#include "os_support.h"
#include "url.h"
+// See ISO/IEC 23009-1:2014 5.3.9.4.4
+typedef enum {
+ DASH_TMPL_ID_UNDEFINED = -1,
+ DASH_TMPL_ID_ESCAPE,
+ DASH_TMPL_ID_REP_ID,
+ DASH_TMPL_ID_NUMBER,
+ DASH_TMPL_ID_BANDWIDTH,
+ DASH_TMPL_ID_TIME,
+} DASHTmplId;
+
typedef struct Segment {
char file[1024];
int64_t start_pos;
int nb_segments, segments_size, segment_index;
Segment **segments;
int64_t first_dts, start_dts, end_dts;
+ int bit_rate;
char bandwidth_str[64];
char codec_str[100];
int single_file;
OutputStream *streams;
int has_video, has_audio;
- int last_duration;
- int total_duration;
+ int64_t last_duration;
+ int64_t total_duration;
char availability_start_time[100];
char dirname[1024];
+ const char *single_file_name;
+ const char *init_seg_name;
+ const char *media_seg_name;
} DASHContext;
static int dash_write(void *opaque, uint8_t *buf, int buf_size)
int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
if (!c->use_timeline)
- avio_printf(out, "duration=\"%d\" ", c->last_duration);
- avio_printf(out, "initialization=\"init-stream$RepresentationID$.m4s\" media=\"chunk-stream$RepresentationID$-$Number%%05d$.m4s\" startNumber=\"%d\">\n", c->use_timeline ? start_number : 1);
+ avio_printf(out, "duration=\"%"PRId64"\" ", c->last_duration);
+ avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\">\n", c->init_seg_name, c->media_seg_name, c->use_timeline ? start_number : 1);
if (c->use_timeline) {
avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
for (i = start_index; i < os->nb_segments; ) {
avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
} else if (c->single_file) {
avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
- avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%d\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
+ avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
avio_printf(out, "\t\t\t\t\t<Initialization range=\"%"PRId64"-%"PRId64"\" />\n", os->init_start_pos, os->init_start_pos + os->init_range_length - 1);
for (i = start_index; i < os->nb_segments; i++) {
Segment *seg = os->segments[i];
}
avio_printf(out, "\t\t\t\t</SegmentList>\n");
} else {
- avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%d\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
+ avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
for (i = start_index; i < os->nb_segments; i++) {
Segment *seg = os->segments[i];
}
}
+static DASHTmplId dash_read_tmpl_id(const char *identifier, char *format_tag,
+ size_t format_tag_size, const char **ptr) {
+ const char *next_ptr;
+ DASHTmplId id_type = DASH_TMPL_ID_UNDEFINED;
+
+ if (av_strstart(identifier, "$$", &next_ptr)) {
+ id_type = DASH_TMPL_ID_ESCAPE;
+ *ptr = next_ptr;
+ } else if (av_strstart(identifier, "$RepresentationID$", &next_ptr)) {
+ id_type = DASH_TMPL_ID_REP_ID;
+ // default to basic format, as $RepresentationID$ identifiers
+ // are not allowed to have custom format-tags.
+ av_strlcpy(format_tag, "%d", format_tag_size);
+ *ptr = next_ptr;
+ } else { // the following identifiers may have an explicit format_tag
+ if (av_strstart(identifier, "$Number", &next_ptr))
+ id_type = DASH_TMPL_ID_NUMBER;
+ else if (av_strstart(identifier, "$Bandwidth", &next_ptr))
+ id_type = DASH_TMPL_ID_BANDWIDTH;
+ else if (av_strstart(identifier, "$Time", &next_ptr))
+ id_type = DASH_TMPL_ID_TIME;
+ else
+ id_type = DASH_TMPL_ID_UNDEFINED;
+
+ // next parse the dash format-tag and generate a c-string format tag
+ // (next_ptr now points at the first '%' at the beginning of the format-tag)
+ if (id_type != DASH_TMPL_ID_UNDEFINED) {
+ const char *number_format = DASH_TMPL_ID_TIME ? "lld" : "d";
+ if (next_ptr[0] == '$') { // no dash format-tag
+ snprintf(format_tag, format_tag_size, "%%%s", number_format);
+ *ptr = &next_ptr[1];
+ } else {
+ const char *width_ptr;
+ // only tolerate single-digit width-field (i.e. up to 9-digit width)
+ if (av_strstart(next_ptr, "%0", &width_ptr) &&
+ av_isdigit(width_ptr[0]) &&
+ av_strstart(&width_ptr[1], "d$", &next_ptr)) {
+ // yes, we're using a format tag to build format_tag.
