx->last_recovery_ts,
|
|
tb, AV_TIME_BASE_Q);
|
|
} else {
|
|
/* Enforce recovery immediately */
|
|
time_since_recovery = fifo->recovery_wait_time;
|
|
}
|
|
} else {
|
|
time_since_recovery = av_gettime_relative() - ctx->last_recovery_ts;
|
|
}
|
|
|
|
if (time_since_recovery < fifo->recovery_wait_time)
|
|
return AVERROR(EAGAIN);
|
|
}
|
|
|
|
ctx->recovery_nr++;
|
|
|
|
if (fifo->max_recovery_attempts) {
|
|
av_log(avf, AV_LOG_VERBOSE, "Recovery attempt #%d/%d\n",
|
|
ctx->recovery_nr, fifo->max_recovery_attempts);
|
|
} else {
|
|
av_log(avf, AV_LOG_VERBOSE, "Recovery attempt #%d\n",
|
|
ctx->recovery_nr);
|
|
}
|
|
|
|
if (fifo->restart_with_keyframe && fifo->drop_pkts_on_overflow)
|
|
ctx->drop_until_keyframe = 1;
|
|
|
|
ret = fifo_thread_dispatch_message(ctx, msg);
|
|
if (ret < 0) {
|
|
if (is_recoverable(fifo, ret)) {
|
|
return fifo_thread_process_recovery_failure(ctx, pkt, ret);
|
|
} else {
|
|
goto fail;
|
|
}
|
|
} else {
|
|
av_log(avf, AV_LOG_INFO, "Recovery successful\n");
|
|
ctx->recovery_nr = 0;
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
free_message(msg);
|
|
return ret;
|
|
}
|
|
|
|
static int fifo_thread_recover(FifoThreadContext *ctx, FifoMessage *msg, int err_no)
|
|
{
|
|
AVFormatContext *avf = ctx->avf;
|
|
FifoContext *fifo = avf->priv_data;
|
|
int ret;
|
|
|
|
do {
|
|
if (!fifo->recovery_wait_streamtime && ctx->recovery_nr > 0) {
|
|
int64_t time_since_recovery = av_gettime_relative() - ctx->last_recovery_ts;
|
|
int64_t time_to_wait = FFMAX(0, fifo->recovery_wait_time - time_since_recovery);
|
|
if (time_to_wait)
|
|
av_usleep(FFMIN(10000, time_to_wait));
|
|
}
|
|
|
|
ret = fifo_thread_attempt_recovery(ctx, msg, err_no);
|
|
} while (ret == AVERROR(EAGAIN) && !fifo->drop_pkts_on_overflow);
|
|
|
|
if (ret == AVERROR(EAGAIN) && fifo->drop_pkts_on_overflow) {
|
|
if (msg->type == FIFO_WRITE_PACKET)
|
|
av_packet_unref(&msg->pkt);
|
|
ret = 0;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void *fifo_consumer_thread(void *data)
|
|
{
|
|
AVFormatContext *avf = data;
|
|
FifoContext *fifo = avf->priv_data;
|
|
AVThreadMessageQueue *queue = fifo->queue;
|
|
FifoMessage msg = {fifo->timeshift ? FIFO_NOOP : FIFO_WRITE_HEADER, {0}};
|
|
int ret;
|
|
|
|
FifoThreadContext fifo_thread_ctx;
|
|
memset(&fifo_thread_ctx, 0, sizeof(FifoThreadContext));
|
|
fifo_thread_ctx.avf = avf;
|
|
fifo_thread_ctx.last_received_dts = AV_NOPTS_VALUE;
|
|
|
|
while (1) {
|
|
uint8_t just_flushed = 0;
|
|
|
|
if (!fifo_thread_ctx.recovery_nr)
|
|
ret = fifo_thread_dispatch_message(&fifo_thread_ctx, &msg);
|
|
|
|
if (ret < 0 || fifo_thread_ctx.recovery_nr > 0) {
|
|
int rec_ret = fifo_thread_recover(&fifo_thread_ctx, &msg, ret);
|
|
if (rec_ret < 0) {
|
|
av_thread_message_queue_set_err_send(queue, rec_ret);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* If the queue is full at the moment when fifo_write_packet
|
|
* attempts to insert new message (packet) to the queue,
|
|
* it sets the fifo->overflow_flag to 1 and drops packet.
