/**
* @file generic segmenter
* M3U8 specification can be find here:
- * @url{http://tools.ietf.org/id/draft-pantos-http-live-streaming-08.txt}
+ * @url{http://tools.ietf.org/id/draft-pantos-http-live-streaming}
*/
/* #define DEBUG */
#include "avformat.h"
#include "internal.h"
+#include "libavutil/avassert.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/avstring.h"
#include "libavutil/mathematics.h"
#include "libavutil/timestamp.h"
+typedef struct SegmentListEntry {
+ int index;
+ double start_time, end_time;
+ int64_t start_pts, start_dts;
+ char filename[1024];
+ struct SegmentListEntry *next;
+} SegmentListEntry;
+
typedef enum {
LIST_TYPE_UNDEFINED = -1,
LIST_TYPE_FLAT = 0,
char *list; ///< filename for the segment list file
int list_flags; ///< flags affecting list generation
int list_size; ///< number of entries for the segment list file
- double list_max_segment_time; ///< max segment time in the current list
ListType list_type; ///< set the list type
AVIOContext *list_pb; ///< list file put-byte context
char *time_str; ///< segment duration specification string
char *reference_stream_specifier; ///< reference stream specifier
int reference_stream_index;
- double start_time, end_time;
- int64_t start_pts, start_dts;
+ SegmentListEntry cur_entry;
+ SegmentListEntry *segment_list_entries;
+ SegmentListEntry *segment_list_entries_end;
+
int is_first_pkt; ///< tells if it is the first packet in the segment
} SegmentContext;
av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", s->filename);
return AVERROR(EINVAL);
}
+ av_strlcpy(seg->cur_entry.filename, oc->filename, sizeof(seg->cur_entry.filename));
return 0;
}
&s->interrupt_callback, NULL);
if (ret < 0)
return ret;
- seg->list_max_segment_time = 0;
- if (seg->list_type == LIST_TYPE_M3U8) {
+ if (seg->list_type == LIST_TYPE_M3U8 && seg->segment_list_entries) {
+ SegmentListEntry *entry;
+ double max_duration = 0;
+
avio_printf(seg->list_pb, "#EXTM3U\n");
avio_printf(seg->list_pb, "#EXT-X-VERSION:3\n");
- avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_idx);
+ avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->segment_list_entries->index);
avio_printf(seg->list_pb, "#EXT-X-ALLOWCACHE:%d\n",
!!(seg->list_flags & SEGMENT_LIST_FLAG_CACHE));
- if (seg->list_flags & SEGMENT_LIST_FLAG_LIVE)
- avio_printf(seg->list_pb,
- "#EXT-X-TARGETDURATION:%"PRId64"\n", seg->time / 1000000);
+
+ for (entry = seg->segment_list_entries; entry; entry = entry->next)
+ max_duration = FFMAX(max_duration, entry->end_time - entry->start_time);
+ avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%"PRId64"\n", (int64_t)ceil(max_duration));
}
return ret;
}
-static void segment_list_close(AVFormatContext *s)
+static void segment_list_print_entry(AVIOContext *list_ioctx,
+ ListType list_type,
+ const SegmentListEntry *list_entry)
{
- SegmentContext *seg = s->priv_data;
-
- if (seg->list_type == LIST_TYPE_M3U8) {
- if (!(seg->list_flags & SEGMENT_LIST_FLAG_LIVE))
- avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%d\n",
- (int)ceil(seg->list_max_segment_time));
- avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n");
+ switch (list_type) {
+ case LIST_TYPE_FLAT:
+ avio_printf(list_ioctx, "%s\n", list_entry->filename);
+ break;
+ case LIST_TYPE_CSV:
+ case LIST_TYPE_EXT:
+ print_csv_escaped_str(list_ioctx, list_entry->filename);
+ avio_printf(list_ioctx, ",%f,%f\n", list_entry->start_time, list_entry->end_time);