+ snprintf(format_tag, format_tag_size, "%s%c%s", "%0", width_ptr[0], number_format);
+ *ptr = next_ptr;
+ } else {
+ av_log(NULL, AV_LOG_WARNING, "Failed to parse format-tag beginning with %s. Expected either a "
+ "closing '$' character or a format-string like '%%0[width]d', "
+ "where width must be a single digit\n", next_ptr);
+ id_type = DASH_TMPL_ID_UNDEFINED;
+ }
+ }
+ }
+ }
+ return id_type;
+}
+
+static void dash_fill_tmpl_params(char *dst, size_t buffer_size,
+ const char *template, int rep_id,
+ int number, int bit_rate,
+ int64_t time) {
+ int dst_pos = 0;
+ const char *t_cur = template;
+ while (dst_pos < buffer_size - 1 && *t_cur) {
+ char format_tag[7]; // May be "%d", "%0Xd", or "%0Xlld" (for $Time$), where X is in [0-9]
+ int n = 0;
+ DASHTmplId id_type;
+ const char *t_next = strchr(t_cur, '$'); // copy over everything up to the first '$' character
+ if (t_next) {
+ int num_copy_bytes = FFMIN(t_next - t_cur, buffer_size - dst_pos - 1);
+ av_strlcpy(&dst[dst_pos], t_cur, num_copy_bytes + 1);
+ // advance
+ dst_pos += num_copy_bytes;
+ t_cur = t_next;
+ } else { // no more DASH identifiers to substitute - just copy the rest over and break
+ av_strlcpy(&dst[dst_pos], t_cur, buffer_size - dst_pos);
+ break;
+ }
+
+ if (dst_pos >= buffer_size - 1 || !*t_cur)
+ break;
+
+ // t_cur is now pointing to a '$' character
+ id_type = dash_read_tmpl_id(t_cur, format_tag, sizeof(format_tag), &t_next);
+ switch (id_type) {
+ case DASH_TMPL_ID_ESCAPE:
+ av_strlcpy(&dst[dst_pos], "$", 2);
+ n = 1;
+ break;
+ case DASH_TMPL_ID_REP_ID:
+ n = snprintf(&dst[dst_pos], buffer_size - dst_pos, format_tag, rep_id);
+ break;
+ case DASH_TMPL_ID_NUMBER:
+ n = snprintf(&dst[dst_pos], buffer_size - dst_pos, format_tag, number);
+ break;
+ case DASH_TMPL_ID_BANDWIDTH:
+ n = snprintf(&dst[dst_pos], buffer_size - dst_pos, format_tag, bit_rate);
+ break;
+ case DASH_TMPL_ID_TIME:
+ n = snprintf(&dst[dst_pos], buffer_size - dst_pos, format_tag, time);
+ break;
+ case DASH_TMPL_ID_UNDEFINED:
+ // copy over one byte and advance
+ av_strlcpy(&dst[dst_pos], t_cur, 2);
+ n = 1;
+ t_next = &t_cur[1];
+ break;
+ }
+ // t_next points just past the processed identifier
+ // n is the number of bytes that were attempted to be written to dst
+ // (may have failed to write all because buffer_size).
+
+ // advance
+ dst_pos += FFMIN(n, buffer_size - dst_pos - 1);
+ t_cur = t_next;
+ }
+}
+
static char *xmlescape(const char *str) {
int outlen = strlen(str)*3/2 + 6;
char *out = av_realloc(NULL, outlen + 1);
DASHContext *c = s->priv_data;
AVIOContext *out;
char temp_filename[1024];
- const char *write_filename;
int ret, i;
AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
snprintf(temp_filename, sizeof(temp_filename), "%s.tmp", s->filename);
- write_filename = USE_RENAME_REPLACE ? temp_filename : s->filename;
- ret = avio_open2(&out, write_filename, AVIO_FLAG_WRITE, &s->interrupt_callback, NULL);
+ ret = avio_open2(&out, temp_filename, AVIO_FLAG_WRITE, &s->interrupt_callback, NULL);
if (ret < 0) {
- av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", write_filename);
+ av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
return ret;
}
avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
write_time(out, c->total_duration);
avio_printf(out, "\"\n");
} else {
- int update_period = c->last_duration / AV_TIME_BASE;
+ int64_t update_period = c->last_duration / AV_TIME_BASE;
if (c->use_template && !c->use_timeline)
update_period = 500;
- avio_printf(out, "\tminimumUpdatePeriod=\"PT%dS\"\n", update_period);
- avio_printf(out, "\tsuggestedPresentationDelay=\"PT%dS\"\n", c->last_duration / AV_TIME_BASE);
+ avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
+ avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
if (!c->availability_start_time[0] && s->nb_streams > 0 && c->streams[0].nb_segments > 0) {
time_t t = time(NULL);
struct tm *ptm, tmbuf;
avio_printf(out, "</MPD>\n");
avio_flush(out);
avio_close(out);
- return USE_RENAME_REPLACE ? ff_rename(temp_filename, s->filename, s) : 0;
+ return ff_rename(temp_filename, s->filename, s);
}
static int dash_write_header(AVFormatContext *s)
char *ptr;
char basename[1024];
+ if (c->single_file_name)
+ c->single_file = 1;
if (c->single_file)
c->use_template = 0;
AVDictionary *opts = NULL;
char filename[1024];
- int bit_rate = s->streams[i]->codec->bit_rate ?