|
|
* Here in consumer thread, the flag is checked and if it is
|
|
* set, the queue is flushed and flag cleared. */
|
|
pthread_mutex_lock(&fifo->overflow_flag_lock);
|
|
if (fifo->overflow_flag) {
|
|
av_thread_message_flush(queue);
|
|
if (fifo->restart_with_keyframe)
|
|
fifo_thread_ctx.drop_until_keyframe = 1;
|
|
fifo->overflow_flag = 0;
|
|
just_flushed = 1;
|
|
}
|
|
pthread_mutex_unlock(&fifo->overflow_flag_lock);
|
|
|
|
if (just_flushed)
|
|
av_log(avf, AV_LOG_INFO, "FIFO queue flushed\n");
|
|
|
|
if (fifo->timeshift)
|
|
while (atomic_load_explicit(&fifo->queue_duration, memory_order_relaxed) < fifo->timeshift)
|
|
av_usleep(10000);
|
|
|
|
ret = av_thread_message_queue_recv(queue, &msg, 0);
|
|
if (ret < 0) {
|
|
av_thread_message_queue_set_err_send(queue, ret);
|
|
break;
|
|
}
|
|
}
|
|
|
|
fifo->write_trailer_ret = fifo_thread_write_trailer(&fifo_thread_ctx);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int fifo_mux_init(AVFormatContext *avf, ff_const59 AVOutputFormat *oformat,
|
|
const char *filename)
|
|
{
|
|
FifoContext *fifo = avf->priv_data;
|
|
AVFormatContext *avf2;
|
|
int ret = 0, i;
|
|
|
|
ret = avformat_alloc_output_context2(&avf2, oformat, NULL, filename);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
fifo->avf = avf2;
|
|
|
|
avf2->interrupt_callback = avf->interrupt_callback;
|
|
avf2->max_delay = avf->max_delay;
|
|
ret = av_dict_copy(&avf2->metadata, avf->metadata, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
avf2->opaque = avf->opaque;
|
|
avf2->io_close = avf->io_close;
|
|
avf2->io_open = avf->io_open;
|
|
avf2->flags = avf->flags;
|
|
|
|
for (i = 0; i < avf->nb_streams; ++i) {
|
|
AVStream *st = avformat_new_stream(avf2, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
ret = ff_stream_encode_params_copy(st, avf->streams[i]);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fifo_init(AVFormatContext *avf)
|
|
{
|
|
FifoContext *fifo = avf->priv_data;
|
|
ff_const59 AVOutputFormat *oformat;
|
|
int ret = 0;
|
|
|
|
if (fifo->recovery_wait_streamtime && !fifo->drop_pkts_on_overflow) {
|
|
av_log(avf, AV_LOG_ERROR, "recovery_wait_streamtime can be turned on"
|
|
" only when drop_pkts_on_overflow is also turned on\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
atomic_init(&fifo->queue_duration, 0);
|
|
fifo->last_sent_dts = AV_NOPTS_VALUE;
|
|
|
|
oformat = av_guess_format(fifo->format, avf->url, NULL);
|
|
if (!oformat) {
|
|
ret = AVERROR_MUXER_NOT_FOUND;
|
|
return ret;
|
|
}
|
|
|
|