+ break;
+ case LIST_TYPE_M3U8:
+ avio_printf(list_ioctx, "#EXTINF:%f,\n%s\n",
+ list_entry->end_time - list_entry->start_time, list_entry->filename);
+ break;
+ default:
+ av_assert0(!"Invalid list type");
}
-
- avio_close(seg->list_pb);
}
-static int segment_end(AVFormatContext *s, int write_trailer)
+static int segment_end(AVFormatContext *s, int write_trailer, int is_last)
{
SegmentContext *seg = s->priv_data;
AVFormatContext *oc = seg->avf;
oc->filename);
if (seg->list) {
- if (seg->list_size && !(seg->segment_count % seg->list_size)) {
- segment_list_close(s);
- if ((ret = segment_list_open(s)) < 0)
+ if (seg->list_size || seg->list_type == LIST_TYPE_M3U8) {
+ SegmentListEntry *entry = av_mallocz(sizeof(*entry));
+ if (!entry) {
+ ret = AVERROR(ENOMEM);
goto end;
- }
+ }
+
+ /* append new element */
+ memcpy(entry, &seg->cur_entry, sizeof(*entry));
+ if (!seg->segment_list_entries)
+ seg->segment_list_entries = seg->segment_list_entries_end = entry;
+ else
+ seg->segment_list_entries_end->next = entry;
+ seg->segment_list_entries_end = entry;
+
+ /* drop first item */
+ if (seg->list_size && seg->segment_count > seg->list_size) {
+ entry = seg->segment_list_entries;
+ seg->segment_list_entries = seg->segment_list_entries->next;
+ av_freep(&entry);
+ }
- if (seg->list_type == LIST_TYPE_FLAT) {
- avio_printf(seg->list_pb, "%s\n", oc->filename);
- } else if (seg->list_type == LIST_TYPE_CSV || seg->list_type == LIST_TYPE_EXT) {
- print_csv_escaped_str(seg->list_pb, oc->filename);
- avio_printf(seg->list_pb, ",%f,%f\n", seg->start_time, seg->end_time);
- } else if (seg->list_type == LIST_TYPE_M3U8) {
- avio_printf(seg->list_pb, "#EXTINF:%f,\n%s\n",
- seg->end_time - seg->start_time, oc->filename);
+ avio_close(seg->list_pb);
+ if ((ret = segment_list_open(s)) < 0)
+ goto end;
+ for (entry = seg->segment_list_entries; entry; entry = entry->next)
+ segment_list_print_entry(seg->list_pb, seg->list_type, entry);
+ if (seg->list_type == LIST_TYPE_M3U8 && is_last)
+ avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n");
+ } else {
+ segment_list_print_entry(seg->list_pb, seg->list_type, &seg->cur_entry);
}
- seg->list_max_segment_time = FFMAX(seg->end_time - seg->start_time, seg->list_max_segment_time);
avio_flush(seg->list_pb);
}
av_free(pb);
}
+static int select_reference_stream(AVFormatContext *s)
+{
+ SegmentContext *seg = s->priv_data;
+ int ret, i;
+
+ seg->reference_stream_index = -1;
+ if (!strcmp(seg->reference_stream_specifier, "auto")) {
+ /* select first index of type with highest priority */
+ int type_index_map[AVMEDIA_TYPE_NB];
+ static const enum AVMediaType type_priority_list[] = {
+ AVMEDIA_TYPE_VIDEO,
+ AVMEDIA_TYPE_AUDIO,
+ AVMEDIA_TYPE_SUBTITLE,
+ AVMEDIA_TYPE_DATA,
+ AVMEDIA_TYPE_ATTACHMENT
+ };
+ enum AVMediaType type;
+
+ for (i = 0; i < AVMEDIA_TYPE_NB; i++)
+ type_index_map[i] = -1;
+
+ /* select first index for each type */
+ for (i = 0; i < s->nb_streams; i++) {
+ type = s->streams[i]->codec->codec_type;
+ if ((unsigned)type < AVMEDIA_TYPE_NB && type_index_map[type] == -1
+ /* ignore attached pictures/cover art streams */
+ && !(s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC))
+ type_index_map[type] = i;
+ }
+
+ for (i = 0; i < FF_ARRAY_ELEMS(type_priority_list); i++) {
+ type = type_priority_list[i];
+ if ((seg->reference_stream_index = type_index_map[type]) >= 0)