+ os->bit_rate = s->streams[i]->codec->bit_rate ?
s->streams[i]->codec->bit_rate :
s->streams[i]->codec->rc_max_rate;
- if (bit_rate) {
+ if (os->bit_rate) {
snprintf(os->bandwidth_str, sizeof(os->bandwidth_str),
- " bandwidth=\"%d\"", bit_rate);
+ " bandwidth=\"%d\"", os->bit_rate);
} else {
int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
AV_LOG_ERROR : AV_LOG_WARNING;
goto fail;
}
- if (c->single_file)
- snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.m4s", basename, i);
- else
- snprintf(os->initfile, sizeof(os->initfile), "init-stream%d.m4s", i);
+ if (c->single_file) {
+ if (c->single_file_name)
+ dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->single_file_name, i, 0, os->bit_rate, 0);
+ else
+ snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.m4s", basename, i);
+ } else {
+ dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->init_seg_name, i, 0, os->bit_rate, 0);
+ }
snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
ret = ffurl_open(&os->out, filename, AVIO_FLAG_WRITE, &s->interrupt_callback, NULL);
if (ret < 0)
ffurl_close(os->out);
os->out = NULL;
}
+ av_log(s, AV_LOG_VERBOSE, "Representation %d init segment written to: %s\n", i, filename);
s->streams[i]->time_base = st->time_base;
// If the muxer wants to shift timestamps, request to have them shifted
ret = AVERROR(EINVAL);
}
ret = write_manifest(s, 0);
+ if (!ret)
+ av_log(s, AV_LOG_VERBOSE, "Manifest written to: %s\n", s->filename);
fail:
if (ret)
ffio_wfourcc(pb, "msix");
}
-static void find_index_range(AVFormatContext *s, const char *dirname,
- const char *filename, int64_t pos,
- int *index_length)
+static void find_index_range(AVFormatContext *s, const char *full_path,
+ int64_t pos, int *index_length)
{
- char full_path[1024];
uint8_t buf[8];
URLContext *fd;
int ret;
- snprintf(full_path, sizeof(full_path), "%s%s", dirname, filename);
ret = ffurl_open(&fd, full_path, AVIO_FLAG_READ, &s->interrupt_callback, NULL);
if (ret < 0)
return;
for (i = 0; i < s->nb_streams; i++) {
OutputStream *os = &c->streams[i];
char filename[1024] = "", full_path[1024], temp_path[1024];
- const char *write_path;
int64_t start_pos = avio_tell(os->ctx->pb);
int range_length, index_length = 0;
}
if (!c->single_file) {
- snprintf(filename, sizeof(filename), "chunk-stream%d-%05d.m4s", i, os->segment_index);
+ dash_fill_tmpl_params(filename, sizeof(filename), c->media_seg_name, i, os->segment_index, os->bit_rate, os->start_dts);
snprintf(full_path, sizeof(full_path), "%s%s", c->dirname, filename);
snprintf(temp_path, sizeof(temp_path), "%s.tmp", full_path);
- write_path = USE_RENAME_REPLACE ? temp_path : full_path;
- ret = ffurl_open(&os->out, write_path, AVIO_FLAG_WRITE, &s->interrupt_callback, NULL);
+ ret = ffurl_open(&os->out, temp_path, AVIO_FLAG_WRITE, &s->interrupt_callback, NULL);
if (ret < 0)
break;
write_styp(os->ctx->pb);
+ } else {
+ snprintf(full_path, sizeof(full_path), "%s%s", c->dirname, os->initfile);
}
+
av_write_frame(os->ctx, NULL);
avio_flush(os->ctx->pb);
os->packets_written = 0;
range_length = avio_tell(os->ctx->pb) - start_pos;
if (c->single_file) {
- find_index_range(s, c->dirname, os->initfile, start_pos, &index_length);
+ find_index_range(s, full_path, start_pos, &index_length);
} else {
ffurl_close(os->out);
os->out = NULL;
- ret = USE_RENAME_REPLACE ? ff_rename(temp_path, full_path, s) : 0;
+ ret = ff_rename(temp_path, full_path, s);
if (ret < 0)
break;
}
add_segment(os, filename, os->start_dts, os->end_dts - os->start_dts, start_pos, range_length, index_length);
+ av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, full_path);
}
if (c->window_size || (final && c->remove_at_exit)) {
{ "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, E },
{ "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, E },
{ "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, E },
+ { "single_file_name", "DASH-templated name to be used for baseURL. Implies storing all segments in one file, accessed using byte ranges", OFFSET(single_file_name), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
+ { "init_seg_name", "DASH-templated name to used for the initialization segment", OFFSET(init_seg_name), AV_OPT_TYPE_STRING, {.str = "init-stream$RepresentationID$.m4s"}, 0, 0, E },
+ { "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 },
{ NULL },
};
projects / ffmpeg / blobdiff