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matroska: move LFG state from muxer context to local variable

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The LFG is only used in one place, so there is no need to keep it in
the context.

Originally committed as revision 23527 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-06-08 10:44:27 +00:00
parent 6964d510e8
commit 5150dd532b
1 changed files with 5 additions and 4 deletions
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9
libavformat/matroskaenc.c
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@ -83,7 +83,6 @@ typedef struct MatroskaMuxContext {
mkv_cues *cues;
mkv_track *tracks;
AVLFG lfg;
unsigned int audio_buffer_size;
AVPacket cur_audio_pkt;
} MatroskaMuxContext;
@ -699,8 +698,6 @@ static int mkv_write_header(AVFormatContext *s)
if (!strcmp(s->oformat->name, "webm")) mkv->mode = MODE_WEBM;
else mkv->mode = MODE_MATROSKAv2;
av_lfg_init(&mkv->lfg, av_get_random_seed());
mkv->tracks = av_mallocz(s->nb_streams * sizeof(*mkv->tracks));
if (!mkv->tracks)
return AVERROR(ENOMEM);
@ -736,8 +733,12 @@ static int mkv_write_header(AVFormatContext *s)
put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
uint32_t segment_uid[4];
AVLFG lfg;
av_lfg_init(&lfg, av_get_random_seed());
for (i = 0; i < 4; i++)
segment_uid[i] = av_lfg_get(&mkv->lfg);
segment_uid[i] = av_lfg_get(&lfg);
put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , LIBAVFORMAT_IDENT);
put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);