ret = fifo_mux_init(avf, oformat, avf->url);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = av_thread_message_queue_alloc(&fifo->queue, (unsigned) fifo->queue_size,
|
|
sizeof(FifoMessage));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
av_thread_message_queue_set_free_func(fifo->queue, free_message);
|
|
|
|
ret = pthread_mutex_init(&fifo->overflow_flag_lock, NULL);
|
|
if (ret < 0)
|
|
return AVERROR(ret);
|
|
fifo->overflow_flag_lock_initialized = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fifo_write_header(AVFormatContext *avf)
|
|
{
|
|
FifoContext * fifo = avf->priv_data;
|
|
int ret;
|
|
|
|
ret = pthread_create(&fifo->writer_thread, NULL, fifo_consumer_thread, avf);
|
|
if (ret) {
|
|
av_log(avf, AV_LOG_ERROR, "Failed to start thread: %s\n",
|
|
av_err2str(AVERROR(ret)));
|
|
ret = AVERROR(ret);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int fifo_write_packet(AVFormatContext *avf, AVPacket *pkt)
|
|
{
|
|
FifoContext *fifo = avf->priv_data;
|
|
FifoMessage msg = {.type = pkt ? FIFO_WRITE_PACKET : FIFO_FLUSH_OUTPUT};
|
|
int ret;
|
|
|
|
if (pkt) {
|
|
ret = av_packet_ref(&msg.pkt,pkt);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
ret = av_thread_message_queue_send(fifo->queue, &msg,
|
|
fifo->drop_pkts_on_overflow ?
|
|
AV_THREAD_MESSAGE_NONBLOCK : 0);
|
|
if (ret == AVERROR(EAGAIN)) {
|
|
uint8_t overflow_set = 0;
|
|
|
|
/* Queue is full, set fifo->overflow_flag to 1
|
|
* to let consumer thread know the queue should
|
|
* be flushed. */
|
|
pthread_mutex_lock(&fifo->overflow_flag_lock);
|
|
if (!fifo->overflow_flag)
|
|
fifo->overflow_flag = overflow_set = 1;
|
|
pthread_mutex_unlock(&fifo->overflow_flag_lock);
|
|
|
|
if (overflow_set)
|
|
av_log(avf, AV_LOG_WARNING, "FIFO queue full\n");
|
|
ret = 0;
|
|
goto fail;
|
|
} else if (ret < 0) {
|
|
goto fail;
|
|
}
|
|
|
|
if (fifo->timeshift && pkt->dts != AV_NOPTS_VALUE)
|
|
atomic_fetch_add_explicit(&fifo->queue_duration, next_duration(avf, pkt, &fifo->last_sent_dts), memory_order_relaxed);
|
|
|
|
return ret;
|
|
fail:
|
|
if (pkt)
|
|
av_packet_unref(&msg.pkt);
|
|
return ret;
|
|
}
|
|
|
|
static int fifo_write_trailer(AVFormatContext *avf)
|
|
{
|
|
FifoContext *fifo= avf->priv_data;
|
|
int ret;
|
|
|
|
av_thread_message_queue_set_err_recv(fifo->queue, AVERROR_EOF);
|
|
if (fifo->timeshift) {
|
|
int64_t now = av_gettime_relative();
|
|
int64_t elapsed = 0;
|
|
FifoMessage msg = {FIFO_NOOP};
|
|
do {
|
|
int64_t delay = av_gettime_relative() - now;
|
|
if (delay < 0) { // Discontinuity?
