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lavf/segment: add SegmentListEntry and use it 

This patch is propedeutic to the incoming patch which adds
support to sliding window segment listing.
This commit is contained in:
Stefano Sabatini 2012-12-11 00:14:22 +01:00
parent 176b72a28c
commit 6b7d9d5153
1 changed files with 47 additions and 22 deletions
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69
libavformat/segment.c
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@ -31,6 +31,7 @@
#include "avformat.h"
#include "internal.h"
#include "libavutil/avassert.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/avstring.h"
@ -38,6 +39,14 @@
#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,
@ -85,8 +94,7 @@ typedef struct {
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;
int is_first_pkt; ///< tells if it is the first packet in the segment
} SegmentContext;
@ -153,6 +161,7 @@ static int set_segment_filename(AVFormatContext *s)
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;
}
@ -230,6 +239,28 @@ static void segment_list_close(AVFormatContext *s)
avio_close(seg->list_pb);
}
static void segment_list_print_entry(AVIOContext *list_ioctx,
ListType list_type,
const SegmentListEntry *list_entry)
{
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");
}
}
static int segment_end(AVFormatContext *s, int write_trailer)
{
SegmentContext *seg = s->priv_data;
@ -251,16 +282,9 @@ static int segment_end(AVFormatContext *s, int write_trailer)
goto end;
}
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);
}
seg->list_max_segment_time = FFMAX(seg->end_time - seg->start_time, seg->list_max_segment_time);
segment_list_print_entry(seg->list_pb, seg->list_type, &seg->cur_entry);
seg->list_max_segment_time =
FFMAX(seg->cur_entry.end_time - seg->cur_entry.start_time, seg->list_max_segment_time);
avio_flush(seg->list_pb);
}
@ -619,13 +643,14 @@ static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)
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) {
@ -637,14 +662,14 @@ static int seg_write_packet(AVFormatContext *s, AVPacket *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));