From: Karthick Jeyapal <kjeya...@akamai.com>
---
libavformat/dashenc.c | 67 +++++++++++++++++++++++++++++++++++++++++----------
1 file changed, 54 insertions(+), 13 deletions(-)
diff --git a/libavformat/dashenc.c b/libavformat/dashenc.c
index 5687530..e7d1a0d 100644
--- a/libavformat/dashenc.c
+++ b/libavformat/dashenc.c
@@ -37,6 +37,9 @@
#include "avformat.h"
#include "avio_internal.h"
#include "hlsplaylist.h"
+#if CONFIG_HTTP_PROTOCOL
+#include "http.h"
+#endif
#include "internal.h"
#include "isom.h"
#include "os_support.h"
@@ -103,7 +106,10 @@ typedef struct DASHContext {
const char *utc_timing_url;
const char *user_agent;
int hls_playlist;
+ int http_persistent;
int master_playlist_created;
+ AVIOContext *mpd_out;
+ AVIOContext *m3u8_out;
} DASHContext;
static struct codec_string {
@@ -117,6 +123,36 @@ static struct codec_string {
{ 0, NULL }
};
+static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
+ AVDictionary **options) {
+ DASHContext *c = s->priv_data;
+ int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
+ int err = AVERROR_MUXER_NOT_FOUND;
+ if (!*pb || !http_base_proto || !c->http_persistent) {
+ err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
+#if CONFIG_HTTP_PROTOCOL
+ } else {
+ URLContext *http_url_context = ffio_geturlcontext(*pb);
+ av_assert0(http_url_context);
+ err = ff_http_do_new_request(http_url_context, filename);
+#endif
+ }
+ return err;
+}
+
+static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char
*filename) {
+ DASHContext *c = s->priv_data;
+ int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
+
+ if (!http_base_proto || !c->http_persistent) {
+ ff_format_io_close(s, pb);
+#if CONFIG_HTTP_PROTOCOL
+ } else {
+ avio_flush(*pb);
+#endif
+ }
+}
+
static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
char *str, int size)
{
@@ -218,6 +254,8 @@ static void set_http_options(AVDictionary **options,
DASHContext *c)
{
if (c->user_agent)
av_dict_set(options, "user_agent", c->user_agent, 0);
+ if (c->http_persistent)
+ av_dict_set_int(options, "multiple_requests", 1, 0);
}
static void get_hls_playlist_name(char *playlist_name, int string_size,
@@ -273,9 +311,10 @@ static void dash_free(AVFormatContext *s)
av_freep(&c->streams);
}
-static void output_segment_list(OutputStream *os, AVIOContext *out, DASHContext *c,
+static void output_segment_list(OutputStream *os, AVIOContext *out,
AVFormatContext *s,
int representation_id, int final)
{
+ DASHContext *c = s->priv_data;
int i, start_index = 0, start_number = 1;
if (c->window_size) {
start_index = FFMAX(os->nb_segments - c->window_size, 0);
@@ -339,7 +378,6 @@ static void output_segment_list(OutputStream *os,
AVIOContext *out, DASHContext
int timescale = os->ctx->streams[0]->time_base.den;
char temp_filename_hls[1024];
char filename_hls[1024];
- AVIOContext *out_hls = NULL;
AVDictionary *http_opts = NULL;
int target_duration = 0;
int ret = 0;
@@ -352,7 +390,7 @@ static void output_segment_list(OutputStream *os,
AVIOContext *out, DASHContext
snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" :
"%s", filename_hls);
set_http_options(&http_opts, c);
- avio_open2(&out_hls, temp_filename_hls, AVIO_FLAG_WRITE, NULL,
&http_opts);
+ dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
av_dict_free(&http_opts);
for (i = start_index; i < os->nb_segments; i++) {
Segment *seg = os->segments[i];
@@ -361,15 +399,15 @@ static void output_segment_list(OutputStream *os,
AVIOContext *out, DASHContext
target_duration = hls_get_int_from_double(duration);
}
- ff_hls_write_playlist_header(out_hls, 6, -1, target_duration,
+ ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
start_number, PLAYLIST_TYPE_NONE);
- ff_hls_write_init_file(out_hls, os->initfile, c->single_file,
+ ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
os->init_range_length, os->init_start_pos);
for (i = start_index; i < os->nb_segments; i++) {
Segment *seg = os->segments[i];
- ret = ff_hls_write_file_entry(out_hls, 0, c->single_file,
+ ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
(double) seg->duration / timescale, 0,
seg->range_length, seg->start_pos, NULL,
c->single_file ? os->initfile : seg->file,
@@ -380,9 +418,10 @@ static void output_segment_list(OutputStream *os,
AVIOContext *out, DASHContext
}
if (final)
- ff_hls_write_end_list(out_hls);
+ ff_hls_write_end_list(c->m3u8_out);
+
+ dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
- avio_close(out_hls);
if (use_rename)
if (avpriv_io_move(temp_filename_hls, filename_hls) < 0) {
av_log(os->ctx, AV_LOG_WARNING, "renaming file %s to %s
failed\n\n", temp_filename_hls, filename_hls);
@@ -498,7 +537,7 @@ static int write_adaptation_set(AVFormatContext *s,
AVIOContext *out, int as_ind
avio_printf(out, "\t\t\t\t<AudioChannelConfiguration
schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\"
/>\n",
s->streams[i]->codecpar->channels);
}
- output_segment_list(os, out, c, i, final);
+ output_segment_list(os, out, s, i, final);
avio_printf(out, "\t\t\t</Representation>\n");
}
avio_printf(out, "\t\t</AdaptationSet>\n");
@@ -657,11 +696,12 @@ static int write_manifest(AVFormatContext *s, int final)
snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->filename);
set_http_options(&opts, c);
- ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, &opts);
+ ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n",
temp_filename);
return ret;
}
+ out = c->mpd_out;
av_dict_free(&opts);
avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
avio_printf(out, "<MPD
xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n";
@@ -728,7 +768,7 @@ static int write_manifest(AVFormatContext *s, int final)
avio_printf(out, "</MPD>\n");
avio_flush(out);
- ff_format_io_close(s, &out);
+ dashenc_io_close(s, &c->mpd_out, temp_filename);
if (use_rename) {
if ((ret = avpriv_io_move(temp_filename, s->filename)) < 0)
@@ -1094,7 +1134,7 @@ static int dash_flush(AVFormatContext *s, int final, int
stream)
snprintf(full_path, sizeof(full_path), "%s%s", c->dirname,
filename);
snprintf(temp_path, sizeof(temp_path), use_rename ? "%s.tmp" :
"%s", full_path);
set_http_options(&opts, c);
- ret = s->io_open(s, &os->out, temp_path, AVIO_FLAG_WRITE, &opts);
+ ret = dashenc_io_open(s, &os->out, temp_path, &opts);
if (ret < 0)
break;
av_dict_free(&opts);
@@ -1112,7 +1152,7 @@ static int dash_flush(AVFormatContext *s, int final, int
stream)
if (c->single_file) {
find_index_range(s, full_path, os->pos, &index_length);
} else {
- ff_format_io_close(s, &os->out);
+ dashenc_io_close(s, &os->out, temp_path);
if (use_rename) {
ret = avpriv_io_move(temp_path, full_path);
@@ -1309,6 +1349,7 @@ static const AVOption options[] = {
{ "media_seg_name", "DASH-templated name to used for the media segments",
OFFSET(media_seg_name), AV_OPT_TYPE_STRING, {.str =
"chunk-stream$RepresentationID$-$Number%05d$.m4s"}, 0, 0, E },
{ "utc_timing_url", "URL of the page that will return the UTC timestamp in ISO
format", OFFSET(utc_timing_url), AV_OPT_TYPE_STRING, { 0 }, 0, 0, E },
{ "http_user_agent", "override User-Agent field in HTTP header",
OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
+ { "http_persistent", "Use persistent HTTP connections",
OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
