[PATCH] Added oggpagesize option for Ogg encoding. Allows setting a preferred page size. When set, if an Ogg stream buffer has enough data, a page is made, instead of filling maximum-size pages.
Andres Gonzalez
acandido
Wed Jan 26 11:41:00 CET 2011
---
libavformat/oggenc.c | 30 ++++++++++++++++++++++++++++--
1 files changed, 28 insertions(+), 2 deletions(-)
diff --git a/libavformat/oggenc.c b/libavformat/oggenc.c
index b72efc8..b8e5ce9 100644
--- a/libavformat/oggenc.c
+++ b/libavformat/oggenc.c
@@ -20,6 +20,7 @@
*/
#include "libavutil/crc.h"
+#include "libavutil/opt.h"
#include "libavutil/random_seed.h"
#include "libavcodec/xiph.h"
#include "libavcodec/bytestream.h"
@@ -61,9 +62,26 @@ typedef struct OGGPageList {
} OGGPageList;
typedef struct {
+ const AVClass *class;
OGGPageList *page_list;
+ int pref_size; ///< preferred page size (0 => fill all segments)
} OGGContext;
+
+static const AVOption options[] = {
+ { "oggpagesize", "Set preferred Ogg page size.",
+ offsetof(OGGContext, pref_size), FF_OPT_TYPE_INT, 0, 0, MAX_PAGE_SIZE, AV_OPT_FLAG_ENCODING_PARAM},
+ { NULL },
+};
+
+static const AVClass ogg_muxer_class = {
+ "Ogg muxer",
+ av_default_item_name,
+ options,
+ LIBAVUTIL_VERSION_INT,
+};
+
+
static void ogg_update_checksum(AVFormatContext *s, ByteIOContext *pb, int64_t crc_offset)
{
int64_t pos = url_ftell(pb);
@@ -173,6 +191,7 @@ static int ogg_buffer_data(AVFormatContext *s, AVStream *st,
uint8_t *data, unsigned size, int64_t granule)
{
OGGStreamContext *oggstream = st->priv_data;
+ OGGContext *ogg = s->priv_data;
int total_segments = size / 255 + 1;
uint8_t *p = data;
int i, segments, len, flush = 0;
@@ -208,8 +227,14 @@ static int ogg_buffer_data(AVFormatContext *s, AVStream *st,
if (i == total_segments)
page->granule = granule;
- if (page->segments_count == 255) {
- ogg_buffer_page(s, oggstream);
+ if(ogg->pref_size <= 0) {
+ if (page->segments_count == 255) {
+ ogg_buffer_page(s, oggstream);
+ }
+ } else {
+ if (page->size >= ogg->pref_size) {
+ ogg_buffer_page(s, oggstream);
+ }
}
}
@@ -513,4 +538,5 @@ AVOutputFormat ogg_muxer = {
ogg_write_header,
ogg_write_packet,
ogg_write_trailer,
+ .priv_class = &ogg_muxer_class,
};
--
1.7.1
--------------010200050207080101030409--
More information about the ffmpeg-devel
mailing list