|
|
delay = 10000;
|
|
now = av_gettime_relative();
|
|
} else {
|
|
now += delay;
|
|
}
|
|
atomic_fetch_add_explicit(&fifo->queue_duration, delay, memory_order_relaxed);
|
|
elapsed += delay;
|
|
if (elapsed > fifo->timeshift)
|
|
break;
|
|
av_usleep(10000);
|
|
ret = av_thread_message_queue_send(fifo->queue, &msg, AV_THREAD_MESSAGE_NONBLOCK);
|
|
} while (ret >= 0 || ret == AVERROR(EAGAIN));
|
|
atomic_store(&fifo->queue_duration, INT64_MAX);
|
|
}
|
|
|
|
ret = pthread_join(fifo->writer_thread, NULL);
|
|
if (ret < 0) {
|
|
av_log(avf, AV_LOG_ERROR, "pthread join error: %s\n",
|
|
av_err2str(AVERROR(ret)));
|
|
return AVERROR(ret);
|
|
}
|
|
|
|
ret = fifo->write_trailer_ret;
|
|
return ret;
|
|
}
|
|
|
|
static void fifo_deinit(AVFormatContext *avf)
|
|
{
|
|
FifoContext *fifo = avf->priv_data;
|
|
|
|
avformat_free_context(fifo->avf);
|
|
av_thread_message_queue_free(&fifo->queue);
|
|
if (fifo->overflow_flag_lock_initialized)
|
|
pthread_mutex_destroy(&fifo->overflow_flag_lock);
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(FifoContext, x)
|
|
static const AVOption options[] = {
|
|
{"fifo_format", "Target muxer", OFFSET(format),
|
|
AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, AV_OPT_FLAG_ENCODING_PARAM},
|
|
|
|
{"queue_size", "Size of fifo queue", OFFSET(queue_size),
|
|
AV_OPT_TYPE_INT, {.i64 = FIFO_DEFAULT_QUEUE_SIZE}, 1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
|
|
|
|
{"format_opts", "Options to be passed to underlying muxer", OFFSET(format_options),
|
|
AV_OPT_TYPE_DICT, {.str = NULL}, 0, 0, AV_OPT_FLAG_ENCODING_PARAM},
|
|
|
|
{"drop_pkts_on_overflow", "Drop packets on fifo queue overflow not to block encoder", OFFSET(drop_pkts_on_overflow),
|
|
AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
|
|
|
|
{"restart_with_keyframe", "Wait for keyframe when restarting output", OFFSET(restart_with_keyframe),
|
|
AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
|
|
|
|
{"attempt_recovery", "Attempt recovery in case of failure", OFFSET(attempt_recovery),
|
|
AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
|
|
|
|
{"max_recovery_attempts", "Maximal number of recovery attempts", OFFSET(max_recovery_attempts),
|
|
AV_OPT_TYPE_INT, {.i64 = FIFO_DEFAULT_MAX_RECOVERY_ATTEMPTS}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
|
|
|
|
{"recovery_wait_time", "Waiting time between recovery attempts", OFFSET(recovery_wait_time),
|
|
AV_OPT_TYPE_DURATION, {.i64 = FIFO_DEFAULT_RECOVERY_WAIT_TIME_USEC}, 0, INT64_MAX, AV_OPT_FLAG_ENCODING_PARAM},
|
|
|
|
{"recovery_wait_streamtime", "Use stream time instead of real time while waiting for recovery",
|
|
OFFSET(recovery_wait_streamtime), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
|
|
|
|
{"recover_any_error", "Attempt recovery regardless of type of the error", OFFSET(recover_any_error),
|
|
AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
|
|
|
|
{"timeshift", "Delay fifo output", OFFSET(timeshift),
|
|
AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX, AV_OPT_FLAG_ENCODING_PARAM},
|
|
|
|
{NULL},
|
|
};
|
|
|
|
static const AVClass fifo_muxer_class = {
|
|
.class_name = "Fifo muxer",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVOutputFormat ff_fifo_muxer = {
|
|
.name = "fifo",
|
|
.long_name = NULL_IF_CONFIG_SMALL("FIFO queue pseudo-muxer"),
|
|
.priv_data_size = sizeof(FifoContext),
|
|
.init = fifo_init,
|
|
.write_header = fifo_write_header,
|
|
.write_packet = fifo_write_packet,
|
|
.write_trailer = fifo_write_trailer,
|
|
.deinit = fifo_deinit,
|
|
.priv_class = &fifo_muxer_class,
|
|
.flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH | AVFMT_TS_NEGATIVE,
|
|
};
|