static u_char*
mss_write_manifest_chunks_live(u_char* p, segment_durations_t* segment_durations)
{
segment_duration_item_t* cur_item;
segment_duration_item_t* last_item = segment_durations->items + segment_durations->item_count;
uint32_t repeat_count;
bool_t first_time = TRUE;
for (cur_item = segment_durations->items; cur_item < last_item; cur_item++)
{
repeat_count = cur_item->repeat_count;
// output the timestamp in the first chunk
if (first_time)
{
p = vod_sprintf(p, MSS_CHUNK_TAG_LIVE_FIRST,
mss_rescale_millis(segment_durations->start_time),
rescale_time(cur_item->duration, segment_durations->timescale, MSS_TIMESCALE));
repeat_count--;
first_time = FALSE;
}
// output only the duration in subsequent chunks
for (; repeat_count > 0; repeat_count--)
{
p = vod_sprintf(p, MSS_CHUNK_TAG_LIVE, rescale_time(cur_item->duration, segment_durations->timescale, MSS_TIMESCALE));
}
}
return p;
}
static void
mss_get_segment_timing_info(media_sequence_t* sequence, segment_timing_info_t* result)
{
media_clip_filtered_t* cur_clip;
media_track_t* track;
cur_clip = sequence->filtered_clips;
track = cur_clip->first_track;
result->timestamp = track->first_frame_time_offset + mss_rescale_millis(track->clip_start_time);
result->duration = track->total_frames_duration;
cur_clip++;
for (; cur_clip < sequence->filtered_clips_end; cur_clip++)
{
track = cur_clip->first_track;
result->duration += track->total_frames_duration;
}
}
vod_status_t
mss_packager_build_fragment_header(
request_context_t* request_context,
media_set_t* media_set,
uint32_t segment_index,
size_t extra_traf_atoms_size,
mss_write_extra_traf_atoms_callback_t write_extra_traf_atoms_callback,
void* write_extra_traf_atoms_context,
bool_t size_only,
vod_str_t* result,
size_t* total_fragment_size)
{
segment_timing_info_t timing_info;
media_clip_filtered_t* cur_clip;
media_sequence_t* sequence = media_set->sequences;
input_frame_t* last_frame;
input_frame_t* cur_frame;
media_track_t* first_track = sequence->filtered_clips[0].first_track;
media_track_t* track;
uint32_t media_type = sequence->media_type;
size_t mdat_atom_size;
size_t trun_atom_size;
size_t moof_atom_size;
size_t traf_atom_size;
size_t result_size;
u_char* p;
// calculate sizes
mdat_atom_size = ATOM_HEADER_SIZE + sequence->total_frame_size;
trun_atom_size = mp4_builder_get_trun_atom_size(media_type, sequence->total_frame_count);
traf_atom_size =
ATOM_HEADER_SIZE +
ATOM_HEADER_SIZE + sizeof(tfhd_atom_t) +
trun_atom_size +
ATOM_HEADER_SIZE + sizeof(uuid_tfxd_atom_t) +
extra_traf_atoms_size;
if (media_set->type == MEDIA_SET_LIVE)
{
traf_atom_size += TFRF_ATOM_SIZE;
}
moof_atom_size =
ATOM_HEADER_SIZE +
ATOM_HEADER_SIZE + sizeof(mfhd_atom_t)+
traf_atom_size;
result_size =
moof_atom_size +
ATOM_HEADER_SIZE; // mdat
*total_fragment_size = result_size + sequence->total_frame_size;
// head request optimization
if (size_only)
{
return VOD_OK;
}
// allocate the buffer
result->data = vod_alloc(request_context->pool, result_size);
if (result->data == NULL)
{
