73 if (!duration || atof(duration->
value) < 0)
continue;
74 if (atof(duration->
value) > max) max = atof(duration->
value);
83 double min_buffer_time = 1.0;
84 avio_printf(pb,
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
86 avio_printf(pb,
" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n");
87 avio_printf(pb,
" xmlns=\"urn:mpeg:DASH:schema:MPD:2011\"\n");
88 avio_printf(pb,
" xsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011\"\n");
91 avio_printf(pb,
" mediaPresentationDuration=\"PT%gS\"\n",
94 avio_printf(pb,
" minBufferTime=\"PT%gS\"\n", min_buffer_time);
96 w->
is_live ?
"urn:mpeg:dash:profile:isoff-live:2011" :
"urn:webm:dash:profile:webm-on-demand:2012",
99 time_t local_time = time(
NULL);
100 struct tm gmt_buffer;
101 struct tm *gmt =
gmtime_r(&local_time, &gmt_buffer);
103 if (!strftime(gmt_iso, 21,
"%Y-%m-%dT%H:%M:%SZ", gmt)) {
109 avio_printf(pb,
" availabilityStartTime=\"%s\"\n", gmt_iso);
115 avio_printf(pb,
" schemeIdUri=\"urn:mpeg:dash:utc:http-iso:2014\"\n");
136 if (!ts || strncmp(gold->
value, ts->
value, strlen(gold->
value)))
return 0;
148 if (!gold_track_num)
return 0;
155 strncmp(gold_track_num->
value, track_num->
value, strlen(gold_track_num->
value)) ||
170 int output_width,
int output_height,
171 int output_sample_rate)
177 const char *bandwidth_str;
180 bandwidth_str = bandwidth->
value;
187 avio_printf(pb,
" bandwidth=\"%s\"", bandwidth_str);
208 if (!irange || !cues_start || !cues_end || !filename)
256 int first_sample_rate,
i;
269 for (i = 0; i < w->
nb_as; i++) {
288 *underscore_pos = strrchr(filename,
'_');
289 if (!*underscore_pos)
291 *period_pos = strchr(*underscore_pos,
'.');
309 static const char boolean[2][6] = {
"false",
"true" };
310 int subsegmentStartsWithSAP = 1;
316 int width_in_as = 1, height_in_as = 1, sample_rate_in_as = 1;
348 if (!w->
is_live && (!kf || !strncmp(kf->
value,
"0", 1))) subsegmentStartsWithSAP = 0;
350 avio_printf(pb,
" subsegmentStartsWithSAP=\"%d\"", subsegmentStartsWithSAP);
356 char *underscore_pos, *period_pos;
362 *underscore_pos =
'\0';
363 avio_printf(pb,
"<ContentComponent id=\"1\" type=\"%s\"/>\n",
368 avio_printf(pb,
" media=\"%s_$RepresentationID$_$Number$.chk\"",
371 avio_printf(pb,
" initialization=\"%s_$RepresentationID$.hdr\"",
374 *underscore_pos =
'_';
378 char buf[25], *representation_id = buf, *underscore_pos, *period_pos;
389 representation_id = underscore_pos + 1;
395 !height_in_as, !sample_rate_in_as);
409 enum { new_set, parsed_id, parsing_streams }
state;
418 if (state == new_set)
422 }
else if (state == new_set && *p ==
' ') {
425 }
else if (state == new_set && !strncmp(p,
"id=", 3)) {
436 comma = strchr(p,
',');
437 if (!comma || comma - p >=
sizeof(w->
as[w->
nb_as - 1].
id)) {
441 while (*p !=
',') *q++ = *p++;
445 }
else if (state == parsed_id && !strncmp(p,
"streams=", 8)) {
447 state = parsing_streams;
448 }
else if (state == parsing_streams) {
455 num = strtoll(p, &q, 10);
456 if (!