+ break;
+ }
+ } else {
+ for (i = 0; i < s->nb_streams; i++) {
+ ret = avformat_match_stream_specifier(s, s->streams[i],
+ seg->reference_stream_specifier);
+ if (ret < 0)
+ return ret;
+ if (ret > 0) {
+ seg->reference_stream_index = i;
+ break;
+ }
+ }
+ }
+
+ if (seg->reference_stream_index < 0) {
+ av_log(s, AV_LOG_ERROR, "Could not select stream matching identifier '%s'\n",
+ seg->reference_stream_specifier);
+ return AVERROR(EINVAL);
+ }
+
+ return 0;
+}
+
static int seg_write_header(AVFormatContext *s)
{
SegmentContext *seg = s->priv_data;
AVFormatContext *oc = NULL;
- int ret, i;
+ int ret;
seg->segment_count = 0;
if (!seg->write_header_trailer)
return AVERROR(EINVAL);
}
- if ((seg->list_flags & SEGMENT_LIST_FLAG_LIVE) && (seg->times_str || seg->frames_str)) {
- av_log(s, AV_LOG_ERROR,
- "segment_flags +live and segment_times or segment_frames options are mutually exclusive: "
- "specify segment_time option if you want a live-friendly list\n");
- return AVERROR(EINVAL);
- }
-
if (seg->times_str) {
if ((ret = parse_times(s, &seg->times, &seg->nb_times, seg->times_str)) < 0)
return ret;
if (seg->list_type == LIST_TYPE_EXT)
av_log(s, AV_LOG_WARNING, "'ext' list type option is deprecated in favor of 'csv'\n");
- seg->reference_stream_index = -1;
- if (!strcmp(seg->reference_stream_specifier, "auto")) {
- /* select first index of type with highest priority */
- int type_index_map[AVMEDIA_TYPE_NB];
- static const enum AVMediaType type_priority_list[] = {
- AVMEDIA_TYPE_VIDEO,
- AVMEDIA_TYPE_AUDIO,
- AVMEDIA_TYPE_SUBTITLE,
- AVMEDIA_TYPE_DATA,
- AVMEDIA_TYPE_ATTACHMENT
- };
- enum AVMediaType type;
-
- for (i = 0; i < AVMEDIA_TYPE_NB; i++)
- type_index_map[i] = -1;
-
- /* select first index for each type */
- for (i = 0; i < s->nb_streams; i++) {
- type = s->streams[i]->codec->codec_type;
- if ((unsigned)type < AVMEDIA_TYPE_NB && type_index_map[type] == -1)
- type_index_map[type] = i;
- }
-
- for (i = 0; i < FF_ARRAY_ELEMS(type_priority_list); i++) {
- type = type_priority_list[i];
- if ((seg->reference_stream_index = type_index_map[type]) >= 0)
- break;
- }
- } else {
- for (i = 0; i < s->nb_streams; i++) {
- ret = avformat_match_stream_specifier(s, s->streams[i],
- seg->reference_stream_specifier);
- if (ret < 0)
- goto fail;
- if (ret > 0) {
- seg->reference_stream_index = i;
- break;
- }
- }
- }
-
- if (seg->reference_stream_index < 0) {
- av_log(s, AV_LOG_ERROR, "Could not select stream matching identifier '%s'\n",
- seg->reference_stream_specifier);
- ret = AVERROR(EINVAL);
+ if ((ret = select_reference_stream(s)) < 0)
goto fail;
- }
-
av_log(s, AV_LOG_VERBOSE, "Selected stream id:%d type:%s\n",
seg->reference_stream_index,
av_get_media_type_string(s->streams[seg->reference_stream_index]->codec->codec_type));
fail:
if (ret) {
if (seg->list)
- segment_list_close(s);
+ avio_close(seg->list_pb);
if (seg->avf)
avformat_free_context(seg->avf);
}
(pkt->pts != AV_NOPTS_VALUE &&
av_compare_ts(pkt->pts, st->time_base,
end_pts-seg->time_delta, AV_TIME_BASE_Q) >= 0))) {
- ret = segment_end(s, seg->individual_header_trailer);
+ ret = segment_end(s, seg->individual_header_trailer, 0);
if (!ret)
ret = segment_start(s, seg->individual_header_trailer);
oc = seg->avf;
- seg->start_time = (double)pkt->pts * av_q2d(st->time_base);
- seg->start_pts = av_rescale_q(pkt->pts, st->time_base, AV_TIME_BASE_Q);
- seg->start_dts = pkt->dts != AV_NOPTS_VALUE ?
