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Code Issues Releases Activity

avformat/dashenc: Persistent HTTP connections supported as an option

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Reviewed-by: Aman Gupta <aman@tmm1.net>
Reviewed-by: Steven Liu <lq@onvideo.cn>
This commit is contained in:
Karthick Jeyapal 2017-12-29 18:12:32 +08:00 committed by Steven Liu
parent e8f71ef338
commit 0c78b6a416
2 changed files with 56 additions and 13 deletions
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2
doc/muxers.texi
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@ -249,6 +249,8 @@ DASH-templated name to used for the media segments. Default is "chunk-stream$Rep
URL of the page that will return the UTC timestamp in ISO format. Example: "https://time.akamai.com/?iso"
@item -http_user_agent @var{user_agent}
Override User-Agent field in HTTP header. Applicable only for HTTP output.
@item -http_persistent @var{http_persistent}
Use persistent HTTP connections. Applicable only for HTTP output.
@item -hls_playlist @var{hls_playlist}
Generate HLS playlist files as well. The master playlist is generated with the filename master.m3u8.
One media playlist file is generated for each stream with filenames media_0.m3u8, media_1.m3u8, etc.

67
libavformat/dashenc.c
View File

@ -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 = lrint(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)
@ -1115,7 +1155,7 @@ 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);
@ -1133,7 +1173,7 @@ 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);
@ -1330,6 +1370,7 @@ 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 },
{ "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
{ NULL },
};