vod_log_debug0(VOD_LOG_DEBUG_LEVEL, request_context->log, 0,
"mss_packager_build_fragment_header: vod_alloc failed");
return VOD_ALLOC_FAILED;
}
p = result->data;
// moof
write_atom_header(p, moof_atom_size, 'm', 'o', 'o', 'f');
// moof.mfhd
p = mp4_builder_write_mfhd_atom(p, segment_index);
// moof.traf
write_atom_header(p, traf_atom_size, 't', 'r', 'a', 'f');
// moof.traf.tfhd
switch (media_type)
{
case MEDIA_TYPE_VIDEO:
p = mss_write_tfhd_atom(p, first_track->media_info.track_id, 0x01010000);
break;
case MEDIA_TYPE_AUDIO:
p = mss_write_tfhd_atom(p, first_track->media_info.track_id, 0x02000000);
break;
}
// moof.traf.trun
for (cur_clip = sequence->filtered_clips; cur_clip < sequence->filtered_clips_end; cur_clip++)
{
track = cur_clip->first_track;
cur_frame = track->first_frame;
last_frame = track->last_frame;
for (; cur_frame < last_frame; cur_frame++)
{
cur_frame->duration = rescale_time(cur_frame->duration, track->media_info.timescale, MSS_TIMESCALE);
cur_frame->pts_delay = rescale_time(cur_frame->pts_delay, track->media_info.timescale, MSS_TIMESCALE);
}
}
p = mp4_builder_write_trun_atom(
p,
sequence,
moof_atom_size + ATOM_HEADER_SIZE);
if (media_set->type == MEDIA_SET_LIVE)
{
// using only estimate timing info in live, since we don't have the accurate timing
// for the lookahead segments. the timestamp has to be consistent between segments/manifest
// otherwise some segments may be pulled more than once
timing_info.timestamp = mss_rescale_millis(media_set->segment_start_time);
timing_info.duration = mss_rescale_millis(media_set->segmenter_conf->segment_duration);
p = mss_write_uuid_tfxd_atom(p, &timing_info);
p = mss_write_uuid_tfrf_atom(p, &timing_info);
}
else
{
mss_get_segment_timing_info(sequence, &timing_info);
p = mss_write_uuid_tfxd_atom(p, &timing_info);
}
// moof.traf.xxx
if (write_extra_traf_atoms_callback != NULL)
{
p = write_extra_traf_atoms_callback(write_extra_traf_atoms_context, p, moof_atom_size);
}
// mdat
write_atom_header(p, mdat_atom_size, 'm', 'd', 'a', 't');
result->len = p - result->data;
if (result->len != result_size)
{
vod_log_error(VOD_LOG_ERR, request_context->log, 0,
"mss_packager_build_fragment_header: result length %uz is different than allocated length %uz",
result->len, result_size);
return VOD_UNEXPECTED;
}
return VOD_OK;
}
vod_status_t
mss_packager_build_manifest(
request_context_t* request_context,
mss_manifest_config_t* conf,
media_set_t* media_set,
size_t extra_tags_size,
mss_write_tags_callback_t write_extra_tags,
void* extra_tags_writer_context,
vod_str_t* result)
{
segmenter_conf_t* segmenter_conf = media_set->segmenter_conf;
media_sequence_t* cur_sequence;
media_track_t* last_track;
media_track_t* cur_track;
segment_durations_t segment_durations[MEDIA_TYPE_COUNT];
uint64_t duration_100ns;
uint32_t media_type;
uint32_t stream_index;
uint32_t bitrate;
vod_status_t rc;
size_t result_size;
u_char* p;
if (media_set->use_discontinuity)
{
vod_log_error(VOD_LOG_ERR, request_context->log, 0,
"mss_packager_build_manifest: discontinuity is not supported in MSS");
