[FFmpeg-devel] [PATCH 2/3 v2] avformat/mux: stop delaying writing the header
James Almer
jamrial at gmail.com
Tue Nov 28 04:57:22 EET 2017
Every bitstream filter behaves as intended now, so there's no need to
wait for the first packet of every stream.
Signed-off-by: James Almer <jamrial at gmail.com>
---
Now without overloading ret in avformat_write_header.
libavformat/avformat.h | 2 +-
libavformat/internal.h | 6 -----
libavformat/mux.c | 52 ++++++++----------------------------------
libavformat/options_table.h | 2 +-
libavformat/tests/fifo_muxer.c | 52 ------------------------------------------
tests/ref/fate/fifo-muxer-tst | 1 -
6 files changed, 12 insertions(+), 103 deletions(-)
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 322210fae0..4f2798a871 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -1449,7 +1449,7 @@ typedef struct AVFormatContext {
#endif
#define AVFMT_FLAG_FAST_SEEK 0x80000 ///< Enable fast, but inaccurate seeks for some formats
#define AVFMT_FLAG_SHORTEST 0x100000 ///< Stop muxing when the shortest stream stops.
-#define AVFMT_FLAG_AUTO_BSF 0x200000 ///< Wait for packet data before writing a header, and add bitstream filters as requested by the muxer
+#define AVFMT_FLAG_AUTO_BSF 0x200000 ///< Add bitstream filters as requested by the muxer
/**
* Maximum size of the data read from input for determining
diff --git a/libavformat/internal.h b/libavformat/internal.h
index fcd47840a5..36a57214ce 100644
--- a/libavformat/internal.h
+++ b/libavformat/internal.h
@@ -120,12 +120,6 @@ struct AVFormatInternal {
int avoid_negative_ts_use_pts;
- /**
- * Whether or not a header has already been written
- */
- int header_written;
- int write_header_ret;
-
/**
* Timestamp of the end of the shortest stream.
*/
diff --git a/libavformat/mux.c b/libavformat/mux.c
index b1244c67f3..effcc1152f 100644
--- a/libavformat/mux.c
+++ b/libavformat/mux.c
@@ -458,25 +458,6 @@ static void flush_if_needed(AVFormatContext *s)
}
}
-static int write_header_internal(AVFormatContext *s)
-{
- if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
- avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_HEADER);
- if (s->oformat->write_header) {
- int ret = s->oformat->write_header(s);
- if (ret >= 0 && s->pb && s->pb->error < 0)
- ret = s->pb->error;
- s->internal->write_header_ret = ret;
- if (ret < 0)
- return ret;
- flush_if_needed(s);
- }
- s->internal->header_written = 1;
- if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
- avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_UNKNOWN);
- return 0;
-}
-
int avformat_init_output(AVFormatContext *s, AVDictionary **options)
{
int ret = 0;
@@ -515,11 +496,18 @@ int avformat_write_header(AVFormatContext *s, AVDictionary **options)
if ((ret = avformat_init_output(s, options)) < 0)
return ret;
- if (!(s->oformat->check_bitstream && s->flags & AVFMT_FLAG_AUTO_BSF)) {
- ret = write_header_internal(s);
+ if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
+ avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_HEADER);
+ if (s->oformat->write_header) {
+ ret = s->oformat->write_header(s);
+ if (ret >= 0 && s->pb && s->pb->error < 0)
+ ret = s->pb->error;
if (ret < 0)
goto fail;
+ flush_if_needed(s);
}
+ if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
+ avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_UNKNOWN);
if (!s->internal->streams_initialized) {
if ((ret = init_pts(s)) < 0)
@@ -739,12 +727,6 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
}
}
- if (!s->internal->header_written) {
- ret = s->internal->write_header_ret ? s->internal->write_header_ret : write_header_internal(s);
- if (ret < 0)
- goto fail;
- }
-
if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
AVFrame *frame = (AVFrame *)pkt->data;
av_assert0(pkt->size == UNCODED_FRAME_PACKET_SIZE);
@@ -760,8 +742,6 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
ret = s->pb->error;
}
-fail:
-
if (ret < 0) {
pkt->pts = pts_backup;
pkt->dts = dts_backup;
@@ -894,11 +874,6 @@ int av_write_frame(AVFormatContext *s, AVPacket *pkt)
if (!pkt) {
if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
- if (!s->internal->header_written) {
- ret = s->internal->write_header_ret ? s->internal->write_header_ret : write_header_internal(s);
- if (ret < 0)
- return ret;
- }
ret = s->oformat->write_packet(s, NULL);
flush_if_needed(s);
if (ret >= 0 && s->pb && s->pb->error < 0)
