st->sample_aspect_ratio = (AVRational){ aspectn, aspectd };
st->codec->chroma_sample_location = chroma_sample_location;
st->codec->field_order = field_order;
+ s->packet_size = avpicture_get_size(st->codec->pix_fmt, width, height) + Y4M_FRAME_MAGIC_LEN;
+ if ((int) s->packet_size < 0)
+ return s->packet_size;
+ s->internal->data_offset = avio_tell(pb);
+
+ st->duration = (avio_size(pb) - avio_tell(pb)) / s->packet_size;
return 0;
}
{
int i;
char header[MAX_FRAME_HEADER+1];
- int packet_size, width, height, ret;
- AVStream *st = s->streams[0];
+ int ret;
+ int64_t off = avio_tell(s->pb);
for (i = 0; i < MAX_FRAME_HEADER; i++) {
header[i] = avio_r8(s->pb);
if (strncmp(header, Y4M_FRAME_MAGIC, strlen(Y4M_FRAME_MAGIC)))
return AVERROR_INVALIDDATA;
- width = st->codec->width;
- height = st->codec->height;
-
- packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
- if (packet_size < 0)
- return packet_size;
-
- ret = av_get_packet(s->pb, pkt, packet_size);
+ ret = av_get_packet(s->pb, pkt, s->packet_size - Y4M_FRAME_MAGIC_LEN);
if (ret < 0)
return ret;
- else if (ret != packet_size)
+ else if (ret != s->packet_size - Y4M_FRAME_MAGIC_LEN)
return s->pb->eof_reached ? AVERROR_EOF : AVERROR(EIO);
pkt->stream_index = 0;
+ pkt->pts = (off - s->internal->data_offset) / s->packet_size;
+ pkt->duration = 1;
+ return 0;
+}
+
+static int yuv4_read_seek(AVFormatContext *s, int stream_index,
+ int64_t pts, int flags)
+{
+ avio_seek(s->pb, pts * s->packet_size + s->internal->data_offset, SEEK_SET);
return 0;
}
.read_probe = yuv4_probe,
.read_header = yuv4_read_header,
.read_packet = yuv4_read_packet,
+ .read_seek = yuv4_read_seek,
.extensions = "y4m",
};