- av_rescale_q(pkt->dts, st->time_base, AV_TIME_BASE_Q) : seg->start_pts;
+ seg->cur_entry.index = seg->segment_idx;
+ seg->cur_entry.start_time = (double)pkt->pts * av_q2d(st->time_base);
+ seg->cur_entry.start_pts = av_rescale_q(pkt->pts, st->time_base, AV_TIME_BASE_Q);
+ seg->cur_entry.start_dts = pkt->dts != AV_NOPTS_VALUE ?
+ av_rescale_q(pkt->dts, st->time_base, AV_TIME_BASE_Q) : seg->cur_entry.start_pts;
} else if (pkt->pts != AV_NOPTS_VALUE) {
- seg->end_time = FFMAX(seg->end_time,
- (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base));
+ seg->cur_entry.end_time =
+ FFMAX(seg->cur_entry.end_time, (double)(pkt->pts + pkt->duration) * av_q2d(st->time_base));
}
if (seg->is_first_pkt) {
if (seg->reset_timestamps) {
av_log(s, AV_LOG_DEBUG, "start_pts:%s pts:%s start_dts:%s dts:%s",
- av_ts2timestr(seg->start_pts, &AV_TIME_BASE_Q), av_ts2timestr(pkt->pts, &st->time_base),
- av_ts2timestr(seg->start_dts, &AV_TIME_BASE_Q), av_ts2timestr(pkt->dts, &st->time_base));
+ av_ts2timestr(seg->cur_entry.start_pts, &AV_TIME_BASE_Q), av_ts2timestr(pkt->pts, &st->time_base),
+ av_ts2timestr(seg->cur_entry.start_dts, &AV_TIME_BASE_Q), av_ts2timestr(pkt->dts, &st->time_base));
/* compute new timestamps */
if (pkt->pts != AV_NOPTS_VALUE)
- pkt->pts -= av_rescale_q(seg->start_pts, AV_TIME_BASE_Q, st->time_base);
+ pkt->pts -= av_rescale_q(seg->cur_entry.start_pts, AV_TIME_BASE_Q, st->time_base);
if (pkt->dts != AV_NOPTS_VALUE)
- pkt->dts -= av_rescale_q(seg->start_dts, AV_TIME_BASE_Q, st->time_base);
+ pkt->dts -= av_rescale_q(seg->cur_entry.start_dts, AV_TIME_BASE_Q, st->time_base);
av_log(s, AV_LOG_DEBUG, " -> pts:%s dts:%s\n",
av_ts2timestr(pkt->pts, &st->time_base), av_ts2timestr(pkt->dts, &st->time_base));
{
SegmentContext *seg = s->priv_data;
AVFormatContext *oc = seg->avf;
+ SegmentListEntry *cur, *next;
+
int ret;
if (!seg->write_header_trailer) {
- if ((ret = segment_end(s, 0)) < 0)
+ if ((ret = segment_end(s, 0, 1)) < 0)
goto fail;
open_null_ctx(&oc->pb);
ret = av_write_trailer(oc);
close_null_ctx(oc->pb);
} else {
- ret = segment_end(s, 1);
+ ret = segment_end(s, 1, 1);
}
fail:
if (seg->list)
- segment_list_close(s);
+ avio_close(seg->list_pb);
av_opt_free(seg);
av_freep(&seg->times);
av_freep(&seg->frames);
+ cur = seg->segment_list_entries;
+ while (cur) {
+ next = cur->next;
+ av_free(cur);
+ cur = next;
+ }
+
avformat_free_context(oc);
return ret;
}
projects / ffmpeg / blobdiff