@@ -1282,14 +1257,8 @@ int av_write_trailer(AVFormatContext *s)
goto fail;
}
- if (!s->internal->header_written) {
- ret = s->internal->write_header_ret ? s->internal->write_header_ret : write_header_internal(s);
- if (ret < 0)
- goto fail;
- }
-
fail:
- if (s->internal->header_written && s->oformat->write_trailer) {
+ if (s->oformat->write_trailer) {
if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_TRAILER);
if (ret >= 0) {
@@ -1302,7 +1271,6 @@ fail:
if (s->oformat->deinit)
s->oformat->deinit(s);
- s->internal->header_written =
s->internal->initialized =
s->internal->streams_initialized = 0;
diff --git a/libavformat/options_table.h b/libavformat/options_table.h
index b60d031f67..b8fa47c6fd 100644
--- a/libavformat/options_table.h
+++ b/libavformat/options_table.h
@@ -57,7 +57,7 @@ static const AVOption avformat_options[] = {
{"seek2any", "allow seeking to non-keyframes on demuxer level when supported", OFFSET(seek2any), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, D},
{"bitexact", "do not write random/volatile data", 0, AV_OPT_TYPE_CONST, { .i64 = AVFMT_FLAG_BITEXACT }, 0, 0, E, "fflags" },
{"shortest", "stop muxing with the shortest stream", 0, AV_OPT_TYPE_CONST, { .i64 = AVFMT_FLAG_SHORTEST }, 0, 0, E, "fflags" },
-{"autobsf", "add needed bsfs automatically (delays header until each stream's first packet is written)", 0, AV_OPT_TYPE_CONST, { .i64 = AVFMT_FLAG_AUTO_BSF }, 0, 0, E, "fflags" },
+{"autobsf", "add needed bsfs automatically", 0, AV_OPT_TYPE_CONST, { .i64 = AVFMT_FLAG_AUTO_BSF }, 0, 0, E, "fflags" },
{"analyzeduration", "specify how many microseconds are analyzed to probe the input", OFFSET(max_analyze_duration), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, D},
{"cryptokey", "decryption key", OFFSET(key), AV_OPT_TYPE_BINARY, {.dbl = 0}, 0, 0, D},
{"indexmem", "max memory used for timestamp index (per stream)", OFFSET(max_index_size), AV_OPT_TYPE_INT, {.i64 = 1<<20 }, 0, INT_MAX, D},
diff --git a/libavformat/tests/fifo_muxer.c b/libavformat/tests/fifo_muxer.c
index e20bd6e7b2..4b63df085e 100644
--- a/libavformat/tests/fifo_muxer.c
+++ b/libavformat/tests/fifo_muxer.c
@@ -238,54 +238,6 @@ fail:
return ret;
}
-static int fifo_write_header_err_tst(AVFormatContext *oc, AVDictionary **opts,
- const FailingMuxerPacketData *pkt_data)
-{
- int ret = 0, i;
- AVPacket pkt;
-
- av_init_packet(&pkt);
-
- ret = avformat_write_header(oc, opts);
- if (ret) {
- fprintf(stderr, "Unexpected write_header failure: %s\n",
- av_err2str(ret));
- goto fail;
- }
-
- for (i = 0; i < MAX_TST_PACKETS; i++ ) {
- ret = prepare_packet(&pkt, pkt_data, i);
- if (ret < 0) {
- fprintf(stderr, "Failed to prepare test packet: %s\n",
- av_err2str(ret));
- goto write_trailer_and_fail;
- }
- ret = av_write_frame(oc, &pkt);
- av_packet_unref(&pkt);
- if (ret < 0) {
- break;
- }
- }
-
- if (!ret) {
- fprintf(stderr, "write_packet not failed when supposed to.\n");
- goto fail;
- } else if (ret != -1) {
- fprintf(stderr, "Unexpected write_packet error: %s\n", av_err2str(ret));
- goto fail;
- }
-
- ret = av_write_trailer(oc);
- if (ret < 0)
- fprintf(stderr, "Unexpected write_trailer error: %s\n", av_err2str(ret));
-
- return ret;
-write_trailer_and_fail:
- av_write_trailer(oc);
-fail:
- return ret;
-}
-
static int fifo_overflow_drop_test(AVFormatContext *oc, AVDictionary **opts,
const FailingMuxerPacketData *data)
{
@@ -403,10 +355,6 @@ const TestCase tests[] = {
* exactly what was on input */
{fifo_basic_test, "nonfail test", NULL,1, 0, 0, {0, 0, 0}},
- /* Test that we receive delayed write_header error from one of the write_packet
- * calls. */
- {fifo_write_header_err_tst, "write header error test", NULL, 0, -1, 0, {0, 0, 0}},
-
/* Each write_packet will fail 3 times before operation is successful. If recovery
* Since recovery is on, fifo muxer should not return any errors. */
{fifo_basic_test, "recovery test", "attempt_recovery=1:recovery_wait_time=0",
diff --git a/tests/ref/fate/fifo-muxer-tst b/tests/ref/fate/fifo-muxer-tst
index ca7e294860..e1139ee0a8 100644
--- a/tests/ref/fate/fifo-muxer-tst
+++ b/tests/ref/fate/fifo-muxer-tst
@@ -2,7 +2,6 @@ flush count: 1
pts seen nr: 15
pts seen: 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14
nonfail test: ok
-write header error test: ok
recovery test: ok
flush count: 1
pts seen nr: 15
--
2.15.0
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