av_isdigit(*p) || (*q !=
' ' && *q !=
'\0' && *q !=
',') ||
462 if (*q ==
'\0')
break;
463 if (*q ==
' ') state = new_set;
479 for (
unsigned i = 0; i < s->
nb_streams; i++) {
501 for (i = 0; i < w->
nb_as; i++) {
512 return ret < 0 ? ret : 0;
520 #define OFFSET(x) offsetof(WebMDashMuxContext, x) 522 {
"adaptation_sets",
"Adaptation sets. Syntax: id=0,streams=0,1,2 id=1,streams=3,4 and so on",
OFFSET(adaptation_sets),
AV_OPT_TYPE_STRING, { 0 }, 0, 0,
AV_OPT_FLAG_ENCODING_PARAM },
525 {
"chunk_duration_ms",
"duration of each chunk (in milliseconds)",
OFFSET(chunk_duration),
AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
526 {
"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, AV_OPT_FLAG_ENCODING_PARAM },
527 {
"time_shift_buffer_depth",
"Smallest time (in seconds) shifting buffer for which any Representation is guaranteed to be available.",
OFFSET(time_shift_buffer_depth),
AV_OPT_TYPE_DOUBLE, { .dbl = 60.0 }, 1.0, DBL_MAX, AV_OPT_FLAG_ENCODING_PARAM },
528 {
"minimum_update_period",
"Minimum Update Period (in seconds) of the manifest.",
OFFSET(minimum_update_period),
AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
540 .
name =
"webm_dash_manifest",
542 .mime_type =
"application/xml",
547 .priv_class = &webm_dash_class,
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
static av_const int av_isdigit(int c)
Locale-independent conversion of ASCII isdigit.
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
#define LIBAVUTIL_VERSION_INT
#define INITIALIZATION_RANGE
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
const char * av_default_item_name(void *ptr)
Return the context name.
static int subsegment_alignment(AVFormatContext *s, const AdaptationSet *as)
This struct describes the properties of an encoded stream.
AVOutputFormat ff_webm_dash_manifest_muxer
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
AVStream ** streams
A list of all streams in the file.
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
int flags
Flags modifying the (de)muxer behaviour.
#define AVERROR_EOF
End of file.
#define AV_OPT_FLAG_ENCODING_PARAM
a generic parameter which can be set by the user for muxing or encoding
AVCodecID
Identify the syntax and semantics of the bitstream.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static int check_matching_width(AVFormatContext *s, const AdaptationSet *as)
static const AVOption options[]
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
static int webm_dash_manifest_write_packet(AVFormatContext *s, AVPacket *pkt)
enum AVMediaType codec_type
General type of the encoded data.
static int write_representation(AVFormatContext *s, AVStream *st, char *id, int output_width, int output_height, int output_sample_rate)
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
int extradata_size
Size of the extradata content in bytes.
static int webm_dash_manifest_write_header(AVFormatContext *s)
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Allocate, reallocate, or free an array through a pointer to a pointer.
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
static int write_header(AVFormatContext *s)
double time_shift_buffer_depth
static void write_footer(AVFormatContext *s)
static double get_duration(AVFormatContext *s)
static int split_filename(char *filename, char **underscore_pos, char **period_pos)
static const char * get_codec_name(int codec_id)
AVIOContext * pb
I/O context.
Describe the class of an AVClass context structure.
const char * name
Name of the codec described by this descriptor.
static void free_adaptation_sets(AVFormatContext *s)
static int bitstream_switching(AVFormatContext *s, const AdaptationSet *as)
int sample_rate
Audio only.
static int check_matching_height(AVFormatContext *s, const AdaptationSet *as)
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
void * priv_data
Format private data.
static const AVClass webm_dash_class
static int write_adaptation_set(AVFormatContext *s, int as_index)
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
static int parse_adaptation_sets(AVFormatContext *s)
This structure stores compressed data.
static int check_matching_sample_rate(AVFormatContext *s, const AdaptationSet *as)
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
Writes a formatted string to the context.
int minimum_update_period