return VOD_BAD_MAPPING;
}
// calculate the result size
result_size =
sizeof(MSS_MANIFEST_HEADER_PREFIX) - 1 + VOD_INT64_LEN + sizeof(MSS_MANIFEST_HEADER_SUFFIX) - 1 +
extra_tags_size +
sizeof(MSS_MANIFEST_FOOTER);
if (media_set->type == MEDIA_SET_LIVE)
{
result_size += sizeof(MSS_MANIFEST_HEADER_LIVE_ATTRIBUTES) - 1 + VOD_INT64_LEN + VOD_INT32_LEN;
}
for (media_type = 0; media_type < MEDIA_TYPE_COUNT; media_type++)
{
if (media_set->track_count[media_type] == 0)
{
continue;
}
rc = segmenter_conf->get_segment_durations(
request_context,
segmenter_conf,
media_set,
NULL,
media_type,
&segment_durations[media_type]);
if (rc != VOD_OK)
{
return rc;
}
result_size +=
sizeof(MSS_STREAM_INDEX_HEADER) - 1 + 2 * sizeof(MSS_STREAM_TYPE_VIDEO) + 2 * VOD_INT32_LEN +
sizeof(MSS_STREAM_INDEX_FOOTER);
switch (media_set->type)
{
case MEDIA_SET_VOD:
result_size += segment_durations[media_type].segment_count * (sizeof(MSS_CHUNK_TAG) + VOD_INT32_LEN + VOD_INT64_LEN);
break;
case MEDIA_SET_LIVE:
result_size += segment_durations[media_type].segment_count * (sizeof(MSS_CHUNK_TAG_LIVE) + VOD_INT64_LEN) +
sizeof(MSS_CHUNK_TAG_LIVE_FIRST) + 2 * VOD_INT64_LEN;
break;
}
}
mss_packager_remove_redundant_tracks(conf->duplicate_bitrate_threshold, media_set);
cur_track = media_set->filtered_tracks;
last_track = cur_track + media_set->total_track_count;
for (; cur_track < last_track; cur_track++)
{
switch (cur_track->media_info.media_type)
{
case MEDIA_TYPE_VIDEO:
result_size +=
sizeof(MSS_VIDEO_QUALITY_LEVEL_HEADER) - 1 + 4 * VOD_INT32_LEN + cur_track->media_info.extra_data_size * 2 +
sizeof(MSS_QUALITY_LEVEL_FOOTER) - 1;
break;
case MEDIA_TYPE_AUDIO:
result_size +=
sizeof(MSS_AUDIO_QUALITY_LEVEL_HEADER) - 1 + 6 * VOD_INT32_LEN + cur_track->media_info.extra_data_size * 2 +
sizeof(MSS_QUALITY_LEVEL_FOOTER) - 1;
break;
}
}
// allocate the result
result->data = vod_alloc(request_context->pool, result_size);
if (result->data == NULL)
{
vod_log_debug0(VOD_LOG_DEBUG_LEVEL, request_context->log, 0,
"mss_packager_build_manifest: vod_alloc failed");
return VOD_ALLOC_FAILED;
}
// header
if (media_set->type != MEDIA_SET_LIVE)
{
duration_100ns = mss_rescale_millis(media_set->total_duration);
}
else
{
duration_100ns = 0;
}
p = vod_sprintf(result->data, MSS_MANIFEST_HEADER_PREFIX, duration_100ns);
if (media_set->type == MEDIA_SET_LIVE)
{
media_type = media_set->track_count[MEDIA_TYPE_VIDEO] != 0 ? MEDIA_TYPE_VIDEO : MEDIA_TYPE_AUDIO;
p = vod_sprintf(p, MSS_MANIFEST_HEADER_LIVE_ATTRIBUTES,
mss_rescale_millis(segment_durations[media_type].segment_count * segmenter_conf->segment_duration),
MSS_LOOK_AHEAD_COUNT);
}
p = vod_copy(p, MSS_MANIFEST_HEADER_SUFFIX, sizeof(MSS_MANIFEST_HEADER_SUFFIX) - 1);
if (media_set->track_count[MEDIA_TYPE_VIDEO] != 0)
{
p = vod_sprintf(p,
MSS_STREAM_INDEX_HEADER,
MSS_STREAM_TYPE_VIDEO,
media_set->track_count[MEDIA_TYPE_VIDEO],
segment_durations[MEDIA_TYPE_VIDEO].segment_count,
MSS_STREAM_TYPE_VIDEO);
stream_index = 0;
