**/
#include <stdlib.h>
+#include "libavutil/bswap.h"
+#include "libavcodec/get_bits.h"
#include "avformat.h"
-#include "bitstream.h"
-#include "bswap.h"
#include "oggdec.h"
-typedef struct theora_params {
+struct theora_params {
int gpshift;
int gpmask;
-} theora_params_t;
+ unsigned version;
+};
static int
theora_header (AVFormatContext * s, int idx)
{
- ogg_t *ogg = s->priv_data;
- ogg_stream_t *os = ogg->streams + idx;
+ struct ogg *ogg = s->priv_data;
+ struct ogg_stream *os = ogg->streams + idx;
AVStream *st = s->streams[idx];
- theora_params_t *thp = os->private;
+ struct theora_params *thp = os->private;
int cds = st->codec->extradata_size + os->psize + 2;
uint8_t *cdp;
if (os->buf[os->pstart] == 0x80) {
GetBitContext gb;
int width, height;
- int version;
init_get_bits(&gb, os->buf + os->pstart, os->psize*8);
- skip_bits(&gb, 7*8); /* 0x80"theora" */
+ skip_bits_long(&gb, 7*8); /* 0x80"theora" */
- version = get_bits_long(&gb, 24);
- if (version < 0x030100)
+ thp->version = get_bits_long(&gb, 24);
+ if (thp->version < 0x030100)
{
av_log(s, AV_LOG_ERROR,
- "Too old or unsupported Theora (%x)\n", version);
+ "Too old or unsupported Theora (%x)\n", thp->version);
return -1;
}
height = get_bits(&gb, 16) << 4;
avcodec_set_dimensions(st->codec, width, height);
- if (version >= 0x030400)
+ if (thp->version >= 0x030400)
skip_bits(&gb, 100);
- width = get_bits_long(&gb, 24);
- height = get_bits_long(&gb, 24);
- if ( width <= st->codec->width && width > st->codec->width-16
- && height <= st->codec->height && height > st->codec->height-16)
- avcodec_set_dimensions(st->codec, width, height);
+ if (thp->version >= 0x030200) {
+ width = get_bits_long(&gb, 24);
+ height = get_bits_long(&gb, 24);
+ if ( width <= st->codec->width && width > st->codec->width-16
+ && height <= st->codec->height && height > st->codec->height-16)
+ avcodec_set_dimensions(st->codec, width, height);
- if (version >= 0x030200)
skip_bits(&gb, 16);
+ }
st->codec->time_base.den = get_bits_long(&gb, 32);
st->codec->time_base.num = get_bits_long(&gb, 32);
+ if (!(st->codec->time_base.num > 0 && st->codec->time_base.den > 0)) {
+ av_log(s, AV_LOG_WARNING, "Invalid time base in theora stream, assuming 25 FPS\n");
+ st->codec->time_base.num = 1;
+ st->codec->time_base.den = 25;
+ }
st->time_base = st->codec->time_base;
- st->codec->sample_aspect_ratio.num = get_bits_long(&gb, 24);
- st->codec->sample_aspect_ratio.den = get_bits_long(&gb, 24);
+ st->sample_aspect_ratio.num = get_bits_long(&gb, 24);
+ st->sample_aspect_ratio.den = get_bits_long(&gb, 24);
- if (version >= 0x030200)
- skip_bits(&gb, 38);
- if (version >= 0x304000)
+ if (thp->version >= 0x030200)
+ skip_bits_long(&gb, 38);
+ if (thp->version >= 0x304000)
skip_bits(&gb, 2);
thp->gpshift = get_bits(&gb, 5);
vorbis_comment (s, os->buf + os->pstart + 7, os->psize - 8);
}
- st->codec->extradata = av_realloc (st->codec->extradata, cds);
+ st->codec->extradata = av_realloc (st->codec->extradata,
+ cds + FF_INPUT_BUFFER_PADDING_SIZE);
cdp = st->codec->extradata + st->codec->extradata_size;
*cdp++ = os->psize >> 8;
*cdp++ = os->psize & 0xff;
static uint64_t
theora_gptopts(AVFormatContext *ctx, int idx, uint64_t gp)
{
- ogg_t *ogg = ctx->priv_data;
- ogg_stream_t *os = ogg->streams + idx;
- theora_params_t *thp = os->private;
+ struct ogg *ogg = ctx->priv_data;
+ struct ogg_stream *os = ogg->streams + idx;
+ struct theora_params *thp = os->private;
uint64_t iframe = gp >> thp->gpshift;
uint64_t pframe = gp & thp->gpmask;
+ if (thp->version < 0x030201)
+ iframe++;
+
if(!pframe)
os->pflags |= PKT_FLAG_KEY;
return iframe + pframe;
}
-ogg_codec_t theora_codec = {
+const struct ogg_codec ff_theora_codec = {
.magic = "\200theora",
.magicsize = 7,
.header = theora_header,