for (cur_sequence = media_set->sequences; cur_sequence < media_set->sequences_end; cur_sequence++)
{
last_track = cur_sequence->filtered_clips[0].last_track;
for (cur_track = cur_sequence->filtered_clips[0].first_track; cur_track < last_track; cur_track++)
{
if (cur_track->media_info.media_type != MEDIA_TYPE_VIDEO)
{
continue;
}
bitrate = cur_track->media_info.bitrate;
bitrate = mss_encode_indexes(bitrate, cur_sequence->index, cur_track->index);
p = vod_sprintf(p, MSS_VIDEO_QUALITY_LEVEL_HEADER,
stream_index++,
bitrate,
(uint32_t)cur_track->media_info.u.video.width,
(uint32_t)cur_track->media_info.u.video.height);
p = mss_append_hex_string(p, cur_track->media_info.extra_data, cur_track->media_info.extra_data_size);
p = vod_copy(p, MSS_QUALITY_LEVEL_FOOTER, sizeof(MSS_QUALITY_LEVEL_FOOTER) - 1);
}
}
switch (media_set->type)
{
case MEDIA_SET_VOD:
p = mss_write_manifest_chunks(p, &segment_durations[MEDIA_TYPE_VIDEO]);
break;
case MEDIA_SET_LIVE:
p = mss_write_manifest_chunks_live(p, &segment_durations[MEDIA_TYPE_VIDEO]);
break;
}
p = vod_copy(p, MSS_STREAM_INDEX_FOOTER, sizeof(MSS_STREAM_INDEX_FOOTER) - 1);
}
if (media_set->track_count[MEDIA_TYPE_AUDIO] != 0)
{
p = vod_sprintf(p, MSS_STREAM_INDEX_HEADER,
MSS_STREAM_TYPE_AUDIO,
media_set->track_count[MEDIA_TYPE_AUDIO],
segment_durations[MEDIA_TYPE_AUDIO].segment_count,
MSS_STREAM_TYPE_AUDIO);
stream_index = 0;
for (cur_sequence = media_set->sequences; cur_sequence < media_set->sequences_end; cur_sequence++)
{
last_track = cur_sequence->filtered_clips[0].last_track;
for (cur_track = cur_sequence->filtered_clips[0].first_track; cur_track < last_track; cur_track++)
{
if (cur_track->media_info.media_type != MEDIA_TYPE_AUDIO)
{
continue;
}
bitrate = cur_track->media_info.bitrate;
bitrate = mss_encode_indexes(bitrate, cur_sequence->index, cur_track->index);
p = vod_sprintf(p, MSS_AUDIO_QUALITY_LEVEL_HEADER,
stream_index++,
bitrate,
cur_track->media_info.u.audio.sample_rate,
(uint32_t)cur_track->media_info.u.audio.channels,
(uint32_t)cur_track->media_info.u.audio.bits_per_sample,
(uint32_t)cur_track->media_info.u.audio.packet_size);
p = mss_append_hex_string(p, cur_track->media_info.extra_data, cur_track->media_info.extra_data_size);
p = vod_copy(p, MSS_QUALITY_LEVEL_FOOTER, sizeof(MSS_QUALITY_LEVEL_FOOTER) - 1);
}
}
switch (media_set->type)
{
case MEDIA_SET_VOD:
p = mss_write_manifest_chunks(p, &segment_durations[MEDIA_TYPE_AUDIO]);
break;
case MEDIA_SET_LIVE:
p = mss_write_manifest_chunks_live(p, &segment_durations[MEDIA_TYPE_AUDIO]);
break;
}
p = vod_copy(p, MSS_STREAM_INDEX_FOOTER, sizeof(MSS_STREAM_INDEX_FOOTER) - 1);
}
if (write_extra_tags != NULL)
{
p = write_extra_tags(extra_tags_writer_context, p, media_set);
}
p = vod_copy(p, MSS_MANIFEST_FOOTER, sizeof(MSS_MANIFEST_FOOTER) - 1);
result->len = p - result->data;
if (result->len > result_size)
{
vod_log_error(VOD_LOG_ERR, request_context->log, 0,
"mss_packager_build_manifest: result length %uz exceeded allocated length %uz",
result->len, result_size);
return VOD_UNEXPECTED;
}
return VOD_OK;
}
